CN101931314B - Electrical device and method for increasing protection grade of same - Google Patents
Electrical device and method for increasing protection grade of same Download PDFInfo
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- CN101931314B CN101931314B CN200910148128.1A CN200910148128A CN101931314B CN 101931314 B CN101931314 B CN 101931314B CN 200910148128 A CN200910148128 A CN 200910148128A CN 101931314 B CN101931314 B CN 101931314B
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Abstract
The invention discloses a method for increasing the protection grade of an electrical device. The electrical device comprises a heat radiator and a case and electrical elements, wherein the case and the electrical elements are installed outside the heat radiator, and the electrical elements comprise an element requiring heat radiation and a main electrical element. The method comprises the following steps of: respectively arranging the element requiring heat radiation and the main electrical element in a first space and a second space which are separated; only arranging heat radiating holes at the top of the first space; and installing the element requiring heat radiation on a printed circuit board, and installing the printed circuit board on the first space to seal the first space, wherein no wiring layer is formed on one side of the printed circuit board facing to the first space. The invention also provides the electrical device obtained by using the method. The heat radiation of the electrical device can be ensured by the method, the service life of the electrical device is prolonged, meanwhile, the protection grade of preventing people from approaching to dangerous components in the case and preventing solid foreign matter from entering the case is increased.
Description
Technical field
The present invention relates to a kind of electric equipment, and especially inverter, and relate to and improve this electric equipment and to prevent in human body proximity shell hazardous components and prevent solid foreign materials from entering the method for equipment protection grade in shell.
Background technology
Inverter is arranged in rack usually, and owing to usually needing to install other electric equipments on inverter, processing process to be carried out, as boring, like this to rack, just likely there is such risk, that is, foreign matter, the metal fragment produced of such as holing, drop in inverter by the louvre on inverter case top, cause fault.In addition, when constructing in rack, also there is the risk dropped to by the foreign matter such as small instruments and tools or screw in inverter case.
Owing to having louvre at inverter case top, can there is such risk, that is: operator or other staff do not note making finger or other positions of human body enter into louvre, and cause the accident of electric shock yet.
Therefore, in order to avoid there is above-mentioned danger, specify accordingly about the standard of degree of protection, as IEC60529 standard.
In order to overcome above mentioned problem, provide a solution, that is, in existing inverter case, the louvre at inverter case top installs one piece of detachable protective cover plate, thus prevents foreign matter or finger etc. from accidentally entering into louvre.By this method, the top of inverter can be made to reach IP41 degree of protection in IEC 60529 standard, that is: can prevent wire from touching hazardous components.But the problem that this method is brought is the electric component in inverter, as transformer, Capacitor banks etc. need the electric component of heat radiation to can not get efficiently radiates heat, and these need the electric component of heat radiation very large by the impact of temperature, if can not efficiently radiates heat, then can affect the useful life of appliance component.
Therefore; in use; user can pull down cover sheet usually voluntarily; improve the heat dispersion of inverter; but this makes again inverter top cannot meet IP41 standard above-mentioned; and IP20 level of protection can only be met, and make equipment can not to prevent in human body proximity shell hazardous components and prevent solid foreign materials from entering equipment in shell.
Summary of the invention
Therefore, a kind of electric equipment that improves is the object of the present invention is to provide to prevent in human body proximity shell hazardous components and prevent solid foreign materials from entering the method for equipment protection grade in shell, utilize the method, the radiating condition of inverter can be met simultaneously, ensure the working life of radiating element.In addition, present invention also offers and a kind ofly utilize the method to improve to prevent in human body proximity shell hazardous components and prevent solid foreign materials from entering the electric equipment of equipment protection grade in shell.
According to an aspect of the present invention, provide a kind of electric equipment that improves to prevent in human body proximity shell hazardous components and prevent solid foreign materials from entering the method for equipment protection grade in shell, described electric equipment comprises: radiator, be arranged on housing outside radiator and electric component, described electric component comprises element and the major electrical components of needs heat radiation, and described method comprises: the element dispel the heat described needs and described major electrical components are arranged at mutually in separated first space and second space respectively; Only louvre is set at the top in the first space; And the described element of heat radiation that needs is installed on a printed circuit, this printed circuit board (PCB) is arranged on described first spatially, and does not form wiring layer on the side of this printed circuit board (PCB) towards the first space.
Preferably, utilize dividing plate that the space in described housing is separated into described first space and second space, described dividing plate and described housing are integrally formed.
