Drain drainage inspecting device and drain drainage inspecting method

Abstract

A drain drainage inspecting device according to the present disclosure comprises a battery accommodating unit, a battery connector unit to which a mobile battery can be electrically connected, a voltage converting unit, a pump connector unit to which a drain pump can be electrically connected, a pump drive switch, a switch connector unit to which a float switch can be electrically connected, and a first notifying unit capable of notifying a state of the float switch, wherein, when the drain pump is connected to the pump connector unit and the pump drive switch is in an ON state, an output voltage of at least one battery or an output voltage of the mobile battery is supplied to the drain pump via the voltage converting unit, and when the float switch is connected to the switch connector unit and the float switch adopts an ON state, the output voltage of the least one battery or the output voltage of the mobile battery is supplied to the float switch.

Description

Drainage inspection device and drainage inspection method

[0001] The present disclosure relates to a drain discharge inspection device and a drain discharge inspection method.

[0002] For example, as described in Patent Document 1, a test run system is known for performing a test run of a drain pump when an indoor unit of an air conditioner with a built-in drain pump is installed in a newly constructed building.

[0003] Japanese Patent Application Laid-Open No. 2021-89090

[0004] In the test run system described above, power from a mobile battery is supplied to the drain pump to test run the drain pump. However, if the mobile battery is forgotten, the cable connecting the mobile battery is forgotten, or the mobile battery is out of charge, power cannot be supplied to the drain pump, and the test run of the drain pump cannot be performed.

[0005] In view of the above circumstances, one of the objects of the present disclosure is to provide a drainage inspection device that can improve convenience, and a drainage inspection method using such a drainage inspection device.

[0006] One aspect of the drain discharge inspection device according to the present disclosure is a drain discharge inspection device used for an indoor unit of an air conditioner equipped with a drain pump capable of discharging water from inside a drain pan and a float switch that switches between an ON state and an OFF state depending on the water level in the drain pan, the drain discharge inspection device comprising: a battery housing portion capable of detachably holding at least one battery; a battery connector portion to which a mobile battery can be electrically connected; a voltage conversion portion capable of converting the output voltage of the at least one battery held in the battery housing portion and the output voltage of the mobile battery connected to the battery connector portion into a drive voltage for the drain pump; a pump connector portion to which the drain pump can be electrically connected and which is electrically connected to the voltage conversion portion; and an ON state electrically connecting the voltage conversion portion and the pump connector portion, and The device comprises a pump drive switch that electrically disconnects the voltage conversion unit and the pump connector unit in the FF state, a switch connector unit to which the float switch can be electrically connected and which is electrically connected to the battery storage unit and the battery connector unit, and a first notification unit that can notify the state of the float switch, wherein when the drain pump is connected to the pump connector unit and the pump drive switch is in the ON state, the output voltage of the at least one battery or the output voltage of the mobile battery is supplied to the drain pump via the voltage conversion unit, and when the float switch is connected to the switch connector unit and the float switch is in the ON state, the output voltage of the at least one battery or the output voltage of the mobile battery is supplied to the float switch.

[0007] One aspect of the drain drainage inspection method disclosed herein is a drain drainage inspection method performed on an indoor unit of an air conditioner that is equipped with a drain pump capable of discharging water from inside a drain pan and a float switch that switches between ON and OFF states depending on the water level in the drain pan, and includes connecting the drain pump to the pump connector portion of the above-mentioned drain drainage inspection device and connecting the float switch to the switch connector portion, injecting water into the drain pan until the first alarm unit indicates that the float switch has turned ON, turning the pump drive switch to the ON state after stopping the injection of water into the drain pan, and turning the pump drive switch to the OFF state after at least the first alarm unit indicates that the float switch has turned OFF.

[0008] According to the present disclosure, the convenience of a drain discharge inspection device can be improved.

[0009] FIG. 1 is a diagram schematically showing a state in which a drain drainage inspection device according to an embodiment is connected to an indoor unit of an air conditioner. FIG. 2 is a diagram schematically showing a general configuration of a drain drainage inspection device according to an embodiment and a general configuration of an indoor unit. FIG. 3 is a perspective view showing a part of an indoor unit in which a drain drainage inspection is performed using a drain drainage inspection device according to an embodiment. FIG. 4 is a perspective view showing a drain drainage inspection device according to an embodiment, with the battery cover removed. FIG. 5 is a perspective view showing a drain drainage inspection device according to an embodiment, with the battery cover and multiple batteries removed. FIG. 6 is a diagram showing the circuit configuration of a drain drainage inspection device according to an embodiment. FIG. 7 is a flowchart showing an example of the procedure of a drain drainage inspection method according to an embodiment.

[0010] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. Note that the scope of the present disclosure is not limited to the following embodiments and can be modified as desired within the scope of the technical concept of the present disclosure. In addition, in the following drawings, the scale and number of each structure may differ from the scale and number of the actual structure in order to make each configuration easier to understand.

[0011] FIG. 1 is a diagram schematically illustrating a drain drainage inspection device 100 according to the present embodiment connected to an indoor unit 90a of an air conditioner 90. FIG. 2 is a diagram schematically illustrating the general configuration of the drain drainage inspection device 100 and the general configuration of the indoor unit 90a. FIG. 3 is a perspective view showing a portion of the indoor unit 90a in which a drain drainage inspection is performed using the drain drainage inspection device 100. FIG. 4 is a perspective view showing the drain drainage inspection device 100 according to the present embodiment. FIG. 5 is a perspective view showing the drain drainage inspection device 100 according to the present embodiment, with the battery cover 11a removed. FIG. 6 is a perspective view showing the drain drainage inspection device 100 according to the present embodiment, with the battery cover 11a and multiple batteries 80 removed. FIG. 7 is a diagram illustrating the circuit configuration of the drain drainage inspection device 100 according to the present embodiment.

[0012] 1 and 2, the drain discharge inspection device 100 is an apparatus used for an indoor unit 90a of an air conditioner 90. The drain discharge inspection device 100 is an apparatus for performing a drain discharge inspection on the indoor unit 90a. In this embodiment, the drain discharge inspection includes a test run of a drain pump 95 (described later) and an operation check of a float switch 96 (described later).

[0013] In this embodiment, the indoor unit 90a is a ceiling-mounted indoor unit. As shown in Fig. 2, the indoor unit 90a includes a housing 91, a heat exchanger 92, a blower 93, a drain pan 94, a drain pump 95, a float switch 96, and a control unit 97.

[0014] The housing 91 accommodates a heat exchanger 92, a blower 93, a drain pan 94, a drain pump 95, and a float switch 96. As shown in Fig. 3, an intake port 91a and an outlet port 91b are formed on the vertically lower surface of the housing 91. When the blower 93 is driven, indoor air is drawn into the housing 91 through the intake port 91a. The air drawn into the housing 91 passes through the heat exchanger 92 and is blown out into the room through the outlet port 91b.

