CN212987737U - Alternative air supply tunnel type refrigerating device - Google Patents

Abstract

The utility model discloses an air supply tunnel formula refrigerating plant in turn, the freezing tunnel and the variable speed that establish in including encircle the type conveyer belt, the downside all is equipped with cold air supply duct, air supply fan and supply-air outlet, its characterized in that on the conveyer belt in the freezing tunnel: in the air supply outlet, the upper side is an arched lower jet air supply slit, the lower side is an upper blowing and floating air supply pore plate, and the positions of the upper air inlet and the lower air inlet are staggered back and forth along the conveying direction, so that the phenomenon of air flow hedging is avoided, the upper air supply and the lower air supply are alternately realized, and the synchronous freezing is realized. The tunnel type refrigerating device with alternate air supply has the advantages of reasonable structure, high refrigerating efficiency, capability of reducing the energy consumption of equipment while ensuring the refrigerating quality of materials and wide market prospect.

Description

Alternative air supply tunnel type refrigerating device

Technical Field

The utility model relates to a refrigeration plant field, concretely relates to tunnel type refrigerating plant alternately supplies air to aquatic products quick-freeze.

Background

At present, the refrigeration equipment for aquatic products is generally divided into a cabinet type refrigeration equipment and a tunnel type refrigeration equipment, wherein the tunnel type refrigeration equipment belongs to streamlined production equipment, is suitable for the production of frozen aquatic products in large batches, and is wide in application. The tunnel type refrigerating device mainly comprises a low-temperature heat exchanger, an air duct system, a material conveying system, an electrical control system and a heat-insulating wall surface. The working mode usually depends on a fan at the top of the tunnel, cold air cooled by the heat exchanger is blown out, and the cold air and aquatic products on the conveying belt carry out heat convection, so that the aquatic products are quickly frozen.

Patent CN204648797U proposes an intelligent speed-regulating quick-freezing type tunnel conveyor belt refrigerating device, a temperature measuring device and a variable-frequency speed regulating device are arranged in the device; patent CN109405398A proposes a tunnel type double-conveyor belt instant freezer adopting forced cooling and bilateral air distribution, which uses double conveyor belts, and a centrifugal fan is arranged in the middle of the instant freezer to perform rapid cold and heat exchange with food on the conveyor belts; patent CN03823210.3C proposes an enhanced air flow tunnel freezer providing an impingement hood for the freezer that directs a jet of cryogen through an impingement plate onto the food product on a conveyor belt.

The problems that exist are: the existing tunnel type refrigerating equipment only has single-side air supply at the upper part of a conveying belt, so that the heat exchange between the upper surface and the lower surface of food is uneven, the problems of partial over-freezing and under-freezing are easy to occur, the air flow circulation utilization rate is low, the heat transfer coefficient of convection between the air flow circulation utilization rate and the food is low, and the quick-freezing effect and the food quality are influenced. In addition, the existing tunnel type refrigeration equipment is not provided with a return air duct, and cold air is directly dispersed to the environment after heat exchange with materials, so that the waste of partial cold energy is caused. In addition, the existing tunnel type refrigerating equipment can also cause the increase of energy consumption in a single air supply mode, namely high flow speed and low temperature, for ensuring the quality of aquatic products.

Disclosure of Invention

For the local super-freezing and the under-freezing problem of the material that the unilateral air supply that exists leads to among the above-mentioned prior art of solution to and the too high problem of equipment energy consumption that single air supply mode leads to, the utility model provides an air supply tunnel type refrigerating plant in turn.

The utility model adopts the technical scheme as follows:

an alternate air supply tunnel type refrigerating device comprises an internal refrigerating tunnel, wherein a speed-adjustable surrounding type conveying belt is installed in the refrigerating tunnel, a material inlet and a material outlet are respectively arranged at two ends of the conveying belt, and a temperature sensor is arranged on the conveying belt and connected with a variable cooling capacity adjusting system; the downside all is equipped with cold air supply air duct, air supply fan and supply-air outlet on the conveyer belt in the freezing tunnel, its characterized in that: in the air supply outlet, the upper side is a lower jet air supply slit, the lower side is an upper blowing and floating air supply pore plate, and the positions of the upper air inlet and the lower air inlet are staggered from front to back along the conveying direction, so that the phenomenon of air flow hedging is avoided, the upper air supply and the lower air supply are alternately performed, and the synchronous freezing is realized.

