Waste heat recovery mechanism and range hood having the same

Abstract

The present invention relates to the technical field of range hoods, and specifically to a waste heat recovery and utilization mechanism and a range hood having the same, including a waste heat absorption mechanism, the waste heat absorption mechanism comprising a smoke extraction hood, a water storage cylinder and a heat conduction coil, the water storage cylinder is sealed and wrapped around the outside of the smoke extraction hood, and the water storage cylinder is filled with a heat conduction medium, the heat conduction coil is located inside the water storage cylinder, and both ends of the heat conduction coil extend to the outside of the water storage cylinder respectively; the present invention is provided with a waste heat absorption mechanism and a heat preservation box, wherein the waste heat absorption mechanism absorbs heat in high-temperature smoke by boiling water, and the absorbed heat can act on the heat preservation box, thereby preventing the dishes in the heat preservation box from getting cold.

Description

Technical Field

[0001] The invention relates to the technical field of range hoods, and in particular to a waste heat recovery mechanism and a range hood having the same. Background Art

[0002] As one of the essential appliances in modern family kitchens, range hoods can absorb the high-temperature smoke generated when cooking and keep the kitchen clean, so they are also very popular among consumers. At present, the existing range hoods on the market can be divided into multimedia range hoods, embedded range hoods, wall-mounted range hoods, side-mounted range hoods, solid wood range hoods, etc. based on their functional structure.

[0003] Nowadays, although different types of range hoods have different appearances, the main principle is to generate suction through a centrifugal fan, so that the high-temperature smoke generated when cooking is sucked into the range hood and discharged through a pipe. Therefore, the function is relatively single and cannot meet the various practical needs of users when cooking. For example, high-temperature smoke not only contains oil smoke, but also heat. Existing range hoods generally discharge oil smoke directly to the outdoors, and fail to fully utilize the heat contained in the high-temperature smoke, so there is energy waste. In addition, when cooking, users often need to cook several dishes, and each time they finish cooking a dish, they can only put the cooked dish aside. Over time, it is easy to cause the first cooked dish to get cold, which in turn affects the user's dining experience.

[0004] On the other hand, in order to prevent the previously cooked dishes from cooling down, users can also put the dishes in a heat preservation steamer or other heat preservation tools, but this method requires the preparation of heat preservation tools, which is troublesome on the one hand and consumes extra electricity on the other hand. In view of this, we propose a waste heat recovery mechanism and a range hood with the same to solve the above drawbacks. Summary of the invention

[0005] The object of the present invention is to provide a waste heat recovery mechanism and a range hood having the same, so as to solve the problems raised in the above-mentioned background technology.

[0006] The present invention is achieved through the following technical solutions:

[0007] A waste heat recovery mechanism, comprising:

[0008] A waste heat absorption mechanism, the waste heat absorption mechanism comprising a smoke hood, a water storage cylinder and a heat conduction coil, the water storage cylinder is sealed and wrapped around the outside of the smoke hood, and the water storage cylinder is filled with a heat conduction medium, the heat conduction coil is located inside the water storage cylinder, and both ends of the heat conduction coil extend out of the water storage cylinder respectively;

[0009] An insulated box, wherein a sealed box door is hingedly provided at the front side of the insulated box, an air outlet pipe and an air inlet pipe are respectively provided at the top and bottom of the side wall of the insulated box, and the air outlet pipe and the air inlet pipe are respectively connected to the two ends of the heat conducting coil through two air supply pipes; and

[0010] The air supply mechanism is arranged on the top of the heat preservation box and is used to fill the gas in the heat preservation box into the air outlet pipe.

[0011] Optionally, a fixed bearing part is provided on the inner side of the bottom of the thermal insulation box, and a movable bearing part is elastically connected to the middle position of the interior of the thermal insulation box through an elastic member, the fixed bearing part is fixedly connected to the inner wall of the thermal insulation box, and a plurality of through holes are opened on the fixed bearing part, and the inner end of the air inlet pipe extends into the thermal insulation box and is located below the fixed bearing part.

[0012] Optionally, a circulation cavity is opened inside the left and right side walls of the insulation box, and a first air hole communicating with the circulation cavity is opened on the inner side walls of the insulation box and below the fixed bearing part. The movable bearing part is an internal hollow structure, and a second air hole is opened on the left and right side walls of the movable bearing part. A third air hole is opened in the middle section of the left and right side walls of the insulation box. When the movable bearing part is in an unloaded state, the second air hole and the third air hole are staggered.

