JP2012225427A - Antifreezing drain hose - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an antifreezing drain hose for reducing risk of deteriorating a material of a mating drain pipe by thermal influence, while restraining freezing of drain water by heating of an electric heater.SOLUTION: This antifreezing drain hose 1 drains the drain water. The antifreezing drain hose 1 includes a base end hose part 10, an insertion tip hose part 12 integrally continuously arranged on the forward side of the base end hose part 10, the electric heater 2, and a cylindrical heat insulation layer 3. A heat radiation quantity per unit area and unit time radiated to the outer peripheral side of the heat insulation layer 3 from the electric heater 2 in the insertion tip hose part 12 is set as Qinsert. A heat radiation quantity per unit area and unit time radiated to the outer peripheral side of the heat insulation layer 3 from the electric heater 2 in the base end hose part 10 is set as Qbase. The Qinsert is set smaller than the Qbase.

Description

  The present invention relates to an anti-freezing drain hose connected to an apparatus such as a cogeneration apparatus or an air conditioner, and in particular, freezeable drain water (for example, condensed water) generated by the apparatus to the outside of the apparatus while suppressing freezing. The present invention relates to a drain hose for preventing freezing.

  The drain hose for freezing is connected to the base end hose part connected to the device and the base end hose part so that the counterpart drain pipe can be inserted on the inner peripheral wall surface side of the counterpart drain pipe. And an insertion tip hose portion provided integrally. Here, the antifreezing drain hose covers the electric heater provided in both the proximal end hose portion and the insertion distal end hose portion and the electrical heater provided in both the proximal end hose portion and the insertion distal end hose portion. And a cylindrical heat insulating layer that covers the proximal hose part and the insertion distal hose part from the outer peripheral side. When there is a risk of drain water freezing in an extremely cold region or in winter, the function of the apparatus may be hindered, and the electric heater is energized to generate heat. When the electric heater generates heat by energization in this way, the freezing of the drain water flowing through the antifreezing drain hose can be suppressed by the heat generated by the electric heater.

  In general, the counterpart drain pipe may be selected depending on circumstances on the user side. For this reason, the material of the other party drain pipe is often different depending on the user, and the other party water pipe may be made of an unexpected material. Thus, when the other party drain pipe is formed with the material which is easy to receive a heat influence, there exists a possibility that the material of the other party drain pipe may change in quality by the heat influence by heat transfer from an electric heater. When the environmental temperature is low and the condition is easy to freeze, the amount of current supplied to the electric heater is increased to prevent freezing, but the material of the mating drain pipe may be further deteriorated due to the heat effect of heat transfer from the electric heater. In this case, the drainage performance of the counterpart drainage pipe may be affected.

  Further, Patent Document 1 is connected to a flat drain guide having a resin main part that forms a flat drain flow path for draining drain water, and is inserted into and connected to the drain flow path of the drain guide. A drainage drainage device comprising a flat connector with an electric heater is disclosed. An auxiliary layer made of a material having a higher thermal conductivity than that of the main part is inserted into the drain channel formed in the main part of the drain guide. The auxiliary layer is formed of a resin having a filler such as copper having a high thermal conductivity. The drain water flowing through the drain channel flows in contact with the auxiliary layer. Patent Document 1 describes as follows. That is, since the auxiliary layer has high thermal conductivity, when the drain water comes into contact with the auxiliary layer, the auxiliary layer absorbs the heat of the drain water and increases its temperature to function as a heat storage layer. Furthermore, since the thermal conductivity of the main part that covers the auxiliary layer from the outside is lower than that of the auxiliary layer, heat radiation to the outside can be suppressed. As a result, freezing of the drain water can be suppressed even when the drain water flows intermittently in a very cold region or in winter.

  Patent Document 2 discloses a tube-shaped waterproof layer that forms the hose core from the inner peripheral side to the outer peripheral side, an electric heater that covers the waterproof layer, an insulating layer that covers the electric heater, a pressure-resistant layer, A flexible hose having a structure in which layers are sequentially laminated is disclosed. According to this, it is possible to contribute to prevention of water freezing by energizing the electric heater.

  Patent Document 3 discloses a heat insulating hose including a hose main body and a heat insulating layer formed of a foam material laminated on the hose main body, wherein a slit is formed at a predetermined distance from the shaft end of the heat insulating hose. In the meantime, a technique in which the heat insulating layer is not joined to the hose body is disclosed.

  Patent Document 4 discloses a hose anti-freezing device having a structure in which a heat generating material is disposed on a connection fitting of a pressure feeding hose and the heat generating material is covered with a heat insulating heat insulating material.

JP 2010-107169 A JP 2000-130652 A JP 2004-346976 A Registered Utility Model No. 3084293

  According to Patent Document 1, an electric heater is provided at the connecting portion. However, although the drain guide connected to the connecting portion is provided with an auxiliary layer including a copper filler having a high thermal conductivity, an electric heater is not provided. For this reason, although the drain guide is provided with an auxiliary layer that contributes to freezing suppression, the drain water flowing through the drain flow path of the drain guide is frozen when the outside air temperature is considerably low and the water is easily frozen. There is a fear. In particular, when the drain water flows intermittently, the drain water may freeze. Furthermore, when the outside air temperature is quite low and the condition is easy to freeze, the cold air of the outside air is transmitted to the drain channel from the auxiliary layer including a copper filler having a high thermal conductivity, so that it flows through the drain channel. Freezing of water may be promoted.

  According to Patent Document 2, since the electric heater is energized and generates heat, freezing of water flowing through the flexible hose is prevented. However, depending on the circumstances on the user side, the tip of the flexible hose is sometimes inserted and used on the inner peripheral wall surface side of the counterpart drain pipe so that the counterpart drain pipe is located on the outer peripheral side. In such a case, when a mating pipe made of a material that is easily affected by heat is selected, the mating drain pipe material may be deteriorated due to the thermal influence of the electric heater of the flexible hose. In particular, when the environmental temperature is low, the amount of electricity supplied to the electric heater increases and the amount of heat generated by the electric heater increases, so that the material of the mating drain pipe may be altered due to the thermal effect of the electric heater of the flexible hose. .

