Heat exchanger based on utilization of residual gas of steamer

Abstract

The invention discloses a heat exchanger based on steamer residual gas utilization, which comprises four supporting legs, the upper parts of the four supporting legs are fixedly connected with a shell, an upper end cover is arranged above the shell, a first partition plate is arranged at the lower end in the shell, a plurality of heat exchange pipes arranged in a matrix are arranged above the first partition plate, and a plurality of heat exchange pipes are arranged above the first partition plate. Each heat exchange pipe is provided with four arc-shaped grooves arranged in a matrix mode, the upper ends of the heat exchange pipes located in the same vertical plane communicate with a T-shaped connecting pipe, a plurality of heat exchange fins arranged in a staggered mode are arranged between the T-shaped connecting pipe and the first partition plate, and the upper end of the T-shaped connecting pipe penetrates through the shell to communicate with a pressure relief assembly. The heat exchanger is simple in structure and good in heat exchange effect, the residence time of boiler residual gas in the heat exchange pipes is prolonged, and the utilization rate of heat energy in the residual gas is effectively increased.

Description

Technical Field

[0001] This invention relates to the field of steamer technology, and in particular to a heat exchanger based on the utilization of residual gas from a steamer. Background Technology

[0002] An electric steamer, also known as an electric steamer basket, is a kitchen appliance developed from traditional wooden, aluminum, and bamboo steamers. It uses electric heating steam to directly steam various foods. The electric steamer adopts a stacked food rack design, which can process multiple layers of food at the same time, saving space and time. When the steamer is working, the heat generated during operation can be recovered and reused through a heat exchange device. Existing heat exchange devices have a simple structure, and when exchanging heat with the residual gas in the steamer, the residual gas has a limited residence time inside the heat exchange device, resulting in poor heat exchange effect between the residual gas and the heat exchange device, and limited utilization of the heat energy in the residual gas. Therefore, we propose a heat exchanger based on the utilization of residual gas in the steamer. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides a heat exchanger based on the utilization of waste gas from a steamer. This invention solves the problem that existing heat exchange devices have simple structures, and when exchanging heat with waste gas from a steamer, the waste gas has a limited residence time inside the heat exchange device, resulting in poor heat exchange efficiency and limited utilization of the thermal energy in the waste gas.

[0004] This invention discloses a heat exchanger based on the utilization of waste gas from a steamer, comprising four support legs, all of which are fixedly connected to a housing. The housing has an upper cover, and a first partition is located at the lower end of the housing. Above the first partition are multiple heat exchange tubes arranged in a matrix, each heat exchange tube having four arc-shaped grooves arranged in a matrix. The upper ends of the heat exchange tubes, located in the same vertical plane, are connected to T-shaped connecting pipes. Multiple staggered heat exchange fins are located between the T-shaped connecting pipes and the first partition. The upper end of the T-shaped connecting pipes penetrates the housing and is connected to a pressure relief assembly. Below the first partition, the housing has a second partition with multiple drainage holes arranged in a matrix. Above the second partition, the housing has an air inlet pipe, and on one side of the upper end of the housing is a water outlet pipe. Near the water outlet pipe, above the first partition, the housing also has a water inlet pipe.

[0005] In the above scheme, the pressure relief assembly includes a first flange, which is fixedly connected to a T-shaped connecting pipe. A first air guide pipe is provided above the first flange. A first fixed plate is provided at the lower end of the first air guide pipe. A first movable rod is inserted into the middle of the first fixed plate. Four first vent holes are arranged in a matrix on the outside of the first movable rod on the first fixed plate. The first movable rod is fixedly connected to a cover plate above. A first sealing block is provided in the middle of the lower part of the cover plate. A first spring is sleeved between the first fixed plate and the first sealing block on the first movable rod.

[0006] In the above scheme, the pressure relief assembly includes a second flange, which is fixedly connected to a T-shaped connecting pipe. A second air guide pipe is provided above the second flange. A second fixed plate is provided at the upper end of the second air guide pipe. A second movable rod is inserted into the middle of the second fixed plate. Four matrix-arranged second air guide holes are opened on the second fixed plate outside the second movable rod. The lower part of the second movable rod is fixedly connected to a connecting block. A second spring is sleeved between the second fixed plate and the connecting block on the second movable rod. A second sealing block is provided below the connecting block. A limiting block is provided at the lower end of the second air guide pipe. A limiting groove matching the second sealing block is opened in the middle of the limiting block.

