ITMI20132086A1 - HIGH EFFICIENCY HEAT EXCHANGER FOR BOILERS AND HOT AIR GENERATORS - Google Patents

HIGH EFFICIENCY HEAT EXCHANGER FOR BOILERS AND HOT AIR GENERATORS

Info

Publication number
ITMI20132086A1
ITMI20132086A1 IT002086A ITMI20132086A ITMI20132086A1 IT MI20132086 A1 ITMI20132086 A1 IT MI20132086A1 IT 002086 A IT002086 A IT 002086A IT MI20132086 A ITMI20132086 A IT MI20132086A IT MI20132086 A1 ITMI20132086 A1 IT MI20132086A1
Authority
IT
Italy
Prior art keywords
heat exchanger
exchanger
tubes
combustion chamber
tube
Prior art date
Application number
IT002086A
Other languages
Italian (it)
Inventor
Lorenzo Vergani
Original Assignee
Apen Group S P A
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Apen Group S P A filed Critical Apen Group S P A
Priority to IT002086A priority Critical patent/ITMI20132086A1/en
Priority to RU2014149802A priority patent/RU2014149802A/en
Priority to EP14197365.1A priority patent/EP2884201A1/en
Publication of ITMI20132086A1 publication Critical patent/ITMI20132086A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/06—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators
    • F24H3/065—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators using fluid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/06—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators
    • F24H3/08—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators by tubes
    • F24H3/087—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators by tubes using fluid fuel
    • 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
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/053—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
    • F28D1/0535—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight the conduits having a non-circular cross-section
    • F28D1/05366—Assemblies of conduits connected to common headers, e.g. core type radiators
    • F28D1/05383—Assemblies of conduits connected to common headers, e.g. core type radiators with multiple rows of conduits or with multi-channel conduits
    • 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0001—Recuperative heat exchangers
    • F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
    • F28D21/0005—Recuperative heat exchangers the heat being recuperated from exhaust gases for domestic or space-heating systems
    • F28D21/0008—Air heaters
    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
    • F28D7/1615—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation the conduits being inside a casing and extending at an angle to the longitudinal axis of the casing; the conduits crossing the conduit for the other heat exchange medium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F28F1/025—Tubular elements of cross-section which is non-circular with variable shape, e.g. with modified tube ends, with different geometrical features
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/42—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element
    • F28F1/424—Means comprising outside portions integral with inside portions
    • F28F1/426—Means comprising outside portions integral with inside portions the outside portions and the inside portions forming parts of complementary shape, e.g. concave and convex
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F28F2001/027—Tubular elements of cross-section which is non-circular with dimples

Description

DESCRIZIONE DESCRIPTION

dell'invenzione industriale avente per titolo: of the industrial invention entitled:

“Scambiatore di calore ad elevata efficienza per caldaie e generatori d’aria calda” "High efficiency heat exchanger for boilers and hot air generators"

* * * * * * * *

La presente invenzione concerne uno scambiatore di calore ad elevata efficienza per caldaie e generatori d’aria calda. The present invention relates to a high efficiency heat exchanger for boilers and hot air generators.

Sono noti scambiatori di calore comprendenti una camera di combustione, atta ad accogliere un bruciatore, una camera di scarico fumi ed una pluralità di tubi scambiatori comunicanti con le due camere. Tali scambiatori sono progettati per essere accoppiati a generatori d’aria calda, con la funzione di sfruttare i prodotti di combustione, quali fumi e vapore acqueo, per realizzare uno scambio di energia termica con l’ambiente circostante. Heat exchangers are known which comprise a combustion chamber, suitable for housing a burner, a flue gas discharge chamber and a plurality of exchanger tubes communicating with the two chambers. These exchangers are designed to be coupled to hot air generators, with the function of exploiting the combustion products, such as fumes and water vapor, to achieve an exchange of thermal energy with the surrounding environment.

In particolare, è noto dal brevetto EP- 1429085 uno scambiatore di calore comprendente una pluralità di tubi connessi tra loro e ad una camera di combustione per mezzo di due piastre tubiere, una posteriore ed una anteriore; la piastra anteriore è poi provvista di un collettore atto al collegamento di una canna fumaria per l’espulsione dei prodotti della combustione. In particular, from patent EP-1429085 a heat exchanger is known comprising a plurality of tubes connected to each other and to a combustion chamber by means of two tube plates, one rear and one front; the front plate is then provided with a manifold suitable for connecting a flue for the expulsion of combustion products.

