Indoor unit of an 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

Technical Field

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

Background Art

[0002] In a conventional indoor unit of an air conditioner, a mounting plate is firmly installed on a wall with screws, and an insertion portion provided on the back side of the main body of the indoor unit and fitted with a hook is hooked on a hook provided at the upper part of the mounting plate, whereby it is installed on the wall (see, for example, Patent Document 1). Extension pipes, drain hoses, internal and external connection wirings, etc. connected to the indoor unit of the air conditioner are led from the outside to the inside of the room through through-holes provided in the wall.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the indoor unit of the air conditioner of Patent Document 1, when performing connection work of 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 to secure a working space at the lower part of the main body. Further, the indoor unit of the air conditioner rotates the main body forward around the hook of the mounting plate, and uses a mounting auxiliary support on the back of the main body of the indoor unit to secure a space between the main body and the mounting plate in order to maintain the working space, and the mounting auxiliary support may be removed after the completion of the connection work of the extension pipe or the like. In the indoor unit of the air conditioner of Patent Document 1, when the main body is rotated forward around the hook of the mounting plate during the connection work of the extension pipe or the like, the main body moves upward, the insertion portion of the main body comes off from the hook of the mounting plate, and the main body may fall off from the mounting plate.

[0005] This disclosure aims to solve the above-mentioned problems and provides an indoor unit for an air conditioner that prevents the main unit from falling off the mounting plate during a series of operations for mounting the main unit to the mounting plate. [Means for solving the problem]

[0006] The indoor unit of the air conditioner according to this disclosure comprises a mounting plate fixed to a wall surface, and a main body that has a heat exchanger and a blower fan inside and includes a rear case attached to the mounting plate, forming a box-shaped outer casing. The mounting plate is formed in a flat plate shape and includes a base material fixed to a wall surface, a box-shaped projection that protrudes from the base material toward the main body when the main body is attached to the mounting plate, and a hook-shaped projection that protrudes upward at the tip in the direction of protrusion, and upper support hooks provided above the projection on both the left and right sides of the projection, which protrude upward from the base material toward the main body when the main body is attached to the mounting plate, and which hook the main body when the main body is attached to the mounting plate. The rear case is mounted on the main body. The device has a hook insertion section into which an upper support hook is inserted and hooked when mounted on a plate, and a central insertion section into which a hook-shaped part is inserted when the main body is mounted on a mounting plate. The central insertion section includes a rear wall section that forms the rear wall of the main body, and a plate-shaped central wall section that is spaced apart from the rear wall section and provided outward from the rear wall section, protruding downward from the top of the rear case, with its lower end formed in the shape of a hook. When the main body is mounted on a mounting plate, the hook-shaped part inserted into the central insertion section faces the rear wall section and the central wall section in the front-to-back 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 of the central wall section and the tip of the hook-shaped part come into contact, restricting upward movement of the main body beyond a set distance. The main body has a protruding portion which extends from the base portion and has a W-shaped cross-section parallel to the plate surface of the base portion, with the cross-sectional shape decreasing from the base portion which is the root portion towards the tip portion, and further having a bulging portion which is integrally formed with the base portion and a tip wall portion which is provided at the tip of the protruding portion and is formed in a plate shape and faces the back wall portion when the main body is attached to the mounting plate, and a hook-shaped portion which is provided on the upper part of the tip wall portion and includes an inclined piece which is inclined with respect to the tip wall portion and extends upward and toward the base portion, and the central wall portion has an inclined wall portion which extends from the upper part to the lower part of the central wall portion toward the back wall portion, and the inclined wall portion which has an inclined surface which is upward and faces the back wall portion on the surface which faces the back wall portion, and when the front of the main body portion is lifted upward and the main body portion is tilted, the inclined wall portion of the central wall portion and the inclined piece portion of the hook-shaped portion come into contact, and upward movement of the main body portion beyond a set distance is restricted It is. [Effects of the Invention]

[0007] In the indoor unit of the air conditioner according to this disclosure, when the main body is attached to the mounting plate, the hook-shaped part inserted into the central insertion part faces the rear wall and the central wall in the front-to-back direction of the main body. When the front of the main body is lifted upward and the main body is tilted, the lower end of the central wall and the tip of the hook-shaped part come into contact, restricting upward movement of the main body beyond a set distance. When an operator rotates the main body forward using the hook on the mounting plate as a pivot point, upward movement of the main body is restricted, preventing the main body from coming off the mounting plate, thus preventing the main body from falling off the mounting plate. [Brief explanation of the drawing]

[0008] [Figure 1] This is a conceptual diagram showing the configuration of the refrigerant circuit of an air conditioner according to an embodiment. [Figure 2] This is a conceptual diagram of an air conditioner according to an embodiment. [Figure 3] This is a perspective view of the indoor unit of an air conditioner according to an embodiment. [Figure 4] This is a conceptual diagram showing the inside of the indoor unit of an air conditioner according to an embodiment. [Figure 5] This is an exploded perspective view of the indoor unit of an air conditioner according to an embodiment. [Figure 6] This is a conceptual diagram showing an example of an indoor unit mounting plate according to the embodiment. [Figure 7] This is a front view showing an example of a mounting plate for an indoor unit according to the embodiment. [Figure 8] This is a side view showing an example of a mounting plate for an indoor unit according to the embodiment. [Figure 9] This is an enlarged view showing the side view of the protruding portion of the mounting plate in the indoor unit according to the embodiment. [Figure 10] This is a perspective view of the protruding portion of the mounting plate in the indoor unit according to the embodiment. [Figure 11] This is a downward perspective view of the rear case of the indoor unit according to the embodiment. [Figure 12] This is an enlarged perspective view of the central insertion portion of the indoor unit according to the embodiment. [Figure 13] It is a conceptual diagram of a cross-section in the vertical and front-rear directions of a central insertion part in an indoor unit according to an embodiment. [Figure 14] It is a perspective view of an indoor unit in a working state of pipe connection after installation of the indoor unit according to an embodiment. [Figure 15] It is a cross-sectional view of an indoor unit in a working state of pipe connection according to an embodiment. [Figure 16] It is an enlarged cross-sectional view of an arrangement part of a protrusion in a working state of pipe connection of an indoor unit according to an embodiment. [Figure 17] It is an enlarged perspective cross-sectional view of an arrangement part of a protrusion in a working state of pipe connection of an indoor unit according to an embodiment. [Figure 18] It is an enlarged cross-sectional view of an arrangement part of a protrusion in a completed installation state of an indoor unit according to an embodiment. [Figure 19] It is an enlarged cross-sectional view of an arrangement part of a protrusion when the main body part of an indoor unit according to an embodiment is about to fall off. [Figure 20] It is a front view when a chemical crack occurs in a back case of an indoor unit according to an embodiment. [Figure 21] It is a rear view when a chemical crack occurs in a back case of an indoor unit according to an embodiment.

