CN203240817U

CN203240817U - Vacuum heat collecting device with vertical barrel pressure reduction air drying protector

Info

Publication number: CN203240817U
Application number: CN2013202581950U
Authority: CN
Inventors: 潘香凤
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-05-10
Filing date: 2013-05-10
Publication date: 2013-10-16
Anticipated expiration: 2023-05-10

Abstract

A vacuum heat collecting device with a vertical barrel pressure reduction air drying protector comprises a vacuum heat collecting element with the vertical barrel pressure reduction air drying protector, a heat insulating water tank or a union box. The vacuum heat collecting element with the vertical barrel pressure reduction air drying protector is provided with the vertical barrel pressure reduction air drying protector inside a vacuum heat insulating layer at the tail end of a full glass vacuum heat collecting pipe, the vertical barrel pressure reduction air drying protector is composed of a heating power driving device and a heat transfer vertical barrel, wherein the heating power driving device is provided with a heat transfer connecting interface of an inner glass pipe of the heat collecting element. The heating power driving device comprises one of a temperature-sensitive permanent magnet steel driving device, a double-metal-piece driving device, a memory alloy driving device and a diaphragm capsule driving device. The vacuum heat collecting device with the vertical barrel pressure reduction air drying protector is characterized in that the heat transfer vertical barrel is directly connected with the tail end of the inner glass pipe or connected with the tail end of the inner glass pipe through a one-dimensional moving pair for heat sink in a low heat resistance mode, the vacuum heat collecting device can move back and forth, and the shape of the outer end portion of the vacuum heat collecting device is matched with the shape of the inner surface of the tail end of a cover glass pipe. Pressure of water vapor inside the heat pipe can be not more than two atmospheres only through one small-power air drying protector, and therefore reliability is high.

Description

Vacuum heat collecting device with straight tube decompression empty sun protection device

Technical field

The utility model relates to the vacuum heat collecting device with straight tube decompression empty sun protection device.

Background technology

Vacuum heat collection pipe arranges vacuum heat-insulating layer between its cover glass tube and inner glass tube, can make the vacuum solar water heater that also can provide the domestic hot-water winter.With the solar water heater of heat-pipe vacuum heat collecting pipe manufacturing have more in the pipe anhydrous Energy Efficiency Ratio high, meet safe drinking water standard, single tube and damage the advantage such as in the same old way work.Therefore.Anhydrous solar energy evacuated water-both with hot pipe might capture the increasing market share in the pipe.

Adopt the integrated glass heat pipe have can with cover glass tube melt envelope, glass heat pipe surface can directly make absorbing film heat transfer link few, can adopt the splendid water of thermophysical property to make the advantages such as working medium.

But during air drying, heat collecting element inside heat pipe temperature can reach 230 ℃, and saturated vapor pressure corresponding to this temperature is 28.53 atmospheric pressure, and corresponding working medium filling weight is that the working medium volumetric ratio is 1.1% with the ratio of heat pipe volume, and namely per 1 liter capacity has 11 ml waters.

The pressure of inside heat pipe in the time of can reducing air drying by reducing the working medium filling weight, take device of working medium as example: when working medium filling weight/heat pipe plot ratio 0.5% during from 5 milliliters/1000 milliliters are reduced to 2 milliliters/1000 milliliters 0.2%, correspondingly its highest saturated vapor pressure is reduced to approximately 3.7 atmospheric pressure of 140 ℃ from approximately 10 atmospheric pressure of 180 ℃, and inside heat pipe when approximately 3.7 atmospheric high-vapor-pressures continue to be warming up to 180 ℃ from 140 ℃ internal pressure only have about 4 atmospheric pressure.But the internal pressure when the working medium filling weight can not be only with air drying sometimes decides.For a working medium filling weight/heat pipe plot ratio be 0.2%, the heat pipe of 1000 milliliters of internal capacities, 2000 millimeters of length, if internal pressure is no more than 4 atmospheric pressure when making 230 ℃ of air dryings, then the working medium filling weight is approximately 1.8 milliliters.Be light-pipe structure even problem is described heat pipe, when tilting approximately 45 degree work, the condensed water of cold junction, the circulating water in hot junction add that 0.353 milliliter of sum of the water yield of 85 ℃ of water vapours can be far away from 1.8 milliliters.

