JPS6011981Y2 - Underfloor frost heaving prevention device in cold storage warehouses - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an underfloor frost heaving prevention device for a large refrigerated warehouse.

Insulating materials are installed on the floors of such large-scale cold storage warehouses, but the cold temperature inside the warehouse flows through the concrete columns of the warehouse and flows below the floor, and the moisture in the soil is added, making it easy for the area around the foundation to freeze. Become something.

This freezing phenomenon causes the ground to rise, and in severe cases, the foundation of the warehouse may rise, cracks may appear in columns, walls, and floors, and the warehouse itself may become unusable.

In order to prevent such frost heave phenomenon, conventionally, a ventilation layer such as a bit is installed under the warehouse floor to naturally ventilate the area and block cold temperatures.

However, large warehouses have a large floor area, so they have the disadvantage that they cannot provide ventilation to all surfaces under the floor.

Another option is to forcibly send hot air under the floor, but this requires constant use of a blower, which increases operating energy costs, and also requires the installation of a duct for hot air. Construction costs will also be high.

An object of the present invention is to provide an underfloor frost heaving prevention device for a refrigerated warehouse that can eliminate the above-mentioned disadvantages and also improve the operating efficiency of the refrigeration equipment.

However, according to the present invention, the purpose of the lever is to provide a heat exchanger in the middle of the cooling circulation waterway to the condenser that constitutes the refrigeration system, and to arrange one end of the heat radiation tube using a heat pipe in this heat exchanger. This is achieved by attaching the other end of the heat dissipation pipe to the concrete framework of the foundation of the refrigerated warehouse.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

The figure is an explanatory diagram showing one embodiment of the present invention. In the figure, 1 indicates a refrigeration system used in a cold storage warehouse. The refrigeration system 1 includes a compressor 2,
The condenser 3 and cooler 4 are successively connected through refrigerant piping to form a refrigeration cycle.

This condenser 3 may be an air-cooled type equipped with a condenser blower, but in the present invention, a water-cooled type is used.
A cooling circulation waterway 5 is attached to.

On the other hand, a heat exchanger 20 is installed in the middle of the cooling circulation waterway 5, a cooling tower 7, a three-way valve 8, and a cooling water circulation pump 9 are installed in sequence, and a branch is provided between the heat exchanger 6 and the cooling tower 7 to provide a valve. 8
A bypass path 5a leading to is formed.

One end of a radiator 21 using a heat pipe is arranged in the heat exchanger 20, and the other end of the radiator 21 is placed in the foundation concrete forming the ventilation layer 12 located below the concrete floor 11 of the frozen warehouse. It is installed in the pillar 14 at the upper part of the foundation footing 13 of the building frame, and in this embodiment, it is buried in the pillar 14.

In still other embodiments, the ends of the heat dissipation tubes 21 may be wound around or constantly in contact with the surface of the columns 14, or may be buried in the foundation footings 13.

A heat insulating material 16 is inserted and buried on the floor 11 between it and the finished concrete 15.

Next, to explain how to use and function, the condenser generated in the condenser 3 during operation of the refrigeration device 1 exchanges heat with water in the cooling circulation waterway 5, and the water whose temperature has increased is transferred to the heat exchanger 2.
At step 8, the heat medium (for example, fluorocarbon gas) in the heat radiation tube 21 is heated.

The water in the cooling circulation waterway 5 is further cooled in a cooling tower 7,
It reaches the condenser 3 via a valve 8 and a pump 9 and cools this condenser 3 again.

On the other hand, since the heat dissipation pipe 21 heats the column 14 by a heat pipe action, the cold temperature from the floor 11 is blocked here.

Moreover, when the water in the cooling circulation waterway 5 can be sufficiently cooled only by heat exchange in the heat exchanger 6, it is possible to use the bypass passage 5a for three days without having to pass the water through the cooling tower 7.

As mentioned above, the underfloor frost heaving prevention device for frozen warehouses of the present invention uses heated antifreeze circulation pipes or heat dissipation pipes to directly warm the concrete framework of the frozen warehouse foundation, thereby reliably preventing frost heaving phenomena in the subfloor ground. This heating is obtained by exchanging heat from the cooling circulation channel that cools the condenser of the refrigeration equipment, so the use of waste heat can save energy and improve the cooling effect of the condenser. be.

In addition, since heat pipes are used, there is no need to turn off pumps, etc., and unlike when using airflow such as warm air, there is no need for large equipment such as blowers or ducts, and only piping work is required, making construction inexpensive. It is possible.

[Brief explanation of the drawing]

The figure is an explanatory diagram showing an embodiment of the underfloor frost heaving prevention device for a frozen warehouse according to the present invention. 1... Refrigeration device, 2... Compressor, 3.
...Condenser, 4...Cooler, 5...
...Cooling circulation waterway, 5a... Bypass path, 7.
...Cooling tower, Death...Three-way valve, 9...
・Cooling water circulation pump, 11... Floor, 12...
...Ventilation layer, 13...Foundation footing, 14
...Column, 15 ... Finished concrete, 16 ... Heat insulation material, 20 ... Heat exchanger, 21 ... Use heat pipe Heat dissipation tube.

Claims (1)

[Scope of utility model registration request] A heat exchanger is installed in the middle of the cooling circulation waterway to the condenser that constitutes the refrigeration system, one end of the heat radiation tube using a heat pipe is installed in this heat exchanger, and the other end of the radiation tube is connected to the refrigerated warehouse. An underfloor frost heaving prevention device for a cold storage warehouse, characterized by being installed on the concrete foundation structure.