JPH11248324A - Cooling sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a body to be cooled from a thermal effect by adhering a cooling liquid pipe made of a resilient material onto a resilient sheet in a meander form or in a hairpin form, constituting a cooling liquid to flow through the cooling liquid pipe, and putting the resilient sheet into wrapped around the body to be cooled. SOLUTION: A cooling sheet 10 constitutes a flexible cooling jacket which is constructed such that one cooling liquid pipe 16 made of resilient material is adhered between resilient sheets 12, 14 in a meander form or in a hairpin form, a cooling liquid inlet member 18 is mounted to one end of the cooling liquid pipe 16, and a cooling liquid outlet member 20 is mounted to the other end of the cooling liquid pipe 16. The cooling sheet 10 is used in such a manner that it is wrapped around the outer periphery of a body 100 to be cooled, and a temperature controlled cooling liquid is supplied to the cooling liquid inlet member 18 by way of a cooling liquid supply hose connected to the cooling liquid inlet member 18. Due to such a construction, cooling and insulation of the body 100 to be cooled can be carried out effectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling sheet, and more particularly to a cooling sheet for cooling electric equipment such as servomotors and mechanical devices.

[0002]

2. Description of the Related Art The stability of a machine is increased by not being affected by heat to avoid a decrease in processing accuracy due to heat.
The demand for stabilizing the processing accuracy is increasing as the required processing accuracy is increased.In high-precision machine tools, etc., the machine is heated by the heat of a servomotor that has a coil section and an encoder section and generates heat. It is becoming necessary to be immune from environmental influences.

On the other hand, a conventional servomotor is air-cooled by a cooling fan or the like.

[0004] In addition, some electric appliances and mechanical devices have a coolant jacket structure incorporated in an equipment housing, and are cooled by flowing cooling water or cooling oil through a coolant passage in the coolant jacket.

[0005]

The air cooling of the servo motor by the cooling fan is a cooling of the servo motor itself, and does not prevent the machine from being thermally affected. May worsen the thermal environment.

On the other hand, it is difficult and expensive to incorporate a coolant jacket structure into a housing of a heating element having a complicated outer surface shape such as a servomotor. In particular, it is difficult to incorporate the coolant jacket structure into the housing of a relatively small device such as a servomotor, particularly in terms of cost, and the device becomes bulky, which causes a problem of mounting space.

[0007] In order to prevent the machine from being thermally affected, it is conceivable to enclose the heating element with a heat insulating sheet and to insulate the heating element from outside air. However, in this case, the heat of the equipment does not escape to the outside, the equipment temperature rises,
This causes a problem in the operation stability of the device itself.

The present invention has been made in view of the above-mentioned problems, and can effectively cool and insulate a heating element having a complicated outer surface shape, such as a servomotor. It is an object of the present invention to provide a cooling sheet that can be protected from thermal effects.

[0009]

According to a first aspect of the present invention, there is provided a cooling sheet according to the present invention, wherein a flexible material made of a flexible material is provided with a cooling liquid pipe made of a meander or hairpin. The cooling liquid pipe is configured such that one end of the cooling liquid pipe has a cooling liquid inlet and the other end has a cooling liquid outlet so that the cooling liquid flows through the cooling liquid pipe.

The cooling sheet according to the second aspect of the present invention is characterized in that both sides of the flexible flat bag are welded in a meander shape or a hairpin shape by a high frequency sewing machine or the like, so that the meander is formed inside the flexible flat bag. Or a hairpin-shaped coolant passage is defined, the coolant is configured to flow through the coolant passage with one end of the coolant passage as the coolant inlet and the other end as the coolant outlet, and wound around the object to be cooled. What is used.

The cooling sheet according to the third aspect of the present invention has hook and loop tapes on both side edges, and is fixedly wound around the object to be cooled by connecting the both side edges by the hook and loop tapes. Things.

According to a fourth aspect of the present invention, there is provided a cooling sheet having an opening for allowing a projection existing on an outer surface of a cooled body to escape.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings.

(First Embodiment) FIGS. 1 to 3 show a first embodiment of a cooling sheet according to the present invention. Code 10
Indicates a cooling sheet according to the present invention. The cooling sheet 10 has a single cooling liquid pipe 16 made of a flexible material adhered between two flexible sheets 12 and 14 in a meandering or hairpin shape. The flexible cooling jack has an inlet member 18 attached thereto and a coolant outlet member 20 attached to the other end.

