CN110925834A

CN110925834A - Fume exhaust fan

Info

Publication number: CN110925834A
Application number: CN201911212246.4A
Authority: CN
Inventors: 刘朝红; 宋砚波
Original assignee: Haixin (guangdong) Kitchen & Sanitary System Co Ltd
Current assignee: Haixin (guangdong) Kitchen & Sanitary System Co Ltd; Hisense Guangdong Kitchen and Bath System Co Ltd
Priority date: 2019-11-28
Filing date: 2019-11-28
Publication date: 2020-03-27

Abstract

The invention discloses a range hood, relates to the technical field of kitchen electrical equipment, and is used for solving the problem that a condensing plate in the existing range hood has poor refrigeration effect and has poor condensing and separating effects on oil smoke. The range hood of the invention comprises: the air conditioner comprises a machine body, a fan and a controller, wherein an air inlet is formed in the machine body; a soot passage defined in the body and communicating with the air inlet; the condensing plate is arranged on the machine body and is positioned at the air inlet or in the oil smoke channel; shape memory alloy fibers disposed inside the cold plate; a driving device for driving the shape memory alloy fiber to twist around the axial direction thereof so as to change the twist of the shape memory alloy fiber and/or to stretch and contract along the axial direction thereof. The range hood of the invention is used for sucking cooking oil fume.

Description

Fume exhaust fan

Technical Field

The invention relates to the technical field of kitchen electrical equipment, in particular to a range hood.

Background

The condensing plate in the range hood is used for condensing and separating grease in oil smoke. However, in the actual cooking process, as can be seen from the distribution of the temperature field of the cooking oil fume shown in fig. 1, the temperature of the cooking oil fume is high and can reach 60-65 ℃; the high temperature oil smoke that the culinary art process produced makes the surface temperature of condensing plate rise fast in the range hood, leads to the condensing plate condensation, the effect of separation grease loses totally to make a large amount of oil mist molecules that contain in the high temperature oil smoke directly get into the oil smoke passageway, gather on surfaces such as fan, spiral case, wind channel wall, get into inside the motor even, make the impeller lose dynamic balance, thereby lead to the operating noise increase of range hood, the wind-force of fan and range hood's life all reduces.

Therefore, the range hood in the prior art comprises a machine body, wherein an air inlet is arranged on the machine body, and an oil smoke channel communicated with the air inlet is defined in the machine body; the semiconductor refrigeration assembly is provided with a semiconductor refrigeration piece, a refrigeration flow passage, a refrigeration inlet and a refrigeration outlet refrigeration flow passage which are communicated with the refrigeration flow passage are formed in the semiconductor refrigeration assembly and are arranged at the refrigeration end of the semiconductor refrigeration piece; the condensing plate, the condensing plate is established on the organism and is located the air inlet department of organism or in the oil smoke passageway that the organism formed, is formed with the refrigerant runner in the condensing plate, the both ends of refrigerant runner respectively with refrigeration import and refrigeration export intercommunication, the refrigerant runner in the refrigerant accessible refrigeration export flow direction condensing plate that the temperature is low promptly to reduce the temperature of condensing plate, thereby can carry out the condensation to the oil smoke mist of the condensing plate of flowing through.

Above-mentioned technical scheme adopts semiconductor refrigeration subassembly, and semiconductor refrigeration subassembly has the semiconductor refrigeration piece, and the semiconductor refrigeration piece is the instrument of a heat transfer, but because semiconductor self exists resistance, will produce the heat when the electric current passes through the semiconductor to can influence the outdoor heat transfer of semiconductor refrigeration piece, and the heat between two semiconductor refrigeration pieces also can carry out reverse heat transfer through air and semiconductor material self, consequently, the refrigeration efficiency of semiconductor refrigeration piece is low. Furthermore, the refrigerant flows to the refrigerant runner in the condensing plate through the refrigeration outlet, and along with the extension of the refrigerant runner, the refrigerant can exchange heat with the surrounding space when passing through the pipe wall of the channel, so that the temperature of the refrigerant is increased, the refrigeration effect of the condensing plate is further reduced, and the condensing plate has poor condensation and separation effects on grease in the oil smoke.

Disclosure of Invention

The invention provides a range hood, which is used for solving the problem that the condensing and separating effects of a condensing plate in the existing range hood are poor due to the poor refrigerating effect of the condensing plate.

In order to achieve the above object, the range hood provided by the present invention comprises: the air conditioner comprises a machine body, a fan and a controller, wherein an air inlet is formed in the machine body; a soot passage defined in the body and communicating with the air inlet; the condensing plate is arranged on the machine body and is positioned at the air inlet or in the oil smoke channel; shape memory alloy fibers disposed inside the cold plate; a driving device for driving the shape memory alloy fiber to twist around the axial direction thereof so as to change the twist of the shape memory alloy fiber and/or to stretch and contract along the axial direction thereof.

The range hood provided by the embodiment of the invention has the advantages that the shape memory alloy fiber is arranged in the condensing plate, and the shape memory alloy fiber can be twisted and/or stretched along the axial direction of the shape memory alloy fiber through the driving device. According to the principle of mechanical thermal effect, when the twist of the shape memory alloy fiber is reduced and/or compressed, the temperature of the shape memory alloy fiber is reduced, so that heat can be absorbed from the surrounding air, and the shape memory alloy fiber is arranged inside the condensing plate, so that the shape memory alloy fiber can absorb the heat from the condensing plate, the refrigeration of the condensing plate is realized, the condensing and separating effects of the condensing plate on grease in oil smoke are improved, and the oil smoke condensed and separated by the condensing plate is discharged outdoors after entering the oil smoke channel. The shape memory alloy fiber and the driving device are arranged in the condensing plate, the conversion of mechanical energy and heat energy is realized through the mechanical thermal effect principle, compared with the conversion of electric energy and heat energy in the prior art, the refrigerating efficiency is higher, the refrigerating effect of the condensing plate is improved, and the condensing and separating effects of the condensing plate on oil smoke are improved.

