DE1929109U - COOLING UNIT FOR TEMPORARY COOLING OF OBJECTS OF LOW THERMAL INERTIA. - Google Patents

Description

τ α Γ <ττ jS /,.

DIPK-ING. C. WALLACH X £ ξ

15 sheets

MUNICH, DEN I3 ° 3? Ebr · 1963

H 34 305 / 42C Gm _MY «. ·»> .: 5532 - H / st

ΤΗΞ HS HAYIIlAiO AIRCEAFT CukPAifif llkITBD, Hatfield, Hertford-

sliire / Great Britain

Cooling unit for "temporary cooling of objects less thermal inertia

The furnace "concerns the problem of cooling and aims at Creation of a cooling unit that, when actuated, has an in thermal contact with the unit is lower thermal inertia to cool quickly and to keep it at a low temperature for a limited period of time able »

Such an article, for example, a semiconductor detector for infrared radiation be, "To increase the display" sensitivity, it is desirable ₉ preferably to cool the semiconductor to temperatures below OO to a temperature below -3O ⁰ C ,, TJM false indications during the subsequent rise in temperature of the semiconductor to exclude, it is also desirable to maintain the low temperature at least for the duration of the measurement.

The actual keß duration during which the detector on the should be kept low temperature, for example

should be on the order of seconds, and should be accordingly the cooling from the no-grooved ambient temperature to the mentioned Iueß Temperatur only a relatively short time, for example also in the order of seconds, need so that a sharp cooling is necessary within these periods of time «

! fire
Sin loihlaggregat according to / sSKÖSfillg has for this purpose a closed container which is divided into two compartments and which is filled or essentially completely filled with liquid coolant j a connecting line between the two compartments for the coolant? a closed outlet tube leading out of one compartment, a gown for opening the outlet tube outside the container, as well as a liquid flow-preventing packing through which the coolant passes through the outlet tube "

Preferably, the pack in one compartment is made of?; Elchem the outlet tube leads out, housed. Suitable packs consist for example of silica yiolle or glass wool.

The connecting roller preferably has an increased flow resistance, compared to the exit tube. For this purpose the connecting tube can be made narrow along its entire length be or have a narrowing »It can also alternate both types of flow resistance can be provided,

If the front side of one compartment is to be cooled, the connecting pipe can lead from this front side or from a point adjacent to it. In this case it can

End of the connecting tube on this face "be attached and have lateral openings for the coolant to pass through, To avoid spilling or splashing of the liquid coolant to avoid ka.mi the yer "connecting tube to a point in the See you at the front of the one compartment distant front of the other compartment, the outlet pipe can extend from a point in the height of the front of the first compartment,

The container can preferably have a common partition., through which the connecting tube passes «Die The outlet pipe can also go through the common partition passed through »

The device for opening the outlet tube can have a breakable part outside the container »

T / urther advantages and details of the furnace result show% in this from the following description of two embodiments with reference to the drawing

Fig * 1 in longitudinal section an execution sf orsi of a cooling unit

/ Firing

gats according to ^/ SEfiksnnsßrg: in connection with a detector cell

FIG. 2 shows a cross section along the line H-II in FIG. 1

Ii ¹ Ig, 3 a cross-sectional view along the line HI-III of FIG

Pig * 4 is a cross-sectional view along the line IY-IV of ligur 2 and

a ■ -

! ig * 5 a second cross-sectional view 'Hiring

of a cooling unit, according to /

The detector line shown in Figures 1 "to 4 _: has a cylindrical line consisting of two halves 10 and 11". Coating made of an iron-hickel-cobalt alloy on »The part tö-ist kap-; pen-shaped with a closed end 12 and. a radial / flange 13 is formed, which is used to fasten ... the G-cylinder consisting of cooling unit and cell. "Part 1 T is a cylinder that is open at the end and one end of which fits into part TO and with it is sealingly connected with the other end _thereof;?.. a transparent Yerschlußteil 14, completed>sen's electrical leads 15 are circuits using Dichtungsver- passed through the part 10 and 16 having disposed in .the Mhe of the closure part 14 HalTDleiter. -DetektOr connected »

The cooling unit 20 according to the price increase has one of two. ■. cylindrical parts 21 and 22 made of iron-jickel-cobalt alloy containers. Part 21 has a locked one. End 23 and is longer. As well as of slightly smaller diameter:. as the part 22 ,, the part ^: 22 has a closed end 24 ^ the parts 21 and 22 fit into one another and are tightly connected to one another. In the part 21 a metal diaphragm 25 is arranged horizontally - nety which divides the container in two by a common separator. . wall separate compartments 26 and 27 .divided *.:.: - ■■ -.

