Air conditioning system and method for installing an air conditioning system

Abstract

This prevents workers from connecting power wires to both the internal and external power receiving terminals. [Solution] The air conditioning system includes an indoor unit (30) which includes an internal power receiving terminal (311a1) to which a power supply wire (L4) can be connected and indoor relay terminals (311d, 321d) to which a relay wire (L3) can be connected; an outdoor unit (20) which includes an external power receiving terminal (211a1) to which the power supply wire (L4) can be connected and outdoor relay terminals (211d, 221d) to which the relay wire (L3) can be connected; and a terminal cover (60) which can be attached to the indoor unit (30) and the outdoor unit (20), which, when attached to the indoor unit (30), covers the internal power receiving terminal (311a1) but does not cover the indoor relay terminals (311d, 321d), and when attached to the outdoor unit (20), covers the external power receiving terminal (211a1) but does not cover the outdoor relay terminals (211d, 221d).

Description

Technical Field

[0001] The present disclosure relates to an air conditioner and a method for installing an air conditioner.

Background Art

[0002] Patent Document 1 discloses an air conditioner having an indoor unit and an outdoor unit. The indoor unit includes an internal power receiving terminal to which a power supply wire from a power source can be connected, and an indoor-side relay terminal for electrically connecting to the outdoor unit. The outdoor unit includes an external power receiving terminal to which a power supply wire can be connected, and an indoor-side relay terminal for electrically connecting to the indoor unit. The air conditioner is used in a state where a power supply wire is connected to either one of the internal power receiving terminal of the indoor unit and the external power receiving terminal of the outdoor unit, and no power supply wire is connected to the other terminal. As a result, power from the power source is directly supplied to one of the indoor unit and the indoor unit, and power is supplied to the other device via a relay wire connected between the indoor-side relay terminals.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When an operator performs installation work of an air conditioner, if a power supply wire is accidentally connected to each of the internal power receiving terminal and the external power receiving terminal, both the indoor unit and the indoor unit connected to each other by the relay wire will receive power, and there is a possibility that a problem will occur in the air conditioner.

[0005] An object of the present disclosure is to prevent an operator from connecting power supply wires to both the internal power receiving terminal and the external power receiving terminal.

Means for Solving the Problems

[0006] The first embodiment relates to an air conditioning system. The air conditioning system includes an indoor unit (30) which includes an internal power receiving terminal (311a1) to which a power supply wire (L4) can be connected and indoor relay terminals (311d, 321d) to which a relay wire (L3) can be connected; an outdoor unit (20) which includes an external power receiving terminal (211a1) to which the power supply wire (L4) can be connected and outdoor relay terminals (211d, 221d) to which the relay wire (L3) can be connected; and a terminal cover (60) which can be attached to the indoor unit (30) and the outdoor unit (20), and which, when attached to the indoor unit (30), covers the internal power receiving terminal (311a1) but does not cover the indoor relay terminals (311d, 321d), and when attached to the outdoor unit (20), covers the external power receiving terminal (211a1) but does not cover the outdoor relay terminals (211d, 221d).

[0007] In the first embodiment, it is possible to prevent the worker from connecting the power supply wire (L4) to both the internal power receiving terminal (311a1) and the external power receiving terminal (211a1).

[0008] In the second aspect, the terminal cover (60) is detachable from the indoor unit (30) and the outdoor unit (20) respectively without damage or plastic deformation of the terminal cover (60).

[0009] In the second embodiment, the terminal cover (60) can be reused.

[0010] In a third embodiment, the terminal cover (60) includes an engaging claw (63) that can engage with the indoor unit (30) and the outdoor unit (20), respectively, in the first or second embodiment.

[0011] In the third embodiment, the terminal cover (60) can be attached to the indoor unit (30) and the outdoor unit (20) respectively by the engaging claw (63).

[0012] The fourth aspect is the third aspect, wherein the terminal cover (60) includes an opening (61a) in a position that does not face the internal power receiving terminal (311a1) when mounted on the indoor unit (30) and in a position that does not face the external power receiving terminal (211a1) when mounted on the outdoor unit (20), and the engaging claw (63) is positioned on the edge of the opening (61a).

[0013] In the fourth embodiment, it is possible to prevent the terminal cover (60) from easily coming off the indoor unit (30) or outdoor unit (20) due to the worker's carelessness.

[0014] A fifth embodiment is one of the first to fourth embodiments, wherein the terminal cover (60) can be mounted on a vertical surface included in each of the indoor unit (30) and the outdoor unit (20).

[0015] In the fifth embodiment, the operator can attach and detach the terminal cover (60) from the front of the indoor unit (30) or the outdoor unit (20), making it easy to attach and detach the terminal cover (60).

[0016] The sixth embodiment is one of the first to fifth embodiments, wherein the indoor unit (30) and the outdoor unit (20) have a common structure for attaching and detaching the terminal cover (60).

[0017] In the sixth embodiment, the operator can attach and detach the terminal cover (60) from both the indoor unit (30) and the outdoor unit (20) using the same procedure, making it easy for the operator to attach and detach the terminal cover (60).

[0018] The seventh embodiment is an embodiment of any one of the first to sixth embodiments, wherein the indoor unit (30) includes an indoor power terminal (311a2) that outputs power to the components of the indoor unit (30), the outdoor unit (20) includes an outdoor power terminal (211a2) that outputs power to the components of the outdoor unit (20), and the terminal cover (60) covers the indoor power terminal (311a2) when attached to the indoor unit (30) and covers the outdoor power terminal (211a2) when attached to the outdoor unit (20).

[0019] In the seventh embodiment, when the terminal cover (60) is attached to the indoor unit (30), the terminal cover (60) can protect the indoor power terminal (311a2), and when the terminal cover (60) is attached to the outdoor unit (20), the terminal cover (60) can protect the outdoor power terminal (211a2).

[0020] The eighth aspect is an aspect of any one of the first to seventh aspects, wherein the indoor unit (30) includes an indoor communication terminal (321a1) for communicating with the outdoor unit (20), the outdoor unit (20) includes an outdoor communication terminal (221a1) for communicating with the indoor unit (30), and the terminal cover (60) covers the indoor communication terminal (321a1) when attached to the indoor unit (30) and covers the outdoor communication terminal (221a1) when attached to the outdoor unit (20).

[0021] In the eighth embodiment, when the terminal cover (60) is attached to the indoor unit (30), the indoor communication terminal (321a1) can be protected by the terminal cover (60), and when the terminal cover (60) is attached to the outdoor unit (20), the outdoor communication terminal (221a1) can be protected by the terminal cover (60).

[0022] The ninth embodiment is an embodiment of any one of the first to eighth embodiments, wherein the air treatment device is provided on the terminal cover (60) and includes a display unit (70) that displays information regarding how to use the terminal cover (60), the information regarding how to use includes information indicating that the terminal cover (60) is attached to either the indoor unit (30) or the outdoor unit (20).

[0023] In the ninth aspect, an operator can easily recognize that a terminal cover (60) should be attached to either the indoor unit (30) or the outdoor unit (20).

[0024] The tenth aspect is any one of the first to ninth aspects, in which the terminal cover (60) includes an interference portion that is located in a first region (R1) when the terminal cover (60) is attached to the outdoor unit (20) and is located in a second region (R2) when the terminal cover (60) is attached to the indoor unit (30). The first region (R1) is a region occupied by an end portion (L4a) of the power supply wire (L4) connected to the external power receiving terminal (211a1), and the second region (R2) is a region occupied by an end portion (L4a) of the power supply wire (L4) connected to the internal power receiving terminal (311a1).

[0025] In the tenth aspect, even if an attempt is made to connect the power supply wire (L4) to the internal power receiving terminal (311a1) with the terminal cover (60) attached to the indoor unit (30), the interference portion interferes with the power supply wire (L4), preventing the power supply wire (L4) from being connected to the internal power receiving terminal (311a1). Also, even if an attempt is made to connect the power supply wire (L4) to the external power receiving terminal (211a1) with the terminal cover (60) attached to the outdoor unit (20), the interference portion interferes with the power supply wire (L4), preventing the power supply wire (L4) from being connected to the external power receiving terminal (211a1).

