CN104704246B

CN104704246B - Ventilation unit

Info

Publication number: CN104704246B
Application number: CN201380052347.4A
Authority: CN
Inventors: 西格弗里德-塞巴斯蒂安·奥特迈尔; 格奥尔基-米尔恰·塞库利
Original assignee: China Refrigeration Co Ltd
Current assignee: China Refrigeration Co Ltd
Priority date: 2012-10-08
Filing date: 2013-09-19
Publication date: 2017-07-11
Anticipated expiration: 2033-09-19
Also published as: DE102012218286A1; WO2014056692A1; CN104704246A; UA112607C2; EP2898219B1; EP2898219A1; RU2596704C1

Abstract

The present invention relates to a kind of ventilation unit for being particularly used for heat exchanger.The ventilation unit has the impeller (12) that can be rotated to support in ventilator housing (18).Wherein, at least grading ring is around impeller and has the cavity (24) upwardly extend, the inside setting firing equipment (22) in cutting for impeller on tangential for ventilator housing.

Description

Ventilation unit

Technical field

The present invention relates to a kind of ventilation unit, more particularly to a kind of axial fan, it has and can be rotated to support on Impeller in ventilator housing.

Background technology

A kind of ventilation unit, is applied on the heat exchanger that such as cooling device is used.In ventilation unit or distribution When the heat exchanger or equipment of ventilation unit run, and/or due to the environment temperature for existing, can be formed and condensed upon on ventilation unit Condensed water.If this condensation water freezing, the ice for causing interference with can be particularly formed in the region of ventilator housing.Can go out The phenomenon that the ice that now such as impeller is formed between ventilator housing and impeller is blocked.

Above mentioned problem is not only limited to such case, i.e., in the state of ventilation unit disconnection, ice is formed and hinders ventilation Device puts into operation.In principle, during ventilation unit runs, it is also possible to engender the ice sheet for interfering.

The content of the invention

The purpose of the present invention therefore that, there is provided it is a kind of that with reliability service and the ventilation unit of above mentioned problem can be avoided.Together When, the ventilation unit with firing equipment can be with durable in use and inexpensively manufacture.

The purpose is achieved by the ventilation unit with feature described in claim 1.

Ventilator housing on tangential at least grading ring around impeller, wherein, ventilator housing have impeller it is tangential on The cavity of the firing equipment that the with good grounds present invention in extend, the inside is set.

In other words, ventilation unit uses firing equipment, to eliminate the formation of ice or to be melted in the radial extremity of impeller The ice existed and the region of ventilator housing wound impeller between.To protect firing equipment and making what is produced by firing equipment Discharge in exterior space of the heat to ventilation unit away from impeller is not undesirable minimum, and firing equipment is arranged at outer In the cavity extended at least partially about impeller of shell.It is self-evident, it is not that all parts of firing equipment are all necessarily placed at In cavity.The single part of firing equipment can also be at least partially disposed in the outside of cavity.Importantly, using cavity Conveying heat, to heat ventilator housing.

In principle, every dangerous place for forming interference ice, can use ventilation unit of the invention.It is logical Wind apparatus can for example be used in the equipment for placing temperature that is outdoor and therefore bearing there.Particularly ventilation unit is distributed To heat exchanger.Additionally, heat exchanger on cooling device using and play a part of evaporator or condenser there.

Firing equipment can be arranged in ventilator housing by producer.But firing equipment can also be in ventilation unit in principle Positioned in cavity after delivery.For example, it is also possible to install additional when needed with the ventilator housing with the above-mentioned type cavity Ventilation unit.That is, ventilation unit is such as just arranged on the heating in cavity afterwards during maintenance of equipment Equipment and corresponding control device.Additionally, firing equipment can easily be removed when breaking down and repair or change.

Other embodiment of the invention is explained in the claims, specification and drawings.

