US1930879A - Heat exchanger - Google Patents
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- US1930879A US1930879A US638220A US63822032A US1930879A US 1930879 A US1930879 A US 1930879A US 638220 A US638220 A US 638220A US 63822032 A US63822032 A US 63822032A US 1930879 A US1930879 A US 1930879A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D9/04—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being formed by spirally-wound plates or laminae
Definitions
- This invention refers to heat-exchangers, and more particularly to heat-exchangers having heat transmitting surfaces of sheet metal bent to a spiral shape. Heat-exchangers of said latter type are very advantageous in respect of their heat economy but have had heretofore no practical use because the apparatus could not fulfil the requirements necessary for practical operation, viz:
- the apparatus should be able to resist high pressures from the liquids, between which the transmission of heat is effected, without any deionnation 01' the spiral plates and without any change of the distance between said plates, because otherwise the resistance to the flow would be considerably increased and consequently one oi the most important advantages of such apparatus be lost. Moreover, the apparatus should be able to resist all stresses and strains to which i a heat-exchanger oi the type referred to and ilt' for resisting all strains and stresses metin normal operation. The apparatus shall also have such compactness and stability as to withstand transportation without damage.
- a further object of this invention is to reduce the losses oi energy to a minimum.
- Fig. 1 shows a vertical section through them:- paratus on the line II in Fig. 2.
- Figr2 is a vertical section on the line IIII in Fig. 1.
- Fig. 3 shows a section on the broken line III- m in Fig. 2, on a somewhat'larger scale.
- Fig. 4 is 8.
- FIG. 5 shows, partly in section, aperspective 'view 01' the rubber packing shown in Fig. 4.
- Figs. 6 and-'7 are sections of details, illustrating modifications of the sealing device shown in Fig. 4.
- Fig. 8 isa partial section through one of the connecting'pipes at the periphery and shows a modification oi the device for stabilizing the same.
- 1 and 2 indi- 35 cates two rectangular plates, or sheets oi' metal, which are bent.to parallel spirals, thus forming 29 areboredto enable said plate 8 to be secured.
- Each plate 1, 2 then forms a heat transmitting surface, in contact with the hot liquid on-one side and with so the cold liquid on the other side.
- the innermost winding oi the spiral is provided with two smaller side plates 13 to form a cylindrical chamber 14.
- Said chamber encloses a central tube or connection pipe 15, closed at one end by one of the side plates 13 and at the other end by a end closure plate 16, the chamber formed within the tube 15 being thus entirely sealed from the chamber 14.
- a pipe 1'7 is mounted, communicating with the chamber 15 and in the other of said side plates 13 another connecting pipe 18 directly communicates with the chamber 14.
- the tube 15 is cut .or slotted axially at 19 substantially throughout its whole length and liquidtightly connected with the channel 3 at said slot.
- the channel 4 discharges into the chamber 14 substantially throughout the whole axial width thereof at 20. "Just as the other ends of the channels at 11 the ends of the channels at 19 and 20 have, for a certain length, a radial width successively increasing indirection to 19 and 20.
- a number of stays or tierods 21 are secured, for instance, riveted or weld-' ed, across the openingsll and 19. Said stays have a narrow width in the direction at right angles to the direction of flow.
- a number of stays 23 are provided between the tubes 9, 10 to stabilize them further and absorb thecouple of forces acting on said tubes.
- the plates-and also the tubes 9, 10 are further secured against displacement so that the widened parts of the channels 3 or 4- at 12 cannot be diminished and thus the resistances to the flow cannot be increased.
- said packings consist of sealing strips having a V- or U- or Ll-shaped cross section with the bottom or base turned towards the adjacent side plate 8, so that the pressure above atmospheric in the channels 3 or 4 presses the packings outwards against the side plate 8 and also against the plates '1, 2.
- the strips 24 may easily be removed, because they are loosely inserted between the plates.
- the legs or flanges 24a of the packing should, as shown in Fig. 5, have a greater distance from each other in their free and unstrained state before they are inserted between the plates than they have after such insertion so as to cause the packing to engage the plates with a certain initial pressure.
- the bottom or base of the packing should also at all places be secured in such manner that a good scaling is attained.
