JPH0540781U - Continuous freezing device - Google Patents

Abstract

(57) [Abstract] [Purpose] The continuous freezing device of the present invention improves thermal efficiency,
The purpose is to shorten the freezing time. [Structure] A continuous freezing device characterized in that all cold air flows counter to the product.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a continuous freezing device.

[0002]

[Prior Art]

 As shown in FIG. 2, a device that conveys frozen food products by a conveyor and freezes the products during the transportation is, as shown in FIG. 2, above the belt conveyor 9 in the cooling chamber 1 which is the main body of the device, in the moving direction of the belt conveyor. In some cases, a plurality of coolers 3a and 3b are arranged at appropriate intervals.

In the coolers 3a and 3b, however, the blowing duct 6 of one of the coolers 3a is opened on the downstream side in the flow direction of the conveyor, and the cool air from the blowing duct becomes a counterflow to the flow of the conveyor and is sucked in. In the other cooler 3b, the blower duct 6 opens to the upstream side in the flow direction of the conveyor, and the suction duct 7 opens to the downstream side of the cooler 3b. The cold air in the same direction flows in the same direction as the conveyor and is sucked into the suction duct 7.

[0004]

[Problems to be solved by the device]

 The amount of heat generated from an item to be frozen is represented by the following formula.

Q = A · K · LMTD (1) Q: heat quantity kcal / H K: heat transfer coefficient kcal / M² H ° deg A: surface area of product LMTD: logarithmic mean temperature difference deg Now, if the wind speed and the product are the same, Q is determined by the difference in LMTD. The LMTD is different between the counter flow (against flow) and the parallel flow (follow flow), and the counter flow is better for increasing the LMTD. When the LMTD is large, the amount of heat taken from the product is large from the formula (1). Become.

In other words, regarding the relationship between the product and the cold air, the heat efficiency is better when the flow is opposite.

The present invention has made it possible to efficiently freeze a product by paying attention to such a point.

[0008]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the continuous freezing device of the present invention has a plurality of coolers above the horizontal conveyor moving in the cooling chamber, and the cool air blown from each cooler is used to convey the goods on the conveyor. The structure is such that each is arranged so that there is an against flow in the moving direction.

[0009]

[Action]

 In the continuous freezing device configured as described above, all the cold air from the cooler is blown against the items conveyed in the device so that they are in counterflow, so the freezing action is increased.

[0010]

【Example】

 In FIG. 2, reference numeral 1 is a cooling chamber, a plurality of air coolers 3a and 3b are arranged in an upper part thereof, and a belt conveyor 9 for conveying an item 8 is provided in a lower part thereof.

The air coolers 3a and 3b are provided at appropriate intervals in the moving direction of the conveyor. However, the blower ducts 5 and 6 of the cooler respectively open on the downstream side in the moving direction of the conveyor, and the suction duct 4 and 6 is open to the upstream side.

In this embodiment, the cool air from both the coolers 3a and 3b becomes an opposite air flow opposite to the moving direction of the article 8 conveyed by the conveyor 9 and is sucked into the suction duct.

As described above, in this device, the flow of the cold air from each cooler is a counterflow to the product, so that the LMTD of the above-mentioned formula (1) becomes large and the product can be efficiently frozen.

[0014]

[Effect of the device]

 As is clear from the above description, in the present invention, all the cold air flows counter to the product, so that the product can be efficiently frozen and the freezing time can be shortened.

[Brief description of drawings]

FIG. 1 is a diagram showing a conventional linear continuous cooling device.

FIG. 2 is a view showing an embodiment of the device according to the present invention.

[Explanation of symbols]

 1 ... Linear continuous freezing device 2a, 2b ... Fan 3a, 3b ... Air cooler 4, 7 ... Suction duct 5, 6 ... Blowing duct 8 ... Frozen object 9. ..Belt conveyors 10 ... Partition plates

Claims (1)

[Scope of utility model registration request] 1. A plurality of coolers are provided above a horizontal conveyor moving in a cooling chamber so that the cool air blown from each cooler acts as an against flow with respect to the moving direction of the goods on the conveyor. A continuous freezing device installed in each.