Lo scambiatore di calore descritto nel brevetto EP- 1429085 è caratterizzato dal fatto di comprendere tubi scambiatori aventi le estremità con una sezione circolare, dette estremità essendo in corrispondenza dei punti di connessione alle rispettive piastre tubiere, ed una porzione intermedia in cui la sezione diventa ellittica. I tubi scambiatori sono raggruppati su due fianchi opposti rispetto alla camera di combustione, che ha una forma a goccia, ed in particolare sono disposti in corrispondenza della parte affusolata di detta camera di combustione. The heat exchanger described in patent EP-1429085 is characterized by the fact that it comprises exchanger tubes having ends with a circular section, said ends being in correspondence with the connection points to the respective tube plates, and an intermediate portion in which the section becomes elliptical . The exchanger tubes are grouped on two opposite sides with respect to the combustion chamber, which has a drop shape, and in particular are arranged in correspondence with the tapered part of said combustion chamber.

L’ingombro maggiore di un tale gruppo scambiatore è legato alle dimensioni della camera di combustione, che non possono essere oltremodo ridotte senza fare i conti con una riduzione dell’efficienza energetica o, in casi peggiori, andare incontro a malfunzionamenti dovuti all’eccessivo suniscaldamento dello scambiatore. The larger footprint of such an exchanger group is linked to the size of the combustion chamber, which cannot be greatly reduced without taking into account a reduction in energy efficiency or, in worst cases, malfunctions due to excessive overheating. of the exchanger.

Inoltre, le geometria circolare delle sezioni dei tubi alle estremità limita il compattamento degli stessi poiché si necessitano spazi opportuni per effettuare la saldatura alle superfici delle piastre e, allo stesso tempo, tali da consentire il passaggio dei fumi generati dalla combustione. Furthermore, the circular geometry of the sections of the tubes at the ends limits the compacting of the same since suitable spaces are required to carry out the welding to the surfaces of the plates and, at the same time, such as to allow the passage of the fumes generated by combustion.

Volendo ridurre il volume occupato dallo scambiatore di calore, mantenendo inalterata la geometria dei tubi sopradescritta, l’unica strada è quella di ridurre il numero dei tubi stessi; tuttavia, in tal modo, si pregiudicano le prestazioni e l’efficienza energetica. Wanting to reduce the volume occupied by the heat exchanger, while maintaining the geometry of the pipes described above, the only way is to reduce the number of pipes themselves; however, in this way, performance and energy efficiency are compromised.

Scopo della presente invenzione è quello di realizzare uno scambiatore di calore di dimensioni ridotte, che offra al contempo un incremento dell’efficienza energetica. The purpose of the present invention is to create a heat exchanger of reduced dimensions, which at the same time offers an increase in energy efficiency.

In accordo alla presente invenzione, detto scopo viene raggiunto mediante uno scambiatore di calore comprendente una camera di combustione, atta ad accogliere un bruciatore, ed una pluralità di tubi scambiatori connessi a detta camera di combustione e tra loro per mezzo di due piastre tubiere delle quali una provvista di un collettore per l’uscita dei prodotti della combustione, detto scambiatore essendo caratterizzato dal fatto che ciascun tubo di detta pluralità di tubi scambiatori ha un profilo schiacciato e che detta camera di combustione ha un corpo di forma cilindrica. In accordance with the present invention, said object is achieved by means of a heat exchanger comprising a combustion chamber, adapted to receive a burner, and a plurality of exchanger tubes connected to said combustion chamber and to each other by means of two tube plates of which a provided with a manifold for the output of the combustion products, said exchanger being characterized in that each tube of said plurality of exchanger tubes has a flattened profile and that said combustion chamber has a cylindrical body.