[0026] Aspect 11 is directed to an installation method of an air conditioner, comprising an indoor unit (30) including an internal power receiving terminal (311a1) to which a power supply wire (L4) can be connected and indoor side relay terminals (311d, 321d) to which a relay wire (L3) can be connected, an outdoor unit (20) including an external power receiving terminal (211a1) to which the power supply wire (L4) can be connected and outdoor side relay terminals (211d, 221d) to which the relay wire (L3) can be connected, and a terminal cover (60) that can be attached to the indoor unit (30) and the outdoor unit (20), covers the internal power receiving terminal (311a1) when attached to the indoor unit (30) and does not cover the indoor side relay terminals (311d, 321d), and covers the external power receiving terminal (211a1) when attached to the outdoor unit (20) and does not cover the outdoor side relay terminals (211d, 221d). The installation method of the air conditioner includes a step of installing the indoor unit (30) and the outdoor unit (20) with the terminal cover (60) attached to one of the indoor unit (30) and the outdoor unit (20), and a step of removing the terminal cover (60) from the one device and attaching the terminal cover (60) to the other of the indoor unit (30) and the outdoor unit (20).

Brief Description of the Drawings

[0027] [Figure 1] FIG. 1 is a schematic piping system diagram of a refrigerant circuit of an air conditioner. [Figure 2] FIG. 2 is a perspective view showing the appearance of an indoor unit. [Figure 3] FIG. 3 is a view of the interior of the indoor unit as seen from the front. [Figure 4] FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 3. [Figure 5] FIG. 5 is a block diagram showing the configuration of an air conditioner with the terminal cover attached to the indoor unit. [Figure 6] FIG. 6 is a block diagram showing the configuration of an air conditioner with the terminal cover attached to the outdoor unit. [Figure 7] FIG. 7 is a perspective view of a terminal block. [Figure 8] FIG. 8 is a perspective view of a terminal block. [Figure 9] Figure 9 is a cross-sectional view of the IX-IX line in Figure 7. [Figure 10] Figure 10 is a cross-sectional view of line XX in Figure 7. [Figure 11] Figure 11 is a perspective view of the terminal cover. [Figure 12] Figure 12 is a perspective view showing the terminal cover attached to the terminal block. [Figure 13] Figure 13 is a perspective view of a terminal block with a terminal cover attached. [Figure 14] Figure 14 is a perspective view of a terminal block with a terminal cover attached. [Figure 15] Figure 15 is a cross-sectional view of the line XV-XV in Figure 13. [Figure 16] Figure 16 is a cross-sectional view of the line XV-XV in Figure 13. [Figure 17] Figure 17 is a flowchart showing the procedure for installing an air conditioning system. [Modes for carrying out the invention]

[0028] The embodiments of this disclosure will be described in detail below with reference to the drawings. However, this disclosure is not limited to the embodiments shown below, and various modifications are possible without departing from the technical idea of ​​this disclosure. Since the drawings are for conceptual explanation of this disclosure, dimensions, ratios, or numbers may be exaggerated or simplified as necessary for ease of understanding.

[0029] (1) Overall configuration of the air conditioning system As shown in Figure 1, the air conditioning system (10) has an outdoor unit (20) and an indoor unit (30). The air conditioning system (10) is a separate type in which the outdoor unit (20) and the indoor unit (30) are connected via two connecting pipes (12, 13). This connection constitutes a refrigerant circuit (11). The refrigerant circuit (11) is filled with refrigerant. The refrigerant circuit (11) performs a refrigeration cycle. The air conditioning system (10) air-conditions the indoor space (I), which is the target space. The air conditioning system (10) performs cooling operation and heating operation.

[0030] (2) Outdoor unit The outdoor unit (20) is located outdoors. The outdoor unit (20) has a compressor (21), an outdoor heat exchanger (22), an expansion valve (23), and a four-way switching valve (24) connected to the refrigerant circuit (11). The outdoor unit (20) has an outdoor fan (25) and an outdoor fan motor (25a) that rotates the outdoor fan (25). The outdoor unit (20) constitutes the outdoor unit.

[0031] The compressor (21) compresses the inhaled refrigerant. The compressor (21) discharges the compressed refrigerant. The outdoor heat exchanger (22) exchanges heat between the refrigerant flowing inside it and the outdoor air by the outdoor fan (25). The outdoor fan (25) transports the outdoor air to the outdoor heat exchanger (22). The expansion valve (23) reduces the pressure of the refrigerant. The expansion valve (23) is an electronically controlled expansion valve with an adjustable opening. The four-way directional control valve (24) switches the flow path of the refrigerant circuit (11). The four-way directional control valve (24) switches between a first state, shown by the solid line in Figure 1, and a second state, shown by the dashed line in Figure 1. The four-way directional control valve (24) is in the first state during cooling operation and in the second state during heating operation.

[0032] (3) Indoor Unit The indoor unit (30) will be explained with reference to Figures 2 to 4. In the following explanation, terms related to "up," "down," "front," "back," "right," and "left" will, in principle, refer to the direction of the arrows shown in Figures 2 to 4.

[0033] The indoor unit (30) comprises a casing (31), an indoor heat exchanger (32), a bell mouth (33), an indoor fan (34), a drain pan (50), and a damper (36). The indoor unit (30) is installed on the floor of the indoor space (I) and constitutes a floor-standing indoor unit.

[0034] (3-1) Casing The casing (31) is installed on the floor. The casing (31) is generally formed in the shape of a rectangular box.

[0035] A first outlet (41) and a plurality of suction ports (43) are formed at the front of the casing (31). The suction ports (43) are located above the first outlet (41). The suction ports (43) are composed of a plurality of slits extending in the left-right direction. The plurality of suction ports (43) are arranged in the vertical direction. A second outlet (42) is formed at the top of the casing (31). The second outlet (42) is located above the first outlet (41). The second outlet (42) is an elongated hole extending in the left-right direction.

[0036] The casing (31) has an air passage (P). The air passage (P) is a passage that extends from a plurality of intake ports (43) to the first outlet (41) and the second outlet (42). The air passage (P) includes a lower passage (38) and an upper passage (39). The lower passage (38) is a passage that extends from the downstream side of the indoor fan (34) to the first outlet (41). The lower passage (38) is located at the bottom of the casing (31). The upper passage (39) is a passage that extends from the downstream side of the indoor fan (34) to the second outlet (42). The upper passage (39) is located at the top of the casing (31).

[0037] In this embodiment, the front plate (31a) is configured to be detachably attached to the main body (B) of the casing (31). The main body (B) is the part of the casing (31) excluding the front plate (31a). When the front plate (31a) is removed from the main body (B), a maintenance opening is formed. The front plate (31a) constitutes a lid that opens and closes the opening. When the front plate (31a) is removed from the main body (B), the drain pan (50) is exposed to the outside of the casing (31) through the opening.

[0038] (3-2) Indoor heat exchanger The indoor heat exchanger (32) is positioned in the air passage (P). Specifically, the indoor heat exchanger (32) is positioned behind the front plate (31a). The indoor heat exchanger (32) is a fin-and-tube type air heat exchanger. The shorter side of the indoor heat exchanger (32) corresponds to the front-to-back direction. The direction of the fin arrangement corresponds to the left-to-right direction. The indoor heat exchanger (32) exchanges heat between the refrigerant and the indoor air transported by the indoor fan (34). The indoor heat exchanger (32) functions as both a radiator and an evaporator. As a radiator, the indoor heat exchanger (32) heats the air in the air passage (P). As an evaporator, the indoor heat exchanger (32) cools the air in the air passage (P).

[0039] (3-3) Bellmouth The bell mouth (33) shown in Figure 3 is positioned behind the indoor heat exchanger (32). The bell mouth (33) guides the air that has passed through the indoor heat exchanger (32) to the indoor fan (34).

