CN104704246A - Ventilator device - Google Patents

Abstract

The invention relates to a ventilator device, in particular for a heat exchanger. The ventilator device comprises an impeller (12) which is rotatably mounted in a ventilator housing (18). The ventilator housing surrounds at least portions of the impeller in the circumferential direction and has a cavity (24) which extends in the circumferential direction of the impeller and in which a heating device (22) is arranged.

Description

Ventilation plant

Technical field

The present invention relates to a kind of ventilation plant, particularly relate to a kind of axial fan, it has the impeller that can be rotated to support in ventilator housing.

Background technique

A kind of ventilation plant, the heat exchanger that such as cooling equipment adopts is applied.At ventilation plant or distribute the heat exchanger of ventilation plant or equipment runs time and/or the ambient temperature owing to existing, the condensed water condensed upon on ventilation plant can be formed.If this condensed water freezes, the ice causing disturbing particularly can be formed in the region of ventilator housing.There will be such as impeller and be formed on the phenomenon that the ice between ventilator housing and impeller blocks.

The problems referred to above are not only confined to this situation, and namely under the state of ventilation plant disconnection, ice is formed and hinders ventilation plant to put into operation.In principle, at ventilation plant run duration, the ice sheet causing interference also may be engendered.

Summary of the invention

Therefore object of the present invention is, provide a kind of can reliable operation and avoid the ventilation plant of the problems referred to above.Meanwhile, the ventilation plant with heating plant can manufacture durable in use and inexpensively.

This object is achieved by having the ventilation plant of feature described in claim 1.

Ventilator housing at least segmentation wound impeller on tangential, wherein, ventilator housing have impeller tangential on extend, the cavity of heating plant that the with good grounds the present invention in the inside is arranged.

In other words, ventilation plant uses heating plant, to eliminate the formation of ice or to be melted in the ice existed between the radial extremity of impeller and the region of ventilator housing wound impeller.The heat produced by heating plant for protection heating plant making is not undesirable minimizing to ventilation plant away from the discharge in the space outerpace of impeller, in the cavity that at least part of wound impeller that heating plant is arranged at shell extends.Self-evident, not that all parts of heating plant all must be arranged in cavity.The single constituent element of heating plant also can be arranged on the outside of cavity at least partly.Importantly, utilize cavity transfer heat, with heating ventilation machine shell.

In principle, every place forming the danger of interference ice, all can use according to ventilation plant of the present invention.Ventilation plant such as can place outdoor and therefore bear there temperature equipment on use.Particularly ventilation plant is distributed to heat exchanger.In addition, heat exchanger uses and plays the effect of vaporizer or condenser there on cooling equipment.

Heating plant can be arranged in ventilator housing by producer.But heating plant also can in cavity inner position after ventilation plant delivery in principle.Such as, the ventilation plant of the ventilator housing with band the above-mentioned type cavity can also be installed when needed additional.That is, ventilation plant afterwards, as being just arranged on heating plant in cavity and corresponding control apparatus in the process of device maintenance.In addition, heating plant can be removed easily and repair when breaking down or change.

Other mode of executions of the present invention are explained in the claims, specification and drawings.

According to a mode of execution, at least segmentation on cavity and/or heating plant are tangential, particularly wound impeller completely.Although cavity and/or heating plant can not exclusively extend by wound impeller in principle.But in many cases, fact proved, practical is have tangential closed cavity and/or corresponding heating plant.

A heat-conducting piece can be set between heating plant and impeller, the heat that heating plant produces can be evenly distributed in ventilator housing targetedly and particularly in the region of impeller.Get in touch with this, concept " between " should understand like this, namely heat-conducting piece is diametrically, namely perpendicular on the direction of impeller rotating shaft, is arranged between heating plant and impeller.

Heating plant can directly or indirectly be fixed on heat-conducting piece.Such as, heat-conducting piece can have and is fixedly connected with sheet, and be fixedly connected with sheet by this, heating plant can be fixed on heat-conducting piece.According to being fixedly connected with preferred mode in sheet manufacturing technology, this is fixedly connected with sheet and heat-conducting piece can be formed by body.Heating plant and heat-conducting piece can pre-installation and subsequently common by producer when first installation or as adding piece installing in cavity inner position.

Particularly heat-conducting piece tangential at least segmentation, preferably wound impeller completely.

