JP7128034B2 - frieza - Google Patents

Description

The present invention relates to freezers.

2. Description of the Related Art Conventionally, freezers for freezing food and the like are known.
One of the problems with freezers is the formation of frost on the cooler inside the freezer. Factors for this include the inflow of outside air (inflow of moist air) from the opening (entrance or exit) of the freezer, moisture due to transpiration of products passing through the freezer, and the like. As frost formation progresses, heat transfer is hindered and efficiency decreases, so it is necessary to defrost regularly. Since the cooling operation of the freezer stops during the defrost operation, the operating efficiency of the freezer decreases as the number of defrosts increases. Therefore, various configurations for suppressing frost formation in the freezer compartment have been studied.

For example, Patent Literature 1 discloses a method for reducing the amount of moisture in the air in a warehouse. In Patent Document 1, air dehumidified by an air dehumidifying means is sent to a compartment communicating with the warehouse so that the moisture content in the air in the compartment becomes lower than the moisture content in the air in the warehouse.
For example, Patent Literature 2 discloses a continuous tunnel freezer that freezes food while sequentially transferring food to predetermined temperature zones in a tunnel via food transfer means. In Patent Literature 2, the food can enter the freezing temperature zone after removing unnecessary water vapor from the food as droplets in the first temperature zone (non-freezing temperature zone) by a removing means.

Japanese Patent No. 5416343 Japanese Patent No. 3440157

The method of Patent Document 1 is not suitable for a cooling device such as a continuous tunnel freezer in which objects to be cooled are transferred one after another via transfer means. Patent Document 2 discloses a method of removing unnecessary moisture as droplets in a compartment in front of the freezing zone in a continuous tunnel freezer. If the object to be cooled is food, there is a problem in terms of hygiene.

SUMMARY OF THE INVENTION In view of the circumstances as described above, it is an object of the present invention to enable the freezer to operate for a long time by suppressing frost formation in the freezer and reducing the time required for defrosting.

A freezer according to an aspect of the present invention is a freezer for freezing an object, has an opening through which the object can be carried in and out, and freezes while transferring the object via transfer means. a dehumidifier for removing moisture in the air; an intake duct that draws in moist air that is about to enter the inside of the freezer through the opening and sends it to the dehumidifier; a discharge duct for feeding to the inside of the freezer ; a suction hood having a suction port is connected to the suction duct, and the suction port is wider than the opening .

According to this configuration, the inside of the freezer (hereinafter also simply referred to as "inside") can be accessed through the opening of the freezer.
), the outside air (moist air) is sent to the dehumidifier through the suction duct, which suppresses the inflow of moist air into the refrigerator and prevents frost formation. can be suppressed. In addition, by providing a discharge duct for sending dry air dehumidified by the dehumidifier to the inside of the refrigerator, the dry air is sent into the refrigerator through the ejection duct, so that the inside of the refrigerator can be dried and frost formation can be suppressed. be able to. In addition, an air flow cycle is formed in which outside air is captured when it enters the refrigerator, the captured air is dehumidified by the dehumidifier, and the dehumidified air is returned to the interior of the refrigerator. That is, an air circulation line is formed for sucking the moist air that is about to enter the chamber, sending it to the dehumidifying device, and for discharging and inflowing the dehumidified dry air into the chamber. This circulation line can reduce the amount of outside air that directly flows into the inside of the refrigerator, making it easier to keep the inside of the refrigerator in a dry atmosphere. Therefore, it is possible to operate the freezer for a long period of time by suppressing frost formation in the freezer and reducing the time required for defrosting. Since the freezer can be operated for a long time, the production volume can be increased and the standby cost during defrosting can be suppressed. For example, the freezer can be operated continuously for 5 to 6 days as long-term operation.
In addition, since moist air passes through the suction duct through the suction hood, suction of the moist air is facilitated. Furthermore, compared with the case where the size of the suction port is equal to or less than the width of the opening, moist air can be sucked in over a wider range.

1 aspect of this invention WHEREIN: The said suction hood may be arrange|positioned near the said opening.
According to this configuration, it is easy to catch the outside air that is about to enter the refrigerator through the opening, so compared to the case where the suction hood is arranged far away from the opening, it is possible to reduce the amount of moist air that flows into the refrigerator. .

In one aspect of the present invention, the suction hood may be box-shaped.
According to this configuration, since the moist air sucked from the suction port is mixed in the box-shaped suction hood, the moist air having a uniform flow velocity can be sent to the dehumidifier, and the operation efficiency of the dehumidifier is improved.

1 aspect of this invention WHEREIN: The said suction hood may be equipped with the suction side straightening plate which straightens the flow of the moist air sucked from the said suction port.
According to this configuration, since the flow of the moist air is straightened by the suction-side straightening plate, the moist air whose flow is straightened can flow into the suction duct, and the moist air with a uniform flow velocity can be supplied to the dehumidifier. easy to send to

In one aspect of the present invention, the suction port may be positioned at the same height as the opening.
According to this configuration, the suction hood can be arranged in the vicinity of the opening while ensuring the maximum size of the opening, so that the rectifying function of the suction-side rectifying plate can be exhibited more effectively.

In one aspect of the present invention, the suction-side straightening plate may be a punching plate provided with a plurality of punch holes over its entire surface.
According to this configuration, since the flow of moist air is rectified by the plurality of punch holes, the rectifying function of the suction side rectifying plate can be exhibited with a simple configuration.

In one aspect of the present invention, the suction-side current plate may be a slit plate provided with a plurality of slit holes over its entire surface.
According to this configuration, since the flow of moist air is rectified by the plurality of slit holes, the rectifying function of the suction-side rectifying plate can be exhibited with a simple configuration.

In one aspect of the present invention, a discharge hood having a discharge port may be connected to the discharge duct.
According to this configuration, since the dry air is sent into the storage through the discharge hood, the dry air can be discharged to a predetermined position.

In one aspect of the present invention, the discharge hood may be arranged near the opening and further inside than the suction hood connected to the suction duct.
According to this configuration, dry air can be sent into the refrigerator in the vicinity of the opening, and an air flow is formed in which the dry air discharged from the discharge hood pushes out the moist air flowing in from the opening. Therefore, compared with the case where the discharge hood is arranged far from the opening, it is possible to reduce the amount of moist air flowing into the refrigerator.

In one aspect of the present invention, the discharge hood may be box-shaped.
According to this configuration, since the dry air discharged from the discharge port is mixed in the box-shaped discharge hood, the dry air with a uniform flow velocity can be sent into the chamber, and frost formation can be suppressed more effectively. can do.

In one aspect of the present invention, the discharge hood may include a discharge-side straightening plate that straightens the flow of dry air discharged from the discharge port.
According to this configuration, the flow of the dry air is rectified by the discharge-side rectifying plate, so that the dry air with a uniform flow velocity can be easily sent into the refrigerator.

A freezer according to an aspect of the present invention is a freezer for freezing an object, has an opening through which the object can be carried in and out, and freezes while transferring the object via transfer means. a dehumidifier for removing moisture in the air; an intake duct that draws in moist air that is about to enter the inside of the freezer through the opening and sends it to the dehumidifier; a discharge duct for sending to the inside of a freezer, a suction hood having a suction port is connected to the suction duct, a discharge hood having a discharge port is connected to the discharge duct, and the discharge duct is connected to the discharge hood. The outlet is characterized by being larger than the width of said opening.
According to this configuration, the flow of dry air can be straightened in a wider range than in the case where the size of the discharge port is equal to or less than the width of the opening.

A freezer according to an aspect of the present invention is a freezer for freezing an object, has an opening through which the object can be carried in and out, and freezes while transferring the object via transfer means. a dehumidifier for removing moisture in the air; an intake duct that draws in moist air that is about to enter the inside of the freezer through the opening and sends it to the dehumidifier; a discharge duct for sending to the inside of a freezer, a suction hood having a suction port is connected to the suction duct, a discharge hood having a discharge port is connected to the discharge duct, and the discharge duct is connected to the discharge hood. The outlet is characterized by being positioned at the same height as the opening.
According to this configuration, the discharge hood can be arranged in the vicinity of the opening while ensuring the maximum size of the opening, so that the rectifying function of the discharge-side rectifying plate can be exhibited more effectively.