. . " 5 - ■■■ :;";

A metallic bond tube 28; is tightly closing

guided an opening in the diaphragm 25 and connects the - ■ «ι,:" ■ "■" - ■■ -

two compartments 26 and 27 * Eöhre 28 is f a 13nde with the central part of the inner surface of the front-side shutter 23, the detector is arranged on its outer face, secured at its one another * At one end of the Eöhre 28 is a diametrical slot 29 ( Figures 3 and 4), so that this end of the pipe is not closed there * The other. End . the tube 28 is open and arranged in the midst of the frontal end 24 of the compartment 27,

Lerner also leads, tightly closing, an exit tube 30 through an opening in the diaphragm 25, which ^: an open end in which "■". . Near the end face 23 of the compartment 26 has * In the compartment 27, the tube 30 is bent and in a radial direction by a leu * - ■ -.

silver lining 3i in a circumferential opening of part .22; and a : '/', "

similar, aligned with first chuck: chuck 32 in a scope soff voltage of part 10 out. So is. a ye r ~ '■ - : "", - binding. between the compartment 26 and the room outside the De- :.

detector cell established, with all connections dichtehlies -'-- send carried out. On the one outside the cell. End of the tube 30 is an externally threaded one. Sleeve 33; made of nickel silver attached * Except for ears 28 and 30 "contains. -". the compartment 26 still has a pack 38 made of silica or fflas wool,

One: second pair of aligned ITe silver linings 34.

; ; and 35 (Figures 2 and 4) are in scope so ff openings in the parts.,

10 and 22 arranged * Through this chuck 34 and y35 is tight -.,., ■; finally a short supply line 36 out, which creates a connection between the compartment 27 and the space outside the detector cell * The outside of the. Cell located end., The tube 36 is provided with an externally threaded sleeve 37 "made of nickel silver" * The cooling unit 20 is by means of the -γ - .. γ line 36 and the tube 30 inside the cell. precisely centered and fastened *. "- -. . ^; '- ^: '_.'- ■ ^: ;. . "/; _Y

The binding tube 28 is narrow and the slot 29 is small. um-: to a high resistance for the penetrating Eühimittel,. / form, compared with the relatively low ^ .flow .y resistance of the wide outlet tube 30 *. ^; ■

The. Cooling unit is filled with liquid coolant, with- ";

^{r <i, for} example, with one of the known Eühlmittel with the trade names "Preon 13", "Ireon 22 ^M odeT" Iregn 12 ", which at the pressure prevailing at the time of cooling, at the desired.; ... boiling low EEEMP-erature * 'y \ - _{^{γ;;;.-....:.:.}}

The filling takes place through the supply line. 3ö | once, that _; . Waste ^";: part 27 is filled""is liquid ^ passed through that connection ■■ '. ■ .-' - - tube 28 into the compartment 26 through _# 26 is filled the compartment, so" : ·· '. "

, - "- ^ - liquid exits through drain pipes 30 * The exit -. ^ Tube 30 is then closed with a fragile! Terschluß ^ eil, "-γ

"*" 'for example - in the form of a (not shown) glass piston γ: closed «Likewise, the supply line; locked,*. lun ;;

the container of the cooling unit is 20-sealed and in the essentially equal with liquid coolant under a pressure the vapor pressure of the coolant "at the ambient temperature. .j, filled. The detector cell is evacuated as well as possible ». ■ '■;".

In order to start the cooling of the semiconductor detector, - "the fragile glass bulb is shattered" due to the pressure in the cooling unit 20 and since the: liquid coolant is boiling, a coolant vapor stream immediately emerges through the outlet pipe; 30 from the compartment 26 * - ". ■ '' _ / ' ■'. "" -: - ^: -

This causes a strong and rapid cooling of the forehead part 23:

~ \. of the compartment -26 and that in good thermal contact with it. V located semiconductor body »Further quantities of coolant pass through 'the connecting tube 28 from the .Abteil \ 21 in the Ab—"

.'i. part 26 and from there into the outlet pipe 30 * When the boiling point of the coolant reaches the prevailing pressure. is (ie the desired low temperature to be maintained) _? The coolant evaporates further in the compartment 27, whereby the vapor through the connection tube and the outlet tube ^: exits at a slower rate * The low v: temperature is therefore maintained until / all of the liquid coolant has evaporated. Then the: temperature rises

φ gradually to the ambient temperature,.; / ■;. -

^. . The length of the limited period of time, -during 'which, the 2üh- ■ .'-.' ment is maintained _? is. largely determined by it.,; ■ what amount of coolant in the container after the initial

rapid cooling, which is achieved by * the rapid exit of the cooling. ^; .. is caused by means of the outlet pipe, "In order to retain as much liquid as possible, the coolant should escape in vapor form, the silica - or, glass-wool. packing acts in this direction." - The wool acts as a liquid -. ■ '-.' Baking prevents flow and holds a large part of the liquid **: .- ■■ "'". speed. back, - the without the "fo.llpackung through the discharge _tube:; would be blown out, Selbstverständlichkö ^ can other substances ^ - which are inert to the coolant and the flow of; liquid Mhimitteisj but not the vapor passage ^resistance;; stand oppose. are used * -. .. "- - ':' \

