An adjustable waste heat recovery cooking stove

Abstract

The present invention relates to the technical field of kitchen utensils, and specifically relates to an adjustable waste heat recovery cooking range, which includes: a cooking range housing, a flue gas recovery device, a pressure valve, a flue gas pipe, a heat exchange device, and a thin water pipe. The cooking range housing is in an "L"-shaped frame. Two faucets are arranged on the wall surface of the cooking range housing. Two cooking range cavities are opened at the lower end of the cooking range housing. An adjustment knob is arranged on one side of the cooking range housing. A fire port is arranged at the bottom of the cooking range cavity. The flue gas recovery device includes a smoke exhaust port, an adjustment part, an isolation layer, and a smoke exhaust port main pipe. The heat exchange device of the present invention is a plurality of hollow cavities with spiral channels arranged inside. By using the spiral and reciprocating movement of the flue gas in the heat exchange device, the medium in the thin water pipe is heat-exchanged to the greatest extent, greatly improving the heat exchange efficiency.

Description

Technical Field

[0001] The present invention relates to the field of kitchen utensils, and particularly to an adjustable waste heat recovery cooking range. Background Art

[0002] Currently, gas stoves using natural gas and liquefied petroleum gas have been popularized. During the use of gas stoves, generally, a direct heating method is adopted, making the gas stove flame exposed to the air. The contact between the flame and the air not only causes a large amount of heat loss, but also the combustion flue gas is directly discharged outside through a range hood or an exhaust fan, resulting in the direct loss of the waste heat of the flue gas and being unable to be fully utilized. As a result, the combustion efficiency of gas combustion is low. For this reason, we propose a waste heat recovery device for a cooking range.

[0003] With the further development of technology and productivity, kitchen utensils are gradually becoming energy-saving and intelligent. Of course, the reform and upgrade of stoves are not only reflected in the diversification of energy supply methods. Currently, the reform and upgrade of stoves have various functions, but in the prior art, the energy loss of stoves is as high as 70%, and a large amount of energy is wasted; among them, the direct discharge of flue gas heat will not only have a certain impact on the surrounding environment, to a certain extent, the working environment of chefs is affected by high temperature, and it also causes the loss of stove heat; and some existing waste heat recovery devices cannot achieve automatic adjustment, that is, they cannot be adjusted according to temperature and pressure changes, resulting in too low recovered heat and the energy cannot be fully utilized. Summary of the Invention

[0004] Therefore, the present invention is made in view of the above problems. The present invention can adjust the degree of waste heat recovery through the temperature and pressure inside the cooking range, so as to recover the redundant energy of the cooking range work with the most efficient and environmentally friendly means. The present invention achieves the above object through the following technical solutions.

[0005] An adjustable waste heat recovery cooking range, comprising: a cooking range housing, a flue gas recovery device, a pressure valve, a flue gas pipe, a heat exchange device, and a thin water pipe. The cooking range housing is in an "L"-shaped frame. Two faucets are provided on the wall surface of the cooking range housing. Two cooking range cavities are opened at the lower end of the cooking range housing. An adjustment knob is provided on one side of the cooking range housing. A fire port is provided at the bottom of the cooking range cavity. The flue gas recovery device includes a smoke exhaust port, an adjustment part, an isolation layer, and a smoke exhaust port main pipe. The flue gas recovery device is arranged at the middle position of the cooking range cavity. The upper part of the flue gas recovery device is evenly provided with smoke exhaust ports. Four adjustment parts are evenly nested at the upper end of the flue gas recovery device. The upper end of the adjustment part is provided with a smoke exhaust port. A horizontal through hole is provided inside the adjustment part. Spring shims are provided on both the upper and lower sides of the horizontal through hole and inside the adjustment part. An isolation layer is provided at the bottom of the flue gas recovery device. The inside of the isolation layer is a hollow structure. The smoke exhaust port main pipe is the cavity between the upper and lower ends of the flue gas recovery device. Four pressure valves are evenly nested at the upper part of the flue gas recovery device. The pressure valve is in an arc-shaped structure. Both ends of the pressure valve are provided with arc-shaped valve bodies. The two groups of arc-shaped valve bodies are located directly below the smoke exhaust port. The ends of the two arc-shaped valve bodies correspond to the horizontal through holes. Three adjustment smoke exhaust ports are evenly arranged at the ends of the arc-shaped valve bodies. The outlet of the cooking range cavity is communicated with the flue gas pipe. A heat exchange device is arranged at the middle position of the flue gas pipe. The heat exchange devices are communicated through multiple thin water pipes.

