DE212018000248U1 - Heat transfer unit, heating unit and heating device for recreational vehicles and recreational vehicles - Google Patents

Abstract

A heat transfer unit (6A) for a heating device (1) for a leisure vehicle for transferring heat from a heated gas to a liquid, in particular to water, comprising:
a gas line (60A) configured to receive and transport the heated gas; and
a heat transfer tank (504A) configured to contain the liquid, the gas line (60A) having a gas inlet (603A), a gas outlet (604A) and a first heat transfer zone (601A) surrounded by a corresponding chamber, and a second heat transfer zone (602A) surrounded by a corresponding gas tube, the chamber surrounding the first heat transfer zone (601A) being coupled to the gas inlet (603A), the gas tube surrounding the second heat transfer zone (602A) being coupled to the first Heat transfer zone (601A) is coupled chamber and the gas outlet (604A) is coupled to the gas pipe surrounding the second heat transfer zone (602A), wherein the gas line (60A) is geometrically shaped so that the gas inlet (603A) into the gas line (60A ) entering heated gas due to convection first through the first heat transfer zone (601A) and then through the second heat transfer flow zone (602A) must flow before it can leave the gas line (60A) through the gas outlet (604A),
wherein the chamber surrounding the first heat transfer zone (601A) and the gas tube surrounding the second heat transfer zone (602A) are provided within the heat transfer tank (504A), characterized in that the chamber surrounding the first heat transfer zone (601A) is provided as a triangular chamber and that second heat transfer zone (602A) surrounding gas pipe is coupled in the region of one of the corners of the triangular chamber with the triangular chamber surrounding the first heat transfer zone (601A).

Description

This invention relates to a heat transfer unit and a heating unit and a heating device with such a heat transfer unit and to recreational vehicles which are equipped with one of the above-mentioned devices.

A heat transfer unit for transferring heat from a heated gas to a liquid, particularly water, typically includes a gas line configured to receive and transfer the heated gas from, for example, a burner, and a heat transfer tank configured to he absorbs the liquid to be heated.

In known heat transfer units, moisture from the heated gas in the gas line often condenses and causes problems such as blockage of the line or oxidation of the walls that define the gas line. In addition, the condensed and accumulated water could move towards a burner and cause faults there, for example by extinguishing the combustion flames.

Accordingly, the scope of the present invention includes providing a heat transfer unit which has a high efficiency in heat transfer from the heated gas to the liquid to be heated and at the same time is quite durable and reliable compared to known systems. In addition, the scope of the present invention includes providing corresponding heating units, heating devices and leisure vehicles in accordance with the concept developed therefrom.

These goals are achieved by the heat transfer unit according to claim 1, a heating unit according to claim 5, a heating device according to claim 8 and a leisure vehicle according to claim 10.

One aspect of the present invention relates to a heat transfer unit for transferring heat from a heated gas to a liquid. Such a heat transfer unit is provided in particular for a heating device for a leisure vehicle. In accordance with the present invention, the heat transfer unit includes a gas line configured to receive and transfer the heated gas and a heat transfer tank configured to contain the liquid to be heated. The gas line has a gas inlet, a gas outlet and a first heat transfer zone which is surrounded by a corresponding chamber and a second heat transfer zone which is surrounded by a corresponding gas tube. The chamber surrounding the first heat transfer zone is coupled to the gas inlet, the gas tube surrounding the second heat transfer zone to the chamber surrounding the first heat transfer zone, and the gas outlet to the gas tube surrounding the second heat transfer zone. The gas line is geometrically shaped such that the heated gas entering the gas line at the gas inlet must first flow through the first heat transfer zone and then through the second heat transfer zone due to convection before it can leave the gas line through the gas outlet. The chamber surrounding the first heat transfer zone and the gas pipe surrounding the second heat transfer zone are provided within the heat transfer tank of the heat transfer unit. The chamber surrounding the first heat transfer zone is provided as a triangular chamber and the gas pipe surrounding the second heat transfer zone is coupled in the region of one of its corners to the triangular chamber surrounding the first heat transfer zone.

This leads to a very reliable and highly effective heat transfer unit, because on the one hand the triangular shape of the chamber suppresses the generation of turbulence in the gas flow and on the other hand there are practically no dead spaces in which moisture from the gas can condense and collect. In this way, negative effects such as oxidation effects or a blockage of the flow path of the heated gas, which are associated with condensed and accumulated moisture within the heat transfer unit, can be avoided.

The triangular chamber surrounding the first heat transfer zone preferably has a triangular bottom surface, a triangular top surface and three in particular rectangular side surfaces which connect the triangular bottom surface to the triangular top surface on the three sides of the two triangular surfaces. A gas inlet is provided along a first side surface of the triangular chamber and the gas tube surrounding the second heat exchange zone is coupled to the opposite end of the triangular chamber. In particular, the gas pipe surrounding the second heat transfer zone is coupled to the top surface of the triangular chamber in the vicinity of the point where the second side surface and the third side surface touch.