According to an implementation method, cavity and/or firing equipment it is tangential on be at least segmented, particularly entirely around impeller.Though Right principle upper plenum and/or firing equipment not exclusively wound impeller can extend.But in many cases, fact proved, it is practical Be the cavity and/or corresponding firing equipment with tangential upper closing.

One heat-conducting piece can be set between firing equipment and impeller, and the heat so as to firing equipment is produced has pin To property and be especially evenly distributed in ventilator housing in the region of impeller.Got in touch with this, concept " between " It shall be understood that heat-conducting piece is diametrically, that is, on the direction of impeller rotating shaft, be arranged on firing equipment with Between impeller.

Firing equipment directly or indirectly can be fixed on heat-conducting piece.For example, heat-conducting piece can have is fixedly connected piece, lead to Cross this and be fixedly connected piece, firing equipment can be fixed on heat-conducting piece.According to being fixedly connected in piece manufacturing technology preferred mode, This is fixedly connected piece can body composition with heat-conducting piece.Firing equipment and heat-conducting piece can be pre-installed and then jointly by producer first Positioned in cavity during installation or as add-on parts.

Particularly heat-conducting piece it is tangential on be at least segmented, preferably completely wound impeller.

In order to effectively utilize the heating power of firing equipment, heat-conducting piece can be with firing equipment and ventilator housing heat conduction Contact.Particularly heat-conducting piece can have directly contact with the part.To improve leading between heat-conducting piece and ventilator housing Thermo-contact, heat-conducting piece can include clamping device, and by the clamping device, heat-conducting piece can be compacted to ventilator housing.

According to an implementation method, in the wall of heat-conducting piece insertion ventilator housing, the wall be arranged on firing equipment and impeller it Between with limits.It is envisioned that heat-conducting piece is completely embedded into the wall, so that the essentially all of surface of heat-conducting piece is led to The material of blower housing is surrounded.But at least part of heat-conducting piece can also be allowed to expose.Particularly table of the heat-conducting piece near firing equipment Face, by so setting, covers its material for not being vented machine shell, so as to make to be produced between firing equipment and heat-conducting piece Raw directly contact as far as possible.

But heat-conducting piece can also be a separate part being arranged in cavity.Particularly heat-conducting piece is board.To change It is kind from firing equipment via region heat conduction from heat-conducting piece to the close impeller of ventilator housing, heat-conducting piece is particularly can be close to plane On the wall being previously mentioned.

Heat-conducting piece can include particularly by aluminium, steel or copper into metal tape.

An implementation method according to ventilation unit, firing equipment is banding.It can include at least one heater strip.Especially It is that firing equipment is formed by heater strip in the way of multiple windings.For between improvement heater strip and the part being in contact with it Heat conduction, heater strip can at least be segmented and be coated by the good metal braid of thermal conductivity.

In principal it is also possible to envisioning firing equipment includes heated fan, can be produced in cavity by the heated fan Hot blast can be sent into cavity hot blast.Heating medium can also be water, and water is heated in cavity or fed the water into cavity It is interior.

Ventilator housing can inexpensively be manufactured and produced with sufficiently stable structure type, i.e. the ventilator housing At least it is made up of plastic material in the region of cavity.The region of ventilator housing or shell entirety, for example can be by note Modeling manufacture.Applicable plastic material for example can be polypropylene.For make the thermal conduction characteristic of plastic material and/or mechanical property with it is each It is engaged from the requirement for existing, this plastic material can mix mineral filler.There is something special shows, with incorporation talcum powder Plastic material is made the ventilation unit of shell, the thawing speed that can be improved, it is possible to than having what is be made up of pure plastic material The ventilation unit of shell more efficiently eliminates interference ice sheet.

According to an implementation method, firing equipment and/or heat-conducting piece are in the axial direction parallel to the extension size of impeller rotating shaft Axially extending size equal to or more than impeller in its exterior lateral area.Particularly the axially extending size of heat-conducting piece is more than heating The axially extending size of equipment, that is to say, that heat-conducting piece is wider than firing equipment in this embodiment, so as to heat The heating power that equipment is produced is distributed on bigger region.

