JP5635967B2 - Air conditioner - Google Patents

Description

  The present invention relates to an air conditioner, and more particularly to a technique for draining drain water.

  An air conditioner circulates air through a heat exchanger that has been heated or cooled to heat or cool the air by a heat radiating or heat absorbing action of the heat exchanger, and blows the heated or cooled air into the room or the like. Adjust the temperature inside the room. When this air conditioner is operated, water droplets condensed during the heat exchange of the air by the heat exchanger drop from the heat exchanger. In general, an air conditioner includes a drain pan that stores drain water dripped from a heat exchanger. The drain water collected in the drain pan is sucked by the pump and drained outside the air conditioner.

  Further, when foreign matter such as dust or dust adheres to the heat exchanger, the attached foreign matter falls and collects in the drain pan together with drain water. In this case, since the pump sucks the foreign matter accumulated in the drain pan together with the drain water, the foreign matter may block the suction port and the discharge port of the pump, resulting in poor drainage and water leakage.

  Conventionally, as a means for preventing poor drain water drainage, generally, regular cleaning has been performed. This cleaning has been performed manually by removing the drain pan, pump, etc., disassembling the air conditioner to the extent possible, and using a dust cloth or the like.

  On the other hand, in the following Patent Document 1, a partition plate is provided on the drain pan to allow foreign matter to settle on the partition plate, and the foreign matter is forcibly removed from the partition plate using a suction pump, and another drainage pump is used. An air conditioner that drains drain water is disclosed. Further, the following cited document 2 discloses a drain pan in which a plurality of comb-shaped projections surrounding the suction port of the pump are formed on the bottom surface.

JP 2007-40636 A JP-A-60-99940

  As described above, the cleaning of the conventional drain pan requires an air conditioner disassembly operation. For example, since a ceiling cassette type air conditioner is installed behind the ceiling of a building such as an office building or factory, the disassembly work of the air conditioner is performed behind the narrow ceiling, or the air conditioner is carried out of the ceiling. There must be. Such work is not easy, requires a lot of time and labor, and it is necessary to stop the air conditioner for a long time.

  On the other hand, according to the air conditioner disclosed in the cited document 1, it is possible to precipitate foreign matter on the partition plate by using the partition plate, and remove the foreign matter from the partition plate using a suction pump. However, if foreign matter does not settle on the partition plate, foreign matter may settle on the bottom surface of the drain pan. It is necessary to manually remove the foreign matter remaining on the surface. Further, when the foreign matter is sucked by the drainage pump before it settles on the partition plate, the suction port and the drainage port of the drainage pump may be blocked by the foreign matter. Further, in order to remove foreign matter that could not be removed by the suction pump from the partition plate, it is necessary to disassemble the air conditioner and manually remove the foreign matter remaining on the partition plate. Thus, even if it is an air conditioner with the partition plate provided in the drain pan, disassembly work of the air conditioner may be required to clean the drain pan, which requires a great deal of time and labor.

  Moreover, according to the drain pan currently disclosed by the cited reference 2, since the inflow of the foreign material to the suction port of a pump can be blocked | prevented by the comb-shaped protrusion surrounding the suction port of a pump, the drain water which does not contain a foreign material is pumped. Can be aspirated by. However, the foreign matter blocked by the comb-like projections remains on the drain pan, and it is necessary to disassemble the air conditioner in order to remove the foreign matter remaining on the drain pan. Therefore, even with the drain pan disclosed in the cited document 2, the operation of disassembling the air conditioner is required for cleaning the drain pan, which requires a great deal of time and labor.

  An object of the present invention is to provide an air conditioner that suppresses poor drain water drainage due to foreign matter and that facilitates maintenance of a drain pan.

  The invention which concerns on Claim 1 is provided in the downward side of the heat exchanger, the drain pan which receives the drain water dripped from the said heat exchanger, and the water storage part which stores the drain water which the said drain pan received And a pump for sucking drain water from the water reservoir, a first drainage channel for leading drain water from the drain pan to the reservoir, and provided above the first drainage channel, and from the drain pan An air conditioner comprising: a second drainage channel that guides drain water to a water storage unit; and a filter that is provided in the first drainage channel and removes foreign matters contained in the drain water. .

