Heat recovery device and range hood heat recovery system

Abstract

The utility model relates to the technical field of kitchen appliances, in particular to a heat recovery device and a range hood heat recovery system. The heat recovery device and the range hood heat recovery system comprise a first shell, a second shell and a heat exchange mechanism, the second shell is arranged above the first shell, the heat exchange mechanism extends from the interior of the first shell to the interior of the second shell, the heat exchange mechanism is provided with a first end and a second end, the first end and a bottom plate of the first shell are arranged in a spaced mode, and the second end is arranged above the first shell. And the second end and the upper end plate of the second shell are arranged at an interval. And through the arrangement of the gap, the heat exchange efficiency and the heat exchange effect of the heat exchange mechanism can be improved, and the heat recycling efficiency of the heat exchange mechanism can also be improved. In addition, the gaps can reduce the flowing speed of the smoke or the gas, the smoke or the gas forms backflow and turbulent flow, the heat exchange time of the smoke or the gas and the heat exchange mechanism is prolonged, heat exchange is more thorough, and the heat exchange efficiency, the heat exchange effect and the heat recycling efficiency of the heat exchange mechanism are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen appliances, in particular to a heat recovery device and a range hood heat recovery system. Background Art

[0002] The existing range hood heat recovery system includes a range hood, a ventilation system and a heat recovery device. The heat recovery device includes a first shell, a second shell and a heat exchange mechanism. The second shell is arranged above the first shell. The first shell is connected to the range hood, and the second shell is connected to the ventilation system. The heat exchange mechanism extends from the inside of the first shell to the inside of the second shell. The heat exchange mechanism can transfer the heat of the smoke in the range hood to the second shell, and the heat in the second shell is transferred to the gas in the ventilation system, thereby realizing the heating of the gas in the ventilation system, thereby realizing the recovery and secondary utilization of the heat of the smoke.

[0003] However, one end of the existing heat exchange mechanism abuts against the top plate of the second shell, and the other end of the heat exchange mechanism abuts against the bottom plate of the first shell. However, the heat exchange effect of the heat exchange mechanism of this structure is slightly poor and the heat recovery efficiency is low.

[0004] Therefore, it is urgent to design a new heat recovery device and a range hood heat recovery system to improve the problems of poor heat exchange effect of the heat exchange mechanism and low heat recovery efficiency. Utility Model Content

[0005] According to one aspect of the utility model, a heat recovery device is provided to improve the heat exchange effect and heat recovery utilization rate of the heat recovery device.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A heat recovery device comprises a first shell capable of being connected to a range hood and a second shell capable of being connected to a ventilation system, wherein the second shell is arranged above the first shell, and the heat recovery device further comprises:

[0008] A heat exchange mechanism extends from the interior of the first shell to the interior of the second shell, and the heat exchange mechanism has a first end and a second end; the first end is spaced apart from the bottom plate of the first shell, and / or the second end is spaced apart from the upper end plate of the second shell.

[0009] As an optional solution, the maximum distance between the first end and the top plate of the first shell in the up-down direction is a first distance h1, and the height of the first shell in the up-down direction is a first height H1, wherein h1 / H1 is 0.6-0.9.

[0010] As an optional solution, the maximum distance between the second end and the lower end plate of the second shell in the up-down direction is a second distance h2, and the height of the second shell in the up-down direction is a second height H2, wherein h2 / H2 is 0.6-0.9.

[0011] As an optional solution, the first shell has an air inlet, and the smoke at the air inlet can flow along a first direction. The heat exchange mechanism includes a windward surface and a leeward surface, and the smoke flows through the windward surface and the leeward surface in sequence. The heat exchange mechanism can rotate relative to the first shell to adjust the inclination angle α of the windward surface relative to the first direction.

[0012] As an optional solution, the heat exchange mechanism includes a heat exchange body and a plurality of first heat exchange fins arranged thereon, at least a portion of the heat exchange body is arranged inside the second shell, the heat exchange body is rotatably connected to the first shell and / or the second shell, and the first heat exchange fins are located inside the first shell.

[0013] As an optional scheme, multiple first heat exchange fins constitute at least two groups of first heat exchange fin groups arranged along a first preset direction, each group of the first heat exchange fin groups includes at least two first heat exchange fins arranged at intervals along a second preset direction, and the first heat exchange fins of two adjacent groups of the first heat exchange fin groups are arranged alternately.

[0014] As an optional solution, a guide plate and a recovery mechanism disposed downstream of the guide plate are disposed in the first shell, and the guide plate is disposed below the first end at intervals.

[0015] As an optional solution, the first shell has an air inlet, and the smoke at the air inlet can flow along a first direction, and the guide plate is inclined downward along the first direction.

[0016] As an optional solution, the heat exchange mechanism is made of heat conductive material.

[0017] As an optional solution, the heat recovery device further includes a smoke concentration detection mechanism, which is located upstream of the heat exchange mechanism and is used to detect the concentration of the smoke upstream of the heat exchange mechanism.

[0018] As an optional solution, the heat recovery device also includes a first detection mechanism and a second detection mechanism, the first detection mechanism is arranged upstream of the heat exchange mechanism, and the second detection mechanism is located downstream of the heat exchange mechanism, and both the first detection mechanism and the second detection mechanism can detect the flow rate of the flue gas and the temperature of the flue gas.

[0019] As an optional solution, the heat recovery device further includes a temperature detection mechanism, and the temperature detection mechanism is used to detect the outdoor temperature.

[0020] As an optional solution, the heat recovery device further includes a heat conducting mechanism, which is disposed between the first shell and the second shell, and is connected to the first shell and the second shell respectively.

[0021] As an optional solution, the heat recovery device further includes a buffer mechanism, and the buffer mechanism is arranged between the first shell and the second shell.