This results in a highly efficient shape with regard to a largely unobstructed gas flow and a large area for heat transfer.

The triangular hammer surrounding the first heat transfer zone is preferably arranged horizontally within the heat transfer tank. Alternatively, the triangular chamber is arranged ascending within the heat transfer tank from the first side surface of the triangular chamber to the point at which the gas pipe surrounding the second heat transfer zone is coupled to the triangular chamber.

This enables the flow characteristics of the heat transfer unit to be further improved, since the effect of the convection which drives the heated gas through the gas line is increased.

The triangular chamber surrounding the first heat transfer zone is preferably formed from two identical components which are attached to one another in a mirror-image manner to form the triangular chamber.

This enables the triangular chamber and thus the entire heat transfer unit to be produced simply and inexpensively.

Another aspect of the present invention relates to a heating unit for heating liquids and in particular water, the heating unit being provided in particular for a heating device of a leisure vehicle. The heating unit according to the invention comprises at least one of the heat transfer units described above and a burner coupled to the heat transfer unit. The burner comprises at least one burner module and a combustion chamber with an igniter. The burner module has a line with an inlet opening for receiving a mixture of primary air and fuel gas and an outlet opening that leads to the combustion chamber. In particular, the outlet opening is a row of nozzles and the line is geometrically designed so that the mixture of primary air and fuel gas is sucked in by the Venturi effect. The combustion chamber is coupled to the gas inlet of the gas line of the heat transfer unit. Alternatively, the combustion chamber of the burner is at least partially provided as a section of the triangular chamber surrounding the first heat transfer zone.

This specific configuration makes it possible to transfer the advantageous effects of the heat transfer unit described above to a heating unit. The arrangement of the outlet opening as a row of nozzles improves the distribution of the mixture of primary air and fuel gas in the combustion chamber and thus the completeness of the combustion. The use of the Venturi effect for the supply of the mixture of primary air and fuel gas into the combustion chamber makes it possible to dispense with other devices that fulfill this task. This leads to lower costs for the heating unit and less susceptibility to errors. The provision of the combustion chamber, at least partially or even the entire burner, in the triangular chamber surrounding the first heat transfer zone enables a saving of installation space and thus reduces the overall size of the heating unit. In addition, heat is not only transferred from the heated gas (the combustion gas) within the first heat transfer zone to the liquid inside the heat transfer tank, but also heat by heat radiation from the combustion flames to the walls of the triangular chamber surrounding the first heat transfer zone and thus to the liquid inside of the heat transfer tank.

Preferably, the burner includes a passageway designed to direct a flow of secondary air into the combustion chamber. In particular, a fan is provided which forces the flow of secondary air into the combustion chamber.

As a result, more air can be supplied to the combustion zone than can be reached via the line. In addition, the amount of air supplied can be regulated when the blower is provided and, if desired, the heated gas within the combustion chamber and the gas line of the heat exchanger can be pressurized with air to increase the flow rate and the temperature by regulating the amount of secondary air of the heated gas. This results in further options for operating the heating unit in accordance with the requirements of the user.

Another aspect of the present invention relates to a heating device for a leisure vehicle. The heating device according to the present invention comprises at least one of the heating units described above or a heating unit with a first burner and at least one coupled to it the heat transfer unit described above. The heating device also has an inlet for supplying the first heating unit with air and an exhaust pipe for removing the exhaust gases from the heating device.

The advantageous effects of the above-described heating units and / or of the above-described heat transfer units can thus be transferred to a heating device for leisure vehicles.

The heating device preferably further comprises an additional heating unit with a burner and a heat exchanger coupled to the additional burner. The additional heating unit is connected to the inlet and exhaust pipe of the heating device in parallel to the existing heating unit.

This configuration makes it possible to improve the performance of the entire heating device and to heat different fluids largely independently of one another with only one compact heating device. In particular, if one of the heating units provided is configured for heating gases and the other for heating liquids, a very versatile heating device is obtained.

The two heating units provided for the heating device are preferably arranged next to one another or one above the other within the heating device.

This enables a highly symmetrical and very space-saving overall shape of the heating device provided.

A last aspect of the present invention relates to a recreational vehicle, the recreational vehicle according to the invention comprising at least one of the heating devices described above, at least one of the heating units described above and / or at least one of the heat exchangers described above.

This configuration enables the advantageous effects of the heating devices, heating units and / or heat transfer units described above to be transferred to a recreational vehicle.

• 1 ein schematisches Funktionsschema einer beispielhaften Ausführungsform der Heizvorrichtung gemäß der vorliegenden Erfindung zeigt;
• 2 eine räumliche Ansicht einer beispielhaften Heizvorrichtung gemäß der Ausführungsform der 1 zeigt;
• 3 bis 6 verschiedene Querschnittsansichten der Heizvorrichtung aus 2 zeigen;
• 7A und 7B räumliche Ansichten von Heizeinheiten der Heizvorrichtung der 2 bis 6 zeigen.

