JP6388494B2 - Hose and manufacturing method thereof, shower head and shower hose unit - Google Patents

Description

  The present invention relates to a hot water supply hose for circulating hot water supplied from a water heater, a manufacturing method thereof, a shower head, a cartridge, and a shower hose unit.

  The temperature of the hot water supplied from the water heater changes depending on whether the water heater is turned on or off and the water pressure changes, and such a change gives an unpleasant feeling to the user. For example, when a water heater is used intermittently, a phenomenon in which cold water comes out (cold water sandwich phenomenon) occurs after hot water.

  This is because when the shower is temporarily stopped, the water accumulated in the water heater becomes too hot due to residual heat and becomes too hot, and the water in the water heater suddenly moves when it is re-heated. This is because the phenomenon of water that did not occur alternately occurs.

  When the cold water sandwich phenomenon occurs, the shower user feels a large temperature change (over 10 ° C) on the skin, which is not only unpleasant, but in the elderly, sudden contraction and expansion of blood vessels cause the heart and brain May cause acute disease.

  In order to eliminate this phenomenon, a hot water heater manufacturer has added a function called a Q function using a bypass mixing system or the like to a high-class water heater. This Q function can reduce the cold water sandwich phenomenon.

  In addition, as a quick hot water system for a shower device that can eliminate unpleasant initial cold water when using a shower according to patent literature, there is a technology for providing a hot water storage and warming part equipped with a heater and a heat insulating part on the wall surface of the bathroom retrofitted from the indoor side. It has been proposed (see Patent Document 1).

JP 2005-055154 A

  However, when the above-described Q function is provided, it is necessary to replace the hot water supply body, which is expensive. Even if the water heater is changed, the Q function does not function when the bath is chased or automatically operated, so it cannot always be used, and a time zone in which the cold water sandwich phenomenon cannot be eliminated occurs.

  On the other hand, when the system described in Patent Document 1 is provided, a new structure projects over the bathroom wall surface from the indoor side, and the place where it can be attached is also limited. Moreover, this system cannot improve the phenomenon that cold water comes out after hot water, such as the cold water sandwich phenomenon.

  The present invention has been made in view of such circumstances, and a hose capable of preventing a rapid change in the temperature of hot water that has passed through a flow path without changing a water heater, a method for manufacturing the hose, a shower head, and a cartridge An object is to provide a shower hose unit.

  (1) In order to achieve the above object, the hose of the present invention is a hot water supply hose for circulating hot water supplied from a water heater, an outer surface layer forming an exposed outer surface, and an inner surface of the outer surface layer And an inner surface layer having a function of storing heat at a first temperature.

  Thus, when hot water whose temperature has changed over the first temperature circulates in the hose, the inner surface layer is maintained at the first temperature, and heat is taken away from the hot water at the first temperature or released into the hot water. Therefore, it is possible to prevent a rapid change in the temperature of the hot water that has passed through the flow path without changing the water heater.

  (2) Moreover, the hose of the present invention is characterized in that the first temperature is designed to be outside a use temperature range and an allowable temperature range that is assumed for hot water that has passed through the flow path. . As a result, if the temperature slightly exceeding the operating temperature range is set as the first temperature, when the hot water temporarily exceeding the operating temperature range circulates through the hose, the inner surface layer takes heat from the hot water and the hot water is Try to maintain a temperature of 1. Further, when hot water having a temperature lower than the operating temperature range passes through the hose, the inner surface layer releases the stored heat and tries to maintain the hot water at the first temperature. As a result, it is possible to prevent a rapid change in the temperature of the hot water passing through the flow path.

  (3) Moreover, the hose of the present invention is characterized in that the inner surface layer has a heat storage material that changes phase at the first temperature. Thereby, the inner surface layer can be provided with a function of storing heat at the first temperature by using latent heat due to phase change.

  (4) Moreover, the hose of this invention is characterized by the surface area of the said flow path of the said inner surface layer being 3 times or more of the surface area of a simple cylindrical inner surface in case surface roughness is zero. Thereby, the thermal conductivity can be improved by increasing the surface area of the flow path, and the effect of preventing a rapid temperature change by the heat storage material can be enhanced efficiently.

  (5) Moreover, the hose of this invention is characterized by the said inner surface layer being provided with the convex part in the contact surface with hot water. The surface area of the contact surface with hot water can be increased by the convex portion.

