JP4954230B2 - Dry storage system - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a dry storage system that dries in a state in which a storage product such as onion and garlic is stored in a warehouse and stores it at a low temperature after drying.

Conventionally, as this kind of dry storage system, for example, the one described in Patent Document 1 (Japanese Patent Laid-Open No. 7-127975) is known.
As shown in FIG. 8, the dry storage system Sa cools the gas refrigerant discharged from the compressor 1 that is provided outside the warehouse W and discharged from the compressor 1 through the main discharge path 10 to condense and liquefy. The external condenser 2 to be received, the liquid receiver 3 that receives the gas refrigerant condensed in the external condenser 2, the expansion valve 4 that can adjust the opening for injecting the gas refrigerant from the liquid receiver 3, and the warehouse The inside of the warehouse W provided in the W is taken in, cooled by heat exchange with the gas refrigerant injected from the expansion valve 4 and blown out into the warehouse W, and the gas refrigerant whose temperature has been raised by heat exchange is sent to the compressor 1. The cooler 5 and the blown air blown out from the cooler 5 provided in the warehouse W are taken in and heated in the warehouse by heat exchange with the gas refrigerant discharged from the compressor 1 through the first discharge path 11. First condenser 6 to blow out and inside warehouse W The inside of the warehouse which is provided and is further heated by heat exchange with the gas refrigerant discharged from the compressor 1 through the second discharge path 12 by taking in the blown air blown out from the first condenser 6 in the warehouse and blown out into the warehouse W The second condenser 7 is provided.

The first discharge path 11 is branched from the main discharge path 10, and the main discharge path 10 is opened and closed at the branch point between the main discharge path 10 and the first discharge path 11, and the first discharge path 11 is opened. A three-way valve 30 that opens and closes is interposed. The three-way valve 30 includes an inlet 31 through which the gas refrigerant from the compressor 1 enters through the main discharge path 10, and an outlet 32 that sends the gas refrigerant from the inlet 31 to the outside condenser 2 through the main discharge path 10. And the other outlet 33 for sending the gas refrigerant that has entered from the inlet 31 to the first internal condenser 6 and / or the second internal condenser 7 through the first discharge path 11. Further, the second discharge path 12 is branched from the first discharge path 11, and an opening / closing valve 40 that opens and closes the second discharge path 12 is provided in the second discharge path 12. Further, a first outflow path 13 for flowing out the gas refrigerant condensed by heat exchange in the in-compartment first condenser 6 is connected to the liquid receiver 3 through the common path 15. A second outflow path 14 for flowing out the gas refrigerant condensed by the heat exchange is connected to the liquid receiver 3 through the common path 15.
The three-way valve 30 and the on-off valve 40 are opened and closed to control the first condenser 6 and the second condenser 7 to be valid or invalid, and at least the first condenser 6 is valid. A control unit (not shown) for performing control to close the one outlet 32 of the three-way valve 30 is sometimes provided.

  When using the dry storage system Sa to dry the stored items while storing the stored items in the warehouse W and store them at a low temperature, the following is performed. First, when drying with this dry storage system Sa, the controller (not shown) controls the opening and closing of the three-way valve 30 and the opening / closing valve 40, and the compressor 1 → external condenser 2 → liquid receiver 3 → Path of expansion valve 4 → cooler 5, compressor 1 → first condenser 6 → receiver 3 → expansion valve 4 → path of cooler 5, compressor 1 → first condenser 6 and warehouse This is performed by selecting one of the three paths of the inner second condenser 7 → the liquid receiver 3 → the expansion valve 4 → the cooler 5. In this case, when the in-compartment first condenser 6 and the in-compartment second condenser 7 are enabled, the cool air from the cooler 5 is reheated and the temperature is adjusted. In this conventional dry storage system Sa, the temperature in the warehouse is adjusted in the range of 10 ° C to 30 ° C.

  Next, when storing the contents after drying using the dry storage system Sa, the control unit (not shown) opens the one outlet 32 of the three-way valve 30 and closes the other outlet 33. The on-off valve 40 is closed, and only the path of the compressor 1 → the external condenser 2 → the liquid receiver 3 → the expansion valve 4 → the cooler 5 is made effective.

JP-A-7-127975

However, in this conventional dry storage system Sa, although the gas refrigerant is cooled and condensed by the internal first condenser 6 and / or the internal second condenser 7, the gas refrigerant is condensed once. Therefore, since this gas refrigerant is relatively high temperature and the first outflow path 13 and the second outflow path 14 are connected to the liquid receiver 3, this relatively high temperature gas refrigerant directly enters the liquid receiver 3. Since this gas refrigerant is sent to the cooler 5, the heat exchange efficiency in the cooler 5 is lowered and the cooling effect is lowered, so that the warehouse W is not sufficiently cooled. Therefore, there is a problem that the dehumidifying effect in the warehouse W cannot be sufficiently obtained, and the contents are not sufficiently dried and stored.
In order to eliminate this, that is, in order to lower the temperature of the gas refrigerant entering the liquid receiver 3, both the outlet 32 and the outlet 33 of the three-way valve 30 are opened, and the external condenser 2 and the warehouse Although it is conceivable to condense the gas refrigerant in two systems with the inner first condenser 6 and / or the second internal condenser 7, the gas refrigerant is dispersed in two systems, so the flow rate of the gas refrigerant decreases. Therefore, there is a disadvantage that the reheating effect in the in-compartment first condenser 6 and / or the in-compartment second condenser 7 is reduced.

  The present invention has been made in view of such problems, and the temperature of the gas refrigerant is made as low as possible even if reheating is performed in the first condenser and the second condenser in the warehouse. To provide a dry storage system capable of being sent to a cooler, improving the cooling effect in the cooler, and improving the dehumidifying effect so that the contents can be dried and stored more reliably. With the goal.

