JPS5875681A - Cold-air circulation type freezing device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides cold air for continuously producing frozen products by supplying all cold air into an insulated tunnel in which articles to be frozen are being transported, and collecting and circulating the cold air to cool the articles to be frozen. Regarding circulation type freezing equipment, particularly effective cooling 1. ．． ::'1 This is designed to completely prevent air leakage and improve cooling efficiency.

BACKGROUND ART A cold air circulation type freezing apparatus is used as a freezing apparatus for continuously obtaining frozen products by cooling and freezing an object to be frozen to a desired low temperature in the production of frozen foods, etc.

To explain this cold air circulation type freezing device with reference to FIG. 1, there are inlets 1 at both ends. A conveying means 4 such as a conveyor belt connecting the inlet 1 and the outlet 2 is provided in the insulated tunnel 3 having an opening of the outlet 2, and the frozen goods My2 conveying means 4 are provided.
Then, the material is transferred from the entrance 1 through the insulated tunnel 3 toward the exit 2. On the other hand, in the vicinity of the exit 2 and in the vicinity of the inlet 1 in the insulating tunnel 3, an opening for sending cold air into the insulating tunnel 3 and an opening for inhaling warmed temperature using the coldness of the cold air are provided, respectively. These air supply ports 5 and intake ports 6 are connected to a blower 7 and a heat exchanger t18'i for cold air in which a refrigerant is circulated.
Connected by a conduit through -t? All air circulation pipes 10 are formed.

Then, cold air is supplied and circulated into the insulated tunnel 3 by the cold air circulation pipe 10, and the frozen product M is introduced into the insulated tunnel 3 via the inlet 1 by the conveying means 4 and is transferred toward the outlet 2. =i is cooled and discharged as a frozen product at outlet 2. Reference numeral 11 denotes a partition plate that partitions the forward and backward belt conveyor.

In the cold air circulation type freezing equipment described above, in order to provide sufficient cold heat to the frozen products, it is necessary to circulate the cold air through pipes with a corresponding cooling type, but in conventional equipment of this kind, the inlet and outlet are each equipped with an insulated tunnel. The system is open at both ends, and circulating effective cool air leaks out through the openings, or conversely, warm air from outside enters the system through the openings.
This will increase the heat load on the equipment, especially the capacity of the heat exchanger, and may cause inconveniences such as frost formation on the heat exchanger due to moisture in the air, reducing thermal efficiency. .

The present invention was made in view of the above-mentioned current situation, and
The invention provides a conveying means such as a belt conveyor that connects the inlet and the outlet in an insulated tunnel having an inlet and an outlet at both ends, and a blower that supplies and circulates cold air into the insulated tunnel. A cold air circulation type freezing device having a cold air circulation pipe comprising a heat exchanger and a heat exchanger, the inlet;
Adjacent to the outlet, a buffer chamber is provided in the insulated tunnel, which is partitioned by a partition wall so as to open at the bottom to form a flow path, and both ends of the belt conveyor are connected to the buffer chamber at least at the inlet and outlet openings. The second cold air reversing horizontal plate is disposed at the same height or lower, and is provided at the inlet and outlet openings so as to overhang the buffer chamber in the insulated tunnel and have a tip slidingly in contact with the conveying means. The invention further provides, in addition to the first invention, that the inlet and outlet openings are each located above at least the opening at the bottom of the partition wall, and
In accordance with this, the cold air circulation type freezing device is characterized in that the conveying means are arranged downwardly from the inlet and outlet openings toward the lower opening of the partition wall, thereby preventing the leakage of cold air in the conventional device. This eliminates drawbacks such as the inflow of hot air.

The present invention will be explained below with reference to FIGS. 2 and 3.

FIG. 2 shows an embodiment of the device of the present invention, in which an insulating tunnel 23 has an inlet 21 and an outlet 22 at both ends. Each partition wall z4a is adjacent to the exit 22.
, 24b opens at the bottom to form a flow path 25a:
25 bk Buffer room partitioned to form a shadow 26 al
26 bf: Separated and provided. The conveying means 27, such as a conveyor conveyor, which connects the inlet 21 and the outlet 22 has two ends 27a, 27b and a buffer 3i126! Population 21. in L*26b. Lower surface 21a of outlet 22.