On the other hand, the embodiment of the invention also provides a control method of the range hood, which is applied to the range hood, and the control method comprises the following steps: acquiring a working instruction, wherein the working instruction is used for indicating the operation mode of the range hood; according to the working instruction, the control driving device drives the shape memory alloy fiber to twist around the axis of the shape memory alloy fiber so as to change the twist of the shape memory alloy fiber and/or stretch along the axis direction of the shape memory alloy fiber.

According to the control method of the range hood provided by the embodiment of the invention, after the range hood obtains the working instruction, the operating mode of the range hood is indicated to be operated according to the operating mode indicated by the working instruction. If the condensing plate is required to condense and separate grease in oil smoke, the control driving device drives the shape memory alloy fiber to twist around the axis of the shape memory alloy fiber so that the shape memory alloy fiber can twist along the axis direction and/or stretch along the axis direction, the temperature of the shape memory alloy fiber is reduced, the temperature of the surface of the condensing plate arranged outside the shape memory alloy fiber is reduced, and the condensing and separating effects of the condensing plate on the oil smoke are improved. According to the embodiment of the invention, the shape memory alloy fiber and the driving device are arranged in the condensing plate, and the conversion of mechanical energy and heat energy is realized through the mechanical thermal effect principle.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a temperature field profile of cooking fumes in an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a range hood according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a condensation plate in the range hood according to the embodiment of the present invention;

fig. 4 is a schematic diagram of a process for cooling or heating by mechanical thermal effect according to an embodiment of the present invention;

FIG. 5 is a graph showing the surface temperature and average temperature of a shape memory alloy fiber as a function of twist for one shape memory alloy fiber in accordance with an embodiment of the present invention;

FIG. 6 is a graph showing the variation of the surface temperature and the average temperature of the shape memory alloy fibers with the twist, when two shape memory alloy fibers are used in the embodiment of the present invention;

FIG. 7 is a graph showing the surface temperature and average temperature of the shape memory alloy fibers as a function of twist for three shape memory alloy fibers in accordance with an embodiment of the present invention;

FIG. 8 is a graph showing the surface temperature and average temperature of the shape memory alloy fiber as a function of twist for four shape memory alloy fibers in an embodiment of the present invention;

FIG. 9 is a schematic view of a configuration of a shape memory alloy fiber with a pulley at one end of the fiber in accordance with an embodiment of the present invention;

FIG. 10 is a schematic view of a configuration for applying torque to one end of a shape memory alloy fiber in an embodiment of the present invention;

FIG. 11 is a schematic diagram of the configuration of the shape memory alloy fibers with torque applied to both ends in an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be a mechanical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description of the present invention, "and/or" is only one kind of association relationship describing an association object, and means that there may be three kinds of relationships, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

At present, the range hood is widely applied along with the improvement of the living standard and the economic standard of people. The range hood is also called as a range hood, and is a kitchen appliance for purifying the kitchen environment. The range hood is usually installed above a kitchen range, after the power supply of the range hood is switched on, the fan is started, the fan sucks oil smoke generated by cooking into an oil smoke channel, and the oil smoke is condensed and separated through the condensing plate, so that part of oil in the oil smoke is condensed on the surface of the condensing plate to complete the first separation; the oil smoke that gets into in the oil smoke passageway afterwards, through the rotation of fan impeller, the oil smoke in the oil smoke passageway receives the effect of centrifugal force for oil mist in the oil smoke agglutinates into the oil droplet, in order to accomplish the secondary separation, and waste gas is discharged outdoor from the oil smoke passageway afterwards, thereby can reduce the kitchen pollution, purifies the kitchen air, and has gas defense, explosion-proof safety guarantee effect.

Referring to fig. 2 to 3, a range hood provided by the embodiment of the present invention includes: the air conditioner comprises a machine body 1, wherein an air inlet 11 is formed in the machine body 1; a lampblack channel which is communicated with the air inlet 11 is limited in the machine body 1; the condensing plate 2 is arranged on the machine body 1 and is positioned at the air inlet 11 or in the oil smoke channel; shape memory alloy fibers 3, the shape memory alloy fibers 3 being arranged inside the condensation plate 2; and the driving device is used for driving the shape memory alloy fiber 3 to twist around the axial direction of the shape memory alloy fiber to change the twist of the shape memory alloy fiber 3 and/or to stretch and contract along the axial direction of the shape memory alloy fiber.

The range hood provided by the embodiment of the invention has the advantages that the shape memory alloy fiber 3 is arranged in the condensing plate 2, and the shape memory alloy fiber 3 can be twisted and/or stretched along the axial direction of the condensing plate through the driving device. According to the principle of mechanical thermal effect, when the twist of the shape memory alloy fiber 3 is reduced and/or compressed, the temperature of the shape memory alloy fiber 3 is reduced, so that heat can be absorbed from the surrounding air, and because the shape memory alloy fiber 3 is arranged inside the condensing plate 2, the shape memory alloy fiber 3 can absorb the heat from the condensing plate 2, so that the refrigeration of the condensing plate 2 is realized, the condensing and separating effects of the condensing plate 2 on grease in oil smoke are improved, and the oil smoke condensed and separated by the condensing plate 2 is discharged outdoors after entering an oil smoke channel. In the embodiment of the invention, the shape memory alloy fiber 3 and the driving device are arranged in the condensing plate 2, and the conversion of mechanical energy and heat energy is realized through the mechanical heat effect principle.