  The invention according to claim 2 is the air conditioner according to claim 1, wherein the first drainage channel is provided to extend downward from the bottom surface of the drain pan toward the water storage section, An upper end portion of one drainage channel communicates with the bottom surface of the drain pan, a lower end portion of the first drainage channel opens, and communicates with the water storage portion at a side portion between the upper end portion and the lower end portion. And a cap that is detachably fitted to the lower end portion of the first drainage channel and closes the lower end portion of the first drainage channel.

  The invention according to claim 3 is the air conditioner according to claim 2, characterized in that the filter and the cap are integrated.

The invention according to claim 4 is the air conditioner according to any one of claims 1 to 3, wherein the air conditioner is provided in the second drainage channel and removes foreign matter contained in the drain water. It further has a filter .

  The invention according to claim 5 is the air conditioner according to any one of claims 1 to 4, wherein the filter is a mesh-like member.

  The invention according to claim 6 is the air conditioner according to any one of claims 1 to 5, wherein the drain pan is disposed to be inclined in one direction, and the first drainage channel and the first drain channel are arranged. The drainage channel 2 is provided on the downstream side of the slope of the drain pan, provided on the upstream side of the slope of the drain pan, the first sensor that detects drain water and outputs a detection signal; Control means for controlling air conditioning based on the detection signal output from the first sensor.

  The invention according to claim 7 is the air conditioner according to claim 6, wherein the control means stops air conditioning when the detection signal is output from the first sensor.

  The invention according to claim 8 is the air conditioner according to claim 6 or claim 7, wherein the second sensor is provided in the second drainage channel and detects a drain water and outputs a detection signal. In addition, the control unit further controls to generate an alarm when a detection signal is output from at least one of the first sensor and the second sensor.

  The invention according to claim 9 is the air conditioner according to any one of claims 1 to 5, provided in the second drainage channel, detecting drain water and outputting a detection signal. The apparatus further includes a second sensor and a control unit that controls to generate an alarm when the detection signal is output from the second sensor.

  The invention according to claim 10 is the air conditioner according to claim 2 or claim 3, wherein the bottom surface of the water reservoir is disposed at the same height as the lower end of the first drainage channel. It is characterized by.

  The invention according to claim 11 is the air conditioner according to claim 2 or claim 3, wherein a bottom surface of the water storage portion is inclined toward the lower end portion of the first drainage channel, and the first It is arrange | positioned in the position of the same height as the said lower end part in the boundary with the said lower end part of this drainage channel.

  The invention according to claim 12 is the air conditioner according to claim 2 or claim 3, wherein the bottom surface of the water reservoir is disposed below the lower end of the first drainage channel. It is characterized by that.

  According to the present invention, since foreign matter contained in the drain water can be removed by the filter, drainage failure of the drain water due to the foreign matter can be suppressed. In addition, when the filter is clogged with foreign matter, the drain water can be drained by guiding the drain water to the water storage section by the second drainage channel. Moreover, since a foreign material can be removed from a drain pan by removing a filter from a 1st drainage channel, the maintenance of a drain pan becomes easy.

It is a schematic explanatory drawing of the air conditioner which concerns on embodiment of this invention. It is a schematic explanatory drawing of the air conditioner which concerns on the modification 1. It is a schematic explanatory drawing of the air conditioner concerning the modification 2. It is a schematic explanatory drawing of the air conditioner which concerns on the modification 3.

  FIG. 1 shows a schematic configuration of an air conditioner according to an embodiment of the present invention. The air conditioner 1 according to the present embodiment is installed behind the ceiling of a building such as an office building or a factory. For example, the air conditioner 1 is installed on the back surface of a decorative panel (not shown) on the ceiling of a building.

