WO2013045092A1 - Surgical microscope with heat-generating component and with cooling device - Google Patents

Surgical microscope with heat-generating component and with cooling device Download PDF

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Publication number
WO2013045092A1
WO2013045092A1 PCT/EP2012/004053 EP2012004053W WO2013045092A1 WO 2013045092 A1 WO2013045092 A1 WO 2013045092A1 EP 2012004053 W EP2012004053 W EP 2012004053W WO 2013045092 A1 WO2013045092 A1 WO 2013045092A1
Authority
WO
Grant status
Application
Patent type
Prior art keywords
flow channel
heat
surgical microscope
characterized
suspension
Prior art date
Application number
PCT/EP2012/004053
Other languages
German (de)
French (fr)
Inventor
Markus Bausewein
Peter Reimer
Original Assignee
Carl Zeiss Meditec Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

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Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B21/00Microscopes
    • G02B21/0004Microscopes specially adapted for specific applications
    • G02B21/0012Surgical microscopes
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B7/00Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/001Counterbalanced structures, e.g. surgical microscopes

Abstract

The invention relates to a surgical microscope (1) comprising a main body (14), which has a heat-generating component (2) and a cooling device for the heat-generating component (2) which comprises a first flow channel (16) for a cooling medium. According to the invention the surgical microscope (1) has a suspension (3) for the main body (14), wherein the first flow channel (16) is at least partly arranged in the suspension (3).

Description

Description:

Surgical microscope generating heat component and with cooler

The invention relates to a surgical microscope with a main body having a heat-producing component and a cooling device for the heat-generating

Component comprising a first flow channel for a cooling medium.

Surgical microscopes often include components, in which produced or stored and dispensed during operation of heat. These include such assemblies or attachments which energy is supplied in any form outside of the operating microscope, because some of the energy due to unavoidable losses in the device is always converted into thermal energy and heat. Heat can in surgical microscopes for example, a power loss of electrical

Consumers occur in the surgical microscope or by mechanical friction between moving parts. During operation, the heat-generating components must often be cooled, for example to the working temperature desired within a

to maintain tolerance and / or to provide comfortable working conditions in the environment of the operating microscope for the operating personnel or to meet legislative requirements.

From US 5122904 a surgical microscope with a heat generating component in the form of a lighting unit is known. The lighting unit is in a

so-called illumination arm of a suspension arranged. The light from the illumination unit is guided via optical fiber along the suspension to the microscope. The illumination unit comprises a blower by which an air flow in the illumination arm of the

Lighting unit whereby the lighting unit is cooled is generated over.

A disadvantage of the method known from US 5122904 surgical microscope, the light loss caused by the light guide.

From US 4309817 a further surgical microscope is known, which has a heat-generating component in the form of a lighting unit. The lighting unit includes a

CONFIRMATION COPY lamp which is arranged in a housing. The housing is designed as a flow channel and has holes below the lamp, can flow into the housing through the air. At the upper end of the housing a hose line is connected with a fan. For cooling the lamp air is sucked in with the aid of the fan through the holes below the lamp, and directed past the lamp through the tubing from the microscope away during operation. A disadvantage of the method known from US 4039817 surgical microscope, that the device for removing heat from the work area is made very bulky and that additional hose lines are provided for heat transport, the

reduce labor Dream in the environment of the operating microscope and which must be kept sterile, under certain circumstances during operation of the surgical microscope.

An object of the present invention is to provide a surgical microscope

provide, which is characterized by a compact design that can be also easily kept sterile.

The object is achieved by a surgical microscope with the features of claim 1.

According to the invention, the operation microscope to a suspension for the base body, wherein the first flow channel is at least partly arranged in the suspension. Under a suspension, any device is to be understood, through which the

Surgical microscope is kept in operation. A suspension can in particular be designed as an arm of a stand, of the immediately to the base body

Surgical microscope is connected. The suspension is detachably or non-detachably with the

connected base body or alternatively formed integrally with the base body. , The flow channel allows at least a majority of the heat generated on the

to transfer the cooling medium in the flow channel, and by convection through the

Suspension from the heat generating component and transported away from the basic body. The arrangement of the first flow passage in the suspension leads to a compact construction with few or no additional elements to an outer side of the operation microscope so that operation microscope according to the invention can easily be kept sterile. In one embodiment of the invention, means for generating a flow of cooling medium in the first flow passage are provided. Characterized a heat transfer in the flow passage is improved so that a greater cooling power is achieved.

