Waste heat recovery device and range hood

Abstract

The utility model provides a waste heat recovery device and a range hood, the waste heat recovery device comprises a water tank and an oil smoke pipe, the inlet end of the oil smoke pipe is communicated with a smoke outlet of the range hood, the water tank is annularly arranged on the circumferential surface of the oil smoke pipe, the water tank comprises a water inlet and a water outlet, and a plurality of guide plates are arranged in the water tank. The flow guide plates are arranged in the axial direction perpendicular to the oil smoke pipe, and in the axial direction, the multiple flow guide plates are arranged in the water tank at intervals, so that cavities are formed between the flow guide plates and a shell of the water tank or between every two adjacent flow guide plates, and every two adjacent cavities communicate with each other. According to the waste heat recovery device and the range hood, a plurality of guide plates are arranged in the water tank to form a plurality of mutually communicated cavities, so that the flowing path of water in the water tank is prolonged, the water flow speed is reduced, sufficient heat exchange is performed between water flow and oil smoke, and the heat exchange efficiency is improved. The device is simultaneously used as a decorative cover of the smoke exhaust pipeline of the range hood, so that waste heat recovery and beautification of the smoke exhaust pipeline are realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of kitchen home appliances, in particular to a waste heat recovery device and a range hood. BACKGROUND

[0002] At present, in the scheme of oil fume waste heat recovery, heat loss is relatively serious, mainly embodied in heat loss in heat transfer pipeline. Some adopt the scheme of wrapping the pipeline outside with a heat preservation layer, which can reduce heat loss in heat transfer pipeline, but the effect is not significant. Some adopt a return air system (i.e. sending the oil fume recovered by primary heat recovery into the recovery air pipe again), which can theoretically reduce pipeline heat loss, but in fact, after mixing the oil fume recovered by primary heat recovery and secondary heat recovery, the total temperature of the oil fume drops, resulting in low heat exchanger heat exchange efficiency. In general, neither of the two can improve the efficiency of "heat to heat". SUMMARY

[0003] The utility model wants to solve the technical problem that in the prior art, when the range hood recovers oil fume waste heat, the heat exchange efficiency is low and the waste heat recovery effect is poor, and provides a waste heat recovery device and a range hood.

[0004] The utility model solves the above technical problem by the following technical scheme:

[0005] A waste heat recovery device is provided for a range hood, which comprises a water tank and an oil fume pipe. The inlet end of the oil fume pipe is connected to the smoke outlet of the range hood. The water tank is arranged around the circumferential surface of the oil fume pipe. The water tank comprises a water inlet and a water outlet. The interior of the water tank comprises a plurality of guide plates. The guide plates are arranged perpendicular to the axial direction of the oil fume pipe. Along the axial direction, the plurality of guide plates are arranged at intervals in the interior of the water tank. Cavities are formed between the guide plates and the shell of the water tank or between adjacent guide plates. Adjacent cavities are connected.

[0006] In this scheme, the waste heat recovery device is arranged around the circumferential surface of the oil fume pipe, and the inlet end of the oil fume pipe is connected to the smoke outlet of the range hood, so that the oil fume and water are subjected to heat exchange, avoiding heat loss in the pipeline. A plurality of cavities are formed in the water tank by arranging a plurality of guide plates in the interior of the water tank. Adjacent cavities are connected to each other, forming a plurality of cavities connected to each other. The flow path of water in the water tank is prolonged, the water flow speed is reduced, the water flow and the oil fume are subjected to sufficient heat exchange, the heat exchange efficiency is improved, and the waste heat recovery effect is improved. At the same time, the waste heat recovery device can be used as a decorative cover for the smoke exhaust pipeline of the range hood, simultaneously achieving waste heat recovery and beautification of the smoke exhaust pipeline.

[0007] Preferably, the water inlet and the water outlet are arranged at the two ends of the water tank along the axial direction, respectively.