It should be noted that: according to the principle of the mechanical thermal effect, the thermodynamic process of the mechanical thermal effect is reversible, the thermodynamic efficiency can reach more than 70% of the Carnot cycle efficiency, when grease is condensed on the surface of the condensing plate 2 and the grease condensed on the surface of the condensing plate 2 needs to be cleaned, the driving device can drive the twist and/or the length of the shape memory alloy fiber 3 to be increased, the temperature of the shape memory alloy fiber 3 can be increased at the moment, and heat can be dissipated to the surrounding environment, so that the condensing plate 2 can be heated, and oil stains adhered to the surface of the condensing plate 2 can be cleaned easily.

In addition, the embodiment of the invention adopts the technical scheme, compared with the prior art, the range hood does not need to be provided with a refrigerant circulating channel, so that the whole structure of the range hood is simplified, and the embodiment of the invention solves the problems of toxicity, easy leakage, flammability and the like of the traditional gas refrigerating working medium by adopting solid refrigeration or heating, and simultaneously also solves the problems of ozone layer damage, greenhouse effect and the like caused by using the traditional gas refrigerating working medium. By adopting the embodiment of the invention, a compressor is not needed, so the noise and the vibration of the range hood are small.

It should be noted that: the mechanical heat effect comprises an elastic heat effect, the elastic heat effect is the latent heat generated in the martensite phase transformation process of the shape memory alloy fiber, and the material releases and absorbs the latent heat of phase transformation in the stress-induced martensite phase transformation and reverse phase transformation processes, so that the refrigeration or the heating is realized.

Referring to FIG. 4, before the shape memory alloy fiber is not stressed (loaded), the shape memory alloy fiber is in an austenite state, at which time the temperature T of the shape memory alloy fiber is the initial temperature T₀(ii) a When the stress applied to the shape memory alloy fiber exceeds the critical stress for phase transformation, the shape memory alloy fiber undergoes an exothermic austenite-martensite transformation. If the process is carried out sufficiently quickly, it can be considered as an adiabatic process, and the temperature T of the shape memory alloy fiber itself will rise to T₀+T_ad. During the phase change, the entropy of the system is reduced, and the latent heat of phase change T is simultaneously reduced_adIs released into the surrounding environment, at which time the temperature T of the shape memory alloy fiber returns to the initial temperature T₀Thereby achieving the heating effect.

After the stress applied to the shape memory alloy fiber is unloaded (load is released), the shape memory alloy fiber generates the martensite-austenite reverse phase transformation which absorbs heat, and the moment of unloading the stress can be regarded as an adiabatic process, so that the temperature T of the shape memory alloy fiber is reduced to T₀-T_adAs the reverse transformation proceeds, the shape memory alloy fiber absorbs heat from the surrounding environment, returning the temperature T of the shape memory alloy fiber to the initial temperature T₀Thereby achieving the refrigeration effect.

Further, in order to increase the heat transfer efficiency between the condensation plate 2 and the shape memory fiber 3, the range hood in the embodiment of the present invention further includes a heat conductive material 4, the condensation plate 2 is a hollow structure, the heat conductive material 4 is filled inside the condensation plate 2 and immerses the shape memory alloy fiber 3, as shown in fig. 3, so that the heat transfer between the shape memory alloy fiber 3 and the condensation plate 2 is performed through the heat conductive material 4.

Optionally, the shape memory alloy fiber 3 is disposed inside the condensation plate 2 and abuts against the side wall of the condensation plate 2, so that heat between the shape memory alloy fiber 3 and the condensation plate 2 can be mutually transferred to improve heat transfer efficiency between the shape memory alloy fiber 3 and the condensation plate 2.

Paste or liquid heat conduction material is selected as the heat conduction material 4, and the condensation plate 2 is filled with the paste or liquid heat conduction material, so that the gaps between the shape memory alloy fibers 3 and the condensation plate 2 can be better filled with the paste or liquid heat conduction material, and the heat transfer efficiency between the shape memory alloy fibers 3 and the condensation plate 2 can be further improved.

Wherein, the heat conduction material 4 is any one or more of heat conduction paste, heat conduction silicone grease or nano fluid.

Based on the above embodiments, the shape memory alloy fiber 3 may also be a fiber such as a natural rubber fiber or a nylon 6 fiber, and the shape memory alloy fiber 3 has a larger thermal conductivity than the latter two types of shape memory fibers, so the shape memory alloy fiber is preferred in the embodiments of the present invention.

In order to allow the shape memory alloy fiber to release or absorb more heat, the shape memory alloy fiber 21 may be any one or more of a Cu-based shape memory alloy fiber, a Ni-Ti-based shape memory alloy fiber, or a Ni-Mn-based shape memory alloy fiber.

It should be noted that: when a load is applied or released to the shape memory alloy fiber 3, the amount of heat released or absorbed by the shape memory alloy fiber 3 into the surrounding environment is closely related to its elemental composition, fiber diameter, fiber length, fiber strand number, and the like.

Referring to fig. 5, when the shape memory alloy fiber 3 is selected to have the same elemental composition, fiber diameter, fiber length, and fiber strand number, and the twist density of the shape memory alloy fiber is higher, the heat released/absorbed by the shape memory alloy fiber 3 is larger by rapidly twisting the shape memory alloy fiber.