[0013] Optionally, the left and right side walls of the thermal insulation box are provided with vertically distributed slide rails, the slide rails are slidably matched with the movable bearing part, and the bottom end of the slide rails is provided with a blocking block. When the bottom surface of the movable bearing part abuts against the blocking block, the second air hole and the third air hole are aligned and distributed; the top surfaces of the fixed bearing part and the movable bearing part are provided with a hollow frame, and the top surface of the movable bearing part and below the hollow frame are also provided with an air leakage port.

[0014] Optionally, sliding openings communicating with the circulation cavity are provided on both sides of the left and right side walls of the thermal insulation box and on both sides of the movable bearing part, and guide rods are provided in the circulation cavities on both sides of the thermal insulation box, and an extension column is protruding from one side of the guide rod, and the extension column passes through the sliding opening and is fixedly connected to the side wall of the movable bearing part, and a blocking block is also provided at the bottom end of the guide rod; when the movable bearing part is in an unloaded state, the blocking block is aligned with the first air hole.

[0015] Optionally, the fixed bearing part is an internal hollow structure, and displacement plates are symmetrically and movably provided on the left and right sides of the interior of the fixed bearing part, and the displacement plates are elastically connected to the inner side of the fixed bearing part through a reset spring. A number of air holes corresponding to the through holes are penetrated through the displacement plates, and a traction rope is provided at the opposite ends of the two displacement plates, and one end of the traction rope away from the displacement plate extends to the outside of the fixed bearing part and is connected to the corresponding blocking block; when the movable bearing part is in an unloaded state, the air holes are aligned with the through holes, and when the bottom surface of the movable bearing part abuts against the blocking block, the air holes are staggered with the through holes.

[0016] Optionally, a plurality of fourth air holes are formed through the bottom wall of the movable bearing part, a covering plate is slidably connected to the inner bottom surface of the movable bearing part, a plurality of fifth air holes corresponding to the fourth air holes are formed through the covering plate, a pulling rope is connected to one end of the covering plate, an end of the pulling rope away from the covering plate extends to the top of the movable bearing part and is fixedly connected to the inner wall of the insulation box; when the movable bearing part is in an unloaded state, the fourth air holes and the fifth air holes are staggered, and when the bottom surface of the movable bearing part abuts against the blocking block, the fourth air holes and the fifth air holes are aligned.

[0017] Optionally, there are two waste heat absorption mechanisms and two air supply mechanisms, and the two air supply mechanisms are symmetrically distributed on both sides of the top of the insulation box. The air supply mechanism includes an air supply box and an air supply fan. The air supply box runs through the side wall of the insulation box, and the inner and outer ends of the air supply box are respectively provided with an air inlet and an air outlet. The air supply fan is located on the inner side of the air supply box. There are two air outlet pipes in total, and the two air outlet pipes are respectively connected to the air outlets on the outer walls of the two air supply boxes.

[0018] Optionally, the inner wall of the air supply box and the outer side of the air outlet are movably covered with a shielding sheet, and an exhaust port is provided on the shielding sheet. The bottom end of the guide rod extends into the air supply box and is fixedly connected to the shielding sheet; when the movable bearing part is in an unloaded state, the exhaust port is partially aligned with the air outlet, and when the bottom surface of the movable bearing part abuts against the blocking block, the exhaust port is completely aligned with the air outlet.

[0019] The present invention also proposes a range hood, comprising a range hood body and the above-mentioned waste heat recovery and utilization mechanism. A accommodating cavity is opened in the middle position of the front side of the range hood body, and the insulation box is arranged in the accommodating cavity. Two centrifugal fans are also arranged inside the range hood body, and the two centrifugal fans correspond one by one to the two waste heat absorption mechanisms respectively. The air inlet end of the centrifugal fan is connected to the top of the smoke hood.

