CN218328309U - Fume exhaust fan - Google Patents

Abstract

The utility model relates to a range hood, include: the machine body is provided with an air inlet; the filter screen is arranged at the air inlet of the machine body and comprises at least two grid pieces which are arranged side by side, and the adjacent two grid pieces limit an air supply flow passing through flow opening; the condensing device is fixed relative to the machine body and comprises a refrigerator for cooling fluid, and the refrigerator is provided with a first fluid inlet for the fluid to be cooled to enter and a first fluid outlet for the cooled fluid to flow out; at least one grating sheet of the filter screen is hollow inside to form a condensation chamber, and the condensation chamber is communicated with the first fluid inlet and the first fluid outlet of the refrigerator in a fluid mode. The grid piece (the inside condensation cavity) of the filter screen at the air inlet of the body of the range hood is communicated with the condensing device to form a condensation loop which can continuously cool the grid piece, so that the grid piece can be kept in a relatively low temperature state, and the condensation purification effect on the oil smoke is improved.

Description

Fume exhaust fan

Technical Field

The utility model relates to a kitchen appliance technical field especially relates to a range hood.

Background

The range hood is a kitchen appliance for purifying the kitchen environment. In order to realize the filtering of the oil smoke, a corresponding filter screen is usually arranged at an air inlet of a machine body of the range hood, and the filter screen with a grid structure is generally adopted in consideration of improving the condensation filtering effect of oil smoke particles. The filter screen can filter more oil drops and large particles at the smoke inlet of the range hood and can realize better flow guide effect.

The application number is CN201420432754.X (the authorized publication number is CN 203980389U), the grille oil screen for the range hood with the adjustable air suction opening is arranged at any position from the range hood smoke suction opening or the smoke suction opening to the air inlet of the volute of the range hood, and comprises an outer frame, a plurality of rotating holes which are opposite in position are arranged on the outer frame, a plurality of thin sheets are arranged in the outer frame, and rotating shafts which are inserted into the rotating holes in the outer frame are arranged at two ends of each thin sheet.

However, the above-mentioned oil fume exhauster grille oil screen still has certain deficiency, the grid piece of general grille oil screen all relies on the better heat dispersion of metal material own, because the grid piece can distribute the absorbed heat to the air relatively fast when the oil fume passes through the grid piece, so grid piece temperature is lower for oil droplet, therefore can condense oil droplet, however in long-time work, the temperature of grid piece can rise gradually, so the condensation effect can reduce, and after the temperature reaches certain degree, the oil droplet that is condensed before can be melted and release again.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to prior art's current situation, provide a range hood that is good to oil smoke condensation filter effect.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: a range hood, comprising:

the machine body is provided with an air inlet;

the filter screen is arranged at the air inlet of the machine body and comprises at least two grid sheets which are arranged side by side, and the adjacent two grid sheets limit an air supply flow passing through flow opening;

the condensing device is fixed relative to the machine body and comprises a refrigerator for cooling the fluid, and the refrigerator is provided with a first fluid inlet for the fluid to be cooled to enter and a first fluid outlet for the cooled fluid to flow out;

at least one grid sheet of the filter screen is hollow inside to form a condensation chamber, and the condensation chamber is communicated with the first fluid inlet and the first fluid outlet of the refrigerator in a fluid mode.

In order to better ensure the condensation effect of the grid plate, a condensation flow channel which is arranged in a circuitous way is defined in the condensation chamber of the grid plate, and the condensation flow channel is communicated with the first fluid inlet and the first fluid outlet of the refrigerator in a fluid mode.

Preferably, the grid plate has a first end and a second end opposite to each other in the length direction, and the condensation flow channel includes at least two branch channels extending between the first end and the second end of the grid plate, and each branch channel is arranged along the width direction of the grid plate and is communicated with the branch channels in sequence. Of course, it is conceivable that the branch channels of the condensation channel extend in the width direction of the grid plate and are arranged in sequence in the length direction of the grid plate.

In order to better perform reasonable space arrangement at the air inlet and avoid the connecting pipeline between the refrigerator and the grating sheet from being blocked at one side of the air inlet, the first fluid inlet and the first fluid outlet of the refrigerator are respectively connected to the first end part and the second end part of the grating sheet.

The refrigerator can be various existing refrigerators which cool liquid or gas, and considering that the gravity of the liquid has certain influence on the flexible deflection of the grating sheet, the refrigerator preferably adopts gas (which can be air) as a cooling fluid medium, and the refrigerator is an air refrigerator.