In order to the heating power of heating plant effectively can be utilized, heat-conducting piece can with heating plant and ventilator housing thermal conductive contact.Particularly heat-conducting piece can have with described parts and directly contacts.For improving the thermal conductive contact between heat-conducting piece and ventilator housing, heat-conducting piece can comprise clamp device, and by this clamp device, heat-conducting piece can be compacted to ventilator housing.

According to a mode of execution, heat-conducting piece embeds in the wall of ventilator housing, and this wall is arranged between heating plant and impeller with limits.Can imagine, heat-conducting piece embeds in described wall completely, thus the substantially all surface of heat-conducting piece is all surrounded by the material of ventilator housing.But at least part of heat-conducting piece also can be allowed to expose.Particularly heat-conducting piece is near the surface of heating plant, by such setting, makes it does not covered by the material of ventilator housing, so that can make to produce between heating plant with heat-conducting piece as far as possible directly contacts.

But heat-conducting piece also can be a separate part being arranged in cavity.Particularly heat-conducting piece is board.For improving from heating plant via the region heat conduction of heat-conducting piece to the close impeller of ventilator housing, heat-conducting piece particularly can plane be close on above-mentioned wall.

Heat-conducting piece can comprise the metal tape particularly become by aluminium, steel or copper.

According to a mode of execution of ventilation plant, heating plant is banded.It can comprise at least one heating wire.Particularly, heating plant being formed in the mode of multiple winding by heating wire.For improving the heat conduction between heating wire and the parts be in contact with it, heating wire can at least segmentation be coated by the metal braid that thermal conductivity is good.

In principle, also it is contemplated that heating plant comprises heated fan, hot blast can be produced by this heated fan in cavity and maybe hot blast can be sent in cavity.Heat medium also can be water, is heated by water or sent in cavity by water in cavity.

Ventilator housing can manufacture and produces with sufficiently stable structural type inexpensively, and namely this ventilator housing is at least made up of plastic materials in the region of cavity.This region of ventilator housing or housing integration, such as, can be manufactured by injection moulding.The plastic materials be suitable for can be such as polypropylene.For making the thermal conduction characteristic of plastic materials and/or mechanical property match with the requirement existed separately, this plastic materials can mix mineral filler.There is something special shows, has and mixes the ventilation plant that talcous plastic materials makes shell, the thawing speed that can improve, and more effectively can eliminate interference ice sheet than the ventilation plant with the shell be made up of pure plastic materials.

According to a mode of execution, the extension size that heating plant and/or heat-conducting piece are parallel to impeller rotating shaft is in the axial direction equal to or greater than the axis extension size of impeller in its exterior lateral area.Particularly the axis of heat-conducting piece extends the axis extension size that size is greater than heating plant, and that is, heat-conducting piece is wider than heating plant in this embodiment, the heating power that heating plant produces can be distributed on larger region.

The heating power produced by heating plant is connected with the region of ventilator housing near impeller, can improve, have heat-conducting cream between heating plant and heat-conducting piece, at least has heat conductive pad and/or heat-conductive bonding agent.As selection or additional, described heat conduction auxiliary agent can be between heat-conducting piece and ventilator housing, particularly when heat-conducting piece does not embed in ventilator housing.

Accompanying drawing explanation

Below by way of example with reference to accompanying drawing by preferred embodiment the present invention will be described.Wherein:

Figure 1 shows that the ventilation plant according to first embodiment of the invention;

Figure 2 shows that the sectional view of Fig. 1 illustrated embodiment;

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

Figure 6 shows that the plan view of the heat-conducting piece of a mode of execution together with heating plant disposed thereon;

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

Figure 7 shows that the plan view of heat-conducting piece together with clamp device of a mode of execution;

Fig. 8 and 9 is depicted as the selectable Placement of annular free end for being connected heat-conducting piece of a mode of execution;

Figure 10 and 11 is depicted as the heat-conducting piece of a mode of execution together with the plan view and the sectional drawing that are fixedly connected with sheet; And

Figure 12 shows that the sectional view of the heating wire of a mode of execution.

Embodiment

Figure 1 shows that the ventilation plant 10 with impeller 12, this impeller has the ventilating vane 16 be arranged on sleeve 14.When ventilation plant 10 runs, impeller 12 rotates around running shaft D.

The radial outside of impeller 12 by ventilator housing around, this ventilator housing is formed by outer geosphere 18 in the mode of execution shown in Fig. 1.Self-evident, also can imagine other shell moulding, the boundary line of its at least part of wound impeller of circumference formed.Such as, circle 18 can be integrated with other shell constituent element, or circle 18 is fixed on these shell constituent elements.

