Combustion-driven thermoelectric generator integrated with flue gas regenerator

Abstract

The invention discloses a combustion-driven thermoelectric generator integrated with a flue gas regenerator, which comprises a body, a combustion cavity is arranged in the body, a discharge port and a feed port are arranged on the body, a thermoelectric power generation sheet is arranged on the outer wall of the body, and the thermoelectric generator further comprises a regenerator, the heat regenerator is provided with a first gas channel and a second gas channel, the first gas channel and the second gas channel are not communicated, one end of the first gas channel is connected with the discharge port, and one end of the second gas channel is connected with the feed port; flue gas in the body enters the first gas channel from the exhaust port and then is exhausted, air enters the second gas channel and then enters the feeding port, and the flue gas in the first gas channel heats the air in the second gas channel. The generator has the following beneficial effects that heat in discharged flue gas is recycled, the stability of fuel combustion is also improved, and the combustion efficiency of the fuel is improved.

Description

Technical Field

[0001] The present invention relates to the field of thermoelectric power generation appliances, and particularly to a combustion-driven thermoelectric generator integrated with a flue gas recuperator. Background Art

[0002] A combustion-driven thermoelectric generator (the fuel can be gas or liquid) is a commonly used outdoor appliance at present. A thermoelectric generator disclosed in the patent publication document CN210980947U generates thermoelectric power by using the hot air flow formed by fuel combustion. In this thermoelectric generator, the high-temperature flue gas generated by combustion passes through the collector, and then the thermoelectric chips on both sides of the collector generate electricity by using the temperature difference on both sides. After the high-temperature flue gas passes through the collector, part of the heat is transferred to the collector and utilized by the thermoelectric chips, and the high-temperature flue gas is directly discharged after passing through the collector. Since the high-temperature flue gas still has relatively high heat after passing through the collector, the heat utilization efficiency of this thermoelectric generator that directly discharges the high-temperature flue gas after passing through the collector is relatively low. Summary of the Invention

[0003] In view of the above problems, the present invention provides a combustion-driven thermoelectric generator integrated with a flue gas recuperator. By setting up a recuperator, the heat in the flue gas discharged after power generation is reused, and the air entering the burner in the main body is preheated by using the heat in the flue gas, which not only realizes the recovery and reuse of the heat in the discharged flue gas, but also improves the stability during fuel combustion and the combustion efficiency of the fuel.

[0004] The technical solution adopted by the present invention is as follows:

[0005] A combustion-driven thermoelectric generator integrated with a flue gas recuperator includes a main body. A combustion chamber is arranged inside the main body. An exhaust port and a feed port are arranged on the main body. Thermoelectric chips are arranged on the outer wall of the main body. The recuperator is further included. A first gas passage and a second gas passage are formed on the recuperator. The first gas passage and the second gas passage are not connected. One end of the first gas passage is connected to the exhaust port, and one end of the second gas passage is connected to the feed port. The flue gas in the main body enters the first gas passage from the exhaust port and then is discharged. The air enters the second gas passage and then enters the feed port. The flue gas in the first gas passage heats up the air in the second gas passage.

[0006] In this thermoelectric generator, before fresh air enters the combustion chamber in the soil for combustion, it first needs to enter the second gas channel of the regenerator. After passing through the second gas channel, it enters the combustion chamber in the main body for combustion. Since the flue gas generated by combustion in the main body needs to enter the first gas channel of the regenerator before being completely discharged into the environment, a part of the heat of the flue gas in the regenerator will be transferred to the air, causing the air temperature to rise. After the air temperature rises, it is mixed with fuel for combustion. This can improve the stability of fuel combustion and the power generation efficiency of the entire thermoelectric generator. When generating the same amount of electricity, relatively less fuel is consumed.

[0007] In summary, in this thermoelectric generator, by setting up a regenerator, the heat in the flue gas discharged after power generation is reused. The heat in the flue gas is used to preheat the air entering the burner in the main body, which not only realizes the recovery and reuse of the heat in the discharged flue gas, but also improves the stability of fuel combustion and the combustion efficiency of the fuel.

