A multifunctional, rapid heating waste heat recovery device

Abstract

This invention relates to the field of waste heat recovery in gas stoves, and more specifically to a multifunctional rapid heating waste heat recovery device, comprising a hot water collection tank, a warm water tank, a heating water tank, a heat exchanger, a drainage control device, and a gas duct. The warm water tank is fixedly installed above the hot water collection tank, and an inlet pipe is provided at the upper end of the warm water tank. This invention uses a spiral exhaust pipe to vent water vapor from the hot water collection tank and heat the water in the warm water tank, so that the entire waste heat recovery device can provide both hot and warm water. Furthermore, the preheating effect of the warm water tank greatly increases the heating speed of the water in the heating water tank when the warm water enters the heating water tank. This invention uses the water vapor generated by the heating water tank to control the timely discharge of water from the heating water tank, making the drainage control device simpler in structure, lower in cost, and more stable in effect.

Description

Technical Field

[0001] This invention relates to the field of waste heat recovery technology for gas stoves, and more particularly to a multifunctional, rapid-heating waste heat recovery device. Background Technology

[0002] With the increasing emphasis placed on environmental protection by the country, saving energy, reducing carbon emissions, and reducing pollutant emissions have become the main goals of various energy-consuming industries. In recent years, with the gradual improvement of people's living standards, the catering industry has developed greatly. However, the catering industry consumes a lot of energy every day and emits a lot of waste heat and kitchen waste. The fuel consumption during the cooking process, the daily drinking water and washing water in the kitchen are all constantly consuming energy and emitting carbon dioxide.

[0003] To reduce carbon emissions and energy loss, existing commercial gas stoves typically recover and utilize the heat from the high-temperature flue gas (approximately 500-600°C) generated during combustion through heat exchange tubes. This heat can be used to heat water or provide steam. However, existing waste heat recovery devices generally exchange heat directly with water through heat exchange tubes. Furthermore, to heat more water, the water tank is usually very large and contains a lot of water. This results in a long heating time required for the water in the tank to boil, meaning that when the stove starts working and there is a demand for hot water, the water tank cannot provide hot water in a timely manner. Summary of the Invention

[0004] Therefore, this invention was made in view of the above problems. The purpose of this invention is to solve the problem that existing waste heat recovery devices cannot provide hot water in a timely manner when they first start working by setting up a small heating water tank and a drainage control device, using the pressure of water vapor to ensure that the hot water is discharged in a timely manner after the heating water tank has finished heating the water, and then adding water from the warm water tank into the heating water tank. This invention achieves the above objective through the following technical solution:

[0005] A multifunctional rapid heating waste heat recovery device includes a hot water collection tank, a warm water tank, a heating water tank, a heat exchanger, a drainage control device, and a vent pipe. The warm water tank is fixedly installed above the hot water collection tank, and an inlet pipe is provided at the upper end of the warm water tank. The heating water tank is fixedly installed inside the warm water tank, and an exhaust pipe and an exhaust pipe are provided on the upper end cover of the heating water tank. The exhaust pipe is equipped with a pressure control valve at the position where it communicates with the interior of the heating water tank. A drain outlet and a pressure valve are symmetrically arranged at the bottom front and rear of the heating water tank. The heat exchanger is fixedly installed inside the heating water tank. The heat exchanger includes a heat exchange core, an inlet pipe, and an exhaust pipe. The exhaust pipe and the inlet pipe are respectively located at the upper and lower ends of the heat exchange core. The heat exchange core includes a heat exchange tube and a smoke distribution plate. The heat exchange tube is fixedly connected to the smoke distribution plate at both ends; a guide protrusion is provided in the middle of the smoke distribution plate; the drainage control device is fixedly installed on one side of the warm water tank, and the drainage control device includes: a steam cylinder, a slide cylinder and a valve stem, wherein the steam cylinder is fixedly installed on the side wall of the warm water tank near the exhaust pipe; the steam cylinder is internally connected to the exhaust pipe on the heating water tank, the slide cylinder is fixedly installed directly below the steam cylinder near the drain outlet, and one end of the slide cylinder is connected to the drain outlet, and the other end is connected to the inside of the hot water collection tank; the upper end of the valve stem is provided with a gas piston and the lower end is provided with a control piston, and the valve stem is slidably connected inside the steam cylinder and the slide cylinder, wherein the gas piston is located inside the steam cylinder and the control piston is located inside the slide cylinder.