[0040] (3-4) Indoor fan As shown in Figure 4, the indoor fan (34) is positioned behind the bell mouth (33). The indoor fan (34) is a centrifugal fan, specifically a turbo fan. The indoor fan (34) includes an indoor fan motor (34a), a fan drive shaft (34b) rotated by the indoor fan motor (34a), an impeller (34c) connected to the fan drive shaft (34b), and a cylindrical guide section (35) through which air flows. The fan drive shaft (34b) extends in the front-rear direction. An inlet (35a) for air to flow in is formed at the front end of the guide section (35), and an outlet (35b) for air to flow out is formed on the radially outer side of the guide section (35).

[0041] When the indoor fan (34) is in operation, the air that has passed through the bell mouth (33) flows from the inlet (35a) into the guide section (35). This air is transported by the impeller (34c) and flows radially outward from the outlet (35b) of the guide section (35). The air that flows below the indoor fan (34) passes through the lower flow path (38) and is blown out into the indoor space (I) from the first outlet (41). The air that flows above the indoor fan (34) passes through the upper flow path (39) and is blown out into the indoor space (I) from the second outlet (42).

[0042] (3-5) Drain pan The drain pan (50) is located below the indoor heat exchanger (32). The drain pan (50) is located between the front plate (31a) of the casing (31) and the indoor fan (34). The drain pan (50) collects water (condensation) that has condensed on or around the surface of the indoor heat exchanger (32).

[0043] (3-6) Damper As shown in Figure 4, a damper (36) is provided in the lower flow path (38). The damper (36) is driven by a motor (not shown) to open and close the lower flow path (38). Specifically, the damper (36) moves between an open state, shown by the solid line in Figure 4, and a closed state, shown by the dashed line in Figure 4. When the damper (36) is in the closed state, the lower flow path (38) is blocked, and the flow of air in the lower flow path (38) is prohibited. When the damper (36) is in the open state, the lower flow path (38) is opened, and the flow of air in the lower flow path (38) is permitted.

[0044] (4) Operating The air conditioning system (10) performs both cooling and heating operations.

[0045] (4-1) Cooling operation During cooling operation, the refrigerant circuit (11) performs a refrigeration cycle (cooling cycle) in which the outdoor heat exchanger (22) functions as a heat radiator (more precisely, a condenser) and the indoor heat exchanger (32) functions as an evaporator. In principle, the damper (36) is closed during cooling operation.

[0046] In the indoor unit (30), air from the indoor space (I) flows into the air passage (P) from the intake port (43). This air is cooled by the indoor heat exchanger (32), then flows through the upper passage (39), and is blown out from the second outlet (42) towards the ceiling of the indoor space (I).

[0047] (4-2) Heating operation During heating operation, the refrigerant circuit (11) performs a refrigeration cycle (heating cycle) in which the indoor heat exchanger (32) functions as a radiator (more precisely, a condenser) and the outdoor heat exchanger (22) functions as an evaporator.

[0048] In the indoor unit (30), air from the indoor space (I) flows into the air passage (P) from the intake port (43). This air is heated in the indoor heat exchanger (32) and then divided into an upper passage (39) and a lower passage (38). The air in the upper passage (39) is blown out from the second outlet (42) towards the ceiling of the indoor space (I). The air in the lower passage (38) is blown out from the first outlet (41) towards the floor of the indoor space (I).

[0049] (5) Other components of the outdoor unit As shown in Figure 5, the outdoor unit (20), which is the outdoor unit, comprises an outdoor terminal block (200), a first control board (2a), a first power supply circuit (2b), a first communication circuit (2c), and a first controller (2d). The outdoor terminal block (200) is a device for electrically connecting the power supply (E) and the indoor unit (30) to the outdoor unit (20). The power supply (E) is commercial power. The power supply (E) is also AC power. A power cable (L4) is connected to the power supply (E). The outdoor terminal block (200) can be connected to the power supply (E) via the power cable (L4). The power cable (L4) is a power cable for supplying power from the power supply (E) to the air conditioning unit (10). The outdoor terminal block (200) is connected to the first control board (2a) via a first power supply line (L11) and a first communication line (L12). The first power supply line (L11) is a power cable for supplying power to the outdoor unit (20). The first communication line (L12) is a communication cable for sending control signals between the outdoor unit (20) and the indoor unit (30). The first control board (2a) is equipped with a first power supply circuit (2b), a first communication circuit (2c), and a first controller (2d). The first power supply circuit (2b) is a circuit that generates power to operate the first communication circuit (2c), the first controller (2d), the actuator drive circuit provided in the outdoor unit (20), etc. The first power supply circuit (2b) is connected to the first power supply line (L11) via (P11). The first communication circuit (2c) is a circuit used for communication between the outdoor unit (20) and the indoor unit (30). The first communication circuit (2c) is connected to the first control board (2a) via a pattern (P12) formed on the first control board (2a). The first power supply circuit (2b) and the first communication circuit (2c) are each connected to the first controller (2d) via patterns (P13, P14) formed on the first control board (2a). The first controller (2d) includes a processor such as a CPU and an MPU, and a memory that stores a first program executed by the processor. The first controller (2d) controls the operation of the components of the outdoor unit (20) (such as the outdoor fan motor (25a)) by executing the first program.

[0050] (6) Other components of the indoor unit As shown in Figure 6, the indoor unit (30), which is an indoor unit, comprises an indoor terminal block (300), a second control board (3a), a second power supply circuit (3b), a second communication circuit (3c), and a second controller (3d). The indoor terminal block (300) is a device for electrically connecting the power supply (E) and the indoor unit (30) to the indoor unit (30). The indoor terminal block (300) can be connected to the power supply (E) via a power supply wire (L4). The indoor terminal block (300) is connected to the second control board (3a) via a second power supply line (L21) and a second communication line (L22). The second power supply line (L21) is a power cable for supplying power to the indoor unit (30). The second communication line (L22) is a communication cable for sending control signals between the outdoor unit (20) and the indoor unit (30). The second control board (3a) is equipped with a second power supply circuit (3b), a second communication circuit (3c), and a second controller (3d). The second power supply circuit (3b) is a circuit that generates power to operate the second communication circuit (3c), the second controller (3d), the actuator drive circuit provided in the indoor unit (30), etc. The second power supply circuit (3b) is connected to the second power supply line (L21) via (P21). The second communication circuit (3c) is a circuit used for communication between the outdoor unit (20) and the indoor unit (30). The second communication circuit (3c) is connected to the second control board (3a) via a pattern (P22) formed on the second control board (3a). The second power supply circuit (3b) and the second communication circuit (3c) are each connected to the second controller (3d) via patterns (P23, P24) formed on the second control board (3a). The second controller (3d) includes a processor such as a CPU and an MPU, and memory that stores a second program executed by the processor. The second controller (3d) controls the operation of the components of the indoor unit (30) (such as the indoor fan motor (34a)) by executing the second program.

[0051] The indoor terminal block (300) (indoor unit (30)) is connected to the indoor terminal block (300) (indoor unit (30)) via a relay wire (L3). The relay wire (L3) is a cable for transmitting power and control signals between the indoor terminal block (300) (indoor unit (30)) and the indoor terminal block (300) (indoor unit (30)). The relay wire (L3) includes a first relay wire (L31) and a second relay wire (L32). The first relay wire (L31) is a power cable for transmitting power between the outdoor unit (20) and the indoor unit (30). The second relay wire (L32) is a communication cable for transmitting control signals between the outdoor unit (20) and the indoor unit (30).

[0052] The first controller (2d) controls the operation of the components of the outdoor unit (20) based on control signals sent from the indoor unit (30) (second communication circuit (3c)) via the second communication line (L22), the second relay line (L32), and the first communication line (L12). The second controller (3d) controls the operation of the components of the indoor unit (30) based on control signals sent from the outdoor unit (20) (first communication circuit (2c)) via the first communication line (L12), the second relay line (L32), and the second communication line (L22).

