Condenser of refrigeration extractor hood and refrigeration extractor hood

Abstract

The utility model discloses a condenser of a refrigeration range hood and the refrigeration range hood. The condenser of the refrigeration range hood comprises a main body capable of conducting heat and a refrigerant channel arranged on the main body, the main body comprises a first part and a second part, the first part is in the shape of a hollow pipeline and defines a smoke exhaust channel for oil smoke to pass through, and the second part is located in a space defined by the first part; a through hole penetrating through the wall thickness of the main body is formed in the main body, so that the part, provided with the through hole, of the main body forms a noise reduction plate; the second part is in direct contact with the first part, and the through hole is formed in the second part; or the second part is located in the space defined by the first part, the second part is in a hollow pipeline shape, the second part and the first part are in indirect contact through heat conduction fins, and the penetrating holes are formed in the fins.

Description

TECHNICAL FIELD

[0001] The utility model relates to a refrigeration device, especially a condenser of a refrigeration range hood, and a refrigeration range hood using the condenser. BACKGROUND

[0002] With the improvement of material life, people have higher and higher requirements for kitchen environment. People need to use stoves and other devices during cooking, and a large amount of heat is generated in the kitchen, which leads to an increase in the temperature of the entire space and a decrease in the comfort of the environment. At present, most families solve this problem by temporarily adding a fan, but this method is not only inconvenient but also occupies kitchen space.

[0003] Therefore, the prior art has disclosed a range hood with refrigeration function, which can blow cold air from the casing of the range hood to cool the kitchen. For example, a kind of air conditioner hood disclosed in Chinese patent No. 201810525673.7, the oil fume component of the air conditioner hood includes an oil fume passage; the air conditioner component includes a condenser component, the condenser component includes a condensing air inlet and a condensing air outlet, the condensing air outlet is communicated with the oil fume passage, and the condensing air inlet is independent of the oil fume passage. However, the arrangement of this condenser uses the main fan of the range hood for heat dissipation, which reduces the amount of oil smoke sucked and discharged, affecting the effect of sucking oil smoke.

[0004] There is also a kind of kitchen air conditioner disclosed in Chinese patent No. 202110029969.1, which includes an air conditioning component and a range hood component, the air conditioning component includes a compressor, a condenser, a throttling element, and an evaporator, the range hood component includes an exhaust pipe and an exhaust fan in the exhaust pipe, and the condenser is arranged around the outer wall of the exhaust pipe.

[0005] This kitchen air conditioner can use oil smoke to dissipate heat from the condenser without additional power. However, since the condenser is wrapped around the exhaust pipe, it is usually not guaranteed that the condenser can be completely attached to the exhaust pipe when it is wrapped, resulting in an air gap layer. Moreover, oil smoke needs to pass through a heat-conducting smoke pipe to exchange heat with the pipe wall of the condenser, and the long heat exchange path leads to low heat exchange efficiency.

[0006] Therefore, the applicant improves on the basis and obtains a blow-up condenser, which is also arranged as part of the exhaust passage, but the heat conduction path is greatly shortened and the heat conduction efficiency is improved. In order to reduce the size of the condenser body under the premise of ensuring the heat exchange area, the condenser is usually designed as an inwardly folded or inwardly folded structure, as disclosed in Chinese patents No. 202410511949.1 and 202322669089.8.

[0007] However, the condenser has the following problems: 1. The circular or spiral structure of the condenser inner roll is arranged at the fan outlet, which causes certain interference to the flow field of the fan outlet. The high-speed airflow impacting the condenser inner roll part will generate a larger noise, which makes the working noise of the range hood larger, resulting in a decrease in user experience; 2. When the airflow of the fan outlet flows through the surface of the condenser, a boundary layer (also called a boundary layer) is generated, which is not conducive to heat transfer, reduces the heat transfer efficiency of the condenser surface, and ultimately adversely affects the refrigeration performance.

[0008] Therefore, further improvement is needed. Utility model content

[0009] The first technical problem to be solved by the utility model is to provide a condenser of a refrigeration range hood, which can reduce noise and improve heat transfer efficiency.

[0010] The second technical problem to be solved by the utility model is to provide a refrigeration range hood applying the condenser.

