JP2019002597A - Food product freezing device and food product freezing method - Google Patents

Abstract

To provide a freezing device which reduces a freezing load by contriving an arrangement of a motor with a constituent element of an air-sending fan, and rectifies a cold air flow so as to prevent a turbulent flow in a chamber.SOLUTION: The present invention includes: a cooler 120; an air-sending fan 130; a transport system 140 in which a transport belt moves along an endless track; and an injection slit array 150 in which a plurality of injection slits 151 that open toward an upper surface of the transport system 140 is aligned. In an injection nozzle unit array 160, an injection nozzle unit 161 that opens downward toward a lower surface of the transport system 140 and a cold air flow collecting slit 162 for guiding a cold air flow downward are aligned alternately. As a macro cold air flow, the cold air flow injected from the injection slit 151 and the injection nozzle unit 161 is collected via the cold air flow collecting slit 162. A motor that serves as a heat source of the air-sending fan is provided outside of a chamber so as to reduce a freezing load.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a food freezing apparatus that can rapidly freeze food by continuously using a belt conveyor as a conveying means and applying a cold airflow.

A refrigerant-type refrigeration apparatus is widely used as an apparatus for rapidly cooling food. There are a so-called batch refrigeration apparatus and a continuous refrigeration apparatus as processing methods for these apparatuses.
The batch-type refrigeration apparatus collects target foods and the like into a group, cools them together in a cooling chamber, removes them when the cooling process is completed, and cools the next group of target foods. There are various types of batch refrigeration apparatuses depending on the cooling method, such as a cold air flow method, a brine method, and a liquid gas vaporization method.
The continuous refrigeration apparatus performs rapid freezing of food by placing food on a belt conveyor and continuously passing through the refrigeration apparatus. There are various types of cooling methods for the continuous refrigeration system depending on the cooling method, such as a cold air flow method, a brine method, and a liquid gas vaporization method.

There are various cooling methods as follows.
In the cold air flow method, air that serves as a refrigerant is blown or sucked to pass through the cooler, cool air is generated, a cooling space that guides the cool air is provided, and the conveyor system of the belt conveyor is passed through the cooling space. Install and circulate. In this method, food to be frozen is placed on a belt conveyor, and the food to be frozen is passed through a cooling space to rapidly freeze.

  In the brine method, a cooler is placed around the tank that stores the brine solution (calcium chloride solution, alcohol aqueous solution, etc.) to maintain the brine solution at a predetermined low temperature, and the object to be cooled is immersed in the brine solution. To cool. In the case of adopting the continuous processing method, there is one in which a part of the conveyor system of the belt conveyor is assembled so as to pass through the brine solution and immersed in the brine solution together with the conveyor system. Since the food to be frozen is immersed in the brine solution, the cooling quality is relatively good because the refrigerant uniformly covers the surroundings, and the heat exchange is also performed between the brine solution and the freezing rate is fast. This method is also suitable for quick freezing.

  In the liquid gas vaporization method, a low temperature liquid gas such as liquefied nitrogen or liquefied oxygen is directly sprayed on the food to be cooled, and the food to be frozen is rapidly used by using latent heat of evaporation and sensible heat generated when the liquid gas evaporates. It is a method of freezing.

FIG. 14 is a diagram illustrating a configuration example of an apparatus that employs a cold airflow method in a batch refrigeration apparatus in the related art.
As shown in FIG. 14, the batch refrigeration apparatus 10 includes a cooler 11 that constitutes a refrigeration cycle by circulating a refrigerant and a cooling chamber 12 having a sealed structure. The cooling chamber 12 includes a door 14 for taking in and out an object to be cooled, and a plurality of display shelves 16 facing the door 14 are provided in multiple stages in the vertical direction at intervals. The cold airflow cooled by the refrigeration cycle of the cooler 11 is guided to the cooling chamber 12 and is recovered from the cooling chamber 12 while cooling the object to be cooled f placed on the display shelf 16, and is sent to the cooler 11. It is captured. The partition wall of the cooling chamber 12 has a sealed and heat insulating structure constituted by a heat insulating panel 13.

The cooling fan 12 is provided with a blower fan 17 and a rectifier (not shown). In the cooling chamber 12, an air flow that flows in the direction of arrow a is formed by the blower fan 17. The cooled cold airflow is rectified by the rectifier 18 and flows toward the object to be cooled f placed on the display shelf 16 to freeze the object to be cooled f. In addition, a gap is formed in the display shelf 16 so that the cold airflow can flow downward through the gap.
When the object to be cooled f is frozen, the door 14 is opened and replaced with the next object to be cooled f. In this way, the cooling process is performed collectively for each group, so it is called a batch process type.

FIG. 15 is a diagram illustrating a configuration example of an apparatus adopting a cold air flow method in a continuous refrigeration apparatus in the related art.
As shown in FIG. 15, the components of the continuous refrigeration apparatus 20 include a cooling chamber 21 in which a partition wall is formed of a heat insulating panel and having heat insulating properties and airtightness, and a belt conveyor 22 that is disposed through the cooling chamber 21. A cooling air flow outlet 24 which is a hollow casing that faces the conveying surface of the belt conveyor 22 inside the cooling chamber 21 and through which cold air passes. Is provided. A number of slit nozzles 26 a that open toward the conveying surface of the belt conveyor 22 are disposed in the cold air blowing part 24. The openings of the slit nozzles 26a are arranged at right angles to the moving direction of the belt conveyor 22, and are arranged in parallel at a predetermined interval with respect to the moving direction of the belt conveyor 22. A blower fan 25 is provided above the interior of the cooling chamber 21.

  In the continuous refrigeration apparatus 20, one end of the conveyor 22 is outside the cooling chamber 21, an object to be cooled is placed at one end of the conveyor 22, and the conveyance system of the conveyor 22 is led into the cooling chamber 21. The object to be cooled is carried along with the conveyor 22. In the cooling chamber 21, a cold air current is blown toward the conveying surface of the conveyor 22, and the object to be cooled is cooled by this cold air flow. The frozen object to be cooled is conveyed outside the cooling chamber 21 while being placed on the conveyor 22. The other end of the conveyor is provided outside the cooling chamber 21 and an object to be cooled is taken out. The take-out operation of taking out the entire shelf like a batch type can be omitted. In this way, the object to be cooled can be carried in and out continuously, which is called a continuous refrigeration apparatus. The continuous refrigeration apparatus has an advantage that the processing time as a whole can be shortened.