[0022] According to another aspect of the utility model, a range hood heat recovery system is provided to improve the heat exchange effect and heat recovery utilization rate of the heat recovery device.

[0023] To achieve this purpose, the utility model adopts the following technical solutions:

[0024] A range hood heat recovery system comprises a range hood and a ventilation system. The range hood heat recovery system further comprises the heat recovery device as described above. The first shell is connected to the range hood, and the second shell is connected to the ventilation system.

[0025] Beneficial effects of the utility model:

[0026] The heat recovery device and range hood heat recovery system provided by the utility model include a first shell, a second shell and a heat exchange mechanism, the second shell is arranged above the first shell, the heat exchange mechanism extends from the inside of the first shell to the inside of the second shell, the heat exchange mechanism has a first end and a second end, the first end is spaced apart from the bottom plate of the first shell, and the second end is spaced apart from the upper end plate of the second shell. By setting the gap, the heat exchange efficiency and heat exchange effect of the heat exchange mechanism can be improved, and the heat recovery utilization rate of the heat recovery device can also be improved. In addition, the gap can reduce the flow speed of the smoke or gas, the smoke or gas forms backflow and turbulence, and the heat exchange time between the smoke or gas and the heat exchange mechanism is increased, so that the heat exchange is more thorough, and the heat exchange efficiency, heat exchange effect and heat recovery utilization rate are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of a range hood heat recovery system provided by an embodiment of the utility model;

[0028] Figure 2 It is a structural schematic diagram of a heat recovery device provided by an embodiment of the utility model;

[0029] Figure 3 It is a structural schematic diagram of a heat recovery device provided by an embodiment of the utility model in a first state;

[0030] Figure 4 It is a structural schematic diagram of the heat recovery device provided by the embodiment of the utility model in the second state;

[0031] Figure 5 It is a structural schematic diagram of the heat recovery device provided by the embodiment of the utility model in the third state;

[0032] Figure 6 It is a cross-sectional view of a heat recovery device provided in an embodiment of the utility model.

[0033] In the figure:

[0034] 100. Range hood heat recovery system;

[0035] 10. heat recovery device; 11. first heat exchange device; 111. first shell; 1111. first cavity; 1112. shell body; 11121. air inlet; 11122. top plate; 111221. first accommodating hole; 11123. bottom plate; 1113. movable plate; 112. guide plate; 113. recovery mechanism; 114. locking mechanism; 12. second heat exchange device; 121. second shell; 1211. second cavity; 12111. second gap; 1213. upper end plate; 121 4. lower end plate; 12141. second accommodating hole; 13. heat exchange mechanism; 131. heat exchange body; 1311. rotating shaft; 132. first heat exchange fin; 1321. first end; 133. windward side; 134. leeward side; 136. second heat exchange fin; 1361. second end; 14. heat conduction mechanism; 15. buffer mechanism; 16. smoke concentration detection mechanism; 17. first detection mechanism; 18. second detection mechanism; 191. temperature detection mechanism; 192. first fan; 193. first gap;

[0036] 20. Smoke generating device; 21. Cooking appliance; 22. Range hood; 221. Range hood body; 222. Smoke collecting chamber; 223. Exhaust duct;

[0037] 30. Ventilation system; 31. Air intake duct; 32. Second fan. DETAILED DESCRIPTION

[0038] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and implementation methods. It is understood that the specific embodiments described herein are only used to explain the utility model, rather than to limit the utility model. It should also be noted that, for the convenience of description, only the parts related to the utility model are shown in the accompanying drawings, rather than all.

[0039] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0041] In the description of the embodiments of the present disclosure, the terms "upper", "lower", "left", "right", etc., and the like, are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0042] like Figure 1 As shown, the embodiment of the present disclosure discloses a range hood heat recovery system 100, which includes a smoke generating device 20, a ventilation system 30 and a heat recovery device 10, wherein the smoke generating device 20 is mainly responsible for generating and collecting smoke, and the ventilation system 30 is mainly responsible for ventilating the gas in the room. The smoke generating device 20 includes a range hood 22, and the range hood 22 is connected to the ventilation system 30 through the heat recovery device 10. The heat recovery device 10 can recover the heat of the smoke generated by the smoke generating device 20, and the heat recovery device 10 can transfer the recovered heat to the gas of the ventilation system 30, thereby heating the gas exchanged into the room. Through the provision of the heat recovery device 10, the secondary utilization of the heat of the smoke can be achieved, and the heat recovery device 10 is used to preheat the gas exchanged into the room, thereby reducing the demand and utilization of electric energy for heating the gas exchanged into the room, thereby achieving the purpose of energy saving.

[0043] Combination Figure 1The structure of the smoke generating device 20 is described as follows. Figure 1 As shown, the smoke generating device 20 also includes a stove 21, which is used to cook food. A range hood 22 is arranged above the stove 21, and the range hood 22 can recover and discharge the smoke generated by the stove 21 during cooking. Figure 1 As shown, the range hood 22 includes a smoke collecting chamber 222, a range hood body 221 and an exhaust duct 223 which are connected in sequence. The smoke collecting chamber 222 can gather the smoke well, and the smoke can be filtered after passing through the smoke collecting chamber 222, the range hood body 221 and the exhaust duct 223 in sequence, and the filtered gas is discharged to a public flue or outdoors.

[0044] Combination Figure 1 The structure of the ventilation system 30 is described as follows. Figure 1 As shown, the ventilation system 30 includes an air intake duct 31 and a second fan 32. One end of the air intake duct 31 is connected to the indoor environment, and the other end of the air intake duct 31 is connected to the outdoor environment. The second fan 32 is arranged in the air intake duct 31. When the second fan 32 is working, the gas in the outdoor environment can be introduced into the house. Exemplarily, the ventilation system 30 can be a fresh air system, an air conditioning system, etc. All systems that can realize indoor and outdoor gas exchange are within the protection scope of the embodiments of the present disclosure.

