JP5124384B2 - air conditioner - Google Patents

Description

  The present invention relates to an air conditioner, and in particular, includes an indoor unit including an indoor unit main body, a heat exchanger fixed to the indoor unit main body, a drain pan that covers a lower part of the heat exchanger, and a decorative panel that covers a lower part of the indoor unit main body. The present invention relates to an air conditioner in which an indoor unit body is installed on a ceiling.

  As a relatively large air conditioner used in an office or the like, a ceiling cassette type, a ceiling embedded type, and a ceiling suspended type air conditioner in which an indoor unit main body is installed on a ceiling are often found. These air conditioners are usually composed of an indoor unit and an outdoor unit, and both are provided with heat exchangers. During the cooling operation, dew condensation water (hereinafter referred to as drain water) is generated by condensation of water vapor contained in the air passing through the heat exchanger, and therefore, the indoor unit has a drain pan for collecting drain water. Installed under the heat exchanger.

  Air conditioners are installed on the ceiling, although maintenance work such as indoor unit operation checks (fans, heat exchangers, etc.), decorative panels, drain pans, heat exchangers, etc. are cleaned and replaced regularly. The air conditioner that needs to be installed on a stepladder or the like requires work at a high place. Such high-altitude work is performed very carefully so as not to fall from a stepladder or the like, so the work load is very large and takes a long time.

  A commonly used ceiling cassette type air conditioner (indoor unit) has a configuration as shown in FIG. The indoor unit is installed by fitting the indoor unit main body 16 into the opening of the ceiling plate 35, and the indoor unit main body 16 includes a blower fan 17 and a first heat exchanger 13 (a heat exchanger installed in an outdoor unit described later). As a second heat exchanger). A decorative panel 40 is screwed below the indoor unit main body 16, and a drain pan fixture 41 and an indoor unit fixed drain pan 42 (supported by the drain pan fixture 41) below the first heat exchanger 13 ( Hereinafter, the drain pan 42 is installed. For example, when cleaning the drain pan 42 and the first heat exchanger 13, the operator removes the screwed decorative panel 40 and further removes the drain pan fixture 41 and the drain pan 42 on the stepladder. Must be implemented. In view of such circumstances, several systems have been devised for the purpose of improving work efficiency and work safety.

  For example, in Patent Document 1, in a ceiling-embedded air conditioner in which a plurality of unit bodies are embedded in a ceiling, a wireless remote controller, a light receiving unit that receives a signal from the remote control, and a unit setting provided in the light receiving unit and the remote control And a suction grill provided on the unit main body set by the unit setting means among the plurality of unit main bodies to be lowered by a predetermined distance and stopped. There is disclosed a ceiling-embedded air conditioner comprising a descent distance setting means that can set a plurality of steps. Patent Documents 2 to 5 also disclose a ceiling-embedded type air conditioner including a grill lifting / lowering unit that lifts and lowers a suction grill of a decorative panel, as in Patent Document 1.

JP 2001-21173 A JP 2000-74459 A Japanese Patent Laid-Open No. 2001-21206 JP 2005-3364 A JP 2007-255887 A

  According to the ceiling-embedded air conditioners described in Patent Documents 1 to 5, the suction grill (22 shown in FIG. 6) of the decorative panel can be automatically raised and lowered by a remote control operation, etc., and the burden of maintenance work is reduced. Although it does not fully satisfy the need for simplification and speeding up of the maintenance work, there is still room for improvement. As described above, maintenance work for indoor units includes work to clean the drain pan and remove the drain pan. In such a case, the drain pan is removed (and attached) at a high place using a stepladder. Will occur. The work such as removing the drain pan at a high place usually requires two workers, and takes a long time because it is carried out carefully in consideration of safety. As described above, according to the prior art, it is difficult to sufficiently improve the efficiency of the maintenance work.

  The objective of this invention is providing the air conditioner which can raise / lower a drain pan automatically and can improve the efficiency of a maintenance work significantly.

An air conditioner according to the present invention includes an indoor unit including an indoor unit main body, a heat exchanger fixed to the indoor unit main body, and a drain pan that covers a lower portion of the heat exchanger, and the indoor unit main body is installed on a ceiling portion The air conditioner has a suspension wire that suspends the drain pan from the indoor unit main body, and a drive actuator that winds and sends the suspension wire, and by operating the drive actuator, the drain pan automatically moves up and down, Furthermore, the indoor unit is provided with a drain water detector that detects the drain water collected in the drain pan, and restricts the operation of the drive actuator when the drain water amount is detected by the drain water detector. characterized in that it.