[0020] Compared with the prior art, the present invention provides a waste heat recovery mechanism and a range hood having the same, which has the following beneficial effects:

[0021] 1. The present invention has a waste heat absorption mechanism and a heat preservation box, wherein the waste heat absorption mechanism absorbs the heat in the high-temperature flue gas by boiling water, and the absorbed heat can act on the heat preservation box, thereby preventing the dishes in the heat preservation box from cooling down;

[0022] 2. The heat preservation box of the present invention has a fixed load-bearing part and a movable load-bearing part. When only dishes are placed on the fixed load-bearing part, all the heat acts on the dishes on the fixed load-bearing part first, thus helping to fully utilize the heat to keep the dishes warm;

[0023] 3. After placing dishes on the movable bearing part of the present invention, the gas entering the heat preservation box is divided into two streams, and the two streams of high-temperature gas act on two dishes respectively. Therefore, the present invention can automatically change the airflow path according to the change in the number of dishes, thereby fully improving the heat preservation effect of the dishes;

[0024] 4. The water storage cylinder in the present invention is connected to the outside through a water supply pipe and a drainage pipe, which is not only convenient for water supply, but also convenient for discharging hot water for washing dishes or other purposes, thereby further improving the energy utilization rate of the waste heat absorption mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of the range hood of the present invention;

[0026] Figure 2 This is a cross-sectional view of the range hood structure of the present invention;

[0027] Figure 3 It is a schematic diagram of the waste heat absorption mechanism of the present invention;

[0028] Figure 4 This is a schematic diagram of the structure of the smoking hood of the present invention;

[0029] Figure 5 This is a schematic diagram of the structure of the heat preservation box of the present invention;

[0030] Figure 6 It is a cross-sectional view of the waste heat absorption mechanism of the present invention;

[0031] Figure 7 This is a cross-sectional view of the structure of the heat preservation box of the present invention;

[0032] Figure 8 It is a schematic diagram of the guide rod structure of the present invention;

[0033] Fig. 9 It is a structural schematic diagram of the fixed bearing part of the present invention;

[0034] Fig.10 It is a structural schematic diagram of the movable bearing part of the present invention;

[0035] Fig.11This is a schematic diagram of the air supply mechanism of the present invention;

[0036] Fig.12 for Figure 7 The corresponding figure at A is enlarged;

[0037] Fig.13 for Figure 7 The corresponding figure at point B is enlarged.

[0038] In the figure: 100, waste heat absorption mechanism; 101, smoke hood; 102, water storage cylinder; 103, heat conduction coil; 104, heat conduction sheet; 105, water supply pipeline; 106, drainage pipeline; 200, heat preservation box; 201, sealed box door; 202, air outlet pipe; 203, air inlet pipe; 204, fixed bearing part; 205, elastic member; 206, movable bearing part; 207, through hole; 208, fixed block; 209, circulation cavity; 210, first air hole; 211, second air hole; 212, third air hole; 213, slide rail; 214, blocking block; 215, hollow frame ; 216, air leakage port; 217, sliding port; 218, guide rod; 219, extension column; 220, blocking block; 221, displacement plate; 222, reset spring; 223, air vent; 224, traction rope; 225, fourth air hole; 226, fifth air hole; 227, covering plate; 228, pulling rope; 300, air supply mechanism; 301, air supply box; 302, air supply fan; 303, air inlet; 304, air outlet; 305, shielding piece; 306, exhaust port; 400, range hood body; 401, accommodating cavity; 402, centrifugal fan; 403, display. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] Example 1: Please refer to Figure 3-13A waste heat recovery and utilization mechanism includes a waste heat absorption mechanism 100, a heat preservation box 200 and an air supply mechanism 300, wherein the waste heat absorption mechanism 100 includes a smoke hood 101, a water storage cylinder 102 and a heat conductive coil 103, the water storage cylinder 102 is sealed and wrapped on the outside of the smoke hood 101, and the water storage cylinder 102 is filled with a heat conductive medium, the heat conductive coil 103 is located inside the water storage cylinder 102, and both ends of the heat conductive coil 103 extend to the outside of the water storage cylinder 102 respectively; specifically, in the present embodiment, there are two waste heat absorption mechanisms 100, and the smoke hood 101 is made of aluminum alloy and has good thermal conductivity. The outer surface of the smoke hood 101 is also provided with a plurality of heat conductive sheets 104 for increasing the heat dissipation area.

[0041] It should be noted that the outside of the water storage cylinder 102 is also connected to a water supply pipe 105 and a drainage pipe 106, wherein the water supply pipe 105 is connected to the faucet in the home for water supply, and the drainage pipe 106 is used to discharge the hot water in the water storage cylinder 102, and the hot water in the water storage cylinder 102 can be used for washing dishes or other purposes.

