JP4007996B2 - Drain hose outside air intrusion prevention device - Google Patents

Description

  The present invention is attached to a drain hose for draining drain water generated by the operation of an indoor unit such as an air conditioner, and the drain water flows backward to the indoor unit side, or outside air passes through the indoor unit through the drain hose to the indoor part. The present invention relates to a drain hose outside air intrusion prevention device for preventing adverse effects such as intrusion into the water and generating abnormal noise.

  Conventionally, indoor units such as air conditioners have been provided with a drain outlet for draining drain water generated during operation, and one end of the indoor unit side drain hose is connected to the drain outlet, such as a house wall. The drain hose for extension which guides and drains to a predetermined location is connected to the other end of the indoor unit side drain hose if necessary.

  At this time, the other end of the indoor unit side drain hose or the other end of the extension drain hose connected thereto is always open, so that the drain water flows backward to the indoor unit side, and the outside air passes through these indoor units. Intrudes indoors and generates noise. That is, for example, in a high-rise apartment with high airtightness, when indoors are under negative pressure, drain water may flow back to the indoor unit side through the drain hose during operation of the indoor unit, which may generate an unpleasant noise. . Further, outside air such as hot air in summer and cold air in winter invades from the drain hose, and this extra energy is wasted in the indoor unit.

  For this reason, in recent years, various outdoor air intrusion prevention devices have been provided that are connected between the indoor unit side drain hose and the extension drain hose or by appropriately cutting them and communicating with the cut portions. Has been. For example, a valve body made of an elastic membrane material is provided inside the valve housing that is pushed and bent by the pressure of drain water during operation of an indoor unit such as an air conditioner, and is elastically restored to the closed state at all times when stopped. There is a check valve structure.

  Also, an extension drain hose is connected to a cylindrical case body having a plurality of air holes, an indoor unit side drain hose is connected to a lid body that closes the cylindrical case body, and a center attached to the lid body side is There is a non-return valve structure in which a long and narrow elastic cylinder is exposed to the inside of the cylindrical case body.

  In addition, a slanted opening for connecting the inside of both drain hoses is provided in the housing in which the indoor unit side drain hose is connected to one end and the extension drain hose is connected to the other end. A reverse valve comprising a valve body that is oscillated and urged by its own weight to constantly close the opening, and is opened by being pushed by the drain water pressure generated during the operation of the indoor unit. Various outside air intrusion prevention devices such as those with a stop valve structure have been proposed.

nothing special

  However, the conventional outside air intrusion prevention device having such a check valve structure has a problem that the valve itself has a complicated structure and the cost is considerably increased.

  Therefore, the present invention has been created in view of the conventional circumstances as described above, and can be manufactured with a simple structure and at a low cost. Further, the indoor and outdoor air conduction by the drain hose is interrupted, and the inside and outside of the present invention is cut off. An object of the present invention is to provide a drain hose preventing entry device for a drain hose that can easily drain only the drain water of the indoor unit to the outside while maintaining the airtightness of the indoor unit.

In order to solve the above-described problem, in the present invention, an indoor unit side drain hose S1 connected to a drain outlet for draining drain water generated during operation of the indoor unit P and going out to the outdoors through a wall. 1 is connected to the outdoor drain hose S2 and the other end is connected to the outdoor drain hose S2. A lower housing 2 having a female screw cylinder portion 2A and a vent hole 2C on the side surface, one end connected to the indoor unit side drain hose S1, and the other end female screw cylinder portion of the lower housing 2. The upper housing 3 having a male threaded cylinder portion 3A that is screwed into and connected to 2A can be fixed to one end open side of the synthetic resin cylindrical bag-like throttle valve 5, and the other end of the throttle valve 5 can be fixed. Insert the open side into the inside of the male screw cylinder 3A of the upper housing 3 with the open side facing the lower housing 2 Possible and the those comprising a attachment 4.
The throttle valve 5 can be formed using water-resistant and soft polyethylene.
The other end open side of the throttle valve 5 can be closed by the surface tension due to the drain water remaining at the other end open portion. It can be configured to be inserted into the attachment 4, folded outward at the upper end of the attachment 4, and bound by, for example, a rubber band.

