Indoor unit of air conditioner

Abstract

This indoor unit of an air conditioner comprises a mounting plate fixed to a wall surface, and a main body having a heat exchanger and a blower fan inside, including a rear case attached to the mounting plate, and forming box-shaped outer casing, wherein the mounting plate has a base portion, a protrusion portion with a hook-shaped portion, and an upper support hook for hooking the main body, wherein the rear case has a hook insertion portion hooked to the upper support hook, and a central insertion portion into which the hook-shaped portion is inserted, wherein the central insertion portion includes a rear wall portion and a central wall portion with a hook-shaped lower end portion, and wherein the hook-shaped portion inserted into the central insertion portion faces the rear wall portion and the central wall portion in the longitudinal direction of the main body, and when the main body is tilted, the lower end portion of the central wall portion and the tip portion of the hook-shaped portion come into contact with each other so that upward movement of the main body by a set distance or more is restricted.

Description

Air conditioner indoor unit

[0001] The present disclosure relates to an indoor unit of a wall-mounted air conditioner.

[0002] Conventional air conditioner indoor units are installed on a wall by firmly attaching a mounting plate to the wall with screws, and by hooking an insertion part on the rear side of the indoor unit's main body, which fits into a hook, onto a hook provided on the top of the mounting plate (see, for example, Patent Document 1). Extension piping, drain hoses, and internal / external connection wiring connected to the air conditioner indoor unit are led from the outside to the inside of the room using through holes provided in the wall.

[0003] Japanese Utility Model Application Laid-Open Publication No. 01-151130

[0004] In the indoor unit of the air conditioner disclosed in Patent Document 1, when connecting an extension pipe or the like to the main body of the indoor unit, the main body is rotated forward around the hook of the mounting plate as a fulcrum, ensuring work space below the main body. Furthermore, in some cases, the main body is rotated forward around the hook of the mounting plate as a fulcrum, and auxiliary installation supports are used on the back of the main body of the indoor unit to ensure space between the main body and the mounting plate to maintain work space, and the auxiliary installation supports are removed after completing the connection of the extension pipe or the like. When connecting the extension pipe or the like to the indoor unit of the air conditioner disclosed in Patent Document 1, the main body moves upward when the main body is rotated forward around the hook of the mounting plate as a fulcrum, causing the insertion portion of the main body to come off the hook of the mounting plate, which could result in the main body falling off the mounting plate.

[0005] The present disclosure is intended to solve the above-mentioned problems and to provide an indoor unit of an air conditioner that prevents the main body from falling off the mounting plate during the series of steps of installing the main body on the mounting plate.

[0006] The indoor unit of an air conditioner according to the present disclosure comprises a mounting plate fixed to a wall surface, and a main body portion having a heat exchanger and a blower fan inside and including a back case attached to the mounting plate to form a box-shaped outer shell, the mounting plate having a base portion formed in a flat plate shape and fixed to the wall surface, and a protrusion portion formed in a box shape protruding from the base portion toward the main body portion when the main body portion is attached to the mounting plate, the protrusion portion having a hook-shaped portion protruding upward at the tip of the protruding direction, and upper support hooks provided on both the left and right sides of the protrusion above the protrusion portion, protruding upward from the base portion toward the main body portion when the main body portion is attached to the mounting plate, and for hooking the main body portion when attached to the mounting plate, and the back case and a central insertion portion into which the hook-shaped portion is inserted when the main body is attached to the mounting plate, the central insertion portion including a rear wall portion that forms the wall on the rear side of the main body, and a plate-like central wall portion that is spaced apart from the rear wall portion and is disposed outwardly of the rear wall portion, protruding downward from the top of the rear case, and having a hook-shaped lower end portion. When the main body is attached to the mounting plate, the hook-shaped portion inserted into the central insertion portion faces the rear wall portion and the central wall portion in the front-to-rear direction of the main body, and when the front of the main body is lifted upward and the main body is tilted, the lower end portion of the central wall portion and the tip end of the hook-shaped portion come into contact, restricting upward movement of the main body more than a set distance.

[0007] In the indoor unit of an air conditioner according to the present disclosure, when the main body is attached to the mounting plate, the hook-shaped portion inserted into the central insertion portion faces the rear wall portion and the central wall portion in the front-to-rear direction of the main body. When the front of the main body is lifted upward and tilted, the lower end of the central wall portion abuts against the tip of the hook-shaped portion, restricting upward movement of the main body beyond a set distance. When an operator rotates the main body forward using the hook of the mounting plate as a fulcrum, the upward movement of the main body is restricted, preventing the main body from coming off the mounting plate, and preventing the main body from falling off the mounting plate.

[0008] 1 is a conceptual diagram showing the configuration of a refrigerant circuit of an air conditioner according to an embodiment. A conceptual diagram of an air conditioner according to an embodiment. A perspective view of an indoor unit of an air conditioner according to an embodiment. A conceptual diagram showing the interior of an indoor unit of an air conditioner according to an embodiment. An exploded perspective view of an indoor unit of an air conditioner according to an embodiment. A conceptual diagram showing an example of a mounting plate for an indoor unit according to an embodiment. A front view of an example of a mounting plate for an indoor unit according to an embodiment. A side view of an example of a mounting plate for an indoor unit according to an embodiment. An enlarged view showing a side of a protrusion of a mounting plate in an indoor unit according to an embodiment. A perspective view of a protrusion of a mounting plate in an indoor unit according to an embodiment. A bottom perspective view of a rear case in an indoor unit according to an embodiment. An enlarged perspective view of a central insertion section in an indoor unit according to an embodiment. A conceptual diagram of cross sections in the up-down and front-back directions of the central insertion section in an indoor unit according to an embodiment. A perspective view of an indoor unit according to an embodiment in a state where piping is being connected after installation. A cross-sectional view of an indoor unit according to an embodiment in a state where piping is being connected. An enlarged cross-sectional view of an arrangement portion of a protrusion in an indoor unit according to an embodiment in a state where piping is being connected. Fig. 1 is an enlarged cross-sectional view of the arrangement of the protrusion in an installation-completed state of the indoor unit according to the embodiment; Fig. 2 is an enlarged cross-sectional view of the arrangement of the protrusion when the main body of the indoor unit according to the embodiment is about to fall off; Fig. 3 is a front view of the indoor unit according to the embodiment when a chemical crack has occurred in the rear case; Fig. 4 is a back view of the indoor unit according to the embodiment when a chemical crack has occurred in the rear case.

[0009] An indoor unit of an air conditioner according to an embodiment will be described below with reference to the drawings. Note that in the following drawings, including FIG. 1, the relative dimensional relationships and shapes of the components may differ from those in reality. In the following drawings, the same reference numerals denote the same or equivalent components, and this applies throughout the entire specification. To facilitate understanding, directional terms (e.g., up, down, right, left, front, rear, etc.) are used as appropriate, but these notations are merely for the convenience of explanation and do not limit the arrangement or orientation of the device or components.

[0010] Embodiment [Air conditioner 10] Fig. 1 is a conceptual diagram showing the configuration of a refrigerant circuit 15 of an air conditioner 10 according to an embodiment. Fig. 2 is a conceptual diagram of the air conditioner 10 according to an embodiment. The air conditioner 10 will be described using Figs. 1 and 2. The air conditioner 10 performs air conditioning by heating or cooling the room by transferring heat between the outside air and the indoor air via the refrigerant. The air conditioner 10 has an outdoor unit 500 and an indoor unit 100.

[0011] In the air conditioner 10, an outdoor unit 500 and an indoor unit 100 are connected by refrigerant piping 11 to form a refrigerant circuit 15 through which refrigerant circulates. In the refrigerant circuit 15 of the air conditioner 10, a compressor 501, a flow path switching device 502, an outdoor heat exchanger 503, an expansion valve 504, and a heat exchanger 120 are connected in sequence via the refrigerant piping 11. Note that the air conditioner 10 does not necessarily have to have the flow path switching device 502.