[0011] The utility model adopts the technical scheme for solving the first technical problem: a condenser of a refrigeration range hood, comprising a main body capable of conducting heat and a refrigerant channel arranged on the main body; the main body comprises a first part and a second part, the first part is in a hollow pipe shape and surrounds an exhaust smoke channel for smoke to pass through, and the second part is located in the space surrounded by the first part; characterized in that:

[0012] The main body is provided with a through hole penetrating through the wall thickness of the main body, so that the part of the main body provided with the through hole constitutes a noise reduction plate;

[0013] The second part is in direct contact with the first part, and the through hole is arranged on the second part; or the second part is located in the space surrounded by the first part, the second part is in a hollow pipe shape, the second part and the first part are indirectly contacted through heat-conducting fins, and the through hole is arranged on the fins.

[0014] By arranging the through hole, part of the main body in the exhaust smoke channel constitutes a microporous noise reduction plate. Since the through hole has a certain noise reduction effect, especially for low-frequency noise, part of the airflow noise can be eliminated, the noise of the range hood during operation is reduced, and the user experience is optimized. Due to the existence of the through hole, part of the airflow can pass through the through hole, eliminating the boundary layer existing on the original surface, increasing the heat transfer efficiency of the condenser; the increased heat transfer efficiency of the condenser can further miniaturize the condenser, making the overall machine size more compact; in addition, by arranging micropores on the condenser inner roll structure, the problem of reverse heat transfer of the condenser can be reduced, which is more conducive to improving the energy efficiency of the refrigeration system.

[0015] Preferably, in order to make the perforations play a noise reduction role and avoid oil dirt from blocking the perforations, the perforations are circular holes, the diameter of the perforations is d, and 1.5mm≤d≤3.5mm is satisfied.

[0016] Preferably, in order to have better noise reduction and heat exchange effects, the perforations are arranged in an array and have multiple perforations, the spacing between every two adjacent perforations in each row is h1, the spacing between every two adjacent perforations in each column is h1, and 1.5d≤h1≤5.0d is satisfied.

[0017] In order to ensure the pressure bearing capacity of the condenser, the minimum distance between the edge of the perforation closest to the refrigerant channel and the edge of the adjacent refrigerant channel is h2, and h2≥2.0d is satisfied.

[0018] According to one aspect of the present application, the second part is in direct contact with the first part, and the second part is formed by inwardly curling the wall surface of the first part.

[0019] According to another aspect of the present application, the second part is in indirect contact with the first part, the second part is arranged in the first part in a spaced manner, the first part and the second part are both cylindrical, and the fins have multiple fins and are arranged in a radial manner.

[0020] In order to achieve better heat exchange effects while taking into account the adverse effect of the number of fins 244 on the smoke exhaust resistance of the range hood, the number of fins is n, and n≤15 is satisfied.

[0021] In order to ensure the heat transfer efficiency of the second part, the diameter of the cross section of the first part is D1, the diameter of the cross section of the second part is d1, and 0.2≤d1 / D1≤0.5 is satisfied.

[0022] In order to further improve the noise reduction and heat exchange effects, the perforations are also provided on the second part.

[0023] Preferably, in order to reduce the heat conduction path and improve the heat exchange efficiency, a gap is formed in the wall part of the main body, and the gap directly constitutes the refrigerant channel.

[0024] The present application solves the second technical problem by adopting the technical scheme of a refrigeration range hood, which comprises an oil smoke suction assembly and a refrigeration assembly, the oil smoke suction assembly comprises a first shell and a main fan arranged in the first shell, and the refrigeration assembly comprises the condenser as described above, and the condenser is connected with the first shell and arranged at the air outlet of the main fan.

[0025] Further, the condenser is arranged vertically, and the center line of the perforation is inclined relative to the horizontal plane, so that the oil dirt in the perforation can flow out, thereby avoiding the blockage of the perforation.

[0026] Further, the first shell comprises a fume hood and a fan frame arranged on the fume hood, and the main fan is arranged in the fan frame.