Referring to FIGS. 5 to 8, Ni_52.6-Ti_47.4The element composition, the fiber diameter and the fiber length of the shape memory alloy fiber are all equal, only Ni_52.6-Ti_47.4The strands of the shape memory alloy fibers vary in number. Ni in FIG. 5_52.6-Ti_47.41 fiber of shape memory alloy, Ni in FIG. 6_52.6-Ti_47.42 shape memory alloy fibers, Ni in FIG. 7_52.6-Ti _47.43 shape memory alloy fibers, Ni in FIG. 8_52.6-Ti_47.4The number of the shape memory alloy fibers is 4. From this, it can be known that Ni_52.6-Ti_47.4The greater the number of strands of the shape memory alloy fiber, by rapidly twisting Ni_52.6-Ti_47.4Ni with larger number of strands for shape memory alloy fiber of the same twist_52.6-Ti_47.4The more heat the shape memory alloy fiber releases/absorbs. Wherein the solid dots in FIGS. 5 to 8 represent Ni_52.6-Ti_47.4Maximum temperature change Δ T of the surface of the shape memory alloy fiber_maxThe open dots in FIGS. 5 to 8 represent Ni_52.6-Ti_47.4Average temperature change Δ T of the surface of the shape memory alloy fiber_avg。

The invention also provides a Ni-Ti based shape memory alloy fiber and a twisting effect temperature change table thereof, wherein the Ni-Ti based shape memory alloy fiber has the same element composition, fiber diameter, fiber length and fiber twist, and the Ni-Ti based shape memory alloy fiber and the twisting effect temperature change table are shown in table 1 only when the fiber strands are different. Wherein the unit of the temperature change of the torsional heating effect is K.

TABLE 1 Ni-Ti based shape memory alloy and its twisting heat effect temperature change table

The embodiment of the invention provides a table of the thermal insulation temperature change of the partial shape memory alloy fiber and the elastic thermal effect thereof, as shown in table 2. Wherein the unit of the material composition of the shape memory alloy is at%, the at% is atom percentage content, the unit of the load is MPa, and the unit of the adiabatic temperature change of the elastic thermal effect is K.

TABLE 2 shape memory alloy fiber and its elastic thermal effect adiabatic temperature variation table

Material composition	Load(s)	Adiabatic temperature change by elastothermal effect
			Cu₈₃Al₁₄Ni₃	150	16
Cu_68.13Zn_15.74Al_16.13	120	11
			Cu₇₃Al₁₅Mn₁₂	130	11.6
Cu_71.5Al_17.5Mn₁₁	183	16.1
			Ni₅₀Ti₅₀	500	25.5
Ni_50.4Ti_49.6	500	16
			Ni_50.5Ti_49.5	1300	58
Ni_50.38Ti_49.52	500	15
			Ni_49.1Ti_50.5Fe_0.4	500	16
Ni_48.9Ti_51.1	800	25
			Ni₅₀Mn₁₉Ga₂₇Co₄	300	10
Ni₄₆Mn₃₈Sb₁₂Co₄	100	15

Referring to fig. 3, shape memory alloy fiber 3 has many, and many shape memory alloy fibers 3 intervals set up, set up many shape memory alloy fibers, can increase its absorption or release heat to its refrigeration or the effect of heating to condensing plate 2 has further been improved, makes condensing plate 2 obtain further improvement to the condensation of oil smoke, condensation effect, has still improved the grease cleaning effect on condensing plate 2 surface simultaneously.

In the following, a plurality of shape memory alloy fibers 3 will be specifically described with reference to the specific embodiment, and the plurality of shape memory alloy fibers 3 are driven by the driving device to twist around the axial direction thereof to change the twist of the plurality of shape memory alloy fibers 3 and/or to expand and contract along the axial direction thereof.

Example 1

The driving device comprises a driving piece; the driving piece is connected with the driving piece; the end parts of the shape memory alloy fibers are respectively and fixedly provided with at least one driven part, and the driving part can drive the driven parts to rotate. Optionally, the driving device includes a plurality of driving members, and at least one driving member is fixedly disposed at each of the ends of the plurality of shape memory alloy fibers to drive the shape memory alloy fibers 3 to twist around the axial direction thereof, so as to change the twist of the shape memory alloy fibers 3. Compared with the latter, the former scheme can drive the driving part to rotate through the driving part, and can drive the driven parts to rotate simultaneously, so that the twist of the shape memory fibers can be changed, the number of the driving parts required to be arranged is small, the driving device is simple in structure and low in cost, and meanwhile, the energy consumption required to be consumed by the driving part can be effectively reduced.

Referring to fig. 3 and 9, the driving member is a driving motor; the driving part is a belt; the follower is band pulley 5, and a plurality of band pulleys 5 all mesh with the belt, because the belt has elasticity, consequently drive a plurality of band pulleys 5 through the belt and rotate simultaneously, can alleviate impact and vibration load among the transmission course, and belt drive's smooth operation, noiselessness.

Optionally, the drive member is a drive motor; the driving part is a chain; the driven part is a chain wheel, and a plurality of chain wheels are all meshed with the chain wheel, and the chain transmission can work in severe environments such as high temperature, humidity, dustiness, pollution and the like, and has the advantages of accurate average transmission, reliable work and high efficiency.