[0012] The refrigerant piping 11 connecting the outdoor unit 500 and the indoor unit 100 is housed inside the connection extension piping 12. By connecting the indoor unit 100 and the outdoor unit 500 of the air conditioner 10 using the connection extension piping 12, the refrigerant circulates inside the refrigerant piping 11 when the air conditioner 10 is operating.

[0013] [Outdoor Unit 500] The outdoor unit 500 has a compressor 501, a flow path switching device 502, an outdoor heat exchanger 503, and an expansion valve 504. The compressor 501 compresses and discharges the refrigerant it draws in. The flow path switching device 502 is, for example, a four-way valve, and switches the direction of the refrigerant flow path. The air conditioner 10 can achieve heating or cooling operation by switching the refrigerant flow using the flow path switching device 502 based on instructions from a control device (not shown).

[0014] The outdoor heat exchanger 503 exchanges heat between the refrigerant and the outdoor air. The outdoor heat exchanger 503 functions as an evaporator during heating operation and as a condenser during cooling operation. The outdoor heat exchanger 503 is provided with an outdoor blower 508 to increase the efficiency of heat exchange between the refrigerant and the outdoor air. The expansion valve 504 is a throttling device (flow rate control means) that functions as an expansion valve by adjusting the flow rate of the refrigerant flowing through the expansion valve 504, and by changing the opening degree, adjusts the pressure of the refrigerant.

[0015] [Indoor unit 100] Figure 3 is a perspective view of the indoor unit 100 of the air conditioner 10 according to the embodiment. Figure 4 is a conceptual diagram showing the interior of the indoor unit 100 of the air conditioner 10 according to the embodiment. Figure 5 is an exploded perspective view of the indoor unit 100 of the air conditioner 10 according to the embodiment. The X axis shown in the following drawings, including Figure 3, indicates the width direction of the indoor unit 100, the Y axis indicates the depth direction or front-to-back direction of the indoor unit 100, and the Z axis indicates the up-down direction of the indoor unit 100.

[0016] When viewing the indoor unit 100 from the front, the X1 side is the left side, the X2 side is the right side, the Y1 side on the Y axis is the front side, the Y2 side is the rear or back side, and the Z1 side on the Z axis is the upper or top side, and the Z2 side is the lower side. In addition, the positional relationships between the components in this specification (for example, the up-down relationship) are, in principle, those when the indoor unit 100 is installed in a usable state.

[0017] As shown in Figure 2, the indoor unit 100 of the air conditioner 10 is attached to, for example, a wall surface 400 of a room to provide indoor air conditioning. The indoor unit 100 supplies conditioned air to an air-conditioned space, such as a room, by utilizing a refrigeration cycle that circulates a refrigerant. The indoor unit 100 has a main body 200 that is formed with an intake port 201 for drawing indoor air into the interior and an outlet port 202 for supplying the conditioned air to the area to be air-conditioned. The indoor unit 100 also has an installation plate 300 that is fixed to the wall surface 400 of the air-conditioned space (see Figures 5 and 6) and to which the main body 200 is attached.

[0018] (Main body 200) The main body 200 has the heat exchanger 120 and the blower fan 110 inside, and includes a rear case 210 that is attached to the mounting plate 300, forming a box-shaped outer shell. More specifically, the main body 200 has the rear case 210, a design panel 220, and a main body upper surface 230. The main body 200, with the rear case 210, the design panel 220, and the main body upper surface 230 combined together, forms the outer shell of the indoor unit 100. The main body 200, with the rear case 210, the design panel 220, and the main body upper surface 230 combined together, forms a box-shaped housing.

[0019] The rear case 210 forms an outer wall on at least the rear side of the main body 200. The rear case 210 faces the mounting plate 300 and is attached to the mounting plate 300 by engaging with a portion of the mounting plate 300. A blower fan 110, a heat exchanger 120, a drain pan 130, an electrical component box 140, and a sensor and display unit 150 (described later) are attached to the portion of the rear case 210 opposite the mounting plate 300 in the front-to-rear direction (Y-axis direction) of the main body 200. The detailed configuration of the rear case 210 will be described later.

[0020] The main body upper surface 230 forms at least a part of the wall on the top surface side of the main body 200. The main body upper surface 230 forms an intake port 201 for air flowing from the outside of the main body 200 into the inside of the main body 200. The main body upper surface 230 may be formed by an automatic cleaning assembly having, for example, a filter that removes dust from the air that flows into the main body 200 through the intake port 201, a cleaning mechanism for automatically cleaning the filter, and a dust box (not shown). The main body upper surface 230 is attached to the rear case 210 and the design panel 220.

[0021] The design panel 220 forms the outer walls on the side, front, and bottom sides of the main body 200. The design panel 220 also forms part of the wall on the top side of the main body 200. The design panel 220 forms the air outlet 202 through which air is blown from inside the main body 200 to outside the main body 200. As shown in Figure 4, the design panel 220 and the rear case 210 form an air passage 203 through which air passes inside the main body 200.

[0022] The design panel 220 includes a front design panel 221. The front design panel 221 forms the outer wall on the front side of the main body 200 and forms the front design surface. The front design panel 221 is rotatably attached to the upper left and right sides of the design panel 220 to facilitate installation, cleaning, and inspection. For example, the front design panel 221 is fixed to a shaft provided on the upper left and right sides of the design panel 220 so that it can be attached, detached, and opened and closed.

[0023] As shown in Fig. 4, the main body 200 has an air inlet 201 formed on an upper surface 230 of the main body 200, and an air outlet 202 formed below the air inlet 201. In the indoor unit 100, the air outlet 202 is formed at the bottom of a front surface 205 of the main body 200 and on the front side of a lower surface 206 of the main body 200.

[0024] A flap 135 is disposed at the air outlet 202. The flap 135 opens and closes the air outlet 202, and adjusts the direction in which the air conditioned in the heat exchanger 120 (hereinafter referred to as "conditioned air") is blown out. The flap 135 adjusts the direction in which the conditioned air is blown out in the left-right and up-down directions. The flap 135 is provided, for example, on the underside of the drain pan 130.

[0025] The main body 200 has a blower fan 110, a heat exchanger 120, a drain pan 130, an electrical component box 140, and a sensor and display unit 150. As shown in Figures 4 and 5 , the main body 200 is equipped with the blower fan 110, the heat exchanger 120, the drain pan 130, the electrical component box 140, and the sensor and display unit 150.

[0026] The blower fan 110 is, for example, a cross-flow fan, and forms an air flow. The blower fan 110 takes in air into the main body 200 through an inlet 201 of the main body 200, exchanges heat between the taken-in air and the refrigerant flowing inside the heat exchanger 120, and blows out the conditioned air after the heat exchange from an outlet 202 of the main body 200. The blower fan 110 is attached to the rear case 210, and is disposed downstream of the heat exchanger 120 in an air path 203 from the inlet 201 to the outlet 202.

[0027] The heat exchanger 120 exchanges heat between the refrigerant flowing inside the heat exchanger 120 and the air supplied from the blower fan 110. The heat exchanger 120 adjusts the temperature and humidity of the air that is drawn into the main body 200 from the outside and blown out from the main body 200 into the space to be air-conditioned. The heat exchanger 120 functions as a condenser during heating operation, condensing and liquefying the refrigerant. The heat exchanger 120 also functions as an evaporator during cooling operation, evaporating and vaporizing the refrigerant.

[0028] The indoor unit 100 draws indoor air through an intake port 201 at the top of the main body 200 using a blower fan 110, exchanges heat with the drawn air in a heat exchanger 120 to turn it into cool air or warm air, and then blows the cool air or warm air into the room through an outlet port 202.

[0029] The drain pan 130 is disposed below the heat exchanger 120 within the main body 200 and receives drain water dripping from the heat exchanger 120. The drain water collected in the drain pan 130 is directed to the outside by a drainage mechanism (not shown). The flap 135 described above is provided on the underside of the drain pan 130. The electrical equipment box 140 houses devices such as circuit components used to control the air conditioner 10. The sensor and display unit 150 includes various sensors used to control the air conditioner 10 and displays the operating status of the air conditioner 10.

