Device for converting engine exhaust heat energy into electric energy

Abstract

The utility model discloses a device for converting engine exhaust heat energy into electric energy, which belongs to the field of automobile exhaust heat recovery, and comprises an upper shell, a lower shell, pistons, piston rods, a crankshaft and a generator, a plurality of piston cavities are arranged in the upper shell, the number of the piston cavities, the number of the pistons and the number of the piston rods are the same, and the pistons are slidably connected in the piston cavities. The lower shell is installed at the bottom end of the upper shell, a crankshaft rotating cavity is defined by the upper shell and the lower shell, and the two ends of the crankshaft are rotationally connected between the upper shell and the lower shell; the top ends of the piston rods are hinged to the bottom ends of the pistons, and the bottom ends of the piston rods are rotationally connected with the crankshaft. One end of the crankshaft is connected with the generator input end; the top end of the piston cavity makes contact with the outer wall of an engine exhaust pipe and is used for transferring heat of tail gas into the piston cavity. Helium in the piston cavity absorbs heat in tail gas to push the piston to enable the crankshaft to rotate, then the generator generates electricity, the heat in the tail gas is recycled, and the heat efficiency of the engine is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of automobile exhaust heat recovery, especially utilize the device of engine exhaust heat energy conversion electric energy. BACKGROUND

[0002] The effective thermal efficiency of piston to crankshaft work is not more than 51% in the running process of internal combustion engine, no matter gasoline, diesel, natural gas, hydrogen, methane and other fuels, internal combustion engine cannot improve the thermal efficiency to 55%, the remaining heat after fuel combustion is discharged by exhaust device and guided to atmosphere, half of fuel heat value is wasted. It is urgent to provide a device for recycling the exhaust gas discharged by internal combustion engine to improve the thermal efficiency of internal combustion engine. CONTENT OF UTILITY MODEL

[0003] Therefore, the utility model provides a device for utilizing engine exhaust heat energy to convert electric energy to solve the above problems.

[0004] In order to realize the above purpose, the utility model adopts the following technical scheme:

[0005] A device for utilizing engine exhaust heat energy to convert electric energy, comprising: upper shell, lower shell, piston, piston rod, crankshaft and generator, a plurality of piston cavities are arranged in the upper shell, the number of the piston cavities, the piston and the piston rod is same, the piston is slidably connected in the piston cavity, the lower shell is installed at the bottom end of the upper shell, the upper shell and the lower shell enclose the crankshaft rotation cavity, the crankshaft is located in the crankshaft rotation cavity, and both ends are rotatably connected between the upper shell and the lower shell;The top end of the piston rod is hingedly connected with the bottom end of the piston, and the bottom end of the plurality of piston rods is rotatably connected with the crankshaft;One end of the crankshaft is fixedly connected with the input end of the generator;The top end of the piston cavity is in contact with the outer wall of the engine exhaust pipe, for transmitting the heat of the exhaust gas into the piston cavity.

[0006] Further, it further includes a plurality of heat conductors, a plurality of heat conductors are sleeved on the exhaust pipe of the engine, and the bottom ends of the plurality of heat conductors respectively extend into the plurality of piston cavities.

[0007] Further, it further includes an exhaust communication pipe, the output end of the exhaust communication pipe is provided with a plurality of branch pipes, the air inlet end of the exhaust communication pipe is communicated with the exhaust pipe of the engine, a plurality of heat conductors are respectively sleeved on a plurality of branch pipes, and the bottom ends of the plurality of heat conductors respectively extend into a plurality of piston cavities.

[0008] Further, the gas pressure balance tank is further included, the upper part of each of the piston cavities is provided with a gas outlet, the lower part is provided with a gas inlet, the gas pressure balance tank is provided with a gas outlet pipe and a gas inlet pipe, the gas outlet of each of the piston cavities is communicated with the gas outlet pipe, and the gas inlet of each of the piston cavities is communicated with the gas inlet pipe.

[0009] Further, the gas stored in the gas pressure balance tank is helium.

[0010] Further, a plurality of first one-way valves and a plurality of second one-way valves are further included, the first one-way valves are arranged on the communication pipeline of the gas outlet and the gas outlet pipe, and the second one-way valves are arranged on the communication pipeline of the gas inlet and the gas inlet pipe.