Example 2

The driving device comprises a driving piece; the driving piece is connected with the moving piece to drive the moving piece to move along the axis direction of the shape memory alloy fibers, and the end parts of the shape memory alloy fibers are fixedly connected with the moving piece. Optionally, the driving device includes a plurality of driving members, and at least one driving member is fixedly disposed at each of the ends of the plurality of shape memory alloy fibers to drive the shape memory alloy fibers 3 to extend and contract along the axial direction thereof. Compared with the latter, the former scheme drives the moving part to move through the driving part, so that the lengths of the plurality of shape memory alloy fibers fixedly connected with the moving part can be changed, at least one driving part is not required to be arranged at the end part of each shape memory alloy fiber, the cost of the driving device is reduced, the structural complexity of the driving device is simplified, and the control process of the driving device is simpler.

Referring to fig. 2 and 3, the driving member is a linear motor, the extension and contraction direction of the output shaft of the linear motor is consistent with the axial direction of the shape memory alloy, and the moving member is a connecting rod 6, so that the connecting rod 6 is directly driven by the driving member to move along the axial direction of the shape memory alloy fibers 3, so as to realize the extension and compression of the plurality of shape memory alloy fibers 3.

Optionally, the driving part is a driving motor, the moving part is a connecting rod, and one end of each of the shape memory alloy fibers 3 is fixedly connected with the connecting rod; the gear is arranged below the connecting rod; the rack is fixedly arranged on the lower surface of the connecting rod and positioned between the connecting rod and the gear, and the rack is meshed with the gear.

Above-mentioned sliding connection between connecting rod and the organism 1, the connecting rod is close to one side of organism 1 and is equipped with the slip arch, is provided with the slip recess that corresponds with it on the organism 1 simultaneously. Or, one side of the connecting rod, which is close to the machine body 1, is provided with a sliding groove, and the machine body 1 is provided with a sliding bulge corresponding to the sliding groove, so that the sliding connection between the connecting rod and the machine body 1 is simple and convenient and is easy to realize by the method.

It should be noted that: the driving device is arranged at any end of the shape memory alloy fiber 3, and the other end of the shape memory alloy fiber 3 is fixedly connected with the condensing plate, wherein the fixed connection between the shape memory alloy fiber 3 and the condensing plate 2 can be realized by adopting welding, riveting and other modes.

Of course, the driving device includes two identical driving devices, one of the two identical driving devices is disposed at one end of the shape memory alloy fiber 3, and the other driving device is disposed at the other end of the shape memory alloy fiber 3, so that the two ends of the shape memory alloy fiber 3 are stressed uniformly, and the service life of the shape memory alloy fiber 3 is prolonged.

Example 3

The driving device includes a first driving device and a second driving device, wherein the first driving device includes: a first driving member; the first driving piece is connected with the first driving piece; the first driving part can drive the first driven parts to rotate; the second driving device includes: a second driving member; the second moving part, the second driving piece is connected with the second moving part to the drive moving part removes along the fibrous axis direction of shape memory alloy, and many fibrous one ends of shape memory alloy are fixed respectively and are provided with at least one first follower, and the other end all with moving part fixed connection, realizes the fibrous twist degree change of shape memory alloy through first drive arrangement, realizes the fibrous length variation of shape memory alloy through the second drive arrangement, and just the aforesaid sets up simple and convenient, easily realizes.

Optionally, the first drive member is a drive motor; the first driving part is a belt; the first driven part is a belt wheel, and a plurality of belt wheels are all meshed with the belt; the second driving piece is a linear motor, the telescopic direction of an output shaft of the linear motor is consistent with the axial direction of the shape memory alloy, the second moving piece is a connecting rod, and the driving piece in the driving device is stable in operation, low in noise, small in driving piece number, low in cost and easy to control.

Optionally, the first drive member is a drive motor; the first driving part is a chain; the first driven part is a chain wheel, and a plurality of chain wheels are all meshed with the belt; the second driving piece is a linear motor, the telescopic direction of an output shaft of the linear motor is consistent with the axis direction of the shape memory alloy, and the second moving piece is a connecting rod, so that the driving device is simple in control process while the safe and reliable operation and high transmission efficiency of the driving device are guaranteed.

It should be noted that: when there are a plurality of shape memory alloy fibers 3, the plurality of shape memory alloy fibers 3 on the upper portion of the condensation plate 2 may be twisted around the axial direction thereof to change the twist of the shape memory alloy fibers 3 on the upper portion. The shape memory alloy fiber 3 of the lower portion of the condensation plate 2 can be extended and contracted in the axial direction thereof to change the length of the shape memory alloy fiber 3 of the lower portion.

Further, the shape memory alloy fiber 3 is one, and the shape memory alloy fiber 3 is provided one, so that the shape memory alloy fiber has a large diameter and a large number of strands, and a large amount of heat can be released/absorbed even by forming the shape memory alloy fiber 3 one. Since a shape memory fiber has a simple structure, its driving device and control process are simple, and will be briefly described below.

Alternatively, one end of the shape memory alloy fiber 3 is fixedly provided with the driving motor 7, and the other end is fixedly connected with the condensation plate 2, as shown in fig. 10. Alternatively, the two ends of the shape memory alloy fiber 3 are fixedly provided with the driving motors 7, which are the first driving motor 71 and the second driving motor 72, respectively, wherein the rotation directions of the first driving motor 71 and the second driving motor 72 are opposite, as shown in fig. 11.