  According to Patent Document 3, an electric heater is not provided in the heat insulating layer. For this reason, although the heat insulation layer is coat | covered by the hose main body, when the outside temperature is low and it is the conditions where water is easy to freeze, there exists a possibility that the water which flows through a hose main body may freeze.

  Patent Document 4 is advantageous for suppressing freezing of slurry or the like flowing through a pressure feeding hose. However, due to circumstances on the user side, when the tip of the pumping hose is inserted and used on the inner peripheral wall surface side of the mating drain pipe so that the mating drain pipe is located on the outer peripheral side, it is easily affected by heat. When the mating pipe made of the material is selected, the mating drain pipe material may be deteriorated due to the heat effect of the heat generating material. In particular, when the environmental temperature is low, the amount of heat generated per unit time of the heat generating material increases, so that the material of the mating drain pipe may be altered due to the heat effect of the heat generating material.

  The present invention has been made in view of the above-described circumstances, and can prevent freezing of drain water by energization heat generation of an electric heater, suppress overheating of a counterpart drain pipe, and the counterpart drain pipe is affected by heat. Even if it is a case where it forms with an easy material, it aims at providing the drain hose for anti-freezing which can reduce the possibility that the material of the other party drain pipe will change in quality by the influence of heat.

  (1) The antifreezing drain hose according to claim 1 is an antifreezing drain hose that is connected to the apparatus and suppresses freezing of the drain water generated by the apparatus and discharges the drain water to the outside of the apparatus. The drain hose for prevention includes a proximal hose part connected to the device and a proximal hose part so that at least a part thereof can be inserted into the inner peripheral wall surface side of the counterpart drain pipe so that the counterpart drain pipe is located on the outer circumference side. Covers the insertion tip hose portion integrally provided on the front side, the electric heater provided at the proximal end hose portion and the insertion tip hose portion, and the electric heater provided at the proximal end hose portion and the insertion tip hose portion. And a cylindrical heat insulating layer that covers the base end hose part and the insertion tip hose part from the outer peripheral side, and a unit area discharged from the electric heater in the insertion tip hose part to the outer peripheral side of the cylindrical heat insulation layer The heat dissipation amount Qinsert per unit time is set to be smaller than the unit area and the heat dissipation amount Qbase per unit time released from the electric heater in the proximal hose portion to the outer peripheral side of the cylindrical heat insulating layer (Qinsert < Qbase).

  At the time of use, at least a part of the insertion tip hose portion of the drain hose for freezing prevention may be inserted into the inner peripheral wall surface side of the counterpart drainage pipe so that the peripheral wall of the counterpart drainage pipe is located on the outer peripheral side. The electric heater is energized in extremely cold areas and in winter. For this reason, freezing of drain water flowing through the proximal end hose portion and the insertion distal end hose portion is suppressed.

  When the electric heater generates heat when energized as described above, the heat generated by the electric heater is not only transferred to the proximal hose part and the insertion tip hose part, but also the peripheral wall of the mating drain pipe in which the insertion tip hose part is inserted. Heat is also transferred. In general, the partner drain pipe is often selected depending on the circumstances of the user. For this reason, the material of the other party drain pipe may be variously different depending on the user. The counterpart drain pipe may be formed of a material that is easily affected by heat. In such a case, the material of the mating drain pipe may be altered due to the thermal effect from the electric heater.

  Therefore, according to the present invention, the unit area and the amount of heat radiation Qinsert per unit time released from the electric heater in the insertion tip hose part to the outer peripheral side of the cylindrical heat insulating layer are determined from the electric heater in the proximal hose part. Is set to be smaller than the unit area and the heat release amount Qbase per unit time (Qinsert <Qbase). Therefore, the heat release amount Qinsert from the insertion tip hose portion side per unit area and unit time is set smaller than the heat release amount Qbase from the proximal end hose portion side. As a result, even when the user selects a mating pipe that is formed of a material that is easily affected by heat, the risk of the mating drain pipe material being altered by the thermal effect is reduced. The heat dissipation amounts Qinsert and Qbase can be average values per unit area and unit time when the electric heater is energized.

  Any device can be used as long as it can generate drain water. Examples of drain water include condensed water. Examples include a heat pump device used for an air conditioner that drives a compressor with an engine, a cogeneration device that rotates a generator with an engine, a fuel cell device (cogeneration device) that generates power with a fuel cell, and the like. Thus, the present invention can be applied to an apparatus that discharges condensed water obtained by condensing high-temperature exhaust gas discharged from the engine as drain water. The shape and structure of the electric heater are not particularly limited, and may be anything as long as it can suppress freezing of drain water.

  (2) According to the antifreezing drain hose according to claim 2, in the above, the electric heater is spirally wound around the proximal end hose portion and the insertion distal end hose portion, and the electric heater is inserted into the insertion distal end hose. The base end hose portion is wound relatively coarsely than the proximal end hose portion, and the proximal end hose portion is wound more densely than the insertion distal end hose portion.

  Thereby, per unit area and unit time, the heat radiation amount Qinsert released from the electric heater in the insertion tip hose part to the outer peripheral side of the cylindrical heat insulating layer is released from the electric heater in the base end hose part to the outer peripheral side of the heat insulating layer. Is set to be smaller than the heat dissipation amount Qbase (Qinsert <Qbase). Since the electric heater is spirally wound around the proximal end hose portion and the insertion distal end hose portion, it is advantageous for setting coarse and dense winding density. Furthermore, even when the proximal end hose portion and the insertion distal end hose portion are bent, the electric heater can cope with the bending.

  (3) According to the antifreezing drain hose according to claim 3, in the above, per unit area and unit time passing through the outer peripheral side of the thickness of the heat insulating layer covering the insertion tip hose portion of the cylindrical heat insulating layer The heat transfer amount is smaller than the heat transfer amount per unit area and unit time passing through the outer peripheral side of the thickness of the heat insulating layer portion covering the proximal hose portion of the cylindrical heat insulating layer. In this case, when the insertion tip hose part is inserted on the inner peripheral wall surface side of the counterpart drain pipe so that the counterpart drain pipe is located on the outer peripheral side, the electric heater is transmitted from the electric heater on the insertion tip hose part side to the counterpart drain pipe side. The unit area to be heated and the heat transfer amount Q1 per unit time are suppressed. As a result, the thermal effect in the counterpart drain pipe can be suppressed, and alteration of the counterpart drain pipe due to the thermal effect is suppressed.