  (6) Moreover, the hose of this invention is characterized by the said convex part being the flat fin protruded perpendicularly | vertically to the direction of the said flow path. Thereby, a surface area can be increased efficiently, maintaining the fluidity of hot water with a fin. Moreover, such a fin is easy to manufacture.

  (7) The hose of the present invention is characterized in that the inner surface layer is formed of a double network gel that holds a heat storage material. Thereby, the mechanical strength of the inner surface layer can be improved while maintaining the heat storage function.

  (8) Further, in the hose of the present invention, the inner surface layer includes two reinforcing layers formed of a double network gel, a heat storage material layer including a heat storage material between the two reinforcing layers, and the two It is characterized by having a water-insoluble film separating the reinforcing layer and the heat storage material layer. Thereby, the intensity | strength of a double network gel can be improved by isolate | separating a thermal storage material. Moreover, the outflow of the heat storage material can be prevented by the water-insoluble film.

  (9) Moreover, the shower head of this invention is a shower head connected to the hose as described in (1)-(8), distribute | circulates hot water in an inside, and discharges hot water from a sprinkling port, And a heat storage section provided on the inner surface of the head main body and having a function of contacting the hot water and storing heat at a second temperature.

  Thereby, temperature can be adjusted auxiliary with respect to the hot water which passed the hose. That is, when hot water whose temperature has changed over the second temperature circulates in the shower head, it takes heat at the second temperature or releases heat. Can be prevented.

  (10) Moreover, the shower head of this invention is characterized by the said thermal storage part having the thermal storage material which changes a phase at said 2nd temperature. Thereby, the function to store heat at 2nd temperature can be given to a thermal storage part by utilizing the latent heat by a phase change.

  (11) Moreover, the cartridge of the present invention is a cartridge that can be attached to and detached from the shower head connected to the hose described in (1) to (8), and a container part that circulates hot water inside the container part, And a heat storage unit having a function of storing heat at the second temperature when it is in contact with hot water. Thereby, by making the heat storage part of the shower head into a cartridge type, it is possible to easily change the second temperature or change the deteriorated cartridge.

  (12) Moreover, the shower hose unit of this invention is equipped with the hose as described in (1)-(8), and the shower head as described in (9) and (10) connected to the said hose. It is said. Thereby, when there is a temperature change exceeding the first temperature in the hot water from the water heater, the temperature can be adjusted by the hose, and further, the temperature can be adjusted supplementarily by the shower head for the temperature change exceeding the second temperature. As a result, the temperature adjustment function of hot water is further improved.

  (13) The manufacturing method of the present invention is a method for manufacturing a hot water supply hose that allows hot water supplied from a water heater to pass therethrough, and water, a heat storage material, and a first gelling agent are added to the container. A step of generating a first network gel, bringing both ends of the generated first network gel into contact with each other into a cylindrical shape, adding water, a heat storage material and a second gelling agent, A step of producing an inner surface layer by generating a double network gel formed by the first network gel and the second network gel, and mounting the prepared inner layer on the inner side of the prepared outer surface layer And a step of performing. A cylindrical inner surface layer formed of a double network gel holding a heat storage material can be easily produced. As a result, a hose having a temperature adjustment function and high mechanical strength can be easily manufactured.

  (14) The manufacturing method of the present invention is a method for manufacturing a hot water supply hose that allows hot water supplied from a water heater to pass therethrough, and water, a heat storage material, and a first gelling agent are added to the container. Generating a first network gel, generating a water-insoluble film on the first network gel, and further adding a heat storage material and a thickener to generate a heat storage material layer; Generating a water-insoluble film on the heat storage material layer, further adding water and a first gelling agent to generate a first network gel, thereby generating a laminate; and A step of forming an inner surface layer by forming a double-layer gel formed of the first network gel and the second network gel formed into a cylindrical shape, and an outer surface layer prepared in advance Attach the created inner layer to the inside It is characterized in that it comprises a step.

  Thereby, the cylindrical inner surface layer which laminated | stacked the thermal storage material layer containing a thermal storage material and the reinforcement | strengthening layer formed with the double network gel can be produced easily. As a result, a hose having a temperature adjustment function and a high mechanical strength can be easily manufactured.