JP 2011-47553 A

As described above, there are various cooling methods, each of which has advantages.
In the present invention, a cold air flow method is adopted as a cooling method.
In the present invention, other cooling methods are not employed because of the following problems.
First, since the brine method uses a brine solution, it can be said that the brine method is suitable for a case where an object to be cooled is cooled and frozen. However, it is unsuitable for the object to be cooled exposed, and a brine solution such as calcium chloride or alcohol penetrates into the food. Therefore, the brine system cannot be adopted if the object to be cooled is not enclosed in the package.

Next, the liquid gas vaporization method is a method suitable for quick freezing the surface to which the liquid gas adheres because the low temperature liquid gas such as liquefied nitrogen or liquefied oxygen is directly sprayed on the food to be cooled. However, the liquid gas adheres only to the surface of the object to be cooled, and the liquid gas does not penetrate inside the object to be cooled. Therefore, it cannot be said that the method is suitable for freezing thick foods. In addition, it is difficult to build a refrigeration cycle in which the liquid gas is vaporized and then recovered and liquefied again, and the liquid gas is consumed, which increases the cost.
Therefore, the present invention employs a cold airflow method that can cope with uncovered foods or thick foods that are not enclosed in a package. In the cold airflow type refrigeration apparatus, air serving as a refrigerant is blown or sucked and circulated in the freezer, so that the food may be exposed, and the refrigeration cycle is easy to assemble, so the cost is relatively reasonable.

Next, as a refrigeration apparatus adopting a cold air flow method, there are a batch processing type refrigeration apparatus and a continuous processing type refrigeration apparatus. In the present invention, a continuous processing type refrigeration apparatus is used.
The batch-type refrigeration system has the convenience of being able to cool the objects to be cooled in a batch, but the work to arrange the objects to be cooled by shelves, the work to carry the shelves to the freezer, the work to wait for the cooling time, There is an operation of carrying out the entire shelf and an operation of taking out the object to be cooled from the shelf, and since the object to be cooled cannot be frozen without passing through them, the batch refrigeration apparatus has a problem that it takes a processing time as a whole.
Therefore, the refrigeration apparatus of the present invention is a continuous processing refrigeration apparatus.

There is a problem to be solved in the apparatus adopting the continuous cold air flow method shown in FIG. 15 in the prior art.
The first problem is that the blower fan is provided as an essential component, but the motor becomes a heat source, causing a temperature increase in the freezer and reducing the cooling efficiency.
The second problem is the homogenization of the cold air flow introduced over the continuous processing type conveying system. Depending on the design specifications, the continuous processing transport system can range from a few meters to a few dozen meters. In the meantime, foodstuffs etc. contact cold airflow, but in order to improve freezing quality, the cold airflow needs to be led uniformly. If the temperature and the wind speed of the cold air flow are sparse, the cooling of the food during cooling may be uneven and the refrigeration results may vary.
In the cold airflow, the cold air generated by the cooler circulates in the cabinet through the blower fan, and in the process, the cold airflow comes into contact with an object to be cooled such as a food material flowing through the transport system. Therefore, it becomes a problem how the speed of the cold air flow mainly by the blower fan is homogenized and led to the cooling object. Since only 2 to 4 relatively large fans can be arranged, it is questioned how the strongly generated air is diffused and homogenized, but the conventional fan as shown in FIG. Since the blown air directly hits the object to be cooled, there is a problem that it is not homogenized.

  The third problem is improvement of cooling quality from below. While the object to be cooled, such as food, is transported through the transport system, the cooling of the object to be cooled, such as food, is delayed only by the cold airflow from above, and there is a risk that the upper and lower refrigeration quality will vary. Therefore, it is necessary to cool from below.

  The fourth problem is the problem of rectifying the cold airflow. When a cold airflow that hits the object to be cooled, such as food, from below is introduced to a cold airflow that is applied above the object to be cooled, such as food, via a blower fan, cooling from above is performed around the transport system. There is a possibility that turbulent flow may occur due to turbulence of airflow and cold airflow from below. It is necessary to make the flow of the cold air flow in the macro one-way and rectify the cold air flow in the macro.

  In view of the above problems, an object of the present invention is to reduce the refrigeration load by devising the arrangement of a motor serving as a heat source among the components of the blower fan. In addition, it is possible to guide the cold air flow blown through the blower fan to the object to be cooled such as food without reducing the speed, and to apply the air speed to the object to be cooled by homogenizing the wind speed so as not to cause variation. An object is to provide a rectifying structure. Furthermore, an object of the present invention is to provide a structure capable of guiding a cold air flow from below to a cooling object and cooling the cooling object from both above and below. It is another object of the present invention to provide a structure that rectifies a cold airflow that hits from above and a cold airflow that hits from below to flow in one direction in a macro so that turbulence does not occur in the cabinet.

In order to achieve the above object, the refrigeration apparatus of the present invention is provided with a freezer, a cooler that supplies cold air to the freezer, and the cold air cooled by the cooler is sucked or blown into the freezer. A refrigeration apparatus comprising a blower fan, wherein the motor of the blower fan is provided outside the freezer, and a bearing is connected from the motor to a rotating shaft of the blower fan.
With the above configuration, a motor serving as a heat source is provided outside the refrigerator, so that the refrigeration load can be reduced.

In order to make the continuous processing type freezer using the above advantages, in addition to the above configuration, the transport belt rotates along an endless track, and a part of the endless track passes through the freezer. A large number of ejection slits opened toward the upper surface of the conveyance system and the conveyance system are arranged, receive the air blown from the blower fan to the upper surface of the conveyance system, and enter the upper surface of the conveyance system through the ejection slit. An injection slit array for injecting a rectified cold airflow, an injection nozzle unit opening toward the lower surface of the transport system, and a number of cold airflow recovery slits for guiding the cold airflow downward from the gap between the injection nozzle units The cooling air flow is jetted from the blower fan to the jet nozzle unit toward the lower surface of the transport belt, and the cooling air flow as a macro cold air flow is provided. A spray nozzle unit array that guides the cold airflow downward through a flow recovery slit, and the cold airflow ejected downward from the jet slit array is guided to the upper surface of the transport belt of the transport system, from the spray nozzle unit array A refrigeration apparatus, characterized in that a cold air current ejected upward is guided to a lower surface of a transport belt of the transport system, and the cold air subjected to a refrigeration process is circulated from the cold air flow recovery slit to the cooler. is there.
With the above configuration, the object to be frozen can be frozen by applying a cold airflow from above and below, so that the freezing speed can be improved, and the cold airflow collected near the transport system is rectified and passed through the cold airflow recovery slit. As a result of the structure that guides the cold airflow downward, the flow of the macro cold airflow can be rectified, and collision of the cold airflow from above and the cold airflow from below will not cause excessive turbulence, resulting in refrigeration unevenness, etc. The freezing quality is improved.