[0042] Furthermore, the front side of the heat preservation box 200 is hinged with a sealed box door 201. Figure 5 As shown, an air outlet pipe 202 and an air inlet pipe 203 are respectively provided at the top and bottom of the side wall of the thermal insulation box 200, and the air outlet pipe 202 and the air inlet pipe 203 are respectively connected to the two ends of the heat-conducting coil 103 through two air supply pipes; specifically, there are two air outlet pipes 202 and two air inlet pipes 203, wherein the air outlet pipe 202 is used to send the air in the thermal insulation box 200 into the heat-conducting coil 103, and the air inlet pipe 203 is used to send the hot air in the heat-conducting coil 103 back to the thermal insulation box 200.

[0043] Furthermore, there are two air supply mechanisms 300, such as Figure 7 As shown, two air supply mechanisms 300 are arranged on both sides of the top of the thermal insulation box 200, and are used to fill the gas in the thermal insulation box 200 into the air outlet pipe 202; that is, to make the gas circulate inside the thermal insulation box 200 and the heat conduction coil 103.

[0044] In the specific application process of this embodiment, when the high-temperature smoke passes through the interior of the smoke hood 101, the smoke hood 101 can be heated, and after the smoke hood 101 is heated, the heat can be transferred to the water inside the water storage cylinder 102, thereby heating the water. The heat-conducting coil 103 is immersed in water, so the heat-conducting coil 103 also heats up, and when the air passes through the interior of the heat-conducting coil 103, the air can be heated, so that the interior of the heat-insulating box 200 is kept at a certain temperature.

[0045] The internal structure of the thermal insulation box 200 is introduced as follows:

[0046] A fixed bearing part 204 is provided at the inner side of the bottom of the heat preservation box 200, and a movable bearing part 206 is elastically connected to the middle part of the heat preservation box 200 through an elastic member 205. The fixed bearing part 204 is fixedly connected to the inner wall of the heat preservation box 200, and a plurality of through holes 207 are formed through the fixed bearing part 204. The inner end of the air inlet pipe 203 extends into the heat preservation box 200 and is located below the fixed bearing part 204. Specifically, fixed blocks 208 are provided on both side walls of the heat preservation box 200 and below the movable bearing part 206, and an elastic member 205 is connected between the fixed block 208 and the movable bearing part 206. Fig.12 As shown, the elastic member 205 in this embodiment is a spring, so the corresponding movable bearing portion 206 is elastically connected to the fixed block 208 .

[0047] In addition, the left and right side walls of the heat preservation box 200 are provided with a circulation cavity 209, and the inner side walls of the heat preservation box 200 and the lower side walls of the fixed bearing portion 204 are provided with a first air hole 210 communicating with the circulation cavity 209. Fig.13 As shown, the movable bearing part 206 is an internal hollow structure, and the left and right side walls of the movable bearing part 206 are both provided with second air holes 211, and the middle sections of the left and right side walls of the heat preservation box 200 are both provided with third air holes 212. When the movable bearing part 206 is in an unloaded state, the second air holes 211 and the third air holes 212 are staggered. That is, when no plate is placed on the movable bearing part 206, gas cannot enter the movable bearing part 206.

[0048] Furthermore, the left and right side walls of the heat preservation box 200 are both provided with slide rails 213 distributed vertically. Fig.12 As shown, the slide rail 213 is slidably matched with the movable bearing part 206, and a blocking block 214 is provided at the bottom end of the slide rail 213. When the bottom surface of the movable bearing part 206 abuts against the blocking block 214, the second air hole 211 and the third air hole 212 are aligned and distributed; when a plate is placed on the movable bearing part 206, due to the action of gravity, the movable bearing part 206 moves downward until the bottom surface of the movable bearing part 206 abuts against the blocking block 214. At this time, the gas in the circulation cavity 209 can smoothly enter the interior of the movable bearing part 206.

[0049] It should be added that the weight of an ordinary household plate is usually more than 200 grams. If the dishes in the plate are included, the total weight of the plate is generally more than 500 grams. In order to ensure that the movable bearing part 206 in this embodiment can be pressed down smoothly, an elastic member 205 with a suitable stiffness coefficient should be selected. Specifically, in this embodiment, when the weight of the plate on the movable bearing part 206 exceeds 200 grams, the movable bearing part 206 can be pressed down smoothly until it abuts against the blocking block 214.

[0050] In addition, a hollow frame 215 is provided on the top surface of the fixed bearing part 204 and the movable bearing part 206, and a gas leakage port 216 is provided on the top surface of the movable bearing part 206 and below the hollow frame 215. The hollow frame 215 is made of a porous plate, and its function is to prevent the plate from blocking the air holes on the fixed bearing part 204 or the movable bearing part 206, thereby facilitating the high-temperature gas to act more fully on the plate.