The conveying belt is a mesh belt, a mechanical vibration device is arranged between an upper belt and a lower belt of the conveying belt and is triangular prism-shaped, the mechanical vibration device is scattered at intervals of 10-20cm and distributed on the lower side of the upper belt of the conveying belt, the mechanical vibration device can continuously rotate when being started, the upper belt can continuously vibrate, the vibration frequency can be set, the opening time is long, and materials can be uniformly subjected to heat exchange while adhesion is avoided.

The upper end and the lower end of the freezing tunnel are respectively provided with an air return duct, and the air return ducts enter the front section of the heat exchanger to form closed circulation, so that the effect of reducing energy consumption is achieved.

The tunnel type refrigerating device is provided with a variable cooling capacity adjusting system, the conveyor belt is provided with a temperature sensor, and the rotating speed of the fan and the surface temperature of the heat exchanger are controlled based on the upper and lower body surface temperatures of the material, so that the air supply parameters of lower jet flow and upper blowing floating are controlled, including the air supply temperature and the flow speed, namely, the refrigerating speed is increased at the inlet section, the evaporation temperature is reduced, the rotating speed of the fan is increased, the material quickly passes through the ice crystal belt, and the quality of the material is ensured; the cold quantity required by the middle and outlet sections is reduced, the evaporation temperature can be increased, and the rotating speed of the fan is reduced, so that the waste of cold air is reduced, the energy consumption of equipment is reduced, and the quick-freezing cost is further reduced.

The utility model discloses the downside all is equipped with the supply-air outlet on the well conveyer belt, has avoided the local freezing and the under-freezing problem of material that the unilateral air supply leads to, staggers around the direction of delivery in upper and lower wind gap position, avoids the air current offset phenomenon, realizes air supply in turn from top to bottom, and is synchronous evenly freezing. And the upper end and the lower end of the freezing tunnel are respectively provided with an air return duct, and cold air enters the front section of the heat exchanger through the air return duct to form closed circulation, so that the effect of reducing energy consumption is achieved. In addition, the mechanical vibration device also avoids the problem of material adhesion on the conveying belt. The variable cooling capacity adjusting system of the utility model can control the air supply temperature and the flow speed based on the upper and lower body surface temperatures of the material, namely, the freezing speed is improved at the inlet section, the evaporation temperature is reduced, the rotating speed of the fan is increased, and the material can rapidly pass through the ice crystal belt, thereby ensuring the quality of the material; the cold quantity required by the middle and outlet sections is reduced, the evaporation temperature can be increased, and the rotating speed of the fan is reduced, so that the waste of cold air is reduced, the energy consumption of equipment is reduced, and the quick-freezing cost is further reduced. The tunnel type refrigerating device with alternate air supply has the advantages of reasonable structure, high refrigerating efficiency, capability of reducing the energy consumption of equipment while ensuring the refrigerating quality of materials and wide market prospect.

Drawings

Fig. 1 is a front half-section schematic view of an embodiment of the present invention.

Fig. 2 is a sectional view a-a of an embodiment of the present invention.

Fig. 3 is a B-B cross-sectional view of an embodiment of the present invention.

The device comprises a conveying belt 1, a material inlet 2, a material outlet 3, a temperature sensor measuring point 4, a variable cooling capacity adjusting system 5, an air supply duct 6, an upper air supply duct 6-1, a lower air supply duct 6-2, an air supply fan 7, an air supply outlet 8, an air supply jet slit 8-1, an air supply floating pore plate 8-2, a mechanical vibration device 9, an air return duct 10, an upper air return duct 10-1, a lower air return duct 10-2 and a heat exchanger 11.

Detailed Description

The invention will be further explained with reference to the following embodiments in conjunction with the accompanying drawings.

In an embodiment, as shown in fig. 1, 2 and 3, an alternative air supply tunnel type refrigerating apparatus includes a built-in refrigerating tunnel. The material enters from an inlet 2 at one end of a surrounding type conveying belt 1 with adjustable speed, and is discharged from an outlet 3 at the other end. The cold air is driven by the air supply fan 7 and flows out from the air supply outlet 8 through the air supply channels 6 on the upper side and the lower side of the conveyer belt 1 to cool the materials. In the air supply outlet 8, the upper side is provided with a lower jet air supply slit 8-1, and the lower side is provided with an upper blowing and floating air supply pore plate 8-2. The lower jet air supply slit 8-1 is positioned at the top of the center of the conveying belt and is uniformly distributed along the conveying direction, the jet air flow velocity is large, the air flow is accelerated, and the refrigeration efficiency in the freezing tunnel is obviously accelerated. The upper blowing floating air supply pore plate 8-2 is of a rectangular pore plate structure and is matched with the shape of the conveying belt 1, so that the materials on the conveying belt are uniformly cooled. The upper air supply outlet 8 and the lower air supply outlet 8 are staggered back and forth along the conveying direction, so that air is supplied alternately from top to bottom under the driving of the air supply fan 7, the phenomenon of air flow hedging is avoided, the air is synchronously frozen, and the heat exchange effect is effectively improved.