Considering that there may be a case where the temperature of the air fluid after heat exchange by the grid plates is high, in this case, rather than discharging the air fluid with high heat exchange temperature, new natural air (with relatively low temperature) is directly sucked through the refrigeration equipment, for this purpose, each grid plate has a second fluid inlet for the cooled fluid to enter into the condensation chamber and a second fluid outlet for the cooled fluid to be discharged from the condensation chamber, and a ventilation valve for ventilation with the outside is further provided in a flow path between the first fluid inlet of the refrigerator and the second fluid outlet of the grid plate. The gas exchange valve may be an electrically controlled valve.

In order to better detect the temperature of the air fluid after the heat exchange of the grid plates and the cooling of the refrigerator, the air-cooling type air-cooling system further comprises a first temperature sensor for detecting the temperature of the fluid after the cooling of the refrigerator and a second temperature sensor for detecting the temperature of the heat exchange fluid discharged from a second fluid outlet of the grid plates.

In order to better ensure the suction and exhaust effect at the air inlet according to the oil smoke generating position (relative to the air inlet), each grid sheet of the filter screen is rotatably connected to the air inlet of the machine body in an angle-adjustable mode so as to change the air inlet angle of the overflowing opening between two adjacent grid sheets.

In order to ensure that each grid plate can deflect synchronously, two fixing frames which are arranged oppositely are arranged at the air inlet, two end parts of each grid plate in the length direction are rotatably connected to the two fixing frames, and the grid plates are connected together through an auxiliary supporting frame.

In order to avoid the interference problem of the deflection process of the grating pieces and the cooling pipeline correspondingly connected with the grating pieces, the condensation device further comprises a first pipeline and a second pipeline, wherein the first pipeline is used for being connected with a first fluid inlet of the refrigerator, the second pipeline is used for being connected with a second fluid outlet of the refrigerator, the first pipeline is provided with a first joint respectively used for being connected with each grating piece, the second pipeline is provided with a second joint respectively used for being connected with each grating piece, each first joint is installed on one fixing frame and is sequentially arranged along the arrangement direction of each grating piece at the air inlet, and each second joint is installed on the other fixing frame and is sequentially arranged along the arrangement direction of each grating piece at the air inlet;

each grid plate is also provided with a first side edge and a second side edge which are opposite in the width direction, each grid plate is provided with a second fluid inlet through which cooled fluid enters the condensation chamber and a second fluid outlet through which heat-exchanged fluid in the condensation chamber is discharged, the second fluid inlet and the second fluid outlet of each grid plate are arranged close to the first side edge of each grid plate and are substantially positioned on the same straight line, the second fluid inlet is rotatably connected with the second joint, and the second fluid outlet is rotatably connected with the first joint.

Generally, the grid plates can be adjusted in a deflection angle in a manual mode, and in order to achieve automatic swinging of the grid plates, the automatic swinging device further comprises an electric push rod fixed relative to the machine body, and a power output end of the electric push rod is connected with the auxiliary supporting frame so as to drive each grid plate to swing relative to the fixing frame.

Compared with the prior art, the utility model has the advantages that: the grid piece (the inside condensation cavity) of the filter screen at the air inlet of the body of the range hood is communicated with the condensing device to form a condensation loop which can continuously cool the grid piece, so that the grid piece can be kept in a relatively low temperature state, and the condensation purification effect on the oil smoke is improved.

Drawings

Fig. 1 is a schematic perspective view of a range hood according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a condensation circulation loop formed between a filter screen and a condensing device according to an embodiment of the present invention;

FIG. 3 is a cross-sectional perspective view at A of FIG. 2;

FIG. 4 is a cross-sectional perspective view at B of FIG. 2;

FIG. 5 is a schematic perspective view of an upper grid plate of FIG. 2 without the filter screen;

FIG. 6 is a perspective view of the rear side view of FIG. 5 (with a top grid plate of the filter screen in a disassembled state);

fig. 7 is an internal structure view of a grid plate according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

Directional terms such as "front", "rear", "upper", "lower", "left", "right", "side", "top", "bottom", and the like are used in the description and claims of the present invention to describe various example structural portions and elements of the present invention, but these terms are used herein for convenience of description only and are determined based on example orientations shown in the drawings. Because the disclosed embodiments may be arranged in different orientations, these directional terms are for illustrative purposes only and should not be construed as limiting, and for example, "upper" and "lower" are not necessarily limited to orientations opposite or consistent with the direction of gravity.