  (15) In the manufacturing method of the present invention, in the step of attaching the inner surface layer to the outer surface layer, the manufactured inner surface layer is inserted into the outer surface layer, and the inserted inner surface layer is swollen. It is a feature. As described above, the inner surface layer can be easily attached to the outer surface layer by utilizing the swelling.

  According to the present invention, when hot water whose temperature has changed beyond the heat storage temperature circulates in the hose, the inner surface layer is maintained at the heat storage temperature, and heat is taken away from the hot water at the heat storage temperature or released to the hot water. A sudden change in the temperature of hot water passing through the flow path can be prevented without changing the machine.

(A), (b) is the perspective view which shows the hose of this invention, respectively, and sectional drawing which shows the inner surface layer. It is a perspective view which shows the conventional hose. (A), (b) It is a figure which shows transition of the water discharge temperature at the time of passing through the conventional hose and the case of passing through the hose of the present invention, respectively. (A), (b) It is a graph which shows the model and result of the simulation regarding a contact area, respectively. (A), (b) It is a graph which shows the model and the result of the simulation regarding fin height, respectively. It is sectional drawing which shows the shower head of this invention. It is a figure which shows transition of the water discharge temperature at the time of passing through the hose and shower head of this invention. It is sectional drawing which shows the shower head incorporating the cartridge of this invention. (A)-(c) It is a figure which shows the preparation methods of the hose of this invention. It is a figure which shows the preparation methods of a double network gel. (A), (b) It is a chemical formula which shows an example of the polymer chain used for the 1st and 2nd network gel, respectively. It is a figure which shows the preparation example of a 1st network gel. It is a figure which shows the preparation example of a 2nd network gel. It is a figure which shows the preparation methods of the hose of this invention.

  Next, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
(Configuration of hose)
FIGS. 1A and 1B are a perspective view showing the hose 100 and a cross-sectional view showing the inner surface layer 120, respectively. The hose 100 is a hot water supply hose and circulates hot water supplied from a water heater in an internal space. As shown in FIG. 1A, the hose 100 includes an outer surface layer 110 and an inner surface layer 120. Further, a hydrophilic treatment is performed between the outer surface layer 110 and the inner surface layer 120, and a hydrophilic treatment surface 128 is formed.

The outer surface layer 110 forms the outer surface of the hose 100 that is exposed, and is formed of a resin such as PVC or PE. The inner surface layer 120 is provided on the inner surface of the outer surface layer 110 to form a hot water flow path, and includes a heat storage material A that changes phase at a temperature T _A (first temperature). Thus, it is possible to provide the function of heat storage in the inner surface layer 120 at a temperature T _A from the hot water in contact with the inner surface by utilizing latent heat caused by the phase change of the heat storage material A.

As a result, when the hot water whose temperature has changed by more than a temperature T _A is circulated through the hose is kept inside surface layer 120 is at a temperature T _A, which releases heat to the hot water or heat away from the hot water at the temperature T _A, A sudden change in the temperature of hot water passing through the flow path can be prevented. Note that the actual heat storage temperature has a certain range, and temperatures T _A and T _B (described later) mean peak temperatures.

  In addition, as a heat storage material, disodium hydrogenphosphate dodecahydrate and iron chloride hexahydrate can be used. Moreover, what added ammonium chloride as a melting | fusing point regulator to sodium acetate trihydrate etc. may be used.

  It is preferable that the inner surface layer 120 has a surface area of the flow path that is not less than three times the surface area of a simple cylindrical inner surface when the surface roughness is zero. Thereby, the surface area of a flow path can be enlarged, a thermal conductivity can be improved, and the prevention effect of the rapid temperature change by a thermal storage material can be heightened efficiently. The surface area can be increased by roughening, for example.

  The inner surface layer 120 is provided with fins 125 on a contact surface 121 with hot water. The fins 125 are flat fins that protrude perpendicularly to the direction of the flow path, and form convex portions. Thereby, a surface area can be increased efficiently, maintaining the fluidity of hot water. Such a fin 125 can be easily manufactured as described later.

  The inner surface layer 120 is preferably formed of a double network gel that holds the heat storage material A. By making the inner surface layer 120 into a heat storage material-encapsulating high-strength gel, the mechanical strength of the inner surface layer can be improved while maintaining the heat storage function.