The heating power produced by firing equipment is connected with ventilator housing near the region of impeller, can improve It is there is heat-conducting cream, at least with heat conductive pad and/or heat-conductive bonding agent between firing equipment and heat-conducting piece.It is alternatively or attached Plus, the Thermal conductive additives may be between heat-conducting piece and ventilator housing, particularly not be embedded in ventilator housing in heat-conducting piece In the case of interior.

Brief description of the drawings

Below by way of example referring to the drawings by the way that preferred embodiment the present invention will be described.Wherein：

Fig. 1 show the ventilation unit according to first embodiment of the invention；

Fig. 2 show the sectional view of Fig. 1 illustrated embodiments；

Fig. 3-5 is respectively the sectional view of ventilation unit according to an embodiment of the present invention；

Fig. 6 show the top view of the heat-conducting piece together with the firing equipment being disposed thereon of an implementation method；

Fig. 6 a show the side view in region of heat-conducting piece shown in Fig. 6；

Fig. 7 show the top view of the heat-conducting piece together with clamping device of an implementation method；

Fig. 8 and 9 show an implementation method for connecting the selectable connected mode of the annular free end of heat-conducting piece；

Figure 10 and 11 show the heat-conducting piece of an implementation method together with the top view and profile for being fixedly connected piece；And

Figure 12 show the sectional view of the heater strip of an implementation method.

Specific embodiment

Fig. 1 show the ventilation unit 10 with impeller 12, and the impeller has the ventilating vane being arranged on sleeve 14 16.When ventilation unit 10 runs, impeller 12 revolves around it axle D rotations.

The radial outside of impeller 12 is surround by ventilator housing, and the ventilator housing leads in the implementation method shown in Fig. 1 Outer geosphere 18 is crossed to be formed.It is self-evident, it is also possible to which that the other shell moulding of the imagination, the circumference that it is formed is at least partially about leaf The boundary line of wheel.For example, circle 18 can be integrated with other shell parts, or circle 18 is fixed on these shell parts On.

Fig. 2 show the part (not faithful to former ratio) in the section of ventilation unit 10.The position of sectional plane is in Fig. 1 Represented with plane S.Because the structure of ventilation unit 10 is symmetrical on rotary shaft D on section, do not shown in Fig. 2 along rotation Axle D set out observation cross-sectional right side part view.

As described in beginning, shape in the gap area 20 between the free end of ventilating vane 16 and circle 18 Into ice impeller 12 can be caused to be stuck.This ice is produced with the case of sowing, such as gathered on the surface of circle 18 or blade 16 Condensed water is collected, it freezes there due to the temperature for existing.This point is particularly to be occurred in the case where impeller 12 is static. The problem introduced occurs for example in the case where ventilation unit to be distributed to the heat exchanger of cooling device.In cooling device fortune During row, ice can be formed on the blade of heat exchanger, it can be to having between the cooling agent and outside air that are imported by heat exchanger The heat exchange of effect has a negative impact, it is therefore necessary to be melted.The humidity produced during thawing can be condensed upon on ventilation unit lays equal stress on Newly freeze there.

If ventilation unit 10 is vertically set on using on position, that is to say, that rotary shaft D is in substantially horizontal flat On face.So, the region that ventilation unit 10 is in lower area especially can in most cases be influenceed by the ice for being formed, Because the water being condensate on ventilation unit 10 can downwards trickle and/or drip and freeze there.

For be melted in before ventilation unit 10 puts into operation the ice that has been formed and/or for prevent the preparatory stage just The ice of formation, ventilation unit 10 has the firing equipment 22 in the cavity 24 being arranged on inside circle 18, as being seen in fig. 2 As.Cavity 24 is formed by substantially U-shaped case member 26, and the part is closed by lid 28.The case member 26 of circle 18 Including radially inner side wall 26a and radial outside wall 26b near impeller 12.

