AU2011211830A1

AU2011211830A1 - Simultaneous drinking water/hot water recovery-type solar water-heating device

Info

Publication number: AU2011211830A1
Application number: AU2011211830A
Authority: AU
Inventors: Seishi Higashi
Original assignee: AZUMA SOLAR CO Ltd
Current assignee: AZUMA SOLAR Co Ltd
Priority date: 2011-02-01
Filing date: 2011-02-01
Publication date: 2012-08-16
Anticipated expiration: 2031-02-01
Also published as: AU2011211830B2; CN102326033B; DE112011100000B4; CN102326033A; MY162084A; KR101222451B1; WO2011096376A1; DE112011100000T5; HK1166364A1; KR20120089562A

Abstract

(19)~~~(0 0 0,Pi- 41fkR (4 3) M % 1 l(1)M I6 N 2011 * 8 Al 11 H (11.08.2011) PCT W O 2011/096376 Al (51) M W 4 3-F0: CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, Fl, F24J2/04 (2006.01) F24J2/42 (2006.01) GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, (21) M 19 W: PCT/JP2011/051976 LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, (22) M W RE6E: 2011 Pl 2 J 1 8 (01.02.2011) MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PE, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, ST, (25) M W R)11: 8 Mi6 SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, (26) 3 ® : 6 6 VC, VN, ZA, ZM, ZW. (71) < C )X (*z KD LZ -IC-CV): 7 (84) 0) ( t®tL3 U) ±r ) i®Zt) { X27 '2- 5- $ E t (AZUMA SOLAR CO., 5- fi i3 RB): ARIPO (BW, GH, GM, KE, LR, LS, MW, LTD.) [JP/JP]; T 8618001 l tt MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW), .-L - -7 $ 7 A T H 1 # 4 4 F Kumamoto (JP). (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM), E - - / / \ (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, Fl, FR, (72) 5BE ;tiJeZ$ GB, GR, HR, HU, IW, IS, IT, LT, LU, LV, MC, MK, MT, (75) 5B Z- ( 2L \ C 0 ' ): -!!JEiZ(HI- NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI GASHI Seishi) [JP/JP]; T 8618001 * I *$TA (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, j HA-fT H 1 # 4 4 7 7X-7' - 5-$$ NE, SN, TD, TG). -i±r Kumamoto (JP). (74) It IT A\: j, 4A M , 3r (ANAMI Kensaku et al.); T - -.l' ' (* fia 921 *(3)) 8600041 $149 _T Rlii T 4 T H 3 0 # 1 Ar =IST t)L 7 M Kumamoto (JP). = Rt c) R) )h)T L E IT L t:- W Iz Itl 4 O N ;! tt 7 . (R P11I (81) t I5( ®td2\5Y. ± t ®f ltj{I 48.2(h)) -Pi 4fl): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, CA, CH, CL, CN, CO, (54) Title: SIMULTANEOUS DRINKING WATER/HOT WATER RECOVERY-TYPE SOLAR WATER-HEATING DEVICE = (54) " $ 7X, (57) Abstract: Disclosed is a simultaneous drinking wa ter/hot water recovery-type solar water-heating device 56 which can simultaneously provide a supply of hot water and drinking water by enabling the acquisition of hot wa 58 ter using solar heat, and the acquisition of drinking water using the hot water generation process. The disclosed so 4 lar water-heating device is provided with: a solar heat col 28a lector panel (2); an evaporation tank (3) which is provid 28 ed in a position higher than, and near to, the solar heat collector panel (2), is communicably connected to the so 22 lar heat collector panel (2), and has a space where the hot 32 20 water heated by the solar heat collector panel (2) is re 42 ceived and evaporated; a hot water storage tank (4) which R f 30 is provided in a position higher than, and near to, the 20a evaporation tank (3), and the water stored in which is 52 heated by the evaporated hot water in the evaporation 3 tank (3) by heat exchange; and an outlet (5) which is pro 25 - vided in the evaporation tank (3) and from which the condensate of the evaporated hot water from the heat ex 26(21) change with the water in the hot water storage tank (4) di rectly flows out as distilled water. A heat exchange unit is provided between a first and second circulation system 40 2 (M, N) and the condensate directly flows out as distilled water using the heat exchange unit. (57) W O 20 11/096376 A 1l II ||I ||VIIIlllII|I||||||I |||||I|DI|I||||I||||||I||||||I|I|||||||||||I| - E ® A 534 * IZ X < ;4 2 1 *(2)(a)i Z J7)lA r ~ ettt At r~ U) 4 U Ac BIct: ;*eM L -T La/ L nXME a/ xieW L, in tI: ZfZ 7X e - J]R I l:gR f L 5 4R X -R[1 Wmit=> Af S*)L (2) t, t;Mfl /S *YL' (2) 1 z) fa®ilitifam Stt8*1MAM/U*)A (2) Ac t#Ef StLCI-t AM * A- (2) T1hoent5AcX &L~ t~t4 (3) t, M (3) L) {O4 iliifa ir22 #489 7X /M M( 3) WO Mft 7X L *R 3Z A ;L t -C-*7X R: L ;! tL 7 T (4) 2,MM(3) lisiktt EAjXRT (4) 07XLD3fJ _ jM~ : & t I /OR, MA & MW 7X C Tiiz9R L) )t)I] (5) ,4j@i, 21,22MNWl (M, N) ®*MTrA3 8R teC TP A Z fC f I&7X L L -T gR ')

Description

Description SOLAR WATER HEATING DEVICE FOR SIMULTANEOUSLY COLLECTING DRINKING WATER/HOT WATER Technical Field [0001] The present invention relates to a solar water heating device, and more particularly to a solar water heating device for simultaneously collecting drinking water/hot water capable of extracting hot water for hot water supply by means of solar heat energy and simultaneously extracting and using the drinking water. Background Art [0002] A hot water supply system utilizing the solar heat in which a device is installed on a roof of a residential building, water in a heat collection unit is heated by the solar heat, hot water is accumulated in a hot water reservoir unit by means of the thermosyphon effect based on a difference in temperature from the hot water reservoir unit, and the hot water is supplied to a bath and the like by means of piping is conventionally known, for example. On the other hand, environmental problems including global warming due to CO 2 , ozone layer depletion by fluorocarbon, airpollution, acid rain, ground water pollution, pollution of sea, rivers, and lakes and marshes, deforestation, desertification, sharp decrease in biological species, waste disposal, soil pollution, and environmental hormone have recently become more serious, and have become urgent problems to be addressed worldwide. One of principle causes of these environmental problems is global warming due to CO 2 emission, and thus, solar photoelectric generation which employs solar cells for directly extracting electric power from sunlight has recently been gaining attention, and its employment has been encouraged along with fitting of the electric-power-selling system in each household. However, this solar photoelectric generation has such a problem that the energy density per 1 m 3 is low (approximately 1 kW) and the energy conversion efficiency is poor, and efficiency largely decreases particularly when hot 11 water is obtained by heating water. Considering this point, since the hot water supply system utilizing the solar heat for heating liquid such as water directly converts water to hot water using the solar heat energy, it is considered as a method to be actively used in the future in terms of high conversion efficiency, low cost, and high degree of freedom in scale selection, as well as no CO 2 emission. [0003] Conventionally, there is a device disclosed in a patent document 1 devised by the applicant as the hot water supply system utilizing the solar heat. Citation list Patent Document (0004] Patent document 1: Japanese Patent Application No. H06-159815 Summary of the Invention Problems to be Solved by the Invention [0005] A system according to the patent document 1 forms first and second convection circulation circuits using a header tank and a heat accumulation tank, and using a heat collection unit and the header tank, respectively. The heat collection unit is connected to a switching connection unit which is switched to either the first or second convection circulation circuit, and reduces a water supply period, thereby always supplying constant hot water. The system according to the patent document 1 is excellent in that hot water at a high temperature is supplied by the header tank to the heat accumulation tank side even if hot water in the heat accumulation tank decreases, thereby saving the water supply period, and providing a hot water supply in a short period. On the other hand, there is a demand for a multi-function product formed by adding new functions to the hot water supply system utilizing the solar heat. [0006] The present invention is devised in view of the foregoing conventional problems, and one of objects thereof is to provide a solar water heating device for simultaneously collecting drinking water/hot water which generates hot water 2 utilizing the solar heat, thereby obtaining hot water to be used for various purposes, and which is capable of acquiring drinking water in the process of the hot water generation for simultaneously obtaining the hot water supply and drinking water. Means for Solving the Problems [0007] In order to solve the above problems, the present invention is a solar water heating device for simultaneously collecting drinking water/hot water 1 comprising a solar heat collection panel 2, an evaporation tank 3 disposed at a position higher than and close to the solar heat collection panel 2, which communicates with and connects to the solar heat collection panel and has a space for receiving and evaporating hot. water heated by the solar heat collection panel, a hot water reservoir tank 4 disposed at a position higher than and close to the evaporation tank 3 in which stored water becomes hot water by exchanging heat with the evaporated hot water of the evaporation tank, and the hot water is collected externally, and an extraction opening 5 provided on the evaporation tank 3 in which condensed liquid of the evaporated hot water as a result of the heat exchange with the water in the hot water reservoir tank 4 is directly extracted as distilled water Q, and is externally collected as drinking water. The solar heat collection panel 2, the evaporation tank 3, and the hot water reservoir tank 4 are disposed in ascending order of height, and the hot water circulates by natural convection through a flow passage. Though a drive device such as a pump may be used for conduction of the water according to necessity, the conduction can be obtained basically by natural convection. The solar water heating device for simultaneously collecting drinking water/hot water according to the present invention is composed of integrally assembling the solar heat collection panel 2, the evaporation tank 3, and the hot water reservoir 4, but two, three, or more sets of this device 1 may be installed in parallel, and may be connected at outlets for the hot water supply or the distilled water, thereby supplying a required volume of hot 3 water. Moreover, this device may be installed and used on a roof of a general residential building and other building as well as on a tilted stand separately installed in a tilted arrangement. [0008] On this occasion, the evaporation tank 3 preferably includes an evaporation chamber 20 that forms, along with the solar heat collection panel 2, a circulation system for the hot water to be heated by the solar heat collection panel 2, and a hot water support means 21 disposed in the evaporation chamber 20 that supports the hot water to be heated in a state in which the hot water is directly in contact with a space 20a inside the evaporation chamber 20. As long as the support is in a form that prevents the hot water from mixing with the distilled water when the hot water from the solar heat collection panel evaporates and the condensed water is collected as the distilled water, a specific water support configuration is not limited. The hot water is supported by the hot water support means in a state in which the hot water from the solar heat collection panel can freely conduct. [0009] The evaporation tank 3 preferably includes integrally a circulation communication chamber portion 28 partitioned from and disposed adjacent to the evaporation chamber 20 that communicates with the hot water reservoir tank 4 for circulating a liquid in the hot water reservoir tank, and includes an evaporation/condensation wall 34 for the heat exchange between the hot water from the solar heat collection panel 2 and the liquid in the hot water reservoir tank 4. The evaporation tank 3 forms different circulation systems with the solar heat collection panel 2 and with the hot water reservoir tank 4, respectively, and simultaneously functions as a part of both systems. In other words, the evaporation tank 3 is disposed between the solar heat collection panel 2 and the hot water reservoir tank 4, supplies the water in the second circulation system with heat by a phase change from the gas phase to the liquid phase of the hot water generated in the first circulation system, and collects the distilled water condensed 4 and liquefied upon the phase change. A part of the hot water reservoir tank is formed integrally with the evaporation tank as the circulation communication chamber portion for facilitating the heat exchange action between the vapor of the hot water and the water in the hot water reservoir tank side, increasing heat exchange efficiency, promoting manufacturing, and maintaining strength. However, the entire evaporation tank may be disposed in a state in which it is stored in the hot water reservoir tank. [0010] The evaporation/condensation wall 34 preferably includes a wall having an arc or a circular cross section. [0011] The evaporation tank 3 preferably includes a double-tube structure where the evaporation chamber 20 and the circulation communication chamber portion 28 are integrally formed by inner/outer double tubes. [0012] The hot water support means 21 preferably includes a container body 26 disposed in the evaporation chamber 20 in a state in which it communicates with and connects to an outlet 12 and an inlet 10 for the hot water in the solar heat collection panel 2, and has an opening 25 at a top surface for receiving the hot water. (0013] The solar water heating device for simultaneously collecting drinking water/hot water preferably comprises a first circulation system M that includes a hot water circuit by means of a difference in height between the solar heat collection panel 2 and the evaporation tank 3, and a second circulation system N that includes a hot water circuit by means of a difference in height between the evaporation tank 3 and the hot water reservoir 4, which reduces the size of the solar water heating device by arranging the solar heat collection panel 2 and the evaporation tank 4 on both sides of the evaporation tank 3. [0014] The solar water heating device for simultaneously collecting drinking water/hot water may include a constant-water-level water supply mechanism 60 that maintains a constant liquid surface level in the hot water support means 5 21 of the evaporation tank 3. Effects of the Invention [0015] Since the solar water heating device for simultaneously collecting drinking water/hot water according to the present invention comprises the solar heat collection panel, the evaporation tank disposed at a position higher than and close to the solar heat collection panel, which communicates with and connects to the solar heat collection panel and has the space for receiving and evaporating hot water heated by the solar heat collection panel, the hot water reservoir tank disposed at a position higher than and close to the evaporation tank, in which stored water becomes hot water by exchanging heat with the evaporated hot water of the evaporation tank, and an extraction opening provided on the evaporation tank in which condensed liquid of the evaporated hot water as a result of the heat exchange with the water in the hot water reservoir tank is directly extracted as distilled water, the solar water heating device for simultaneously collecting drinking water/hot water is capable of acquiring the high-quality drinking water along with the hot water using the solar heat by installing it on a roof of general residential building and other building in a compact structure, which is easy to maintenance without the need of a drive device, with low manufacturing, maintenance and management costs. Moreover, the solar water heating device for simultaneously collecting drinking water/hot water generates the hot water for hot water supply directly from the solar heat by the high energy conversion efficiency, and is capable of simultaneously collecting the high quality drinking water without emitting any CO, which is expected to be efficiently used as an environment-compliant device such as one for preventing global warming in Japan as well as overseas. [0016] Since the evaporation tank includes the evaporation chamber that forms, along with the solar heat collection panel, the circulation system for the hot water to be heated by the solar heat collection panel, and the hot water 6 support means disposed in the evaporation chamber that supports the hot water to be heated in a state in which the hot water is directly in contact with the space inside the evaporation chamber, it is possible to prevent the hot water from mixing with the distilled water when the hot water from the solar heat collection panel is evaporated and the condensed water is collected as the distilled water, thereby efficiently collecting the distilled water upon the heat exchange with the water on the hot water reservoir tank side. [0017] Since the evaporation tank integrally includes the circulation communication chamber portion partitioned from and disposed adjacent to the evaporation chamber that communicates with the hot water reservoir tank for circulating a liquid in the hot water reservoir tank, and includes the evaporation/condensation wall for the heat exchange between the hot water from the solar heat collection panel and the liquid in the hot water reservoir tank, the heat exchange action between the vapor of the hot water of the solar heat collection panel and the water of the hot water reservoir tank is efficiently carried out, the connection structure between the hot water reservoir tank and the evaporation tank for causing the heat exchange action with the water in the hot water reservoir tank is configured as a structure for promoting simple manufacturing, and the part of the hot water reservoir tank is further integrated into the evaporation tank as the circulation communication chamber portion, thereby securing structural strength of the evaporation tank. [0018] Since the evaporation/condensation wall includes an arc wall or a circular wall, the vapor of the hot water is evenly attached on the evaporation/condensation wall, thereby efficiently generating condensed distilled water, and the circular wall concretely realizes the double-tube configuration constructed by the inner/outer double tubes, thereby efficiently carrying out the heat exchange action, so that the connection structure between the hot water reservoir tank and the evaporation tank is configured for promoting simple 7 manufacturing, and the structural strength of the evaporation tank can be secured. [0019] Since the evaporation tank includes the double-tube structure where the evaporation chamber and the circulation communication chamber portion are integrally formed by the inner/outer double tubes, the heat exchange action can be efficiently carried out, the connection structure between the hot water reservoir tank and the evaporation tank is configured for promoting simple manufacturing, and the structural strength of the evaporation tank can be secured. [0020] Since the hot water support means includes the container body disposed in the evaporation chamber in a state in which it communicates with and connects to the outlet and the inlet for the hot water in the solar heat collection panel and has the opening at the top surface for receiving the hot water, it is possible to provide the structure which prevents the hot water from mixing with the distilled water when the hot water from the solar heat collection panel is evaporated and the condensed water is collected as the distilled water, and it is further possible to concretely realize the structure which efficiently collects the distilled water upon the heat exchange with the water on the hot water reservoir tank side. [0021] Since the solar water heating device for simultaneously collecting drinking water/hot water preferably comprises the first circulation system that includes the hot water circuit by means of a difference in height between the solar heat collection panel and the evaporation tank, and the second circulation system that includes the hot water circulation by means of a difference in height between the evaporation tank and the hot water reservoir, a compact structure which arranges the solar heat collection panel and the evaporation tank on both sides of the evaporation tank contributes to a weight reduction. [00221 Since the solar water heating device for simultaneously collecting drinking water/hot water includes the constant-water-level water supply mechanism that maintains 8 a constant liquid surface level of the hot water support means of the evaporation tank, the distilled water is stably secured. Brief Description of the Drawings [0023] FIG. 1 is an enlarged longitudinal cross sectional view of a principal part of a solar water heating device for simultaneously collecting drinking water/hot water according to a first embodiment of the present invention. FIG. 2 is an explanatory front view with partial longitudinal cross sections of the device in FIG. 1 viewed from the front side while a hot water reservoir tank and an evaporation tank are respectively cut longitudinally in the vertical direction with omission of a heat insulating material. FIG. 3 is an enlarged longitudinal cross sectional schematic view of a principal part of the solar water heating device for simultaneously collecting drinking water/hot water according to another embodiment of the present invention. Fig. 4 is an explanatory view of supply and circulation systems for water and hot water of the device in FIG. 1. FIG. 5 is an explanatory view showing a form of using the hot water and distilled water when the device in FIG. 1 is installed on a roof surface of a residential building. FIG. 6 is a table showing times and actual measured temperatures at respective principal parts according to an example. FIG. 7 is a diagram showing the actual measured values in FIG. 6 represented in a chart form. FIG. 8(a) is a schematic configuration diagram of a device showing temperature detection positions of the example in FIG. 6, and (b) is another schematic configuration diagram of a device showing the temperature detection positions of the example in FIG. 6. Best Modes for Carrying out the Invention [0024] A detailed description will now be given of embodiments of a solar water heating device for simultaneously collecting drinking water/hot water according to the present invention by referring to accompanying drawings. FIGS. 1 to 4 show the solar water heating device for simultaneously 9 collecting drinking water/hot water according to the embodiments of the present invention. The solar water heating device for simultaneously collecting drinking water/hot water according to the present invention generates hot water by means of natural convection by providing a difference in height among respective main components and simultaneously collects distilled water, and is installed on a roof of a building, an arbitrary stand in a tilted arrangement, or the like, for example. [0025] In FIG. 4, the solar water heating device for simultaneously collecting drinking water/hot water 1 according to this embodiment is installed on a roof of a general residential building in a tilted arrangement by an arbitrary fixation method, for example. The solar water heating device for simultaneously collecting drinking water/hot water 1 (referred to as "simultaneous collection hot water device" hereinafter) according to the embodiment in FIGS. 1, 2 includes a solar heat collection panel 2, an evaporation tank 3 which communicates with and connects to the solar heat collection panel 2 and disposed at a position higher than and close to the solar heat collection panel 2, a hot water reservoir tank 4 which stores liquid (water) which becomes hot water by exchanging heat with hot water in the evaporation tank, and a distilled water extraction opening 5 provided on the evaporation tank. Though these components are formed using stainless steel plates or steel plates, any material may be used as long as the application does not pose problems in strength, durability, influence on the human body, and the like. [0026] The solar heat collection panel 2 is installed on a roof surface Rf at a roof slope, and is further installed on the roof surface in a tilted arrangement in a state in which the evaporation tank 3, and the hot water reservoir tank 4 are integrally assembled. [0027] In FIG. 1 and 2, the solar heat collection panel 2 is a heating means for liquid which heats liquid such as water supplied from the outside using the solar heat, and feeds the 10 heated liquid to the evaporation tank 3 by means of natural convection, and is a panel formed by integrally joining two heat collection panels which are stainless steel plates or are made of polyethylene, and inside of which a (hot) water-conveyance recessed portion is continuously formed as a water-conveyance channel 6 according to this embodiment. The supplied water is heated while conducting through the water conveyance channel 6 which efficiently collects the solar heat and is distributed and provided over the entire panel surface formed by the opposing water-conveyance recessed portions. An inlet port 10 and an outlet port 12 which communicate with and are connected to the evaporation tank 3 described later are attached to separated positions on a top edge on the solar heat collection panel 2, and water or hot water in the solar heat collection panel circulates by convection via pipes 14, 16 through the inside of the evaporation tank 3. An inlet which conducts the hot water from the solar heat collection panel 2 toward the evaporation tank 3 is designated as the inlet port 10, and an outlet which returns the hot water from the evaporation tank 3 toward the solar heat collection panel 2 is designated as the outlet port 12. [0028] The evaporation tank 3 is a phase-changing means which, along with the solar heat collection panel 2 forms a first circulation system M, receives the hot water heated by the solar heat collection panel 2 to exchange heat with the liquid on the hot water reservoir tank 4 side when evaporating the hot water in an evaporation space 20a of an evaporation chamber 20 thereby condensing the hot water and collecting the condensed liquid as distilled water. According to this embodiment, the evaporation tank 3 includes the evaporation chamber 20 which forms the circulation system M of the hot water to be heated by the solar heat collection panel 2, and the hot water support means 21 provided in the evaporation chamber 20, that supports the hot water to be heated in a state in which the hot water is directly in contact with the space 20a in the evaporation chamber 20. The evaporation tank 3 is formed by a cylindrical 11 drum connected to the solar heat collection panel 2 at a position higher than the solar heat collection panel 2, and is disposed on the roof surface Rf on a tilted extension of the solar heat collection panel 2 according to this embodiment. Further, the evaporation tank 3 is formed by a double-tube structure which includes an inner tube 22 and an outer tube 24. The inner tube 22 and the outer tube 24 are disposed at concentric positions, and both tubes are arranged at a predetermined interval, thereby forming a gap. [0029] In FIG. 1, a container body 26, which has an opening 25 on the top surface, is mounted and is supported by arbitrary support means protruded from a body wall of the container body like a frame, for example, at a midair intermediate position separated from a bottom portion of the evaporation tank 3 so as not to be in contact with the bottom portion of the evaporation tank 3 in the inner tube 22 of the evaporation tank 3. The container body 26 is the hot water support means 21 which supports the heated hot water from the solar heat collection panel 2 in a state in which the hot water is directly in contact with the air in the space 20a of the evaporation chamber, and releases the hot water from a closed space of the solar heat collection panel 2 into the evaporation chamber. Inotherwords, the container body 26 is a receiving means for the hot water which includes a bottom portion and a peripheral side portion, and supports the hot water which flows in from the inlet port 10 of the solar heat collection panel via the pipe 14 in a circulating and conducting state. The top surface of the container body 26 may be partially opened or entirely opened. Though the material of the container body 26 is stainless steel according to the embodiment, metal, synthetic resin, or other material which is not toxic to the human body may be used. Moreover, though the container body 26 is formed by a half cylindrical shape according to the embodiment, the three-dimensional shape thereof is not specifically limited. In FIG. 2, a left end side of the half cylindrical container body and a left end side of the solar heat collection panel 2 12 communicate and connect with each other via the pipe 14, and a right end side of the half cylindrical container body and a right end side of the solar heat collection panel 2 communicate and connect with each other via the pipe 16. The pipe 14 on the inlet port 10 side is set to a higher position than a connection position of the pipe 16 of the outlet port 12 to the container body 26, and the hot water conducts through the container body 26 from the inlet port connection side to the outlet port connection side by the natural convection. The temperature of the hot water inside the container 26 rise to approximately 800C, for example, and evaporated vapor p diffuses from the opening 25 into the evaporation chamber 20. [0030] A hot water reservoir tank 41 of a size which can store the entire evaporation tank while a sufficient reservoir space S is formed in an outside portion of the evaporation tank 3 may be constructed, and the evaporation tank 3 may be arranged so as to be stored in the hot water reservoir tank 41 as shown in FIG. 3 in principle (second embodiment). [0031] According to this embodiment, the evaporation tank 3 is constructed by means of integral assembly as the double cylindrical structure including the inner tube 22 and the outer tube 24, and a circulation communication portion 28 which communicates with the hot water reservoir tank 4 is formed in the gap between the inner and outer tubes, as shown in FIG. 1. A circulation communication chamber 28a of the circulation communication portion 28 communicates with the inside of the hot water reservoir tank 41 by pipes 30, 32. The pipe 30 connects to a lower portion of the hot reservoir tank 4 and a lower portion of the circulation communication chamber portion 28, thereby allowing them to communicate with each other, and the pipe 32 connects to higher portions thereof, thereby allowing them to communicate with each other. The circulation communication chamber portion 28 is partitioned from the evaporation chamber 20 of the evaporation tank 3 by an evaporation/condensation wall 34 of the inner tube 22, and, on the other hand, communicates with the hot water reservoir tank 13 4 so that the water in the hot water reservoir tank 4 circulates by convection to and from this circulation communication chamber portion 28. The inner wall of the evaporation/condensation wall 34 (inner wall of the inner tube 22) is also an outer enclosure wall of the evaporation chamber 20, and the water which has become hot water as a result of the heat exchange between the low temperature water in the circulation communication chamber portion 28 and the vapor p in the evaporation chamber conducts into the hot water reservoir tank 4 by the convection circulation, thereby causing the entire water in the hot water reservoir tank 4 to become hot water. [0032] The evaporation/condensation wall 34 is formed by an arc or circular wall, and can be constructed as a structure which increases the heat exchange efficiency by promoting the vapor p to evenly contact the wall surface, and which provides strength as the cylindrical structure and a structure including the arcs. [0033] In contrast to the type which stores the evaporation tank 3 in the hot water reservoir tank 41 as shown in FIG. 3, the embodiment in FIG. 1 is simple to manufacture and assemble as the evaporation tank 3 independent of the hot water reservoir tank 4, and can increase freedom of connectivity for additional mechanisms such as a mechanism which directly supplies the circulation communication chamber portion 28 with water from outside independently of the communication route to the hot water reservoir tank 4, thereby always maintaining a large difference in temperature from the vapor in the evaporation chamber 20 and providing desired condensed distilled water. [0034] On the other hand, an extraction opening 5 for the distilled water is opened close to a bottom wall of the inner tube 22, and a tube 38 is connected to the extraction opening 5, thereby permitting the extraction of the distilled water Q to the outside via an open/close valve 40. A mineral water generator 39 formed by a cartridge containing mineral powders and the like which elutes minerals is interposed in the course of the pipe 38 in the embodiment, thereby water can be used as 14 the drinking water. It should be noted that reference numeral 42 denotes a heat insulating body adhered over the outer surface of the outer tube, and is constructed by a heat insulating material such as a foam resin adhered over the outer surface of the outer tube 24 according to the embodiment. [0035] The hot water reservoir tank 4 is a hot water reserving means which, along with the evaporation tank 3, forms a second circulation system N, for reserving water which has become hot water by the heat exchange with the vapor in the evaporation chamber 20, and the hot water reservoir tank 4 is formed by a cylindrical drum connected to the evaporation tank 3 via the pipe 44 at the position higher than the evaporation tank 3, and is disposed on the tilted extension thereof on the roof surface Rf according to the embodiment. The hot water reservation tank 4 includes a reservoir chamber 50 having a capacity volume of approximately 80 liters with respect to a capacity of approximately 30 liters, for example, of the evaporation tank 3, and the hot water Lw the temperature of which is increased as the solar radiation of the sun and the temperature increase can be extracted via a hot water extraction pipe 52. A constant quantity supply device 56 for the water Lc provided with a ball tap mechanism 54 or the like is connected to the hot water reservoir tank 4 as shown in FIG. 2, supplies the water in a nominal capacity of 80 liters, for example, and then automatically stops the supply. It should be noted that reference numeral 58 denotes a heat insulating material such as a foam resin adhered on an outer periphery of a tank body of the hot water reservoir tank 4. [0036] A constant-water-level water supply mechanism 60 which maintains a constant liquid surface level in the container body 26 serving as the hot water support means 21 of the evaporation tank is provided in FIGS. 2 and 5. The constant-water-level water supply mechanism 60 includes a water holding tank 62, a pipe 64 which communicates with the water holding tank with one end and communicates and connects with a lower end side of the solar heat collection panel with the 15 other end, and an open/close valve mechanism 66 disposed in the water holding tank according to the embodiment. The water holding tank 62 is set to a height position h at which an internal water level is approximately set to the height position of the top edge of the opening 25 of the container body 26, the water in the water holding tank 62 is placed in the container body 26 via the pipe 64, the solar heat collection panel 2, and the pipe 14, and if the water reaches this liquid surface level on this occasion, the ball tap of the open/close valve mechanism closes, thereby maintaining the constant water level in the container body 26. [0037] A description will now be given of an operation of the simultaneous collection hot water device 1 according to this embodiment also referring to FIGS. 4 and 5. The water is supplied to the hot water reservoir tank 4 up to 80 liters, for example, by the constant quantity supply device 56 from a tap water faucet, for example. On the other hand, the water conveyance channel 6 of the solar heat collection panel is filled via the water holding tank 62 and the pipe 64 by the constant-water-level water supply mechanism 60, and the water is further filled up to the water level close to the top edge portion of the opening 25 of the container body 26. A drive device such as a pump is not used to supply and fill the water. A time zone in which the air temperature and the water temperature are increased by the sun to the highest values centers around a time zone from midday to 3:00 p.m. during the day, though it varies according to season. The water in the solar heat collection panel 2 receives the solar radiation and is thus heated to hot water, and the temperature at a portion of the inlet port 10 of the solar heat collection panel 2 increases to approximately 80 0 C at highest even in November, for example. Further, a temperature of 75'C to 800C is maintained at the water surface portion of the container body 26, and the water evaporates from the water surface, and diffuses in the evaporation chamber as vapor. The solar heat collection panel is tilted at approximately 35 degrees with 16 respect to the horizon, for example, and, due to the difference in height between the evaporation tank 3 and the solar heat collection panel, the water inside the first circulation system M constructed by the solar heat collection panel 2 and the evaporation tank 3 receives the solar heat, is gradually heated to hot water, and circulates in the system by the convection (FIG. 4) . When the vapor in the evaporation chamber 20 comes in contact with the evaporation/condensation wall 34, it condenses to dews Dn due to the difference in temperature from the water in the circulation communication chamber portion 28, and attaches on the evaporation/condensation wall 34. The dews then flow down the evaporation/condensation wall 34, are retained in the bottom portion of the evaporation chamber, and the distilled water Q is collected by a valve opening operation according to necessity. Distilled water from which impurities and the like high in mass have been removed is generally acquired, and is preferably obtained as drinking water by interposing a mineral water generation device or the like including mineral powder capsules or the like, not shown, for meeting sense of taste according to necessity (FIG. 5). The water in the circulation communication chamber 28a which has exchanged heat with the vapor at the evaporation/condensation wall 34 is heated, and flows into the hot water reservoir tank 4. Since the hot water reservoir tank 4 is disposed at the position higher than the evaporation tank 3 containing the circulation communication chamber 28a, the water heated in the circulation communication chamber 28a circulates by convection in the second circulation system N. The hot water, which has been heated to approximately 38*C, for example, is supplied to a kitchen sink 71, a bath 72, an underfloor heating device 73, and the like as shown in FIG. 5. The water for the hot water supply in the hot water reservoir tank 4 is basically used only once, and is newly supplied for a subsequent use. Example [0038] A description will now be given of an example of the solar water heating device for simultaneously collecting 17 drinking water/hot water using the configuration of the above-described embodiments. [Example 1] [0039] <Temperature Measurement> For the device configuration according to the first embodiment, detection positions were set to portion number locations indicated by (i) (portion of the upper layer water level of the container body), (ii) (portion close to the bottom portion of the evaporation chamber), (iii) (outlet portion of the heat collection panel), (iv) (inlet portion of the heat collection panel), and (v) (bottom portion of the reservoir tank) in FIGS. 8(a), (b), and temperatures of the respective locations were measured and recorded by a chart recorder (DR230 manufactured by Yokogawa Electric Corporation) on a day in November in a time zone from 10:00 a.m. to 17:00 p.m. <Product Specification> The device used in the measurement in the example has the following specification: solar heat collection panel: width: 1 meter, length: 2 meters, evaporation tank: 29.3 liters (p377mmx715mm), container body: 0.6 liters, and hot water reservoir tank: 81.2 liters. The entire device was installed in a tilted arrangement at 35 degrees. <Charts> FIG. 6 shows actual measured values for each time, and FIG. 7 shows a result in a chart form. The upper most row of the table in FIG. 6 shows times, and lower rows show temperatures

(

0 C). As shown in the chart in FIG. 7, the temperatures at the outlet and inlet port portions of the solar heat collection panel (iii), (iv) were approximately 80'C even in the winter season, the temperature at the bottom portion (v) of the hot water reservoir tank as the hot water supply source increased to approximately 30 0 C at 13:00, and it is appreciated that it can be variously applied. It should be noted that there was a trouble in fixed states of a detection element at the detection locations at 13:00, and the actual measured values thus contain measurement errors. Further, 5.5 liters of the distilled water 18 was obtained from the evaporation tank. It is possible to obtain a drink easy for drinking by adding minerals to the distilled water in order to promote use for drinking. It is possible to stably obtain a high quality drinking water particularly in an area in which high quality tap water is hard to obtain in urban zones or in an area poor in terms of water environment. [0040] The solar water heating device for simultaneously collecting drinking water/hot water according to the present invention is not limited to the configurations according to the above-described embodiments, and modifications made without departing from the gist of the invention described in CLAIMS are also included in the present invention. Industrial Applicability [0041] The solar water heating device for simultaneously collecting drinking water/hot water according to the present invention can be employed in ordinary hot water supply and drinking water acquisition in a general household as well as in various offices and factories, and in the fields of product manufacturing, agriculture, medicine, and the like. Description of Numerals [0042] 1 solar water heating device for simultaneously collecting drinking water/hot water 2 solar heat collection panel 3 evaporation tank 4 hot water reservoir tank 5 distilled water extraction opening 10 inlet port 12 outlet port 20 evaporation chamber 20a evaporation space 21 hot water support means 22 inner tube 24 outer tube 25 opening 26 container body 19 28 circulation communication chamber portion 34 evaporation/condensation chamber 41 hot water reservoir tank according to another embodiment 60 constant-water-level water supply mechanism 66 open/close valve mechanism M first circulation system N second circulation system Q distilled water 20

Claims

1. A solar water heating device for simultaneously collecting drinking water/hot water type comprising: a solar heat collection panel; an evaporation tank disposed at a position higher than and close to the solar heat collection panel, which communicates with and connects to the solar heat collection panel and has a space for receiving and evaporating hot water heated by the solar heat collection panel; a hot water reservoir tank disposed at a position higher than and close to the evaporation tank, in which stored water becomes hot water by exchanging heat with the evaporated hot water of the evaporation tank, and the hot water is collected externally; and an extraction opening provided on the evaporation tank in which condensed liquid of the evaporated hot water as a result of the heat exchange with the water in the hot water reservoir tank is directly extracted as distilled water, and is externally collected as drinking water.

2. The solar water heating device for simultaneously collecting drinking water/hot water according to claim 1, wherein the evaporation tank includes an evaporation chamber that forms, along with the solar heat collection panel, a circulation system for the hot water to be heated by the solar heat collection panel, and a hot water support means disposed in the evaporation chamber, that supports the hot water to be heated in a state in which the hot water is directly in contact with a space inside the evaporation chamber.

3. The solar water heating device for simultaneously collecting drinking water/hot water according to claim 2, wherein the evaporation tank integrally includes a circulation communication chamber portion partitioned from, and disposed adjacent to the evaporation chamber, that communicates with the hot water reservoir tank for circulating a liquid in the hot water reservoir tank, and includes an evaporation/condensation wall for the heat exchange between the hot water of the solar 21 heat collection panel and the liquid in the hot water reservoir tank.

4. The solar water heating device for simultaneously collecting drinking water/hot water according to claim 3, wherein the evaporation/condensation wall includes a wall having an arc or a circular cross section.

5. The solar water heating device for simultaneously collecting drinking water/hot water according to any of claims 2 to 4, wherein the evaporation tank includes a double-tube structure where the evaporation chamber and the circulation communication chamber portion are integrally formed by inner/outer double tubes.

6. The solar water heating device for simultaneously collecting drinking water/hot water according to any of claims 2 to 5, wherein the hot water support means includes a container body disposed in the evaporation chamber in a state in which it communicates with and connects to an outlet and an inlet for the hot water in the solar heat collection panel, and has an opening at a top surface for receiving the hot water.

7. The solar water heating device for simultaneously collecting drinking water/hot water according to any of claims 1 to 6, comprising a first circulation system that includes a hot water circuit by means of a difference in height between the solar heat collection panel and the evaporation tank, and a second circulation system that includes the a water circuit by means of a difference in height between the evaporation tank and the hot water reservoir.

8. The solar water heating device for simultaneously collecting drinking water/hot water according to any of claims 1 to 7, comprising a constant-water-level water supply mechanism that maintains a constant liquid surface level of the hot water support means of the evaporation tank. 22