DE102007002878B3 - Heating arrangement for building, has two flow channels thermally contacting with each other and wall section of one channel forms limited wall for channel, where channels are arranged partially about outer periphery of passage tube - Google Patents

Abstract

The arrangement (1) has a passage tube (2) for discharging a heated gaseous medium, and a flow channel (4) arranged partially about an outer periphery of the tube and for heating a fluid medium, where the channel thermally contacts the tube. Another flow channel (6) is arranged partially about the outer periphery of the tube (2) and allows another fluid medium to flow through, where the mediums are separated from each other. The channels thermally contact with each other and a wall section of the channel (6) forms a limited wall for the channel (4). An independent claim is also included for a procedure for heating areas.

Description

The The present invention relates to a heating arrangement for buildings. such Heating arrangements have long been known in the art. In some heating arrangements by a burner is a circulating liquid, such as water, heated. In this combustion process arise hot Exhaust gases, usually over a Flue pipe or a fireplace are led to the outside. These Exhaust gases still have a considerable amount of heat, which therefore is wasted outward arrives. From the prior art are various devices known to the heat to use this exhaust.

For example, from the DE 201 03 124 a device for heat recovery from flue gases is known, which is arranged in the train of a chimney, said device having a liquid-flowed heat exchanger. However, this device is very difficult to access, for example, in the case of repairs and difficult to install.

From the US 4,206,805 a device for recovering heat from heat generators is known. In this case, a water-filled pipe system is placed around a heated body, such as a heated pipe. However, this device is also very expensive in the installation.

From the DE 10 2004 023 026 Al For example, a heat exchanger system for any heat generator is known. In this case, an exhaust pipe is provided with a sheath which leads a liquid heat carrier and is in communication with a heat user. This device may also include a temperature sensor and a temperature-controlled valve which causes air to be forced into the heat circuit when the liquid in the jacket overheats. Thus, however, this device requires an active element, such as a compressor, and thus an electrically operated element. Thus, this system, for example, in the event of a power failure is not able to prevent occurring overheating of the liquid to be heated.

The US 2003/0056944 A1 describes a heat exchanger which is arranged on a region of an exhaust pipe. In this case, two tubes are provided, which are wound together around the exhaust pipe.

Of the present invention is based on the object, a heating arrangement to disposal to provide, which allows an improved heat exchange.

This is inventively a heating arrangement according to claim 1 and a method for heating of spaces achieved according to claim 14. Advantageous embodiments and developments are Subject of the dependent claims.

The Heating arrangement according to the invention for building points a passage pipe for discharging a heated one gaseous Medium on. Furthermore, a first flow channel is provided which at least partially around the outer circumference of the passage tube is arranged and within which a first liquid Medium flow can, with this first flow channel at least partially in thermal contact with the draft tube stands.

According to the invention is a second flow channel provided, wherein the second flow channel a Tube is at least partially around the outer circumference of the passage tube is arranged and can flow within a second liquid medium, wherein the first liquid Medium and the second liquid Medium separated from each other by the flow channels are and the first flow channel and the second flow channel in thermal contact with each other. Furthermore forms a wall section of the second flow channel forming tube at the same time a limiting wall for the first Flow channel.

at the said liquids it is preferably water, wherein in the first flow channel the heating water flows, which for heat recovery is thought and in the second flow channel at least temporarily the cooling water can flow.

at the flow channel On the one hand, it may be pipes or the like within which liquid flow can. However, it is also possible that the channel is formed by different communicating walls will, that is for example, by an outer wall of the passage tube and through an outer wall of another flow channel. For example, it is also possible that is a flow channel between the passage tube, an outer tube surrounding the passage tube and the other flow channel extends. The thermal contact between the passage pipe and the flow channel here comes in particular through the wall portion of the passage tube which also includes the flow channel limited.

As already mentioned, the first flow channel serves to guide the heating water, that is, the water flowing through this first flow channel is heated by the exhaust gases flowing through the passage pipe. In particular, in the case of a system failure, for example, to a standstill of Water in the first flow channel leads can be sent through the second flow channel cooling water to prevent overheating of the liquid in the first flow channel. For this purpose, the two flow channels are in thermal contact with each other to ensure the best possible heat transfer. The first flow channel is preferably arranged on the pull-through tube such that it is in thermal contact with this pull-through tube.

Preferably is the second flow channel Pipe, which around the outer circumference the passage tube is arranged. In this embodiment becomes the first flow channel through the wall or the outer circumference of the passage tube, an outer tube and the second flow channel educated.

at this preferred embodiment thus forms a wall portion of the tube at the same time a limiting Wall for the first flow channel. This is in this embodiment the first flow channel and the second flow channel over this Wall section in thermal contact.

