CN217441751U - Oil smoke suction device - Google Patents

Abstract

The application relates to a lampblack suction device, which comprises: a wind cabinet; the smoke collecting hood is arranged at one end of the wind cabinet; the fan assembly is accommodated in the air cabinet and comprises a volute and centrifugal blades, the volute forms an accommodating space, and the centrifugal blades are accommodated in the accommodating space; the heat exchange system is provided with a loop for circulating refrigerant and comprises a first heat exchange unit, and the first heat exchange unit can absorb or release heat in a controlled manner; wherein, be equipped with the heat transfer chamber in the spiral case, the accommodation space is encircleed along circumference in the heat transfer chamber, and first heat transfer unit accepts in the heat transfer intracavity. The oil fume suction device can cool and frost and heat and defrost the fan assembly through the first heat exchange unit, and self-cleaning of the oil fume suction device is achieved. Meanwhile, when the oil fume suction device sucks oil fume, the first heat exchange unit can also cool the fan assembly to condense the oil fume, so that the performance of the oil fume suction device is ensured, the oil-grease separation degree is improved, and the service life of the whole machine is prolonged.

Description

Oil fume suction device

Technical Field

The application relates to the technical field of kitchen appliances, in particular to an oil fume suction device.

Background

With the development of science and technology and the improvement of living standard of people, the requirement of people on living comfort degree is higher and higher. The range hood serving as a common kitchen appliance can absorb and discharge oil smoke generated in the cooking process to the outside, so that the influence on the body health of a user due to the fact that the user inhales excessive oil smoke is avoided.

But along with lampblack absorber live time's gradual increase, the internals of lampblack absorber can adhere to the greasy dirt, along with adnexed greasy dirt increases gradually, can lead to the smoking efficiency of lampblack absorber to descend, the consumption increases, can breed bacterium and cockroach simultaneously, influences the kitchen health, therefore the inner chamber of lampblack absorber must regularly wash.

At present, methods such as a water washing method, a steam cleaning method, an electric heating dissolution method and the like are generally used for cleaning the inner cavity of the range hood, but the cleaning effect of the methods is still poor, and oil stains still accumulate inside the volute along with the prolonging of the service life.

SUMMERY OF THE UTILITY MODEL

This application provides an oil smoke suction device to the not good problem of lampblack absorber cleaning performance, and this oil smoke suction device can reach self-cleaning prevents the technological effect of greasy dirt accumulation.

According to an aspect of the present application, there is provided a lampblack suction device comprising:

a wind cabinet;

the smoke collecting hood is arranged at one end of the wind cabinet;

the fan assembly is contained in the air cabinet and comprises a volute and centrifugal blades, the volute structure forms a containing space, and the centrifugal blades are contained in the containing space; and

the heat exchange system is provided with a loop for circulating refrigerant and comprises a first heat exchange unit, and the first heat exchange unit can absorb or release heat in a controlled manner;

the spiral case is internally provided with a heat exchange cavity, the heat exchange cavity circumferentially surrounds the accommodating space, and the first heat exchange unit is accommodated in the heat exchange cavity.

In one embodiment, the fume extraction device has a self-cleaning mode and a suction mode;

when the lampblack suction device is in the self-cleaning mode, the first heat exchange unit is sequentially in a heat absorption state for absorbing heat inside the volute and a heat release state for releasing the heat;

when the lampblack suction device is in a suction mode, the first heat exchange unit is in a heat absorption state for absorbing heat inside the volute.

In one embodiment, the fume suction device further comprises a frost layer sensor disposed within the volute for detecting a thickness of a frost layer within the volute.

In one embodiment, one end of the heat exchange cavity extends along a curve, and one end of the first heat exchange unit extends along the extending direction of the heat exchange cavity in a curve mode.

