CN2934993Y

CN2934993Y - Heat recovery type electric heater

Info

Publication number: CN2934993Y
Application number: CN 200620129802
Authority: CN
Inventors: 黄樟焱
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-07-27
Filing date: 2006-07-27
Publication date: 2007-08-15
Anticipated expiration: 2016-07-27

Abstract

A heat recovery electric heater comprises a nonmetal water pipe, a heating element arranged on outer side of the nonmetal water pipe and a water jacket arranged on outer side of the heating element. An inner cylinder of the water jacket and a water pipe are tightly coupled on lower ends. An end socket is provided on lower end of an outer cylinder of the water jacket. A water inlet of the electric heater is provided on top of the water jacket, and a water outlet of the heater is an opening on upper end of the nonmetal water pipe. The electric heater is primarily designed to heat flowing drinking water, and is used together with a free water dispenser without a heating pack. The utility model is characterized in that temperature of outgoing water is high; temperature of surface of the heater is low (about 50 Celsius systems); the utility model has no hidden trouble of fire, saves energy and is invulnerable to encrustment. The electric heater can also be used with other similar products and heat flowing clean liquid.

Description

Heat quantity reclaiming type electric heater

Affiliated technical field

The utility model relates to a kind of electric heater, refers in particular to the electric heater that is used for the water that flows is heated and can carry out heat recovery.

Background technology

At present, in the water dispenser industry, there are two classes known being used for to the electric heater that the water that flows heats.

The one class formation is the water for flowing in the wall, and wall is provided with the semiconductor heating element heater outward, and wall adopts the good nonmetallic materials manufacturing of insulating properties.This structure is because the semiconductor heating temp is lower, and when water temperature was higher, semi-conductive power can descend automatically, and promptly so-called temperature is from limitting characteristic, so this heater generally also can not be provided with heat-insulation layer.The electric heater leaving water temperature of this structure is lower, is generally 70 ℃～80 ℃, can not satisfy the requirement that the user drinks boiling water.

Another kind of structure is the electric heater that makes both be combined as a whole and make by casting electrothermal tube and stainless steel waterpipe, is a kind of electric heater 200410089171.2 " quick electric heating drinking water apparatus " disclosed as China Patent No..The heater element of this heater is a heating wire, and the temperature of heating wire is very high during work, can reach 600 ℃～800 ℃, and the heat that heating wire sends passes tube wall, the body of casting, the water pipe tube wall of insulating barrier, electrothermal tube successively, passes to the water in the pipe at last.Though its leaving water temperature of this structure is higher, thermal resistance is bigger, and the heater table surface temperature often surpasses 200 ℃, and disaster hidden-trouble is arranged, and energy consumption is big, and in addition, the thermic load of stainless steel waterpipe is bigger, the easy fouling of water pipe.

Summary of the invention

In order to overcome the existing deficiency that is used for the electric heater of mobile water heating, on the low side as leaving water temperature, though perhaps leaving water temperature is higher, but disaster hidden-trouble is big, energy consumption is big, easy scaling or the like, and the utility model provides a kind of heat quantity reclaiming type electric heater, this electric heater leaving water temperature height, heater appearance temperature low (about 50 ℃), no disaster hidden-trouble, energy-conservation, be difficult for scaling.The utility model electric heater is main and do not have a heat jar supporting drinking water that is used to add heat flow of water dispenser, also can with the supporting sanitary liquid that is used to add heat flow of other similar products.

The technical scheme that its technical problem that solves the utility model adopts is: at the arranged outside heater element of nonmetal water pipe, arranged outside insulation and thermal insulation layer at heater element, comprise the water leg that inner core and urceolus are formed in insulation and thermal insulation layer arranged outside, be provided with water inlet and exhaust outlet on the top of water leg, the urceolus lower end is provided with end socket, be provided with in the lower end of the lower end of water pipe and inner core and can prevent that sealing enters the hermetically-sealed construction of heater element place cavity, but on water pipe top and inner core, be provided with the structure of securing electric lines joint, upper end at urceolus and inner core is provided with hermetically-sealed construction, and the upper end of described water pipe is the electric heater delivery port.

