CN101931314A - 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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- CN101931314A CN101931314A CN2009101481281A CN200910148128A CN101931314A CN 101931314 A CN101931314 A CN 101931314A CN 2009101481281 A CN2009101481281 A CN 2009101481281A CN 200910148128 A CN200910148128 A CN 200910148128A CN 101931314 A CN101931314 A CN 101931314A
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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 inverter especially, and relate to and improve this electric equipment and prevent that human body is near dangerous parts in the shell with prevent that solid foreign materials from entering the method for equipment protection grade in the shell.
Background technology
Inverter is installed in the rack usually, and owing to usually other electric equipments need be installed on inverter, to carry out processed to rack, as boring, like this, just might there be such risk, that is, foreign matter, for example metal fragment of boring generation, drop in the inverter by the louvre on the inverter case top, cause fault.In addition, when in rack, constructing, also exist foreign matters such as small instruments and tools or screw are dropped to risk in the inverter case.
Owing to have louvre at the inverter case top, also can there be such risk, that is: operator or other staff do not notice making that finger or other positions of human body enter into louvre, and cause the accident of electric shock.
Therefore, for fear of above-mentioned danger takes place, specified corresponding standard, as the IEC60529 standard about degree of protection.
In order to overcome above mentioned problem, a solution is provided, that is, on the existing inverter housing, a detachable protective cover plate is installed on the louvre at inverter case top, thereby is prevented that foreign matter or finger etc. from entering into louvre accidentally.By this method, can prevent that is: lead from touching dangerous parts so that the top of inverter reaches the IP41 degree of protection in IEC 60529 standards.But the problem that this method is brought is the electric component in the inverter, electric component as the heat radiation of needs such as transformer, capacitor group can not get efficiently radiates heat, and these electric components that need dispel the heat are subjected to Temperature Influence very big, if can not efficiently radiates heat, then can influence the useful life of appliance component.
Therefore; in use; the user can pull down cover sheet usually voluntarily; improve the heat dispersion of inverter; but this makes the inverter top can't satisfy IP41 standard above-mentioned again; and can only satisfy the IP20 level of protection, and the equipment that makes can not prevent that human body is near dangerous parts in the shell and prevent that solid foreign materials from entering equipment in the shell.
Summary of the invention
Therefore, the object of the present invention is to provide a kind of electric equipment that improves to prevent that human body is near dangerous parts in the shell and prevent that solid foreign materials from entering the method for equipment protection grade in the shell, utilize this method, can satisfy the radiating condition of inverter simultaneously, guarantee the working life of radiating element.In addition, the present invention also provides a kind of and utilizes this method to improve to prevent human body near dangerous parts in the shell with prevent that solid foreign materials from entering the electric equipment of equipment protection grade in the shell.
According to an aspect of the present invention, provide a kind of electric equipment that improves to prevent that human body is near dangerous parts in the shell and prevent that solid foreign materials from entering the method for equipment protection grade in the shell, described electric equipment comprises: radiator, be installed in the housing and the electric component in the radiator outside, described electric component comprises the element and the main electric component of needs heat radiation, and described method comprises: the element and the described main electric component of described needs heat radiation are arranged at respectively in mutual separated first space and second space; Only louvre is set at the top in first space; And the described element of heat radiation that needs is installed on the printed circuit board (PCB), and this printed circuit board (PCB) is installed on described first space, and does not form wiring layer at this printed circuit board (PCB) on a side in first space.
Preferably, utilize dividing plate that the separated by spaces in the described housing is become described first space and second space, described dividing plate and described housing are integrally formed.
Alternatively, described first space can be arranged in the radiator body, and described second space is arranged in the described housing.
Preferably, the described element that need dispel the heat is installed near described printed circuit board (PCB), makes described element that need dispel the heat and the gap between the described printed circuit board (PCB) less than 1 millimeter.Scheme is provided with seal washer between described element that need dispel the heat and described printed circuit board (PCB) as an alternative.