[0008] In the present solution, by the above arrangement, the moving path of water in the water tank is increased, the water is guided inside the water tank, the heat exchange is fully realized, and the heat loss in the oil fume pipe is reduced.

[0009] Preferably, the water inlet is arranged at the top of the water tank along the smoke exhaust direction of the oil fume pipe, and the water outlet is arranged at the bottom of the water tank along the smoke exhaust direction.

[0010] In the present solution, the water inlet pipe is arranged at the top of the water tank, so that the water entering the water tank is guided to the water outlet at the bottom of the water tank by gravity, which not only prolongs the water flow path and enables the water to fully exchange heat in the water tank, but also enables the water to be guided from the water inlet to the water outlet without using other booster devices, thus being simple in structure and low in cost.

[0011] Preferably, along the smoke exhaust direction, the water inlet is arranged at a position not lower than the topmost guide plate in the water tank along the smoke exhaust direction, and / or the water outlet is arranged at a position not higher than the bottommost guide plate in the water tank along the smoke exhaust direction.

[0012] In the present solution, the water inlet is arranged at a position not lower than the topmost guide plate in the water tank, and / or the water outlet is arranged at a position not higher than the bottommost guide plate in the water tank, so that the water entering the water tank from the water inlet is guided to the water outlet through all the guide plates arranged inside the water tank, thereby enabling the water to fully exchange heat during the guiding process and avoiding the situation that the heat exchange efficiency is reduced due to insufficient guiding.

[0013] Preferably, along the direction perpendicular to the axial direction, the edges of the guide plates abut against the inner wall of the water tank and / or the outer wall of the oil fume pipe, and adjacent two guide plates are in communication with each other.

[0014] In the present solution, the edges of the guide plates abut against the inner wall of the water tank and / or the outer wall of the oil fume pipe, so that the guide plates are fixed inside the water tank, and there is no gap at the abutting position, no flow at the abutting position, and flow at the communicating position, so that the water flows along the designed path.

[0015] Preferably, the edges of the guide plates abut against the inner wall of the water tank and the outer wall of the oil fume pipe, and at least one guide hole is arranged on the guide plate.

[0016] In the present solution, at least one guide hole is arranged on the guide plate, so that the water is in communication with each other between adjacent guide plates, and the water can only flow through the guide hole due to the abutment of the guide plate against the inner wall of the water tank and the outer wall of the oil fume pipe, thereby effectively controlling the flow path and flow speed of the water and improving the heat exchange efficiency.

[0017] Preferably, the flow guide holes on two adjacent flow guide plates are not arranged at corresponding positions along the axial direction.

[0018] In this scheme, by the above setting, the water flow along the axial direction corresponding position of the flow guide hole from the previous flow guide plate directly to the next flow guide plate, and cause the water flow can not be effectively heat exchange, therefore, through the above setting to ensure that the water flow can be fully heat exchange.

[0019] Preferably, the flow guide holes on two adjacent flow guide plates are respectively located at the end of the two sides of the flow guide plate relative to the oil fume pipe.

[0020] In this scheme, by arranging the flow guide holes respectively at the end of the two sides of the flow guide plate relative to the oil fume pipe, the water enters the next chamber through the upper flow guide hole, and then reaches the lower flow guide hole after being guided, so that the water flow path in the water tank is lengthened, the flow rate is slowed down, and the heat exchange efficiency is improved by sufficient heat conduction.

[0021] Preferably, the waste heat recovery device further comprises an insulation layer, and the insulation layer is wrapped on the circumferential outer surface of the water tank.

[0022] In this scheme, by arranging the insulation layer on the circumferential surface of the water tank, the heat loss of the stored water after heat exchange in the water tank is reduced, and the user can get hot water from the water outlet during use.

[0023] The utility model provides a kind of range hood, and the range hood includes above waste heat recovery device.