In the embodiment shown in Ligur 5, the De «igt. detector similar to that shown in FIGS. 1 to 4; Parts of the cooling unit., Which are those shown in Figures 1 to 4;>

the same are denoted by the same reference numerals. .:; '

In this embodiment, however, an exit tube _ ..: 40 is tightly closed through an opening in the diaphragm 25 ^:. .--; led and with her / one end in the middle salvation of the. inner 'surface of the end face 25, on the outer surface of which the detector ■:. 'is arranged, attached * A side opening 41 is in, -: -, ·;'. ;; provided that one end of the Eöhre ^ O, so that it is not closed ■ * In the compartment "27""the 40th Eöhre runs bent and is in the radial Elchtung durch.ein leusilberfutter \ _.::. 31 in a peripheral opening of part 22 and a corresponding, with the first .aligned lutter 32 in.a circumference of the opening · -:!;.

tion of the rope 10 * This is a connection between

the compartment. 26 and the space outside the cooling device _{manufacturers.} ..- * ..-.- ■ ■. ■ "-. ■; ~ ■ ■

- Provided, with all connections tightly closing executed -;

The metallic connecting tube 42 is tightly fitting; through :;. guided another opening in the diaphragm 25., and provides establish a connection between compartments 26 and 27 she is - --. · with one end in the middle of the inner surface of the Face 23? on the outside of which the detector is arranged Attached to one end of the tube 42 is a lateral; . Opening 43 is provided so that this end is not "closed."

The other end of the tube 42 is around the exit tube; 40 - ■ f bent in dem'Abteil 27 so that its open end facing away from the end face 23 of the compartment 26 lies in the middle of the Eühlag- / gregats, '"_" ..- ■ ---- / - .

The exit tube 40 and -the. Connecting tubes 42 are - _f to - allow heat exchange, along ¹ , their length with one another. _: . soldered *. : ■; ~ '■. : ■. ';.; ■■ - :. ' ./ _λ ^: / :; .

In addition to tubes 40 and 42, compartments 26 and 27 also contain . Pacloingen 44 and 45 made of ■ silica or. G-las-folle »;

-y The connecting tube 42 is narrow in order to create a flow resistance ^: - for the coolant flow, compared to the, Aus · ,. step tube 40, which is comparatively wide "The cooling unit";

during the cooling period presumably corresponds to the prevailing at

the desired low temperature boiling ,,. .- -. ■ - ". Ψ" .'.- - ■ .. "■■ ..-." ■ -. .. ■ ._ ■ "

Milling takes place in the same way as "for the first "" * Embodiment | the exit tube 40 is then with a ■ fragile closure, for example in.shape, of a. (Not: shown) glass flask ,, closed. The unit's container is now closed and essentially filled with liquid coolant filled under a pressure equal to the vapor pressure of the Coolant at the highest expected ambient temperature ■■■ is to rule out expansion problems. The den, semiconductors ^ detector-containing cooling device is so carefully -as. poss * -: loaned evacuated, .. -: ■ ■ "" '-;' - .. ".'.--.

It can be seen that the connection tube is arranged in the middle

^. the passage of coolant even under high, rotational fair- ■. "' Accelerations made easier * The side openings 41 and 43 are arranged in different views in order to improve the coolant flow along the face to be cooled. a cooling of the coolant passing through the connecting pipe * . '■■ "'". . ■■ ■■, ".. -". "■" ·

The evacuation of the cell surrounding the cooling unit is before "-" -. ^. "Partly, because the unit is _{thermally insulated from the environment up to. Λ} the inlet and outlet pipes * -V

The combination of the two compartments, the connecting tube and '. . the outlet tube enables .. operation of the; Cooling unit in

-11- -

Any spatial position and under considerable acceleration forces. The cooling unit is closed for a long time
Can be stored for a long time and is available for subsequent use. - _: available, ... . . '.. """,.,

Of course, a pack can be used in both compartments of the / .. "," first embodiment or * in only; a compartment of the second
Embodiment, to be included * \

Protection rulings s

Claims (1)