Le caratteristiche ed i vantaggi della presente invenzione risulteranno evidenti dalla seguente descrizione dettagliata di una sua forma di realizzazione pratica, illustrata a titolo di esempio non limitativo negli uniti disegni, nei quali: The characteristics and advantages of the present invention will become evident from the following detailed description of a practical embodiment thereof, illustrated by way of non-limiting example in the accompanying drawings, in which:

la figura 1 mostra una vista in prospettiva di uno scambiatore di calore secondo la presente invenzione; Figure 1 shows a perspective view of a heat exchanger according to the present invention;

le figure 2a, 2b mostrano rispettivamente un tubo scambiatore compreso nello scambiatore di calore di figura 1 ed una vista in sezione dello stesso tubo secondo la linea II-II di figura 2a; Figures 2a, 2b respectively show an exchanger tube included in the heat exchanger of Figure 1 and a sectional view of the same tube along the line II-II of Figure 2a;

la figura 3 mostra una vista laterale dello scambiatore di calore di figura 1 ; figure 3 shows a side view of the heat exchanger of figure 1;

la figura 4 mostra una vista frontale dello scambiatore di calore di figura 1 ; figure 4 shows a front view of the heat exchanger of figure 1;

la figura 5 mostra una vista posteriore dello scambiatore di calore di figura 1 ; la figura 6 mostra una vista superiore dello scambiatore di calore di figura 1 ; la figura 7 mostra una vista in sezione dello scambiatore di calore secondo la linea VII-VII di figura 3; figure 5 shows a rear view of the heat exchanger of figure 1; figure 6 shows a top view of the heat exchanger of figure 1; figure 7 shows a sectional view of the heat exchanger along the line VII-VII of figure 3;

la figura 8 mostra una vista in sezione dello scambiatore di calore secondo la linea Vili- Vili di figura 4; Figure 8 shows a sectional view of the heat exchanger along the line VIII-VIII of Figure 4;

la figura 9 mostra una vista in prospettiva di uno scambiatore di calore secondo la presente invenzione con l’accoppiamento di un bruciatore. Figure 9 shows a perspective view of a heat exchanger according to the present invention with the coupling of a burner.

In figura 1 è mostrato uno scambiatore di calore 1 secondo la presente invenzione. Detto scambiatore di calore 1 comprende essenzialmente una camera di combustione 3, atta ad accogliere un bruciatore 111 (figura 9), ed una pluralità di tubi scambiatori 4 connessi tra loro e a detta camera di combustione 3 per mezzo di due piastre tubiere, una piastra tubiera posteriore 5 ed una piastra tubiera anteriore 6. Il bruciatore 111 ad esempio è un bruciatore a gas di tipo premiscelato a basse emissioni inquinanti. Figure 1 shows a heat exchanger 1 according to the present invention. Said heat exchanger 1 essentially comprises a combustion chamber 3, adapted to receive a burner 111 (Figure 9), and a plurality of exchanger tubes 4 connected to each other and to said combustion chamber 3 by means of two tube plates, a tube plate 5 and a front tube plate 6. The burner 111, for example, is a premixed gas burner with low polluting emissions.

In particolare, alla piastra tubiera posteriore 5 sono connessi sia la camera di combustione 3 che i tubi scambiatori 4, mentre alla piastra tubiera anteriore 6 sono connessi solo questi ultimi (figure 1, 3, 8). Detta piastra tubiera anteriore 6 è altresì provvista di collettore 7 (figure 1, 4) per il collegamento di una canna fumaria (non mostrata nelle figure) atta alla fuoriuscita dei prodotti di scarico della combustione. In particular, both the combustion chamber 3 and the exchanger tubes 4 are connected to the rear tube plate 5, while only the latter are connected to the front tube plate 6 (Figures 1, 3, 8). Said front tube plate 6 is also provided with manifold 7 (figures 1, 4) for connecting a flue (not shown in the figures) suitable for the discharge of the combustion exhaust products.

Ciascuno dei tubi 4 di detta pluralità di tubi 4 ha un profilo schiacciato in tutta la sua lunghezza (figure 2a, 2b), cosicché ciascuno di essi comprenderà due superfici sostanzialmente piane, una superiore 12 ed una inferiore 13, con ingombro prevalentemente lungo una sola dimensione, quella orizzontale, pur garantendo la stessa superficie di scambio che avrebbe un tubo a sezione circolare/ellittica compreso negli scambiatori di calore noti. Come è facilmente comprensibile, l’ingombro di un scambiatore di calore avente tubi 4 con profilo schiacciato risulta notevolmente ridotto (figura 3). Each of the tubes 4 of said plurality of tubes 4 has a flattened profile along its entire length (Figures 2a, 2b), so that each of them will comprise two substantially flat surfaces, an upper 12 and a lower 13, with overall dimensions mainly along a single dimension, the horizontal one, while guaranteeing the same exchange surface that a tube with circular / elliptical cross-section included in known heat exchangers would have. As can be easily understood, the size of a heat exchanger having pipes 4 with a flattened profile is significantly reduced (Figure 3).