22aq & MI6 Ah, h-t, ttm construction □□.

It is located. Furthermore, the buffers 1ii 26at 26b are extended to the inlet 21 and outlet 22, respectively, and the ends thereof are in sliding contact with the upper surface of the conveying means x27 such as a belt conveyor, and at least the inlet 21. A cold air reversing horizontal plate 28a and 28b, which is horizontally long and has the opening width of the outlet 22 or more, is provided. .

A blower 29 for supplying and circulating cold air into the heat insulating tunnel 23 and a heat exchanger 301i+- in which refrigerant is circulated.
The cold air circulation pipe 32 connected by the pipe 31 has openings 321 and 32b at both ends thereof as partition walls 24i and 24b, respectively.
It opens into the heat insulating tunnel 23 so as to be located on the opposite side to the opening side of the inlet 21 and the outlet 22.

Note that 33 is a partition plate that separates the forward and backward directions of the conveying means 27.

In the device of the present invention as described above, the cool air that is supplied and circulated into the heat insulating tunnel 23 by the drive of the blower 29 of the cold air circulation pipe 32 is supplied to the buffer chamber 26 in the heat insulating tunnel 23.
Since it is isolated from the outside by the buffer chambers 26a and 26b, leakage to the outside is suppressed by the buffer chambers 26a*26k).
This prevents warm air from outside from being drawn into the heat insulating tunnel 23. In addition, the buffer chamber 26tLI 26b is extended to the opening of the inlet 21#outlet 22, and a friend cold air inversion horizontal plate 28 is installed.
128 bt! , the cold air flows under the partition plate 330 that partitions the reciprocating belt conveyor of the conveying means 27 and blows up at both ends of the conveying means 27 to prevent the cold air from flowing into the opening of the effective cold pipe inlet 219 and outlet 22, and flows into the insulated tunnel 23. Direct the flow to prevent leakage to the outside. As a result, in the present invention, the buffer chamber 26a.

26b and cold air reversal horizontal plates 28a, 28b
The effective loss of cold air is approximately 0.5 to 2.0% of the amount of cold air circulated due to the installation of a Compared to the circulation amount, which was 5 to 6,591, the cold air loss in the present invention was significantly reduced.

Next, FIG. 3 shows a further modification of the freezing device of the present invention shown in FIG. 2 to further reduce the loss of effective cold air. FIG. 3 will be explained below. In FIG. 3, the same reference numerals as in FIG. 2 indicate the same structure. That is, in the freezing apparatus of the present invention shown in FIG. 3, a cooling flow path 25 & , 251) are placed higher up. A conveying means 43 such as a belt conveyor that connects the inlet 41 and the outlet 42 has both ends connected to the inlet 41 and the outlet 42.
1+ Located at the opening of the outlet 42, and from the end thereof, the lower flow passage 25a of the partition walls 24a, 24b, respectively.
Inclined part 431 descending toward the opening of 25b! L,
43b, and a horizontal portion 430 connecting the openings of the channels 25a, 25b, and 11. In addition, 44 is the said conveyance means 4311 inclined part 43&143k)
In order to bend to a more horizontal portion 43C, the conveying means 439 is, for example, a direction changing roller that is slidably positioned at both ends in the width direction of a belt conveyor.

In the cold air circulation type freezing device having the above structure, the cold air generated through the heat exchanger 30t by the drive of the blower 29 of the cold air circulation pipe 32 is supplied and circulated inside the heat insulating tunnel 33. The opening of the exit 42 is provided to separate the inside of the insulation tunnel 23 and the buffer chamber 26 & 526b, and the population is 4.
1. The opening of the outlet 42 is the partition 11241Lt 24b
Since the lower opening flow path 251L*25b is located above the insulating tunnel 23, the effective heavier cold air supplied to the insulating tunnel 23 stagnates within the insulating tunnel 23 and flows into the upper flow path 251Lp25b. Leakage is further suppressed, and entry of warmer, lighter air from the outside is quickly blocked by the partition walls 24Lt and 24b. As a result, the device shown in FIG. 3 can prevent cold air loss more effectively than the device shown in FIG.
Note that in each of the above embodiments, a cold air circulation type freezing device that circulates and supplies cold air in one direction has been described, but the present invention is limited to Fi ridges. For example, any type of freezing device that circulates cold air will produce the same effect, such as a system in which cold air is completely divided and supplied from the center of the insulated tunnel and then collected and circulated from both ends. is clear.

