JP3161616U - Drain tube - Google Patents

Abstract

[PROBLEMS] To ensure that dew condensation water received by a drain pan provided in a lower part of a heat exchanger of an indoor unit used as an air conditioner in a building or the like flows into a drain pipe and prevents dust and foreign matter from entering the drain pipe. A drainage canister is provided. A receiving tube 35 connected to a tip end of a drainage hose 28 that guides drainage of a drain pan 20 is composed of a large diameter portion 41 and a small diameter portion 42, and a ridge is formed on the large diameter portion 41 in the vertical direction. In addition, a slight frictional force is generated between the lower end portion of the distal end of the drainage hose 28 inserted through the upper opening by these protrusions, and the inclined step generated between the large diameter portion 41 and the small diameter portion 42. The depth of insertion of the drainage hose 28 is regulated by the portion, and the drainage hose 28 is connected to the drainage pipe 36 by a male screw formed on the outer peripheral surface on the lower end side of the small diameter portion 42. [Selection] Figure 3

Description

  The present invention relates to a drainage receiving cylinder, and more particularly to a drainage receiving cylinder that receives a lower end of a drainage hose connected to a drain pan of an air conditioner installed indoors.

  A fan coil unit is widely used as an apparatus for air conditioning in a building. The fan coil unit includes a heat exchanger with cold / hot water piping, and cools or warms the indoor air by circulatingly contacting the indoor air with a fan driven by a motor against the fins of the heat exchanger. Is possible. In addition, when a heat exchanger is comprised from the fan coil of cold / hot water, 5-10 degreeC cold water is allowed to pass through in piping at the time of cooling. On the other hand, in the case of heating, 30-35 degreeC warm water is circulated.

  In such a fan coil unit for indoor use, if the indoor air warmed through the heat exchanger is cooled for cooling, dew condensation occurs on the surface of the fin. Therefore, for example, a drain pan as described in Japanese Patent Application Laid-Open No. 2003-1562245, Japanese Patent Application Laid-Open No. 2008-128520, and Japanese Patent Application Laid-Open No. 2009-19794 is installed in the lower part of the heat exchanger, and moisture condensed by the fins is dropped. Are collected and discharged through a drain pipe. Here, a drain pipe is provided at a predetermined position of the floor, and water received by the drain pan is caused to flow through the drain pipe by a drain hose.

  The drainage hose is connected to the drainage pipe by connecting the socket to the upper end of the drainage pipe and passing through the floor with a taper screw, and screwing the nipple into the opening at the upper end of the socket. . Then, the top end of the drain hose is fitted from above into the upper end of the nipple that protrudes upward from the floor, and the bottom end of the drain hose is connected to the outer periphery of the nipple by a hose band from the outer periphery. It was supposed to be fixed on the surface.

  In such a connection structure, every time the drainage hose is connected, the lower end of the drainage hose must be fixed to the nipple with the hose band, and the fixing work with the hose band is required. There is a drawback that the work of becomes complicated. Also, since the drain hose is connected so as to cover the outer periphery of the nipple, the water flowing from above flows out to the outside of the drain pipe through the gap between the drain hose and the nipple, and such water is There was a problem of water leakage on the lower floor. In particular, when the drain hose including the drain pan is cleaned and maintained, if the drain hose is not sufficiently fixed by the hose band, there is a problem that the possibility of the above-described water leakage is further increased.

  In addition, using a structure similar to the drainage hose connection structure of the washing machine, a funnel-shaped receptacle for inserting the lower end of the drainage hose into the drainage pipe installed on the floor is provided. It is also contemplated to simply insert the tip of the drainage hose into this receptacle.

  However, according to such a configuration, the connection between the tip of the drainage hose and the drain pipe is not reliable, which may cause the tip of the drainage hose to come off. In addition, the size of the receiver is sufficiently large relative to the tip of the drainage hose, so that dust and foreign matter can easily enter through the surrounding gaps, thereby causing problems such as clogging the drainage pipe. It was.

  In addition, although the structure which connects the front end side lower end part of a drainage hose and a drain pipe with fixing means, such as a screw, can also be considered, such a structure has the fault which requires an assembly man-hour.

JP 2003-156224 A JP 2008-128520 A JP 2009-19794 A

  An object of the present invention is to provide a drainage receiving cylinder in which drainage received by a drain pan of an air conditioner is surely flowed to a drain pipe.

  Another problem of the present invention is to provide a drainage receptacle that reliably prevents the water received by the drain pan from being correctly introduced into the water distribution pipe, thereby causing a water leakage accident.