Referring to fig. 1 to 7, a range hood includes a body 10, a fan system, and a filter screen 20. The machine body 10 comprises a fan frame 11 and a smoke collecting hood 12, the fan system is arranged in the fan frame 11, and the smoke collecting hood 12 is arranged at the bottom of the fan frame 11 and communicated with the fan frame 11. An air inlet 120 is formed in the front side wall of the smoke collecting hood 12, and the filter screen 20 is arranged at the air inlet 120 and used for condensing and filtering the oil smoke.

Referring to fig. 2, the filter net 20 includes at least two grating pieces 21 arranged side by side. The air inlet 120 of the present embodiment is a strip-shaped opening extending in the transverse direction of the fume collecting hood 12. The grating pieces 21 of the filter net 20 also extend in the transverse direction of the smoke collecting hood 12, i.e., in the same direction as the length direction of the air inlet 120. Each of the grid segments 21 is arranged in series in the width direction of the air inlet 120, and adjacent two grid segments define the air supply flow passage openings 22.

Referring to fig. 3 and 4, the air inlet 120 of the smoke collecting hood 12 has two opposite fixing frames 51, and the two fixing frames 51 are respectively disposed at the left and right sides of the air inlet 120 and extend along the width direction of the air inlet 120. In order to facilitate the installation and fixation between the fixing frames 51 and the grid pieces 21, the two fixing frames 51 are further provided with an installation seat 52 corresponding to each grid piece 21, the installation seat 52 has an opening facing the inner side, and when the installation is carried out, the end part of the grid piece 21 can be inserted into the opening of the installation seat 52.

Referring to fig. 7, two ends of each grid segment 21 in the length direction are a first end 211 and a second end 212, respectively, and two sides in the width direction are a first side 213 and a second side 214, respectively. Both ends of each grating sheet 21 in the length direction are rotatably connected to two fixing frames 51, wherein the position where each grating sheet 21 is rotatably connected to the fixing frame 51 is adjacent to the first side 213 of the grating sheet 21. In order to ensure that the grating pieces 21 can be deflected synchronously, the grating pieces 21 are also connected together by an auxiliary support 53, wherein the connection position of the auxiliary support 53 and the grating pieces 21 (also understood as the connection position with the mounting seat 52) is arranged adjacent to the second side edge 214 of the grating pieces 21, as shown in detail in fig. 5 and 6.

The auxiliary support frame 53 is integrally U-shaped, and includes two opposite vertical rods and a cross rod connected between the two vertical rods. Two vertical rods of the auxiliary support frame 53 are respectively rotatably connected with two end parts of each grating sheet 21 in the length direction. An electric push rod 54 is further arranged on the inner wall of the smoke collecting hood 12, a power output end of the electric push rod 54 is connected with a cross rod of the auxiliary support rod, and when the electric push rod 54 acts, the auxiliary support rod can drive each grid sheet 21 to deflect synchronously, so that the air inlet angle of smoke at the air inlet 120 is changed.

The inside cavity of grid piece 21 of filter screen 20 of this embodiment forms the condensation chamber, and this condensation chamber can form one with outside condensing equipment intercommunication and can form one and can last refrigerated condensation return circuit to grid piece 21 for grid piece 21 can keep in the relatively lower state of temperature, has improved the condensation purifying effect to the oil smoke.

The condensation chamber of each grid plate 21 defines a condensation flow channel 217 in a circuitous arrangement, the condensation flow channel 217 of a grid plate 21 comprises at least two sub-channels 2170 extending between the first end 211 and the second end 212 of the grid plate 21, each sub-channel 2170 being arranged in the width direction of the grid plate 21 and communicating in sequence. The arrangement of the circuitous condensation flow channel 217 of the grid plate 21 enables the condensed fluid to be uniformly distributed in each area of the grid plate 21 as much as possible, so that the grid plate 21 can keep a relatively low temperature state as a whole, and the condensation effect of the grid plate 21 is better ensured.

The condensation device comprises a refrigerator 30, a first line 41, a second line 42, a gas exchange valve 33, a first connection 410, a second connection 420, a first temperature sensor 34 and a second temperature sensor 35.