[0051] Furthermore, the left and right side walls of the heat preservation box 200 and the two sides of the movable bearing portion 206 are provided with sliding openings 217 communicating with the flow cavity 209. Fig.12 As shown, guide rods 218 are provided in the circulation cavities 209 on both sides of the heat preservation box 200, and an extension column 219 is protrudingly formed on one side of the guide rod 218. The extension column 219 passes through the sliding opening 217 and is fixedly connected to the side wall of the movable bearing part 206. A blocking block 220 is also provided at the bottom end of the guide rod 218; when the movable bearing part 206 is in an unloaded state, the blocking block 220 is aligned with the first air hole 210. Due to the arrangement of the extension column 219 and the guide rod 218, the blocking block 220 and the movable bearing part 206 can move synchronously. When there is no plate on the movable bearing part 206, the first air hole 210 is blocked and the gas cannot enter the circulation cavity 209; when a plate is placed on the movable bearing part 206, the movable bearing part 206 moves downward, and the blocking block 220 also moves downward, thereby exposing the first air hole 210, and at this time, the high-temperature gas can smoothly enter the circulation cavity 209.

[0052] It should be added that the sliding opening 217 and the third air hole 212 on the inner wall of the insulation box 200 are both located on the side of the movable bearing part 206, and the gap between the movable bearing part 206 and the inner surface of the insulation box 200 is very small, so as to ensure that the high-temperature gas entering the circulation cavity 209 can smoothly pass through the second air hole 211 and the third air hole 212 into the movable bearing part 206.

[0053] In this embodiment, plates can be placed on both the fixed bearing part 204 and the movable bearing part 206, but in specific applications, the plates should be placed on the fixed bearing part 204 first. Specifically, when only the fixed bearing part 204 is placed, the high-temperature gas enters the bottom of the heat preservation box 200 through the air inlet pipe 203, and then the high-temperature gas enters between the fixed bearing part 204 and the movable bearing part 206 through the through hole 207, and is used to heat the plate on the fixed bearing part 204. When the second plate is placed on the movable bearing part 206, part of the high-temperature gas can enter the circulation cavity 209 through the first air hole 210, and then enter the movable bearing part 206 through the second air hole 211 and the third air hole 212, and finally act on the second plate through the air leakage port 216. That is, when there is only one plate, all the gas acts on one plate, and when there are two plates, the high-temperature gas is divided into two parts, which act on the two plates respectively. Therefore, this embodiment can automatically change the airflow path according to the number of plates, so as to better meet the needs of users.

[0054] In another embodiment of the present application, the fixed bearing part 204 is an internal hollow structure, and the displacement plates 221 are symmetrically and movably disposed on both left and right sides of the fixed bearing part 204. Fig. 9 As shown, the displacement plate 221 is elastically connected to the inner side of the fixed bearing part 204 through the return spring 222, and a plurality of air holes 223 corresponding to the through holes 207 are formed on the displacement plate 221. The opposite ends of the two displacement plates 221 are provided with traction ropes 224, and the end of the traction rope 224 away from the displacement plate 221 extends to the outer side of the fixed bearing part 204 and is connected to the corresponding blocking block 220; when the movable bearing part 206 is in an unloaded state, the air holes 223 are aligned with the through holes 207, and when the bottom surface of the movable bearing part 206 abuts against the blocking block 214, the air holes 223 are staggered with the through holes 207. Specifically, the traction rope 224 is in a taut state, and the return spring 222 is in a compressed state, and the two displacement plates 221 can slide left and right on the inner side of the fixed bearing part 204 to change the alignment degree of the air holes 223 and the through holes 207.

[0055] More specifically, when no plate is placed on the movable bearing part 206, the plurality of air holes 223 are aligned with the through holes 207, that is, at this time, the flow rate of the fixed bearing part 204 is the largest, which facilitates the high-temperature gas to fully act on the plate on the fixed bearing part 204; when a plate is placed on the movable bearing part 206, the two displacement plates 221 move in opposite directions under the pulling force of the traction rope 224, and at this time, all the through holes 207 are staggered with the air holes 223, but the through holes 207 located on the side away from the traction rope 224 are in an open state because they are no longer blocked by the displacement plates 221. Therefore, when a plate is placed on the movable bearing part 206, the number of open through holes 207 on the fixed bearing part 204 is reduced, which helps to discharge the gas from the first air hole 210 and act on the plate on the movable bearing part 206.

