KR20040060748A - Drain hose - Google Patents

Abstract

PURPOSE: A drain hose is provided to realize stable connection by increasing the deformation intensity of a connecting cylinder connected with a drain outlet. CONSTITUTION: A connecting cylinder(4) connected with a drain outlet(3) of an air conditioning system is installed at one end of a hose body(2) covered with an insulating outer casing member(40) in a drain hose(1). A connecting member(45) connecting the end portion of the outer casing member outside is fitted to an annular recessed groove(32) formed in the outer face of the connecting cylinder. Physical connection with the outer casing member is increased, and the outer casing member is attached stably. The strength around the recessed groove is increased, and the deformation intensity of the connecting cylinder is enhanced.

Description

Drain Hose {DRAIN HOSE}

The present invention mainly relates to a drain hose connected to a drain outlet such as an indoor unit of an air conditioning apparatus.

As a conventional drain hose, it is known that a flexible bellows type hose has a structure in which one end side of the main body is integrally formed with a connecting cylinder for insertion connection to a drain outlet of an indoor unit.

In this type of drain hose, as disclosed in Patent Literatures 1 and 2, for example, in order to prevent condensation from occurring on the outer circumferential surface of the hose main body, the outer circumferential surface of the hose main body is a heat insulating outer cylinder. Covering with a member is routinely performed.

[Patent Document 1] Japanese Utility Model Laid-Open No. 54-126215

[Patent Document 2] Japanese Patent Application Laid-Open No. 2000-4756

However, in the conventional drain hose in which the hose body is covered with the outer cylinder member for heat insulation, the outer cylinder member is simply fitted to the hose main body from the outside, or as disclosed in Patent Literature 1, as described in Patent Document 1, There is a thing which fixed by clamping the outer cylinder member which pinched | interposed. In either case, however, there is not enough physical cohesion between the hose and the outer cylinder member. Therefore, when carrying or constructing the hose, the outer cylinder member is misaligned with the hose body or, in some cases, there is a problem of detachment. It was easy to occur.

In addition, the strength of the connecting cylinder connected to the drain outlet is generally weak. Therefore, for example, in the construction of a hose, if the force when the hose body is bent acts on the connecting cylinder, deformation or buckling occurs in the connecting cylinder. do. As a result, the watertightness between a connection cylinder and a drain discharge port may be impaired, and the problem that a connection cylinder may come out of a drain discharge port may arise.

For example, in Patent Document 2, in order to prevent deformation of the connection cylinder of the drain hose, the connection side distal end is brought into contact with or close to the discharge pipe of the drain discharge port. A structure is disclosed in which the tip portion immediately contacts the discharge pipe. However, in this case, especially when the drain hose is thin and light and has flexibility, when the connection side tip contacts the discharge pipe and tries to prevent further inclination, the connection side tip becomes a point and the connection port of the connection cylinder. Is likely to deform into an elliptical shape and may even promote deformation, and thus cannot be said to be an effective means.

Therefore, the present invention solves the above problem, and strengthens the binding with the outer cylinder member, thereby stably attaching the outer cylinder member, and at the same time increases the deformation strength of the connecting cylinder to realize a stable connection to the drain outlet. It is for the purpose of providing.

1 is a front view of a drain hose according to one embodiment of the present invention.

2 is a partially enlarged view of FIG. 1;

Fig. 3 is an enlarged perspective view of the connecting cylinder portion of Fig. 2.

Fig. 4 is an enlarged longitudinal sectional view of the connecting cylinder portion of Fig. 3.

5 is a front view of a drain hose equipped with an outer cylinder member.

Fig. 6 is an enlarged longitudinal sectional view of the connecting cylinder portion of Fig. 5.

7 is an enlarged longitudinal sectional view showing a state in which a drain hose is connected to a drain outlet port;

8 is an enlarged longitudinal sectional view of a connecting cylinder portion of a drain hose in another embodiment;

<Explanation of symbols for main parts of drawing>

1: drain hose

2: hose body

3: drain outlet

4: connection cylinder

6: annular projection

9: connection port

20: accommodation home

21: Packing

32: concave groove (third concave groove)

40: outer cylinder member

45: binding member

51: discharge pipe

In order to solve the said subject, the drain hose of this invention is a drain hose formed by providing the connection cylinder connected to the drain outlet of air conditioners, etc. in the one end side of the hose main body covered by the heat insulation outer cylinder member, An annular concave groove is formed in the outer circumferential surface side to which the binding member which fastens the edge part of the said outer cylinder member from the outer side enters.

