JP2008309449A - Drain pipe contamination detecting device for air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively prevent leakage of water from an air conditioner into a room in a drain pipe contamination detecting device for the air conditioner. <P>SOLUTION: A transparent piping part 4 made of transparent material is provided in two or more places in the longitudinal direction of the drain pipe 38 of the air conditioner. An optical sensor 56 for detecting light transmittance in the transparent piping part 54 is provided in the two or more places corresponding to the respective transparent piping parts 54. A detection signal from each photo sensor 56 is output to a control unit. The control unit has an abnormality determination means for determining the presence/absence of light transmittance abnormality in the transparent piping parts 54 based on the detection signal from each optical sensor 56. The control unit lights or extinguishes a second warning lamp provided on the lower side of a decorative plate 28 of the air conditioner when the abnormality determination means determines the abnormality of the light transmittance. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a drain pipe dirt detection device for an air conditioner comprising a transparent pipe portion made of a transparent material provided in a drain pipe of an air conditioner and an optical sensor for detecting light transmittance in the transparent pipe portion.

  Conventionally, as an air conditioner provided on each floor of a building, for example, there is a ceiling-mounted air conditioner. As a ceiling-mounted type, a structure in which a decorative board having a suction part and a blowing part and a box body on the upper side are fitted and installed in a ceiling called a ceiling cassette type, in a ceiling called a ceiling-embedded type There are a structure in which an indoor unit main body is embedded, a structure in which an indoor unit main body having a suction portion called a ceiling built-in type, and a duct having a blowing portion connected to the indoor unit main body are installed in the ceiling. In any case, conventionally, condensed water generated during cooling operation, that is, drain water generated by condensation of water vapor passing through the heat exchanger is collected by a drain pan as a drain pan, and the drain pipe is inclined from the drain pan. It is considered that the water is drained naturally by using it, or the drain water is forcibly sucked up by a drain pump from a drain pan and discharged to the outside through a drain pipe.

Japanese Patent Laid-Open No. 11-83758

  In the case of conventionally known ceiling-mounted air conditioners, when water accumulates in the drain pipe with long-term use, fungi, water red, dust etc. in the air are mixed in the water, etc. There is a possibility that the water becomes sticky slime and clogs the drain pipe to hinder drain water discharge. If the drain water is significantly inhibited from being discharged, it cannot be said that there is no possibility that the drain water leaks from the drain pan to the suction port side and causes water leakage in the room. On the other hand, it is considered to check the clogging of the drain piping by inspection, but checking the drain piping installed behind the ceiling is time consuming and can not be done frequently. There is a possibility that water leakage into the room cannot be effectively prevented. Further, since the drain pipe has been conventionally made of vinyl chloride or the like and is opaque, there is also a problem that the internal clogging state cannot be determined only by looking at the drain pipe from the outside. In addition to the inspection work, as a means for determining the clogging of the drain pipe, a drain sensor for detecting clogging of the drain pump is provided, and the drain water in the drain pump is a predetermined amount or more by a detection signal from the drain sensor. It is also conceivable to stop the operation of the drain pump when it is determined. However, in this case, since there is a possibility that the drain pump may stop operating other than the clogging of the drain piping, it is difficult to effectively determine the clogging state of the drain piping only by the operation state of the drain pump.

  Patent Document 1 describes that an optical densitometer that uses light to measure the transmitted light attenuation rate and scattered light increase rate to determine the concentration is used as a means for measuring the concentration of the fluid to be measured. Yes. However, Patent Document 1 does not disclose means for detecting a change in the light transmittance of the drain pipe of the air conditioner and determining whether there is a light transmittance abnormality in the detected drain pipe. In the case of such an optical densitometer described in Patent Document 1, it is not possible to detect the contamination of the drain pipe of the air conditioner and effectively prevent water leakage from the air conditioner to the room.

  An object of the present invention is to effectively prevent water leakage from an air conditioner to a room in a drain pipe dirt detection device for an air conditioner.