In the spray nozzle unit array having the above configuration, it is preferable that the spray nozzle units and the cold air flow collecting slits are alternately arranged.
With the above configuration, since the cold air flow is drawn downward through the cold air flow collecting slits that are alternately arranged with the injection nozzle unit and formed at appropriate intervals, the cold air flow gathered near the conveyance system is smoothly lowered. It becomes easy to rectify the macro flow.
In addition, about the conveyance belt | band | zone of a conveyance system, the thing which cannot pass a cold airflow may be used, and the thing which can pass is sufficient.
For example, a steel belt that cannot pass a cold airflow can be used as a transport belt of the transport system. In the case of a steel belt, the cold airflow that has reached the transport zone from above is detoured from the surface of the transport zone in the side direction and passes downward, and is guided to the cool airflow recovery slit below. Further, for example, a metal mesh belt or a metal net belt that can pass a cold airflow can be adopted as a transport band of the transport system. In this case, since the cold airflow can pass up and down the transport zone, the cold airflow passes up and down the transport zone as it is, so that the turbulence of the cold airflow can be further suppressed.

Next, a device for the relationship between the pitch of the ejection slit array in the ejection slit array and the pitch of the ejection nozzle unit array in the ejection nozzle unit array will be described.
For example, the pitch of the arrangement of the ejection slits in the ejection slit array can be substantially equal to the pitch of the arrangement of the ejection nozzle units in the ejection nozzle unit array.
With the above configuration, the arrangement of cold airflows injected from above to the vicinity of the conveyance system is substantially equal to the arrangement of cold airflows injected from below to the vicinity of the conveyance system, and the cold airflow is uniformly applied to the object to be frozen. be able to.

In addition, the pitch of the array of spray slits in the spray slit array can be substantially equal to the pitch of the array of cold air flow recovery slits in the spray nozzle unit array.
With the above configuration, the arrangement pitch of the cold air flow injected from the upper injection slit and the arrangement pitch of the cold air collection slit for guiding the cold air flow downward correspond to each other. become.

Next, a device for the relationship between the arrangement position of the ejection slits in the ejection slit array and the arrangement position of the ejection nozzle units in the ejection nozzle unit array will be described.
In particular, when the transport belt of the transport system is a metal mesh belt or a metal net belt, it is preferable to devise them because their arrangement positions can be given to the rectification of the cold airflow.
For example, the arrangement position of the ejection slits in the ejection slit array can be set to face the arrangement position of the ejection nozzle units in the ejection nozzle unit array.
With the above configuration, the flow of the cold air flow injected from above to the vicinity of the conveyance system and the flow of the cold air flow injected from below to the vicinity of the conveyance system face each other, and the cold air flow is uniformly applied to the object to be frozen. be able to.

Moreover, it can also be set as the relationship which the arrangement position of the injection slit in an injection slit array opposes the arrangement position of the said cold airflow collection | recovery slit in an injection nozzle unit array.
With the above configuration, the arrangement position of the cold airflow ejected from the upper ejection slit and the arrangement position of the cold airflow recovery slit that guides the cold airflow correspond to each other, so that the recovery of the cold airflow can be smoothly rectified. .

Next, the blowing direction of the blower fan and the conveying direction of the conveying system will be described.
In the above configuration, the air blowing fan is disposed substantially in parallel with the conveying direction of the conveying system, and a wind direction adjusting body is added to bend the air direction so that the cold air blown by the air blowing fan faces the jet slit array. A configuration is preferable.
With the above configuration, if the blower fan is disposed substantially parallel to the transport direction of the transport system, the overall height of the apparatus can be reduced and downsized. In this configuration, since the cold air flow blown by the blower fan flows almost in parallel with the transport system, it is difficult to reach the surface of the transport system.Therefore, a wind direction adjusting body that bends the wind direction is added, and the flow of the cold air flow is substantially reduced to the transport system. The wind direction is set so as to face the transport system from a parallel object. In addition, it is preferable that a wind direction adjustment body is a structure which changes a wind direction so that the momentum of a cold airflow may become equal. For example, there is one in which a concentric cylindrical body is cut along the axial direction to form a column whose outer periphery is a quarter arc, and the axis thereof is arranged to be orthogonal to the blowing direction of the blower fan. In other words, if the wind direction adjusting body is used, the cold air flow blown from the blower fan enters the air direction adjusting body in parallel with the conveyance system, and the cold air current curves downward along the arc wall surface of the wind direction adjusting body. Then, it is injected so as to face the transport system.

  Next, in the above configuration, it is preferable to have a configuration including a height adjusting mechanism for adjusting the height of the ejection slit array. The distance between the slit and the upper surface of the transport system can be adjusted, and the freezing speed and the like can be easily adjusted.

  Next, the structure of the ejection slit array will be described. As an example of the structure of the jet slit array, the slit body forming each slit is a mountain-shaped taper body having a convex upper surface and a side wall having a vertical wall surface. There is a structure in which a slit is formed by a gap between wall surfaces.

  With the above configuration, the slit has a three-dimensional depth, and the jet direction of the cold air flow guided downward is easily controlled and easily rectified. In addition, if the mountain-shaped taper body has an independent structure, it is not necessary to remove the entire ejection slit array when you want to access the transport system for maintenance, etc., just remove the mountain-shaped taper body at the corresponding location. It is possible to access the surface of the transfer system at the relevant location.

According to the refrigeration apparatus according to the present invention, the object to be frozen can be frozen by applying a cold airflow from both above and below, so that the refrigeration speed is improved and the cold airflow collected near the conveyance system is rectified. Since it is a structure that guides the cold air flow downward through the cold air recovery slit, the flow of the macro cold air can be rectified, and excessive turbulence can be caused by the collision of the cold air flow from above and the cold air flow from below As a result, there is no freezing unevenness and the freezing quality is improved.
Further, according to the refrigeration apparatus according to the present invention, the cold air current is drawn downward through the cold air current collecting slits that are alternately arranged with the injection nozzle unit and are formed at appropriate intervals. The cold airflow gathered in the air is smoothly guided downward, making it easier to rectify the macro flow.