Alternatively, described first space can be arranged in radiator body, and described second space is arranged in described housing.
Preferably, the described element of heat radiation that needs is installed near described printed circuit board (PCB), makes the gap between the element of described needs heat radiation and described printed circuit board (PCB) be less than 1 millimeter.As an alternative, in described needs, between the element of heat radiation and described printed circuit board (PCB), seal washer is set.
The described component outer surface insulation needing heat radiation, and be the combination of any one or they in capacitor, relay, resistor, inductor, power model.
To prevent in human body proximity shell hazardous components to improve further and prevent solid foreign materials from entering equipment protection grade in shell, subspace can also be formed in described first space.
In addition, louvre can be formed in the bottom in described first space, to improve the air flowing in the first space further.
Described electric equipment can for inverter or other there is the electric equipment of this degree of protection requirement.
According to a further aspect in the invention, provide a kind of electric equipment, described electric equipment comprises radiator, be arranged on housing outside radiator and electric component, described electric component comprises element and the major electrical components of needs heat radiation, and the element of described needs heat radiation and described major electrical components are separately positioned on mutually in separated first space and second space; Louvre is only formed in the top in described first space; And also comprising the printed circuit board (PCB) of the element installing the heat radiation of described needs, described printed circuit board (PCB) is arranged on described first spatially, to close this first space, and does not form wiring layer on the side of this printed circuit board (PCB) towards the first space.
Preferably, described housing also comprises dividing plate, and the space in described housing is separated into described first space and second space by described dividing plate.Described dividing plate can be integrally formed with described housing.
In addition, described first space can be arranged in radiator body, and described second space is arranged in described housing.
Preferably, the described element of heat radiation that needs is installed near described printed circuit board (PCB), makes the gap between the element of described needs heat radiation and described printed circuit board (PCB) be less than 1 millimeter.In addition, in described needs, between the element of heat radiation and described printed circuit board (PCB), seal washer can be set.
The described component outer surface insulation needing heat radiation, is preferably the combination of capacitor, relay, resistor, inductor, any one or they in power model.
Described electric equipment is also included in the subspace formed in described first space, to improve degree of protection further.In order to be beneficial to the air flowing in the first space, preferably, form louvre in the bottom in described first space.
Described electric equipment can for inverter or other have and thisly to prevent in human body proximity shell hazardous components and prevent solid foreign materials from entering the electric equipment of equipment protection class requirement in shell.
By the present invention, on the one hand, because second space does not have louvre at top, therefore, can prevent foreign matter or human body from entering in this space, cause fault or Danger Electric shock risk; On the other hand, in the first space holding the element needing heat radiation, owing to needing the element of heat radiation, there is insulation crust, and the printed circuit board (PCB) installing the element of needs heat radiation does not arrange wiring layer in the side in the face of the first space, therefore, the live part do not exposed in the first space, therefore, even if foreign matter, as metal fillings or finger enter in the first space accidentally, the danger of fault and electric shock also can not be caused.Between the element needing heat radiation and circuit board, seal washer is set, the first space can be entered into and causes the risk of fault by further anti-sealing.
Accompanying drawing explanation
By with reference to the accompanying drawings in the detailed description of the preferred embodiment for the present invention, principle of the present invention and benefit will be better understood, in figure:
Fig. 1 is the partial view of the conventional inverter illustrated with cover sheet;
Fig. 2 is the perspective schematic view that inverter is shown;
Fig. 3 A and 3B illustrates that, according to the housing in the inverter of first preferred embodiment of the invention, wherein Fig. 3 A illustrates the perspective view of the housing when not installing Capacitor banks, and Fig. 3 B illustrates the perspective view of the housing after having installed Capacitor banks;
Fig. 4 A and 4B illustrates according to the radiator in the inverter of another preferred embodiment of the present invention, and wherein, Fig. 4 A illustrates the view be not arranged on by Capacitor banks in radiator; And Fig. 4 B illustrates the view arranged in radiator by Capacitor banks;
Fig. 5 is the perspective view that Capacitor banks is shown;
Fig. 6 is the cutaway view schematically showing Capacitor banks; And
Fig. 7 is the cutaway view of another example schematically showing Capacitor banks.
Embodiment
Below, the preferred embodiment of the present invention is described in detail with reference to accompanying drawing.In all figure, the identical Reference numeral of same or analogous element represents.It is to be noted, in this application, the directionality term of appearance, as top, refers to when inverter is arranged in rack, towards upper part.