Detti tubi scambiatori 4 comprendono altresì una pluralità deformazioni 2 atte a rendere tortuoso il percorso dei fumi attraverso il tubo scambiatore 4. In particolare, le deformazioni 2 sono realizzate sulla superficie superiore 12 e sulla superficie inferiore 13 del tubo 4 e possono avere opportune geometrie; ad esempio, dette deformazioni 2 possono essere conformate secondo segmenti obliqui rispetto alla lunghezza del tubo scambiatore 4, detti segmenti essendo sfalsati tra loro (figura 2a). Said exchanger tubes 4 also comprise a plurality of deformations 2 suitable for making the path of the fumes tortuous through the exchanger tube 4. In particular, the deformations 2 are made on the upper surface 12 and on the lower surface 13 of the tube 4 and can have suitable geometries; for example, said deformations 2 can be shaped according to oblique segments with respect to the length of the exchanger tube 4, said segments being offset from each other (Figure 2a).

Preferibilmente, i tubi scambiatori 4 (figura 7) sono disposti secondo file 8 comprendenti ciascuna almeno due tubi 4, dette file 8 essendo impilate in modo tale che i tubi 4 tra due file 8 adiacenti risultino sfalsati orizzontalmente. Inoltre, come mostrato in figura 7, i tubi 4 sono vantaggiosamente disposti sopra un unico fianco della camera di combustione 3. Preferably, the exchanger tubes 4 (Figure 7) are arranged in rows 8 each comprising at least two tubes 4, said rows 8 being stacked in such a way that the tubes 4 between two adjacent rows 8 are offset horizontally. Furthermore, as shown in Figure 7, the pipes 4 are advantageously arranged on a single side of the combustion chamber 3.

Detta camera di combustione 3 ha un corpo di forma sostanzialmente cilindrica comprendente una prima base 9 collegata a detta piastra tubiera posteriore 5 ed una seconda base 10 provvista di apposito alloggiamento 11 atto all 'inserimento del bruciatore 111 (figura 9). Un elemento di giunzione 15, connesso tra detta piastra tubiera anteriore 6 e detta seconda base 10 della camera di combustione 3, fornisce un supporto alla struttura dello scambiatore di calore 1. Said combustion chamber 3 has a substantially cylindrical body comprising a first base 9 connected to said rear tube plate 5 and a second base 10 provided with a suitable housing 11 suitable for inserting the burner 111 (figure 9). A junction element 15, connected between said front tube plate 6 and said second base 10 of the combustion chamber 3, provides a support to the structure of the heat exchanger 1.

La sezione circolare della camera di combustione 3 offre uniformità di distribuzione del calore, ottimizzandone il processo produttivo ed incrementando Γ efficienza energetica dello scambiatore di calore 1. The circular section of the combustion chamber 3 offers uniformity of heat distribution, optimizing the production process and increasing Γ energy efficiency of the heat exchanger 1.

Vantaggiosamente, lo scambiatore di calore 1 è realizzato in acciaio inossidabile. Nel funzionamento, i fumi generati dalla combustione innescata dal bruciatore 111 percorrono la piastra tubiera posteriore 5 e, attraversando i tubi scambiatori 4, giungono airintemo della piastra tubiera anteriore 6 (si vedano le frecce in figura 8); all’interno di detta piastra tubiera anteriore 6 i fumi raggiungono temperature di condensa e vengono espulsi per mezzo della canna fumaria (non mostrata in figura). In questo modo, parte del calore viene ceduta dalla camera di combustione 3 e parte viene ceduta dai tubi scambiatori 4, realizzando lo scambio di energia termica con l’ambiente circostante. Advantageously, the heat exchanger 1 is made of stainless steel. In operation, the fumes generated by the combustion triggered by the burner 111 pass through the rear tube plate 5 and, crossing the exchanger tubes 4, reach the interior of the front tube plate 6 (see the arrows in figure 8); inside said front tube plate 6 the fumes reach condensation temperatures and are expelled through the flue (not shown in the figure). In this way, part of the heat is released from the combustion chamber 3 and part is released by the exchanger tubes 4, realizing the exchange of thermal energy with the surrounding environment.