Make working medium filling weight/heat pipe plot ratio greater than 0.2% even 0.3% in order to satisfy heat pipe normal operation, and guarantee glass heat pipe not because air drying and bombing must be taked the empty sun protection measure.

Chinese invention patent 2009101951003 anti-air drying all-glass vacuum heat collector tube elements; disclosed a kind of empty sun protection all-glass vacuum heat collector tube element; consist of by between vacuum heat collection element absorber and cover glass-tube, controlled heat transfer path being set; controlled heat transfer path is comprised of movable heat transfer piece and actuator, it is characterized in that containing the heating power transducing actuator that is connected with vacuum heat collection element absorber low thermal resistance.Because this patent is not specially for the gravity assisted heat pipe heat collecting element, thereby specific aim is not strong; The uniformity of the original product of bimetal leaf heating power transducing actuator that it adopts is just bad, restorable ability can reduce again after temperature distortion repeatedly, and operating point settings, control variables input, comparison, transducing and the Power supply that its control system of bearing is relevant and execution function far can not normally effectively be worked because precision is affected 20 year possible projected life of heat collecting element.

Fig. 4 provides the light-pipe structure gravity assisted heat pipe structural representation of a tiltably-mounted.

Among Fig. 4, heat pipe 1 is made by shell and internal working medium.Its operation principle is: heat energy is i.e. side by side inwards arrow marked position input from the hot junction of below, make the vaporization of being heated of the working medium at heat pipe 1 inner bottom place, steam is under the effect of pressure reduction, upwards advance to the heat pipe cold junction and be arrow side by side outwards marked position emit heat energy and be supplied to load and be condensed into the cold junction of liquid below under Action of Gravity Field, being back to, in the vaporization of again being heated of hot junction working medium ..., constantly circulation realizes the two phase flow heat transfer circulation thus.Heat pipe has excellent heat-transfer capability, heat flow density ability to transform and isothermal characteristics.If 100 watts of heat pipe 1 hot junction inputs, then its cold junction output is the highest can reach 97 watts even higher.

If attempt heat pipe 1 to Fig. 4 only from following input heat energy, and do not take heat energy away, then heat pipe 1 steam inside is pressed and can sharply be risen.If heat pipe 1 adopts water as working medium and abundant, then when heat pipe 1 temperature reached 230 ℃, inner maximum pressure can reach 28.53 atmospheric pressure.

If attempt the from top to bottom comprehensively heating and take out heat energy from following a section of whole heat pipe 1 length 3% of accounting for that for example begins from the bottom a little more than heat pipe 1 bottom local of the heat pipe 1 of Fig. 4, namely only make position that the bottom accounts for heat pipe 1 total length 3% forward simultaneously as overlapping cold junction, then the vapour pressure of heat pipe 1 inside can drop to the saturated vapor pressure corresponding with the temperature of following cold junction.When for example water is as working medium, 100 ℃ of the temperature of maintenance heat pipe 1 following overlapping cold junction, even then top other parts are heated to 230 ℃, because the liquid refrigerant of heat pipe 1 inside all is collected in described overlapping cold junction, heat pipe 1 hot junction above except described overlapping cold junction is not owing to there being working medium to replenish whole drying up, and the two phase flow heat transfer mechanism has not existed.The steam pressure of heat pipe 1 inside 1 atmospheric pressure of also only having an appointment.

An example of overlapping cold junction be thermotube wall with absorbing film, absorb sunshine and input as heat energy, connect described thermotube wall with the Thermal Conduction Equipment low thermal resistance simultaneously and heat energy shifted.