  In order to achieve such an object, the dry storage system of the present invention discharges gas refrigerant in a dry storage system that dries in a state in which the contents stored in the warehouse are stored in the warehouse and stores them at a low temperature after drying. A compressor that is provided outside the warehouse, cools the gas refrigerant discharged from the compressor through the main discharge path, and condenses and liquefies, and receives the gas refrigerant condensed and liquefied by the outside condenser Heat exchange between a liquid receiver, an expansion valve capable of adjusting the opening for injecting the gas refrigerant from the liquid receiver, and the gas refrigerant provided in the warehouse and taking in the inside air in the warehouse and injected from the expansion valve A cooler that cools the air and blows it into the warehouse and sends the gas refrigerant whose temperature has been raised by the heat exchange to the compressor, and takes in the blown air that is provided in the warehouse and blown from the cooler. one A first condenser in the warehouse that is heated by heat exchange with the gas refrigerant discharged through the outlet path and blows out into the warehouse, and the blowout air that is provided in the warehouse and blown out from the first condenser in the warehouse is taken in A second condenser in the warehouse for further heating by heat exchange with the gas refrigerant discharged from the compressor through the second discharge path and blowing out into the warehouse, and opens and closes the main discharge path in the main discharge path A main discharge path opening / closing valve is interposed, the first discharge path is branched from the main discharge path opening / closing valve of the main discharge path, and the first discharge path is opened and closed with the first discharge path. A first discharge path opening / closing valve is provided, the second discharge path is branched from the main discharge path opening / closing valve of the main discharge path, and the second discharge path is opened and closed by the second discharge path. Two discharge path opening / closing valve is provided, and the heat in the first condenser in the cabinet is A gas refrigerant condensed by heat exchange in the internal second condenser, wherein a first outflow path through which the gas refrigerant condensed by the exchange flows out is connected to the downstream side of the main discharge path on-off valve of the main discharge path. Is connected downstream of the main discharge path opening / closing valve of the main discharge path, and the gas refrigerant flowing out of the first internal condenser and the second internal condenser is condensed outside the container. The condenser is cooled and condensed, and the first discharge path on-off valve and the second discharge path on-off valve are opened and closed to enable or disable the first internal condenser and the second internal condenser. In addition, at least when the first condenser in the warehouse is valid, a control unit that performs control to close the main discharge path on-off valve is provided.

As a result, the control unit closes the first discharge path on-off valve and the second discharge path on-off valve and opens the main discharge path on-off valve (compressor → external condenser → liquid receiver → expansion valve → Cooler path effective) and control to open the first discharge path on / off valve and the second discharge path on / off valve and close the main discharge path on / off valve (compressor → first in-compartment chamber and second in the chamber) Condenser → external condenser → receiver → expansion valve → cooler path effective), open the first discharge path on / off valve and close the second discharge path on / off valve One of the control to be closed (compressor → first condenser in the interior → condenser outside the compartment → receiver → expansion valve → effective passage of the cooler) is selectively performed. That is, the control unit performs a cooling operation in which the first discharge path on / off valve and the second discharge path on / off valve are closed and the main discharge path on / off valve is opened, and the control unit has the first discharge path on / off valve and the second discharge path on / off valve. Control to open the discharge path on / off valve and close the main discharge path on / off valve, or open the first discharge path on / off valve and close the second discharge path on / off valve to close the main discharge path on / off valve One of the reheating operations for performing the closing control is selectively performed. By repeatedly performing the cooling operation and the reheating operation, the stored item is dried in a state where the stored item is stored in the warehouse, and thereafter, the stored state is set.
In this case, in the reheating operation, the gas refrigerant from the first condenser in the warehouse and the second condenser in the warehouse is always further condensed through the condenser outside the warehouse. The gas refrigerant can be sent to the cooler so that its temperature is as low as possible even if the second condenser and the second condenser in the cabinet are reheated, so that the cooling effect in the cooler is improved. In addition, the dehumidifying effect is improved, and the contents are more reliably dried and stored.

  Specifically, first, the control unit closes the first discharge path on-off valve and the second discharge path on-off valve to invalidate the in-compartment first condenser and the in-compartment second condenser and to turn off the main discharge path on-off valve. The case where the cooling operation is performed will be described. When the compressor is operated and gas refrigerant is discharged from the compressor through the main discharge path, the discharged gas refrigerant passes through the main discharge path opening / closing valve. Is sent to the condenser outside the warehouse, where it is cooled by heat exchange with the outside air outside the warehouse to be condensed and liquefied, then sent to the receiver to reach the expansion valve, injected from the expansion valve, and then cooled Sent to. At this time, the opening degree of the expansion valve is adjusted appropriately, and the temperature of the gas refrigerant injected from the expansion valve is adjusted. In this cooler, the inside air in the warehouse is taken in and exchanged heat with the gas refrigerant. By this heat exchange, the inside air is cooled and blown out into the warehouse, thereby cooling the inside of the warehouse. Further, the gas refrigerant whose temperature has been raised by heat exchange with the inside air in the warehouse by the cooler is sent to the compressor, discharged from the compressor, and circulated in the same cycle as described above. When the gas refrigerant is circulated in this manner, the inside of the warehouse is cooled and the temperature in the warehouse is lowered.

  Next, the control unit opens the first discharge path on-off valve and the second discharge path on-off valve to enable the in-compartment first condenser and the in-compartment second condenser, and closes the main discharge path on-off valve. The case where the reheating operation is performed will be described. The gas refrigerant sent from the cooler to the compressor and discharged from the compressor through the main discharge path passes through the first discharge path and the second discharge path branched from the main discharge path. And is sent to the first condenser in the cabinet through the first discharge path on-off valve and sent to the second condenser in the warehouse through the second discharge path on-off valve. In the first condenser, the blown air blown from the cooler is taken in and exchanged heat with the gas refrigerant from the compressor, and by this heat exchange, the blown air is reheated and blown into the warehouse. In addition, the gas refrigerant cooled and condensed by heat exchange with the air blown from the cooler in the first internal condenser passes through the first outflow path and reaches the main discharge path downstream from the main discharge path opening / closing valve. Sent to the outside condenser. In the second condenser, the blown air blown from the first condenser is taken in and exchanged heat with the gas refrigerant from the compressor, and this heat exchange further reheats the blown air and blows it into the warehouse. Is done. In addition, the gas refrigerant cooled and condensed by heat exchange with the air blown out from the first condenser in the warehouse through the second condenser in the warehouse passes through the second outflow path and is discharged from the main discharge path on / off valve downstream. It reaches the path, merges with the gas refrigerant cooled and condensed by the first internal condenser, and is sent to the external condenser. In the outside condenser, the gas refrigerant cooled and condensed by the first inside condenser and the second inside condenser is further cooled and condensed by exchanging heat with outside air outside the warehouse. Then, it is sent to the liquid receiver, reaches the expansion valve, is injected from the expansion valve, and is sent to the cooler. Since the gas refrigerant once cooled and condensed in the internal first condenser and the internal second condenser is further cooled and condensed by the external condenser, the gas refrigerant entering the receiver is at a lower temperature than the conventional one. .

  Next, the control unit opens the first discharge path on-off valve to enable the internal first condenser, and closes the second discharge path on-off valve to disable the internal second condenser and to discharge the main discharge The case of performing the reheating operation with the path opening / closing valve closed will be described. The gas refrigerant sent from the cooler to the compressor and discharged from the compressor through the main discharge path is a first discharge path branched from the main discharge path. Through the first discharge path opening / closing valve and sent to the first condenser in the warehouse. The gas refrigerant sent to the internal first condenser flows as described above, and is sent to the external condenser. In the outside condenser, the gas refrigerant cooled and condensed by the first inside condenser is further cooled and condensed by exchanging heat with outside air outside the warehouse. Then, it is sent to the liquid receiver, reaches the expansion valve, is injected from the expansion valve, and is sent to the cooler. Since the gas refrigerant once cooled and condensed by the internal first condenser is further cooled and condensed by the external condenser, the gas refrigerant entering the liquid receiver is at a lower temperature than the conventional one.