  (4) According to the antifreezing drain hose according to claim 4, in the above, the thickness Tinsert of the heat insulating layer portion covering the insertion tip hose portion of the cylindrical heat insulating layer is the proximal hose of the cylindrical heat insulating layer. It is characterized by being set to be thicker than the thickness Tbase of the heat-insulating layer portion covering the portion (Tinsert> Tbase). In this case, when the insertion tip hose part is inserted on the inner peripheral wall surface side of the counterpart drain pipe so that the counterpart drain pipe is located on the outer peripheral side, the electric heater is transmitted from the electric heater on the insertion tip hose part side to the counterpart drain pipe side. The heat transfer amount Q1 to be heated is suppressed. As a result, the thermal effect in the counterpart drain pipe can be suppressed, and alteration of the counterpart drain pipe due to the thermal effect is suppressed.

  (5) According to the antifreezing drain hose according to claim 5, in the above, the inner peripheral wall surface of the mating drain pipe and the outer peripheral wall surface of the cylindrical heat insulating layer of the insertion tip hose portion are different from each other in cross section. A space for heat insulation is secured between the inner peripheral wall surface of the drain pipe and the outer peripheral wall surface of the cylindrical heat insulating layer of the insertion tip hose portion. In this case, the heat transfer per unit area and unit time from the cylindrical heat insulating layer of the insertion tip hose portion toward the inner peripheral wall surface of the counterpart drain pipe is limited by the space for heat insulation. Thereby, even if it is a case where the electric heater is provided, the protection property of the inner peripheral wall surface of the other party drainage pipe can be improved.

  According to the antifreezing drain hose according to the present invention, the amount of heat radiation Qinsert released from the electric heater in the insertion tip hose portion to the outer peripheral side of the cylindrical heat insulating layer per unit area and unit time is It is set smaller than the heat dissipation amount Qbase released from the heater to the outer peripheral side of the heat insulating layer (Qinsert <Qbase). In this case, it is possible to suppress overheating of the counterpart drain pipe while suppressing freezing of the drain water by the heat generated by the electric heater. Therefore, even if the mating drain pipe is formed of a material that is easily affected by heat, the risk of the mating drain pipe material being altered by the thermal effect can be reduced.

It is sectional drawing which concerns on Embodiment 1 and shows the state which has inserted the drain hose for freezing prevention into the other party drainage pipe. It is sectional drawing which concerns on Embodiment 1 and shows the state which has inserted the drain hose for freezing prevention into the other party drainage pipe. It is sectional drawing which concerns on Embodiment 2 and shows the state which has inserted the drain hose for freezing prevention into the other party drainage pipe. It is sectional drawing which concerns on Embodiment 3 and shows the state which has inserted the drain hose for freeze prevention into the other party drainage pipe. FIG. 10 is a perspective view schematically showing a freeze prevention drain hose according to the fourth embodiment. FIG. 10 is a perspective view schematically showing a freeze prevention drain hose according to the fifth embodiment. FIG. 10 is a plan view schematically showing a freeze prevention drain hose according to the sixth embodiment. FIG. 10 is a cross-sectional view schematically showing a state in which a freeze prevention drain hose is inserted into a counterpart drain pipe according to an eighth embodiment. It is a conceptual diagram of the apparatus which shows an application form.

  The drain hose for freezing prevention has a core hose having a proximal end hose portion connected to the apparatus and an insertion distal end hose portion integrally provided on the front side of the proximal end hose portion. The freeze hose drain hose is preferably an electric heater provided on a core hose comprising a proximal end hose part and an insertion tip hose part, and a proximal hose part and an insertion tip so as to cover the electric heater provided on the core hose. And a cylindrical heat insulating layer covering the hose portion from the outer peripheral side. At least a part of the insertion tip hose portion of the freeze prevention drain hose is inserted into the hole of the mating drain pipe together with the electric heater and the cylindrical heat insulating layer. In this state, the other drain pipe is located on the outer peripheral side of the cylindrical heat insulating layer. The cross-sectional shape of the inner peripheral wall surface of the counterpart drain pipe is often a circular shape close to a perfect circle. In this case, the cross-sectional shape of the outer peripheral wall surface of the cylindrical heat insulating layer can be an irregular shape (non-circular shape) such as an ellipse, an ellipse, a triangle, a square, or a hexagon. By this, a space for heat insulation can be secured on the outer peripheral side of the cylindrical heat insulating layer, and even when the heat of the electric heater is large in order to prevent the drain water from freezing, it is possible to suppress deterioration due to the heat effect of the counterpart drain pipe. . In addition, an above described cross section means the cross section along a right angle direction with respect to the center axis line of a drain hose. A plurality of protrusions may be formed to form a heat insulating space on the outer peripheral wall surface of the cylindrical heat insulating layer.

  It is preferable that the amount of heat generated by the electric heater in the insertion tip hose portion is set smaller than the amount of heat generated by the electric heater in the proximal end hose portion per unit time. This is to suppress deterioration of the other drain pipe.

  In addition, as a form of use, the opening of the other drain pipe may be directly upward, may be obliquely upward (for example, inclined within a range of 20 to 70 ° with respect to the vertical line), or may be lateral. In many cases, the tip outlet of the antifreezing drain hose is moved downward (vertically or obliquely downward) or horizontally from above the opening of the counterpart drain pipe and inserted into the opening of the counterpart drain pipe.