In one aspect of the present invention, the discharge-side straightening plate may be a punching plate provided with a plurality of punch holes over its entire surface.
According to this configuration, since the flow of dry air is rectified by the plurality of punch holes, the rectifying function of the discharge-side rectifying plate can be exhibited with a simple configuration.

In one aspect of the present invention, the discharge-side straightening plate may be a slit plate provided with a plurality of slit holes over its entire surface.
According to this configuration, since the flow of dry air is rectified by the plurality of slit holes, the rectifying function of the discharge-side rectifying plate can be exhibited with a simple configuration.

A freezer according to an aspect of the present invention is a freezer for freezing an object, has an opening through which the object can be carried in and out, and freezes while transferring the object via transfer means. a dehumidifier for removing moisture in the air; an intake duct that draws in moist air that is about to enter the inside of the freezer through the opening and sends it to the dehumidifier; a discharge duct for sending to the inside of the freezer, a suction hood having a suction port is connected to the suction duct, a discharge hood having a discharge port is connected to the discharge duct, and the discharge The hood is characterized by further comprising a baffle plate for blocking the flow of dry air discharged from the discharge port.
According to this configuration, the flow of dry air can be adjusted by the baffle plate.

In one aspect of the present invention, the baffle plate may be inclined such that the flow direction of the dry air discharged from the discharge port is directed toward the interior of the freezer.
According to this configuration, since the dry air is flowed toward the inside of the refrigerator, frost formation can be suppressed more effectively.

In one aspect of the invention, the suction hood and the discharge hood may be adjacent to each other.
By the way, if the suction hood and the discharge hood are far away from each other, there is a high possibility that the air will stagnate between the suction hood and the discharge hood, making it difficult to dry the inside of the refrigerator. On the other hand, according to this configuration, since the suction hood and the discharge hood are adjacent to each other, it is possible to avoid the occurrence of air stagnation between the suction hood and the discharge hood, thereby forming the air circulation line. It is possible to make it easier to dry the inside of the refrigerator.

One aspect of the present invention may further include a separate chamber that is arranged adjacent to the freezer and communicates with the interior of the freezer through the opening.
According to this configuration, it is possible to further reduce the possibility of direct inflow of outside air into the refrigerator. In addition, since work around the opening can be done in a separate room, maintenance is improved.

In one aspect of the present invention, the suction duct and the discharge duct may be connected to the separate chamber.
According to this configuration, it is possible to suppress the amount of moist air flowing into the compartment by setting the separate room to a dry atmosphere, thereby suppressing frost formation in the compartment.

In one aspect of the present invention, it may further include a positive pressure valve that sends dry air dehumidified by the dehumidifier to the inside of the freezer and makes the pressure inside the freezer a positive pressure higher than atmospheric pressure. .
According to this configuration, since air flows from the inside to the outside of the refrigerator through the opening, it is possible to suppress the outside air (moist air) from flowing into the refrigerator, and to more effectively suppress frost formation. . In addition, the internal pressure can be adjusted by opening and closing the positive pressure valve.

A freezer according to an aspect of the present invention is a freezer for freezing an object, has an opening through which the object can be carried in and out, and freezes while transferring the object via transfer means. a dehumidifier for removing moisture in the air; an intake duct that draws in moist air that is about to enter the inside of the freezer through the opening and sends it to the dehumidifier; It is characterized by comprising a discharge duct for sending air to the inside of the freezer, and a decompression valve for sending air inside the freezer to the dehumidifier and decompressing the inside of the freezer .
According to this configuration, it is possible to send the inside air to the dehumidifying device through the decompression valve, so it is possible to prevent the inside pressure from becoming excessively high.

In one aspect of the present invention, a plurality of dehumidifiers may be provided.
According to this configuration, frost formation can be suppressed more effectively than when only one dehumidifier is provided.

A freezer according to an aspect of the present invention is a freezer for freezing an object, and has a freezer entrance into which the object can be brought in, and a freezer exit into which the object can be carried out, and transfer means a freezer that freezes the object while transferring it through a dehumidifier that removes moisture in the air; a dehumidifier that removes moisture from the air; a front chamber having a front chamber inlet for inflow; a rear chamber disposed adjacent to the freezer and communicating with the interior of the freezer through the freezer outlet and having a rear chamber outlet through which moist air flows; an inlet-side suction duct for sending moist air about to enter the front chamber through the inlet to the dehumidifier, and an outlet-side suction duct for sending moist air about to enter the rear chamber through the rear chamber outlet to the dehumidifier. an inlet -side discharge duct for sending dry air dehumidified by the dehumidifier to the front chamber; and an outlet-side discharge duct for sending dry air dehumidified by the dehumidifier to the rear chamber; A suction hood having a suction port is connected to at least one of the duct and the outlet side suction duct, and the suction port is wider than the corresponding front chamber inlet or rear chamber outlet. Characterized by
According to this configuration, the inside of the freezer can be kept in a dry atmosphere, and frost formation can be suppressed.

A freezer according to an aspect of the present invention is a freezer for freezing an object, and has a freezer entrance into which the object can be brought in, and a freezer exit into which the object can be carried out, and transfer means a freezer that freezes the object while transferring the object through a dehumidifier that removes moisture in the air; and an inlet-side suction duct that sends moist air that is about to enter the inside of the freezer through the freezer inlet to the dehumidifier. an exit-side intake duct for sending moist air that is about to enter the inside of the freezer through the freezer outlet to the dehumidifier; and an outlet side discharge duct for sending dry air dehumidified by the dehumidifier to the inside of the freezer near the outlet of the freezer, wherein the inlet side suction duct and the outlet side suction duct A suction hood having a suction port is connected to at least one of them, and the suction port is wider than the corresponding freezer inlet or freezer outlet .
According to this configuration, frost formation can be suppressed in a circulation-type configuration that does not include a separate chamber.

A freezer according to an aspect of the present invention is a freezer for freezing an object, and has a freezer entrance into which the object can be brought in, and a freezer exit into which the object can be carried out, and transfer means a freezer that freezes the object while transferring it through a dehumidifier that removes moisture in the air; a dehumidifier that removes moisture from the air; a front chamber having a front chamber inlet for inflow; a rear chamber disposed adjacent to the freezer and communicating with the interior of the freezer through the freezer outlet and having a rear chamber outlet through which moist air flows; an inlet-side suction duct for sending moist air about to enter the front chamber through the inlet to the dehumidifier, and an outlet-side suction duct for sending moist air about to enter the rear chamber through the rear chamber outlet to the dehumidifier. an inlet side discharge duct for sending the dry air dehumidified by the dehumidifier to the front chamber, an outlet side discharge duct for sending the dry air dehumidified by the dehumidifier to the rear chamber, and a branch from the inlet side discharge duct. and an inlet-side branch duct connected to the freezer, an outlet-side branch duct branched from the outlet-side discharge duct and connected to the freezer, and the dry air dehumidified by the dehumidifier through the inlet-side branch duct. The dry air dehumidified by the dehumidifying device is sent through the inlet side positive pressure valve that sends air into the freezer and makes the pressure inside the freezer positive pressure higher than the atmospheric pressure, and the outlet side branch duct. an outlet side positive pressure valve that sends the air to the inside of the freezer and makes the pressure inside the freezer a positive pressure higher than the atmospheric pressure , wherein at least one of the inlet side suction duct and the outlet side suction duct has an outlet side positive pressure valve. , a suction hood having a suction opening, said suction opening being wider than the corresponding front chamber inlet or rear chamber outlet .

According to this configuration, the inlet side positive pressure valve sends dry air dehumidified by the dehumidifier into the freezer through the inlet side branch duct to make the pressure inside the freezer positive pressure higher than the atmospheric pressure, and the outlet An outlet side positive pressure valve that sends dry air dehumidified by the dehumidifier to the inside of the freezer through the side branch duct and makes the pressure inside the freezer positive pressure higher than the atmospheric pressure. Since air flows from the inside to the outside of the freezer through the freezer outlet, outside air (moist air) can be suppressed from flowing into the freezer, and frost formation can be suppressed more effectively. Therefore, frost formation can be suppressed in a system (slight positive pressure system) in which a circulation system and a positive pressure system (one-way system) are combined.

