CN201000213Y - Split type dual energy solar water heater with axial heat exchanger - Google Patents

Abstract

The utility model relates to a split type dual energy sources solar energy water heater with an axial heat exchanger, which solves the problem that heat efficiency of the existing solar energy water heater is low. The utility model is characterized in that a heat exchange barrel body is cylinder shaped, one end of the heat exchange barrel body is sealed, the axial heat exchanger is arranged in the sealing end, a medium outlet pipe, a medium inlet pipe and an air outlet pipe are respectively arranged on the other end, the medium outlet pipe is extended to the middle and upper part of the heat exchange barrel body, the air outlet pipe is extended to the heat exchange barrel body over 3/4 of the heat exchange barrel body; the heat exchanger and a solar collector form a closed-loop heat exchanger circuit, the closed-loop heat exchanger circuit is filled with the freeze proof heat exchange working medium. The structure of the utility model convenient for the liquid natural convection and a method of increasing the heat-exchange area make the heat-exchange efficiency high, the circulating quantity of the heat transfer working medium is decreased at the same time, the heat capacity is reduced, the swelling capacity of the working medium is reduced, the system structure is simple, the fabrication cost is lowed, the heat collecting pipe from frost crack is prevented, and the efficiency of the split type solar energy water heater is improved.

Description

Split type dual energy solar water heater with axial heat exchanger

technical field

The utility model relates to a solar water heater.

Background technique

In order to improve the heat conduction conditions and improve the heat utilization rate of solar water heaters, Chinese patent 200320106105.2 discloses a pressure-bearing dual-energy split solar water heater, including a water storage tank and a heat collector. The water storage tank is composed of an inner tank, an insulation layer and an outer skin. The tank is equipped with an electric heater and anode magnesium rods; an interlayer is provided between the inner tank of the water storage tank and the insulation layer, and two heat-conducting medium circulation pipes are arranged in the insulation layer at the bottom of the water storage tank, and the upper ends of the two circulation pipes are respectively connected with the interlayer; One end of the heat collector is provided with a heat collecting chamber, and the upper and lower circulation pipes are arranged in the heat collection chamber. The lower ends of the two heat-conducting medium circulation pipes in the insulation layer of the water tank are connected; one end of the glass pipe is placed on the tailstock, and the other end is connected to the heat collection chamber; the U-shaped copper pipe in the vacuum glass pipe and the upper and lower circulation pipes in the heat collection chamber have heat transfer medium.

The existing heat exchange method is to let the heat generated from the solar cycle transfer heat from the outside of the water tank to the inside of the water tank through the water tank wall, and dissipate heat to the environment while transferring heat to the water tank. damage, the existing deficiency can be overcome by placing a heat exchanger in the water tank.

Contents of the invention

The invention aims to provide a split-type dual-energy solar water heater with an axial heat exchanger and high heat exchange efficiency.

The specific structural design scheme is as follows:

A split-type dual-energy solar water heater with an axial heat exchanger, including a solar heat collector, a water storage tank, a heat exchanger and a connecting pipe, the heat collector is a pressure-bearing heat collector with a metal flow channel, and it is characterized in that :

The heat exchanger is an axial heat exchanger, including a cylindrical heat exchange cylinder, one end of the heat exchange cylinder is closed, an axial heat exchange tube is arranged in the closed end, and a medium outlet pipe and a medium inlet pipe are respectively provided at the other end And the exhaust pipe, the medium outlet pipe extends into the upper middle of the heat exchange cylinder, and the exhaust pipe extends into the heat exchange cylinder for more than 3/4;

The medium inlet pipe and the medium outlet pipe are respectively connected to the outlet and inlet of the solar collector to form a closed-loop heat exchanger circuit, which is filled with anti-freezing heat-exchange working fluid;

The medium inlet and outlet pipes and exhaust pipe ends of the axial heat exchanger are located outside the water storage tank, and the other parts are located in the water storage tank.

The diameter of the heat exchange cylinder is 60-100 mm, and the length is 500-800 mm.

The axial heat exchanger of the utility model is designed to facilitate the natural convection of the liquid and increase the heat exchange area, so that the heat exchange efficiency is improved, and at the same time, the circulation volume of the heat transfer working medium is reduced, the heat capacity is reduced, and the expansion of the working medium is reduced. , the system structure is simple, the cost is reduced, the heat collecting tube is prevented from freezing and cracking, and the efficiency of the split solar water heater is improved.