[0006] Preferably, the water inlet pipe is controlled to open and close by a solenoid valve.

[0007] Preferably, the warm water tank is equipped with an exhaust pipe, which is a spiral tube and can communicate with the interior of the hot water collection tank.

[0008] Preferably, the lower end of the smoke inlet pipe is connected to the inside of the stove; the upper end of the smoke exhaust pipe is connected to the outside.

[0009] Preferably, a steaming box is provided on the left side of the hot water collection tank, and the top of the steaming box is connected to the exhaust pipe via a vent pipe.

[0010] Preferably, a valve is provided at the connection between the air guide pipe and the exhaust pipe.

[0011] Beneficial effects of this invention:

[0012] 1. This invention designs the heating water tank to have a small volume, and then uses a drainage control device to promptly discharge the heated water from the heating water tank and add water from the warm water tank to the heating water tank, so that the heating water tank can quickly heat a small volume of water in a short time when it starts working and supply it to the outside in a timely manner.

[0013] 2. This invention uses a spiral exhaust pipe to vent water vapor from the hot water collection tank and heat the water in the warm water tank, so that the entire waste heat recovery device can provide both hot and warm water. Furthermore, the preheating effect of the warm water tank greatly increases the heating speed of the water in the heating tank when the warm water enters the heating tank.

[0014] 3. This invention utilizes the steam generated by the heating water tank to control the timely discharge of water from the heating water tank, making the drainage control device simpler in structure, lower in cost, and more stable in effect. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a multifunctional rapid heating waste heat recovery device according to the present invention.

[0016] Figure 2 This is a partial structural schematic diagram of a multifunctional rapid heating waste heat recovery device according to the present invention.

[0017] Figure 3 This is an exploded view of the heat exchanger in a multifunctional rapid heating waste heat recovery device of the present invention.

[0018] Figure 4 This is a top view of a multifunctional rapid heating waste heat recovery device according to the present invention.

[0019] Figure 5 for Figure 4 Sectional view along line AA.

[0020] Figure 6 for Figure 4 Sectional view along the BB line.

[0021] Figure Descriptions: 100, Hot water collection tank; 200, Warm water tank; 210, Inlet pipe; 220, Exhaust pipe; 300, Heating water tank; 310, Exhaust pipe one; 311, Pressure control valve; 320, Exhaust pipe two; 330, Drain outlet; 340, Pressure valve port; 400, Heat exchanger; 410, Heat exchange core; 411, Heat exchange tube; 412, Smoke distribution plate; 413, Guide protrusion; 420, Smoke inlet pipe; 430, Smoke exhaust pipe; 500, Drainage control device; 510, Steam cylinder; 520, Slide cylinder; 530, Valve stem; 531, Gas piston; 532, Control piston; 600, Air guide pipe; 610, Valve; 700, Steamer. Detailed Implementation

[0022] Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention can also be implemented in various different forms, and therefore the present invention is not limited to the embodiments described below. In addition, for the purpose of more clearly describing the present invention, parts not connected to the invention will be omitted from the drawings.

[0023] like Figure 1 As shown, a multifunctional rapid heating waste heat recovery device includes: a hot water collection tank 100, a warm water tank 200, a heating water tank 300, a heat exchanger 400, a drainage control device 500, a vent pipe 600, and a steam oven 700.