Thisly make that heat pipe 1 is in tilted layout, heat energy is inputted and only perhaps do not had what meaning with following a bit of design as overlapping cold junction in other occasions above heat pipe 1, but the empty sun protection that is used for solar collection element, because only need minimum a part of heat radiation power---when this part heat radiation power was used for guaranteeing that air drying occurs, the peak of the initial stage inside heat pipe vapour pressure that the empty sun protection device begins to work was no more than setting value; This part heat radiation power also is greater than described overlapping cold junction as the heat energy input power in hot junction---thus have advantages of radiating element volume compact, dependable performance, heat radiation power little, on the venting of vacuum heat-insulating layer less, on absorber to block impact little and can utilize the heat collecting element tail end as heat dissipation interface.

Can see, the needed heat radiation power of less, the described empty sun protection device of the area of overlapping cold junction is also less, more favourable.Actual heat collecting element needs the device of tail box and so on to settle.The tail box can hide the tail end of heat collecting element.The part that is hidden by the tail box does not belong to overlapping cold junction.Why also can use overlapping cold junction; be because some heat collecting element empty sun protection device relatively be fit to be installed on vacuum heat-insulating layer drum-shaped section or; heat collection element cover glass pipe is with necking segment and be to adopt to assemble inner glass tube after necking segment forms, and then draws tail pipe to be called for short the technique of post-tensioning tail pipe to cover glass tube circle envelope.If the round end-blocking that post-tensioning tail pipe technique forms is not suitable for heat radiation, dispel the heat from described round end-blocking cover glass tube drum-shaped section up with regard to needing to utilize.Heat pipe or the inner glass tube end section corresponding with described drum-shaped section belong to overlapping cold junction.

China's 912050845 utility model electric cooker automatic magnetic temperature detect switch (TDS)s have been introduced a kind of pyromagnetic force inverting element operation principle of utilizing.

Summary of the invention

The purpose of this utility model is the vacuum heat collecting device that will provide with straight tube decompression empty sun protection device.

The technical scheme in the invention for solving the technical problem: make one with the vacuum heat collecting device of straight tube decompression empty sun protection device, comprise vacuum heat collection element, adiabatic water tank or connection collection box, tail box, support and auxiliary with straight tube decompression empty sun protection device.Vacuum heat collection element with straight tube decompression empty sun protection device forms by a straight tube decompression empty sun protection device is set in the vacuum heat-insulating layer of all-glass vacuum thermal-collecting tube tail end; Straight tube decompression empty sun protection device is by with being in transmission connection with the thermodynamic-driven device of heat collecting element inner glass tube heat transfer linkage interface, with the thermodynamic-driven device or forming with the integrally manufactured heat straight-tube of thermodynamic-driven device.Described empty sun protection device has two kinds of stable states: heat straight-tube is stretched out the unlatching heat conduction state that conducts heat when connecting the cover glass tube tail end; Heat straight-tube the adiabatci condition of closing when connecting the cover glass tube tail end of not conducting heat of retracting; Described thermodynamic-driven device comprises temperature-sensitive permanent-magnet steel driving element, bimetallic strip driver spare, memory alloy actuator spare and bellows driving element.Directly or by a heat sink be connected with one-dimensional movement pair low thermal resistance between heat straight-tube and the inner glass tube tail end; Heat straight-tube can move forward and backward along the heat collecting element direction of axis line; The outer end shape of heat straight-tube and cover glass tube tail end inner surface match.

Can also make described cover glass tube tail end inner surface low thermal resistance connect a heat radiation paster, the heat transfer state of heat radiation paster and heat straight-tube changes according to the state of thermodynamic-driven device.

Can also make described thermodynamic-driven device comprise a temperature-sensitive permanent-magnet steel and a soft iron; The temperature-sensitive permanent-magnet steel is connected with the inner glass tube low thermal resistance by thermal conductance; Soft iron is tied and can moves forward and backward and be in transmission connection by transmission steel wire and heat straight-tube along the heat collecting element direction of axis line.

Can also make described heat collecting element tail end for from heat collecting element tail end bottom outer surface, being no more than the part of heat collecting element total length 6% forward.

