CN1553122A

CN1553122A - Solar water heater

Info

Publication number: CN1553122A
Application number: CNA031371043A
Authority: CN
Inventors: 孟范中
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-06-04
Filing date: 2003-06-04
Publication date: 2004-12-08
Anticipated expiration: 2023-06-04
Also published as: CN1318809C

Abstract

A solar energy water heater applies vacuum and heat insulation screen technique to increase insulation function of water storage tank so its transmission heat resistance is 4.4 times higher than normal ones, piping circulation pump is applied in circulation piping to increase forced heat transmission of water heater. The structured used in the present invention is as the follows: mouthes are opened at both of left and right end faces of water tank and to connect them with circulation pipe connected to heat collection assembly pipe which is connected to vacuum heat collection pipe so openings on water tank are dereased by 80-90% comparing with original ones.

Description

Solar water heater

Technical field

The present invention relates to a kind of heat-insulation and heat-preservation, augmentation of heat transfer and antifreeze deblocking technology technology of solar water heater.The vacuum storage tank of the technical program also can be used for the heat preservation storage water tank of large-sized solar collecting system except that the poly-ammonia quality guarantee temperature storage tank that substitutes present solar water heater; Augmentation of heat transfer and antifreeze plugging technique can be with the collecting systems of common monomer solar water heater and large-sized solar.

Background technology

The water tank of the solar water heater stored hot water that existing market is used adopts certain thickness poly-ammonia matter integrated foaming heat preservation.To the heat insulation effect of water tank, I observed through continuous several days, and observation water tank hot water temperature data statistics sees following table for details:

The solar water heater water tank hot water temperature changes statistical form

Place: Liaoning Panjin weather: fine

Time	On May 3rd, 2003														On May 4th, 2003
	On May 3rd, 2003														On May 4th, 2003			??5:00	??6:00	??7:30	??9:00	??10:00	??11:00	??12:00	??13:30	??14:15	??16:15	??16:50	??18:20	??20:15	??23:00	??4:00	??7:15	??10:00
	Temperature (℃)	??79	??78	??77	??76	??75	??78	??83	??89	??92	??91	??91	??90	??87	??84	??79	??76	??5:00	??6:00	??7:30	??9:00	??10:00	??11:00	??12:00	??13:30	??14:15	??16:15	??16:50	??18:20	??20:15	??23:00	??4:00	??7:15	??10:00	??75

The data of statistical form show that minimum temperature every day of observation in continuous 29 hours occurs in 10:00 in the morning, and maximum temperature occurs in 14:15.The time that the solar water container water temperature raises within one day has only 4.25 hours, accounts for 17.7% of total time on the one, and 82.3% time water tank is to the atmosphere heat release, and makes the hot water temperature in the water tank descend 17 ℃.Statistical form has shown the situation of change of handling up of solar water heater hot water heat energy within one day clearly, absorbs heat daytime and heats up rapidly, afterwards for a long time to the atmosphere heat release.If in the winter time or the cloudy solar water heater water tank water temperature heating-up time can be shorter, and the water temperature in the water tank also can descend sooner.Obviously in Various Seasonal, the data of the above-mentioned observation of solar water heater of different regions and different model can be different, but above-mentioned universal phenomenon is all set up in different regions.

The purpose of this invention is to provide a kind of high-performance attemperater for this reason, and then weaken solar water heater water tank hot water the atmosphere heat release.In addition in the solar water heater that existing market is used, the circulation of water is the density contrast Natural Circulation by water, circulation rate is less, heat transfer rate is less during intensification, set up a kind of pipe circle pump in the solar water heater circulatory system for this reason, augmentation of heat transfer in the heating-up time, and then increase substantially its heat absorption efficient, the gap was moved this pump can to prevent that again pipeline from freezing stifled winter.

Summary of the invention

To achieve the object of the present invention, the present invention can adopt vacuum to add the heat screen technology by the attemperater heat-insulation layer protosun, increases considerably the thermal-conduction resistance that water tank externally conducts heat.Calculating shows that thermal insulation layer only adopts the vacuum heat-insulation technology, and total thermal-conduction resistance only increases by 2.2 times, adopts heat screen to hide thermal technology in the thermal insulation layer again, and then total thermal-conduction resistance rises to 4.4 times of former thermal resistance.For reducing the welding difficulty, vacuum heat collection pipe does not directly link to each other with water tank, and links to each other with the vacuum header, and the vacuum header is connected by the plane opening of height circulation pipe water tank end again, change original cylinder welding into the end plane welding like this, thereby strengthen the weld seam reliability.This practice not only makes opening in the water tank and weld seam quantity and former regular solar water heater relatively reduce 80% to 90%, and the focus quantity that water tank externally conducts heat is also reduced more than the 80-90%.