In one embodiment, the volute comprises:

a volute top plate;

the volute front plate and the volute rear plate are respectively connected to two opposite sides of the volute top plate in the axial direction of the centrifugal fan blade; and

the volute casing enclosing plate is connected between the volute casing front plate and the volute casing rear plate, one end of the volute casing enclosing plate is connected with one side of the volute casing top plate, and the other end of the volute casing enclosing plate circumferentially surrounds the edges of the volute casing front plate and the volute casing rear plate and is connected with the other side of the volute casing top plate;

the volute surrounding plate, the volute front plate and the volute rear plate jointly form the accommodating space; the volute front plate and the volute rear plate are both provided with air inlets communicated with the accommodating space, and the volute top plate is provided with air outlets communicated with the accommodating space; the volute enclosing plate comprises a peripheral plate and an inner enclosing plate which are arranged in a stacked mode in the thickness direction of the volute enclosing plate, and the heat exchange cavity is formed between the peripheral plate and the inner enclosing plate.

In one embodiment, the first heat exchange unit has a liquid inlet end and a liquid outlet end, and the liquid inlet end and the liquid outlet end respectively penetrate through the top plate of the volute and extend out of the heat exchange cavity.

In one embodiment, the lampblack suction device further comprises a dynamic filter screen, and the dynamic filter screen is installed at the air inlet.

In one embodiment, the heat exchange system further comprises a second heat exchange unit, the second heat exchange unit is installed outside one end of the wind cabinet far away from the smoke collecting hood, and the second heat exchange unit is connected to the first heat exchange unit through a pipeline.

In one embodiment, the heat exchange system further comprises an auxiliary air supply unit, wherein the auxiliary air supply unit is installed at one end of the wind cabinet far away from the fume collecting hood and is positioned at one side of the second heat exchange unit.

In one embodiment, the heat exchange system further comprises a compressor, the compressor is connected to the first heat exchange unit through a pipeline, and the compressor is installed outside one end, far away from the fume collecting hood, of the wind cabinet.

The oil fume suction device can cool and frost and heat and defrost the fan assembly through the first heat exchange unit, and self-cleaning of the oil fume suction device is achieved. Meanwhile, when the oil fume suction device sucks oil fume, the first heat exchange unit can also cool the fan assembly to condense the oil fume, so that the performance of the oil fume suction device is ensured, the oil-grease separation degree is improved, and the service life of the whole machine is prolonged.

Drawings

Fig. 1 is a schematic structural view of a lampblack suction device according to an embodiment of the present application;

fig. 2 is a schematic structural view of a fan assembly provided with a first heat exchange unit of the lampblack suction device shown in fig. 1;

FIG. 3 is an exploded schematic view of the fan assembly of FIG. 2 with a first heat exchange unit;

FIG. 4 is a side view of the fan assembly shown in FIG. 2;

fig. 5 is a schematic structural view of a first heat exchange unit of the lampblack suction device shown in fig. 1;

fig. 6 is a schematic view illustrating a control method of a lampblack suction device according to an embodiment of the application;

the reference numbers illustrate:

100. a fume extraction device; 20. a wind cabinet; 40. a smoke collecting hood; 60. a fan assembly; 61. a volute; 612. a volute top plate; 614. a volute front plate; 616. a volute back plate; 618. a volute casing coaming; 619. an accommodating space; 6181. a peripheral plate; 6183. an inner coaming; 6185. a heat exchange cavity; 67. a dynamic filter screen; 81. a compressor; 83. a first heat exchange unit; 832. a liquid inlet end; 834. a liquid outlet end; 85. a second heat exchange unit; 87. an auxiliary air supply unit.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.

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 are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

As shown in fig. 1 and fig. 2, a lampblack suction device 100 according to an embodiment of the present application is used for absorbing lampblack generated in a cooking process and discharging the lampblack to an external environment or a flue.

The cooking fume suction apparatus 100 includes a hood 20, a fume collecting hood 40, a fan assembly 60, and a heat exchange system. Wherein, collection petticoat pipe 40 locates the one end of wind cabinet 20, and fan subassembly 60 is acceptd in wind cabinet 20, including spiral case 61 and centrifugal fan blade, spiral case 61 structure forms an accommodation space 619, and centrifugal fan blade is acceptd in accommodation space 619. The heat exchange system comprises a compressor 81, a first heat exchange unit 83, a second heat exchange unit 85 and a throttling unit, wherein the compressor 81, the first heat exchange unit 83, the second heat exchange unit 85 and the throttling unit are sequentially connected through pipelines to form a loop for circulating cooling medium, and the first heat exchange unit 83 can be used as an evaporation structure to absorb heat and can also be used as a condensation structure to absorb heat.

