CN209783007U - Heat storage type solar water heater - Google Patents

Abstract

The utility model discloses a heat-retaining formula solar water heater, including casing, double-deck vacuum glass pipe, heat pipe and water circulating pipe, the heat pipe is located in the casing, the heat pipe surface is equipped with selective heat absorption coating, is provided with the water circulating pipe in the heat pipe, fills phase change material between heat pipe inner wall and the water circulating pipe, water circulating pipe one end is the water inlet, and the other end is the delivery port, the heat pipe outside is located to double-deck vacuum glass pipe box, double-deck vacuum glass pipe with there is the clearance between the heat pipe. The solar water heater utilizes the phase-change material to store heat and directly heat water, has the function of heat storage, and reduces the use of a water tank and a medium circulating pipe.

Description

Heat storage type solar water heater

Technical Field

The utility model relates to a solar device technical field, concretely relates to heat-retaining formula solar water heater.

Background

The solar water heater is a heating device for converting solar energy into heat energy, and heats water from low temperature to high temperature so as to meet the requirement of hot water in life and production of people. The existing solar water heater generally comprises a heat storage water tank and a vacuum tube which are assembled, and the heat storage water tank and the vacuum tube are arranged on a support. When the solar water heater works, the vacuum tube absorbs heat of solar energy, and the heated water flows into the heat storage water tank in a heat convection mode for reuse, and the solar water heater with the structure needs to use the water tank and the medium circulating tube, so that a user using the solar water heater, especially a family user, can occupy a certain indoor space due to the installation of the water tank, and the product manufacturing cost is high, thus the product price is high.

A Phase Change Material (PCM-Phase Change Material) is a substance that changes state of a substance with a Change in temperature and can provide latent heat. In the solar energy collection field, the phase-change material of corresponding model and kind can be adopted for heat storage, and the heat energy stored in the phase-change material is used for heating water. However, the phase change material is stored in the closed space by considering the volume change caused by the vaporization of the phase change material, the phase change material is transformed from a solid state to a liquid state after absorbing heat and then reaches the vaporization temperature, and the phase change material is transformed from the liquid state to the gas state continuously along with the temperature rise, for example, the vaporization temperature of part of the phase change material is about 70 ℃, once the temperature is higher than the vaporization temperature of 70 ℃, the phase change material is transformed into the gas state by vaporization, and the volume is expanded, so that the container for storing the phase change material needs to have extremely high strength.

SUMMERY OF THE UTILITY MODEL

The utility model provides a heat-retaining formula solar water heater embeds phase change material, utilizes the phase change material heat-retaining and directly heats water, has the heat-retaining function, reduces the use to water tank and medium circulating pipe.

In order to achieve the above object, the utility model adopts the following technical scheme:

The heat storage type solar water heater comprises a shell, a double-layer vacuum glass tube, a heat conduction tube and a water circulation tube, wherein the heat conduction tube is arranged in the shell, the water circulation tube is arranged in the heat conduction tube, a phase change material is filled between the inner wall of the heat conduction tube and the water circulation tube, one end of the water circulation tube is a water inlet, the other end of the water circulation tube is a water outlet, the double-layer vacuum glass tube is sleeved on the outer side of the heat conduction tube, a selective heat absorption coating is arranged in the double-layer vacuum glass tube, and a.

preferably, the double-layer vacuum glass tube comprises an inner tube and an outer tube, wherein vacuum is formed between the inner tube and the outer tube, and a selective heat absorption coating is arranged on the outer wall of the inner tube.

Preferably, the two ends of the gap are respectively provided with a sealing ring, and the sealing rings are sleeved on the port of the heat conducting pipe.

Preferably, the sealing ring comprises a sealing section and a limiting table, and the radius of the limiting table is larger than that of the sealing section.

Preferably, the water circulation pipe is a spiral type or a fin type.

Preferably, both ends of the heat pipe are closed by end caps.

preferably, the slide is symmetrically fixed to the two sides in the shell, a clamping piece is arranged in the slide, the clamping piece comprises two clamping plates, a plurality of semicircular holes are formed in the clamping plates, the semicircular holes of the two clamping plates are arranged oppositely, the inner diameter of each semicircular hole is equal to the outer diameter of the double-layer vacuum glass tube, and the double-layer vacuum glass tube is installed in the shell through the clamping piece.

preferably, the water outlet end is provided with an auxiliary heating device, and the auxiliary heating device is positioned on one side close to the user side.