The described element outer surface insulation that needs heat radiation, and be any or their combination in capacitor, relay, resistor, inductor, the power model.
Prevent that in order further to improve human body near dangerous parts in the shell with prevent that solid foreign materials from entering equipment protection grade in the shell, can also form the subspace in described first space.
In addition, can form louvre in the bottom in described first space, with the air flows in further improvement first space.
Described electric equipment can have the electric equipment of this degree of protection requirement for inverter or other.
According to a further aspect in the invention, a kind of electric equipment is provided, described electric equipment comprises radiator, is installed in the housing and the electric component in the radiator outside, described electric component comprises element and the main electric component that needs dispel the heat, and the described element of heat radiation and the described main electric component of needing is separately positioned in mutual separated first space and second space; Louvre only is formed on the top in described first space; And also comprising the printed circuit board (PCB) that the element that described needs dispel the heat is installed, described printed circuit board (PCB) is installed on described first space, sealing this first space, and does not form wiring layer at this printed circuit board (PCB) on a side in first space.
Preferably, described housing also comprises dividing plate, and described dividing plate becomes described first space and second space with the separated by spaces in the described housing.Described dividing plate can be integrally formed with described housing.
In addition, described first space can be arranged in the radiator body, and described second space is arranged in the described housing.
Preferably, the described element that need dispel the heat is installed near described printed circuit board (PCB), makes described element that need dispel the heat and the gap between the described printed circuit board (PCB) less than 1 millimeter.In addition, can between described element that need dispel the heat and described printed circuit board (PCB), seal washer be set.
The described element outer surface insulation that needs heat radiation is preferably any or their combination in capacitor, relay, resistor, inductor, the power model.
Described electric equipment also is included in the subspace that forms in described first space, with further raising degree of protection.In order to be beneficial to the air flows in first space, preferred, form louvre in the bottom in described first space.
Described electric equipment can have this human body that prevents near dangerous parts in the shell with prevent that solid foreign materials from entering the electric equipment of equipment protection class requirement in the shell for inverter or other.
By the present invention, on the one hand,, therefore, can prevent that foreign matter or human body from entering in this space, causes fault or Danger Electric shock risk because second space does not have louvre at the top; On the other hand, in first space of the element that holds the needs heat radiation, owing to need the element of heat radiation to have insulation crust, and the printed circuit board (PCB) that the element that needs heat radiation is installed is not provided with wiring layer in the side in the face of first space, therefore, and the live part that in first space, does not expose, therefore, even foreign matter enters in first space accidentally as metal fillings or finger, also can not cause the danger of fault and electric shock.Between the element of needs heat radiations and circuit board, be provided with under the situation of seal washer, can prevent further that sealing enters into first space and causes the risk of fault.
Description of drawings
By in the detailed description to the preferred embodiment for the present invention with reference to the accompanying drawings, principle of the present invention and benefit will be better understood, among the figure:
Fig. 1 is the partial view that the conventional inverter that has cover sheet is shown;
Fig. 2 is the perspective schematic view that inverter is shown;
Fig. 3 A and 3B illustrate according to the housing in the inverter of first preferred embodiment of the invention, and wherein Fig. 3 A is illustrated in the perspective view of the housing when the capacitor group is not installed, and Fig. 3 B illustrates the perspective view that capacitor group housing afterwards has been installed;
Fig. 4 A and 4B illustrate the radiator in the inverter of another preferred embodiment according to the present invention, and wherein, Fig. 4 A illustrates the view that the capacitor group is not installed in the radiator; And Fig. 4 B illustrates the capacitor group is arranged on view in the radiator;
Fig. 5 is the perspective view that the capacitor group is shown;
Fig. 6 is the cutaway view that schematically shows the capacitor group; And
Fig. 7 is the cutaway view that schematically shows another example of capacitor group.