[0056] In another embodiment of the present application, a plurality of fourth air holes 225 are formed through the bottom wall of the movable bearing portion 206, a covering plate 227 is slidably connected to the inner bottom surface of the movable bearing portion 206, a plurality of fifth air holes 226 corresponding to the fourth air holes 225 are formed through the covering plate 227, a pulling rope 228 is connected to one end of the covering plate 227, an end of the pulling rope 228 away from the covering plate 227 extends to the top of the movable bearing portion 206 and is fixedly connected to the inner wall of the thermal insulation box 200; when the movable bearing portion 206 is in an unloaded state, the fourth air holes 225 and the fifth air holes 226 are staggered, and when the bottom surface of the movable bearing portion 206 abuts against the blocking block 214, the fourth air holes 225 and the fifth air holes 226 are aligned. The covering plate 227 is slidably matched with the inner bottom surface of the movable bearing part 206 in the left-right direction, and when the movable bearing part 206 is in an unloaded state, the pulling rope 228 is in a taut state; when a plate is placed on the movable bearing part 206, the fourth air hole 225 and the fifth air hole 226 are aligned, and the gas below can smoothly enter the movable bearing part 206.

[0057] In this embodiment, when the movable supporting part 206 is unloaded, the fourth air hole 225 and the fifth air hole 226 are in a misaligned state. At this time, the high-temperature gas between the fixed supporting part 204 and the movable supporting part 206 cannot overflow smoothly (it can only slowly overflow from the gap around the movable supporting part 206), thereby helping to fully heat the plate on the fixed supporting part 204; when the plate is placed on the movable supporting part 206, the fourth air hole 225 and the fifth air hole 226 are aligned, so the gas under the movable supporting part 206 can smoothly enter the movable supporting part 206, thereby helping to make more heat act on the plate on the movable supporting part 206.

[0058] Further, the air supply mechanism 300 includes an air supply box 301 and an air supply fan 302. The air supply box 301 penetrates the side wall of the heat preservation box 200. The air supply box 301 is provided with an air inlet 303 and an air outlet 304 at both ends. The air supply fan 302 is located inside the air supply box 301. Two air outlet pipes 202 are respectively connected to the air outlets 304 on the outer walls of the two air supply boxes 301. The inner wall of the air supply box 301 and the outer side of the air outlet 304 are movably covered with a shielding sheet 305. The shielding sheet 305 is provided with an exhaust port 306. The bottom end of the guide rod 218 extends into the air supply box 301 and is fixedly connected to the shielding sheet 305. When the movable bearing part 206 is in an unloaded state, the exhaust port 306 is partially aligned with the air outlet 304. When the bottom surface of the movable bearing part 206 abuts against the blocking block 214, the exhaust port 306 is completely aligned with the air outlet 304. When the exhaust port 306 and the air outlet 304 are partially aligned, that is, the exhaust cross-section of the exhaust port 306 is smaller, and when the exhaust port 306 and the air outlet 304 are completely aligned, the exhaust cross-section of the exhaust port 306 is larger; therefore, when the movable supporting part 206 is in an unloaded state, the gas circulation speed is slower, and when a plate is placed on the movable supporting part 206, the gas circulation speed is faster.

[0059] It should be noted that, when only a plate is placed on the fixed supporting portion 204, since the first air hole 210 is in a closed state and the fourth air hole 225 is also in a closed state, a too fast air flow speed is not required, so the exhaust cross-section of the exhaust port 306 is kept in a smaller state at this time; when a plate is also placed on the movable supporting portion 206, since the high-temperature gas needs to fully act on the two plates, the air flow speed needs to be appropriately increased, so the exhaust cross-section of the exhaust port 306 is kept in a larger state at this time.

[0060] Example 2: Please refer to Figure 1 and Figure 2 A range hood includes a range hood body 400 and a waste heat recovery mechanism as in the first embodiment, wherein a receiving cavity 401 is provided in the middle of the front of the range hood body 400, and a heat preservation box 200 is arranged in the receiving cavity 401. Two centrifugal fans 402 are also arranged inside the range hood body 400, and the two centrifugal fans 402 correspond to the two waste heat absorption mechanisms 100 respectively, and the air inlet end of the centrifugal fan 402 is connected to the top of the smoke hood 101. It is worth mentioning that the air supply pipes connected to the outer ends of the air outlet pipe 202 and the air inlet pipe 203 are both provided with electromagnetic valves for controlling the on and off of the air supply pipes.