Firing equipment 22 includes heating tape 30, and the heating tape plane is close on wall 26a, at least to be added with this degree The adjacent area of gas ket 18, even if gap area 20 is without ice or keeps without ice-like state.

By the way that firing equipment 22 to be arranged on the inside of circle 18, the firing equipment is reliably protected.Additionally, cavity 24 With insulating effect.That is, only a small amount of heat discharged by heating tape 30 is not utilized and just leaks into exterior space.Pass through Heating tape 30 and the directly contact of wall 26a, it is ensured that circle 18 is directly heated near the regions of gap area 20.

As already mentioned, it would however also be possible to employ other arbitrary shell mechanism substitution circles 18, in order to surround leaf The week side of boss circle of wheel 12.Importantly, at least there is the cavity with firing equipment in segmentation.In the ventilation unit 10 shown in Fig. 1 and 2 In, cavity 24 extends completely along circle 18.Heating tape 30 also entirely around impeller 12 so that equal everywhere on wall 26a is tangential Can be heated.But it is heated can also in principle only circumferential segment determined by heating collar 18 or scattered region, if If respective service condition is allowed or required.

For reliably anti-stagnant ice formation and effectively utilize input heating power as much as possible, wall 26a is in heating The region that equipment 22 is heated in axial direction is gone up, that is, on parallel to the direction of rotary shaft D, than the phase of ventilating vane 16 The extension size answered is bigger.

Fig. 3 show a kind of ventilation unit 10' of implementation method.With the implementation method 10 shown in Fig. 2 conversely, firing equipment 22 are formed here by heater strip 30' by multiple windings, rather than being directly on wall 26a.Heater strip 30' and wall 26a it Between be provided with a heat-conducting piece for collar shape 32, it is because the material of the heat-conducting piece has a good thermal conduction characteristic thus absorbable The major part sent by heater strip 30' heats heat and is sent to its large area to be close on superincumbent wall 26a, so as to equably Distribution of heat.It is to improve the heat conduction between foregoing single part, it is possible to use heat-conductive bonding agent, heat-conducting cream and/or lead Heat pad.

It is control firing equipment 22, can has switch or sensor, is interrupted when prespecified temperature is reached or subtracted Few power supply, to prevent overheat.This switch, such as Klixon or applicable sensor can be for example fixed on heat-conducting piece 32 And the heating power of firing equipment 22 is controlled on the basis of the temperature of heat-conducting piece 32.Certainly, it is that this can also control the temperature of wall 26a Degree.

Fig. 4 show the ventilation unit 10 of an implementation method ".In ventilation unit 10 " on also be provided with improve to wall 26a upload Pass the heat-conducting piece 32 of heat produced by firing equipment 22.With heat-conducting piece 32 in ventilation unit 10' located at the part separated with circle 18 The heat-conducting piece 32 of unlike upper, ventilation unit 10 " is embedded in wall 26a, for example, be molded into the wall 26a of case member 26. Thus can heat conduction particularly well between heat-conducting piece 32 and wall 26a.For make can be direct between firing equipment 22 and heat-conducting piece 32 Heat conduction, heat-conducting piece 32 is near the surface of firing equipment 22 not by the material covering of circle 18.

It is determined that service condition under, preferably heat-conducting piece 32 be different from Fig. 4 shown in structure, its completely with wall 26a Integration, as the ventilation unit 10 in an implementation method " ' in situation (referring to Fig. 5).

Although ventilation unit 10,10', 10 ", 10 " ' have and enclose 18 geometry moulding as similar as possible, do not say And explain, the size of circle 18 determines and its moulding can be with unrestricted choice, with the requirement for considering to be individually present.Analogue is also fitted For firing equipment 22, the design of its geometry or its power designs can be engaged with situation about being individually present.

Circle 18 can be made of metal in principle.But fact proved, additionally, for cost reasons, it is preferred that circle 18 by Plastic material, particularly polypropylene are made.By improve use material thermal conduction characteristic, this material can mix talcum powder. Thus the heat for producing firing equipment 22 is more rapid and is distributed more uniformly across.Fact proved, it is adaptable to manufacture heat-conducting piece 32 material has copper, aluminium and steel.