These and other features of the invention will become apparent from the following detailed description of a preferred, non-limiting, exemplary embodiment of the present invention with reference to the accompanying drawings, of which:

• 1 shows a schematic functional diagram of an exemplary embodiment of the heating device according to the present invention;
• 2nd a spatial view of an exemplary heating device according to the embodiment of the 1 shows;
• 3rd to 6 different cross-sectional views of the heater 2nd demonstrate;
• 7A and 7B spatial views of heating units of the heater of the 2nd to 6 demonstrate.

With reference to the accompanying drawings, the number denotes 1 a heater according to the present invention.

According to an exemplary embodiment of the present invention, which is in 1 schematically and in the 2nd to 6 is shown in spatial views, comprises a heating device 1 a combustion unit with at least one burner and one combustion chamber 2nd . The burner has a burner module 3rd . The burner module 3rd contains a line 301 with an inlet opening 302 to hold a mixture of primary air and fuel gas. The administration 301 also has an outlet 303 leading to the combustion chamber 2nd is open to inside the combustion chamber 2nd to create a flame.

Here is the outlet opening 303 the line 301 a series of nozzles 15 configured to generate the flame. The heater 1 also contains a detonator 304 (please refer 3rd to 5 and 7A) that in the combustion chamber 2nd is positioned.

The administration 301 is geometrically configured in such a way that the Venturi effect draws in the mixture of primary air and fuel gas. In the configuration shown, the heater comprises 1 also a passage 4th (please refer 5 ), which is configured so that a flow of secondary air into the combustion chamber 2nd flows.

The heater 1 contains a channel 5 , to pump a fluid to be heated. The fluid to be heated can be a gas such as breathing air, for example.

The channel 5 has an inlet 501 and an outlet 502 (please refer 3rd to 5 ). Here contains the channel 5 a fluid pump 503 . The fluid pump 503 is configured to force the fluid through the channel 5 to flow.

Here is the fluid pump 503 configured to draw air from the recreational vehicle in which the heater shown is located and in the duct 5 from the inlet 501 to the outlet 502 pushes. The fluid pump is in an alternative embodiment 503 configured to draw air from the outside environment and force it into the duct 5 to enter. The channel 5 contains a grille in front of the fluid pump 503 is positioned to contaminate the channel 5 to avoid. The fluid pump is in the configuration shown 503 an air pump. The fluid pump 503 can also be a liquid pump.

The entrance 501 of the channel 5 also includes a filter to prevent contamination of the system. When in a recreational vehicle is the outlet 502 of the channel 5 usually open to the interior of the recreational vehicle.

The heater 1 contains a heat exchanger 6 . The heat exchanger 6 is in the version shown for the transfer of heat from heated exhaust gases coming from the combustion chamber 2nd through a gas pipe 60 of the heat exchanger flow onto that in the duct 5 flowing fluid designed. How 5 best in FIG. can be seen, has the gas line 60 of the heat exchanger 6 two heat exchange zones: a first heat exchange zone 601 , which is surrounded by a corresponding gas pipe, which is used for heat exchange between those in the combustion chamber 2nd generated heated exhaust gases within the first heat exchange zone 601 and the heated exhaust gases within a second heat exchange zone 602 is configured, and the second heat exchange zone 602 which is surrounded by a corresponding chamber, which is used for the heat exchange between the heated exhaust gases and that through the duct 5 flowing fluid to be heated is configured. The combustion zone 2nd can at least partially as a section of the first heat exchange zone 601 be provided, as is the case in the illustrated embodiment. The gas pipe 60 also has a gas inlet 603 and a gas outlet 604 . This is the first heat exchange zone 601 surrounding gas pipe is with the gas inlet 603 , the second heat exchange zone 602 with the first heat exchange zone 601 and the gas outlet 604 with the second heat exchange zone 602 surrounding chamber coupled. The gas pipe 60 is geometrically shaped so that heated exhaust gas that is at the gas inlet 603 into the gas pipe 60 occurs, first the first heat exchange zone 601 and then the second heat exchange zone 602 must flow through before it reaches the gas line 60 through the gas outlet 604 can leave.

Which is the second heat exchange zone 602 surrounding chamber and that the first heat exchange zone 601 surrounding gas pipe are in the channel 5 of the heat exchanger 6 intended.

This is the first heat exchange zone 601 surrounding gas pipe is within the the second heat exchange zone 602 surrounding chamber arranged and the gas inlet 603 is in relation to the longitudinal axis of the heat exchanger 6 radially inside the gas outlet 604 intended. This results in an improved heat exchange and a fairly compact spatial structure of the heat exchanger 6 .

It is the first heat exchange zone 601 surrounding gas pipe smooth wall and is in connection with the second heat exchange zone 602 . The second heat exchange zone 602 is designed as a channel-like chamber, the walls of which contain a large number of lamellae. As shown here, the walls are preferably provided with fins that point into the second heat exchange zone and / or with fins that face the gas line 60 show surrounding channel. Both fin groups are configured so that the heat exchange between the exhaust gases flowing through the second heat exchange zone and that through the duct 5 flowing fluid, especially the breathing air, is optimized.