Described nonmetal water pipe is meant the not only high temperature resistant but also anti-big temperature difference and the special glass pipe or the special cermacis pipe that do not break, and the smooth surface that contacts with water, this nonmetal water pipe also can be the not only high temperature resistant but also anti-big temperature difference and do not break and other non-metallic pipe of fine insulation characterisitic, the preferred special glass pipe that adopts the not only high temperature resistant but also anti-big temperature difference and do not break are arranged.Described heater element can be heating wire, also can be PTC heating pottery, also can be semiconductor heating coating, preferably adopt heating wire.Described heating wire can be that the surface is through suitably handling so that the heating wire that has good anti-oxidation characteristic under 600 ℃～800 ℃ temperature, this heating wire also can not done surface treatment, but must make space, heating wire place is vacuum state, the preferred heating wire with high-temp antioxidizing characteristic that adopts.

During the operation of the utility model heat quantity reclaiming type electric heater, current enter from the water inlet on water leg top, flow to the water leg bottom from top to bottom, lower end from water pipe enters in the water pipe again, in water pipe, flow from bottom to top then, flow out from the water pipe upper end at last, and the air in the water leg is upwards discharged from exhaust outlet.Because the outside of heater element is provided with heat-insulation layer, the heat overwhelming majority that heater element produces is used for heating pipe's water, a small amount of heat that sees through the insulation and thermal insulation layer is absorbed by the water in the water leg again, so this heater hull-skin temperature is very low, about 50 ℃, dispersed heat seldom so energy-saving effect is remarkable, and does not have disaster hidden-trouble in environment.When water pipe adopted special glass, the heat that heater element produces can be carried by the water in water pipe by conduction and heat radiation dual mode, so thermal resistance is little, it is fast to conduct heat, thereby the operating temperature of heating wire is also lower, and the life-span of heating wire is also longer.

Because the smooth surface that non-metallic pipe contacts with water and non-conductive, produce incrustation scale main component---calcium, magnesium ion are difficult at its surface deposition, even negligible deposition is arranged, because of the affinity of itself and nonmetallic surface very weak, these negligible deposition things are taken away by flowing water flow easily, so the nonmetallic surface that contacts with water produces incrustation scale hardly.

The beneficial effects of the utility model are, the hull-skin temperature of electric heater is low, no disaster hidden-trouble, and safety, energy-conservation, firing rate is fast, and the leaving water temperature height is difficult for scaling.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment one.

Fig. 2 is the A-A profile of Fig. 1.

Fig. 3 is water (flow) direction of the present utility model and discharge directions schematic diagram.

Fig. 4 is the structural representation of embodiment one when being applied to not have heat jar water dispenser.

Fig. 5 is the structural representation of the utility model embodiment two.

The specific embodiment

Below in conjunction with concrete accompanying drawing the utility model is described in detail, but is to be understood that the detailed description does not here constitute the restriction to the utility model protection domain.

Embodiment one: in conjunction with Fig. 1, Fig. 2 and shown in Figure 3, arranged outside heating wire (2) at pyroceram water pipe (1), arranged outside insulation and thermal insulation layer (3) at heating wire (2), comprise the water leg that inner core (4) and urceolus (5) are formed in insulation and thermal insulation layer (3) arranged outside, be provided with water inlet (6) and exhaust outlet (11) on the top of water leg, urceolus (5) lower end is provided with end socket (17), end socket (17) is provided with sewage draining exit (18), be provided with in the lower end of the lower end of water pipe (1) and inner core (4) and can prevent that sealing enters the sealing ring of heater element place cavity (15), the bottom of sealing ring (15) is provided with water-flowing trough (16), be provided with thermal insulation ceramics (14) in the top of sealing ring (15) and the below of heating wire (2), at water pipe (1) top and inner core (4) but top is provided with the ceramic ring (13) of securing electric lines joint (9), ceramic ring (13) is provided with ventilating groove (8), and ceramic ring (8) bonds with the inwall of the outer wall of water pipe (1) and inner core (4) respectively by exotic material (12) or is sintered to fix.Be provided with the hermetically-sealed construction of forming by ring cover (7) and sealing ring (10) on urceolus (5) top and inner core (4) top.Described heating wire (2) adopts the heating wire with good heat-resistance oxidation characteristic, and the material of described inner core (4) is identical with water pipe (1).