[0006] Preferably, the whole flue gas recovery device is in a ring structure, and the middle part of the flue gas recovery device has an inclined slope.

[0007] Preferably, an outlet is provided on one side of the smoke exhaust port main pipe, and the bottom of each smoke exhaust port is connected to the cavity of the smoke exhaust port main pipe.

[0008] Preferably, the number of horizontal through holes in the adjustment part is two. There is a certain height difference between the two horizontal through holes. The ends of the two arc-shaped valve bodies correspond to the two horizontal through holes. The two arc-shaped valve bodies are telescopically arranged inside the pressure valve through springs.

[0009] Preferably, the distance between two adjacent adjustment smoke exhaust ports is the same as the distance between two adjacent smoke exhaust ports at the upper end. A temperature sensor and a pressure sensor are arranged inside the adjustment part.

[0010] Preferably, there are a total of five tanks in the heat exchange device. A flue gas spiral pipe, a heat exchange medium pipe, and a flue gas outlet pipe are arranged inside the heat exchange device. Both the flue gas spiral pipe support and the heat exchange medium pipe support are in spiral structures, and the flue gas spiral pipe support supports the heat exchange medium pipe support. The flue gas outlet pipe is arranged inside the flue gas spiral pipe and the heat exchange medium pipe support. The top of the flue gas outlet pipe is communicated with the top of the flue gas spiral pipe.

[0011] Beneficial effects:

[0012] 1. In the present invention, a pressure valve is provided in the flue gas recovery device to adjust the flue gas recovery. Using the pressure and temperature in the stove cavity as reference standards, the flue gas is automatically recovered. When the temperature and pressure in the cavity do not reach a certain level, only a certain number of flue gas outlets are opened to slowly discharge the flue gas. The exhaust speed is directly proportional to the rate of flue gas generation. When the flue gas generation speed is faster and the pressure and temperature of the cavity are higher, the pressure valve is pushed to open more flue gas outlets, thereby slowly adjusting the flue gas pressure and temperature in the cavity, solving the problem that the general stove waste heat recovery device cannot be adjusted, resulting in low recovery efficiency or affecting the cooking efficiency.

[0013] 2. The pressure valve of the present invention is automatically adjusted with the temperature in the cavity, so that the amount of flue gas recovered is directly proportional to the temperature and pressure in the cavity. The baffle of the pressure valve is provided with through holes arranged regularly. The relationship between the through holes and the flue gas outlets is that as the pressure and temperature increase, the number of baffle blocks blocking the smoke exhaust ports decreases, so the smoke exhaust flow rate is more. When the pressure and temperature in the cavity decrease, the baffle blocks of the pressure valve will reset to block the flue gas outlets, solving the problem of low waste heat recovery efficiency through dynamic adjustment.

[0014] 3. The heat exchange device of the present invention is a plurality of hollow cavities with spiral channels inside, and is crossed with the heat exchange device through horizontally arranged circulating thin water pipes. Using the spiral and reciprocating movement of the flue gas in the heat exchange device to maximize the heat exchange of the medium in the thin water pipes, and through the hollow structure of the flue gas pipeline and the heat exchange device wall, the heat exchange efficiency is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0016] Figure 2 It is a top view of the present invention.