[0008] Optionally, there are multiple first gas channels and multiple second gas channels, and the first gas channels and the second gas channels are arranged in an alternating pattern in the regenerator.

[0009] The alternating arrangement of the first gas channels and the second gas channels in the regenerator can improve the heat exchange efficiency between the flue gas and the air, and can transfer as much heat as possible in the flue gas to the air, which can improve the utilization efficiency of the heat in the flue gas.

[0010] Optionally, it further includes a gas collecting hood, which is arranged on the regenerator and is connected to the second gas channel.

[0011] The function of the gas collecting hood is to converge the gas.

[0012] Optionally, it further includes a mixing pipe, which is arranged at the feed inlet of the main body. One end of the mixing pipe is located in the combustion chamber. A fuel pipe is connected to the mixing pipe, and the mixing pipe is connected to the second gas channel.

[0013] After the air leaving the second gas channel enters the mixing pipe, the fuel enters the mixing pipe through the fuel pipe and is mixed with the air. The air heated by the regenerator is mixed with the fuel and then enters the main body.

[0014] Optionally, it further includes a combustion orifice plate, which is arranged in the main body. A heat collecting rod is arranged in the main body, and the combustion chamber is located between the combustion orifice plate and the heat collecting rod.

[0015] By setting the combustion orifice plate, the fuel and the air burn on the combustion orifice plate, which can ensure complete combustion of the fuel.

[0016] Optionally, it further includes a stepped plate disposed inside the body, and the volume of the combustion chamber increases as it gets closer to the heat collecting rod.

[0017] A stepped plate is disposed inside the body. The presence of the stepped plate makes the combustion chamber in a stepped shape. The volume of the combustion chamber is smaller on the side closer to the combustion orifice plate and larger on the side closer to the heat collecting rod. This stepped combustion chamber structure can ensure the high efficiency of the combustion process, and the noise during the combustion process is relatively small. At the same time, this form of combustion chamber can adapt to the combustion of different forms of fuels such as liquids and gases, thus achieving wide-range combustion.

[0018] Optionally, it further includes an electric igniter disposed on the body.

[0019] Optionally, an observation hole is provided on the body, and a quartz glass plate is disposed on the observation hole.

[0020] An observation hole is provided, and a quartz glass plate is disposed on the observation hole. This is to facilitate observing the state of the flame in the combustion chamber through the quartz glass plate.

[0021] Optionally, it further includes a water cooling plate disposed on one side of the thermoelectric generator.

[0022] The function of the water cooling plate is to form a temperature difference on both sides of the thermoelectric generator.

[0023] Optionally, it further includes a plurality of clamping plates. The clamping plates are cooperated together through connecting rods. The body is located between the clamping plates, and the thermoelectric generator and the water cooling plate are located between the clamping plates and the body.

[0024] The beneficial effects of the present invention are as follows: By providing a regenerator, the heat in the flue gas discharged after power generation is reused by the regenerator, and the air entering the burner in the body is preheated by the heat in the flue gas. This not only realizes the recovery and reuse of the heat in the discharged flue gas, but also improves the stability of fuel combustion and the combustion efficiency of the fuel. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0026] Figure 1 It is a schematic structural diagram of a combustion-driven thermoelectric generator integrated with a flue gas regenerator;

[0027] Figure 2 It is a schematic diagram of the positional relationship of the thermoelectric generator on the body;

[0028] Figure 3 It is a schematic diagram of the positional relationship of the combustion orifice plate on the main body;

[0029] Figure 4 It is a schematic diagram of the cooperation relationship between the gas collecting hood and the regenerator.