[0053] In this embodiment, two of each of the first power supply line (L11), second power supply line (L21), first relay line (L31), and power supply line (L4) are provided. In addition, one of each of the first communication line (L12), second communication line (L22), and second relay line (L32) is provided.

[0054] (7)Outdoor terminal block As shown in Figures 7 to 10, the outdoor terminal block (200) includes a first connecting member (210), a second connecting member (220), and a first casing (230).

[0055] The first connecting member (210) is a conductive material (for example, a copper material). The first connecting member (210) includes a first part (211a), a second part (211b), a third part (211c), and a first outdoor relay terminal (211d). The first part (211a) is a plate-shaped member having a bent shape. An external power receiving terminal (211a1) is formed at one end of the first part (211a). A power supply wire (L4) can be connected to the external power receiving terminal (211a1). The second part (211b) is a plate-shaped member having a bent shape. An outdoor power supply terminal (211a2) is formed at one end of the second part (211b). A first power supply wire (L11) is connected to the outdoor power supply terminal (211a2). The outdoor power terminal (211a2) outputs power to the components of the room unit (20). The outdoor power terminal (211a2) may be formed at one end of the first part (211a), and the external power receiving terminal (211a1) may be formed at one end of the second part (211b). The third part (211c) is a plate-shaped member positioned between the other end of the first part (211a) and the other end of the second part (211b). The first part (211a), the second part (211b), and the third part (211c) are an integrated member. The first outdoor relay terminal (211d) is an elastically deformable leaf spring-shaped member. The first outdoor relay terminal (211d) is positioned between the other end of the first part (211a) and the other end of the second part (211b). The first relay wire (L31) is connected to the first outdoor relay terminal (211d). The first outdoor relay terminal (211d) elastically deforms so as to press the first relay wire (L31) against the first part (211a) (the dashed line in Figure 9 shows the first outdoor relay terminal (211d)). The first part (211a), where the external power receiving terminal (211a1) is formed, and the second part (211b), where the outdoor power supply terminal (211a2) is formed, are connected via the third part (211c), and furthermore, the first outdoor relay terminal (211d) comes into contact with the second part (211b). As a result, the first outdoor relay terminal (211d), the external power receiving terminal (211a1), and the outdoor power supply terminal (211a2) are electrically connected to each other.

[0056] In this embodiment, by providing two first connecting members (210), two first outdoor relay terminals (211d), two external power receiving terminals (211a1), and two outdoor power supply terminals (211a2) are provided.

[0057] The second connecting member (220) is a conductive member (for example, a copper member). The second connecting member (220) includes a fourth portion (221a), a fifth portion (221b), a sixth portion (221c), and a second outdoor relay terminal (221d). The fourth portion (221a) is a plate-shaped member having a bent shape. An outdoor communication terminal (221a1) is formed at one end of the fourth portion (221a). A first communication line (L12) is connected to the outdoor communication terminal (221a1). The fifth portion (221b) is a plate-shaped member. The sixth portion (221c) is a plate-shaped member positioned between the other end portion (221a2) of the fourth portion (221a) and the fifth portion (221b). The second outdoor relay terminal (221d) is an elastically deformable leaf spring-shaped member. The second outdoor relay terminal (221d) is positioned between the other end portion (221a2) of the fourth portion (221a) and the fifth portion (221b). The second relay wire (L32) is connected to the second outdoor relay terminal (221d). The second outdoor relay terminal (221d) elastically deforms so as to press the second relay wire (L32) against the other end portion (221a2) of the fourth portion (221a) (the dashed line in Figure 10 indicates the second outdoor relay terminal (221d)). The fourth portion (221a), where the outdoor communication terminal (221a1) is formed, and the fifth portion (221b) are connected via the sixth portion (221c), and the second outdoor relay terminal (221d) is in contact with the fifth portion (221b). This electrically connects the second outdoor relay terminal (221d) and the outdoor communication terminal (221a1) to each other.

[0058] In this embodiment, by providing one second connecting member (220), one second outdoor relay terminal (221d) and one outdoor communication terminal (221a1) are provided.

[0059] The first casing (230) is formed of an insulating material such as resin. The first casing (230) includes a first surface (23a) to a sixth surface (23f), a first insertion hole (231), a second insertion hole (232), a first opening (233), a second opening (234), a first fastening hole (235), a second fastening hole (236), and a first engaging portion (237).

[0060] The first surface (23a) covers the interior of the first casing (230) from one side (X1) in the first direction (X). The second surface (23b) covers the interior of the first casing (230) from the other side (X2) in the first direction (X). The third surface (23c) covers the interior of the first casing (230) from one side (Y1) in the second direction (Y). The fourth surface (23d) covers the interior of the first casing (230) from the other side (Y2) in the second direction (Y). The fifth surface (23e) covers the interior of the first casing (230) from one side (Z1) in the third direction (Z). The sixth surface (23f) covers the interior of the first casing (230) from the other side (Z2) in the third direction (Z). The first direction (X), the second direction (Y), and the third direction (Z) are perpendicular to each other.

[0061] Inside the first casing (230), a first connecting member (210) and a second connecting member (220) are arranged. The first outdoor relay terminal (211d) of the first connecting member (210) and the second outdoor relay terminal (221d) of the second connecting member (220) face one side (Z1) of the third direction (Z), and the first connecting member (210) has an external power receiving terminal (211a1) and an outdoor power supply terminal (211a2), and the second connecting member (220) has an outdoor communication terminal (221a1) that also faces one side (Z1) of the third direction (Z). The first connecting member (210) and the second connecting member (220) are aligned along the first direction (X).

[0062] A first insertion hole (231) and a second insertion hole (232) are formed on the fifth surface (23e). The first insertion hole (231) faces the first outdoor relay terminal (211d) of the first connecting member (210). By inserting the first relay wire (L31) into the first insertion hole (231), the first relay wire (L31) is connected to the first outdoor relay terminal (211d). The second insertion hole (232) faces the second outdoor relay terminal (221d) of the second connecting member (220). By inserting the second relay wire (L32) into the second insertion hole (232), the second relay wire (L32) is connected to the second outdoor relay terminal (221d).

[0063] A first opening (233) and a second opening (234) are formed on the sixth surface (23f). The external power receiving terminal (211a1) and the outdoor power supply terminal (211a2) of the first connecting member (210) protrude from the first opening (233). The external power receiving terminal (211a1) and the outdoor power supply terminal (211a2) are aligned along the second direction (Y). The external power receiving terminal (211a1) is located on one side (Y1) of the second direction (Y) relative to the outdoor power supply terminal (211a2). The first outdoor relay terminal (211d) is located on one side (Z1) of the third direction (Z) relative to the external power receiving terminal (211a1) and the outdoor power supply terminal (211a2). The outdoor communication terminal (221a1) of the second connecting member (220) protrudes from the second opening (234). The outdoor communication terminal (221a1) is aligned with the external power receiving terminal (211a1) and the outdoor power supply terminal (211a2) along the first direction (X). The outdoor communication terminal (221a1) is located on one side (X1) of the first direction (X) with respect to the external power receiving terminal (211a1) and the outdoor power supply terminal (211a2).

[0064] A first fastening hole (235) is formed on the third surface (23c). By inserting a screw-like fastening member (235a) through the first fastening hole (235) and the first connecting member (210) and tightening the fastening member (235a), the first connecting member (210) is fixed to the first casing (230).

[0065] Second fastening holes (236) are formed in the third surface (23c) and the sixth surface (23f). The second fastening holes (236) are formed to penetrate the third surface (23c) and the fourth surface (23d) along the second direction (Y). The second fastening holes (236) are holes into which a fastening member (236a) for fastening the outdoor terminal block (200) to the wall member (27) is inserted. The wall member (27) is a plate-shaped member arranged inside the outdoor unit (20), and is, for example, a partition wall for separating the installation space of the first control board (2a), power supply, etc. inside the outdoor unit (20).