In order to understand object of the present invention better, first with reference to accompanying drawing 1, traditional inverter is described.As shown in Figure 1, traditional inverter 10 comprises radiator 1 and housing 2.The electric component (not shown) of inverter is installed in housing 2, as direct current capacitor group, relay etc., is provided with louvre 3 at the top of housing 2, for the object of protection, louvre 3 is coated with cover sheet 4.But; in order to dispel the heat to the electric component in inverter 10 better; user pulls down this cover sheet 4 usually voluntarily; but; after pulling down protective cover plate 4, louvre 3 exposes, thus foreign matter, as the chip that produces during processing rack; easily dropped in inverter case 2 by this louvre 3, cause fault.In addition, operator or other staff make finger or other position of health enter into louvre 3 accidentally, cause electric shock accidents.
In order to overcome the problems referred to above and take into account the heat dispersion of inverter, propose the present invention.Below, with reference to Fig. 3 to Fig. 7, the preferred embodiment of the present invention is described.
[the first execution mode]
With reference to Fig. 2, Fig. 3 A and 3B, according to the inverter 10 of the present invention first preferred implementation shown in it.
As shown in Figure 2, housing 2 is had in the arranged outside of radiator 1, the electric component of inverter is held in this housing 2, in these electric components, there are some electric components, as Capacitor banks, relay etc. are influenced by heat larger, therefore, need fully to dispel the heat to these elements, and in detail in the claims these elements are called the element that needs dispel the heat, and in the following description, only with direct current capacitor group as an example, and for other electric components except needing the element of heat radiation, hereinafter referred to as major electrical components.
As shown in Figure 3A, housing 2 inside always is divided into two spaces 51 and 52 by dividing plate 5, and wherein the first space 51 is for holding direct current capacitor group 6 (see Fig. 3 B), and second space 52 is for major electrical components (not shown).This dividing plate 5 and housing one casting, and also can be formed by other known methods, and also can form dividing plate and housing respectively, then dividing plate is assembled on housing.At the top of housing, correspond to the part in the first space holding Capacitor banks 6, be provided with louvre 3 ', and in case top, the part corresponding to the second space holding other electric components, louvre is not set.That is, louvre 3 ' is only arranged on (see Fig. 3 A) in the part at the top of inverter case 2.
Equally, in the bottom of housing 2, part in the first space 51, also louvre 3 can be set, as shown in Figure 3A.
As shown in Fig. 3 B, Fig. 5 and Fig. 6, capacitor 61 is arranged on printed circuit board (PCB) (PCB) 62, and forms on Capacitor banks 6, be preferably employing four layers of PCB, but the present invention is not limited to this, but according to designing requirement and purposes, can adopts various PCB.PCB 62 and the capacitor on it 61 are arranged according to the profile in the first space 51, so that when being arranged in the first space 51 by PCB 62, PCB 62 closes the first space together with housing 2 and dividing plate 5, receives capacitor 61, as shown in Figure 3 B in this space content.In addition, as shown in Figure 6, at PCB 62 towards on the side in this first space 51, namely, on the side being provided with capacitor 61, wiring layer is not set.And wiring layer 8 is arranged on the opposite side of PCB 62.And capacitor 61 has insulation crust 611.Thus, in the first space 51, the live part do not exposed.In addition, in order to improve degree of protection further, preferably, capacitor 61 is installed near PCB 62, and preferably, the gap between capacitor 61 and PCB 62 is less than 1 millimeter.
Thus, Capacitor banks 6 is assembled in housing 2, and after having assembled inverter 10, even if foreign matter, as metal fragment, drop in the first space 51 through louvre 3 ', or finger or other body parts enter in the first space 51 accidentally, owing to there is not live part as mentioned above in the first space 51, therefore, the danger of fault or electric shock can not be caused.And, because the gap between capacitor 61 and PCB 62 is very little, foreign matter or finger can not drop in this gap, this also reduce further the danger of fault or electric shock, degree of protection is brought up to IP20D from IP20, that is, improve electric equipment to prevent in human body proximity shell hazardous components and prevent solid foreign materials from entering the degree of protection of equipment in shell.
In addition, gap between capacitor 61 and circuit board 62 is greater than 1 millimeter, seal washer 63 (see Fig. 7) can be set up between capacitor 61 and circuit board 62, thus can the first space 51 of entering into of anti-sealing and touch live part, cause fault, the requirement of shelter of IP25D can be met like this.