Figure 2 shows that the part (not faithful to former ratio) in ventilation plant 10 cross section.The position of sectional plane represents by planar S in FIG.Because the structure of ventilation plant 10 is symmetrical about running shaft D on cross section, so do not show the view of the cross-sectional right side part of observing of setting out along running shaft D in Fig. 2.

As described in beginning, the ice formed in the gap area 20 between the free end of ventilating vane 16 and circle 18 can cause impeller 12 to be stuck.This ice is producing with in the situation of sowing, and the surface of circle 18 or blade 16 such as, have accumulated condensed water, and it is frozen in there due to the temperature existed.This point particularly occurs when impeller 12 is static.The problem introduced such as occurs when ventilation plant being distributed to the heat exchanger of cooling equipment.When cooling equipment runs, the blade of heat exchanger can form ice, it can be had a negative impact to heat exchange effective between the freezing mixture imported by heat exchanger and ambient air, therefore must be melted.The humidity produced during thawing can condense upon on ventilation plant and also again be frozen in there.

If ventilation plant 10 is vertically set on use position, that is, running shaft D is in substantially horizontal plane.So, ventilation plant 10 is in the impact of the ice that the region in lower area in most cases can be formed especially, because the water be condensate on ventilation plant 10 can trickle downwards and/or drips and be frozen in there.

For being melted in the ice that formed before ventilation plant 10 puts into operation and/or for preventing the ice just formed in the preparatory stage, ventilation plant 10 has the heating plant 22 in the cavity 24 being arranged on circle 18 inside, as seen in fig. 2.Cavity 24 is formed by the case member 26 of U-shaped substantially, and these parts are closed by lid 28.The case member 26 of circle 18 comprises radially inner side wall 26a and the radial outside wall 26b of close impeller 12.

Heating plant 22 comprises heating tape 30, and this heating tape plane is close on wall 26a so that at least with the adjacent area of this degree heating collar 18, even if gap area 20 without ice or keep without ice-like state.

By heating plant 22 being arranged on the inside of circle 18, this heating plant is protected reliably.In addition, cavity 24 has insulating effect.That is, only have the heat of being discharged by heating tape 30 not on a small quantity to be utilized and just leak into space outerpace.Contacted with the direct of wall 26a by heating tape 30, guarantee that circle 18 is directly heated near the region of gap area 20.

As already mentioned, other arbitrary shell mechanisms also can be adopted to replace circle 18, so that all sides circle of wound impeller 12.Importantly, at least there is the cavity with heating plant in segmentation.In the ventilation plant 10 shown in Fig. 1 and 2, cavity 24 extends along circle 18 completely.Heating tape 30 also complete wound impeller 12, thus make wall 26a tangential on all can be heated everywhere.But also can only make the region of the determined circumferential segment of heating collar 18 or dispersion be heated in principle, if respective service condition allows or requirement.

For reliably anti-stagnant ice formation and effectively utilize input heating power as much as possible, the region that wall 26a heats in heating plant 22 is in axial direction gone up, namely on the direction being parallel to running shaft D, extend size accordingly than ventilating vane 16 larger.

Figure 3 shows that a kind of ventilation plant 10' of mode of execution.Contrary with the mode of execution 10 shown in Fig. 2, heating plant 22 is here formed by multiple winding by heating wire 30', instead of is directly on wall 26a.The heat-conducting piece 32 of a collar shape is provided with between heating wire 30' and wall 26a, material due to this heat-conducting piece has good thermal conduction characteristic, thus the major part heating heat that sent by heating wire 30' of Absorbable rod be sent to its large size and be close on superincumbent wall 26a, so that distribution of heat equably.For improving the heat conduction between foregoing single parts, heat-conductive bonding agent, heat-conducting cream and/or heat conductive pad can be used.

For controlling heating plant 22, switch or sensor can be had, interrupting when reaching prespecified temperature or reducing power supply, overheated to prevent.Such as can by this switch, such as Klixon or applicable sensor to be fixed on heat-conducting piece 32 and on the basis of heat-conducting piece 32 temperature, to control the heating power of heating plant 22.Certainly, also can control the temperature of wall 26a for this reason.

Figure 4 shows that the ventilation plant 10 of a mode of execution ".At ventilation plant 10 " on be also provided with improve to wall 26a upload pass heating plant 22 produce the heat-conducting piece 32 of heat.Be located at heat-conducting piece 32 in ventilation plant 10' and enclose on 18 parts separated unlike, ventilation plant 10 " heat-conducting piece 32 be embedded in wall 26a, be such as injected in the wall 26a of case member 26.Thus can heat conduction particularly well between heat-conducting piece 32 and wall 26a.For make between heating plant 22 and heat-conducting piece 32 can directly heat conduction, heat-conducting piece 32 is not covered by the material of circle 18 near the surface of heating plant 22.