[0066] In the first casing (230), a first fitting portion (238) is formed extending from the third surface (23c) to the sixth surface (23f). The first fitting portion (238) is a member that can be fitted with a terminal cover (60), which will be described later. The first fitting portion (238) is a wall-like member that rises from the third surface (23c) and the sixth surface (23f). The first fitting portion (238) has a shape that demarcates the area where the first opening (233) is located and the area where the first fastening hole (235) is located. A first engaging portion (237) is provided on the side of the first fitting portion (238). The first engaging portion (237) is a member for fixing the terminal cover (60), which will be described later, to the first casing (230). The first engaging portion (237) is located between the external power receiving terminal (211a1) and the outdoor power terminal (211a2) and the outdoor communication terminal (221a1). The first engaging portion (237) is a rod-shaped member that is mounted on the side wall (238a) of the first fitting portion (238) and extends from the side wall (238a) along the first direction (X).

[0067] (8) Indoor terminal block As shown in Figures 7 to 10, the indoor terminal block (300) has the same shape as the outdoor terminal block (200). The indoor terminal block (300) includes a third connecting member (310) corresponding to the first connecting member (210), a fourth connecting member (320) corresponding to the second connecting member (220), and a second casing (330) corresponding to the first casing (230). The third connecting member (310) includes an internal power receiving terminal (311a1) to which a power supply wire (L4) can be connected, an indoor power terminal (311a2) to which a second power supply wire (L21) is connected, an indoor communication terminal (321a1) to which a second communication wire (L22) is connected, a first indoor relay terminal (311d) to which a first relay wire (L31) is connected, and a second indoor relay terminal (321d) to which a second relay wire (L32) is connected. The first indoor relay terminal (311d), the internal power receiving terminal (311a1), and the indoor power terminal (311a2) are electrically connected to each other. The indoor power terminal (311a2) outputs power to the components of the indoor unit (30). The second indoor relay terminal (321d) and the outdoor communication terminal (221a1) are electrically connected to each other. The second casing (330) includes a third insertion hole (331) and a fourth insertion hole (432). By inserting the first relay wire (L31) into the third insertion hole (331), the first relay wire (L31) is connected to the first indoor relay terminal (311d). By inserting the second relay wire (L32) into the fourth insertion hole (432), the second relay wire (L32) is connected to the second indoor relay terminal (321d). The second casing (330) includes a third opening (333) from which an internal power receiving terminal (311a1) and an indoor power terminal (311a2) protrude, and a fourth opening (334) from which an outdoor communication terminal (221a1) protrudes. The second casing (330) includes a third fastening hole (335) for fixing the third connecting member (310) to the second casing (330), and a fourth fastening hole (336) for fastening the indoor terminal block (300) to the wall member (37). The wall member (37) is a plate-shaped member arranged inside the indoor unit (30), and is, for example, a partition wall for separating the installation space of the second control board (3a), power supply, etc. inside the indoor unit (30).The second casing (330) includes a second fitting portion (338) into which a terminal cover (60), described later, can be fitted, and a second engaging portion (337) for fixing the terminal cover (60) to the first casing (230).

[0068] (9) Terminal cover As shown in Figures 5, 6, and 11, the air conditioning unit (10) is equipped with a terminal cover (60). The terminal cover (60) is made of an insulating material such as resin. The terminal cover (60) can be attached to both the outdoor terminal block (200) and the indoor terminal block (300). In this embodiment, the air conditioning unit (10) is equipped with one terminal cover (60). As a result, in this embodiment, when the terminal cover (60) is attached to one of the outdoor terminal block (200) (outdoor unit (20)) and the indoor terminal block (300) (indoor unit (30)), the other terminal cover (60) is not attached.

[0069] In this embodiment, with the terminal cover (60) attached to the outdoor terminal block (200) (outdoor unit (20)) and the indoor terminal block (300) (indoor unit (30)), it is possible to connect power supply wires (L4) to each of the outdoor power receiving terminals (211a1) and the indoor power receiving terminals (311a1). In addition, in this embodiment, with the terminal cover (60) attached to the indoor terminal block (300) (indoor unit (30)) and the outdoor terminal block (200) (outdoor unit (20)), it is possible to connect power supply wires (L4) to each of the outdoor power receiving terminals (211a1) and the indoor power receiving terminals (311a1).

[0070] As shown in Figures 11 and 12, the terminal cover (60) includes a top portion (61), a side wall portion (62), and an engaging claw (63).

[0071] The ceiling portion (61) is formed in a plate shape. The ceiling portion (61) includes an opening (61a) that penetrates the ceiling portion (61). The opening (61a) is positioned at a predetermined location on the ceiling portion (61). The predetermined location is such that when the terminal cover (60) is attached to the outdoor terminal block (200), it does not face the external power receiving terminal (211a1), and when the terminal cover (60) is attached to the indoor terminal block (300), it does not face the internal power receiving terminal (311a1). The outdoor unit (20) includes a first engaging portion (237) that can engage with an engaging claw (63), and when the terminal cover (60) is attached to the outdoor terminal block (200) (outdoor unit (20)), the opening (61a) faces the first engaging portion (237). The indoor unit (30) includes a second engaging portion (337) that can engage with the engaging claw (63), and the opening (61a) faces the second engaging portion (337) when the terminal cover (60) is attached to the indoor terminal block (300) (indoor unit (30)). The side wall portion (62) is erected from the edge of the ceiling portion (61) and has a shape that can be fitted onto the fitting portions (238, 338). The engaging claw (63) is formed in the terminal cover (60) (ceiling portion (61)) at the edge of the opening (61a).

[0072] The engaging claw (63) is elastically deformable. It can engage with each of the indoor terminal block (300) (indoor unit (30)) and the indoor terminal block (300) (indoor unit (30)). Specifically, the engaging claw (63) can engage with each of the first engaging portion (237) and the second engaging portion (337). The engaging claw (63) is provided on the back surface (61b) of the terminal cover (60). The back surface (61b) of the terminal cover (60) is the surface of the terminal cover (60) that faces the object to be attached (outdoor terminal block (200) or indoor terminal block (300)) when the terminal cover (60) is attached to the object to be attached. The engaging claw (63) protrudes from the edge of the opening (61a) to the back side (back surface (61b) side) of the opening (61a). A hook portion (63b) having a bulging shape is formed at the tip of the engaging claw (63). The hook portion (63b) includes an inclined surface (63a) whose inclination angle θ with respect to the direction perpendicular to the mounting direction (G1) of the terminal cover (60) is acute (see Figure 15). In this embodiment, the mounting direction (G1) of the terminal cover (60) is the other direction side (Y2) of the second direction (Y).

[0073] (10) Procedure for attaching and detaching the terminal cover As shown in Figure 12, the terminal cover (60) is attached to the outdoor terminal block (200) by being pushed toward the outdoor terminal block (200) from one side (Y1) of the second direction (Y). When the terminal cover (60) is pushed toward the outdoor terminal block (200), the engaging claw (63) comes into contact with the first engaging portion (237) of the outdoor terminal block (200) and undergoes elastic deformation, causing the inclined surface (63a) of the engaging claw (63) to come into contact with the first engaging portion (237) (see arrow G1 in Figure 15). When the terminal cover (60) is pushed toward the outdoor terminal block (200) further, the first engaging portion (237) slides along the inclined surface (63a). Then, as the first engaging portion (237) passes over the inclined surface (63a), the engaging claw (63) elastically deforms so that the hook portion (63b) catches on the first engaging portion (237) (see arrow G2 in Figure 15). As a result, the terminal cover (60) is fixed to the outdoor terminal block (200) and the terminal cover (60) is attached to the outdoor unit (20).

[0074] As shown in Figure 16, when removing the terminal cover (60) from the outdoor terminal block (200) (outdoor unit (20)), a rod-shaped member (H), such as a screwdriver, is inserted through the opening (61a) and pressed against the engaging claw (63), thereby pressing the engaging claw (63) in a direction away from the first engaging portion (237) by the rod-shaped member (H). As a result, the engaging claw (63) elastically deforms in a direction away from the first engaging portion (237), causing the hook portion (63b) of the engaging claw (63) to disengage from the first engaging portion (237) (see arrow G3 in Figure 16). According to this, the inclined surface (63a) of the engaging claw (63) comes into contact with the first engaging portion (237), and the first engaging portion (237) slides along the inclined surface (63a), causing the terminal cover (60) to move to one side (Y1) of the second direction (Y) (see arrow G4 in Figure 16). As a result, it detaches from the outdoor terminal block (200).