Mode for Carrying Out the Invention

[0009] Hereinafter, the indoor unit of an air conditioner according to an embodiment will be described with reference to the drawings and the like. In the following drawings including FIG. 1, the relative dimensional relationships and shapes of each component may be different from the actual ones. Also, in the following drawings, those with the same reference numerals are the same or corresponding ones, and this shall be common throughout the entire specification. In addition, terms indicating directions (for example, up, down, right, left, front, rear, etc.) are appropriately used for easy understanding, but their notations are only for the convenience of explanation and do not limit the arrangement and 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 the embodiment. The air conditioner 10 will be described using FIGS. 1 and 2. The air conditioner 10 performs air conditioning by heating or cooling a room by transferring heat between the outside air and the indoor air via a refrigerant. The air conditioner 10 includes an outdoor unit 500 and an indoor unit 100.

[0011] In the air conditioner 10, the outdoor unit 500 and the indoor unit 100 are connected by a refrigerant pipe 11, and a refrigerant circuit 15 through which the refrigerant circulates is formed. 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 sequentially connected via the refrigerant pipe 11. Note that the air conditioner 10 may not have the flow path switching device 502.

[0012] The refrigerant pipe 11 connecting the outdoor unit 500 and the indoor unit 100 is housed inside a connection extension pipe 12. When the indoor unit 100 and the outdoor unit 500 of the air conditioner 10 are pipe-connected using the connection extension pipe 12, the refrigerant circulates inside the refrigerant pipe 11 during the operation of the air conditioner 10.

[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 inhaled refrigerant. 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 realize a heating operation or a cooling operation by switching the refrigerant flow using the flow path switching device 502 based on an instruction from a control device (not shown).

[0014] The outdoor heat exchanger 503 performs heat exchange 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. An outdoor fan 508 is provided with the outdoor heat exchanger 503 to improve 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 adjusts the pressure of the refrigerant by changing the opening degree.

[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 inside 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. In the following drawings, including Figure 3, the X-axis 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-and-down direction of the indoor unit 100.

[0016] When viewing the indoor unit 100 from the front, the X1 side is the left side and the X2 side is the right side; along the Y axis, the Y1 side is the front side and the Y2 side is the rear side or back side; along the Z axis, the Z1 side is the top side or top side and the Z2 side is the bottom side. Furthermore, the positional relationships between each component in this specification (e.g., up and down relationships) 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 installed, for example, on the wall 400 of a room to provide air conditioning for the room. 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 which has an intake port 201 for drawing in indoor air and an outlet port 202 for supplying conditioned air to the area to be air-conditioned. The indoor unit 100 also has a mounting plate 300 which is fixed to the wall 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 a heat exchanger 120 and a blower fan 110 inside, and includes a rear case 210 that is attached to the mounting plate 300, forming a box-shaped outer casing. More specifically, the main body 200 has a rear case 210, a decorative panel 220, and a main body top surface 230. The main body 200, with the rear case 210, the decorative panel 220, and the main body top surface 230 combined, forms the outer casing of the indoor unit 100. The main body 200, with the rear case 210, the decorative panel 220, and the main body top surface 230 combined, forms a box-shaped housing.

[0019] The rear case 210 constitutes at least the rear outer wall 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 part of the mounting plate 300. In the front-to-back direction (Y-axis direction) of the main body 200, the portion of the rear case 210 opposite the mounting plate 300 is fitted with a blower fan 110, a heat exchanger 120, a drain pan 130, an electrical box 140, a sensor, and a display unit 150, which will be described later. The detailed configuration of the rear case 210 will be described later.

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

[0021] The design panel 220 constitutes the outer wall on the side, front, and bottom of the main body 200. The design panel 220 also constitutes a part of the top wall of the main body 200. The design panel 220 constitutes the air outlet 202 through which air is blown from the inside of the main body 200 to the outside. Furthermore, 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 constitutes the outer wall on the front side of the main body 200 and forms the design surface on the front side. 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 shafts 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 Figure 4, the main body 200 has an intake port 201 formed on the upper surface 230 of the main body 200, and an outlet port 202 formed below the intake port 201. In the indoor unit 100, the outlet port 202 is formed on the lower part of the front surface 205 of the main body 200 and on the front side of the lower surface 206 of the main body 200.

[0024] The outlet 202 is equipped with a flap 135 that opens and closes the outlet 202 and adjusts the direction of the air conditioned in the heat exchanger 120 (hereinafter referred to as "conditioned air"), which will be described later. This flap 135 adjusts the direction of the conditioned air to the left and right and up and down. The flap 135 is provided, for example, on the lower side of the drain pan 130.