The chiller 30 of the present embodiment is preferably an air chiller 30 that cools the air fluid by the user, wherein the air chiller 30 itself may have a powered pump that drives the fluid circulation. The refrigerator 30 has a first fluid inlet 31 into which a fluid to be cooled enters and a first fluid outlet 32 from which a cooled fluid exits. Wherein the first fluid inlet 31 of the refrigerator 30 is connected to the first pipeline 41, and the first pipeline 41 is connected to the second fluid outlet 216 of the first end 211 of the grating 21 through the first joint 410. The first fluid outlet 32 of the refrigerator 30 is connected to the second line 42, and the second line 42 is in turn connected to the second fluid inlet 215 of the second end 212 of the grill 21 via the second connection 420.

Each first joint 410 is mounted on one of the fixing frames 51, and is arranged in sequence along the arrangement direction of each grid piece 21 at the air inlet 120. Similarly, each second joint 420 is mounted on another fixing frame 51, and is arranged in sequence along the arrangement direction of each grid piece 21 at the air inlet 120.

In the present embodiment, two ends of each grid plate 21 in the length direction respectively have a second fluid inlet 215 for the cooled fluid to enter the condensation chamber and a second fluid outlet 216 for the heat-exchanged fluid in the condensation chamber to exit, wherein the second fluid inlet 215 and the second fluid outlet 216 of each grid plate 21 are disposed adjacent to the first side 213 of the grid plate 21 and are substantially on the same straight line.

When the grid segments 21 are installed, the second fluid outlet 216 is rotatably disposed on the first connector 410, and the second fluid inlet 215 of the grid segments 21 is rotatably disposed on the second connector 420. In order to avoid leakage problems at the respective joints during rotation of the grid segments 21, seals (not shown) may be provided between the second fluid outlet 216 and the first joint 410, and between the second fluid inlet 215 and the second joint 420 of the grid segments 21. Specifically, each grating piece 21 can be deflected around a straight line between the first joint 410 and the second joint 420 as a rotation center by driving of the electric push rod 54.

The mounting structure of the grating pieces 21 also facilitates the disassembly and cleaning of the grating pieces 21. After the range hood is shut down, a user can simply detach the grating pieces 21 for cleaning at any time.

Considering that there may be a situation where the temperature of the air fluid after heat exchange through the grating sheet 21 is high, in this case, rather than discharging the air fluid with high heat exchange temperature, new natural air (with relatively low temperature) is directly sucked through the refrigeration equipment, for this reason, a ventilation valve 33 for ventilation with the outside is further provided in the flow path between the first fluid inlet 31 of the refrigerator 30 and the second fluid outlet 216 of the grating sheet 21 (i.e. on the first pipeline 41), and the ventilation valve 33 may be an electrically controlled valve. The first temperature sensor 34 is disposed in the second pipeline 42 for detecting the temperature of the fluid cooled by the refrigerator 30. A second temperature sensor 35 is disposed in the first pipe 41 for detecting the temperature of the heat exchange fluid discharged through the second fluid outlet 216 of the grid plate 21.

The first temperature sensor 34, the second temperature sensor 35 and the scavenging valve 33 are all electrically connected with the control system of the range hood, so that the control system can control the opening and closing of the scavenging valve 33 according to the temperature signals transmitted by the first temperature sensor 34 and the second temperature sensor 35.

The control process of the gas exchange valve 33 is for example as follows: the temperature of the fluid cooled by the refrigerator 30 detected by the first temperature sensor 34 is denoted as t1, the temperature of the air fluid after heat exchange by the grid plates 21 detected by the second temperature sensor 35 is denoted as t2, and a preset value t10 to which the air temperature after refrigeration by the refrigerator 30 should reach is set. And adjusting the power of the refrigeration equipment according to the difference value of t10-t1 to achieve the fastest refrigeration with the lowest energy consumption. And then selecting whether to retain the air according to the difference value of t2-t1, and if the difference value of t2-t1 reaches a set value, directly discharging the air through an exhaust valve and sucking new natural air. If the difference value between t2 and t1 does not reach the set value, ventilation is not needed, and the air can be continuously recycled.

The term "fluid communication" as used herein refers to a spatial relationship between two components or portions (hereinafter, referred to as a first portion and a second portion) in a unified manner, i.e., a fluid (gas, liquid or a mixture thereof) can flow along a flow path from the first portion or/and be transported to the second portion, and may be directly communicated between the first portion and the second portion, or indirectly communicated between the first portion and the second portion via at least one third member, which may be a fluid passage such as a pipe, a channel, a duct, a flow guide member, a hole, a groove, or a chamber allowing the fluid to flow therethrough, or a combination thereof.