[0030] (Mounting plate 300) Fig. 6 is a conceptual diagram showing an example of the mounting plate 300 of the indoor unit 100 according to the embodiment. Fig. 7 is a front view showing an example of the mounting plate 300 of the indoor unit 100 according to the embodiment. Fig. 8 is a side view showing an example of the mounting plate 300 of the indoor unit 100 according to the embodiment. The dotted symbol lead lines shown in Figs. 6 to 8 indicate the configuration of the back side of the plate surface. The mounting plate 300 will be described using Figs. 6 to 8.

[0031] The mounting plate 300 is used to attach the main body 200 to a wall surface 400. The mounting plate 300 is fixed to the wall surface 400 as shown in Fig. 6. The wall surface 400 has a through hole 405 through which the connection extension pipe 12 (see Figs. 1 and 2) is inserted.

[0032] The mounting plate 300 is made of a substantially rectangular metal plate and is fixed to a room wall surface 400 with fixing members such as screws, bolts, or nails. As shown in Fig. 7, the mounting plate 300 includes a base portion 305, a plurality of upper support hooks 310, a mounting plate lower end portion 320, and a protrusion 330.

[0033] The base member 305 is formed in a generally rectangular flat plate shape. The base member 305 is the portion of the mounting plate 300 that is fixed to the wall surface 400. One plate surface of the base member 305 abuts against the wall surface 400, and the other plate surface faces the rear case 210 of the main body 200.

[0034] The upper support hooks 310 are provided above the protruding portions 330 on both the left and right sides of the protruding portions 330, and protrude upward from the base portion 305 toward the main body portion 200 when the main body portion 200 is attached to the mounting plate 300. The upper support hooks 310 hook the main body portion 200 when the main body portion 200 is attached to the mounting plate 300.

[0035] The upper support hook 310 is a portion on which the main body 200 is hooked and which supports the main body 200. The upper support hook 310 is formed so as to hook onto a hook insertion portion 211 (see FIG. 11 ) provided on the upper rear surface of the rear case 210.

[0036] The upper support hook 310 is provided on the upper edge 305a of the base portion 305. The mounting plate 300 has a plurality of upper support hooks 310. The plurality of upper support hooks 310 are provided at intervals along the longitudinal direction (X-axis direction) of the indoor unit 100 and the base portion 305.

[0037] The upper support hooks 310 are provided, for example, near the ends of the base portion 305 in the longitudinal direction (X-axis direction). That is, the upper support hooks 310 are provided on the upper edge 305a of the base portion 305, at both left and right ends of the base portion 305. It is sufficient that the upper support hooks 310 are provided in at least two locations, one on the left and one on the right, of the base portion 305, and they may be provided in three or more locations on the base portion 305.

[0038] Upper support hook 310 protrudes toward rear case 210 and is formed in an L-shaped bent shape when viewed from the side of mounting plate 300. Note that when viewed from the side of mounting plate 300 opposite to that shown in Figure 8, upper support hook 310 is formed in an L-shape with the left and right reversed. The tip of the part of upper support hook 310 that protrudes toward rear case 210 and is bent upward is referred to as hook base 311.

[0039] The mounting plate lower end 320 is provided on the lower edge 305b of the base material 305. As shown in Fig. 8 , the portion of the mounting plate lower end 320 that is connected to the base material 305 is bent so as to extend from the lower edge 305b of the base material 305 toward the rear case 210. The mounting plate lower end 320 extends in the direction in which the plate surface of the base material 305 faces (the Y-axis direction), and also extends in the longitudinal direction of the base material 305 (the X-axis direction). The mounting plate lower end 320 engages with the lower end of the rear case 210.

[0040] Fig. 9 is an enlarged view showing the side of the protruding portion 330 of the mounting plate 300 in the indoor unit 100 according to the embodiment. Fig. 10 is a perspective view of the protruding portion 330 of the mounting plate 300 in the indoor unit 100 according to the embodiment. The dotted lines leading to the symbols shown in Figs. 9 and 10 indicate the configuration on the back side of the plate surface. The protruding portion 330 will be described using Figs. 7 to 10.

[0041] The protrusion 330 limits the rotation of the main body 200 in the vertical direction within a specific range when installing the indoor unit 100. The protrusion 330, together with the central insertion portion 212, prevents the main body 200 from moving upward when installing the indoor unit 100. The protrusion 330 also prevents the main body 200 from falling if the rear case 210 comes off the upper support hook 310.

[0042] The protruding portion 330 is formed so as to protrude from the base portion 305 towards the rear case 210. In other words, the protruding portion 330 is formed so as to protrude from the plate surface of the base portion 305 on the side facing the rear case 210. The protruding portion 330 is formed by drawing, and is connected to the base portion 305 of the mounting plate 300 which is fixed to the wall surface 400, and is integral with the base portion 305, resulting in a highly strong shape. Because the protruding portion 330 is formed by drawing, the plate thickness of the protruding portion 330 is approximately the same as the plate thickness of the base portion 305.

[0043] As shown in Fig. 7 , the protrusion 330 is formed on the upper part of the base material 305, including the upper edge 305a of the base material 305. The protrusion 330 is formed in the center of the base material 305 in the longitudinal direction (X-axis direction) of the base material 305. Furthermore, as shown in Fig. 9 , the protrusion 330 is formed below the upper support hook 310. The protrusion 330 of the mounting plate 300 is provided on the front side and below the upper support hook 310.

[0044] 10 , the protrusion 330 is formed such that the shape of the protrusion 330 decreases from the base 341, which is the root portion of the protrusion 330, toward the tip 342. The shape of the protrusion 330 is smaller at the tip 342 than at the base 341 of the protrusion 330. The shape of the protrusion 330 decreases from the base 341 to the tip 342 of the protrusion 330 such that the bottom and side portions converge at the center.

[0045] The protruding portion 330 is formed so that the plate surface facing the wall surface 400 is recessed. The protruding portion 330 is formed hollow, and a space S surrounded by the wall surface 400 that constitutes the protruding portion 330 is formed inside the protruding portion 330. The protruding portion 330 is formed in a box shape that forms the space S.

[0046] Protrusion 330 has upper opening 330a at upper edge 330a1, which is the edge portion on the upper surface side of protrusion 330, and has rear-side opening 330b at edge portion 330b1 on the wall surface 400 side. Upper opening 330a opens upward, and rear-side opening 330b opens toward the rear, i.e., in the direction opposite to the direction in which protrusion 330 protrudes.

[0047] 6, when the mounting plate 300 is attached to the wall surface 400, the rear opening 330b is closed by the wall surface 400, and a space is formed between the protruding portion 330 and the wall surface 400. This space communicates with the outside of the protruding portion 330 at the upper opening 330a.

[0048] 10 , the protruding portion 330 has a bulging portion 331, a tip wall portion 332, and a hook-shaped portion 333. The mounting plate 300 is formed by drawing the base material portion 305 and the protruding portion 330 integrally. That is, the mounting plate 300 is formed by integrally forming the base material portion 305, the bulging portion 331, the tip wall portion 332, and the hook-shaped portion 333.

[0049] Bulging portion 331 constitutes a wall that extends so as to protrude from base portion 305 in the direction of the plate surface of base portion 305 facing rear case 210. Bulging portion 331 is a box-shaped portion of protruding portion 330 that protrudes from base portion 305 of protruding portion 330 toward main body 200 when main body 200 is attached to mounting plate 300. Bulging portion 331 forms a space S inside. Bulging portion 331 is formed by upper edge portion 330a1 of bulging portion 331, and includes an upper opening 330a that opens upward.

[0050] The bulging portion 331 has a W-shaped cross section along the plate surface of the base portion 305, i.e., a cross section along the vertical direction (Z-axis direction) and longitudinal direction (X-axis direction) of the mounting plate 300. The bulging portion 331 protrudes from the base portion 305, and a cross section parallel to the plate surface of the base portion 305 has a W-shape.