  As described above, when drying the contents with the contents stored in the warehouse using this dry storage system, the control unit varies the circulation path of the gas refrigerant, and the cooling operation and the reheating operation are appropriately performed. Is repeatedly performed to dehumidify the inside of the warehouse, whereby the contents stored in the warehouse can be dried smoothly. In addition, when using the dry storage system to store the stored items at a low temperature after drying with the stored items stored in the warehouse, the control unit appropriately performs a cooling operation and a restart so as to keep the warehouse at a low temperature. Switch between heating operation and store.

  As described above, in the dry storage system of the present invention, the gas refrigerant once cooled and condensed by the internal first condenser and / or the internal second condenser is further cooled and condensed by the external condenser, and then received. That is, the first condenser in the warehouse and the condenser outside the warehouse are provided in the same circulation path in series, and both the second condenser in the warehouse and the condenser outside the warehouse are provided in the same circulation path in series. Therefore, the temperature of the gas refrigerant entering the receiver is lower than that of the conventional case, and the temperature of the gas refrigerant can be kept as low as possible even when the first condenser in the warehouse and / or the second condenser in the warehouse is reheated. Since it can be sent to the cooler at a low temperature, the heat exchange efficiency in the cooler is improved and the cooling effect is improved, so that the warehouse is sufficiently cooled. It can only improve the dehumidifying effect in the warehouse, It can be subjected to the storage more reliably.

  And, if necessary, the control unit switches the mode from a drying mode for drying the contents to a storage mode for storing the contents at a low temperature, and the temperature in the warehouse becomes the first set temperature TA in the drying mode. The first discharge path on-off valve and the second discharge path on-off valve are opened and closed to enable or disable the first internal condenser and the second internal condenser, and at least the first internal compartment A drying control means for controlling the main discharge path opening / closing valve to be closed when the condenser is effective, and the temperature in the warehouse at the storage mode becomes a second set temperature TB lower than the first set temperature TA, and Enable or disable the first condenser in the warehouse and the second condenser in the warehouse by opening and closing the first discharge path on-off valve and the second discharge path on-off valve so that the humidity in the warehouse is lower than the set humidity H. At least the chamber in the first condenser performs a control to constitute and a storage control means for performing control to close the main discharge passage open-close valve when enabled.

  Thus, the control unit first enters the drying mode and performs the drying control means. In this drying control means, since the cooling operation and the reheating operation are switched so that the warehouse temperature becomes the first set temperature TA, the warehouse temperature can always be kept near the first set temperature TA. Since the switching between the cooling operation and the reheating operation is automatically performed only by setting the first set temperature TA, the switching between the cooling operation and the reheating operation can be easily performed. Then, after the contents are dried, the storage control means is performed by switching from the drying mode to the storage mode by the mode switching means. In this storage control means, the cooling operation and the reheating operation are switched so that the warehouse temperature becomes the second set temperature TB and the warehouse humidity becomes the set humidity H or less. It can always be kept near the second set temperature TB, and the humidity in the warehouse can be kept below the set humidity H. In addition, since the switching between the cooling operation and the reheating operation is automatically performed only by setting the second set temperature TB and the set humidity H, the switching between the cooling operation and the reheating operation is easily performed. be able to. That is, since the mode switching means automatically switches from the drying mode to the storage mode, drying and storage can be performed easily and reliably. Further, in the storage mode, the control is performed in consideration of the humidity in the warehouse, so that the storage environment can be kept extremely good.

  Further, if necessary, the drying control means closes the first discharge path on-off valve and the second discharge path on-off valve when the warehouse temperature is higher than the first set temperature TA, and stores the first in the warehouse. Disabling the condenser and the second internal condenser and opening the main discharge path on / off valve, and when the warehouse temperature is lower than the first set temperature TA, the first discharge path on / off valve and the second discharge Control is made to open the path opening / closing valve to enable the first internal condenser and the second internal condenser and to close the main discharge path opening / closing valve.

  As a result, when the warehouse temperature is higher than the first set temperature TA, the first discharge path on-off valve and the second discharge path on-off valve are closed, the main discharge path on-off valve is opened, and the cooling operation is performed. The warehouse is cooled, and the temperature is lowered so that the temperature in the warehouse becomes the first set temperature TA. When the warehouse temperature is lower than the first set temperature TA, the first discharge path on / off valve and the second discharge path on / off valve are opened, the main discharge path on / off valve is closed, and the reheating operation is performed. The temperature in the warehouse is set to the first set temperature TA. That is, the temperature in the warehouse can always be kept near the first set temperature TA, and the switching between the cooling operation and the reheating operation can be automatically performed only by setting the first set temperature TA. Switching between the cooling operation and the reheating operation can be easily performed. In addition, when drying the contents, it is desirable to keep the temperature in the warehouse at a certain level, so the first set temperature TA is set at a certain level, but the first condenser in the warehouse and the second condenser in the warehouse Since this is effective, the temperature in the warehouse can be set to an appropriate temperature.

  Further, if necessary, the storage control means closes the first discharge path on-off valve and the second discharge path on-off valve when the warehouse temperature is higher than the second set temperature TB, and When the condenser and the second condenser in the warehouse are disabled and the main discharge path on-off valve is opened, the warehouse temperature is lower than the second set temperature TB and the warehouse humidity is higher than the set humidity H. One discharge path opening / closing valve is opened to enable the first internal condenser, and the second discharge path opening / closing valve is closed to disable the second internal condenser, and the main discharge path opening / closing valve is When the warehouse temperature is lower than the second set temperature TB and the warehouse humidity is equal to or lower than the set humidity H, the first discharge path on / off valve and the second discharge path on / off valve are closed and the first in the warehouse is closed. Disabling the condenser and the second condenser in the cabinet and the main discharge The road-off valve is configured to perform a control to close.

  As a result, when the temperature in the warehouse is higher than the second set temperature TB, the first discharge path on-off valve and the second discharge path on-off valve are closed, the main discharge path on-off valve is opened, and the cooling operation is performed. The warehouse is cooled, and the temperature is lowered so that the temperature in the warehouse becomes the second set temperature TB. When the warehouse temperature is lower than the second set temperature TB and the warehouse humidity is higher than the set humidity H, the first discharge path on / off valve is opened and the second discharge path on / off valve is closed. The discharge path opening / closing valve is closed and the reheating operation is performed so that the temperature in the warehouse becomes the second set temperature TB. In addition, when the warehouse temperature is lower than the second set temperature TB and the warehouse humidity is lower than the set humidity H, the first discharge path on / off valve and the second discharge path on / off valve are closed to open / close the main discharge path. Close the valve, shut off all paths and shut down the system. That is, the temperature in the warehouse can always be kept near the second set temperature TB, and the humidity in the warehouse can be kept below the set humidity H. In addition, since the switching between the cooling operation and the reheating operation is automatically performed only by setting the second set temperature TB and the set humidity H, the switching between the cooling operation and the reheating operation is easily performed. be able to.