[0024] In this scheme, the range hood forms a plurality of interconnected chambers by the above waste heat recovery device, lengthens the water flow path in the water tank, reduces the water flow rate, makes the water flow and oil fume fully heat exchange, improves the heat exchange efficiency, and thus improves the waste heat recovery effect. At the same time, the waste heat recovery device can be used as a decorative cover for the oil fume exhaust pipe, and simultaneously realize waste heat recovery and beautification of the exhaust pipe.

[0025] The significant advantages of this invention are as follows: By placing a water tank around the circumferential surface of the exhaust pipe connected to the range hood's exhaust outlet, heat exchange between the fumes and water is facilitated, preventing heat loss within the pipe. Multiple guide plates are installed inside the water tank, creating multiple interconnected chambers. This extends the water flow path within the tank, reduces the water flow velocity, and ensures thorough heat exchange between the water and the fumes, improving heat exchange efficiency and thus enhancing waste heat recovery. The water tank has an inlet and an outlet. When the water level is low, the inlet is opened, directing the water flow to the outlet. When hot water is needed, the outlet is opened, providing hot water to the user. Furthermore, this waste heat recovery device can also serve as a decorative cover for the range hood's exhaust pipe, achieving both waste heat recovery and aesthetic enhancement of the exhaust system. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the waste heat recovery device according to an embodiment of the present invention;

[0027] Figure 2 This is a cross-sectional view of the waste heat recovery device according to an embodiment of the present invention.

[0028] Explanation of reference numerals in the attached figures:

[0029] Oil fume pipe 1

[0030] Water tank 2

[0031] Inlet 3

[0032] Outlet 4

[0033] Deflector 5

[0034] Flow guide hole 6

[0035] Insulation layer 7 Detailed Implementation

[0036] The present invention will be described more clearly and completely below with reference to the accompanying drawings, using a preferred embodiment.

[0037] In this embodiment, as Figures 1-2 The diagram shows a waste heat recovery device for a range hood. The waste heat recovery device includes a water tank 2 and a fume duct 1. The inlet end of the fume duct 1 is connected to the exhaust port of the range hood. The water tank 2 is arranged around the circumferential surface of the fume duct 1. The water tank 2 includes an inlet 3 and an outlet 4. The interior of the water tank 2 includes multiple guide plates 5. The guide plates 5 are arranged along an axial direction perpendicular to the fume duct 1 and upward along the axial direction. The multiple guide plates 5 are spaced apart inside the water tank 2 so that a chamber is formed between the guide plates 5 and the outer shell of the water tank 2 or between two adjacent guide plates 5. The two adjacent chambers are connected.

[0038] The waste heat recovery device is characterized in that: the water tank 2 is arranged around the circumferential surface of the oil fume pipe 1, and the inlet end of the oil fume pipe 1 is communicated with the smoke outlet of the range hood, so that the oil fume exchanges heat with the water, avoiding heat loss in the pipeline. A plurality of guide plates 5 are arranged in the water tank 2, so that a plurality of chambers are formed in the water tank 2, and adjacent two chambers are communicated with each other, forming a plurality of chambers communicated with each other, prolonging the flow path of the water in the water tank 2, reducing the speed of the water flow, so that the water flow fully exchanges heat with the oil fume, improving the heat exchange efficiency. The water tank 2 is provided with a water inlet 3 and a water outlet 4, when the water amount in the water tank 2 is insufficient, the water inlet 3 is opened, so that the water flows to the water outlet 4 in the guide direction, when hot water is needed, the water outlet 4 is opened, and the hot water can be supplied to the user. At the same time, the waste heat recovery device can be used as a decorative cover of the smoke exhaust pipeline of the range hood, and the waste heat recovery and the beautification of the smoke exhaust pipeline are realized at the same time.