[0075] As described above, when attaching the terminal cover (60) to the outdoor terminal block (200), it is sufficient to simply press the terminal cover (60) against the outdoor terminal block (200), eliminating the need for a tool such as the rod-shaped member (H). This allows the terminal cover (60) to be easily attached to the outdoor terminal block (200). In contrast, when removing the terminal cover (60) from the outdoor terminal block (200), a tool such as the rod-shaped member (H) is required, thus preventing the terminal cover (60) from accidentally detaching from the outdoor terminal block (200). Furthermore, the terminal cover (60) is attached to the outdoor terminal block (200) by the engaging claws (63), and the engaging claws (63) are located within the opening (61a). Thus, the engaging claws (63) are located within the opening (61a). As a result, when elastically deforming the engaging claw (63) to remove the terminal cover (60) from the outdoor terminal block (200), the engaging claw (63) cannot be accessed unless a tool that can be inserted into the opening (61a), such as a rod-shaped member (H), is used (see Figure 16). This prevents the terminal cover (60) from being unintentionally detached from the outdoor terminal block (200).

[0076] Since the terminal cover (60) is attached to and detached from the indoor terminal block (300) using the same procedure as the outdoor terminal block (200), the explanation of the procedure for attaching and detaching the terminal cover (60) to the indoor terminal block (300) will be omitted.

[0077] (11) Flow of electricity As shown in Figure 5, when the power supply wire (L4) is connected to the outdoor terminal block (200), power from the power supply (E) is supplied to the outdoor terminal block (200) via the power supply wire (L4). A portion of the power supplied to the outdoor terminal block (200) is supplied to the outdoor unit (20) (first control board (2a)) via the first power supply wire (L11). Another portion of the power supplied to the outdoor terminal block (200) is supplied to the indoor unit (30) (second control board (3a)) via the first relay wire (L31), the indoor terminal block (300), and the second power supply wire (L21).

[0078] As shown in Figure 6, when the power supply wire (L4) is connected to the indoor terminal block (300), power from the power supply (E) is supplied to the indoor terminal block (300) via the power supply wire (L4). A portion of the power supplied to the indoor terminal block (300) is supplied to the indoor unit (30) (second control board (3a)) via the second power supply wire (L21). The remaining portion of the power supplied to the indoor terminal block (300) is supplied to the outdoor unit (20) (first control board (2a)) via the first relay wire (L31), the outdoor terminal block (200), and the first power supply wire (L11).

[0079] (12) Effects As described above, when the terminal cover (60) is attached to the indoor terminal block (300) (indoor unit (30)), it covers the internal power receiving terminal (311a1) but does not cover the indoor relay terminals (311d, 321d). In this embodiment, when the terminal cover (60) is attached to the indoor terminal block (300) (indoor unit (30)), it covers the internal power receiving terminal (311a1) from one side (Y1) of the second direction (Y). When the terminal cover (60) is attached to the outdoor terminal block (200) (outdoor unit (20)), it covers the external power receiving terminal (211a1) but does not cover the outdoor relay terminals (211d, 221d). In this embodiment, when the terminal cover (60) is attached to the outdoor terminal block (200) (outdoor unit (20)), it covers the external power receiving terminal (211a1) from one side (Y1) of the second direction (Y). This allows the operator to recognize which of the internal power receiving terminals (311a1) or external power receiving terminals (211a1) the power supply wire (L4) has been connected to based on the presence or absence of the terminal cover (60), thereby preventing the power supply wire (L4) from being connected to both the internal power receiving terminals (311a1) and the external power receiving terminals (211a1).

[0080] Furthermore, when connecting the power cable (L4) to the internal power receiving terminal (311a1), the worker can attach the terminal cover (60) to the outdoor unit (20), and when connecting the power cable (L4) to the external power receiving terminal (211a1), the worker can attach the terminal cover (60) to the indoor unit (30). Therefore, even if the indoor unit (30) and outdoor unit (20) are moved after installation and installed in another location, the indoor unit (30) and outdoor unit (20) can be relocated with the terminal cover (60) attached to either the indoor unit (30) or the outdoor unit (20). As a result, the terminal cover (60) can be reused when the indoor unit (30) and outdoor unit (20) are moved and installed in another location.

[0081] Furthermore, when the terminal cover (60) is attached to the indoor terminal block (300) (indoor unit (30)), it covers the indoor power terminal (311a2) (with the second power supply line (L21) connected to the indoor power terminal (311a2). When the terminal cover (60) is attached to the outdoor terminal block (200) (outdoor unit (20)), it covers the outdoor power terminal (211a2) (with the first power supply line (L11) connected to the outdoor power terminal (211a2). In this embodiment, since the internal power receiving terminal (311a1) and the indoor power supply terminal (311a2) are aligned along the second direction (Y), when the terminal cover (60) is attached to the indoor terminal block (300) (indoor unit (30)), it covers the internal power receiving terminal (311a1) and the indoor power supply terminal (311a2) from one side (Y1) of the second direction (Y). Also in this embodiment, since the external power receiving terminal (211a1) and the outdoor power supply terminal (211a2) are aligned along the second direction (Y), when the terminal cover (60) is attached to the outdoor terminal block (200) (outdoor unit (20)), it covers the internal power receiving terminal (311a1) and the indoor power supply terminal (311a2) from one side (Y1) of the second direction (Y). As a result, when the terminal cover (60) is attached to the indoor unit (30), the indoor power terminal (311a2) can be protected by the terminal cover (60), and when the terminal cover (60) is attached to the outdoor unit (20), the outdoor power terminal (211a2) can be protected by the terminal cover (60).

[0082] Furthermore, by attaching the terminal cover (60) to the indoor unit (30) or outdoor unit (20) and covering the fastening member (335a) or fastening member (235a) with the terminal cover (60), the risk of workers coming into contact with the energized fastening member (335a) or fastening member (235a) can be reduced.

[0083] Furthermore, the terminal cover (60) can be attached to and detached from the indoor terminal block (300) (indoor unit (30)) and the outdoor terminal block (200) (outdoor unit (20)) by elastic deformation without the terminal cover (60) breaking or undergoing plastic deformation. In this embodiment, the terminal cover (60) can be attached to and detached from the indoor terminal block (300) and the outdoor terminal block (300) by the elastic deformation of the engaging claws (63) of the terminal cover (60). This allows the terminal cover (60) to be reused when the indoor unit (30) and the outdoor unit (20) are moved after installation and installed in another location.

[0084] (13) Procedure for installing an air conditioning system The procedure for installing the air conditioning unit (10) at the place of use will be described below. In this embodiment, the work of installing the air conditioning unit (10) begins with the terminal cover (60) attached to the indoor terminal block (300) (indoor unit (30)).

[0085] As shown in Figure 17, in step S1, if the power supply wire (L4) is connected to the external power receiving terminal (211a1) (Yes in step S2), the process proceeds to step S3. If the power supply wire (L4) is connected to the internal power receiving terminal (311a1) (No in step S2), the process proceeds to step S4.

[0086] In step S2, the worker installs the outdoor unit (20) and the indoor unit (30).

[0087] In step S3, the worker connects the power supply wire (L4) to the external power receiving terminal (211a1). As a result, the installation of the air conditioning unit (10) is completed.

[0088] In step S4, the worker installs the indoor unit (30).

[0089] In step S5, the worker removes the terminal cover (60) from the indoor terminal block (300) (indoor unit (30)).

[0090] In step S6, the worker connects the power supply wire (L4) to the internal power receiving terminal (311a1).

[0091] In step S7, the worker installs the outdoor unit (20).

