JP3110324U - One-pass chiller using grooved double pipe - Google Patents

Abstract

A cooling system that cools high-temperature water in one pass and discharges the same amount is provided.
A grooved double pipe 1 is wound into a square shape and a pump 2 is installed in a central space. The water circulation circuit pumps the water in the water tank 4 from the water absorption pipe 10 by the pump, cools each double-grooved double pipe in the forward header 5, joins in the return header 6, and returns to the water tank in the discharge pipe 9. The water is cooled while traveling around this circuit at high speed. Part of this water is taken out from the discharge pipe 7 and used. The same amount is supplied from the water supply port 8.
[Selection] Figure 1

Description

Detailed description of the invention

  Document name attached Figure 1 shows the overall structure. The grooved double pipe (heat exchanger tube) (1) is wound in a square shape and the pump (2) is installed in the central space. The number of grooved double pipes is determined according to the required specifications. Two are adopted and connected in parallel by headers.

  The water circulation circuit draws water from the water tank (4) from the water supply pipe (10) with the pump (2), branches off the two grooved double pipes at the forward header (5), and this grooved double pipe The water is cooled and merged with the return header (6) and returned to the water tank with the discharge pipe (9). While circulating this circuit at high speed, the water in the water tank is cooled to the set temperature while detecting the water temperature with the sensor (13).

  Discharge pipe (7) is attached to the return header and discharges externally with the residual pump pressure. The reduced amount of water in the aquarium is intermittently replenished through the water injection pipe (8). For large models, instead of water tap ball taps, float switches and solenoid valves are substituted.

The headers (5) and (6) are not installed on the exit side and extension line of the grooved double pipe, but are arranged on the inside as shown in the figure and connected by a U-shaped pipe for the purpose of saving space.

  Because it cools to near 0 ° C, freezing begins on the grooved double pipe and the inner wall, eventually clogging the inner pipe and there is a risk of damaging the refrigerator. In order to prevent this, a small diameter bypass pipe is provided in the return header (6) and a flow switch (11) is attached. Flow rate reduction of the main circuit due to freezing is proportionally sensed by the flow switch, and a signal is obtained to stop the refrigerator.

  The amount of water in the tank is important. If the amount of water to be injected and the water temperature are fixed, and the water temperature of the same amount of water to be discharged is fixed, the water tank is unnecessary. There is no worry about freezing. In reality, there are no refrigerators that meet this condition, and the conditions change. It is this aquarium that can buffer this.

  When the refrigeration conditions drop, the remaining refrigeration function heat is stored in the water in the aquarium, and the refrigerator is stopped and intermittent operation is performed. This machine has the minimum amount of water that does not interfere with this intermittent operation. The amount of water is determined by the discharge water amount, the inlet / outlet temperature difference, and the on / off temperature difference (DIFF) of the tank water temperature. As a rule of thumb, it is about 25 liters per 1 horsepower of the refrigerator.

  The whole structure, the upper unit part and the lower water tank part can be separated. The upper unit can be directly connected to a large tank for general chillers. In addition, a cleaning port (3) is provided in the upper part of the lower water tank so that it can be inspected and cleaned with high-pressure water.

  This machine is a combined unit of heat exchanger (double grooved pipe), pump and water tank, and the refrigerator is installed separately. Therefore, various types of refrigerators can be freely selected depending on the application and installation conditions.

  The thermostat to be connected with the submersible sensor (13) attached to the return header (6), select the one with a temperature control range and a lower limit value of 0 ° C or higher so that the minus side cannot be set to prevent freezing.

  In the above system, for example, when tap water is directly connected and summer water temperature of 25 ° C. × 13 l / min is constantly supplied to continuously obtain 2 ° C. discharge water, the grooved double pipe (heat exchanger) 20 of this machine is used. 000 kcal / hour (freezer 10 horsepower) may be selected. Even in the case of changing conditions, there is a restriction on intermittent operation of the refrigerator, but one-pass cooling is possible within the range of 20,000 kcal / hour.

  Like a general chiller, it has a large water tank, and it is not possible to use a large amount of this water temporarily by cooling it with a small capacity heat exchanger (refrigerator) over time. This is a system that continuously cools the water temperature with the same amount of water injection and discharge.

  Applications include food factories (udon, tofu, vegetables, etc.), fishery processing factories, beverage factories (shochu, seasonings, etc.) that are suitable for applications where the cooling conditions (water temperature, water volume) are relatively fixed and used continuously.

[Figure 1]
〔Diagram〕

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Double grooved pipe 8 Water supply port 2 Pump 9 Return pass 3 Cleaning port 10 Outgoing pipe 4 Water tank 11 Freezing prevention flow switch 5 Outgoing header 12 Refrigerant inlet / outlet 6 Return header 13 Sensor 7 Discharge port

Claims (2)

  A grooved double pipe (heat exchanger tube) with a heat transfer area necessary for one-pass cooling is wound in a square shape, and the fastest circulating pump with the same capacity is arranged in the central space. A water tank having a minimum amount of water necessary for intermittent operation (ON, OFF) of the refrigerator (condensing unit) is combined with the upper unit and the lower part. The water can be circulated at high speed up and down, and the high-temperature water injected into this circuit can be cooled and discharged in the same amount. As a freeze prevention measure, a small pipe diameter bypass having a float switch is provided from the main circuit, and a freezing signal is obtained from this float switch, and the refrigerator (condensing unit) is stopped.

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