Owing to being provided with louvre 3 and 3 ' in the bottom in the first space 51 and top, therefore, the cooling requirements of Capacitor banks 6 can being ensured, thus extend the life-span of Capacitor banks 6.
[the second execution mode]
With reference to the accompanying drawings 2, Fig. 4 A and 4B describes according to the second preferred implementation of the present invention.In this second preferred implementation, Capacitor banks 6 is arranged on inside radiator 1.
Similar, inverter comprises radiator 1 and housing 2.With the first preferred implementation unlike: major electrical components is contained in housing 2, and the top of housing 2 does not arrange louvre; And need the element of heat radiation, as Capacitor banks 6 is arranged in radiator 1.
As shown in Figure 4 A, in radiator 1, in a part for radiator body, be provided for the first space 51 holding Capacitor banks 6.At the top of radiator body, corresponding to the part within the first space 51, be provided with louvre 3 '.And, for the ease of air current flow, within the first space 51, the lower wall of radiator body, be provided with louvre (not shown), can be entered into by the louvre in lower wall in the first space 51 from the air-flow of fan 7, and discharge through the louvre 3 ' being arranged on radiator body top, thus improve the heat dispersion of Capacitor banks.
Meanwhile, as shown in Fig. 4 B, Fig. 5 and Fig. 6, Capacitor banks 6 is arranged according to the mode identical with the first execution mode, that is, the capacitor 61, PCB 62 that Capacitor banks 6 comprises PCB 62 and its upper installation is arranged according to the profile in the first space 51, to close this first space 51, as shown in Figure 4 B.
In addition, as shown in Figure 6, at PCB 62, wiring is not set on the side in the first space 51, and connects up and 8 to be arranged on relative opposite side.And capacitor 61 has insulation crust 611.Preferably, capacitor 61 is arranged on PCB 62, makes the gap between capacitor 61 and PCB 62 very little, is preferably less than 1 millimeter.In addition, equally, also seal washer 63 (see Fig. 7) can be set up between capacitor 61 and circuit board 62, thus can the first space 51 of entering into of anti-sealing and touch live part, cause fault.
According to the second execution mode, similar with the first execution mode, because the housing 2 holding major electrical components does not have louvre at top, therefore, can prevent other people body region such as foreign matter or finger from entering in the space of this housing 2, thus prevent the danger causing fault or electric shock.
Meanwhile, for the first space 51 holding Capacitor banks 6 provides louvre 3 ', improve the radiating condition of Capacitor banks 6, extend the life-span of Capacitor banks 6.In addition, by the side that wiring is not formed in towards the first space on PCB 62, in the first space 51, not there is the live part exposed, even if therefore other people body region such as foreign matter or finger enters in the first space 51 of accommodation Capacitor banks, also fault or Danger Electric shock risk can not be brought.
In superincumbent description, exemplarily explain principle of the present invention with inverter, but, it will be appreciated by those skilled in the art that, the present invention is not limited to this specific electric equipment of inverter, but can be applied to all electric equipments that there is similar requirement of shelter, as in frequency converter.In addition, can a sub spaces be set in addition, for holding balancing resistor etc., to meet requirement of shelter better in the first space holding Capacitor banks.
Therefore, the present invention is in no way limited to particular implementation described here, but makes various modifications and variations in the protection range that can limit in claims.
Claims (20)
1. one kind is improved electric equipment and to prevent in human body proximity shell hazardous components and prevent solid foreign materials from entering the method for equipment protection grade in shell, described electric equipment comprises: radiator, be arranged on housing outside radiator and electric component, described electric component comprises element and the major electrical components of needs heat radiation, it is characterized in that, described method comprises:
The described element of heat radiation and the described major electrical components of needing is arranged at mutually in separated first space and second space respectively;
Only at the first spatial placement louvre;
Louvre is arranged on the top in the first space; And
The described element of heat radiation that needs is installed on a printed circuit, this printed circuit board (PCB) is arranged on first spatially to close this first space, and does not form wiring layer on the side of this printed circuit board (PCB) towards the first space;
Described electric equipment is inverter.
2. the method for claim 1, is characterized in that, utilizes dividing plate that the space in described housing is separated into described first space and second space.
3. method as claimed in claim 2, it is characterized in that, described dividing plate and described housing are integrally formed.
4. the method for claim 1, is characterized in that, described first spatial placement is in radiator body, and described second space is arranged in described housing.