[0045] Combination Figure 1 and Figure 2 The structure of the heat recovery device 10 is described as follows. Figure 1 and Figure 2 As shown, the heat recovery device 10 includes a first heat exchange device 11 and a second heat exchange device 12. The first heat exchange device 11 includes a first shell 111 with a first cavity 1111. The first shell 111 has an air inlet 11121. The air inlet 11121 is connected to the exhaust pipe 223. The second heat exchange device 12 includes a second shell 121 with a second cavity 1211. The second shell 121 is connected to the air intake pipe 31. The second shell 121 and the first shell 111 are arranged in the up and down direction. The second shell 121 is located above the first shell 111, and the first shell 111 is directly or indirectly connected to the second shell 121. The flue gas is a thermal fluid. The thermal fluid spontaneously forms an upward movement due to the action of thermal buoyancy during movement, resulting in the flue gas entering the first cavity 1111. After moving upward, it will then adhere to the upper wall of the first shell 111 for heat transfer, and the heat is transferred from the lower wall of the second shell 121 to the second cavity 1211.

[0046] like Figure 1 and Figure 2As shown, the heat recovery device 10 also includes a heat exchange mechanism 13, which extends from the inside of the first shell 111 to the inside of the second shell 121. The hot fluid that touches the upper wall of the first shell 111 moves downward close to the heat exchange mechanism 13 due to the wall effect. In the process of the flue gas close to the wall of the heat exchange mechanism 13, the flue gas and the wall of the heat exchange mechanism 13 have both heat convection effect and heat conduction effect, which can enhance the heat exchange effect and heat exchange mode. The heat of the hot fluid is exchanged with the second cavity 1211 through the heat exchange mechanism 13. Through the setting of the heat exchange mechanism 13, the heat exchange area can be increased, and the heat exchange between the first cavity 1111 and the second cavity 1211 can be improved. The gas in the intake pipe 31 enters the second cavity 1211 and exchanges heat with the heat exchange mechanism 13, thereby heating the gas in the ventilation system 30, thereby realizing the utilization of the recovered heat.

[0047] However, one end of the existing heat exchange mechanism 13 abuts against the top plate of the second shell 121, and the other end of the heat exchange mechanism 13 abuts against the bottom plate of the first shell 111. However, the heat exchange effect of the heat exchange mechanism 13 of this structure is slightly poor and the heat recovery efficiency is low.

[0048] In order to solve the above problems, Figure 2 As shown, the heat exchange mechanism 13 has a first end 1321 and a second end 1361, the first shell 111 includes a bottom plate 11123, the first end 1321 and the bottom plate 11123 are spaced apart, and a first gap 193 is formed between the first end 1321 and the bottom plate 11123. Through the setting of the first gap 193, the flue gas in the first cavity 1111 can also exchange heat through the first end 1321 of the heat exchange mechanism 13, further improving the heat exchange efficiency of the heat exchange mechanism 13 and strengthening the heat exchange effect of the heat exchange mechanism 13. In addition, Figure 2 As shown, a mixing space N is formed at the position of the first gap 193. The formation of the mixing space N can reduce the flow velocity of the flue gas in the first cavity 1111 to a certain extent. The flue gas forms backflow and turbulence in the upstream space of the heat exchange mechanism 13. The flue gas stays in the upstream space of the heat exchange mechanism 13 (the rear side of the heat exchange mechanism 13) for a longer time, thereby increasing the heat exchange time between the flue gas and the heat exchange mechanism 13, making the heat exchange more thorough, improving the heat exchange efficiency, strengthening the heat exchange effect, and improving the heat recovery utilization rate of the heat recovery device 10.

[0049] like Figure 2As shown, the second shell 121 includes an upper end plate 1213, and the second end 1361 is spaced apart from the upper end plate 1213, and a second gap 12111 is formed between the second end 1361 and the upper end plate 1213. Through the setting of the second gap 12111, the heat on the heat exchange mechanism 13 can also be exchanged with the gas in the second cavity 1211 through the second end 1361, thereby further improving the heat exchange efficiency and enhancing the heat exchange effect. Figure 2 As shown, a mixing space P is formed at the position of the second gap 12111. The formation of the mixing space P can reduce the flow velocity of the gas in the second cavity 1211 to a certain extent. The gas forms backflow and turbulence in the space upstream of the heat exchange mechanism 13 (the front side of the heat exchange mechanism 13). The gas stays in the upstream space of the heat exchange mechanism 13 for a longer time, thereby increasing the heat exchange time between the gas and the heat exchange mechanism 13, making the heat exchange more thorough, thereby improving the heat exchange efficiency of the heat recovery device 10, strengthening the heat exchange effect of the heat recovery device 10, and improving the heat recovery utilization rate of the heat recovery device 10.

[0050] like Figure 2 As shown, the first shell 111 includes a top plate 11122, the maximum distance between the first end 1321 and the top plate 11122 in the vertical direction is a first distance h1, and the height of the first shell 111 in the vertical direction is a first height H1, wherein h1 / H1 is 0.6-0.9, which can achieve the longest heat exchange time between the flue gas and the heat exchange mechanism 13, so that the heat exchange is the most thorough, and the best heat exchange efficiency and the best heat exchange effect are achieved. Exemplarily, h1 / H1 can be 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, etc.

[0051] like Figure 2 As shown, the second shell 121 includes a lower end plate 1214, the maximum distance between the second end 1361 and the lower end plate 1214 in the vertical direction is a second distance h2, and the height of the second shell 121 in the vertical direction is a second height H2, wherein h2 / H2 is 0.6-0.9, which can achieve the longest heat exchange time between the gas and the heat exchange mechanism 13, so that the heat exchange is the most thorough, and the best heat exchange efficiency and the best heat exchange effect are achieved. Exemplarily, h2 / H2 can be 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, etc.