  FIG. 2 is a perspective view showing a conventional hose 800. As shown in FIG. 2, the hose 800 forms a layer structure in the order of an outer surface layer 810, a reinforcing layer 820, and an inner surface layer 830 from the outside to the inside. For example, the outer surface layer 810 is formed of PVC, PE or the like, the reinforcing layer 820 is formed of TPEE or the like, and the inner surface layer 830 is formed of PVC, PE or the like.

  In the hose 100, unlike the hose 800, the reinforcing layer 820 is not provided and the inner surface layer 120 is formed thick. This is to increase the contact area between the inner surface layer 120 and hot water. In addition, sufficient strength can be maintained even if the reinforcing layer is omitted by reinforcing the inner surface layer 120 itself using a double network gel. The double network gel may be wrapped with an insoluble film (calcium alginate or the like) so that the heat storage material A does not flow out.

(Hose effect)
FIG. 3A is a diagram showing a transition of the water discharge temperature _Tout when the conventional hose 800 is passed. FIG. 3A shows the history of the water discharge temperature when the hot-water tap is opened at time t1, the hot-water tap is once closed at time t2, and then the hot-water tap is opened again at time t3. Since the conventional hose 800 does not have a heat storage function, after the time t3, as shown in the region R1 in the figure, it is directly affected by the cold water sandwich phenomenon, and once the water discharge temperature rises rapidly, then suddenly Descend.

FIG. 3B is a diagram showing the transition of the water discharge temperature when passing through the hose 100. FIG. 3B is an enlarged view focused on the time when the cold water sandwich phenomenon occurs. Temperature T _A is a phase change temperature of the heat storage material A is designed to a temperature at which the temperature is and the user exceeds the operating temperature to be assumed for hot water which has passed through the flow channel slightly is acceptable also in contact . For example, the temperature _{T A} is around 44 ℃ (44 ℃ ~46 ℃) are preferred. The shower water temperature, 40.5 ° C. in hand, 42 ° C. in a wall-hanging has been said suitable temperature, because the water temperature at the time of normal use shower does not exceed the temperature T _A, the inner surface layer 120 is not heat storage, the water temperature There storing heat when it exceeds the temperature T _a.

Thus, hot water beyond the scope of the temporary use temperature by cold sandwich phenomenon when flowing through the hose 100, the inner surface layer 120 is trying to keep the hot water removes heat from the hot water to a temperature T _A. At that time, an amount of heat corresponding to the temperature difference of ΔT _SA is stored in the inner surface layer 120.

Then hot water temperature below the range of working temperature was raised by raising the temperature difference emit heat inner surface layer 120 is heat storage [Delta] T _RA is when flowing through the hose 100, to try to keep hot water at a temperature T _A. As a result, it is possible to prevent a rapid change in the temperature of the hot water passing through the flow path. In addition, the above is an example and the hose 100 can prevent the rapid change of the temperature of hot water without being limited to the cold water sandwich phenomenon.

  Note that heat storage materials having different phase change temperatures can be used for cooling hot water and heating cold water, respectively. That is, by increasing the surface area of the heat storage material on the inner wall of the hose and using the heat storage material of two types of phase change temperatures, temperature changes can be suppressed both during hot water and during cold water. As the heat storage material for heating cold water, a material having a phase change temperature lower than the hot water temperature of a shower normally used is used. Thereby, at the time of shower use, it will be in the state which accumulate | stored latent heat, heat can be discharge | released with respect to cold water as latent heat, and cold water is heated.

(Simulation of contact area and water temperature change)
The relationship between the area where the inner surface of the inner surface layer 120 is in contact with water and the water discharge temperature was determined by simulation. FIGS. 4A and 4B are graphs showing simulation models and results regarding the contact area, respectively.

In the simulation, a model as shown in FIG. 4A (inner diameter D = 10 mm, flow rate 8.5 L / min) is assumed, and the heat storage material A is considered as a heat source holding the phase change temperature, and the Dittus-Boelter equation is used. The correlation between the outlet water temperature Tout and the hose length L _H and the inner wall area was estimated. The calculation was performed for each of the case where the inlet water temperature Tin was 50 ° C and 30 ° C.