[0015] The drain pan 94 is disposed vertically below the heat exchanger 92. As shown in FIG. 2, the drain pan 94 can store water W, such as condensation water, that falls from the heat exchanger 92. The drain pump 95 can discharge the water W from the drain pan 94. The drain pump 95 sends the water W from the drain pan 94 into a drain pipe 98 connected externally to the housing 91 of the indoor unit 90a, thereby discharging the water W from the drain pan 94 to the outside of the indoor unit 90a. As shown in FIG. 3, the drain pipe 98 has a transparent visualization portion 98a made of a transparent material. An operator performing a drainage inspection using the drainage inspection device 100 can view the water W flowing through the drain pipe 98 from outside the drain pipe 98 through the transparent visualization portion 98a. Note that in the following description, an operator performing a drainage inspection using the drainage inspection device 100 may be simply referred to as an "operator."

[0016] As shown in FIG. 1 , a connection cable 95a is connected to the drain pump 95. The connection cable 95a has a cable main body 95b extending from the drain pump 95 and a connector portion 95c provided at the tip of the cable main body 95b. In FIG. 1 , a solid line indicates the drain pump 95 connected to the drain discharge inspection device 100 via the connection cable 95a, and a two-dot chain line indicates the drain pump 95 connected to the control unit 97 via the connection cable 95a. When a drain discharge inspection is not being performed using the drain discharge inspection device 100, the drain pump 95 is connected to a control board 97c of the control unit 97 via the connection cable 95a. In this case, the connector portion 95c of the connection cable 95a is detachably connected to a connector portion 97a provided on the control board 97c.

[0017] As shown in FIG. 2, the float switch 96 has a reed switch portion 96d and a float portion 96e. Although not shown, the reed switch portion 96d has contacts arranged spaced apart inside. The contacts are connected to each other by a magnetic field generated around the reed switch portion 96d. This places the float switch 96 in an ON state. On the other hand, when the magnetic field generated around the reed switch portion 96d disappears, the contacts are separated from each other again. This places the float switch 96 in an OFF state.

[0018] The float portion 96e is located inside the drain pan 94. The float portion 96e is movable in the vertical direction relative to the reed switch portion 96d. When water W is stored inside the drain pan 94, the float portion 96e floats on the water W stored in the drain pan 94. Therefore, as the water level in the drain pan 94 changes vertically, the float portion 96e moves vertically. Although not shown, a magnet is attached to the float portion 96e.

[0019] As the water level in the drain pan 94 rises, the float portion 96e rises, and when a magnet (not shown) approaches the reed switch portion 96d, the magnetic field of the magnet connects the contacts provided inside the reed switch portion 96d to each other, turning the float switch 96 ON. On the other hand, as the water level in the drain pan 94 falls, the float portion 96e descends, and when the magnet (not shown) moves away from the reed switch portion 96d, the contacts provided inside the reed switch portion 96d move away from each other, turning the float switch 96 OFF. As described above, the float switch 96 switches between ON and OFF states depending on the water level in the drain pan 94.

[0020] As shown in FIG. 1 , a connection cable 96a is connected to the float switch 96. The connection cable 96a has a cable main body 96b extending from a reed switch portion 96d and a connector portion 96c provided at the tip of the cable main body 96b. In FIG. 1 , a solid line indicates the state in which the float switch 96 is connected to the drain discharge inspection device 100 via the connection cable 96a, and a two-dot chain line indicates the state in which the float switch 96 is connected to the control unit 97 via the connection cable 96a. When a drain discharge inspection is not being performed using the drain discharge inspection device 100, the float switch 96 is connected to a control board 97c of the control unit 97 via the connection cable 96a. In this case, the connector portion 96c of the connection cable 96a is detachably connected to a connector portion 97b provided on the control board 97c.

[0021] The drain pump 95 is constantly driven when the indoor unit 90a is in an operating state in which condensation water forms on the surface of the heat exchanger 92. Operating states in which condensation water forms on the surface of the heat exchanger 92 include, for example, a state in which the indoor unit 90a is in cooling operation and a state in which the indoor unit 90a is in dry operation. On the other hand, when the indoor unit 90a is in an operating state other than a state in which condensation water forms on the surface of the heat exchanger 92, the drain pump 95 is driven according to the state of the float switch 96. Operating states other than a state in which condensation water forms on the surface of the heat exchanger 92 include, for example, a state in which the indoor unit 90a is in heating operation and a state in which the indoor unit 90a is stopped.

[0022] When the drain pump 95 is driven in response to the state of the float switch 96, with the float switch 96 electrically connected to the control board 97c, if the water level in the drain pan 94 exceeds a threshold value and the float switch 96 is turned ON, the control board 97c drives the drain pump 95 to discharge the water W in the drain pan 94. When the water W in the drain pan 94 is discharged and the water level in the drain pan 94 falls below a certain height, the float switch 96 turns OFF. When the float switch 96 turns OFF, the control board 97c stops the drain pump 95 and stops the discharge of the water W in the drain pan 94. Normally, when the float switch 96 is turned ON, the drain pump 95 is driven and the water level in the drain pan 94 drops, so the float switch 96 switches to the OFF state within a certain period of time. However, if the rate at which water W accumulates in the drain pan 94 exceeds the amount of water discharged by the drain pump 95, or if the drain pump 95 is broken, the water level in the drain pan 94 may not drop even after a certain amount of time has passed, and the float switch 96 may not turn off. In this case, the control board 97c determines that the water level in the drain pan 94 is abnormal and abnormally shuts down the air conditioner 90. In this way, the float switch 96 is a safety component that abnormally shuts down the air conditioner 90 if the water level in the drain pan 94 becomes abnormally high.

[0023] 4 to 6 , an XYZ coordinate system is shown as a three-dimensional Cartesian coordinate system based on the drain discharge inspection device 100. The direction along the X axis is called the "width direction X," the direction along the Y axis is called the "length direction Y," and the direction along the Z axis is called the "thickness direction Z." The side of the width direction X toward which the X axis arrow points (+X side) is called the "one width direction side," and the side of the width direction X opposite to the side toward which the X axis arrow points (-X side) is called the "other width direction side." The side of the length direction Y toward which the Y axis arrow points (+Y side) is called the "one length direction side," and the side of the length direction Y opposite to the side toward which the Y axis arrow points (-Y side) is called the "other length direction side." The side of the thickness direction Z toward which the Z axis arrow points (+Z side) is called the "one thickness direction side," and the side of the thickness direction Z opposite to the side toward which the Z axis arrow points (-Z side) is called the "other thickness direction side."

