DE8021762U1 - HEAT EXCHANGER WITH HEAT TUBES AND INTEGRATED BYPASS FLAP - Google Patents

Description

egg from '"' sheet '5 ' ■ · '' .. ' Dlpl.-Ing. Q. Schllebe

4a · German Patent Office, MUaahen patent attorney

The invention relates to a heat exchanger with heat pipes, di · in horlaentales ·, gisacierter or vertical lag · in A frame is arranged, sar Rüekeewinaunf by Xaorglo from ν · »» exhaust air ducts la ventilation systems.

Wlraerehre (Heat Pipes) are a facility of sun Wlracenorgletransport by eiaea varaeabgelMndon on a «Krae- «Ttiaaaaaadea Haeaeaetroa. Therefore, a · barometer rer- •• aleaen There is a fluid flowing through the pipe Terdaapfea at the warn HRlfte and darch Kendeneieren the cold half of the pipe · stXndlg Wlrae from one Surpasses the other. The slight inclination of these pipes from varaen lade supports the reflux of this condensate by gravity, so that the optiasle effect is achieved.

1 $ When installing Wlnaerohr-Vlreetmuechern la KHnaanlagen on the exhaust air side (warning side), moisture is then separated out at the outer »surface of the warmth, if the dew point of the finished air is higher than the surface temperature the honor of honor, which with certain betrayals with very cold outside air (below -19 ° C) you can be below 0 ° C Bisansatz must be defrosted periodically, otherwise the air flow through the addition of the VMraetaueehers old bis was interrupted.

According to the stand of Zeehnlk, defrosting is carried out by a

Air flap la outside air duct la StrSaungsrlohtung in front of the Outer air part of the heat exchanger achieved in combination *) into an air bypass that closes off the outside air Aueealuftteil aa Vttraetauseher drives past · This AuOenluft

with an air damper

Letter from "'' Blatt '" 4 "' 'Dlpl.-Ing.G. Schliebs

an da · DeUtSChO patent office, ÜUnOlUm patent attorney

also, because the heat exchanger does not have a warming up of the outside air heard more, about a susltsliehen Verhitaer to be heated

The exhaust air side can defrost because the outside air side is shut off The surface temperature should rise above 0 ° C is and the Elsanaats thaws with it · XML · ·· arrangement required susttsllehen Plats for the bypass, which is via the air duct must be changed and connected. The inevitable unfavorable consolation ratios result in suettsliohe Laftwideretfind. The air-side resistance dec Wlraetauaeners on the FortLuftaeit · lies «SJunmd dee gaaxen Jan * ree gate, connected with the energy demand for eatapreohenden the fan, the required preheater needs the most expensive Spitienlmst-Knergie, as the icing is just starting will occur on the coldest days.

Bar the invention is therefore rounded off the task of finding an arrangement with which you can avoid these disadvantages and the sn «rgi« bilans is improved over the course of the year.

This object is achieved according to the invention in that in the frame of the heat exchanger · on the Portlufteelt · and on the outside of the Wir ** t * uSöe * rs 3 «a bypass valve are arranged, the «islands are adjustable. The two flaps, dl · in the open position within the Wtrm «t« usher a bypass for the respective air flow release, know oneness to be set. For this purpose, the two are in an advantageous simple arrangement Flaps arranged coaxially, and one flap is through • in · shaft, the other flap is on the same due to one

Axle at the end of the hollow shaft is adjustable.

Letter from to

BIaV

the German Patent Office, Munich

Dlpl.-Ing. G. Schliebs

Patent attorney

Brfindungsgeaftii is not only brought about the defrosting on days old Kisanaat level susätsliehen structural effort on the ventilation system »but in particular also the resistance of the outside air and exhaust air · of the Wttr-Botausehers on the days of the year (approx. 30 % · 3000 hours« the per year) "when a Väraertlek profit is not necessary or because of the small difference in tea temperature" between meadow air and exhaust air is not economical, all of this is considerably reduced ·

s w & »

The following outlines the invention and its advantages Examples explained · Point Xn in the drawing

Fig. 1 * 3 Fig. 4 Fig. 5 Fig. 6

grundsttsliehen the three types of ventilation systems in Lwftführung ι a longitudinal section through a WMraerohr ~ WlnBetauseher and a Teilquersehnitt duroh the War BMitauscher of FIG. k \ on an enlarged "MaSetab storage and operation of the flaps of the Wirsetauaehera.