Flexible sheets 12, 14, cooling liquid pipe 1
6 are required to have flexibility and are made of a material having high heat resistance. Materials satisfying these requirements include synthetic resins such as vinyl chloride, polyethylene, and polyimide, silicon rubber, aluminum wheels, and laminate sheets thereof.

As shown in FIG. 1, the cooling sheet 10 is used by being wrapped around an outer periphery of a cooled body (heat generating body) 100 such as a servomotor or the like, and is supplied with a coolant supplied to a coolant inlet member 18. By supplying a coolant whose temperature has been adjusted such as constant temperature water to the coolant inlet member 18 by a hose (not shown), while the coolant flows through the coolant pipe 16, the coolant and the cooled object 100 Heat exchange is performed between the cooling liquid outlet member 20 and the heated coolant is discharged from the coolant outlet member 20 to a coolant supply source through a coolant discharge hose (heating element) connected to the coolant outlet member 20. It is.

Thus, the cooled object 1 such as a servomotor
00 is effectively cooled and adiabatic. Cooling sheet 10
Can be attached to the object to be cooled 100 without any change on the object to be cooled 100, so that it can be retrofitted to the existing object to be cooled 100 having no cooling function as a coolant jacket.

In order to prevent the heat of the object to be cooled 100 from radiating to the outside, that is, to attach importance to heat insulation so that the machine tool or the like is not thermally affected, the flexible sheet 12 on the side of the heating element is What is necessary is just to make the heat conductivity high, and the flexible sheet 14 on the outside air side to have high heat insulation.

As shown in FIG. 2, the cooling sheet 1
Hook and loop tapes 22, 24, which are generally called magic tapes, are adhered to both side edges of the "0".

In this case, the cooling sheet 10 is joined at both side edges thereof by hook and loop tapes 22 and 24 so as to avoid the electric cable and the like connected to the object 100 to be cooled. Can be wound and fixed with one touch.

The developed shape of the cooling sheet 10 is
The cooling sheet 10 may be provided with an opening 26 for allowing a projection existing on the outer surface of the object to be cooled to escape, as shown in FIG. Can be. Thus, the cooling sheet 10 can be fitted to the object to be cooled even if there is a large projection by allowing the large projection of the object to be cooled to escape through the opening 26.

(Embodiment 2) FIGS. 5 and 6 show Embodiment 2 of a cooling sheet according to the present invention. The cooling sheet 30 is formed by welding one surface 32a and the other surface 32b of the flexible flat bag 32 in a meandering or hairpin shape using a high-frequency sewing machine or the like.
2, a meander-shaped or hairpin-shaped coolant passage 34 is defined. A coolant inlet pipe 36 is attached to one end of the coolant passage 34, and a coolant outlet pipe 3 is attached to the other end.
8 is attached. In FIGS. 5 and 6,
Reference symbol A indicates a welded portion between the surfaces 32a and 32b.

The flexible flat bag 32 must have flexibility and is made of a material having high heat resistance. Materials that meet these requirements include vinyl chloride,
There are synthetic resins such as polyethylene and polyimide, silicon rubber, aluminum wheels, and laminate sheets thereof.

As with the cooling sheet 10 of the first embodiment, the cooling sheet 30 is used by being wrapped around the outer periphery of a cooled object (heating element) such as a servomotor, and is connected to the cooling liquid inlet pipe 36. By supplying a coolant whose temperature has been adjusted, such as constant temperature water, to the coolant inlet pipe 36 by a supply hose (not shown), while the coolant flows through the coolant passage 36, the coolant and the object to be cooled are Heat exchange is performed between the cooling liquid outlet pipe 38 and the heated liquid coolant.
Is discharged to the outside or returned to a coolant supply source by a coolant discharge hose (heating element) connected to the cooling water supply hose.

Thus, cooling and heat insulation of the object to be cooled such as the servomotor are effectively performed. Since the cooling sheet 30 is attached to the object to be cooled without requiring any change on the object to be cooled, it can be retrofitted to an existing object to be cooled having no cooling function as a coolant jacket.

The cooling sheet 30 can be wound around the object to be cooled by a hook and loop tape generally called a magic tape, similarly to the first embodiment. The cooling sheet 30 can be freely selected according to the shape of the object to be cooled, and the cooling sheet 30 can be provided with an opening for allowing a protrusion existing on the outer surface of the object to be cooled to escape.

