CN2295169Y - Plate-type heat-pipe solar water-heater - Google Patents

Abstract

The utility model discloses a solar water heater with a plate type heat pipe. The utility model comprises a plate-shaped heat pipe which is arranged in a shell of the water heater; a water tank is welded on the condensing section of the plate-shaped heat pipe, the bottom and the lateral sides of the water tank are provided with insulation materials, and the upper side of the shell is provided with a transparent cover plate. Because an insulated insulation layer is arranged between the evaporation section of the plate-shaped heat pipe on the facade of the water heater and the water tank and the facade of the water tank adopts selective paint, the heat loss of the air convection in the water heater is reduced, and heat collecting efficiency and insulation efficiency are increased. Water temperature in winter can reach about 45 DEG C., heat insulating time is prolonged, and the utility model can be used for four seasons. The utility model has the advantages of compact structure, convenient installation, reliable performance and low cost.

Description

A kind of plate-type heat-pipe solar water heater

The utility model belongs to solar water heater, specifically, is the improvement to the plate-type heat-pipe solar water heater.

Chinese patent specification CN2053731U discloses a kind of plate-type heat-pipe solar water heater, plate shape heat pipe in the water heater housing adopts pressure-bearing sandwich, the condensation segment on plate shape heat pipe top is one as the end and the water tank weldering of water tank, insulation material is equipped with in the back side and side, on the water heater housing transparent cover plate is housed.Adopt such structure, the evaporator section of plate shape heat pipe and the front of water tank all can absorb solar energy, and heating surface area is big, compact conformation, and the contact area of the condensation segment of plate shape heat pipe and water is bigger simultaneously, good effect of heat exchange.Communicate but have than large space and with the space in water tank front in the front of water heater inner panel shape heat pipe evaporator section, therefore, the cross-ventilation heat loss is bigger, is unfavorable for the thermal-arrest and the insulation of water heater, has influenced to promote and use.

The purpose of this utility model is the plate-type heat-pipe solar water heater that a kind of collecting efficiency height, high insulating effect are provided at the deficiency of above-mentioned prior art.

For achieving the above object, the technical solution of the utility model is: plate shaped heat pipe places in the water heater housing, the condensation segment on its top is one as the end and the water tank weldering of water tank, insulation material is equipped with in its back side and side, on the water heater housing transparent cover plate is housed, mounting bracket is equipped with in the outside, is characterized in, between the top and water tank of water heater front plate shape heat pipe evaporator section, be provided with plate shape heat pipe evaporator section and the separated insulating of water tank.

In addition, the front of water tank scribbles and selects to give birth to coating.

After adopting above-mentioned skill water scheme, owing between water tank and plate shape heat pipe evaporator section, be provided with insulating, thus limited the cross-ventilation in the water heater, reduced the convection heat losses; Because selective coating has the absorptivity height, emissivity is low, only, not only improved heat absorption capacity at the positive selective coating that uses of water tank, reduced the heat loss that the water tank radiation produces, and consumption is few, cost is low.

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is the cutaway view of first embodiment of the utility model plate-type heat-pipe solar water heater.

Fig. 2 is the front view of Fig. 1 plate-type heat-pipe solar water heater.

Fig. 3 is the cutaway view of another embodiment of the utility model plate-type heat-pipe solar water heater.

Plate-type heat-pipe solar water heater shown in Figure 1, plate shape heat pipe 6 adopts pressure-bearing sandwich, the condensation segment on its top is one as the end and water tank 8 welderings of water tank, integral body places in the water heater housing 2, foaming thermal-insulating 3 is equipped with in its back side and side, transparent cover plate 5 is housed on the water heater housing 2, mounting bracket 4 is equipped with in the outside, water tank 8 is provided with intake-outlet 10 and exhaustion spill mouth 1, plate shape heat pipe 6 evaporator section tops laterally are equipped with insulating 7 one near the position of water tank 8 lower limbs, the front of water tank 8 scribbles selective coating, and the front of plate shape heat pipe 6 evaporator sections scribbles common black heat-absorbing paint.

