JPH0515774A - Heating and cooling apparatus - Google Patents

Abstract

PURPOSE:To obtain a heating and cooling apparatus capable of performing steam heating or evaporation cooling even at relatively low temp. of about 50 deg.C or lower. CONSTITUTION:A steam supply port 9, a cooling water supply port 10 and fluid discharge ports 12, 13 are provided to the jacket part 5 of a reaction vessel 21 and a steam supply pipe 2 is connected to the steam supply port 9 and branched to be allowed to communicate with the nozzle 25 of an ejector 22 through an automatic valve 24. The fluid discharge ports 12, 13 are connected to the suction chamber 28, 29 of the ejector 22. A separator 30 is arranged on the secondary side of the ejector 22 to connect a steam trap 31 and a three- way changeover valve 32.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating / cooling apparatus for performing heating and cooling by a single apparatus, and more particularly, a heating / cooling chamber is maintained at a low pressure by suction means so that heating and cooling can be performed at a temperature of about 100 degrees. The present invention relates to a heating / cooling device. In particular,
It is used as a heating / cooling device for a reaction kettle that performs various reactions, a heating / cooling device for food, etc.

[0002]

2. Description of the Related Art As a conventional heating and cooling device for a reaction kettle, there is one disclosed in Japanese Patent Laid-Open No. 1-315336. This is a combination pump that combines an ejector, a tank, and a pump, a switching valve means that can supply heated steam to the fluid chamber of the reaction vessel, and a part of the discharge water of the combination pump as cooling water, and passes through the inside of the ejector. A temperature control unit for controlling the temperature of the fluid is provided, and heating water is supplied to the fluid chamber of the reaction vessel or discharge water from a combination pump for cooling to heat and cool the reaction vessel. The suction force generated in the ejector, that is, the degree of pressure reduction, becomes a saturation pressure with respect to the temperature of the fluid passing through the ejector, so the degree of pressure reduction in the ejector is increased,
By increasing the degree of pressure reduction in the cooling chamber, heating and cooling can be performed at a temperature of 100 degrees or less.

[0003]

The above-mentioned conventional devices have a problem that the degree of pressure reduction cannot be sufficiently increased and heating and cooling cannot be carried out at a relatively low temperature, for example, a temperature of 20 degrees or 30 degrees. This is because the degree of pressure reduction generated at the ejector can be increased only up to the saturation pressure with respect to the temperature of the cooling water passing therethrough. Industrial water such as groundwater is generally used as cooling water, but this temperature is usually about 25 degrees, and at most about 50 degrees due to steam supplied for heating and heat from the object to be cooled. It can only be reduced to the temperature of.

Therefore, a technical object of the present invention is to obtain a heating / cooling device capable of heating and cooling even at a temperature of about 50 ° C. or lower.

[0005]

The structure of the reduced pressure evaporative cooling apparatus of the present invention is as follows. A heat exchanger having a heating / cooling chamber, a pipeline for supplying steam and cooling water to the heating / cooling chamber, and a suction means communicating with the heating / cooling chamber, wherein a steam ejector is arranged as the suction means, The supply pipe line and the nozzle portion of the steam ejector are connected, and the suction chamber of the steam ejector and the heating / cooling chamber are communicated with each other.

[0006]

By using a steam ejector as the suction means and creating a depressurized state by the steam for heating, a high degree of depressurization can be maintained regardless of the temperature of the cooling water.
Therefore, the vaporization cooling chamber is also in a highly depressurized state, and heating and cooling can be performed even at a low temperature of 50 ° C. or less.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The illustrated embodiment will be described in detail. In this example, a jacket-type reaction vessel is used as the heat exchanger. A heating / cooling device is constituted by the reaction vessel 21 having a jacket as a heating / cooling chamber, the ejector 22, the steam supply pipe 2, and the cooling water supply pipe 3. Reaction kettle 21
Has a jacket portion 5 formed over substantially the entire circumference and is provided with a raw material inlet 6, a product outlet 7, and an agitator 8. The jacket portion 5 has a steam supply port 9, a cooling water supply port 10, and a fluid discharge port 12, 13 is provided.