It is known that the Dittus-Boelter equation is in good agreement with the experimental data of the isothermal and isothermal flux of the wall surface when the conditions described in parentheses in Equation (1) are satisfied. The following formula (1) is a formula used for estimating the turbulent heat transfer coefficient in a circular pipe (reference: heat transfer engineering data, Japan Society of Mechanical Engineers, Maruzen (1986)).
Nu _d = 0.023Re _d ^0.8 · Pr ⁿ (10 ³ <Re _d <10 ⁷ , 0.7 <Pr <160, L _H / D> 10) (1)
Nu _d : Nusert number, Re _d : Reynolds number, Pr: Prandtl number However, when liquid is heated: n = 0.4, when liquid is cooled: n = 0.3

In the hose _{100, Re d = 2 × 10} 4, Pr = 6.85, L H / D = 200 , and the the expression of Dittus-Boelter applicable. From the Nusselt number Nu _d , the heat transfer coefficient h [W / (m ² · K)] of the inner wall of the pipe is obtained by the following formula (2).
h = Nu _d · k / D (2)
h: heat transfer coefficient [W / (m ² · K)], Nu _d : Nusselt number, k: thermal conductivity [W / (m · K)], D: inner diameter [m]

The water temperature Tout at the pipe outlet is obtained by the following mathematical formula (3).
_{Tout = T A - (T A} -Tin) / exp (h · A / (m · Cp)) ... (3)
T _A : tube wall temperature (phase change temperature) [° C.], h: heat transfer coefficient [W / (m ² · K)], A: heat transfer area [m ² ], m: mass flow rate [kg / s] , Cp: Constant pressure specific heat [J / (kg · K)]

FIG. 4B shows the results when the phase change temperature T _A = 44 ° C. is assumed and the surface area of the inner surface is changed from 1 to 4 times (S1 to S4). As a result, it can be seen that by making the heat transfer area (surface area) of the inner wall 3 times or more, hot water at 50 ° C. can be cooled to 45 ° C. or lower, which is the minimum temperature at which it feels hot in the shower.

  With the heat stored in the heat storage material when hot water flows, it is possible to heat 30 ° C. cold water flowing continuously. However, since the amount of stored heat is insufficient, it has also been found that the water temperature drops midway as shown by the temperature change C in FIG.

(Simulation of fin height and water temperature change)
As a means for increasing the heat transfer area, there is a method of providing a fin structure in the pipe. The relationship between the height of the fin provided on the inner surface of the inner surface layer 120 and the water discharge temperature was determined by simulation. FIGS. 5A and 5B are graphs showing simulation models and results regarding fin height, respectively.

In order to exchange heat while hot water travels a limited distance, the inside of the hose was assumed to have a structure with an increased heat transfer area like an inner fin tube. In this case, since the structure is provided in the pipe, the Nusselt number changes. The Nusselt number Nue was obtained by the Carnavos formula (Reference: Heat Transfer Engineering Material, Japan Society of Mechanical Engineers, Maruzen (1986)) represented by Formula (4).
^{_{Nu e = 0.212 · Re 0.6 ·}} (b / De) 0.34 · Pr 1/3 · (μ / μ W) 0.14 ... (4)
μ: Fluid viscosity [Pa · s], μ _w : Water viscosity [Pa · s]

  The effective range of Formula (4) is fin number: 6-30, fin height e: 0.05D <e <0.25D. Note that the fin spacing b was calculated by providing equal intervals in the circumferential direction. From the Nusselt number, the heat transfer coefficient and the pipe outlet water temperature can be obtained in the same manner as in the calculation example related to the contact area. FIG. 5B is a graph in which the fin width t is fixed to 1 mm and the outlet temperature at each fin height e is plotted on the horizontal axis.

  Thus, the heat transfer area was expanded by providing the fin structure on the contact surface of the inner surface layer. Since the Nusselt number also changes by providing the fin shape, the Nusselt number was calculated by the formula proposed by Carnavos, and the necessary number of fins and fin shape were determined from the relationship between the number of fins in the pipe and the temperature of the outlet water at the outlet. .

  As a result, when the outlet water temperature at the outlet is 45.5 ° C., the allowable temperature is (1) Fin height 2 mm: Fin number 10 or more, or (2) Fin height 2.5 mm: Fin number 6 or more. It was found that a fin structure satisfying the above conditions is desirable.

(shower head)
When cold water comes out following hot water, the heat stored in the heat storage material A of the inner surface layer 120 may be basically used for heating the cold water. However, if there is a lot of cold water, further measures should be taken. Also good. For example, when the same amount of cold water as hot water comes out, the amount of heat required for the heat storage amount of the inner surface layer 120 is insufficient, so it is preferable to separately arrange a heat storage material in the shower head for heating the cold water.

