Waste heat recovery type high thermal efficiency steam box

Abstract

The invention discloses a waste heat recovery type high thermal efficiency steam box which comprises a box body, a heat exchange water tank and a steam box workbench, the heat exchange water tank is installed in the box body, a sine wave heat exchanger is installed at the bottom of the heat exchange water tank, and a fire grate is connected under the sine wave heat exchanger through a fire grate connecting plate fixed to the heat exchange water tank. A pulse igniter for igniting the fire grate is installed in the box body, a smoke channel is installed on the outer wall of the heat exchange water tank in a surrounding mode, the front end of the smoke channel is communicated with the sine wave heat exchanger, a fan is installed at the tail end of the smoke channel through a fan connecting plate, and a motor for providing power is installed below the fan. A steam box workbench is installed on the upper portion of the heat exchange water tank. According to the waste heat recovery type high-heat-efficiency steam box, the sine wave heat exchanger is adopted, the heat exchange efficiency is improved, and water scale is convenient to clean; and a surrounding type flue gas channel is adopted, flue gas waste heat utilization is achieved, and the heat efficiency is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of steamers, and in particular to a waste heat recovery type steamer with high thermal efficiency. Background Art

[0002] At present, there are three main types of heat exchange products on the market: 1. Directly burn iron pots to boil water. This product has a long life and simple maintenance, but it consumes the most gas and is very energy-inefficient; 2. The heat exchange device is composed of multiple stainless steel round tubes connected in parallel, water is passed through the tubes, and the fire is burned outside the stainless steel tubes. This heat exchange device cannot be cleaned after scaling. Over time, due to the deterioration of thermal conductivity, the stainless steel tubes are directly burned through, commonly known as pipe bursting. The life of the whole machine is short in areas with poor water quality; 3. The heat exchange device is made of "U"-shaped square steel pipes welded together and placed in the water tank. The fan discharges the hot flue gas generated by the fire exhaust through the square pipe. This kind of heat exchange has a longer life than the second type, but it will form a dead corner of the water tank, the scale cannot be cleaned, the flue gas is not recycled, the gas consumption is large, the energy consumption is high, and the economic benefits are low. The above three heat exchange products do not recycle the flue gas, so the thermal efficiency is low and it is not energy-saving. Summary of the invention

[0003] The purpose of the present invention is to provide a waste heat recovery type high thermal efficiency steamer to solve the technical problems of traditional products such as high energy consumption, low heat exchange efficiency, difficult to clean water tank scale, and inability to recycle flue gas waste heat.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: comprising a box body, a heat exchange water tank and a steamer workbench, wherein a heat exchange water tank is installed inside the box body, a sine wave heat exchanger is installed at the bottom of the heat exchange water tank, the sine wave heat exchanger is in a wave convex shape, and comprises a heating surface facing the flame and a heating surface for boiling water, a fire bar is connected to the sine wave heat exchanger directly below the sine wave heat exchanger through a fire bar connecting plate fixed on the heat exchange water tank, a pulse igniter for igniting the fire bar is installed in the box body, a smoke channel is installed around the outer wall of the heat exchange water tank, the front end of the smoke channel is connected to the sine wave heat exchanger, a fan is installed at the rear end of the smoke channel through a fan connecting plate, a motor for providing power is installed below the fan, and a steamer workbench is installed on the upper part of the heat exchange water tank.

[0005] Furthermore, an external water-adding tank is installed on the upper part of the box body, one side of the external water-adding tank is close to the smoke channel, and the external water-adding tank is connected to the heat exchange tank.

[0006] Furthermore, an expansion joint for clamping the flue gas channel is installed on the heat exchange water tank.

[0007] Furthermore, a water collecting trough is provided at the edge of the steamer workbench, and the water collecting trough is connected to an overflow water tank fixed on the steamer workbench for collecting overflow water.

[0008] Furthermore, a motor protection cover is arranged outside the motor.