[0024] The width direction X, the length direction Y, and the thickness direction Z are simply names used to describe the relative positional relationships of the respective parts, and the actual positional relationships may be other than those indicated by these names.

[0025] 4 to 6 , the drain discharge inspection device 100 includes a device main body 10 and a connection wiring section 70 extending from the device main body 10. In this embodiment, the device main body 10 has a generally rectangular parallelepiped shape extending in the length direction Y. When viewed in the thickness direction Z, the device main body 10 has a pair of sides extending in the width direction X and a pair of sides extending in the length direction Y, and has a generally rectangular shape that is long in the length direction Y. The dimension of the device main body 10 in the thickness direction Z is smaller than the dimension of the device main body 10 in the width direction X.

[0026] As shown in FIG. 2, the device main body 10 includes a case 11, a circuit board 20, a battery housing 30, a pump drive switch 40, a first notification unit 51, a second notification unit 52, and a battery connector 60. As shown in FIG. 4, the case 11 is a generally rectangular box extending in the longitudinal direction Y. As shown in FIGS. 5 and 6, a portion of the case 11 located on the other thickness direction side (−Z side) is a removable battery cover 11a. In this embodiment, the battery cover 11a constitutes a portion of the case 11 located on one width direction side (+X side) of the portion located on the other thickness direction side (−Z side).

[0027] In this embodiment, the circuit board 20 is housed inside the case 11. More specifically, the circuit board 20 is housed in a portion of the inside of the case 11 on the other lengthwise side (-Y side) of the other widthwise side (-X side). The plate surface of the circuit board 20 faces the thickness direction Z. The circuit board 20 has a generally rectangular plate shape that is long in the lengthwise direction Y. The circuit board 20 is a printed wiring board.

[0028] In this embodiment, the battery housing section 30 is housed inside the case 11. More specifically, the battery housing section 30 is housed inside the case 11 on one widthwise side (+X side). The battery housing section 30 is a section that can detachably hold at least one battery 80. In this embodiment, the battery housing section 30 can hold multiple batteries 80. More specifically, the battery housing section 30 can hold six batteries 80. In this embodiment, the battery 80 is a cylindrical battery that extends in one direction. The battery 80 is a dry battery. The battery 80 is, for example, an AA dry battery. An example of an AA dry battery is an AA alkaline battery. The battery 80 may also be a rechargeable battery. An example of a rechargeable battery is an AA nickel-metal hydride battery. The battery 80 may also be a battery other than an AA size, such as a D size, a C size, or a AAA size.

[0029] As shown in Figure 6, the battery housing section 30 has multiple holding sections 31. Each of the multiple holding sections 31 can hold one battery 80. Each holding section 31 is elongated in the length direction Y and has a generally rectangular box shape that is open on the other side in the thickness direction (-Z side). In this embodiment, six holding sections 31 are provided.

[0030] The multiple holding sections 31 include first holding sections 31a and second holding sections 31b. In this embodiment, three first holding sections 31a and three second holding sections 31b are provided, lined up in the longitudinal direction Y. The three second holding sections 31b are arranged adjacent to the three first holding sections 31a on the other widthwise side (-X side) of the three first holding sections 31a. The longitudinal direction Y of the batteries 80 held by the first holding sections 31a and the longitudinal direction Y of the batteries 80 held by the second holding sections 31b are opposite to each other. The batteries 80 held by the six holding sections 31 are connected in series. In other words, in this embodiment, the battery housing section 30 can hold multiple cylindrical batteries 80 connected in series.

[0031] The battery housing section 30 is covered from the other side in the thickness direction (-Z side) by a battery cover 11a. By removing the battery cover 11a, the battery housing section 30 can be exposed to the outside of the case 11. This makes it possible to house a battery 80 in the battery housing section 30 and to remove the battery 80 from the battery housing section 30. The battery housing section 30 may be a battery box that is detachable from the case 11.

[0032] The pump drive switch 40 is a switch that can switch between supplying and not supplying power to the drain pump 95. As shown in FIG. 4 , in this embodiment, the pump drive switch 40 has a button portion 41 that is exposed on the outer surface of the case 11. In this embodiment, the button portion 41 is provided on a wall portion that is located on one longitudinal side (+Y side) of the case 11. With the drain pump 95 connected to a pump connector portion 71b (described later), the operator can supply power from the drain discharge inspection device 100 to the drain pump 95 by pressing the button portion 41 to turn the pump drive switch 40 on.

[0033] 7, the pump drive switch 40 has a switch body 42 provided on the circuit board 20. The state of the switch body 42 is changed in response to the operation of the button 41, thereby switching between the supply of power to the drain pump 95 and the non-supply of power. The switch body 42 will be described in detail later.

[0034] The first notification unit 51 is a part that can notify the state of the float switch 96. In this embodiment, the first notification unit 51 is a light-emitting element that emits light when voltage is supplied to the float switch 96 via a switch connector unit 72b (described later). More specifically, the first notification unit 51 is a light-emitting diode (LED). The first notification unit 51 is attached to the circuit board 20.

[0035] As shown in FIG. 4 , the first notification unit 51 is provided at a position opposite in the thickness direction Z to a first window 12a provided in a wall portion on one thickness direction side (+Z side) of the case 11. Light emitted from the first notification unit 51 is emitted to the outside of the case 11 through the first window 12a. This allows a user or the like to confirm from outside the case 11 that the first notification unit 51 has emitted light. In this embodiment, the first notification unit 51 emits light when the float switch 96 is in the ON state and turns off when the float switch 96 is in the OFF state. This allows an operator to confirm the state of the float switch 96 by checking whether or not the first notification unit 51 is emitting light.

[0036] The second notification unit 52 is a part that can notify the state of the drain pump 95. In the present embodiment, the second notification unit 52 is a light-emitting element that emits light when voltage is supplied to the drain pump 95 via a pump connector unit 71b (described later). More specifically, the second notification unit 52 is a light-emitting diode (LED). The second notification unit 52 is attached to the circuit board 20.

[0037] The second notification unit 52 is provided in a position facing in the thickness direction Z a second window 12b provided in a wall portion on one thickness direction side (+Z side) of the case 11. The second notification unit 52 is arranged side by side with the first notification unit 51 in the longitudinal direction Y. The second window 12b is arranged side by side with the first window 12a in the longitudinal direction Y. Light emitted from the second notification unit 52 is emitted to the outside of the case 11 through the second window 12b. This allows an operator to confirm from outside the case 11 that the second notification unit 52 has emitted light. In this embodiment, the second notification unit 52 emits light when the drain pump 95 is operating and turns off when the drain pump 95 is stopped. This allows an operator to check the status of the drain pump 95 by checking whether or not the second notification unit 52 is emitting light.

