JP2007218493A - Agricultural product low-temperature storage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an agricultural product low-temperature storage having mainly approximately 1 to 3 Tsubo capable of being easily carried, installed and served by one person. <P>SOLUTION: A plurality of small and light cooling units is combined to cool the storage. Thereby, the agricultural product low-temperature storage 20 having mainly approximately 1 to 3 Tsubo can be easily carried, installed or served even only by one person. The plurality of the cooling units are individually controlled, whereby the inside of a storage chamber 21 can be maintained in a further delicate temperature atmosphere. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an agricultural product low-temperature storage mainly of about 1 to 3 tsubo used for storing and storing brown rice, vegetables, petals and the like.

  As a thing regarding the conventional agricultural-product low-temperature storage, there exists patent document 1, for example.

  Hereinafter, the conventional agricultural product low-temperature storage will be described with reference to the drawings. FIG. 7 is a front view of a conventional agricultural product low-temperature storage. In FIG. 7, 1 is a storage room, 2 is a cooling unit arrange | positioned at the top of the storage room. FIG. 8 is a top view of a cooling unit of a conventional agricultural product low-temperature storage. In FIG. 8, the cooling unit 2 includes a cooling chamber 3 having a cooler 5 and a cooler fan 6 inside the heat insulator 4, a machine room 7 having a compressor 9, a radiator 10, and a radiator fan 11, And a control panel 8 for controlling the cooling unit 2.

  The operation of the agricultural product low-temperature storage configured as described above will be described below.

  The inside of the storage room 1 of the agricultural product low-temperature storage is cooled by introducing the cool air cooled by the cooler 5 of the cooling unit 2 by the cooler blower 6. When the storage chamber is cooled to a predetermined temperature, the control panel 8 repeats the start / stop operation of the compressor 9. Further, as the operation time elapses, moisture condenses on the surface of the cooler 5 and gradually accumulates as frost. When the amount of frost adhering to the cooler 5 increases, a defrosting operation is performed at an appropriate time.

  Here, in general, in the agricultural product low-temperature storage mainly up to about 1 tsubo, the cooling unit 2 is relatively small and light, and most of the operations such as installation work and service replacement can be simplified by one person.

  On the other hand, in the low temperature storage of agricultural products of approximately 3 tsubo or more, the strength of the storage body is required when the cooling unit necessary for cooling a large storage is placed on the top of the storage room. 3 and the machine room 7 were separated, and the floor of the machine room 7 was mainly a cooling unit, and piping work was required at the time of construction, which required labor and labor.

Moreover, when it comes to the agricultural product low temperature storage of about 1 to 3 tsubos, the large type of the cooling unit 2 was mainstream.
JP 2003-343968 A

  However, in the above conventional configuration, when it comes to a low temperature storage of about 1 to 3 tsubo agricultural products, the cooling unit is large, and because it is heavy, it cannot be transported and installed by itself, and installation work by multiple people And has to be serviced, and has the problem of being labor intensive.

  This invention solves the said conventional subject, and it aims at providing the agricultural-product low temperature store | warehouse | chamber mainly of about 1 to 3 tsubo which can perform installation construction and service easily even by one person.

  In order to solve the above conventional problem, the agricultural product low-temperature storage of the present invention includes a plurality of cooling units.

  As a result, even if it is an agricultural product low-temperature storage of about 1 to 3 tsubo, one person can easily perform installation work and service.

  Even if it is a low-temperature storage of agricultural products of about 1 to 3 tsubo, it can be easily installed and serviced by one person. Furthermore, by controlling each of the plurality of cooling units independently, the storage chamber can be maintained in a finer temperature atmosphere.

  The invention according to claim 1 of the present invention includes a storage chamber, a cooler disposed on the top surface of the storage chamber, a blower for cooler, a compressor, a radiator, a blower for radiator, and a temperature control thermistor in the storage chamber. And a controller that controls the cooling unit. By providing a plurality of the cooling units, a small and lightweight cooling unit that is generally up to approximately 1 tsubo is used. Can be transported, installed, and serviced.

  The invention according to claim 2 of the present invention is the invention according to claim 1, wherein when one of the plurality of cooling units is in a cooling operation, the remaining cooling units of the plurality of cooling units. By operating at least one of the cooler fans, the temperature unevenness in the cabinet can be suppressed.