Furthermore, if necessary, the mode switching means includes a timer for performing the drying mode for a predetermined time.
Thereby, when the predetermined time has elapsed, the mode switching means automatically switches from the drying mode to the storage mode, so that the mode switching can be easily performed.

And it is set as the structure which enabled the said 1st preset temperature TA to be 31 degreeC or more as needed. For example, it is possible to set from 31 ° C. to 40 ° C.
Thereby, when drying a stored item, since the temperature in a warehouse can be kept higher than before, drying efficiency can be improved.

Further, the second set temperature TB can be set to ± 0 ° C. or less as required. For example, it can be set to −1 ° C. or lower and −3 ° C.
As a result, when storing the contents, the temperature in the warehouse can be kept at a lower temperature compared to the conventional case. For example, the contents can be stored at ± 0 ° C. or lower, so that the storage property is improved. Can be improved.

  According to the dry storage system of the present invention, the control unit closes the first discharge path on-off valve and the second discharge path on-off valve and opens the main discharge path on-off valve (compressor → external condenser → receiver). Cooling operation in which the path of the liquid device → expansion valve → cooler is effective), and the control unit opens the first discharge path on / off valve and the second discharge path on / off valve to close the main discharge path on / off valve (compression) Machine → first internal condenser and second internal condenser → external condenser → receiver → expansion valve → cooler path effective) or open the first discharge path on-off valve Control that closes the second discharge path on-off valve and closes the main discharge path on-off valve (compressor-> first condenser in the chamber-> external condenser-> receiver-> expansion valve-> cooler path effective) By selectively performing any one of the reheating operations to be performed and repeatedly performing this cooling operation and reheating operation, Dry the contained object while accommodating containers was then to storage conditions.

  In this case, in the reheating operation, the gas refrigerant once cooled and condensed by the internal first condenser and / or the internal second condenser is further cooled and condensed by the external condenser, and then sent to the receiver. That is, since the internal first condenser and the external condenser are provided in the same circulation path in series, and the internal second condenser and the external condenser are also provided in the same circulation path in series. The gas refrigerant entering the receiver is lower in temperature than in the past, so that the temperature of the gas refrigerant becomes as low as possible even if the first condenser in the warehouse and / or the second condenser in the warehouse is reheated. Therefore, the heat exchange efficiency in the cooler is improved and the cooling effect is improved, so that the cooling in the warehouse is sufficiently performed. The dehumidification effect inside can be improved, and the contents should be dried and stored. It can be reliably performed.

It is a block diagram which shows the dry storage system which concerns on embodiment of this invention. It is a block diagram which shows the control part of the dry storage system which concerns on embodiment of this invention. It is a flowchart which shows the effect | action of the dry storage system which concerns on embodiment of this invention. It is a block diagram in the case of performing a cooling operation in the drying control means and the storage control means, showing the dry storage system according to the embodiment of the present invention. It is a block diagram in the case of performing the reheating operation in the drying control means, showing the dry storage system according to the embodiment of the present invention. It is a block diagram in the case of performing the reheating operation in the storage control means, showing the dry storage system according to the embodiment of the present invention. It is a block diagram which shows the case where the dry storage system which concerns on embodiment of this invention is stopped. It is a block diagram which shows an example of the conventional dry storage system.

Hereinafter, a dry storage system according to an embodiment of the present invention will be described with reference to the accompanying drawings. In addition, the same code | symbol is attached | subjected and demonstrated to the same thing as the above.
1 to 7 show a dry storage system S according to an embodiment of the present invention. This system S dries in the state which accommodated things, such as agricultural products, in the warehouse W, and stores it at low temperature after drying, the compressor 1 which discharges a gas refrigerant, and the compressor provided outside the warehouse W 1, an external condenser 2 that cools and condenses the gas refrigerant discharged from the main discharge path 10, a liquid receiver 3 that receives the gas refrigerant condensed and liquefied by the external condenser 2, and a liquid receiver 3. The warehouse W is cooled by heat exchange between the expansion valve 4 capable of adjusting the opening degree for injecting the gas refrigerant from the inside and the gas refrigerant provided in the warehouse W and taking in the inside air in the warehouse W and injected from the expansion valve 4. A cooler 5 that sends the gas refrigerant that has been blown into the interior and that has risen in temperature due to heat exchange to the compressor 1, and blown air that has been blown out from the cooler 5 provided in the warehouse W and takes in the first discharge path 11 from the compressor 1 With gas refrigerant discharged through A first condenser 6 in the warehouse that is heated by conversion and blown into the warehouse W, and a blow-out air that is provided in the warehouse W and blown out from the first condenser 6 in the warehouse, and is taken from the compressor 1 to the second discharge path. And a second internal condenser 7 that is further heated by heat exchange with the gas refrigerant discharged through 12 and blown into the warehouse W.

  A main discharge path opening / closing valve V1 for opening and closing the main discharge path 10 is interposed in the main discharge path 10, and a first discharge path opening / closing valve V2 for opening and closing the first discharge path 11 is provided in the first discharge path 11, The second discharge path 12 is provided with a second discharge path opening / closing valve V3 that opens and closes the second discharge path 12.

  The first discharge path 11 is provided to be branched from the upstream side of the main discharge path on / off valve V1 of the main discharge path 10, and is sent to the first condenser 6 in the warehouse through the first discharge path 11 and the first in the warehouse. A first outflow path 13 through which the gas refrigerant condensed by heat exchange in the condenser 6 flows out is connected to the downstream side of the main discharge path on / off valve V1 of the main discharge path 10. Further, the second discharge path 12 is provided on the upstream side of the main discharge path opening / closing valve V1 of the main discharge path 10 and is branched from the downstream side from the branch point between the main discharge path 10 and the first discharge path 11, and this A second outflow path 14 through which the gas refrigerant that has been sent through the second discharge path 12 to the internal second condenser 7 and condensed by heat exchange in the internal second condenser 7 flows out is the main of the main discharge path 10. It is connected downstream from the discharge path opening / closing valve V1. In the embodiment, the first outflow path 13 is connected to the main discharge path 10 via the common path 15, and the second outflow path 14 is connected to the main discharge path 10 via the common path 15. The gas refrigerant flowing out of the in-compartment first condenser 6 and the in-compartment second condenser 7 through the first outflow path 13 and the second outflow path 14 is further cooled and condensed by the out-of-box condenser 2.