Thus, the lampblack suction device 100 can perform cooling, frosting and heating defrosting on the fan assembly 60 through the first heat exchange unit 83 in the heat exchange system, and self-cleaning of the lampblack suction device 100 is achieved. Meanwhile, when the oil fume suction device 100 sucks oil fume, the first heat exchange unit 83 can also cool the fan assembly 60 to condense the oil fume, so that the performance of the oil fume suction device 100 is ensured, the oil-grease separation degree is improved, and the service life of the whole machine is prolonged.

Specifically, the wind cabinet 20 has a substantially hollow cubic structure, a height direction of the wind cabinet 20 extends in a first direction (i.e., a Z direction in fig. 1), a length direction of the wind cabinet 20 extends in a second direction (i.e., an X direction in fig. 1), and a width direction of the wind cabinet 20 extends in a third direction perpendicular to the first direction and the second direction. It is to be understood that the shape and size of the wind cabinet 20 is not limited and may be configured as desired to meet different needs.

The smoke collecting hood 40 is of a hollow shell structure, the smoke collecting hood 40 is arranged under the wind cabinet 20 in the first direction, the cross section of the smoke collecting hood 40 perpendicular to the first direction is rectangular, and the area of the cross section of the smoke collecting hood 40 perpendicular to the first direction is larger than that of the cross section of the wind cabinet 20 perpendicular to the first direction, so that the smoke collecting hood 40 has a large coverage range to improve the absorption amount of the lampblack. It is to be understood that the shape and size of the smoke collecting hood 40 are not limited thereto, and may be set as needed to meet various requirements.

Referring to fig. 2, 3 and 4, the volute 61 is a hollow shell-shaped structure, and includes a volute top plate 612, a volute front plate 614, a volute rear plate 616 and a volute enclosing plate 618. The volute top plate 612 is a rectangular plate-shaped structure, the length direction of the volute top plate 612 extends along the second direction, and the width direction of the volute top plate 612 extends along the third direction. The volute front plate 614 and the volute rear plate 616 are flat structures with the same shape, and are arranged at intervals in the third direction to be respectively connected to two opposite sides of the volute top plate 612 in the second direction. Volute bulkhead 618 is connected between volute front plate 614 and volute back plate 616, one end of volute bulkhead 618 is connected to one side of volute top plate 612 in the third direction, and the other end of volute bulkhead 618 circumferentially surrounds the edges of volute front plate 614 and volute back plate 616 to connect to the other side of volute top plate 612 in the third direction.

Therefore, the volute front plate 614, the volute rear plate 616 and the volute enclosing plate 618 are jointly constructed to form an accommodating space 619 for accommodating the centrifugal fan, air inlets communicating with the accommodating space 619 can be opened on the volute front plate 614 and the volute rear plate 616 respectively, the volute top plate 612 can be opened with an air outlet communicating with the accommodating space 619, oil smoke can flow into the accommodating cavity from the air inlets and then flow out through the air outlet.

The volute 61 is further internally provided with a driving motor, the centrifugal fan blade is mounted at the output end of the driving motor, the central axial direction of the centrifugal fan blade extends along the second direction, and the centrifugal fan blade can rotate under the driving of the driving motor to generate air flow.

