Refrigeration range hood

Abstract

The utility model discloses a refrigeration extractor hood which comprises a first shell and a second shell arranged below the first shell, a fan system is arranged on the inner side of the second shell, and the fan system comprises a fan system input end and a fan system output end. The second shell is provided with a smoke suction port in fluid communication with the input end of the fan system, the first shell is internally provided with a condenser which is located on the downstream portion of the fan system and can utilize exhausted air at the output end of the fan system to conduct heat dissipation, and the first shell is provided with an air inlet capable of leading in air in a kitchen. The air inlet is in fluid communication with the input end of the fan system, a first air inlet channel is formed between the air inlet and the input end of the fan system, the smoke suction port and the input end of the fan system form a second air inlet channel, and the first air inlet channel and the second air inlet channel are alternatively communicated.

Description

TECHNICAL FIELD

[0001] The utility model relates to an oil fume purification device, especially a refrigeration oil fume extractor. BACKGROUND

[0002] With the improvement of material life level, people's requirement for kitchen environment is higher and higher, people need to use the stove during cooking, and a large amount of heat will be generated in the kitchen, which leads to the increase of the temperature of the whole space and the decrease of the comfort of the environment. Therefore, the oil fume extractor integrated with the refrigeration assembly appears.

[0003] For example, the oil fume extractor with heat exchange function disclosed in the Chinese utility model patent with application number 202222837398.7 comprises a casing, an oil fume extractor fan, a compressor, a condenser and an evaporator are installed in the casing, an exhaust cavity and an air outlet cavity are provided in the casing and are isolated from each other, the oil fume extractor fan and the condenser are arranged in the exhaust cavity, the evaporator is arranged in the air outlet cavity, an air outlet fan is also installed in the air outlet cavity, and a heat exchanger is further included, the heat exchanger has a first heat exchange part and a second heat exchange part, the first heat exchange part is arranged in the exhaust cavity, and the second heat exchange part is arranged in the air outlet cavity.

[0004] The above-mentioned patent utilizes the fan of the oil fume extractor to dissipate heat from the condenser, so that the oil fume extractor needs to open the smoke baffle to suck in indoor air to dissipate heat from the condenser as long as the refrigeration assembly is working. During the stages of preparing food and cleaning, or at the moment of cooking, the smoke baffle is usually located at a height range of 1.2 meters to 1.5 meters indoors, so the oil fume extractor mainly sucks in cold air with relatively low temperature in the middle and lower parts of the room, which leads to poor refrigeration effect, serious decline of the energy efficiency of the refrigeration module and poor user experience, etc. UTILITY MODEL CONTENTS

[0005] The technical problem to be solved by the utility model is to provide an oil fume extractor which can introduce air from the upper part of the kitchen to dissipate heat from the condenser during the period of preparing food and non-cooking.

[0006] The utility model discloses a technical scheme that solves the above technical problem is as follows: a kind of refrigeration oil extraction range hood, including first shell and second shell being arranged below first shell, the inside of second shell is provided with fan system, the fan system includes fan system input end and fan system output end, suction port that is fluidly connected with fan system input end is opened on second shell, condenser is arranged in first shell and located downstream of fan system and can utilize exhaust at fan system output end to radiate heat, it is characterized by: air inlet that can introduce air in kitchen is arranged on first shell, air inlet and fan system input end are fluidly connected, first air inlet passage is formed between air inlet and fan system input end, suction port and fan system input end form second air inlet passage, first air inlet passage and second air inlet passage are alternatively connected.

[0007] By setting air inlet on first shell, when using refrigeration function during food preparation and non-fire cooking, the air with relatively high temperature in the upper part of kitchen is introduced to condenser to radiate heat, the loss of cold energy in kitchen is reduced, the system refrigeration efficiency is improved, and better refrigeration experience is realized.

[0008] In order to realize the heat dissipation of the condenser during non-cooking and cooking, a valve capable of connecting or closing the first air inlet passage is arranged between the first shell and the second shell, and the range hood further comprises a smoke baffle capable of opening or closing the suction port, when the smoke baffle closes the suction port and closes the second air inlet passage, the valve opens the first air inlet passage, when the smoke baffle opens the suction port and connects the second air inlet passage, the valve closes the first air inlet passage.

[0009] In order to guide the air in the upper part of the kitchen, the first shell is located below the ceiling, the ceiling comprises a first return air inlet capable of guiding the air below the ceiling to above the ceiling and a second return air inlet capable of guiding the air above the ceiling to the air inlet, and the air inlet is located at the top of the first shell.