[0030] The reference numerals in the figure are as follows: 1, regenerator; 101, first gas channel; 102, second gas channel; 2, gas collecting hood; 3, main body; 301, feed pipe; 302, discharge port; 303, combustion chamber; 4, connecting rod; 5, conduit; 6, thermoelectric generator; 7, water-cooled plate; 8, clamping plate; 9, electric igniter; 10, mixing pipe; 1001, gas outlet; 11, fuel pipe; 12, quartz glass plate; 13, heat collecting rod; 14, combustion orifice plate; 15, step plate. Specific embodiments

[0031] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0032] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0033] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. For the sake of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationship. Technologies, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0034] As shown in the attached Figure 1 、attached Figure 2 、attached Figure 3 and attached Figure 4As shown in the figure, a combustion-driven thermoelectric generator integrated with a flue gas recuperator 1 includes a main body 3. A combustion chamber 303 is provided inside the main body 3. An exhaust port 302 and a feed port are provided on the main body 3. Thermoelectric films 6 are provided on the outer wall of the main body 3. It further includes a recuperator 1. A first gas channel 101 and a second gas channel 102 are formed on the recuperator 1. The first gas channel 101 and the second gas channel 102 are in a non-connected state. One end of the first gas channel 101 is connected to the exhaust port 302, and one end of the second gas channel 102 is connected to the feed port. The flue gas inside the main body 3 enters the first gas channel 101 from the exhaust port 302 and then is discharged. After the air enters the second gas channel 102, it enters the feed port. The flue gas in the first gas channel 101 heats up the air in the second gas channel 102.

[0035] In this kind of thermoelectric generator, before the fresh air enters the combustion chamber 303 inside the main body for combustion, it first needs to enter the second gas channel 102 of the recuperator 1. After passing through the second gas channel 102, it enters the combustion chamber 303 inside the main body 3 for combustion. Since the flue gas generated by the combustion inside the main body 3 needs to enter the first gas channel 101 of the recuperator 1 before being completely discharged into the environment, part of the heat of the flue gas in the recuperator 1 will be transferred to the air, causing the air temperature to rise. After the air temperature rises, it is mixed with the fuel for combustion. This can improve the stability of the fuel during combustion and the power generation efficiency of the entire thermoelectric generator. When generating the same amount of electricity, relatively less fuel is consumed.

[0036] In summary, in this kind of thermoelectric generator, by setting the recuperator 1, the heat in the flue gas discharged after power generation is reused by the recuperator 1, and the heat in the flue gas is used to preheat the air entering the main body 3 for combustion. This not only realizes the recovery and reuse of the heat in the discharged flue gas, but also improves the stability of fuel combustion and the combustion efficiency of the fuel.

[0037] In this kind of thermoelectric generator, the recuperator 1 can be made of high thermal conductivity materials, specifically aluminum or copper or silicon carbide or aluminum nitride.

[0038] The fuel used in this kind of thermoelectric generator can be liquid, or gas. Of course, the fuel can also be in the form of powder particles.

[0039] In this kind of thermoelectric generator, since the discharged flue gas can preheat the air entering the main body 3, generally the air temperature is roughly between 0 and 35 °C, and in extreme cases, it may be lower than zero or reach 40 °C. After actual measurement, when the temperature of the flue gas leaving the main body 3 is roughly around 300 °C, the air at about 25 °C can be heated to about 110 °C. The air at this temperature can heat part of the liquid fuel into gas.

[0040] For details, refer to the appendix Figure 1 and the appendix Figure 3 As shown in the appendix, the body 3 is formed by splicing two metal plates with the same shape and size

[0041] As shown in the appendix Figure 1 、the appendix Figure 2 、the appendix Figure 3 and the appendix Figure 4 As shown in the appendix, there are multiple first gas channels 101 and multiple second gas channels 102, and the first gas channels 101 and the second gas channels 102 are arranged alternately in the regenerator 1

[0042] The alternating arrangement of the first gas channels 101 and the second gas channels 102 in the regenerator 1 can improve the heat exchange efficiency between the flue gas and the air, and can transfer the heat in the flue gas to the air as much as possible, thereby improving the utilization efficiency of the heat in the flue gas

[0043] Specifically, in this type of thermoelectric generator, the first gas channels 101 and the second gas channels 102 are in a parallel state, and both the first gas channels 101 and the second gas channels 102 are in the shape of square plate holes