[0025] The main unit 200 includes a blower fan 110, a heat exchanger 120, a drain pan 130, an electrical box 140, a sensor, and a display unit 150. Inside the main unit 200, as shown in Figures 4 and 5, the blower fan 110, heat exchanger 120, drain pan 130, electrical box 140, sensor, and display unit 150 are arranged.

[0026] The blower fan 110 is, for example, a cross-flow fan and forms an airflow. The blower fan 110 takes in air from the intake port 201 of the main body 200 and performs heat exchange between the taken-in air and the refrigerant flowing inside the heat exchanger 120, and blows out the conditioned air after heat exchange from the outlet 202 of the main body 200. The blower fan 110 is mounted on the rear case 210 and is positioned downstream of the heat exchanger 120 in the air passage 203 from the intake port 201 to the outlet 202.

[0027] The heat exchanger 120 performs heat exchange 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 inside of the main body 200 into the air-conditioned space. During heating operation, the heat exchanger 120 functions as a condenser, condensing and liquefying the refrigerant. During cooling operation, the heat exchanger 120 functions as an evaporator, evaporating and vaporizing the refrigerant.

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

[0029] The drain pan 130 is located below the heat exchanger 120 within the main body 200 and collects the drain water dripping from the heat exchanger 120. The drain water collected in the drain pan 130 is guided to the outside by a drainage mechanism (not shown in the diagram). The flap 135 described above is provided on the lower side of the drain pan 130. The electrical box 140 houses the circuit components and other devices 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) Figure 6 is a conceptual diagram showing an example of a mounting plate 300 for the indoor unit 100 according to the embodiment. Figure 7 is a front view showing an example of a mounting plate 300 for the indoor unit 100 according to the embodiment. Figure 8 is a side view showing an example of a mounting plate 300 for the indoor unit 100 according to the embodiment. The dotted cords in Figures 6 to 8 indicate the configuration of the back side of the plate surface. The mounting plate 300 will be explained using Figures 6 to 8.

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

[0032] The mounting plate 300 is made of a roughly rectangular metal plate and is fixed to the interior wall surface 400 with fasteners such as screws, bolts, or nails. As shown in Figure 7, the mounting plate 300 comprises a base material portion 305, a plurality of upper support hooks 310, a lower mounting plate end portion 320, and a protruding portion 330.

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

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

[0035] The upper support hook 310 is the part that the main body 200 is hooked onto and supports the main body 200. The upper support hook 310 is formed so that the hook insertion part 211 (see Figure 11) provided on the upper back of the back case 210 is hooked onto it.

[0036] The upper support hook 310 is provided on the upper edge 305a of the base material 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 material 305.

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

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

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

[0040] Figure 9 is an enlarged view showing a side view of the protruding portion 330 of the mounting plate 300 in the indoor unit 100 according to the embodiment. Figure 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 reference numerals in Figures 9 and 10 indicate the configuration of the back side of the plate surface. The protruding portion 330 will be explained using Figures 7 to 10.

[0041] The protruding portion 330 restricts the vertical rotation of the main body 200 to a specific range when installing the indoor unit 100. Furthermore, the protruding portion 330, together with the central insertion portion 212, prevents the main body 200 from moving upward when installing the indoor unit 100. Additionally, the protruding portion 330 prevents the main body 200 from falling if the rear case 210 detaches from the upper support hook 310.

[0042] The protruding portion 330 is formed to protrude from the base material portion 305 toward the rear case 210. That is, the protruding portion 330 is formed to protrude from the plate surface of the base material portion 305 on the side facing the rear case 210. The protruding portion 330 is formed by a drawing process and is connected to the base material portion 305 of the mounting plate 300 fixed to the wall surface 400, and has a shape that is integrated with the base material portion 305, resulting in a shape with high strength. Because the protruding portion 330 is formed by a drawing process, the plate thickness of the protruding portion 330 is approximately the same as the plate thickness of the base material portion 305.

[0043] As shown in Figure 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 central part of the base material 305 in the longitudinal direction (X-axis direction) of the base material 305. Also, as shown in Figure 9, the protrusion 330 is formed below the upper support hook 310. The protrusion 330 of the mounting plate 300 is located in front of and below the upper support hook 310.

[0044] As shown in Figure 10, the protrusion 330 is formed such that its shape decreases from the base 341, which is the root portion of the protrusion 330, towards the tip 342. The shape of the protrusion 330 is smaller at the tip 342 than at the base 341. The shape of the protrusion 330 decreases so that the lower and side portions converge towards the center as it moves from the base 341 to the tip 342.

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

[0046] The protruding portion 330 has an upper opening 330a at the upper edge portion 330a1, which is the upper edge portion of the protruding portion 330, and a rear opening 330b at the edge portion 330b1 on the wall surface 400 side. The upper opening 330a opens upward, and the rear opening 330b opens in the rear direction, that is, in the direction opposite to the direction in which the protruding portion 330 protrudes.

[0047] As shown in Figure 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] As shown in Figure 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 integrally formed with the base material portion 305 and the protruding portion 330 by a drawing process. That is, the mounting plate 300 is integrally formed with the base material portion 305, the bulging portion 331, the tip wall portion 332, and the hook-shaped portion 333.

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

[0050] The bulging portion 331 has a W-shaped cross-section in the direction along the plate surface of the base material portion 305, that is, in 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 material portion 305, and the cross-section parallel to the plate surface of the base material portion 305 is formed in a W-shape.

[0051] The bulge 331 is formed such that its cross-sectional shape decreases as it moves from the base 341 to the tip 342 of the protruding portion 330, and it is formed integrally with the base material 305. The shape of the bulge 331 is smaller at the tip 342 than at the base 341 of the protruding portion 330. The shape of the bulge 331 decreases as it moves from the base 341 to the tip 342 of the protruding portion 330, with the lower and side portions converging towards the center.