The indoor unit main body includes an indoor unit including an indoor unit main body, a heat exchanger fixed to the indoor unit main body, a drain pan that covers a lower portion of the heat exchanger, and a decorative panel that covers a lower portion of the indoor unit main body. In the air conditioner installed on the ceiling, the decorative panel is a drain pan integrated decorative panel with a drain pan installed on the upper surface, a hanging wire for hanging the drain pan integrated decorative panel from the indoor unit body, and a hanging wire And a drive actuator that winds and feeds out, and when the drive actuator operates, the drain pan-integrated decorative panel automatically moves up and down, and the indoor unit detects drain water collected in the drain pan. A drain water detector is provided, and when the drain water detector detects a drain water amount above a specified level, it limits the operation of the drive actuator. That it is preferable.

  In addition, the drive actuator is installed on the outer upper surface of the indoor unit main body, connected to the drive actuator, the end extending from the indoor unit main body, and rotating by the operation of the drive actuator, and the end of the drive shaft A wire drum to which one end of a hanging wire is fixed, and the other end of the hanging wire is fixed to an edge portion extending from the indoor unit body portion of the drain pan integrated decorative panel. It is preferable that the drain pan-integrated decorative panel is automatically raised and lowered by operating the drive actuator and winding the suspension wire around the wire drum or feeding it from the wire drum.

  In addition, the drain pan is provided with a discharge unit that discharges the collected drain water. When the drain water detector detects a drain water amount of a predetermined amount or more, the operation of the drive actuator is prohibited and the discharge unit When the amount of drain water becomes less than a predetermined amount after opening, it is preferable that the operation prohibition state of the drive actuator is canceled.

  The air conditioner according to the present invention has a suspension wire that suspends the drain pan from the indoor unit main body, and a drive actuator that winds and sends the suspension wire, and the drain pan is operated by operating the drive actuator. Since it automatically moves up and down, the efficiency of maintenance work can be greatly improved. Work such as removal or attachment of a drain pan at a high place using a stepladder or the like is not required, and maintenance work can be performed by one person.

  In addition, a drain pan integrated decorative panel having a drain pan installed on the upper surface, a hanging wire that suspends the drain pan integrated decorative panel from the indoor unit body, and a drive actuator that winds and sends the hanging wire, If the drain pan-integrated decorative panel is automatically raised and lowered by the actuation of the drive actuator, it is possible to eliminate or reduce work at high places even in an indoor unit having a decorative panel, and to perform simple and quick maintenance work. Can be realized. Moreover, since the drain pan and the decorative panel can be lifted and lowered simultaneously, the working time can be greatly shortened.

  Furthermore, the drive actuator is installed on the outer upper surface of the indoor unit main body, is connected to the drive actuator, has an end that extends from the indoor unit main body, and rotates by the operation of the drive actuator, and an end of the drive shaft A wire drum to which one end of a hanging wire is fixed, and the other end of the hanging wire is fixed to an edge portion extending from the indoor unit body portion of the drain pan integrated decorative panel. If the drive actuator is operated so that the hanging wire is wound around the wire drum or sent out from the wire drum, the installation of the drive mechanism is easy and the maintainability is also improved. Further, the drive mechanism can be attached to an existing air conditioner by a small improvement without disturbing the maintenance work of the heat exchanger or the blower fan, for example.

  In addition, the indoor unit is provided with a drain water detector that detects drain water collected in the drain pan. When the drain water detector detects a drain water amount of a predetermined amount or more, the operation of the drive actuator is performed. If the configuration is limited, the drain pan can be lowered without spilling the collected drain water, and the working efficiency can be further improved.

  Further, the drain pan is provided with a discharge unit for discharging the collected drain water. When the drain water detector detects a drain water amount of a predetermined amount or more, the operation of the drive actuator is prohibited and the discharge unit If the drain water amount becomes less than the predetermined amount when the valve is opened, the operation prohibition state of the drive actuator can be canceled to reliably prevent the collected drain water from spilling when the drain pan is lowered. can do. Moreover, the operation prohibition state of the drive actuator (drive mechanism) can be easily released by opening the discharge part and discharging the drain water.