(Embodiment 1)
Hereinafter, Embodiment 1 of the present invention will be described with reference to FIGS. 1 and 2. As shown in FIG. 1, the antifreezing drain hose 1 is connected to a device 9 and discharges the drainable drain water generated by the device 9 to the outside. The core hose 1x of the antifreezing drain hose 1 has a drain passage 1y through which drain water flows. The core hose 1x includes an upstream proximal end hose portion 10 connected to a device 9 having a housing 90 and a hose connection portion 92, and a downstream insertion distal end hose integrally provided on the front side of the proximal end hose portion 10. Part 12. The outside of the housing 9 is generally outside air than the housing 90, and may be lowered to a temperature at which freezing is likely to occur in extremely cold regions or in winter. The drain water is drainage discharged from the device 9 and is often formed by condensed water condensed in the heat exchanger of the device 9. About the core hose 1x, an inner diameter and an outer diameter may be the same over the base end hose part 10 and the insertion front end hose part 12, or they may be different. The insertion tip hose portion 12 side on the distal end side of the antifreezing drain hose 1 may be connected to the counterpart drainage pipe 4 depending on the circumstances on the user side. In this case, as shown in FIGS. 1 and 2, the insertion tip hose portion 12 has an inner portion of a hole 40 defined by the peripheral wall 43 of the counterpart drainage pipe 4 so that the peripheral wall 43 of the counterpart drainage pipe 4 is positioned on the outer peripheral side. It can be inserted into the peripheral wall 41 side. The insertion tip hose portion 12 may be substantially the same as the inner diameter (the diameter of the hole 40) of the counterpart drain pipe 4 (however, the insertion tip hose portion 12 can be inserted into the counterpart drain pipe 4). It may be small.

  As shown in FIG. 2, the antifreezing drain hose 1 is provided in the electric heater 2 provided in the proximal end hose portion 10 and the insertion distal end hose portion 12, and in the proximal end hose portion 10 and the insertion distal end hose portion 12. It has the cylindrical heat insulation layer 3 which coat | covers the base end hose part 10 and the insertion front end hose part 12 from an outer peripheral side so that the electric heater 2 may be covered. The cylindrical heat insulating layer 3 is formed of a polymer material such as resin or rubber having high heat insulating properties, and is preferably formed of a porous material such as a foam. The electric heater 2 is wound in a spiral shape around the central axis of a core hose 1x including a proximal end hose portion 10 and an insertion distal end hose portion 12. For this reason, even when the proximal end hose portion 10 and the insertion distal end hose portion 12 are bent and deformed, the electric heater 2 can cope with the bending deformation.

  The cylindrical heat insulating layer 3 covers almost the entire core hose 1x, and the cylindrical inner layer 30 that covers both the base end hose portion 10 and the insertion tip hose portion 12 from the outside, and the insertion tip hose portion 12 side. It is formed with a cylindrical outer layer 32 that covers from the outside. The outer layer 32 and the inner layer 30 may be detachable and independent from each other, or may be integrally joined. As can be understood from FIG. 2, the outer layer 32 does not cover the proximal hose portion 10. The inner layer 30 and the outer layer 32 may be formed of the same material or similar materials, or may be formed of different materials. A similar material means that the main components are the same, but the secondary components are different. In addition, as a material of the cylindrical heat insulation layer 3, although silicon rubber, chloroprene rubber, EPDM (ethylene propylene rubber), etc. are illustrated, it is not limited to this. As shown in FIG. 1, the total thickness of the inner layer 30 and the outer layer 32 is Tinsert. The thickness of the inner layer 30 that covers the proximal hose portion 10 in the tubular heat insulating layer 3 is Tbase. That is, as shown in FIG. 2, the thickness of the heat insulating layer portion (the total sum of the inner layer 30 and the outer layer 32) covering the insertion tip hose portion 12 in the tubular heat insulating layer 3 is defined as Tinsert. The thickness of the heat insulation layer part which coat | covers the proximal end hose part 10 among the cylindrical heat insulation layers 3 is set to Tbase. The thickness Tinsert is set to be thicker than the thickness Tbase (Tinsert> Tbase).

  According to the present embodiment, as shown in FIGS. 1 and 2, at least one of the insertion tip hose portions 12 on the tip 12e side so that the counterpart drain pipe 4 is located on the outer peripheral side of the freeze prevention drain hose 1. The freezing prevention drain hose 1 may be used in a state where the portion is inserted into the inner peripheral wall surface 41 side of the hole 40 of the counterpart drain pipe 4. The counterpart drain pipe 4 has an outer peripheral wall surface 4p and a shaft end surface 4e.

  The drainage property and installation property of the anti-freezing drain hose 1 are taken into consideration. In extremely cold regions, winter seasons, etc., the electric heater 2 is energized to suppress freezing of drain water flowing through the antifreezing drain hose 1. For this reason, freezing of the drain water flowing through the proximal end hose portion 10 and the insertion distal end hose portion 12 is suppressed.

  According to this embodiment, the unit area of the antifreezing drain hose 1 and the heat dissipation amount per unit time are as follows. That is, an average heat radiation amount discharged from the electric heater 2 in the insertion tip hose portion 12 to the outer peripheral side of the cylindrical heat insulating layer 3 is defined as Qinsert. Let Qbase be the average amount of heat released from the electric heater 2 in the proximal hose portion 10 to the outer peripheral side of the tubular heat insulating layer 3. At this time, according to the present embodiment, the heat radiation amount Qinsert per unit area and unit time is set to be smaller than the heat radiation amount Qbase (Qinsert <Qbase).

  When the electric heater 2 generates heat by energization as described above, the heat generated by the electric heater 2 is transferred into the drain passage 1y of the core hose 1x including the proximal end hose portion 10 and the insertion distal end hose portion 12, and the drain passage 1y. Contributes to prevention of freezing of drain water flowing inside. Furthermore, the heat generated by the electric heater 2 is also transferred to the inner peripheral wall surface 41 of the mating drain pipe 4 located on the outer peripheral side of the insertion tip hose portion 12. In general, the counterpart drain pipe 4 is often selected according to the circumstances on the user side. For this reason, the material of the other party drain pipe 4 may differ variously with a user. The counterpart drain pipe 4 may be formed of a material (for example, vinyl chloride, polyethylene, etc.) that is easily affected by heat. In such a case, the material of the mating drain pipe 4 may be altered due to the thermal effect from the electric heater 2, which is not preferable. If the deterioration progresses, there is a risk of hindering drainage drainage.