- Special filling pieces 12, 25 are welded to the plates 1, 2 at the widened parts of the channels 3 or 4, i. e. adjacent to the slots 11, 19, 20, to make the space for the packing wedge-shaped, decreasing to about the half of the width at 'said places, as is best seen at 26 in Fig. 3. when mounting said packings, it is, therefore, necessary to press the ends of the packings with force into said spaces and consequently a good sealing is attained and the ends of the packings are securely fixed to the channels.
- sealing strips in accordance with this invention may be removed and again inserted several times without being destroyed, while on the contrary a plane packing can, as a .rule, be used only once, because the edges of the plates make deep impressions in the packing as a result of the strong tightening of the side plates necessary when packings of said lastmentioned type are used.
- the plates 1, 2 may also be provided with low collars or flanges 31 at their edges along their whole peripheral length, as shown in Fig. 6. Said collars or flanges need only be small and then they'hinder neither the removal of the packings nor the cleaning of the channels 3 or 4.
- recesses 32 may be substituted for said flanges at the peripheral edges of the plates, as shown in g. 7
- the packing . is preferably constructed with a U-shaped section to fit snugly in said recesses.
- the tube 9 forms one end of the channel 3 and the tube 17 the other end of the same channel, while the tubes 10 and 18 constitute the two ends of the channel 4.
- the liquids may. be caused to flow in counter-current or inthe same direction through the apparatus, as desired.
- the apparatus may of course be constructed with more than two parallel spiral channels for heat transmission between two or more liquids simultaneously.
- Heat-exchangers having spiral heat transmitting surfaces have the double advantage of a great heat transmitting surface and a small volume and simultaneously a great length of the flow without sharp changes of the direction of.
- the tubes 9 and 10 are stayed by means of cam flanges 33 welded to the outer surface of the tube atsuitable distances from each other.
- Said flanges have preferably the shape of circular plates having eccentric holes for the tubes, as shown.
- the flanges render the stays 21 superfluous, as shown in Fig. 8.
- one single metal sheet may be used which is then doubled to form the tube 15 at the centre of the apparatus so that said tube 15 is integral with the walls of the two channels in which the two fluids flow in heat exchanging relation to each other.
- the single doubled plate becomes in efiect two plates.
- a heat-exchanger in combination, two or more metal plates bent to substantially parallel spirals forming channels between themselves, said channels having successively increasing cross-sectional areas at their ends, distance p eces secured between said plates adjacent to their spiral edges, said distance pieces being narrow in the peripheral and the axial directions of said spiral plates, and removable packings of a resilient non-metallic material in the open spaces at the spiral edges of said plates to seal said channels at those surfaces of the spirals, which are substantially at right angles to the axis thereof.
- a heat-exchanger in combination, two or more metal plates bent to substantially parallel spirals forming channels betweenthemselves, distance pieces between said plates and welded to said plates adjacent to their spiral edges, said distance pieces being narrow in the peripheral direct on and also in the axial direction of said spiral plates, tubes at the periphery and at the centre of said spiral plates and provided with slots which extend substantially the entire axial width of said spiral plates, l'quid-tight connections between said plates and said tubes on both sides of said slots, stays secured'across said slots between the edges thereof and removable packings of a resilient material in the open spaces at the spral edges of said plates to seal said channels at those surfaces of the spirals, which are substantially at right angles to the axis thereof.
- a heat-exchanger in combination, two or more metal plates bent to substantially par allel spirals, forming channels between themselves, said channels having successively increasing cross-sectlonal areas at their ends, distance pieces secured between said plates adjacent to their spiral'edges, said distance pieces being narrow in the peripheral and the axial directions of said spiral plates, and sealing strips of a resilient, non-metallic material inserted into the open spiral ends of said channels to close and seal them in the axial direction.
- a heat-exchanger in combination, two or more metal plates bent to substantially parallel spirals, formng channels between themselves, said channels having successively increasing cross-sectional areas at their ends, distance pieces secured between said plates adjacent to their spiral edges, said dstance pieces being nar row in the peripheral and the axial directions of said spiral plates, and sealing strips of a nonmetallic, resilient material inserted into the open spiral ends of said channels to close and seal them in the axial direction, said strips having a substantially U-shaped cross section.
- a heat-exchanger in combination, two or more metal plates bent to substantially parallel spirals, forming channels between themselves, said channels having successively increasing cross-sectional areas at their ends, distance pieces secured between said plates adjacent to their spiral edges, said distance pieces being narrow in the peripheral and the axial directions of said spiral plates, sealing strips of a resilient, nonmetallic material inserted into the open spiral ends of said channels to close and seal them in 14,5 the axial direction, and shoulders on said plates at their spiral edges to prevent said strips from sliding outwards axially.