  According to a third aspect of the present invention, in the first aspect of the present invention, when one of the plurality of cooling units is in a defrosting operation, the remaining cooling of the plurality of cooling units is performed. By cooling the operation of at least one of the units, it is possible to suppress the temperature rise in the warehouse.

  According to a fourth aspect of the present invention, in the first aspect, the plurality of cooling units are sequentially cooled so that one of the plurality of cooling units does not operate with priority. By operating, the lifetime of each cooling unit can be extended.

  According to a fifth aspect of the present invention, in the first aspect of the present invention, the compressor is started with a time lag so that the plurality of cooling units do not operate at the same time. The cooling unit can be stably operated even under installation conditions where the supply voltage is low and the drop is suppressed.

(Embodiment 1)
FIG. 1 is a configuration diagram of an agricultural product low-temperature storage in Embodiment 1 of the present invention. FIG. 2 is a relationship diagram of control inputs and outputs of the agricultural product low-temperature storage in the embodiment. FIG. 3 is a top plan view of the agricultural product low-temperature storage in the embodiment.

  In the present embodiment, an agricultural product low-temperature storage having two cooling units will be described as an example.

  In FIGS. 1 and 2, 20 is an agricultural product low-temperature storage, 21 is a storage room, 22 and 23 are first cooling units disposed on the upper surface of the storage room 21, and second cooling units 24a and 24b are first ones, respectively. The temperature control thermistor of the first cooling unit, the temperature control thermistor of the second cooling unit, 25 are input information of the temperature control thermistor 24a of the first cooling unit and the temperature control thermistor 24b of the second cooling unit. It is a control controller which controls the 1st cooling unit 22 and the 2nd cooling unit 23 based on this.

  In FIG. 3, 26 is a cooler of the first cooling unit 22, 27 is a fan for the cooler of the first cooling unit 22, 28 is a compressor of the first cooling unit 22, and 29 is a compressor of the first cooling unit 22. A radiator, 30 is a fan for the radiator of the first cooling unit 22, 31 is a cooler for the second cooling unit 23, 32 is a fan for the cooler of the second cooling unit 23, and 33 is a fan of the second cooling unit 23 The compressor 34 is a radiator of the second cooling unit 23, and 35 is a fan for the radiator of the second cooling unit 23.

  The agricultural product low-temperature storage configured as described above will be described below.

  As shown in FIG. 2, the agricultural product low temperature storage 20 is a storage room detected by a temperature adjusting thermistor 24 a of the first cooling unit and a temperature adjusting thermistor 24 b of the second cooling unit arranged in the storage room 21. 21 temperature information is input to the controller 25. First, the operation of the first cooling unit 22 is started from the temperature information input to the controller 25. Here, when the outside air load or the internal load is so high that the temperature of the storage chamber 21 cannot be adjusted only by the operation of the first cooling unit 22, the temperature information of the temperature adjustment thermistor 24b of the second cooling unit is obtained. However, the additional operation of the second cooling unit 23 starts. When the storage chamber 21 reaches a predetermined temperature, the start / stop operation and the defrosting operation of the first cooling unit 22 and the second cooling unit 23 are repeated as in the conventional cooling unit. In addition, since the temperature information of the storage chamber 21 can be obtained with a plurality of temperature adjustment thermistors, the temperature in the storage chamber can be more precisely controlled, and further, for example, for temperature adjustment of the first cooling unit Even when the thermistor 24a is short-circuited or opened, there is an advantage that the first cooling unit 22 can be operated quickly based on the temperature information of the temperature adjusting thermistor 24b of the second cooling unit.

  As described above, the storage chamber 21 is cooled by the first cooling unit 22 and the second cooling unit 23, but generally uses a small and lightweight cooling unit of approximately 1 tsubo. The unit 22, the second cooling unit 23 can be transported, installed and serviced alone.

  In the present embodiment, the number of cooling units is two. However, the same effect can be obtained with a larger number of cooling units.