  The air conditioner 1 includes a heat exchanger 2 and heats or cools the air. A drain pan 3 that receives drain water dripped from the heat exchanger 2 is disposed below the heat exchanger 2. The drain water contains foreign matters such as dust and dust. As an example, the drain pan 3 is provided with an inclination so that its height decreases in one direction, and a water storage section 9 for storing drain water is provided on the downstream side of the inclination. That is, the bottom surface 31 of the drain pan 3 is inclined downward toward the water storage unit 9 and guides the drain water to the water storage unit 9 by the action of gravity. Note that the drain pan 3 may not be inclined.

  The water storage unit 9 stores the drain water received by the drain pan 3. A pump 10 that sucks drain water is disposed in the water reservoir 9. The drain water sucked by the pump 10 is drained to the outside of the air conditioner 1 through the drain pipe 11 communicating with the pump 10. In addition, the water storage unit 9 may be provided with a pump sensor 12 that detects drain water. The pump sensor 12 is used to determine the start timing of the pump 10. When the pump sensor 12 detects drain water in the water storage unit 9, the pump sensor 12 outputs a detection signal indicating the detection to the control unit 16.

  The drain pan 3 and the water storage section 9 are divided by the block 4, and the first drainage channel 5 and the second drainage channel 6 are formed between the drain pan 3 and the water storage unit 9 by the block 4. Yes. The first drainage channel 5 and the second drainage channel 6 are provided on the downstream side of the slope of the drain pan 3, and guide the drain water received by the drain pan 3 to the water storage unit 9.

  The first drainage channel 5 has an upper end portion 51 and a lower end portion 52, the upper end portion 51 communicates with the bottom surface 31 on the downstream side of the drain pan 3, and the lower end portion 52 is opened and opened to the outside of the drain pan 3. Yes. The first drainage channel 5 is provided so as to extend from the bottom surface 31 on the downstream side of the drain pan 3 toward the water storage unit 9, and at the side part 53 between the upper end part 51 and the lower end part 52, Communicate. In the air conditioner 1 shown in FIG. 1, the first drainage channel 5 is inclined so that its height decreases from the bottom surface 31 of the drain pan 3 toward the water storage unit 9, and on the downstream side of the inclination. A water reservoir 9 is provided. That is, the 1st drainage channel 5 inclines below toward the water storage part 9 from the bottom face 31 of the drain pan 3, and guides the drain water which the drain pan 3 received to the water storage part 9 by the effect | action of gravity.

  In the 1st drainage channel 5, the filter 7 which removes the foreign material contained in drain water is provided. The filter 7 is a mesh member or a porous member made of metal or resin. By disposing the filter 7 in the first drainage channel 5, foreign matter contained in the drain water flowing through the first drainage channel 5 can be removed by the filter 7. For example, the mesh member may have a hole having a size suitable for removing foreign matters such as dust and dust, and is preferably smaller than the suction port of the pump 10 installed in the water storage unit 9. By making the holes of the mesh-shaped member smaller than the suction port of the pump 10, foreign substances having such a size as to block the suction port of the pump 10 can be removed by the filter 7. For example, when the diameter of the suction port of the pump 10 is 10 to 15 mm, the size of the hole in the mesh member may be 10 mm or less, and further, by making the hole in the mesh member 2 mm or less, it is smaller. Foreign matter can be removed from the drain water, and the suction port of the pump 10 can be prevented from being blocked by the foreign matter.

  Further, a rubber cap 8 for closing the opening of the lower end 52 is fitted into the lower end 52 of the first drainage channel 5. The cap 8 is detachably fitted into the lower end 52 of the first drainage channel 5, and the filter 7 can be removed from the first drainage channel 5 by removing the cap 8 from the lower end 52. A filter 7 can be installed in the drainage channel 5. The filter 7 and the cap 8 may be integrated.