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

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

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

[0055] The upper surface portion 331c is the bottom portion of the part that is recessed upward between the first bulge portion 331a and the second bulge portion 331b when viewed from the side where the main body portion 200 is positioned. The upper surface portion 331c is the top surface portion of the part that is projecting upward between the first bulge portion 331a and the second bulge 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 protruding portion 330. The upper surface portion 331c is inclined with respect to the plate surface of the base material portion 305, and the inner surface of the protruding portion 330 is inclined to face upward and backward. If the rear case 210 detaches from the upper support hook 310, the upper surface portion 331c will come into contact with the central wall portion 213 (see Figure 12) of the rear case 210, preventing the main body portion 200 from falling.

[0057] The tip wall portion 332 is a wall portion provided at the tip portion 342 of the protruding portion 330. The tip wall portion 332 is formed in a plate shape. When the main body portion 200 is attached to the mounting plate 300, the tip wall portion 332 faces the rear wall portion 214 of the main body portion 200, which will be described later. The tip wall portion 332 may be formed parallel to the direction in which the base material portion 305 extends, and the upper part of the tip wall portion 332 may be inclined toward the rear case 210 side.

[0058] The upper part of the tip wall portion 332 is provided with a hook-shaped portion 333 that is integrally formed with the tip wall portion 332. The protruding portion 330 is formed in a box shape that protrudes from the base material 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 portion 333 that protrudes upward at the tip in the direction of protrusion.

[0059] The hook-shaped portion 333 is inserted into the central insertion portion 212 (see Figure 11) of the rear case 210, which will be described later, when the main body portion 200 is attached to the mounting plate 300. The hook-shaped portion 333, together with the central insertion portion 212, prevents the main body portion 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 material portion 305 and to extend upward from the tip wall portion 332. In a side view along the longitudinal direction (X-axis direction) of the base material portion 305, the hook-shaped portion 333 is formed in a hook shape.

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

[0062] The inclined piece portion 334 is formed 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 an inclined piece portion 334 at its tip that is inclined with respect to the tip wall portion 332 and extends upward and toward the base material 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, for example by hemming bending. The tightly bent portion 303 is a portion in which the outer edges of the hook-shaped portion 333 and the tip wall portion 332 are folded back to a short length, causing the plate surfaces to be in close contact.

[0064] The tightly bent portion 303 is integrally formed in the hook-shaped portion 333 and the tip wall portion 332. The tightly bent portion 303 is formed in a continuous manner from the tip wall portion 332 to the hook-shaped portion 333. The tightly bent portion 303 is formed over the entire hook-shaped 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. Also, 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 position of the tip of the inclined piece portion 334 is below the upper edge 305a of the mounting plate 300. That is, 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 hook-shaped portion 333 of the upper support hook 310 and protruding portion 330 of the mounting plate 300, and the hook insertion portion 211 and central insertion portion 212 of the rear case 210 are in a blind spot from the perspective of the installer, making it difficult to determine their position. Therefore, if the hook-shaped portion 333 is longer than the upper support hook 310, the area near the central insertion portion 212 of the rear case 210 is more likely to come into contact with the hook-shaped portion 333, potentially causing deformation of the hook-shaped portion 333.

[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 operator being conscious of inserting the upper support hook 310 into the hook insertion portion 211, the indoor unit 100 can prevent deformation of the hook-shaped portion 333 by making it less likely for the hook-shaped portion 333 to come into contact with the central insertion portion 212, compared to the case where the hook-shaped portion 333 is longer than the upper support hook 310.

[0068] (Details of the back case 210) Figure 11 is a downward perspective view of the rear case 210 of 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 the part into which the upper support hook 310 of the mounting plate 300 is inserted and hooked when the main body portion 200 is attached to the mounting plate 300. The upper edge portion 210a on the rear side of the rear case 210 has a hook insertion portion 211 formed therein, which is used 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, which is provided on the upper rear 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, and the main body 200 is supported by the mounting plate 300.

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

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

[0073] The central insertion portion 212 is configured to allow the protruding portion 330 of the mounting plate 300 to be inserted. More specifically, the central insertion portion 212 is configured to allow the hook-shaped portion 333 of the protruding portion 330 to be inserted when the main body portion 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 located in 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 located in the center of the main body portion 200 in the left-right direction perpendicular to the vertical direction, along the plate surface of the base material portion 305.

[0074] The central insertion portion 212, together with the protruding portion 330, restricts the vertical rotation of the main body portion 200 to a specific range when installing the indoor unit 100. The central insertion portion 212, together with the protruding portion 330, also prevents the main body portion 200 from moving upward when installing the indoor unit 100. Furthermore, the central insertion portion 212, together with the protruding portion 330, prevents the main body portion 200 from falling if the rear case 210 detaches from the upper support hook 310.

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

[0076] Figure 12 is an enlarged perspective view of the central insertion portion 212 in the indoor unit 100 according to the embodiment. Figure 13 is a conceptual diagram of the vertical and horizontal 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 Figures 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 composed of a part of the rear wall portion 214 and the central wall portion 213.

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

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

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

[0080] As described above, the central wall portion 213 is provided on the outside of the rear wall portion 214, with a gap between it and the rear wall portion 214, and protrudes downward from the top of the rear case 210, with its lower end portion 213a formed in a hook shape. Note that "outside of the rear wall portion 214" means the opposite side from "inside of the rear wall portion 214" when the space housing the heat exchanger 120 etc. is considered to be inside the main body portion 200 relative to the rear wall portion 214.

[0081] The central wall portion 213 is formed in the shape of a rectangular plate. The upper part of the central wall portion 213 is integrally formed and fixed with the upper part of the rear case 210, while the lower part is an unfixed free end. The upper part of the central wall portion 213 extends upward and is formed flush with the upper wall portion 210c of the rear case 210. The upper wall portion 210c is a wall portion that extends above the central wall portion 213.