[0027] The refrigeration assembly further comprises a second shell, a compressor, an evaporator and a cooling fan, the cooling fan is used for sucking air outside the second shell to exchange heat with the evaporator and blow out the cooled air, the second shell is arranged at the outer periphery of the fan frame of the first shell and is higher than the fan frame, and the compressor, the evaporator, the condenser and the cooling fan are arranged in the second shell and correspond to the upper side of the fan frame.

[0028] The refrigeration assembly further comprises an air outlet pipe connected with the air outlet of the cooling fan, and the second shell is provided with an air outlet at a position corresponding to the bottom of the front side of the fan frame, so that the cooled air can be blown to the user at a proper position, and the installation is facilitated without the need of opening a hole on the cabinet for the cooled air to blow out.

[0029] Further, in order to further improve the heat exchange efficiency, the refrigeration assembly further comprises a second shell, a compressor and an evaporator, the second shell is provided with a partition plate, so that the second shell is divided into a cold chamber and a hot chamber, the compressor and the condenser are arranged in the hot chamber, and the evaporator and the cooling fan are arranged in the cold chamber.

[0030] The refrigeration assembly further comprises a heat dissipation fan and a heat dissipation pipe, the heat dissipation pipe is connected between the compressor and the first shell, the heat dissipation fan is arranged in the heat dissipation pipe, and the heat dissipation fan is used for sucking air outside the second shell to exchange heat with the compressor and blowing the heated air into the first shell.

[0031] Compared with the prior art, the advantages of the utility model lie in that: by setting the perforations, part of the main body in the smoke exhaust channel constitutes a microporous noise reduction plate, because the perforations have a certain sound attenuation effect, especially for low-frequency noise, part of the airflow noise can be eliminated, the noise during the operation of the extractor hood is reduced, and the user experience is optimized; due to the presence of the perforations, part of the airflow can pass through the perforations, the boundary layer existing on the original surface is eliminated, the heat transfer efficiency of the condenser is increased, the size of the condenser can be further reduced, and the size of the whole machine is more compact; in addition, by setting the micropores on the inner coiled structure of the condenser, the problem of reverse heat transfer of the condenser can also be reduced, and the refrigeration system is more energy-efficient. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is a mounting sectional front view of the extractor hood of the first embodiment of the utility model;

[0033] Figure 2 It is a mounting sectional side view of the extractor hood of the first embodiment of the utility model;

[0034] Figure 3 Fig. 1 is a schematic view of an extractor hood and exhaust duct according to a first embodiment of the present application;

[0035] Figure 4 Fig. 2 is a sectional view of the extractor hood and exhaust duct according to the first embodiment of the present application;

[0036] Figure 5 Fig. 3 is a schematic view of a condenser of the extractor hood according to the first embodiment of the present application;

[0037] Figure 6 Fig. 4 is an expanded schematic view of the condenser of the extractor hood according to the first embodiment of the present application;

[0038] Figure 7 Fig. 5 is a schematic view of an alternative embodiment of the condenser of the extractor hood according to the first embodiment of the present application; Figure 6

[0039] Figure 8 Fig. 6 is a schematic view of an alternative embodiment of the micro-hole layout of the condenser of the extractor hood according to the first embodiment of the present application; Figure 7

[0040] Figure 9 Fig. 7 is a schematic view of an alternative embodiment of the micro-hole layout of the condenser of the extractor hood according to the first embodiment of the present application; Figure 6

[0041] Figure 10 Fig. 8 is a partial sectional view of the condenser of the extractor hood according to the first embodiment of the present application;

[0042] Figure 11 Fig. 9 is a schematic view of a condenser of an extractor hood according to a second embodiment of the present application;

[0043] Figure 12 Fig. 10 is a sectional view of the condenser of the extractor hood according to the second embodiment of the present application. DETAILED DESCRIPTION

[0044] Embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements having the same or similar functions.

[0045] ​​​In the description of the utility model, it is understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, since the disclosed embodiments of the utility model can be arranged in different directions, so these directional terms are only as an illustration and should not be regarded as a limitation, for example, "upper", "lower" are not necessarily limited to the direction opposite or consistent with the direction of gravity. In addition, the features limited by "first", "second" can explicitly or implicitly include one or more features.