The inner diameter of the connecting cylinder is minimized in the concave groove portion. The inner diameter of the concave groove portion may be larger, smaller or smaller than the inner diameter of the hose body. Moreover, the annular accommodating groove which accommodates the packing pinched in the outer side of the discharge pipe of a drain discharge port is formed in the inner peripheral surface side of the said connection cylinder. Moreover, in the said connection cylinder, the accommodating groove is formed in the connection port side rather than the recessed groove.

Moreover, the said hose main body is made into the bellows shape which protruded and formed the some annular protrusion, and the space | interval of the annular protrusion in the range of required length is narrower than the other part from the end part which continues to the connection cylinder of the hose main body. Doing.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described in detail based on drawing. The drain hose 1 which concerns on one Embodiment of this invention is a blow molded article made from synthetic resin, such as polyolefin resin, such as polyethylene (PE), polypropylene (PP), and polyvinyl chloride resin (PVC), for example. molding products), and are formed to have substantially the same thickness over the entire length in the axial direction.

As shown in FIG. 1, this drain hose 1 is a female connection cylinder (1) which is connected to the drain outlet 3 in the indoor unit of the air conditioning apparatus on one end side of the flexible hose body 2. 4) is integrally formed, and the other end side is integrally formed with a male connecting cylinder 5 which is connected to a separate drain hose 1 for hose extension.

The hose main body 2 has a bellows shape in which a plurality of annular projections 6, 6, ... are expanded and formed over the entire length of the axial direction, for example, and the structure is easy to bend deformation. 1 and 2, the annular projections 6, 6, over the range A of the required length from one end portion connected to the connecting cylinder 4 in the hose main body 2. The space | interval of…) is narrowed compared with the space | interval of other part B, ie, the annular projection 6, 6, ... in the center part or the other end part. As a result, the end portion near the one end of the connecting cylinder 4 has a structure that tends to bend at a more steeper angle than other portions.

As shown in FIG. 3 and FIG. 4, the connecting cylinder 4 has, for example, four annular projections 10 to 13 extending from the distal end portion on the connector 9 side to the proximal end portion on the hose main body 2 side. It is formed to protrude. The 1st annular convex part 10 by the side of the connection port 9 is formed in the L shape which the cross section fell substantially, for example, and the remaining 2nd-4th annular convex parts 11-13 are substantially trapezoidal in cross section, for example. Formed. The outer diameter of these annular convex parts 10-13 is about the same magnitude | size, and the 2nd annular convex part 11 has the largest width | variety in the axial direction of the annular convex parts 10-13.

And the annular packing 21 is accommodated in the annular accommodating groove 20 formed in the inner peripheral surface side of the 2nd annular convex part 11. The cross section of this packing 21 is formed in substantially rectangular shape, and the width W1 in the axial direction thereof is smaller than the width W2 in the axial direction of the receiving groove 20. Therefore, in the accommodating state of the packing 21, the side surfaces 22 and 22 orthogonal to the axial direction of the packing 21 and the groove side surfaces 24 and 24 raised from the groove bottom surface 23 of the receiving groove 20. The gaps 25 and 25 are secured in between. These gaps 25 and 25 are secured even in a state where the packing 21 is sandwiched outside the discharge pipe 51 described later. In this way, the packing 21 can be easily and reliably mounted in the receiving groove by making the structure in which the packing 21 is accommodated in the receiving groove 20 to accommodate therein.

Further, between the first and second annular projections 10 and 11 and between the second and third annular projections 11 and 12, annular recesses 30 and 31 having a narrow width in the axial direction are formed, respectively. Between the third and fourth annular projections 12 and 13, an annular concave groove 32 having a wide axial direction is formed. That is, the first and second concave grooves 30 and 31 are formed by fitting the accommodation grooves 20 for accommodating the packing 21, and are formed more than the accommodation grooves 20 and the concave grooves 30 and 31. The third concave groove 32 is formed at the proximal end.

The inner diameter of the connecting cylinder 4 is minimized at the third concave groove 32. That is, among the groove bottoms 33 to 35 of the annular recesses 30 to 32, the groove bottom face 35 of the third recessed groove 32 is located at the innermost side in the radially inner direction, and the recessed grooves 30 to 32 are formed. Among the 32, the third concave groove 32 is the deepest groove. The inner diameter of the third concave groove 32 is substantially similar to the inner diameter of the bellows concave portion 39 of the hose main body 2, but may be larger or smaller than this.

These annular concave grooves 30 to 32 have a function as ribs to increase the deformation strength of the connecting cylinder 4, and in particular, the rib effect of the third concave groove 32 having a wide and deep groove bottom is increased. have.