[0010] In order to make full use of the upper space of the ceiling, realize more reasonable waterfall air supply experience, make the air supply cover a wider area, and make the noise source away from the user, the refrigeration range hood further comprises a cooling fan arranged in the first shell and an air supply assembly for discharging the cooling air of the cooling fan to the kitchen, the cooling fan comprises a cooling fan output end, the air supply assembly comprises an air supply pipe and an air supply piece arranged on the ceiling, and the air supply pipe is connected between the cooling fan output end and the air supply piece.

[0011] In order to avoid the backflow of the cooling air output by the air supply piece into the first return air inlet, the first return air inlet is arranged separately from the air supply piece.

[0012] In order to make the refrigerant flowing inside the refrigerant channel be fully radiated, improve the overall heat exchange efficiency, the condenser comprises a main body capable of conducting heat and a refrigerant channel arranged on the main body, the main body is in the form of a pipe, the refrigerant channel is directly formed inside the wall of the main body, and the space surrounded by the main body of the condenser constitutes a smoke exhaust channel.

[0013] In order to improve the radiating efficiency, the condenser further comprises a hollow radiating pipe through which the oil fume can pass, the radiating pipe is arranged inside the space surrounded by the main body and is spaced apart from the main body, and a heat conducting sheet is connected between the radiating pipe and the main body.

[0014] Preferably, in order to ensure the heat conduction efficiency, the wall of the main body comprises two layers of heat conducting plates, and the gap between the two layers of heat conducting plates constitutes the refrigerant channel.

[0015] In order to arrange the condenser, the main body of the condenser is arranged at the output end of the fan system.

[0016] Compared with the prior art, the advantages of the condenser are as follows: the air inlet is arranged on the top of the first shell, the refrigeration function is used during the preparation of dishes and the non-fire cooking period, the smoke baffle is in the closed state, the valve is opened, the fan system operates at the set speed, the air with relatively high temperature at the upper part of the kitchen is introduced to radiate the condenser, and then is discharged to the outdoor or the public flue through the smoke exhaust pipe, the loss of cold energy in the kitchen is further reduced, the system refrigeration efficiency is improved, and better refrigeration experience is realized. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the flow of the radiating airflow of the condenser when the smoke baffle of the range hood of the embodiment of the utility model is opened;

[0018] Figure 2 It is a side sectional view when the smoke baffle of the range hood of the embodiment of the utility model is opened;

[0019] Figure 3 It is a schematic diagram of the flow of the radiating airflow of the condenser when the smoke baffle of the range hood of the embodiment of the utility model is closed;

[0020] Figure 4 It is a side sectional view when the smoke baffle of the range hood of the embodiment of the utility model is closed;

[0021] Figure 5 It is a schematic diagram of the condenser of the refrigeration assembly of the range hood of the first embodiment of the utility model;

[0022] Figure 6 It is a sectional view of the condenser; Figure 5

[0023] Figure 7 It is​Figure 5 An expanded schematic view of the condenser of the first embodiment of the present application

[0024] Figure 8 An expanded schematic view of the condenser of the first embodiment of the present application Figure 5 An expanded schematic view of the condenser of the first embodiment of the present application

[0025] Figure 9 An expanded schematic view of the condenser of the first embodiment of the present application Figure 5 An expanded schematic view of the condenser of the first embodiment of the present application

[0026] Figure 10 An expanded schematic view of the condenser of the first embodiment of the present application

[0027] Figure 11 An expanded schematic view of the condenser of the first embodiment of the present application DETAILED DESCRIPTION

[0028] The present application will be further described below in conjunction with the embodiments of the drawings.

[0029] In the description of the present application, it is to be 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 based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, since the embodiments disclosed by the present application can be arranged in different directions, so these terms indicating the direction are only as an illustration and should not be regarded as a limitation, such as "upper", "lower" are not necessarily limited to the direction opposite or consistent with the direction of gravity. In addition, the features defined as "first", "second" can explicitly or implicitly include one or more of the features.

[0030] Referring to Figures 1-4 A refrigeration range hood, comprising a first shell 1 and a second shell 2 arranged below the first shell 1.

[0031] The inner side of the second shell 2 is provided with a fan system 3, and the fan system 3 comprises a fan system input end 31 and a fan system output end 32. The second shell 2 is provided with a smoke suction port 21 in fluid communication with the fan system input end 31, and the first shell 1 is provided with a condenser 4 downstream of the fan system 3 and capable of dissipating heat by using the exhaust gas at the fan system output end 32.

[0032] The refrigeration range hood further comprises an exhaust pipe 9 downstream of the condenser 4. The condenser 4 and the exhaust pipe 9 are connected by an adapter 200. The end of the exhaust pipe 9 is provided with a fireproof valve 300.