[0017] Figure 3 It is a schematic diagram of the structure of the flue gas recovery device and the pressure valve of the present invention.

[0018] Figure 4 It is a schematic diagram of the internal structure of the flue gas recovery device and the pressure valve of the present invention.

[0019] Figure 5 It is a schematic diagram of the structure of the pressure valve and the flue gas recovery device of the present invention.

[0020] Figure 6 It is a cross-sectional view of the adjusting part of the present invention;

[0021] Figure 7 It is a schematic diagram of the structure of the flue gas pipeline and the heat exchange device of the present invention.

[0022] Figure 8 This is a schematic structural diagram of the thin water pipe and the heat exchange device of the present invention.

[0023] Figure 9 This is a schematic internal structure diagram of the heat exchange device of the present invention.

[0024] Explanation of reference numerals:

[0025] 1. Stove top housing; 2. Flue gas recovery device; 3. Pressure valve; 4. Flue gas pipe; 5. Heat exchange device; 6. Thin water pipe; 11. Faucet; 12. Stove top cavity; 13. Explosion-proof port; 14. Adjusting knob; 15. Burner port; 21. Smoke exhaust port; 211. Horizontal through hole; 212. Spring retaining piece; 22. Adjusting part; 23. Isolation layer; 24. Smoke exhaust port main pipe; 31. Arc-shaped valve body; 32. Adjustable smoke exhaust port; 51. Flue gas spiral pipe; 52. Heat exchange medium pipe; 53. Flue gas outlet pipe. Detailed implementation manners

[0026] The present invention will be further described below in conjunction with specific embodiments and the accompanying drawings. More details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention is clearly capable of being implemented in many other ways different from this description. Those skilled in the art can make similar extensions and deductions according to the actual application situation without departing from the connotation of the present invention. Therefore, the protection scope of the present invention should not be limited by the content of this specific embodiment.

[0027] As Figures 1-9 shown, an adjustable waste heat recovery stove top device includes: a stove top housing 1, a flue gas recovery device 2, a pressure valve 3, a flue gas pipe 4, a heat exchange device 5, and a thin water pipe 6;

[0028] As Figures 1-2 shown, the stove top housing 1 is the basic fixed frame of this device, and the overall cross-section is in an "L" shape. Two faucets 11 are provided on the "L"-shaped wall surface for adjusting hot and cold water. The stove top cavity 12 is composed of two circular cavities arranged on the plane of the stove top housing 1, and are respectively arranged below the faucets 11. Two explosion-proof ports 13 are provided at the top of each stove top cavity 12 to facilitate the small amount of flue gas discharge and prevent explosion caused by excessive pressure and temperature; Two adjusting knobs 14 are provided at the front end of the stove top housing 1 to facilitate adjusting the mixing ratio of gas and air so as to adjust the firepower; The burner port 15 is provided at the bottom of the stove top cavity 12 for discharging the mixed gas of gas and air to provide a flame, and the multi-through-hole design facilitates the more rapid improvement of the firepower;