In the embodiment, as shown in fig. 1, the conveyor belt 1 is a speed-adjustable conveyor belt, a mechanical vibration device 9 is installed between the upper belt and the lower belt of the conveyor belt 1, is triangular prism-shaped, and is scattered and distributed on the upper side and the lower side of the conveyor belt 1 at intervals of 10-20cm, and can continuously rotate when being started, so that the upper belt is continuously vibrated, the problem of adhesion among materials is avoided, the effect of heat exchange enhancement is achieved, and the vibration frequency and the starting duration can be artificially set.

In the embodiment, as shown in fig. 2 and 3, the freezing tunnel is provided with an air return duct 8, which includes an upper air return duct 10-1 and a lower air return duct 10-2, air enters the front section of the heat exchanger 11 through the air return duct 10, and is cooled by the heat exchanger and then is sent into the freezing tunnel through the air supply opening 8, so that closed circulation of air flow is formed, and the effect of reducing energy consumption is achieved. It is worth noting that the air supply outlets 8 are staggered back and forth along the conveying direction, so that the lower jet flow and the upper blowing float form two anticlockwise annular flow fields respectively, and the interference between air flows is avoided.

In the embodiment, as shown in fig. 1, the alternate air supply tunnel type refrigerating device is provided with a variable cooling capacity adjusting system 5, namely a plurality of temperature sensor measuring points 4 are arranged on the conveyor belt 1, and the rotating speed of a fan and the surface temperature of a heat exchanger which are close to each other are controlled based on the upper and lower body surface temperatures of a material, so that air supply parameters of lower jet flow and upper blowing are controlled, namely the refrigerating speed is increased at an inlet section, the evaporation temperature is reduced, the rotating speed of the fan is increased, the material rapidly passes through an ice crystal belt, and the quality of the material is ensured; the cold quantity required by the middle and outlet sections is reduced, the evaporation temperature can be increased, and the rotating speed of the fan is reduced, so that the waste of cold air is reduced, the energy consumption of equipment is reduced, and the quick-freezing cost is further reduced.

Claims (5)

1. The utility model provides an air supply tunnel type refrigerating plant in turn, includes the freezing tunnel of establishing, install speed adjustable in the freezing tunnel and encircle type conveyer belt (1), its characterized in that: two ends of the conveying belt (1) are respectively provided with a material inlet (2) and a material outlet (3), and the conveying belt is provided with a temperature sensor (4) connected with a cooling capacity adjusting system (5); the upper side and the lower side of the conveying belt in the freezing tunnel are respectively provided with a cold air supply duct (6), an air supply fan (7) and an air supply outlet (8), the upper side of the air supply outlet (8) is a lower jet air supply slit (8-1), the lower side of the air supply outlet is an upper blowing and floating air supply pore plate (8-2), and meanwhile, the positions of an upper air inlet and a lower air inlet are staggered from front to back along the conveying direction, so that the air flow hedging phenomenon is avoided, the upper air supply and the lower air supply are alternately.

2. The alternate air supply tunnel freezer of claim 1, wherein: the conveying belt (1) is a mesh belt, and a mechanical vibration device (9) is arranged between an upper belt and a lower belt of the conveying belt (1).

3. The alternate air supply tunnel freezer of claim 2, wherein: the mechanical vibration device (9) is triangular prism-shaped, is scattered and distributed at the lower side of the upper belt of the conveying belt (1) at intervals ranging from 10 cm to 20cm, can continuously rotate when being started, enables the upper belt to vibrate continuously, turns over the frozen object evenly, and prevents the frozen object from being frozen and stuck with the conveying belt.

4. The alternate air supply tunnel freezer of claim 1, wherein: and air return ducts (10) are respectively arranged at the upper end and the lower end of the freezing tunnel, and enter the front section of the heat exchanger (11) through the air return ducts (10) to form closed airflow circulation.

5. The alternate air supply tunnel freezer of claim 1, wherein: the variable cooling capacity adjusting system (5) is connected with the temperature sensor (4) on the conveying belt (1), and can control the air supply flow rate and temperature of lower jet flow and upper blowing floating based on the upper and lower body surface temperatures of materials, the rotating speed of the air supply fan (7) and the evaporation temperature of the heat exchanger (11).

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