Preferably extends the second flow channel spirally around the outer circumference of the passage pipe. In this way, a particularly favorable heat exchange between the two flow channels possible. It would be however also insofar other variants conceivable, for example a variant, at the second flow channel longitudinal along the passage pipe, is bent at an end portion of the passage pipe by 180 ° and runs back, wherein this process around the outer circumference the passage pipe is continued. Preferably, the passage pipe a circular one Cross-section and particularly preferred is the second flow channel also with circular Cross section formed.

at In a further advantageous embodiment, the first flow channel through gaps formed between the individual turns of the second flow channel. In this way becomes the liquid in the first flow channel also spiral guided around the passage pipe, so that in this way a particularly favorable heat exchange both between the two flow channels as also between the first flow channel and the passage pipe possible is.

at a further preferred embodiment is the flow area of the second flow channel less than the flow area of the first flow channel. It should be remembered that the second flow channel only in case of need for cooling the liquid in the first flow channel is used.

at a further preferred embodiment is radially outside the flow channels an outer tube intended. In this way, the first flow channel can be particularly advantageous between the inner wall of this outer tube and the outer wall the passage tube are formed.

at A further advantageous embodiment is a temperature sensor for measuring the temperature of the liquid flowing in the first flow channel intended. This temperature sensor is used to control the water cycle, the first flow channel includes. In response to one of these, preferably, electrically operated sensor output signal, for example, a Pump can be activated, which the water through the flow channel drives or in the first flow channel Boosts heated water into a customer like a floor heating system.

Besides In a further preferred embodiment, the device a temperature sensor on. This temperature sensor may also be an electrically operating element, but is preferred a non-electrically operated element, which thus also in the currentless Condition works. The temperature sensor can also be in the first flow channel but also in the second flow channel or elsewhere, especially in an upper area be arranged of the passage tube. In a preferred embodiment causes the temperature sensor in response to overheating the water in the first flow channel a cooling through the second flow channel. So it is possible that the temperature sensor an expanding fluid that causes from a certain limit temperature that the second flow channel open and thus a cooling is effected. Specifically, by the expansion of the in the temperature sensor provided liquid causes a valve to open, which in turn causes a Flow through the second flow channel is initiated.

If So this temperature sensor If the temperature is too high, countermeasures can be taken or cooling measures be initiated. Thus, this temperature sensor is part of an overheating protection.

Prefers also has the second flow channel a valve on. This valve is particularly preferred with the temperature sensor coupled and can be opened in response to too high a temperature, to a coolant, especially cool Water, through the second flow channel to lead.

at a further embodiment is, as stated above, provided a control device, in response to a signal output from the temperature sensor Valve, which is particularly preferably a solenoid valve acts, controls. In this case, the controller can also be designed in such a way that a cooling until the temperature of the heating water drops again has dropped a predetermined setpoint.

at A further advantageous embodiment is the second flow channel with a fluid supply line connected. These may be, for example, liquid reservoirs, which in the roof of a building are provided, act or even a faucet or the like. Basically it would be too possible, the second flow channel to connect with a pump, which is activated if necessary. In many countries However, such security devices, which are also the Availability of electrical energy, not permitted.

at In another advantageous embodiment, the liquids in the two flow channels in each other guided in the opposite direction. In this way can be a uniform and particularly efficient cooling the liquid in the first flow channel be made. The liquid in the first flow channel has at the upper region of the flow channel or of the passage pipe the highest Temperature, because it has been heated here the longest. If vice versa the cooling liquid is introduced from above, the cooling liquid has a correspondingly lower Temperature on and thus a particularly efficient cooling is possible.

Preferably the second flow channel is permanent with liquid filled. in principle would it be also possible, the second flow channel Normally empty and only in case of cooling with a coolant to flow through. The permanent filling however, has the advantage that overheating of the second flow channel for example, the wall of the passage tube is prevented. Preferably is the first flow channel in Connection with a heat reservoir, that is, the into the liquid introduced in the first flow channel Heat is continue to warm of spaces used. The passage pipe is particularly preferred around an exhaust pipe of a heater.

The The present invention further relates to a heating system with directed to a heating arrangement of the type described above. These Heating system particularly preferably has a burner.

The The present invention is further directed to a method of heating of spaces directed, being a passage pipe, which of heated air flows through becomes, a first liquid in a first flow channel flows and heated by thermal contact with the passage tube. According to the invention the passage tube at least temporarily a second liquid medium in a second flow channel guided and this second liquid is used for cooling the first liquid used. The cooling preferably takes place via a thermal contact between the two flow channels or the respective liquids.