[0009] Furthermore, at least one steam port is provided on the steam box workbench, and the steam port is connected to the heat exchange water tank.

[0010] Furthermore, the sinusoidal wave heat exchanger and the heat exchange water tank are integrally formed or welded together.

[0011] Compared with the prior art, the beneficial effects of the present invention are: a sinusoidal wave heat exchanger is used to improve heat exchange efficiency, facilitate cleaning of water tank scale, and extend the service life of the whole machine; a surround-type flue gas channel is used to realize flue waste heat transfer, realize flue gas waste heat utilization, and greatly improve thermal efficiency; an external water tank is added to facilitate water replenishment of the heat exchange water tank, further improving the utilization of flue gas waste heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a front view structural schematic diagram of the present invention;

[0013] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention;

[0014] Figure 3 It is a schematic diagram of the internal structure of the present invention;

[0015] Figure 4 This is a schematic diagram of the internal structure of the present invention without the box body;

[0016] Figure 5 This is a diagram of the internal structure of the present invention from a second viewing angle;

[0017] Figure 6 It is a schematic diagram of the structure of the heat exchange water tank and the sine wave heat exchanger of the present invention;

[0018] Figure 7 This is a schematic diagram of the structure of the sinusoidal wave heat exchanger of the present invention. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-6The present invention provides a technical solution for a waste heat recovery type high thermal efficiency steamer: it includes a box body 1, a heat exchange water tank 2 and a steamer workbench 3. The heat exchange water tank 2 is installed inside the box body 1. A sine wave heat exchanger 4 is installed at the bottom of the heat exchange water tank 2. The sine wave heat exchanger 4 is in a wave convex shape, including a heating surface 41 facing the flame and a heating surface 42 for boiling water. The heating surface 41 directly contacts the flame, the flame fills the heating surface, and the heating surface 42 contacts the water in the water tank, directly transferring heat to the water, greatly increasing the heat transfer area, improving the heat exchange efficiency, quickly boiling the water in the heat exchange water tank, generating steam, and at the same time, no dead angle is formed, which is convenient for brushes and other tools to clean the scale inside the water tank. The sine wave heat exchanger 4 is connected to a fire bar 6 through a fire bar connecting plate 5 fixed on the heat exchange water tank 2 directly below the sine wave heat exchanger 4. The fire bar 6 of this embodiment is an existing Technical product, the fire grate is a prior art product, which is a combustion device connected to a gas pipe and heats the sinusoidal wave heat exchanger 4 through combustion. A pulse igniter 17 for igniting the fire grate 6 is installed in the box body 1. A smoke channel 7 is installed around the outer wall of the heat exchange water tank 2. The smoke channel adopts a surrounding design to increase the length of the smoke channel, improve the efficiency of waste heat utilization, and reduce the temperature of the exhaust gas, which is more conducive to environmental protection. The front end of the smoke channel 7 is connected to the sinusoidal wave heat exchanger 4, and the smoke on the heating surface of the sinusoidal wave heat exchanger 4 enters the smoke channel 7. A fan 9 is installed at the rear end of the smoke channel 7 through a fan connecting plate 8. The smoke channel is connected to the fan outlet, and the smoke is discharged through the negative pressure generated by the fan. A motor 10 for providing power is installed below the fan 9, and a steamer workbench 3 is installed on the upper part of the heat exchange water tank 2.

[0021] An external water-adding tank 11 is installed on the upper part of the box body 1. One side of the external water-adding tank 11 is close to the flue gas channel 7. The external water-adding tank 11 is connected to the heat exchange water tank 2. A float valve is arranged in the heat exchange water tank. The external water-adding tank is connected to the heat exchange water tank through the float valve, which is convenient for replenishing water to the heat exchange water tank and further improving the waste heat utilization efficiency.

[0022] An expansion joint 12 for clamping the smoke passage 7 is installed on the heat exchange water tank 2 to prevent the smoke passage from deforming and bending due to high temperature.