[0024] like Figures 1 to 6 As shown, the hot water collection tank 100 is a box structure with an insulated inner wall that can hold and keep a certain amount of hot water warm. The warm water tank 200 is fixedly installed above the hot water collection tank 100. The upper end of the warm water tank 200 is provided with a water inlet pipe 210, which is controlled to open and close by a solenoid valve. The interior of the warm water tank 200 is also provided with an exhaust pipe 220, which is a spiral tube. The interior of the exhaust pipe 220 can communicate with the interior of the hot water collection tank 100, and the exhaust pipe 220 can discharge the water vapor generated inside the hot water collection tank 100.

[0025] The heating water tank 300 is fixedly installed inside the warm water tank 200. The heating water tank 300 is a cylindrical shell structure. The upper end cover of the heating water tank 300 is equipped with a first exhaust pipe 310 and a second exhaust pipe 320. Both exhaust pipes 310 and 320 can communicate with the interior of the heating water tank 300. Furthermore, a pressure control valve 311 is installed at the point where exhaust pipe 310 communicates with the interior of the heating water tank 300. The pressure control valve 311 can only be used inside the heating water tank 300. The valve will only open when the pressure reaches a certain threshold. The heating water tank 300 has symmetrically arranged drain outlets 330 and pressure valve ports 340 at its lower front and rear. Drain outlets 330 are connected to the interior of the heating water tank 300 to drain water from inside. Pressure valve port 340 is a pressure-controlled valve; when the pressure difference between the inside and outside of the heating water tank 300 reaches a specified value, pressure valve port 340 will open, connecting the heating water tank 300 to the warm water tank 200, allowing water from the warm water tank 200 to enter the heating water tank. Inside the heating water tank 300, the heat exchanger 400 is fixedly installed. The heat exchanger 400 includes: a heat exchange core 410, an inlet pipe 420, and an outlet pipe 430. The heat exchange core 410 includes: a heat exchange tube 411, a smoke distribution plate 412, and a guide protrusion 413. The heat exchange tube 411 is a hollow pipe, four in number, and is evenly fixedly installed on the smoke distribution plate 412 in the circumferential direction. The smoke distribution plate 412 has a guide protrusion 413 inside, which allows the flow to... The flue gas entering the flue plate 412 can enter each heat exchange tube 411 more smoothly and evenly. The flue gas inlet pipe 420 is fixedly installed below the heat exchange core 410. One end of the flue gas inlet pipe 420 is connected to the inside of the flue plate 412, and the other end is connected to the inside of the stove (not shown in the figure). The flue gas inlet pipe 420 can discharge the flue gas generated in the stove into the flue plate 412. The flue gas exhaust pipe 430 is fixedly installed at the other end of the heat exchange core 410. The flue gas exhaust pipe 430 can discharge the flue gas inside the heat exchange core 410.

[0026] like Figure 4-5As shown, the drainage control device 500 is fixedly installed on one side of the warm water tank 200. The drainage control device 500 includes: a steam cylinder 510, a slide cylinder 520, and a valve stem 530. The steam cylinder 510 is fixedly installed on the side wall of the warm water tank 200 near the exhaust pipe 310, and the steam cylinder 510 can communicate with the interior of the exhaust pipe 310 on the heating water tank 300. The slide cylinder 520 is fixedly installed directly below the steam cylinder 510 near the drain outlet 330, and one end of the slide cylinder 520 is connected to the drain outlet 330, and the other end is connected to the interior of the hot water collection tank 100. The valve stem 530 has a gas piston 531 at the upper end and a control piston 532 at the lower end. The valve stem 530 is movably installed inside the steam cylinder 510 and the slide cylinder 520, wherein the gas piston 531 is located inside the steam cylinder 510, and the control piston 532 is located inside the slide cylinder 520.