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

[0083] The central wall portion 213 has a side edge portion 213b extending downward from the rib 200b and a lower end portion 213a which is a free end. The side edge portion 213b and the lower end portion 213a are provided with end ribs 213c that extend in the front-rear direction (Y-axis direction) of the rear case 210 and have thickness. The end ribs 213c are formed integrally with the rib 200b. The central wall portion 213 can be made stronger by providing end ribs 213c on the side edge portion 213b and the lower end portion 213a compared to a case where end ribs 213c are not present.

[0084] As shown in Figure 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 facing the rear wall portion 214, and protrudes at the lower end portion 213a so as to approach the rear wall portion 214.

[0085] The inclined wall portion 213d forms an inclined surface on the central wall portion 213 facing the rear wall portion 214. The inclined wall portion 213d is formed to protrude toward the rear wall portion 214 as it moves from the top to the bottom of the central wall portion 213. The inclined wall portion 213d forms an inclined surface on the surface facing the rear wall portion 214 that is 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 integrally formed with the central wall portion 213. The opening 200c is a hole that penetrates the rib 200b in the vertical direction. Therefore, the rear case 210 is formed so that the upper space S2 above the rib 200b and the main body space S1, which is the space between the central wall portion 213 and the rear wall portion 214, are in communication.

[0087] [Securing the main body 200 to the mounting plate 300] The mounting plate 300 is installed on the wall (see Figure 6). The mounting plate 300 is firmly fixed to the wall surface 400 by fastening 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 unit 200 to the mounting plate 300, the worker hooks the hook insertion part 211 (see Figure 11) located on the upper rear of the main unit 200 onto the upper support hook 310 (see Figure 6) of the mounting plate 300. Next, using the upper support hook 310 as a pivot point, the worker rotates the main unit 200 (see Figure 2) while pushing the lower part of the main unit 200 toward the mounting plate 300, thereby fixing the main unit 200 to the mounting plate 300. As a result, the main unit 200 is fixed to the mounting plate 300, and the indoor unit 100 is installed on the wall surface 400.

[0089] [Piping connection work for indoor unit 100] Figure 14 is a perspective view of the indoor unit 100 in the state of piping connection work after installation according to the embodiment. Figure 15 is a cross-sectional view of the indoor unit 100 in the state of piping connection work according to the embodiment. Figure 15 is a cross-section of the main body 200 in the front-rear 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 part 212. Using Figures 14 and 15, the installation procedure for connecting the piping of the indoor unit 100 when the indoor unit 100 is attached to the mounting plate 300, such as when it is already installed or being relocated, is shown.

[0090] The connecting extension pipe 12 is routed from the outside to the inside of the room through a through hole 405 provided in the wall. One end of the connecting extension pipe 12 is connected to the outdoor unit 500, and the other end is connected to the indoor unit 100 (see Figure 2). In addition, the drain hose and the indoor-outdoor connecting wiring (not shown) that connects the indoor unit 100 and the outdoor unit 500 are also routed from the outside to the inside of the room through a through hole 405 provided in the wall.

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

[0092] The worker uses the base of the hook 311 (see Figure 8) of the upper support hook 310 as a pivot point and, as shown in Figure 15, lifts the main body 200 while rotating the lower end 207 of the main body 200 forward, thereby tilting the main body 200. The worker uses the base of the hook 311 (see Figure 8) as a pivot point and tilts the main body 200 so that the front part of the main body 200 is higher than the rear part, thereby securing a working space WS between the main body 200 and the mounting plate 300.

[0093] As shown in Figure 15, the main body 200 is tilted to secure the workspace WS, and in order to maintain the tilt of the main body 200, the worker inserts the mounting support column 14 between the mounting plate 300 and the rear case 210 of the main body 200, and supports the main body 200 with the mounting support column 14.

[0094] The mounting support column 14 is sandwiched between the main body 200 and the mounting plate 300, maintaining the working space WS. For example, a packaging box for packing the indoor unit 100 can be used as the mounting support column 14. The mounting support column 14 is not limited to a packaging box; any columnar or rod-shaped object that can support the main body 200 is acceptable.

[0095] After the piping connection work is completed, the worker needs to slightly lift the lower end 207 of the main body 200 again to widen the working space WS a little in order to remove the mounting support column 14 which is sandwiched between the main body 200 and the mounting plate 300. At this time, if the worker lifts the main body 200 while holding down the lower front 208 of the main body 200, the entire main body 200 tends to move upward (towards Z1). Therefore, in indoor units of air conditioners that do not have a central insertion part 212 and a protruding part 330, the hook insertion part 211 of the main body 200 (see Figure 11) may come off the upper support hook 310 of the mounting plate 300 (see Figure 6), and the main body 200 may fall off the mounting plate 300.

[0096] Figure 16 is an enlarged cross-sectional view of the arrangement of the protruding portion 330 in the working state of pipe connection of the indoor unit 100 according to the embodiment. Figure 17 is an enlarged perspective cross-sectional view of the arrangement of the protruding portion 330 in the working state of pipe connection of the indoor unit 100 according to the embodiment. The mechanism of the indoor unit 100 that prevents the main body 200 from falling off the mounting plate 300 will be described using Figures 16 and 17.

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

[0098] As shown in Figures 16 and 17, the worker rotates the main body 200 using the hook base 311 (see Figure 8) as a pivot point at the start and end of the piping connection work, thereby tilting the main body 200. In this state, the indoor unit 100 is caught by the contact between 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 hook 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 and the tip of the hook-shaped part 333 come into contact, restricting upward movement of the main body 200 beyond 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 and the inclined piece 334 of the hook-shaped part 333 come into contact, restricting upward movement of the main body 200 beyond a set distance.