Fig. 2 has showed the Facad structure of Fig. 1 plate-type heat-pipe solar water heater, and insulating 7 is capped under the transparent cover plate 5 among the figure.

Plate-type heat-pipe solar water heater shown in Figure 3 and the difference of Fig. 1 are, the upper surface of water heater housing 2 is a step, in the dead ahead of plate shaped heat pipe 5 evaporator sections and the dead ahead of water tank 8 transparent cover plate 11 and 12 are housed respectively, insulating 7 rides in the step high spot of water heater housing 2, the upper surface and the distance between the transparent cover plate 11 of plate shape heat pipe 6 evaporator sections are about 2.5 centimetres, distance between the upper surface of water tank 8 and the transparent cover plate 12 also adopts above-mentioned size, so that obtain better heat insulation effect.

In the above-described embodiment, plate shape heat pipe 6 adopts the sheet copper punching presses, is welded, by finding time fluid-filling nozzle 9 extracting vacuum and fill the encapsulation of heat-conducting work medium (as acetone) back; Water heater housing 2 usefulness metal materials or fiberglass are made; Insulating 7 adopts polystyrol foam material, polyurethane foam material or asbestos material to make, bed thickness is about 2～3 centimetres, its periphery closely contacts with the insulation material of transparent cover plate 5 or 12, plate shape heat pipe 5 and water heater housing 2 interior both sides respectively, thereby the space in the water heater is separated into two mutual independently less spaces; The evaporator section in plate shape heat pipe 6 fronts is a heat collector surface, and the common black heat-absorbing paint that adopts absorptivity and emissivity to equate substantially is with low cost, and the front of water tank employing absorptivity height, selective coating that emissivity is low, the present price of this coating is higher.When thermal-arrest state in the daytime, cross-ventilation in the water heater is subjected to the restriction of insulating 7, weakening is the convection current in two less compartments, the convection heat losses is reduced, collecting efficiency is improved, plate shape heat pipe 6 evaporator sections common black heat-absorbing paint and selective coating positive and that adopt respectively in water tank 8 fronts all have higher absorptivity (more than 0.9), endothermic effect is basic identical, when be in keeping warm mode night, because selective coating reflectivity low (0.1-0.3), the heat radiation of water tank 8 significantly reduces, and convective cooling also is subjected to the containment of insulating 7, in addition, though plate shape heat pipe 6 evaporator sections have adopted the high common black heat-absorbing paint of emissivity, because the unidirectional conductivity of heat of heat pipe, heat can be by condensation segment to the evaporator section transmission, therefore, do not influence the heat insulation effect of water tank 8.

The solar water heater that adopts the utility model to make, compact conformation, characteristics easy for installation have not only been kept, and collecting efficiency height, high insulating effect, but about these 45 ℃ of water temperature in winter, temperature retention time can extend to before and after the midnight, the four seasons can be used, and dependable performance, cost is lower, suits to promote the use of in cities and towns and vast rural area.

Claims (4)

1, a kind of plate-type heat-pipe solar water heater, plate shape heat pipe (6) places in the water heater housing (2), the condensation segment on its top is one as the end and water tank (8) weldering of water tank, insulation material (3) is equipped with in its back side and side, transparent cover plate (5) is housed on the water heater housing (2), mounting bracket (4) is equipped with in the outside, it is characterized in that: between the top and water tank (8) of water heater front plate shape heat pipe (6) evaporator section, be provided with plate shape heat pipe (6) evaporator section and the separated insulating of water tank (8) (7).

2, a kind of plate-type heat-pipe solar water heater according to claim 1 is characterized in that: described insulating (7) adopts plastic foam material or asbestos material.

3, a kind of plate-type heat-pipe solar water heater according to claim 1, it is characterized in that: the front of described water tank (8) scribbles selective coating.

4, a kind of plate-type heat-pipe solar water heater according to claim 1, it is characterized in that: the upper surface of described water heater housing (2) can also be a step, between plate shape heat pipe (6) evaporator section and the transparent cover plate (11) and the distance between water tank (8) and the transparent cover plate (12) be about 2.5 centimetres.

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