[0027] like Figure 2 As shown, one end of the air guide pipe 600 is connected to and communicates with the exhaust pipe 320, and the other end is connected to and communicates with the interior of the steam oven 700. A valve 610 is also provided at the connection between the air guide pipe 600 and the exhaust pipe 320. The valve 610 can control the communication between the exhaust pipe 320 and the air guide pipe 600. The steam oven 700 is a steam oven, which is fixedly installed at one end of the warm water tank 200. Under the control of the valve 610, the air guide pipe 600 guides the water vapor in the heating water tank 300 into the steam oven 700. The high-temperature water vapor in the steam oven 700 can heat the food.

[0028] Working principle of this invention:

[0029] Tap water enters the warm water tank 200 through the inlet pipe 210, and then enters the heating water tank 300 through the pressure valve 340. As water continuously enters the heating water tank 300, the pressure difference across the pressure valve 340 gradually decreases until it falls below the opening value, at which point the pressure valve 340 closes. When the water level in the warm water tank 200 reaches the designated position, the inlet pipe 210 closes. The high-temperature flue gas generated by the combustion of natural gas in the stove enters the heat exchange core 410 through the flue pipe 420, then flows through each heat exchange tube 411 within the heat exchange core 410, and finally exits through the exhaust pipe 430. As the high-temperature flue gas flows through the heat exchange tubes 411, it transfers heat to the water in the heating water tank 300. Once the water in the heating water tank 300 begins to boil, a large amount of water vapor will be generated in the heating water tank 300 in a short period of time until the pressure of the water vapor reaches a certain level. When the opening threshold of pressure control valve 311 is reached, pressure control valve 311 opens, and water vapor enters the steam cylinder 510 on the drain control device 500 through exhaust pipe 310. Under the pressure of the water vapor, valve stem 530 begins to move upward until control piston 532 opens drain port 330. Hot water in heating water tank 300 begins to flow into slide cylinder 520 through drain port 330 and is discharged into the lower hot water collection tank 100 through slide cylinder 520. When hot water in heating water tank 300 begins to drain, due to the decrease in water vapor pressure at the upper end of heating water tank 300, the pressure control valve 311 closes when the pressure is lower than the opening threshold, and valve stem 530 stops moving. When the hot water in heating water tank 300 is almost drained, the water level sensor at the bottom of heating water tank 300 senses that the water level has reached the specified level and opens water inlet pipe 210.The cool water in the inlet pipe 210 flows directly to the pressure control valve 311 and the exhaust pipe 310 at the lower end. Because the water in the inlet pipe 210 has a cooling effect, the water vapor in the pressure control valve 311 and the exhaust pipe 310 begins to liquefy upon contact with the cold water. The water vapor pressure in the steam cylinder 510 begins to decrease, and the valve stem 530 will begin to move downwards under gravity until it closes the drain outlet 330 and stops moving. At this time, due to the rise in the water level in the warm water tank 200, the pressure difference between the inside and outside of the pressure valve 340 increases, reaching the opening threshold of the pressure valve 340. The pressure valve 340 will then open, and the water in the warm water tank 200 will re-enter the heating water tank 300. Since the flue pipe 420 passes through the hot water collection tank 100, the flue pipe 420 will insulate the hot water in the hot water collection tank 100, and the hot water in the hot water collection tank 100... The water vapor produced by the water supply will flow out through the exhaust pipe 220. As the steam flows through the exhaust pipe 220, it heats the water in the warm water tank 200. Because the warm water tank 200 contains a large amount of water and is frequently circulated with cold water, the water temperature in the warm water tank 200 will not be too high. Therefore, the warm water tank 200 can supply warm water to the outside. When food needs to be heated, valve 610 is manually opened. At this time, the steam generated in the heating water tank 300 will begin to enter the air guide pipe 600 through the exhaust pipe 320 and then flow into the steam oven 700 to begin heating the food in the steam oven 700. When the water in the heating water tank 300 has completely turned into steam, the water level sensor at the bottom of the heating water tank 300 will detect this and open the water inlet. Then, the pressure valve 340 will open, promptly adding water to the heating water tank 300.