[0100] The central wall portion 213 of the main body portion 200 and the protruding portion 330 of the mounting plate 300 catch on each other, preventing the main body portion 200 from moving upward. As a result, the hook insertion portion 211 (see Figure 11) of the main body portion 200 does not come off the upper support hook 310 (see Figure 6) of the mounting plate 300, thus preventing the main body portion 200 from falling off the mounting plate 300.

[0101] [Effects and benefits of the indoor unit of an air conditioner] In the indoor unit 100 of the air conditioner 10, when the main body 200 is attached to the mounting plate 300, the hook-shaped portion 333 inserted into the central insertion portion 212 faces the rear wall portion 214 and the central wall portion 213 in the front-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 portion 213a of the central wall portion 213 and the tip of the hook-shaped portion 333 come into contact, restricting upward movement of the main body 200 beyond a set distance. In the indoor unit 100, when an operator rotates the main body 200 forward using the hook of the mounting plate 300 as a pivot point, upward movement of the main body 200 is restricted, and the main body 200 does not come off the mounting plate 300, thus preventing the main body 200 from falling off the mounting plate 300.

[0102] Furthermore, when the front of the main body 200 of the indoor unit 100 is lifted upward and the main body 200 is tilted, the inclined wall portion 213d of the central wall portion 213 and the inclined piece portion 334 of the hook-shaped portion 333 come into contact, 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 pivot point, upward movement of the main body 200 is restricted, preventing the main body 200 from detaching from the mounting plate 300, thus preventing the main body 200 from falling off the mounting plate 300.

[0103] The indoor unit 100 has a hook at the center of the upper rear side of the rear case 210, consisting of a central wall portion 213 whose lower end 213a is formed in a hook shape. The indoor unit 100 also has a projection 330 formed by drawing at the center of the upper part of the mounting plate 300, which extends toward the wall when mounted on a wall and has a hook-shaped portion 333 whose edge is formed by tight bending. When the main body 200 is tilted to secure a working space WS at the lower rear side of the main body 200 during installation, the hook shape of the central wall portion 213 catches on the hook-shaped portion 333 of the projection 330. Therefore, the indoor unit 100 can suppress the upward movement of the main body 200 that occurs when the mounting support column 14 (see Figure 15) used for installation is removed.

[0104] Furthermore, the central wall portion 213 of the main body portion 200 and the protruding portion 330 of the mounting plate 300 interlock, thereby restricting the rotation of the main body portion 200 in the vertical direction to a specific range. As a result, the hook insertion portion 211 (see Figure 11) of the main body portion 200 does not come off the upper support hook 310 (see Figure 6) of the mounting plate 300, preventing the main body portion 200 from falling off the mounting plate 300.

[0105] Furthermore, in indoor units of air conditioners that do not have a central insertion portion 212 and a protruding portion 330, when the main body portion 200 is rotated forward, the operator may pull the main body portion 200 forward and lift it upward, which can cause the main body portion 200 to shift forward. In the indoor unit 100 of the air conditioner 10, the central wall portion 213 of the main body portion 200 catches on the hook-shaped portion 333 from the wall surface 400 side, thus preventing the main body portion 200 from shifting forward.

[0106] Furthermore, in the indoor unit 100 of the air conditioner 10, if the main body 200 tries 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 detach from the mounting plate 300.

[0107] The protruding portion 330 protrudes from the base portion 305, and its cross-section parallel to the plate surface of the base portion 305 is formed in a W shape. The cross-sectional shape is formed to decrease from the base portion 341 towards the tip portion 342, and it has a bulge portion 331 that is integrally formed with the base portion 305. The protruding portion 330 protrudes from the base portion 305, and its cross-sectional area is formed to decrease from the base portion 341 towards the tip portion 342, and it has a bulge portion 331 that is integrally formed with the base portion 305. Because the protruding portion 330 has a bulge portion 331, the cross-section of the mounting plate 300 in the vertical direction (Z-axis direction) and the longitudinal direction (X-axis direction) is formed in a W shape. In addition, the shape of the protruding portion 330 is formed to decrease from the base portion 341, which is the root of the protruding portion 330, towards the tip portion 342 (see Figure 10).

[0108] Due to the shape of the bulging portion 331, the protruding portion 330 can be made stronger against loads or collisions from the up, down, left, right, and front and back directions. For example, even if the main body portion 200 collides with the protruding portion 330, the protruding portion 330 is less likely to deform and can maintain its shape.

[0109] Therefore, compared to the case where 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 enhance 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 rear side (Y2 side), when the mounting plate 300 is attached to the wall surface 400. Compared to the case where the inclined piece 334 extends toward the front side (Y1 side) and protrudes forward, 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 collision with the main body 200 can be prevented.

[0111] Furthermore, when an operator attaches the main body 200 to the mounting plate 300, even if the area near the central wall 213 of the rear case 210 hits the mounting plate 300, it is more likely to hit the bulging portion 331 and the tip wall portion 332, which occupy a larger volume than the hook-shaped portion 333, rather than the hook-shaped portion 333. Since the bulging portion 331 and the tip wall portion 332 are formed by a high-strength drawing process, the protruding portion 330 will not deform even if the main body 200 hits the bulging portion 331 and the tip wall portion 332.

[0112] Furthermore, the tip wall portion 332 and the hook-shaped portion 333 of the protruding portion 330 include a tightly bent shape portion 303 in which the outer edge portion is folded back to a short length and the plate surface is brought into close contact. The tightly bent shape portion 303 is formed in a continuous manner from the tip wall portion 332 to the hook-shaped portion 333. Because the hook-shaped portion 333 and the tip wall portion 332 include the tightly bent shape portion 303, the protruding portion 330 has a shape that provides greater strength compared to a case where the tightly bent shape portion 303 is not included.