The beneficial effects of the utility model: the described heat collecting element of the vacuum heat collecting device of the utility model band straight tube decompression empty sun protection device is connected with the plug-in type adopting heat pipes for heat transfer that inserts its inner glass tube inner chamber, consists of one with the plug-in type heat-tube vacuum heat collecting element of straight tube decompression empty sun protection device.Vertical or when being in tilted layout thermal-arrest when described plug-in type heat collector tube element; just can adopt the heat radiation of place, opposite heat tube bottom to collect the inside heat pipe two phase flow heat transfer was located, blocked to liquid refrigerant in bottom, heat pipe hot junction empty sun protection design, the needed heat radiation power of empty sun protection can reduce greatly.For example: a glass heat pipe heat collecting element of exporting 70 watts, 3 milliliters of working medium filling weights.Employing dispels the heat to prevent the technical scheme of heat pipe bombing at the uniform controlled heat transfer path of heat pipe hot end surface, the heat radiation power of controlled heat transfer path is 40 watts, the inside heat pipe temperature is the highest to be also had more than 150 ℃, and corresponding water vapor pressure still can reach the voltage endurance capability that 4.8 atmospheric pressure exceed 58 millimeters of external diameters, 1.8 millimeters inner glass tubes of wall thickness.The utility model is for the heat collecting element of 70 watts of same outputs, and decompression empty sun protection heat transfer path only needs 10 watts of heat radiation powers, just can absorb the water of described plug-in type inside heat pipe when air drying occurs with the speed of 0.25 ml/min.Air drying began approximately after 6 minutes, although the temperature of plug-in type heat pipe raises approximately 30 ℃ at that time, plug-in type heat pipe hot junction inner except the place, bottom all dry, vapour pressure less than 1.5 atmospheric pressure.The heat radiation power of saving 30 watts makes cost that larger reduction is arranged, and the minimizing heat transfer path increases substantially venting 75% and the reliability of vacuum heat-insulating layer.Key is the bombing problem that can effectively solve major diameter insertion type glass heat pipe.The utility model adopts a small-power empty sun protection device just can guarantee that plug-in type inside heat pipe water vapor pressure is no more than 2 atmospheric pressure all the time, and does not affect the normal operation of heat collecting element fully.

Straight tube vacuum heat-pipe heat collecting element decompression empty sun protection device adopts two temperature-sensitive permanent-magnet steel driving elements uniform; minimumly can replace original four paws jump ring with a wire circlip; increase again two blocks of temperature-sensitive permanent-magnet steels, two blocks of soft irons, two springs, two transmission steel wires, a temperature-sensitive permanent-magnet steel thermal conductance with shading, 10 parts of a heat straight-tube, and connect described parts with the high thermal resistance of wire circlip.Simple for structure, easy to assembly.

Temperature-sensitive permanent-magnet steel driving element high conformity, good reproducibility, control accuracy are high, long service life, performance are satisfactory.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is that a vacuum heat collecting device with straight tube decompression empty sun protection device is faced structural representation.

Fig. 2 be one with TV structure schematic diagram on the vacuum heat collecting device of straight tube decompression empty sun protection device.

Fig. 3 is that Fig. 1 looks the sectional structure schematic diagram on the left side at heat straight-tube 7 places.

Fig. 4 is the light-pipe structure gravity assisted heat pipe structural representation of a tiltably-mounted.

1. heat pipes among the figure; 2. cover glass tube; 3. inner glass tube; 4. heat radiation paster; 5. heat sink; 6. temperature-sensitive permanent-magnet steel driving element; 7. heat straight-tube; 8. temperature-sensitive permanent-magnet steel; 9. soft iron; 10. thermal conductance; 11. shadow shield; 12. plate washer; 13. transmission steel wire; 14. spring; 15. adiabatic water tank; 16. tail box.

The specific embodiment

Fig. 1, Fig. 2 and Fig. 3 provide embodiment of the utility model.