Under the service condition determined, preferably heat-conducting piece 32 is different from the structure shown in Fig. 4, and it is completely integrated with wall 26a, the ventilation plant 10 as at a mode of execution " ' in situation (see Fig. 5).

Although ventilation plant 10,10', 10 ", 10 " ' there is the geometrical shape moulding similar as far as possible with circle 18, self-evidently, the size of circle 18 is determined can unrestricted choice with its moulding, to consider the requirement that exists separately.Analogue is also applicable to heating plant 22, and its geometry design or its power designs can match with situation about existing separately.

Enclose 18 in principle can be made of metal.But fact proved, in addition, for cost reason, preferably, circle 18 is by plastic materials, and particularly polypropylene is made.By improve the thermal conduction characteristic of use material, this material can mix French chalk.The heat making heating plant 22 produce thus is more rapid and distribute more equably.Fact proved, the material being applicable to manufacture heat-conducting piece 32 has copper, aluminium and steel.

Figure 6 shows that heat-conducting piece 32, this heat-conducting piece is also not exclusively distributed with heating plant 22 on tangential, to consider this fact, is namely formed for the above reasons in the lower area of ice often mainly on ventilation plant use position and occurs.In addition, one is marked out in Fig. 6 in Fig. 6 a with the region shown in side view amplification.

Fig. 6 a is depicted as the side view of heat-conducting piece 32, to illustrate that heating plant 22 comprises the heating wire 30' in the multi-turn that is laid between end points E.That is, heating wire 30' only covers heat-conducting piece 32 and is in circumferential area between end points E.Self-evident, heat-conducting piece 32 have to be not necessarily a closed loop.

Figure 7 shows that a heat-conducting piece 32 formed basically by open loop.The unlimited end of two of heat-conducting piece 32 has connecting sheet 34, and they can be strained by clamp device 36.The example of clamp device 36 shown in Fig. 7 comprises bolt 37, this bolts and nuts 38 acting in conjunction, can clamp the heat-conducting piece 32 of annular.If fastening nut 38, so heat-conducting piece 32 is pressed towards the wall 26a of cavity 24, and heat-conducting piece plane is on wall 26a thus, and can carry out effective heat transfer thus.

Self-evident, also it is contemplated that clamp device 36 can be made up of other.Such as can use the cable clip of preferable alloy, because can be aging and become fragile or fracture at the temperature that occurs when heating plant 22 runs of normally used plastics.As shown in Figure 8, the clip of U-shaped also can be used to replace bolt 37 and nut 38, U-shaped clip is embedded in the holding part 40 that is made up of the free end of heat-conducting piece 32.Holding part 40 can be produced by such as punching press and/or extruding, thus produces the through hole that can embed the arm of clip 39.The U-shaped moulding of clip 39 gives its flexible characteristic, by the stress of this characteristic determination heat-conducting piece 32.Self-evident, the holding part 40 (shown in dotted line) that multiple skew is arranged can be had, so that the geometrical shape making the radius of heat-conducting piece 32 and cavity 24 exist separately matches.In this regard, the free end of heat-conducting piece 32 can be completely overlapping.

Figure 9 shows that a kind of selectable Placement of the free end of heat-conducting piece 32, contrary with the mode of execution shown in Fig. 7, it comprise two heat-conducting piece 32 tangential on the connecting sheet 34' of extension.Connecting sheet 34' is interconnected by axle or pin 41.

For reliably and being effectively fixed on heat-conducting piece 32 by heating plant 22 according to plain mode, the heat-conducting piece 32 of the mode of execution shown in Figure 10 has and is fixedly connected with sheet 43.Be fixedly connected with banded accommodating section 45 entirety sheet 43 and heat-conducting piece 32 being arranged heating plant 22 to form.For heating plant 22 being fixed on there, sheet 43 will being fixedly connected with and bending, until heating plant is fixedly pressed to accommodating section 45 by them.The entirety of connecting sheet 43 and accommodating section 45 is formed, and heat-conducting piece 32 can be made simply to be made up of identical board on the one hand, and on the other hand, the heat that connecting sheet 43 also can be made to absorb produced by heating plant 22 also continues conduction.