[0046] Embodiment one

[0047] Reference Figures 1-6 A kind of refrigeration range hood, including suction oil smoke component and refrigeration component, wherein, suction oil smoke component includes first shell 11 and the main fan 12 of setting in first shell 11, in the embodiment, it is the form of top suction, first shell 11 includes smoke collecting hood 111 and fan frame 112 of setting in smoke collecting hood 111, main fan 12 is set in fan frame 112.

[0048] Refrigeration component includes second shell 21, compressor 22, evaporator 23, condenser 24 and cooling fan 25, wherein second shell 21 is spaced apart and is set in the outer periphery of fan frame 112 of first shell 11, and is higher than fan frame 112. Wherein compressor 22, evaporator 23, condenser 24 and cooling fan 25 can be set in second shell 21, and the passage of refrigerant is formed between compressor 22, evaporator 23 and condenser 24. The working principle of refrigeration component is same as prior art. The compressor 22, evaporator 23, condenser 24 and cooling fan 25 described above can be set above fan frame 112. Partition 212 can be set in second shell 21, so that the second shell 21 is divided into cold chamber and hot chamber, wherein compressor 22 and condenser 24 are set in hot chamber, and evaporator 23 and cooling fan 25 are set in cold chamber.

[0049] The top of the second shell 21 can be attached to the ceiling 100 of the kitchen, and the return air inlet 101 is formed in the ceiling 100. The top of the second shell 21 can be provided with air inlets (not shown) corresponding to the return air inlets 101, so that the return air inlets 101 and the second shell 21 are in fluid communication, thereby allowing air outside the second shell 21 to enter the second shell 21. In this embodiment, the return air inlets 101 have two, one of which corresponds to the hot chamber, especially the compressor 22, and the other corresponds to the cold chamber, especially the cold air fan 25.

[0050] The refrigeration assembly further comprises an air outlet pipe 26 connected to the air outlet of the cold air fan 25 and extending to the front top of the smoke hood 111 (the front bottom of the fan stand 112), and the second shell 21 is provided with a cold air outlet 211 at this position. Components can be provided at the cold air outlet 211 to facilitate uniform air outlet, similar to the air outlet components of an air conditioner, such as the air outlet device disclosed in the Chinese patent with application number 202321674207.8.

[0051] After the room temperature air is sucked into the second shell 21 by the cold air fan 25 from the return air inlets 101 and the top of the second shell 21, it exchanges heat with the evaporator 23. The cooled air flows along the air outlet pipe 26 and is finally blown forward from the cold air outlet 211, thereby achieving refrigeration.

[0052] The evaporator 23 is provided with a condensate water box 231 below for receiving condensate water of the evaporator 23. The bottom of the second shell 21 is provided with a water storage box 27 on the side of the fan stand 112. The condensate water box 231 and the water storage box 271 are in fluid communication through a water guide pipe 232. The water storage box 27 can be taken out of the second shell 21, such as a door that can be opened and closed can be provided on the wall of the second shell 21 corresponding to the water storage box 27, or the water storage box 27 can be provided in a pull-out manner. When the water level in the water storage box 27 reaches a limit (a water level sensor can be provided for liquid level detection), the user is reminded to clean up, and the refrigeration assembly stops refrigeration. The air outlet pipe 26 and the water storage box 27 can be provided on opposite sides (left and right sides) of the fan stand 112.

[0053] The refrigeration assembly further comprises a heat dissipation fan 281 and a heat dissipation duct 282, which is connected between the compressor 22 and the fan frame 112, such as the bottom of the compressor 22, and the side of the fan frame 112, and the heat dissipation duct 282 is in fluid communication with the fan frame 112. The heat dissipation fan 281 is arranged in the heat dissipation duct 282, and the air inlet thereof is opposite to the compressor 22, so that the outdoor air enters the second shell 21 through the air return port 101 and the top of the second shell 21, exchanges heat with the compressor 22, and the hot air after heat exchange is blown into the fan frame 112 through the heat dissipation fan 281 and then discharged through the main fan 12 of the oil fume exhaust assembly. The heat dissipation duct 282 is provided with a check baffle 283, which functions as a one-way valve, allowing the hot air after heat exchange to blow into the fan frame 112, but preventing the air flow from flowing back from the fan frame 112 to the heat dissipation duct 282, and also preventing the oil fume in the fan frame 112 from entering the heat dissipation duct 282.