- a heat-exchanger in combination, two or more metal plates bent to substantially parallel spirals forming channels between themselves, said channels having successively increasing cross-sectional areas at their ends, distance pieces secured between said plates adjacent; to their spiral edges, said distance pieces being narrow in the peripheral and the axial directions of said spiral plates, sealing strips of a. resilient, nonmetallic material inserted into the open spiral ends of said channels to close and seal them in the axial direction, and shoulders projecting radially from said plates at their spiral edges to prevent said strips from sliding outwards axially, said shoulders being so low in the radial direction that said plates are readily accessible for cleaning after removal of said strips.
- a heat-exchanger in combination, two or more metal plates bent to substantially parallel spirals forming channels between themselves, distance pieces secured between said plates adjacent to their spiral edges, said distance pieces being narrow in the peripheral and the axial directions of said spiral plates, removable packings of a resilient, non-metallic material at those edges of said spiral plates, which are substantially at right angles to the axis thereof, to close said channels, substantially plane side plates at said edges of said spiral plates and oneor more slots in said side plates for draining off liquid possibly leaking out.
- a heat-exchanger in combination, two or more metal plates bent to substantially parallel spirals, forming channels between themselves, said channels having successively increasing cross-sectional areas at their ends, distance pieces secured between said plates adjacent to their spiral edges, said distance pieces being narrow in the peripheral and the axial directions of said spiral plates, removable packings of a resilient, non-metallic material at those edges of said spiral plates, which are substantially at right angles to the axis thereof, to close said channels, substantially plane side plates at said edges of said spiral plates, one or more slots in said side plates for draining oil liquid possibly leaking out, and means for keeping said side plates at a determined distance from the spiral edges of said plates.
- a heat-exchanger in combination, two or more metal plates bent to substantially parallel spirals, forming channels between themselves, said channels having successively increasing cross-sectional areas at their ends, distance pieces secured-between said plates adjacent to their spiral edges, said distance pieces being narrow in the peripheral and the axial directions of said spiral plates, removable packings of a resilient, non-metallic material at those edges of said splral plates, which are substantially at right angles to'theaxis; thereof, to close said channels axially, substantially plane side plates at said edges of said spiral plates, one or more slots in said side plates, for draining off liquid possibly leaking out, bolts for securing said side plates to said spiral plates, and distance sleeves on said bolts N ISO
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Description
@ctw 3'7, 1933. E. T. LINDEROTH ET AL 9 3 HEAT EXCHANGE]?! Filed Oct. 17, 1932 o e!!! l Ii cl Ii "I XIII/II Patented Oct. 17, 1933 mwr nxcnaNGla Erik Tornld Linderoth, sun
andcurt dlvall. Fredrik Bosenblad, Stockholm, Sweden; said Linderoth assignor to said Rosenblad Application October 17, 1932, Serial No. 638,220,
and in Sweden July 26, 1930 Y 12 Claims. (01. 251-245) This invention refers to heat-exchangers, and more particularly to heat-exchangers having heat transmitting surfaces of sheet metal bent to a spiral shape. Heat-exchangers of said latter type are very advantageous in respect of their heat economy but have had heretofore no practical use because the apparatus could not fulfil the requirements necessary for practical operation, viz:
l. The apparatus should be able to resist high pressures from the liquids, between which the transmission of heat is effected, without any deionnation 01' the spiral plates and without any change of the distance between said plates, because otherwise the resistance to the flow would be considerably increased and consequently one oi the most important advantages of such apparatus be lost. Moreover, the apparatus should be able to resist all stresses and strains to which i a heat-exchanger oi the type referred to and ilt' for resisting all strains and stresses metin normal operation. The apparatus shall also have such compactness and stability as to withstand transportation without damage.
A further object of this invention is to reduce the losses oi energy to a minimum.
Other objects will be evident from the iollowing specification and claims. A
Some embodiments of the invention are shown in the annexed drawing.
Fig. 1 shows a vertical section through them:- paratus on the line II in Fig. 2. Figr2 is a vertical section on the line IIII in Fig. 1. Fig. 3 shows a section on the broken line III- m in Fig. 2, on a somewhat'larger scale. Fig. 4 is 8.