[0038] The battery connector 60 is a connector to which the mobile battery MB can be electrically connected. As shown in FIGS. 5 and 6 , the battery connector 60 is provided on a wall portion located on the other widthwise side (−X side) of the case 11. The battery connector 60 is exposed to the outside of the case 11. As shown in FIGS. 1 and 2 , the mobile battery MB is connected to the battery connector 60 via a connection cable MBa. The connection cable MBa has a cable main body MBb extending from the mobile battery MB and a connector MBc provided at the tip of the cable main body MBb. The connector MBc is detachably connected to the battery connector 60, thereby electrically connecting the mobile battery MB to the battery connector 60 via the connection cable MBa. The type of mobile battery MB is not particularly limited.

[0039] 4 , the connection wiring part 70 extends from the device main body 10 to one longitudinal side (+Y side). The connection wiring part 70 connects the device main body 10 to the drain pump 95 and the float switch 96. The connection wiring part 70 has a first connection cable 71, a second connection cable 72, and a covering tube 73.

[0040] The first connection cable 71 is a cable for connecting the device main body 10 and the drain pump 95. The first connection cable 71 has a first cable main body 71a extending from the device main body 10 and a pump connector portion 71b provided at the tip of the first cable main body 71a. The pump connector portion 71b is a portion to which the drain pump 95 can be electrically connected. As shown in FIG. 2 , in this embodiment, a connector portion 95c of a connection cable 95a extending from the drain pump 95 is detachably connectable to the pump connector portion 71b. By connecting the connector portion 95c to the pump connector portion 71b, the drain pump 95 is electrically connected to the pump connector portion 71b via the connection cable 95a.

[0041] The second connection cable 72 is a cable for connecting the device main body 10 and the float switch 96. The second connection cable 72 has a second cable main body 72a extending from the device main body 10 and a switch connector portion 72b provided at the tip of the second cable main body 72a. The switch connector portion 72b is a portion to which the float switch 96 can be electrically connected. In this embodiment, a connector portion 96c of a connection cable 96a extending from the float switch 96 is detachably connectable to the switch connector portion 72b. By connecting the connector portion 96c to the switch connector portion 72b, the float switch 96 is electrically connected to the switch connector portion 72b via the connection cable 96a. The switch connector portion 72b is electrically connected to the battery housing portion 30 and the battery connector portion 60.

[0042] As shown in FIG. 4 , the covering tube 73 is a cylindrical tube that covers the first cable main body 71 a of the first connection cable 71 and the second cable main body 72 a of the second connection cable 72 together.

[0043] Next, a more detailed description will be given of the circuit configuration provided on the circuit board 20. As shown in Fig. 7, the circuit board 20 is provided with a voltage conversion unit 21, a detection unit 22, a cutoff unit 23, and a sleep suppression unit 24.

[0044] The voltage conversion unit 21 is a part that can convert the output voltages of the multiple batteries 80 held in the battery storage unit 30 and the output voltage of the mobile battery MB connected to the battery connector unit 60 into a drive voltage for the drain pump 95. In this embodiment, the voltage conversion unit 21 boosts each output voltage input to the voltage conversion unit 21 to the drive voltage for the drain pump 95. The output voltage output from the six batteries 80 connected in series is, for example, 9 V. The output voltage of the mobile battery MB is, for example, 5 V. The drive voltage of the drain pump 95 is, for example, 13 V.

[0045] A pair of input wiring portions 21a, 21b and a pair of output wiring portions 21c, 21d are connected to the voltage conversion portion 21. The pair of input wiring portions 21a, 21b and the pair of output wiring portions 21c, 21d are printed wirings formed on the circuit board 20. The input wiring portion 21a is electrically connected to the wiring portion 60a of the pair of wiring portions 60a, 60b electrically connected to the battery connector portion 60, and the wiring portion 30a of the pair of wiring portions 30a, 30b electrically connected to the battery housing portion 30. The input wiring portion 21b is electrically connected to the wiring portion 60b and the wiring portion 30b. The wiring portions 30a, 30b, 60a, 60b are printed wirings formed on the circuit board 20.

[0046] The input-side wiring portion 21a is electrically connected to the wiring portion 72d, of the pair of wiring portions 72d, 72e electrically connected to the switch connector portion 72b. The input-side wiring portion 21b is electrically connected to the wiring portion 72e. The wiring portions 72d, 72e each include wiring that passes through the second cable main body 72a of the second connection cable 72. A portion of the wiring portion 72d is a printed wiring formed on the circuit board 20. A first notification portion 51 is provided on the portion of the wiring portion 72d that is formed on the circuit board 20. As a result, when a current flows through the wiring portion 72d, the first notification portion 51 emits light.

[0047] The output wiring portion 21c is electrically connected to the wiring portion 71d, which is one of a pair of wiring portions 71d, 71e electrically connected to the pump connector portion 71b. The output wiring portion 21c is electrically connected to the wiring portion 71e. The wiring portions 71d, 71e each include wiring that passes through the first cable main body 71a of the first connection cable 71. A second notification unit 52 that connects the output wiring portion 21c and the output wiring portion 21d is provided between the output wiring portion 21c and the output wiring portion 21d. As a result, a current flows through the output wiring portion 21c and the output wiring portion 21d, causing the second notification unit 52 to emit light.

[0048] The output wiring section 21c is provided with a switch body 42 of the pump drive switch 40. The switch body 42 can switch the output wiring section 21c between a conductive state and a cut-off state depending on the state of the button section 41. When the button section 41 is operated to turn the pump drive switch 40 ON, the switch body 42 puts the output wiring section 21c into a conductive state. On the other hand, when the button section 41 is operated to turn the pump drive switch 40 OFF, the switch body 42 cuts off the output wiring section 21c. When the switch body 42 puts the output wiring section 21c into a conductive state, the voltage conversion section 21 and the pump connector section 71b are electrically connected. When the switch body 42 cuts off the output wiring section 21c, the voltage conversion section 21 and the pump connector section 71b are electrically cut off. In this way, the pump drive switch 40 electrically connects the voltage conversion unit 21 and the pump connector unit 71b when in the ON state, and electrically disconnects the voltage conversion unit 21 and the pump connector unit 71b when in the OFF state.

[0049] The detection unit 22 is provided on the wiring unit 60a connected to the battery connector unit 60. The detection unit 22 is a part that can detect that a mobile battery MB is connected to the battery connector unit 60. The detection unit 22 is configured, for example, with a bipolar transistor. When the mobile battery MB is connected to the battery connector unit 60, a voltage equal to or greater than a threshold is applied between the base and emitter of the detection unit 22, causing the detection unit 22 to turn ON. This causes the detection unit 22 to enter a state in which it has detected that a mobile battery MB is connected to the battery connector unit 60.