In order to integrate the first heat exchange unit 83 in the lampblack suction device 100, the volute casing 618 comprises an outer peripheral plate 6181 and an inner peripheral plate 6183, the outer peripheral plate 6181 and the inner peripheral plate 6183 are stacked in the thickness direction of the volute casing 618, a certain gap is formed between the outer peripheral plate 6181 and the inner peripheral plate 6183 to form a heat exchange cavity 6185, and one end of the heat exchange cavity 6185 extends along a helical line in a bending manner to circumferentially surround the accommodating space 619. The first heat exchange unit 83 is accommodated in the heat exchange cavity 6185, and one end of the first heat exchange unit 83 bends and extends along the extending direction of the heat exchange cavity 6185 to match the shape of the heat exchange cavity 6185. The first heat exchange unit 83 has a liquid inlet end 832 for inputting a refrigerant and a liquid outlet end 834 for outputting the refrigerant, the liquid inlet end 832 and the liquid outlet end 834 are respectively located at two opposite sides of one end of the first heat exchange unit 83 close to the volute top plate 612 in the first direction, and a pipeline communicating the liquid inlet end 832 and the liquid outlet end 834 of the first heat exchange unit 83 penetrates through the volute top plate 612 in the first direction and extends out of the heat exchange cavity 6185 to be connected with the evaporator and the compressor 81.

Thus, the first heat exchange unit 83 is integrated in the fan assembly 60 without occupying the rest of the space in the air cabinet 20, so that the integration level of the lampblack suction device 100 and the heat exchange system is effectively improved, and the number of the whole parts is reduced.

Further, a frost layer sensor (not shown) is disposed in the scroll casing 61, and the frost layer sensor is disposed in the scroll casing 61 and is used for detecting a frost layer in the scroll casing 61. It is understood that the position of the frost layer sensor is not limited, and the frost layer sensor can be disposed at different positions on the front volute plate 614, the rear volute plate 616, the enclosing volute plate 618 or each component in the volute 61, and the detection of the frost layer can be achieved.

In some embodiments, the fan assembly 60 further includes two dynamic filter screens 67, and the two dynamic filter screens 67 are respectively installed at the air inlets formed on the front volute plate 614 and the rear volute plate 616, and are in transmission connection with the output end of the motor and respectively located at two sides of the centrifugal fan blade. Under the drive of the motor, the two dynamic filter screens 67 and the axial flow fan blade rotate synchronously, and the rotating dynamic filter screens 67 can form a physical filter layer to intercept oil stain particles.

Referring to fig. 1 again, the second heat exchanging unit 85 is installed outside an end of the wind cabinet 20 away from the smoke collecting cover 40, and the second heat exchanging unit 85 can be used for absorbing heat of the surrounding environment or releasing heat to change a state of the refrigerant. It is understood that the installation position of the second heat exchange unit 85 is not limited and may be set as required.

In some embodiments, the heat exchange system further includes an auxiliary air supply unit 87, and the auxiliary air supply unit 87 may be an axial flow fan, and is installed at one end of the wind cabinet 20 away from the fume collecting hood 40 and at one side of the second heat exchange unit 85, for assisting the second heat exchange unit 85 in dissipating heat. It is understood that, in other embodiments, the auxiliary air feeding unit 87 may not be provided, and the second heat exchanging unit 85 may be provided at the air outlet of the volute top plate 612, so that the oil smoke flowing out through the air outlet can be directly dissipated.

The above-described lampblack suction device 100 has a self-cleaning mode and a suction mode. When the lampblack suction device 100 is in the self-cleaning mode, the first heat exchange unit 83 is in the heat absorption state and the heat release state, so that the temperature of the volute 61 can be reduced firstly to form a frost layer in the volute 61, and then the volute is switched to the heat release state to melt the frost layer and take away oil stains, so that the cleaning purpose is achieved. When the soot suction device 100 is in the suction mode, the first heat exchange unit 83 is in the heat absorption state to reduce the temperature inside the scroll casing 61, thereby improving the degree of grease separation.

As shown in fig. 6, the present application further provides a control method of a lampblack suction device, for controlling the lampblack suction device 100 of any one of the above schemes, wherein the control method of the lampblack suction device comprises a self-cleaning mode, and the self-cleaning mode comprises the following steps:

s110: and acquiring a self-cleaning instruction.