[0092] In step S8, the worker attaches the terminal cover (60) to the outdoor terminal block (200) (outdoor unit (20)). As a result, the installation of the air conditioning system (10) is completed.

[0093] Furthermore, the work of installing the air conditioning unit (10) may begin with the terminal cover (60) attached to the outdoor terminal block (200) (outdoor unit (20)). In this configuration, when connecting the power supply wire (L4) to the internal power receiving terminal (311a1), the worker installs the outdoor unit (20) and the indoor unit (30) respectively, and then connects the power supply wire (L4) to the internal power receiving terminal (311a1). Also, in this configuration, when connecting the power supply wire (L4) to the external power receiving terminal (211a1), the worker installs the outdoor unit (20) and the indoor unit (30) respectively, removes the terminal cover (60) from the outdoor terminal block (200) (outdoor unit (20)) and attaches it to the indoor terminal block (300) (indoor unit (30)), and then connects the power supply wire (L4) to the external power receiving terminal (211a1).

[0094] (14) Other embodiments The terminal cover (60) may be mounted on a vertical plane included in each of the outdoor terminal block (200) (outdoor unit (20)) and the indoor terminal block (300) (indoor unit (30)). In other words, when the terminal cover (60) is mounted on each of the outdoor terminal block (200) (outdoor unit (20)) and the indoor terminal block (300) (indoor unit (30)), the mounting direction of the terminal cover (60) (arrow G1 in Figure 15) may be horizontal. In this embodiment, each of the outdoor terminal block (200) and the indoor terminal block (300) is installed such that the opposing surfaces (238b, 338b) (see Figure 12) of the mating portion (238, 338) that face the back surface (61b) of the terminal cover (60) when the terminal cover (60) is mounted are parallel to the vertical direction. In this embodiment, the vertical plane is the opposing surface (238b, 338b) of the fitting portion (238, 338). This allows the worker to attach and detach the terminal cover (60) from the front of the outdoor unit (20) or indoor unit (30), making the attachment and detachment of the terminal cover (60) easier.

[0095] In this embodiment, the outdoor terminal block (200) and the indoor terminal block (300) have the same structure. However, the present invention is not limited thereto. The outdoor terminal block (200) (outdoor unit (20)) and the indoor terminal block (300) (indoor unit (30)) only need to have a common structure for attaching and detaching the terminal cover (60). That is, the outdoor terminal block (200) (outdoor unit (20)) and the indoor terminal block (300) (indoor unit (30)) only need to have a structure that allows the terminal cover (60) to be attached and detached using the same procedure as shown in Figures 15 and 16 (a structure that allows attachment and detachment using engaging claws (63) and engaging parts (237, 337)).

[0096] Furthermore, the terminal cover (60) may further cover the indoor communication terminal (321a1) when attached to the indoor terminal block (300) (indoor unit (30)), and further cover the outdoor communication terminal (221a1) when attached to the outdoor terminal block (200) (outdoor unit (20)). In this case, for example, by increasing the dimensions of the terminal cover (60) in the first direction (X), when the terminal cover (60) is attached to the indoor terminal block (300) (indoor unit (30)), the terminal cover (60) may cover the internal power receiving terminal (311a1) and the indoor communication terminal (321a1), and when the terminal cover (60) is attached to the outdoor terminal block (200) (outdoor unit (20)), the terminal cover (60) may cover the external power receiving terminal (211a1) and the outdoor communication terminal (221a1). As a result, when the terminal cover (60) is attached to the indoor unit (30), the terminal cover (60) protects the indoor communication terminal (321a1), and when the terminal cover (60) is attached to the outdoor unit (20), the terminal cover (60) protects the outdoor communication terminal (221a1). When the terminal cover (60) is attached to the indoor terminal block (300) (indoor unit (30)), the terminal cover (60) covers the indoor communication terminal (321a1), and the second communication line (L22) is connected to the indoor communication terminal (321a1). Similarly, when the terminal cover (60) is attached to the outdoor terminal block (200) (outdoor unit (20)), the terminal cover (60) covers the outdoor communication terminal (221a1), and the second communication line (L22) is connected to the outdoor communication terminal (221a1).

[0097] The air conditioning unit (10) may be equipped with a display unit (70) that displays information regarding the use of the terminal cover (60). The display unit (70) is, for example, a nameplate. The display unit (70) is provided on the outer surface of the terminal cover (60) (for example, the third surface (23c)). The display unit (70) displays information regarding how to use the terminal cover (60). The information regarding the use of the terminal cover (60) includes information indicating that the terminal cover (60) should be attached to either the indoor terminal block (300) (indoor unit (30)) or the outdoor terminal block (200) (outdoor unit (20)). The information regarding the use of the terminal cover (60) may also include information indicating that the operator should be reminded to attach the terminal cover (60) to either the indoor terminal block (300) (indoor unit (30)) or the outdoor terminal block (200) (outdoor unit (20)). This makes it easy for the worker to recognize that the terminal cover (60) should be attached to either the indoor unit (30) or the outdoor unit (20).

[0098] Furthermore, in this embodiment, an outdoor terminal block (200) is provided with an external power receiving terminal (211a1), an outdoor power supply terminal (211a2), and outdoor relay terminals (211d, 221d). However, the present invention is not limited thereto. The external power receiving terminal (211a1) and the outdoor power supply terminal (211a2), and the outdoor relay terminals (211d, 221d) may be provided on separate terminal blocks and electrically connected to each other by wiring. In this embodiment, an indoor terminal block (300) is provided with an internal power receiving terminal (311a1), an indoor power supply terminal (311a2), and indoor relay terminals (311d, 321d). However, the present invention is not limited thereto. The internal power receiving terminal (311a1) and the indoor power supply terminal (311a2), and the indoor relay terminals (311d, 321d) may be provided on separate terminal blocks and electrically connected to each other by wiring.

[0099] In this embodiment, the air conditioning system (10) is equipped with one terminal cover (60), and the installation work of the outdoor unit (20) and the indoor unit (30) begins with the terminal cover (60) attached to either the outdoor terminal block (200) (outdoor unit (20)) or the indoor terminal block (300) (indoor unit (30)). However, the present invention is not limited to this. The air conditioning system (10) may be equipped with a plurality (two) terminal covers (60). In this case, the terminal cover (60) is attached to each of the outdoor terminal block (200) (outdoor unit (20)) and the indoor terminal block (300) (indoor unit (30)), and the installation work of the outdoor unit (20) and the indoor unit (30) begins from this state. When installing the outdoor unit (20) and the indoor unit (30), the worker removes the terminal cover (60) attached to the unit to which the power supply wire (L4) is connected, connects the power supply wire (L4) to that unit, and installs the units to which the power supply wire (L4) is not connected while keeping the terminal cover (60) attached. Therefore, if the air conditioning system (10) is equipped with multiple terminal covers (60), the system may be configured so that the work of switching the terminal cover (60) between the outdoor unit (20) and the indoor unit (30) is not performed during the installation work of the outdoor unit (20) and the indoor unit (30).

[0100] In this embodiment, in each of the outdoor unit (20) and the indoor unit (30), terminals (211a1, 311a1) and terminals (211a2, 311a2) are arranged along the second direction (Y) (see Figure 14). However, the present invention is not limited thereto. In each of the outdoor unit (20) and the indoor unit (30), terminals (211a1, 311a1) and terminals (211a2, 311a2) may be arranged along the first direction (X). Also, in each of the outdoor unit (20) and the indoor unit (30), terminals (211a1, 311a1), terminals (211a2, 311a2) and communication terminals (221a1, 321a1) may be arranged in a line.