[0051] The bulging portion 331 is formed integrally with the base portion 305 so that the cross-sectional shape of the bulging portion 331 decreases from the base portion 341 to the tip portion 342 of the protruding portion 330. The shape of the bulging portion 331 is smaller at the tip portion 342 than at the base portion 341 of the protruding portion 330. The shape of the bulging portion 331 decreases from the base portion 341 to the tip portion 342 of the protruding portion 330 so that the bottom and side portions converge at the center.

[0052] The bulging portion 331 has a first bulging portion 331a, a second bulging portion 331b, and an upper surface portion 331c. The first bulging portion 331a has a V-shaped cross section along the plate surface of the base material 305. The second bulging portion 331b also has a V-shaped cross section along the plate surface of the base material 305. The upper surface portion 331c is a wall provided between the first bulging portion 331a and the second bulging portion 331b in the longitudinal direction (X-axis direction) of the mounting plate 300.

[0053] The bulging portion 331 includes an upper surface portion 331c. The upper surface portion 331c is a plate-like portion extending from the base portion 305 toward the tip wall portion 332, and constitutes the apex of the central peak of the W-shape. The upper surface portion 331c is formed inside the bulging portion 331 below the upper opening 330a.

[0054] The upper surface portion 331c is a plate-like portion that extends from the base portion 305 toward the rear case 210 and in the longitudinal direction (X-axis direction) of the mounting plate 300. The upper surface portion 331c is provided at the apex of the central peak of the W-shape of the bulging portion 331, which has a W-shaped cross section along the plate surface of the base portion 305.

[0055] The upper surface portion 331c is the bottom portion of the portion recessed upward between the first bulging portion 331a and the second bulging portion 331b when viewed from the arrangement side of the main body portion 200. The upper surface portion 331c is the top surface portion of the portion protruding upward between the first bulging portion 331a and the second bulging portion 331b when viewed from the wall surface 400 side.

[0056] The upper surface portion 331c is formed below the upper edge 305a of the mounting plate 300 and below the upper edge portion 330a1 that forms the upper opening 330a of the protrusion 330. The upper surface portion 331c is inclined with respect to the plate surface of the base portion 305, and the inner surface of the protrusion 330 is inclined so as to face upward and toward the rear. When the rear case 210 comes off the upper support hook 310, the upper surface portion 331c abuts against the central wall portion 213 (see FIG. 12 ) of the rear case 210, preventing the main body 200 from falling.

[0057] The tip wall 332 is a wall provided at the tip 342 of the protrusion 330. The tip wall 332 is formed in a plate shape. The tip wall 332 faces a rear wall 214 (described later) of the main body 200 when the main body 200 is attached to the mounting plate 300. The tip wall 332 may be formed parallel to the extension direction of the base member 305, or may be inclined so that the upper part of the tip wall 332 is inclined toward the rear case 210.

[0058] A hook-shaped portion 333 formed integrally with the tip wall portion 332 is provided on the upper portion of the tip wall portion 332. The protruding portion 330 is formed in a box shape that protrudes from the base portion 305 toward the main body portion 200 when the main body portion 200 is attached to the mounting plate 300, and has a hook-shaped hook portion 333 that protrudes upward at the tip portion in the protruding direction.

[0059] The hook portion 333 is inserted into a central insertion portion 212 (see FIG. 11 ) of the rear case 210, which will be described later, when the main body 200 is attached to the mounting plate 300. The hook portion 333, together with the central insertion portion 212, prevents the main body 200 from moving upward.

[0060] The hook-shaped portion 333 forms a wall that protrudes upward from the tip wall portion 332. The hook-shaped portion 333 is formed by bending a plate-shaped member. The hook-shaped portion 333 is formed to extend along the longitudinal direction (X-axis direction) of the base portion 305, and is formed to extend upward from the tip wall portion 332. The hook-shaped portion 333 is formed in a hook shape when viewed from the side along the longitudinal direction (X-axis direction) of the base portion 305.

[0061] The hook-shaped portion 333 includes an inclined piece 334 at the tip of its upper portion. The inclined piece 334 is inclined with respect to the tip wall portion 332. When viewed from the side along the longitudinal direction (X-axis direction) of the base portion 305, the inclined piece 334 has an upper end that is inclined in a direction approaching the base portion 305.

[0062] The inclined piece 334 is formed so as to extend upward and toward the wall surface 400 when the mounting plate 300 is attached to the wall surface 400. That is, the hook-shaped portion 333 is provided on the upper part of the tip wall portion 332, and includes the inclined piece 334 at its tip that is inclined with respect to the tip wall portion 332 and extends upward and toward the base portion 305.

[0063] The hook-shaped portion 333 and the tip wall portion 332 include a tightly bent portion 303. The tightly bent portion 303 is a portion formed by tight bending. The tightly bent portion 303 is a portion formed into a hemmed shape by, for example, hemming. The tightly bent portion 303 is a portion where the outer edge portions of the hook-shaped portion 333 and the tip wall portion 332 are folded back shortly to tightly fit the plate surfaces.

[0064] The close-contact bent portion 303 is integrally formed in the hook portion 333 and the tip wall portion 332. The close-contact bent portion 303 is formed continuously from the tip wall portion 332 to the hook portion 333. The close-contact bent portion 303 is formed over the entire hook portion 333 and the tip wall portion 332.

[0065] As shown in Figure 9, the vertical length of the hook-shaped portion 333 is shorter than the vertical length of the upper support hook 310. Furthermore, the vertical length of the hook-shaped portion 333 along the plate surface is shorter than the vertical length of the upper support hook 310 along the plate surface. To ensure the strength of the hook-shaped portion 333, it is desirable that the vertically extending length of the hook-shaped portion 333 be short. The tip of the inclined piece portion 334 is located below the upper edge 305a of the mounting plate 300. In other words, the hook-shaped portion 333 is located below the upper support hook 310.

[0066] When attaching the main body 200 to the mounting plate 300, the upper support hook 310 and the hook-shaped portion 333 of the protrusion 330 of the mounting plate 300, and the hook insertion portion 211 and the central insertion portion 212 of the rear case 210 are in a blind spot for the installer, making it difficult to determine their positions. Therefore, if the hook-shaped portion 333 is longer than the upper support hook 310, the portion of the rear case 210 near the central insertion portion 212 is more likely to come into contact with the hook-shaped portion 333, which could cause the hook-shaped portion 333 to deform.

[0067] In the indoor unit 100, the hook-shaped portion 333 is shorter than the upper support hook 310, and the upper support hook 310 is longer than the hook-shaped portion 333. By the worker being aware of inserting the upper support hook 310 into the hook insertion portion 211, the hook-shaped portion 333 is less likely to come into contact with the central insertion portion 212 in the indoor unit 100 compared to when the hook-shaped portion 333 is longer than the upper support hook 310, and deformation of the hook-shaped portion 333 can be prevented.

[0068] 11 is a bottom perspective view of the rear case 210 in the indoor unit 100 according to the embodiment. The rear case 210 has a hook insertion portion 211 and a central insertion portion 212.

[0069] The hook insertion portion 211 is a portion into which the upper support hook 310 of the mounting plate 300 is inserted and hooked onto when the main body portion 200 is attached to the mounting plate 300. The hook insertion portion 211 is formed on the upper edge portion 210a on the rear side of the rear case 210 to hook onto the upper support hook 310 provided on the upper edge 305a of the mounting plate 300. The hook insertion portion 211 is configured to be hooked onto the upper support hook 310 of the mounting plate 300.

[0070] By hooking the hook insertion portion 211 provided on the upper back surface of the rear case 210 onto the upper support hook 310 of the mounting plate 300, the hook insertion portion 211 and the upper support hook 310 engage with each other, and the main body 200 is supported by the mounting plate 300.