  A drain pipe contamination detection device for an air conditioner according to the present invention includes a transparent pipe portion made of a transparent material provided in a drain pipe of an air conditioner, a light sensor for detecting light transmittance in the transparent pipe portion, and detection from the light sensor. An apparatus for determining a drain pipe contamination of an air conditioner, comprising: an abnormality determination unit that determines whether or not there is an abnormality in light transmittance in a transparent pipe section based on a signal.

  Preferably, the information processing apparatus further includes an informing means for informing the abnormality when the abnormality is judged by the abnormality judging means.

  More preferably, air conditioner operation control means for stopping the operation of the air conditioner when abnormality is determined by the abnormality determination means is provided.

  More preferably, the apparatus includes a drain pump that sucks drain water from the suction side of the drain pipe and sends it to the discharge side of the drain pipe, and the air conditioner operation control means is at least when an abnormality is judged by the abnormality judgment means. While the fan of the air conditioner is stopped, the drain pump is kept on.

  More preferably, the transparent pipe part and the optical sensor are respectively provided at positions corresponding to a plurality of positions in the length direction of the drain pipe.

  More preferably, a drain pump is provided on the drain water upstream side of the drain pipe, and the drain pipe is connected to the rising drainage portion downstream of the drain pump and continuously from the rising drainage portion to the downstream side in the horizontal direction. And a horizontal drainage unit.

  According to the drain pipe contamination detection device for an air conditioner according to the present invention, the abnormality determination means determines that the light transmittance in the transparent pipe portion provided in the drain pipe is abnormal, so that the drain pipe is filled with an opaque liquid. It can be determined that there is some drain water and the drain pipe is dirty. In other words, the drain water becomes colored and opaque with high viscosity due to contamination of fungi, water stains, dust, etc. in the air, so this opaque drain water is excessively present in the drain pipe due to a decrease in light transmittance. Therefore, it can be determined that the drain pipe is dirty. For this reason, for example, by adopting a configuration including notification means for notifying abnormality when abnormality is determined by the abnormality determination means, the user recognizes that there is an abnormality and stops the operation of the air conditioner. Thus, it is possible to effectively prevent water leakage from the air conditioner into the room. Further, by adopting a configuration including an air conditioner operation control means for stopping the operation of the air conditioner when an abnormality is determined by the abnormality determining means, water leakage from the air conditioner to the room can be effectively prevented. In addition, even if the air conditioner is installed in the back of the ceiling, etc., where it is difficult to inspect the components of the air conditioner such as the drain pipe, the inside of the drain pipe is detected without performing the inspection work. it can.

  Further, in the configuration including the air conditioner operation control means for stopping the operation of the air conditioner when the abnormality is judged by the abnormality judging means, the drain water is sucked from the suction side of the drain pipe and sent to the discharge side of the drain pipe. The air conditioner operation control means includes a drain pump, and when an abnormality is determined by the abnormality determination means, at least the operation of the fan of the air conditioner is stopped while the operation of the fan is continued. By stopping the water leakage into the room by the fan, the drain water in the drain pan is sucked out by the operation of the drain pump, and the water leakage from the air conditioner to the room can be prevented more effectively.

  In addition, according to the configuration in which the transparent piping part and the optical sensor are provided at positions corresponding to multiple places in the length direction of the drain pipe, even if only a part of the drain pipe is dirty, it is easier to find the dirt. Water leakage from the machine to the room can be prevented more effectively.

  In addition, a drain pump provided on the drain water upstream side of the drain pipe is provided, and the drain pipe is disposed in a horizontal direction continuously from the rising drainage part to the downstream side from the rising drainage part and downstream from the drain pump. According to the configuration including the drainage unit, when the direction of the horizontal drainage unit is not inclined with respect to the horizontal direction, or when the inclination is slight, the drainage water is easily clogged in the horizontal drainage unit. Therefore, it tends to cause water leakage from the air conditioner to the room. For this reason, the effect obtained by the present invention that water leakage from the air conditioner to the room can be effectively prevented by adopting the configuration of the present invention including the transparent pipe part, the optical sensor, and the abnormality determining means is remarkable. become.

  Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings. 1 to 7 show an example of an embodiment of the present invention. FIG. 1 is a configuration diagram showing an air conditioner that detects dirt on a drain pipe by a drain pipe dirt detection device. FIG. 2 is a configuration diagram mainly showing in detail an indoor unit portion of the air conditioner in FIG. FIG. 3 is a schematic perspective view showing the indoor unit installed on the back of the ceiling with a part omitted. FIG. 4 is a perspective view of the suction port and the drain pan of FIG. 3 as viewed obliquely from above. FIG. 5 is a schematic perspective view showing the indoor unit, the drain pipe, and the optical sensor. FIG. 6 is a diagram showing the AA cross section of FIG. 5 and the configuration of a control unit for inputting a signal from an optical sensor and a warning lamp. FIG. 7 is a circuit diagram including an optical sensor and a warning lamp. In the following description, the case where the air conditioner is a ceiling cassette type will be described. However, the present invention is not limited to the case where the air conditioner that detects dirt on the drain pipe is a ceiling cassette type. For example, a ceiling-embedded structure that embeds an indoor unit main body having a heat exchanger and a blow-out part in the ceiling, a ceiling built-in indoor unit main body that has a suction part, and an indoor unit main body connected The present invention can also be applied to a configuration for detecting dirt on drain pipes of various air conditioners such as a structure in which ducts having blowout portions are installed in the ceiling.

  As shown in FIG. 1, the air conditioner 10 includes an indoor unit 12 and an outdoor unit 14, and the indoor unit 12 includes a first heat exchanger 16 that is an evaporator, and a blower fan 18. The outdoor unit 14 includes a compressor 20 and a second heat exchanger 22 that is a condenser. The first heat exchanger 16, the compressor 20, and the second heat exchanger 22 are connected by a refrigerant pipe 24. An expansion valve (not shown) is provided upstream of the first heat exchanger 16 in the refrigerant flow direction in the refrigerant flow path.

  The indoor unit 12 is a cassette type that fits into the ceiling of a building from below, and includes a box body 26 and a decorative board 28 provided on the lower side of the box body 26. As shown in FIG. 3, the decorative plate 28 is provided with a suction port 30 in the center, and blowout ports 32 at a plurality of locations (four locations in the illustrated example) around the suction port 30. Further, a drain pan 34 made of a steel plate or the like is installed above the decorative plate 28. As shown in FIG. 4, the drain pan 34 is provided in a frame shape around the suction port 30. The first heat exchanger 16 (FIG. 1), which is not shown in FIGS. 3 and 4, is erected in a ring shape with the lower surface installed on the drain pan. The drain water generated in the first heat exchanger 16 is collected in the drain pan 34 and can be discharged to the outside through the drain pipe 38 by the drain pump 36. That is, the drain pump 36 is provided on the drain water upstream side of the drain pipe 38. The drain pump 36 is driven by a motor (not shown). The drain pump 36 sucks drain water from the suction side, that is, the upstream side of the drain pipe 38 and drives it to the discharge side, that is, the downstream side, of the drain pipe 38 by driving the motor. The inner diameter of the drain pipe 38 is, for example, 20 mm to 25 mm.

  Returning to FIG. 1 and FIG. 2, the blower fan 18 is provided inside the box body 26 and inside the first heat exchanger 16. The blower fan 18 is a centrifugal fan driven by a motor (not shown), and blows indoor air sucked from the suction port 30 shown in FIGS. 3 and 4 to the surrounding first heat exchanger 16. As a result, the air passing through the first heat exchanger 16 is cooled by the first heat exchanger 16 and then blown out into the room through the outlet 32 (FIG. 3).