Specifically, the device for acquiring the self-cleaning command is a command acquiring device, and the command acquiring device is connected to the controller of the lampblack suction device 100 and sends the acquired self-cleaning command to the controller. The instruction acquisition device is usually arranged on the smoke collecting hood 40 of the range hood, the type of the instruction acquisition device is not unique, for example, the instruction acquisition device can be a key, the operation is simple, and the instruction acquisition device can also be a voice recognition device or a gesture recognition device, so that the use convenience is higher, and the instruction acquisition device is not particularly limited herein.

S120: in response to the self-cleaning command, the first heat exchange unit 83 is controlled to be in a heat absorbing state to form a frost layer in the scroll casing 61.

After the controller obtains the self-cleaning instruction, the self-cleaning mode is considered to be started by a user, and at the moment, the controller sends a self-cleaning signal to the heat exchange system.

After the heat exchange system starts to work, the first heat exchange unit 83 is in a heat absorption state firstly, when the low-temperature and low-pressure liquid refrigerant flows through the first heat exchange unit 83, the low-temperature and low-pressure liquid refrigerant exchanges heat with air in the volute 61 assembly, the low-temperature and low-pressure liquid refrigerant changes into a high-temperature and low-pressure gaseous refrigerant after absorbing heat, meanwhile, water in the air in the volute 61 condenses after encountering cold, and is continuously polymerized to grow up to finally form a frost layer.

The high-temperature low-pressure gaseous refrigerant flows into the compressor 81 along the pipeline, and is compressed into the high-temperature high-pressure gaseous refrigerant by the compressor 81, the high-temperature high-pressure gaseous refrigerant continues to flow into the second heat exchange unit 85 through the pipeline, and exchanges heat with the outside air with the assistance of the auxiliary air supply unit 87, the heat of the high-temperature high-pressure gaseous refrigerant is released and changed into a low-temperature high-pressure liquid refrigerant, the low-temperature high-pressure liquid refrigerant is throttled by the throttling unit and then changed into a low-temperature low-pressure liquid refrigerant, and the low-temperature high-pressure liquid refrigerant flows into the first heat exchange unit 83 again for heat exchange, so that a refrigeration cycle is formed.

S130: it is detected whether or not a frost layer satisfying a preset condition exists in the scroll casing 61.

Specifically, step S130 specifically includes the following steps:

s131: the thickness of the frost layer was measured.

Specifically, a frost layer sensor within volute 61 may detect the thickness of the frost layer.

S132: and when the thickness of the frost layer reaches the preset thickness, detecting the temperature of the frost layer.

Specifically, when the frost layer, which is gradually thickened, comes into contact with the frost layer sensor, the frost layer sensor preliminarily judges that the frost layer reaches a preset thickness, and simultaneously starts to detect the temperature of the frost layer.

S133: when the duration time that the temperature of the frost layer is lower than the preset temperature reaches the preset time, it is determined that the frost layer meeting the preset condition exists in the scroll casing 61.

Specifically, the preset temperature can be-5 deg.C, and the preset time is 3 min. On the premise that the frost layer sensor is in contact with the frost layer, when the temperature of the frost layer is lower than-5 ℃ and the duration time reaches 3min, the frost layer is judged to achieve the preset effect. If the duration of the frost layer lower than the preset temperature is less than the preset time, the first heat exchange unit 83 should be continuously controlled to maintain the heat absorption state until the duration of the frost layer lower than the preset temperature reaches the preset time, so as to prevent the frost layer from not reaching the predetermined effect.

Because the judgment of whether the frost layer reaches the preset condition needs to simultaneously meet the two conditions, the interference of other factors on the frost layer sensor and the influence of frost layer cold radiation can be eliminated, the frost layer can reach the preset thickness, and the self-cleaning requirement is met.

S140: when a frost layer with a preset thickness exists in the volute 61, the first heat exchange unit 83 is controlled to be in a heat release state.

