JP2007276412A - Flowing fluid heating or cooling apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily and appropriately detect a temperature of a fluid flowing in a piping without affected by a heat capacity, a physical property value (a viscosity, density and the like) of the fluid in a flowing fluid heating or cooling apparatus having a heating or cooling device for heating or cooling by flowing the fluid such as a roller and maintaining the surface of the heating or cooling device at a predetermined temperature based on the detection of a temperature of the fluid flowing into the heating or cooling device. <P>SOLUTION: A stirrer 11 stirring and mixing a fluid flowing at the center part with a fluid flowing in the vicinity of an inner wall in the piping 10 is inserted in the piping 10 connecting a heat exchanger 8, 9 with the heating or cooling device 3, and the temperature of a fluid just after the fluid flowing at the center part is mixed with the fluid flowing in the vicinity of the inner wall in the piping 10 is detected with a detector 12. The simple configuration of inserting the stirrer uniforms a fluid temperature in the piping, which results in the accurate detection of the temperature of the fluid. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a fluid flow heating or cooling device that allows a fluid to flow inside a roller, a plate, or the like, and transmits the temperature of the fluid to the roller, the plate, or the like.

  For example, a processed object such as a resin film is placed on a roller, and the processed object is heated to a predetermined temperature while passing through the roller, or a high-temperature processed object is deprived of heat to a predetermined temperature. Yes. When heat treatment is performed, the roller is heated to a temperature required for the heat treatment. When heat treatment is performed, the temperature of the roller itself increases due to heat removal from the processed material. Cooling. In either case, a medium for transferring heat is required, and a fluid such as oil may be used as the medium.

As described above, in the fluid flow heating or cooling device for maintaining the roller at a predetermined temperature by the flow of the fluid, a heat exchanger for heating or cooling is generally disposed in a circulation path through which the fluid circulates, and the heat exchange is performed. A fluid heated or cooled to a predetermined temperature by a container is supplied into the roller, and heat is applied to the roller by the flow of the fluid heated or cooled to the predetermined temperature, or the heat of the roller is taken away. . Then, the temperature of the fluid flowing into the roller is detected in order to maintain the roller surface temperature at a predetermined temperature, and the detected temperature is compared with a preset target value for setting the roller surface temperature to a predetermined temperature. The temperature of the fluid flowing through the roller is controlled by the deviation.
JP 2004-195888 A

  However, there is a problem that the surface temperature of the roller cannot be quickly set to a predetermined temperature if the calorific value of the fluid, physical property values (viscosity, density, etc.) are changed or the fluid flow rate is changed. As shown in FIG. 3, the cause of this problem is that the fluid 2 flowing in the pipe 10 is affected by heating or cooling from the outside of the pipe, and a fluid having a temperature different from that of the fluid 2b flowing in the center flows in the pipe 10. It is considered that the temperature boundary layer 2a is generated, and the temperature of the fluid 2 in the pipe 10 is detected inappropriately. However, this boundary layer changes both the temperature difference and the thickness of the boundary layer depending on the heat quantity, physical properties (viscosity, density, etc.) of the fluid, and the flow velocity. It is extremely difficult.

A problem to be solved by the present invention is to provide a heating or cooling body such as a roller for heating or cooling by flowing a fluid, and the surface of the heating or cooling body based on detection of the temperature of the fluid flowing into the heating or cooling body. In a fluid flow heating or cooling device in which the temperature is maintained at a predetermined temperature, the temperature of the fluid flowing through the piping is simple and appropriate regardless of the heat quantity, physical properties (viscosity, density, etc.) and flow rate of the fluid. In this respect, it is possible to detect the problem and to solve such a problem.

  The present invention includes a heat exchanger that heats or cools a fluid, a heating or cooling body that heats or cools the fluid heated or cooled by the heat exchanger, and the heating or cooling body and the heat exchanger. And a pipe for sending the fluid heated or cooled by the heat exchanger to the heating or cooling body, and a detector for detecting the temperature of the fluid flowing in the pipe, and the detection temperature of the detector In the fluid flow heating or cooling device in which the surface temperature of the heating or cooling body is controlled based on the above, a stirrer for stirring the fluid flowing through the pipe is provided in the pipe, and the stirrer is provided. The main feature is that the detector detects the temperature of the fluid flowing in the pipe after being interposed.