  As shown in FIGS. 1 and 2, the motor that drives the blower fan 18 is connected to the control unit 40. The control unit 40 is a microcomputer having a CPU, a memory, and the like. The control unit 40 has air conditioner operation control means for controlling the operation of the blower fan 18. The air conditioner operation control means also controls the operation of the motor that drives each of the compressor 20 and the drain pump 36 (FIG. 3). The control unit 40 can input and output signals to or from a remote controller 42 (FIG. 2) provided indoors by wire or wirelessly.

  As shown in FIG. 2, a first warning lamp 44 and a second warning lamp 46 are provided below the decorative board 28. Further, when the indoor unit 12 is clogged with the drain pump 36 (FIG. 3) or when the drain water level in the drain pan 34 (FIGS. 3 and 4) is equal to or higher than a predetermined level, that is, an abnormal A drain sensor 48 that outputs a signal is provided, and the drain sensor 48 is connected to the control unit 40. When receiving an abnormal signal from the drain sensor 48, the control unit 40 turns on or blinks the first warning lamp 44. The first warning lamp 44 and the second warning lamp 46 are provided at positions that can be seen when a person looks up in the room. Moreover, the 2nd warning lamp 46 comprises the drain piping dirt detection apparatus 50, and respond | corresponds to the alerting | reporting means described in the claim. The drain piping contamination detection device 50 includes a second warning lamp 46, a control unit 52, which will be described later, a transparent piping section 54 (FIGS. 5 and 6), and an optical sensor 56, respectively.

  As shown in FIG. 5, the drain pipe 38 is provided in a portion located outside the box body 26, in a first horizontal drainage portion 58, a second horizontal drainage portion 60, a first horizontal drainage portion 58, and a second horizontal drainage portion 60. And a rising drainage portion 62 connected between the two. That is, the drain pipe 38 includes a rising drainage portion 62 that is substantially upright on the downstream side of the drain pump 36 and a second horizontal drainage portion 60 that is arranged in a substantially horizontal direction continuously from the rising drainage portion 62. The horizontal drains 58 and 60 can be arranged in a state where they are not inclined at all with respect to the horizontal direction, or can be arranged in a state where they are slightly inclined with respect to the horizontal direction. Throughout the specification and claims, the horizontal drainage portion includes a piping portion arranged to be substantially horizontal and slightly inclined with respect to the horizontal direction. And the transparent piping part 54 is provided in the length direction several places (three places in the example of illustration) of the drain piping 38 of the rising drainage part 62 and the two place positions of the 2nd horizontal drainage part 60. . The transparent piping part 54 is made into a tubular shape by a transparent material such as a transparent plastic material or transparent glass. In addition, the transparent piping part 54 should just make the length direction part facing the optical sensor 56 mentioned later made from a transparent material, for example, comprises the connection part with the other part of the drain piping 38 other than a transparent material. You can also The rising drainage part 62 and the second horizontal drainage part 60 provided with such a transparent pipe part 54 are disposed on the back of the ceiling where indoor light and external light hardly reach.

  Further, in the drain pipe 38, optical sensors 56 are provided at a plurality of positions (three places in the illustrated example) corresponding to the transparent pipe portion 54. In addition, the number of the optical sensors 56 and the transparent piping part 54 can also be made into 1 piece, 2 pieces, or 4 pieces or more.

  As shown in FIG. 6, the optical sensor 56 is an infrared sensor, for example, and includes a light emitting unit 64 and a light receiving unit 66. The light emitting part 64 and the light receiving part 66 are attached to the outer peripheral surface of the transparent pipe part 54 so as to face each other in the diameter direction of the transparent pipe part 54. The light irradiated from the light emitting unit 64 is received by the light receiving unit 66. The light emitting unit 64 and the light receiving unit 66 are connected to a control unit 52 that is a second control unit. The control unit 52 is a microcomputer having a CPU, a memory, and the like, and can be installed later separately from the control unit 40. The control unit 52 is provided in the indoor unit 12. The optical sensor 56 detects the light transmittance in the transparent piping unit 54 from the signal output from the control unit 52 to the light emitting unit 64 and the signal input from the light receiving unit 66. A signal representing the detected value of the light transmittance of the optical sensor 56 is output to the control unit 52.