[0052] In addition, the existing heat exchange mechanism 13 is fixed relative to the first shell 111 and the second shell 121, resulting in poor coordination between the oil fume absorption effect and heat recovery of the range hood heat recovery system 100, resulting in poor oil fume absorption effect of the smoke generating device 20, or resulting in poor heat recovery rate of the heat exchange mechanism 13, which cannot meet the user's adaptive adjustment requirements for different scenarios, thereby reducing the user's usage experience.

[0053] To solve the above problems, Figure 1 and Figure 2 As shown, the heat exchange mechanism 13 includes a windward surface 133 and a leeward surface 134, and the smoke flows through the windward surface 133 and the leeward surface 134 in sequence. The heat exchange mechanism 13 can rotate relative to the first shell 111 to adjust the inclination angle α of the windward surface 133 relative to the front-rear direction (first direction). Figure 3 As shown, when the inclination angle α is the first inclination angle α1, the first inclination angle α1 is relatively small (an acute angle). In this state, the upstream space of the heat exchange mechanism 13 is relatively small. Under the obstruction of the heat exchange mechanism 13, the flue gas entering from the air inlet 11121 forms backflow and turbulence in the upstream space of the heat exchange mechanism 13, and the flue gas flow rate is reduced, resulting in the flue gas staying longer in the upstream space of the heat exchange mechanism 13, thereby increasing the heat exchange time between the flue gas and the heat exchange mechanism 13, making the heat exchange more thorough, improving the heat exchange efficiency, and strengthening the heat exchange effect. However, in this state, the resistance of the flue gas is slightly larger, which improves the heat exchange effect, but the fume absorbing effect of the range hood 22 is relatively weak. Figure 4 As shown, when the inclination angle α is the second inclination angle α2, the size of the second inclination angle α2 is relatively large (it is an obtuse angle). In this state, the heat exchange mechanism 13 has a smaller blocking effect on the smoke, and can achieve a better smoke absorption effect of the range hood 22. The heat exchange effect of the heat exchange mechanism 13 is moderate.

[0054] like Figure 3 As shown, when the concentration of flue gas is low, the main task at this time is to increase the heat exchange intensity of the heat exchange mechanism 13 and enhance the heat recovery efficiency, reduce the inclination angle α, adjust the inclination angle α to the first inclination angle α1, increase the forced convection area, increase the heat recovery rate, improve the heat exchange efficiency, and enhance the heat exchange effect. Figure 4 As shown, when the concentration of the flue gas is high, the main task at this time is to increase the air volume of the range hood 22, increase the inclination angle α, adjust the inclination angle α to the second inclination angle α2, reduce the flow resistance of the flue gas, and ensure that the range hood 22 has a better absorption effect on the flue gas, and ensure that the heat exchange mechanism 13 performs appropriate heat recovery under the premise of sufficient air volume of the range hood 22.

[0055] In summary, the heat recovery device 10 and the range hood heat recovery system 100 can adaptively and dynamically adjust the inclination angle α according to the needs of different usage scenarios, and adaptively and dynamically adjust the relationship between the oil fume absorption effect and heat recovery, so as to achieve heat recovery and utilization while meeting the user's needs for different scenarios and improving the user's usage experience.

[0056] In an optional embodiment, if Figure 1 to Figure 5As shown, the heat exchange mechanism 13 includes a heat exchange body 131 and a plurality of first heat exchange fins 132 arranged thereon, at least part of the heat exchange body 131 is arranged inside the second shell 121, the heat exchange body 131 is rotatably connected to the first shell 111 and / or the second shell 121, and the first heat exchange fins 132 are located inside the first shell 111. Through the arrangement of the plurality of first heat exchange fins 132, the heat exchange area can be increased, the heat exchange efficiency can be improved, the flue gas movement path can be increased, the flue gas activity can be reduced, the oil in the flue gas can be better precipitated in the heat exchange mechanism 13, the grease content in the exhaust flue gas can be reduced, and the pollution of the exhaust flue gas to the outdoor air can be reduced.

[0057] For example, Figure 6 As shown, the cross section of the first heat exchange fin 132 may be circular, and the circular cross section is provided to facilitate the rapid processing of the first heat exchange fin 132. In other optional embodiments, the cross section of the first heat exchange fin 132 may also be square, diamond or other shapes, and all such shapes are within the protection scope of the embodiments of the present disclosure.

[0058] In an optional embodiment, the heat exchange body 131 and the first heat exchange fins 132 can be made of copper material, silver material or other solid materials that are conducive to heat conduction. The aforementioned materials have good thermal conductivity to enhance the heat exchange between the flue gas in the first cavity 1111 and the gas in the second cavity 1211 and the heat exchange body 131, respectively, to improve the heat exchange efficiency.

[0059] In addition, if Figure 1 to Figure 5 As shown, the heat exchange mechanism 13 further includes a plurality of second heat exchange fins 136, which are arranged on the heat exchange body 131 and are located inside the second shell 121. By providing a plurality of second heat exchange fins 136, the gas movement path can be increased, the heat exchange area can be increased, and the heat exchange efficiency can be improved.

[0060] Exemplarily, the cross section of the second heat exchange fin 136 may be circular, and the circular cross section is provided to facilitate the rapid processing of the second heat exchange fin 136. In other optional embodiments, the cross section of the second heat exchange fin 136 may also be square, diamond or other shapes, and all such shapes are within the protection scope of the embodiments of the present disclosure.

[0061] In an optional embodiment, the second heat exchange fins 136 can be made of copper material, silver material or other solid materials that are conducive to heat conduction. The aforementioned materials have good thermal conductivity to enhance the heat exchange between the gas in the second cavity 1211 and the heat exchange mechanism 13, thereby improving the heat exchange efficiency.