Since the present invention is a cold air circulation type freezing device as described above,
The leakage of effective cold air is extremely significantly suppressed, and the intrusion of warm outside air is also suppressed at the same time, so the thermal efficiency of the equipment is significantly improved, the heat load is reduced, and the total capacity of the heat exchanger can be increased without having to be designed properly. Furthermore, the improvement in thermal efficiency can reduce the total energy consumption, and the economic effect is extremely large.

[Brief explanation of the drawing]

Figure 1 is a sectional view of a conventional cold air circulation type freezing device, Figure 2 is a sectional view showing one embodiment of the device of the present invention, and Figure 3 is a sectional view of another embodiment of the device of the present invention. 21s41 is the entrance, 22m42 is the exit, 23 is the insulation tunnel, 24! L, 24bH partition wall, 25a. 25bFi flow path, 261 26bH buffer chamber, 27-43
means conveyance, 27 at 27 b, 43143
Both ends (28a, 28k) of the bFi conveying means 27, 43 are cold air reversing horizontal plates, 29 is a blower, 30 is a heat exchanger, and 32 is a cold air circulation pipe. Patent applicant Osaka Gas Co., Ltd.
Denki Kido, Representative Patent Attorney for Nippon Sanso Co., Ltd. Kido −
Hikodo Print Department 1 Tokudo Toshio Tsuruwaka Most 3 figures Patent Office @ Examiner Haruki Gishimada 1, Incident display + 1. 'fwa 56i 141 permission request no. 17238 april 2
, Name of the invention Cold air circulation freezing device; Engineering, Person making the amendment 1 Relationship with the patent applicant - = ≠ (028) Osaka Gas Co., Ltd. 5 Attachment 11 of the amendment order (1) Page 4 of the specification Correct "temperature" in line 12 to "temperature". (2) "Insulated tunnel 33" on page 12, line 6 of the same book is replaced with "
Corrected to ``Insulated Tunnel 23''. that's all

Claims (1)

[Scope of Claims] 1. A conveying means such as a belt conveyor is provided in an insulated tunnel having entrance holes at both ends, and is connected to the inlet and the outlet, and cool air is supplied into the insulated tunnel. In a cold air circulation type freezing device having a cold air circulation pipe equipped with a blower for circulating air and a heat exchanger, partitions are provided in an insulated tunnel adjacent to the inlet and the outlet, respectively.
Ic, the buffer chambers are partitioned so that a flow path opened at the bottom thereof is formed, and both ends of the conveying means are positioned at least at the same height or lower than the inlet and outlet openings of each of the buffer chambers. The cold air circulation type freezing device is characterized in that a cold air reversal horizontal sheet metal membrane is arranged so that the inlet and the outlet opening extend into each of the buffer chambers in the heat insulating tunnel, and the tip thereof slides into contact with the conveying means. 2. A conveyance means such as a belt conveyor is provided in an insulated tunnel having an entrance and an exit opening at both ends, and a conveyor such as a belt conveyor is provided to communicate the entrance and exit, and a blower and a heat exchanger are provided to supply and circulate cold air into the insulated tunnel. In a cold air circulation type freezing device equipped with a cold air circulation pipe line equipped with pipe fittings,
Adjacent to the exit, the insulated tunnel is partitioned into a buffer chamber by a partition wall that opens at the bottom to form nine channels, and the entrance and exit openings are set at least below the partition wall. The conveying means is located above the opening flow path, and further, the conveying means has both ends located in the buffer chamber at least at the same level as or lower than the inlet and outlet openings, and the conveying means has both ends located at least at the same level as or below the inlet and outlet openings of the buffer chamber. The structure is formed of an inclined part that descends toward the lower opening flow path and a horizontal part that connects the flow passage of the lower opening of the partition wall, and the inlet and outlet openings are provided with a wall extending from each buffer chamber. A cold air circulation type freezing device characterized in that a cold air reversing horizontal plate is provided so that the tip thereof slides into contact with a conveying means.