A freezer according to an aspect of the present invention is a freezer for freezing an object, and has a freezer entrance into which the object can be brought in, and a freezer exit into which the object can be carried out, and transfer means a freezer that freezes the object while transferring it through a dehumidifier that removes moisture in the air; a dehumidifier that removes moisture from the air; a front chamber having a front chamber inlet for inflow; a rear chamber disposed adjacent to the freezer and communicating with the interior of the freezer through the freezer outlet and having a rear chamber outlet for inflow of moist air; and the dehumidifier. an inlet side discharge duct for sending the dry air dehumidified by the above to the front chamber, an outlet side discharge duct for sending the dry air dehumidified by the dehumidifier to the back chamber, and an inlet side connected to the inlet side discharge duct and an outlet-side discharge hood connected to the outlet-side discharge duct, wherein the outlet of at least one of the inlet-side discharge hood and the outlet-side discharge hood is connected to the corresponding front chamber inlet or outlet. It is characterized by being larger than the width of the rear chamber outlet .
According to this configuration, since dry air is sent into the refrigerator through each discharge duct, the interior of the refrigerator can be dried, and frost formation can be suppressed. Therefore, frost formation can be suppressed in the positive pressure type (one-way type).

A freezer according to an aspect of the present invention is a freezer for freezing an object, and has a freezer entrance into which the object can be brought in, and a freezer exit into which the object can be carried out, and transfer means a freezer that freezes the object while transferring it via a first dehumidifier that removes moisture in the air; a second dehumidifier that is provided independently of the first dehumidifier; a front chamber having a front chamber inlet that communicates with the inside of the freezer through the freezer inlet and into which moist air flows; a rear chamber communicating with and having a rear chamber outlet into which moist air flows; an inlet-side suction duct for sending the moist air that is about to enter the front chamber through the front chamber inlet to the first dehumidifier; and the rear chamber an outlet side suction duct for sending moist air about to enter the rear chamber through the outlet to the second dehumidifier; an inlet side discharge duct for sending dry air dehumidified by the first dehumidifier to the front chamber; an outlet side discharge duct for sending dry air dehumidified by a second dehumidifier to the rear chamber , wherein at least one of the inlet side suction duct and the outlet side suction duct has a suction port. are connected, and the suction port is wider than the corresponding front chamber inlet or rear chamber outlet .
According to this configuration, by providing the first dehumidifier for removing moisture in the air and the second dehumidifier provided independently from the first dehumidifier, only one dehumidifier is provided. Frost formation can be suppressed more effectively than in the case where the Therefore, frost formation can be suppressed in the two dehumidifier system.

ADVANTAGE OF THE INVENTION According to this invention, the freezer which can suppress frost formation can be provided, achieving energy saving.

Schematic diagram of the freezer according to the embodiment. Schematic of the dehumidifier which concerns on embodiment. The perspective view of the dehumidification duct which concerns on embodiment. The top view of the dehumidification duct which concerns on embodiment. FIG. 5 is a diagram including a VV cross section of FIG. 4; Schematic of the straightening plate which concerns on embodiment. Explanatory drawing of the flow of the air which concerns on embodiment. The schematic of the rectifier plate which concerns on the modification of embodiment. The figure containing the cross section of the dehumidification duct which concerns on the modification of embodiment. Schematic diagram of a freezer according to a first modification of the embodiment. Explanatory drawing of the flow of the air which concerns on the 1st modification of embodiment. Schematic diagram of a freezer according to a second modification of the embodiment. Explanatory drawing of the flow of the air which concerns on the 2nd modification of embodiment. Schematic diagram of a freezer according to a third modification of the embodiment. Explanatory drawing of the flow of the air which concerns on the 3rd modification of embodiment. Schematic diagram of a freezer according to a fourth modification of the embodiment. Explanatory drawing of the flow of the air which concerns on the 4th modification of embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each figure, the same code|symbol is attached|subjected about the same structure. In the embodiments, as an example of a freezer, a freezer that uses packaged food (hereinafter also referred to as “packaged food”) as an object and uses a conveyor as a transfer means will be described.

[Freeza 1]
As shown in FIG. 1, a freezer 1 has a freezer entrance 2 into which an object (packaged food) can be brought in, and a freezer exit 3 into which an object can be carried out. A freezer 5 that freezes while transferring an object (not shown), a dehumidifier 6 that removes moisture in the air, and are arranged adjacent to the freezer 5 and communicate with the interior (inside) of the freezer 5 through the freezer entrance 2. a front chamber 11 (separate chamber) that is adjacent to the freezer 5 and communicates with the inside of the freezer through the freezer outlet 3; air) to the dehumidifier 6, an exit-side intake duct 8 that sends moist air that is about to enter the rear chamber 12 through the rear chamber outlet 16 to the dehumidifier 6, and air dehumidified by the dehumidifier 6. An entrance-side discharge duct 9 for sending (dry air) to the front chamber 11 and an exit-side discharge duct 10 for sending dry air dehumidified by the dehumidifier 6 to the rear chamber 12 are provided.

A heat exchanger (cooler) (not shown) is provided in the storage. In the freezer 5, a low-temperature refrigerant is sent from a refrigerator (not shown) to a cooler, and heat is exchanged between the low-temperature refrigerant and the air in the refrigerator, thereby cooling the air in the refrigerator. For example, the inside air is maintained at a temperature of -25°C.
In addition, in the embodiment, the dehumidification device 6 dehumidifies the front chamber 11, the rear chamber 12, and the inside of the refrigerator. The dehumidifying device 6 makes the amount of water vapor contained in the air in the refrigerator equal to or less than the saturated water vapor amount with respect to the air temperature in the refrigerator. For example, the dehumidifier 6 dehumidifies the inside air temperature of −25° C. so that the amount of water vapor is less than or equal to the saturated water vapor amount.

The freezer 5 is a so-called continuous tunnel freezer that freezes while transporting the object via the conveyor 4 . The freezer 5 has a rectangular parallelepiped box shape extending in one direction (horizontal direction). The freezer entrance 2 is provided on one side of the freezer 5 . The freezer outlet 3 is provided on the other side of the refrigerator main body (the side opposite to the freezer inlet 2).

The front chamber 11 is arranged adjacent to one side of the freezer 5 . The front chamber 11 has a rectangular parallelepiped box shape along one side of the freezer 5 . The front chamber 11 is smaller than the freezer 5. The antechamber 11 has an antechamber entrance 15 through which an object can be introduced. The front chamber entrance 15 is provided on one side surface of the front chamber 11 (the surface opposite to the freezer entrance 2). The other side surface of the front chamber 11 faces one side surface of the freezer 5 . An arrow E1 in the drawing indicates the introduction direction of the object.

The rear chamber 12 is arranged adjacent to the other side of the freezer 5 (the side opposite to the front chamber 11). The rear compartment 12 has a rectangular parallelepiped box shape along the other side of the freezer 5 . The rear compartment 12 is smaller than the freezer 5. One side of the rear chamber 12 faces the other side of the freezer 5 . The rear chamber 12 has a rear chamber outlet 16 through which the object can be delivered. The rear chamber outlet 16 is provided on the other side of the rear chamber 12 (the side opposite to the freezer outlet 3). An arrow E2 in the drawing indicates the derivation direction of the object.

The freezer 5 communicates with a pre-process section (not shown) (for example, a packaged food manufacturing apparatus) via a freezer entrance 2, a front chamber 11, and a front chamber entrance 15. The freezer 5 communicates with a post-process section (not shown) (for example, a frozen food storage) via a freezer outlet 3 , a rear chamber 12 and a rear chamber outlet 16 . The conveyor 4 transports the object carried in from the entrance 15 of the front chamber toward the exit 16 of the rear chamber.

[Dehumidifier 6]
As shown in FIG. 2, the dehumidifying device 6 includes a desiccant rotor 20 that carries an adsorbent (not shown) and is divided into an adsorption zone 18 and a regeneration zone 19, and near the front chamber inlet 15 and the rear chamber outlet 16 ( A processing fan 21 for sending the air in the vicinity of the opening to the adsorption zone 18, a processing filter 22 for removing dust in the air heading for the adsorption zone 18, and a precooler 23 for cooling the air heading for the adsorption zone 18. , an aftercooler 24 that cools the air that has passed through the adsorption zone 18, a regeneration fan 25 that sends outside air to the regeneration zone 19, a regeneration filter 26 that removes dust in the air heading for the regeneration zone 19, and a heating means 27 for heating the incoming air.