Claims (11)

1. A range hood, comprising:

a machine body (10) having an air inlet (120);

the filter screen (20) is arranged at the air inlet (120) of the machine body (10) and comprises at least two grid pieces (21) which are arranged side by side, and the two adjacent grid pieces (21) limit an air supply flow passing through flow opening (22);

it is characterized by also comprising:

the condensing device is fixed relative to the machine body (10) and comprises a refrigerator (30) used for cooling the fluid, and the refrigerator (30) is provided with a first fluid inlet (31) for the fluid to be cooled to enter and a first fluid outlet (32) for the cooled fluid to flow out;

at least one grid segment (21) of the filter screen (20) is hollow inside forming a condensation chamber, which is in fluid communication with a first fluid inlet (31) and a first fluid outlet (32) of the refrigerator (30).

2. The range hood of claim 1, wherein: the condensation chamber of the grid plate (21) defines a circuitous condensation flow channel (217), and the condensation flow channel (217) is in fluid communication with the first fluid inlet (31) and the first fluid outlet (32) of the refrigerator (30).

3. The range hood of claim 2, wherein: the grid plate (21) is provided with a first end part (211) and a second end part (212) which are opposite in the length direction, the condensation flow channel (217) comprises at least two sub-flow channels (2170) which extend between the first end part (211) and the second end part (212) of the grid plate (21), and the sub-flow channels (2170) are arranged along the width direction of the grid plate (21) and are communicated in sequence.

4. The range hood of claim 3, wherein: the first fluid inlet (31) and the first fluid outlet (32) of the refrigerator (30) are respectively connected to the first end (211) and the second end (212) of the grid plate (21).

5. The range hood of claim 1, wherein: the refrigerator (30) is an air refrigerator (30).

6. The range hood of claim 5, wherein: each grid plate (21) is provided with a second fluid inlet (215) for allowing cooled fluid to enter the condensation chamber and a second fluid outlet (216) for discharging heat-exchanged fluid in the condensation chamber, and a ventilation valve (33) for ventilating the outside is further arranged in a flow path between the first fluid inlet (31) of the refrigerator (30) and the second fluid outlet (216) of the grid plate (21).

7. The range hood of claim 6, wherein: the device also comprises a first temperature sensor (34) used for detecting the temperature of the fluid cooled by the refrigerator (30) and a second temperature sensor (35) used for detecting the temperature of the heat exchange fluid discharged through a second fluid outlet (216) of the grid sheet (21).

8. The range hood according to any one of claims 1 to 7, wherein: each grid piece (21) of the filter screen (20) is rotatably connected to an air inlet (120) of the machine body (10) in an angle-adjustable mode so as to change the air inlet angle of the overflowing opening (22) between two adjacent grid pieces (21).

9. The range hood of claim 8, wherein: the air inlet (120) is provided with two fixing frames (51) which are oppositely arranged, two end parts of each grid sheet (21) in the length direction are rotatably connected to the two fixing frames (51), and the grid sheets (21) are also connected together through an auxiliary supporting frame (53).

10. The range hood of claim 9, wherein: the condensation device further comprises a first pipeline (41) used for being connected with a first fluid inlet (31) of the refrigerator (30) and a second pipeline (42) used for being connected with a second fluid outlet (216) of the refrigerator (30), the first pipeline (41) is provided with a first joint (410) respectively used for being connected with each grid plate (21), the second pipeline (42) is provided with a second joint (420) respectively used for being connected with each grid plate (21), each first joint (410) is installed on one fixing frame (51) and is sequentially arranged along the arrangement direction of each grid plate (21) at the air inlet (120), each second joint (420) is installed on the other fixing frame (51) and is sequentially arranged along the arrangement direction of each grid plate (21) at the air inlet (120);

each grid plate (21) is also provided with a first side edge (213) and a second side edge (214) which are opposite in the width direction, each grid plate (21) is provided with a second fluid inlet (215) for cooled fluid to enter a condensation chamber and a second fluid outlet (216) for heat-exchanged fluid in the condensation chamber, the second fluid inlet (215) and the second fluid outlet (216) of each grid plate (21) are arranged adjacent to the first side edge (213) of the grid plate (21) and are substantially positioned on the same straight line, the second fluid inlet (215) is rotatably connected with the second joint (420), and the second fluid outlet (216) is rotatably connected with the first joint (410).

11. The range hood of claim 9, wherein: the electric grating machine is characterized by further comprising an electric push rod (54) fixed relative to the machine body (10), wherein the power output end of the electric push rod (54) is connected with the auxiliary supporting frame (53), so that the grating sheets (21) are driven to swing relative to the fixing frame (51).

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