  The second drainage channel 6 is separated from the first drainage channel 5 by the block 4, and is disposed above the first drainage channel 5. That is, the first drainage channel 5 is disposed below the second drainage channel 6, and the upper end 51 located at the boundary between the first drainage channel 5 and the drain pan 3 is also the second drainage channel. It is arranged below 6. Therefore, the drain water received by the drain pan 3 flows preferentially into the first drainage channel 5 rather than the second drainage channel 6 due to the action of gravity. In this way, the drain water received by the drain pan 3 flows preferentially into the first drainage channel 5, and the foreign matter contained in the drain water is removed by the filter 7 disposed in the first drainage channel 5. . However, if foreign matter continues to be removed by the filter 7, the first drainage channel 5 becomes clogged with foreign matter, and the drain water hardly flows through the first drainage channel 5. That is, if foreign matter is removed by the filter 7 to the extent that the first drainage channel 5 is clogged, it becomes difficult for drain water to flow through the first drainage channel 5. In this case, the drain water that could not be drained by the first drainage channel 5 overflows from the first drainage channel 5 and flows into the second drainage channel 6 disposed above the first drainage channel 5. Then, it flows into the water storage section 9 through the second drainage channel 6. In this way, the second drainage channel 6 functions as an emergency drainage channel when the first drainage channel 5 is clogged and it becomes difficult for drain water to flow.

  A filter 15 may be provided in the second drainage channel 6. In the air conditioner 1 shown in FIG. 1, a filter 15 is disposed above the water storage unit 9. The filter 15 is a mesh-like member or a porous member made of metal or resin, like the filter 7. By disposing the filter 15 in the second drainage channel 6, foreign substances contained in the drain water flowing through the second drainage channel 6 can be removed. Therefore, even if the first drainage channel 5 is clogged and the drain water flows into the second drainage channel 6, the foreign matter contained in the drain water can be removed by the filter 15.

  A first abnormality detection sensor 13 is provided on the upstream side of the inclination of the drain pan 3. In addition, a second abnormality detection sensor 14 is provided in the second drainage channel 6. The first abnormality detection sensor 13 and the second abnormality detection sensor 14 detect drain water and output a detection signal indicating the detection to the control unit 16. The first abnormality detection sensor 13 is arranged above the second abnormality detection sensor 14 based on the height position (position indicated by a broken line) where the second abnormality detection sensor 14 is arranged. Yes. That is, the first abnormality detection sensor 13 detects drain water in a high water level state, and the second abnormality detection sensor 14 detects drain water in a low water level state.

  When clogging occurs in the first drainage channel 5 and drain water flows into the second drainage channel 6, the second abnormality detection sensor 14 detects the drain water. Further, since the first abnormality detection sensor 13 is installed above the second abnormality detection sensor 14 and upstream of the slope of the drain pan 3, the drain water flows into the second drainage channel 6. Furthermore, the drain water is detected when the drain water reaches the upstream side of the drain pan 3. As described above, when the first drainage channel 5 is clogged and the drain water flows into the second drainage channel 6, the second abnormality detection sensor 14 detects the drain water and further increases the amount of the drain water. Then, when reaching the upstream side of the drain pan 3, the first abnormality detection sensor 13 detects the drain water.

  Note that the first abnormality detection sensor 13 and the second abnormality detection sensor 14 may be float switches. For example, when the float switch is used for the second abnormality detection sensor 14 and the water level of the drain water flowing through the second drainage channel 6 is detected, the first abnormality detection sensor 13 may not be provided.

  When receiving a detection signal from the pump sensor 12, the control unit 16 drives the pump 10. Accordingly, the pump 10 sucks the drain water from the water storage unit 9 and drains the drain water to the outside of the air conditioner 1 through the drain pipe 11.