[0071] The hook insertion portions 211 are formed at positions corresponding to the upper support hooks 310. For example, the hook insertion portions 211 are provided near the longitudinal ends (X-axis direction) of the rear case 210, and are provided at both left and right ends of the rear case 210 at the upper edge portions 210a of the rear case 210. The hook insertion portions 211 are provided at both ends of the main body portion 200 in the left-right direction perpendicular to the up-down direction, in a direction along the plate surface of the base portion 305.

[0072] A central insertion portion 212 is formed on an upper edge 210a on the rear side of the rear case 210 to be hooked onto an upper support hook 310 provided on an upper edge 305a of the mounting plate 300. The central insertion portion 212 is provided in the center of the upper part of the rear side of the rear case 210.

[0073] The central insertion portion 212 is configured so that the protrusion 330 of the mounting plate 300 is inserted into it. More specifically, the central insertion portion 212 is configured so that the hook-shaped portion 333 of the protrusion 330 is inserted into it when the main body 200 is attached to the mounting plate 300. The central insertion portion 212 is formed at a position corresponding to the hook-shaped portion 333. The central insertion portion 212 is provided at or near the center of the rear case 210 in the longitudinal direction (X-axis direction). In other words, the central insertion portion 212 is provided at the center of the main body 200 in the left-right direction perpendicular to the up-down direction, which is a direction along the plate surface of the base 305.

[0074] The central insertion portion 212, together with the protrusion 330, limits the rotation of the main body 200 in the vertical direction within a specific range when installing the indoor unit 100. The central insertion portion 212, together with the protrusion 330, prevents the main body 200 from moving upward when installing the indoor unit 100. The central insertion portion 212, together with the protrusion 330, prevents the main body 200 from falling if the rear case 210 comes off the upper support hook 310.

[0075] The rear case 210 has a plate-shaped rib 200b that extends in the longitudinal direction (X-axis direction) of the rear case 210 at the top of the rear case 210. The hook insertion portion 211 and the central insertion portion 212 are provided in a part of the rib 200b in the longitudinal direction (X-axis direction). The rib 200b has openings for the hook insertion portion 211 and the central insertion portion 212.

[0076] Fig. 12 is an enlarged perspective view of the central insertion portion 212 in the indoor unit 100 according to the embodiment. Fig. 13 is a conceptual diagram of the vertical and front-to-rear cross sections of the central insertion portion 212 in the indoor unit 100 according to the embodiment. The structure of the central insertion portion 212 will be further explained using Figs. 12 and 13. The central insertion portion 212 includes a rear wall portion 214 and a central wall portion 213. The central insertion portion 212 is constituted by a part of the rear wall portion 214 and the central wall portion 213.

[0077] The rear case 210 has a rear wall 214 that forms the wall on the rear side of the main body 200. The rear wall 214 is provided so as to face some of the devices inside the main body 200, such as the heat exchanger 120. The rear wall 214 forms part of the air passage 203 that runs from the air inlet 201 to the air outlet 202. The rear wall 214 is formed in a plate shape. The rear wall 214 is formed to extend in the vertical direction (Z-axis direction) and also in the longitudinal direction of the rear case 210 (X-axis direction).

[0078] The rear case 210 has a central wall 213 provided on the rear side of the rear wall 214 at a distance from the rear wall 214. A main body space S1 is formed between the rear wall 214 and the central wall 213. A hook portion 333 (see FIG. 18 ) of the protrusion 330 is disposed in the main body space S1. When the main body 200 is attached to the mounting plate 300, the hook portion 333 inserted into the central insertion portion 212 faces the rear wall 214 and the central wall 213 in the front-to-rear direction of the main body 200.

[0079] The central wall portion 213 is provided to face the rear wall portion 214 in the front-to-rear direction (Y-axis direction) of the rear case 210. The central wall portion 213 is formed at a position corresponding to the hook-shaped portion 333. The central wall portion 213 is provided at or near the center of the rear case 210 in the longitudinal direction (X-axis direction).

[0080] As described above, the central wall 213 is provided on the outside of the rear wall 214 with a gap therebetween, protrudes downward from the upper part of the rear case 210, and has a hook-shaped lower end 213a. Note that, when the space accommodating the heat exchanger 120 and the like is positioned inside the main body 200 with respect to the rear wall 214, the outside of the rear wall 214 refers to the side opposite the inside of the rear wall 214.

[0081] The central wall 213 is formed in the shape of a rectangular plate. The upper part of the central wall 213 is integrally formed and fixed to the upper part of the rear case 210, and the lower part is a free end that is not fixed. The upper part of the central wall 213 extends upward and is formed flush with the upper wall 210c of the rear case 210. The upper wall 210c is a wall that extends above the central wall 213.

[0082] The central wall 213 is formed in a convex shape so as to protrude from the rib 200b. The maximum width of the central wall 213 in the longitudinal direction (X-axis direction) of the rear case 210 is smaller than the opening width of the upper opening 330a (see FIG. 10 ) of the protruding portion 330. The central wall 213 is formed to a size that allows it to be inserted inside the protruding portion 330.

[0083] The central wall 213 has side edges 213b extending downward from the rib 200b and a free lower end 213a. Thick end ribs 213c extending in the front-to-rear direction (Y-axis direction) of the rear case 210 are provided on the side edges 213b and the lower end 213a. The end ribs 213c are formed integrally with the ribs 200b. By providing the end ribs 213c on the side edges 213b and the lower end 213a, the central wall 213 can have improved strength compared to a case where the end ribs 213c are not provided.

[0084] 13, an inclined wall portion 213d is provided on the inner wall surface of the lower end portion 213a of the central wall portion 213. The inclined wall portion 213d is provided on the surface of the central wall portion 213 that faces the rear wall portion 214, and protrudes toward the rear wall portion 214 at the lower end portion 213a.

[0085] The inclined wall portion 213d forms an inclined surface on the surface of the central wall portion 213 that faces the rear wall portion 214. The inclined wall portion 213d is formed so as to protrude toward the rear wall portion 214 as it moves from the upper part of the central wall portion 213 to the lower part. The inclined wall portion 213d forms an inclined surface on the surface that faces the rear wall portion 214, inclined upward and toward the rear wall portion 214. The central wall portion 213, including the inclined wall portion 213d, is formed in a hook shape when viewed in the longitudinal direction (X-axis direction) of the rear case 210.

[0086] An opening 200c is formed in the rib 200b, which is formed integrally with the central wall 213. The opening 200c is a hole that passes through the rib 200b in the vertical direction. Therefore, the rear case 210 is formed so that an upper space S2 above the rib 200b communicates with a main body space S1, which is the space between the central wall 213 and the rear wall 214.

[0087] [Fixing the Main Body 200 to the Mounting Plate 300] The mounting plate 300 is installed on a wall (see FIG. 6 ). The mounting plate 300 is firmly fixed to a wall surface 400 with fixing members such as screws. After the mounting plate 300 is fixed to the wall surface 400, the main body 200 is fixed to the mounting plate 300.

[0088] When fixing the main body 200 to the mounting plate 300, the worker hooks the hook insertion portion 211 (see FIG. 11 ) provided on the upper back surface of the main body 200 onto the upper support hook 310 (see FIG. 6 ) of the mounting plate 300. Next, the worker pushes the lower portion of the main body 200 toward the mounting plate 300 while rotating the main body 200 (see FIG. 2 ) using the upper support hook 310 as a fulcrum, thereby fixing the main body 200 to the mounting plate 300. This fixes the main body 200 to the mounting plate 300, and the indoor unit 100 is installed on the wall surface 400.

[0089] [Work to connect pipes of indoor unit 100] Figure 14 is a perspective view of the indoor unit 100 according to the embodiment in a state where pipes are being connected after installation. Figure 15 is a cross-sectional view of the indoor unit 100 according to the embodiment in a state where pipes are being connected. Note that Figure 15 is a cross-section of the main body 200 in the front-to-back direction (Y-axis direction) and the up-down direction (Z-axis direction), and is a cross-sectional view of the main body 200 including the central insertion portion 212. Using Figures 14 and 15, the installation procedure for the indoor unit 100 for connecting pipes of the indoor unit 100 when the indoor unit 100 is attached to the installation plate 300, such as in an existing installation or when being relocated, is shown.