[0061] It is worth mentioning that a temperature sensor is provided in the water storage cylinder 102, and a display 403 for displaying the temperature is provided on the front panel of the range hood body 400. The temperature sensor is electrically connected to the display 403, and is used to reflect the water temperature in the water storage cylinder 102 in real time on the panel on the front side of the range hood body 400, thereby facilitating the user to judge whether the water temperature is suitable for hot dishes.

[0062] In summary, in the actual application of this embodiment, when one of the centrifugal fans 402 is turned on, the solenoid valves on the two corresponding air supply pipes are opened, and the corresponding air supply fan 302 is turned on at the same time, and the gas will circulate continuously inside the heat preservation box 200 and the heat conduction coil 103, thereby raising the temperature inside the heat preservation box 200. It should be pointed out that when only a plate is placed on the fixed bearing part 204, the circulation speed of the gas is slow, and because the first air hole 210 and the fourth air hole 225 are both in a closed state, most of the gas is concentrated between the fixed bearing part 204 and the movable bearing part 206, so that it can fully act on a plate on the fixed bearing part 204.

[0063] When a plate is placed on the movable support part 206, the air circulation speed is faster, and the air entering the heat preservation box 200 is divided into two streams, one stream of air passes through the through hole 207 and continuously acts on the plate on the fixed support part 204, and the other stream of air passes through the first air hole 210, the second air hole 211, and the third air hole 212 and acts on the plate on the movable support part 206, that is, as the number of plates changes, the air flow path also changes. Specifically, when a plate is placed on the movable support part 206, the number of open through holes 207 decreases, and the fourth air hole 225 is fully opened, which allows more heat to act on the plate placed later.

[0064] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0065] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A waste heat recovery mechanism, characterized in that: include: A waste heat absorption mechanism (100), the waste heat absorption mechanism (100) comprising a smoking hood (101), a water storage cylinder (102) and a heat-conducting coil (103), the water storage cylinder (102) being sealed and wrapped around the outside of the smoking hood (101), and the water storage cylinder (102) being filled with a heat-conducting medium, the heat-conducting coil (103) being located inside the water storage cylinder (102), and both ends of the heat-conducting coil (103) respectively extending to the outside of the water storage cylinder (102); An insulated box (200), wherein a sealed box door (201) is hingedly provided at the front side of the insulated box (200), an air outlet pipe (202) and an air inlet pipe (203) are respectively provided at the top and bottom of the side wall of the insulated box (200), and the air outlet pipe (202) and the air inlet pipe (203) are respectively connected to two ends of the heat conducting coil (103) through two air supply pipes; An air supply mechanism (300), the air supply mechanism (300) being arranged on the top of the heat preservation box (200) and being used for filling the gas in the heat preservation box (200) into the air outlet pipe (202); A fixed bearing part (204) is provided on the inner side of the bottom of the heat preservation box (200); a movable bearing part (206) is elastically connected to the middle section of the heat preservation box (200) via an elastic member (205); the fixed bearing part (204) is fixedly connected to the inner wall of the heat preservation box (200); a plurality of through holes (207) are formed through the fixed bearing part (204); the inner end of the air inlet pipe (203) extends into the heat preservation box (200) and is located below the fixed bearing part (204); The left and right side walls of the heat preservation box (200) are provided with a circulation cavity (209), the inner side walls of the heat preservation box (200) and located below the fixed bearing part (204) are provided with a first air hole (210) communicating with the circulation cavity (209), the movable bearing part (206) is an internal hollow structure, the left and right side walls of the movable bearing part (206) are provided with a second air hole (211), the left and right side walls of the heat preservation box (200) are provided with a third air hole (212) at the middle section, and when the movable bearing part (206) is in an unloaded state, the second air hole (211) and the third air hole (212) are staggeredly distributed; The left and right side walls of the thermal insulation box (200) are both provided with slide rails (213) distributed along the vertical direction, and the slide rails (213) are slidably matched with the movable bearing part (206). A blocking block (214) is provided at the bottom end of the slide rail (213). When the bottom surface of the movable bearing part (206) abuts against the blocking block (214), the second air hole (211) and the third air hole (212) are aligned and distributed.