  FIG. 6 is a cross-sectional view showing the shower head 200. The shower head 200 is connected to the hose 100 and includes a head main body 210 and a heat storage section 220 as shown in FIG. The head main body 210 circulates hot water and discharges hot water from the water spout 215.

The heat storage unit 220 includes a heat storage material B that changes phase at a temperature T _B (second temperature), and is provided in the inner space of the head main body 210 to contact hot water. Thus, it is possible to provide the function of heat storage at a temperature T _B in the heat storage unit 220 in the latent heat of phase change.

The heat storage material B, used as the temperature T _B of the phase-change lower than the water outlet temperature at showering normally used. Thereby, it will be in the state by which the latent heat is always stored at the time of shower use, and cold water can be heated with this latent heat. Therefore, the phase change temperature of the heat storage material B is preferably about 36 ° C to 38 ° C.

FIG. 7 is a diagram showing a transition of the water discharge temperature when the hose 100 and the shower head 200 are passed. When hot water whose temperature has changed by more than the temperature T _B is circulated showerhead 200 for emitting heat or removes heat at a temperature T _B, it prevents an abrupt change in the temperature of hot water that has passed through the flow path. As a result, the temperature can be supplementarily adjusted with respect to the hot water passing through the hose 100.

In this way, the hose 100 and the shower head 200 connected to the hose 100 constitute a more effective shower hose unit. The shower hose unit, and adjust the hose when there is a temperature change in excess of the temperature T _A in hot water from the water heater can adjust the temperature in the auxiliary showerhead for temperature change and exceed the temperature T _B . Not only the cold water sandwich phenomenon but also when only cold water flows, the shower head 200 can heat the cold water.

  The shower hose and shower head are standard products, and can be removed and installed by the user as long as the hose 100 and shower head 200 are formed in dimensions and shapes that meet the standard, and no special installation work is required. It is. And the temperature change at the time of the intermittent use of a shower can be suppressed only by replacing | exchanging with the hose 100 and the shower head 200 of this invention, without providing a new structure like a hot water storage thermal insulation part in a bathroom.

(Shower head cartridge)
The shower head 200 includes the heat storage material B in the shower head 200 itself, but a cartridge may be attached to a conventional shower head. FIG. 8 is a cross-sectional view showing a shower head 900 incorporating the cartridge 300. The shower head 900 is a conventional shower head, and a water spout 915 is provided in the head main body 910.

The cartridge 300 includes a container part 310 and a heat storage part 320. The container part 310 has an outer shape suitable for the internal space of the head main body 910, and distributes hot and cold water therein. Heat storage unit 320 is composed of a heat storage material B was granulated by gelation or the like, held in the container portion, when in contact with hot water having a function of heat storage at a temperature T _B. Thus, by making the heat storage section 320 of the shower head cartridge, or change the temperature T _B, it can be easily or change degraded cartridge.

(Method of manufacturing hose)
As a preferred example of the manufacturing method of the hose 100, a manufacturing method in which the inner surface layer 120 is formed using a double network gel (high strength gel) will be described. 9A to 9C are diagrams showing a method for manufacturing the hose 100. FIG.

  As shown in FIG. 9A, water, a heat storage material A, and a gelling agent (first gelling agent) are added on the mold Mo1 provided with grooves for fin shape formation, and the first network A gel 410 is prepared. The gelling agent includes a monomer for the first network gel, a polymerization initiator, and a crosslinking material.

  Next, as shown in FIG. 9 (b), the end face of the produced first network gel 410 is brought into contact with each other to form a cylindrical shape, immersed in a monomer solution for the second network gel, and doubled by UV irradiation. A network gel 420 is made. A second network gel is formed by infiltrating the monomer for the second network gel into the network of the first network gel in contact with the end face, and cross-linking the monomer to form a double network gel. By doing so, the contact part J1 is joined. The inner surface layer 120 is made of double network gel. And as shown in FIG.9 (c), the inner surface layer 120 produced inside the outer surface layer 110 prepared beforehand is inserted in the state which reduced the amount of swelling, and it mounts | wears with the outer surface layer 110 by making it swell after that.

  As a result, the cylindrical inner surface layer 120 formed of the double network gel holding the heat storage material A can be easily produced. As a result, the hose 100 having a temperature adjustment function and high mechanical strength can be easily manufactured.