It is the figure which showed the structural example of the freezing apparatus 100 concerning Example 1 simply. It is a figure which shows the structural example of the wind direction adjustment body 180. FIG. It is the figure which showed simply the conveyance belt | band 141 comprised with the mesh conveyor. FIG. 3 is a view showing a cross section of an ejection slit 151 and an ejection slit body 152 constituting the ejection slit array 150. It is a figure which shows a mode that the height of the ejection slit array 150 is adjusted. It is the figure which showed the structure of the injection nozzle unit array 160 in the cross section. It is the figure which showed the flow of the macro cold airflow in the freezer 110 clearly. It is a figure explaining the relationship between the pitch of the arrangement | sequence of the ejection slit 151, and the pitch of the arrangement | sequence of the nozzle unit 161 (the 1). It is a figure explaining the relationship between the pitch of the arrangement | sequence of the ejection slit 151, and the pitch of the arrangement | sequence of the nozzle unit 161 (the 2). 6 is a diagram showing a refrigeration apparatus 100a that is a first configuration example of Embodiment 2. FIG. 6 is a diagram illustrating a refrigeration apparatus 100b that is a second configuration example of Embodiment 2. FIG. It is a figure which shows the flow of the cold airflow in the conveyance belt | band | zone 141c vicinity when the conveyance belt | band 141c of the conveyance system 140c of Example 3 does not have air permeability in an up-down direction. It is the figure which showed the flow of the cold airflow in the case where the conveyance belt | band 141c of the conveyance system 140c of Example 3 does not have air permeability in the up-down direction by the macro. It is a figure which shows the structural example of the apparatus which employ | adopted the cold airflow system with the batch type freezing apparatus in a prior art. It is a figure which shows the structural example of the apparatus which employ | adopted the cold airflow system with the continuous refrigeration apparatus in a prior art.

  Examples of the refrigeration apparatus of the present invention will be described below. The present invention is not limited to these examples.

Hereinafter, a configuration example of a refrigeration apparatus according to the present invention will be described with reference to the drawings.
FIG. 1 is a diagram simply illustrating a configuration example of the refrigeration apparatus 100 according to the first embodiment.
The refrigeration apparatus 100 includes a freezer 110, a cooler 120, a blower fan 130, a transport system 140, an injection slit array 150, an injection nozzle unit array 160, a cold air flow recovery path 170, and a wind direction adjuster 180. It has become. The air direction adjusting body 180 is an option, and is provided to adjust the blowing direction unless the arrangement position and the arrangement direction of the blower fan 130 are opposed to the transport system 140 as will be described later. As long as the position and direction of the blower fan 130 are opposed to the transport system 140, the wind direction adjusting body 180 may not be provided.
Further, the cold air flow collecting path 170 may be a route through which the cold air flow collected through the cold air flow collecting slit 162 of the injection nozzle unit array 160 is collected by the cooler 120. The description is omitted as appropriate.
Further, other components provided as a refrigeration apparatus, such as a pan that receives frost, water droplets, and the like below the transport system 140, are not shown here.
Hereinafter, each component will be described.

The freezer 110 is a highly heat-insulating box and is designed with an emphasis on hermeticity. The transport system 130 is disposed so as to penetrate the freezer 110, and a transport inlet of the transport system 130 and a transport outlet of the transport system 130 are provided to carry in or carry out the food to be frozen from the outside. It has a structure that can be done. It is also possible to provide a door on the side for use during maintenance.
In this example, in the freezer 110, a cooler 120, a blower fan 130, a transport system 140 (the end portion is located outside the refrigerator), an injection slit array 150, an injection nozzle unit array 160, a cold air flow recovery path 170, and air direction adjustment. A body 180 is attached.

The cooler 120 is not particularly limited as long as it is a device that generates cold air. When used in a commercial freezer, the required cooling capacity is required. For example, the ability to generate cold air of about −20 degrees to −40 degrees is required.
Although the detailed illustration of the cooler 120 is omitted, the cooler 120 includes a housing, a plurality of heat exchange metal fins, and a refrigerant pipe. In FIG. 1, the entire cooler 120 is simply illustrated.
The configuration of the cooler 120 is not particularly limited with respect to the configuration other than the above configuration, and may include a configuration provided in a general cooling mechanism. The illustration of the flow of the refrigerant is also omitted, and the illustration of the compressor placed outside the freezer and the pipe for moving the refrigerant between the cooler and the compressor is also omitted.

Although the arrangement position of the cooler 120 is not limited, in the present invention, cold air is sprayed from above and below evenly on the object to be frozen conveyed by the conveyance system 140. For example, the arrangement position of the cooler 120 is Is preferably attached so as to be located near the outside of the ejection slit array 150 and the ejection nozzle unit array 160.
A configuration in which the cooler 120 is provided not on the ceiling but on the side wall surface or the rear wall surface is also possible.

The casing of the cooler 120 is a frame that forms the outer shape of the cooler 120. In this configuration example, air permeability is ensured in order to draw out the cold air generated by the internal heat exchange fins. The surface which does not affect air permeability may be configured to be covered with a heat insulating material or the like so that frost is hardly formed.
A plurality of heat exchange metal fins are arranged at a predetermined interval, and the refrigerant pipe penetrates through the heat exchange metal fins. The material is a metal with good thermal conductivity, and for example, an aluminum alloy is used. The reason for the plate shape is to increase the surface area in order to increase the heat exchange efficiency.
The refrigerant pipe is a pipe penetrating each heat exchange metal fin, and the refrigerant circulates inside. Since the principle of cooling using a refrigerant is a generally known principle, a description thereof is omitted here.

  When the cooler 120 having the above-described configuration is operated, heat exchange occurs between the air in the cooling chamber that has convected into the space between the heat exchange metal fins and the heat exchange metal fins, and the heat exchange metal fins and Heat exchange occurs between the refrigerant pipes and air passing through the cooler 120 in the vertical direction is cooled.

The description of other configurations will be continued.
The blower fan 130 blows air so as to draw cold air from the cooler 120.
There are various arrangements of the blower fans 130.
For example, there exists arrangement | positioning which makes the ventilation direction of the ventilation fan 130, and the conveyance direction of the conveyance system 140 substantially parallel. That is, it is a pattern in which the blowing direction of the blower fan 130 is horizontal, bent downward by a wind direction adjusting body 180 described later, and sprayed toward the transport band of the transport system 140 below. There are a plurality of patterns in the arrangement in which the blowing direction of the blower fan 130 and the conveyance direction of the conveyance system 140 are substantially parallel. For example, the cooler 120 is attached to the back side (outside) and the blower fan 130 is attached to the center side. There is an arrangement in which cold air drawn from the cooler 120 on the back side is injected into the center side. In addition, for example, there is an arrangement in which a blower fan 130 is attached to the back side of the cooler 120 so that the cool air of the cooler 120 is blown out toward the refrigeration space where the jet slit array 150 and the jet nozzle unit array 160 are located. Furthermore, the arrangement of FIG. 1 is the former arrangement, in which cold air drawn from the cooler 120 on the back side is blown into the central side by the blower fan 130.