Optionally, the two ends of the shape memory alloy fiber 3 are both fixedly provided with a driving device, and the two driving devices are respectively a first driving device and a second driving device, wherein the first driving device drives the shape memory alloy fiber to extend and retract along the axis direction of the shape memory alloy fiber, and the second driving device drives the shape memory alloy fiber to rotate around the axis of the shape memory alloy fiber. The first driving device is a linear motor or an eccentric shaft motor, and the second driving device is a servo motor or a stepping motor.

Further, by assembling the shape memory alloy fiber and the driving device in the embodiment of the present invention, it becomes a temperature control device which can be used for cooling or heating the target object. For example, the temperature control device can be used in vaccine preservation, portable refrigerators and other scenarios.

The embodiment of the invention also provides a control method of the range hood, which is applied to the range hood, and the control method comprises the following steps: acquiring a working instruction, wherein the working instruction is used for indicating the operation mode of the range hood; according to the working instruction, the control driving device drives the shape memory alloy fiber to twist around the axis of the shape memory alloy fiber so as to change the twist of the shape memory alloy fiber and/or stretch along the axis direction of the shape memory alloy fiber. The operation of controlling the driving device is executed by a control module in a main controller in the range hood, or by a specially-arranged sub-controller for controlling the driving device in the range hood. The working instruction can be obtained by a user through a remote control device to send to a controller in the range hood, or can be directly operated in the controller by the user, the controller can control all components in the range hood to operate according to the instruction, and the user can send to the controller in the range hood through selecting a function key on a function panel.

According to the control method of the range hood provided by the embodiment of the invention, after the range hood obtains the working instruction, the operating mode of the range hood is indicated to be operated according to the operating mode indicated by the working instruction. If the condensing plate is required to condense and separate grease in oil smoke, the controller sends a corresponding control command, the driving device receives the control command and drives the shape memory alloy fiber to twist around the axis of the shape memory alloy fiber, so that the shape memory alloy fiber can twist along the axis direction of the shape memory alloy fiber and/or stretch along the axis direction of the shape memory alloy fiber, the temperature of the shape memory alloy fiber is reduced, the temperature of the surface of the condensing plate arranged outside the shape memory alloy fiber is reduced, and the condensing and separating effects of the condensing plate on the oil smoke are improved. According to the embodiment of the invention, the shape memory alloy fiber and the driving device are arranged in the condensing plate, and the conversion of mechanical energy and heat energy is realized through the mechanical thermal effect principle.

Further, according to the working instruction, the control driving device drives the shape memory alloy fiber to twist around the axis of the shape memory alloy fiber so as to change the twist of the shape memory alloy fiber and/or stretch along the axis direction of the shape memory alloy fiber, and the control driving device specifically comprises: if the working instruction is a smoke exhaust instruction, controlling the driving device to compress the shape memory alloy fiber; or controlling the driving device to rotate so as to reduce the twist of the shape memory alloy fiber; or controlling the driving device to compress the shape memory alloy fiber and controlling the driving device to rotate so as to reduce the twist of the shape memory alloy fiber. The controller receives a smoke exhaust instruction, namely the smoke exhaust instruction indicates that condensation and cooling are needed to be carried out on a condensation plate in the range hood, then the controller sends a control instruction to the driving device, the driving device receives the control instruction and acts to drive the shape memory alloy fibers to rotate around the axis direction of the shape memory alloy fibers so as to reduce the twist of the shape memory alloy fibers, or compress the shape memory alloy fibers, and simultaneously drive the shape memory alloy fibers to rotate around the axis direction of the shape memory alloy fibers so as to reduce the twist of the shape memory alloy fibers, so that the temperature of the surface of the shape memory alloy fibers is reduced, heat is absorbed from the periphery of the condensation plate, and the separation effect of the condensation plate on grease is improved.

It should be noted that: when the shape memory alloy fiber needs to absorb less heat, the driving device is controlled to compress the shape memory alloy fiber; or controlling the driving device to rotate so as to reduce the twist of the shape memory alloy fiber. When the shape memory alloy fiber needs to absorb more heat, the driving device is controlled to compress the shape memory alloy fiber, and the driving device is controlled to rotate so as to reduce the twist of the shape memory alloy fiber.

Based on the above embodiment, the number of the function keys on the function panel for controlling the range hood to enter the smoke exhausting mode can be two or three. When the number of the function keys is two, if only one function key is started, the controller controls the driving device to compress the shape memory alloy fibers; if only another function key is started, the controller controls the driving device to rotate so as to reduce the twist of the shape memory alloy fiber; if both function keys are turned on, the controller controls the driving device to compress the shape memory alloy fiber and controls the driving device to rotate so as to reduce the twist of the shape memory alloy fiber.

For example, the function key can also be a knob, when the knob is rotated to 1 gear, the controller controls the driving device to compress the shape memory alloy fiber, and when the knob is rotated to 2 gears, the controller controls the driving device to rotate so as to reduce the twist of the shape memory alloy fiber; when the knob is rotated to 3 steps, the controller controls the driving device to compress the shape memory alloy fiber and controls the driving device to rotate so as to reduce the twist of the shape memory alloy fiber.

Optionally, if the working instruction is a smoke exhaust instruction, controlling the driving device to compress the shape memory alloy fiber; or controlling the driving device to rotate so as to reduce the twist of the shape memory alloy fiber; or after controlling the driving device to compress the shape memory alloy fiber and controlling the driving device to rotate so as to reduce the twist of the shape memory alloy fiber, the method further comprises the following steps: the control driving device drives the shape memory alloy fiber to recover the initial state, the initial state of the shape memory alloy fiber has a preset twist (the preset twist is larger than 0 turn/cm), and the length of the shape memory alloy fiber is the initial length (the length when the shape memory alloy fiber is not stretched or compressed), and the control driving device drives the shape memory alloy fiber to recover the initial state, so that the situation that the length and/or the twist of the shape memory alloy fiber are reduced when the range hood is used for smoke exhaust next time can be guaranteed due to the fact that the shape memory alloy fiber has the preset twist.