- horizontal section of a detail on a larger scale,to r illustrate the sealing device at-theedges or the spirals. Fig. 5 shows, partly in section, aperspective 'view 01' the rubber packing shown in Fig. 4. Figs. 6 and-'7 are sections of details, illustrating modifications of the sealing device shown in Fig. 4. Fig. 8 isa partial section through one of the connecting'pipes at the periphery and shows a modification oi the device for stabilizing the same.
Referring now tothe drawing, 1 and 2 indi- 35 cates two rectangular plates, or sheets oi' metal, which are bent.to parallel spirals, thus forming 29 areboredto enable said plate 8 to be secured.
between themselves two spiral channels 3, 4, each receiving one of the liquids, between which the transmission of heat is to be made. Each plate 1, 2 then forms a heat transmitting surface, in contact with the hot liquid on-one side and with so the cold liquid on the other side. I
Around the plates two rings 5. are secured to give the apparatus an increased stability and on said rings supports or feet 6 are secured on which the apparatus' rests. In said rings holes 7 for bolts to the apparatus.
To the top of the apparatus imo flanged tubes or connection pipes 9, 10 are secured which are cut axially toa distance substantially correspondo ing to the whole axial width of the plates 1, 2., as indicated at 11 and said plates are secured to the tubes 9, 10 on both sides of said cuts or slots 11 in such manner that the channels 3 or 4 communicate with said tubes 9, 1'0. In the radial direction the slots or cuts 11 have a" greater width than the ordinary radial width 01' the channels 3 or 4,and said channels are, as indicated at 12 in Figs. 1 and'3, successively widened for a distance adjacent to the tubes 9,-10 in the direction towards the slots 11 in such manner that the cross-sectional area 0! each channel successively increasesin the direction to the tubes 9, 10 for a certain .distance or decreases in-the opposite direction.
In the centre of the apparatus the innermost winding oi the spiral is provided with two smaller side plates 13 to form a cylindrical chamber 14. Said chamber encloses a central tube or connection pipe 15, closed at one end by one of the side plates 13 and at the other end by a end closure plate 16, the chamber formed within the tube 15 being thus entirely sealed from the chamber 14. In one of the side plates 13 a pipe 1'7 is mounted, communicating with the chamber 15 and in the other of said side plates 13 another connecting pipe 18 directly communicates with the chamber 14. I I
The tube 15 is cut .or slotted axially at 19 substantially throughout its whole length and liquidtightly connected with the channel 3 at said slot. Similarly, the channel 4 discharges into the chamber 14 substantially throughout the whole axial width thereof at 20. "Just as the other ends of the channels at 11 the ends of the channels at 19 and 20 have, for a certain length, a radial width successively increasing indirection to 19 and 20.
Because the inlet and the outlet openings at 11 and lflextendsubstantially acrosstheentireaxial width of the spirals so as to prevent any throttling resistance or strength at said places inasmuch as the tensile stresses in the outermost winding of the spiral plates are transformed to bending stresses in the inlet and outlet tubes 9, 10 and, similarly, bending stresses are originated inthe tube 15,.if the pressure in one of the two channels 3, 4 is higher than that in the other. To absorb such stresses without any use of material of extreme thickness a number of stays or tierods 21 are secured, for instance, riveted or weld-' ed, across the openingsll and 19. Said stays have a narrow width in the direction at right angles to the direction of flow.
It was already mentioned that it is very important in heat-exchangers of this type that the plates 1 and 2 be on their total surface prevented from displacement in relation to each other and from local outward or inward bulging, buckling or the like because otherwise the spiral channels will be throttled. For this reason distance pieces 22 are secured, preferablywelded, between the plates 1, 2 adjacent to the edges of the spirals. Because the plates as a result of their curved shape have a high resistance to stresses and pressure and in addition are always kept in the ,correct position to each other by the distance pieces, the apparatus has a high stability and resistance to stresses and pressure.
A number of stays 23 are provided between the tubes 9, 10 to stabilize them further and absorb thecouple of forces acting on said tubes. Thus, the plates-and also the tubes 9, 10 are further secured against displacement so that the widened parts of the channels 3 or 4- at 12 cannot be diminished and thus the resistances to the flow cannot be increased.