Lo scambiatore di calore 1 sopradescritto può essere utilizzato per il riscaldamento di ambienti, ad esempio in combinazione con una ventola per generare un flusso di aria calda (generatori di aria calda) o, allo stesso modo, può essere inserito come modulo in una macchina più complessa come un’unità per il trattamento dell’aria (U.T.A.). The heat exchanger 1 described above can be used for space heating, for example in combination with a fan to generate a flow of hot air (hot air generators) or, in the same way, it can be inserted as a module in a larger machine. complex as an air handling unit (U.T.A.).

In entrambe le applicazioni, grazie alla geometria dei tubi scambiatori 4 e alla loro disposizione su un unico fianco della camera di combustione 3, si ottengono al contempo un incremento dell’ efficienza termica ed una riduzione dimensionale dello scambiatore di calore 1. In both applications, thanks to the geometry of the exchanger tubes 4 and their arrangement on a single side of the combustion chamber 3, an increase in thermal efficiency and a dimensional reduction of the heat exchanger 1 are obtained at the same time.

Claims (8)

RIVENDICAZIONI 1. Scambiatore di calore (1) comprendente camera di combustione (3), atta ad accogliere un bruciatore (111), ed una pluralità di tubi scambiatori (4) connessi a detta camera di combustione (3) e tra loro per mezzo di due piastre tubiere (5, 6) delle quali almeno una provvista di un collettore (7) per l’uscita dei prodotti della combustione, detto scambiatore (1) essendo caratterizzato dal fatto che ciascun tubo (4) di detta pluralità di tubi scambiatori (4) ha un profilo schiacciato e che detta camera di combustione (3) ha un corpo di forma cilindrica. CLAIMS 1. Heat exchanger (1) comprising combustion chamber (3), suitable for housing a burner (111), and a plurality of exchanger tubes (4) connected to said combustion chamber (3) and to each other by means of two tube plates (5, 6) of which at least one is provided with a manifold (7) for the output of the combustion products, said exchanger (1) being characterized in that each tube (4) of said plurality of exchanger tubes (4 ) has a flattened profile and that said combustion chamber (3) has a cylindrical body. 2. Scambiatore di calore (1) secondo la rivendicazione 1, caratterizzato dal fatto che detti tubi scambiatori (4) comprendono una pluralità deformazioni (2) atte a rendere tortuoso il percorso dei fumi attraverso il tubo scambiatore (4). 2. Heat exchanger (1) according to claim 1, characterized in that said exchanger tubes (4) comprise a plurality of deformations (2) adapted to make the path of the fumes tortuous through the exchanger tube (4). 3. Scambiatore di calore (1) secondo le rivendicazioni 1 e 2, caratterizzato dal fatto che ciascuno di detti tubi scambiatori (4) comprende due superfici sostanzialmente piane, una superiore (12) ed una inferiore (13) e che dette deformazioni (2) sono realizzate su detta superficie superiore (12) e su detta superficie inferiore (13). 3. Heat exchanger (1) according to claims 1 and 2, characterized in that each of said exchanger tubes (4) comprises two substantially flat surfaces, an upper (12) and a lower (13) and that said deformations (2 ) are made on said upper surface (12) and on said lower surface (13). 4. Scambiatore di calore (1) secondo le rivendicazioni 1-3, caratterizzato dal fatto che dette deformazioni (2) sono conformate secondo segmenti obliqui rispetto alla lunghezza del tubo scambiatore (4), detti segmenti essendo sfalsati tra loro. 4. Heat exchanger (1) according to claims 1-3, characterized in that said deformations (2) are shaped according to oblique segments with respect to the length of the exchanger tube (4), said segments being offset from each other. 5. Scambiatore di calore (1) secondo le rivendicazioni 1-4, caratterizzato dal fatto che detti tubi scambiatori (4) sono disposti su un unico fianco di detta camera di combustione (3). 5. Heat exchanger (1) according to claims 1-4, characterized in that said exchanger tubes (4) are arranged on a single side of said combustion chamber (3). 6. Scambiatore di calore (1) secondo una qualsiasi delle rivendicazioni precedenti, caratterizzato dal fatto che detti tubi scambiatori (4) sono disposti secondo file (8) comprendenti ciascuna almeno due tubi (4), dette file (8) essendo impilate in modo tale che i tubi scambiatori (4) tra due file (8) adiacenti risultino sfalsate orizzontalmente. 6. Heat exchanger (1) according to any one of the preceding claims, characterized in that said exchanger tubes (4) are arranged in rows (8) each comprising at least two tubes (4), said rows (8) being stacked so such that the exchanger tubes (4) between two adjacent rows (8) are offset horizontally. 7. Scambiatore di calore (1) secondo una qualsiasi delle rivendicazioni precedenti, caratterizzato dal fatto che alla piastra tubiera posteriore (5) sono connessi sia la camera di combustione (3) che i tubi scambiatori (4), e che alla piastra tubiera anteriore (6) sono connessi solo i tubi scambiatori (4). 7. Heat exchanger (1) according to any one of the preceding claims, characterized in that both the combustion chamber (3) and the exchanger tubes (4) are connected to the rear tube plate (5), and to the front tube plate (6) only the exchanger tubes (4) are connected. 8. Scambiatore di calore (1) secondo una qualsiasi delle rivendicazioni precedenti, caratterizzato dal fatto che un elemento di giunzione (15), connesso tra detta piastra tubiera anteriore (6) ed una base (10) della camera di combustione (3), fornisce un supporto alla struttura dello scambiatore di calore (1).8. Heat exchanger (1) according to any one of the preceding claims, characterized in that a joint element (15), connected between said front tube plate (6) and a base (10) of the combustion chamber (3), provides support for the structure of the heat exchanger (1).
IT002086A 2013-12-13 2013-12-13 HIGH EFFICIENCY HEAT EXCHANGER FOR BOILERS AND HOT AIR GENERATORS ITMI20132086A1 (en)