Fig. 6 show heat-conducting piece 32, and the heat-conducting piece is not fully distributed with firing equipment 22 on tangential, to consider This fact, i.e., form ice and often mainly use appearance in the lower area on position in ventilation unit for the above reasons. Additionally, marking out one in Fig. 6 in Fig. 6 a with the region shown in side view amplification.

Fig. 6 a show the side view of heat-conducting piece 32, to illustrate that firing equipment 22 includes the multi-turn between the end points E that is laid in Interior heater strip 30'.That is, heater strip 30' only covers the circumferential area that heat-conducting piece 32 is between end points E.Do not say and Analogy, heat-conducting piece 32 have to be not necessarily a closed loop.

Fig. 7 show a heat-conducting piece 32 formed basically by open loop.Two unlimited end tools of heat-conducting piece 32 There is connection sheet 34, they can be tensed by clamping device 36.Clamping device 36 includes bolt 37 in the example shown in Fig. 7, The collective effect of bolts and nuts 38, so as to clamp the heat-conducting piece 32 of annular.If tightening nut 38, then heat-conducting piece 32 The wall 26a of cavity 24 is pressed towards, thus heat-conducting piece plane is on wall 26a, and it is possible thereby to carries out effective heat transfer.

It is self-evident, it may also be envisaged that clamping device 36 can be made up of other.The cable of preferred metal can for example be used Folder, because meeting is aging at a temperature of usually used plastics occur when firing equipment 22 runs and becomes fragile or fractures.Such as Fig. 8 institutes Show, it is also possible to replace bolt 37 and nut 38, U-clamp to be embedded in and be made up of the free end of heat-conducting piece 32 using the clip of U-shaped Canned paragraph 40 in.Canned paragraph 40 can be produced for example, by punching press and/or extruding, so as to produce the arm that can be embedded in clip 39 Through hole.The U-shaped moulding of clip 39 assigns the characteristic of its elasticity, and the stress of heat-conducting piece 32 is determined by this characteristic.Do not say and Analogy, can have the canned paragraph 40 (shown in dotted line) that multiple skews are set, to make the radius of heat-conducting piece 32 respective with cavity 24 The geometry of presence is engaged.In this regard, the free end of heat-conducting piece 32 can be with completely overlapped.

Fig. 9 show a kind of selectable connected mode in free end of heat-conducting piece 32, with the implementation method phase shown in Fig. 7 Instead, it includes two connection sheet 34' for upwardly extending of cutting in heat-conducting piece 32.Connection sheet 34' is mutual by heart axle or pin 41 Connection.

Firing equipment 22 can be reliably and efficiently fixed on heat-conducting piece 32 according to plain mode, shown in Figure 10 The heat-conducting piece 32 of implementation method have be fixedly connected piece 43.It is fixedly connected the band of piece 43 and setting firing equipment 22 on heat-conducting piece 32 Shape accommodating section 45 is monolithically fabricated.It is to fix there firing equipment 22, piece 43 will be fixedly connected and be bent, until they will heating Equipment is fixed and presses to accommodating section 45.Being monolithically fabricated for connection sheet 43 and accommodating section 45, on the one hand can make heat-conducting piece 32 by identical Board be simply made, on the other hand, it is also possible to connection sheet 43 is absorbed the heat that is produced by firing equipment 22 and is continued to pass Lead.

Figure 11 show the sectional view of the heat-conducting piece 32 together with firing equipment installed above 22 of Figure 10 illustrated embodiments.With The heater strip 30' that the mode of multiple windings is arranged on the accommodating section 45 on heat-conducting piece 32 passes through the connection sheet 43 for bending by reliably It is fixed.