To effect the sealing rendered necessary by the open construction of the channels 3 or 4 at the end surfaces of the apparatus sealing strips or packings 24 of rubber, leather or other suitable material are inserted between the plates 1, 2 at said ends. In the embodiment shown, said packings consist of sealing strips having a V- or U- or Ll-shaped cross section with the bottom or base turned towards the adjacent side plate 8, so that the pressure above atmospheric in the channels 3 or 4 presses the packings outwards against the side plate 8 and also against the plates '1, 2. For cleaning the apparatusthe strips 24 may easily be removed, because they are loosely inserted between the plates. Preferably, the legs or flanges 24a of the packing should, as shown in Fig. 5, have a greater distance from each other in their free and unstrained state before they are inserted between the plates than they have after such insertion so as to cause the packing to engage the plates with a certain initial pressure.
The bottom or base of the packing should also at all places be secured in such manner that a good scaling is attained. Special filling pieces 12, 25 are welded to the plates 1, 2 at the widened parts of the channels 3 or 4, i. e. adjacent to the slots 11, 19, 20, to make the space for the packing wedge-shaped, decreasing to about the half of the width at 'said places, as is best seen at 26 in Fig. 3. when mounting said packings, it is, therefore, necessary to press the ends of the packings with force into said spaces and consequently a good sealing is attained and the ends of the packings are securely fixed to the channels.
To prevent any mixing of the liquids in the apparatus the spiral channels 27 formed between vantages in'comparison, for instance, with that construction, in which the sides of the apparatus are closed by means of plane disks and intermediate plane rubber packings: The apparatus in accordance with theinvention is cheaper, because neither the end surface of the plates 1 and 2 nor the side plates 8 need be planed. Such planing is a very expensive procedure and in. using stainless iron almost impossible to efiect. The thickness of said side plates and the dimensions of the connections 29, 30 may, in accordance with this invention be considerably reduced, because the pressures on the side plates is considerably lower than that occurring in the construction using plane circular packing disks.
Furthermore, the sealing strips in accordance with this invention may be removed and again inserted several times without being destroyed, while on the contrary a plane packing can, as a .rule, be used only once, because the edges of the plates make deep impressions in the packing as a result of the strong tightening of the side plates necessary when packings of said lastmentioned type are used.
It is even possible to omit the side plates 8, if the packings 24 have a sufficiently great width in relation to the radial width of the channels 3 or 4, becausein such case the force pressingthe packing 24 against the plates 1, 2 is so much stronger than the force tending to press out said packing from the channels 3 or 4 that the packing is securely held in position solely by the friction against the plates 1, 2.
To prevent the packings 24 from being pressed out of the channels 3 or 4 during the operation of the apparatus-the plates 1, 2 may also be provided with low collars or flanges 31 at their edges along their whole peripheral length, as shown in Fig. 6. Said collars or flanges need only be small and then they'hinder neither the removal of the packings nor the cleaning of the channels 3 or 4.
If the thickness of the plates 1, 2 is sufficiently great, recesses 32 may be substituted for said flanges at the peripheral edges of the plates, as shown in g. 7 In such case the packing .is preferably constructed with a U-shaped section to fit snugly in said recesses.
It is evident from the statements above that the tube 9 forms one end of the channel 3 and the tube 17 the other end of the same channel, while the tubes 10 and 18 constitute the two ends of the channel 4. The liquids may. be caused to flow in counter-current or inthe same direction through the apparatus, as desired. In the ernbodinent shown only two spiral channels are illus rated, but the apparatus may of course be constructed with more than two parallel spiral channels for heat transmission between two or more liquids simultaneously.
Heat-exchangers having spiral heat transmitting surfaces have the double advantage of a great heat transmitting surface and a small volume and simultaneously a great length of the flow without sharp changes of the direction of.
flow within the apparatus. Consequently, such apparatus have high coeflicients of heat transmission and a minimum resistance to the flow and require a minimum of pumping work.
By use of the apparatus inv accordance with this invention a low total resistance is secured because the channels are nowhere throttled and because the losses at the inlets and outlets are low on account of the successively decreasing or increasing cross-section of the channels at those places. Thus, a uniform acceleration or retardation of the flowing liquids is attained with minimum losses of pressure. p
In the embodiment shown in Figs. 3 and 8 the tubes 9 and 10 (only tube 9 is shown in Fig. 8) are stayed by means of cam flanges 33 welded to the outer surface of the tube atsuitable distances from each other. Said flanges have preferably the shape of circular plates having eccentric holes for the tubes, as shown. The flanges render the stays 21 superfluous, as shown in Fig. 8.