Among Fig. 1 to 3, form one with the vacuum heat collecting device of straight tube decompression empty sun protection device with a vacuum heat collection element with straight tube decompression empty sun protection device, adiabatic water tank 15 and tail box 16.Vacuum heat collection element with straight tube decompression empty sun protection device is made by a straight tube decompression empty sun protection device is set in the vacuum heat-insulating layer between all-glass vacuum thermal-collecting tube cover glass tube 2 tail ends and inner glass tube 3 tail ends.Straight tube decompression empty sun protection device forms with heat radiation paster 4, heat sink 5, temperature-sensitive permanent-magnet steel driving element 6 and heat straight-tube 7.The shape of heat radiation paster 4 outer surfaces and the shape of cover glass tube 2 tail end inner surfaces match.0.22 millimeter of heat radiation paster 4 thickness, 40 millimeters of width.Heat radiation paster 4 usefulness jump rings overlay in cover glass tube 2 inwalls.0.22 millimeter of heat sink 5 thickness, 40 millimeters of width.Temperature-sensitive permanent-magnet steel driving element 6 comprises a temperature-sensitive permanent-magnet steel 8 and a soft iron 9; Temperature-sensitive permanent-magnet steel 8 is connected with inner glass tube 3 low thermal resistances by thermal conductance 10; Be provided with shadow shield 11 above the temperature-sensitive permanent-magnet steel 8, prevent that the temperature-sensitive permanent-magnet steel 8 of sunshine direct projection in being in vacuum heat-insulating layer from making its misoperation.Soft iron 9 is subjected to both sides plate washer 12 constraint can do to move forward and backward and be in transmission connection by transmission steel wire 13 and heat straight-tube 7 along the heat collecting element direction of axis line, and soft iron 9 is subjected to spring 14 thrust to pushed away from permanent-magnet steel 8 or has the trend that pushed away from permanent-magnet steel 8.0.22 millimeter of heat straight-tube 7 thickness, 40 millimeters of width.Adopt one-dimensional movement auxiliary structure low thermal resistance to be connected between heat straight-tube 7 and the heat sink 5, heat straight-tube 7 can be done stretch out retraction along the heat collecting element direction of axis line and be moved forward and backward.Heat sink 5 parcel low thermal resistances connect inner glass tube 3 tail ends and overlay on inner glass tube 3 with jump ring.The outer end shape of heat straight-tube 7 matches with heat radiation paster 4 inner surfaces.0.22 millimeter of thermal conductance 10 thickness, 20 millimeters of width, be rolled into tubular.

The making material of heat radiation paster 4, heat sink 5, heat straight-tube 7 comprises steel plate, aluminium sheet and copper coin.

The operation principle of Fig. 1 to 3 embodiment: connect a plug-in type heat pipe at all-glass vacuum thermal-collecting tube inner chamber low thermal resistance and consist of a plug-in type heat-tube vacuum heat collecting element; when the heat collecting element that described decompression empty sun protection device is installed normally is in tilted layout and be not in the air drying state; sunshine is converted to heat energy at inner glass tube 3 absorbing films, and heat energy passes to plug-in type heat pipe 1 internal working medium by inner glass tube 3 and makes it vaporization.Because plug-in type heat pipe 1 cold junction temperature is lower than 95 ℃, working substance steam flows to the cold junction heat release and condenses into that liquid returns the hot junction under Action of Gravity Field and the vaporization of being heated once again under differential pressure action ... so go round and begin again and realize the two phase flow heat transfer circulation.At this moment; temperature-sensitive permanent-magnet steel 8 temperature that are connected with inner glass tube 3 low thermal resistances by thermal conductance 10 do not reach the loss of excitation temperature; temperature-sensitive permanent-magnet steel 8 holds soft iron 9 with heat straight-tube 7 past Zolas, makes heat straight-tube 7 not contact the heat radiation paster, and empty sun protection device is in closes adiabatci condition.The normal thermal-arrest of heat collecting element.Dotted line represents that the retraction of heat straight-tube 7 outer ends does not contact the position when dispelling the heat paster 4 among the figure.