In the drain hose outside air intrusion prevention device 1 according to the present invention configured as described above, a synthetic resin cylindrical bag-like shape fixed to the male screw cylinder portion 3A side of the upper housing 3 via an attachment 4 is provided. When the indoor unit P is stopped, the throttle valve 5 is closed by adhering the inner surfaces to each other by the surface tension of the remaining drain water that wets the open side of the other end facing the inside of the lower housing 2 of the throttle valve 5. Let me.
At this time, the vent hole 2C of the lower casing 2 exhausts the outside air that has entered the lower casing 2 from the extension drain hose S2 to the outside through the vent hole 2C.
On the other hand, during operation of the indoor unit P, the other end open side facing the inside of the lower housing 2 of the throttle valve 5 is caused by the water pressure of the drain water falling in the extension drain hose S2 arranged vertically. The drain water is opened and drained to the outside through the extension drain hose S2.
Since the upper end of the throttle valve 5 is folded back and tied to the upper end of the attachment 4, it is firmly fixed and can be easily replaced with a new throttle valve 5 by releasing the binding. The throttle valve 5 itself is clogged by the adhesive force of the surface tension action caused by the soft and remaining drain water, and the drain water is drained but the outside air is not allowed to enter.

  According to the present invention, a drain hose prevention device for a drain hose having a simple structure and a low cost can be manufactured, and the drain water of the indoor unit P can be blocked while shutting off air conduction between the inside and outside of the drain hose S1, S2. Can be easily discharged to the outdoors. In particular, the function can be sufficiently exerted by attaching to a drain mechanism part of an air conditioner in a highly airtight house or high-rise apartment.

  That is, the present invention is such that the lower housing 2 having one end connected to the outdoor extension drain hose S2, the other end having the female screw cylinder portion 2A, and the vent hole 2C on the side surface, and one end An upper housing 3 having a male screw cylinder portion 3A connected to the indoor unit side drain hose S1 and having the other end screwed into and connected to the female screw cylinder portion 2A of the lower housing 2, and a synthetic resin cylinder One end open side of the bag-like throttle valve 5 can be fixed, and the other end open side of the throttle valve 5 faces the inside of the lower housing 2 and can be inserted into and removed from the inside of the male threaded cylinder portion 3A of the upper housing 3. This is because the attachment 4 is provided. Thereby, the throttle valve 5 fixed to the male screw cylinder portion 3A side of the upper housing 3 through the attachment 4 wets the other end open side of the throttle valve 5 even when the indoor unit P is stopped. The inner surface of the throttle valve 5 itself adheres and closes due to the surface tension of the drain water. For example, intrusion of outside air from the extension drain hose S2 in an air conditioner installed in a high-rise apartment or high-airtight house, It is possible to prevent the backflow of drain water during operation of the machine P and the generation of abnormal noise caused by this.

  Further, even when the indoor is under a negative pressure, it is possible to easily block outside air that is about to enter from the extension drain hose S2, such as hot air in summer and cold air in winter. Since extra energy associated with intrusion or the like is not wasted in the indoor unit, it is useful for energy saving operation of the air conditioner itself. Moreover, since the odor due to intrusion of outside air can be blocked, discomfort due to intrusion of bad odor can also be prevented.

  Furthermore, since the throttle valve 5 is made of a synthetic resin bag, the throttle valve 5 can be manufactured at a lower cost than the conventional product and has a compact configuration. For example, the throttle valve 5 can be easily attached to a narrow space in the decorative cover. In addition, since the lower casing 2 and the upper casing 3 are transparently divided into each other, for example, the inner casing can be easily checked from the outside, and can be easily inspected and cleaned.

  Moreover, the throttle valve 5 itself is made of water-resistant and soft polyethylene, so that it can be substituted by a versatile bag corresponding to the size of the attachment 4 and is much more excellent than the conventional check valve structure. It can be manufactured at low cost. Moreover, the open end of the throttle valve 5 is inserted into the attachment 4 and can be fixed by, for example, a rubber band 6 so as to be folded and tied outward at the upper end of the attachment 4. The attachment and detachment is easy and the attachment state can be ensured.

  Note that the reference numerals added in the means for solving the above-described problems and the effects of the invention are given for easy reference to the parts showing the components shown in the drawings. The present invention is not limited to the structure / shape indicated by the reference numeral.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings. Reference numeral 1 shown in the figure denotes a drain for draining drain water generated by the operation of an indoor unit P such as an air conditioner. It is an outside air intrusion prevention device attached to the hose (S1, S2). In the illustrated example, the drain hose (S1, S2) is appropriately cut at a location, attached to the cut location, and the cut location is communicated via the outside air intrusion prevention device 1. The indoor unit side drain hose S1 and the extension drain hose S2 are described as being connected to each other. Of course, even if it is separated in this way from the beginning, the drain hose that is originally one piece may be cut and attached, and the selection of the attachment form is arbitrary.