For the two sheets of metal 1, 2 one single metal sheet may be used which is then doubled to form the tube 15 at the centre of the apparatus so that said tube 15 is integral with the walls of the two channels in which the two fluids flow in heat exchanging relation to each other. In this case the single doubled plate becomes in efiect two plates.
What we claim is:-
1. In a heat-exchanger, in combinat'on, parallel heat transmitting surfaces of sheet'metal bent to a spiral shape, distance pieces inserted between said surfaces adjacent to the edges of the spiral which are at right angles to the axis thereof, said d'stance pieces having small dimensions in the peripheral and axial direction of said spiral, and removable packings of a resilient material at said edges to close the space between sa d surfaces.
2. In a heat-exchanger, in combination, two or more metal plates bent to substantially parallel spirals forming channels between themselves, said channels having successively increasing cross-sectional areas at their ends, distance p eces secured between said plates adjacent to their spiral edges, said distance pieces being narrow in the peripheral and the axial directions of said spiral plates, and removable packings of a resilient non-metallic material in the open spaces at the spiral edges of said plates to seal said channels at those surfaces of the spirals, which are substantially at right angles to the axis thereof.
3. In a heat-exchanger, in combination, two or more metal plates bent to substantially parallel spirals forming channels betweenthemselves, distance pieces between said plates and welded to said plates adjacent to their spiral edges, said distance pieces being narrow in the peripheral direct on and also in the axial direction of said spiral plates, tubes at the periphery and at the centre of said spiral plates and provided with slots which extend substantially the entire axial width of said spiral plates, l'quid-tight connections between said plates and said tubes on both sides of said slots, stays secured'across said slots between the edges thereof and removable packings of a resilient material in the open spaces at the spral edges of said plates to seal said channels at those surfaces of the spirals, which are substantially at right angles to the axis thereof.
4. In a heat-exchanger,
between the edges, additional stays between those I in combination, two or more rectangular metal plates bent to substantially parallel spirals with channels therebetween, distance pieces inserted between and welded to sad plates adjacent to their spiral edges, said distance pieces being narrow in the peripheral and axial directions of said spiral plates, tubes at the periphery and at the centre of said spiral plates and slotted to a distance corresponding substantially to the entire axial width of said spiral plates and hermetically con-= nected with said plates on both sides of said slots, stays secured across said slots between the edges thereohflanges welded on the outside of those of said tubes, which are arranged at the periphery of the spiral plates, and removable packings of a non-metallic material in the open ends of said channels to seal them in the axial direction.
5. In a heat-exchanger, in'combination, two or more metal plates bent to substantially parallel spirals forming channels'between themselves, distance pieces inserted between and welded to said plates adjacent to their spiral edges, said distance pieces being narrow in the per'pheral direction and also in the axial direction of said spiral plates, tubes at the periphery and at the centre of said spiral plates and provided with slots throughout substantially the entire axial width of said spirals, liquid-tight connections between said plates and said tubes-on both sides of said slots, stays across said slots tubes, which are arranged at the periphery of said plates, and removable packings of a resilient material at the open ends of said channels to seal them in the axial direction.
6. In a heat-exchanger, in combination, two or more metal plates bent to substantially par allel spirals, forming channels between themselves, said channels having successively increasing cross-sectlonal areas at their ends, distance pieces secured between said plates adjacent to their spiral'edges, said distance pieces being narrow in the peripheral and the axial directions of said spiral plates, and sealing strips of a resilient, non-metallic material inserted into the open spiral ends of said channels to close and seal them in the axial direction.
'7. In a heat-exchanger, in combination, two or more metal plates bent to substantially parallel spirals, formng channels between themselves, said channels having successively increasing cross-sectional areas at their ends, distance pieces secured between said plates adjacent to their spiral edges, said dstance pieces being nar row in the peripheral and the axial directions of said spiral plates, and sealing strips of a nonmetallic, resilient material inserted into the open spiral ends of said channels to close and seal them in the axial direction, said strips having a substantially U-shaped cross section.