Further Advantages and embodiments emerge from the attached Drawings:

In this demonstrate:

1 A block diagram of a heating system;

2 A plan view of a heating arrangement according to the invention;

3 A side view of the heating system 2 ;

4 A top view of the heating system 2 ;

5 A partial view of the heating arrangement 1 ; and

6 a further partial view of the heating arrangement 1 ,

1 shows a block diagram of a heating system 20 , This heating system 20 has a burner 21 on. The resulting during combustion of heated gases pass through a passage pipe 2 outward along the arrow P1. One above the burner 21 arranged heat exchanger is not shown. The reference number 1 refers to the heating device according to the invention, in order to also use the heat of the heated exhaust gas. This heating arrangement is in 1 also not shown in detail, however, has an inlet 14 and a return 12 for the water to be heated. These feeds and returns can in turn be connected to a heat reservoir, for example, to heat service water. The reference numerals 13 and 15 refer to an inflow and outflow for the cooling water.

2 shows a plan view of a heater according to the invention 1 , One recognizes that around the passage pipe 2 an outer tube 8th is arranged. This outer tube 8th is at the top and bottom Closed at the end, so that between this outer tube and the passage tube 2 apart from the inlets and outlets forms a closed volume. At the in 2 shown embodiment, both the passage pipe 2 as well as the outer tube 8th a circular cross section. reference numeral 6 characterized a second flow channel for a cooling medium, for example for cooling water. The cooling water passes through an inflow 13 in the second flow channel 6 and can flow down from there to a drain 15 , This flows at the in 2 As shown, the cooling water from top to bottom and is thus basically independent of pumps or similar equipment.

This second flow channel 6 is preferably both on the passage pipe 2 as well as on the outer tube 8th at. In this way arises between the individual turns 6a or spirals of the second flow channel 6 in each case a likewise spiral-shaped intermediate space, which is connected to the outer tube and the passage tube 2 the first flow channel 4 forms. Through the first flow channel 4 is the water to be heated, starting from the inlet 14 up to the return 12 directed.

The material of the first flow channel is chosen so that there is a good heat transfer between the cooling medium in the second flow channel and the liquid in the first flow channel 4 allowed.

At the in 2 the embodiment shown, the second flow channel 6 or the tube has a circular cross section. However, it would also be possible for the second flow channel 6 provide other cross sections, such as a rectangular cross section or the like. In this way, at similar or substantially the same flow cross section, the contact surfaces to the first flow channel 4 increase. As already mentioned, the two liquids in the two flow channels 4 and 6 in the opposite direction, that is, in the countercurrent principle transported. Reference P1 denotes the flow direction of the flue gas through the passage pipe 2 ,

The reference number 7 refers to a temperature sensor that measures the temperature of the water to be heated. Here is this temperature sensor 7 preferred as in 2 shown at the top of the passage tube 2 arranged. Since the heating water flows from bottom to top, it has its highest temperature at the upper end of the passage pipe 2 on and thus the temperature sensor is particularly favorable at the upper end of the passage tube 2 arranged. In response to a signal of the preferably electrically operating temperature sensor, the water cycle through the first flow channel 4 be managed. The reference character L denotes the longitudinal direction of the passage tube 2 ,

The reference number 17 refers to a sensor for the safety valve or a temperature sensor. As soon as the temperature sensor 17 registers a too high temperature of the heating water, a (not shown in detail) valve is opened, which causes cooling water through the second flow channel 6 flows from top to bottom.

3 shows a side view of in 2 shown heater. One recognizes beside the in 2 Components shown a vent or a ventilation device 19 at the upper end of the first flow channel 4 or at the derivative 12 ,

The reference number 14 shows the inlet for the water to be heated. This feed 14 indicates at the in 3 embodiment shown a conical tip 14a on to the water to be heated particularly advantageous in the spaces between two coils or turns 6a of the second flow channel 6 to contribute. The outer diameter of the second flow channel 6 or the corresponding pipe 6 is at the in 2 shown embodiment about 12 mm. The distance between two windings lying in the longitudinal direction L of the pull-through tube 6a is correspondingly in a range between 36 and 40 mm. In general, the ratio between the flow cross section of the first flow channel and the flow cross section of the second flow channel is between 2: 1 and 10: 1, preferably between 2.5: 1 and 7: 1, and more preferably between 3: 1 and 5: 1.

4 shows a plan view from above of the heating device according to the invention. It can be seen that the temperature sensor 7 , the temperature sensor 17 for the safety valve and the venting pipe 19 for the first flow channel 4 together in an essay or block 20 are arranged.

As mentioned, in the embodiment shown in the figures, the first flow channel 4 through the intermediate spaces between the second flow channel or the tube 6 educated. However, it would also be possible to carry out the two flow channels in the form of a double tube, which around the passage tube 2 is laid or wound. In the embodiment shown in the figures, however, the water to be heated is in direct contact with the passage pipe 2 , causing the temperature transition or the heating of the heat the water is facilitated.