[0007] In the above scheme, a motor is provided in the lower middle part of the housing. The rotating shaft of the motor passes through the housing and is fixedly connected to the connecting rod. The upper part of the connecting rod passes through the second partition and is fixedly connected to the turntable. Multiple fan blades are arranged in a matrix above the turntable.

[0008] In the above scheme, a drain pipe is provided at the lower end of the shell, and a valve is provided on the drain pipe.

[0009] In the above scheme, the shell and the upper cover are fixedly connected by a skirt.

[0010] In the above scheme, an air outlet pipe is provided in the middle of the upper part of the upper cover.

[0011] The advantages and beneficial effects of this invention are as follows: This invention provides a heat exchanger based on the utilization of waste gas from a steam boiler. After the airflow is conducted through the heat exchange tube, it accumulates inside the T-shaped connecting pipe. The pressure relief component can seal the T-shaped connecting pipe, allowing the waste gas from the steam boiler to stay inside the heat exchange tube for a longer time. After the gas expands inside the T-shaped connecting pipe, the pressure relief component can depressurize the T-shaped connecting pipe, allowing the waste gas to flow again inside the heat exchange tube and the T-shaped connecting pipe. The arc-shaped groove reduces the internal cross-sectional size of the heat exchange tube while increasing the contact area between the heat exchange tube and the water flow inside the shell. This type of heat exchanger has a simple structure, good heat exchange effect, and prolongs the residence time of the boiler waste gas inside the heat exchange tube, effectively improving the thermal energy utilization rate of the waste gas. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of the present invention;

[0014] Figure 2 This is a cross-sectional view of the present invention;

[0015] Figure 3 This is a schematic diagram of the heat exchange tube structure of the present invention;

[0016] Figure 4 This is a schematic diagram of the first pressure relief component of the present invention;

[0017] Figure 5 This is a cross-sectional view of the first pressure relief component of the present invention;

[0018] Figure 6 This is a schematic diagram of the second pressure relief assembly of the present invention;

[0019] Figure 7 This is a cross-sectional view of the second pressure relief component of the present invention.

[0020] In the diagram: 1. Support leg; 2. Shell; 3. Upper cover; 4. First partition; 5. Heat exchange pipe; 6. Arc groove; 7. T-shaped connecting pipe; 8. Heat exchange fins; 9. Pressure relief assembly; 91. First flange; 92. First air guide pipe; 93. First fixed plate; 94. First movable rod; 95. First vent hole; 96. Cover plate; 97. First sealing block; 98. First spring; 99. Second flange; 910. Second air guide pipe; 911. Second fixed plate; 912. Second movable rod; 913. Second air guide hole; 914. Connecting block; 915. Second spring; 916. Second sealing block; 917. Limiting block; 918. Limiting groove; 10. Second partition; 11. Drain hole; 12. Air inlet pipe; 13. Water outlet pipe; 14. Water inlet pipe; 15. Motor; 16. Connecting rod; 17. Turntable; 18. Fan blade; 19. Drain pipe; 20. Valve; 21. Skirt; 22. Air outlet pipe. Detailed Implementation

[0021] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0022] Example 1:

[0023] like Figure 1-5 As shown, this invention is a heat exchanger based on the utilization of waste gas from a steamer, including four support legs 1. The upper parts of the four support legs 1 are fixedly connected to a housing 2. An upper cover 3 is provided on the upper part of the housing 2. A first partition 4 is provided at the lower end of the housing 2. Multiple heat exchange tubes 5 are arranged in a matrix above the first partition 4. The lower ends of the heat exchange tubes 5 are connected to the lower part of the first partition 4. Four arc-shaped grooves 6 are arranged in a matrix on the heat exchange tubes 5. The arc-shaped grooves 6 reduce the internal cross-sectional area of ​​the heat exchange tubes 5. While increasing the surface area, the contact area between the heat exchange tube 5 and the water flow inside the shell 2 is also increased. The upper end of the heat exchange tube 5, which is located in the same vertical plane, is connected to the T-shaped connecting pipe 7. Multiple staggered heat exchange fins 8 are provided between the T-shaped connecting pipe 7 and the first partition 4. The upper end of the T-shaped connecting pipe 7 penetrates the shell 2 and is connected to the pressure relief assembly 9. After the airflow is conducted through the heat exchange tube 5, it accumulates inside the T-shaped connecting pipe 7. The pressure relief assembly 9 can seal the T-shaped connecting pipe 7, so that the residual gas in the steamer can be contained within the heat exchange tube 5. The gas remains inside the heat exchange tube 5 for a longer period of time. After the gas expands inside the T-shaped connecting pipe 7, the pressure relief component 9 can relieve the pressure in the T-shaped connecting pipe 7, allowing the residual gas to flow again inside the heat exchange tube 5 and the T-shaped connecting pipe 7. The heat exchange fins 8 further increase the contact area between the heat exchange tube 5 and the water flow, thereby further increasing the overall heat exchange efficiency of the heat exchanger. The shell 2 is provided with a second partition 10 below the first partition 4. The second partition 10 is provided with multiple matrix-arranged drain holes 11. The residual steam gas inside the heat exchanger... During the heat exchange process, the water vapor inside the residual gas liquefies and forms water that can be discharged through the drain hole 11. The shell 2 is provided with an air inlet pipe 12 above the second partition 10. The residual gas from the steamer to be heat exchanged can be introduced into the shell 2 through the air inlet pipe 12. A water outlet pipe 13 is provided on one side of the upper end of the shell 2. A water inlet pipe 14 is provided on the side of the shell 2 near the water outlet pipe 13 above the first partition 4. Water to be heat exchanged can be added into the shell 2 through the water inlet pipe 14. The water after heat exchange can be discharged through the water outlet pipe 13.

[0024] The pressure relief assembly 9 includes a first flange 91, which is fixedly connected to a T-shaped connecting pipe 7. A first air guide pipe 92 is provided above the first flange 91. A first fixing plate 93 is provided at the lower end of the first air guide pipe 92. A first movable rod 94 is inserted into the middle of the first fixing plate 93. The first movable rod 94 is movably connected to the first fixing plate 93. Four first vent holes 95 arranged in a matrix are opened on the outside of the first movable rod 94 on the first fixing plate 93. The first movable rod 94 is fixedly connected to a cover plate 96 above. A first sealing block 97 is provided at the lower middle of the cover plate 96. The lower end of the first sealing block 97 is shaped as an inverted... The first movable rod 94 is located between the first fixed plate 93 and the first sealing block 97 and is fitted with a first spring 98. When the internal pressure of the T-shaped connecting pipe 7 increases, the internal pressure of the T-shaped connecting pipe 7 pushes the first sealing block 97 and the cover plate 96, causing the first sealing block 97 to separate from the first air guide pipe 92. At this time, the airflow inside the T-shaped connecting pipe 7 can be discharged through the first air guide pipe 92. After the internal pressure of the T-shaped connecting pipe 7 decreases, under the action of the elastic force of the first spring 98, the first sealing block 97 and the cover plate 96 automatically reset. The first sealing block 97 seals the upper end of the first air guide pipe 92, so that the boiler residual gas no longer flows.

[0025] A motor 15 is located at the lower center of the housing 2. The rotating shaft of the motor 15 passes through the housing 2 and is fixedly connected to the connecting rod 16. The upper part of the connecting rod 16 passes through the second partition 10 and is fixedly connected to the turntable 17. Multiple fan blades 18 are arranged in a matrix above the turntable 17. When the motor 15 is working, the motor 15 drives the connecting rod 16 to rotate. Through the transmission of the connecting rod 16, the turntable 17 and the fan blades 18 also rotate. During the rotation of the fan blades 18, the fan blades 18 can drive the airflow, which increases the airflow speed and makes the airflow more evenly distributed inside the housing 2.

[0026] The lower end of the housing 2 is provided with a drain pipe 19, and a valve 20 is provided on the drain pipe 19. The liquefied water flowing out of the drain hole 11 can be discharged through the drain pipe 19, and the valve 20 can control the opening and closing of the drain pipe 19.

[0027] The housing 2 and the upper cover 3 are fixedly connected by a skirt 21.

[0028] The upper end cover 3 is provided with an exhaust pipe 22 at the middle of its upper part, through which the residual steam from the steamer after heat exchange can be discharged.

