CN201181114Y

CN201181114Y - Circulation type natural convection efficient solar water heater

Info

Publication number: CN201181114Y
Application number: CNU2008200659786U
Authority: CN
Inventors: 曾舟华; 徐振强; 曾昆; 周亚平
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-03-11
Filing date: 2008-03-11
Publication date: 2009-01-14
Anticipated expiration: 2018-03-11

Abstract

The utility model relates to a circulation-type natural-convection high-efficiency solar water heater which solves the problem of difficulty in the heat exchange between the hot water and the cold water in the conventional solar water heater. The solar water heater is characterized in that a water-circulating device is additionally arranged between a water tank (1) and a heat-absorbing tube (2), so as to allow the water heated inside the heat-absorbing tube (2) to flow upwards to the water tank (1) in time, and the heat-absorbing tube (2) can be replenished from the bottom by the cold water inside the water tank (1), thereby accelerating the cold/hot water circulation and greatly increasing the heat efficiency.

Description

Circulating free convection efficient solar water heater

One, technical field

The utility model belongs to a kind of solar water heater, relates in particular to a kind of efficient solar water heater that utilizes inside and outside EGR by the free convection augmentation of heat transfer.

Two, background technology

At present, the solar water heater that people generally use all is made up of storage tank, endothermic tube and heat collector, rely on the principle that hot water rises, cold water descends to exchange automatically because hot water in the endothermic tube and the exchange of the cold water in the storage tank are simple, the hot water that rises and the cold water of decline bump in endothermic tube import department, heat exchange effect is relatively poor, water in the storage tank need can not in time satisfy people's water needs through ability heat supply water after sunshine considerable time.

Three, summary of the invention

The purpose of this utility model just provides a kind of thermal efficiency height, lower, easy to use, the reliable quality solar water heater of cost.The technical solution of the utility model is: both can in solar energy heat absorption pipe, set up mozzle on the basis of original technical equipment.Also can on the basis of existing tube-in-tube solar water heater, set up cool water circulating pipe, its upper end and the bottom connection that connects the solar energy water storage tank, the bottom connection of lower end and every solar energy heating pipe.Outside mozzle or tube-in-tube, further set up metal threaded guiding gutter, prolong the flow process of the hot water in solar energy heat absorption pipe and the heat pipe annular space, increase flow velocity, reduce the thickness in boundary layer, reach the purpose of further augmentation of heat transfer.

The novel effect of this use is owing to set up water circle device between storage tank and endothermic tube, can flow into storage tank rapidly after making the water heating between endothermic tube and mozzle or the tube-in-tube annular space, cold water in the storage tank replenishes for the endothermic tube bottom through mozzle or cool water circulating pipe, thereby reach the purpose of flash heat transfer, solar heat is imitated and is greatly improved.

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

Four, description of drawings

Fig. 1 is the utility model internal-circulation type structural representation;

Fig. 2 follows the formula structural representation for the utility model outer shroud.

Wherein: 1 is storage tank, and 2 is endothermic tube, and 3 is annular space, and 4 is mozzle, and 5 is cool water circulating pipe, and 6 is tube-in-tube, and 7 is the screw thread guiding gutter.

Five, the specific embodiment

Embodiment 1: as shown in Figure 1, it is that ring follows mode in adopting, and on the basis of original technical equipment, in solar energy heat absorption pipe 2, sets up mozzle 4.When shining upon, the water in the annular space 3 between solar energy heat absorption pipe 2 and the mozzle 4 is heated, and hot water density is little, upwards flows to storage tank 1.The lower water of temperature in the storage tank 1 from top to bottom flows to solar energy heat absorption pipe 2 bottoms through in the mozzle 4, replenishes the space that stays after hot water upwards flows.This has just formed the free convection of heat-transfer pipe internal-circulation type, has reached the purpose of augmentation of heat transfer.

Embodiment 2: as shown in Figure 2, it is to adopt the outer circulation mode, on the basis of existing tube-in-tube solar water heater, sets up cool water circulating pipe 5.The bottom of the last termination solar storage water tank 1 of cool water circulating pipe 5, the other end connects the bottom of every solar energy heat absorption pipe 2.When shining upon, the water in the annular space 3 between solar energy heat absorption pipe 2 and the tube-in-tube 6 is heated, and hot water density is little, upwards flows to water tank.The lower water of temperature in the water tank from top to bottom flows to solar energy heat absorption pipe 2 bottoms through cool water circulating pipe 5, replenishes the space that stays after hot water upwards flows.This has just formed the free convection of heat-transfer pipe outer circulation type, thereby can reach the purpose of augmentation of heat transfer.

Implementing the utility model can also be outside mozzle 4 or tube-in-tube 6, further set up metal threaded guiding gutter 7, prolong the flow process of the hot water in the annular space 3 between solar energy heat absorption pipe 2 and mozzle 4 or the tube-in-tube 6, increase flow velocity, reduce the thickness in boundary layer, reach the purpose of further augmentation of heat transfer.It will be hurry up than the heat temperature raising of tube-in-tube solar water heater, and is more faster than the heat temperature raising of common solar water heater.Being more suitable in heating tube is solar water heater more than 2 meters, and the overlength heating tube helps solar energy and architecture-integral.

Claims

1, a kind of circulating free convection efficient solar water heater, it is made up of support, storage tank (1) and endothermic tube (2), it is characterized in that: set up water circle device between storage tank (1) and endothermic tube (2).

2, according to the described circulating free convection efficient solar water heater of claim 1, it is characterized in that: water circle device is to set up mozzle (4) in endothermic tube (2), forms annular space (3) between described mozzle (4) and the endothermic tube (2).

3, according to the described circulating free convection efficient solar water heater of claim 1, it is characterized in that: water circle device is by set up cool water circulating pipe (5) between endothermic tube (2) and storage tank (1), its upper end links to each other with storage tank (1), its lower end links to each other with the bottom of endothermic tube (2), be provided with sealed at both ends tube-in-tube (7) in the endothermic tube (2), its upper end links to each other with storage tank (1).

4, according to claim 2 or 3 described circulating free convection efficient solar water heaters, it is characterized in that: the mozzle (4) in the endothermic tube (2) and the surface of tube-in-tube (6) are provided with screw thread guiding gutter (7).