The blower fan 130 has various elements such as a wing, a rotating shaft, a bearing, and a motor, but illustration thereof is omitted here. In the example of FIG. 1, all elements are installed in the freezer 110. The number and mounting height of the blower fans 130 may be designed so that the air flow blown from the blower fan 130 can easily draw cold air from the cooler 120 and has a blower capacity that matches the required cooling capacity. preferable.
As another arrangement example of the blower fan 130, for example, there is an arrangement in which the blowing direction of the blower fan 130 and the conveyance direction of the conveyance system 140 are substantially orthogonal. That is, it is a pattern in which the air blowing direction of the blower fan 130 is downward and the air is blown toward the conveyance band of the conveyance system 140 below. The motor 134 can be taken out of the freezer 110. Since the arrangement in which the blowing direction of the blower fan 130 and the conveying direction of the conveying system 140 are substantially orthogonal will be described later in detail with reference to FIGS. 10 and 11 in the second embodiment, the description thereof is omitted here.

The air direction adjusting body 180 is not an essential member, but when the air blowing direction of the blower fan 130 is not the direction facing the surface of the jet slit array 150 or the transport system 140, the air direction from the blower fan 130 is changed to the jet slit array 150 or It bends in a direction facing the surface of the transport system 140. In the configuration example of FIG. 1, the wind direction adjusting body 180 is applied.
In the configuration example of FIG. 1, the blowing direction of the blower fan 130 is substantially horizontal. Moreover, the conveyance direction of the conveyance system 140 is also substantially horizontal, and the arrangement direction of the ejection slit array 150 is also substantially horizontal, which are parallel to each other. By arranging in this way, the height of the entire apparatus is suppressed. In this state, it is difficult for the cold air blown to the blower fan 130 to reach the surfaces of the ejection slit array 150 and the transport system 140. Therefore, the air blowing direction of the blower fan 130 is bent by the wind direction adjusting body 180. In the example of FIG. 1, the airflow that is blown substantially horizontally from both sides toward the center is bent so as to be ejected downward by the airflow direction adjusting body 180, and the airflow direction is opposed to the jet slit array 150 below.
With the configuration using the wind direction adjusting body 180, the arrangement direction of the cooler 120 and the blower fan 130 can be made substantially parallel to the conveyance direction of the conveyance system 140, and the height of the entire apparatus can be reduced and downsized. .

In addition, it is preferable that the wind direction adjustment body 180 is a structure which changes a wind direction so that the momentum of a cold airflow may become equal.
FIG. 2 is a view showing a structural example of the wind direction adjusting body 180. Here, as shown in FIG. 2, a concentric cylindrical body is cut along the axial direction, and has a columnar structure in which the outer periphery is an arc of ¼. The arrangement direction is arranged such that its axis is orthogonal to the blowing direction of the blower fan.
FIG. 2B is a diagram illustrating the flow of the cold air flow blown from the blower fan 130. As shown in FIG. 2B, that is, the cold air flow blown from the blower fan 130 is initially ejected in a substantially horizontal direction, but the cold air flow hits the wind direction adjusting body 180 so that the cold air flow is the wall surface of the arc of the wind direction adjusting body. Are curved downward along the line and are jetted so as to face the jet slit array 150.

  Note that it is preferable that a plurality of curved guides are provided inside the wind direction adjusting body 180. As shown in FIG. 2, the airflow direction adjusting body 180 receives the airflow from the blower fan 130 and bends the airflow. However, since the airflow is physically going straight, there are many guides for curving the airflow direction. It is easier to curve evenly as a whole cold air flow. Therefore, it is possible to devise a method of bending a wind direction for each fine sector by providing a plurality of curve guides. In this example, two curve guides are provided inside the wind direction adjusting body 180. When the wind direction adjusting body 180 is bent with a curve, the outer peripheral speed is high and the wind tends to gather to the outer peripheral side by centrifugal force, so that the atmospheric pressure on the outer peripheral side tends to be slightly higher. Therefore, a curved guide is provided inside to reduce the pressure difference between the outer peripheral side and the inner peripheral side.

  Here, the arrangement interval of the guides of the curve inside the wind direction adjusting body 180 can also be adjusted. For example, among the multiple curve guides, if the entrance width of the guide on the curve near the outer periphery is narrowed and the entrance width of the guide on the curve near the inner periphery is increased, the outer periphery and inner The pressure difference and speed difference on the circumferential side are easily relaxed. In the example of FIG. 2, the guides have substantially the same height.

Next, the transport system 140 will be described.
The transport system 140 includes a transport band 141 that draws an endless track, and a drive mechanism 142 that drives the transport band 141 along the endless track. A mechanism called a conveyor may be used.
The transport band 141 includes one that ensures air permeability and one that does not have air permeability. The transport belt 141 of the present invention can be applied to either type, but in the first embodiment, it will be described as a transport belt 141 in which air permeability is ensured. Note that the conveyance belt 141c (steel belt) having no air permeability will be described later in Example 3, and the description thereof is omitted here.

Examples of the transport band 141 with air permeability ensured according to the first embodiment include a mesh or lattice-shaped opening, that is, a metal mesh belt or a net belt (metal mesh belt). Can pass up and down the transport band through the opening.
FIG. 3 is a diagram simply showing a transport band 141 formed of a mesh conveyor.
The transport band 141 may be any one that can move smoothly along an endless track, but preferably has a high mechanical structure strength. Here, it is preferable that the transport belt has openings such as meshes or lattices so that the cold airflow can pass in the vertical direction. The cold airflow can pass up and down through the opening. The material may be a metal mesh belt, net belt, or the like, but other materials and shapes may be used as long as they have cold resistance and an opening through which cold air passes.

The endless track of the transport band 141 is arranged so that a part thereof passes through the freezer 110 and both ends are drawn out of the freezer.
As shown in FIG. 1, the inlet 143 for the object to be frozen of the transport system 140 is outside the freezer 110, and the object to be frozen prepared in the previous stage is placed on the conveyor at a predetermined interval. The endless track of the transport band 141 passes through the freezer 110, and in the process, the cold air flow ejected downward from the jet slit array 150 is guided to the upper surface of the transport band 141 of the transport system 140, and from the jet nozzle unit array 160. The cold air current jetted upward is guided to the lower surface of the transport band 141 of the transport system 140, and the freezing process is promoted from above and below. The endless track of the transport band 141 is pulled out of the freezer 110, and the objects to be frozen placed on the conveyor are taken out at a predetermined interval and used for the next processing.