  Further, when a conventional large-sized heavy-weight cooling unit is disposed at the center of the top surface of the storage chamber 21, it is necessary to increase the strength of the storage chamber 21, such as increasing the wall thickness of the top surface of the storage chamber 21. However, in the present embodiment, the first cooling unit 22 and the second cooling unit 23 are arranged diagonally at the corners of the top surface of the storage chamber 21 so as to be directly on the top surface of the storage chamber 21. It can be placed, the concern about strength is reduced, and the workability at the time of installation at a high place becomes easier.

  When the inside of the storage chamber 21 is cooled by a single cooling unit as in the prior art, there is a portion where the circulation of the cold air does not reach the corner of the storage chamber 21, and the temperature in the storage chamber 21 is uneven. However, in the present embodiment, a plurality of cooling units, for example, two cooling units are arranged diagonally at the corners of the top surface of the storage chamber 21, and the cooling fan is also mounted on the top surface of the storage chamber 21. The cooling air is sent into the storage chamber 21 by arranging it diagonally at the corners of the, and the cooling air circulation in the storage chamber 21 becomes smoother, and the temperature is adjusted by the temperature adjusting thermistor arranged in each cooling unit. By managing, it is possible to create a storage atmosphere in which the temperature in the storage chamber 21 is not uneven.

(Embodiment 2)
FIG. 4 is a time chart of the agricultural product low-temperature storage in Embodiment 2 of the present invention.

  Since the conventional agricultural low-temperature storage cools the inside of the storage room 1 with the cold air of one direction blown from one cooling unit arrange | positioned in the center of the storage top, the more the storage room 1 becomes large capacity | capacitance. In particular, temperature unevenness can occur at the corners in the cabinet where the cold air blown out by the cooling unit does not reach.

  In the present embodiment, since the interior of the storage chamber 21 is cooled by a plurality of cooling units, the direction of the cold air can be changed by the number of cooling units installed by the arrangement of the cooling units. Since the circulation is improved and each of the plurality of cooling units has a temperature adjusting thermistor, the temperature unevenness in the storage chamber 21 can be reduced.

  For example, as shown in FIG. 4, even when only the first cooling unit 22 is operated, only the cooler blower 32 of the second cooling unit is operated while the compressor 33 of the second cooling unit 23 is stopped. By doing so, the circulation of the cold air in the storage chamber can be improved, and the temperature unevenness in the storage chamber 21 can also be reduced.

(Embodiment 3)
FIG. 5 is a time chart of the agricultural product low-temperature storage in Embodiment 3 of the present invention.

  The conventional cooling unit 2 repeats the start / stop operation of the compressor 9 by the control panel 8 when the inside of the storage chamber 1 is cooled to a predetermined temperature. Further, as the operation time elapses, moisture condenses on the surface of the cooler 5 and gradually accumulates as frost. When the amount of frost adhering to the cooler 5 increases, a defrosting operation is performed at an appropriate time. During this defrosting, the operation of the compressor 9 is stopped and the supply of cold air to the storage chamber is stopped, so that the temperature inside the warehouse rises. Since this defrosting generally takes about 10 to 30 minutes, the temperature rises particularly when the outside air load is high, such as in summer, and has been harmful to storage of vegetables and the like that are sensitive to temperature changes.

  In the present embodiment, for example, as shown in FIG. 5, defrosting is necessary because the cooler 26 is frosted during the cooling operation of the storage chamber 21 with the first cooling unit 22 and the second cooling unit 23. Even in this case, only the first cooling unit 22 is defrosted, and the second cooling unit 23 continues to perform the cooling operation, thereby minimizing the temperature rise in the storage chamber 21. Even in the case of stored items that are sensitive to temperature changes, such as vegetables, an optimum temperature atmosphere in the storage chamber can be created.

(Embodiment 4)
FIG. 6 is a time chart of the agricultural product low-temperature storage in Embodiment 4 of the present invention.

  The conventional cooling unit selects a unit that has sufficient cooling capacity even under high load conditions such as in summer, so the set temperature in the cabinet can be set under low load conditions such as in winter or long-term storage such as brown rice. There was a period when the cooling capacity was excessive in the storage of highly stored items. Therefore, the operation of the cooling unit is an inefficient operation with a very short operation time of the compressor.