Description of drawings

Below in conjunction with accompanying drawing the present invention is described in further detail

Fig. 1 is a section of structure of the present invention.

Fig. 2 is the structure scheme of installation of pipe circle pump assembly [1].

As shown in Figure 1, the present invention has pipe circle pump assembly [1], water tank end gland [2], high circulation pipe [3], outer garden tube [4] with one heart, the getter of thermal insulation layer [5], high circulation pipe connector [6], interior garden tube gland [7] with one heart, O type cushion rubber [8], heat screen [9], lean type layer [10], interior garden tube [11] with one heart, water tank outermost layer garden tube [12], heat screen drag reduction hole [13], poly-ammonia matter heat-insulation layer [14], low circulation pipe joint [15], water water pipe [16] up and down, water level display [17], escape pipe [18], concentric tube end, garden gland [19] in right, heat screen centering ring [20], outer garden heat-insulating shield [21] with one heart, outer garden tube with one heart can weld Circular Plate [22], low circulation pipe [23], thermal-collecting tube header [24], O type cushion rubber [25], right outer garden tube with one heart can weld garden plate [26], vacuum heat collection pipe jack [27], vacuum hole [28], thermal-collecting tube header heat-insulation layer [29], the outer garden tube gland [30] with one heart in a left side.

The opening of water tank is total everywhere among Fig. 1, left end 1 place, right-hand member 3 places. Water water pipe [16] and escape pipe [18] position relative altitude are placed in the water tank topmost up and down, purpose be as far as possible not with water tank in hot water directly contact, and then the hot water that weakens water tank outwards conducts heat. Outer with one heart two ends, the cylinder left and right sides, garden gland forms a plectane by bi-material, with the material selection stainless steel material of concentric garden plate weld, soldering reliability is good, non-weld employing heat-insulating material increases heat transfer resistance.

High circulation pipe [3] position among Fig. 1 is a little more than low circulation pipe [23], and purpose is pipe circle pump assembly [1] when not working, and also can utilize the density contrast of water to produce the nature circulation. Heat screen [9] is provided with several circular holes, is heat screen drag reduction hole [13], and purpose is that the air of taking out the true time heat-insulation layer is convenient to flow, and thermal insulation layer just forms higher vacuum within a short period of time. Left outside concentric garden cylinder gland [30] is with getter [5], and purpose is the vacuum that keeps in the thermal insulation layer.

All weld seams all adopt the argon arc welding among Fig. 1, and postwelding is formulated the pressure test process operational procedure, makes all soldereds of thermal insulation layer at 0.3M _PaNon-leakage under the pressure.Circulation pipe and the outermost chain-dotted line of thermal-collecting tube header are represented the most external heat-insulation layer.

The outlet pipe of pipe circle pump is connected with solar water container and adopts inserting mode to connect in Fig. 2, and being connected of high circulation pipe [3] of Fig. 1 adopts the flange mode to connect.Pipe circle pump realizes sealing and enhanced feature by mechanical seal.Fig. 2 has provided 4 main parts size of pipe circle pump assembly [1], and these 4 part parts are respectively: tubing pump motor (1), tubing pump oil sealing (2), tubing pump blade (3), tubing pump outlet pipe (4).

By its operation of control of designing program, controller is provided with the normal run indicator of pipe circle pump assembly [1], is convenient to grasp its normal operation conditions by indoor multifunctional controller in the operation of pipe circle pump assembly [1].

The specific embodiment

Pumped vacuum systems one-level pump adopts sliding vane rotary pump, and two stage pump adopts lobe pump to become diffusion pump.Once take out many heat-preservation cylinders.The garden tube can weld the copper pipe that is welded with certain diameter on the garden plate [26] in advance with one heart outside the right side, and this copper pipe connects the vavuum pump unit.The material of making heat screen [9] adopts coefficient of blackness less than 0.04 metal material, oil removing oven dry before the reels of material.Interior garden tube [11] with one heart of manufacturing and outer concentric garden tube [4] material also must degrease to dry and handle.In the outer garden tube gland [30] with one heart in a left side, the left side with one heart garden tube gland [7], tube end, garden gland [19], outer garden tube with one heart can weld garden ring flat-plate [22] with one heart, right outer garden tube with one heart can weld garden plate [26] by design line opening in right, and then the garden tube [11] and the axiality of concentric garden tube [4] outward with one heart in guaranteeing.