Next, the ejection slit array 150 will be described.
The ejection slit array 150 is a unit that is disposed so as to face the upper surface of the transport system 140 and includes a number of ejection slits 151. A large number of each of the ejection slits 151 are arranged so as to open toward the upper surface of the transport system 130.
The injection slit array 150 receives the airflow of the cold airflow guided from the blower fan 130 and injects the rectified cold airflow toward the upper surface of the transport system 140 via the injection slit 151.

FIG. 4 is a view showing a cross section of the ejection slit 151 and the ejection slit body 152 constituting the ejection slit array 150. In addition, although illustration is abbreviate | omitted about the flame | frame which supports the slit body 152, the ejection slit body 152 is supported by the support frame in the form which does not obstruct the formation of the ejection slit 151.
As shown in FIG. 4, as an example of the structure of the ejection slit array 150, a large number of slit bodies 152 that form the ejection slits 151 are arranged.

  The slit body 152 is a mountain-shaped taper body having a convex upper surface and a side wall having a vertical wall surface, and the gap between the vertical wall surfaces of the adjacent mountain-shaped taper bodies becomes the ejection slit 152. Yes. In the structural example shown in FIG. 4, the structure of the injection slit 151 is a three-dimensional structure having a depth, and the injection direction of the cold air flow guided downward is easily controlled and easily rectified. If it is a flat slit with little depth, if the cold airflow passes through the slit in an oblique direction, the cold airflow injected by the slit is dispersed in various directions and turbulent flow is generated. If the structure of the slit 151 is a three-dimensional structure having a depth, since the cold airflow is flown in the vertical direction by passing through the injection slit 151 and rectified, the cold airflow is injected in the vertical direction. It can be seen that it is easy to be rectified.

  Next, as shown in FIG. 4B, in this example, each of the ejection slit bodies 152 has a structure that is independent. The jet slit bodies 152 are mounted and assembled individually on the base frame of the jet slit array 150 one by one. If the injection slit body 152, which is a mountain-shaped taper body, has an independent structure in this way, when it is desired to access the transport system for maintenance or the like, it is not necessary to remove the entire injection slit array 150, and the injection at the corresponding portion is performed. By simply removing the slits 151 individually, the surface of the transport system 140 at the corresponding location can be accessed.

Next, a height adjustment mechanism that adjusts the height of the ejection slit array 150 will be described. FIG. 5 is a diagram illustrating how the height of the ejection slit array 150 is adjusted. In this configuration example, the height of the entire unit of the ejection slit array 150 can be adjusted. Although detailed illustration of the height adjustment mechanism is omitted, if the height of each base frame of the ejection slit array 150 can be adjusted by following the rotation of the lever, the height of each ejection slit 151 can be operated in common. It becomes possible.
If the height of the ejection slit array 150 can be adjusted, the distance between the ejection slit 151 and the upper surface of the transport system 140 can be adjusted, the speed at which the cold airflow is applied can be changed, and the refrigeration speed can be easily adjusted.

Next, the injection nozzle unit array 160 will be described.
FIG. 6 is a cross-sectional view showing the structure of the injection nozzle unit array 160.
As shown in FIG. 6, the spray nozzle unit array 160 has a structure in which a large number of spray nozzle units 161 are arranged substantially in parallel with a predetermined pitch interval. Each injection nozzle unit 161 is disposed so as to open toward the lower surface of the transport system 140. Further, a gap between the respective injection nozzle units 161 serves as a cold air flow recovery slit 162 that guides the cold air flow downward. That is, the injection nozzle unit array 160 has a structure in which the injection nozzle units 161 and the cold air flow recovery slits 162 are alternately provided.

  Each of the injection nozzle units 161 is a hollow box, and has a structure in which a groove-like nozzle is provided on the upper surface. Inside the injection nozzle unit 161, the cool air generated by the cooler 120 is guided through a path (not shown) and blown. For example, the air is blown by the blower fan 130 from the depth direction in the drawing toward the front. Therefore, the cold air flow sent to the injection nozzle unit 161 becomes only the groove-like injection nozzle whose outlet is provided on the upper surface, and the cold air current is injected from the injection nozzle and sprayed to the lower surface of the opposite transport system 140.

  The cold air flow recovery slit 162 is a slit provided adjacent to the injection nozzle unit 161 and guides the cold air flow downward. The cold air current jetted from the jet nozzle unit 161 is sprayed onto the object to be frozen flowing through the transport system 140, and then moves downward and is drawn downward from the nearest cold air flow collecting slit 162.

  Here, the width of the cold air flow recovery slit 162 is wider than the injection groove of the injection nozzle unit 161, and is adjusted so that the recovery capability of the cold air flow is increased, and the injection cold air flow and the injection slit from the injection nozzle unit 161 are adjusted. A cold airflow corresponding to the total of the jet cold airflows from 151 passes downward. Due to the capability of the cold air flow recovery slit 162, the inside of the freezer 110 flows from the upper side to the lower side as a macro cold air flow, and the inside of the freezer 110 is rectified as a whole through the cold air flow recovery slit 162. .

FIG. 7 is a diagram showing the flow of the macro cold airflow in the freezer 110 in an easy-to-understand manner. As shown in FIG. 7, the cold air current ejected downward from the ejection slit array 150 is guided to the upper surface of the transportation belt 141 of the transportation system 140, and the cold air stream ejected upward from the ejection nozzle unit array 160 is transported by the transportation system 140. While being guided to the lower surface of the belt 141, the cold air flow subjected to the freezing process is recovered downward from the cold air flow recovery slit 162 and circulated to the cooler 120 through the cold air recovery path 170. In FIG. 1, the cold air recovery path 170 is only partially shown, and is numbered only below the cold air flow recovery slit 162 of the injection nozzle unit array 160, but the cold air recovery path 170 is below the cold air current recovery slit 162. To the cooler 120 through a route (not shown).
The flow of the macro cold air flow in the freezer 110 can be rectified through the cold air flow recovery slit 162, and the excessive turbulent flow is not caused by the collision between the cold air flow from the upper side and the cold air flow from the lower side. The freezing quality is improved.