Since the flow rate of a general shower is 8.5 L / min, the amount of water for 5 seconds is 710 g. Since the amount of heat required to change the temperature by 6 ° C. is 17.9 kJ, if the heat storage material has a latent heat value of 150 J / g, the necessary amount of heat storage material is 120 g. If the density of the heat storage material is 1,000 kg / m ³ which is the same as that of water, the thickness of the heat storage material is 1 mm. The double-network gel-containing heat storage material is produced so as to have a desired size with the maximum swelling amount.

(Double network gel production method)
Next, the detail of the production method of the double network gel which hold | maintains the thermal storage material A is demonstrated. FIG. 10 is a diagram showing a method for producing a double network gel. As shown in FIG. 10, first, the heat storage material A, the first network gel monomer M1, the polymerization initiator Pi1, and the cross-linking material Ca1 are added to the water W1 and mixed. Then, the obtained solution is irradiated with ultraviolet rays to produce a first network gel SN1 on the mold. Note that the first network gel is preferably a rigid gel.

  Next, the second network gel monomer M2, the polymerization initiator Pi2, and the cross-linking material Ca2 are added to the water W2 and mixed. Then, when the first network gel SN1 is immersed in the obtained solution and taken out, and irradiated with ultraviolet rays, the double network gel DN1 holding the heat storage material A can be formed on the mold. Note that the second network gel is preferably a flexible gel.

  FIGS. 11A and 11B are chemical formulas showing examples of polymer chains used in the first and second network gels, respectively. FIG. 12 is a diagram showing a production example of the first network gel. FIG. 13 is a diagram showing a production example of the second network gel.

When preparing the first network gel, acrylamide sulfonic acid (monomer), 2-oxoglutaric acid (reaction initiator), N, N′-methylenebisacrylamide (crosslinking agent) and heat storage material A are added to water, and acetic acid is added. Add ammonium chloride as a melting point modifier for sodium trihydrate. Then, ultraviolet rays are irradiated under the conditions of hν (365 nm), rt, 1.35 W / cm ² , 4 h. As a result, an acrylamide sulfonic acid gel can be generated as the first network gel.

At the time of preparing the second network gel, acrylamide (monomer), 2-oxoglutaric acid (reaction initiator), N, N′-methylenebis, and acrylamide (crosslinking agent) are added to water. Then, ultraviolet rays are irradiated under the conditions of hν (365 nm), rt, 1.35 W / cm ² , 4 h. As a result, acrylamide can be produced as the second network gel. That is, a double network gel can be generated by infiltrating a monomer for the second network gel into the network of the first network gel and crosslinking the monomer to form the second network gel.

[Second Embodiment]
In the above example, the inner surface layer 120 is composed of a double network gel containing a heat storage material. However, the inner surface layer stores heat between two reinforcing layers formed of the double network gel and the two reinforcing layers. You may have the heat storage material layer containing a material, and the water-insoluble film | membrane which divides two reinforcement layers and a heat storage material layer. Thereby, the intensity | strength of a double network gel can be improved by isolate | separating a thermal storage material. Moreover, the outflow of the heat storage material can be prevented by the water-insoluble film.

  A method for manufacturing the hose as described above will be described. FIG. 14 is a diagram showing a method for producing a hose. First, water, a heat storage material, and a first gelling agent are added on the mold Mo1 to generate a first network gel 431. Next, a water-insoluble film 432 is generated on the first network gel, and a heat storage material and a thickener are further added to generate a heat storage material layer 433. The insoluble film can be formed of, for example, calcium alginate, and the film can prevent the heat storage material from flowing out of the gel due to a concentration gradient.

  And the water-insoluble film | membrane 434 is further produced | generated on a thermal storage material layer, Furthermore, water and a 1st gelatinizer are added, The laminated body is produced | generated by producing | generating the 1st network gel 435. The obtained layered product is formed into a cylindrical shape, and the second network gel is cross-linked by allowing the monomer for the second network gel to enter the network of the produced first network gel and crosslinking the monomer. To form a double network gel and create an inner layer. Finally, the inner surface layer produced inside the outer surface layer prepared in advance is mounted.