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IT002086A ITMI20132086A1 (en) 2013-12-13 2013-12-13 HIGH EFFICIENCY HEAT EXCHANGER FOR BOILERS AND HOT AIR GENERATORS
RU2014149802A RU2014149802A (en) 2013-12-13 2014-12-09 HIGH EFFICIENCY HEAT EXCHANGER FOR BOILERS AND HEATERS
EP14197365.1A EP2884201A1 (en) 2013-12-13 2014-12-11 High-efficiency heat exchanger for boilers and hot air generators

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RU183751U1 (en) * 2017-12-26 2018-10-02 Общество с ограниченной ответственностью "ИнвестГрупп" Heat exchanger
AT524587B1 (en) * 2021-03-05 2022-07-15 Juergen Kiszilak PORTABLE HEATING DEVICE

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2605091A1 (en) * 1986-10-14 1988-04-15 Tecnoclima Spa Hot-air generator having a very high output
US5094224A (en) * 1991-02-26 1992-03-10 Inter-City Products Corporation (Usa) Enhanced tubular heat exchanger
US5271376A (en) * 1991-08-12 1993-12-21 Rheem Manufacturing Company Serpentined tubular heat exchanger apparatus for a fuel-fired forced air heating furnace
US20050092316A1 (en) * 2003-11-04 2005-05-05 Schonberger Marty L.Sr. Hot air furnace
WO2009095944A2 (en) * 2008-01-30 2009-08-06 Tecnoclima S.P.A. Improved hot air unit heater

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20020573U1 (en) 2002-12-10 2004-06-11 Apen Group S P A HEAT EXCHANGER GROUP AND HIGH PERFORMANCE COMBUSTION CHAMBER OR FOR BOILERS AND HOT AIR GENERATORS

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2605091A1 (en) * 1986-10-14 1988-04-15 Tecnoclima Spa Hot-air generator having a very high output
US5094224A (en) * 1991-02-26 1992-03-10 Inter-City Products Corporation (Usa) Enhanced tubular heat exchanger
US5271376A (en) * 1991-08-12 1993-12-21 Rheem Manufacturing Company Serpentined tubular heat exchanger apparatus for a fuel-fired forced air heating furnace
US20050092316A1 (en) * 2003-11-04 2005-05-05 Schonberger Marty L.Sr. Hot air furnace
WO2009095944A2 (en) * 2008-01-30 2009-08-06 Tecnoclima S.P.A. Improved hot air unit heater

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