[0062] In an optional embodiment, the heat exchange body 131 , the second heat exchange fins 136 , and the first heat exchange fins 132 may be integrally injection molded, which can achieve rapid processing and manufacturing of the heat exchange mechanism 13 .

[0063] In an optional embodiment, the heat exchange body 131 and the first heat exchange fins 132 can also be detachably connected, so that the damaged heat exchange body 131 or the first heat exchange fins 132 can be replaced independently, thereby reducing maintenance costs. Exemplarily, the heat exchange body 131 and the first heat exchange fins 132 can be detachably connected by screws, pins, buckle assemblies, etc.

[0064] In an optional embodiment, the heat exchange body 131 and the second heat exchange fins 136 can also be detachably connected, so that the damaged heat exchange body 131 or the second heat exchange fins 136 can be replaced independently, thereby reducing maintenance costs. Exemplarily, the heat exchange body 131 and the second heat exchange fins 136 can be detachably connected by screws, pins, buckle assemblies, etc.

[0065] Specifically, if Figure 1 to Figure 5 As shown, the heat exchange mechanism 13 also includes a driving motor (not shown in the figure), and the heat exchange body 131 includes a rotating shaft 1311, which is rotatably connected to the first shell 111 and / or the second shell 121, and the output end of the driving motor is fixedly connected to the rotating shaft 1311. When the driving motor is working, the driving motor can drive the rotating shaft 1311 to rotate relative to the first shell 111 and the second shell 121. It should be noted that the extension direction of the rotating shaft 1311 is perpendicular to the front-rear direction and the extension direction of the first heat exchange fin 132.

[0066] In an optional embodiment, if Figure 2 As shown, the heat exchange body 131 is roughly cylindrical, the top plate 11122 of the first shell 111 is provided with a first accommodating hole 111221, and the lower end plate 1214 of the second shell 121 is provided with a second accommodating hole 12141. When the cylindrical heat exchange body 131 is respectively accommodated in the first accommodating hole 111221 and the second accommodating hole 12141, the contours of the first accommodating hole 111221 and the second accommodating hole 12141 are both in contact with the end face and the circumferential surface of the cylindrical heat exchange body 131. That is to say, through the arrangement of the above structure, it is possible to ensure that the heat exchange body 131 rotates smoothly while realizing the sealing arrangement between the first cavity 1111 and the second cavity 1211, so as to prevent the smoke in the first cavity 1111 from entering the second cavity 1211, and to prevent the ventilation system 30 from exchanging the smoke into the room, thereby ensuring the better ventilation function of the ventilation system 30.

[0067] In an optional embodiment, a sealing structure (not shown in the figure) may be provided between the first accommodating hole 111221 and the heat exchange body 131, and a sealing structure (not shown in the figure) may be provided between the second accommodating hole 12141 and the heat exchange body 131. The setting of the sealing structure can further prevent the smoke in the first cavity 1111 from entering the second cavity 1211.

[0068] Exemplarily, the sealing structure can be a sealing ring, which includes a first sealing ring and a second sealing ring. The first sealing ring is arranged around the first accommodating hole 111221, and the second sealing ring is arranged around the second accommodating hole 12141. The first sealing ring and the second sealing ring can respectively abut against the end face and the outer peripheral surface of the heat exchange body 131.

[0069] Exemplarily, the sealing structure may be made of materials such as rubber and silicone, which can also prevent the sealing structure from causing damage to the heat exchange body 131 .

[0070] In an optional embodiment, the sealing structure can also be a sealing layer arranged on the end face and the outer peripheral surface of the heat exchange body 131, and the sealing layer abuts against the first accommodating hole 111221 and the second accommodating hole 12141 respectively, and can also achieve a better sealing effect between the first cavity 1111 and the second cavity 1211.

[0071] In an optional embodiment, if Figure 6 As shown, the plurality of first heat exchange fins 132 constitute at least two groups of first heat exchange fin groups arranged along a first preset direction. When the heat recovery device 10 is in a state as shown in FIG. Figure 5 In the third state shown, the first preset direction coincides with the front-to-back direction, and each group of first heat exchange fins includes at least two first heat exchange fins 132 arranged at intervals along the left-right direction (second preset direction). The first heat exchange fins 132 of two adjacent groups of first heat exchange fins are arranged in an alternating manner. More first heat exchange fins 132 can be arranged in a limited space, and multiple first heat exchange fins 132 are arranged compactly in a limited space. Multiple first heat exchange fins 132 can achieve a better heat exchange effect. In addition, a better precipitation effect of grease in the flue gas can be achieved. Of course, the number of first heat exchange fins 132 can also be one or two, and the arrangement of multiple first heat exchange fins 132 is not limited to the aforementioned arrangement. All numbers and arrangements of first heat exchange fins 132 are within the protection scope of this optional embodiment.

[0072] In an optional embodiment, the plurality of second heat exchange fins 136 constitute at least two groups of second heat exchange fin groups arranged along the first preset direction. Figure 5In the third state shown, the first preset direction coincides with the front-to-back direction, and each group of second heat exchange fins includes at least two second heat exchange fins 136 arranged at intervals along the left-right direction (second preset direction). The second heat exchange fins 136 of two adjacent groups of second heat exchange fins are arranged in an alternating manner. More second heat exchange fins 136 can be arranged in a limited space, and multiple second heat exchange fins 136 are arranged compactly in a limited space. Multiple second heat exchange fins 136 can achieve a better heat exchange effect. In addition, a better precipitation effect of grease in the flue gas can be achieved. Of course, the number of second heat exchange fins 136 can also be one or two, and the arrangement of multiple second heat exchange fins 136 is not limited to the aforementioned arrangement. All numbers and arrangements of second heat exchange fins 136 are within the protection scope of this optional embodiment.