  Thereby, the cylindrical inner surface layer which laminated | stacked the thermal storage material layer containing a thermal storage material and the reinforcement | strengthening layer formed with the double network gel can be produced easily. As a result, a hose having a temperature adjustment function and a high mechanical strength can be easily manufactured. The step of attaching the inner surface layer to the outer surface layer is performed by inserting the inner surface layer produced in the outer surface layer and swelling the inserted inner surface layer.

DESCRIPTION OF SYMBOLS 100 Hose 110 Outer surface layer 120 Inner surface layer 121 Contact surface 125 Fin 128 Hydrophilic processing surface 200 Shower head 210 Head main body 215 Water spout 220 Heat storage part 300 Cartridge 310 Container part 320 Heat storage part 410 First network gel 420 Double network gel 431 435 First network gel 432, 434 Insoluble film 433 Thermal storage material layer Ca1, Ca2 Cross-linking material D Inner diameter DN1 Double network gel J1 Contact portion L _H hose length M1, M2 Monomer Mo1 type Pi1, Pi2 Polymerization initiator SN1 first network gel t fin width t1, t2, t3 hours phase change of _T a, _{T B} the temperature Tin inlet water temperature Tout temperature of the outlet W1, W2 water

Claims (13)

A hot water supply hose for circulating hot water supplied from a water heater,
An outer surface layer forming an exposed outer surface;
An inner surface layer provided on the inner surface of the outer surface layer to form a hot water flow path and having a function of storing heat at a first temperature ;
It said inner surface layer is a hose which is characterized that you have been formed by a double network gel that holds the heat storage material. A hot water supply hose for circulating hot water supplied from a water heater,
An outer surface layer forming an exposed outer surface;
An inner surface layer provided on the inner surface of the outer surface layer to form a hot water flow path and having a function of storing heat at a first temperature ;
The inner surface layer includes two reinforcing layers formed of a double network gel, a heat storage material layer including a heat storage material between the two reinforcement layers, and water separating the two reinforcement layers and the heat storage material layer. hose according to claim Rukoto that Yusuke and film insoluble, the. 3. The hose according to claim 1, wherein the first temperature is designed to be outside a use temperature range and an allowable temperature range assumed for the hot water passing through the flow path. The hose according to any one of claims 1 to 3 , wherein the inner surface layer has a heat storage material that changes phase at the first temperature. Said inner surface layer is described in the surface area of the flow path, any one of claims 1 to 4, characterized in that at least three times the surface area of the inner surface of a simple cylindrical shape in the case of the surface roughness zero Hose. The hose according to any one of claims 1 to 5 , wherein the inner surface layer has a convex portion on a contact surface with hot water. The hose according to claim 6 , wherein the convex portion is a flat fin that protrudes perpendicularly to the direction of the flow path. A shower head connected to the hose according to claim 1 or we claim 7,
A head body that circulates hot water inside and discharges hot water from the water spout,
A shower head, comprising: a heat storage section provided on an inner surface of the head main body and having a function of contacting heat with hot water and storing heat at a second temperature. The shower head according to claim 8 , wherein the heat storage unit includes a heat storage material that changes phase at the second temperature. The hose according to any one of claims 1 to 7 ,
A shower hose unit comprising: a shower head connected to the hose. A method of manufacturing a hot water supply hose that passes hot water supplied from a water heater,
Adding water, a heat storage material, and a first gelling agent in a container to produce a first network gel;
Both ends of the generated first network gel are brought into contact with each other to form a cylinder, and water and a second gelling agent are added to form the first network gel and the second network gel. Producing a double network gel to produce an inner surface layer;
Mounting the prepared inner surface layer on the inner surface of the outer surface layer prepared in advance. A method of manufacturing a hot water supply hose that passes hot water supplied from a water heater,
Adding water and a first gelling agent in a container to produce a first network gel;
Generating a water-insoluble film on the first network gel, and further adding a heat storage material and a thickener to generate a heat storage material layer;
Generating a water-insoluble film on the heat storage material layer, further adding water, the first gelling agent, and generating the first network gel, thereby generating a laminate; and
Making the laminate into a cylindrical shape, producing a double network gel formed by the produced first network gel and second network gel, and producing an inner surface layer;
Mounting the prepared inner surface layer on the inner surface of the outer surface layer prepared in advance. Wherein in the step of mounting the inner surface layer on an outer surface layer, and inserting the fabricated inner surface layer on the outer surface layer, as claimed in claim 11 or claim 12, wherein the swelling said inserted inner surface layer Production method.

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