JPH06313660A - Vacuum cooler with pseudo-cooling temperature measuring apparatus - Google Patents

Abstract

PURPOSE:To provide a vacuum cooler having a pseudo-cooling temperature measuring apparatus for controlling completion of cooling by vacuum-cooling weak warm water contained in a water tank simultaneously with object to be cooled, measuring a cooling temperature of the water and using the temperature as pseudo-cooling temperature of the object to be cooled. CONSTITUTION:A vacuum cooler having a pseudo-cooling temperature measuring apparatus to vacuum-cool a plurality of containing vessels 301 of a predetermined size contained comprises a water tank 101 of the same volume as or larger volume than that of the vessel 301, wherein an evaporating chamber is formed in an upper space of a water surface of the tank, a cooling chamber 1 is connected to the chamber of the tank 101 via a vent tube, and a thermometer is provided in the tank 101.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cooling for cooling an article by utilizing the property that the temperature of the article is lowered by releasing latent heat of vaporization of a water-containing article placed in a vacuum state in order to cool the article rapidly. The present invention relates to an apparatus for measuring a cooling temperature of an article of a machine, and more particularly to an apparatus for measuring a cooling temperature of an article of a vacuum cooler which cools chemicals, chemical products, and foods having a large water content in a vacuum state.

[0002]

2. Description of the Related Art Conventionally, in a vacuum cooler, a storage container having a uniform size is often used, and the storage amount is often around 17 kg because of workability. When the objects to be cooled are put in a plurality of storage containers in this way and vacuum-cooled, the temperature of the objects to be cooled is measured by inserting a temperature sensor into the object to be cooled in a typical storage container.

Further, when the temperature sensor is not used,
Using a timer, the cooling time is measured in advance for each weight of the object to be cooled, and each time the cooling time is set, cooling is performed.

[0004]

In the former one of those described in the prior art, the temperature sensor is 1 to 2.5 m.
Cable or wire is generally used,
Since it is detached each time it is cooled, it is severely damaged, and there is also an accident in which the worker carries out the storage container and disconnects it without removing the temperature sensor. Further, there is a problem that the temperature sensor must be washed each time when cooling the food.

In the latter case, there is a problem that the set value of the timer has to be changed each time, and an unskilled worker is apt to cause "insufficient cooling" and "overcooling" due to erroneous operation. It was

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to vacuum-cool low temperature water contained in a water tank at the same time as an object to be cooled, It is intended to measure the cooling temperature of this weak water and control the completion of cooling by using this temperature as a pseudo temperature of the object to be cooled, and to provide a vacuum cooler equipped with a pseudo cooling temperature measuring device for that purpose. To do.

[0007]

In order to achieve the above object, the apparatus of the present invention is a vacuum cooler for accommodating a plurality of accommodating containers of a certain size and vacuum-cooling the same or larger capacity than the accommodating container. A pseudo-cooling temperature, characterized in that a water tank is provided, the space above the tank water surface is used as an evaporation chamber, the cooling chamber and the water tank evaporation chamber are connected by a ventilation pipe, and a water thermometer is installed in the water tank. It is a vacuum cooler equipped with a measuring device.

The water tank for pseudo temperature measurement is installed either independently of the cooling chamber or on the ceiling or side of the cooling chamber. In the water tank, the space above the water surface is used as an evaporation chamber, an automatic drain valve, a water tank water level sensor and a water tank temperature sensor are installed, and an auxiliary device is a weak hot water tank with a heating device that supplies weak hot water for each cooling. Set up.

Further, it is desirable that the evaporation area of the evaporation chamber be equal to the opening area of the storage container. By doing so, the water in the water tank can be cooled under substantially the same conditions as the object to be cooled in the storage container, and a pseudo cooling temperature close to the actual cooling temperature of the object to be cooled can be obtained.

Further, as an operation, the temperature of the slightly warm water to be put in the water tank is set to be about 10 ° C. higher than the cooling end temperature of the object to be cooled. As a result of various studies, it is desirable that the amount of water to be stored in the water tank and the low temperature water tank be approximately the same as the heat capacity of the object to be cooled stored in a single container. This heat capacity is “(weight of cooling object) × (specific heat of cooling object)”.

[0011]

[Function] A water tank having the same capacity as or larger than that of the storage container is provided, the space above the water surface of the tank serves as an evaporation chamber, the cooling chamber and the water tank evaporation chamber are connected by a ventilation pipe, and the water thermometer is connected to the water tank. It is preferable that the evaporation temperature of the evaporation chamber is equal to the opening area of the storage container. This way,
The water in the water tank can be cooled under substantially the same conditions as the object to be cooled in the storage container, and a pseudo cooling temperature close to the actual cooling temperature of the object to be cooled can be obtained.