[0050] The interrupter 23 is provided on the wiring portion 30a connected to the battery accommodating portion 30. The interrupter 23 is a switching element that can switch the wiring portion 30a between a conductive state and a cut-off state. The interrupter 23 is configured, for example, by a field effect transistor (FET). When the wiring portion 30a is in a conductive state by the interrupter 23, the battery accommodating portion 30 is electrically connected to the voltage conversion portion 21 and the switch connector portion 72b. On the other hand, when the wiring portion 30a is in a cut-off state by the interrupter 23, the battery accommodating portion 30 is electrically cut-off from the voltage conversion portion 21 and the switch connector portion 72b. In this way, the interrupter 23 can cut off the electrical connection between the battery accommodating portion 30 and the voltage conversion portion 21 and the electrical connection between the battery accommodating portion 30 and the switch connector portion 72b by cutting off the wiring portion 30a.

[0051] When the battery accommodating section 30 does not house multiple batteries 80, the cutoff section 23 is in a state in which it cuts off the wiring section 30a. Specifically, when the battery accommodating section 30 does not house multiple batteries 80, no voltage is applied to the gate of the cutoff section 23, which is a field effect transistor, and no current flows between the source and drain of the cutoff section 23. This causes the cutoff section 23 provided on the wiring section 30a to be in a state in which no current flows, and the wiring section 30a is in a cutoff state.

[0052] When multiple batteries 80 are housed in the battery housing 30 and the mobile battery MB is not connected to the battery connector 60, the circuit breaker 23 places the wiring section 30a in a conductive state. Specifically, when multiple batteries 80 are housed in the battery housing 30 and the mobile battery MB is not connected to the battery connector 60, the output voltage of the multiple batteries 80 connected in series is applied to the gate of the circuit breaker 23, which is a field-effect transistor, and conductive state is established between the source and drain of the circuit breaker 23. As a result, the circuit breaker 23 provided in the wiring section 30a is placed in a conductive state, and the wiring section 30a is placed in a conductive state.

[0053] When multiple batteries 80 are housed in the battery accommodating section 30 and a mobile battery MB is connected to the battery connector section 60, the circuit breaker 23 shuts off the wiring section 30a. Specifically, when multiple batteries 80 are housed in the battery accommodating section 30 and a mobile battery MB is connected to the battery connector section 60, the detection section 22 detects that the mobile battery MB is connected to the battery connector section 60, i.e., the detection section 22 is turned on and the circuit switches. This circuit switching prevents the output voltage of the multiple batteries 80 housed in the battery accommodating section 30 from being applied to the gate of the circuit breaker 23. As a result, when the mobile battery MB is connected to the battery connector section 60, the circuit breaker 23 shuts off the wiring section 30a, and the battery accommodating section 30 is electrically disconnected from the voltage conversion section 21 and the switch connector section 72b, even when multiple batteries 80 are housed in the battery accommodating section 30. In this way, when the detection unit 22 detects that the mobile battery MB is connected to the battery connector unit 60, the cutoff unit 23 cuts off the electrical connection between the battery accommodating unit 30 and the voltage conversion unit 21 and the electrical connection between the battery accommodating unit 30 and the switch connector unit 72b. As a result, when multiple batteries 80 are accommodated in the battery accommodating unit 30 and the mobile battery MB is connected to the battery connector unit 60, the cutoff unit 23 functions as a protection circuit that prioritizes power supply from the mobile battery MB.

[0054] The sleep prevention unit 24 is disposed between a pair of wiring units 60a, 60b connected to the battery connector unit 60. The pair of wiring units 60a, 60b are connected to each other by the sleep prevention unit 24. The sleep prevention unit 24 is configured, for example, by a resistive element. When the mobile battery MB is connected to the battery connector unit 60, a circuit including the mobile battery MB and the sleep prevention unit 24 is formed, and current is constantly supplied from the mobile battery MB to the sleep prevention unit 24 regardless of the state of other circuits on the circuit board 20. As a result, a load current is constantly flowing to the mobile battery MB. In this way, the sleep prevention unit 24 is configured to constantly flow a load current to the mobile battery MB when the mobile battery MB is connected to the battery connector unit 60.

[0055] Each of the components of the circuit on the circuit board 20 described above may be configured in any way as long as it has the function of that component. Each component may be realized by hardware including a circuit section, or may be realized by a combination of software and hardware.

[0056] Next, a drain drainage inspection method using the drain drainage inspection device 100 of the present embodiment will be described. FIG. 8 is a flowchart showing an example of the steps of the drain drainage inspection method of the present embodiment. An operator performing the drain drainage inspection method connects a mobile battery MB to the battery connector unit 60 of the drain drainage inspection device 100 (step S1a) or inserts multiple batteries 80 into the battery housing unit 30 of the drain drainage inspection device 100 (step S1b). When the mobile battery MB is connected to the battery connector unit 60, the power of the mobile battery MB is used in the drain drainage inspection, regardless of whether multiple batteries 80 are inserted in the battery housing unit 30. When the mobile battery MB is not connected to the drain drainage inspection device 100 and multiple batteries 80 are inserted in the battery housing unit 30, the power of the multiple batteries 80 is used in the drain drainage inspection.

[0057] The operator may connect the mobile battery MB to the drain discharge inspection device 100 and place multiple batteries 80 in the battery housing 30. Also, if multiple batteries 80 are already placed in the battery housing 30 and the mobile battery MB is not used, the above-described steps S1a and S1b do not need to be performed. In this case, the power of the multiple batteries 80 is used in the drain discharge inspection.

[0058] Next, the worker removes the connector portion 95c of the drain pump 95 and the connector portion 96c of the float switch 96 from the control board 97c of the indoor unit 90a (step S2). The worker connects the removed connector portion 95c of the drain pump 95 and the connector portion 96c of the float switch 96 to the respective connector portions of the drain discharge inspection device 100 (step S3). Specifically, the worker connects the connector portion 95c to the pump connector portion 71b and the connector portion 96c to the switch connector portion 72b. In this way, the drain discharge inspection method in this embodiment includes connecting the drain pump 95 to the pump connector portion 71b of the drain discharge inspection device 100 and connecting the float switch 96 to the switch connector portion 72b.

[0059] Next, the worker begins injecting water W into the drain pan 94 (step S4). For example, as shown in FIG. 3 , the worker uses a water injection pump WP to inject water W into the drain pan 94. In this case, the worker inserts the water injection pipe WPa of the water injection pump WP from the air outlet 91b into the housing 91 of the indoor unit 90a and inserts the tip of the water injection pipe WPa into the drain pan 94. This allows the water W sent by the water injection pump WP to enter the drain pan 94. For example, a pump used to fill a kerosene stove can be used as the water injection pump WP.