  The control unit 52 has an abnormality determination unit that determines whether there is an abnormality in the light transmittance in the transparent pipe portion 54 based on the detection signal of the optical sensor 56. Further, the control unit 52 determines that there is an abnormality in the light transmittance by the abnormality determining means, that is, the transparent pipe portion 54 is excessively contaminated with opaque drain water or the like. When it is determined that attenuation of light transmittance such as infrared rays passing through the unit 54 is excessive, an abnormality is notified. That is, in this case, the second warning lamp 46 (FIGS. 2 and 6) provided on the lower side of the decorative board 28 is turned on or blinked.

  For example, as shown in FIG. 7, the control unit 52 includes a DC power supply 70, a logical negation element (NOT element) 72, and a switching element 74 such as a transistor. The DC power source 70 is connected to the light emitting unit 64 and the light receiving unit 66 that constitute the optical sensor 56. The light emitting unit 64 is configured by a light emitting element such as an infrared LED. The light receiving unit 66 is configured by a light receiving element such as a phototransistor or a photodiode. When the light emitted from the light emitting unit 64 is received by the light receiving unit 66 without being interrupted by the opaque drain water, it is determined that the clogging in the drain pipe 38 (FIGS. 3 and 5) is not excessive. The output signal from the logic negation element 72 becomes LO, and the second warning lamp 46 is turned off. The second warning lamp 46 is connected to an external AC power source 76. In addition, if the light received from the light-emitting unit 64 is excessively blocked by the opaque drain water in the light-receiving unit 66 and the light received by the light-receiving unit 66 is excessively attenuated, the light in the drain pipe 38 (FIGS. 3 and 5). That is, it is determined that there is an excessive amount, the output signal from the logic negation element 72 becomes High, and the second warning lamp 46 is lit. Thereby, the dirt of the drain pipe 38 can be detected. Note that power can be supplied to the second warning lamp 46 from a DC power supply. The abnormality determination means includes a logic negation element 72 and a switching element 74.

  In addition, as shown in FIG. 2, when the abnormality determining means of the control unit 52 determines that there is an abnormality in the light transmittance in the transparent piping section 54 (FIGS. 5 and 6), an abnormality in the light transmittance. A signal indicating that the air conditioner is present is output to the control unit 40, and the operation of the air conditioner 10 is stopped by the air conditioner operation control means included in the control unit 40, for example, the operation of the blower fan 18 is stopped. You can also. In this case, the operation of the compressor 20 (FIG. 1) and the drain pump 36 (FIG. 3) of the outdoor unit 14 as well as the blower fan 18 can be stopped by the air conditioner operation control means. Further, when the abnormality determining means determines that there is an abnormality in the light transmittance, the air conditioner operation control means stops the operation of only the blower fan 18 or the operation of the blower fan 18 and the compressor 20 is stopped. While stopping, the drain pump 36 (FIG. 3) may be kept operating.

  As shown in FIG. 2, the remote control 42 is provided with a third warning lamp 78 and the abnormality determining means of the control unit 52 has an abnormality in the light transmittance in the transparent piping portion 54 (FIGS. 5 and 6). If it is determined that, the controller 40 can output a signal indicating an abnormality to the remote controller 42 to light or blink the third warning lamp 78. In the present embodiment, the control unit 52 and the second warning lamp 46 may be attached after the other components of the air conditioner 10 are assembled. For example, when the second warning lamp 46 is attached, the second warning lamp 46 can be easily attached by providing a hole for attaching the second warning lamp 46 to the decorative board 28.