In the present invention, the fluid flowing along the inner wall of the pipe and the fluid flowing through the center of the pipe are agitated with the fluid flowing in the pipe, so that the temperature of the fluid flowing in the pipe is uniformized as a whole, and temperature detection is performed. The temperature of the fluid flowing through the piping can be properly detected without being affected by the position of the vessel, the calorific value of the fluid, physical properties (viscosity, density, etc.), and changes in flow velocity. The surface temperature of the heater can be quickly brought to a predetermined temperature without being affected by changes in heat quantity, physical property values (viscosity, density, etc.) and flow rate.

A fluid comprising a heating or cooling body such as a roller that heats or cools through a fluid, and maintains the surface of the heating or cooling body at a predetermined temperature based on detection of the temperature of the fluid flowing into the heating or cooling body The purpose of enabling simple and appropriate detection of the temperature of the fluid flowing through the pipe without being affected by the heat quantity, physical properties (viscosity, density, etc.) and flow velocity of the fluid in the flow heating or cooling device. This was realized by providing a stirrer that stirs the fluid flowing through the inner wall and the center of the pipe in the pipe connecting the heat exchanger and the heating or cooling body.

FIG. 1 shows a configuration of a fluid flow heating or cooling device according to an embodiment of the present invention. In FIG. 1, reference numeral 3 denotes a heating or cooling body for heat-treating an object to be processed (the illustrated example constitutes a roller body). 4 is a rotary drive shaft that is rotated by a motor (not shown) to rotate the roll shell 3, 5 is a core, 6 is a rotary joint, 7 is a pump, 8 is a heat exchanger for cooling, and 9 is Heat exchanger for heating, 10 is piping, 11 is a stirrer, 12 is a fluid temperature detector, 13 is a temperature detector on the roller surface, 14 is a rotary transformer, 15 is a temperature controller, 16 is a heating power for a thyristor, etc. A control circuit 17 is a cooling water adjusting electromagnetic valve.

The roll shell 3 has a cylindrical shape, and in this example, a sealed chamber 3a along the longitudinal direction and an insertion hole 3b for inserting a temperature detector are formed inside the wall thickness, and the surface temperature of the roll shell 3 is formed in the insertion hole 3b. A temperature detector 13 for detecting the temperature is disposed, and a gas-liquid two-phase heat medium such as water for equalizing the surface temperature of the roll shell 3 by latent heat transfer is enclosed in the sealed chamber 3a. And the core 5 is arrange | positioned in the hollow inside of the roll shell 3, and the through-flow path 5a is formed through the center part of the core 5. As shown in FIG. The flow path 5a is connected to the inlet of the rotary joint 6 through the rotary drive shaft 4, and the flow path 3c formed between the inner peripheral wall of the roll shell 3 and the outer peripheral wall of the core 5 is the rotary drive shaft. 2 and connected to the outlet of the rotary joint 6.

The fluid flowing through the roll shell 3 flows through the pipe 10 by the pump 7 and circulates through the cooling heat exchanger 8 and the heating heat exchanger 9 in this order. The cooling heat exchanger 8 appropriately cools the fluid flowing through the pipe 10 through the cooling water. The heating heat exchanger 9 has an electric heater, and the fluid flowing through the pipe 10 is heated to a predetermined temperature by this heater and sent into the roll shell 3. A temperature detector 12 is inserted and arranged in the pipe 10 sent from the fluid heater 9 into the roll shell 3. The temperature detection signal of the temperature detector 12 and the temperature detection of the temperature detector 13 arranged in the roll shell 3 are detected. The signal is input to the temperature controller 15 and compared with a preset target value, and the deviation signal is sent to the heating power control circuit to control the power supplied to the electric heater, that is, the temperature of the fluid. Further, the output signal of the temperature regulator 15 controls the coolant adjustment electromagnetic valve 17 to increase the temperature response speed of the fluid accompanying the temperature fluctuation. In the embodiment, the cooling heat exchanger 8 and the heating heat exchanger 9 are provided, but only one of the cooling heat exchanger and the heating heat exchanger may be used.