[0011] The utility model discloses the beneficial effect lies in:

[0012] The exhaust communication pipe is connected with the exhaust pipe of the engine, the exhaust communication pipe is provided with a plurality of output ends, the heat-conducting body is arranged on the output end of each exhaust communication pipe, the heat-conducting body is inserted into the piston cavity, the efficiency of recycling the heat in the exhaust gas is improved, the helium heat absorption can expand rapidly to push the plurality of pistons to work, and then the helium pushes the crankshaft to rotate, thereby providing power for the generator, when the helium pushes the piston to the lowest end, the gas pressure in the piston cavity becomes small, when the piston is pushed to the highest point under the action of the crankshaft, the helium compression leads to the gas pressure in the piston cavity becoming large, thereby leading to the instability of the whole device, through the gas pressure balance tank and the gas outlet pipe and the gas inlet pipe thereon, the stable pressure in the piston cavity is realized, when the piston moves to the lowest point, the helium is supplemented into the piston cavity through the gas inlet and the second one-way valve, when the piston moves to the highest point, the helium is reduced from the piston cavity through the gas outlet and the first one-way valve, the stability of the gas pressure in the piston cavity and the stability of the device are realized. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only the embodiments of the utility model, and for the ordinary skilled in the art, other drawings can be obtained according to the provided drawings without paying the creative labor.

[0014] Figure 1 It is a top view of a kind of device for converting electric energy using engine exhaust heat energy.

[0015] Figure 2 It is Figure 1 A-A sectional view in it.

[0016] Figure 3 It is Figure 2 B-B sectional view in it.

[0017] Figure 4 for Figure 2 C-C cross-sectional view in

[0018] wherein, in the figure:

[0019] 10 - upper housing, 11 - piston cavity, 12 - gas outlet, 13 - gas inlet, 20 - lower housing, 30 - piston, 40 - piston rod, 50 - crankshaft, 60 - generator, 70 - crankshaft rotation cavity, 80 - heat conductor, 90 - exhaust communication pipe, 91 - branch pipe, 100 - gas pressure balance tank, 101 - gas outlet pipe, 102 - gas inlet pipe, 110 - first one-way valve, 120 - second one-way valve, 130 - engine, 131 - exhaust pipe. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0021] Embodiment 1

[0022] The utility model provides a kind of device for converting electric energy using engine exhaust heat energy, comprising: upper housing 10, lower housing 20, piston 30, piston rod 40, crankshaft 50 and generator 60, a plurality of piston cavities 11 are provided in upper housing 10, the number of piston cavity 11, piston 30 and piston rod 40 is same, piston 30 is slidably connected in piston cavity 11, lower housing 20 is installed at the bottom end of upper housing 10, upper housing 10 and lower housing 20 are enclosed into crankshaft rotation cavity 70, crankshaft 50 is located in crankshaft rotation cavity 70, and both ends are rotatably connected between upper housing 10 and lower housing 20;Piston rod 40 top end and the bottom end of piston 30 are hinged, and the bottom end of a plurality of piston rods 40 is rotatably connected with crankshaft 50;One end of crankshaft 50 is fixedly connected with the input end of generator 60.The top end of piston cavity 11 is in contact with the outer wall of exhaust pipe 131 of engine 130, for transmitting the heat of tail gas into piston cavity 11, Figure 1 Engine 130 in only shows in the figure, and only a few engine pistons are shown in the top view. When using, the top end of piston cavity 11 is in contact with the exhaust pipe 131 of engine 130, absorbs the heat in tail gas, and the gas is heated and expanded in piston cavity 11 to drive piston 30 to work in piston cavity 11, which continuously drives crankshaft 50 to rotate through the transmission of a plurality of piston rods 40, and crankshaft 50 provides power for generator 60. The utility model can absorb the heat in tail gas to generate electricity and realize energy recycling.

[0023] Example 2

[0024] Based on Embodiment 1, a device for converting engine exhaust heat energy into electrical energy further includes a heat conductor 80. The exhaust pipe 131 of the engine 130 passes through multiple heat conductors 80 in sequence. The multiple heat conductors 80 are fixedly sleeved on the exhaust pipe 131 of the engine 130. The bottom ends of the multiple heat conductors 80 extend into multiple piston chambers 11 respectively. The fact that the heat conductors 80 are sleeved on the exhaust pipe 131 and their bottom ends extend into the piston chambers 11 can improve the energy recovery efficiency of exhaust gas.