  That is, as shown in FIG. 3, for example, an indoor unit P such as an air conditioner connected to an outdoor unit Q incorporating a compressor, an outdoor heat exchanger or the like by a refrigerant circulation conduit R penetrating the outdoor wall of the house, A drain drain (not shown) for draining the generated drain water is provided, and one end of the indoor unit side drain hose S1 penetrating the outdoor wall of the house is connected to the drain drain port, and the indoor unit side goes out from the outer wall. An outdoor drain hose S2 is connected to the other end of the drain hose S1 via an outside air intrusion prevention device 1 according to the present invention.

  As shown in FIGS. 1 and 2, the outside air intrusion prevention device 1 itself is made of a K resin (trade name) used as a medical material such as a prosthetic eye, or a material such as a polyolefin resin such as polyethylene, polypropylene, or polystyrene. Each of the transparent and colored transparent lower housing 2, upper housing 3, and attachment 4, which is formed into a substantially cylindrical shape using the material, and water-resistant and soft cylindrical bag-shaped polyethylene, for example, are used. The throttle valve 5 is composed of the same.

  The lower housing 2 is provided with a connecting opening 2B having a small diameter in a stepped shape at one end thereof, and a flexible outdoor extension drain hose S2 formed in a wavy cross section there. One end opening side is inserted and connected. Also, the other end side of the lower housing 2 is integrally provided with a female screw cylinder portion 2A having a slightly larger diameter than the outer diameter of the lower housing 2 itself and having a spiral recess formed on the inner periphery of the cylinder. Further, a plurality of air holes 2C are formed in the peripheral surface of the lower housing 2 so that outside air that has entered the lower housing 2 can be exhausted to the outside.

  The connecting port 2B is formed in a two-stage shape having large and small different diameters. For example, the connecting port 2B is divided into a small diameter portion having an outer diameter of 14 mm and a large diameter portion having an outer diameter of 16 mm. Even if the drain hose S2 has a large and small diameter, they are selected so that they can be connected and are considered to be versatile. Of course, this extension drain hose S2 may be used so as to be interposed at the cutting site by cutting the end portion of the indoor unit side drain hose S1 connected to the indoor unit P. The connection outlet 2B may be used so as to be ventilated with the outside air as it is.

  The upper casing 3 has a constriction formed in a plurality of stages on one end side and a connection receiving port 3B having a diameter slightly larger than the outer diameter of the indoor unit side drain hose S1, and the indoor unit side drain hose is provided there. One end opening side of S1 is inserted and connected in a state of being locked at the constricted portion. Further, on the other end side of the upper casing 3, a male threaded cylinder part 3A formed by forming a spiral ridge on the outer periphery of the cylindrical body is integrally formed. The male screw cylinder portion 3A has a large and small diameter so that the female screw cylinder portion 2A is screwed so as to be screwed and connected.

  The attachment 4 is formed by a small-diameter cylindrical body that is fitted inside the male screw cylinder portion 3A of the upper housing 3, and the friction at the time of insertion inside the male screw cylinder portion 3A is slightly reduced in the center. A constriction is formed to facilitate insertion and removal. With this attachment 4, one end open side of the synthetic resin cylindrical bag-like throttle valve 5 is fixed to the male screw cylinder portion 3A side of the upper casing 3, and the other end open side of the throttle valve 5 is fixed to the lower casing. 2 It faces the inside.

  The throttle valve 5 is formed by folding and reversing one end opening edge side of an elongated cylindrical bag having a predetermined diameter outward to form a folded portion 5A, and after inserting the other end side of the cylindrical bag from the one end opening side of the attachment 4. The one end opening edge is held so as to hang over the folded portion 5A, and is tied to the constricted portion by a rubber band 6 so that it can be fixed to the attachment 4 in a strong and firm state. By fitting the attachment 4 with the throttle valve 5 fixed in this manner inside the male threaded cylinder portion 3A of the upper casing 3, the throttle valve 5 itself is firmly fixed to the upper casing 3. is there. The rubber band 6 attaches the throttle valve 5 to the attachment 4 and can be substituted by a string material or the like.

  Next, in order to explain an example of assembly, use, and operation of the best mode configured as described above, the indoor unit P and the outdoor unit Q are connected and installed in a refrigerant circulation conduit R. Then, the indoor unit side drain hose S1 is made to go outside through the outer wall. First, in the outside air intrusion prevention device 1, when the throttle valve 5 is attached to the attachment 4, the lower housing 2, the upper housing 3, and the attachment 4 are disassembled in advance. Then, the cylindrical bag one end opening edge side of the throttle valve 5 is folded outward and reversed to form a folded portion 5A, and after the other end side of the cylindrical bag is inserted from one end opening side of the attachment 4, the one end opening edge portion is inserted. The folded portion 5 </ b> A is held so as to be hung and firmly bound with a rubber band 6. Note that the folded portion 5A may be formed by folding the throttle valve 5 once inserted into the attachment 4 after the opening edge side of the tubular throttle valve 5 is inserted, and this can be arbitrarily selected.