  Embodiments according to the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic diagram showing a ceiling-embedded air conditioner equipped with a drain pan-integrated decorative panel and an automatic lifting mechanism of the drain pan-integrated decorative panel, and FIG. It is a figure which shows a mode that a body-type decorative panel is raised / lowered automatically. FIG. 3 is a top view of the drain pan-integrated decorative panel. FIG. 4 is an enlarged view of a main part of the drain pan-integrated decorative panel (portion where the drain cock 29 and the float switch 30 are provided).

  Relatively large air conditioners used in offices are often installed on the ceiling. For example, ceiling cassette type air conditioners that are installed in the ceiling are easy to construct and have excellent interior characteristics. Widely used. In FIG. 1 and the like, this ceiling cassette type air conditioner is shown. Hereinafter, the air conditioner will be described as a ceiling cassette type air conditioner 10 (hereinafter simply referred to as an air conditioner 10). In addition, the raising / lowering mechanism etc. of the drain pan 20 mentioned later can be applied also to a ceiling embedded type or a ceiling hanging type air conditioner. Hereinafter, the operation state of the air conditioner 10 will be described as a cooling operation.

  As shown in FIG. 1, the air conditioner 10 includes an indoor unit 11 and an outdoor unit 12. The indoor unit 11 is provided with a first heat exchanger 13 that evaporates and vaporizes the liquefied refrigerant supplied from the outdoor unit 12, and the outdoor unit 12 compresses the refrigerant vaporized by the first heat exchanger 13. The compressor which does not carry out, the 2nd heat exchanger 14 which condenses and liquefies the compressed vaporization refrigerant | coolant, the expansion valve which is not shown in figure which expands and cools a liquefied refrigerant | coolant are installed, and those apparatuses are connected by the refrigerant | coolant piping 15. FIG.

  The indoor unit 11 is provided with an indoor unit main body 16 that is a housing (box) that forms an outer shape and is installed in an opening of the ceiling plate 35. The indoor unit main body 16 is provided with a blower fan 17, a blower fan motor 18 that rotationally drives the blower fan 17, and the first heat exchanger 13 described above. The blower fan 17 is a centrifugal fan installed inside the first heat exchanger 13 and has a function of sending the sucked-up indoor air to the surrounding first heat exchanger 13. The cooled air that has passed through the first heat exchanger 13 is cooled and supplied to the room from the outlet 21 of the drain pan-integrated decorative panel 19 described later.

  The indoor unit 11 includes a drain pan integrated decorative panel 19 that covers a lower portion of the indoor unit body 16. The decorative panel has a function of covering the blower fan 17 and the first heat exchanger 13 installed in the indoor unit main body 16 so as not to be seen from the indoor side. In addition to its concealing function, the drain pan-integrated decorative panel 19 is connected and integrated with a drain pan 20 on the upper surface of a panel base material (hereinafter, the base material forming the outer shape of the drain pan-integrated decorative panel 19 is referred to as a panel base material). By doing so, it also has a function of the drain pan 20. The drain pan-integrated decorative panel 19 preferably has a size (area) that completely covers the lower side of the indoor unit body 16 and is larger than the size of the lower surface portion (opening portion of the box) of the indoor unit body 16. Is set as follows.

  The drain pan 20 provided on the upper surface of the panel base material is a member having a function of collecting condensed water (drain water) due to condensation of water vapor contained in the air passing through the cooled first heat exchanger 13. Therefore, the drain pan 20 is installed on the upper surface of the panel at a position covering the lower side of the first heat exchanger 13 in order to collect drain water. As a method of installing the drain pan 20 on the upper surface of the panel base material, as long as the drain pan 20 can be installed without deviating from the position covering the lower side of the first heat exchanger 13, it is not particularly limited. It can be installed (integrated) by a method such as fixing with a tape, an adhesive, a screw, or the like, or integrally forming with a panel. In this way, by integrating the drain pan and the decorative panel, both can be lifted and lowered simultaneously by the lifting mechanism described later, so that the working time can be greatly shortened.

  The drain pan-integrated decorative panel 19 includes an air outlet 21 for blowing cool air cooled by the first heat exchanger 13 into the room, an intake air, as in a normal decorative panel (see the decorative panel 40 in FIG. 6). A suction grille 22 which is a mouth is provided. Note that a wind direction adjusting plate for adjusting the wind direction can be installed at the air outlet 21, and a filter for capturing dust can be installed at the suction grill 22.