[0090] The connection extension pipe 12 is led from the outdoors to the indoors using a through-hole 405 provided in the wall. One end of the connection extension pipe 12 is connected to the outdoor unit 500, and the other end is connected to the indoor unit 100 (see FIG. 2). In addition, a drain hose and internal / external connection wiring (not shown) connecting the indoor unit 100 and the outdoor unit 500 are also led from the outdoors to the indoors using the through-hole 405 provided in the wall.

[0091] With the indoor unit 100 main body 200 attached to the installation plate 300, the indoor connection pipe 125 connected to the heat exchanger 120 is connected to the connection extension pipe 12. As shown in Figure 14, the worker needs to secure a work space WS for connecting the pipes below the rear side of the main body 200 in order to connect the union 125a provided at the end of the indoor connection pipe 125 to the flare nut 12a provided on the connection extension pipe 12.

[0092] 15, the worker tilts the main body 200 by lifting the main body lower end 207 of the main body 200 while rotating it forward, using the hook root 311 (see FIG. 8) of the upper support hook 310 as a fulcrum. The worker secures a working space WS between the main body 200 and the installation plate 300 by tilting the main body 200 using the hook root 311 (see FIG. 8) as a fulcrum so that the front side of the main body 200 is higher than the rear side.

[0093] As shown in Figure 15, in order to tilt the main body 200 to secure the work space WS and maintain the tilt of the main body 200, the worker inserts an installation support pillar 14 between the installation plate 300 and the rear case 210 of the main body 200, and supports the main body 200 with the installation support pillar 14.

[0094] The auxiliary installation supports 14 are sandwiched between the main body 200 and the installation plate 300 to maintain the work space WS. For example, a packing box for packing the indoor unit 100 is used as the auxiliary installation supports 14. The auxiliary installation supports 14 are not limited to packing boxes, and may be pillar-shaped or rod-shaped, or any other object that can support the main body 200.

[0095] After the piping connection work is completed, the worker needs to gently lift the lower end 207 of the main body 200 again to slightly widen the work space WS in order to remove the auxiliary installation support 14 sandwiched between the main body 200 and the mounting plate 300. If the worker holds down the lower front part 208 of the main body 200 while lifting it, the entire main body 200 is likely to move upward (toward Z1). Therefore, in air conditioner indoor units that do not have the central insertion part 212 and the protrusion 330, the hook insertion part 211 (see FIG. 11) of the main body 200 may come off the upper support hook 310 (see FIG. 6) of the mounting plate 300, causing the main body 200 to fall off the mounting plate 300.

[0096] Fig. 16 is an enlarged cross-sectional view of the arrangement portion of the protrusion 330 in the state where the piping of the indoor unit 100 according to the embodiment is being connected. Fig. 17 is an enlarged perspective cross-sectional view of the arrangement portion of the protrusion 330 in the state where the piping of the indoor unit 100 according to the embodiment is being connected. The mechanism of the indoor unit 100 that prevents the main body 200 from falling off the mounting plate 300 will be described using Figs. 16 and 17 .

[0097] As described above, the indoor unit 100 has the central insertion portion 212 in the center of the upper back side of the rear case 210, and the central insertion portion 212 has the central wall portion 213 formed in a hook shape with an inclined wall portion 213d at its tip. The indoor unit 100 also has a protrusion 330 with a hook-shaped portion 333 formed in a hook shape in the center of the upper part of the mounting plate 300.

[0098] 16 and 17, at the start and end of piping connection work, the worker rotates the main body 200 around the hook base 311 (see FIG. 8) as a fulcrum to tilt the main body 200. In this state, the indoor unit 100 is caught by contacting two hook-shaped portions: the inclined wall portion 213d at the tip of the hook-shaped central wall portion 213 and the inclined piece portion 334 at the tip of the hook-shaped portion 333.

[0099] When the front of the main body 200 is lifted upward and the main body 200 is tilted, the lower end 213a of the central wall 213 comes into contact with the tip of the hook 333, restricting the main body 200 from moving upward more than a set distance. More specifically, when the front of the main body 200 is lifted upward and the main body 200 is tilted, the inclined wall 213d of the central wall 213 comes into contact with the inclined piece 334 of the hook 333, restricting the main body 200 from moving upward more than a set distance.

[0100] The central wall 213 of the main body 200 and the protruding portion 330 of the mounting plate 300 are caught, thereby preventing the main body 200 from moving upward. Therefore, the hook insertion portion 211 (see FIG. 11 ) of the main body 200 of the indoor unit 100 does not come off the upper support hook 310 (see FIG. 6 ) of the mounting plate 300, and the main body 200 can be prevented from falling off the mounting plate 300.

[0101] [Function and Effect of the Air Conditioner Indoor Unit] When the main body 200 of the indoor unit 100 of the air conditioner 10 is attached to the mounting plate 300, the hook-shaped portion 333 inserted into the central insertion portion 212 faces the rear wall 214 and the central wall 213 in the front-to-rear direction of the main body 200. As described above, when the front of the main body 200 is lifted upward and the main body 200 is tilted, the lower end 213a of the central wall 213 abuts against the tip of the hook-shaped portion 333, restricting upward movement of the main body 200 beyond a set distance. When an operator rotates the main body 200 forward using the hook of the mounting plate 300 as a fulcrum, the upward movement of the main body 200 is restricted, and the main body 200 does not come off the mounting plate 300, thereby preventing the main body 200 from falling off the mounting plate 300.

[0102] Furthermore, when the front of the main body 200 is lifted upward and the main body 200 is tilted, the inclined wall portion 213d of the central wall portion 213 comes into contact with the inclined piece portion 334 of the hook-shaped portion 333, restricting the main body 200 from moving upward more than a set distance. When an operator rotates the main body 200 forward using the hook of the mounting plate 300 as a fulcrum, the upward movement of the main body 200 of the indoor unit 100 is restricted, and the main body 200 does not come off the mounting plate 300, preventing the main body 200 from falling off the mounting plate 300.

[0103] The indoor unit 100 has a hook formed by a central wall portion 213 with a hook-shaped lower end 213a at the center of the upper rear side of the rear case 210. The indoor unit 100 also has a protrusion 330 formed by drawing at the center of the upper part of the mounting plate 300, which extends toward the wall when attached to the wall and has a hook-shaped portion 333 with a tightly bent edge. When the main body 200 is tilted during installation to ensure a working space WS at the lower rear side of the main body 200, the hook-shaped portion of the central wall portion 213 hooks onto the hook-shaped portion 333 of the protrusion 330. Therefore, the indoor unit 100 can suppress upward movement of the main body 200 that occurs when the auxiliary installation supports 14 (see FIG. 15 ) used for installation are removed.

[0104] Furthermore, the central wall 213 of the main body 200 and the protruding portion 330 of the mounting plate 300 are hooked together, thereby restricting the rotation of the main body 200 in the vertical direction within a specific range. Therefore, the hook insertion portion 211 (see FIG. 11 ) of the main body 200 of the indoor unit 100 does not come off the upper support hook 310 (see FIG. 6 ) of the mounting plate 300, preventing the main body 200 from falling off the mounting plate 300.

[0105] Furthermore, in an indoor unit of an air conditioner that does not have the central insertion portion 212 and the protrusion 330, when the main body 200 is rotated forward, the worker may lift the main body 200 upward while pulling it forward, which may cause the main body 200 to shift forward. In the indoor unit 100 of the air conditioner 10, the central wall portion 213 of the main body 200 is hooked onto the hook portion 333 from the wall surface 400 side, preventing the main body 200 from shifting forward.

[0106] Furthermore, in the indoor unit 100 of the air conditioner 10, when the main body 200 attempts to shift forward, the inclined wall portion 213d of the central wall portion 213 and the inclined piece portion 334 of the hook-shaped portion 333 firmly interlock, making it difficult for the main body 200 to come off the mounting plate 300.