During the operation of present embodiment electric heater, current enter from the water inlet (11) on water leg top, flow to the water leg bottom from top to bottom, passing water-flowing trough (16) again enters in the water pipe (1), in water pipe (1), flow from bottom to top then, (being the electric heater outlet) flows out from water pipe (1) upper end at last, and the air in the water leg is upwards discharged from exhaust outlet (6).Heating wire (2) energising heating is initial, and the air in its place cavity is with expanded by heating, and the gas of expansion will be discharged from air-vent (8); During heating wire (2) cooling, the air in its place cavity will cool off contraction, and extraneous air can be from mending from air-vent (8); So heating wire (2) place cavity does not bear pressure.Because the outside of heating wire (2) is provided with heat-insulation layer, the heat overwhelming majority that heating wire (2) produces is used for the water of heating pipe (1), a small amount of heat that sees through insulation and thermal insulation layer (3) is absorbed by the water in the water leg again, the heat that promptly sees through insulation and thermal insulation layer (3) obtains reclaiming, so this heater hull-skin temperature is very low, about 50 ℃, dispersed heat seldom in environment, so energy-saving effect is remarkable, and there is not disaster hidden-trouble.

Fig. 4 is the structural representation that the utility model embodiment one is applied to not have heat jar water dispenser.In conjunction with shown in Figure 4, the water inlet (6) of present embodiment electric heater (20) links to each other with water dispenser bucket (27) bottom outlet pipe by water pipe (25), exhaust outlet (11) is received the top of water dispenser bucket (27) by blast pipe (24), delivery port (31) links to each other with pipe joint (23), and pipe joint (23) connects Tap of Potable Water Machine (21) by a valve (22) again.The top of described pipe joint (23) is also drawn a gland steam exhauster (26) and is linked to each other with blast pipe (24), and sewage draining exit (18) connects blow-off pipe (19).The position of described valve (22) is higher than the water level in the water dispenser bucket (27).When the user needs hot water, the power switch of water dispenser closes, heating wire (2) energising heating, valve (22) is opened, water in the bucket (27) enters electric heater (20) by water pipe (25), current are heated in flow process in electric heater (20) gradually, and the water that heated flows to pipe joint (23), valve (22) successively from delivery port (31), flow out from Tap of Potable Water Machine (21) at last.Because the position of valve (22) is higher than the water level in the water dispenser bucket (27), so have only the temperature of the water in heater water pipe (1) to rise to enough height, the density of water obviously descends, it is big that volume obviously becomes, when thereby the hot water water level obviously rose, hot water just can flow to water nozzle (21) by valve (22).

Embodiment two:

In conjunction with shown in Figure 5, present embodiment is a kind of simplification to embodiment one, in the present embodiment, inner core and water pipe are combined housings that links into an integrated entity in its lower end (28), be provided with air ring (30) in this lower part of frame, the lower end of air ring (30) is provided with water-flowing trough (32), is provided with ceramic ring (29) in the inner chamber of combined housing (28) bottom.Because the existence of ceramic ring, the distance between heating wire and the air ring (30) strengthens, so the present embodiment electric heater is switched on when heating, the temperature of air ring (30) can be too not high.Air ring (30) be used to support combined housing (28) simultaneously the water-flowing trough (32) on it also be current flow to water pipe from water leg passage.Other requirement of present embodiment is identical with embodiment one.

Claims

1. heat quantity reclaiming type electric heater, comprise nonmetal water pipe and be arranged on the outer heater element of nonmetal water pipe, it is characterized in that: the arranged outside insulation and thermal insulation layer of described heater element, comprise the water leg that inner core and urceolus are formed in insulation and thermal insulation layer arranged outside, top at water leg is provided with water inlet, the urceolus lower end is provided with end socket, be provided with in the lower end of the lower end of water pipe and inner core and can prevent that sealing enters the hermetically-sealed construction of heater element place cavity, be provided with hermetically-sealed construction in urceolus upper end and inner core upper end, the upper end of described water pipe is the delivery port of electric heater.

2. heat quantity reclaiming type electric heater according to claim 1 is characterized in that: described water pipe and inner core are the combined housings that the lower end fuses.

3. heat quantity reclaiming type electric heater according to claim 1 is characterized in that: described heater element is the heating wire with high temperature oxidation resisting characteristic.

4. heat quantity reclaiming type electric heater according to claim 1 is characterized in that: described nonmetal water pipe is the not only high temperature resistant but also anti-big temperature difference and the special glass that do not break.

5. heat quantity reclaiming type electric heater according to claim 1 is characterized in that: described water leg top is provided with exhaust outlet.

6. heat quantity reclaiming type electric heater according to claim 1 is characterized in that: described end socket is provided with sewage draining exit.