  Further, the outside condenser 2 takes outside air outside the warehouse W by the outside condenser 2 and is heated by heat exchange with the gas refrigerant and blown out outside the warehouse W. An outside fan 8 is provided. Furthermore, in the warehouse W, an internal fan 9 that circulates the blown air blown into the warehouse W from the cooler 5, the internal first condenser 6, and the internal second condenser 7. Is provided.

  Further, the present dry storage system S controls the first discharge path on-off valve V2 and the second discharge path on-off valve V3 to open or close to enable or disable the in-compartment first condenser 6 and the in-compartment second condenser 7. And a control unit 20 that performs control to close the main discharge path opening / closing valve V1 when at least the first internal condenser 6 is effective.

  The control unit 20 has a mode switching means 21 for switching from a drying mode for drying the contents to a storage mode for storing the contents at a low temperature, and opening and closing the first discharge path so that the warehouse temperature becomes the first set temperature TA in the drying mode. The valve V2 and the second discharge path opening / closing valve V3 are opened and closed to perform control to enable or disable the internal first condenser 6 and the internal second condenser 7, and at least the internal first condenser 6 is effective. The drying control means 22 for controlling the main discharge path opening / closing valve V1 to close, and the warehouse temperature is set so that the warehouse temperature becomes a second preset temperature TB lower than the first preset temperature TA in the storage mode. The first discharge path on / off valve V2 and the second discharge path on / off valve V3 are opened / closed so that the humidity becomes H or lower, and the internal first condenser 6 and the internal second condenser 7 are controlled to be valid or invalid. And At least when the internal first condenser 6 is valid is configured to main discharge passage open-close valve V1 and a storage control unit 23 for performing a control to close the.

  The mode switching means 21 includes a timer (not shown) that allows the drying mode to be performed for a predetermined time. The time for performing the drying mode is set, and when a timer (not shown) detects the end of the predetermined time, the drying mode is terminated, and then the drying mode is switched to the storage mode.

  The drying control means 22 closes the first discharge path on-off valve V2 and the second discharge path on-off valve V3 when the temperature in the warehouse is higher than the first set temperature TA, and the first condenser 6 in the warehouse and the first in the warehouse. The second condenser 7 is disabled and the main discharge path on / off valve V1 is opened. When the warehouse temperature is lower than the first set temperature TA, the first discharge path on / off valve V2 and the second discharge path on / off valve V3 are opened. In this manner, the first internal condenser 6 and the second internal condenser 7 are made effective and the main discharge path opening / closing valve V1 is closed. The drying control means 22 closes the first discharge path on-off valve V2 and the second discharge path on-off valve V3 to disable the in-compartment first condenser 6 and the in-compartment second condenser 7, and the main discharge path on-off valve. When the control to open V1 (compressor 1 → external condenser 2 → receiver 3 → expansion valve 4 → cooler 5 path is effective), the cooling operation is performed, and the drying control means 22 Control for opening the first discharge path on-off valve V2 and the second discharge path on-off valve V3 to enable the internal first condenser 6 and the internal second condenser 7 and closing the main discharge path on-off valve V1 ( When the compressor 1 → the first internal condenser 6 and the second internal condenser 7 → the external condenser 2 → the liquid receiver 3 → the expansion valve 4 → the cooler 5 are routed), the reheating operation is performed. It becomes like this. Either the cooling operation or the reheating operation is selectively performed. The drying control means 22 is performed based on detection by a temperature sensor (not shown) that is installed at a predetermined position in the warehouse W and detects the temperature in the warehouse W.

  The storage control means 23 closes the first discharge path on-off valve V2 and the second discharge path on-off valve V3 when the temperature in the warehouse is higher than the second set temperature TB, and stores the first condenser 6 in the warehouse and the first in the warehouse. When the second condenser 7 is disabled and the main discharge path opening / closing valve V1 is opened, the first discharge path opening / closing valve V2 when the warehouse temperature is lower than the second set temperature TB and the warehouse humidity is higher than the set humidity H. Is opened, the first condenser 6 in the warehouse is enabled, the second discharge path on / off valve V3 is closed to disable the second condenser 7 in the warehouse, and the main discharge path on / off valve V1 is closed to close the inside of the warehouse. When the temperature is lower than the second set temperature TB and the humidity in the warehouse is equal to or less than the set humidity H, the first discharge path on / off valve V2 and the second discharge path on / off valve V3 are closed to close the first condenser 6 and the inside of the warehouse. A system that disables the second condenser 7 and closes the main discharge path on-off valve V1. It is carried out. The storage control means 23 closes the first discharge path on-off valve V2 and the second discharge path on-off valve V3 to disable the in-compartment first condenser 6 and the in-compartment second condenser 7, and the main discharge path on-off valve. When the control to open V1 (compressor 1 → external condenser 2 → receiver 3 → expansion valve 4 → cooler 5 path effective) is performed, the cooling operation is performed, and the storage control means 23 is One discharge path on-off valve V2 is opened to enable the first internal condenser 6 and the second discharge path on-off valve V3 is closed to disable the second internal condenser 7 and the main discharge path on-off valve V1. When the control for closing is performed (compressor 1 → first internal condenser 6 → outside condenser 2 → receiver 3 → expansion valve 4 → cooler 5 path effective), the reheating operation is performed. Become. Either the cooling operation or the reheating operation is selectively performed. This storage control means 23 is performed based on detection of a temperature sensor (not shown) and a humidity sensor (not shown) that is installed at a predetermined position in the warehouse W and detects the humidity in the warehouse W.

  In the dry storage system S, the first set temperature TA can be set to 31 ° C. or more, and the second set temperature TB can be set to ± 0 ° C. or less.

Therefore, when the stored items stored in the warehouse W are dried and stored using the dry storage system S according to this embodiment, the following is performed.
Contained items such as onions and garlic are stored in the warehouse W, and the system S is operated in a state where the stored items are stored in the warehouse W, and the cooling operation and the reheating operation are repeated. Then, the contents are dried in a state of being stored in the warehouse, and then stored. Hereinafter, the operation of the system S will be described with reference to the flowchart shown in FIG.

  The dry storage system S first enters a drying mode by the control unit 20 (S-1). Here, the first set temperature TA is set. Although there is an appropriate temperature for drying depending on the items to be stored, the present system S can be set to an appropriate temperature corresponding to the items to be stored because the first set temperature TA can be set to 31 ° C. or higher. Drying efficiency can be improved. Next, a timer is set for the time for performing the drying mode (S-2). This activates the drying mode.