In a further embodiment of the invention, the means for generating a

Flow at least one solid state fan. The operation of a solid state fans based on a corona discharge between two electrodes. By a strong electric field air molecules are ionized and set in motion. One advantage of a solid state fans is that it is operated without moving parts, so that, at most little or no vibration in the operation microscope to be initiated.

In an alternative or supplementary embodiment of the invention, the means for producing a flow comprise at least a fan. For a very cheap way is given to improve convection in the flow channel.

In a further embodiment of the invention, the surgical microscope comprises a second flow passage which is at least partially disposed in the interior of the suspension and which is connected fluidically with the first flow channel. Through the second flow passage, the cooling medium is supplied to the surgical microscope. The design of the

Operation microscope with two flow channels has the advantage that the cooling medium in a certain distance from a working chamber of the operating personnel in the

is fed surgical microscope or decoupled. Under the working space is to be understood as a space between a surgical site and the surgical microscope, which the doctor needs to perform its treatment. The second flow channel can be arranged in the suspension in particular likewise, so that a supply of the cooling medium in the suspension.

In a further embodiment of the invention the first flow channel is at least partially disposed within the second flow channel. This achieves a particularly compact design. In a further embodiment of the invention, the surgical microscope comprises a

Heat bridge extending from said heat generating component to the first

The flow channel extends and through which a large portion of the generated heat can be transported to the cooling medium inside the first flow channel. This makes it possible to

to arrange the flow channel in a distance from the heat-generating component, which is bridged with the heat bridge.

In one embodiment of the invention, the heat bridge is designed as a thermal conductor, and comprises a material having a thermal conductivity greater than 200 W / mK. The heat generated is thus transported by means of conduction from the heat generating component by the heat conductor to the flow channel. the heat is transferred to the cooling medium and from there in the first place through convection in a wall of the flow channel

A lazy river by the suspension of the surgical microscope transported away.

In a further embodiment of the invention, the heat-generating component is configured as a lighting device, the lighting device may in particular comprise a light emitting diode (LED). Lighting devices generally have a large heat capacity, so that an application of the invention to a surgical microscope having an illumination device is particularly advantageous.

In the following the invention is explained in detail with reference to the drawing.

The single FIGURE 1 shows a first embodiment of an inventive

Surgical microscope.

In Figure 1 an inventive surgical microscope 1 is shown generating heat with a component in the form of a lighting unit 2 and a suspension. 3

The surgical microscope 1 is configured as a stereoscope and has two

Observation beam paths, wherein in Figure 1 only one observation beam path 4 is shown. In the observation beam path are a main objective 6, a

Magnification changer 7 are arranged for setting a magnification factor of the operation microscope and a tube 8 for deflecting the observation beam path in the direction of an observer. By the optical elements in the observation beam path 4, an intermediate image is generated through the tube 8, which can be viewed by an observer through an eyepiece. 9

The surgical microscope 1 also comprises a lighting unit 2 with a light source in the form of a light-emitting diode 10 (hereinafter referred to as LED) for illuminating the

Object plane 5 with light. From the LED 10 emitted light is in a

Illumination beam 13 condensed by a condenser lens 1 1 and out via a mirror 12 through the main objective 6 to the object plane. 5 In other, not shown

embodiments is as luminous means a halogen lamp, a xenon lamp or an OLED available. In yet another, not shown embodiment, instead of the mirror, a beam splitter is arranged in the observation beam path, so that the illumination beam path superposed on the observation beam path. In a further embodiment of the illumination beam path to the main lens 6 by being guided to the object plane. 5 Without loss of generality, the embodiments described in this paragraph can also be combined.