Due to the structure, the beneficial effects of the utility model reside in that:

1. The solar water heater with the structure abandons the traditional mode of heating water in the water tank by adopting a medium after heating, does not need to use the water tank, the medium and a medium circulating pipe, stores heat energy after absorbing heat by using a phase-change material, heats the water in the water circulating pipe, and then supplies the heat energy to a user for use.

2. The double-layer vacuum glass tube effectively reduces the loss of heat to the environment through gas convection and conduction, improves the heat collection efficiency and has good heat preservation property at a certain temperature; the gap is arranged between the vacuum glass tube and the heat conduction tube and is used for preventing the double-layer vacuum glass tube from being damaged due to the fact that the heat conduction tube extrudes the double-layer vacuum glass tube because the volume of the phase change material expands due to temperature change; the sealing rings arranged at the two ends of the gap play a role in supporting and protecting the double-layer vacuum glass tube while reducing the air entering the gap; the water circulating pipe is arranged in a spiral or finned mode, so that the contact area between the water circulating pipe and the phase-change material can be increased, and the heat exchange efficiency is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below.

Fig. 1 is a schematic view of the overall structure of the present invention;

Fig. 2 and 3 are schematic views of the internal structure of the present invention;

fig. 4 is a schematic structural view of the sealing ring of the present invention;

Fig. 5 and 6 are schematic structural views of the water circulation pipe of the present invention;

Fig. 7 is a schematic structural view of the clamping member of the present invention;

Fig. 8 is a schematic view of the connection relationship of the auxiliary heating device of the present invention.

Detailed Description

The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1 to 8, a heat storage type solar water heater includes a housing 1, a double-layer vacuum glass tube 2, a heat conduction tube 3 and a water circulation tube 4, wherein the heat conduction tube 3 is disposed in the housing 1, the water circulation tube 4 is disposed in the heat conduction tube 3, a phase change material 5 is filled between an inner wall of the heat conduction tube 3 and the water circulation tube 4, one end of the water circulation tube 4 is a water inlet and is connected to an external water source, and the other end of the water circulation tube is a water outlet and is connected to a. The double-layer vacuum glass tube 2 is sleeved outside the heat conduction tube 3, a selective heat absorption coating is arranged in the double-layer vacuum glass tube, and a gap 6 exists between the double-layer vacuum glass tube 2 and the heat conduction tube 3.

The double-layer vacuum glass tube comprises an inner tube 21 and an outer tube 22, wherein vacuum is pumped between the inner tube 21 and the outer tube 22, and a selective heat absorption coating is arranged on the outer wall of the inner tube.

The 6 both ends in clearance are equipped with sealing washer 7 respectively, sealing washer 7 is established through self elasticity cover on the port of heat pipe 3, and the one end of sealing washer 7 extends to the clearance in and forms sealed section 71, and the sealing washer still is equipped with spacing platform 72 except that being used for sealed section, and the radius of spacing platform 72 is greater than the radius of sealed section 71, and spacing platform 72 can carry on spacingly to the sealing washer, and sealed section 71 and spacing platform 72 cooperate can be better play sealed effect, can support the protection through self elasticity to double glazing glass pipe 2 simultaneously.

the water circulation pipe 4 is spiral or finned (as shown in fig. 5 and 6), so that the contact area between the water circulation pipe and the phase-change material can be increased, and the heat exchange efficiency is improved.

The two ends of the heat conduction pipe 3 are sealed by end covers 8.

The bilateral symmetry is fixed with slide 9 in casing 1, and slide 9 comprises two relative U-shaped plates that set up of opening, is equipped with holder 91 in the slide 9, the holder includes two grip blocks, has seted up a plurality of semicircle orifices 911 on the grip block, and the semicircle orifice of two grip blocks sets up relatively, and the internal diameter in semicircle orifice equals the external diameter of double-deck vacuum glass pipe, double-deck vacuum glass pipe 2 utilizes the semicircle orifice of grip block to press from both sides tight fixed back, gets into in the slide from casing 1's top.