[0054] The condenser 24 comprises a main body 241 and a refrigerant passage 242, the main body 241 is in the shape of a hollow duct, and the refrigerant passage 242 is formed in the wall of the main body 241. The main body 241 comprises two layers of heat-conducting plates 2411, and the refrigerant passage 242 is formed directly between the two layers of heat-conducting plates 2411 without laying additional pipes, and the two layers of heat-conducting plates 2411 only have a gap at the position where the refrigerant passage 242 is formed, i.e. the gap constitutes the refrigerant passage 242, and the two layers of heat-conducting plates 2411 are attached at other positions. The forming method of the refrigerant passage 242 of the condenser 24 described above is a prior art, and for details, please refer to the prior application of the applicant mentioned in the background, which will not be described here.

[0055] The refrigerant passage 242 has an inlet 2421 for the refrigerant from the compressor 22 to enter and an outlet 2422 for the refrigerant to flow out (usually to the throttling element). In this embodiment, it is shown that the refrigerant flows in three paths after entering the inlet 2421. Alternatively, there can be only one path, two paths or more.

[0056] In the oil fume flow path, the condenser 24 is arranged downstream of the main fan 12, which can be directly connected to the air outlet of the main fan 12, or connected to the main fan 12 through an air outlet cover (not shown, which is a prior art). The condenser 24 is connected downstream of the exhaust duct 3. That is, the space surrounded by the inner layer of the heat-conducting plate 2411 of the first part 2413 (to be described below) of the main body 241 constitutes an exhaust passage 2412 for the oil fume discharged by the main fan 12 before reaching the public drain or being discharged into the room.

[0057] In the embodiment, the condenser 24 is directly arranged at the air outlet of the main fan 12 and vertically arranged. The main body 241 comprises a first part 2413 which is in the shape of a hollow pipe with two open ends (the condenser 24 is vertically arranged, i.e. the two ends are open upward and downward), preferably a cuboid. Since the heat dissipation area of the first part 2413 is not enough for the light, the first part 2413 is crimped inside. That is, the main body 241 further comprises a second part 2414 which is in an integral structure with the first part 2413. Here, the integral structure means that the first part 2413 and the second part 2414 can be integrally formed, or the first part 2413 and the second part 2414 can be manufactured into an integral structure by welding or the like, or the first part 2413 and the second part 2414 can be connected by direct or indirect contact. The second part 2414 is located inside the space surrounded by the first part 2413, and the second part 2414 extends inwardly from the wall of the first part 2413 (here, "inwardly" only means that the crimping is inside the space surrounded by the first part 2413, and does not mean the starting point and the crimping direction during manufacturing). The height direction of the second part 2414 is consistent with that of the first part 2413. In the embodiment, the height directions of the first part 2413 and the second part 2414 are consistent, i.e. both are vertical directions. In the embodiment, the second part 2414 is in the shape of a spiral column, and can also be crimped into an elliptical roll, a back-shaped roll or other forms of rolls.

[0058] The heat-conducting plates 2411 of the inner layer of the first part 2413 are towards the inner side wall surface of the smoke exhaust channel 2412 and the outer side wall surface of the heat-conducting plates 2411 of the outer layer away from the inner layer heat-conducting plates 2411, which all constitute heat dissipation surfaces. The inner side heat dissipation surface dissipates heat through the cooking fume passing through the smoke exhaust channel 2412, and the outer side heat dissipation surface contacts the room temperature air entering the second shell 21 from the kitchen indoor environment during operation, and can also achieve a certain degree of heat dissipation. The heat-conducting plates 2411 of the second part 2414 are in contact with the cooking fume on any surface, have a large heat dissipation area and good heat dissipation effect.

[0059] In addition, the first part 2413 in the shape of an outer cuboid can facilitate the arrangement of the main body 241, and in particular can enable the main body 241 to be directly arranged at the air outlet of the main fan 12 (both are rectangular cross sections which can be matched). The condenser 24 is at least partially crimped inside as a whole, has a larger contact area with the cooking fume under the same volume, and can further improve the overall heat exchange efficiency. In addition, since the wind speed at the center of the condenser 24 is fast, heat dissipation can be faster.