[0073] In an optional embodiment, if Figure 1 As shown, the heat recovery device 10 also includes a smoke concentration detection mechanism 16 and a controller, the controller is electrically connected to the smoke concentration detection mechanism 16 and the drive motor respectively, the smoke concentration detection mechanism 16 is located upstream of the heat exchange mechanism 13, and the smoke concentration detection mechanism 16 is used to obtain the smoke concentration detection value C upstream of the heat exchange mechanism 13 检 The controller is set with a preset smoke concentration value C0. The controller will detect the smoke concentration value C 检 Compare with the preset value C0 of smoke concentration: if C 检 >C0, according to the actual resistance value f of the heat exchange mechanism 13 实际 , the controller controls the driving motor to adjust the inclination angle α of the heat exchange mechanism 13; that is, if C 检 >C0, the main task at this time is to increase the air volume of the range hood 22. The adjustment of the heat exchange mechanism 13 is mainly to meet the air volume of the range hood 22. According to the actual resistance value f of the heat exchange mechanism 13 实际 To adjust the drive motor to better meet the needs of the current scenario.

[0074] If C 检 ≤C0, according to the actual heat exchange capacity Q of the heat exchange mechanism 13 实际 , the controller controls the driving motor to adjust the adjustment inclination angle α of the heat exchange mechanism 13. That is, if C 检 ≤C0, the main task at this time is to increase the heat exchange intensity and heat recovery efficiency of the heat exchange mechanism 13, according to the actual heat exchange amount Q of the heat exchange mechanism 13 实际 To adjust the drive motor to better meet the needs of the current scenario.

[0075] In an optional embodiment, if Figure 1As shown, the heat recovery device 10 also includes a first detection mechanism 17 and a second detection mechanism 18, the first detection mechanism 17 and the second detection mechanism 18 are electrically connected to the controller respectively, the first detection mechanism 17 is arranged upstream of the heat exchange mechanism 13, and the second detection mechanism 18 is arranged downstream of the heat exchange mechanism 13, and the first detection mechanism 17 and the second detection mechanism 18 are both capable of detecting the flow rate and temperature of the flue gas. Among them, the first detection mechanism 17 can obtain the first temperature T1 upstream of the heat exchange mechanism 13, and the second detection mechanism 18 can obtain the second temperature T2 downstream of the heat exchange mechanism 13. The controller can calculate the actual heat exchange amount Q according to the first temperature T1 and the second temperature T2. 实际 Through the above method, a more accurate actual heat transfer Q can be obtained 实际 Specifically, the actual heat transfer capacity Q 实际 The calculation formula is as follows:

[0076] Q 实际 = k*A*(T1-T2);

[0077] Wherein, k is the heat transfer coefficient, which is mainly determined by the physical properties of the current air. k can be set by the installer during the initial installation; k can also be set by the subsequent user during use; in addition, the heat recovery device 10 also includes an air physical property detection device electrically connected to the controller, and the controller stores a comparison table or formula between the parameters detected by the air physical property detection device and k. The controller can subsequently adaptively adjust the value of k according to the actual parameters detected by the air physical property detection device in the environment at that time, so that the calculated Q 实际 More accurate, achieving actual heat exchange Q 实际 Dynamic adjustment of the calculation formula.

[0078] Wherein, A is the heat exchange area, and A and α are tested before the heat recovery device 10 leaves the factory to form a comparison table, which is stored in the controller for easy retrieval of subsequent calculations by the controller. Of course, the relationship between A and α can also be formed into a relevant formula through simulation and fitting, and the corresponding formula is stored in the controller.

[0079] Exemplarily, the first detection mechanism 17 and the second detection mechanism 18 can respectively include a temperature monitoring device, which can be an infrared temperature monitoring device, a thermocouple temperature monitoring device, a thermistor temperature monitoring device, a liquid crystal temperature monitoring device, etc. All temperature monitoring devices that can realize temperature detection are within the protection scope of this optional embodiment.

[0080] In an optional embodiment, according to the actual heat exchange capacity Q of the heat exchange mechanism 13 实际 The controller controls the driving motor to adjust the tilt angle α of the heat exchange mechanism 13. Specifically, the controller stores the preset heat exchange amount Q预设 , the controller calculates the actual heat transfer Q 实际 With the preset heat transfer Q 预设 For comparison: If Q 实际 ≤Q 预设 , the controller controls the driving motor to adjust the inclination angle α of the heat exchange mechanism 13 to decrease, and the controller continuously obtains the first temperature T1 upstream of the heat exchange mechanism 13 and the second temperature T2 downstream of the heat exchange mechanism 13; if Q 实际 >Q 预设 , the controller stops adjusting the drive motor, and the tilt angle α is adjusted, thereby completing the dynamic and precise adjustment of the tilt angle α.

[0081] The first detection mechanism 17 can obtain the first speed u1 upstream of the heat exchange mechanism 13, and the second detection mechanism 18 can obtain the second speed u2 downstream of the heat exchange mechanism 13. The controller can calculate the pressure loss based on the first speed and the second speed, and then calculate the actual resistance value f of the heat exchange mechanism 13 to the heat recovery device 10. 实际 Specifically, the actual resistance value f 实际 The calculation formula is as follows:

[0082]

[0083] Among them, β is the drag coefficient; g is the acceleration due to gravity.

[0084] Exemplarily, the first detection mechanism 17 and the second detection mechanism 18 may respectively include a gas flow rate detection mechanism, which may be a thermal gas flow meter, a pressure differential gas flow meter, a vortex gas flow meter, an annular differential gas flow meter, etc. All gas flow rate detection mechanisms that can realize flue gas flow rate detection are within the protection scope of this optional embodiment.