  Since the drain pan 20 has a function of collecting drain water as described above, the drain pan 20 has a shape having a wall portion protruding upward. Moreover, although the drain pan 20 can be comprised from various plastics, foamed plastics, such as a polystyrene foam, metals, such as stainless steel, it is preferable to comprise from foamed plastics, such as a polystyrene foam, from a viewpoint of weight reduction. It should be noted that a reinforcing plate or a reinforcing frame made of metal, high-strength plastic, or the like can be provided at a portion of the panel base material where the drain pan 20 is installed.

  The drain water collected in the drain pan 20 is drained naturally using an inclination of a drain pipe (not shown), or is forcibly sucked up by a drain pump (not shown) and drained through the drain pipe. In the air conditioner 10, it is preferable to apply the latter drainage method using a drain pump in order to facilitate the automatic raising and lowering of the drain pan 20. For example, the drain pump is installed in the indoor unit body 16, and the drain piping is used. The drain pan 20 can be inserted from above. The drain pump can be operated periodically or in conjunction with the float switch detecting a predetermined amount of water. In addition, as a float switch, the float switch for raising / lowering control fixed to the indoor unit main body 16 mentioned later, or another float switch can be used.

  The air conditioner 10 includes an automatic lifting mechanism for the drain pan-integrated decorative panel 19 provided in the indoor unit 11. The indoor unit 11 includes a suspension wire 23 that suspends the drain pan-integrated decorative panel 19 from the indoor unit body 16, and a lift motor unit 24 that serves as a drive actuator that winds and sends the suspension wire 23. One end of the hanging wire 23 is installed on the upper surface of the drain pan integrated decorative panel 19, specifically, an edge extending from the indoor unit body 16, and the other end is fixed to a wire drum 27 described later. . The elevating motor unit 24 is a driving device having a driving system such as an electric motor and gears, and can be installed on the outer upper surface of the indoor unit main body 16 as shown in FIG. Here, the outer upper surface portion of the indoor unit main body 11 means an outer surface facing upward in a state where the indoor unit main body 16 is installed on the ceiling. A blower fan motor 18 and the like are installed on the inner upper surface.

  Two drive gears 26 are installed at both ends of a shaft 25 that is connected to the rotating shaft of the electric motor directly or via a drive system and extends from both sides of the lift motor unit 24. By operating the lifting motor unit 24 (electric motor), the shaft 25 and the drive gear 26 are rotated, and the two wire drums 27 installed on the outer side surface portion of the indoor unit body 16 are rotated via the passive gear 28. Let The passive gear 28 is coupled to the wire drum 27, and the passive gear 28 is engaged with the drive gear 26. Therefore, the rotational force of the drive gear 26, that is, the power of the lifting motor unit 24 is applied to the suspension wire. One end of 23 can be transmitted to a fixed wire drum 27. Accordingly, by operating the lifting motor unit 24, the hanging wire 23 is sent out from the wire drum 27, and the drain pan integrated decorative panel 19 can be lowered as shown in FIG.

  As described above and shown in FIG. 1, the lifting motor unit 24 that is a drive actuator of the automatic lifting mechanism is installed on the outer upper surface of the indoor unit body 16, and the shaft 25 connected to the lifting motor unit 24 has both ends thereof. Extends from the indoor unit body 16 and is connected to the wire drum 27 via drive gears 26 and the like installed at both ends of the shaft 25. With such a configuration, it is easy to install an automatic lifting mechanism including the lifting motor unit 24 and the wire drum 27, and the maintenance workability inside the automatic lifting mechanism and the indoor unit main body 16 is also good.

  The power transmission mechanism (drive system) from the lifting motor unit 24 to the wire drum 27 is not limited to a mechanism using the drive gear 26 and the passive gear 28, and various forms can be applied. For example, a power transmission mechanism using a chain and sprocket, a pulley and a belt can be used, and the wire drum 27 can be directly installed at both ends of the shaft 25.