[0025] Example 3

[0026] See attached document Figures 1-4 As shown, based on Embodiment 2, a device for converting engine exhaust heat energy into electrical energy further includes an exhaust connecting pipe 90. In this case, the exhaust pipe 131 of the engine 130 no longer passes through multiple heat conductors 80 sequentially. The output end of the exhaust connecting pipe 90 is provided with multiple branch pipes 91. The intake end of the exhaust connecting pipe 90 is connected to the exhaust pipe 131 of the engine 130. Multiple heat conductors 80 are respectively sleeved on multiple branch pipes 91, and the bottom ends of multiple heat conductors 80 extend into multiple piston chambers 11. The exhaust connecting pipe 90 is provided with multiple branch pipes 91, and multiple heat conductors 80 are sleeved on multiple branch pipes 91, which can increase the contact area between the heat conductors 80 and the exhaust gas, and improve the heat recovery efficiency in the exhaust gas.

[0027] In a preferred embodiment, a device for converting engine exhaust heat energy into electrical energy further includes a pressure balance tank 100. Each piston chamber 11 has an outlet 12 at its upper part and an inlet 13 at its lower part. The pressure balance tank 100 is equipped with an outlet pipe 101 and an inlet pipe 102. The outlet 12 of each piston chamber 11 is connected to the outlet pipe 101, and the inlet 13 of each piston chamber 11 is connected to the inlet pipe 102. When helium pushes the piston 30 to its lowest point, the pressure inside the piston chamber 11 decreases. When the piston 30 is pushed to its highest point by the crankshaft 50, the helium compression causes the pressure inside the piston chamber 11 to increase, leading to instability in the operation of the entire device. The pressure balance tank 100 and its outlet pipe 101 and inlet pipe 102 stabilize the pressure inside the piston chamber 11.

[0028] In a preferred embodiment, the gas stored in the pressure balance tank 100 is helium. Helium can expand rapidly when heated, thereby improving the efficiency of pushing the piston 30 to do work.

[0029] Preferably, one embodiment, a device for converting engine exhaust heat energy into electrical energy also includes a plurality of first one-way valves 110 and a plurality of second one-way valves 120, the first one-way valves 110 are arranged on the communication pipeline between the gas outlet 12 and the gas outlet pipe 101, and the second one-way valves 120 are arranged on the communication pipeline between the gas inlet 13 and the gas inlet pipe 102, the first one-way valves 110 and the second one-way valves 120 can make the helium flow in only one direction, which improves the effect of pressure stabilization.

[0030] Working principle: the gas inlet end of the exhaust communication pipe 90 is communicated with the exhaust pipe 131 of the engine 130, a plurality of heat conductors 80 are sleeved on a plurality of branch pipes 91, the heat conductor 80 absorbs the heat of the exhaust gas in the branch pipe 91 and quickly transfers to the piston cavity 11, the helium expands quickly after being heated and pushes the piston 30 to work, through the transmission of a plurality of piston rods 40, the crankshaft 50 is continuously driven to rotate, and the crankshaft 50 provides power for the generator 60 to generate electricity, so that the heat in the exhaust gas is recycled and utilized, and the thermal efficiency of the engine 130 is improved. In the specific process, when the piston 30 moves downward in the piston cavity 11, the helium pushes the piston 30 to move downward, the volume of the piston cavity 11 above the piston 30 becomes larger, and the pressure decreases, when the piston 30 moves downward and passes through the gas inlet 13, the helium in the gas pressure balance tank 100 enters the piston cavity 11 above the piston 30 through the gas inlet pipe 102, the second one-way valve 120 and the gas inlet 13 to increase the pressure; when the piston 30 moves upward in the piston cavity 11 under the pushing action of the piston rod 40, the helium is continuously compressed, and the helium enters the gas pressure balance tank 100 through the gas outlet 12, the first one-way valve 110 and the gas outlet pipe 101 to release pressure; the pistons 30 in a plurality of piston cavities 11 continuously move upward or downward, and the gas pressure balance tank 100, the gas inlet pipe 102, the second one-way valve 120, the gas inlet 13, the gas outlet 12, the first one-way valve 110 and the gas outlet pipe 101 are used for pressure stabilization.