[0113] Therefore, compared to the case where 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 enhance the function of preventing the main body portion 200 from coming off the mounting plate 300. Cases in which the protruding portion 330 is easily deformed include, for example, when the tightly bent shape portion 303 is not provided, when the tightly bent shape portion 303 is provided but is interrupted in the middle, or when the hook-shaped portion 333 is longer than the upper support hook 310.

[0114] Furthermore, if the shape of the protruding portion 330 deforms, when the main body 200 moves upward when the mounting support column 14 (see Figure 15) is removed, the central wall portion 213 of the rear case 210 may not catch on the protruding portion 330, and the mechanism to prevent the main body 200 from coming off may not function. Also, if the shape of the protruding portion 330 deforms, the deformed protruding portion 330 may unintentionally catch on the central wall portion 213, making it impossible to remove the main body 200 from the mounting plate 300 when making adjustments to or relocating the indoor unit 100. In addition, if the shape of the protruding portion 330 deforms, it becomes difficult to insert the hook-shaped portion 333 into the central insertion portion 212, reducing the ease of installation of the indoor unit 100.

[0115] As described above, the protruding portion 330 is resistant to deformation and maintains its shape due to the structure of the bulging portion 331 and the tightly bent shape portion 303. Therefore, the indoor unit 100 can enhance its function of preventing the main body portion 200 from detaching from the mounting plate 300 by having the central wall portion 213 and the protruding portion 330 catch on when the main body portion 200 is tilted. The indoor unit 100 has a structure that makes it difficult for the main body portion 200 to detach from the mounting plate 300 when the main body portion 200 is tilted, thus enhancing safety. In addition, because the protruding portion 330 is resistant to deformation and maintains its shape due to the structure of the bulging portion 331 and the tightly bent shape portion 303, 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 of the protruding portion 330 in the completed installation state of the indoor unit 100 according to the embodiment. Figure 19 is an enlarged cross-sectional view of the arrangement of the protruding portion 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 holds the main body 200 by hooking the hook insertion portion 211 and is always bearing the load of the main body 200.

[0117] As shown in Figure 18, when the main body 200 is attached to the mounting plate 300, the central wall portion 213 is positioned above the upper opening 330a of the bulging portion 331. When the indoor unit 100 is installed on the wall surface 400, under normal circumstances, the load of the main body 200 is not applied to the protruding portion 330 of the mounting plate 300. That is, under normal circumstances when the indoor unit 100 is installed on 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] Incidentally, plastics can crack or break when they react with oils or chemicals. This type of plastic damage is called a chemical crack. The back case 210 is often molded from plastic or other resin materials. Therefore, although the probability of it occurring is small, if the back case 210 is made of resin material, there is a risk that chemical cracks may occur in the back case 210 if unintended oils or chemicals adhere to it.

[0119] The protruding portion 330 of the mounting plate 300 is a backup hook that the main body 200 will catch on to when damage occurs to the hook insertion portion 211 of the rear case 210 due to a chemical crack. When the main body 200 becomes detached from the upper support hook 310 and is about to fall off, as shown in Figure 19, the central wall portion 213 of the main body 200 is inserted into the space S within the protruding portion 330, comes into contact with the upper surface portion 331c of the protruding portion 330, and the main body 200 catches on the protruding portion 330. In other words, when the upper support hook 310 becomes detached from the hook insertion portion 211, the central wall portion 213 is inserted into the bulging portion 331 through the upper opening 330a, comes into contact with the upper surface portion 331c, and catches on the protruding portion 330.

[0120] If the main body 200 detaches from the upper support hook 310 and the main body 200 is about to fall off, the protruding portion 330 of the mounting plate 300 will hook onto the central wall portion 213 to hold the main body 200 in place and bear the load of the main body 200. Even if the main body 200 detaches from the upper support hook 310, the indoor unit 100 can prevent the main body 200 from falling off the mounting plate 300 because the protruding portion 330 of the mounting plate 300 will hook onto the central wall portion 213 to hold the main body 200 in place and bear the load of the main body 200.

[0121] The above explanation described the function of the protruding portion 330 in supporting the main body portion 200 as a hook in the event of a chemical crack. Even if the main body portion 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 the worker fixes the main body portion 200 to the mounting plate 300, the indoor unit 100 can perform the same function. That is, the indoor unit 100 can prevent the main body portion 200 from falling off the mounting plate 300 because the protruding portion 330 of the mounting plate 300 hooks onto the central wall portion 213 to hold the main body portion 200 and bear the load of the main body portion 200.

[0122] The protruding portion 330 extends from the base portion 305, and its cross-section parallel to the plate surface of the base portion 305 is formed in a W shape. The cross-sectional shape is formed to narrow from the base portion 341 to the tip portion 342, and it has a bulging portion 331 that is integrally formed with the base portion 305. Due to the shape of the bulging portion 331, the protruding portion 330 can be made stronger against loads or collisions from the up and down, left and right, and front and back directions. Therefore, even if the main body portion 200 of the indoor unit 100 gets caught on the protruding portion 330, the protruding portion 330 can hold the main body portion 200.

[0123] Figure 20 is a front view of the indoor unit 100 in the case where a chemical crack occurs in the rear case 210 according to the embodiment. Figure 21 is a rear view of the indoor unit 100 in the case where a chemical crack occurs in the rear case 210 according to the embodiment. Note that the dashed lines in Figures 20 and 21 indicate horizontal lines. Using Figures 20 and 21, the end user's detection of abnormalities when a chemical crack occurs will be explained.

[0124] As described above, the hook insertion portion 211 is provided at both ends of the main body portion 200 in the left-right direction perpendicular to the vertical direction, along the plate surface of the base material portion 305. The central insertion portion 212 is provided in the center of the main body portion 200 in the left-right direction. Therefore, 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 portion 200, the main body portion 200 will tilt to the left or right as shown in Figures 20 and 21, and will catch on the protruding portion 330 as shown in Figure 19.