  A warning lamp provided in an air conditioner not provided with the drain pipe contamination detection device 50, such as the first warning lamp 44, is also used as the second warning lamp 46 with the function of the second warning lamp 46. The number of warning lamps can be reduced. Further, the control unit 40 can be provided with the function of the control unit 52. In this case, the signal from the optical sensor 56 is directly output to the control unit 40. When it is determined by the signal from the optical sensor 56 that there is an abnormality in the light transmittance in the transparent pipe section 54, the control section 40 turns on or blinks a warning lamp such as the second warning lamp 46 or blows a fan. It is also possible to have a function of stopping the operation of 18.

  According to the present embodiment, since the transparent pipe portion 54, the optical sensor 56, and the abnormality determination means are provided, the light transmittance in the transparent pipe portion 54 provided in the drain pipe 38 by the abnormality determination means is abnormal. When it is determined that there is drain water that is an opaque liquid in the drain pipe 38, it can be determined that the drain pipe 38 is contaminated. That is, since the drain water becomes colored and opaque with high viscosity due to contamination of fungi, water stains, dust, etc. in the air, the opaque drain water is excessively contained in the drain pipe 38 by reducing the light transmittance. If it exists, it can be determined that the drain pipe 38 is dirty. For this reason, as in the present embodiment, by adopting a configuration including the second warning lamp 46 for notifying abnormality when abnormality is determined by the abnormality determining means, the user recognizes that there is abnormality. By stopping the operation of the air conditioner 10, it is possible to effectively prevent water leakage from the air conditioner 10 to the room. Further, by adopting a configuration including an air conditioner operation control means for stopping the operation of the air conditioner 10 when an abnormality is judged by the abnormality judging means, water leakage from the air conditioner 10 to the room is effectively prevented. it can. Moreover, even if the air conditioner 10 is installed behind the ceiling and installed in a place where it is difficult to inspect the components of the air conditioner 10 such as the drain pipe 38 as in the present embodiment, the inspection work is not performed. In addition, dirt inside the drain pipe 38 can be detected, and water leakage into the room due to clogging in the drain pipe 38 can be effectively prevented.

  In addition, the air conditioner operation control unit includes a drain pump 36 and, when an abnormality is determined by the abnormality determination unit, stops the operation of at least the blower fan 18 of the air conditioner 10 while continuing to operate the drain pump 36. When the blower fan 18 is stopped, the drain fan 36 is activated to prevent water leakage from the air conditioner 10 to the room from being promoted by the blower fan 18, and the drain pump 36 is operated to drain water in the drain pan 34. Can be more effectively prevented from leaking water from the air conditioner 10 into the room.

  Further, since the optical sensors 56 are provided at positions corresponding to a plurality of positions in the length direction of the drain pipe 38, even when only a part of the drain pipe 38 is dirty, it is easier to find the dirt. It is possible to more effectively prevent water leakage into the water.

  In addition, a drain pump 36 provided on the drain water upstream side of the drain pipe 38 is provided, and the drain pipe 38 is continuous from the drain pump 36 to the downstream side of the rising drainage part 62 and from the rising drainage part 62 to the downstream side. Second horizontal drainage portion 60 arranged in the horizontal direction, the second horizontal drainage portion 60 is not inclined with respect to the horizontal direction, or when the inclination is slight even if it is inclined, the second In the horizontal drainage unit 60, drain water is likely to be clogged, and water leakage from the air conditioner 10 to the room tends to occur. For this reason, by adopting the configuration of the present embodiment that includes the transparent pipe portion 54, the optical sensor 56, and the abnormality determination means, the present embodiment that water leakage from the air conditioner 10 to the room can be effectively prevented. The effect obtained becomes remarkable.

  The notification unit is not limited to a warning lamp such as the second warning lamp 46 as in the present embodiment, and for example, a warning buzzer can be used as the notification unit. For example, when it is determined by the abnormality determination means that there is an abnormality in the light transmittance in the transparent pipe portion 54, a warning buzzer is sounded instead of or together with the lighting or blinking of the second warning lamp 46. You can also.