The steam supply pipe 2 is connected to the steam supply port 9 via a pressure control valve 23. The steam supply pipe 2 also has an automatic valve 24.
Through the nozzle 25 of the ejector 22. Fluid ejecting chambers 28 and 29 are provided in the ejector 22 and are connected to the fluid outlets 12 and 13 of the jacket portion 5. A separator 30 for separating liquid and vapor is connected to the secondary side of the ejector 22. The lower part of the separator 30 is connected to the steam trap 31, and the upper part is connected to the three-way switching valve 32. To the three-way switching valve 32, a separated steam exhaust pipe 35 and a pipe 36 for supplying a separate steam-using device are connected.

The cooling water supply pipe 3 is connected to the cooling water supply port 10 via an automatic valve 50. Reference numerals 51 and 52 denote automatic valves, respectively, and reference numeral 53 is a steam trap for eliminating drain in the vapor supplied to the nozzle 25.

When heating the reaction kettle 21, the pressure control valve 23 and the automatic valve 24 are opened to supply steam to the jacket 5 and the ejector 22. By the suction force of the ejector 22, the inside of the jacket portion 5 is depressurized, and the opening of the pressure control valve 23 is narrowed, so that the vapor in the jacket portion 5 becomes atmospheric pressure or less and the temperature becomes 100 degrees or less. By adjusting the opening degree of the automatic valve 24 and increasing the amount of steam supplied to the nozzle 25, the degree of pressure reduction in the ejector 22 is increased, and the steam temperature in the jacket portion 5 can be set to about 50 degrees or less. Drain generated by heating the reaction kettle 21 is sucked into the ejector 22 from the fluid outlet 12, and the remaining vapor is sucked into the ejector 22 from the fluid outlet 13 as well. The drain and the vapor sucked into the ejector 22 are separated by the separator 30, and the drain is the steam trap 3
After being discharged to the outside of the system via 1, the steam is discharged to the outside of the system via the three-way valve 32, or is separately supplied to a steam using device.

When the reaction vessel 21 is cooled, the pressure control valve 2
3 is closed to stop the supply of steam to the jacket 5, and the valve 50 is opened to supply cooling water to the jacket 5. The inside of the jacket portion 5 is depressurized by the ejector 22, and the supplied cooling water is the reaction kettle 2 serving as the object to be cooled.
The heat of 1 immediately evaporates and the latent heat of vaporization cools the reaction vessel 21. The vaporized steam generated by cooling and the partially remaining cooling water are sucked into the ejector 22, and the cooling water is steamed.
The vaporized vapor is exhausted from the mutrap 31 through the exhaust pipe 35 to the outside of the system.

In this embodiment, an example in which one ejector 22 is used is shown, but ejectors can be connected to the fluid discharge ports 12 and 13, respectively.

[0013]

EFFECTS OF THE INVENTION A high depressurized state can be created by a steam ejector regardless of the temperature of cooling water, and heating and cooling at a relatively low temperature of about 50 degrees or less can be performed.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of a heating / cooling device of the present invention.

[Explanation of symbols]

 2 Steam supply pipe 3 Cooling water supply pipe 5 Jacket part 12, 13 Fluid discharge port 22 Ejector 23 Pressure control valve 25 Nozzle 30 Separator

Claims (1)

Claim: What is claimed is: 1. A heat exchanger comprising a heating / cooling chamber, a pipeline for supplying steam and cooling water to the heating / cooling chamber, and a suction means communicating with the heating / cooling chamber. A heating / cooling device in which a steam ejector is arranged as a suction means, the above-mentioned steam supply pipe line and a nozzle portion of the steam ejector are connected, and a suction chamber of the steam ejector and a heating / cooling chamber are communicated with each other.