[0085] In an optional embodiment, according to the actual resistance value f of the heat exchange mechanism 13 实际 The controller controls the driving motor to adjust the inclination angle α of the heat exchange mechanism 13. Specifically, the controller stores a preset resistance value f 预设 ; The controller calculates the actual resistance value f 实际 ; The controller converts the actual resistance value f 实际 With the preset resistance value f 预设 For comparison: If f 实际 ≥f 预设 The controller controls the driving motor to drive the heat exchange mechanism 13 to adjust the tilt angle α to increase, and the controller continuously obtains the actual resistance value f 实际 If f 实际 <f 预设, the controller stops adjusting the drive motor, and the tilt angle α is adjusted, thereby completing the dynamic and precise adjustment of the tilt angle α.

[0086] In summary, the first detection mechanism 17 includes a first temperature monitoring device and a first gas flow rate detection mechanism, and the first temperature monitoring device and the first gas flow rate detection mechanism are integrated into one. The second detection mechanism 18 includes a second temperature monitoring device and a second gas flow rate detection mechanism, and the second temperature monitoring device and the second gas flow rate detection mechanism are integrated into one.

[0087] An optional embodiment, such as Figure 1 As shown, the heat recovery device 10 also includes a temperature detection mechanism 191. The temperature detection mechanism 191 and the second fan 32 are both electrically connected to the controller. The temperature detection mechanism 191 is used to detect the outdoor temperature. 预设 The controller obtains the outdoor temperature T through the temperature detection mechanism 191 室外 , the controller will T 室外 With T 预设 For comparison: If T 室外 ≤T 预设 At this time, the gas temperature in the ventilation system 30 is low, and the heat exchange mechanism 13 is needed to heat the gas in the ventilation system 30 to ensure a good body feeling for indoor users. The controller starts the heat exchange mechanism 13 and the second fan 32, and performs subsequent smoke concentration detection value C 检 judgment; if T 室外 >T 预设 At this time, the gas temperature in the ventilation system 30 is relatively high, and the inclination angle α is adjusted to the maximum to increase the air volume of the range hood 22 to ensure that the smoke generated by the stove 21 is sucked away.

[0088] In an optional embodiment, if Figure 1 to Figure 5 As shown, a guide plate 112 and a recovery mechanism 113 are provided in the first shell 111. The guide plate 112 is arranged below the heat exchange mechanism 13 at intervals. The guide plate 112 is inclined downward in the front-to-back direction. The recovery mechanism 113 is arranged downstream of the guide plate 112. The guide plate 112 can better guide the fluid on it to the recovery mechanism 113. The recovery mechanism 113 can achieve a better recovery effect on fluids such as grease and condensed water. Exemplarily, the recovery mechanism 113 can be an oil box with an upper opening. Exemplarily, the inclination angle of the guide plate 112 is 1‰ to 20‰, wherein 3‰ to 5‰ is preferred.

[0089] In an optional embodiment, if Figure 5As shown, the first heat exchange device 11 further includes a locking mechanism 114, which is disposed between the recovery mechanism 113 and the first shell 111. The recovery mechanism 113 is detachably connected to the first shell 111 through the locking mechanism 114, thereby enabling the user to quickly disassemble and assemble the recovery mechanism 113, and facilitating the user to clean the recovery mechanism 113 after taking it out. Exemplarily, the locking mechanism 114 can be a snap assembly, a locking assembly, a magnetic assembly, a screw, a pin, etc. All structures that can achieve disassembly and assembly between the recovery mechanism 113 and the first shell 111 are included in this optional embodiment.

[0090] In an optional embodiment, if Figure 5 As shown, the first shell 111 includes a shell body 1112 and a movable plate 1113. A replacement port (not numbered in the figure) is provided on the bottom plate 11123 of the shell body 1112. The recovery mechanism 113 is arranged just above the replacement port. A movable plate 1113 is arranged at the replacement port. The movable plate 1113 can switch between a first position of blocking the replacement port and a second position of opening the replacement port. When the movable plate 1113 is in the first position, the range hood heat recovery system 100 can be aesthetically pleasing; when the movable plate 1113 is in the second position, it is convenient for users to replace and maintain the recovery mechanism 113.

[0091] Exemplarily, the movable plate 1113 is movably connected to the shell body 1112, and the movable connection may be a rotating connection, a sliding connection, etc.

[0092] In an optional embodiment, a locking member may be further provided between the movable plate 1113 and the shell body 1112 , so as to ensure a stable connection between the movable plate 1113 and the shell body 1112 and ensure that the movable plate 1113 is well maintained in the first position.

[0093] In an optional embodiment, if Figure 1 As shown, the heat recovery device 10 further includes a first fan 192, which is disposed downstream of the heat exchange mechanism 13 and is connected to the exhaust duct 223 of the rear section. The first fan 192 can filter grease and moisture in the smoke and can also enable the smoke generated by the stove 21 to be absorbed by the range hood 22. The first fan 192 can be a single-inlet fan, a double-inlet fan, or the like.

[0094] In an optional embodiment, if Figure 1 to Figure 4As shown, the heat recovery device 10 further includes a heat conducting mechanism 14, which is disposed between the first shell 111 and the second shell 121, and the heat conducting mechanism 14 is respectively connected to the first shell 111 and the second shell 121. Through the arrangement of the heat conducting mechanism 14, the heat in the first cavity 1111 can be quickly and massively transferred to the second cavity 1211. Exemplarily, the heat conducting mechanism 14 can be made of a high thermal conductivity material such as silicon, oxygen-free copper, and silver.

[0095] In an optional embodiment, if Figure 1 to Figure 4 As shown, the heat recovery device 10 further includes a buffer mechanism 15, which is disposed between the first shell 111 and the second shell 121. The buffer mechanism 15 can avoid collision between the vibrating first shell 111 and the second shell 121, reduce noise during use of the heat recovery device 10, achieve silent use of the heat recovery device 10 and the range hood heat recovery system 100, and avoid damage to the first shell 111 and the second shell 121. Exemplarily, the buffer mechanism 15 can be a spring, rubber, foam, silicone, a buffer, etc., and all structures that can achieve buffering are within the protection scope of this optional embodiment.