Temperature sensor 11 can also be installed to the delivery port end, main control unit (not shown in the figure) and auxiliary heating device 10, and auxiliary heating device is located and is close to user side one side, temperature sensor 11 and auxiliary heating device 10 all with main control unit electric connection, when temperature sensor 11 detects that delivery port department temperature is less than the default, start auxiliary heating device 10 through main control unit, be used for improving the leaving water temperature of user side, auxiliary heating device 10 can adopt TDR-30AX02 electric heating faucet, temperature sensor model DS18B20, main control unit is the microprocessing controller based on STM32 chip.

In this embodiment, adopt double glazing glass pipe, effectively reduced the heat through the loss of gas convection and conduction to the environment, make collecting efficiency improve, and there is fine heat preservation characteristic under the uniform temperature, see through double glazing glass pipe and pass through the heat pipe and absorb solar heat, the rethread heat pipe transmits phase change material, phase change material stores the heat, and heat the water in the water circulating pipe, this mode is compared in traditional solar water heater, the use to heating medium has been reduced, medium circulating pipe and water tank, water is directly sent to the hot water user side after heating through the water circulating pipe, and is swift convenient, heating efficiency is high, solar energy high-usage, energy loss has been reduced, moreover, the steam generator is simple in structure, effectively save the interior space.

In this process, the continuous heating can make the phase change material temperature in the heat conduction pipe constantly rise, and when partial phase change material when the high temperature, can take place vaporization phenomenon, in case the phase change material vaporizes, then the volume takes place the inflation, be provided with the clearance between vacuum glass pipe and heat conduction pipe, be used for preventing that phase change material from producing the double vacuum glass pipe that the volume expansion leads to heat conduction pipe extrusion double vacuum glass pipe to cause because of temperature variation and damage, and be provided with the sealing washer at clearance both ends, play support, guard action to double vacuum glass pipe when reducing the air admission clearance.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. a heat storage type solar water heater is characterized in that: including casing, double-deck vacuum glass pipe, heat pipe and water circulating pipe, the heat pipe is located in the casing, be provided with the water circulating pipe in the heat pipe, fill phase change material between heat pipe inner wall and the water circulating pipe, water circulating pipe one end is the water inlet, and the other end is the delivery port, double-deck vacuum glass pipe cover is located the heat pipe outside is equipped with selective heat absorption coating in the double-deck vacuum glass pipe, double-deck vacuum glass pipe with there is the clearance between the heat pipe.

2. The thermal storage solar water heater according to claim 1, wherein: the double-layer vacuum glass tube comprises an inner tube and an outer tube, wherein vacuum is formed between the inner tube and the outer tube, and a selective heat absorption coating is arranged on the outer wall of the inner tube.

3. The thermal storage solar water heater according to claim 1, wherein: and sealing rings are respectively arranged at two ends of the gap and sleeved on the ports of the heat conduction pipes.

4. The thermal storage solar water heater according to claim 3, wherein: the sealing ring comprises a sealing section and a limiting table, and the radius of the limiting table is larger than that of the sealing section.

5. The thermal storage solar water heater according to claim 1, wherein: the water circulating pipe is spiral or finned.

6. The thermal storage solar water heater according to claim 1, wherein: and two ends of the heat conduction pipe are sealed by end covers.

7. The thermal storage solar water heater according to claim 2, wherein: the double-layer vacuum glass tube clamping device is characterized in that slide ways are symmetrically fixed on two sides in the shell, clamping pieces are arranged in the slide ways and comprise two clamping plates, a plurality of semicircular holes are formed in the clamping plates, the semicircular holes of the two clamping plates are arranged oppositely, the inner diameter of each semicircular hole is equal to the outer diameter of the double-layer vacuum glass tube, and the double-layer vacuum glass tube is installed in the shell through the clamping pieces.

8. The thermal storage solar water heater according to claim 7, wherein: the water outlet end is provided with an auxiliary heating device, and the auxiliary heating device is positioned on one side close to the user side.