Air near the opening is introduced into the adsorption zone 18 by the processing fan 21 . Dust and the like are removed from the air in the vicinity of the opening by the processing filter 22 . The air passing through the treatment filter 22 is precooled in a precooler 23 (eg cooling coil) to increase the relative humidity. Air with increased relative humidity is flowed into adsorption zone 18 . The air with increased relative humidity is adsorbed with water vapor (humidity) by the adsorbent in the adsorption zone 18 . The air that has adsorbed moisture becomes hot due to the heat of adsorption generated from the adsorbent during adsorption. The high-temperature air is cooled by an aftercooler 24 (for example, a cooling coil) to become low-temperature dry air. Cold dry air is supplied to the vicinity of the opening. In FIG. 2, arrow V1 indicates the flow of air near the opening toward the adsorption zone 18, and arrow V2 indicates the flow of low-temperature dry air toward the vicinity of the opening.

Outside air is introduced into the regeneration zone 19 by the regeneration fan 25 on the side where the adsorbent adsorbed by the desiccant rotor 20 is regenerated. Dust and the like are removed from the outside air by the regeneration filter 26 . The air passing through the regeneration filter 26 is heated by a heating means 27 (eg, a heating coil) and supplied with heat to desorb moisture from the regeneration zone 19 . The heated air supplied with the heat quantity is flowed into the regeneration zone 19 . The heated air desorbs moisture adsorbed on the desiccant rotor 20 due to its inherent heat. The desorbed moisture-laden air is discharged to the outside. In FIG. 2, arrow V3 indicates the flow of outside air toward the regeneration zone 19, and arrow V4 indicates the flow of desorbed moisture-containing air discharged to the outside.

According to the embodiment, by providing the desiccant rotor type dehumidifier 6 as the dehumidifier 6, adsorption of moisture in the air and desorption of the adsorbed moisture can be continuously performed by one device. . In addition, since the dehumidification can be performed while the freezing operation is continued, the operation efficiency is improved.

[Inlet side suction hood 30]
As shown in FIG. 1 , an inlet side suction hood 30 is connected to the inlet side suction duct 7 . The inlet side suction hood 30 is arranged in the vicinity of the front chamber inlet 15 in the front chamber 11 . The entrance-side suction hood 30 is attached to the inner wall above the front chamber entrance 15 in the front chamber 11 . As shown in FIG. 3, the inlet side suction hood 30 is connected to the inlet side suction duct 7 and is capable of sucking in moist air.

As shown in FIG. 5, the inlet side suction hood 30 has a box shape with a moist air suction port 40 . The suction port 40 of the inlet side suction hood 30 is larger than the opening of the inlet side suction duct 7 . The inlet-side suction hood 30 includes a suction-side straightening plate 42 that straightens the flow of moist air sucked from the suction port 40 . An arrow M1 in the drawing indicates the direction of transfer of the object.

As shown in FIG. 4, the entrance side suction hood 30 has a rectangular parallelepiped box shape extending in a direction T1 perpendicular to the object transfer direction M1 and parallel to the horizontal direction. As shown in FIG. 5 , the suction port 40 is provided on the lower surface of the inlet side suction hood 30 . The suction port 40 opens toward the upper surface of the conveyor 4 . An arrow J1 in the drawing indicates the flow direction of moist air sucked from the suction port 40 .

The suction side current plate 42 is fixed to the lower surface of the inlet side suction hood 30 . As shown in FIG. 6, the suction-side current plate 42 has a rectangular plate-like shape having a longitudinal direction in the extending direction of the inlet-side suction hood 30 (direction of arrow T1). The suction-side straightening plate 42 is a punching plate provided with a plurality of punch holes 43 over its entire surface. The punched hole 43 has a circular shape when viewed from below.

Here, the length W1 (see FIG. 4) of the front chamber entrance 15 in the direction T1 perpendicular to the moving direction M1 of the object and parallel to the horizontal direction is the "width W1 of the front chamber entrance 15", and the front chamber in the vertical direction is The upper end position H1 (see FIG. 5) of the inlet 15 is defined as "the height H1 of the front chamber inlet 15".
As shown in FIG. 6, the width W2 of the suction port 40 (the width W2 of the suction-side current plate 42) is larger than the width W1 of the front chamber inlet 15 (see FIG. 4) (W2>W1).
As shown in FIG. 5, the height H2 of the suction port 40 (height H2 of the lower end of the suction-side current plate 42) is positioned substantially at the same height as the height H1 of the front chamber inlet 15 ( H1≈H2).

[Inlet side discharge hood 31]
As shown in FIG. 1 , an inlet-side discharge hood 31 is connected to the inlet-side discharge duct 9 . The inlet-side discharge hood 31 is arranged in the vicinity of the front chamber inlet 15 in the front chamber 11 . The inlet-side discharge hood 31 is arranged inside the chamber relative to the inlet-side suction hood 30 . The inlet-side discharge hood 31 is connected to the inlet-side discharge duct 9 and is capable of discharging dry air.

As shown in FIG. 5, the inlet side discharge hood 31 has a box shape with a dry air discharge port 50 . The outlet 50 of the inlet-side outlet hood 31 is larger than the opening of the inlet-side outlet duct 9 . The inlet-side discharge hood 31 includes a discharge-side straightening plate 52 that straightens the flow of dry air discharged from the discharge port 50 and a baffle plate 54 that blocks the flow of the dry air discharged from the discharge port 50 .

As shown in FIG. 4 , the inlet side discharge hood 31 has a rectangular parallelepiped box shape extending in a direction parallel to the extending direction of the inlet side suction hood 30 . The inlet side suction hood 30 and the inlet side discharge hood 31 are adjacent to each other. The inlet side discharge hood 31 is integrally connected to the inlet side suction hood 30 by a connecting plate (not shown). As shown in FIG. 5 , the discharge port 50 is provided on the lower surface of the inlet side discharge hood 31 . The discharge port 50 opens toward the upper surface of the conveyor 4 . An arrow J2 in the drawing indicates the flow direction of the dry air discharged from the discharge port 50 .

The discharge-side straightening plate 52 is fixed to the lower surface of the inlet-side discharge hood 31 . The discharge-side regulating plate 52 has a rectangular plate shape having a longitudinal direction in the extending direction of the inlet-side discharge hood 31 . The discharge side straightening plate 52 is a punching plate similar to the suction side straightening plate 42 .

The longitudinal length of the discharge side current plate 52 is the same as the longitudinal length of the suction side current plate 42 . The width of the discharge port 50 (the width of the discharge-side current plate 52) is larger than the width W1 of the front chamber inlet 15 (see FIG. 4).
The height of the discharge port 50 (the height of the lower end of the discharge-side straightening plate 52) is positioned substantially at the same height as the height H2 of the lower end of the suction-side straightening plate . The height of the lower end of the discharge-side straightening plate 52 is substantially the same as the height H1 of the front chamber inlet 15 .
As shown in FIG. 5 , the length of the discharge-side straightening plate 52 in the short-side direction is shorter than the length of the suction-side straightening plate 42 in the short-side direction.

The baffle plate 54 is inclined so that the flow direction of the dry air discharged from the discharge port 50 is directed toward the inside of the refrigerator. The baffle plate 54 has a plate shape that is linearly inclined so that the lower side is located toward the inside of the freezer 5 . The upper end of the baffle plate 54 is connected to one side wall of the inlet-side discharge hood 31 (the side wall opposite to the freezer inlet 2). A lower end of the baffle plate 54 is connected to one end of the discharge-side straightening plate 52 (the end opposite to the entrance 2 of the freezer).

[Exit side suction hood 32]
As shown in FIG. 1 , an outlet side suction hood 32 is attached to the suction port of the outlet side suction duct 8 . The outlet side suction hood 32 is arranged in the rear chamber 12 in the vicinity of the rear chamber outlet 16 . The outlet side suction hood 32 is attached to the inner wall of the rear chamber 12 above the rear chamber outlet 16 . The outlet-side suction hood 32 is connected to the outlet-side suction duct 8 and is capable of sucking moist air. Since the outlet side suction hood 32 has the same configuration as the inlet side suction hood 30, detailed description thereof will be omitted.

[Outlet side discharge hood 33]
An outlet-side discharge hood 33 is attached to the outlet of the outlet-side discharge duct 10 . The outlet side discharge hood 33 is arranged in the vicinity of the rear chamber outlet 16 in the rear chamber 12 . The outlet-side discharge hood 33 is arranged inside the chamber from the outlet-side suction hood 32 . The outlet side discharge hood 33 is connected to the outlet side discharge duct 10 and is capable of discharging dry air. Since the outlet side discharge hood 33 has the same configuration as the inlet side discharge hood 31, detailed description thereof will be omitted.