S c Il u t ζ a η s ρ r ü c h es 1 »Cooling unit that is in thermal contact with it-.""; lent objects of small thermal inertia quickly z, u \ - cool, and during, a limited period of time - up. to keep a low temperature, ge ke η η. ζ ei / Gh.-net by a section divided into two sections (26, 27); Loading *; ; container (21, 22), which is completely or essentially completely filled with liquid coolant, through an orifice:. (28. | 42) for the coolant between the two compartments (26, 27) through an outlet pipe (30. | 40) leading out of the one compartment (26)? through a gate direction to the opening of the exit pipe (50, 40) outside the container, as well as through a packing forming a fluid flow resistance. _; (38 |; 4-4,. 45)? through which the coolant to the outlet -by Off '■ _ occurs tube (3O |. 40). passes through »; ^; : -. ■. ^-:::; ■■ '■■ "■;''■■■ -._ ■ .- ■ 2 * cooling unit according to claim 1, characterized in that g: eke η η ze ic h.-. net that the forming a resistance for the liquid flow. Pack. (38j 44) is contained in at least one compartment (26) 'from which the outlet tube. (50f .40). Leads out *; r. ■ ^: '■' - ■; ■ '. ■■■ ' [■■■■ '■ ".-' i- ■■" ■: ■■.; ■■■■ ■ -Ζ -: -: - ' t cooling unit according to claim, characterized g, e / ke nxi ζ ^-.e: ± "c": h "- .net that the performing a resistor for llüssigkeitsströ.mung. Pack (45) ± in the other compartment (27) contains eh ^: is, - -. -. - - '^; . :: ■ ;; ■ '. ;; ^:: ; \ ■ ^: - '. . * ■ "- \ 7 λ.: - / ■■ '- ■■ ■. ■■■ '.' ■■ - ■ - ^; ■; . ■ ■ -13 ^-:: .. - .. 4. Cooling unit according to one of claims 1 to 3, characterized. g ^: e— ^: indicates _? that the-yerto-binding tube (28 £ 42). . compared to the outlet tube (30j 40) a flow. ; represents resistance, ■. . :. .. / 5 * cooling unit according to claim 4, characterized in that gek .e η η ζ e ic .h ^. net that the connection tube (28j 42) over its whole; \ length is narrow ;,. . ..: '. ' ^: . "■" ■ · ■ "... ...", ■>■' 6 * Cooling unit according to requirements. 4 or 5? thereby g eke nn—. ζ egg without t. ₇ that. the connection tube (28) a one -. Narrowing that represents flow resistance. (29) has *. ' ^: . .. . 7 * cooling unit. After one of the previous ones. Claims,. *. which the front of a compartment. geMhlt are: soil _*:; '■■ thereby geke n-η ζ e. 1 ch η et. That the Yerbindiings-. tube (28-42 ) starts from a point near the end face to be cooled (23),. .:. ; _; .; \. : 8 * cooling unit after. Claim 7, characterized in that g: ek en n.-z 'e ic. h - η et, - that the connection tube (28f 42) to a place;: in " . that of the face (23) of the one that is to be rounded off. Compartment (26) remote end face of the other part (27); " leads * ■. '■■ ;;. ■'.. ■ -.- ■ ■ '.'. ■■..""■ -. ■■■ ■; ': ":. . '■■■■ / · ■':. ': _ 9, · Cooling unit according to one of claims Ί_ or B ₁ , g'.e.— _ ₅ k "e η η ζ ei chn \ et, that the end, the connection tube ' ... ('28j 42) on the face to be cooled; (-23) attached. Is \ - and side openings (29 ί .43) for the coolant to pass through *. . -. ■ .-. -. '. .-. . . .. ■ -_. ■ -. 10. » Cooling aggregate according to one of claims 7? 8 or -9, - with. cylindrical container, thus ge lc e η η. I don't know that _: the mouth tube (42) is arranged with its axis essentially concentrically in the cylindrical container « 11 * Cooling unit according to one of the preceding claims,. "At. :: _ which the end face of an AToteil is to be cooled,. ■ '■ dad ^ irch geke η η ζ e i chnet _? That the outlet' - '-; ■ tube (3Oj; 40) starts from a point near the end face (23) to be cooled *..:. "-.-" ■ - · "" -. y 12 # cooling unit according to claim 11, characterized in that the end of the outlet tube (40) at the head · -; surface (23) of a portion Taefestigt and lateral .-. Has openings (41) for the passage of the coolant * ν _ _: 13 * Cooling unit according to claim 11 or -12, thereby k en n-: ζ ei ο h. η et _? that the outlet tube (40) is attached to the connection tube (42) in such a way that heat exchange between the two tubes is possible * ■::. 14 * cooling unit according to one of the preceding claims »characterized in that the container through a; ; .. common wall (25) is separated into the "two parts (26, 27), and that the extension tube (28 | 42) passes through the wall (25) * '" \ _, - . '. ^: - 15 * Cooling unit according to claim 14, 'characterized ge _k en η indicative _r "net that the Austr.it tsröhre (3of 40) / through the wall. (25) 16 * cooling unit according to one of the preceding claims, characterized
geke η η ζ e ic h η et _t that to open the outlet
tube a fragile part is provided outside the container «■. -. . "..- ^{-, ...-::::..} .'- ■;