Further, according to the working instruction, the control driving device drives the shape memory alloy fiber to twist around the axis so as to change the twist of the shape memory alloy fiber and/or stretch along the axis direction, and the control driving device specifically comprises: if the working instruction is a cleaning instruction, controlling a driving device to stretch the shape memory alloy fiber; or controlling the driving device to rotate so as to increase the twist of the shape memory alloy fiber; or controlling the driving device to stretch the shape memory alloy fiber and controlling the driving device to rotate so as to increase the twist of the shape memory alloy fiber. The controller receives a cleaning instruction, namely the cleaning instruction indicates that a condensing plate in the range hood needs to be heated, then the controller sends a control instruction to the driving device, and the driving device receives the control instruction and acts to drive the shape memory alloy fibers to rotate around the axial direction of the shape memory alloy fibers so as to increase the twist of the shape memory alloy fibers, or stretch the shape memory alloy fibers, or drive the shape memory alloy fibers to rotate around the axial direction of the shape memory alloy fibers so as to increase the twist of the shape memory alloy fibers while stretching the shape memory alloy fibers, so that the temperature of the shape memory alloy fibers is increased, heat is released to the surroundings, the temperature of the surface of the condensing plate is increased, and grease condensed on the surface of the condensing plate is melted so as to be convenient to clean.

Similarly, when the shape memory alloy fiber needs to release less heat, the driving device is controlled to stretch the shape memory alloy fiber; or controlling the driving device to rotate so as to increase the twist of the shape memory alloy fiber. When the shape memory alloy fiber needs to release more heat, the control driving device rotates to increase the twist of the shape memory alloy fiber, and the driving device stretches the shape memory alloy fiber.

In order to prolong the fatigue life of the shape memory alloy fiber, the driving device is controlled to rotate so as to increase the twist of the shape memory alloy fiber; or controlling the driving device to stretch the shape memory alloy fiber; or before controlling the first driving device to stretch the shape memory alloy fiber and controlling the second driving device to rotate so as to increase the twist of the shape memory alloy fiber, the method further comprises the following steps: the control driving device drives the shape memory alloy fiber to reduce the twist to 0turn/cm (revolution/cm), so that the shape memory alloy fiber can generate more heat on the basis of ensuring the fatigue life of the shape memory fiber. For example, without this step, if the twist of the shape memory alloy fiber is increased based on the predetermined twist, the shape memory alloy fiber will be deformed more, resulting in a shorter fatigue life of the shape memory alloy fiber.

Similarly, the driving device is controlled to rotate to increase the twist of the shape memory alloy fiber; or controlling the driving device to stretch the shape memory alloy fiber; or after controlling the first driving device to stretch the shape memory alloy fiber and controlling the second driving device to rotate so as to increase the twist of the shape memory alloy fiber, the method further comprises the following steps: the control driving device drives the shape memory alloy fiber to restore the initial state.

Optionally, the control driving device drives the shape memory alloy fiber to twist around the axis at a rate of 1-50 turn/s (revolutions per second), the control driving device drives the shape memory alloy fiber to compress or stretch along the axis at a load of 100-500 MPa, the control driving device drives the shape memory alloy fiber to twist around the axis at a rate of more than 50turn/s, so that the twist of the shape memory alloy fiber is rapidly increased in a short time, the fatigue life of the shape memory alloy fiber is short, the control driving device drives the shape memory alloy fiber to compress or stretch along the axis at a load of 100-500 MPa, and when the compression or stretching load is less than 100MPa, the deformation of the shape memory alloy fiber is small, and the absorbed or released energy is small; when the load in compression or tension is more than 500MPa, the fatigue life of the shape memory alloy fiber is short.

Based on the above embodiment, after the control driving device drives the shape memory alloy fiber to rotate at a speed of 1-50 turn/s, the preset time is continued, and since the product of the twist of the shape memory alloy fiber and the length of the shape memory alloy fiber is equal to the product of the speed of the shape memory alloy fiber and the time, the preset time is set, so that the target twist of the shape memory alloy fiber can be accurately controlled. For example, if the target twist of the shape memory alloy fiber is 1turn/cm (revolutions/cm), the length of the shape memory alloy fiber is 5cm, and the speed at which the control driving device drives the shape memory alloy fiber to rotate is 1turn/s, the preset time can be 5 s.

Similarly, after the control driving device drives the shape memory alloy fiber to compress or stretch along the axial direction of the shape memory alloy fiber to 100-500 MPa, the method further comprises the step of lasting for a preset time, wherein the preset time is equal to the preset time for the control driving device to drive the shape memory alloy fiber to rotate.

The following describes how much heat is absorbed or released by the shape memory alloy fiber when the driving motor drives the different shape memory alloy fibers to extend and/or rotate along the axial direction of the shape memory alloy fiber in the embodiments of the present invention with reference to several specific embodiments.

Alternatively, Ni with a diameter of 0.5mm is used_52.6-Ti_47.4The shape memory alloy fiber is twisted at a twisting speed of 50turn/s by selecting a servo motor with the model number of 80AEA07530-SC3, so that the twist of the shape memory alloy fiber is increased to 1 turn/cm. Under the condition of room temperature, the temperature of the surface of the condensing plate is raised by 16 ℃, which is beneficial to melting the grease condensed on the surface of the condensing plate, thereby improving the cleaning convenience of the grease on the surface of the condensing plate.