Here the heater includes 1 a blower 7 configured to flow secondary air through the passageway 4th enforces.

In the embodiment shown, the heating device comprises 1 a feed chamber 8th . The feed chamber 8th is configured to take in air from the outside environment. The blower 7 is in the passage 4th or at the inlet of the feed chamber as shown here 8th to force air from the outside into the feed chamber.

The feed chamber 8th stands with the inlet 302 the line 301 in fluid communication to provide said primary air. The feed chamber 8th can also or alternatively with the passage 4th are in fluid communication to supply this secondary air.

The heater 1 includes a wall 401 with a first page 402 and a second page 403 which of the first page 402 opposite. The first page 402 limits the feed chamber 8th and the second page 403 limits the combustion chamber 2nd . The wall 401 has a variety of openings 404 that the passage 4th define. In one version, the size of the openings mentioned 404 according to the desired supply of secondary air to the combustion chamber 2nd optimized.

The heater 1 further includes a gas injector 9 . The gas injector 9 is for the injection of the fuel gas into the inlet 302 the line 301 configured. Here is the gas injector 9 inside the feed chamber 8th positioned.

The gas injector 9 is on a gas tank 901 connected, which is configured for the storage of the fuel gas. The gas tank is in the version shown 901 in the feed chamber 8th positioned.

The wall 401 is in the vertical direction V , aligned parallel to the weight. The administration 301 is at least at its end in the horizontal direction H stretched perpendicular to the weight.

The blower 7 is designed so that the flow of secondary air into the combustion chamber 2nd essentially in the horizontal direction H is forced into it.

The burner can, as shown, one or more parallel burner modules 31 include (see 7A) . The other parallel burner modules 31 each comprise a parallel line 311 . Each of the parallel lines 311 has an inlet opening 312 for receiving the mixture of primary air and fuel gas and an outlet opening 312 leading to the combustion chamber 2nd is open to a flame in the combustion chamber 2nd to create. Here is each of the parallel lines 301 and 311 geometrically configured so that the mixture of primary air and fuel gas is sucked in through the Venturi effect. The parallel burner modules 31 are parallel to said burner module 3rd arranged. The feed chamber 8th is in fluid communication with the inlet opening 312 of the one or more parallel lines 311 . In the version shown are the inlet openings 312 of the one or more parallel lines 311 inside the feed chamber 8th arranged.

The device comprises a parallel gas injector 91 for each of the one or more parallel burner modules 31 . The parallel gas injectors 91 are configured so that the fuel gas enters the inlet openings 312 of the one or more parallel lines 311 is fed.

Here are the parallel gas injectors 91 also inside the feed chamber 8th positioned and with the gas tank 901 connected.

The passage 4th is configured so that the secondary air at the outlet of one or more parallel lines 311 into the combustion chamber 2nd flows.

The device preferably also contains a parallel detonator 314 for each parallel burner module 31 .

Here the flow of secondary air flows into the line from the outside 301 and into the one or more parallel lines 311 .

In the embodiment shown, the heating device comprises 1 an additional burner with an additional combustion chamber 2A . The additional burner comprises at least one additional burner module 3A with an additional line 301A . The additional line 301A has an inlet opening 302A to accommodate an additional mixture of primary air and additional fuel gas, an outlet opening 303A that to the additional combustion chamber 2A and a detonator 3044A is open to a flame in the additional combustion chamber 2A to create.

Here the heater includes 1 also an additional pass 4A . The additional passage 4A is configured to allow an additional flow of secondary air into the additional combustion chamber 2A flows.

The heater 1 also includes an additional wall 401A with a first page 402A and a second page 403A that the first page 402A opposite. The first page 402A the additional wall 401A limits the additional feed chamber 8A and the second page 403A the additional wall 401A limits the additional combustion chamber 2A . The additional wall 401A has a variety of openings 404A that the additional passage 4A define. The size of said openings in the additional wall 401A is according to the desired additional flow of secondary air to the additional combustion chamber 2A optimized.

The heater 1 contains an additional channel 5A to convey an additional fluid to be heated. The additional fluid to be heated can be, for example, a liquid such as water.

The additional channel 5A has an inlet 501A , an outlet 502A and is at least partially as a heat transfer tank 504A executed. Here the heating device contains an additional fluid pump. The additional fluid pump is configured to pass the additional fluid through the additional channel 5A from the inlet 501A to the outlet 502A flows. In the version shown, the additional pump is a liquid pump.

The heater 1 also contains a heat transfer unit 6A that is configured to extract heat from the exhaust gases through a gas pipe 60A the heat transfer unit 6A flow, transfers to the additional fluid that through the additional channel 5A flows.