  The hanging wire 23 having one end fixed to the wire drum 27 is connected to the edge of the drain pan-integrated decorative panel 19, specifically, to the outer portion that protrudes from the width of the indoor unit body 16. As shown in FIG. 1 and the like, the other ends of the suspension wires 23 are fixed to the edge portions along the opposite sides of the square panel in order to raise and lower the drain pan-integrated decorative panel 19 horizontally and stably. It is preferable to have four fixing points at positions close to the four corners of the panel. As a configuration having four fixing points of the hanging wire 23 at the four corners (positions close to the four corners) of the drain pan integrated decorative panel 19, a configuration using four hanging wires 23 and four wire drums 27, The structure etc. which use the two wire drums 27 and the two hanging wires 23 branched from the middle part (four in the branched part or less) are mentioned. Note that it is preferable to apply the latter configuration from the viewpoints of cost reduction by reducing the number of parts and simplification of maintenance.

  The elevating motor unit 24 can be operated, for example, by a maintenance operator pressing an elevating button (operation switch). Such a lift button may be provided in a controller or the like that is wired to the lift motor unit 24. Moreover, as shown in FIG. 2, it can also be set as the structure provided with the raising / lowering operation remote control 31 and the light-receiving part 32. FIG. By installing the light receiving unit 32 that receives signal light such as infrared light from the lifting operation remote controller 31 by turning on the lifting button provided on the lifting operation remote controller 31, the indoor unit body 16 is installed. Can do. The drain pan integrated decorative panel 19 is preferably provided with a light receiving window 33 for transmitting signal light. The light receiving window 33 is an opening formed in the panel base material, and can be left open, that is, can be a simple hole, but a highly transparent plastic plate or the like is installed to prevent cold air from blowing out. It is preferable to do.

  The descending width of the drain pan-integrated decorative panel 19 can be determined in consideration of improvement in workability, installation conditions of the indoor unit 11, etc., and driving of the lifting motor unit 24 that adjusts the length of the hanging wire 23. The time is set manually (for example, the lift motor unit 24 is activated only while the lift button is pressed), or the descending width is set in advance (for example, until the lift button reaches a predetermined position once it is operated) It can be arbitrarily changed by, for example, operating the lifting motor unit 24).

  As shown in FIG. 3, the drain pan 20 installed on the upper surface of the panel base material is installed around the suction grill 22 so as to cover the entire lower part of the first heat exchanger 13. Outside the drain pan 20, air outlets 21 are installed in four directions, and a light receiving window 33 is formed in a portion located below the light receiving portion 32.

  As shown in FIGS. 3 and 4, a drain pan 20 includes a drain hole 29 with a cock (hereinafter referred to as a drain cock 29) as a discharge part for discharging drain water, and a drain water detector. The float switch 30 is installed. The float switch 30 is fixed to the indoor unit main body 16 by a fixture 36 or the like, and a detection unit (float unit) is inserted on the drain pan 20. As the drain water detector (float switch 30), various float switches 30 can be used as long as the amount of drain water can be detected. Further, a plurality of float switches 30 are provided to set a plurality of drain water amount detection standards, or a plurality of drain water amount detection standards are set using a single float switch 30 (a float switch capable of detecting a plurality of water amounts). Can also be used).

  The drain cock 29 is installed to discharge drain water, for example, when driving of the lifting motor unit 24 is prohibited by a lifting control device described later. That is, when the driving of the lifting motor unit 24 is prohibited, it is used as a means for canceling the driving prohibited state. The drain pan integrated decorative panel 19 is provided with a drain cock operating port 34 for opening and closing the drain cock 29. The drain cock operating port 34 is preferably provided with a lid for concealing the drain cock 29 and the like.

  As described above, the indoor unit 11 is provided with a drain water detector that detects the drain water collected in the drain pan 20, and when the drain water detected by the drain water detector is a predetermined amount or more. It is preferable to provide a lifting control device (not shown) having a function of prohibiting or restricting the operation of the lifting mechanism (lifting motor unit 24). The lifting control device defines a CPU, an input device used for inputting control parameters, etc., a control parameter (for example, a standard for the amount of drain water for executing control) and a control program (for example, the control procedure shown in FIG. 5). A recording apparatus for storing a control program), an input / output port, and the like, and can be configured by a computer. The function of elevation control can be realized by executing software, and specifically, can be realized by executing a control program stored in a storage device. The lifting control device can be installed in the indoor unit main body 16.

  For example, when the lift control device detects that the predetermined drain water is collected by the float switch 30 during the operation of the lift operation remote controller 31, the lift control device prohibits the drive of the lift motor unit 24. Can be executed. Here, the predetermined drain water amount serving as a reference for prohibiting driving may be set in consideration of whether drain water spills due to the vibration when the drain pan integrated decorative panel 19 is lowered. preferable.