Figure 11 shows that the heat-conducting piece 32 of Figure 10 illustrated embodiment is together with the sectional view installing heating plant 22 above.The heating wire 30' being arranged on the accommodating section 45 on heat-conducting piece 32 in the mode of multiple winding is reliably fixed by bending connecting sheet 43.

The heating power that heating plant 22 is produced is improved, and uses by the coated heating wire 30' of the material that thermal conductivity is good.Figure 12 shows that the heating wire 30' of this mode of execution.The core of heating wire 30' is formed by electric conductor 47, and this electric conductor is surrounded by heat-resisting insulator 49 such as corresponding plastics.Insulator 49, again by the braided fabric of metal, is particularly surrounded by the aluminium braided fabric with high thermal conductivity.

Reference text

10,10', 10 ", 10 " ' ventilation plant

12 impellers

14 sleeves

16 ventilating vanes

18 outer geospheres

20 gap areas

22 heating plants

24 cavitys

26 case members

26a, 26b wall

28 lids

30 heating tapes

30' heating wire

32 heat-conducting pieces

34,34' connecting sheet

36 clamp devices

37 bolts

38 nuts

39 clips

40 holding parts

41 pins

43 are fixedly connected with sheet

45 accommodating section

47 electric conductors

49 insulators

51 metal braid

D running shaft

S tangent line

E end points

Claims (15)

1. a ventilation plant, especially for the ventilation plant of heat exchanger, it is characterized in that, there is the impeller (12) that can be rotated to support in ventilator housing (18), wherein, described ventilator housing (18) on tangential at least grading ring around described impeller (12) and tangential upper that extend, that the inside arranges heating plant (22) cavity (24) had at described impeller (12).

2. ventilation plant according to claim 1, is characterized in that, described cavity (24) and/or described heating plant (22) at least segmentation on tangentially, particularly fully around described impeller (12).

3. ventilation plant according to claim 1 and 2, is characterized in that, is provided with a heat-conducting piece (32) between described heating plant (22) and described impeller (12).

4. ventilation plant according to claim 3, is characterized in that, described heating plant (22) is fixed on described heat-conducting piece (32).

5. ventilation plant according to claim 4, it is characterized in that, described heat-conducting piece (32) has and is fixedly connected with sheet (43), sheet is fixedly connected with by described, described heating plant (22) can be fixed on described heat-conducting piece (32), wherein, be fixedly connected with sheet (43) described in preferably to form with described heat-conducting piece (32) entirety.

6. the ventilation plant according to item at least one in claim 3-5, is characterized in that, described heat-conducting piece (32) at least segmentation on tangentially, particularly fully around described impeller (12).

7. the ventilation plant according to item at least one in claim 3-6, is characterized in that, described heat-conducting piece (32) can contact with heat conduction with heating plant (22) and described ventilator housing (18).

8. the ventilation plant according to item at least one in claim 3-7, it is characterized in that, described heat-conducting piece (32) comprises clamp device (36), and by described clamp device, heat-conducting piece (32) can be compacted to described ventilator housing (18).

9. the ventilation plant according to item at least one in claim 3-8, it is characterized in that, described heat-conducting piece (32) embeds in the wall (26a) of described ventilator housing (18), and wall (26a) is arranged between described heating plant (22) and described impeller (12) to limit described cavity (24).

10. the ventilation plant according to item at least one in claim 3-9, is characterized in that, described heat-conducting piece (32) is independent parts, is particularly arranged on the board in described cavity (24).

11. ventilation plants according to item at least one in claim 3-10, is characterized in that, described heat-conducting piece (32) comprises the metal tape particularly become by aluminium, steel or copper.

12. ventilation plants according to item at least one in aforementioned claim, is characterized in that, described heating plant (22) is banded.

13. ventilation plants according to item at least one in aforementioned claim, is characterized in that, described heating plant (22) comprises at least one preferably by the heating wire (30') that metal braid is coated.

14. ventilation plants according to item at least one in aforementioned claim, it is characterized in that, the extension size that described heating plant (22) and/or described heat-conducting piece (32) are parallel to described impeller (12) running shaft (D) is in the axial direction equal to or greater than the axis extension size of described impeller (12) in its radial outside region.

15. according to the described ventilation plant of item at least one in aforementioned claim, it is characterized in that, described heating plant (22) and described ventilator housing (18), or described heat-conducting piece (32) and described ventilator housing (18), and/or between described heating plant (22) and described heat-conducting piece (32), there is heat-conducting cream, at least there is heat conductive pad and/or heat-conductive bonding agent.