  Therefore, according to the present embodiment, as described above, the average heat radiation amount Qinsert released per unit area and unit time from the electric heater 2 in the insertion tip hose portion 12 to the outer peripheral side of the tubular heat insulating layer 3 is: It is set smaller than the average heat radiation amount Qbase released from the electric heater 2 in the proximal end hose portion 10 to the outer peripheral side of the cylindrical heat insulating layer 3 (Qinsert <Qbase). Therefore, the heat release amount Qinsert from the insertion tip hose portion 12 side per unit area and unit time is set smaller than the heat release amount Qbase from the proximal end hose portion 10 side. As a result, even if the user selects the counterpart drain pipe 4 formed of a material that is susceptible to heat while suppressing freezing of the drain water, the material of the counterpart drain pipe 4 is the electric heater 2. The possibility of alteration due to the heat effect of the heat generation is reduced.

  Furthermore, according to the antifreezing drain hose 1 according to the present embodiment, the electric heater 2 is spirally wound around the outer peripheral wall surface of the core hose 1x including the proximal end hose portion 10 and the insertion distal end hose portion 12. . Here, the electric heater 2 is wound relatively coarsely in the insertion distal end hose portion 12 relative to the proximal end hose portion 10. Regarding the spiral pitch of the electric heater 2, if the spiral pitch of the electric heater 2 in the proximal end hose portion 10 is Pbase and the spiral pitch of the electric heater 2 in the insertion tip hose portion 12 is Pinsert, the spiral pitch Pinsert is greater than the spiral pitch Pbase. Is also set longer. Examples of Pinsert / Pbase include a range of 1.1 to 4.0 and a range of 1.2 to 3.0. However, it is not limited to this.

  Thus, according to this embodiment, the average winding density of the spiral electric heater 2 is set to be relatively higher in the proximal end hose portion 10 than in the insertion distal end hose portion 12. In other words, the average winding density of the spiral electric heater 2 is set to be relatively coarser in the insertion distal end hose portion 12 than in the proximal end hose portion 10. Therefore, as described above, the average heat radiation amount Qinsert from the insertion tip hose portion 12 side per unit area and unit time is set smaller than the average heat radiation amount Qbase from the proximal end hose portion 10 side. (Qinsert <Qbase). In FIG. 2, an area where the spiral pitch of the electric heater 2 is large is shown as MA, and an area where the spiral pitch of the electric heater 2 is small is shown as MB.

  Examples are Qinsert / Qbase = 0.20-0.85, especially 0.30-0.80, 0.40-0.70. However, it is not limited to these. When Qinsert / Qbase is smaller, overheating of the inner peripheral wall surface 41 of the counterpart drain pipe 4 is suppressed. If Qinsert / Qbase is too small, the effect of suppressing freezing in the insertion tip hose portion 12 is limited. The above average is equivalent to a simple average.

  According to this embodiment, as described above, the thickness of the heat insulating layer portion that covers the insertion tip hose portion 12 in the tubular heat insulating layer 3 is Tinsert. The thickness of the heat insulation layer part which coat | covers the proximal end hose part 10 among the cylindrical heat insulation layers 3 is set to Tbase. The thickness Tinsert is set to be thicker than the thickness Tbase (Tinsert> Tbase). As a result, when the insertion tip hose part 12 is inserted on the inner peripheral wall surface 41 side of the counterpart drain pipe 4 so that the counterpart drain pipe 4 is located on the outer peripheral side, that is, on the outer circumference side of the insertion tip hose part 12. When the counterpart drain pipe 4 is positioned, the amount of heat transferred from the electric heater 2 on the insertion tip hose portion 12 side to the counterpart drain pipe 4 per unit area and unit time can be suppressed. As a result, overheating of the counterpart drain pipe 4 due to heat generation of the electric heater 2 is suppressed, and the thermal influence on the inner peripheral wall surface 41 of the counterpart drain pipe 4 can be suppressed. Eventually, alteration (deterioration deterioration) of the counterpart drainage pipe 4 due to the thermal effect resulting from the heat generation of the electric heater 2 is suppressed. In addition, the range of Tinsert / Tbase = 1.15-4.10, especially the range of 1.20-3.20, the range of 1.20-2.50 are illustrated. However, it is not limited to these. A smaller Tinsert / Tbase ratio can suppress an excessive increase in the inner diameter of the hole 40 of the counterpart drainage pipe 4.

  If the rigidity on the upstream side of the antifreezing drain hose 1 is relatively high, the flexibility of the entire antifreezing drain hose 1 may not be ensured. In this regard, according to the present embodiment, the thickness Tbase of the heat insulating layer 3 of the proximal end hose portion 10 on the side (upstream side) relatively closer to the device 9 than the insertion distal end hose portion 12 is the housing of the device 9. It is set to be thinner than the thickness Tinsert of the heat insulating layer 3 of the insertion tip hose portion 12 on the far side (downstream side) relative to 90 (Tinsert> Tbase). Therefore, the rigidity on the upstream side of the antifreezing drain hose 1 is relatively low, and the flexibility and flexibility on the upstream side of the antifreezing drain hose 1 are easily secured, thereby preventing freezing. The advantage that the flexibility of the whole drain hose 1 is easily secured is obtained. In this case, the degree of freedom of installation of the antifreezing drain hose 1 is easily secured.

  As described above, according to the present embodiment, freezing of drain water flowing through the antifreezing drain hose 1 can be suppressed by the heat generated by the electric heater 2. Even when the electric heater 2 is energized to generate heat, overheating of the mating drain pipe 4 is suppressed, and the mating drain pipe 4 is formed of a material that is easily affected by heat from the electric heater 2 (for example, vinyl chloride). Even if it is a case, the possibility that the material of the counterpart drainage pipe 4 may be altered by the heat effect from the electric heater 2 can be reduced. Therefore, even when the amount of heat generated by the electric heater 2 is increased under conditions where the environmental temperature is low and freezing is likely to occur, the risk that the material of the mating drain pipe 4 is altered by the heat from the electric heater 2 can be reduced. According to this embodiment, it can be expected that the temperature sensor for detecting the temperature of the electric heater 2 and the antifreezing drain hose 1 will be abolished, and the overheat prevention device using the temperature sensor will be abolished. .