When heat collecting element is in the air drying state; temperature-sensitive permanent-magnet steel 8 temperature rising magnetic force disappear; spring 14 is pushed soft iron 9 and heat straight-tube 7 to the right side; heat straight-tube 7 is stretched out conduct heat and connect heat radiation paster 4; empty sun protection device is in the heat conduction state of opening, and by inner glass tube 3 tail end tube walls the heat energy in described plug-in type heat pipe 1 hot junction is lost to environment continually by empty sun protection device.The steam of plug-in type heat pipe 1 inside flows to bottom place and condenses and be collected in the place, bottom under differential pressure action, clamp down on plug-in type heat pipe 1 internal pressure and be in all the time low level, guarantees that described plug-in type heat collector tube element can bombing do not realize the empty sun protection of heat collecting element.

Heat collecting element breaks away from the air drying state later on, and temperature-sensitive permanent-magnet steel 8 temperature reduce magnetic force to be recovered and attract soft iron 9 heat straight-tube 7 to be retracted do not conduct heat to connect heat radiation paster 4, and empty sun protection device is in closes adiabatci condition, and described heat collecting element can work again.

Fig. 1 to 3 embodiment does not adopt heat radiation paster 4 and heat sink for the plug-in type heat pipe full glass vacuum heat collection element of cover glass tube diameter 70, inner glass tube diameter 58, and the heat radiation power of described empty sun protection device also can reach more than 10 watts.

The temperature-sensitive permanent-magnet steel driving element 6 that Fig. 1 is connected with Fig. 2 changes bimetal leaf thermodynamic-driven device into or changes memory alloy actuator spare into or change into heat straight-tube 7 being stretched out conducting heat and connect, and working medium is locked in the empty sun protection mechanism that place, bottom, plug-in type heat pipe 1 hot junction realizes 1 inner pressure relief of plug-in type heat pipe.

Claims

1. with the vacuum heat collecting device of straight tube decompression empty sun protection device, comprise vacuum heat collection element, adiabatic water tank or connection collection box, tail box, support and auxiliary with straight tube decompression empty sun protection device; Vacuum heat collection element with straight tube decompression empty sun protection device forms by a straight tube decompression empty sun protection device is set in the vacuum heat-insulating layer of all-glass vacuum thermal-collecting tube tail end; Straight tube decompression empty sun protection device is by with being in transmission connection with the thermodynamic-driven device of heat collecting element inner glass tube heat transfer linkage interface, with the thermodynamic-driven device or forming with the integrally manufactured heat straight-tube of thermodynamic-driven device; Described empty sun protection device has two kinds of stable states: heat straight-tube is stretched out the unlatching heat conduction state that conducts heat when connecting the cover glass tube tail end; Heat straight-tube the adiabatci condition of closing when connecting the cover glass tube tail end of not conducting heat of retracting; Described thermodynamic-driven device comprises temperature-sensitive permanent-magnet steel driving element, bimetallic strip driver spare, memory alloy actuator spare and bellows driving element, it is characterized in that directly or by a heat sink being connected with one-dimensional movement pair low thermal resistance between heat straight-tube and the inner glass tube tail end; Heat straight-tube can move forward and backward along the heat collecting element direction of axis line; The outer end shape of heat straight-tube and cover glass tube tail end inner surface match.

2. according to heat collector claimed in claim 1, it is characterized in that described cover glass tube tail end inner surface low thermal resistance connects a heat radiation paster, the heat transfer state of heat radiation paster and heat straight-tube changes according to the state of thermodynamic-driven device.

3. according to heat collector claimed in claim 1, it is characterized in that described thermodynamic-driven device comprises a temperature-sensitive permanent-magnet steel and a soft iron; The temperature-sensitive permanent-magnet steel is connected with the inner glass tube low thermal resistance by thermal conductance; Soft iron is tied and can moves forward and backward and be in transmission connection by transmission steel wire and heat straight-tube along the heat collecting element direction of axis line.

4. according to heat collector claimed in claim 1, it is characterized in that described heat collecting element tail end is for being no more than the part of heat collecting element total length 6% forward from heat collecting element tail end bottom outer surface.