  Further, for example, it is possible to execute control for restricting driving of the lifting motor unit 24 such as reducing the driving speed of the lifting motor unit 24. For example, as described above, a plurality of drain water amount detection standards can be provided, and the driving speed of the elevating motor unit 24 can be changed or the driving can be prohibited according to the amount of water.

  As described above, when the elevating control device has a control setting for prohibiting the driving of the elevating motor unit 24, the drain cock 29 for discharging drain water may be provided as a drive prohibiting state canceling means. preferable. When the drain cock 29 is opened and the drain water amount becomes less than the predetermined amount, the float switch 30 does not detect the drain water amount above the predetermined amount, that is, the detection of the float switch 30 that is a trigger for the drive inhibition control. The signal is turned OFF, and the operation prohibition state of the lifting motor unit 24 is released.

  The operation (action) of the air conditioner 10 having the above configuration (which is configured to be lifted and lowered by the lift operation remote controller 31) will be described in detail with reference to FIG. 5 by taking cleaning maintenance of the drain pan 20 as an example. FIG. 5 is a flowchart showing an automatic lowering procedure of the drain pan-integrated decorative panel 19 and a lowering control procedure by the lifting control device.

  First, the maintenance worker turns on the lift button of the drain pan-integrated decorative panel 19 provided on the lift operation remote controller 31 (S10). As will be described later, when the lift button is turned on, the lift motor unit 24 is operated and the drain pan-integrated decorative panel 19 is operated unless there is a predetermined amount or more of drain water collected in the drain pan 20, as will be described later. The descent starts.

  The operator checks whether or not the lowering of the drain pan-integrated decorative panel 19 is started (S11). The lowering of the drain pan-integrated decorative panel 19 can be set to automatically stop at a predetermined position when the elevating button is turned on, or to be lowered only when the button is kept pressed.

  When the lowering of the drain pan integrated decorative panel 19 is not started (NO in S11), it is confirmed by the float switch 30 that a predetermined amount or more of drain water exists on the drain pan 20, and a detection signal is output from the float switch 30. Is transmitted to the lift control device, and the operation of the lift motor unit 24 is prohibited by the function of the lift control device. Note that, as described above, the lift control device can also have a control setting that restricts the operation of the lift motor unit 24.

  When the operation of the lifting / lowering motor unit 24 is prohibited, the draining cock 29 is opened from the draining cock operating port 34 of the lifting / lowering motor unit 24, and drain water is discharged (S12). By discharging drain water from the drain cock 29, the detection signal of the float switch 30 that is a trigger of the drive prohibition control is turned OFF, and the operation prohibition state of the lift motor unit 24 is released.

  Again, the operator turns on the lift button of the drain pan integrated decorative panel 19 provided on the lift operation remote controller 31 (S13), whereby the lift motor unit 24 is activated, and the drain pan integrated decorative panel 19 is set to a predetermined position. (S14).

  In addition, after completion | finish of the cleaning maintenance of the drain pan 20, an operator operates the raising / lowering motor unit 24 by turning ON the raising / lowering button again etc., raises the drain pan integrated decorative panel 19, and restores an installation state easily. be able to.

  As described above, the air conditioner 10 includes the indoor pan 11, the drain pan integrated decorative panel 19 with the drain pan 20 coupled to the upper surface, the hanging wire 23 that suspends the drain pan integrated decorative panel 19 from the indoor unit body 16, and Since the lifting / lowering motor unit 24 that winds and sends the hanging wire 23 is provided, the drain pan-integrated decorative panel 19 including the drain pan 20 automatically moves up and down, so that the efficiency of the maintenance work can be greatly improved. . Work such as removal or attachment of a drain pan at a high place using a stepladder or the like is not required, and maintenance work can be performed by one person. Moreover, when only the drain pan 20 is cleaned, it is possible to eliminate work at a high place, which not only improves work efficiency but also is preferable from the viewpoint of improving safety.

  In addition, the indoor unit 11 prohibits or restricts the operation of the lifting motor unit 24 when the float switch 30 detects a preset drain water amount, that is, a drain water amount that may spill due to vibration during the lowering operation. Since the elevating control device is provided, it is possible to further improve the work efficiency without spilling the drain water collected during the elevating.