[0107] The protrusion 330 protrudes from the base member 305, and has a W-shaped cross section parallel to the plate surface of the base member 305. The cross section narrows from the base member 341 toward the tip member 342, and includes a bulge 331 formed integrally with the base member 305. The protrusion 330 protrudes from the base member 305, and has a cross section narrowing from the base member 341 toward the tip member 342, and includes a bulge 331 formed integrally with the base member 305. The protrusion 330 has a W-shaped cross section in the vertical direction (Z-axis direction) and the longitudinal direction (X-axis direction) of the mounting plate 300 due to the bulge 331. The protrusion 330 is also formed so that the shape of the protrusion 330 narrows from the base member 341, which is the base of the protrusion 330, toward the tip member 342 (see FIG. 10 ).

[0108] Due to the shape of the bulge portion 331, the protrusion 330 can increase its strength against loads or collisions from the up and down, left and right, and front and back directions, so that even if the main body portion 200 or the like collides with the protrusion 330, the protrusion 330 is less likely to deform and can maintain its shape.

[0109] Therefore, compared to when the protrusion 330 is easily deformed, the indoor unit 100 can prevent misalignment of the contact between the central wall portion 213 and the protrusion 330 when the main body portion 200 is tilted, thereby improving the function of preventing the main body portion 200 from coming off the mounting plate 300.

[0110] The inclined piece 334 of the hook-shaped portion 333 of the mounting plate 300 extends toward the wall surface 400, i.e., toward the back side (Y2 side) when the mounting plate 300 is attached to the wall surface 400. Compared to when the inclined piece 334 extends toward the front side (Y1) and protrudes forward, the main body 200 of the indoor unit 100 is less likely to collide with the inclined piece 334 when the main body 200 is attached to the mounting plate 300, and deformation of the hook-shaped portion 333 due to the collision of the main body 200 can be prevented.

[0111] Furthermore, when an operator attaches main body 200 to mounting plate 300, even if the vicinity of central wall 213 of rear case 210 hits mounting plate 300, it is likely that the hit will not be on hook-shaped portion 333, but on bulging portion 331 and tip wall portion 332, which have a larger volume than hook-shaped portion 333. Because bulging portion 331 and tip wall portion 332 are formed by high-strength drawing, protrusion 330 will not deform even if main body 200 hits bulging portion 331 and tip wall portion 332.

[0112] Furthermore, the tip wall 332 and hooked portion 333 of the protrusion 330 include a tightly bent portion 303 in which the outer edge portions are folded back in a short portion to tightly contact the plate surfaces. The tightly bent portion 303 is formed continuously from the tip wall 332 to the hooked portion 333. Because the hooked portion 333 and the tip wall 332 include the tightly bent portion 303, the protrusion 330 has a shape that is stronger than when the hooked portion 303 is not included.

[0113] Therefore, compared to when the protruding portion 330 is easily deformed, the indoor unit 100 can prevent misalignment of the contact between the central wall portion 213 and the protruding portion 330 when the main body portion 200 is tilted, and can improve the function of preventing the main body portion 200 from coming off the mounting plate 300. Note that cases in which the protruding portion 330 is easily deformed include, for example, when the close-contact bent portion 303 is not provided, when the close-contact bent portion 303 is provided but is interrupted, when the hook portion 333 is longer than the upper support hook 310, etc.

[0114] If the shape of the protrusion 330 is deformed, when the main body 200 moves upward to remove the auxiliary installation support 14 (see FIG. 15 ), the central wall 213 of the rear case 210 may not catch on the protrusion 330, which may result in the main body 200 not being prevented from coming off. Also, if the shape of the protrusion 330 is deformed, the deformed protrusion 330 may unintentionally catch on the central wall 213, which may prevent the main body 200 from coming off the mounting plate 300 when the indoor unit 100 is adjusted or relocated. Furthermore, if the shape of the protrusion 330 is deformed, it may be difficult to insert the hook portion 333 into the central insertion portion 212, which may reduce the ease of installation of the indoor unit 100.

[0115] As described above, the protruding portion 330 is less likely to deform and can maintain its shape due to the structure of the bulging portion 331 and the tightly bent portion 303, etc. Therefore, the indoor unit 100 can enhance the function of preventing the main body 200 from coming off the mounting plate 300 when the main body 200 is tilted, as the central wall 213 and the protruding portion 330 catch on each other. The indoor unit 100 is structured so that the main body 200 is less likely to come off the mounting plate 300 when the main body 200 is tilted, thereby improving safety. Furthermore, the structure of the bulging portion 331 and the tightly bent portion 303, etc. make the protruding portion 330 less likely to deform and can maintain its shape, so that a decrease in workability caused by deformation of the mounting plate 300 can be prevented during the installation of the indoor unit 100.

[0116] Figure 18 is an enlarged cross-sectional view of the arrangement portion of the protrusion 330 when the installation of the indoor unit 100 according to the embodiment is complete. Figure 19 is an enlarged cross-sectional view of the arrangement portion of the protrusion 330 when the main body 200 of the indoor unit 100 according to the embodiment is about to fall off. When the indoor unit 100 is installed on the wall surface 400, the upper support hook 310 of the mounting plate 300 hooks onto the hook insertion portion 211 to hold the main body 200 and always bears the weight of the main body 200.

[0117] 18 , when the main body 200 is attached to the mounting plate 300, the central wall 213 is disposed above the upper opening 330a of the bulging portion 331. When the indoor unit 100 is attached to the wall surface 400, the weight of the main body 200 is not normally applied to the protruding portion 330 of the mounting plate 300. In other words, when the indoor unit 100 is normally attached to the wall surface 400, the central insertion portion 212 of the main body 200 is not caught on the protruding portion 330 of the mounting plate 300.

[0118] However, plastic may crack or break when exposed to oil or chemicals. Such damage to plastic is called chemical cracking. The rear case 210 is often molded from a resin material such as plastic. Therefore, although the probability of this occurring is small, if the rear case 210 is made of a resin material, there is a risk of chemical cracking occurring in the rear case 210 if unintentional oil or chemicals adhere to the rear case 210.

[0119] The protrusion 330 of the mounting plate 300 is a backup hook onto which the main body 200 is caught when damage due to a chemical crack occurs in the hook insertion portion 211 of the rear case 210. When the main body 200 comes off the upper support hook 310 and is about to fall off, as shown in FIG. 19 , the central wall portion 213 of the main body 200 is inserted into the space S within the protrusion 330 and abuts against the upper surface portion 331c of the protrusion 330, and the main body 200 is caught on the protrusion 330. In other words, when the upper support hook 310 comes off the hook insertion portion 211, the central wall portion 213 is inserted into the inside of the bulge portion 331 through the upper opening 330a and abuts against the upper surface portion 331c, and is caught on the protrusion 330.

[0120] When the main body 200 comes off the upper support hook 310 and is about to fall off, the protrusion 330 of the mounting plate 300 hooks onto the central wall 213 to hold the main body 200 and bear the load of the main body 200. Even when the main body 200 comes off the upper support hook 310, the indoor unit 100 can prevent the main body 200 from falling off the mounting plate 300 because the protrusion 330 of the mounting plate 300 hooks onto the central wall 213 to hold the main body 200 and bear the load of the main body 200.

[0121] In the above description, the function of the protrusion 330 to support the main body 200 as a hook when a chemical crack occurs has been described. Even if the main body 200 comes off the upper support hook 310 due to insufficient engagement between the upper support hook 310 and the hook insertion portion 211 when an operator secures the main body 200 to the mounting plate 300, the indoor unit 100 can still perform the same function. That is, the protrusion 330 of the mounting plate 300 hooks onto the central wall portion 213 to hold the main body 200 and bear the load of the main body 200, preventing the main body 200 from falling off the mounting plate 300.

[0122] The protrusion 330 protrudes from the base material 305, and has a W-shaped cross section parallel to the plate surface of the base material 305, with the cross section tapering from the base 341 toward the tip 342, and has a bulging portion 331 formed integrally with the base material 305. Due to the shape of the bulging portion 331, the protrusion 330 can increase its strength against loads or collisions from the up and down, left and right, and front and back directions. Therefore, even if the main body 200 gets caught on the protrusion 330, the indoor unit 100 can hold the main body 200.