The gas pipe 60A the heat transfer unit 6A has a gas inlet 603A , a gas outlet 604A and two zones: a first heat transfer zone 601A is used to transfer heat from the heated exhaust gases, which is in the additional combustion chamber 2A generated on the fluid within the additional channel 5A , here in the form of a heat transfer tank 504A , especially water inside the heat transfer tank 504A of the additional channel 5A is configured, which is surrounded by a corresponding chamber. A second heat transfer zone 602A is also used to transfer heat from the heated exhaust gases to the additional combustion chamber 2A are generated on fluid, especially water within the heat transfer tank 504A the additional line 5A is configured, and is surrounded by a corresponding gas pipe. The additional combustion zone 2A can at least partially as a section of the first heat transfer zone 601A be provided. The first heat transfer zone 601A surrounding chamber is with the gas inlet 603A which is the second heat transfer zone 602A surrounding gas pipe with the first heat transfer zone 601A surrounding chamber and the gas outlet 604A with which the second heat transfer zone 602A surrounding gas pipe coupled.

The gas pipe 60A is geometrically shaped so that it is at the gas inlet 603A into the gas pipe 60A heated gas entering due to convection first the first heat transfer zone 601A and then the second heat transfer zone 602A must flow through before it reaches the gas line 60A through the gas outlet 604A can leave. The first heat transfer zone 601A surrounding chamber and the second heat transfer zone 602A surrounding gas pipes are inside the heat transfer tank 504A of the additional channel 5A intended.

According to the present invention, this is the first heat transfer zone 601A surrounding chamber is provided as a triangular chamber and the second heat transfer zone 602A The surrounding gas pipe is in the area of one of its corners with the first heat transfer zone 601A surrounding triangular chamber coupled.

In the embodiment shown, the triangular chamber surrounding the first heat transfer zone is composed of two identical, mirror-image-coupled components which form a top surface, a bottom surface and the rectangular side surfaces, the gas inlet 603A with one of the side surfaces and that is the second heat transfer zone 602A surrounding gas pipe is coupled to the corner of the triangular chamber, which is the location of the gas inlet 603A opposite. Although this configuration has many advantages in terms of the gas flow achieved, other configurations such as triangular side surfaces would also be possible.

The triangular chamber is inside the heat transfer tank 504A horizontally aligned, but can also be provided inclined to improve the effect of convection on the heated gas.

Here the heater includes 1 an additional blower 7A configured to block the additional flow of secondary air through the additional passageway 4th forces.

In the embodiment shown, the heating device comprises 1 an additional feed chamber 8A configured to take in air from the outside environment. The additional blower 7A is within the passage 4th or as shown here at the inlet of the additional feed chamber 8A provided to allow air from the outside environment into the feed chamber 2A to press.

The additional feed chamber 8A is in fluid communication with the inlet 302A the additional line 301A to deliver the named primary air. The additional feed chamber 8A can also or alternatively with the additional passage 4A are in fluid communication to produce this additional flow of secondary air.

The heater 1 also includes an additional gas injector 9A . The additional gas injector 9A is for the injection of the additional fuel gas into the inlet 302A the additional line 301A configured. Here is the additional gas injector 9A inside the additional feed chamber 8A positioned.

The additional gas injector 9A comes with an additional gas tank 901A connected, which is configured for the storage of the additional fuel gas. The additional gas tank is in the version shown 901A inside the additional feed chamber 8A positioned.

In one version is the additional wall 401A in the vertical direction V oriented. The additional line 301A is at least at its end in the horizontal direction H extended.

The additional blower 7A is designed so that the additional flow of secondary air into the additional combustion chamber 2A essentially in the horizontal direction H is enforced.

The heater 1 also includes at least one feed mouth 10th that communicates with the outside environment. The at least one feed mouth 10th has a main entrance 101 that is open to the outside environment. The at least one feed mouth 10th also has an outlet that goes over the blower 7 with the feed chamber 8th and / or an additional outlet, which is via the additional fan 7A with the additional feed chamber 8A communicates.

An electrical circuit board 12th is inside the at least one feed mouth 10th positioned.

The heater 1 also includes an exhaust pipe 11 .

The combustion chamber 8th and the additional combustion chamber 8A stand over the corresponding combustion chambers 2nd and 2A and the gas lines 60 and 60A of the corresponding heat exchanger 6 or the heat transfer unit 6A with the exhaust pipe 11 in fluid communication. The exhaust pipe 11 has an open end.

As shown, the exhaust pipe is 11 partly from the main entrance 101 the at least one feed mouth 10th surrounded so that through the exhaust pipe 11 Exhaust gases flowing heat into the at least one feed opening 10th Release incoming air to the overall heater efficiency 1 to increase.

The heater 1 also contains for each parallel burner module 31 a gas valve 13 and a parallel gas valve 131 . The gas valve 13 is to the gas injector 9 and the parallel gas valves 131 to the parallel gas injectors 91 connected.

The heater 1 contains an additional gas valve that comes with the additional gas injectors 9A connected is.