  Still another problem of the present invention is that there is no gap between the lower end on the front end of the drain hose and the drain receiving cylinder, so that dust and foreign matter do not enter the drain pipe through the drain receiving cylinder. It is providing the drain receptacle which was made to do.

  Yet another object of the present invention is to provide a drainage receptacle that can be easily connected to a drainage hose to improve workability.

  The above-described problems and other problems of the present invention will be clarified by the technical idea of the present invention described below and the embodiments thereof.

The main idea of the present application is a receiving cylinder that receives the lower end on the front end side of a drainage hose connected to a drain pan of an air conditioner installed indoors.
A protrusion that is prevented from coming off by a slight frictional force is formed between the inner peripheral surface and the drainage hose, and a large-diameter portion into which the drainage hose is inserted from the upper opening,
A small-diameter portion provided on the lower end side of the large-diameter portion, and formed with a male screw connected to the drain pipe on the lower-end-side outer peripheral surface;
A step portion having an inclined inner peripheral surface is formed between the large-diameter portion and the small-diameter portion, and the insertion amount of the drain hose is regulated by the step portion. It is related to the receptacle.

  Here, the drain pan is a drain pan arranged on the lower side of the heat exchanger, and when the indoor air is brought into contact with the fins of the heat exchanger by a blower, cooling or heating is performed, and the indoor air is also converted into the heat exchanger. The drain pan may receive dew that condenses on the fin when it comes into contact with the fin. A plurality of protrusions may be formed on the inner peripheral surface of the large diameter portion at a predetermined interval in the axial direction. Moreover, the diameter of the inner peripheral surface of the protrusion of the large diameter portion may be a dimension in a range of 92 to 99% of the maximum outer diameter portion of the drainage hose. Further, a drain hose in which a coiled core wire is covered with a synthetic resin or rubber may be inserted.

  The main idea of the present application is that the receiving tube that receives the lower end on the front end side of the drainage hose connected to the drain pan of the air conditioner installed indoors has a slight frictional force between the inner peripheral surface and the drainage hose. Protruding ridges are formed to prevent the drainage, a large-diameter portion into which the drainage hose is inserted from the upper opening, and a male screw that is provided on the lower end side of the large-diameter portion and that connects to the drain pipe on the lower end side outer peripheral surface A step portion having an inclined inner peripheral surface is formed between the large diameter portion and the small diameter portion, and the insertion amount of the drainage hose is regulated by the step portion. It is a thing.

  Therefore, according to such a drain receptacle, only by inserting the lower end of the drain hose connected to the drain pan into the drain receptacle, there is little friction between the receptacle and the drain hose. A force is generated, which prevents the drainage hose from falling off. Moreover, since the amount of drainage hose inserted is regulated by the inclined step between the large diameter portion and the small diameter portion, the amount of drainage hose insertion does not vary, and the amount of connection to the drainage hose is ensured. It will be regulated. Moreover, since it is not necessary to screw the front end portion of the drainage hose with a screw and it is only necessary to insert the drain hose into the receiving tube, the assembling workability is improved.

It is a principal part perspective view of the indoor fan coil unit used for the air conditioner of a building. It is a principal part sectional side view which shows the internal structure. It is a longitudinal cross-sectional view of the floor surface which shows the connection of the drainage hose and drainage pipe connected to the drain pan. It is an external appearance perspective view of the drain cylinder. It is a top view of the receptacle for the drainage. It is the front view and longitudinal cross-sectional view of the drain receptacle. It is principal part sectional drawing which shows the connection of the drainage hose with respect to the drain receptacle.

  Hereinafter, the present invention will be described by way of an embodiment. FIG. 1 shows an indoor installation type fan coil unit of a building air conditioner in which the drainage receptacle of the present embodiment is used. This fan coil unit includes an outer casing 10 having a flat rectangular parallelepiped shape, A cold / hot water coil 11 constituting a heat exchanger is disposed in the outer casing 10. The cold / hot water coil 11 is a heat exchanger that circulates cold water or hot water from the outside. A plurality of fins are attached to the cold water / hot water drain pipe in close proximity to each other. The hot water is circulated. In addition, inspection openings 13 are provided on the upper surface of the outer casing 10 on the left and right sides thereof, and can be opened and closed by an inspection lid 14. Also, a blower outlet 15 is provided on the upper surface between the right and left inspection openings, and cooled or warmed air is blown out through the blower outlet 15. An operation unit such as a switch 16 is provided on the left front surface.