[0123] Fig. 20 is a front view of the indoor unit 100 according to the embodiment when a chemical crack has occurred in the rear case 210. Fig. 21 is a rear view of the indoor unit 100 according to the embodiment when a chemical crack has occurred in the rear case 210. Note that the dashed lines in Figs. 20 and 21 indicate horizontal. Using Figs. 20 and 21, we will explain how an abnormality is detected by the end user when a chemical crack has occurred.

[0124] As described above, the hook insertion portions 211 are provided at both ends of the main body 200 in the left-right direction perpendicular to the up-down direction, which is a direction along the plate surface of the base material 305. The central insertion portion 212 is provided at the center of the main body 200 in the left-right direction. Therefore, when damage due to chemical cracking occurs in the hook insertion portion 211 provided on the right or left side of the main body 200, the hook insertion portion 212 will hook on the protrusion 330 as shown in FIG. 19 when the main body 200 is tilted to the left or right as shown in FIGS. 20 and 21 .

[0125] As described above, the protruding portion 330 of the mounting plate 300 is provided forward and below the upper support hook 310 (see FIG. 9 ). As a result, if damage due to a chemical crack occurs in the hook insertion portion 211 provided on the right or left side of the main body 200, the main body 200 will be caught on the protruding portion 330 while tilted forward, as shown in FIG.

[0126] 20 and 21 , tilting the main body 200 of the indoor unit 100 to the left or right allows the end user to notice an abnormality in the indoor unit 100 and take action quickly, thereby preventing the main body 200 from falling off the mounting plate 300. Alternatively, tilting the main body 200 of the indoor unit 100 toward the front allows the end user to notice an abnormality in the indoor unit 100 and take action quickly, thereby preventing the main body 200 from falling off the mounting plate 300.

[0127] Furthermore, by including the indoor unit 100 according to the embodiment in the air conditioner 10, the air conditioner 10 can obtain the same effects as the indoor unit 100.

[0128] REFRIGERATION SYSTEM, 10 AIR CONDITIONER, 11 REFRIGERATOR PIPE, 12 CONNECTION EXTENSION PIPE, 12a FLARE NUT, 14 AUXILIARY INSTALLATION SUPPORT, 15 REFRIGERATOR CIRCUIT, 100 INDOOR UNIT, 110 BLOOD FAN, 120 HEAT EXCHANGER, 125 INDOOR CONNECTION PIPE, 125a UNION, 130 DRAIN PAN, 135 FLAPS, 140 ELECTRICAL COMPONENT BOX, 150 DISPLAY UNIT, 200 BODY PART, 200b RIBS, 200c OPENING PART, 201 SUPPLY PORTION, 202 OUTPUT PORTION, 203 AIR CHANNEL, 205 FRONT PART, 206 LOWER PART, 207 LOWER END OF BODY, 208 LOWER FRONT PART, 210 REAR CASE, 210a UPPER EDGE PART, 210c UPPER WALL PART, 211 HOOK INSERTION PART, 212 CENTRAL INSERTION PART, 213 CENTRAL WALL PART, 213a Lower end, 213b Side edge, 213c End rib, 213d Slanted wall, 214 Rear wall, 220 Design panel, 221 Front design panel, 230 Main body top, 300 Installation plate, 303 Closely bent portion, 305 Base portion, 305a Upper edge, 305b Lower edge, 310 Upper support hook, 311 hook base, 320 lower end of installation plate, 330 protrusion, 330a upper opening, 330a1 upper edge, 330b back side opening, 330b1 edge, 331 bulge, 331a first bulge, 331b second bulge, 331c upper surface, 332 tip wall, 333 Hook-shaped part, 334 Inclined piece part, 341 Base, 342 tip, 400 wall surface, 405 through-hole, 500 outdoor unit, 501 compressor, 502 flow path switching device, 503 outdoor heat exchanger, 504 expansion valve, 508 outdoor blower, S space, S1 main body space, S2 upper space, WS work space.

Claims

1. An installation plate fixed to a wall surface; a main body portion having a heat exchanger and a blower fan therein, the main body portion including a rear case attached to the mounting plate and constituting a box-shaped outer shell; Equipped with The mounting plate is A base portion formed in a flat plate shape and fixed to the wall surface; a protruding portion that is formed in a box shape protruding from the base portion toward the main body portion when the main body portion is attached to the mounting plate, and has a hook-shaped portion that protrudes upward at a tip end in a protruding direction; upper support hooks provided on both the left and right sides of the protrusion and higher than the protrusion, protruding upward from the base portion toward the main body when the main body is attached to the mounting plate, and for hanging the main body when the main body is attached to the mounting plate; having The rear case is a hook insertion portion into which the upper support hook is inserted and hooked onto the upper support hook when the main body is attached to the mounting plate; a central insertion portion into which the hook-shaped portion is inserted when the main body portion is attached to the mounting plate; having The central insertion portion is A rear wall portion forming a rear wall of the main body portion; a plate-like central wall portion provided outside the rear wall portion with a gap therebetween, protruding downward from an upper portion of the rear case, and having a hook-shaped lower end portion; Including, When the main body is attached to the mounting plate, the hook-shaped portion inserted into the central insertion portion faces the rear wall portion and the central wall portion in the front-to-rear direction of the main body, and when the front of the main body is lifted upward and the main body is tilted, the lower end portion of the central wall portion and the tip portion of the hook-shaped portion come into contact with each other, thereby restricting upward movement of the main body more than a set distance, The protrusion is a bulge portion that protrudes from the base portion, has a cross section parallel to a plate surface of the base portion that is W-shaped, and is formed so that the cross-sectional shape decreases from a base portion that is a root portion toward a tip portion, and is formed integrally with the base portion; a tip wall portion provided at a tip end of the protrusion, formed in a plate shape, and facing the rear wall portion when the main body portion is attached to the mounting plate; and The hook-shaped portion is The tip wall portion is provided at an upper portion of the tip wall portion, and includes an inclined piece portion at a tip end, the inclined piece portion being inclined with respect to the tip wall portion and extending upward and in a direction approaching the base portion, The central wall portion is The central wall portion has an inclined wall portion formed so as to protrude toward the rear wall portion as it moves from the upper portion to the lower portion, The inclined wall portion is a surface facing the rear wall portion is formed with an inclined surface facing upward and toward the rear wall portion, An indoor unit for an air conditioner in which, when the front of the main body is lifted upward and the main body is tilted, the inclined wall portion of the central wall portion and the inclined piece portion of the hook-shaped portion abut against each other, thereby restricting upward movement of the main body more than a set distance.

2. The tip wall portion and the hook-shaped portion are The plate includes a bent portion having a short outer edge portion folded back to bring the plate surface into close contact with the plate, The close-fitting bent shape portion is The indoor unit of an air conditioner according to claim 1, wherein the tip wall portion is formed continuously from the hook-shaped portion.

3. The bulging portion is an upper opening formed by an upper edge of the bulge and opening upward; an upper surface portion that is a plate-like portion extending from the base portion toward the tip wall portion, constitutes an apex portion of the central peak of the W-shape, and is formed inside the bulging portion below the upper opening; Including, When the main body is attached to the mounting plate, the central wall is disposed above the upper opening, 3. An indoor unit for an air conditioner as described in claim 1 or 2, wherein when the upper support hook comes off the hook insertion portion, the central wall portion is inserted into the inside of the bulge portion through the upper opening, abuts against the upper surface portion, and gets caught on the protrusion.

4. The hook insertion portion is The insulating film is provided at both ends of the main body in a left-right direction perpendicular to the up-down direction, the left-right direction being a direction along the plate surface of the base material, The central insertion portion is The indoor unit of an air conditioner according to claim 3 , wherein the cooling fan is provided at a center of the main body in the left-right direction.