The heater 1 includes a single control unit attached to the blower 7 connected. The control unit is also connected to the additional blower 7A and the gas injector 9 connected. The control unit is also connected to the additional gas injectors 9A , the fluid pump 503 and the additional fluid pump 503A connected.

The control unit is for the control and coordination of the fan 7 , the gas injector 9 and the fluid pump 503 and the additional blower 7A , the additional gas injector 9A and the additional fluid pump 503A designed.

The heater shown 1 contains a fluid temperature sensor for measuring the temperature of the fluid (preferably the air). The fluid temperature sensor may be mounted inside the recreational vehicle in which the heater is housed to measure the temperature of the fluid (air) inside the recreational vehicle. Alternatively, the fluid temperature sensor can also be provided outside the recreational vehicle in order to measure the temperature of the fluid (air) outside the recreational vehicle. The fluid temperature sensor is connected to the control unit.

Here the heater includes an additional fluid temperature sensor to measure the temperature of the additional fluid (preferably water). The additional fluid temperature sensor is located in a water tank that contains the water that is to be supplied to the heating device. The additional fluid temperature sensor is also connected to the control unit.

The control unit is on the gas valve 13 and the parallel gas valves 131 as well as connected to the additional gas valve.

The control unit is with the blower 7 connected and configured to run the blower 7 controls, the control unit being programmed to control the blower 7 controls depending on at least one control parameter, the control parameter being representative of a thermal output provided by the burner. The control parameters can be set (directly or indirectly) by the user via an interface. The control parameters can also be derived as a function of a set temperature (which can be set by the user via the interface) and a measurement variable which can be representative of the temperature of the fluid to be heated (or an additional fluid) (at the inlet of the heater) . As shown, the burner preferably includes a plurality of burner modules (e.g., 2, 3, 4, or more); here suppose it contains N Modules; is heater is configured so that it switches on a subset of the plurality of burner modules and leaves the others off. In this case, the control parameter for a number (any natural number from 0 to N ), which corresponds to the number of burner modules to be switched on, whereby the others must be switched off (or vice versa). The same functions may (or may not) be provided for the additional burner.

In the illustrated embodiment, the control unit is also programmed to receive (from the fluid temperature sensor) the temperature of the fluid in order to compare it with a target temperature of the fluid. The target temperature of the fluid can be set by the user. The control unit is also programmed to receive (from the additional fluid temperature sensor) the temperature of the additional fluid to compare with the target temperature of the additional fluid. The target temperature of the additional fluid can be set by the user. The control unit is programmed to control the burner and one or more of the burner modules 3rd switches on or off (optional) if the temperature of the fluid is lower than the set temperature of the fluid. The control unit is programmed to control the additional burner and one or more of the additional burner modules 3A (optional) turns on or off when the temperature of the additional fluid is lower than the target temperature of the additional fluid.

The control unit is programmed to control the burner by using one or more of the burner modules 3rd , 31 turns off when the temperature of the fluid is equal or higher than the target temperature of the fluid. In one embodiment, the control unit is programmed to control the additional burner and one or more of the additional burner modules 3A turns off when the temperature of the additional fluid is equal to or higher than the target temperature of the additional fluid.

The heater has a panel on which the user can see the number of burner modules 3rd , 31 which he wants to switch on or off can be set manually. In addition, the heater contains a panel in which the user can see the number of additional burner modules 3A which he wants to switch on or off can be set manually.

The number of burner modules switched on (or switched off) 3rd , 31 provides a parameter that is representative of the thermal output provided by the burner. The difference between the target temperature of the fluid (air) and the measured temperature of the fluid (air) provides a further parameter that is representative of a thermal output provided by the burner.

The number of additional burner modules switched on (or switched off) 3A represents a parameter that is representative of a thermal output provided by the additional burner. The difference between the target temperature of the additional fluid (water) and the measured temperature of the additional fluid (water) provides a further parameter that is representative of a thermal output provided by the additional burner.

The control unit is configured in such a way that it receives at least one parameter which is representative of the thermal output provided by the burner and a parameter which is representative of the thermal output provided by the additional burner.

The control unit is on the blower 7 connected and configured so that the blower 7 is controlled as a function of at least one parameter which is representative of a thermal output provided by the burner.

The control unit is also connected to the additional blower 7A connected and configured so that the additional blower 7A is controlled as a function of at least one parameter which is representative of a thermal output provided by the additional burner.

The control unit switches the burner modules 3rd , 31 by opening the gas valve 13 one and the burner module 3rd by closing the gas valve 13 out. The control switches the additional burner module 3A by opening the additional gas valve and switching on the additional combustion module 3A by closing the additional gas valve.

The present invention extends to a heat exchanger, a heating unit with such a heat exchanger, a heating device with such a heat exchanger and / or such a heating unit and to a leisure vehicle, comprising a heating device 1 , one of the described heating units, the described heat exchanger and / or the described heat exchanger.

The heater 1 can be attached outside of the recreational vehicle, such as on the roof of the recreational vehicle.

Some further preferred features and some explanations are given below.