[0012]

EXAMPLES Examples will be described with reference to the drawings. FIG. 1 is an explanatory view of a vacuum cooler equipped with a pseudo cooling temperature measuring device. On a side surface of the cooling chamber 1, there is an entrance / exit door 2 for taking in and out of stored items, and in order to maintain a vacuum, the circumference of the entrance / exit door 2 is shown. Is an airtight packing 3 that keeps airtightness, cooling chamber 1
The storage container 301 in which the object to be cooled 401 is put is stored in the storage container fixing support 5. An exhaust port 4 is provided above the cooling chamber 1, and an exhaust pipe 9 is connected to a vacuum generation source (vacuum pump) for exhaust.

The space above the water surface of the water tank 101 is the evaporation chamber 1
12 is formed, and in the evaporation chamber 112, the cooling chamber 1 and the evaporation chamber 112 have the same atmospheric pressure by the ventilation pipe 102 communicating with the exhaust port 4. The water tank 101 has a water tank water level sensor 20.
The water level is determined by 1, and the temperature is displayed by the water tank temperature sensor 202. Further, there is a drainage automatic valve 103 at the lower part of the water tank 101, and a weak hot water injection automatic valve 104 at the upper part of the water tank 101 for shutting off the weak hot water tank 105. The weak hot water tank 105 has a weak hot water tank water level sensor 203, A weak hot water tank temperature sensor 204 is provided.

In addition, an automatic main valve 107 for supplying pressurized fresh water, a temperature controller 108, and a heater 106 are provided to turn the pressurized fresh water into weak hot water, and the heated weak hot water passes through a water supply pipe 109 to weaken it. It is stored in the hot water tank 105.

Next, the operation of the vacuum cooler equipped with the pseudo cooling temperature measuring device of the present invention will be described with reference to FIG. First, the vacuum cooler is operated in the same way as a normal vacuum cooler. Opening the entrance / exit door, carrying in the object to be cooled, closing the entrance / exit door, and starting the vacuum pump starts vacuum cooling. . When the vacuum pump is operated, the cooling chamber is decompressed, and the cooling water is evaporated to cool the cooling target. When cooling is completed, the vacuum cooling is stopped and the internal pressure of the cooling chamber is set to atmospheric pressure, and then the door door Open
Carry out the cooled product.

On the other hand, in the pseudo cooling temperature measuring device, when the internal pressure of the cooling chamber of the vacuum cooler becomes atmospheric pressure, the automatic drain valve of the water tank opens to drain the water that has been cooled, and the water tank water level sensor sets the lower limit. As shown, by closing the automatic drain valve of the water tank and opening the water tank low temperature hot water automatic water injection valve, low temperature hot water previously heated by the heater is injected into the water tank.
When weak water is injected and the water tank water level sensor shows the upper limit and reaches an appropriate water level, the water tank weak water automatic water injection valve is closed, the pseudo cooling temperature measuring device becomes measurable, and if vacuum cooling is performed thereafter, The slightly warm water in the water tank is cooled, and the pseudo cooling completion value of the object to be cooled can be known from the temperature of the water tank temperature sensor.

[0017]

Since the present invention is configured as described above, it has the following effects. In a vacuum cooler that accommodates a plurality of storage containers of a certain size and performs vacuum cooling, a water tank with the same capacity or a larger size as the storage containers is provided, and the space above the water surface of the tank serves as an evaporation chamber, and a cooling chamber and a water tank evaporation chamber. Since it is a vacuum cooler equipped with a pseudo-cooling temperature measuring device characterized by connecting a ventilation pipe between them and installing a water thermometer in the water tank, when detecting the completion of cooling with a timer, It is bothersome to change the set value each time, and for the unskilled worker, it does not cause "insufficient cooling" or "over cooling" due to erroneous operation, and in the case of the temperature sensor, the operator forgets to remove the temperature sensor. Damage to the temperature sensor and damage caused by detaching the temperature sensor can be avoided, and the completion of cooling of the object to be cooled can be known by the pseudo cooling temperature measuring device. Kill.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view of a vacuum cooler equipped with a pseudo cooling temperature measuring device of the present invention,

FIG. 2 is an operation flow of a vacuum cooler equipped with the pseudo cooling temperature measuring device of the present invention.

[Explanation of symbols]

 1 Cooling Room 2 Door Door 3 Airtight Packing 4 Exhaust Port 9 Exhaust Pipe 101 Water Tank 102 Vent Pipe 103 Automatic Drainage Valve 104 Low Temperature Hot Water Injection Automatic Valve 105 Low Temperature Water Tank 112 Evaporation Room 201 Water Tank Water Level Sensor 202 Water Tank Temperature Sensor 203 Weak Hot water tank water level sensor 204 Weak hot water tank temperature sensor 301 Storage container 401 Cooling target

Claims (1)

[Claims] 1. A vacuum cooler for accommodating a plurality of accommodating containers of a certain size and vacuum-cooling, wherein a water tank having the same capacity as or larger than that of the accommodating containers is provided, and the space above the water surface of the tank serves as an evaporation chamber and the cooling chamber A vacuum cooler equipped with a pseudo-cooling temperature measuring device, characterized in that a water thermometer is installed in the water tank, and the water tank evaporation chamber is connected with a ventilation pipe.