5 shows three views of a passage pipe 2 with the applied thereto second flow channel 6 , One recognizes that by the distance between two spiral 6a of the second flow channel 6 and the diameter of the second flow channel 6 at the same time also the flow cross-section of the first flow channel 6 is influenced or determined. At the in 5 embodiment shown are the inflow 13 and the drain 15 of the second flow channel 6 each on the same side of the passage tube 2 , The pitch circle Tk denotes that circle line on which the respective center points of the second flow channel 6 lie.

The heating water is coupled down and moves along the arrows P2, also spirally, upwards. As in the right part of 5 can be seen, the distances of the two lowest coil can be varied to facilitate the supply of heating water. More specifically, the distance between the last and the penultimate helix can be reduced to thereby reduce the distance between the last helix and the bottom plate 24 to increase and so facilitate the supply of the water to be heated. The cooling water flows within the second flow passage in the direction of the arrow P3.

6 shows four views of the outer tube 8th with the supply and discharge lines arranged thereon for the cooling water and for the water to be heated. This outer tube has at the upper and lower ends respectively (not shown) openings which the passage tube 2 surround. More specifically, the inner circumference of the outer tube 8th with the bottom plate 24 of the passage pipe 2 be connected liquid-tight. The essay 20 is, as mentioned above, directly fixed to the outer tube 8th arranged and the top 14a lies on a circular segment-shaped section 8a of the outer tube 8th at.

All Features disclosed in the application documents are considered to be essential to the invention as long as they are individually or in combination with respect to State of the art are new.

1

heater

2

threading pipe

4

first flow channel

6

second flow channel

6a

Winding of the second flow channel 6

7

temperature sensor

8th

outer tube

8a

circular segment-shaped section of the outer tube 8th

12

Return flow (heating water)

13

Inflow (cooling water)

14

Intake (Heating water)

14a

conical tip

15

Drain (cooling water)

17

Sensor for safety device

19

vent

20

essay

21

burner

24

baseplate

L

longitudinal direction

P1

flow direction

P2

Move of the heating water

Claims (12)

Heating arrangement for buildings with a passage pipe ( 2 ), for discharging a heated gaseous medium, with a first flow channel ( 4 ) which at least partially around the outer circumference of the passage tube ( 2 ) and is designed for heating a liquid medium, wherein the first flow channel ( 4 ) is at least partially in thermal contact with the passage tube, and wherein a second flow channel ( 6 ) is provided, and the second flow channel a pipe ( 6 ), which at least partially around the outer circumference of the passage tube ( 2 ) is arranged and within which a second liquid medium can flow, wherein the first liquid medium and the second liquid medium are separated from each other, characterized in that, the first flow channel ( 4 ) and the second flow channel ( 6 ) are in thermal contact with each other and a wall portion of the second flow channel ( 6 ) forming tube simultaneously a limiting wall for the first flow channel ( 4 ). Heating arrangement according to claim 1, characterized in that the second flow channel spirally around the outer circumference of the passage tube ( 2 ) runs. Heating arrangement according to claim 1, characterized in that the first flow channel through gaps between individual turns ( 6a ) of the second flow channel ( 6 ) is formed. Heating arrangement according to at least one of the preceding claims, characterized in that the flow cross-section of the second flow channel ( 6 ) is less than the flow cross-section of the first flow channel ( 4 ). Heating arrangement according to at least one of the preceding claims, characterized in that radially outside the flow channels ( 4 . 6 ) an outer tube ( 8th ) is provided. Heating arrangement according to at least one of the preceding claims, characterized gekenn records that a temperature sensor ( 7 ) is provided for determining the temperature of the first liquid medium. Heating arrangement according to at least one of the preceding claims, characterized in that the second flow channel ( 6 ) has a valve. Heating arrangement according to at least one of the preceding claims, characterized in that the second flow channel ( 6 ) is connected to a liquid supply line. Heating arrangement according to at least one of the preceding claims, characterized in that the liquids in the two flow channels ( 4 . 6 ) are guided in opposite directions. Heating arrangement according to at least one of the preceding claims characterized in that the second flow channel permanently with a liquid filled is. Heating system with a heating arrangement after at least one of the preceding claims and a burner. Method for heating rooms, wherein a first liquid in a first flow channel (A) around a passage tube, which is traversed by heated air ( 4 ) is heated and heated by a thermal contact with the passage tube, characterized in that around the passage tube, a second liquid medium in a second flow channel ( 6 ) and this second liquid can be used to cool the first liquid.