  Moreover, this Embodiment demonstrated the case where the air conditioner 10 which detects the stain | pollution | contamination of the drain piping 38 with the drain piping stain | pollution | contamination detection apparatus 50 is a ceiling installation type. However, the present invention is not limited to such a configuration, for example, a configuration for detecting dirt on a drain pipe of a wall-mounted air conditioner such as a wall-mounted type generally used as a home air conditioner. You can also For example, a wall-mounted air conditioner contamination detection device may include a transparent pipe section, a light sensor, an abnormality determination means, a warning lamp as a notification means, and one or both of air conditioner operation control means. it can.

It is a block diagram which shows the air conditioner which detects the stain | pollution | contamination of drain piping with the drain piping stain | pollution | contamination detection apparatus which concerns on embodiment of this invention. In FIG. 1, it is a block diagram which mainly shows the indoor unit part of an air conditioner in detail. It is a schematic perspective view which abbreviate | omits and shows the indoor unit installed in the ceiling back. It is the perspective view which looked at the suction inlet and drain pan of FIG. 3 from diagonally upward. It is a schematic perspective view which shows an indoor unit, drain piping, and an optical sensor. It is a figure which shows the AA cross section of FIG. 5, and the structure of the control unit which inputs the signal from an optical sensor, and a warning lamp. It is a circuit diagram containing an optical sensor and a warning lamp.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Air conditioner, 12 Indoor unit, 14 Outdoor unit, 16 1st heat exchanger, 18 Blower, 20 Compressor, 22 2nd heat exchanger, 24 Refrigerant piping, 26 Box body, 28 Decorative plate, 30 Air inlet, 32 outlet, 34 drain pan, 36 drain pump, 38 drain piping, 40 control unit, 42 remote control, 44 first warning lamp, 46 second warning lamp, 48 drain sensor, 50 drain piping contamination detection device, 52 control unit, 54 Transparent piping section, 56 light sensor, 58 first horizontal drain section, 60 second horizontal drain section, 62 rising drain section, 64 light emitting section, 66 light receiving section, 70 DC power supply, 72 logic negation element, 74 switching element, 76 AC Power, 78 Third warning lamp.

Claims (6)

A transparent pipe made of transparent material provided in the drain pipe of the air conditioner;
An optical sensor for detecting the light transmittance in the transparent piping part;
A drain pipe contamination detection device for an air conditioner, comprising: an abnormality determination unit that determines whether or not there is an abnormality in light transmittance in the transparent pipe section based on a detection signal from the optical sensor. In the drain piping dirt detection device for an air conditioner according to claim 1,
A drain pipe contamination detection device for an air conditioner comprising an informing means for informing an abnormality when an abnormality is judged by the abnormality judging means. In the drain piping dirt detection device for an air conditioner according to claim 1 or 2,
An air conditioner drain pipe contamination detection device comprising air conditioner operation control means for stopping the operation of an air conditioner when an abnormality is judged by an abnormality judgment means. In the drain piping dirt detection device for an air conditioner according to claim 3,
A drain pump that sucks drain water from the suction side of the drain pipe and sends it to the discharge side of the drain pipe,
The air conditioner operation control means is configured to stop the operation of at least the air conditioner fan and continue to operate the drain pump when the abnormality is determined by the abnormality determination means. . In the drain piping dirt detection device for an air conditioner according to any one of claims 1 to 4,
A drain piping contamination detection device for an air conditioner, wherein a transparent piping portion and an optical sensor are provided at positions corresponding to a plurality of locations in the length direction of the drain piping. In the drain piping dirt detection device for an air conditioner according to any one of claims 1 to 5,
It has a drain pump provided on the drain water upstream side of the drain pipe,
The drain pipe has a rising drainage portion downstream of the drain pump and a horizontal drainage portion arranged in a horizontal direction continuously from the rising drainage portion to the downstream side. .

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