  In this state, the attachment 4 is fitted inside the male screw cylinder 3A of the upper housing 3, and the folded portion 5A of the throttle valve 5 is sandwiched between the male screw cylinder 3A and the attachment 4 as shown in FIG. The male screw cylinder portion 3A of the upper housing 3 is screwed into the female screw cylinder portion 2A of the lower housing 2 in advance. Thus, the outside air intrusion prevention device 1 is assembled, the outside air intrusion prevention device 1 is connected and attached to the indoor unit side drain hose S1, and the extension drain hose S2 is further attached to the lower housing 2.

  That is, one end opening side of the indoor unit side drain hose S1 is inserted into the connection receiving port 3B of the upper housing 3 and connected in a state of being locked at the constricted portion. Further, one end opening side of the outdoor extension drain hose S2 is inserted and connected to the connection opening 2B of the lower housing 2. At this time, both drain hoses S1 and S2 are firmly inserted to the back and fixed with seal tape or the like. The outdoor air intrusion prevention device 1 is positioned so as to be vertical on, for example, an outdoor wall surface. At this time, the outdoor air intrusion prevention device 1 itself has a sufficient sealing water height corresponding to the negative pressure on the indoor side, for example, about 100 mm from the ground. Install in the state secured above.

  When the indoor unit P is stopped, the inner surfaces of the throttle valve 5 adhere to each other due to the surface tension of the remaining drain water that wets the open side of the other end facing the inside of the lower housing 2 of the throttle valve 5. Even if the airtight indoors are in a negative pressure state, the outside air that has entered the lower housing 2 from the extension drain hose S2 does not enter the indoors without entering the indoors. The air is exhausted to the outside through the vent hole 2C.

  On the other hand, during the operation of the indoor unit P, the other end open side facing the inside of the lower housing 2 of the throttle valve 5 is forcibly opened by the water pressure of the drain water, and the drain water is the extension drain. The water is discharged to the outside through the hose S2. At this time, due to the flexibility of the throttle valve 5 made of soft polyethylene, the drain water can be efficiently drained to the outside without causing a back flow of the drain water or an abnormal noise due to this.

BRIEF DESCRIPTION OF THE DRAWINGS The best form for implementing this invention is shown, (a) is a disassembled perspective view of an external air intrusion prevention apparatus, (b) is a perspective view which shows the use condition after an assembly of an external air intrusion prevention apparatus. Similarly, it shows the use state of the outside air intrusion prevention device, (a) is a sectional view showing the drainage state of the drain water, (b) is a sectional view of the state where the throttle valve is closed and the outside air is shut off. . It is a perspective view which shows the state which similarly attached the external air penetration | invasion prevention apparatus to the indoor unit side drain hose from an indoor unit.

Explanation of symbols

P ... Indoor unit Q ... Outdoor unit R ... Refrigerant circulation conduit S1 ... Indoor unit side drain hose S2 ... Extension drain hose 1 ... Outside air intrusion prevention device 2 ... Lower casing 2A ... Female screw cylinder 2B ... Connection outlet 2C ... Vent 3 ... Upper housing 3A ... Male screw cylinder 3B ... Connection receptacle 4 ... Attachment 5 ... Throttle valve 5A ... Folding part 6 ... Rubber band

Claims (2)

  Connected to the drain outlet that drains the drain water generated during the operation of the indoor unit, between the indoor unit side drain hose that goes out through the wall and the extension drain hose arranged vertically outdoors A device for preventing outside air intrusion of a drain hose to be communicated, wherein one end is connected to an outdoor drain hose, the other end has a female screw cylinder, and a side surface has a vent hole. Body, upper housing having one end connected to the indoor unit side drain hose and the other end screwed into the female screw cylinder of the lower housing and connected thereto, and flexible soft It is possible to fix the open end of the throttle valve in the synthetic resin cylindrical bag shape, and insert the open end of the other end of the throttle valve, which tends to close, into the lower housing, and insert it inside the male screw cylinder of the upper housing. It is equipped with a removable attachment, and the open end of the throttle valve is attached The other end of the throttle valve is closed by the surface tension of the drain water remaining at the open end of the other end. An outside air intrusion prevention device for a drain hose characterized by comprising:   2. The drain hose outside air intrusion prevention device according to claim 1, wherein the throttle valve is water-resistant and uses soft polyethylene.

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