[0033] The first housing 1 is provided with an air inlet 11 for introducing air into the kitchen, especially air from the upper part. The air inlet 11 is in fluid communication with the fan system input end 31. The air inlet 11 and the fan system input end 31 form a first air inlet channel, and the smoke suction port 21 and the fan system input end 31 form a second air inlet channel. The first air inlet channel and the second air inlet channel can be selectively connected (i.e., only one of the two channels is connected at the same time). When cooking, the second air inlet channel is connected, and when preparing food or cooking without fire, the first air inlet channel is connected.

[0034] The first housing 1 and the second housing 2 are provided with a valve 5 that can connect or close the first air inlet channel. The valve 5 is arranged inside the first housing 1, and the valve 5 can connect or close the inside of the first housing 1 and the second housing 2. The range hood further comprises a smoke baffle 6 that can open or close the smoke suction port 21. When the smoke baffle 6 closes the smoke suction port 21 and closes the second air inlet channel, the valve 5 opens the first air inlet channel. When the smoke baffle 6 opens the smoke suction port 21 and connects the second air inlet channel, the valve 5 closes the first air inlet channel.

[0035] The first housing 1 is located below the ceiling 100, and the ceiling 100 comprises a first return air inlet 1001 that can guide air below the ceiling 100 to above the ceiling 100, and a second return air inlet 1002 that can guide air above the ceiling 100 to the air inlet 11. The air inlet 11 is located at the top of the first housing 1. A first filter screen 400 is arranged at the first return air inlet 1001, and a second filter screen 500 is arranged at the air inlet 11. Preferably, the first filter screen 400 is a multi-layer composite filter screen, and the second filter screen 500 is a HEPA filter screen. The first filter screen 400 can pre-clean the air entering the first housing 1, reduce the chance of oil fume entering the second filter screen 500, and prolong the service life of the second filter screen 500 and the refrigeration module.

[0036] The refrigeration range hood further comprises a cooling air fan 7 arranged in the first shell 1 and an air supply assembly for discharging cooling air of the cooling air fan 7 to the kitchen. The cooling air fan 7 comprises a cooling air fan output end 71. The air supply assembly comprises an air supply pipe 81 and an air supply piece 82 arranged on the ceiling 100, and the air supply pipe 81 is connected between the cooling air fan output end 71 and the air supply piece 82. The air supply assembly is arranged above the ceiling 100, fully utilizes the upper space of the ceiling 100, realizes more reasonable waterfall air supply experience, makes the air supply cover a wider area, and the air outlet (noise source) of the air supply piece 82 is far away from the user, and the comprehensive use experience is better. Because the air supply assembly is arranged above the ceiling 100, the overall shape of the refrigeration range hood can be miniaturized and occupy a smaller space. The air supply piece 82 can also integrate lighting, air purification and other functions.

[0037] An evaporator 600 is further arranged in the first shell 1, and the evaporator 600 is arranged corresponding to the cooling air fan 7. Part of the gas entering the first shell 1 from the air inlet 11 is heated by the evaporator 600 and then returned to the indoor through the air supply assembly.

[0038] Referring to Figure 4 To avoid the backflow of the cooling air output by the air supply piece 82 into the first air return inlet 1001, the air supply piece 82 and the first air return inlet 1001 are arranged at a distance, so as to ensure that the air supply piece 82 and the first air return inlet 1001 have sufficient distance.

[0039] By arranging the air inlet 11 on the top of the first shell 1, during the cooking period without fire, the smoke baffle 6 is in a closed state, the valve 5 is opened, and the fan system 3 operates at a set speed. The air in the upper part of the kitchen with relatively high temperature is introduced to cool the condenser 4, and then discharged to the outdoor or the public flue through the exhaust pipe 9, thereby further reducing the loss of cold energy in the kitchen, improving the refrigeration efficiency of the system, and realizing better refrigeration experience. When the fire is on, the smoke baffle 6 is opened, the valve 5 is closed, and the oil smoke assembly sucks the gas generated during cooking and indoor air to cool the condenser 4.

[0040] The condenser 4 comprises a main body 41 and a refrigerant passage 42. The main body 41 is in a hollow pipe shape, preferably a cylindrical shape, and the refrigerant passage 42 is formed in the inside of the wall of the main body 41. The space surrounded by the main body 41 of the condenser 4 constitutes an exhaust passage 412. The main body 41 of the condenser 4 is arranged at the fan system output end 32.