  In the above description, the drain pan integrated decorative panel 19 in which the drain pan 20 is installed on the upper surface of the panel base material is lifted and lowered by the lift motor unit 24. However, one end of the suspension wire 23 is fixed to the drain pan 20. Further, only the drain pan 20 can be raised and lowered. In that case, a configuration in which the decorative panel is not installed or the decorative panel is manually removed can be applied.

It is a schematic diagram which shows a ceiling cassette type | formula air conditioner provided with the automatic raising / lowering mechanism of a drain pan integrated decorative panel and a drain pan integrated decorative panel. (Light receiver is omitted) In the ceiling cassette type air conditioner shown in FIG. 1, it is a figure which shows a mode that a drain pan integrated decorative panel is raised / lowered automatically. (Outdoor unit omitted) It is a top view of a drain pan integrated decorative panel. It is a principal part enlarged view of a drain pan integrated decorative panel. It is a flowchart which shows the procedure of the descent | fall control by the automatic descent | fall procedure of a drain pan integrated decorative panel, and a raising / lowering control apparatus. It is a schematic diagram which shows the cross section of the conventional ceiling cassette type | formula air conditioner (indoor unit) by which the drain pan was fixed to the indoor unit main body.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Ceiling embedded type air conditioner, 11 Indoor unit, 12 Outdoor unit, 13 1st heat exchanger, 14 2nd heat exchanger, 15 Refrigerant piping, 16 Indoor unit main body, 17 Blower fan, 18 Fan motor, 19 Drain pan integrated type Decorative panel, 20 Drain pan, 21 Air outlet, 22 Suction grill, 23 Hanging wire, 24 Lifting motor unit, 25 Shaft, 26 Drive gear, 27 Wire drum, 28 Passive gear, 29 Water drain hole with cock (water drain cock) , 30 Float switch, 31 Elevating operation remote control, 32 Light receiving unit, 33 Light receiving window, 34 Drain cock operating port, 35 Ceiling panel, 36 Fixing tool, 40 Cosmetic panel, 41 Drain pan fixing tool, 42 Indoor unit fixed drain pan

Claims (4)

In an air conditioner provided with an indoor unit including an indoor unit main body, a heat exchanger fixed to the indoor unit main body, and a drain pan covering a lower portion of the heat exchanger, and the indoor unit main body is installed on a ceiling portion,
A hanging wire that hangs the drain pan from the indoor unit body,
A drive actuator for winding and delivering the hanging wire; and
Have
By operating the drive actuator, the drain pan automatically moves up and down,
Furthermore, the indoor unit is provided with a drain water detector that detects the drain water collected in the drain pan, and restricts the operation of the drive actuator when the drain water amount is detected by the drain water detector. An air conditioner characterized by An indoor unit including an indoor unit main body, a heat exchanger fixed to the indoor unit main body, a drain pan covering a lower part of the heat exchanger, and a decorative panel covering a lower part of the indoor unit main body, the indoor unit main body being a ceiling In the air conditioner installed in the
The decorative panel is a drain pan integrated decorative panel with a drain pan installed on the top surface.
A hanging wire that suspends a drain pan integrated decorative panel from the indoor unit body,
A drive actuator for winding and delivering the hanging wire; and
Have
When the drive actuator is activated, the drain pan integrated decorative panel automatically moves up and down,
Furthermore, the indoor unit is provided with a drain water detector that detects the drain water collected in the drain pan, and restricts the operation of the drive actuator when the drain water amount is detected by the drain water detector. An air conditioner characterized by The air conditioner according to claim 2,
The drive actuator is installed on the outer upper surface of the indoor unit body,
A drive shaft connected to the drive actuator, an end portion extending from the indoor unit main body, and rotating by the operation of the drive actuator;
A wire drum connected to or installed at the end of the drive shaft and having one end of the hanging wire fixed thereto;
Have
The other end of the hanging wire is fixed to the edge extending from the indoor unit body part of the drain pan integrated decorative panel,
An air conditioner in which a drain pan-integrated decorative panel is automatically raised and lowered by actuating a drive actuator and winding a suspension wire on or from a wire drum. In the air conditioner according to any one of claims 1 to 3 ,
The drain pan is provided with a discharge unit that discharges the collected drain water.
When the drain water detector detects a drain water amount of a predetermined amount or more, it prohibits the operation of the drive actuator,
An air conditioner characterized in that the operation prohibition state of the drive actuator is canceled when the discharge portion is opened and the amount of drain water becomes less than a predetermined amount.

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