Embodiment
Below, describe preferred implementation of the present invention in detail with reference to accompanying drawing.In all figure, same or analogous element is represented with identical Reference numeral.It is to be noted that in this application, the directionality term of appearance as the top, is meant when inverter is installed in the rack, towards last part.
In order to understand purpose of the present invention better, at first traditional inverter is described with reference to accompanying drawing 1.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, the purpose for protection is coated with cover sheet 4 on louvre 3.But; in order better the electric component in the inverter 10 to be dispelled the heat; the user pulls down this cover sheet 4 usually voluntarily; but; after pulling down protective cover plate 4, louvre 3 exposes, thus foreign matter, the chip that produces during rack as processing; drop in the inverter case 2 by this louvre 3 easily, cause fault.In addition, operator or other staff make that accidentally finger or other position of health enter into louvre 3, cause electric shock accidents.
In order to overcome the problems referred to above and to take into account the heat dispersion of inverter, the present invention has been proposed.Below, with reference to Fig. 3 to Fig. 8 preferred implementation of the present invention is described.
[first execution mode]
With reference to Fig. 2, Fig. 3 A and 3B, shown in it according to the present invention the inverter 10 of first preferred implementation.
As shown in Figure 2, arranged outside at radiator 1 has housing 2, the electric component that in this housing 2, holds inverter, in these electric components, some electric components are arranged, be influenced by heat bigger as capacitor group, relay etc., therefore, need fully dispel the heat to these elements, and the element that in claims, these elements is called the needs heat radiation, and in the following description, only as an example with the direct current capacitor group, and, below be referred to as main electric component for other electric components except that the element that needs heat radiation.
As shown in Figure 3A, housing 2 inside always are divided into two spaces 51 and 52 by dividing plate 5, and wherein first space 51 is used to hold direct current capacitor group 6 (referring to Fig. 3 B), and second space 52 is used for main electric component (not shown).This dividing plate 5 and housing one casting, and also can form by other known method, and also can form dividing plate and housing respectively, then dividing plate is assembled on the housing.At the top of housing, corresponding to the part in first space that holds capacitor group 6, be provided with louvre 3 ', and, louvre be not set in case top, corresponding to the part in second space that holds other electric components.That is to say that louvre 3 ' only is arranged in the part at top of inverter case 2 (referring to Fig. 3 A).
Equally, in the bottom of housing 2, part in first space 51, also louvre 3 can be set, as shown in Figure 3A.
As Fig. 3 B, Fig. 5 and shown in Figure 6, capacitor 61 is installed in printed circuit board (PCB) (PCB) 62, and constitutes on the capacitor group 6, be preferably and adopt four layers of PCB, but the present invention is not limited to this, but can adopt various PCB according to designing requirement and purposes.PCB 62 with and on capacitor 61 according to the profile setting in first space 51 so that when PCB 62 being installed in first space 51, PCB 62 seals first space with housing 2 and dividing plate 5, receive capacitor 61 in this space content, shown in Fig. 3 B.In addition, as shown in Figure 6, PCB 62 on a side in this first space 51, just,, wiring layer is not set being equipped with on the side of capacitor 61.And wiring layer 8 is arranged on the opposite side of PCB 62.And capacitor 61 has insulation crust 611.Thus, in first space 51, the live part that does not expose.In addition, in order further to improve degree of protection, preferably, capacitor 61 is installed near PCB 62, and preferred, the gap between capacitor 61 and the PCB 62 is less than 1 millimeter.
Thus, capacitor group 6 is being assembled in the housing 2, and assembling is finished after the inverter 10, even foreign matter is as metal fragment, in louvre 3 ' drops to first space 51, perhaps finger or other body parts enter in first space 51 accidentally, owing in first space 51, do not have live part as mentioned above, therefore, can not cause the danger of fault or electric shock.And, because the gap between capacitor 61 and the PCB 62 is very little, foreign matter or finger can not drop in this gap, this has also further reduced the danger of fault or electric shock, degree of protection is brought up to IP20D from IP20, that is to say, improved electric equipment and prevented that human body is near dangerous parts in the shell and prevent that solid foreign materials from entering the degree of protection of equipment in the shell.