[0041] Referring to Figure 5In the embodiment, the main body 41 is arranged longitudinally, and the refrigerant passage 42 is in the form of longitudinal parallel return flow. The refrigerant passage 42 is in the form of parallel return flow, specifically, the refrigerant passage 42 comprises at least three longitudinally extending first passages 423, a second passage 424 connected between one end of each of the two adjacent first passages 423, and a third passage 425 connected between the other end of the two adjacent first passages 423, the second passage 424 and the third passage 425 are arranged in staggered manner, that is, the second passage 424 and the third passage 425 extend reversely at the two ends of the same first passage 423, the second passage 424 extends to the direction of one of the adjacent first passages 423 of the first passage 423, and the third passage 425 extends to the direction of the other of the adjacent first passages 423 of the first passage 423. The second passage 424 is in the form of upwardly protruding curve, preferably arc, and the third passage 425 is in the form of downwardly protruding curve, preferably arc.

[0042] Referring to Figure 6 The wall of the main body 41 comprises two layers of heat-conducting plates 411, the refrigerant passage 42 is directly formed between the two layers of heat-conducting plates 411 without additional material, and the two layers of heat-conducting plates 411 only have a gap at the position where the refrigerant passage 42 is formed, that is, the gap between the two layers of heat-conducting plates 411 directly constitutes the refrigerant passage 42, and the two layers of heat-conducting plates 411 are attached at other positions. (The gap, such as bubbles, outside the refrigerant passage 42 due to processing problems should be regarded as a case without gap.) Optionally, the heat-conducting plate 411 is a metal plate, such as an aluminum plate, two aluminum plates are hot-rolled and profiled, the refrigerant passage 42 is formed by blowing between the two aluminum plates, and then the whole is rolled into the required shape. After hot rolling, the refrigerant in the refrigerant passage 42 can withstand a pressure of 2.3 MPa, and the refrigerant is in zero-gap contact with the heat-conducting plate 411, so the heat exchange efficiency is extremely high, and the surface temperature of the condenser is not higher than 50℃ in natural environment. In the existing air conditioner, the fins are commonly used, and the refrigerant and the heat-conducting material cannot be completely matched without gap, so the heat transfer is not smooth, which causes the condenser itself to be high in temperature, thereby affecting the overall refrigeration effect of the refrigeration assembly.

[0043] Therefore, the space surrounded by the heat-conducting plate 411 of the inner layer of the main body 41 constitutes the exhaust passage 412 through which the oil fume discharged by the fan system 3 passes before reaching the public flue, and the inner side wall surface of the heat-conducting plate 411 of the inner layer (i.e. the inner side wall surface 413 of the main body 41) and the outer side wall surface of the heat-conducting plate 411 of the outer layer (i.e. the outer side wall surface 414 of the main body 41) both constitute heat dissipation surfaces. The inner side heat dissipation surface is dissipated by the oil fume output from the output end 32 of the fan system, and the outer side heat dissipation surface contacts the air in the first shell 1 during operation and can also achieve a certain degree of heat dissipation. The room temperature air constitutes the heat dissipation fluid.

[0044] Refrigerant passage 42 has a refrigerant inlet 421 and a refrigerant outlet 422, see [link / reference] Figures 7-9 After the refrigerant enters through the refrigerant inlet 421, it can be divided into one, two, three, or even more channels. These channels then merge back into a single channel before flowing out through the refrigerant outlet 422. The refrigerant inlet 421 and the refrigerant outlet 422 can be located at the same end along the axial direction of the main body 41. Figure 7 (radial inflow and outflow), located at opposite ends of the main body 41 along its axial direction ( Figure 8 Alternatively, although located at the same end along the axis of the main body 41, axial inflow and outflow are achieved; see [reference]. Figure 9 The above. Figures 7-9 The arrows in the diagram indicate the flow path of the refrigerant.

[0045] See also Figure 5 and Figure 6 To further improve heat exchange efficiency, a heat dissipation pipe 43 can be installed inside the space enclosed by the main body 41 of the condenser 4. Preferably, it can be a hollow cylinder with open ends along the axial direction, located at the center of the main body 41, and preferably coaxial with the main body 41. A heat-conducting fin 44 is connected between the outer wall of the heat dissipation pipe 43 and the inner wall of the main body 41. There can be at least two heat-conducting fins 44, which are radially distributed. Both the heat dissipation pipe 43 and the heat-conducting fins 44 are made of thermally conductive materials, such as metal, and more preferably aluminum. Thus, the heat released by the refrigerant channel 42 can be conducted radially inward and outward through the heat-conducting fins 44 evenly distributed in the circumferential direction, and the heat dissipation is faster due to the high wind speed at the center of the heat dissipation pipe 43.