5. method according to any one of claims 1 to 4, is characterized in that, the described element of heat radiation that needs is installed near described printed circuit board (PCB), and making describedly needs the gap between the element of heat radiation and described printed circuit board (PCB) to be less than 1 millimeter.
6. method according to any one of claims 1 to 4, is characterized in that, arranges seal washer in described needs between the element of heat radiation and described printed circuit board (PCB).
7. the method according to any one of Claims 1-4, is characterized in that, the described component outer surface insulation needing heat radiation.
8. method as claimed in claim 7, wherein, the described element of heat radiation that needs is the combination of any one or they in capacitor, relay, resistor, inductor.
9. the method according to any one of Claims 1-4, is characterized in that, is also included in described first space and forms subspace.
10. the method according to any one of Claims 1-4, is characterized in that, louvre is also formed in the bottom in described first space.
11. 1 kinds of electric equipments, described electric equipment comprises radiator, be arranged on housing outside radiator and electric component, and described electric component comprises element and the major electrical components of needs heat radiation, it is characterized in that:
The described element of heat radiation and the described major electrical components of needing is separately positioned on mutually in separated first space and second space;
Louvre is only formed in described first space;
Louvre is formed in the top in the first space; And
Also comprise the printed circuit board (PCB) of the element installing the heat radiation of described needs, this printed circuit board (PCB) is arranged on described first spatially to close described first space, and does not form wiring layer on the side of this printed circuit board (PCB) towards the first space;
Described electric equipment is inverter.
12. electric equipments as claimed in claim 11, it is characterized in that, also comprise dividing plate, the space in described housing is separated into described first space and second space by described dividing plate.
13. electric equipments as claimed in claim 12, it is characterized in that, described dividing plate and described housing are integrally formed.
14. electric equipments as claimed in claim 11, it is characterized in that, described first spatial placement is in radiator body, and described second space is arranged in described housing.
15. electric equipments according to any one of claim 11 to 14, is characterized in that, the described element of heat radiation that needs is installed near described printed circuit board (PCB), and making describedly needs the gap between the element of heat radiation and described printed circuit board (PCB) to be less than 1 millimeter.
16. electric equipments according to any one of claim 11 to 14, is characterized in that, arrange seal washer in described needs between the element of heat radiation and described printed circuit board (PCB).
17. electric equipments according to any one of claim 11 to 14, is characterized in that, the described component outer surface insulation needing heat radiation.
18. electric equipments as claimed in claim 17, is characterized in that, the described element of heat radiation that needs is the combination of any one or they in capacitor, relay, resistor, inductor.
19. electric equipments according to any one of claim 11 to 14, is characterized in that, be also included in the subspace formed in described first space.
20. electric equipments according to any one of claim 11 to 14, it is characterized in that, louvre is also formed in the bottom in described first space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910148128.1A CN101931314B (en) | 2009-06-22 | 2009-06-22 | Electrical device and method for increasing protection grade of same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910148128.1A CN101931314B (en) | 2009-06-22 | 2009-06-22 | Electrical device and method for increasing protection grade of same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101931314A CN101931314A (en) | 2010-12-29 |
| CN101931314B true CN101931314B (en) | 2014-12-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910148128.1A Active CN101931314B (en) | 2009-06-22 | 2009-06-22 | Electrical device and method for increasing protection grade of same |
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| Country | Link |
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| CN (1) | CN101931314B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103051156A (en) * | 2012-06-14 | 2013-04-17 | 深圳市正弦电气股份有限公司 | Frequency converter |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1030340A (en) * | 1987-07-02 | 1989-01-11 | 海德堡印刷机械股份有限公司 | Switch cubicle |
| US5617307A (en) * | 1994-09-02 | 1997-04-01 | Schneider Electric Sa | Electronic variable speed drive |
| CN1177194A (en) * | 1996-09-16 | 1998-03-25 | 尹顿公司 | Electrical device such as network protector relay with printed circuit board seal |
-
2009
- 2009-06-22 CN CN200910148128.1A patent/CN101931314B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1030340A (en) * | 1987-07-02 | 1989-01-11 | 海德堡印刷机械股份有限公司 | Switch cubicle |
| US5617307A (en) * | 1994-09-02 | 1997-04-01 | Schneider Electric Sa | Electronic variable speed drive |
| CN1177194A (en) * | 1996-09-16 | 1998-03-25 | 尹顿公司 | Electrical device such as network protector relay with printed circuit board seal |
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| Publication number | Publication date |
|---|---|
| CN101931314A (en) | 2010-12-29 |
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