[0060] As shown in FIG. 8 , after starting to pour water W into the drain pan 94, the operator checks whether the first notification unit 51, which is a light-emitting element, is lit (step S5). If the first notification unit 51 is not lit (step S5: NO), the operator continues pouring water W into the drain pan 94. On the other hand, if the first notification unit 51 is lit (step S5: YES), the operator stops pouring water W and turns on the pump drive switch 40 of the drain discharge inspection device 100 (step S6). That is, the drain discharge inspection method of this embodiment includes turning on the pump drive switch 40 after stopping pouring water W into the drain pan 94. As described above, the first notification unit 51 emits light when the float switch 96 is turned on. Thus, the drain discharge inspection method of this embodiment includes pouring water W into the drain pan 94 until the first notification unit 51 indicates that the float switch 96 is turned on.

[0061] By confirming that the first notification unit 51 is lit, the operator can confirm that a sufficient amount of water W has been poured into the drain pan 94 to perform a drain discharge inspection, and that the float switch 96 is operating normally. In this embodiment, when the water level in the drain pan 94 reaches or exceeds a threshold value, the float switch 96 is turned on, and voltage is supplied to the float switch 96 via a pair of wiring units 72d, 72e connected to the switch connector unit 72b. In this manner, when the float switch 96 is connected to the switch connector unit 72b and turned on, the output voltage of the battery 80 or the output voltage of the mobile battery MB is supplied to the float switch 96. The output voltage of the battery 80 or the output voltage of the mobile battery MB is supplied to the float switch 96 without passing through the voltage conversion unit 21. When voltage is supplied to the float switch 96 and current flows through the wiring portion 72d, current flows through the first notification portion 51 provided on the wiring portion 72d, and the first notification portion 51 emits light.

[0062] When the pump drive switch 40 is turned ON, the voltage conversion unit 21 and the pump connector unit 71b are electrically connected, and voltage is supplied from the voltage conversion unit 21 to the drain pump 95 via the pump connector unit 71b. The voltage supplied to the drain pump 95 at this time is the output voltage of the battery 80 converted by the voltage conversion unit 21 or the output voltage of the mobile battery MB converted by the voltage conversion unit 21. Thus, in the present embodiment, when the drain pump 95 is connected to the pump connector unit 71b and the pump drive switch 40 is ON, the output voltages of the plurality of batteries 80 or the output voltage of the mobile battery MB are supplied to the drain pump 95 via the voltage conversion unit 21. When a voltage is supplied to the drain pump 95 and a current flows through the output wiring units 21c and 21d, a current flows through the second notification unit 52, and the second notification unit 52 emits light.

[0063] After turning on the pump drive switch 40, the operator confirms that the drain pump 95 is draining the water W from the drain pan 94 (step S7). When voltage is supplied to the drain pump 95 from the drain discharge inspection device 100, the drain pump 95 is driven, and the water W injected into the drain pan 94 by the drain pump 95 is discharged through the drain piping 98. The operator can confirm that the drain pump 95 is draining the water W from the drain pan 94 by, for example, looking at the transparent visualization portion 98a of the drain piping 98 from outside the indoor unit 90a and confirming that the water W is flowing through the transparent visualization portion 98a. This allows the operator to confirm that the drain pump 95 is operating normally. Note that if the operator cannot confirm that the drain pump 95 is discharging the water W, the operator can, for example, assume that there may be some abnormality in the drain pump 95, stop the drain discharge inspection, and inspect the drain pump 95.

[0064] After turning on the pump drive switch 40 and confirming that the drain pump 95 is discharging the water W, the operator checks whether the first notification unit 51, which is a light-emitting element, has turned off (step S8). If the first notification unit 51 remains emitting light (step S8: NO), the operator maintains the current state. On the other hand, if the first notification unit 51 has turned off (step S8: YES), the operator checks whether the drain pump 95 has stopped discharging the water W (step S9). Specifically, the operator checks whether the discharge of the water W has stopped by, for example, looking at the transparent visualization unit 98a, as in step S7 described above. By confirming that the first notification unit 51 has turned off, the operator can confirm that the water level in the drain pan 94 has dropped below the threshold and that the float switch 96 is operating normally.

[0065] If water W is flowing in the transparent visualization section 98a and the drain pump 95 has not stopped discharging the water W (step S9: NO), the operator maintains the current state. On the other hand, if water W is not flowing in the transparent visualization section 98a and the drain pump 95 has stopped discharging the water W (step S9: YES), the operator turns the pump drive switch 40 of the drain discharge inspection device 100 to the OFF state (step S10). In other words, the drain discharge inspection method of this embodiment includes turning the pump drive switch 40 to the OFF state at least after the first notification unit 51 indicates that the float switch 96 has turned OFF. This stops the drain pump 95, and the drain discharge inspection using the drain discharge inspection device 100 is completed.

[0066] According to this embodiment, the drain discharge inspection device 100 comprises a battery storage section 30 capable of detachably holding at least one battery 80, a battery connector section 60 to which a mobile battery MB can be electrically connected, a voltage conversion section 21 capable of converting the output voltage of the multiple batteries 80 held in the battery storage section 30 and the output voltage of the mobile battery MB connected to the battery connector section 60 into a driving voltage for a drain pump 95, a pump connector section 71b to which the drain pump 95 can be electrically connected and which is electrically connected to the voltage conversion section 21, a pump drive switch 40 which, in the ON state, electrically connects the voltage conversion section 21 and the pump connector section 71b and electrically disconnects the voltage conversion section 21 and the pump connector section 71b in the OFF state, a switch connector section 72b to which a float switch 96 can be electrically connected and which is electrically connected to the battery storage section 30 and the battery connector section 60, and a first notification section 51 capable of notifying the state of the float switch 96. When a drain pump 95 is connected to the pump connector portion 71b and the pump drive switch 40 is in the ON state, the drain pump 95 is supplied with the output voltage of the plurality of batteries 80 or the output voltage of the mobile battery MB via the voltage conversion portion 21. When a float switch 96 is connected to the switch connector portion 72b and the float switch 96 is in the ON state, the float switch 96 is supplied with the output voltage of the plurality of batteries 80 or the output voltage of the mobile battery MB.

[0067] Therefore, when using the drain drainage inspection device 100, both the mobile battery MB and the multiple batteries 80 can be used as versatile power sources to supply power to the drain pump 95 and float switch 96. As a result, even if the mobile battery MB is forgotten, the connection cable MBa connecting the mobile battery MB to the drain drainage inspection device 100 is forgotten, or the mobile battery MB runs out of charge, the multiple batteries 80 can be used to perform the above-described drain drainage inspection of the indoor unit 90a using the drain drainage inspection device 100, i.e., test run of the drain pump 95 and check the operation of the float switch 96. This improves the convenience of the drain drainage inspection device 100. Furthermore, by pre-loading the multiple batteries 80 into the battery housing 30 of the drain drainage inspection device 100, there is no need to load the multiple batteries 80 into the battery housing 30 if the mobile battery MB is forgotten, further improving convenience.