[0039] The water inlet 3 and the water outlet 4 are arranged at two ends of the water tank 2 along the axial direction. The water inlet 3 is arranged at the top of the water tank 2 along the smoke exhaust direction of the oil fume pipe 1, and the water outlet 4 is arranged at the bottom of the water tank 2 along the smoke exhaust direction. By increasing the moving path of the water in the water tank 2, the water is guided in the water tank 2 to fully realize heat exchange, and the heat loss in the oil fume pipe 1 is reduced. The water inlet pipe is arranged at the top of the water tank 2, so that after the water enters the water tank 2, the water is guided to the water outlet 4 at the bottom of the water tank 2 by the gravity, which not only prolongs the flow path of the water, but also enables the water to be guided from the water inlet 3 to the water outlet 4 without using other booster devices, so that the structure is simple and the cost is low. In other embodiments, the positions of the water inlet 3 and the water outlet 4 are not limited, and other components such as booster components can be matched, as long as the water can be guided from the water inlet 3 to the water outlet 4.

[0040] Further, along the smoke exhaust direction, the positions of the water inlet 3 and the water outlet 4 can have the following implementation manners: in the first manner, the water inlet 3 is arranged at a position not lower than the topmost guide plate 5 in the water tank 2 along the smoke exhaust direction; in the second manner, the water outlet 4 is arranged at a position not higher than the bottommost guide plate 5 in the water tank 2 along the smoke exhaust direction; in the third manner, the water inlet 3 is arranged at a position not lower than the topmost guide plate 5 in the water tank 2 along the smoke exhaust direction, and the water outlet 4 is arranged at a position not higher than the bottommost guide plate 5 in the water tank 2 along the smoke exhaust direction. The water inlet 3 is arranged at a position not lower than the topmost guide plate 5 in the water tank 2 along the smoke exhaust direction, and the water outlet 4 is arranged at a position not higher than the bottommost guide plate 5 in the water tank 2 along the smoke exhaust direction. After the water enters the water tank 2 from the water inlet 3, the water is guided to the water outlet 4 through all the guide plates 5 arranged in the water tank 2, so that the water is fully exchanged during the guiding process, avoiding the situation that the heat exchange efficiency is reduced due to insufficient guiding.

[0041] Along a direction perpendicular to the axial direction, the edge of the guide plate 5 can abut against the inner wall of the water tank 2, or against the outer wall of the fume duct 1, or simultaneously against both the inner wall of the water tank 2 and the outer wall of the fume duct 1. Adjacent guide plates 5 are interconnected. The guide plates 5 are fixed inside the water tank 2, with no gaps at the abutment points. Water does not flow at the abutment points but flows at the interconnected points, allowing the water to flow along the designed path.

[0042] Specifically, in this embodiment, as Figure 2 As shown, the four edges of the guide plate 5 abut against the inner wall of the water tank 2 and the outer wall of the fume duct 1, and a guide hole 6 is provided on the guide plate 5. By providing a guide hole 6 on the guide plate 5, water is ensured to be interconnected between adjacent guide plates 5. And because the guide plate 5 abuts against the inner wall of the water tank 2 and the outer wall of the fume duct 1, water can only flow through the guide hole 6, effectively controlling the water flow path and flow speed, and improving heat exchange efficiency. In other possible embodiments, other structures can be set to achieve the guiding effect, such as by setting the guide plate 5 at an angle and the joint between the guide plate and the inner wall of the water tank 2 to achieve guiding, etc., as long as the path and speed of the water flow are controlled, sufficient heat exchange can be achieved.

[0043] Furthermore, the guide holes 6 on two adjacent guide plates 5 are not located at corresponding positions along the axial direction. Instead, the guide holes 6 on two adjacent guide plates 5 are located at the ends of the guide plates 5 on both sides relative to the fume pipe 1. This arrangement prevents water from flowing directly from one guide plate 5 to the next along the axial direction through the corresponding guide holes 6, thus avoiding ineffective heat exchange. Therefore, this arrangement ensures that the water can be adequately heat-exchanged.