  As can be understood from FIG. 2, by spiral winding of the electric heater 2, the outer peripheral wall 10 p of the proximal end hose portion 10, the outer peripheral wall surface 12 p of the insertion distal end hose portion 12, and the inner peripheral wall surface 3 i of the tubular heat insulating layer 3 In the meantime, a gap 35 is formed due to the influence of the thickness th of the electric heater 2. The gap 35 can be expected to function as a heat insulation gap. Since there is an influence of the density of spiral winding, it can be said that the volume of the gap 35 is larger in the outer peripheral wall surface 12p of the insertion tip hose portion 12 than in the outer peripheral wall 10p of the proximal end hose portion 10. For this reason, heat transfer from the insertion tip hose portion 12 side to the inner peripheral wall surface 41 of the mating drain pipe 4 is suppressed, and when the electric heater 2 is energized, the inner peripheral wall surface 41 of the mating drain pipe 4 is overheated and overheated. Can contribute to the suppression of alterations.

  In addition, the cross-sectional shape of the outer peripheral wall surface 32p of the cylindrical heat insulation layer 3 can be made into different shapes, such as a triangle, an ellipse, and an ellipse, as needed. Further, a plurality of protrusions may be provided on the outer peripheral wall surface 32p of the tubular heat insulating layer 3 at intervals from each other.

  In addition, as a form of use, the opening 40m of the hole 40 of the counterpart drain pipe 4 may be horizontally oriented, directly upward, or obliquely upward (for example, inclined within a range of 20 to 70 ° with respect to the vertical line). good. The outlet (tip 12e) of the anti-freezing drain hose 1 is moved horizontally or downward (vertically or obliquely downward) from above the opening 40m of the counterpart drain pipe 4 so that the hole 40 of the counterpart drain pipe 4 It is often inserted into the opening 40m. If the opening 40m is upward, it is advantageous for releasing hot air in the hole 40 of the counterpart drain pipe 4.

(Embodiment 2)
FIG. 3 shows a second embodiment. The present embodiment basically has the same configuration and the same function and effect as the first embodiment. As shown in FIG. 3, the tubular heat insulating layer 3 is formed of an inner layer 30 that covers both the proximal end hose portion 10 and the insertion tip hose portion 12, and an outer layer 32 that covers the insertion tip hose portion 12. . In order to suppress overheating on the inner peripheral wall surface 41 of the counterpart drain pipe 4, the outer layer 32 is formed of a material having a smaller heat transfer coefficient in the thickness direction than the inner layer 30. For this reason, it is possible to suppress an increase in the outer diameter DA (see FIG. 3) on the distal end side of the antifreezing drain hose 1 while improving the heat insulation on the insertion distal end hose portion 12 side. The advantage that an excessive increase in the inner diameter Dm of 40 can be suppressed is obtained.

  As can be understood from FIG. 3, the thickness of the heat insulating layer covering the insertion tip hose portion 12 is Tinsert. The thickness of the heat insulation layer part which coat | covers the proximal end hose part 10 among the cylindrical heat insulation layers 3 is set to Tbase. The thickness Tinsert is set to be thicker than the thickness Tbase (Tinsert> Tbase). In addition, the cross-sectional shape of the outer peripheral wall surface 32p of the cylindrical heat insulation layer 3 can be made into different shapes, such as a triangle, an ellipse, and an ellipse, as needed. Further, a plurality of protrusions may be provided on the outer peripheral wall surface 32p of the tubular heat insulating layer 3 at intervals from each other.

(Embodiment 3)
FIG. 4 shows a third embodiment. The present embodiment basically has the same configuration and the same function and effect as the first embodiment. As shown in FIG. 4, the thickness of the heat insulation layer part which covers the insertion tip hose part 12 among the cylindrical heat insulation layers 3 is set to Tinsert. The thickness of the heat insulation layer part which covers the insertion tip hose part 12 among the cylindrical heat insulation layers 3 is set to Tinsert. The thickness of the heat insulation layer part which coat | covers the proximal end hose part 10 among the cylindrical heat insulation layers 3 is set to Tbase. The thickness Tinsert is basically set to be the same as the thickness Tbase (Tinsert = Tbase, Tinsert≈Tbase).

  Also in this embodiment, similarly to Embodiment 1, the electric heater 2 is wound relatively coarsely in the insertion distal end hose portion 12 as compared with the proximal end hose portion 10. That is, regarding the spiral pitch P of the electric heater 2, when the spiral pitch of the electric heater 2 in the proximal end hose portion 10 is Pbase and the spiral pitch of the electric heater 2 in the insertion tip hose portion 12 is Pinsert, the spiral pitch Pbase is larger than the spiral pitch Pbase. The spiral pitch Pinsert is set to be long. That is, the electric heater 2 is wound relatively densely at the proximal end hose portion 10 relative to the insertion distal end hose portion 12. In other words, the electric heater 2 is wound relatively coarsely in the insertion distal end hose portion 12 relative to the proximal end hose portion 10. Therefore, the heat dissipation amount Qinsert from the electric heater 2 on the insertion tip hose portion 12 side is set smaller than the heat dissipation amount Qbase from the electric heater 2 on the proximal end hose portion 10 side per unit area and unit time (Qinsert). <Qbase).

  As a result, even if the user has selected a mating pipe made of a material that is easily affected by heat, the drainage of the mating drain pipe 4 is suppressed while the drain water is prevented from freezing due to the heat generated by the electric heater 2. The risk of the material being altered by the heat effect of the energization heat generation of the electric heater 2 is reduced. If necessary, the cross-sectional shape of the outer peripheral wall surface 32p of the cylindrical heat insulating layer 3 is set to the inner peripheral wall surface 41 of the counterpart drainage pipe 4 such as a triangle, a quadrangle, a pentagon, a hexagon, an ellipse, an ellipse, or the like. Can be an irregular shape. Further, a plurality of protrusions may be provided on the outer peripheral wall surface 32p of the tubular heat insulating layer 3 at intervals from each other.