[0060] The two heat-conducting plates 2411 can be hot-rolled into a shape (see Figure 6 The second part 2414 is formed by rolling the first part 2413 into a spiral shape, and the remaining part is rolled into a cuboid and then spliced and welded.

[0061] The bottom of the first part 2413 of the main body 241 is provided with an outwardly bent flange (not shown) for fixing to the top of the first shell 11 and directly communicating with the air outlet of the main fan 12. The flange can be fixed to the first shell 11 by screws. In this way, the heat of the main body 241 can be conducted to the first shell 11 and the metal connecting parts of the volute of the main fan 12 through heat conduction, which is equivalent to a wider heat transfer area affected by air flow and better heat dissipation effect. In order to ensure that the heat of the main body 241 is better conducted to the first shell 11, the flange of the condenser 24 and the top of the fan frame 112 of the first shell 11 can be coated with heat-conducting glue, so that the heat transfer is better and the connection after extrusion is sealed better and does not leak oil fume.

[0062] The upper end of the first part 2413 of the main body 241 can be connected to the circular smoke exhaust duct 3 through a square-to-round adapter 4, which is similar to the inverted air outlet cover commonly used in the art, and the main body 241 and the adapter 4 can be fixed by screws.

[0063] Referring to Figures 5-9 A plurality of perforations 2415 are formed in the second part 2414 of the main body 241, and the perforations 2415 are preferably circular holes. The perforations 2415 penetrate the second part 2414 in the thickness direction, i.e., they penetrate the two heat-conducting plates 2411 of the second part 2414. The cross section of the perforations 2415 is circular and in the form of micro-holes. In addition, in order to increase the flowability of oil stains, the perforations 2415 can also be arranged obliquely, i.e., the center line of the perforations 2415 and the horizontal plane have a certain angle, so as to facilitate the flow of oil stains. The position of the perforations 2415 avoids the refrigerant passage 242, i.e., the perforations 2415 and the refrigerant passage 242 are arranged in a staggered manner, and the perforations 2415 do not pass through the refrigerant passage 242.

[0064] By providing the perforations 2415, the second part 2414 constitutes a micro-perforated noise reduction plate. Since the micro-perforated noise reduction plate is based on the principle of micro-perforated plate sound absorption, it needs to meet the requirements of sound impedance rate, relative sound resistance, relative sound mass, sound absorption coefficient and sound absorption frequency band, the diameter of the perforations 2415 is d and satisfies 1.5mm≤d≤3.5mm, thereby preventing the perforations from being blocked by oil stains after use. Referring to Figure 7, the plurality of perforations 2415 are arranged in an array, the distance between any two adjacent perforations 2415 in a row (the center-to-center distance of two perforations 2415) is h1, the distance between any two adjacent perforations 2415 in a column (the center-to-center distance of two perforations 2415) is also h1, and 1.5d≤h1≤5.0d is satisfied. See Figure 8 , for an alternative embodiment of the arrangement of perforations 2415, the rows of the array are inclined relative to the horizontal direction, and the columns of the array are inclined relative to the vertical direction. The perforations 2415 can also be arranged in other ways that can serve to reduce noise.

[0065] To ensure that the pressure-bearing capacity of the condenser 24 is not affected by the perforations 2415, the minimum distance between the edge of the perforation 2415 closest to the refrigerant channel 242 and the edge of the adjacent refrigerant channel 242 is h2, and h2≥2.0d is satisfied. Because of the way the refrigerant channels 242 are arranged, the portion of the body 241 corresponding to the refrigerant channels 242 is convex, so in Figure 9 , the edge of the convex portion is taken as equivalent to the edge of the refrigerant channel 242 when the distance is shown.

[0066] Because the perforations 2415 have a certain noise reduction effect, especially for low-frequency noise, some of the airflow noise can be eliminated, reducing the noise of the range hood when it is operating, and optimizing the user experience. Because of the presence of the perforations 2415, some of the airflow can pass through the perforations 2415, eliminating the boundary layer that exists on the original surface, increasing the heat transfer efficiency of the condenser 24; increasing the heat transfer efficiency of the condenser 24 can further miniaturize the condenser 24, making the overall machine more compact.