A housing 14 of the surgical microscope 1 is not shown in detail, via a

Articulation movably coupled to a suspension. 3 The suspension 3 is performed in this embodiment, as viewed from the housing of the first support arm 15 of a stand of the surgical microscope, not shown, wherein the stand may include any number of other supporting arms. Under a supporting arm a member of a closed or open kinematic chain is understood to mean in this context, generally, through which the housing of the surgical microscope is connected to a fixed point in space (for example, a point of application on floor, wall or ceiling of the operating room). In a further embodiment not shown, the housing is connected via a fixed connection with a first support arm of a stand, wherein the connection may be detachable or non-detachable configured. In particular, the housing and the first bracket can be made in one piece. In the interior of the support arm 15, a second flow channel 17 and a first flow channel 16 are formed. Through the second flow channel 17, a lower end 18 of the support arm 15 to which the connection is to the housing 14, a cooling medium in the form of air can be supplied. In this embodiment, the air above the openings at an upper end 19 of the support arm 15 in the support arm can be introduced. In another, not shown

Exemplary embodiment is supplied to the air the second flow channel via further flow ducts in adjacent support arms of the stand. At the lower end 18 of the support arm 15, the air is deflected and guided through the first flow channel back to the upper end 19 of the support arm 15 °.

In the first flow channel 16 means for generating a flow in the form of three solid state fans 20 (hereinafter referred to as SSF) is arranged. The operating principle of this SSF 20 is based on a corona discharge between two electrodes. Here are

Air molecules ionized and rotated by a strong electric field in motion, whereby a flow of air in the order of up to several meters per second is created. An advantage of SSF is that it is operated without moving parts, so that no significant vibration or shock is generated in the system, even if should not have been formed after a long time deposits or impurities. In further, non-illustrated embodiments, one, two, three or more means for generating a flow in the first flow channel and / or in the second

Flow channel arranged.

The first flow channel 16 and the LED 10 are connected to each other via a thermal bridge, or a heat pipe in the form of a heat conduction 21st Due to the heat pipe 21 is a major part of the heat generated by the LED to the lower end 18 of the support arm 15

transportable. The heat pipe 21 stands with the LED 10 or a heat sink of the LED 10 in heat-conducting contact. Under a majority of the heat, an amount of at least 50% of a discharged heat from the LED power is understood.

In this embodiment, a heat transfer from the LED 10 through the housing 14 and the suspension means 3 is carried out in two steps. In a first step a large part of the heat generated by the LED 10 by heat conduction from the LED 10 through the heat conductor 21 to the lower end 18 of the support arm 15 is transmitted. At the lower end 18 of the support arm 15 of the heat conductor 21 is adjacent to the air flow which is generated by the SSF 20 in the first flow channel sixteenth In a boundary layer of the air flow directly on the heat conductor 21, the heat is transferred by conduction from the heat conductor 21 to the air, which thus absorbs thermal energy. The flow of air (convection) causes a transfer of thermal energy through the second flow channel from the lower end 18 of the support arm 15 away.

The surgical microscope according to the invention has been described in the embodiments be generated based on a thermal component in the form of a lighting unit. Without loss of generality but the concept is also applicable to other, in particular electrically operated components such as video cameras or systems for data projection.

In further exemplary embodiments, not shown means for generating a

Air flow disposed in the first flow channel and / or in the second flow channel within the housing of the surgical microscope. In yet another

Embodiment of the first support arm itself is configured as a first flow channel, so that it is possible to dispense with a separate component in the interior of the first bracket.

Due to the heat transport through the suspension, the heated air can be transported to an area in which the heated exhaust air is not or only a slight effect of interfering with the operation of the surgical microscope. Thereby, the invention allows a comfortable operation of the surgical microscope. Furthermore, the arrangement

additional lines are largely dispensed on an outer side of the operating microscope, resulting in advantages in terms of a sterility of the device yield.