  Further, when receiving a detection signal from the second abnormality detection sensor 14, the control unit 16 controls the output unit 17 to output an alarm generation instruction to the output unit 17 to generate an alarm. In addition, when receiving a detection signal from the second abnormality detection sensor 14, the control unit 16 may control the output unit 17 to output information for prompting replacement or cleaning of the filter 7. The fact that the second abnormality detection sensor 14 has detected drain water means that the filter 7 is clogged and the drain water is flowing into the second drainage channel 6. That is, the detection of drain water by the second abnormality detection sensor 14 means that the filter 7 is dirty and clogged with foreign matter. Therefore, the control unit 16 controls the output unit 17 to generate an alarm in order to notify the user, the administrator, and the like that the filter 7 is clogged with foreign matter. In order to prompt the user or administrator to replace or clean the filter 7 clogged with foreign matter, the control unit 16 outputs an output unit 17 to output information for prompting replacement or cleaning of the filter 7. Control.

  The control unit 16 stops the operation of the air conditioner 1 when receiving a detection signal from the first abnormality detection sensor 13. Thereby, the air conditioning by the air conditioner 1 stops. The fact that the first abnormality detection sensor 13 has detected the drain water means that the drain water has flowed into the second drainage channel 6 and further reaches the upstream side of the drain pan 3. In other words, the detection of the drain water by the first abnormality detection sensor 13 is that the drain water level in the drain pan 3 rises too much and the drain water can be sufficiently drained into the water storage section 9 also by the second drainage channel 6. It means you can't. As described above, since the drain water cannot be sufficiently drained from the drain pan 3 to the water storage section 9 even by the first drain channel 5 and the second drain channel 6, there is a possibility that the drain water leaks from the drain pan 3 to the outside. is there. In order to prevent the drain water from leaking, when the first abnormality detection sensor 13 detects the drain water, the control unit 16 stops the operation of the air conditioner 1.

  In addition, when receiving a detection signal from the first abnormality detection sensor 13, the control unit 16 stops the operation of the air conditioner 1 and outputs an alarm generation instruction to the output unit 17 to generate an alarm. The output unit 17 may be controlled. Further, when receiving a detection signal from the first abnormality detection sensor 13, the control unit 16 may control the output unit 17 so as to output information for prompting replacement or cleaning of the filter 7.

  The output unit 17 outputs an alarm signal. For example, the output unit 17 is a sound generation device such as a speaker, and generates an alarm sound according to an alarm generation instruction from the control unit 16. The output unit 17 may be a display device such as a CRT or a liquid crystal display, and may display an alarm message in accordance with an alarm generation instruction from the control unit 16. Further, the output unit 17 may be a communication means such as a network interface, and an alarm signal indicating an alarm generation instruction is transmitted via a communication path such as a network such as a LAN (Local Area Network) or a WAN (Wide Area Network). It may be transmitted to a management center such as a monitoring center. When the management center receives an alarm signal from the air conditioner 1 via a communication path such as a network, the management center generates an alarm sound on the sound generation device, displays an alarm message on the display device, An alarm may be notified to a pre-registered portable terminal device carried by a worker who performs maintenance or the like. Further, the output unit 17 displays a message for prompting replacement or cleaning of the filter 7 under the control of the control unit 16, outputs the voice of the message, or transmits the message to the management center. You may do it.

  Next, the operation and effect of the air conditioner 1 having the above configuration will be described. First, when the air conditioner 1 is operated, drain water condensed at the time of heat exchange by the heat exchanger 2 is dripped from the heat exchanger 2 to the drain pan 3. The drain water contains foreign matters such as dust and dust. The drain water dripped into the drain pan 3 flows into the first drainage channel 5 installed downstream of the drain pan 3 and extending below the drain pan 3, and enters the water storage unit 9 through the first drainage channel 5. Flows in. That is, the drain water flows into the first drainage channel 5 from the upper end portion 51 communicating with the bottom surface 31 on the downstream side of the drain pan 3 along the direction of the arrow A shown in FIG. From the side part 53 between the upper end part 51 and the lower end part 52 into the water storage part 9. Since the filter 7 is installed in the first drainage channel 5, foreign matter contained in the drain water is removed by the filter 7 while the drain water flows in the first drainage channel 5. . The drain water that has flowed into the water reservoir 9 is sucked by the pump 10 and drained to the outside of the air conditioner 1 through the drain pipe 11. Since the foreign matter has been removed from the drain water flowing into the water storage unit 9 by the filter 7, it is possible to prevent the suction port and the discharge port of the pump 10 from being blocked by the foreign matter.