[0068] Furthermore, in the past, even if a target amount of water W to be poured into the drain pan 94 during a drain discharge inspection was determined, it was sometimes difficult to adjust the amount of water W when the type of indoor unit 90a being tested was different. In contrast, in the present embodiment, a first notification unit 51 capable of notifying the state of the float switch 96 is provided. Therefore, the operator can easily know the state of the float switch 96 via the first notification unit 51 during a drain discharge inspection. This allows the operator to easily grasp the target amount of water to be poured into the drain pan 94 when pouring water W into the drain pan 94 during a drain discharge inspection. This effectively prevents the operator from pouring too much water W into the drain pan 94, thereby preventing the water W from overflowing from the drain pan 94.

[0069] Furthermore, for example, in the past, when checking the operation of the float switch 96, it was necessary to remove the drain pan 94, move the float portion 96e of the float switch 96, and measure the resistance value of the float switch 96 using a tester or the like, which was a time-consuming process. In contrast, in this embodiment, the operation of the float switch 96 can be easily checked by checking the state of the float switch 96 using the first notification unit 51.

[0070] Furthermore, according to this embodiment, the drain discharge inspection device 100 includes a detection unit 22 capable of detecting that a mobile battery MB is connected to the battery connector unit 60, and a cutoff unit 23 capable of interrupting the electrical connection between the battery accommodating unit 30 and the voltage conversion unit 21 and the electrical connection between the battery accommodating unit 30 and the switch connector unit 72b. When the detection unit 22 detects that a mobile battery MB is connected to the battery connector unit 60, the cutoff unit 23 interrupts the electrical connection between the battery accommodating unit 30 and the voltage conversion unit 21 and the electrical connection between the battery accommodating unit 30 and the switch connector unit 72b. Therefore, when the mobile battery MB is connected to the battery connector unit 60, the battery accommodating unit 30 can be prevented from being electrically connected to the voltage conversion unit 21 and the switch connector unit 72b. This prevents a double connection in which both the mobile battery MB and the multiple batteries 80 are electrically connected to the voltage conversion unit 21 and the switch connector unit 72b, thereby preventing problems caused by such a double connection. Problems resulting from this dual connection include, for example, current flowing from the multiple batteries 80 to the mobile battery MB, and current flowing from the mobile battery MB to the multiple batteries 80. This can prevent the mobile battery MB from breaking down and the batteries 80 from leaking. Furthermore, when the mobile battery MB is connected, even if multiple batteries 80 are held in the battery housing 30, consumption of power from the multiple batteries 80 can be prevented.

[0071] Furthermore, according to this embodiment, the drain discharge inspection device 100 includes a sleep suppression unit 24 configured to continuously supply a load current to the mobile battery MB when the mobile battery MB is connected to the battery connector unit 60. Here, the mobile battery MB may be configured to enter a sleep state if it remains in an unloaded state for a certain period of time or longer. If the mobile battery MB enters a sleep state after being connected to the drain discharge inspection device 100, voltage may not be supplied to the drain pump 95 and the float switch 96 during the drain discharge inspection. In contrast, in this embodiment, the sleep suppression unit 24 can continuously supply a load current to the mobile battery MB connected to the battery connector unit 60. Therefore, when the mobile battery MB is connected to the drain discharge inspection device 100, the mobile battery MB will not enter an unloaded state and the mobile battery MB can be prevented from entering a sleep state. In particular, in this embodiment, since a load current can be continuously supplied to the mobile battery MB, unlike when a load current is supplied to the mobile battery MB at predetermined intervals, the mobile battery MB can be prevented from entering a sleep state regardless of the set time for entering a sleep state when the mobile battery MB is in an unloaded state. Therefore, regardless of the type of mobile battery MB used, the mobile battery MB can be effectively prevented from entering a sleep state.

[0072] Furthermore, according to this embodiment, the battery housing 30 can hold multiple cylindrical batteries 80 connected in series. Therefore, for example, versatile AA batteries can be used as the batteries 80. Even if the battery 80 inserted in the battery housing 30 runs out of power, a new battery 80 can be purchased at a store near the work site and replaced. Furthermore, for example, rechargeable batteries such as AA batteries can be used as the batteries 80. In this case, the batteries 80 can be used repeatedly by charging them, thereby reducing the cost of the batteries 80 compared to using disposable dry batteries as the batteries 80. Furthermore, connecting the multiple batteries 80 in series can increase the output voltage of the multiple batteries 80. This allows the output voltage of the multiple batteries 80 to approach the drive voltage of the drain pump 95. Therefore, less power is required when the voltage conversion unit 21 boosts the output voltage of the multiple batteries 80. This reduces the power consumption of the multiple batteries 80 and facilitates extending the life of the multiple batteries 80.

[0073] Furthermore, according to this embodiment, the first notification unit 51 is a light-emitting element that emits light when voltage is supplied to the float switch 96 via the switch connector 72b. Therefore, the first notification unit 51 can preferably use light to notify that the float switch 96 has turned ON when voltage is supplied to the float switch 96. This allows the operator to easily and preferably confirm that a sufficient amount of water W has been poured into the drain pan 94 when pouring water W into the drain pan 94 during a drain discharge inspection.

[0074] Furthermore, according to this embodiment, the drain discharge inspection device 100 includes a second notification unit 52 capable of notifying the operator of the state of the drain pump 95. Therefore, the operator can easily know from the second notification unit 52 whether the pump drive switch 40 is in the ON state. This allows the operator to conveniently switch the state of the pump drive switch 40 during a drain discharge inspection. Furthermore, since the second notification unit 52 is provided separately from the first notification unit 51 capable of notifying the operator of the state of the float switch 96, the operator can be notified of the state of the drain pump 95 and the state of the float switch 96 separately and independently. This allows the operator to conveniently check the state of the drain pump 95 and the state of the float switch 96, further improving the convenience of the drain discharge inspection device 100.

[0075] Furthermore, according to the present embodiment, the second notification unit 52 is a light-emitting element that emits light when voltage is supplied to the drain pump 95 via the pump connector 71b. Therefore, when voltage is supplied to the drain pump 95, the second notification unit 52 can preferably use light to notify that the drain pump 95 is ready to operate. This allows the operator to easily and preferably check the operating state of the drain pump 95 by looking at the second notification unit 52.