[0031] The above is only a specific embodiment of the utility model, and the specific structure and characteristics of the scheme are not described in detail. It should be pointed out that for those skilled in the art, without departing from the structure of the utility model, a number of deformations and improvements can be made, which should also be considered as the protection range of the utility model, and these will not affect the effect and practicality of the utility model. The protection scope claimed in the present application should be subject to the content of its claims, and the specific implementation mode and the like in the specification can be used to explain the content of the claims.

[0032] The various embodiments described in this specification are presented by way of example, and each embodiment is presented for the purpose of conveying the novelty and inventive aspects of the present patent application. For the embodiments disclosed, because they correspond to the methods disclosed in the embodiments, they are described more simply, and the relevant parts are referred to the method part description.

[0033] The above description of disclosed embodiments enables one of ordinary skill in the art to make and use the patent application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the patent application. Thus, the present patent application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for converting electrical energy using heat energy of engine exhaust gas, characterized in that, It comprises: An upper shell (10), a lower shell (20), a piston (30), a piston rod (40), a crankshaft (50) and a generator (60), a plurality of piston cavities (11) are arranged in the upper shell (10), the number of the piston cavities (11), the piston (30) and the piston rod (40) is the same, the piston (30) is slidingly connected in the piston cavity (11), the lower shell (20) is installed at the bottom end of the upper shell (10), the upper shell (10) and the lower shell (20) enclose a crankshaft rotating cavity (70), the crankshaft (50) is located in the crankshaft rotating cavity (70), and both ends are rotatably connected between the upper shell (10) and the lower shell (20); the top end of the piston rod (40) is hingedly connected to the bottom end of the piston (30), and the bottom end of the plurality of piston rods (40) is rotatably connected to the crankshaft (50); one end of the crankshaft (50) is fixedly connected to the input end of the generator (60); the top end of the piston cavity (11) is in contact with the outer wall of the exhaust pipe (131) of the engine (130), for transmitting the heat of the exhaust gas into the piston cavity (11).

2. The device for converting thermal energy of exhaust gases of an engine into electric energy according to claim 1, characterized in that, It also comprises a heat conductor (80), a plurality of heat conductors (80) are sleeved on the exhaust pipe (131) of the engine (130), and the bottom ends of the plurality of heat conductors (80) respectively extend into the plurality of piston cavities (11).

3. The device for converting thermal energy of exhaust gases of an engine into electric energy according to claim 2, characterized in that, It also comprises an exhaust communication pipe (90), the output end of the exhaust communication pipe (90) is provided with a plurality of branch pipes (91), the gas inlet end of the exhaust communication pipe (90) is communicated with the exhaust pipe (131) of the engine (130), a plurality of heat conductors (80) are sleeved on a plurality of branch pipes (91), and the bottom ends of the plurality of heat conductors (80) respectively extend into a plurality of piston cavities (11).

4. The device for converting thermal energy of exhaust gases of an engine into electric energy according to claim 1, characterized in that, It also comprises a gas pressure balance tank (100), the upper part of each piston cavity (11) is provided with a gas outlet (12), and the lower part is provided with a gas inlet (13), the gas pressure balance tank (100) is provided with a gas outlet pipe (101) and a gas inlet pipe (102), the gas outlet (12) of each piston cavity (11) is communicated with the gas outlet pipe (101), and the gas inlet (13) of each piston cavity (11) is communicated with the gas inlet pipe (102).

5. The device for converting thermal energy of exhaust gases of an engine into electric energy according to claim 4, characterized in that, The gas stored in the gas pressure balance tank (100) is helium.

6. The device for converting thermal energy of exhaust gases of an engine into electric energy according to claim 4, characterized in that, It also comprises a plurality of first one-way valves (110) and a plurality of second one-way valves (120), the first one-way valve (110) is arranged on the communication pipeline between the gas outlet (12) and the gas outlet pipe (101), and the second one-way valve (120) is arranged on the communication pipeline between the gas inlet (13) and the gas inlet pipe (102).

Images