Here, the point that the injection nozzle units 161 and the cold air flow recovery slits 162 are alternately arranged, and the relationship between the arrangement pitch and the arrangement pitch of the injection slits will be described.
In the nozzle unit array 160, the nozzle units 161 and the cold air flow recovery slits 162 are alternately arranged. A large number of cold air flow recovery slits 162 are formed at appropriate intervals, and the cold air flow is drawn downward, so that the cold air flow gathered in the vicinity of the transport system 140 is smoothly guided downward, and the macro flow is easily rectified.

8 and 9 are diagrams for explaining the relationship between the pitch of the arrangement of the ejection slits 151 in the ejection slit array 150 and the pitch of the arrangement of the nozzle units 161 in the nozzle unit array 160. FIG.
In the example of the arrangement in FIG. 8, the pitch of the arrangement of the ejection slits 151 in the ejection slit array 150 is substantially equal to the pitch of the arrangement of the nozzle units 161 in the nozzle unit array 160. Further, the arrangement position of the ejection slits 151 in the ejection slit array 150 is provided at a position facing the arrangement position of the nozzle units 161 in the nozzle unit array 160. In this arrangement example, the arrangement of the cold airflows injected from above to the vicinity of the conveyance system 140 and the arrangement of the cold airflows injected from below to the vicinity of the conveyance system 140 are substantially equal, and the upper and lower parts are homogeneous with respect to the object to be frozen. A cold airflow can be applied to the.

  In the example of the arrangement in FIG. 9, the pitch of the jet slits 151 in the jet slit array 150 is substantially equal to the pitch of the cool air flow recovery slits 162 in the nozzle unit array 160. The arrangement position of the ejection slits 151 is provided at a position facing the arrangement position of the cold air flow recovery slits 162 in the nozzle unit array 160. In this arrangement example, since the cold air flow ejected from the upper jet slit array 150 directly corresponds to the cold air flow recovery slit 162, the cold air flow is easily rectified and the recovery becomes smooth.

  In the present invention, a design in which the pitch of the arrangement of the ejection slits 151 in the ejection slit array 150 is different from the pitch of the arrangement of the nozzle units 161 in the nozzle unit array 160 is also possible. For example, there may be a combination in which the arrangement pitch of the ejection slits 151 in the ejection slit array 150 is narrow and dense, and the arrangement pitch of the nozzle units 161 in the nozzle unit array 160 is wide and sparse. It is easy to deal with a case where the upper refrigeration speed needs to be higher than the lower refrigeration speed in accordance with the shape and contents of the object to be frozen. For example, for pizza or the like, ingredients and cheese are placed on the upper part and only the pizza dough is on the lower part, and it may be better to adjust the freezing speed up and down.

  Conversely, for example, a combination in which the arrangement pitch of the ejection slits 151 in the ejection slit array 150 is formed wide and sparse, and the arrangement pitch of the nozzle units 161 in the nozzle unit array 160 is narrow and dense is also formed. possible. For example, there are cases where it is better to adjust the refrigeration speed at the top and bottom of a frozen udon with soup stock so that the bottom portion is difficult to freeze in a frozen object filled with soup stock.

As Example 2, a configuration example will be described in which a motor of a blower fan is provided outside the freezer and connected from the motor to the blades of the blower fan by a bearing.
Example 2 shows two configuration examples.
FIG. 10 is a diagram illustrating a refrigeration apparatus 100a that is a first configuration example of the second embodiment.
In the configuration example shown in FIG. 10, the blowing direction of the blower fan 130 a is the vertical direction, and a plurality of blower fans 130 a are arranged along the transfer direction of the transfer system 140. Although the cooler 110a is also mounted in the vertical direction, in the configuration example of FIG. 10, one cooler 110a is provided on each of the start side and the end side in the transfer direction of the transfer system 140. When viewed macroscopically, the opening of the cooler 120a communicates with the back side of the blower fan 130a, and the cool air is drawn from the opening of the cooler 120a by the blowing of the blower fan 130a. Note that the direction in which the cool air is drawn from the opening of the cooler 120 a and reaches the blower fan 130 a is substantially parallel to the transport direction of the transport system 140.

In addition, the freezer 110, the conveyance system 140, the injection slit array 150, and the injection nozzle unit array 160 in FIG. 10 may be the same as those in the first embodiment, and a detailed description thereof is omitted here.
The blower fan 130a includes various elements such as a blade 131a, a rotating shaft 132a, a bearing 133a, and a motor 134a, but is simply shown here. In the example of FIG. 10, the motor 134 a is attached outside the freezer 110.
With the above configuration, a motor serving as a heat source is provided outside the refrigerator, so that the refrigeration load can be reduced.

  Since the blowing direction of the blower fan 130a is the direction facing the jet slit array 150, the flow of the cold airflow is directed to the jet slit array 150, and the wind direction adjusting body 180 is unnecessary.

Next, FIG. 11 is a diagram illustrating a refrigeration apparatus 100b that is a second configuration example of the second embodiment.
In the configuration example shown in FIG. 11, the blowing direction of the blower fan 130 b is a vertical direction, and a plurality of blower fans 130 b are arranged along the transfer direction of the transfer system 140. The cooler 110b is also mounted in the vertical direction, but in the configuration example of FIG. 11, the cooler 110b is also arranged with a plurality of coolers 110b along the transport direction of the transport system 140, like the blower fan 130b. . In FIG. 11, for ease of understanding, the cooler 110b is illustrated as being arranged on the back side of the blower fan 130b, but the cooler 110b is arranged in front of the blower fan 130b. A configuration in which the cooler 110b is arranged on both the front side and the back side of the blower fan 130b is also possible. When viewed macroscopically, the opening of the cooler 120b leads to the back side of the blower fan 130b, and the cool air is drawn from the opening of the cooler 120b by the blowing of the blower fan 130b. Note that the direction in which the cool air is drawn from the opening of the cooler 120 b and reaches the blower fan 130 b is substantially orthogonal to the transport direction of the transport system 140.

  In FIG. 11, the freezer 110, the transport system 140, the ejection slit array 150, and the ejection nozzle unit array 160 may be the same as those in the first embodiment, and detailed description thereof is omitted here.

The blower fan 130b includes various elements such as a blade 131b, a rotating shaft 132b, a bearing 133b, and a motor 134b, but is simply shown here. In the example of FIG. 11, the motor 134 b is attached outside the freezer 110.
With the above configuration, since the motor serving as the heat source is provided outside the warehouse, the temperature inside the warehouse can be easily maintained low, and the running cost required for freezing can be reduced.

  Since the blowing direction of the blowing fan 130b is the direction facing the injection slit array 150, the flow of the cold airflow is directed to the injection slit array 150, and the wind direction adjusting body 180 is unnecessary.