In the pipe between the fluid heater 9 and the temperature detector 12 according to the present invention, the heating fluid flowing through the inner wall and the center of the pipe 10 as shown in FIGS. A stirrer 11 for stirring is inserted. The stirrer 11 shown in FIG. 2 has a cylindrical body 11a made of, for example, SUS having the same diameter as the inner diameter of the pipe 10, and a round bar having a diameter of about 5 mm and having a substantially inner diameter dimension of the cylindrical body 11a. It consists of fence bodies 11b and 11c, and is fixed so that the fence bodies 11b and 11c are appropriately spaced inside the cylinder body 11a so that one fence body 11b and the other fence body 11c do not overlap with the direction of fluid flow. Configured.

With this simple configuration of inserting the stirrer 11 into the pipe 10, the fluid flowing near the inner wall of the pipe 10 and the fluid layer flowing through the central part are mixed and flow through the central part of the pipe 10 as shown in FIG. 3. The thickness of the fluid layer 2a flowing near the inner wall at a temperature different from the temperature of the fluid 2b becomes thin regardless of the heat quantity, physical properties (viscosity, density, etc.) and flow velocity of the fluid. By detecting the above, it is possible to appropriately detect the temperature of the fluid flowing through the pipe without being affected by the calorie of the fluid, the physical property values (viscosity, density, etc.), and the flow velocity. By this detection, the surface temperature of the roller can be quickly set to a predetermined temperature even if the calorific value of the fluid, physical property values (viscosity, density, etc.) are changed, or the fluid flow rate is changed.

In the above embodiment, the stirrer 11 is constituted by a fence body in which a round bar is formed in a cross shape. However, the present invention is not limited to this structure, and the fluid flowing near the inner wall of the pipe and the fluid flowing in the center are mixed. Any other turbulence generator may be used as long as the temperature of the fluid flowing in the pipe can be made uniform.

In the above embodiments, the heating or cooling body is a roller, but the heating or cooling body is not limited to a roller, and may be a flat heating plate or a roll, for example. In this case, a sealed chamber that encloses a gas-liquid two-phase heat medium such as water that equalizes the surface temperature by latent heat transfer may be formed within the thickness of the flat heating plate or roll.

Furthermore, although the above embodiment is for controlling the temperature of the fluid by detecting the temperature of the fluid, it is also applicable to the case where the flow rate of the fluid is controlled by detecting the temperature of the fluid.

It is a block diagram of the fluid flow heating or cooling device which concerns on the Example of this invention. It is a figure which shows the structure of the stirrer which concerns on the Example of this invention, (a) is a front view, (b) is sectional drawing, (c) It is a rear view. It is explanatory drawing of the temperature distribution of the fluid which flows through piping.

Explanation of symbols

2 Fluid 3 Roll shell 4 Rotating drive shaft 5 Core 6 Rotary joint 7 Pump 8 Cooling heat exchanger 9 Heating heat exchanger 10 Pipe 11 Stirrer 11a Tubular body 11b, 11c Fence body 12 Fluid temperature detector 13 Roller Surface temperature detector 14 Rotating transformer 15 Temperature controller 16 Heating power control circuit 17 Cooling water adjusting solenoid valve

Claims (2)

  A heat exchanger that heats or cools the fluid, a heating or cooling body that heats or cools the fluid heated or cooled by the heat exchanger, and the heating or cooling body and the heat exchanger are connected to each other. A pipe that sends the fluid heated or cooled by the heat exchanger to the heating or cooling body, and a detector that detects the temperature of the fluid flowing in the pipe, and based on the detected temperature of the detector In the fluid flow heating or cooling device in which the surface temperature of the heating or cooling body is controlled, a stirrer for stirring the fluid flowing in the pipe is provided in the pipe, A fluid flow heating or cooling device, wherein the temperature of the fluid flowing in the pipe is detected by the detector.   The fluid flow heating or cooling device according to claim 1, wherein the heating or cooling body is a roller through which a fluid flows.

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