2. A waste heat recovery mechanism according to claim 1, characterized in that: The top surfaces of the fixed bearing part (204) and the movable bearing part (206) are both provided with hollow frames (215), and the top surface of the movable bearing part (206) and below the hollow frame (215) are also provided with an air leakage port (216).

3. A waste heat recovery mechanism according to claim 2, characterized in that: The left and right side walls of the heat preservation box (200) and the two sides of the movable bearing part (206) are provided with sliding openings (217) communicating with the circulation cavity (209), and the circulation cavities (209) on both sides of the heat preservation box (200) are provided with guide rods (218), and one side of the guide rod (218) is protrudingly formed with an extension column (219), and the extension column (219) passes through the sliding opening (217) and is fixedly connected to the side wall of the movable bearing part (206), and the bottom end of the guide rod (218) is also provided with a blocking block (220); when the movable bearing part (206) is in an unloaded state, the blocking block (220) is aligned with the first air hole (210).

4. The waste heat recovery mechanism according to claim 3 is characterized in that: The fixed bearing part (204) is an internal hollow structure, and displacement plates (221) are symmetrically and movably provided on both left and right sides of the fixed bearing part (204). The displacement plates (221) are elastically connected to the inner side of the fixed bearing part (204) through a return spring (222). A plurality of air holes (223) corresponding to the through holes (207) are formed through the displacement plates (221), and traction ropes (223) are provided at the opposite ends of the two displacement plates (221). 224), one end of the traction rope (224) away from the displacement plate (221) extends to the outside of the fixed bearing part (204) and is connected to the corresponding blocking block (220); when the movable bearing part (206) is in an unloaded state, the air vent (223) and the through hole (207) are aligned and distributed; when the bottom surface of the movable bearing part (206) abuts against the blocking block (214), the air vent (223) and the through hole (207) are staggered and distributed.

5. The waste heat recovery mechanism according to claim 3 is characterized in that: The bottom wall of the movable bearing part (206) is penetrated with a plurality of fourth air holes (225); the inner bottom surface of the movable bearing part (206) is slidably connected with a covering plate (227); the covering plate (227) is penetrated with a plurality of fifth air holes (226) corresponding to the fourth air holes (225); one end of the covering plate (227) is connected with a pulling rope (228); the end of the pulling rope (228) away from the covering plate (227) extends to the top of the movable bearing part (206) and is fixedly connected to the inner wall of the thermal insulation box (200); when the movable bearing part (206) is in an unloaded state, the fourth air holes (225) and the fifth air holes (226) are staggered; when the bottom surface of the movable bearing part (206) abuts against the blocking block (214), the fourth air holes (225) and the fifth air holes (226) are aligned.

6. The waste heat recovery mechanism according to claim 3, characterized in that: The waste heat absorption mechanism (100) and the air supply mechanism (300) are both provided with two, and the two air supply mechanisms (300) are symmetrically distributed on both sides of the top of the heat preservation box (200). The air supply mechanism (300) comprises an air supply box (301) and an air supply fan (302). The air supply box (301) passes through the side wall of the heat preservation box (200). The inner and outer ends of the air supply box (301) are respectively provided with an air inlet (303) and an air outlet (304). The air supply fan (302) is located on the inner side of the air supply box (301). There are two air outlet pipes (202) in total, and the two air outlet pipes (202) are respectively connected to the air outlets (304) on the outer walls of the two air supply boxes (301).

7. The waste heat recovery mechanism according to claim 6, characterized in that: The inner wall of the air supply box (301) and the outer side of the air outlet (304) are movably covered with a shielding sheet (305), and an exhaust port (306) is provided on the shielding sheet (305). The bottom end of the guide rod (218) extends into the air supply box (301) and is fixedly connected to the shielding sheet (305); when the movable bearing part (206) is in an unloaded state, the exhaust port (306) is partially aligned with the air outlet (304); when the bottom surface of the movable bearing part (206) abuts against the blocking block (214), the exhaust port (306) is completely aligned with the air outlet (304).

8. A range hood, comprising a range hood body (400), and also comprising the waste heat recovery mechanism according to any one of claims 1 to 7, characterized in that: A receiving cavity (401) is provided in the middle of the front side of the range hood body (400), and the heat preservation box (200) is arranged in the receiving cavity (401). Two centrifugal fans (402) are also provided inside the range hood body (400), and the two centrifugal fans (402) correspond to the two waste heat absorption mechanisms (100) respectively, and the air inlet end of the centrifugal fan (402) is connected to the top end of the smoke hood (101).

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