The burner (the burner module 3rd ) an atmospheric burner, that is, the burner does not in itself require a premixing unit in order to provide the air-gas mixture to be supplied to the burner itself.

The burner (the burner module 3rd ) a step burner or a ramp burner, which is an inexpensive commercial component.

The gas injector is preferably 9 in the immediate vicinity of the inlet opening 302 the line (preferably less than 60 millimeters, more preferably less than 20 millimeters from the entrance of the tube).

The administration 301 has at its inlet opening 302 preferably an extension that is oriented (elongated) along a first axis. One version is the gas injector 9 aligned along this first axis, which is essentially aligned with the extension of the burner located near the inlet opening 302 the line 301 located.

At the inlet opening 302 the line 301 becomes (primary) air together with that from the injector 9 supplied gas naturally sucked; the air-gas mixture is thus naturally to the inlet opening 302 the line 301 delivered by the Venturi effect.

They are preferably at the outlet opening 303 the line 301 provided nozzles (openings 404 ) aligned in the respective second axis. In one embodiment, the second axes of the nozzles are parallel to one another. In another embodiment, the second axes of the nozzles are transverse (perpendicular) to the first axis. In one embodiment, the second axes are oriented in a plane that includes the first axis.

The primary air is necessary to have combustion in an ignition area, the secondary air is supplied to the flames around the Optimize combustion efficiency to reduce harmful emissions and control the temperature of the combustion chamber.

The fluid to be heated is preferably breathing air. The air that people will breathe in the recreational vehicle is intended for breathing air. In addition, the fluid to be heated is water. Water is the water that people in the recreational vehicle will use for sanitary purposes, cleaning or cooking.

The primary air is preferably drawn in naturally by the Venturi effect, while the secondary air is forced in by the fan. This combination of natural and forced suction improves the efficiency and flexibility of the heater.

The feed chamber preferably has a cross section (size) transverse to the conveying direction, which is significantly larger (for example at least three times, preferably at least five times, for example approximately ten times) than the cross section of the inlet opening of the line (for primary air and gas). In a preferred embodiment, the feed direction is transverse to the first axis (along which the inlet of the tube extends).

The number of burner modules is preferred 3rd , 31 greater than the number of additional burner modules 3A .

In a preferred embodiment, in which the fluid is breathing air and the additional fluid is water, the number of burner modules is 3rd , 31 (for heating the air) three and the number of additional burner modules 3A (for heating the water) one. This version reflects the average need for warm air and warm water in a recreational vehicle.

The structure of the heater 1 , with two separate combustion chambers 2nd and 2A and two separate heat exchangers 6 or heat transfer units 6A , one of which is intended for water and the other for air, gives the device a high degree of flexibility and good efficiency. In fact, it is possible to heat air, but not water, and water, but not air.

Preferably the heater is 1 Can be attached to the roof of the recreational vehicle. This placement outside the recreational vehicle is possible due to the high efficiency of the device 1 and due to the mainly horizontal extent of the device 1 , thanks to the fan configured for the flow of secondary air in the horizontal direction. This placement outside the recreational vehicle results in having more space inside the recreational vehicle.

Preferably the heater is 1 equipped with an automatic frost protection valve. The automatic frost protection valve is connected to a water circuit, which also includes the additional line. The automatic frost protection valve is configured in such a way that it opens automatically when the recreational vehicle is parked in response to cold detection and the water can drain off. This property prevents freezing from damaging the water cycle.

The automatic frost protection valve is configured so that it closes again automatically when the water circuit is empty. This function avoids that someone has to close the valve.

Reference list

1:

Heater

2:

Combustion chamber

2A:

additional combustion chamber

3:

Burner module

301:

management

302:

Inlet opening

303:

Outlet opening

304:

Detonator

31:

parallel burner module

311:

parallel line

312:

Inlet opening

313:

Outlet opening

314:

Detonator

3A:

additional burner module

301A:

additional line

302A:

Inlet opening

303A:

Outlet opening

304A:

Detonator

4:

Continuity

401:

wall

402:

first page

403:

second page

404:

opening

4A:

additional passage

401A:

additional wall

402A:

first page

403A:

second page

5:

channel

501:

inlet

502:

Outlet

503:

Fluid pump

5A:

additional channel

501A:

inlet

502A:

Outlet

503A:

additional fluid pump

504A:

Heat transfer tank

6:

Heat exchanger

60:

Gas pipe

601:

first heat exchange zone

602:

second heat exchange zone

603:

Gas inlet

604:

Gas outlet

6A:

Heat transfer zone

60A:

Gas pipe

601A:

first heat transfer zone

602A:

second heat transfer zone

603A:

Gas inlet

604A:

Gas outlet

7:

fan

7A:

additional blower

8th:

Feed chamber

8A:

additional feed chamber

9:

Gas injector

901:

Gas tank

9A:

additional gas injector

901A:

additional gas tank

91:

parallel gas injector

10:

Feed mouth

11:

Exhaust pipe

101:

Main entrance

12:

electrical circuit board

13:

Gas valve

131:

parallel gas valve

H:

horizontal direction

V:

vertical direction

Claims (10)

A heat transfer unit (6A) for a heater (1) for a recreational vehicle for transferring heat from a heated gas to a liquid, particularly water, comprising: a gas conduit (60A) configured to receive and transport the heated gas; and a heat transfer tank (504A) configured to contain the liquid, the gas conduit (60A) having a gas inlet (603A), a gas outlet (604A) and a first heat transfer zone (601A) surrounded by a corresponding chamber , and having a second heat transfer zone (602A) surrounded by a corresponding gas tube, the chamber surrounding the first heat transfer zone (601A) being coupled to the gas inlet (603A), the gas tube surrounding the second heat transfer zone (602A) to the die the first heat transfer zone (601A) is coupled to the chamber and the gas outlet (604A) is coupled to the gas pipe surrounding the second heat transfer zone (602A), the gas line (60A) being geometrically shaped such that the gas inlet (603A) enters the gas line ( 60A) entering heated gas due to convection first through the first heat transfer zone (601A) and then through the second heat transfer transfer zone (602A) must flow before it can leave the gas line (60A) through the gas outlet (604A), the chamber surrounding the first heat transfer zone (601A) and the gas pipe surrounding the second heat transfer zone (602A) being provided within the heat transfer tank (504A) characterized in that the chamber surrounding the first heat transfer zone (601A) is provided as a triangular chamber and the gas pipe surrounding the second heat transfer zone (602A) is coupled in the region of one of the corners of the triangular chamber to the triangular chamber surrounding the first heat transfer zone (601A) is. Heat transfer unit (6A) Claim 1 , wherein the triangular chamber surrounding the first heat transfer zone (601A) has a triangular bottom surface, a triangular top surface and three in particular rectangular side surfaces which connect the triangular bottom surface to the triangular top surface on the three sides of the two triangular surfaces, a gas inlet (603A) is provided along a first side surface of the triangular chamber, and wherein the gas tube surrounding the second heat transfer zone (602A) has the opposite end of the triangular chamber and in particular the top surface of the triangular chamber in is connected near the place where the second side surface and the third side surface touch each other. Heat transfer unit (6A) Claim 2 , wherein the triangular chamber surrounding the first heat transfer zone (601A) is arranged horizontally within the heat transfer tank, or wherein the triangular chamber within the heat transfer tank (504A) from the first side surface of the triangular chamber to the position where the second heat transfer zone (602A) surrounding gas pipe is coupled to the triangular chamber, is arranged ascending. Heat transfer unit (6A) according to any one of the preceding claims, wherein the triangular chamber surrounding the first heat transfer zone (601A) is formed from two identical components which are attached to one another in mirror-image relationship to one another to form the triangular chamber. Heating unit for heating liquid for a heating device (1) of a recreational vehicle, the heating unit comprising: a heat transfer unit (6A) according to any one of the preceding claims; and a burner coupled to the heat transfer unit (6A), the burner comprising at least one burner module (3A) and a combustion chamber (2A) with an igniter (304A), wherein the burner module (3A) has a line (301A) with an inlet opening (302A) for receiving a mixture of primary air and fuel gas, and an outlet opening (303A) leading to the combustion chamber (2A), the outlet opening (303A) in particular a series of Is nozzles and the line (301A) is in particular geometrically designed such that the mixture of primary air and fuel gas is sucked in by the Venturi effect, wherein the combustion chamber (2A) is coupled to the gas inlet (603A) of the gas line (60A) of the heat transfer unit (6A) or wherein the combustion chamber (2A) of the burner is at least partially provided as a section of the triangular chamber surrounding the first heat transfer zone (601A). Heating unit after Claim 5 , wherein the burner has a passage (4A) which is designed such that it directs a flow of secondary air into the combustion chamber (2A), and in particular a blower (7A) which is designed such that it the flow of secondary air into the combustion chamber (2A), near or within the passage (4A). A heating device (1) for a recreational vehicle, comprising: a first heating unit according to one of claims 5 and 6, or a first heating unit with a first burner and a heat transfer unit (6A) coupled therewith according to one of the preceding claims 1 to 4; a main inlet (101) for supplying air to the first heating unit; and an exhaust pipe (11) for discharging exhaust gases from the heating device (1). Heater (1) after Claim 7 , further comprising: an additional heating unit with a burner and a heat exchanger (6) coupled to the additional burner, the additional heating unit being connected to the main inlet (101) and the exhaust pipe (11) of the heating device (1) in parallel with the first heating unit. Heating device (1) according to one of the preceding claims 7 and 8, wherein the first heating unit and the second heating unit in the heating device (1) are arranged side by side or one above the other. Leisure vehicle, comprehensive a heating device (1) according to one of the preceding claims 7 to 9, a heating unit according to one of the preceding claims 5 and 6 and / or a heat transfer unit (6A) according to one of the preceding claims 1 to 4.

Images