  When the foreign matter is continuously removed by the filter 7 and the first drainage channel 5 becomes clogged with foreign matter, the drain water flows into the second drainage channel 6 along the direction of arrow B shown in FIG. Then, it flows into the water storage section 9 through the second drainage channel 6. As described above, even when the first drainage channel 5 is clogged with foreign substances, the drain water can be guided from the drain pan 3 to the water storage unit 9 through the second drainage channel 6.

  When drain water flows into the second drainage channel 6, the second abnormality detection sensor 14 detects the drain water and outputs a detection signal indicating the detection to the control unit 16. When receiving a detection signal from the second abnormality detection sensor 14, the control unit 16 outputs an alarm generation instruction to the output unit 17. The output unit 17 outputs an alarm signal by at least one of a sound generator, a display device, and a communication unit in accordance with the alarm generation instruction. The output unit 17 may output a message for prompting replacement or cleaning of the filter 7 under the control of the control unit 16. In this way, by notifying the user, the administrator, and the like that the drain water has flowed into the second drainage channel 6, the user, the administrator, etc., recognize that the filter 7 is clogged. Can do.

  When the drain water flows into the second drainage channel 6 and further reaches the upstream side of the drain pan 3, the first abnormality detection sensor 13 detects the drain water and sends a detection signal indicating the detection to the control unit 16. Output. When receiving a detection signal from the first abnormality detection sensor 13, the control unit 16 stops the operation of the air conditioner 1. When the first abnormality detection sensor 13 detects drain water, the drain water level in the drain pan 3 rises too much, and the drain water can be sufficiently drained into the water storage section 9 also by the second drainage channel 6. Therefore, the control unit 16 stops the operation of the air conditioner 1. Thereby, it is prevented that drain water leaks out from the drain pan 3.

  In addition, when removing the filter 7, the operator is installed in the first drainage channel 5 by removing the cap 8 fitted in the lower end 52 (opening) of the first drainage channel 5. The filter 7 can be removed from the lower end 52. By removing the filter 7 clogged with foreign substances from the first drainage channel 5 and inserting a new filter 7 into the first drainage channel 5 from the lower end 52, the new filter 7 is inserted into the first drainage channel 5. Can be easily installed inside. In this way, the filter 7 can be easily replaced simply by removing the cap 8, so that the drain pan 3 can be easily maintained. Alternatively, the filter 7 clogged with foreign matter may be washed, and the washed filter 7 may be installed in the first drainage channel 5. Thus, even when the filter 7 is washed, it is not necessary to clean the entire drain pan 3, and foreign matter can be removed by washing the filter 7, so that the maintenance of the drain pan 3 is facilitated. . Further, when the filter 7 and the cap 8 are integrated, the filter 7 and the cap 8 can be detached and attached together, so that maintenance becomes easier.

  As described above, according to the air conditioner 1 according to the present embodiment, the filter 7 is provided in the first drainage channel 5 to remove foreign matters contained in the drain water, so that foreign matters on the drain pan 3 can be removed. Remaining can be prevented, and foreign matter can be prevented from flowing into the water reservoir 9. As a result, the suction port and the discharge port of the pump 10 are not blocked by foreign matter, so that drainage of drain water due to foreign matter can be suppressed. The filter 7 is installed in the first drainage channel 5 with the lower end 52 opened, and the lower end 52 is closed by the cap 8 by fitting the cap 8. The filter 7 can be easily removed from the first drainage channel 5 by simply removing it from the lower end portion 52, and the filter 7 can be easily installed in the first drainage channel 5. Thus, according to the air conditioner 1 which concerns on this embodiment, the drainage failure of drain water can be suppressed with the filter 7. Moreover, since the foreign material contained in drain water is removed by the filter 7 with easy removal, the foreign material can be removed from the drain pan 3 and the drain pan 3 can be cleaned only by removing the filter 7. Thus, the maintenance of the drain pan 3 becomes easy. In addition, since the filter 7 can be easily removed, the possibility of defective drainage can be further reduced by periodically replacing the filter 7.