[0029] Specifically, in this invention, when reusing boiler waste gas, the boiler waste gas outlet is connected to the inlet pipe 12 via a pipe. When the boiler waste gas enters the shell 2, the motor 15 is started. The motor 15 drives the connecting rod 16 to rotate. Through the transmission of the connecting rod 16, the turntable 17 and the fan blades 18 also rotate. The rotating fan blades 18 can drive the airflow, increasing the flow speed of the waste gas and making the airflow more evenly distributed inside the shell 2. Then the airflow enters the heat exchange tube 5. The boiler waste gas exchanges heat with the water above the first partition 4 through the heat exchange tube 5 and the heat exchange fins 8, thereby recovering heat from the boiler waste gas through the water above the first partition 4. After the airflow is conducted through the heat exchange tube 5, at T The pressure inside the T-shaped connecting pipe 7 increases, pushing the first sealing block 97 and the cover plate 96, causing the first sealing block 97 to separate from the first air guide pipe 92. At this time, the airflow inside the T-shaped connecting pipe 7 can be discharged through the first air guide pipe 92. When the pressure inside the T-shaped connecting pipe 7 decreases, the first sealing block 97 and the cover plate 96 automatically reset under the action of the spring force of the first spring 98. The first sealing block 97 seals the upper end of the first air guide pipe 92, so that the boiler residual gas no longer flows. The setting of the pressure relief component 9 allows the boiler residual gas to stay in the heat exchange tube 5 for a longer time, thereby improving the heat exchange effect between the boiler residual gas and the water above the first partition plate 4.

[0030] Example 2:

[0031] like Figure 1-3As described in sections 6 and 7: The pressure relief assembly 9 includes a second flange 99, which is fixedly connected to the T-shaped connecting pipe 7. A second air guide pipe 910 is provided above the second flange 99. A second fixing plate 911 is provided at the upper end of the second air guide pipe 910. A second movable rod 912 is inserted into the middle of the second fixing plate 911. The second movable rod 912 is movably connected to the second fixing plate 911. The second fixing plate 911 has four matrix-arranged second air guide holes 913 on the outside of the second movable rod 912. The second movable rod 912 is fixedly connected to the connecting block 914 below. A second spring 915 is sleeved between the second fixing plate 911 and the connecting block 914. A second sealing block 915 is provided below the connecting block 914. 16. A limiting block 917 is provided at the lower end of the second air guide pipe 910. A limiting groove 918 matching the second sealing block 916 is provided in the middle of the limiting block 917. When the internal pressure of the T-shaped connecting pipe 7 increases, the internal pressure of the T-shaped connecting pipe 7 pushes the second sealing block 916 and the connecting block 914, causing the second sealing block 916 to separate from the limiting block 917. At this time, a connecting channel is formed inside the second air guide pipe 910, and the boiler residual gas inside the T-shaped connecting pipe 7 can be discharged through the second air guide pipe 910. After the internal pressure of the T-shaped connecting pipe 7 decreases, under the action of the elastic force of the second spring 915, the second sealing block 916 is inserted into the limiting groove 918, and the second sealing block 916 seals the second air guide pipe 910, so that the boiler residual gas no longer flows.