[0029] As Figure 3 、 Figure 4As shown, the overall shape of the flue gas recovery device 2 is annular, and it is arranged at the middle position of the stove cavity 12. There is an inclined slope in the middle of the flue gas recovery device 2, which is convenient for the flue gas to impact the bottom of the pot and return to the middle position of the flue gas recovery device 2 for central reflux, so as to circulate and heat the pot body, with higher efficiency; at the upper part of the flue gas recovery device 2, there are evenly arranged exhaust ports 21, which are convenient for the high-temperature flue gas to be discharged from the exhaust ports 21 when it impacts the bottom of the pot and returns; there are four adjusting parts 22 evenly nested at the upper part of the flue gas recovery device 2. The upper part of the adjusting part 22 is provided with an exhaust port 21. There are two horizontal through holes 211 inside. The two horizontal through holes 211 are arranged on both sides of the exhaust port 21 of the adjusting part 22, and there is a certain height difference between the two horizontal through holes 211, which has the same function as the exhaust port 21 of the flue gas recovery device 2. A temperature sensor and a pressure sensor are arranged inside the adjusting part 22, which is convenient for adjusting the resistance when the flue gas recovery device 2 discharges flue gas, so as to adapt to the temperature and pressure in the stove cavity 12; on the upper and lower sides of the horizontal through hole 211 and inside the adjusting part 22, there are spring gaskets 212, which can adjust the resistance in the horizontal through hole 211; the isolation layer 23 is the bottom structure of the flue gas recovery device 2, and its internal structure is hollow, which is convenient for heat insulation of the flue gas and prevents heat from being conducted in other ways, so as to improve the efficiency of flue gas recovery; the exhaust port main pipe 24 is the cavity between the upper and lower ends of the flue gas recovery device 2, and there is a single outlet for exhaust. The upper and lower ends of the flue gas recovery device 2 are of an integral structure, and the bottom of each exhaust port 21 is connected to the exhaust port main pipe 24 and discharged through the outlet of the exhaust port main pipe 24.

[0030] As Figure 3 , Figure 5 , Figure 6As shown, there are a total of four pressure valves 3 nested evenly at the upper part of the flue gas recovery device 2; the body of the pressure valve 3 is arc-shaped, with arc-shaped valve bodies 31 provided at both ends. The two arc-shaped valve bodies 31 are located directly below the smoke exhaust port 21. There is a height difference between the two arc-shaped valve bodies 31. The ends of the two arc-shaped valve bodies 31 correspond to the horizontal through holes 211. Inside the pressure valve 3, there is a spring to support the two arc-shaped valve bodies 31 to extend outwards; among them, two-thirds of the length of the arc-shaped valve body 31 can be compressed into the pressure valve 3 by the pressure of the high-pressure flue gas in the stove cavity 12; at the end of the arc-shaped valve body 31, three regulating smoke exhaust ports 32 are evenly arranged. The spacing between the regulating smoke exhaust ports 32 is the same as the spacing between the upper smoke exhaust ports 21. When the arc-shaped valve body 31 is fully extended, its end is located at the horizontal through hole 211 of the regulating part 22, and a vertical frictional force and pressure are applied through the spring retaining piece 212 of the regulating part 22. When the pressure in the stove cavity 12 is greater than the frictional force on the arc-shaped valve body 31 at the regulating part 22 and the elastic force provided inside the pressure valve 3, this critical point can be adjusted through the spring retaining piece 212 inside the regulating part 22; in the initial state, all the through holes of the smoke exhaust port 21 are blocked by the arc-shaped valve body 31. When the internal pressure of the stove cavity 12 is greater than the critical point, the arc-shaped valve body 31 slowly retracts into the pressure valve 3, and the regulating smoke exhaust ports 32 will coincide with the smoke exhaust port 21, so as to exhaust the high-temperature and high-pressure flue gas in the stove cavity 12; among them, when the internal pressure of the stove cavity 12 further increases and two-thirds of the arc-shaped valve body 31 enters the pressure valve 3, the regulating smoke exhaust port 32 coincides with the most end smoke exhaust port 21. At this time, it is the maximum value for exhausting high-temperature flue gas;