In FIG. 1, the ventilation duct 1 leading the varsenous air stream is arranged at the bottom and the outside air duct 3 guiding the cold air stream is arranged at the top the WKmercihre Xm Rahaen 2 des Wlrmetauaehers 4 are vertical «

Fig. 2 shows horizontally arranged channels 1, 3 for the exhaust air or the like. Exhaust air triimej the exhaust pipes are generally 2 horixontal, with a slight inclination »arranged one above the other ·

Letter from: ■ ■. _{B | ätf} . , g ... .. Dlpl.-Ing. G. Schliebs'

to dft «DCUtSChO Patentamt ₍ MUnOhWl patent attorney

3 shows channels 1, 3, 1, 1, which are led perpendicularly next to one another for the air flow * f here, too, the heat pipes are essentially horizontal, but next to each other.

• Figures 4 and 5 show the heat exchanger 4 open and in

5 a longitudinal section, and one recognizes in the frame 2 the two

J den duroh a middle wall 3 for the two air streams AL

|; and FL separate compartments 4.1 and 4.2. Bas bundle of heat

tube 6 runs through both compartments, but does not take up the entire cross section of the heat exchanger. Rather is

| j 10 by a further partition 7 each a lateral bypass

separates, in each of which a (bypass) valve 8, 9 is arranged

The two bypass flaps »8 and 9 are therefore next to the heat»

more tubes 6 integrated into the frame 2 of the heat exchanger 4, so that the unit can be installed in the ventilation ducts 1, 3 without requiring additional space or mounting costs on the site.

Xb Flg. 6, the bypass flaps 8 UBd 9 and their drive are shown in detail in relation to FIG Another wall 14 is guided for the lower flap 9 and levers 15 and 16 with which the flaps correspond are seated in a further ball bearing 13 g · - 1 »* ·]» *, Aa the shafts protruding from the frame Z. The operating mode can be designed.

Bas procedure mm operation of such a heat exchanger with Heat pipe "and integrated bypass valve a is thereby gekenaseiehnet, that to thaw an ice build-up on the exhaust air rarely by heating the surface temperature If the heat pipe * in the exhaust air above 0 ° C, the open air folds 8 is opened while the exhaust air flap 9 is closed

ief from """'Blait ¹ ' · 7" · · '

the German Patent Office, Munich

Dipl.-Ing. G. Love

Patent attorney

remains and to reduce the pressure drop and thus energy loss over both parts of the heat exchanger in

Operating hours to be opened with.

(T _pL - 3

C) both flaps 8, 9

For the three typical operating states during the year, the two flaps are controlled as follows}

1. Winter operation

β and 9 are closed, the heat pipe 6 fully effective.

2. Transitional period and

Summer operation

e.g. T ^ * (TpL - 3 ° C), 8 and 9 are opened, the air currents flow through the bypasses, hence in the heat exchanger only slight pressure drop, i.e. very little additional ventilation energy requirement .

15 3. Control 8 is open, 9 is closed,

Defrosting of any frost build-up on the exhaust air side (when operating with room air humidification) defrosts by heating the heat pipes 6, - Depending on the degree of the

20 egg approach and the temperature and

Humidityx-srhaltaissen kaan die Flap 8 can also only be partially open.

From äer US-PS 4,06A-, 932 an arrangement is known in which 25 of the fiahmen with the heat pipes by means of one in the middle plane of the two channels lying Helle is rotatable, so that at the same time the transmission capacity of the heat exchanger and change its flow rate: with decreasing power to zero (with the frame rotated in the center plane), the

Letter from "'' Blair '& ·' '. ·'" .. 'Dlpl.-Ing. G. Sleeps

_to the German Patent State, Munich patent attorney

Bypass closed up to a full duct cross-section. This should be calibrated also let an ice aneat thaw, but this method is highly ineffective as both parameters are reciprocal linked and not individually selectable.

Claims (3)

Expectations 1. Heat exchangers with heat pipes which are fastened in a horizontal, inclined or vertical position in a frame and extend gas-tight through a partition which forms two separate files with the frame, characterized in that each of the two compartments ( ¹ J ₁ I, 4.2) has a space free of heat pipes in which a pivotable bypass flap (8, 9) is arranged. · 2. Apparatus according to claim 1, characterized in that the pivot axis of the bypass flap (8, 9) extends parallel or perpendicular to the heat pipes (6). 3. Apparatus according to claim 1 or 2, characterized in that the two bypass flaps (8, 9) are arranged coaxially _u nd the one bypass flap (9) by a shaft (I ¹ O, the other bypass flap (8) by one on the same Axis seated hollow shaft (12) is adjustable.