[0044] Furthermore, in this embodiment, the waste heat recovery device positions the guide holes 6 at the ends of the guide plate 5 on both sides relative to the fume pipe 1. This allows water to enter the next chamber through the upper guide hole 6, and then be guided to reach the lower guide hole 6. This extends the water flow path within the water tank 2, slows down the flow rate, and improves heat exchange efficiency through sufficient heat conduction. In other possible embodiments, the number and position of the guide holes 6 are not specifically limited, as long as they can meet the requirements of connecting adjacent chambers and controlling the water flow path.

[0045] In this embodiment, the waste heat recovery device further includes an insulation layer 7, which is wrapped around the circumferential outer surface of the water tank 2. By providing the insulation layer 7 to the circumferential surface of the water tank 2, the heat loss of the stored water after heat exchange has been completed is reduced, ensuring that the user can receive hot water from the outlet 4 during use. In other embodiments, the insulation layer 7 can also be placed inside the water tank 2 or other methods can be used to achieve the insulation effect.

[0046] This embodiment also provides a range hood that includes the aforementioned waste heat recovery device. Multiple interconnected chambers are formed within the water tank of the waste heat recovery device, extending the water flow path within the tank and reducing the water flow velocity. This allows for more thorough heat exchange between the water and the cooking fumes, improving heat exchange efficiency and thus enhancing waste heat recovery. Simultaneously, the waste heat recovery device can also serve as a decorative cover for the range hood's exhaust pipe, achieving both waste heat recovery and aesthetic enhancement of the exhaust pipe.

[0047] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A waste heat recovery device for a range hood, the waste heat recovery device comprising a water tank and a fume extraction pipe, the inlet end of the fume extraction pipe being connected to the exhaust port of the range hood, the water tank being arranged around the circumferential surface of the fume extraction pipe, the water tank comprising an inlet and an outlet, characterized in that, The water tank includes multiple guide plates, which are arranged along an axial direction perpendicular to the fume pipe. Along the axial direction, the multiple guide plates are spaced apart inside the water tank so that a cavity is formed between the guide plate and the outer shell of the water tank or between two adjacent guide plates, and the two adjacent cavities are connected.

2. The waste heat recovery device as described in claim 1, characterized in that, The inlet and outlet are respectively located at both ends of the water tank along the axial direction.

3. The waste heat recovery device as described in claim 2, characterized in that, The water inlet is located at the top of the water tank along the exhaust direction of the fume duct, and the water outlet is located at the bottom of the water tank along the exhaust direction.

4. The waste heat recovery device as described in claim 3, characterized in that, Along the exhaust direction, the water inlet is positioned no lower than the topmost guide plate in the water tank along the exhaust direction, and / or the water outlet is positioned no higher than the bottommost guide plate in the water tank along the exhaust direction.

5. The waste heat recovery device as described in claim 1, characterized in that, Along the axis perpendicular to the axis, the four edges of the guide plate abut against the inner wall of the water tank and / or the outer wall of the fume pipe, and two adjacent guide plates are interconnected.

6. The waste heat recovery device as described in claim 5, characterized in that, The four edges of the guide plate abut against the inner wall of the water tank and the outer wall of the fume pipe, and the guide plate is provided with at least one guide hole.

7. The waste heat recovery device as described in claim 6, characterized in that, The flow guide holes on two adjacent flow guide plates are not located at corresponding positions along the axial direction.

8. The waste heat recovery device as described in claim 6, characterized in that, The flow guide holes on two adjacent flow guide plates are respectively located at the ends of the flow guide plates on both sides of the fume pipe.

9. The waste heat recovery device as described in claim 1, characterized in that, The waste heat recovery device also includes an insulation layer, which is wrapped around the circumferential outer surface of the water tank.

10. A range hood, characterized in that, The range hood includes a waste heat recovery device as described in any one of claims 1-9.

Images