In addition, the gap between capacitor 61 and the circuit board 62 greater than 1 millimeter situation under, can between capacitor 61 and circuit board 62, set up seal washer 63 (referring to Fig. 7), thereby can prevent first space 51 that sealing enters into and touch live part, cause fault, can satisfy the requirement of shelter of IP25D like this.
Owing to be provided with louvre 3 and 3 ' at the bottom and the top in first space 51, therefore, can guarantee the heat radiation requirement of capacitor group 6, thereby prolong the life-span of capacitor group 6.
[second execution mode]
With reference to the accompanying drawings 2, Fig. 4 A and 4B describe according to second preferred implementation of the present invention.In this second preferred implementation, capacitor group 6 is arranged on radiator 1 inboard.
Similarly, inverter comprises radiator 1 and housing 2.Different with first preferred implementation is: main electric component is contained in the housing 2, on the top of housing 2 louvre is not set; And the element that need dispel the heat is arranged in the radiator 1 as capacitor group 6.
Shown in Fig. 4 A, in radiator 1, in the part of radiator body, be provided for holding first space 51 of capacitor group 6.At the top of radiator body, corresponding to the part within first space 51, be provided with louvre 3 '.And, for the ease of air current flow, within first space 51, the lower wall of radiator body, be provided with the louvre (not shown), so that the air-flow from fan 7 can enter in first space 51 by the louvre on the lower wall, and pass through the louvre 3 ' discharge that is arranged on the radiator body top, thereby improved the heat dispersion of capacitor group.
Simultaneously, as Fig. 4 B, Fig. 5 and shown in Figure 6, capacitor group 6 is provided with according to the mode identical with first execution mode, that is, capacitor group 6 comprises PCB 62 and the capacitor of installing on it 61, and PCB 62 is according to the profile setting in first space 51, so that seal this first space 51, shown in Fig. 4 B.
In addition, as shown in Figure 6, PCB 62 on a side in first space 51, wiring is not set, 8 be arranged on the relative opposite side and connect up.And capacitor 61 has insulation crust 611.Preferably, capacitor 61 is installed on the PCB 62, makes that the gap between capacitor 61 and the PCB 62 is very little, preferably less than 1 millimeter.In addition, same, also can between capacitor 61 and circuit board 62, set up seal washer 63 (referring to Fig. 7), thereby can prevent first space 51 that sealing enters into and touch live part, cause fault.
According to second execution mode, similar with first execution mode, there is not louvre owing to hold the housing 2 of main electric component at the top, therefore, can prevent that foreign matter or finger from waiting other people body region to enter in the space of this housing 2, thereby prevent to cause the danger of fault or electric shock.
Simultaneously,, improved the radiating condition of capacitor group 6, prolonged the life-span of capacitor group 6 for first space 51 that holds capacitor group 6 provides louvre 3 '.In addition, be not formed on the PCB 62 a side towards first space by connecting up, in first space 51, do not have the live part that exposes, therefore even foreign matter or finger wait other people body region to enter to hold in first space 51 of capacitor group, also can not bring fault or Danger Electric shock risk.
In the superincumbent description, explained principle of the present invention with inverter as example, still, 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 the electric equipment that there is similar requirement of shelter in all, in frequency converter.In addition, in holding first space of capacitor group, a sub spaces can be set in addition, be used to hold balancing resistor etc., to satisfy requirement of shelter better.
Therefore, the present invention is in no way limited to specific implementations described here, but can make various modifications and variations in the protection range that claims limit.