[the flow of air]
As shown in FIG. 7 , the inlet side suction duct 7 sends outside air (moist air) that is about to enter the front chamber 11 through the front chamber inlet 15 to the dehumidifier 6 . Hereinafter, in each air line (each duct), the upstream side in the air flow direction will be simply referred to as "upstream side", and the downstream side in the air flow direction will simply be referred to as "downstream side". An upstream end of the inlet side suction duct 7 is connected to the upper surface of the inlet side suction hood 30 . The downstream end of the inlet side suction duct 7 is connected to the dehumidifier 6 (adsorption zone 18). An arrow A1 in the drawing indicates the flow of moist air in the inlet side suction duct 7. As shown in FIG.

The exit-side suction duct 8 sends moist air, which is about to enter the rear chamber 12 through the rear chamber outlet 16 , to the dehumidifier 6 . An upstream end of the outlet side suction duct 8 is connected to the upper surface of the outlet side suction hood 32 . A downstream end of the outlet side suction duct 8 is connected in the middle of the inlet side suction duct 7 . An arrow A2 in the drawing indicates the flow of moist air in the outlet side suction duct 8. As shown in FIG.

The inlet-side discharge duct 9 sends the air (dry air) dehumidified by the dehumidifier 6 into the front chamber 11 in the vicinity of the front chamber inlet 15 . An upstream end of the inlet-side discharge duct 9 is connected to the dehumidifier 6 (adsorption zone 18). A downstream end of the inlet-side discharge duct 9 is connected to the upper surface of the inlet-side discharge hood 31 . An arrow B1 in the drawing indicates the flow of dry air in the inlet-side discharge duct 9. As shown in FIG.

The outlet-side discharge duct 10 sends the dry air dehumidified by the dehumidifier 6 into the interior of the rear chamber 16 in the vicinity of the rear chamber outlet 16 . The upstream end of the outlet side discharge duct 10 is connected to the middle of the inlet side discharge duct 9 . A downstream end of the outlet-side discharge duct 10 is connected to the upper surface of the outlet-side discharge hood 33 . An arrow B2 in the drawing indicates the flow of dry air in the outlet-side discharge duct 10. As shown in FIG.

As described above, the freezer 1 according to the above embodiment is a freezer for freezing an object, and includes a freezer entrance 2 into which the object can be brought in and a freezer exit 3 into which the object can be carried out. a freezer 5 that freezes objects while transferring them via a conveyor 4; a dehumidifier 6 that removes moisture in the air; and a front chamber 11 having a front chamber inlet 15 into which moist air flows, and a rear chamber outlet 16 which is arranged adjacent to the freezer 5 and communicates with the inside of the freezer 5 through the freezer outlet 3 and into which moist air flows. , an inlet-side intake duct 7 for sending the moist air about to enter the front chamber 11 through the front chamber inlet 15 to the dehumidifier 6, and the moist air trying to enter the rear chamber 12 through the rear chamber outlet 16. , an outlet side suction duct 8 for sending to the dehumidifier 6, an inlet side discharge duct 9 for sending dry air dehumidified by the dehumidifier 6 to the front chamber 11, and a dry air dehumidified by the dehumidifier 6 for sending to the rear chamber 12. and an outlet side discharge duct 10 .

According to this configuration, the inlet-side suction duct 7 that sends the moist air about to enter the front chamber 11 through the front chamber inlet 15 to the dehumidifier 6, and the moist air that tries to enter the rear chamber 12 through the rear chamber outlet 16 By providing the outlet side suction duct 8 sent to the dehumidifier 6, the outside air (moist air) is sent to the dehumidifier 6 through the respective suction ducts 7 and 8. ) and the inflow into the storage can be suppressed, and frost formation can be suppressed. In addition, an inlet side discharge duct 9 for sending dry air dehumidified by the dehumidifier 6 to the front chamber 11 and an outlet side discharge duct 10 for sending dry air dehumidified by the dehumidifier 6 to the rear chamber 12 are provided. Since dry air is sent into the separate compartment and inside the refrigerator through the discharge ducts 9 and 10, the inside of the refrigerator can be dried and frost formation can be suppressed. In addition, an air flow cycle is formed in which outside air is captured when it enters the separate room, the captured air is dehumidified by the dehumidifier 6, and the dehumidified air is returned to the inside of the refrigerator. That is, an air circulation line is formed for sucking the moist air that is about to enter the separate room, sending it to the dehumidifying device 6, and discharging the dehumidified dry air into the separate room. This circulation line can reduce the amount of outside air that directly flows into the separate room and inside of the refrigerator, making it easier to maintain a dry atmosphere inside the refrigerator. Therefore, it is possible to operate the freezer for a long period of time by suppressing frost formation in the freezer and reducing the time required for defrosting. Since the freezer can be operated for a long time, the production volume can be increased and the standby cost during defrosting can be suppressed. For example, the freezer can be operated continuously for 5 to 6 days as long-term operation.
In addition, by providing the front chamber 11 and the rear chamber 12 as separate chambers, the following effects can be obtained. It is possible to further reduce the possibility of direct inflow of outside air into the refrigerator. In addition, since work around the opening can be done in a separate room, maintenance is improved.
In addition, the suction ducts 7, 8 and the discharge ducts 9, 10 are connected to the separate chambers, thereby providing the following effects. By creating a dry atmosphere in the separate room, it is possible to suppress the amount of moist air that flows into the inside of the refrigerator, thereby suppressing the formation of frost inside the refrigerator.

In the above-described embodiment, the suction hoods 30 and 32 having the suction port 40 are connected to the suction ducts 7 and 8, thereby providing the following effects.
According to this configuration, since the moist air passes through the suction ducts 7 and 8 through the suction hoods 30 and 32, suction of the moist air is facilitated.

In the above embodiment, the suction hoods 30, 32 are arranged in the vicinity of the openings 15, 16, thereby providing the following effects.
According to this configuration, the outside air that tries to enter the separate room through the openings 15 and 16 can be easily captured, so compared to the case where the suction hoods 30 and 32 are arranged far away from the openings 15 and 16, the air can flow into the refrigerator. Moist air can be reduced.

In the above-described embodiment, the suction hoods 30 and 32 are box-shaped, and thus have the following effects.
According to this configuration, the moist air sucked from the suction port 40 is mixed in the box-shaped suction hoods 30 and 32, so that the moist air having a uniform flow velocity can be sent to the dehumidifier 6. Improves driving efficiency.

In the above-described embodiment, the suction hoods 30 and 32 are provided with the suction-side rectifying plate 42 that rectifies the flow of moist air sucked from the suction port 40, thereby providing the following effects.
According to this configuration, since the flow of the moist air is straightened by the suction side straightening plate 42, the moist air whose flow is straightened can flow into the suction ducts 7 and 8, and the flow speed of the wet air is made uniform. Air can be easily sent to the dehumidifier 6.

In the above-described embodiment, the suction port 40 is larger than the width W1 of the openings 15 and 16, thereby providing the following effects.
According to this configuration, compared to the case where the size of the suction port 40 is equal to or less than the width W1 of the openings 15 and 16, moist air can be sucked in over a wider range.

In the above-described embodiment, the suction port 40 is positioned at the same height as the height H1 of the openings 15 and 16, thereby providing the following effects.
According to this configuration, the suction side rectifying plate 42 can be arranged near the openings 15 and 16 while ensuring the maximum size of the openings 15 and 16, so that the rectifying function of the suction side rectifying plate 42 can be It can be used more effectively.

In the above-described embodiment, the suction-side straightening plate 42 is a punching plate provided with a plurality of punch holes 43 over its entire surface, thereby providing the following effects.
According to this configuration, since the flow of moist air is straightened by the plurality of punch holes 43, the straightening function of the suction side straightening plate 42 can be exhibited with a simple configuration.

In the above-described embodiment, the discharge hoods 31 and 33 having the discharge port 50 are connected to the discharge ducts 9 and 10, thereby providing the following effects.
According to this configuration, the dry air is sent into the chamber through the discharge hood 31, so that the dry air can be discharged to a predetermined position.