  Next, a slender drain pan 20 extending in the lateral direction is attached to the lower part of the cold / hot water coil 11 constituting the heat exchanger. A pair of left and right blowers 21 are arranged below the drain pan 20, and the blowers 21 on both sides are driven simultaneously by a motor 22 located between the two. An air intake port 23 is provided on the front side of the lower portion of the outer casing 10, and an air filter 24 is disposed immediately above the air intake port 23.

  In the indoor-installed fan coil unit as described above, cold water of 5 to 10 ° C. is allowed to flow from outside to the cold / hot water coil 11 through the cold / hot water pipe 12 during cooling. Then, the fin portion of the cold / hot water coil 11 is cooled. And the indoor air taken in from the air inlet 23 by the motor 22 and filtered by the air filter 24 is made to contact the fin of the cold / hot water coil 11 which comprises a heat exchanger. Then, the indoor air comes into contact with the fins of the cold / hot water coil 11 and is cooled, and thereafter, the room air is discharged upward from the outlet 15 to cool the room. In addition, when there is much moisture in the air taken in through the air intake port 23, when this air comes into contact with the fins of the cold / hot water coil 11, the moisture is condensed, and the condensed moisture falls to the drain pan 20. It has become. The condensed water that has fallen on the drain pan 20 is discharged by a drain hose 28 described later.

  Next, in the case of heating, hot water of 30 to 35 ° C. is circulated through the cold / hot water coil 11 through the cold / hot water pipe 12. Then, the air taken in at the air inlet 23 and passed through the air filter 24 is brought into contact with the fin of the cold / hot water coil 11 by the pair of blowers 21 driven by the motor 22, thereby contacting the interior of the fin portion. Air is heated and heating is performed. During heating, no condensation occurs on the fin portions of the cold / hot water coil 11.

  Next, a structure for drainage by the drainage hose 28 connected to the drain pan 20 will be described. As shown in FIG. 3, the drain hose 28 is connected and fixed to a drain cylinder 29 provided at the end of the drain pan 20 using a fixing means such as a flexible band 30. A through hole 32 is formed in the slab 31 on the floor surface of the building where the fan coil unit is installed, and a heat insulating material 33 is filled in the through hole 32. An insertion hole 34 is formed at the center of the heat insulating material 33, and a receiving cylinder 35 is inserted into the insertion hole 34. The receiving cylinder 35 is screwed to the drain pipe 36 on the lower end side with a screw.

  Next, the structure of the receiving cylinder 35 will be described with reference to FIGS. The receiving cylinder 35 includes an upper large-diameter portion 41 and a lower small-diameter portion 42, and the upper end side of the large-diameter portion 41 is an upper opening 43. On the inner peripheral side of the large-diameter portion 41, ring-shaped protrusions 45 and 46 are formed in two upper and lower stages so as to protrude toward the center side. The lower end side of the large diameter portion 41 is an inclined step portion 47, and the lower end side of the inclined step portion 47 communicates with the small diameter portion 42. A male screw 48 is formed on the outer peripheral surface on the lower end side of the small diameter portion 42. A male screw 48 is a screw for connecting to the drain pipe 36.

  The large-diameter portion 41 of the receiving cylinder 35 is made of a stainless steel pipe having an outer diameter of 34 mm, an inner diameter of 32 mm, for example, a thickness of 1 mm. Then, the outer peripheral surface of such a stainless steel pipe is drawn, thereby forming a pair of protrusions 45 and 46 and an inclined step portion 47 on the lower end side. The protrusion amount to the center side of the protrusions 45 and 46 at this time is set within a range of 1 to 1.5 mm. Therefore, the inner diameters of the protrusions 45 and 46 are set between 29 and 30 mm.

  And as a drainage hose inserted in the receiving cylinder 35 provided with the large diameter part 41 which has such protrusions 45 and 46, the thing whose outer diameter is 30.8 mm is used, for example. The hose having an outer diameter of 30.8 mm may be a bellows hose 28 with a core wire as shown in FIG. 7, for example, and the outer diameter at the core wire portion is set to a value of 30.8 mm. Accordingly, an interference fit of at least 8 mm is provided with respect to the inner diameter of the protrusions 45 and 46, and thus, a slight gap is formed between the drain hose 28 and the protrusions 45 and 46 of the large-diameter portion 41 of the receiving tube 35. A frictional force is generated. That is, the drainage hose 28 is inserted into the receiving tube 35 by the frictional force of the inner peripheral surfaces of the protrusions 45 and 46.