  In this embodiment, since the number of cooling units can be selected according to the load, in storage such as storage items with a high internal set temperature in long-term storage such as brown rice or under low load conditions such as winter season Capability adjustment such as driving only one unit is possible. At this time, the lifetime of each cooling unit can be extended by rotating the cooling unit so that only a specific cooling unit does not have a long operating time.

  For example, as shown in FIG. 6, after the first cooling unit 22 is operated for a predetermined time, the second cooling unit 23 is forcibly preferentially operated. Further, when the second cooling unit 23 has been operated for a predetermined time, the first cooling unit 22 is preferentially operated again and rotated. As a result, it is possible to obtain an effect of reducing contact welding due to the high frequency of starting and stopping, which has occurred in conventional agricultural product low-temperature storages that frequently repeat starting and stopping operations, and noise at startup.

  Furthermore, when the internal load in the storage chamber 21 decreases, the interior of the storage chamber 21 is divided into a room for the first cooling unit 22 and a second cooling unit 23, thereby providing a single housing. Since it has a plurality of storage chambers and the temperature setting can be managed individually, it is possible to simultaneously store stored items such as brown rice and vegetables that cannot normally be stored at the same time.

(Embodiment 5)
In general, the cooling unit of agricultural low-temperature storage that exceeds 1 tsubo has a large compressor capacity, so the voltage drop at the start-up of the compressor is also large. In installation environments with poor power supply conditions, the voltage drop occurs when the load is high, such as in summer. May cause startup failure, cooling failure and compressor failure.

  In this embodiment, since the cooling unit mounted at about 1 tsubo or less is used, the compressor has a smaller capacity than the conventional one. Therefore, even in an installation environment where the power supply situation is bad, the load in summer is high. Sometimes it is difficult to cause voltage drop. Furthermore, when the other cooling units are additionally activated, the storage chamber is cooled, so that the internal load is reduced, the compressor can be easily activated, and the burden on the cooling unit can be reduced.

  As described above, the agricultural product low-temperature storage of the present invention can be easily transported, installed, and serviced by itself even if it is an agricultural product low-temperature storage of about 1 to 3 tsubo. Furthermore, by controlling each of the plurality of cooling units independently, the storage chamber can be maintained in a finer temperature atmosphere.

Configuration diagram of agricultural product low-temperature storage in Embodiment 1 of the present invention Relationship diagram of inputs and outputs of agricultural product cold storage in the same embodiment Top view layout of agricultural product low temperature storage of the same embodiment Time chart of agricultural product low temperature storage in Embodiment 2 of the present invention Time chart of agricultural product low-temperature storage in Embodiment 3 of the present invention Time chart of agricultural product low temperature storage in Embodiment 4 of the present invention Front view of conventional agricultural low-temperature storage Top view of a conventional cooling unit for agricultural low-temperature storage

Explanation of symbols

20 Agricultural Products Low Temperature Storage Room 21 Storage Room 22 First Cooling Unit 23 Second Cooling Unit 24a Temperature Control Thermistor 24b Temperature Control Thermistor 25 Controller 26 Cooler for First Cooling Unit 27 Cooler for First Cooling Unit Blower 28 Compressor of first cooling unit 29 Radiator of first cooling unit 30 Blower for radiator of first cooling unit 31 Cooler of second cooling unit 32 Blower for cooler of second cooling unit 33 First Compressor of cooling unit 2 34 Radiator of second cooling unit 35 Blower for radiator of second cooling unit

Claims (5)

  A storage unit, a cooling unit disposed on the top of the storage unit, a cooling fan, a compressor, a radiator, a radiator fan, and a temperature control thermistor in the storage chamber, and the cooling unit is controlled. An agricultural product low-temperature storage comprising a plurality of the cooling units.   The at least one cooler blower of the remaining cooling units among the plurality of cooling units is operated when one of the plurality of cooling units is in a cooling operation. Agricultural product cold storage.   2. The agricultural product according to claim 1, wherein at least one of the remaining cooling units among the plurality of cooling units is cooled during the defrosting operation of the plurality of cooling units. Cold storage.   The agricultural product low-temperature storage according to claim 1, wherein the plurality of cooling units are sequentially cooled so that one of the plurality of cooling units is not preferentially operated.   The agricultural product low-temperature storage according to claim 1, wherein the compressor is started with a time lag so that the plurality of cooling units do not operate simultaneously.

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