In the drain hose 1 comprised in this way, as shown in FIG. 5, in order to prevent the dew condensation generate | occur | producing on the outer peripheral surface of the hose main body 2, the hose main body 2 is the outer cylinder member for heat insulation 40 ) Is covered by.

The outer cylinder member 40 cut | disconnects the foamed synthetic resin material in strip shape by the required width | variety using the independent foamed foamed resin material which heat-bonded PE resin film and formed the outer skin layer, for example, between longitudinal side edge parts. It rounds in the circumferential direction so that it contacts, and it heat-fuses these side edge parts to contact, and is formed in the cylindrical shape. Moreover, as foamed synthetic resin material which comprises the outer cylinder member 40, although it is preferable that it is an independent bubble foam, in order to improve the heat insulation effect which prevents penetration of water, it is not limited to this.

Fine wrinkles 43 are formed on the outer circumferential surface of the outer cylinder member 40. Thus, by performing a wrinkle process on the outer peripheral surface of the outer cylinder member 40, the wrinkles and bending wrinkles which generate | occur | produce in the outer cylinder member 40 at the time of the packing or bending construction of a hose are not noticeable, It keeps aesthetics good. Further, a plurality of grooves (not shown) are formed on the inner circumferential surface of the outer cylinder member 40 at substantially equal intervals along the axial direction, that is, the longitudinal direction.

Then, by press-fitting the drain hose 1 from the open end of the outer cylinder member 40, the outer cylinder member 40 is inserted into the hose main body 2 of the drain hose 1 so that the hose main body 2 is opened. I'm covering it.

As shown in FIGS. 5 and 6, an end portion of the outer cylinder member 40 fitted to the hose body 2 is fastened from the outside by a band-shaped binding member 45 made of synthetic resin, for example, and connected to a connecting cylinder ( It is pressed by the groove bottom face 35 in the state which stuck to the 3rd recessed groove 32 of 4). In this fastening state, the binding member 45 enters the third concave groove 32. That is, all or most of the binding member 45 enters into the 3rd recessed groove 32 with the edge part of the outer cylinder member 40. FIG.

As a result, when the physical connection between the drain hose 1 and the outer cylinder member 40 is strong and the hose 1 is transported or constructed, the outer cylinder member 40 is distorted or disengaged from the hose main body 2. To prevent problems. In addition, since the outer peripheral surface of the outer cylinder member 40 is wrinkled, the binding between the binding member 45 and the outer cylinder member 40 becomes strong at the time of fastening the binding member 45, and the sliding between them is prevented. By suppressing, the outer cylinder member 40 can be attached more stably.

Further, the end of the outer cylinder member 40 and the binding member 45 enter the third concave groove 32 of the connecting cylinder 4, so that the thickness of the concave groove 32 portion of the connecting cylinder 4 is increased. In this case, the deformation strength of the connecting cylinder 4 can be further increased with the rib effect of the concave groove 32 itself. In addition, since the plurality of grooves along the longitudinal direction are formed at substantially equal intervals on the inner circumferential surface of the outer cylinder member 40, the end of the outer cylinder member 40 is closed by the third concave groove (ie, when the binding member 45 is fastened). 32, the inner circumferential surface of the third concave groove 32 can be pressed almost uniformly into the groove bottom 35 of the third concave groove 32, and the strength of the concave groove 32 portion is almost uniform over the entire circumference. It can increase.

7 shows a state in which the drain hose 1 having the above configuration is connected to the drain outlet 3 of the indoor unit. In the figure, 50 is a drain pan provided in the casing of the indoor unit, and 51 is a discharge pipe constituting the drain outlet 3.

In connecting the drain hose 1 to the drain discharge port 3, the connecting cylinder 4 of the drain hose 1 is covered with the discharge pipe 51. In this connected state, the annular projection 52 projecting from the outer circumferential surface of the discharge pipe 51 is fitted to the inner circumferential surface side of the first annular convex portion 10 of the connecting cylinder 4 to connect the connecting cylinder 4. I suppress the rattling of. In addition, the packing 21 accommodated in the receiving groove 20 of the connecting cylinder 4 is fitted outside the discharge pipe 51 to close the gap between the inner peripheral surface of the connecting cylinder 4 and the outer peripheral surface of the discharge pipe 51. I improve water tightness.