Claims (22)
1. one kind is improved electric equipment and prevents that human body is near dangerous parts in the shell and prevent that solid foreign materials from entering the method for equipment protection grade in the shell, described electric equipment comprises: radiator, be installed in the housing and the electric component in the radiator outside, described electric component comprises the element and the main electric component of needs heat radiation, it is characterized in that described method comprises:
The described element of heat radiation and the described main electric component of needing is arranged at respectively in mutual separated first space and second space;
Only louvre is set at the top in first space; And
The described element of heat radiation that needs is installed on the printed circuit board (PCB), this printed circuit board (PCB) is installed on first space sealing this first space, and on a side in first space, does not form wiring layer at this printed circuit board (PCB).
2. the method for claim 1 is characterized in that, utilizes dividing plate that the separated by spaces in the described housing is become described first space and second space.
3. method as claimed in claim 2 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 space is arranged in the radiator body, and described second space is arranged in the described housing.
5. method according to any one of claims 1 to 4 is characterized in that, the described element that need dispel the heat is installed near described printed circuit board (PCB), makes described element that need dispel the heat and the gap between the described printed circuit board (PCB) less than 1 millimeter.
6. method according to any one of claims 1 to 4 is characterized in that, between described element that need dispel the heat and described printed circuit board (PCB) seal washer is set.
7. as each described method in the claim 1 to 4, it is characterized in that the described element outer surface insulation that needs heat radiation.
8. method as claimed in claim 7, wherein, the described element that needs heat radiation is any or their combination in capacitor, relay, resistor, inductor, the power model.
9. as each described method in the claim 1 to 4, it is characterized in that, also be included in described first space and form the subspace.
10. as each described method in the claim 1 to 4, it is characterized in that, form louvre in the bottom in described first space.
11., it is characterized in that described electric equipment is an inverter as each described method in the claim 1 to 4.
12. an electric equipment, described electric equipment comprise radiator, are installed in the housing and the electric component in the radiator outside, described electric component comprises the element and the main electric component of needs heat radiation, it is characterized in that:
The described element of heat radiation and the described main electric component of needing is separately positioned in mutual separated first space and second space;
Louvre only is formed on the top in described first space; And
Also comprise the printed circuit board (PCB) that the element that described needs dispel the heat is installed, this printed circuit board (PCB) is installed on described first space sealing described first space, and does not form wiring layer at this printed circuit board (PCB) on a side in first space.
13. electric equipment as claimed in claim 12 is characterized in that, also comprises dividing plate, described dividing plate becomes described first space and second space with the separated by spaces in the described housing.
14. electric equipment as claimed in claim 13 is characterized in that, described dividing plate and described housing are integrally formed.
15. electric equipment as claimed in claim 12 is characterized in that, described first space is arranged in the radiator body, and described second space is arranged in the described housing.
16., it is characterized in that the described element that need dispel the heat is installed near described printed circuit board (PCB) as each described electric equipment in the claim 12 to 15, make described element that need dispel the heat and the gap between the described printed circuit board (PCB) less than 1 millimeter.
17. as each described electric equipment in the claim 12 to 15, it is characterized in that, between described element that need dispel the heat and described printed circuit board (PCB), seal washer be set.
18., it is characterized in that the described element outer surface insulation that needs heat radiation as each described electric equipment in the claim 12 to 15.
19. electric equipment as claimed in claim 18 is characterized in that, the described element that needs heat radiation is any or their combination in capacitor, relay, resistor, inductor, the power model.
20. as each described electric equipment in the claim 12 to 15, it is characterized in that, also be included in the subspace that forms in described first space.
21. as each described electric equipment in the claim 12 to 15, it is characterized in that, also be included in the louvre of the bottom formation in described first space.
22., it is characterized in that described electric equipment is an inverter as each described electric equipment in the claim 12 to 15.
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 true CN101931314A (en) | 2010-12-29 |
| CN101931314B CN101931314B (en) | 2014-12-17 |
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| 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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Cited By (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 |
Cited By (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 |
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| Publication number | Publication date |
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| CN101931314B (en) | 2014-12-17 |
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