[0067] In addition, by opening micro-holes on the coiled structure inside the condenser 24, the problem of reverse heat transfer of the condenser 24 can also be reduced. See Figure 6 , where arrow A shows the direction of flow of the refrigerant. Because the inlet 2421 of the refrigerant channel 242 of the condenser 24 is connected to the compressor 22, the refrigerant entering the condenser 24 from the exhaust port of the compressor 22 has a relatively high temperature, and the outlet 2422 of the refrigerant channel 242 is connected to the throttling element, at which time the temperature of the refrigerant is relatively low due to heat release. Because of the temperature difference, and because the condenser 24 is made of a metal material with good thermal conductivity, there is a problem of heat transfer from the high-temperature side to the low-temperature side, and there is inevitably a problem of reverse heat transfer, which causes the temperature of the refrigerant at the outlet of the condenser 24 to have a tendency to rise. Opening perforations 2415 in the portion of the body 241 located between the inlet and the outlet of the refrigerant channel 242 can reduce the amount of reverse heat transfer (the heat transfer path is shown by arrow B in Figure 6 , which is more conducive to improving the energy efficiency of the refrigeration system.

[0068] Embodiment Two

[0069] See Figure 11 and Figure 12In the embodiment, the second part 2414 is arranged in the first part 2413 at intervals, and the two parts are not in direct contact. The shapes of the two parts are not limited, and both are in the shape of a hollow pipe. Preferably, the first part 2413 and the second part 2414 are both in the shape of a hollow cylinder. At this time, the first part 2413 and the second part 2414 can be connected to the air outlet of the main fan 12 through an adapter and directly connected to the smoke duct 3.

[0070] The condenser 24 further comprises a heat-conducting fin 244 connected between the first part 2413 and the second part 2414, and the perforations 2415 are arranged on the fin 244. In order to achieve better heat exchange effect while taking into account the adverse effect of the number of fins 244 on the smoke exhaust resistance of the range hood, the number n of fins 244 is preferably ≤15, and the fins 244 are arranged in a radial manner.

[0071] In order to ensure the heat transfer efficiency of the center-strengthened second part 2414, the diameter d1 of the cross section of the second part 2414 is preferably 0.2≤d1 / D1≤0.5, where D1 is the diameter of the cross section of the first part 2413.

[0072] In addition, the perforations 2415 can also be arranged on the second part 2414 as needed.

[0073] In the above two embodiments, the condenser 24 is in the shape of a blowout, and alternatively, the refrigerant pipe of the condenser 24 can also be in a structure independent of the main body 241, and is spirally wound on the outer wall of the main body 241, as disclosed in the Chinese patent with the application number 202110029969.1 in the background art.

[0074] The "fluid communication" referred to in the utility model means the spatial positional relationship between two components or parts (hereinafter collectively referred to as the first part and the second part), i.e. the fluid (gas, liquid or mixture of the two) can flow or / and be transported from the first part to the second part along the flow path. It can be directly connected between the first part and the second part, or indirectly connected between the first part and the second part through at least one third party, which can be a fluid passage such as a pipe, a channel, a conduit, a flow guide, a hole, a groove, etc., or a chamber allowing fluid to flow or a combination thereof.

Claims

1. A condenser of an oil-suction range hood, comprising a main body (241) capable of conducting heat and a refrigerant passage (242) provided on the main body (241); the main body (241) comprises a first portion (2413) and a second portion (2414), the first portion (2413) is in a hollow pipe shape and encloses an exhaust passage (2412) for oil fume to pass through, and the second portion (2414) is located in the space enclosed by the first portion (2413); characterized in that: the main body (241) is provided with perforations (2415) penetrating the wall thickness of the main body (241), so that the part of the main body (241) provided with the perforations (2415) is configured as a noise reduction plate; the second portion (2414) is in direct contact with the first portion (2413), and the perforations (2415) are provided on the second portion (2414); or the second portion (2414) is located in the space enclosed by the first portion (2413), the second portion (2414) is in a hollow pipe shape, the second portion (2414) is in indirect contact with the first portion (2413) through heat-conducting fins (244), and the perforations (2415) are provided on the fins (244). The perforations (2415) are circular holes, the diameter of the perforations (2415) is d, and 1.5mm≤d≤3.5mm is satisfied. The perforations (2415) are arranged in an array, the spacing between every two adjacent perforations (2415) in each row is h1, the spacing between every two adjacent perforations (2415) in each column is h1, and 1.5d≤h1≤5.0d is satisfied.