Furthermore, since the drain hose 1 connected to the drain outlet 3 can be bent at an urgent angle in the vicinity of one end of the hose main body 2 close to the connecting cylinder 4, the casing of the indoor unit is moved to the outside. It can be taken out freely, thereby increasing the degree of freedom in casing design, thereby making it possible to miniaturize the casing.

Moreover, when one end portion of the hose main body 2 close to the connecting cylinder 4 is bent at an urgent angle, the force to return to the straight line acts greatly on the connecting cylinder 4, but in such a radial outward direction. The stress can be taken out of the reinforced concave groove 32 and not propagated to the packing accommodating portion on the tip end side thereof. As a result, the deformation and buckling of the connection cylinder 4 can be prevented, and as a result, the problem of the watertightness between the drain discharge port 3 being impaired or the connection cylinder 4 deviating from the drain discharge port 3 can be prevented. have.

In addition, this invention is not limited to the said embodiment, Of course, many corrections and changes can be added to the said embodiment within the scope of the present invention.

For example, the hose body is not limited to the bellows type, but may be a spiral wave shape having a flat straight tube or a spiral protrusion having an outer circumferential surface. In addition, the number, shape, etc. of the convex part and recessed groove which were provided in the connection cylinder are not limited to the said embodiment, For example, as shown in FIG. 8, what is necessary is just to form the recessed groove in which a binding member enters at least. Furthermore, the binding member is not limited to a band-shaped one made of synthetic resin, and may be a linear member such as a wire, for example, to increase the strength of the recessed groove portion when entering the recessed groove.

As is clear from the above description, in the drain hose of the present invention, the end of the outer cylinder member and the binding member for fastening the same enter the concave groove on the outer circumferential surface side of the connecting cylinder, so that physical binding with the outer cylinder member is strengthened. The problem that the outer cylinder member is distorted or disengaged from the hose body can be prevented. Thereby, an outer cylinder member can be attached stably and the connection operation to a drain discharge port can also be performed easily.

Moreover, when the end of the outer cylinder member and the binding member enter the concave groove of the connecting cylinder, the concave groove portion of the connecting cylinder can be reinforced to increase the deformation strength of the connecting cylinder. Therefore, even when the force when the hose body is bent on the connection cylinder in the connected state to the drain outlet port, deformation or buckling does not easily occur in the connection cylinder, thereby impairing the watertightness between the drain outlet port. Can prevent the connection cylinder from deviating from the drain outlet, and maintain a stable connection state.

In addition, since the inner diameter of the concave groove portion of the connecting cylinder is reduced to suppress the protrusion amount of the concave groove portion, in particular when blow molding the drain hose, the thickness of the concave groove portion is rarely reduced. The strength can be further increased, and deformation of the connecting cylinder, buckling and the like can be further prevented.

Furthermore, as described above, the watertightness of the connection portion can be maintained satisfactorily by receiving a packing on the inner circumferential surface side of the connection cylinder with high deformation strength and preventing the gap between the connection cylinder and the discharge pipe by the packing.

In addition, by forming the receiving groove for accommodating the packing on the connection port side rather than the concave groove, the force when the hose body is bent from the reinforced concave groove portion is less likely to propagate to the packing accommodating portion on the tip side than the packing. It is possible to prevent the distortion of the strain as much as possible, and to maintain the watertightness more stably.

In addition, when one end portion of the hose body is connected to the drain outlet provided in the casing of the air conditioner by narrowing the interval between the annular projections and making it easy to bend near the one end portion near the connecting cylinder side of the hose body. The vicinity is bent at a steep angle, and the drain hose can be taken out freely from inside the casing. As a result, the degree of freedom in designing the casing increases, and the casing can be miniaturized.

Claims (5)

A drain hose provided with a connecting cylinder connected to a drain outlet of an air conditioner or the like on one end of a hose main body covered with a heat insulating outer cylinder member, wherein the end of the outer cylinder member is disposed on the outer peripheral surface side of the connecting cylinder from the outside. A drain hose comprising an annular concave groove into which a fastening member to be fastened is formed. The drain hose according to claim 1, wherein the inner diameter of the connecting cylinder is minimized in the concave groove portion. The drain hose according to claim 1, wherein an annular receiving groove is formed on an inner circumferential surface side of the connecting cylinder for accommodating a packing sandwiched outside the drain pipe of the drain outlet. The drain hose according to claim 3, wherein in the connecting cylinder, a receiving groove is formed on the connection port side rather than the concave groove. The said hose body is made into the bellows shape which protruded and provided the some annular protrusion, and it is the range of the required length from the one end continuous to the connection cylinder of the hose main body. The drain hose which narrows the space | interval of the annular projection in comparison with other parts.