  In addition, when the lower end part 52 of the 1st drainage channel 5 is arrange | positioned in the position same as the bottom face of the water storage part 9, or lower than the bottom face of the water storage part 9, when the cap 8 is removed, the water storage part 9 The drain water remaining inside can be drained to the outside from the lower end 52 of the first drainage channel 5.

  Next, an air conditioner according to Modification 1 to Modification 3 will be described with reference to FIGS. In the air conditioners 1A, 1B, and 1C according to the first to third modifications shown in FIGS. 2 to 4, the first drainage channel 5 is vertically downward from the bottom surface 31 on the downstream side of the drain pan 3. It extends towards. The filter 7 is installed in the 1st drainage channel 5 similarly to the air conditioner 1 which concerns on embodiment mentioned above. The point which the 1st drainage channel 5 is extended in the perpendicular direction is a point different from the air conditioner 1 which concerns on embodiment mentioned above. Even when the first drainage channel 5 is arranged in the vertical direction from the bottom surface 31 on the downstream side of the drain pan 3 in this way, the drain water flows from the drain pan 3 through the first drain channel 5 by the action of gravity. It flows into the water reservoir 9. And since the foreign material contained in drain water is removed by the filter 7 arrange | positioned in the 1st drainage channel 5 while drain water flows through the 1st drainage channel 5, drain water by a foreign material is removed. Drainage failure can be suppressed. Moreover, the filter 7 can be easily taken out from the first drainage channel 5 simply by removing the cap 8 from the lower end portion 52 of the first drainage channel 5, and the filter is placed in the first drainage channel 5. 7 can be easily attached. In addition, by inclining the 1st drainage channel 5 like the air conditioner 1 shown in FIG. 1, compared with the case where the 1st drainage channel 5 was extended in the perpendicular direction, the water storage part 9 from the drain pan 3 is shown. The distance of the 1st drainage channel 5 extended by this can be lengthened more. As a result, the distance through which the drain water passes through the filter 7 disposed in the inclined first drainage channel 5 becomes longer, so that the drain water comes into contact with the filter 7 in a wider range, and more foreign matter is present. Can be removed by the filter 7.

  Further, in the air conditioner 1 </ b> A according to Modification 1 shown in FIG. 2, the lower end portion 52 of the first drainage channel 5 is disposed at the same height as the bottom surface of the water storage unit 9. Therefore, by removing the cap 8 from the lower end 52 of the first drainage channel 5, the drain water remaining in the water storage unit 9 can be drained from the lower end 52 of the first drainage channel 5 to the outside. it can.

  Moreover, like the air conditioner 1B according to the modification 2 shown in FIG. 3, the bottom surface of the water storage portion 9 is inclined toward the lower end portion 52 of the first drainage channel 5 and at the boundary with the lower end portion 52. You may arrange | position in the position of the same height as the lower end part 52. FIG. This makes it easier for drain water remaining in the water storage part 9 to flow to the lower end part 52 of the first drainage channel 5, so that when the cap 8 is removed from the lower end part 52 of the first drainage channel 5, The drain water remaining in the water reservoir 9 can be drained well from the lower end 52 to the outside. In the air conditioner 1 according to the embodiment described above, the bottom surface of the water storage unit 9 may be inclined toward the lower end 52 of the first drainage channel 5.