Specifically, during the formation of the frost layer, the structure of the greasy dirt gradually changes with the progress of polymerization of the frost layer on the surface thereof, and the adhesion thereof gradually decreases. After the frost layer with the preset thickness is formed, the first heat exchange unit is switched to a heat releasing state, the second heat exchange unit is switched to a heat absorbing state, the low-temperature and low-pressure liquid refrigerant flows through the second heat exchange unit 85, the low-temperature and low-pressure liquid refrigerant is evaporated after absorbing heat to form a high-temperature and low-pressure gaseous refrigerant, and the high-temperature and low-pressure gaseous refrigerant flows into the compressor 81 and is compressed into a high-temperature and high-pressure gaseous refrigerant. The high-temperature high-pressure gas refrigerant flows into the first heat exchange unit to exchange heat with gas inside the volute 61, the refrigerant after releasing heat is condensed to form a low-temperature high-pressure liquid refrigerant, a frost layer inside the volute 61 is rapidly melted at high temperature, and simultaneously, the frost layer is split and takes away oil dirt and oil dirt, and finally the frost layer flows into the smoke collection cover 40 to achieve the purpose of cleaning. The low-temperature low-pressure liquid refrigerant flows into the second heat exchange unit again for heat exchange.

In some embodiments, the fume suction device 100 control method further comprises a suction mode comprising the steps of:

s210: and acquiring a starting instruction.

Specifically, the device for acquiring the start instruction is an instruction acquiring device, and the instruction acquiring device is connected to the controller of the lampblack suction device 100 and sends the acquired self-cleaning instruction to the controller. The instruction acquisition device is usually arranged on the smoke collecting hood 40 of the range hood, the type of the instruction acquisition device is not unique, for example, the instruction acquisition device can be a key, the operation is simple, and the instruction acquisition device can also be a voice recognition device or a gesture recognition device, so that the use convenience is higher, and the instruction acquisition device is not particularly limited herein.

S220: in response to the start command, the first heat exchange unit 83 is controlled to be in the heat absorption state, and the fan assembly 60 is controlled to be in the suction state.

After the controller obtains the self-cleaning command, the controller sends a signal to the fan assembly 60 and the heat exchange system. The fan assembly 60 is in a suction state, and under the driving of the centrifugal fan blades, oil smoke can enter the volute 61 through the filtration of the dynamic filter screen 67 and then is discharged from the air outlet. In the heat exchange system, the first heat exchange unit 83 is in a heat absorption state, when the low-temperature and low-pressure liquid refrigerant flows through the first heat exchange unit 83, the low-temperature and low-pressure liquid refrigerant exchanges heat with air in the volute 61 assembly, the low-temperature and low-pressure liquid refrigerant is changed into a high-temperature and low-pressure gaseous refrigerant after absorbing heat, and meanwhile, oil smoke particles in the volute 61 are condensed. The high-temperature low-pressure gaseous refrigerant flows into the compressor 81 along the pipeline, and is compressed into the high-temperature high-pressure gaseous refrigerant by the compressor 81, the high-temperature high-pressure gaseous refrigerant continues to flow into the second heat exchange unit 85 through the pipeline, and exchanges heat with the outside air with the assistance of the auxiliary air supply unit 87, the heat of the high-temperature high-pressure gaseous refrigerant is released and changed into a low-temperature high-pressure liquid refrigerant, the low-temperature high-pressure liquid refrigerant is throttled by the throttling unit and then changed into a low-temperature low-pressure liquid refrigerant, and the low-temperature high-pressure liquid refrigerant flows into the first heat exchange unit 83 again for heat exchange, so that a refrigeration cycle is formed.

So, the vast majority of oil smoke granule after the condensation in the spiral case 61 can be separated on dynamic filter screen 67, has improved whole grease separation degree, and the low temperature environment that first heat transfer unit 83 heat absorption formed simultaneously is favorable to the motor heat dissipation, guarantees that the motor gives play to best performance.