The water storage tank adopts a steel-plastic liner water tank, which has good pressure bearing capacity, clean water quality, small thermal conductivity, and is convenient for heat preservation. At the same time, an electric auxiliary heating device is installed in the water tank to realize dual-energy heating and improve the comfort of use.

Description of drawings

Fig. 1 is a structural representation of the utility model,

Figure 2 is a schematic diagram of the structure of the axial heat exchanger,

Fig. 3 is A-A sectional view of Fig. 2,

Fig. 4 is a B-B sectional view of Fig. 2 .

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described by embodiment.

Example:

The split-type dual-energy solar water heater with an axial heat exchanger includes a solar heat collector 1, a water storage tank 2, a heat exchanger 3 and a connecting pipe 4, and the solar heat collector 1 is a pressure-bearing heat collector with a metal flow channel.

The heat exchanger 3 is an axial heat exchanger, including a cylindrical heat exchange cylinder 5. One end of the heat exchange cylinder 5 is closed, and an axial heat exchange tube 6 is installed in the closed end, and a medium outlet pipe 7 and a medium outlet pipe 7 are respectively installed at the other end. The inlet pipe 8 and the exhaust pipe 9, the medium outlet pipe 7 extend into the heat exchange cylinder 5, the exhaust pipe 9 extends into the heat exchange cylinder 5 for more than 3/4,

The medium inlet pipe 8 and the medium outlet pipe 7 are respectively connected with the outlet and the inlet of the solar heat collector to form a closed-loop heat exchanger circuit, and the closed-loop heat exchanger circuit is filled with an antifreeze heat-exchange working medium;

The medium inlet and outlet pipes and exhaust pipe ends of the axial heat exchanger are located outside the water storage tank, and the other parts are located in the water storage tank.

The diameter range of the heat exchange cylinder is 60-100 mm, and the length range is 500-800 mm.

By placing metal pipes with fins in the all-glass vacuum heat collecting tube used in the heat collector, the heat capacity is reduced, the heat exchange efficiency is increased by more than 10%, and the pressure can withstand more than 6 kg.

Its working principle is:

One end of the pressure-bearing solar collector 1 with a metal flow channel is provided with a heat collecting chamber, and the upper and lower circulation pipes are arranged in the heat collection chamber, and the upper and lower circulation pipes are respectively connected with the upper and lower circulation pipes of the heat exchanger 3 placed in the water storage tank 2 The tubes 4 are connected. When the solar heat collector 1 receives the solar energy, it will generate heat energy, which will flow into the heat exchanger 3 through the upper and lower circulation tubes 4. The heat exchanger 3 passes through the tube wall and the axial direction of the heat exchanger. The heat exchange tubes transfer heat energy to the water in the water storage tank 2. When the heat exchanger 3 transfers heat to the water storage tank 2, due to the axial heat exchange tubes, the convection speed of the water around the heat exchanger 3 will be reduced. Speed up to improve the efficiency of convection. There is an exhaust pipe in the heat exchanger 3, so that a part of the air is left on the upper part of the heat exchanger 3. When the temperature of the medium in the circulation inner pipe rises, the volume will expand, and the expanded volume will be compressed Air remains to equalize the pressure.

Claims (2)

1, have the split type dual-energy solar energy water heater of axial heat exchanger, comprise solar thermal collector, storage tank, heat exchanger and tube connector, described heat collector is the pressure-bearing type heat collector of metal flow passage, it is characterized in that:

Described heat exchanger is axial heat exchanger, comprise cylindric heat exchange cylindrical shell, the sealing of heat exchange cylindrical shell one end, be provided with axial heat exchanger tube in the blind end, the other end is respectively equipped with media outlet pipe, medium inlet and blast pipe, the media outlet pipe stretches to heat exchange cylindrical shell middle and upper part, and blast pipe stretches in the heat exchange cylindrical shell and surpasses 3/4;

Medium inlet and media outlet pipe are being communicated with the export and import of solar thermal collector respectively, form a closed loop heat-exchanger circuit, the antifreeze heat-exchange working medium of filling in the closed loop heat-exchanger circuit;

Axially the medium import and export pipe and the exhaust pipe end of heat exchanger are positioned at outside the storage tank, and other parts are positioned at storage tank.

2, the split type dual-energy solar energy water heater with axial heat exchanger according to claim 1, it is characterized in that: described heat exchange cylindrical shell diameter range is the 60-100 millimeter, and length range is the 500-800 millimeter.

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