As a third embodiment, a configuration example will be described in which the transport belt of the transport system is not breathable in the vertical direction, such as a steel belt.
FIG. 12 is a diagram illustrating the flow of the cold airflow in the vicinity of the transport band 141c when the transport band 141c of the transport system 140c is a steel belt and there is no air permeability in the vertical direction.

  As shown in the first embodiment and the second embodiment, the cold airflow ejected downward from the ejection slit 151 is sprayed so as to face the upper surface of the transport belt 141c of the transport system 140c. In this case, since there is no air permeability in the vertical direction, as shown in FIG. 12, the cold airflow that has reached the upper surface of the transport band 141c of the transport system 140c from above is diverted from the upper surface of the transport band 141c to the side surface side of the transport band 141c. And led downward. Here, it is preferable that a sufficient gap is provided on the side surface of the transport band 141c of the transport system 140c so that the cold airflow can be bypassed.

  In addition, as shown in the first and second embodiments, the cold air flow injected upward from the injection nozzle 161 is sprayed so as to face the lower surface of the transport band 141c of the transport system 140c. In the case of the belt, since there is no air permeability in the vertical direction, as shown in FIG. 12, the cold airflow that has reached the lower surface of the transport band 141c of the transport system 140c from below is bounced back on the lower surface of the transport band 141c and guided downward.

FIG. 13 is a macro view showing the flow of the cold airflow when the transport band 141c of the transport system 140c is a steel belt. The cold air current ejected from the ejection slit 151 toward the upper surface of the transport band 141c of the transport system 140c flows downward from the upper surface of the transport band 141c to the side surface side of the transport band 141c. Further, the cold air current jetted from the jet nozzle 161 toward the lower surface of the transport band 141c of the transport system 140c is bounced back in the transport band 141c and flows downward. These cold air flows are collected from the cold air flow collecting slit 162 of the injection nozzle unit 160, respectively.
Except for the conveyance belt 141c of the conveyance system 140c being a steel belt, it is the same as Example 1 and Example 2 above.

  The refrigeration apparatus 100 of the present invention described above can be incorporated into various apparatuses. Those uses are not limited and can be applied as long as they are provided with a refrigeration apparatus such as a refrigerator, a freezer or a cold storage.

  As mentioned above, although preferred embodiment in the structural example of the freezing apparatus of this invention was illustrated and demonstrated, it will be understood that various changes are possible without deviating from the technical scope of this invention.

  The refrigeration apparatus of the present invention can be applied to various types of refrigerators, freezers or cold storage apparatuses for which a refrigeration apparatus is widely required regardless of business use or home use.

DESCRIPTION OF SYMBOLS 100 Refrigeration apparatus 110 Freezer 120 Cooler 130 Blower fan 140 Conveyance system 150 Injection slit array 160 Injection nozzle unit array 170 Cold air flow collection path 180 Wind direction convection regulator

Claims (12)

A freezer,
A cooler for supplying cold air to the freezer;
A blower fan arranged to suck or blow cold air cooled by the cooler into the freezer;
The refrigeration apparatus according to claim 1, wherein a motor of the blower fan is provided outside the freezer, and a bearing is connected from the motor to a rotating shaft of the blower fan. A transport system in which a transport belt rotates along an endless track, and a part of the endless track passes through the freezer;
A large number of jetting slits opened toward the upper surface of the transport system are arranged, receive air blown from the blower fan to the upper surface of the transport system, and are rectified toward the upper surface of the transport system through the jet slit. An injection slit array for injecting a cold airflow;
The spray nozzle unit is configured to include a spray nozzle unit that opens toward the lower surface of the transport system, and a number of cold airflow recovery slits that guide the cool airflow downward from the gap between the spray nozzle units. And a jet nozzle unit array for injecting the cold air flow toward the lower surface of the transport belt and guiding the cold air flow downward through the cold air recovery slit as a macro cold air flow. ,
A cold air current ejected downward from the jet slit array is guided to the upper surface of the transport belt of the transport system, and a cold air current ejected upward from the spray nozzle unit array is guided to the lower surface of the transport belt of the transport system, The refrigeration apparatus according to claim 1, wherein the cold airflow subjected to the freezing treatment is circulated from the cold airflow recovery slit to the cooler.   3. The jet nozzle unit array according to claim 2, wherein the jet nozzle units and the cold air flow collecting slits are alternately arranged, and the cold air flow is drawn downward through the cold air flow collecting slits. Refrigeration equipment.   The refrigeration apparatus according to claim 2 or 3, wherein the pitch of the array of the ejection slits in the ejection slit array is substantially equal to the pitch of the array of the ejection nozzle units in the ejection nozzle unit array.   The pitch of the arrangement | sequence of the said ejection slit in the said ejection slit array is a thing substantially the same as the pitch of the arrangement | sequence of the said cold air flow collection | recovery slit in the said ejection nozzle unit array, Either of Claim 2 to 4 characterized by the above-mentioned. Refrigeration equipment.   The refrigeration according to any one of claims 2 to 5, wherein an arrangement position of the injection slits in the injection slit array is in a relationship facing an arrangement position of the injection nozzle units in the injection nozzle unit array. apparatus.   The arrangement position of the said injection slit in the said injection slit array is a relationship which opposes the arrangement position of the said cold air flow collection | recovery slit in the said injection nozzle unit array, The Claim 1 characterized by the above-mentioned. Refrigeration equipment. The blower fan is disposed substantially parallel to the transport direction of the transport system;
8. The wind direction adjusting body of an arc plate shape or an elliptical arc plate shape that bends the wind direction of the cold air flow blown by the blower fan so as to face the jet slit array is provided. The refrigeration apparatus described in 1.   The refrigeration apparatus according to any one of claims 2 to 8, further comprising a height adjusting mechanism that adjusts a height of the ejection slit array, wherein the distance between the slit and the upper surface of the transport system can be adjusted.   In the ejection slit array, the slit body forming each slit is a mountain-shaped tapered body having a convex upper surface and a side wall having a vertical wall surface, and the vertical wall surface of the adjacent mountain-shaped taper body. The refrigeration apparatus according to claim 2, wherein the slit is formed by a gap.   The transport belt of the transport system includes a mesh-shaped or lattice-shaped opening, and the cold airflow is configured to pass up and down the transport belt. The refrigeration apparatus described in 1.   The transport belt of the transport system is a steel belt, and the cold airflow that has reached the surface of the upper surface of the transport system from above is detoured from the surface of the transport belt to the side of the transport belt and guided downward. The refrigeration apparatus according to claim 2, wherein the refrigeration apparatus is a refrigeration apparatus.

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