[0101] The terminal cover (60) may include an interference portion. The interference portion is a projection that protrudes from the terminal cover (60). When the terminal cover (60) is attached to the outdoor terminal block (200) (outdoor unit (20)), the terminal cover (60) is located in the first region (R1) (see Figure 14). The first region (R1) is the region occupied by the end (L4a) (see Figure 9) of the power supply wire (L4) connected to the external power receiving terminal (211a1). If the interference portion is located in the first region (R1), even if one attempts to connect the power supply wire (L4) to the external power receiving terminal (211a1), the end (L4a) of the power supply wire (L4) will come into contact with the interference portion, making it impossible to connect the power supply wire (L4) to the external power receiving terminal (211a1). When the terminal cover (60) is attached to the indoor terminal block (300) (indoor unit (30)), the terminal cover (60) is located in the second region (R2) (see Figure 14). The second region (R2) is the area occupied by the end (L4a) (see Figure 9) of the power supply wire (L4) connected to the internal power receiving terminal (311a1). When the interference point is located in the second region (R2), even if an attempt is made to connect the power supply wire (L4) to the internal power receiving terminal (311a1), the end (L4a) of the power supply wire (L4) will come into contact with the interference point, making it impossible to connect the power supply wire (L4) to the internal power receiving terminal (311a1). As a result, it is possible to effectively prevent the worker from connecting the power supply wire (L4) to both the internal power receiving terminal (311a1) and the external power receiving terminal (211a1). The interfering portion has a shape in which a projection (64) (see Figure 11) provided on the terminal cover (60) is further protruding. The end (L4a) of the power supply wire (L4) may be a connector, faston terminal, etc., provided on the power supply wire (L4) for connection to the external power receiving terminal (211a1) and the internal power receiving terminal (311a1).

[0102] The air conditioning system (10) of this embodiment has an indoor unit (30) consisting of a floor-standing indoor unit. However, the present invention is not limited thereto. The air conditioning system (10) may be a separate type having an indoor unit (30) and an outdoor unit (20), and the indoor unit (30) does not have to be floor-standing. The indoor unit (30) may be, for example, a ceiling-mounted indoor unit, a ceiling cassette type indoor unit, or a wall-mounted indoor unit.

[0103] The air conditioning system (10) does not have to be a paired system having one indoor unit (30) and one outdoor unit (20), but may be an indoor multi-system having multiple indoor units (30) or an outdoor multi-system having multiple outdoor units (20).

[0104] The indoor fan (34) does not have to be a turbo fan; it may be a centrifugal fan, a propeller fan, or a cross-flow fan.

[0105] While embodiments and modifications have been described above, it will be understood that a variety of changes in form and details are possible without departing from the spirit and scope of the claims. Furthermore, the embodiments, modifications, and other embodiments described above may be combined or substituted as appropriate, as long as they do not impair the functions covered by this disclosure.

[0106] The designations "1st," "2nd," "3rd," etc., mentioned above are used to distinguish between the terms to which these designations are attached, and do not limit the number or order of those terms. [Industrial applicability]

[0107] As described above, this disclosure is useful for air conditioning systems and methods for installing air conditioning systems. [Explanation of symbols]

[0108] 10. Air conditioning system 20 Outdoor unit (outdoor unit) 30 Indoor Units (Indoor Units) 60 Terminal Cover 61a aperture 63 Engaging claws 70 Display section 211d Outdoor relay terminal 221d Outdoor relay terminal 211a1 External power receiving terminal 211a2 Outdoor power terminal 221a1 Outdoor communication terminal 311d Indoor relay terminal 321d Indoor relay terminal 311a1 Internal power receiving terminal 311a2 Indoor power terminal 321a1 Indoor communication terminal L3 relay cable L4 power wire R1 1st area R2 2nd area

Claims

1. An indoor unit (30) including an internal power receiving terminal (311a1) to which a power supply wire (L4) can be connected, and indoor relay terminals (311d, 321d) to which a relay wire (L3) can be connected, An outdoor unit (20) including an external power receiving terminal (211a1) to which the power supply wire (L4) can be connected, and an outdoor relay terminal (211d, 221d) to which the relay wire (L3) can be connected, A terminal cover (60) that can be attached to the indoor unit (30) and the outdoor unit (20), which, when attached to the indoor unit (30), covers the internal power receiving terminal (311a1) but does not cover the indoor side relay terminals (311d, 321d), and when attached to the outdoor unit (20), covers the external power receiving terminal (211a1) but does not cover the outdoor side relay terminals (211d, 221d), and An air conditioning system equipped with the following features.

2. The air conditioning device according to claim 1, wherein the terminal cover (60) can be attached to and detached from the indoor unit (30) and the outdoor unit (20) without damage or plastic deformation of the terminal cover (60).

3. The air conditioning device according to claim 2, wherein the terminal cover (60) includes an engaging claw (63) that can engage with the indoor unit (30) and the outdoor unit (20), respectively.

4. The air conditioning device according to claim 3, wherein the terminal cover (60) includes an opening (61a) in a position that does not face the internal power receiving terminal (311a1) when attached to the indoor unit (30), and in a position that does not face the external power receiving terminal (211a1) when attached to the outdoor unit (20), and the engaging claw (63) is positioned on the edge of the opening (61a).

5. The air conditioning device according to claim 4, wherein the terminal cover (60) can be attached to a vertical surface included in each of the indoor unit (30) and the outdoor unit (20).

6. The air conditioning device according to claim 2, wherein the indoor unit (30) and the outdoor unit (20) have a common structure for attaching and detaching the terminal cover (60).

7. The indoor unit (30) includes an indoor power terminal (311a2) that outputs power to the components of the indoor unit (30), The outdoor unit (20) includes an outdoor power terminal (211a2) that outputs power to the components of the outdoor unit (20), The air conditioning device according to claim 1, wherein the terminal cover (60) covers the indoor power terminal (311a2) when attached to the indoor unit (30) and covers the outdoor power terminal (211a2) when attached to the outdoor unit (20).

8. The indoor unit (30) includes an indoor communication terminal (321a1) for communicating with the outdoor unit (20), The outdoor unit (20) includes an outdoor communication terminal (221a1) for communicating with the indoor unit (30), The air conditioning device according to claim 1, wherein the terminal cover (60) covers the indoor communication terminal (321a1) when attached to the indoor unit (30) and covers the outdoor communication terminal (221a1) when attached to the outdoor unit (20).

9. The terminal cover (60) is provided with a display unit (70) that displays information regarding how to use the terminal cover (60), The air conditioning device according to any one of claims 1 to 8, wherein the information relating to the method of use includes information indicating that the terminal cover (60) is attached to either the indoor unit (30) or the outdoor unit (20).

10. The terminal cover (60) includes an interference portion located in a first region (R1) when the terminal cover (60) is attached to the outdoor unit (20), and located in a second region (R2) when the terminal cover (60) is attached to the indoor unit (30). The first region (R1) is the region occupied by the end (L4a) of the power supply wire (L4) connected to the external power receiving terminal (211a1), The air conditioning device according to any one of claims 1 to 8, wherein the second region (R2) is the region occupied by the end (L4a) of the power supply wire (L4) connected to the internal power receiving terminal (311a1).

11. An indoor unit (30) including an internal power receiving terminal (311a1) to which a power supply wire (L4) can be connected, and indoor relay terminals (311d, 321d) to which a relay wire (L3) can be connected, An outdoor unit (20) including an external power receiving terminal (211a1) to which the power supply wire (L4) can be connected, and an outdoor relay terminal (211d, 221d) to which the relay wire (L3) can be connected, A terminal cover (60) that can be attached to the indoor unit (30) and the outdoor unit (20), which, when attached to the indoor unit (30), covers the internal power receiving terminal (311a1) but does not cover the indoor side relay terminals (311d, 321d), and when attached to the outdoor unit (20), covers the external power receiving terminal (211a1) but does not cover the outdoor side relay terminals (211d, 221d), and A method for installing an air conditioning system, comprising: A step of installing the indoor unit (30) and the outdoor unit (20) with the terminal cover (60) attached to one of the indoor unit (30) and the outdoor unit (20), The process involves removing the terminal cover (60) from one of the aforementioned devices and attaching the terminal cover (60) to the other of the indoor unit (30) and the outdoor unit (20). A method for installing an air conditioning system, including the installation of an air conditioning system.

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