[0032] Specifically, in this invention, when reusing boiler waste gas, the boiler waste gas outlet is connected to the inlet pipe 12 via a pipe. When the boiler waste gas enters the shell 2, the motor 15 is started. The motor 15 drives the connecting rod 16 to rotate. Through the transmission of the connecting rod 16, the turntable 17 and the fan blades 18 also rotate. The rotating fan blades 18 can drive the airflow, increasing the flow speed of the waste gas and making the airflow more evenly distributed inside the shell 2. Then the airflow enters the heat exchange tube 5. The boiler waste gas exchanges heat with the water above the first partition 4 through the heat exchange tube 5 and the heat exchange fins 8, thereby recovering heat from the boiler waste gas through the water above the first partition 4. After the airflow is conducted through the heat exchange tube 5, it accumulates inside the T-shaped connecting pipe 7. After the internal pressure of the T-shaped connecting pipe 7 increases, the internal pressure of the T-shaped connecting pipe 7 pushes the second sealing block 916 and the connecting block 914, causing the second sealing block 916 to separate from the limiting block 917. At this time, a connecting channel is formed inside the second air guide pipe 910, and the boiler residual gas inside the T-shaped connecting pipe 7 can be discharged through the second air guide pipe 910. After the internal pressure of the T-shaped connecting pipe 7 decreases, under the action of the elastic force of the second spring 915, the second sealing block 916 is inserted into the limiting groove 918. The second sealing block 916 seals the second air guide pipe 910, so that the boiler residual gas no longer flows. The setting of the pressure relief component 9 allows the boiler residual gas to stay in the heat exchange tube 5 for a longer time, thereby improving the heat exchange effect between the boiler residual gas and the water above the first partition 4.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A heat exchanger based on the utilization of waste gas from a steamer, comprising a support leg (1), characterized in that, The support legs (1) are provided in four parts, and the upper part of the four support legs (1) is fixedly connected to the shell (2). The upper part of the shell (2) is provided with an upper end cover (3). The lower part of the shell (2) is provided with a first partition plate (4). The first partition plate (4) is provided with multiple heat exchange tubes (5) arranged in a matrix. The heat exchange tubes (5) are provided with four arc-shaped grooves (6) arranged in a matrix. The upper part of the heat exchange tubes (5) located in the same vertical plane is connected to a T-shaped connecting pipe (7). The T-shaped connecting pipe (7) and the first partition plate (4) are provided with multiple staggered rows. The heat exchange fins (8) of the cloth, the upper end of the T-shaped connecting pipe (7) passes through the shell (2) and is connected to the pressure relief assembly (9), the shell (2) is provided with a second partition (10) below the first partition (4), the second partition (10) is provided with a plurality of drainage holes (11) arranged in a matrix, the shell (2) is provided with an air inlet pipe (12) above the second partition (10), the upper end of the shell (2) is provided with a water outlet pipe (13), and the side of the shell (2) near the water outlet pipe (13) above the first partition (4) is provided with a water inlet pipe (14).

2. A heat exchanger based on the utilization of waste gas from a steamer according to claim 1, characterized in that, The pressure relief assembly (9) includes a first flange (91), which is fixedly connected to a T-shaped connecting pipe (7). A first air guide pipe (92) is provided above the first flange (91). A first fixing plate (93) is provided at the lower end of the first air guide pipe (92). A first movable rod (94) is inserted into the middle of the first fixing plate (93). Four first vent holes (95) are arranged in a matrix on the outside of the first movable rod (94) of the first fixing plate (93). The first movable rod (94) is fixedly connected to a cover plate (96) above. A first sealing block (97) is provided in the middle of the lower part of the cover plate (96). A first spring (98) is sleeved between the first fixing plate (93) and the first sealing block (97) of the first movable rod (94).

3. A heat exchanger based on the utilization of waste gas from a steamer according to claim 1, characterized in that, The pressure relief assembly (9) includes a second flange (99), which is fixedly connected to a T-shaped connecting pipe (7). A second air guide pipe (910) is provided above the second flange (99). A second fixing plate (911) is provided at the upper end of the second air guide pipe (910). A second movable rod (912) is inserted into the middle of the second fixing plate (911). Four matrix-arranged second air guide holes (912) are opened on the second fixing plate (911) outside the second movable rod (912). 3) The second movable rod (912) is fixedly connected to the connecting block (914) below. The second movable rod (912) is located between the second fixed plate (911) and the connecting block (914) and is fitted with a second spring (915). The connecting block (914) is provided with a second sealing block (916) below. The lower end of the second air guide pipe (910) is provided with a limiting block (917). The limiting block (917) is provided with a limiting groove (918) that matches the second sealing block (916) in the middle.

4. A heat exchanger based on the utilization of waste gas from a steamer according to claim 1, characterized in that, A motor (15) is provided in the lower middle part of the housing (2). The rotating shaft of the motor (15) passes through the housing (2) and is fixedly connected to the connecting rod (16). The upper part of the connecting rod (16) passes through the second partition (10) and is fixedly connected to the turntable (17). Multiple fan blades (18) are arranged in a matrix above the turntable (17).

5. A heat exchanger based on the utilization of waste gas from a steam boiler according to claim 1, characterized in that, The lower end of the housing (2) is provided with a drain pipe (19), and a valve (20) is provided on the drain pipe (19).

6. A heat exchanger based on the utilization of waste gas from a steam boiler according to claim 1, characterized in that, The shell (2) and the upper cover (3) are fixedly connected by a skirt (21).

7. A heat exchanger based on the utilization of waste gas from a steam boiler according to claim 1, characterized in that, An air outlet pipe (22) is provided in the middle of the upper part of the upper end cover (3).

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