8. In a heat-exchanger, in combination, two or more metal plates bent to substantially parallel spirals, forming channels between themselves, said channels having successively increasing cross-sectional areas at their ends, distance pieces secured between said plates adjacent to their spiral edges, said distance pieces being narrow in the peripheral and the axial directions of said spiral plates, sealing strips of a resilient, nonmetallic material inserted into the open spiral ends of said channels to close and seal them in 14,5 the axial direction, and shoulders on said plates at their spiral edges to prevent said strips from sliding outwards axially.
-9. In a heat-exchanger, in combination, two or more metal plates bent to substantially parallel spirals forming channels between themselves, said channels having successively increasing cross-sectional areas at their ends, distance pieces secured between said plates adjacent; to their spiral edges, said distance pieces being narrow in the peripheral and the axial directions of said spiral plates, sealing strips of a. resilient, nonmetallic material inserted into the open spiral ends of said channels to close and seal them in the axial direction, and shoulders projecting radially from said plates at their spiral edges to prevent said strips from sliding outwards axially, said shoulders being so low in the radial direction that said plates are readily accessible for cleaning after removal of said strips.
10. In a heat-exchanger, in combination, two or more metal plates bent to substantially parallel spirals forming channels between themselves, distance pieces secured between said plates adjacent to their spiral edges, said distance pieces being narrow in the peripheral and the axial directions of said spiral plates, removable packings of a resilient, non-metallic material at those edges of said spiral plates, which are substantially at right angles to the axis thereof, to close said channels, substantially plane side plates at said edges of said spiral plates and oneor more slots in said side plates for draining off liquid possibly leaking out.
11. In a heat-exchanger, in combination, two or more metal plates bent to substantially parallel spirals, forming channels between themselves, said channels having successively increasing cross-sectional areas at their ends, distance pieces secured between said plates adjacent to their spiral edges, said distance pieces being narrow in the peripheral and the axial directions of said spiral plates, removable packings of a resilient, non-metallic material at those edges of said spiral plates, which are substantially at right angles to the axis thereof, to close said channels, substantially plane side plates at said edges of said spiral plates, one or more slots in said side plates for draining oil liquid possibly leaking out, and means for keeping said side plates at a determined distance from the spiral edges of said plates.
12. In a heat-exchanger, in combination, two or more metal plates bent to substantially parallel spirals, forming channels between themselves, said channels having successively increasing cross-sectional areas at their ends, distance pieces secured-between said plates adjacent to their spiral edges, said distance pieces being narrow in the peripheral and the axial directions of said spiral plates, removable packings of a resilient, non-metallic material at those edges of said splral plates, which are substantially at right angles to'theaxis; thereof, to close said channels axially, substantially plane side plates at said edges of said spiral plates, one or more slots in said side plates, for draining off liquid possibly leaking out, bolts for securing said side plates to said spiral plates, and distance sleeves on said bolts N ISO
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE1930879X | 1930-07-26 | ||
SE48245X | 1932-03-18 |
Publications (1)
Publication Number | Publication Date |
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US1930879A true US1930879A (en) | 1933-10-17 |
Family
ID=40786646
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US638220A Expired - Lifetime US1930879A (en) | 1930-07-26 | 1932-10-17 | Heat exchanger |