In the above-described embodiment, the discharge hoods 31 and 33 are arranged near the openings 15 and 16 and further inside than the suction hoods 30 and 32 connected to the suction ducts 7 and 8. , has the following effects.
According to this configuration, dry air can be sent into the chamber in the vicinity of the openings 15 and 16, and the dry air discharged from the discharge hoods 31 and 33 pushes out the moist air flowing in from the openings 15 and 16. An air flow is formed. Therefore, compared with the case where the discharge hoods 31 and 33 are arranged far from the opening, it is possible to reduce the amount of moist air flowing into the refrigerator.

In the above-described embodiment, the discharge hoods 31 and 33 are box-shaped, thereby providing the following effects.
According to this configuration, the dry air discharged from the discharge port 50 is mixed in the box-shaped discharge hoods 31 and 33, so that the dry air with a uniform flow velocity can be sent into the chamber, and frost formation can be further prevented. can be effectively suppressed.

In the above-described embodiment, the discharge hoods 31 and 33 are provided with the discharge-side straightening plate 52 for straightening the flow of the dry air discharged from the discharge port 50, thereby providing the following effects.
According to this configuration, the flow of the dry air is rectified by the discharge-side rectifying plate 52, so that the dry air with a uniform flow velocity can be easily sent into the refrigerator.

In the above-described embodiment, the ejection port 50 is larger than the width W1 of the openings 15 and 16, thereby providing the following effects.
According to this configuration, compared to the case where the size of the discharge port 50 is equal to or less than the width W1 of the openings 15 and 16, the dry air flow can be straightened in a wider range.

In the above-described embodiment, the ejection port 50 is positioned at the same height as the height H1 of the openings 15 and 16, thereby providing the following effects.
According to this configuration, the discharge hoods 31 and 33 can be arranged in the vicinity of the openings 15 and 16 while ensuring the maximum size of the openings 15 and 16. It can be used more effectively.

In the above-described embodiment, the discharge-side regulating plate 52 is a punching plate provided with a plurality of punch holes 53 over its entire surface, thereby providing the following effects.
According to this configuration, since the flow of dry air is straightened by the plurality of punched holes 53, the straightening function of the discharge side straightening plate 52 can be exhibited with a simple configuration.

In the above-described embodiment, the discharge hoods 31 and 33 further include the baffle plate 54 that blocks the flow of the dry air discharged from the discharge port 50, thereby providing the following effects.
According to this configuration, the flow of dry air can be adjusted by the baffle plate 54 .

In the above-described embodiment, the baffle plate 54 is inclined so that the flow direction of the dry air discharged from the discharge port 50 is oriented toward the inside of the freezer 5, so that the following effects are achieved.
According to this configuration, since the dry air is flowed toward the inside of the refrigerator, frost formation can be suppressed more effectively.

In the above-described embodiment, the suction hoods 30, 32 and the discharge hoods 31, 33 are adjacent to each other, thereby providing the following effects.
By the way, if the suction hoods 30, 32 and the discharge hoods 31, 33 are far apart from each other, the air may stagnate between the suction hoods 30, 32 and the discharge hoods 31, 33, making it difficult to dry the inside of the refrigerator. highly sexual. On the other hand, according to this configuration, since the suction hoods 30, 32 and the discharge hoods 31, 33 are adjacent to each other, air stagnation occurs between the suction hoods 30, 32 and the discharge hoods 31, 33. By avoiding this, the air circulation line is formed, and the inside of the storage can be easily dried.

[Modification]
Modifications of the embodiment will be described below. In the following modified examples, the same reference numerals are given to the same configurations as in the above-described embodiment, and detailed description thereof will be omitted.

In the above-described embodiment, the suction-side straightening plate 42 is a punching plate provided with a plurality of punch holes 43 over its entire surface. For example, as shown in FIG. 8, the suction-side current plate may be a slit plate 42A provided with a plurality of slit holes 43A over its entire surface. According to this configuration, since the flow of moist air is rectified by the plurality of slit holes 43A, the rectifying function of the suction-side rectifying plate can be exhibited with a simple configuration.

In the above-described embodiment, the discharge-side straightening plate 52 is a punching plate having a plurality of punched holes 53 over its entire surface. For example, the discharge-side regulating plate may be a slit plate provided with a plurality of slit holes over its entire surface. According to this configuration, since the flow of dry air is rectified by the plurality of slit holes, the rectifying function of the discharge-side rectifying plate can be exhibited with a simple configuration.

In the above-described embodiment, the baffle plate 54 has a linearly inclined plate shape (see FIG. 5) so that the lower side is positioned inward of the freezer 5. However, the present invention is not limited to this. do not have. For example, as shown in FIG. 9 , the baffle plate 54 may have a plate shape that is linearly inclined so that the lower side is located outside the freezer 5 .
For example, the baffle plate 54 may be configured to be rotatable so that the flow direction J2 of the dry air discharged from the discharge port 50 can be changed (the angle formed with the discharge-side current plate 52 can be adjusted). .

In the above-described embodiment, the freezer 1 has the front chamber 11 and the rear chamber 12 as separate chambers, but the present invention is not limited to this. For example, as shown in FIG. 10, the freezer 101 may not have separate chambers (the front chamber 11 and the rear chamber 12). FIG. 11 shows the air flow in each air line of the freezer 101 of this modification.

The entrance-side suction hood 30 is arranged in the vicinity of the freezer entrance 2 in the freezer 5 . The entrance-side suction hood 30 is attached to the inner wall of the freezer 5 above the entrance 2 of the freezer.
The entrance-side discharge hood 31 is arranged in the vicinity of the freezer entrance 2 in the freezer 5 . The inlet-side discharge hood 31 is arranged inside the chamber relative to the inlet-side suction hood 30 .

The outlet side suction hood 32 is arranged in the vicinity of the freezer outlet 3 in the freezer 5 . The outlet-side suction hood 32 is attached to the inner wall of the freezer 5 above the freezer outlet 3 .
The outlet side discharge hood 33 is arranged in the vicinity of the freezer outlet 3 in the freezer 5 . The outlet-side discharge hood 33 is arranged inside the chamber from the outlet-side suction hood 32 .

In the above embodiment, the freezer 1 has been described with an example (an example of a circulation type) including suction ducts 7, 8 and discharge ducts 9, 10 as lines through which air flows, but the present invention is not limited to this. For example, as shown in FIG. 12, the freezer 201 sends dry air dehumidified by the dehumidifier 6 into the inside of the refrigerator, and further includes positive pressure valves 220 and 221 that make the pressure inside the refrigerator higher than the atmospheric pressure. may be provided.

The freezer of this modification includes an inlet-side branch duct 210 branched from the inlet-side discharge duct 9 and connected to the freezer 5, and an outlet-side branch duct 211 branched from the outlet-side discharge duct 10 and connected to the freezer 5. , the decompressing duct 212 branched from the inlet side suction duct 7 and connected to the freezer 5, and the inlet side branch duct 210, the dry air dehumidified by the dehumidifier 6 is sent into the refrigerator to make the inside of the refrigerator positive pressure. Through the inlet side positive pressure valve 220 and the outlet side branch duct 211, the dry air dehumidified by the dehumidifier 6 is sent into the chamber, and the outlet side positive pressure valve 221 that makes the chamber positive pressure and the pressure reduction duct 212, and a decompression valve 222 for sending the inside air to the dehumidifying device 6 and depressurizing the inside of the refrigerator.

The upstream end of the inlet side branch duct 210 is connected to the middle of the inlet side discharge duct 9 . The downstream end of the inlet-side branch duct 210 is connected to the upper surface of the freezer 5 near the freezer inlet 2 . The arrow C1 in FIG. 13 indicates the flow of dry air in the inlet-side branch duct 210.
The upstream end of the outlet side branch duct 211 is connected to the middle of the outlet side discharge duct 10 . The downstream end of the outlet side branch duct 211 is connected to the upper surface of the freezer 5 near the freezer outlet 3 . The arrow C2 in FIG. 13 indicates the flow of dry air in the branch duct 211 on the outlet side.
The upstream end of the decompression duct 212 is connected to the upper surface of the central portion of the freezer 5 . A downstream end of the decompression duct 212 is connected in the middle of the inlet side suction duct 7 . Arrow D1 in FIG.