Claims

1. A multifunctional rapid heating waste heat recovery device, comprising: A hot water collection tank (100), a warm water tank (200), a heating water tank (300), a heat exchanger (400), and a drainage control device (500); characterized in that: the warm water tank (200) is fixedly installed above the hot water collection tank (100); the heating water tank (300) is fixedly installed inside the warm water tank (200); the heat exchanger (400) is fixedly installed inside the heating water tank (300); and the drainage control device (500) is fixedly installed on one side of the warm water tank (200); The heating water tank (300) has an exhaust pipe 1 (310) and an exhaust pipe 2 (320) on its end cap. The exhaust pipe 1 (310) has a pressure control valve (311) at its connection point with the interior of the heating water tank (300). The heat exchanger (400) includes a heat exchange core (410), an inlet pipe (420), and an exhaust pipe (430). The exhaust pipe (430) and the inlet pipe (420) are respectively located at the upper and lower ends of the heat exchange core (410). The drainage control device (500) includes a steam cylinder (510). The slide cylinder (520) and valve stem (530); the steam cylinder (510) is fixedly installed on the side wall of the warm water tank (200) near the exhaust pipe (310); the steam cylinder (510) is internally connected to the exhaust pipe (310) on the heating water tank (300); the slide cylinder (520) is fixedly installed directly below the steam cylinder (510) near the drain outlet (330), one end of the slide cylinder (520) is connected to the drain outlet (330), and the other end is connected to the inside of the hot water collection tank (100); The valve stem (530) is provided with a gas piston (531) at the upper end and a control piston (532) at the lower end. The valve stem (530) is slidably connected to the interior of the steam cylinder (510) and the slide cylinder (520). The gas piston (531) is located in the steam cylinder (510) and the control piston (532) is located in the slide cylinder (520). The drain outlet (330) is located below the heating water tank (300). The water inlet pipe (210) at the upper end of the warm water tank (200) is controlled by a solenoid valve, and its outlet end is set with a pressure control valve (311) and an exhaust pipe (310). The bottom of the heating water tank (300) is provided with a water level sensor, which is electrically connected to the solenoid valve to control the opening and closing of the water inlet pipe (210).

2. The multifunctional rapid heating waste heat recovery device according to claim 1, characterized in that: The warm water tank (200) is provided with an inlet pipe (210) at the upper end; the heating water tank (300) is provided with a drain outlet (330) and a pressure valve outlet (340) symmetrically arranged at the bottom front and back.

3. The multifunctional rapid heating waste heat recovery device according to claim 2, characterized in that: The heat exchange core (410) includes a heat exchange tube (411), a smoke distribution plate (412), and a flow guide protrusion (413); the upper and lower ends of the heat exchange tube (411) are fixedly connected to the smoke distribution plate (412); the flow guide protrusion (413) is provided in the middle of the smoke distribution plate (412).

4. The multifunctional rapid heating waste heat recovery device according to claim 3, characterized in that: The lower end of the smoke inlet pipe (420) is connected to the inside of the stove; the upper end of the smoke exhaust pipe (430) is connected to the outside.

5. The multifunctional rapid heating waste heat recovery device according to claim 4, characterized in that: The warm water tank (200) is equipped with an exhaust pipe (220), which is a spiral tube and can communicate with the interior of the hot water collection tank (100).

6. The multifunctional rapid heating waste heat recovery device according to claim 5, characterized in that: A steamer (700) is provided on the left side of the hot water collection tank (100).

7. A multifunctional rapid heating waste heat recovery device according to claim 6, characterized in that: The top of the steam oven (700) is connected to the exhaust pipe (320) via the air guide pipe (600), and a valve (610) is provided at the connection between the air guide pipe (600) and the exhaust pipe (320).

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