JP2011085329A - Heating-cooling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a heating-cooling device which accurately maintains cooling temperatures at a predetermined value during switching from heating to cooling by preventing condensate from remaining on the heat exchange face of a heat exchange container. <P>SOLUTION: A cooling water supply pipe 5 is connected to the heat exchange container 1 via an automatic valve 12. The heat exchange face 2 is arranged on the upper face of the heat exchange container 1. A blowing device 22 blowing off water on the lower face 19 of the heat exchange face 2 is mounted. The lower end of the heat exchange container 1 is connected to the suction chamber 10 of a suction means 6 via a pipe line 8. The suction means 6 comprises a liquid ejector 13, a cooling water tank 14 and a circulation pump 15. Condensate obtained by condensation of steam on the lower face 19 of the heat exchange face 2 is blown off by the blowing device 22 and made to fall in drops, without remaining on the lower face 19. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

 The present invention relates to a heating / cooling device that heats or cools an object to be heat exchanged by reducing the pressure inside the heat exchange container.

In the conventional heating and cooling device, an electric motor is connected to the cooling water injection nozzle, and the cooling water injection nozzle is rotated by this electric motor, so that the cooling target can be cooled to a larger area with a few cooling water injection nozzles. Water can be injected.

The conventional heating and cooling apparatus has a problem that the cooling temperature cannot be accurately maintained at a predetermined value when switching from heating to cooling. This is because, when switching from heating to cooling, condensate as the condensed water of the heating steam used at the time of heating remains unevenly on the heat exchange surface. That is, since the temperature is greatly different from the temperature of the cooling water, the cooling temperature cannot be accurately maintained at a predetermined value.

JP-A-7-208847

  The problem to be solved is that the condensate hardly remains on the heat exchange surface of the heat exchange container, so that the cooling temperature can be accurately maintained at a predetermined value when switching from heating to cooling. Is to get.

 The present invention supplies a heating or cooling fluid to a heat exchange container via a valve and connects a suction means for maintaining the inside of the heat exchange container in a reduced pressure state so that the heat exchange object of the heat exchange container is In the case of heating or cooling, a blowing device for supplying compressed air to the heat exchange surface of the heat exchange vessel to blow off water is arranged.

  In the present invention, the condensate as the condensed water of the steam for heating when the switching from the heating to the cooling is performed by arranging the blow device for supplying the compressed air to the heat exchange surface of the heat exchange container and blowing off the water, Since it does not remain by being blown off from the heat exchange surface by the blowing device, the cooling temperature can be accurately maintained at a predetermined value when switching from heating to cooling.

It is a block diagram which shows the Example of the heating-cooling apparatus which concerns on this invention.

In the present invention, a blower is disposed on the heat exchange surface of the heat exchange vessel, and any conventionally known blower can be used.

  In FIG. 1, a cylindrical and flat heat exchange vessel 1, a heat exchange surface 2 formed horizontally on the upper end surface of the heat exchange vessel 1, and steam for supplying heating vapor into the heat exchange vessel 1 The supply pipe 3 and the suction means 6 communicating below the heat exchange container 1 constitute a heating / cooling device.

A control valve 7 for controlling the amount of steam supplied to the heat exchange container 1 is attached to the steam supply pipe 3. The heat exchange surface 2 is heated by the steam for heating supplied from the steam supply pipe 3 to the heat exchange vessel 1. A blow device 22 that supplies compressed air to the lower surface 19 of the heat exchange surface 2 to blow off water is attached to the side surface of the heat exchange container 1. A compressed air supply pipe 21 that supplies compressed air is connected to the blow device 22.

A cooling water supply pipe 5 for supplying cooling water to the heat exchange vessel 1 is connected. The lower end of the cooling water supply pipe 5 is connected to a part of the suction means 6. The cooling water supply pipe 5 is connected to the cooling water injection nozzle 20 of the heat exchange container 1 through a water ejector 11 and an automatic valve 12. When the automatic valve 12 is opened, the cooling water is injected and supplied from the cooling water injection nozzle 20 to the lower surface 19 of the heat exchange surface 2.

A steam supply pipe 16 is connected to the suction chamber of the water ejector 11 attached to the cooling water supply pipe 5. By supplying the heating steam from the steam supply pipe 16 to the cooling water flowing down in the water ejector 11, the temperature of the cooling water supplied to the heat exchange container 1 can be adjusted.

A cooling water circulation valve 18 is attached in parallel with the automatic valve 12 attached to the cooling water supply pipe 5. The cooling water circulation valve 18 is always opened slightly, and even if the automatic valve 12 is closed, a small amount of cooling water is supplied into the heat exchange container 1 and a part of the cooling water is continuously circulated. It is.

The lower end of the heat exchange vessel 1 is connected to the inlet side of the steam trap 4 by a pipe line 8. An on-off valve 9 is attached in parallel with the steam trap 4. The outlet side of the steam trap 4 and the on-off valve 9 is connected to the suction chamber 10 of the liquid ejector 13 constituting the suction means 6.

The suction means 6 includes a liquid ejector 13, a cooling water tank 14, and a circulation pump 15. By driving the circulation pump 15, the cooling water in the cooling water tank 14 is supplied to the liquid ejector 13 to generate a predetermined suction force in the suction chamber 10, and the cooling water is supplied from the cooling water supply pipe 5 to the heat exchange container 1. To supply.

A cooling water supply pipe 30 is connected to the upper part of the cooling water tank 14, and a pipe on the discharge side of the circulation pump 15 is branched to connect an excess water discharge pipe 17.

  When heating the heat exchange surface 2, the heat exchange surface 2 is heated by steam by supplying a predetermined amount of steam from the steam supply pipe 3 and the control valve 7 into the heat exchange container 1. Condensate condensed with steam by heating on the lower surface 19 of the heat exchange surface 2 is blown off by the blow device 22, so that it does not remain on the lower surface 19. Further, the condensate in the heat exchange vessel 1 passes from the pipe line 8 at the lower end of the heat exchange vessel 1 through the steam trap 4 and further from the liquid ejector 13 to the cooling water tank 14.

  When switching the heat exchange surface 2 from heating to cooling, the condensate does not remain on the lower surface 19 of the heat exchange surface 2, so the automatic valve 12 of the cooling water supply pipe 5 is opened and cooling water injection is performed. The cooling temperature supplied from the nozzle 20 can accurately maintain the cooling temperature at a predetermined value. The cooling water supplied from the cooling water injection nozzle 20 evaporates by the heat of the heat exchange surface 2 and is cooled with the latent heat of evaporation, whereby the cooling efficiency can be improved.

  It can be applied as various heating and cooling devices that perform indirect heating and cooling.

DESCRIPTION OF SYMBOLS 1 Heat exchange container 2 Heat exchange surface 5 Cooling water supply pipe 6 Suction means 10 Suction chamber 11 Water ejector 12 Automatic valve 13 Liquid ejector 14 Cooling water tank 15 Circulation pump 18 Cooling water circulation valve 19 Lower surface 20 Cooling water injection nozzle 21 Compressed air supply Tube 22 Blow device

Claims (1)

  A heating or cooling fluid is supplied to the heat exchange container via a valve, and a suction means for maintaining the inside of the heat exchange container in a reduced pressure state is connected to heat or cool the heat exchanged object in the heat exchange container. A heating / cooling device comprising a blower for supplying compressed air to a heat exchange surface of a heat exchange vessel to blow off water.