Interior garden tube is with one heart made

When the garden tube is made with one heart in Fig. 1 structure with part [6], part [7], part [19], part [16], part [17], part [18], part [15], with part [11] assembly welding finish the back to inner core with pressing 0.3M in the gas examination _PaWeld seam is non-leakage to be qualified.Unnecessary opening blocks during pressure testing, only stays 1 opening to connect hydraulic test pump.Go up spiral this aluminium foil of winding aluminium foil at the qualified interior concentric garden tube [11] of pressure testing and be lean type layer [10].Put heat screen drum and that have drag reduction hole [13] [9] afterwards more thereon, the two ends of heat screen [9] are fixed with heat screen centering ring [20].

Outer garden tube is with one heart made

The interior concentric garden tube of making is put into outer garden tube [4] with one heart, after welding part [18], part [15], part [16], part [6], part [11], part [30], part [4] well by aperture position shown in Figure 1, weld the copper pipe place in advance at vacuum hole and meet hydraulic test pump gas pressure testing 0.3M _Pa, weld seam does not leak for qualified.

Vacuumize

Once take out many concentric garden tubes by the flow process that designs, when the reading of vacuum meter less than 0.5 _PaThe time, with again that sealing place weldering is dead behind the instrument sealing copper pipe.

Concentric garden tube external insulation layer is installed

Press Fig. 1 position poly-ammonia matter heat-insulation layer [14], poly-ammonia matter heat-insulation layer [14], water tank outermost layer garden tube [12], water tank end gland [2] are installed.

By Fig. 1 position high circulation pipe [3], pipe circle pump assembly [1], thermal-collecting tube header [24], low circulation pipe [23] and heat-insulation layer [29] thereof etc. are installed.The solar water heater remainder is installed identical with the regular solar water heater.

At non-icing area in China's winter pipe laying circulating pump assembly [1] not, and then form the serial solar product of different costs.The mounting means of tubing pump and circulation pipe is diversified in addition, in the circulation line of Fig. 1 structure, a kind of connectivity scenario of O type cushion rubber inserting mode is provided, but also can not limit this kind connectivity scenario, also can adopt the flange mode to connect in the junction, just adopt flange connection as the technical program pipe circle pump and high circulation pipe [3].

Beneficial effect

170 liters solar water heater and regular solar water heater relatively increase the materials such as one deck stainless steel insulation letter, pipe circle pump assembly, increase about 500 yuan of cost. Former regular solar water tank every day water temperature descends 17 ℃, thermal resistance is original 4.4 times after the employing present technique, temperature-averaging only descends 4 ℃ to estimate every day in every year, then water tank temperature improves 13 ℃, adopt the pipe circle pump augmentation of heat transfer in addition, the water temperature of water tank is estimated to improve 4 ℃ than original, and then the water temperature of water tank is final improves 17 ℃. With annual every day average heat production water 120 kg calculate, then every day fecund to give birth to heat be 120 kg/sky * 1 kilocalorie/kilogram ℃ * 17 ℃=2040 kilocalorie/sky=8527.2kJ/ days. 1 degree electricity=860 kilocalories=3595kJ, amounting to economize on electricity every day is: 8527.2kJ/ days ÷ 3595kJ/ degree=2.37 degree/skies, 0.61 yuan of every degree electricity, then save 1.45 yuan of RMB every day, saved 1.45 yuan/day * 365 days/year=529.6 yuan/year of RMB in 1 year, the solar water heater infusion of financial resources is just recoverable less than 1 year. No-failure life estimated 8 years by solar water heater, then the very considerable economic benefit of wound.

Claims

1, a kind of solar water heater, it comprises the pipe circle pump assembly, high circulation pipe, low circulation pipe, concentric garden tube gland, the thermal-collecting tube header, interior garden tube with one heart, outer garden tube with one heart etc., it is characterized in that on the interior garden tube [11] with one heart, spiral winding one deck aluminium foil, be lean type layer [10], put heat screen [9] more thereon, heat screen [9] two ends are fixing with heat screen centering ring [20], again outer garden tube [4] with one heart is enclosed within on the heat screen [9], with one heart tube two ends, garden are with concentric garden tube end face gland welded closure, and the vacuum hole [28] that concentric circles can weld on the garden plate [26] outside the right side is located to vacuumize, high circulation pipe [3] and low circulation pipe [23] connect high circulation pipe joint [6] and low circulation pipe joint [15], the height circulation pipe is connected with thermal-arrest header [24] again, and the thermal-arrest header is connected with vacuum heat collection pipe.

2,, it is characterized in that heat screen [9] is provided with several heat screen drag reduction holes [13] according to claim 1 described solar water heater.

3,, it is characterized in that high circulation pipe [3] is provided with pipe circle pump assembly [1] according to claim 1 described solar water heater.