JPH087331Y2 - Continuous freezing device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a continuous freezing device.

[0002]

2. Description of the Related Art In a conventional continuous freezing device using a conveyor, a plurality of coolers are arranged at equal intervals in the longitudinal direction of the conveyor.

[0003]

The heat load caused by the goods is not constant in the moving direction of the conveyor, and a large heat load is generated on the inlet side of the cooling chamber and is small on the outlet side. This will be described in more detail as follows.

(A) Cooling chamber inlet: The temperature difference between the product and air is large, and the amount of heat generated by the product is large.

(B) Intermediate part: In the process where the product freezes from the surface to the inside, the heat of the product is hard to reach the surface, and the amount of heat generated from the product is not large.

(C) Same outlet section: This is a process section where the product goes from the freezing point to supercooling, the amount of heat of the product itself is small, the difference between the product temperature and the air temperature is small, and heat is generated. The quantity is small.

As described above, the heat load is large near the inlet of the cooler, and the heat load is light near the outlet of the cooling chamber. However, in the conventional cooling and refrigerating apparatus, the coolers are arranged at equal intervals in the flow direction of the conveyor without considering the change of the heat load. Therefore, it takes time to bring the product down to the set temperature.

According to the present invention, a plurality of coolers are arranged in the flow direction of the conveyor. The coolers have a small arrangement interval between the coolers in the vicinity of the inlet of the cooling chamber, and in the middle of the cooler. The intervals between the coolers are larger than that at the inlet,
At the outlet, the final cooler can be efficiently supercooled.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The method of the present invention will be described below with reference to the embodiments shown in the drawings.

In FIGS. 1 and 2, reference numeral 1 is a chamber body which is a main body of the apparatus, and is divided into two upper and lower spaces A and B by a horizontal partition plate 4, and a plurality of coolers, 4 in the figure, are provided in the upper space A.
The coolers 2a, 2b, 2c and 2d of the stand are provided.

Further, a horizontal endless conveyor 5 is provided in the lower space B which is a cooling chamber, and this conveyor passes through the lower space B from a front chamber (not shown) and then reverses in a rear chamber (not shown). After passing through the inside of B, it returns to the anterior chamber, is inverted here, and moves again as described above.

Although the partition plate 4 is provided with a large number of air outlet slits 3 for blowing cold air to the conveyor, these slits are provided at appropriate intervals in the same direction as the moving direction of the conveyor. It's open.

Therefore, a strong wind zone and a weak wind zone of cold air are alternately formed below the partition plate 4 in the flow direction of the conveyor.

That is, a strong wind zone is formed below the slits, and a weak wind zone is formed below the blind plate portion between the slits.

The strong wind zone and the weak wind zone can be formed by appropriately setting the opening area and shape of the slit.

In this apparatus, the coolers 2a, 2b, 2
c and 2d are not arranged at equal intervals in the flow direction of the conveyor, but the intervals between the coolers 2a and 2b are made small near the inlet part in the cooler, and the intervals between the coolers 2b and 2c are made in the middle part of the cooling chamber. The end cooler 2d is arranged so as to be larger than that at the inlet, and the end cooler 2d is arranged near the outlet in the cooling chamber.

That is, the coolers 2a, 2b, 2c, 2d
Is arranged with the intervals of the respective coolers set so that the cooling capacity is balanced with the temperature change and enthalpy of the product 6 conveyed on the conveyor while being cooled.

In this embodiment, the coolers 2a, 2b,
Since 2c and 2d are arranged at the intervals described above, the product 6 for frozen food or the like conveyed by the conveyor is naturally cooled so as to correspond to the enthalpy of FIG. 4 and the temperature change shown in FIG. 3 during the cooling process. , Cooling is performed effectively.

[0019]

According to the device of the present invention, since the goods conveyed by the conveyor are cooled in consideration of the enthalpy of the goods in the conveying and cooling process, it is effective without any loss of quality and quality. To be cooled.

Further, since the surface of the product is frozen in the first part of the cooling process, water evaporation of the product in the subsequent process is prevented as much as possible, the product is hardly dried, and the product is frozen with good freshness. It can produce foods.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing an example of the present device.

FIG. 2 is a cross-sectional view of the same.

FIG. 3 is a diagram showing a relationship between time and temperature change.

FIG. 4 is a diagram showing a relationship between time and enthalpy of goods.

[Explanation of symbols]

 1 ... Device main body 2a-2d ... Cooler 3 ... Slit 4 ... Partition plate 5 ... Conveyor 6 ... Item

Claims (1)

[Scope of utility model registration request] 1. A plurality of cooling units are arranged above the conveyor passing through the cooling chamber by making the arrangement interval small near the inlet of the cooling chamber and by making the interval larger than the arrangement near the inlet in the middle of the cooling chamber. A continuous freezing device provided with an end cooler for supercooling near the outlet of the cooling chamber.