[0023] A water collecting trough 13 is arranged at the edge of the steamer workbench 3, and the water collecting trough 13 is connected to an overflow water tank 14 fixed on the steamer workbench 3 for collecting waste water, so as to facilitate the collection of water on the steamer workbench.

[0024] A motor protection cover 15 is arranged outside the motor 10 to play a protective role.

[0025] The steam box workbench 3 is provided with at least one steam port 16 , and the steam port 16 is connected to the heat exchange water tank 2 .

[0026] The sine wave heat exchanger 4 and the heat exchange water tank 2 are integrally formed or welded together. The integral forming is pressed into one piece by a mold, and the welding connection is convenient for partial assembly. The specific fixing method is based on the specific product and requirements.

[0027] Working principle: The fire grate is connected to the gas pipe, and the pulse igniter ignites the fire grate. The generated flame is directly aimed at the heating surface of the sinusoidal wave heat exchanger, and the flame fills the heating surface. The sinusoidal wave heat exchanger adopts a wave shape and has a large contact area with the water in the water tank, which increases the speed of heat transfer and can quickly boil the water in the heat exchange water tank to generate steam, which is transferred to the steamer workbench through the steam port, making it convenient and quick to steam things. The flame that has contacted the sinusoidal wave heat exchanger generates smoke and enters the smoke channel connected to the sinusoidal wave heat exchanger. The smoke channel is in close contact with the heat exchange water tank and the external water tank, and can transfer the waste heat to the heat exchange water tank and the external water tank to realize the utilization of waste heat. Since the smoke channel adopts a surrounding design, the length of the smoke channel is increased, the efficiency of waste heat utilization is improved, the temperature of the exhaust gas is reduced, and it is more conducive to environmental protection. The used smoke is discharged through the fan outlet. After the food is steamed, the machine is turned off.

[0028] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A waste heat recovery type high thermal efficiency steamer, comprising a steamer body (1), a heat exchange water tank (2) and a steamer workbench (3), characterized in that: A heat exchange water tank (2) is installed inside the box body (1), and a sine wave heat exchanger (4) is installed at the bottom of the heat exchange water tank (2). The sine wave heat exchanger (4) is in a wave convex shape, and includes a heating surface (41) facing the flame and a heating surface (42) for boiling water. A fire bar (6) is connected directly below the sine wave heat exchanger (4) through a fire bar connecting plate (5) fixed on the heat exchange water tank (2). A pulse igniter (17) for igniting the fire bar (6) is installed inside the box body (1). A smoke channel (7) is installed around the outer wall of the heat exchange water tank (2). The front end of the smoke channel (7) is connected to the sine wave heat exchanger (4). A fan (9) is installed at the rear end of the smoke channel (7) through a fan connecting plate (8). A motor (10) for providing power is installed below the fan (9). A steam box workbench (3) is installed on the upper part of the heat exchange water tank (2).

2. The steamer according to claim 1, characterized in that: An external water-adding tank (11) is installed on the upper part of the box body (1), one side of the external water-adding tank (11) is in close contact with the smoke passage (7), and the external water-adding tank (11) is connected to the heat exchange water tank (2).

3. The steamer according to claim 1, characterized in that: The heat exchange water tank (2) is provided with an expansion joint (12) for clamping the smoke passage (7).

4. The steamer according to claim 1, characterized in that: A water collecting trough (13) is provided at the edge of the steamer workbench (3), and the water collecting trough (13) is connected to an overflow water tank (14) fixed on the steamer workbench (3) for collecting overflow water.

5. The steamer according to claim 1, characterized in that: A motor protection cover (15) is arranged outside the motor (10).

6. The steamer according to claim 1, characterized in that: The steam box workbench (3) is provided with at least one steam port (16), and the steam port (16) is connected to the heat exchange water tank (2).

7. The steamer according to claim 1, characterized in that: The sinusoidal wave heat exchanger (4) and the heat exchange water tank (2) are integrally formed or connected by welding.

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