When the drying mode is activated, a temperature sensor (not shown) installed in the warehouse W detects the temperature in the warehouse, and the control unit 20 performs the drying control means 22 based on this detection.
Specifically, when the temperature in the warehouse detected by the temperature sensor (not shown) is higher than the first set temperature TA (S-3 NO), the first discharge path on / off valve V2 and the second discharge path on / off valve V3 are turned on. The internal first condenser 6 and the internal second condenser 7 are disabled by closing and the main discharge path opening / closing valve V1 is opened to perform the cooling operation (S-4). When the compressor 1 is operated, as shown in FIG. 4, the gas refrigerant discharged from the compressor 1 through the main discharge path 10 passes through the main discharge path opening / closing valve V <b> 1 from the main discharge path 10 to the outside condenser 2. Sent to. In the outside condenser 2, outside air outside the warehouse W is taken in, heat is exchanged with the gas refrigerant discharged from the compressor 1, the outside air is heated and blown out of the warehouse W, and this blown air is blown out to the outside fan 8. To send it outside the warehouse W. In addition, the gas refrigerant discharged from the compressor 1 is cooled by heat exchange with the outside air outside the warehouse W to be condensed and liquefied, and then sent to the liquid receiver 3 to reach the expansion valve 4, from the expansion valve 4. It is injected and sent to the cooler 5. At this time, the opening degree of the expansion valve 4 is appropriately adjusted, and the temperature of the gas refrigerant injected from the expansion valve 4 is adjusted. In this cooler 5, the inside air in the warehouse W is taken in and exchanged heat with the gas refrigerant, and the inside air is cooled and blown into the warehouse W by this heat exchange, and this blown air is blown into the warehouse W by the inside fan 9. By circulating, the inside of the warehouse W is cooled. Further, the gas refrigerant whose temperature has been raised by heat exchange with the inside air in the warehouse W by the cooler 5 is sent to the compressor 1, discharged from the compressor 1, and circulated in the same cycle as described above. When the gas refrigerant is circulated in this manner, the inside of the warehouse W is cooled and the temperature in the warehouse is lowered to the first set temperature TA.

  When the temperature in the warehouse detected by the temperature sensor (not shown) becomes lower than the first set temperature TA (S-3 YES), the first discharge path on / off valve V2 and the second discharge path on / off valve V3 are opened. Then, the internal first condenser 6 and the internal second condenser 7 are made effective and the main discharge path opening / closing valve V1 is closed to perform the reheating operation (S-5). The gas refrigerant sent from the cooler 5 to the compressor 1 and discharged from the compressor 1 through the main discharge path 10 passes through the first discharge path 11 branched from the main discharge path 10 as shown in FIG. A second discharge path 12 that is sent from the branch point between the main discharge path 10 and the first discharge path 11 to the downstream side from the branch point of the main discharge path 10 and the first discharge path 11 is sent through the discharge path opening / closing valve V2 Is sent to the second condenser 7 in the warehouse through the second discharge path opening / closing valve V3.

  In the first internal condenser 6, the blown air blown from the cooler 5 is taken in and exchanged with the gas refrigerant from the compressor 1, and the blown air from the cooler 5 is reheated by this heat exchange, and the warehouse. The air is blown into W, and this blown air is circulated into the warehouse W by the internal fan 9. Further, the gas refrigerant cooled and condensed by heat exchange with the air blown from the cooler 5 in the internal first condenser 6 passes through the first outflow path 13 and is discharged from the main discharge path on / off valve V1 downstream. It reaches the path 10 and is sent to the external condenser 2.

  On the other hand, the internal second condenser 7 takes in the air blown out from the internal first condenser 6 and exchanges heat with the gas refrigerant from the compressor 1, and the air is further reheated by this heat exchange. The air is blown into the warehouse W, and this blown air is circulated in the warehouse W by the internal fan 9. Further, the gas refrigerant cooled and condensed by heat exchange with the air blown from the first condenser 6 in the second compartment 7 in the compartment passes through the second outflow passage 14 and is downstream from the main discharge passage opening / closing valve V1. It reaches the main discharge path 10 on the side, and merges with the gas refrigerant cooled and condensed by the internal first condenser 6 and sent to the external condenser 2. In the present embodiment, the gas refrigerant from the internal second condenser 7 merges with the gas refrigerant from the first outflow path 13 in the common path 15 through the second outflow path 14, and passes through the common path 15. It reaches the main discharge path 10 and is sent to the external condenser 2.

  In the outside condenser 2, the outside air is warmed by heat exchange with the gas refrigerant taken in outside air outside the warehouse W and cooled and condensed by the inside first condenser 6 and the inside second condenser 7. The outside air is blown out, and this blown air is sent outside the warehouse W by the outside fan 8. In addition, the gas refrigerant cooled and condensed by the internal first condenser 6 and the internal second condenser 7 is further cooled and condensed by exchanging heat with the outside air outside the warehouse W. Then, it is sent to the liquid receiver 3 and reaches the expansion valve 4, injected from the expansion valve 4, sent to the cooler 5, and circulated in the same cycle as described above. In this case, since the gas refrigerant once cooled and condensed in the internal first condenser 6 and the internal second condenser 7 is further cooled and condensed in the external condenser 2, the gas refrigerant entering the liquid receiver 3 is conventionally used. Compared to

  When the temperature in the warehouse detected by the temperature sensor (not shown) becomes higher than the first set temperature TA (S-3 NO), the first discharge path on / off valve V2 and the second discharge path on / off valve V3 are closed again. Then, the internal first condenser 6 and the internal second condenser 7 are disabled, and the main discharge path on-off valve V1 is opened to perform the cooling operation. As described above, the cooling operation and the reheating operation are performed by changing the circulation path of the gas refrigerant based on the detection of the temperature sensor (not shown) so that the temperature in the warehouse becomes the first set temperature TA. The inside of W is dehumidified, and thereby, the contents stored in the warehouse W can be dried smoothly.

  In this drying control means 22, the temperature in the warehouse can always be kept near the first set temperature TA, and switching between the cooling operation and the reheating operation automatically only by setting the first set temperature TA. Therefore, switching between the cooling operation and the reheating operation can be easily performed. In addition, when drying the contents, it is desirable to keep the temperature in the warehouse at a certain level, so the first set temperature TA is set at a certain level, but the first condenser 6 in the warehouse and the second condensation in the warehouse Since the vessel 7 is enabled, the temperature in the warehouse can be set to an appropriate temperature.

  The drying control unit 22 repeats the cooling operation and the reheating operation, and the drying mode is performed until a timer (not shown) detects the end of the predetermined time (S-6 NO). When a timer (not shown) detects the end of the predetermined time (YES in S-6), the first discharge path on / off valve V2 and the second discharge path on / off valve V3 are closed to close the first condenser 6 and the in-compartment 6 and the warehouse. The inner second condenser 7 is disabled and the main discharge path opening / closing valve V1 is closed, all paths are shut off, the system S is stopped, and the drying mode is terminated (S-7).