In the above, the present invention has been described in detail with reference to specific embodiments. However, the present invention is not limited to these embodiments, and various embodiments are possible within the scope of the present invention. Will be apparent to those skilled in the art.

[0028]

As will be understood from the above description, according to the cooling sheet according to the first aspect of the present invention, since the entire cooling sheet has flexibility, the outer surface of the object to be cooled (the heating element) is provided. It can be deformed in accordance with the shape, it is used by being wound around the outside of the cooled object whose outer surface shape is complicated, such as a servo motor, and the coolant pipe flows through the coolant pipe attached to the flexible sheet, It can effectively cool and insulate the object to be cooled,
Excellent versatility. In addition, since the cooling sheet can be retrofitted as a coolant jacket on the outside of the object to be cooled, it can be easily attached to an existing servo motor or the like that does not have a cooling function, thereby effectively cooling the servo motor and the like. Can be insulated.

Since the cooling sheet according to the second aspect of the present invention has flexibility as a whole, it can be deformed according to the shape of the outer surface of the object to be cooled (heat generating element).
The outer surface shape is used by being wrapped around the cooled object, and the cooling liquid pipe flows through the cooling liquid passage in the flexible flat bag, so that the cooled object can be effectively cooled and insulated.
Excellent versatility. In addition, since the cooling sheet can be retrofitted as a coolant jacket on the outside of the object to be cooled, it can be easily attached to an existing servo motor or the like that does not have a cooling function, thereby effectively cooling the servo motor and the like. Can be insulated. One end of a coolant passage defined by welding both sides of the flexible flat bag body in a meandering or hairpin shape with a high-frequency sewing machine or the like is used as a coolant inlet, and the other end is used as a coolant outlet. The cooling liquid is configured to flow, and is used by being wound around the object to be cooled.

According to the cooling sheet according to the third aspect of the present invention, the cooling sheet can be wound and fixed to the object to be cooled by the hook and loop tape with one touch with good workability.

According to the cooling sheet according to the fourth aspect of the present invention, the large projection of the object to be cooled is released by the opening, so that the cooling sheet can be fitted to the object to be cooled even if there is a large projection. .

[Brief description of the drawings]

FIG. 1 is a perspective view showing Embodiment 1 of a cooling sheet according to the present invention.

FIG. 2 is a perspective view showing a first embodiment of a cooling sheet according to the present invention in an unfolded state.

FIG. 3 is a sectional view showing Embodiment 1 of the cooling sheet according to the present invention.

FIG. 4 is a perspective view showing a modification of the first embodiment of the cooling seal according to the present invention.

FIG. 5 is a plan view showing Embodiment 2 of the cooling sheet according to the present invention.

FIG. 6 is a sectional view showing Embodiment 2 of the cooling sheet according to the present invention.

[Explanation of symbols]

 Reference Signs List 10 cooling sheet 12, 14 flexible sheet 16 cooling liquid pipe 18 cooling liquid inlet member 20 cooling liquid outlet member 22, 24 hook / loop tape 26 opening 30 cooling sheet 32 flexible flat bag body 34 cooling liquid passage 36 cooling liquid Inlet pipe 38 Coolant outlet pipe 100 Cooled body

Claims (4)

[Claims] 1. A coolant pipe made of a flexible material is stuck on a flexible sheet in a meandering or hairpin shape,
A cooling sheet, wherein one end of the cooling liquid pipe has a cooling liquid inlet and the other end has a cooling liquid outlet so that the cooling liquid flows through the cooling liquid pipe, and is used by being wound around a cooled object. 2. A meander-shaped or hairpin-shaped coolant passage is defined inside the flexible flat bag body by welding both sides of the flexible flat bag body into a meander shape or a hairpin shape using a high-frequency sewing machine or the like. The cooling sheet is configured so that the cooling liquid flows through the cooling liquid passage with one end of the cooling liquid passage as a cooling liquid inlet and the other end as a cooling liquid outlet, and is used by being wound around a cooled object. . 3. A hook-and-loop tape is provided on both side edges, and the hook and loop tape is connected to both side edges to be fixedly wound around the object to be cooled. The cooling sheet according to 1. 4. The cooling sheet according to claim 1, wherein the cooling sheet has an opening for allowing a protrusion existing on an outer surface of the object to be cooled to escape.