Claims

claims:
The surgical microscope (1) with a base body (14) generating a thermal component (2), and a suspension (3) for the base body (14) having a first support arm (15), wherein the base body (14) is connected to a joint connection with the first support arm (15) of the suspension (3), and a cooling apparatus for the heat-generating component (2) comprising a cooling medium, and a first flow channel (16) for the cooling medium, characterized in that the first flow channel (16) within the suspension (3) is arranged, and the operation microscope (1) comprising a thermal bridge (21) extending from said heat generating component (2) to the first flow channel (16) and through which a large portion the generated heat can be transported to the cooling medium inside the first flow channel (16).
Surgical microscope according to claim 1,
characterized, in that
Means (20) for generating a flow of cooling medium in the first
Flow channel (16) are present.
Surgical microscope according to claim 2,
characterized, in that
the means (20) for generating a flow of cooling medium comprise at least one solid state fan.
4. Operation microscope according to one of claims 2 or 3,
characterized, in that
the means (20) for generating a flow of the cooling medium include at least one fan.
5. Operation microscope according to one of claims 1 to 4,
characterized, in that
the surgical microscope comprises a second flow channel (17) which is arranged at least partially in the interior of the suspension (3) and with the first flow channel (16) is fluidically connected.
6. An operation microscope according to claim 5,
characterized, in that
the first flow channel (16) at least partially within the second
Flow channel (17) is arranged.
7. The surgical microscope of claim 1 to 6,
characterized, in that
the thermal bridge (21) is designed as a thermal conductor, and comprises a material having a thermal conductivity greater than 200 W / mK.
8. Surgical microscope according to one of claims 1 to 7,
characterized, in that
the heat-generating component (2) is configured as a lighting device.
9. The surgical microscope of claim 8,
characterized, in that
the lighting device comprises an LED (10).
PCT/EP2012/004053 2011-09-29 2012-09-27 Surgical microscope with heat-generating component and with cooling device WO2013045092A1 (en)

Priority Applications (2)

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DE102011114525.0 2011-09-29
DE201110114525 DE102011114525B4 (en) 2011-09-29 2011-09-29 Surgical microscope generating heat component and with cooler

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016086945A1 (en) * 2014-12-04 2016-06-09 Chemometec A/S Image cytometer implementation

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4039817A (en) 1975-11-20 1977-08-02 Williams Robert W Microscope lamp assembly
US4309817A (en) 1980-04-29 1982-01-12 Gte Products Corporation Method for assembling an electrochemical cell
US5122904A (en) 1989-10-23 1992-06-16 Olympus Optical Co., Ltd. Operating microscope with drape and suction means for removing air from the drape
WO1997013997A1 (en) * 1995-10-12 1997-04-17 Leica Ag Stand
US20050161176A1 (en) * 2004-01-27 2005-07-28 Carl Zeiss Ag Device holding apparatus
US20110080638A1 (en) * 2009-10-06 2011-04-07 Dieter Feger Microscope

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5122984A (en) 1987-01-07 1992-06-16 Bernard Strehler Parallel associative memory system
DE20221380U1 (en) * 2001-09-20 2005-10-13 Carl Zeiss Surgical Gmbh Medical instrument e.g. operation microscope has suction unit for removing air from drape that is fixed to arm of microscope stand by fastener attached to collar
US8585251B2 (en) * 2008-12-12 2013-11-19 Bridgelux, Inc. Light emitting diode lamp
DE102010052219A1 (en) * 2010-11-24 2012-05-24 Karl Storz Gmbh & Co. Kg Holding system for medical instruments

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4039817A (en) 1975-11-20 1977-08-02 Williams Robert W Microscope lamp assembly
US4309817A (en) 1980-04-29 1982-01-12 Gte Products Corporation Method for assembling an electrochemical cell
US5122904A (en) 1989-10-23 1992-06-16 Olympus Optical Co., Ltd. Operating microscope with drape and suction means for removing air from the drape
WO1997013997A1 (en) * 1995-10-12 1997-04-17 Leica Ag Stand
US20050161176A1 (en) * 2004-01-27 2005-07-28 Carl Zeiss Ag Device holding apparatus
US20110080638A1 (en) * 2009-10-06 2011-04-07 Dieter Feger Microscope

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016086945A1 (en) * 2014-12-04 2016-06-09 Chemometec A/S Image cytometer implementation

Also Published As

Publication number Publication date Type
DE102011114525B4 (en) 2015-10-15 grant
DE102011114525A1 (en) 2013-04-04 application

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