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US (1) | US1930879A (en) |
DE (1) | DE595190C (en) |
DK (1) | DK48245C (en) |
FR (1) | FR747978A (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2507094A (en) * | 1944-09-08 | 1950-05-09 | Stewart Warner Corp | Method of and apparatus for making spiral heat exchangers |
US2610038A (en) * | 1949-03-29 | 1952-09-09 | Loyal G Goff | Thermal respirator |
US2736533A (en) * | 1953-03-26 | 1956-02-28 | John L Allen | Heat exchange apparatus |
US3259183A (en) * | 1961-12-30 | 1966-07-05 | Basf Ag | Plate type heat exchanger utilizing movable plate |
US3921713A (en) * | 1973-12-26 | 1975-11-25 | Zachry Co H B | Heat exchanger |
US4128125A (en) * | 1975-08-28 | 1978-12-05 | Alfa-Laval Ab | Spiral heat exchanger |
US4993487A (en) * | 1989-03-29 | 1991-02-19 | Sundstrand Corporation | Spiral heat exchanger |
WO2004102101A1 (en) * | 2003-05-15 | 2004-11-25 | Alfa Laval Corporate Ab | A spiral heat exchanger |
US20110176316A1 (en) * | 2011-03-18 | 2011-07-21 | Phipps J Michael | Semiconductor lamp with thermal handling system |
US20110176291A1 (en) * | 2011-03-18 | 2011-07-21 | Sanders Chad N | Semiconductor lamp |
US20110193473A1 (en) * | 2011-03-18 | 2011-08-11 | Sanders Chad N | White light lamp using semiconductor light emitter(s) and remotely deployed phosphor(s) |
US20130140010A1 (en) * | 2011-12-05 | 2013-06-06 | Autokuhler Gmbh & Co. Kg | Heat exchanger |
US10782074B2 (en) | 2017-10-20 | 2020-09-22 | Api Heat Transfer, Inc. | Heat exchanger with a cooling medium bar |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010046913A1 (en) * | 2010-09-29 | 2012-03-29 | Hydac Cooling Gmbh | heat exchangers |
-
1932
- 1932-09-10 DK DK48245D patent/DK48245C/en active
- 1932-10-04 DE DER86060D patent/DE595190C/en not_active Expired
- 1932-10-17 US US638220A patent/US1930879A/en not_active Expired - Lifetime
- 1932-12-23 FR FR747978D patent/FR747978A/en not_active Expired
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2507094A (en) * | 1944-09-08 | 1950-05-09 | Stewart Warner Corp | Method of and apparatus for making spiral heat exchangers |
US2610038A (en) * | 1949-03-29 | 1952-09-09 | Loyal G Goff | Thermal respirator |
US2736533A (en) * | 1953-03-26 | 1956-02-28 | John L Allen | Heat exchange apparatus |
US3259183A (en) * | 1961-12-30 | 1966-07-05 | Basf Ag | Plate type heat exchanger utilizing movable plate |
US3921713A (en) * | 1973-12-26 | 1975-11-25 | Zachry Co H B | Heat exchanger |
US4128125A (en) * | 1975-08-28 | 1978-12-05 | Alfa-Laval Ab | Spiral heat exchanger |
US4993487A (en) * | 1989-03-29 | 1991-02-19 | Sundstrand Corporation | Spiral heat exchanger |
US7640972B2 (en) | 2003-05-15 | 2010-01-05 | Alfa Laval Corporate Ab | Spiral heat exchanger |
US20070062680A1 (en) * | 2003-05-15 | 2007-03-22 | Philippe Maupetit | Spiral heat exchanger |
CN100464150C (en) * | 2003-05-15 | 2009-02-25 | 阿尔法拉瓦尔股份有限公司 | A spiral heat exchanger |
WO2004102101A1 (en) * | 2003-05-15 | 2004-11-25 | Alfa Laval Corporate Ab | A spiral heat exchanger |
US20110176316A1 (en) * | 2011-03-18 | 2011-07-21 | Phipps J Michael | Semiconductor lamp with thermal handling system |
US20110176291A1 (en) * | 2011-03-18 | 2011-07-21 | Sanders Chad N | Semiconductor lamp |
US20110193473A1 (en) * | 2011-03-18 | 2011-08-11 | Sanders Chad N | White light lamp using semiconductor light emitter(s) and remotely deployed phosphor(s) |
US8272766B2 (en) * | 2011-03-18 | 2012-09-25 | Abl Ip Holding Llc | Semiconductor lamp with thermal handling system |
US8461752B2 (en) | 2011-03-18 | 2013-06-11 | Abl Ip Holding Llc | White light lamp using semiconductor light emitter(s) and remotely deployed phosphor(s) |
US8596827B2 (en) | 2011-03-18 | 2013-12-03 | Abl Ip Holding Llc | Semiconductor lamp with thermal handling system |
US8803412B2 (en) | 2011-03-18 | 2014-08-12 | Abl Ip Holding Llc | Semiconductor lamp |
US20130140010A1 (en) * | 2011-12-05 | 2013-06-06 | Autokuhler Gmbh & Co. Kg | Heat exchanger |
US10782074B2 (en) | 2017-10-20 | 2020-09-22 | Api Heat Transfer, Inc. | Heat exchanger with a cooling medium bar |
Also Published As
Publication number | Publication date |
---|---|
FR747978A (en) | 1933-06-26 |
DK48245C (en) | 1934-01-08 |
DE595190C (en) | 1934-04-11 |
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