[0046] Example 2

[0047] See Figure 10 In this embodiment, the difference from Embodiment 1 is that the main body 41 is wound into a spiral column shape, and the heat dissipation pipe 43 and heat-conducting plate 44 are no longer provided. The refrigerant channel 42 can also be wound into a spiral shape on the wall of the main body 41 as shown in the figure.

[0048] Example 3

[0049] See Figure 11 In this embodiment, the difference from the first embodiment is that the main body 41 is a hollow cylinder, and the refrigerant channel 42 can be spirally coiled around the wall of the main body 41.

[0050] The condenser of this invention has advantages such as low wind resistance, high heat transfer efficiency, and non-blockage. Located at the rear end of the range hood fan, it achieves smoke exhaust and heat dissipation while having minimal impact on the range hood's performance, with virtually no adverse effects. The condenser's shape and structure are not limited to a cylindrical shape; it can also be rectangular or other shapes.

[0051] The "fluid communication" in the utility model refers to the spatial position relation between two components or parts (hereinafter collectively referred to as a first part, a second part), that is, fluid (gas, liquid or mixture of both) can flow or / and be transported from the first part to the second part along the flow path, which 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 pipeline, 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 refrigeration oil smoke extractor, comprising a first shell (1) and a second shell (2) arranged below the first shell (1), the inner side of the second shell (2) is provided with a fan system (3), the fan system (3) comprises a fan system input end (31) and a fan system output end (32), the second shell (2) is provided with a smoke suction port (21) in fluid communication with the fan system input end (31), the first shell (1) is provided with a condenser (4) downstream of the fan system (3) and capable of dissipating heat by exhaust gas at the fan system output end (32), characterized in that: The first shell (1) is provided with an air inlet (11) capable of introducing air in the kitchen, the air inlet (11) is in fluid communication with the fan system input end (31), the air inlet (11) and the fan system input end (31) form a first air inlet channel, the smoke suction port (21) and the fan system input end (31) form a second air inlet channel, and the first air inlet channel and the second air inlet channel are selectively communicated.

2. The oil-suction refrigerating range hood according to claim 1, characterized in that: The first shell (1) and the second shell (2) are provided with a valve (5) capable of communicating or closing the first air inlet channel, and the range hood further comprises a smoke baffle (6) capable of opening or closing the smoke suction port (21), when the smoke baffle (6) closes the smoke suction port (21) to close the second air inlet channel, the valve (5) opens the first air inlet channel, when the smoke baffle (6) opens the smoke suction port (21) to communicate the second air inlet channel, the valve (5) closes the first air inlet channel.

3. The oil-suction refrigerating range hood according to claim 1, characterized in that: The first shell (1) is located below the ceiling (100), the ceiling (100) comprises a first return air inlet (1001) capable of guiding air below the ceiling (100) to above the ceiling (100) and a second return air inlet (1002) capable of guiding air above the ceiling (100) to the air inlet (11), and the air inlet (11) is located at the top of the first shell (1).

4. The oil-extraction range hood according to claim 3, characterized in that: The refrigeration range hood further comprises a cooling fan (7) arranged in the first shell (1) and an air supply assembly for guiding the cooling air of the cooling fan (7) to the kitchen, the cooling fan (7) comprises a cooling fan output end (71), and the air supply assembly comprises an air supply pipe (81) and an air supply member (82) arranged on the ceiling (100), the air supply pipe (81) is connected between the cooling fan output end (71) and the air supply member (82).

5. The oil-suction refrigerating range hood according to claim 4, characterized in that: The first return air inlet (1001) is spaced apart from the air supply member (82).

6. The hood according to claim 1, characterized in that: The condenser (4) comprises a main body (41) capable of conducting heat and a refrigerant channel (42) arranged on the main body (41), the main body (41) is in the form of a pipe, the refrigerant channel (42) is directly formed in the inside of the wall of the main body (41), and the space surrounded by the main body (41) of the condenser (4) forms an exhaust smoke channel (412).

7. The hood according to claim 6, characterized in that: The condenser (4) further comprises a hollow heat dissipation pipe (43) capable of passing oil fume, the heat dissipation pipe (43) is arranged in the space surrounded by the main body (41) and is spaced apart from the main body (41), and a heat conduction sheet (44) is connected between the heat dissipation pipe (43) and the main body (41).

8. The hood according to claim 6 or 7, characterized in that: The wall of the main body (41) comprises two layers of heat conduction plates (411), and the gap between the two layers of heat conduction plates (411) forms the refrigerant channel (42).

9. The hood according to claim 6, characterized in that: The main body (41) of the condenser (4) is arranged at the fan system output end (32).

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