  Moreover, the bottom surface of the water storage unit 9 may be disposed at a position lower than the lower end portion 52 of the first drainage channel 5 as in an air conditioner 1C according to the third modification illustrated in FIG. Since the lower end portion 52 of the first drainage channel 5 is disposed at a position higher than the bottom surface of the water storage unit 9, the drain water that has flowed into the water storage unit 9 is less likely to flow back to the first drainage channel 5. Therefore, when the cap 8 is removed from the lower end portion 52, it is possible to prevent drain water remaining in the water storage portion 9 from flowing into the first drainage channel 5 and from the lower end portion 52 to the outside. Even if the cap 8 is removed, the drain water in the water reservoir 9 does not flow to the outside, so that the filter 7 can be easily attached and removed, and the drain pan 3 can be easily maintained. In the air conditioner 1 according to the above-described embodiment, the bottom surface of the water storage unit 9 may be disposed at a position lower than the lower end portion 52 of the first drainage channel 5.

  1, 1A, 1B, 1C Air conditioner, 2 Heat exchanger, 3 Drain pan, 4 Block, 5 First drainage channel, 6 Second drainage channel, 7,15 Filter, 8 Cap, 9 Water reservoir, 10 Pump, 11 Drain pipe, 12 Pump sensor, 13 1st abnormality detection sensor, 14 2nd abnormality detection sensor, 16 Control part, 17 Output part, 31 Bottom face, 51 Upper end part, 52 Lower end part, 53 Side part.

Claims (12)

A heat exchanger,
A drain pan provided on the lower side of the heat exchanger and receiving drain water dripped from the heat exchanger;
A water storage section for storing drain water received by the drain pan;
A pump for sucking drain water from the water reservoir;
A first drainage channel for leading drain water from the drain pan to the water reservoir;
A second drainage channel that is provided above the first drainage channel and guides drain water from the drain pan to the water storage unit;
A filter provided in the first drainage channel to remove foreign substances contained in the drain water;
The air conditioner characterized by having. The air conditioner according to claim 1,
The first drainage channel is provided to extend downward from the bottom surface of the drain pan toward the water storage unit, and an upper end portion of the first drainage channel communicates with a bottom surface of the drain pan, The lower end of the drainage channel is open, and communicates with the water reservoir at the side between the upper end and the lower end;
An air conditioner further comprising a cap that is detachably fitted to the lower end portion of the first drainage channel and closes the lower end portion of the first drainage channel. The air conditioner according to claim 2,
The air conditioner characterized in that the filter and the cap are integrated. It is an air conditioner as described in any one of Claims 1-3,
An air conditioner further comprising another filter that is provided in the second drainage channel and removes foreign matters contained in the drain water . It is an air conditioner as described in any one of Claims 1-4,
The filter is a mesh-like member. It is an air conditioner as described in any one of Claims 1-5,
The drain pan is disposed to be inclined in one direction, and the first drainage channel and the second drainage channel are provided on the downstream side of the tilt of the drain pan,
A first sensor that is provided upstream of the slope of the drain pan and that detects drain water and outputs a detection signal;
Control means for controlling air conditioning based on the detection signal output from the first sensor;
An air conditioner further comprising: It is an air conditioner of Claim 6, Comprising:
The air conditioner is characterized in that the control means stops air conditioning when the detection signal is output from the first sensor. The air conditioner according to claim 6 or 7,
A second sensor provided in the second drainage channel for detecting drain water and outputting a detection signal;
The air conditioner further characterized in that the control means further controls to generate an alarm when a detection signal is output from at least one of the first sensor and the second sensor. It is an air conditioner as described in any one of Claims 1-5,
A second sensor provided in the second drainage channel for detecting drain water and outputting a detection signal;
Control means for controlling to generate an alarm when the detection signal is output from the second sensor;
An air conditioner further comprising: An air conditioner according to claim 2 or claim 3, wherein
The air conditioner characterized in that the bottom surface of the water reservoir is disposed at the same height as the lower end of the first drainage channel. An air conditioner according to claim 2 or claim 3, wherein
The bottom surface of the water storage portion is inclined toward the lower end portion of the first drainage channel, and is disposed at the same height as the lower end portion at the boundary with the lower end portion of the first drainage channel. An air conditioner characterized by An air conditioner according to claim 2 or claim 3, wherein
The air conditioner characterized in that a bottom surface of the water storage part is disposed below the lower end part of the first drainage channel.

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