[0031] As Figure 7 shown, both ends of the flue gas pipe 4 are connected to the outlets of the stove cavity 12 through branch pipes, and a heat exchange device 5 is arranged at the middle position of the flue gas pipe 4; As Figure 8 、 Figure 9As shown, the heat exchange device 5 has a total of five tanks, and the tanks are connected internally by multiple layers of thin water pipes 6. The flue gas inside the heat exchange device 5 does not come into direct contact with the water in the thin water pipes 6. Inside the heat exchange device 5, there are a flue gas spiral pipe 51, a heat exchange medium pipe 52, and a flue gas outlet pipe 53. The flue gas enters the flue gas spiral pipe 51 in the heat exchange device 5 from the stove cavity 12 via the flue gas pipeline 4. The flue gas spiral pipe 51 is divided into the outside and the inside of the flue gas outlet pipe 53 by the flue gas outlet pipe 53. The flue gas rises along the flue gas spiral pipe 51 from the outside of the flue gas outlet pipe 53 and heats the heat exchange medium pipe 52 spirally arranged on the flue gas spiral pipe 51. The flue gas spiral pipe 51 has the same structure as the support of the heat exchange medium pipe 52, and the flue gas spiral pipe 51 plays a role in supporting the heat exchange medium pipe 52. A medium can be added to the heat exchange medium pipe 52 to heat other devices. The flue gas rising to the top of the flue gas spiral pipe 51 enters the inside of the flue gas outlet pipe 53 from the top of the flue gas outlet pipe 53 and is discharged downward (the top of the flue gas outlet pipe 53 is communicated with the top of the flue gas spiral pipe 51). Then the flue gas enters the next tank through the bottom pipe of the heat exchange device 5 once for sufficient heat exchange, so that the efficiency reaches the maximum. Finally, the flue gas after heat exchange can be discharged from the leftmost or rightmost tank.

[0032] The working principle of the present invention:

[0033] First, when the stove starts working, the pressure and temperature in the stove cavity 12 gradually increase. During the process of pressure and temperature increase, the flue gas is slowly exhausted only through the explosion-proof port 13 and the normally open adjustment part 22, ensuring that the pressure in the stove cavity 12 rises slowly and steadily. The adjustment part 22 is internally provided with a temperature sensor and a pressure sensor, which are convenient for adjusting the resistance when the flue gas recovery device 2 discharges flue gas, so as to adapt to the temperature and pressure in the stove cavity 12. And it is internally provided with a spring flap 212 to adjust the resistance in the horizontal through hole 211. During the initial operation of the stove, the adjustment flap in the adjustment part 22 completely blocks the arc-shaped valve body 31, and the arc-shaped valve body 31 blocks the smoke exhaust port 21. The two arc-shaped valve bodies 31 have a height difference. The inside of the pressure valve 3 is provided with a spring to support the two arc-shaped valve bodies 31 to extend outwards. If the high-pressure flue gas in the stove cavity 12 can press two-thirds of the arc-shaped valve body 31 into the inside of the pressure valve 3; when the arc-shaped valve body 31 is fully unfolded, the end is located at the horizontal through hole of the adjustment part 22, and a vertical frictional force and pressure are applied through the spring flap 212 of the adjustment part 22. When the pressure in the stove cavity 12 is greater than the frictional force of the adjustment part 22 on the arc-shaped valve body 31 and the elastic force provided inside the pressure valve 3, this critical point can be adjusted through the spring flap 212 inside the adjustment part 22; when the pressure in the stove cavity 12 gradually rises to a certain level (without affecting the temperature in the pot), the arc-shaped valve body 31 will be compressed into the body of the pressure valve 3, and the flue gas enters the flue gas pipeline 4 from the smoke exhaust port main pipe 24, and then enters the heat exchange device 5; the flue gas enters the flue gas spiral pipe 51 in the heat exchange device 5. The flue gas rises along the outside of the flue gas outlet pipe 53 along the flue gas spiral pipe 51, heating the heat exchange medium pipe 52 spirally arranged on the flue gas spiral pipe 51. A medium can be added to the heat exchange medium pipe 52 to heat other devices; the flue gas rising to the top of the flue gas spiral pipe 51 enters the inside of the flue gas outlet pipe 53 from the top of the flue gas outlet pipe 53 and is discharged downward (the top of the flue gas outlet pipe 53 is communicated with the top of the flue gas spiral pipe 51); then the flue gas enters the next tank through the bottom pipe of the heat exchange device 5 for sufficient heat exchange once, so that the efficiency reaches the maximum. Finally, the flue gas after heat exchange can be discharged from the leftmost or rightmost tank.