The lampblack suction device 100 and the lampblack suction device control method utilize a heat exchange technology to cool and frost and heat the interior of the fan assembly 60, so that the self-cleaning of the fan assembly 60 is realized. And when absorbing the oil smoke, can improve the grease separation degree through the low temperature environment after the heat transfer, reduced the temperature rise of the driving motor in the fan subassembly 60 to improve the wholeness ability of oil smoke suction device 100, prolonged the life of oil smoke suction device 100.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A lampblack suction device, comprising:

a wind cabinet (20);

the smoke collecting hood (40) is arranged at one end of the wind cabinet (20);

the fan assembly (60) is contained in the air cabinet (20), the fan assembly (60) comprises a volute (61) and centrifugal fan blades, the volute (61) forms an accommodating space (619) in a structure, and the centrifugal fan blades are contained in the accommodating space (619); and

a heat exchange system having a loop for the circulation of a refrigerant and comprising a first heat exchange unit (83), said first heat exchange unit (83) being controllable to absorb or release heat;

wherein, be equipped with heat transfer chamber (6185) in spiral case (61), heat transfer chamber (6185) encircles along circumference accommodation space (619), first heat transfer unit (83) accept in heat transfer chamber (6185).

2. The fume extraction device of claim 1, wherein said fume extraction device has a self-cleaning mode and a suction mode;

when the lampblack suction device is in the self-cleaning mode, the first heat exchange unit (83) is in a heat absorption state of absorbing heat inside the volute (61) and a heat release state of releasing heat in sequence;

when the cooking fume suction device is in a suction mode, the first heat exchange unit (83) is in a heat absorption state of absorbing heat inside the scroll (61).

3. The cooking fume suction device according to claim 1, characterized in that it further comprises a frost layer sensor, provided inside said volute (61), for detecting the thickness of the frost layer inside said volute (61).

4. The cooking fume suction device according to claim 1, characterized in that one end of said heat exchange cavity (6185) extends curvedly along a helix, and one end of said first heat exchange unit (83) extends curvedly along the extension direction of said heat exchange cavity (6185).

5. The cooking fume suction arrangement, according to claim 1, characterized in that said volute (61) comprises:

a volute top plate (612);

a volute front plate (614) and a volute rear plate (616) which are respectively connected to two opposite sides of the volute top plate (612) in the axial direction of the centrifugal fan blade; and

a volute enclosure (618) connected between the volute front plate (614) and the volute back plate (616), one end of the volute enclosure (618) being connected to one side of the volute top plate (612), and the other end of the volute enclosure (618) circumferentially surrounding the edges of the volute front plate (614) and the volute back plate (616) and being connected to the other side of the volute top plate (612);

wherein the volute enclosure plate (618), the volute front plate (614) and the volute back plate (616) together form the accommodation space (619); the volute front plate (614) and the volute rear plate (616) are both provided with air inlets communicated with the accommodating space (619), and the volute top plate (612) is provided with air outlets communicated with the accommodating space (619); the volute coaming (618) comprises an outer coaming plate (6181) and an inner coaming plate (6183) which are stacked along the thickness direction of the volute coaming, and the heat exchange cavity (6185) is formed between the outer coaming plate (6181) and the inner coaming plate (6183).

6. The fume extraction apparatus according to claim 5, characterized in that said first heat exchange unit (83) has a liquid inlet end (832) and a liquid outlet end (834), said liquid inlet end (832) and said liquid outlet end (834) respectively protruding through said volute top plate (612) out of said heat exchange chamber (6185).

7. The cooking fume extraction apparatus according to claim 5, further comprising a dynamic filter screen (67), said dynamic filter screen (67) being mounted to said air inlet.

8. A cooking fume suction arrangement, according to claim 1, characterized in that said heat exchange system further comprises a second heat exchange unit (85), said second heat exchange unit (85) being mounted outside the end of said fume hood (20) remote from said fume collecting hood (40), said second heat exchange unit (85) being connected to said first heat exchange unit (83) by means of a duct.

9. A cooking fume extraction apparatus according to claim 8, wherein the heat exchange system further comprises an auxiliary air feed unit (87) mounted at an end of the hood (20) remote from the fume collecting hood (40) and on a side of the second heat exchange unit (85).

10. A cooking fume suction arrangement, according to claim 1, characterized in that the heat exchange system further comprises a compressor (81), the compressor (81) being connected to the first heat exchange unit (83) by means of a duct, the compressor (81) being mounted outside the end of the hood (20) remote from the fume collecting hood (40).

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