2. The condenser of claim 1, wherein: The minimum distance between the edge of the perforation (2415) closest to the refrigerant passage (242) and the edge of the adjacent refrigerant passage (242) is h2, and h2≥2.0d is satisfied.

3. The condenser of claim 2, wherein: The second portion (2414) is in direct contact with the first portion (2413), and the second portion (2414) is formed by inwardly curling the wall surface of the first portion (2413).

4. The condenser of claim 2, wherein: The second portion (2414) is in indirect contact with the first portion (2413), the second portion (2414) is arranged in the first portion (2413) at intervals, the first portion (2413) and the second portion (2414) are both in a cylindrical shape, and the fins (244) are arranged in a radial shape.

5. The condenser of a refrigeration hood according to any one of claims 1 to 4, characterized in that: The number of the fins (244) is n, and n≤15 is satisfied.

6. The condenser of a refrigeration hood according to any one of claims 1 to 4, characterized in that: The diameter of the cross section of the first portion (2413) is D1, the diameter of the cross section of the second portion (2414) is d1, and 0.2≤d1 / D1≤0.5 is satisfied.

7. The condenser of a refrigerant extraction hood according to claim 6, characterized in that: The perforations (2415) are also provided on the second portion (2414).

8. The condenser of claim 6 wherein: A gap is formed in the wall portion of the main body (241), and the gap directly constitutes the refrigerant passage (242).

9. The condenser of a refrigerant extraction hood according to claim 6, characterized in that: The refrigeration assembly comprises the condenser according to any one of claims 1-10, the condenser is connected with a first shell (11) and is arranged at the air outlet of a main fan (12).

10. The condenser of a refrigerant extraction hood according to any one of claims 1 to 4, characterized in that: ​ 11. A refrigeration range hood comprising an extraction hood assembly and a refrigeration assembly, said extraction hood assembly comprising a first housing (11) and a main fan (12) arranged within the first housing (11); characterized by the fact that: ​ 12. The refrigerant oil extraction hood according to claim 11, characterized in that: The condenser is arranged vertically, and the center line of the perforation (2415) is inclined relative to the horizontal plane.

13. The oil-exhaust hood according to claim 11, characterized in that: The first shell (11) comprises a fume hood (111) and a fan rack (112) arranged above the fume hood (111), and the main fan (12) is arranged in the fan rack (112); The refrigeration assembly further comprises a second shell (21), a compressor (22), an evaporator (23) and a cooling fan (25), the cooling fan (25) is used for sucking air outside the second shell (21) to exchange heat with the evaporator (23) and blow out the cooled air, the second shell (21) is arranged at the outer periphery of the fan rack (112) of the first shell (11) and is higher than the fan rack (112), and the compressor (22), the evaporator (23), the condenser and the cooling fan (25) are arranged in the second shell (21) and correspond to the upper side of the fan rack (112). The refrigeration assembly further comprises an air outlet pipe (26) connected with the air outlet of the cooling fan (25), and the second shell (21) is provided with an air outlet (211) at a position corresponding to the front bottom of the fan rack (112).

14. The oil-extraction range hood according to claim 11, characterized in that: The refrigeration assembly further comprises a second shell (21), a compressor (22) and an evaporator (23), the second shell (21) is provided with a partition plate (212) to divide the second shell (21) into a cold chamber and a hot chamber, the compressor (22) and the condenser are arranged in the hot chamber, and the evaporator (23) and the cooling fan (25) are arranged in the cold chamber. The refrigeration assembly further comprises a cooling fan (281) and a cooling pipeline (282), the cooling pipeline (282) is connected between the compressor (22) and the first shell (11), the cooling fan (281) is arranged in the cooling pipeline (282), and the cooling fan (281) is used for sucking air outside the second shell (21) to exchange heat with the compressor (22) and blowing the heated air into the first shell (11).

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