[0044] As shown in the appendix Figure 1 、the appendix Figure 2 、the appendix Figure 3 and the appendix Figure 4 As shown in the appendix, it further includes a gas collecting hood 2, the gas collecting hood 2 is arranged on the regenerator 1, and the gas collecting hood 2 is communicated with the second gas channel 102

[0045] The function of the gas collecting hood 2 is to converge the gas. For details, refer to the appendix Figure 1 and the appendix Figure 4 As shown in the appendix, a conduit 5 is connected to the gas collecting hood 2, and through the conduit 5, it can be connected to other pipes

[0046] In this type of generator, gas collecting hoods 2 are arranged at both ends of the regenerator 1. In this way, during use, one of the gas collecting hoods 2 can be connected to the air blower equipment, and the other gas collecting hood 2 is connected to the mixing pipe 10 through a pipe. In this way, the air blower equipment blows fresh air into the second gas channel 102, and then after mixing in the gas collecting hood 2, it leaves and enters the mixing pipe 10

[0047] As shown in the appendix Figure 1 、the appendix Figure 2 、the appendix Figure 3 and the appendix Figure 4 As shown in the appendix, it further includes a mixing pipe, the mixing pipe is arranged at the feed port of the body 3, one end of the mixing pipe is located in the combustion chamber 303, a fuel pipe 11 is connected to the mixing pipe, and the mixing pipe is connected to the second gas channel 102

[0048] Specifically, in combination with the appendix Figure 3As shown in the figure, the air outlet 1001 of the mixing pipe 10 is roughly located in the middle of the mixing pipe 10. The air outlet 1001 of the mixing pipe 10 faces the bottom of the main body 3. When the air mixed with fuel (which may be gas or liquid) is ejected from the air outlet 1001, it sprays towards the bottom of the main body 3 and flows towards the combustion orifice plate 14 under the recoil effect at the bottom of the main body 3.

[0049] After the air leaving the second gas passage 102 enters the mixing pipe, the fuel enters the mixing pipe through the fuel pipe 11 and mixes with the air. After the air heated by the regenerator 1 is mixed with the fuel, it enters the main body 3.

[0050] As shown in the attached Figure 1 attachment Figure 2 attachment Figure 3 and attachment Figure 4 As shown in the figure, it further includes a combustion orifice plate 14. The combustion orifice plate 14 is arranged in the main body 3. A heat collecting rod 13 is arranged in the main body 3. The combustion chamber 303 is located between the combustion orifice plate 14 and the heat collecting rod 13.

[0051] By arranging the combustion orifice plate 14, the fuel and air burn on the combustion orifice plate 14, which can ensure the full combustion of the fuel.

[0052] Specifically, in this thermoelectric generator, the heat collecting rod 13 can be cylindrical, square, oval, or triangular.

[0053] In this thermoelectric generator, the heat collecting rod 13 and the main body 3 are integrally formed.

[0054] As shown in the attached Figure 1 attachment Figure 2 attachment Figure 3 and attachment Figure 4 As shown in the figure, it further includes a stepped plate 15. The stepped plate 15 is arranged in the main body 3, and the volume of the combustion chamber 303 is larger the closer it is to the heat collecting rod 13.

[0055] By arranging the stepped plate 15 in the main body 3, the stepped plate 15 makes the combustion chamber 303 in a stepped shape. The volume of the combustion chamber 303 is smaller on the side closer to the combustion orifice plate 14 and larger on the side closer to the heat collecting rod 13. This stepped combustion chamber 303 structure can ensure the high efficiency of the combustion process, and the noise during the combustion process is relatively small. At the same time, this form of combustion chamber 303 can adapt to the combustion of different forms of fuels such as liquids and gases, thus realizing wide-range combustion.

[0056] As shown in the attached Figure 1 attachment Figure 2 attachment Figure 3 and attachment Figure 4 As shown in the figure, it further includes an electric igniter 9. The electric igniter 9 is arranged on the main body 3.