  Then, the mode switching means 21 switches from the drying mode to the storage mode (S-8). When the predetermined time has elapsed, the mode switching means 21 automatically switches from the drying mode to the storage mode, so that the mode can be easily switched. Here, the second set temperature TB and the set humidity H are set. The setting of the second set temperature TB and the set humidity H may be performed in advance before the drying mode is activated. Although there is an appropriate temperature for storage depending on the contents to be stored, since the second set temperature TB can be set to ± 0 ° C. or lower in the present system S, for example, the stored items can be stored at ± 0 ° C. or lower. The storage temperature can be improved because the temperature can be set to an appropriate temperature corresponding to the stored items. This activates the storage mode.

When the storage mode is activated, a temperature sensor (not shown) installed in the warehouse W detects the temperature in the warehouse, and a humidity sensor (not shown) installed in the warehouse W detects the humidity in the warehouse. . Based on this detection, the control unit 20 performs storage control means 23.
Specifically, the warehouse humidity detected by the humidity sensor (not shown) is higher than the set humidity H (S-9 NO), and the warehouse temperature detected by the temperature sensor (not shown) is higher than the second set temperature TB. When the temperature is high (S-10 NO), the first discharge path on-off valve V2 and the second discharge path on-off valve V3 are closed to disable the first internal condenser 6 and the second internal condenser 7 and The discharge path opening / closing valve V1 is opened and a cooling operation is performed (S-11). When the compressor 1 is operated, as shown in FIG. 4, the gas refrigerant is circulated in the same manner as described above. When the gas refrigerant is circulated in this manner, the inside of the warehouse W is cooled and the temperature in the warehouse is lowered so as to become the second set temperature TB.

  The warehouse humidity detected by the humidity sensor (not shown) is higher than the set humidity H (S-9 NO), and the warehouse temperature detected by the temperature sensor (not shown) is lower than the second set temperature TB. (S-10 YES), the first discharge path on / off valve V2 is opened to enable the internal first condenser 6 and the second discharge path on / off valve V3 is closed to disable the internal second condenser 7 At the same time, the main discharge path opening / closing valve V1 is closed and the reheating operation is performed (S-12). The gas refrigerant sent from the cooler 5 to the compressor 1 and discharged from the compressor 1 through the main discharge path 10 passes through the first discharge path 11 branched from the main discharge path 10 as shown in FIG. It is sent to the in-compartment first condenser 6 through one discharge path on-off valve V2. In the first internal condenser 6, the blown air blown from the cooler 5 is taken in and exchanged with the gas refrigerant from the compressor 1, and the blown air is heated by this heat exchange and blown into the warehouse W. The blown air is circulated into the warehouse W by the internal fan 9. Further, the gas refrigerant cooled and condensed by heat exchange with the air blown from the cooler 5 in the internal first condenser 6 passes through the first outflow path 13 and is discharged from the main discharge path on / off valve V1 downstream. It reaches the path 10 and is sent to the external condenser 2. In the external condenser 2, the gas refrigerant cooled and condensed by the internal first condenser 6 is further cooled and condensed by exchanging heat with the outside air outside the warehouse W. After that, it is sent to the liquid receiver 3, reaches the expansion valve 4, is injected from the expansion valve 4, and is sent to the cooler 5. In this case, since the gas refrigerant once cooled and condensed by the internal first condenser 6 is further cooled and condensed by the external condenser 2, the gas refrigerant entering the liquid receiver 3 has a lower temperature than the conventional one.

  The warehouse humidity detected by the humidity sensor (not shown) is higher than the set humidity H (S-9 NO), and the warehouse temperature detected by the temperature sensor (not shown) is higher than the second set temperature TB. (S-10NO), the first discharge path on / off valve V2 and the second discharge path on / off valve V3 are closed again to disable the internal first condenser 6 and the internal second condenser 7 and to perform main discharge. The path opening / closing valve V1 is opened and the cooling operation is performed. In this way, the circulation path of the gas refrigerant is varied based on the detection of the temperature sensor and the humidity sensor so that the warehouse temperature becomes the second set temperature TB and the warehouse humidity becomes the set humidity H or less. While the cooling operation and the reheating operation are performed to dehumidify the warehouse W, the temperature in the warehouse can be kept near the second set temperature TB.

  Then, by circulating the gas refrigerant in the above cycle, the inside of the warehouse W is dehumidified, the humidity in the warehouse is lowered, and the humidity in the warehouse detected by the humidity sensor (not shown) becomes the set humidity H or less ( S-9 YES), when the warehouse temperature detected by the temperature sensor (not shown) becomes higher than the second set temperature TB (S-13 NO), the first discharge path opening / closing valve V2 and the second discharge path opening / closing valve V3. Is closed, the internal first condenser 6 and the internal second condenser 7 are disabled, and the main discharge path opening / closing valve V1 is opened to perform the cooling operation (S-11). And as shown in FIG. 4, a gas refrigerant is circulated similarly to the above. When the gas refrigerant is circulated in this manner, the inside of the warehouse W is cooled and the temperature in the warehouse is lowered so as to become the second set temperature TB.

  Then, the humidity in the warehouse detected by the humidity sensor (not shown) becomes equal to or lower than the set humidity H (S-9 YES), and the temperature in the warehouse detected by the temperature sensor (not shown) is lower than the second set temperature TB. (S-13 YES), the first discharge path on / off valve V2 and the second discharge path on / off valve V3 are closed to disable the internal first condenser 6 and the internal second condenser 7, and the main discharge path. The on-off valve V1 is closed, and as shown in FIG. 7, the entire system is shut off to stop the system S, and the storage mode is terminated (S-14).

  After the storage mode ends, the temperature in the warehouse is lower than the second set temperature TB and the humidity in the warehouse is lower than the set humidity H. However, if the stored item is a crop, the stored item breathes. For example, the temperature and humidity in the warehouse W may increase. In this case, the storage control means 23 is actuated again based on the detection of the temperature sensor and the humidity sensor, and the cooling operation and the reheating operation are repeated as described above.

  Thus, based on the detection of the temperature sensor (not shown) and the humidity sensor (not shown) so that the warehouse temperature becomes the second set temperature TB and the warehouse humidity becomes the set humidity H or less. By changing the circulation path of the gas refrigerant and performing the cooling operation and the reheating operation, the temperature in the warehouse can always be kept near the second set temperature TB, and the dehumidification in the warehouse W is performed to store the warehouse. The internal humidity can be kept below the set humidity H, and the contents stored in the warehouse W can be stored at a low temperature. Further, in the storage mode, the control is performed in consideration of the humidity in the warehouse, so that the storage environment can be kept extremely good.

  In this storage control means 23, the cooling operation and the reheating operation are automatically switched only by setting the second set temperature TB and the set humidity H. Can be easily switched.