  Thus, also in this embodiment, when the electric heater 2 is turned on and generates heat, the unit area passing through the outer peripheral side through the thickness of the heat insulating layer portion covering the insertion tip hose portion 12 of the tubular heat insulating layer 3 and The amount of heat transfer per unit time may be smaller than the amount of heat transfer per unit time and unit time passing through the outer peripheral side of the thickness of the heat insulating layer portion covering the proximal hose portion 10 in the tubular heat insulating layer 3. preferable.

(Embodiment 4)
FIG. 5 shows a fourth embodiment. This embodiment basically has the same configuration and the same function and effect as the first and second embodiments. As shown in FIG. 5, the cross-sectional shape of the outer peripheral wall surface 32p of the cylindrical heat insulating layer 3 covered on the outer side of the insertion tip hose portion 12 is a flattened oval shape or oval shape (non- (Circular shape, irregular shape). The major axis of the outer peripheral wall surface of the cross section on the insertion tip hose portion 12 side is denoted by D1, and the minor axis is denoted by D2. It is preferable that the inner diameter Dm of the hole 40 of the counterpart drain pipe 4 substantially matches the major diameter D1 of the insertion tip hose portion 12. In this case, it is preferable that the inner peripheral wall surface 41 of the counterpart drainage pipe 4 has a perfect circle shape or a shape similar to a perfect circle in a cross section along a direction perpendicular to the axis of the counterpart drainage pipe 4. In this case, heat insulation is provided between the inner peripheral wall surface 41 of the counterpart drain pipe 4 and the outer peripheral wall surface 32p of the cylindrical heat insulating layer 3 of the insertion tip hose portion 12 (particularly, the short diameter side of the outer peripheral wall surface 32p of the cylindrical heat insulating layer 3). A working space 44 is secured. It is possible to further contribute to the suppression of overheating of the inner peripheral wall surface 41 of the counterpart drainage pipe 4 by the heat insulating action of the heat insulating space 44 while increasing the amount of heat generated by the electric heater 2 and suppressing the freezing of the drain water. In addition, when the antifreezing drain hose 1 is installed on an installation surface such as a floor surface, the short diameter D2 of the insertion tip hose portion 12 is preferably along the height direction (arrow H direction). In this case, since the insertion tip hose portion 12 is flattened in the height direction (arrow H direction), it is suppressed from affecting the walking of the user or the maintenance person.

(Embodiment 5)
FIG. 6 shows a fifth embodiment. This embodiment basically has the same configuration and the same function and effect as the first and second embodiments. As shown in FIG. 6, the cross-sectional shape of the outer peripheral wall surface 32p of the cylindrical heat insulating layer 3 covered on the outer side of the insertion tip hose portion 12 is a triangular shape having three apex angles 3r and three sides 3s ( Non-circular shape, irregular shape). In this case, the inner peripheral wall surface 41 (inner diameter: Dm) of the hole 40 of the counterpart drain pipe 4 has a perfect circle shape or a perfect circle in a cross section along a direction perpendicular to the central axis of the counterpart drain pipe 4. It is preferable to make a shape. For this reason, the space 44 for heat insulation is securable between the inner peripheral wall surface 41 of the other party drainage pipe 4, and the outer peripheral wall surface 32p (side 3s) of the cylindrical heat insulation layer 3 of the insertion tip hose part 12. As a result, the amount of heat generated by the electric heater 2 can be increased to suppress freezing of the drain water, and can contribute to suppression of overheating of the inner peripheral wall surface 41 of the mating drain pipe 4.

(Embodiment 6)
FIG. 7 shows a sixth embodiment. This embodiment basically has the same configuration and the same function and effect as the first and second embodiments. As shown in FIG. 7, the insertion tip hose portion 12 and the tubular heat insulating layer 3 are L-shaped. In addition, the cross-sectional shape of the outer peripheral wall surface 32p of the cylindrical heat insulation layer 3 can be made into different shapes, such as a triangle, an ellipse, and an ellipse, as needed. Further, a plurality of protrusions may be provided on the outer peripheral wall surface 32p of the tubular heat insulating layer 3 at intervals from each other.

(Embodiment 7)
This embodiment basically has the same configuration and the same function and effect as the first, second, fourth, and fifth embodiments. Although not shown, the cross-sectional shape of the insertion tip hose portion is a star shape. For this reason, a space for heat insulation can be secured between the inner peripheral wall surface of the mating drain pipe and the outer peripheral wall surface of the heat insulating layer of the insertion tip hose portion, and can further contribute to the suppression of overheating of the inner circumferential wall surface of the mating drain pipe.

(Embodiment 8)
FIG. 8 shows an eighth embodiment. This embodiment basically has the same configuration and the same function and effect as the first and second embodiments. As shown in FIG. 8, a plurality of protrusions 300 protrude from the outer peripheral wall surface 32p (transverse cross section: circular shape) of the tubular heat insulating layer 3 covered on the outer side of the insertion tip hose portion 12 with a space therebetween. Has been. A plurality of protrusions 300 are formed on at least the lower surface 32 pd of the outer peripheral wall surface 32 p of the cylindrical heat insulating layer 3. By the protrusion 300, a space 44B for heat insulation can be secured between the outer peripheral wall surface 32p of the tubular heat insulating layer 3 and the inner peripheral wall surface 41 (transverse section: circular shape, inner diameter: Dm) of the hole 40 of the mating drain pipe 4. The gap width of the heat insulation space 44 </ b> B corresponds to the protrusion amount of the protrusion 300. The protrusion 300 can be formed of the same material as the cylindrical heat insulating layer 3 by integral molding, but may be formed by embedding parts.