[0096] In an optional embodiment, if Figure 1 to Figure 4 As shown, the buffer mechanism 15 is made of a thermal insulation material, and the buffer mechanism 15 is arranged around the periphery of the heat conducting mechanism 14. The thermal insulation material plays a role in insulating the heat conducting mechanism 14, and can reduce the diffusion and loss of heat to the surrounding environment. Exemplarily, the buffer mechanism 15 can be made of organic thermal insulation materials, inorganic thermal insulation materials, etc. Among them, the organic thermal insulation materials can be polyurethane foam, polystyrene board, EPS, XPS, phenolic foam, etc. The inorganic thermal insulation materials can be ceramic fiber blankets, aluminum silicate felt, alumina, silicon carbide fibers, aerogel felt, glass wool, rock wool, expanded perlite, micro-nano thermal insulation materials, etc. All materials that can achieve buffering and thermal insulation at the same time are within the protection scope of this optional embodiment.

[0097] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A heat recovery device, comprising a first shell (111) capable of being connected to a range hood (22) and a second shell (121) capable of being connected to a ventilation system (30), wherein the second shell (121) is arranged above the first shell (111), characterized in that: The heat recovery device also includes: A heat exchange mechanism (13) extends from the interior of the first shell (111) to the interior of the second shell (121), and the heat exchange mechanism (13) has a first end (1321) and a second end (1361); the first end (1321) is spaced apart from the bottom plate (11123) of the first shell (111), and / or the second end (1361) is spaced apart from the upper end plate (1213) of the second shell (121).

2. The heat recovery device according to claim 1, characterized in that: The maximum distance between the first end (1321) and the top plate (11122) of the first shell (111) in the vertical direction is a first distance h1, and the height of the first shell (111) in the vertical direction is a first height H1, wherein h1 / H1 is 0.6-0.9; and / or The maximum distance between the second end (1361) and the lower end plate (1214) of the second shell (121) in the up-down direction is a second distance h2, and the height of the second shell (121) in the up-down direction is a second height H2, wherein h2 / H2 is 0.6-0.

9.

3. The heat recovery device according to any one of claims 1 to 2, characterized in that: The first shell (111) has an air inlet (11121), and the smoke at the air inlet (11121) can flow along a first direction. The heat exchange mechanism (13) comprises a windward surface (133) and a leeward surface (134), and the smoke flows through the windward surface (133) and the leeward surface (134) in sequence. The heat exchange mechanism (13) can rotate relative to the first shell (111) to adjust the inclination angle α of the windward surface (133) relative to the first direction.

4. The heat recovery device according to claim 3, characterized in that: The heat exchange mechanism (13) comprises a heat exchange body (131) and a plurality of first heat exchange fins (132) arranged thereon, at least a portion of the heat exchange body (131) is arranged inside the second shell (121), the heat exchange body (131) is rotatably connected to the first shell (111) and / or the second shell (121), and the first heat exchange fins (132) are located inside the first shell (111).

5. The heat recovery device according to claim 4, characterized in that: A plurality of the first heat exchange fins (132) constitute at least two groups of first heat exchange fin groups arranged along a first preset direction, each group of the first heat exchange fin groups comprises at least two first heat exchange fins (132) arranged at intervals along a second preset direction, and the first heat exchange fins (132) of two adjacent groups of the first heat exchange fin groups are arranged in an alternating manner.

6. The heat recovery device according to any one of claims 1 to 2, characterized in that: A guide plate (112) and a recovery mechanism (113) arranged downstream of the guide plate (112) are arranged in the first shell (111), and the guide plate (112) is arranged at intervals below the first end (1321).

7. The heat recovery device according to claim 6, characterized in that: The first shell (111) has an air inlet (11121), and smoke at the air inlet (11121) can flow along a first direction, and the guide plate (112) is inclined downward along the first direction.

8. The heat recovery device according to any one of claims 1 to 2, characterized in that: The heat exchange mechanism (13) is made of heat-conducting material.

9. The heat recovery device according to any one of claims 1 to 2, characterized in that: The heat recovery device further comprises a smoke concentration detection mechanism (16), wherein the smoke concentration detection mechanism (16) is located upstream of the heat exchange mechanism (13), and the smoke concentration detection mechanism (16) is used to detect the concentration of the smoke upstream of the heat exchange mechanism (13); and / or The heat recovery device further comprises a first detection mechanism (17) and a second detection mechanism (18), wherein the first detection mechanism (17) is arranged upstream of the heat exchange mechanism (13), and the second detection mechanism (18) is arranged downstream of the heat exchange mechanism (13), and the first detection mechanism (17) and the second detection mechanism (18) are both capable of detecting the flow rate of the flue gas and the temperature of the flue gas; and / or The heat recovery device further comprises a temperature detection mechanism (191), wherein the temperature detection mechanism (191) is used to detect the outdoor temperature; and / or The heat recovery device further comprises a heat conducting mechanism (14), wherein the heat conducting mechanism (14) is arranged between the first shell (111) and the second shell (121), and the heat conducting mechanism (14) is respectively connected to the first shell (111) and the second shell (121); and / or The heat recovery device further comprises a buffer mechanism (15), wherein the buffer mechanism (15) is arranged between the first shell (111) and the second shell (121).

10. A range hood heat recovery system, comprising a range hood (22) and a ventilation system (30), characterized in that: The range hood heat recovery system further comprises a heat recovery device according to any one of claims 1 to 9, wherein the first shell (111) is connected to the range hood (22), and the second shell (121) is connected to the ventilation system (30).

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