Alternatively, Ni with a diameter of 0.5mm is used_50.5-Ti_49.5The shape memory alloy fiber is drawn by a linear motor with the model number of CH 0412-III-Q under the load of 100 MPa. Under the condition of room temperature, the temperature of the surface of the condensing plate is raised by 14 ℃, which is beneficial to melting the grease condensed on the surface of the condensing plate, thereby improving the cleaning convenience of the grease on the surface of the condensing plate.

Alternatively, Ni with a diameter of 0.5mm is used_50.5-Ti_49.5The shape memory alloy fiber is twisted at a twisting speed of 30turn/s by a servo motor of 80AEA07530-SC3 to increase the twist to 1turn/cm, and stretched at a load of 100MPa by a linear motor of CH 0412-III-Q. Under the condition of room temperature, the temperature of the surface of the condensing plate rises by 24 ℃, thereby further improving the cleaning convenience of the greasy dirt on the surface of the condensing plate.

Alternatively, Ni of 2mm diameter is used_52.6-Ti_47.4The shape memory alloy fiber is untwisted at a untwisting rate of 10turn/s by selecting a servomotor of 80AEA07530-SC3, and the twist of the shape memory alloy fiber is reduced to 0 turn/cm. At room temperatureThe temperature of the surface of the condensing plate is reduced by 18 ℃, which is beneficial to condensing and condensing the grease in the oil smoke on the surface of the condensing plate, thereby improving the condensing and separating effects of the condensing plate on the oil smoke.

Alternatively, Ni of 1mm in diameter is used_50.5-Ti_49.5The shape memory alloy fiber is compressed by a linear motor with the model number of CH 0412-III-Q under the load of 500 MPa. Under the condition of room temperature, the temperature of the surface of the condensing plate is reduced by 12 ℃, which is beneficial to condensing and condensing grease in the oil smoke on the surface of the condensing plate, thereby improving the condensing and separating effects of the condensing plate on the oil smoke.

Alternatively, Ni of 1mm in diameter is used_50.5-Ti_49.5The shape memory alloy fiber is untwisted at a untwisting rate of 10turn/s by using a servo motor of 80AEA07530-SC3, the twist of the shape memory alloy fiber is reduced to 0turn/cm, and a linear motor of CH 0412-III-Q is selected to compress the shape memory alloy fiber under a load of 500 MPa. Under the condition of room temperature, the temperature of the surface of the condensing plate is reduced by 21 ℃, so that the condensing and separating effects of the condensing plate on the oil smoke are further improved.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A range hood, comprising:

the air conditioner comprises a machine body, a fan and a controller, wherein an air inlet is formed in the machine body;

a soot passage defined in the body and communicating with the air inlet;

the condensing plate is arranged on the machine body and is positioned at the air inlet or in the oil smoke channel;

shape memory alloy fibers disposed inside the cold plate;

a driving device for driving the shape memory alloy fiber to twist around the axial direction thereof so as to change the twist of the shape memory alloy fiber and/or to stretch and contract along the axial direction thereof.

2. The range hood of claim 1, further comprising:

the condensing plate is of a hollow structure, and the heat conduction material is filled in the condensing plate and submerges the shape memory alloy fibers.

3. The range hood of claim 1, wherein the shape memory alloy fibers are a plurality of shape memory alloy fibers, and the shape memory alloy fibers are arranged at intervals.

4. The range hood of claim 3, wherein the drive device comprises:

a drive member;

the driving piece is connected with the driving piece;

the end parts of the shape memory alloy fibers are respectively and fixedly provided with at least one driven part, and the driving part can drive the driven parts to rotate.

5. The range hood of claim 3, wherein the drive device comprises:

a drive member;

the driving piece is connected with the moving piece to drive the moving piece to move along the axis direction of the shape memory alloy fibers, and the end parts of the shape memory alloy fibers are fixedly connected with the moving piece.

6. The range hood of claim 3, wherein the drive device comprises:

a first drive arrangement, the first drive arrangement comprising:

a first driving member;

the first driving piece is connected with the first driving piece;

the first driving piece can drive the first driven pieces to rotate;

a second drive device, the second drive device comprising:

a second driving member;

and the second driving part is connected with the second moving part to drive the moving part to move along the axis direction of the shape memory alloy fibers, one ends of the shape memory alloy fibers are respectively and fixedly provided with at least one first driven part, and the other ends of the shape memory alloy fibers are fixedly connected with the moving part.

7. The range hood of claim 4, wherein the driving member is a driving motor; the driving part is a belt; the follower is the band pulley, and a plurality of the band pulley all with the belt meshing.

8. The range hood of claim 5, wherein the driving member is a linear motor, the extension direction of the output shaft of the linear motor is consistent with the axial direction of the shape memory alloy, and the moving member is a connecting rod.

9. The range hood of claim 6, wherein the first drive member is a drive motor; the first driving part is a belt; the first driven member is a belt wheel, and a plurality of belt wheels are all meshed with the belt; the second driving piece is a linear motor, the telescopic direction of an output shaft of the linear motor is consistent with the axial direction of the shape memory alloy, and the second moving piece is a connecting rod.

10. The range hood of claim 1, wherein the shape memory alloy fibers can be any one or more of Cu-based shape memory alloy fibers, Ni-Ti-based shape memory alloy fibers, or Ni-Mn-based shape memory alloy fibers.