  As described above, the dry storage system S of the present invention further cools and condenses the gas refrigerant once cooled and condensed in the internal first condenser 6 and / or the internal second condenser 7 by the external condenser 2. The first condenser 6 and the second condenser 2 are provided in the same circulation path in series, and the second condenser 7 and the second condenser Since both are provided in the same circulation path in series, the gas refrigerant entering the receiver 3 is at a lower temperature than in the prior art, and the in-compartment first condenser 6 and / or the in-container second condenser 7 are restarted. Since the gas refrigerant can be sent to the cooler 5 with the temperature being as low as possible even when heated, the heat exchange efficiency in the cooler 5 is improved and the cooling effect is improved. Therefore, the cooling in the warehouse W is sufficiently performed, and the dehumidifying effect in the warehouse W is improved accordingly. So that it is, it is possible to perform drying and storage of the contained object more reliably. Further, since the mode switching means 21 automatically switches from the drying mode to the storage mode, drying and storage can be performed easily and reliably.

In the above embodiment, the first outflow path 13 is connected to the main discharge path 10 via the common path 15 and the second outflow path 14 is connected to the main discharge path 10 via the common path 15. The first outflow path 13 is connected to the downstream side of the main discharge path on / off valve V1 of the main discharge path 10 and the second outflow path 14 is connected to the main discharge path on / off valve V1 of the main discharge path 10. It may be connected to the downstream side and may be changed as appropriate.
In the above embodiment, the main discharge path 10 is interposed in the main discharge path 10 and the first discharge path on-off valve V2 is provided in the first discharge path 11. However, the present invention is not limited to this. Instead, as in the conventional example, a three-way valve may be interposed in the main discharge passage 10 and may be changed as appropriate.
Furthermore, in the said embodiment, although the mode switching means 21 was provided with the timer (not shown), it is not necessarily limited to this.

S Dry storage system W Warehouse V1 Main discharge path on / off valve V2 First discharge path on / off valve V3 Second discharge path on / off valve 1 Compressor 2 Outside condenser 3 Receiver 4 Expansion valve 5 Cooler 6 First condensation in the compartment Unit 7 Second condenser 8 Inside fan 9 Fan inside chamber 10 Main discharge path 11 First discharge path 12 Second discharge path 13 First outflow path 14 Second outflow path 15 Shared path 20 Control unit 21 Mode switching means 22 Drying control means 23 Storage control means

Claims (7)

In a dry storage system that dries the contents stored in the warehouse while being stored in the warehouse and stores them at a low temperature after drying,
A compressor that discharges the gas refrigerant, an external condenser that is provided outside the warehouse and cools and condenses the gas refrigerant discharged from the compressor through the main discharge path, and is condensed and liquefied by the external condenser A liquid receiver that receives the gas refrigerant, an adjustable opening expansion valve that injects the gas refrigerant from the liquid receiver, and a gas refrigerant that is provided in the warehouse and takes in the inside air in the warehouse and is injected from the expansion valve A cooler that cools by heat exchange with the heat exchanger and blows it into the warehouse and sends the gas refrigerant whose temperature has risen by the heat exchange to the compressor, and takes in the blown air blown out from the cooler provided in the warehouse. Heated by heat exchange with the gas refrigerant discharged from the compressor through the first discharge path and blown into the warehouse, and the first condenser in the warehouse was blown out from the first condenser in the warehouse. Take in the blown air and Further warmed by heat exchange with the gas refrigerant discharged through the second discharge path from the aircraft and a second condenser inside the refrigerator to be blown into the warehouse,
The main discharge path is provided with a main discharge path on / off valve that opens and closes the main discharge path, and the first discharge path is branched from the main discharge path on / off valve of the main discharge path. A first discharge path opening / closing valve that opens and closes the first discharge path is provided in one discharge path, the second discharge path is branched from the main discharge path opening / closing valve of the main discharge path, and the second discharge path is provided. A second discharge path opening / closing valve for opening and closing the second discharge path is provided in the discharge path;
A first outflow path through which the gas refrigerant condensed by heat exchange in the first internal condenser flows out is connected to the downstream side of the main discharge path on-off valve of the main discharge path; A second outflow path through which the gas refrigerant condensed by heat exchange at the outlet flows out of the main discharge path on the downstream side of the main discharge path on / off valve, and the internal first condenser and the internal second condenser So that the gas refrigerant flowing out from the above is cooled and condensed by the external condenser,
The first discharge path on-off valve and the second discharge path on-off valve are opened and closed to control to enable or disable the first internal condenser and the second internal condenser, and at least the first internal condensation is performed. A dry storage system comprising a control unit that performs control to close the main discharge path opening / closing valve when the vessel is effective.   Mode switching means for switching the control unit from a drying mode for drying the contents to a storage mode for storing the contents at a low temperature, and the first discharge path so that the temperature in the warehouse becomes the first set temperature TA in the drying mode. When the on-off valve and the second discharge path on-off valve are opened and closed to enable or disable the first internal condenser and the second internal condenser, and at least when the first internal condenser is active A drying control means for controlling to close the main discharge path opening / closing valve; and the warehouse temperature is set to a set humidity so that the warehouse temperature becomes a second set temperature TB lower than the first set temperature TA in the storage mode. When the first discharge path on-off valve and the second discharge path on-off valve are opened and closed so as to be equal to or lower than H, and the first internal condenser and the second internal condenser are controlled to be valid or invalid. Dry storage system of claim 1, wherein the at least the chamber in the first condenser said main discharge passage open-close valve when a valid constructed by a storage control means for performing control to close the well.   The drying control means closes the first discharge path on-off valve and the second discharge path on-off valve when the temperature in the warehouse is higher than the first set temperature TA, and Disabling the two condensers and opening the main discharge path on / off valve, and opening the first discharge path on / off valve and the second discharge path on / off valve when the temperature in the warehouse is lower than the first set temperature TA. 3. The dry storage system according to claim 2, wherein the first and second internal condensers are made effective and the main discharge path on / off valve is closed.   The storage control means closes the first discharge path on-off valve and the second discharge path on-off valve when the warehouse temperature is higher than the second set temperature TB, and When the two condensers are disabled and the main discharge path opening / closing valve is opened, and the warehouse temperature is lower than the second set temperature TB and the warehouse humidity is higher than the set humidity H, the first discharge path opening / closing valve is Open and enable the first condenser in the warehouse and close the second discharge path on / off valve to disable the second condenser in the warehouse and close the main discharge path on / off valve, Is lower than the second set temperature TB and the humidity in the warehouse is equal to or lower than the set humidity H, the first discharge path on-off valve and the second discharge path on-off valve are closed to close the first condenser in the warehouse and the second in the warehouse. Disable the double condenser and close the main discharge path on-off valve Claim 2 or 3 dry storage system, wherein the performing control.   The dry storage system according to any one of claims 2 to 4, wherein the mode switching means includes a timer for performing the dry mode for a predetermined time.   6. The dry storage system according to claim 2, wherein the first set temperature TA can be set to 31 ° C. or higher.   The dry storage system according to any one of claims 2 to 6, wherein the second set temperature TB can be set to ± 0 ° C or less.

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