[0057] As shown in Figure 1 , Figure 2 , Figure 3 and Figure 4 shown in, an observation hole is provided on the body 3, and a quartz glass plate 12 is provided on the observation hole.

[0058] An observation hole is provided, and a quartz glass plate 12 is provided on the observation hole, so as to facilitate observing the state of the flame in the combustion chamber 303 through the quartz glass plate 12.

[0059] As shown in Figure 1 , Figure 2 , Figure 3 and Figure 4 shown in, it further includes a water-cooling plate 7, and the water-cooling plate 7 is arranged on one side of the thermoelectric power generation sheet 6.

[0060] The function of the water-cooling plate 7 is to be able to form a temperature difference on both sides of the thermoelectric power generation sheet 6.

[0061] As shown in Figure 1 , Figure 2 , Figure 3 and Figure 4 shown in, it further includes clamping plates 8. There are multiple clamping plates 8, and the clamping plates 8 are cooperated together through a connecting rod 4. The body 3 is located between the clamping plates 8, and the thermoelectric power generation sheet 6 and the water-cooling plate 7 are located between the clamping plates 8 and the body 3.

[0062] The above-described embodiments only represent some embodiments of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A combustion-driven thermoelectric generator integrated with a flue gas recuperator, comprising a main body, wherein a combustion chamber is arranged inside the main body, an exhaust port and a feed port are arranged on the main body, and thermoelectric chips are arranged on the outer wall of the main body, characterized in that, It further includes a regenerator, on which a first gas channel and a second gas channel are formed. The first gas channel and the second gas channel are in a non-connected state. One end of the first gas channel is connected to the discharge port, and one end of the second gas channel is connected to the feed port. The flue gas in the body enters the first gas channel from the discharge port and then is discharged. The air enters the second gas channel and then enters the feed port. The flue gas in the first gas channel heats up the air in the second gas channel.

2. The combustion-driven thermoelectric generator integrated with a flue gas recuperator according to claim 1, characterized in that, There are multiple first gas channels and multiple second gas channels, and the first gas channels and the second gas channels are arranged staggered in the regenerator.

3. The combustion-driven thermoelectric generator integrated with a flue gas recuperator according to claim 2, wherein, It further includes a gas collecting hood, which is arranged on the regenerator and is communicated with the second gas channel.

4. An integrated flue gas recuperator combustion-driven thermoelectric generator according to claim 1, characterized in that, It further includes a mixing pipe, which is arranged at the feed port of the body. One end of the mixing pipe is located in the combustion chamber. A fuel pipe is connected to the mixing pipe, and the mixing pipe is connected to the second gas channel.

5. The combustion-driven thermoelectric generator integrated with a flue gas recuperator according to claim 1, characterized in that It further includes a combustion orifice plate, which is arranged in the body. A heat collecting rod is arranged in the body, and the combustion chamber is located between the combustion orifice plate and the heat collecting rod.

6. The combustion-driven thermoelectric generator integrated with a flue gas recuperator according to claim 5, characterized in that, It further includes a stepped plate, which is arranged in the body, and the volume of the combustion chamber is larger closer to the heat collecting rod.

7. The combustion-driven thermoelectric generator integrated with a flue gas recuperator according to claim 1, characterized in that It further includes an electric igniter, which is arranged on the body.

8. The combustion-driven thermoelectric generator integrated with a flue gas recuperator according to claim 1, characterized in that, An observation hole is formed on the body, and a quartz glass plate is arranged on the observation hole.

9. The combustion-driven thermoelectric generator integrated with a flue gas recuperator according to claim 1, characterized in that, It further includes a water-cooled plate, which is arranged on one side of the thermoelectric power generation chip.

10. A combustion-driven thermoelectric generator integrated with a flue gas recuperator according to claim 9, characterized in that, It further includes clamping plates. There are multiple clamping plates, which are cooperated together through connecting rods. The body is located between the clamping plates, and the thermoelectric power generation chip and the water-cooled plate are located between the clamping plates and the body.

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