It is to use the heating coated by the good material of thermal conductivity that the heating power for producing firing equipment 22 is obtained improved Silk 30'.Figure 12 show the heater strip 30' of this implementation method.The core of heater strip 30' is formed by electric conductor 47, the conduction Body is surrounded by for example corresponding plastics of heat-resisting insulator 49.Insulator 49 again by the braid of metal, particularly by with height The aluminium braid of thermal conductivity is surrounded.

Reference text

10th, 10', 10 ", 10 " ' ventilation unit

12 impellers

14 sleeves

16 ventilating vanes

18 outer geospheres

20 gap areas

22 firing equipments

24 cavitys

26 case members

26a, 26b wall

28 lids

30 heating tapes

30' heater strips

32 heat-conducting pieces

34th, 34' connection sheets

36 clamping devices

37 bolts

38 nuts

39 clips

40 canned paragraphs

41 pins

43 are fixedly connected piece

45 accommodating sections

47 electric conductors

49 insulators

51 metal braids

D rotary shafts

S tangent lines

E end points

Claims

1. a kind of ventilation unit, it is characterised in that with the impeller (12) that can be rotated to support in ventilator housing (18), its In, the ventilator housing (18) on tangential at least grading ring around the impeller (12) and with cutting in the impeller (12) Upwardly extending, the inside sets the cavity (24) of firing equipment (22), wherein, the firing equipment (22) and the impeller (12) Between be provided with a heat-conducting piece (32)；The heat-conducting piece (32) can heat conduction with firing equipment (22) and the ventilator housing (18) Ground contact；The heat-conducting piece (32) at least segmentation on tangential completely surrounds the impeller (12).

2. ventilation unit according to claim 1, it is characterised in that the ventilation unit is the ventilation for heat exchanger Device.

3. ventilation unit according to claim 1, it is characterised in that the cavity (24) and/or the firing equipment (22) at least segmentation completely surrounds the impeller (12) on tangential.

4. ventilation unit according to claim 1, it is characterised in that the firing equipment (22) is fixed on the heat-conducting piece (32) on.

5. ventilation unit according to claim 4, it is characterised in that the heat-conducting piece (32) is with being fixedly connected piece (43) piece, is fixedly connected by described, the firing equipment (22) can be fixed on the heat-conducting piece (32), wherein, it is described Piece (43) is fixedly connected to be monolithically fabricated with the heat-conducting piece (32).

6. the ventilation unit according to any one of claim 1-5, it is characterised in that the heat-conducting piece (32) includes clamping Device (36), by the clamping device, heat-conducting piece (32) can be compacted to the ventilator housing (18).

7. the ventilation unit according to any one of claim 1-5, it is characterised in that the heat-conducting piece (32) is embedded described In the wall (26a) of ventilator housing (18), wall (26a) is arranged between the firing equipment (22) and the impeller (12) to limit Make the cavity (24).

8. the ventilation unit according to any one of claim 1-5, it is characterised in that the heat-conducting piece (32) is a list Only part.

9. ventilation unit according to claim 8, it is characterised in that the heat-conducting piece (32) is provided in the cavity (24) board in.

10. the ventilation unit according to any one of claim 1-5, it is characterised in that the heat-conducting piece (32) including by Aluminium, steel or copper into metal tape.

11. ventilation unit according to any one of claim 1-5, it is characterised in that the firing equipment (22) is band Shape.

12. ventilation unit according to any one of claim 1-5, it is characterised in that the firing equipment (22) be to Few one heater strip (30') coated by metal braid.

13. ventilation unit according to any one of claim 1-5, it is characterised in that the firing equipment (22) and/or The heat-conducting piece (32) is equal to or more than the impeller parallel to the extension size of the impeller (12) rotary shaft (D) in the axial direction (12) the axially extending size in its radial outside region.

14. according to any one of claim 1-5 ventilation unit, it is characterised in that the firing equipment (22) with it is described Ventilator housing (18), or the heat-conducting piece (32) and the ventilator housing (18), and/or the firing equipment (22) and institute Stating between heat-conducting piece (32) has heat-conducting cream, at least has heat conductive pad and/or heat-conductive bonding agent.