[0125] Furthermore, as described above, the protruding portion 330 of the mounting plate 300 is located in front of and below the upper support hook 310 (see Figure 9). As a result, if damage occurs due to a chemical crack in the hook insertion portion 211 located on the right or left side of the main body 200, the main body 200 will tilt forward and catch on the protruding portion 330, as shown in Figure 19.

[0126] As shown in Figures 20 and 21, if the main body 200 of the indoor unit 100 is tilted to the left or right, the end user can notice an abnormality in the indoor unit 100 and respond quickly, thereby preventing the main body 200 from falling off the mounting plate 300. Alternatively, if the main body 200 of the indoor unit 100 is tilted forward, the end user can notice an abnormality in the indoor unit 100 and respond quickly, thereby preventing the main body 200 from falling off the mounting plate 300.

[0127] Furthermore, by equipping the air conditioner 10 with the indoor unit 100 according to the embodiment, the air conditioner 10 can obtain the same effects as the indoor unit 100. [Explanation of Symbols]

[0128] 10 Air conditioner, 11 Refrigerant piping, 12 Connection extension piping, 12a Flare nut, 14 Installation support column, 15 Refrigerant circuit, 100 Indoor unit, 110 Blower fan, 120 Heat exchanger, 125 Indoor side connection piping, 125a Union, 130 Drain pan, 135 Flap, 140 Electrical box, 150 Display unit, 200 Main body, 200b Rib, 200c Opening, 201 Intake port, 202 Outlet port, 203 Air passage, 205 Front section, 206 Bottom section, 207 Lower end of main body, 208 Lower front section, 210 Rear case, 210a Upper edge section, 210c Upper wall section, 211 Hook insertion section, 212 Central insertion section, 213 Central wall section, 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 section, 305 Base material, 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 Bulb, 331a First bulge, 331b Second bulge, 331c Top surface, 332 Tip wall, 333 hook, 334 inclined piece, 341 Base, 342 Tip, 400 Wall, 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 Working space.

Claims

1. A mounting plate that is fixed to the wall, The main body, which has a heat exchanger and a blower fan inside and includes a rear case that is attached to the mounting plate, forms a box-shaped outer casing, Equipped with, The aforementioned mounting plate is, It is formed in a flat plate shape and has a base material portion that is fixed to the wall surface, In the state in which the main body is attached to the mounting plate, the protruding part is formed in a box shape that protrudes from the base material toward the main body, and has a hook-shaped portion that protrudes upward at the tip in the direction of protrusion, An upper support hook is provided on both the left and right sides of the aforementioned protrusion, above the aforementioned protrusion, and protrudes upward from the base material toward the aforementioned main body when the main body is attached to the mounting plate, and hooks onto the main body when the main body is attached to the mounting plate. It has, The aforementioned back case is When the main body is attached to the mounting plate, the upper support hook is inserted into a hook insertion part into which the upper support hook is hooked, When the main body is attached to the mounting plate, the central insertion part into which the hook-shaped part is inserted, It has, The aforementioned central insertion portion is The rear wall portion that forms the rear wall of the main body portion, A plate-shaped central wall portion is provided on the outside of the rear wall portion, spaced apart from the aforementioned rear wall portion, protruding downward from the upper part of the rear case, and having a hook-shaped lower end. Includes, 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-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 of the central wall portion and the tip of the hook-shaped portion come into contact, restricting upward movement of the main body beyond a set distance. The aforementioned protrusion is A bulge is formed integrally with the base portion, and the cross-section parallel to the plate surface of the base portion is formed in a W shape, with the cross-sectional shape decreasing from the base portion which is the root to the tip portion. It is provided at the tip of the protruding portion and is formed in the shape of a plate, and when the main body portion is attached to the mounting plate, the tip wall portion faces the rear wall portion, It further possesses, The aforementioned hook-shaped portion is, It is provided on the upper part of the tip wall portion and includes an inclined piece at its tip that is inclined with respect to the tip wall portion and extends upward and toward the base material portion, The aforementioned central wall portion is The central wall portion has an inclined wall portion that is formed to protrude toward the rear wall portion as it moves from the upper to the lower part of the central wall portion, The aforementioned inclined wall portion is An inclined surface is formed on the surface facing the aforementioned rear wall, which is upward and facing the aforementioned rear wall. An indoor unit of 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 come into contact, thereby restricting the upward movement of the main body beyond a set distance.

2. The aforementioned tip wall portion and the aforementioned hook-shaped portion are It includes a tightly bent shape portion in which the outer edge is folded back to a short length and the plate surface is in close contact, The aforementioned tightly bent portion is, The indoor unit of the air conditioner according to claim 1, wherein the tip wall portion is formed in a continuous manner from the hook-shaped portion to the tip wall portion.

3. The aforementioned bulge is, The upper edge of the bulging portion is formed, and the upper opening is open upward, A plate-like portion extending from the base material portion toward the tip wall portion, constituting the peak portion of the central W-shape, and having an upper surface portion formed below the upper opening within the bulging portion, Includes, When the main body is attached to the mounting plate, the central wall is positioned above the upper opening. The indoor unit of an air conditioner according to claim 1 or 2, wherein if the upper support hook comes out of the hook insertion portion, the central wall portion is inserted into the interior of the bulging portion through the upper opening and comes into contact with the upper surface portion and catches on the protruding portion.

4. The aforementioned hook insertion portion is In the direction along the plate surface of the base material, and in the left-right direction perpendicular to the vertical direction, the following are provided at both ends of the main body: The aforementioned central insertion portion is The indoor unit of the air conditioner according to claim 3, which is provided in the central part of the main body in the left-right direction.

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