  Depending on the application, the antifreezing drain hose 1 may be used along the lateral direction. In such a case, the lower surface 32 pd of the outer peripheral wall surface 32 p of the tubular heat insulating layer 3 of the anti-freezing drain hose 1 can easily come into contact with the lower surface 41 d of the inner peripheral wall surface 41 of the mating drain pipe 4. Due to the energization of the heater 2, the lower surface 41d is likely to be altered due to thermal influence. In this regard, according to the present embodiment, a space for heat insulation 44B can be reliably secured by the plurality of protrusions 300 between the lower surface 32pd and the lower surface 41d so as to avoid contact with the entire surface. For this reason, it is possible to contribute to the suppression of overheating of the inner peripheral wall surface 41 of the counterpart drain pipe 4 while increasing the amount of heat generated by the electric heater 2 and suppressing the freezing of the drain water. Also about other embodiment, you may form the protrusion 300 in the outer peripheral wall surface 32p of the cylindrical heat insulation layer 3. FIG. The shape of the protrusion 300 is not limited at times, and examples thereof include a cylindrical shape and a hemispherical shape. In addition, it is preferable that the protrusion 300 is formed on the entire outer peripheral wall surface 32p of the outer layer 32 of the tubular heat insulating layer 3.

(Embodiment 9)
The present embodiment basically has the same configuration and the same function and effect as the eighth embodiment (see FIG. 8) having the protrusions 300. According to this embodiment, the opening 40m of the counterpart drain pipe 4 is directly above or obliquely upward, and the outlet (tip 12e) of the anti-freezing drain hose 1 is moved downward (vertically or obliquely downward) from above. And insert it into the opening 40m of the mating drain pipe 4. Even in such a case, the plurality of protrusions 300 can prevent the entire contact between the outer peripheral wall surface 32p of the tubular heat insulating layer 3 of the antifreezing drain hose 1 and the inner peripheral wall surface 41 of the mating drain pipe 4. Demonstrate. For this reason, it is possible to contribute to the suppression of overheating of the inner peripheral wall surface 41 of the counterpart drain pipe 4 while increasing the amount of heat generated by the electric heater 2 and suppressing the freezing of the drain water.

(Application form)
FIG. 9 shows an example of the application form. The apparatus 1B includes an engine 100 driven by a gaseous or liquid fuel, a movable machine 101 such as a compressor or a generator driven by the engine 100, and high-temperature exhaust gas discharged from the engine 100 through an exhaust gas passage 120. The heat exchanger 102 to be passed through, the neutralizer 103 for neutralizing the drain water (acidic) formed by the condensed water generated in the heat exchanger 102 with an alkaline neutralizer, and the neutralizer 103 An anti-freezing drain hose 1 extending from the neutralizer 103 to the outside is provided to drain the drained water. The antifreezing drain hose 1 is formed by the antifreezing drain hose of each of the embodiments described above. The heat exchanger 102 is provided with a cooling passage 107 having a pump 106 for flowing a coolant for cooling the exhaust gas.

  (Others) The electric heater is wound in a spiral shape. However, the electric heater is not limited to this and may be of a meandering type. The cylindrical heat insulating layer 3 is formed of the inner layer 30 and the outer layer 32, but may be formed of a heat insulating layer in which both are integrated. The present invention is not limited to the embodiments described above and shown in the drawings, and can be implemented with appropriate modifications within the scope not departing from the gist.

  1 is a drain hose for freezing prevention, 1x is a core hose, 1y is a drain passage, 10 is a proximal end hose part, 12 is an insertion tip hose part, 2 is an electric heater, 3 is a cylindrical heat insulating layer, 30 is an inner layer, 32 is Outer layer, 4 is a counterpart drain pipe, 40 is a hole, 40 m is an opening, 41 is an inner peripheral wall surface, and 9 is an apparatus.

Claims (5)

An anti-freezing drain hose that is connected to a device and discharges drain water to the outside of the device while suppressing freezing of the drain water generated by the device,
The anti-freezing drain hose is
A proximal hose part connected to the device and a distal side of the proximal hose part so that at least a part thereof can be inserted into the inner peripheral wall surface side of the counterpart drain pipe so that the counterpart drain pipe is located on the outer peripheral side. The insertion tip hose part integrally connected, the electric heater provided in the base end hose part and the insertion tip hose part, and the electric heater provided in the base end hose part and the insertion tip hose part A cylindrical heat-insulating layer that covers the base end hose part and the insertion tip hose part from the outer peripheral side so as to cover
The unit area and the heat radiation amount Qinsert per unit time discharged from the electric heater in the insertion tip hose part to the outer peripheral side of the cylindrical heat insulating layer are:
Freezing characterized in that it is set to be smaller than the unit area and the heat dissipation amount Qbase per unit time discharged from the electric heater in the proximal end hose part to the outer peripheral side of the cylindrical heat insulating layer (Qinsert <Qbase). Prevention drain hose.   2. The electric heater according to claim 1, wherein the electric heater is spirally wound around the proximal end hose portion and the insertion distal end hose portion, and the electrical heater is relative to the proximal end hose portion at the insertion distal end hose portion. The anti-freezing drain hose is wound roughly coarsely and is wound more densely in the proximal end hose portion than in the insertion distal end hose portion.   In Claim 1 or 2, the unit area which passes the thickness of the heat insulation layer part which coats the insertion tip hose part among the cylindrical heat insulation layers to the outer peripheral side, and the amount of heat transfer per unit time are the cylindrical heat insulation layers. Among these, the thickness of the heat insulation layer part which coat | covers the said base end hose part is smaller than the unit area which passes to an outer peripheral side, and the amount of heat transfer per unit time, The drain hose for freeze prevention characterized by the above-mentioned.   In one of Claims 1-3, thickness Tinsert of the heat insulation layer part which coat | covers the said insertion front-end | tip hose part among the said cylindrical heat insulation layers covers the said base end hose part among the said cylindrical heat insulation layers. An anti-freezing drain hose characterized in that it is set to be thicker than the thickness Tbase of the heat insulating layer (Tinsert> Tbase).   5. The inner peripheral wall surface of the mating drain pipe according to claim 1, wherein the inner peripheral wall surface of the mating drain pipe and the outer circumferential wall surface of the cylindrical heat insulating layer of the insertion tip hose portion have different cross-sectional shapes. A freezing prevention drain hose characterized in that a space for heat insulation is ensured between the insertion end hose portion and the outer peripheral wall surface of the cylindrical heat insulating layer.

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