In this modification, the dry air dehumidified by the dehumidifier 6 is sent into the chamber through the entrance side branch duct 210, and the pressure inside the chamber is made positive pressure higher than the atmospheric pressure. By providing an outlet side positive pressure valve 221 that sends dry air dehumidified by the dehumidifier 6 into the chamber through the side branch duct 211 and makes the pressure inside the chamber positive pressure higher than the atmospheric pressure, the following Effective.
According to this configuration, air flows from the inside of the refrigerator to the outside of the refrigerator through the freezer inlet 2 or the freezer outlet 3, so that outside air (moist air) can be suppressed from flowing into the refrigerator, and frosting can be more effectively prevented. can be suppressed to Therefore, frost formation can be suppressed in a system (slight positive pressure system) in which a circulation system and a positive pressure system (one-way system) are combined. In addition, the internal pressure can be adjusted by opening and closing the positive pressure valves 220 and 221 .

In this modified example, the following effects are obtained by further providing a decompression valve 222 that sends the air inside the refrigerator to the dehumidifier 6 and decompresses the inside of the refrigerator.
According to this configuration, it is possible to send the inside air to the dehumidifying device 6 through the decompression valve 222, so it is possible to prevent the inside pressure from becoming excessively high.

In the above embodiment, the freezer 1 has been described as an example in which the suction ducts 7, 8 and the discharge ducts 9, 10 are provided as lines through which the air flows, but the present invention is not limited to this. For example, as shown in FIG. 14, the freezer 301 may not have suction ducts 7,8. The freezer 301 may have only the discharge ducts 9, 10 as lines through which air flows.

The freezer of this modified example has an inlet side discharge duct 9 for sending dry air dehumidified by the dehumidifier 6 to the front chamber 11, and an outlet side discharge duct 10 for sending dry air dehumidified by the dehumidifier 6 to the rear chamber 12. an inlet-side discharge hood 31 connected to the inlet-side discharge duct 9 and arranged near the front chamber inlet 15; and an outlet-side discharge hood connected to the outlet-side discharge duct 10 and arranged near the rear chamber inlet 16. 33 and.
FIG. 15 shows the air flow in each air line of the freezer 301 of this modification.

According to this modification, dry air is sent into the refrigerator through the discharge ducts 9 and 10, so that the interior of the refrigerator can be dried and frost formation can be suppressed. Therefore, frost formation can be suppressed in the positive pressure type (one-way type).

In the above embodiment, an example in which only one dehumidifier 6 is provided has been described, but the present invention is not limited to this. For example, as shown in FIG. 16, a plurality of dehumidifiers 6 (two in FIG. 16) may be provided.

The freezer 401 of this modification includes a first dehumidifier 461, a second dehumidifier 462 that is provided independently of the first dehumidifier 461, and damp air that is about to enter the front chamber 11 through the front chamber inlet 15. , the inlet side suction duct 7 that sends to the first dehumidifier 461, the outlet side suction duct 8 that sends the moist air that is about to enter the rear chamber 12 through the rear chamber outlet 16 to the second dehumidifier 462, and the first dehumidifier 461 and an outlet side discharge duct 10 for sending the dry air dehumidified by the second dehumidifier 462 to the rear chamber 12.
FIG. 17 shows the air flow in each air line of the freezer 401 of this modification.

In this modification, by providing the first dehumidifier 461 and the second dehumidifier 462 provided independently from the first dehumidifier 461, compared with the case where only one dehumidifier is provided As a result, frost formation can be more effectively suppressed. Therefore, frost formation can be suppressed in the two dehumidifier system.

In this modified example, an example in which two dehumidifiers are provided has been described, but the present invention is not limited to this. For example, three or more dehumidifiers may be provided. That is, the number of installed dehumidifiers may be changed according to the required specifications.

In the above-described embodiment, an example in which the freezer 5 has the freezer entrance 2 and the freezer exit 3 independently has been described, but the present invention is not limited to this. For example, the freezer 5 may have an opening through which objects can be loaded or unloaded. For example, freezer inlet 2 and freezer outlet 3 may be a common opening. For example, a freezer has an opening through which an object can be carried in or out, a freezer that freezes the object while transferring the object through a transfer means, a dehumidifying device that removes moisture from the air, and an interior of the freezer through the opening. There may be provided an intake duct that feeds incoming moist air to the dehumidifier, and an outlet duct that feeds the dry air dehumidified by the dehumidifier into the interior of the freezer.

In the above embodiment, an example in which the freezer includes a suction hood and a discharge hood has been described, but the present invention is not limited to this. For example, the freezer may not have an intake hood and/or an exhaust hood.

In the above embodiment, a freezer that uses a packaged food as an object and a conveyor that transports the packaged food as a transfer means has been described, but the present invention is not limited to this. For example, unpackaged foods may be used as objects. For example, objects other than food (such as chemical products) may be used as objects. For example, a transfer means other than a conveyor (for example, a transfer robot, etc.) may be used.

In the above embodiment, the freezer is described as a linear type in which the front chamber 11, the freezer 5, and the rear chamber 12 are arranged in a straight line, but the freezer is not limited to this. For example, the freezer may be applied to a multi-layered type in which the positions of the front chamber 11 and the rear chamber 12 are changed from the straight type.

The technical scope of the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1, 101, 201, 301, 401... Freezer, 2... Freezer entrance, 3... Freezer exit, 4... Conveyor (transfer means), 5... Freezer, 6... Dehumidifier, 7... Entrance side suction duct, 8... Exit side Suction duct 9... Entrance side discharge duct 10... Exit side discharge duct 11... Front chamber 12... Rear chamber 30... Entrance side suction hood 31... Entrance side discharge hood 32... Exit side suction hood 33... Outlet-side discharge hood 40 Suction port 42 Suction-side current plate 42A Slit plate 43 Punch hole 43A Slit hole 50 Discharge port 52 Discharge-side current plate 54 Baffle plate 210 Inlet side branch duct 211 Outlet side branch duct 212 Decompression duct 220 Inlet side positive pressure valve 221 Outlet side positive pressure valve 222 Decompression valve 461 First dehumidifier 462 Second dehumidifier

Claims (28)