  The dimensional ratio between the drain hose 28 and the inner peripheral surface of the ridges 45, 46 formed on the large diameter portion 41 of the receiving cylinder 35 is the same as that of the inner peripheral surface of the ridges 45, 46 of the large diameter portion 41. The diameter is preferably in the range of 92 to 99% of the maximum outer diameter portion of the drainage hose 28. When this value exceeds 99%, the frictional force between the receiving tube 35 and the drainage hose 28 is insufficient, and the drainage hose 28 easily falls off. On the other hand, when this value is smaller than 92%, a large force is required to insert the leading end portion of the drainage hose 28 into the cylinder 35, and the workability deteriorates. In some cases, the drainage hose 28 or the receiving cylinder 35 may be deformed. Therefore, it is preferable to be in the range of 92 to 99%.

  As shown in the drawing, the lower end side of the receiving tube 35 is connected to the drain pipe 36 with a male screw 48 in the insertion hole 34 of the heat insulating material 33 filled in the through hole 32 of the floor surface 31.

  According to such a drainage structure of the drain pan 20, the connecting hose 28 is locked to the protrusions 45, 46 of the large-diameter portion 41 of the receiving tube 35 by a slight frictional force, so Can be fixed. Further, the insertion depth of the drainage hose 28 is regulated by an inclined step 47 between the large-diameter portion 41 and the small-diameter portion 42 of the receiving cylinder 35, whereby the drainage hose 28 is inserted into the receiving cylinder 35. The depth is almost constant. This value is long enough to reliably prevent the drainage hose 28 from falling off the receiving tube 35. The connecting hose 28 is connected to the receiving cylinder 35 by simply inserting the draining hose 28 into the receiving cylinder 35, and does not require any work such as screwing. Therefore, the connection work becomes very simple. And there is almost no gap between the lower end on the front end side of the connecting hose 28 and the large-diameter portion 41 of the receiving cylinder 35. For this reason, dust and foreign matter enter the drain pipe 36 through the receiving cylinder 35. This prevents an accident in which the drain pipe 36 is clogged.

  While the present invention has been described with reference to the illustrated embodiment, the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the technical idea of the present invention. For example, the above embodiment relates to a structure for drainage from a drain pan in an indoor fan coil unit using a heat exchanger composed of a cold / hot water coil. The present invention devised a so-called heat pump type air conditioner for circulating a refrigerant. It can also be used for drainage from the drain pan of indoor units. Further, as the drainage hose 28, it is possible to use a hose containing a wire mesh or a simple synthetic resin hose without necessarily using a bellows hose containing a core wire.

  The present invention can be used to drain condensed water generated in an oil pan of an indoor unit for air conditioning in a building or the like.

10 Outer casing 11 Cold / hot water coil (heat exchanger)
12 Hot / cold water pipe 13 Inspection opening 14 Inspection lid 15 Outlet 16 Switch 20 Drain pan 21 Blower 22 Motor 23 Air intake 24 Air filter 28 Drain hose 29 Drain tube 30 Flexible band 31 Slab (floor surface)
32 Through-hole 33 Heat insulating material 34 Insertion hole 35 Cylinder 36 Drain pipe 41 Large diameter part 42 Small diameter part 43 Upper opening 45, 46 Projection 47 Inclined step part 48 Male thread

Claims (5)

In the receiving tube that receives the lower end on the tip side of the drainage hose connected to the drain pan of the air conditioner installed indoors,
A protrusion that is prevented from coming off by a slight frictional force is formed between the inner peripheral surface and the drainage hose, and a large-diameter portion into which the drainage hose is inserted from the upper opening,
A small-diameter portion provided on the lower end side of the large-diameter portion, and formed with a male screw connected to the drain pipe on the lower-end-side outer peripheral surface;
A step portion having an inclined inner peripheral surface is formed between the large-diameter portion and the small-diameter portion, and the insertion amount of the drain hose is regulated by the step portion. A receptacle.   The drain pan is a drain pan disposed on the lower side of the heat exchanger, and when the indoor air is brought into contact with the fins of the heat exchanger by a blower, cooling or heating is performed, and indoor air is applied to the fins of the heat exchanger. The drain pan according to claim 1, wherein the drain pan receives dew that is condensed on the fin when contacted.   2. The drainage receptacle according to claim 1, wherein a plurality of protrusions are formed on the inner peripheral surface of the large-diameter portion at predetermined intervals in the axial direction.   4. A drainage receptacle according to claim 3, wherein the diameter of the inner peripheral surface of the ridge of the large diameter portion is in a range of 92 to 99% of the maximum outer diameter portion of the drainage hose. .   The drainage hose according to claim 1, wherein a drainage hose having a coiled core wire covered with a synthetic resin or rubber is inserted.

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