[0076] Furthermore, according to this embodiment, the drain discharge inspection method includes connecting a drain pump 95 to the pump connector portion 71b of the drain discharge inspection device 100 and connecting a float switch 96 to the switch connector portion 72b, pouring water W into the drain pan 94 until the first alarm unit 51 indicates that the float switch 96 has turned ON, turning the pump drive switch 40 to the ON state after the pouring of water W into the drain pan 94 has stopped, and turning the pump drive switch 40 to the OFF state after at least the first alarm unit 51 indicates that the float switch 96 has turned OFF. Therefore, the operator can pour water W into the drain pan 94 and switch the state of the pump drive switch 40 at an appropriate timing based on the state of the first alarm unit 51. Therefore, the operator can preferably perform a drain discharge inspection using the drain discharge inspection device 100.

[0077] Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the configurations of the above-described embodiments, and the following configurations and methods may also be adopted.

[0078] The number of batteries that can be held in the battery housing section is not particularly limited, as long as it is one or more. The number of batteries held in the battery housing section may be, for example, four. In this case, it is easier to miniaturize the battery housing section and the drain discharge inspection device than when the number of batteries is six. On the other hand, when the number of batteries is six as in the above-described embodiment, the output voltage of the multiple batteries connected in series can be brought closer to the driving voltage of the drain pump than when the number of batteries is four. Therefore, when the number of batteries is six, it is easier to extend the life of the multiple batteries than when the number of batteries is four. The type of battery held in the battery housing section is not particularly limited.

[0079] The voltage conversion unit may supply the output voltage to the drain pump without converting it if the output voltage input from the battery or mobile battery is the same as the drive voltage of the drain pump. The voltage conversion unit may step down the output voltage and convert it to the drive voltage of the drain pump if the output voltage input from the battery or mobile battery is higher than the drive voltage of the drain pump.

[0080] The first notification unit capable of notifying the state of the float switch may have any configuration as long as it can notify the state of the float switch. For example, the first notification unit may notify the state of the float switch by sound, or may have a display unit and notify the state of the float switch by displaying text on the display unit.

[0081] The second notification unit capable of notifying the state of the drain pump may have any configuration as long as it can notify the state of the drain pump. For example, the second notification unit may notify the state of the drain pump by sound, or may have a display unit and notify the state of the drain pump by displaying text on the display unit. The second notification unit does not necessarily have to be provided.

[0082] The indoor unit for which the drain discharge inspection is performed by the drain discharge inspection device of the present disclosure may be any type of indoor unit as long as it is equipped with a drain pump and a float switch. The indoor unit may be a ceiling-suspended indoor unit.

[0083] The relative positional relationships and dimensions of the various components described in the above-described embodiments are merely examples, and the relative positional relationships and dimensions of the various components in the present disclosure are not particularly limited as long as they are within the scope of the technical concept of the present disclosure. The configurations and methods described in this specification can be combined as appropriate within the scope of not mutually contradicting each other.

[0084] 21...voltage conversion unit, 22...detection unit, 23...cutoff unit, 24...sleep suppression unit, 30...battery storage unit, 40...pump drive switch, 51...first notification unit, 52...second notification unit, 60...battery connector unit, 71b...pump connector unit, 72b...switch connector unit, 80...battery, 90...air conditioner, 90a...indoor unit, 94...drain pan, 95...drain pump, 96...float switch, 100...drain discharge inspection device, MB...mobile battery, W...water

Claims

1. A drain discharge inspection device for use with an indoor unit of an air conditioner, the device comprising: a drain pump capable of discharging water from inside a drain pan; and a float switch that switches between an ON state and an OFF state depending on the water level in the drain pan; a battery housing portion capable of detachably holding at least one battery; a battery connector portion to which a mobile battery can be electrically connected; a voltage conversion unit capable of converting the output voltage of the at least one battery held in the battery accommodating unit and the output voltage of the mobile battery connected to the battery connector unit into a drive voltage for the drain pump; a pump connector unit to which the drain pump can be electrically connected and which is electrically connected to the voltage conversion unit; a pump drive switch that electrically connects the voltage conversion unit and the pump connector unit in an ON state and electrically disconnects the voltage conversion unit and the pump connector unit in an OFF state; a switch connector portion to which the float switch can be electrically connected and which is electrically connected to the battery accommodating portion and the battery connector portion; a first notification unit capable of notifying the state of the float switch; Equipped with When the drain pump is connected to the pump connector unit and the pump drive switch is in an ON state, the drain pump is supplied with the output voltage of the at least one battery or the output voltage of the mobile battery via the voltage conversion unit; A drain discharge inspection device in which, when the float switch is connected to the switch connector portion and the float switch is turned ON, the output voltage of the at least one battery or the output voltage of the mobile battery is supplied to the float switch, regardless of whether the pump drive switch is turned ON or OFF.

2. a detection unit capable of detecting that the mobile battery is connected to the battery connector unit; a disconnecting unit that can disconnect an electrical connection between the battery accommodating unit and the voltage converting unit and an electrical connection between the battery accommodating unit and the switch connector unit; Equipped with The drain discharge inspection device of claim 1, wherein the cut-off unit cuts off the electrical connection between the battery accommodating unit and the voltage conversion unit and the electrical connection between the battery accommodating unit and the switch connector unit when the detection unit detects that the mobile battery is connected to the battery connector unit.

3. The drain discharge inspection device of claim 1, further comprising a sleep suppression unit configured to constantly flow a load current to the mobile battery when the mobile battery is connected to the battery connector unit.

4. 2. The drain discharge inspection device according to claim 1, wherein the battery housing portion is capable of holding a plurality of cylindrical batteries connected in series.

5. 2. The drain discharge inspection device according to claim 1, wherein the first notification unit is a light-emitting element that emits light when a voltage is supplied to the float switch via the switch connector unit.

6. The drain discharge inspection device according to claim 1 , further comprising a second notification unit capable of notifying a state of the drain pump.

7. The drain discharge inspection device according to claim 6 , wherein the second notification unit is a light-emitting element that emits light when a voltage is supplied to the drain pump via the pump connector unit.

8. A drain discharge inspection method for an indoor unit of an air conditioner equipped with a drain pump capable of discharging water from inside a drain pan and a float switch that switches between an ON state and an OFF state depending on the water level in the drain pan, comprising:

8. The drain discharge inspection device according to claim 1, wherein the drain pump is connected to the pump connector portion and the float switch is connected to the switch connector portion; pouring water into the drain pan until the first notification unit indicates that the float switch is in an ON state; After stopping the injection of water into the drain pan, turning on the pump drive switch; Turning the pump drive switch to an OFF state at least after the first notification unit has reached a state indicating that the float switch has turned to an OFF state; A drainage inspection method, including: