Utility model content
Main purpose of the present utility model is to provide a kind of storage-type electric water heater, is intended to make the hot water of output to reach fast thermal effect, improves heat exchange efficiency and the hot water delivery rate of fast hot heating tube, thereby saves the energy.
To achieve these objectives, the utility model proposes a kind of storage-type electric water heater, comprise inner bag, water inlet pipe and outlet pipe component, described outlet pipe component comprises outlet pipe, fast hot heating tube and sleeve, described outlet pipe and the hot heating tube of described speed are installed in described sleeve, and the periphery wall of described sleeve is provided with thermal insulation layer.
Preferably, described thermal insulation layer is heat-shrinkable tube or the silica gel sheath that is sheathed on described sleeve, and described thermal insulation layer is close to the periphery wall of described sleeve.
Preferably, the periphery wall of described thermal insulation layer is coated with metal forming.
Preferably, described metal forming is aluminium foil.
Preferably, described sleeve is provided with hollow layer, and described hollow layer is filled with the expanded material for insulation.
Preferably, described expanded material is polyurethane foam material or polypropylene plastics expanded material.
Preferably, described sleeve is double-level-metal vacuum tube.
Preferably, the inwall of described sleeve is coated with thermal insulation coatings, to form heat insulation coating.
Preferably, the thickness of described thermal insulation layer is 2~5mm.
A kind of storage-type electric water heater provided by the utility model, be provided with thermal insulation layer by the sleeve outer wall at outlet pipe component, for intercepting the heat exchange between the hot water in outlet pipe component and the cold water in inner bag, therefore can improve heat exchange efficiency and the hot water delivery rate of fast hot heating tube, reach the object of saving the energy, in addition, this insulating layer structure is simple, it is convenient to assemble, and makes lower cost for material, therefore can enhance productivity and reduce production costs.
The specific embodiment
Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
Referring to Fig. 1, Fig. 2 and Fig. 3, Fig. 1 is the structural representation of storage-type electric water heater one embodiment of the present utility model; Fig. 2 is the structural representation of the outlet pipe component shown in Fig. 1; Fig. 3 is the structural representation that the outlet pipe component shown in Fig. 1 is equipped with thermal insulation layer.
The storage-type electric water heater that the present embodiment provides, comprise inner bag 10, water inlet pipe 11 and outlet pipe component 12, water inlet pipe 11 and outlet pipe component 12 are all arranged on the bottom of inner bag 10, water inlet pipe 11 offers some apopores along water inlet pipe 11 circumferential distribution near the hypomere part of inner bag 10 bottoms, and the upper end of outlet pipe component 12 extends the top of inner bag 10.Outlet pipe component 12 comprises outlet pipe 121, fast hot heating tube 122 and sleeve 123, outlet pipe 121 and fast hot heating tube 122 are all installed in this sleeve 123, the hot heating tube 122 of speed is for carrying out post bake to hot water to be flowed out in outlet pipe 121 and sleeve 123, to realize the Fast Heating of output hot water, reach the object that improves hot water delivery rate.But, in the time that storage-type electric water heater is worked, cold water flows in inner bag 10 through the apopore of water inlet pipe 11, because the density of the density ratio hot water of cold water is large, therefore cold water can sink to the bottom of inner bag 10, and continue to increase along with flowing to the cold water of inner bag 10, the cold water that is positioned at inner bag 10 bottoms is lifted gradually, thereby in inner bag 10, form stable hot and cold water layering.The part that outlet pipe component 12 is positioned at cold water layer (is understandable that with cold water, the cold water of indication is treated heat outputting water mutually herein, temperature may reach 40~50 ℃, even higher) between the temperature difference larger, therefore hot water to be exported can carry out heat exchange by sleeve 123 and the cold water in inner bag 10, thereby reduce the temperature of hot water, cause the heat exchange efficiency of fast hot heating tube 122 to decline, greatly reduce capacity usage ratio and hot water delivery rate.In order to make hot water to be exported reach the effect of speed heat, the periphery wall of sleeve 123 is provided with thermal insulation layer 20, thermal insulation layer 20 adopts thermal conductivity factor little, high temperature resistant and aging-resistant heat-barrier material is made, play the effect that the hot water in obstruct outlet pipe component 12 and the cold water in inner bag 10 carry out heat exchange, thereby improve heat exchange efficiency and the hot water delivery rate of fast hot heating tube 122, reached the object of saving the energy simultaneously.
In the present embodiment, sleeve 123 is metal circular tube, and thermal insulation layer 20 is for being sheathed on heat-shrinkable tube or the silica gel sheath of this sleeve 123.The periphery wall of heat-shrinkable tube or silica gel sheath and sleeve 123 is close to, thereby plays better heat-blocking action.Heat-shrinkable tube has the characteristic of thermal contraction, the heat-shrinkable tube that therefore can first internal diameter be slightly larger than to sleeve 123 external diameters is sheathed on sleeve 123, then heat-shrinkable tube (is for example heated to default temperature, 70~90 ℃), now heat-shrinkable tube shrinks, to entangle firm on sleeve 123, production technology is simple, with low cost, can reach good effect of heat insulation, obviously improve hot water delivery rate.For silica gel sheath, because it has good elasticity and heat endurance, the silica gel sheath that internal diameter can be slightly less than to sleeve 123 external diameters is sheathed on sleeve 123, entangle firm on sleeve 123 by the elastic force of silica gel sheath self, do not need extra securing member or syndeton to be fixed, there is production technology simple yet, feature with low cost, can reach good effect of heat insulation, obviously improve hot water delivery rate.Be understandable that, with reference to above-mentioned explanation, in other embodiment of the present utility model, can also adopt other any suitable heat-barrier materials in a tubular form as thermal insulation layer 20, therefore not to repeat here.
It is worth mentioning that, the thickness of heat-shrinkable tube and silica gel sheath can be determined according to actual needs, to guarantee that heat-shrinkable tube and silica gel sheath reach applicable effect of heat insulation, improves hot water delivery rate and saves the energy.For example, in the present embodiment, the thickness of heat-shrinkable tube and silica gel sheath is preferably 2~5mm, is guaranteeing that it meets under the prerequisite of heat insulation requirement, reduces production costs.Certainly, in other embodiment of the present utility model, heat-shrinkable tube and silica gel sheath can also be other any suitable thickness, and therefore not to repeat here.
In the present embodiment, for the service life of prolong insulation layer 20 and the heat-proof quality of assurance thermal insulation layer 20, the periphery wall of thermal insulation layer 20 is coated with metal forming (not shown), thereby thermal insulation layer 20 is surrounded to sealing.
Further, in order to reduce production costs and to simplify production technology, the metal forming of above-described embodiment is preferably aluminium foil.In addition, feature corrosion-resistant, fine heat-resisting performance that aluminium foil also has, meets the instructions for use of hot environment, is combined with the effect of heat insulation that can reach more excellent with thermal insulation layer 20.Be understandable that, in other embodiment of the present utility model, aluminium foil can also be by other any suitable material substitutions, for example, clad aluminum foil, Copper Foil etc., therefore not to repeat here.
In the present embodiment, carry out heat exchange efficiency in order further to reduce hot water in outlet pipe component 12 and the cold water in cold water layer, the hot water delivery rate that guarantees outlet pipe component 12, sleeve 123 is provided with hollow layer (not shown), and this hollow layer is filled with the expanded material for insulation.Expanded material is preferably polyurethane foam material or polypropylene plastics expanded material, and temperature resistant capability is strong, and thermal and insulating performance is good, has delayed the heat exchange rate between hot water and cold water, has effectively guaranteed hot water delivery rate.
In the present embodiment, sleeve 123 can also be double-level-metal vacuum tube, with the acting in conjunction of thermal insulation layer 20 under, make the hot water in outlet pipe component 12 reach better effect of heat insulation, reducing to a greater extent heat loss.
It is worth mentioning that, on the basis of above embodiment, in order further to improve the heat-insulating capability of sleeve 123, the inwall of sleeve 123 is coated with thermal insulation coatings, to form heat insulation coating.The main component of thermal insulation coatings is nano-hollow ceramic fine bead and inorganic polymer solution, certainly, can be also the mixed serum that comprises other any suitable compositions.Therefore, can effectively suppress and the conduction of radiation-screening heat and heat, heat insulation suppression efficiency is high, can suppress the heat radiation of hot water in outlet pipe component 12 and scattering and disappearing of heat, assurance hot water delivery rate.
Should be understood that; these are only preferred embodiment of the present utility model; can not therefore limit the scope of the claims of the present utility model; every equivalent structure or conversion of equivalent flow process that utilizes the utility model description and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.