A freezer for freezing an object,
a freezer that has an opening through which the object can be carried in and out, and that freezes the object while transferring the object via transfer means;
a dehumidifier that removes moisture from the air;
a suction duct that draws in moist air that is about to enter the interior of the freezer through the opening and sends the moist air to the dehumidifier;
A discharge duct for sending dry air dehumidified by the dehumidifier to the inside of the freezer ,
A suction hood having a suction port is connected to the suction duct,
The freezer , wherein the suction port is wider than the opening . 2. The freezer of claim 1 , wherein said suction hood is positioned near said opening. 3. The freezer according to claim 1 , wherein said suction hood is box-shaped. 4. The freezer according to claim 3 , wherein the suction hood includes a suction side straightening plate for straightening the flow of moist air sucked from the suction port. 5. The freezer according to any one of claims 1 to 4 , wherein said suction port is positioned at the same height as said opening. 5. The freezer according to claim 4 , wherein the suction-side regulating plate is a punching plate having a plurality of punch holes provided on the entire surface thereof. 5. The freezer according to claim 4 , wherein the suction side current plate is a slit plate provided with a plurality of slit holes on the entire surface thereof. 8. The freezer according to any one of claims 1 to 7 , wherein a discharge hood having a discharge port is connected to said discharge duct. 9. The freezer according to claim 8 , wherein the discharge hood is arranged near the opening and further inside than the suction hood connected to the suction duct. 10. A freezer according to claim 8 or 9 , wherein said discharge hood is box-shaped. 11. The freezer according to claim 10, wherein said discharge hood includes a discharge-side regulating plate for rectifying the flow of dry air discharged from said discharge port. A freezer for freezing an object,
a freezer that has an opening through which the object can be carried in and out, and that freezes the object while transferring the object via transfer means;
a dehumidifier that removes moisture from the air;
a suction duct that draws in moist air that is about to enter the interior of the freezer through the opening and sends the moist air to the dehumidifier;
A discharge duct for sending dry air dehumidified by the dehumidifier to the inside of the freezer,
A suction hood having a suction port is connected to the suction duct,
A discharge hood having a discharge port is connected to the discharge duct,
The freezer , wherein the discharge port is wider than the opening. A freezer for freezing an object,
a freezer that has an opening through which the object can be carried in and out, and that freezes the object while transferring the object via transfer means;
a dehumidifier that removes moisture from the air;
a suction duct that draws in moist air that is about to enter the interior of the freezer through the opening and sends the moist air to the dehumidifier;
A discharge duct for sending dry air dehumidified by the dehumidifier to the inside of the freezer,
A suction hood having a suction port is connected to the suction duct,
A discharge hood having a discharge port is connected to the discharge duct,
The freezer , wherein the discharge port is positioned at the same height as the opening. 12. The freezer according to claim 11 , wherein the discharge-side regulating plate is a punching plate provided with a plurality of punch holes over its entire surface. 12. The freezer according to claim 11 , wherein the discharge-side straightening plate is a slit plate provided with a plurality of slit holes on the entire surface thereof. A freezer for freezing an object,
a freezer that has an opening through which the object can be carried in and out, and that freezes the object while transferring the object via transfer means;
a dehumidifier that removes moisture from the air;
a suction duct that draws in moist air that is about to enter the interior of the freezer through the opening and sends the moist air to the dehumidifier;
A discharge duct for sending dry air dehumidified by the dehumidifier to the inside of the freezer,
A suction hood having a suction port is connected to the suction duct,
A discharge hood having a discharge port is connected to the discharge duct,
A freezer , wherein the discharge hood further comprises a baffle plate for blocking a flow of dry air discharged from the discharge port. 17. The freezer according to claim 16 , wherein the baffle plate is inclined so that the flow direction of the dry air discharged from the discharge port is directed toward the interior of the freezer. 18. A freezer according to any one of claims 8 to 17 , wherein the suction hood and the discharge hood are adjacent to each other. 19. The freezer according to any one of claims 1 to 18 , further comprising a separate chamber arranged adjacent to the freezer and communicating with the inside of the freezer through the opening. 20. The freezer according to claim 19 , wherein said suction duct and said discharge duct are connected to said separate chamber. 20. The refrigerator further comprises a positive pressure valve that sends the dry air dehumidified by the dehumidifier into the freezer and makes the pressure inside the freezer positive pressure higher than the atmospheric pressure. Frieza according to any one of . A freezer for freezing an object,
a freezer that has an opening through which the object can be carried in and out, and that freezes the object while transferring the object via transfer means;
a dehumidifier that removes moisture from the air;
a suction duct that draws in moist air that is about to enter the interior of the freezer through the opening and sends the moist air to the dehumidifier;
a discharge duct for sending dry air dehumidified by the dehumidifier to the inside of the freezer;
A freezer, comprising: a decompression valve that sends air inside the freezer to the dehumidifier to decompress the inside of the freezer . 23. The freezer according to any one of claims 1 to 22, wherein a plurality of said dehumidifiers are provided. A freezer for freezing an object,
a freezer having a freezer entrance into which the object can be brought in and a freezer exit into which the object can be carried out, and freezing the object while transferring the object via a transfer means;
a dehumidifier that removes moisture from the air;
a front chamber disposed adjacent to the freezer, communicating with the inside of the freezer through the freezer inlet, and having a front chamber inlet into which moist air flows;
a rear chamber disposed adjacent to the freezer, communicating with the interior of the freezer through the freezer outlet, and having a rear chamber outlet through which moist air flows;
an entrance-side suction duct for sending moist air that is about to enter the front chamber through the front chamber inlet to the dehumidifier;
an exit-side intake duct for sending moist air, which is about to enter the rear chamber through the rear chamber outlet, to the dehumidifier;
an inlet-side discharge duct for sending dry air dehumidified by the dehumidifier to the front chamber;
an exit side discharge duct for sending dry air dehumidified by the dehumidifier to the rear chamber ,
A suction hood having a suction port is connected to at least one of the inlet side suction duct and the outlet side suction duct,
A freezer , wherein the suction port is wider than the corresponding front chamber inlet or rear chamber outlet . A freezer for freezing an object,
a freezer having a freezer entrance into which the object can be brought in and a freezer exit into which the object can be carried out, and freezing the object while transferring the object via a transfer means;
a dehumidifier that removes moisture from the air;
an entrance-side intake duct for sending moist air, which is about to enter the inside of the freezer through the freezer entrance, to the dehumidifier;
an exit-side intake duct for sending moist air, which is about to enter the inside of the freezer through the freezer outlet, to the dehumidifier;
an inlet-side discharge duct for sending dry air dehumidified by the dehumidifier to the interior of the freezer near the entrance of the freezer;
an exit-side discharge duct for sending dry air dehumidified by the dehumidifier to the inside of the freezer near the exit of the freezer,
A suction hood having a suction port is connected to at least one of the inlet side suction duct and the outlet side suction duct,
A freezer, wherein said inlet is wider than the corresponding width of said freezer inlet or said freezer outlet . A freezer for freezing an object,
a freezer having a freezer entrance into which the object can be brought in and a freezer exit into which the object can be carried out, and freezing the object while transferring the object via a transfer means;
a dehumidifier that removes moisture from the air;
a front chamber disposed adjacent to the freezer, communicating with the inside of the freezer through the freezer inlet, and having a front chamber inlet into which moist air flows;
a rear chamber disposed adjacent to the freezer, communicating with the interior of the freezer through the freezer outlet, and having a rear chamber outlet through which moist air flows;
an entrance-side suction duct for sending moist air that is about to enter the front chamber through the front chamber inlet to the dehumidifier;
an exit-side intake duct for sending moist air, which is about to enter the rear chamber through the rear chamber outlet, to the dehumidifier;
an inlet-side discharge duct for sending dry air dehumidified by the dehumidifier to the front chamber;
an outlet-side discharge duct for sending dry air dehumidified by the dehumidifier to the rear chamber;
an inlet-side branch duct branched from the inlet-side discharge duct and connected to the freezer;
an outlet-side branch duct branched from the outlet-side discharge duct and connected to the freezer;
an inlet-side positive pressure valve that sends dry air dehumidified by the dehumidifier into the freezer through the inlet-side branch duct to make the pressure inside the freezer higher than the atmospheric pressure;
an outlet-side positive pressure valve that sends dry air dehumidified by the dehumidifier to the inside of the freezer through the outlet-side branch duct to make the pressure inside the freezer positive pressure higher than atmospheric pressure ,
A suction hood having a suction port is connected to at least one of the inlet side suction duct and the outlet side suction duct,
A freezer , wherein the suction port is wider than the corresponding front chamber inlet or rear chamber outlet . A freezer for freezing an object,
a freezer having a freezer entrance into which the object can be brought in and a freezer exit into which the object can be carried out, and freezing the object while transferring the object via a transfer means;
a dehumidifier that removes moisture from the air;
a front chamber disposed adjacent to the freezer, communicating with the inside of the freezer through the freezer inlet, and having a front chamber inlet into which moist air flows;
a rear chamber disposed adjacent to the freezer, communicating with the interior of the freezer through the freezer outlet, and having a rear chamber outlet through which moist air flows;
an inlet-side discharge duct for sending dry air dehumidified by the dehumidifier to the front chamber;
an outlet-side discharge duct for sending dry air dehumidified by the dehumidifier to the rear chamber;
an inlet-side discharge hood connected to the inlet-side discharge duct;
an outlet-side discharge hood connected to the outlet-side discharge duct ,
The freezer is characterized in that at least one of the inlet-side discharge hood and the outlet-side discharge hood has a width larger than the width of the corresponding front chamber inlet or rear chamber outlet . A freezer for freezing an object,
a freezer having a freezer entrance into which the object can be brought in and a freezer exit into which the object can be carried out, and freezing the object while transferring the object via a transfer means;
a first dehumidifier for removing moisture in the air;
A second dehumidifier provided independently from the first dehumidifier;
a front chamber disposed adjacent to the freezer, communicating with the inside of the freezer through the freezer inlet, and having a front chamber inlet into which moist air flows;
a rear chamber disposed adjacent to the freezer, communicating with the interior of the freezer through the freezer outlet, and having a rear chamber outlet through which moist air flows;
an entrance-side suction duct for sending moist air about to enter the front chamber through the front chamber inlet to the first dehumidifier;
an exit-side intake duct for sending moist air about to enter the rear chamber through the rear chamber outlet to the second dehumidifier;
an inlet-side discharge duct for sending dry air dehumidified by the first dehumidifier to the front chamber;
an outlet side discharge duct for sending dry air dehumidified by the second dehumidifier to the rear chamber ,
A suction hood having a suction port is connected to at least one of the inlet side suction duct and the outlet side suction duct,
A freezer , wherein the suction port is wider than the corresponding front chamber inlet or rear chamber outlet .

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