Claims

1. An adjustable waste heat recovery cooking range, comprising: Stove top housing (1), flue gas recovery device (2), pressure valve (3), flue gas pipe (4), heat exchange device (5); the flue gas recovery device (2) is arranged inside the stove top housing (1); It is characterized in that: the upper end of the flue gas recovery device (2) is evenly provided with exhaust openings (21), and the upper end of the flue gas recovery device (2) is evenly nested with an adjustment part (22); the upper end of the adjustment part (22) is provided with an exhaust opening (21) penetrating through it, and a horizontal through hole (211) is arranged inside the adjustment part (22); the two horizontal through holes (211) are arranged on both sides of the exhaust opening (21) of the adjustment part (22), and a spring retaining piece (212) is arranged inside the adjustment part (22). The cavity between the upper and lower ends of the flue gas recovery device (2) is the main exhaust opening pipe (24); a pressure valve (3) is nested at the upper end of the flue gas recovery device (2). Both ends of the pressure valve (3) are provided with arc-shaped valve bodies (31). The two arc-shaped valve bodies (31) are located below the exhaust opening (21). The end of the arc-shaped valve body (31) corresponds to the horizontal through hole (211), and an adjustable exhaust opening (32) is arranged at the end of the arc-shaped valve body (31); a heat exchange device (5) is arranged on the flue gas pipe (4). The number of the horizontal through holes (211) in the adjustment part (22) is two. The two horizontal through holes (211) have a certain height difference. The ends of the two arc-shaped valve bodies (31) correspond to the two horizontal through holes (211). The two arc-shaped valve bodies (31) are telescopically arranged inside the pressure valve (3) through springs. The distance between adjacent adjustable exhaust openings (32) is the same as the distance between adjacent exhaust openings (21) at the upper end.

2. The adjustable waste heat recovery cooking range according to claim 1, wherein: The whole of the flue gas recovery device (2) is in a ring structure, and the middle part of the flue gas recovery device (2) has an inclined gradient.

3. The adjustable waste heat recovery cooking range according to claim 2, characterized in that: One side of the main exhaust opening pipe (24) is provided with an outlet, and the bottom of each exhaust opening (21) is connected to the cavity of the main exhaust opening pipe (24).

4. The adjustable waste heat recovery cooking stove according to claim 3, characterized in that: A temperature sensor and a pressure sensor are arranged inside the adjustment part (22).

5. The adjustable waste heat recovery cooking range according to claim 4, wherein: The number of the heat exchange devices (5) is multiple, and the multiple heat exchange devices (5) are communicated through thin water pipes (6); a flue gas spiral pipe (51), a heat exchange medium pipe (52), and a flue gas outlet pipe (53) are arranged inside the heat exchange device (5).

6. The adjustable waste heat recovery cooking range according to claim 5, wherein: Both the flue gas spiral pipe (51) and the heat exchange medium pipe (52) are in spiral structures, and the flue gas spiral pipe (51) supports the heat exchange medium pipe (52). The flue gas outlet pipe (53) is arranged inside the flue gas spiral pipe (51) and the heat exchange medium pipe (52), and the top of the flue gas outlet pipe (53) is communicated with the top of the flue gas spiral pipe (51).

7. An adjustable waste heat recovery cooking range according to claim 6, characterized in that: An isolation layer (23) is arranged at the bottom of the flue gas recovery device (2), and the inside of the isolation layer (23) is a hollow structure.

8. The adjustable waste heat recovery cooking range according to claim 7, wherein: A faucet (11) is arranged on the wall surface of the stove top housing (1), and two stove cavities (12) are opened at the lower end. A fire port (15) is arranged at the bottom of the stove cavity (12), and the flue gas recovery device (2) is arranged at the middle position of the stove cavity (12).

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