JP2017528682A - refrigerator - Google Patents

Abstract

The present invention provides a drying chamber, a cooling chamber, a refrigerator including a first cooling circulation system and a second cooling circulation system for circulating a refrigerant. The evaporation temperature of the first cooling circulation system is lower than the evaporation temperature of the second cooling circulation system, and the first cooling circulation system includes an evaporator disposed in the cooling chamber, and the cooling chamber and the drying chamber Between the two, a cold energy passage is provided. The first cooling circulation system and the second cooling circulation system are employed, and the drying chamber communicates with the cooling chamber of the first cooling circulation system disposed therein and having a relatively low evaporation temperature. The absolute moisture content of the flowing air is less and a lower absolute humidity in the drying chamber is achieved. [Selection] Figure 1

Description

  This application claims the priority of the Chinese application dated August 29, 2014 (application number 201410432007.0, invention name “refrigerator”), and the entire contents of the Chinese application are incorporated herein by reference. .

  The present invention relates to the field of household appliances, and more particularly to a refrigerator having a drying room.

  Humidity generally indicates the humidity of air in meteorology, that is, the water vapor content in the air and does not include liquid or solid water. Air that does not contain water vapor is referred to as dry air. Since atmospheric water vapor accounts for 0% to 4% of the air volume, the various gaseous components in the air listed typically represent the components that these components occupy in dry air.

  “Absolute humidity” refers to the mass of water vapor contained in a fixed volume of air, and its unit is usually grams / cubic meter. The maximum absolute humidity is the maximum humidity at saturation.

  “Relative humidity” (RH) is the ratio of absolute humidity to maximum humidity, and the value indicates the saturation of water vapor. Air having a relative humidity of 100% is saturated air. Air with a relative humidity of 50% contains water vapor that reaches half the saturation point of air at the same temperature. Water vapor in the air with a relative humidity exceeding 100% usually condenses as water or ice. As the temperature increases, the amount of water vapor that can be dissolved in the air increases and the absolute humidity value of the air increases. When the relative humidity value of air exceeds 100%, water vapor in the air condenses. This is used for cooling and dehumidification. Increasing the temperature decreases the relative humidity. This is used for drying.

  The drying of food is mainly related to the relative humidity. If the relative humidity is low, the food is less likely to get moisture.

  By placing a low relative humidity storage room in the refrigerator, various dry matter or foods that need to be dried (eg, tea, dried fruits, etc.) can be stored. Since dried foods are sensitive to the relative humidity of the storage environment, it is usually necessary for the relative humidity to be relatively low and the relative humidity change range to be relatively small and constant. Otherwise, the food is likely to be altered and the quality is affected.

  As a conventional method of reducing the relative humidity of the storage chamber, the principle of cooling dehumidification is adopted. That is, by utilizing the cooling function of the evaporator, the air in the storage chamber is sufficiently cooled through the evaporator, the water is deposited and dehumidified to obtain air having a lower absolute moisture content, and then the storage chamber The air is exchanged with air having a high absolute moisture content (that is, the air having a high absolute moisture content is expelled and the absolute moisture content of the air in the containing chamber is reduced), and then under the heating action of the surrounding environment. The temperature is raised, thereby obtaining a relatively low relative humidity and realizing the purpose of drying.

  An object of the present invention is to provide a refrigerator capable of realizing a better dehumidifying effect by providing air having a smaller absolute water content to a drying chamber in the refrigerator.

  In order to achieve the above object, the present invention employs the following technical solutions. The refrigerator includes a drying chamber and a cooling chamber, and further includes a first cooling circulation system and a second cooling circulation system for circulating the refrigerant. The evaporation temperature of the first cooling circulation system is lower than the evaporation temperature of the second cooling circulation system. The first cooling circulation system includes an evaporator disposed in the cooling chamber, and a cold energy passage is provided between the cooling chamber and the drying chamber.

  Preferably, the refrigerator further includes a first capillary and a second capillary connected in parallel to the evaporator, and a control valve disposed in the first capillary and the second capillary. The flow rate of the first capillary is less than the flow rate of the second capillary. The first cooling circulation system includes the evaporator and the first capillary, and the second cooling circulation system includes the evaporator and the second capillary. Opening / closing switching between the first capillary and the second capillary is performed by the control valve based on the humidity state of the drying chamber.

  Preferably, the refrigerator further includes a controller. The controller and the control valve are electrically connected and perform opening / closing switching between the first capillary and the second capillary based on the humidity state of the drying chamber.

  Preferably, the refrigerator further includes a cooling chamber connected to the cold energy passage. The cold energy passage includes a main passage connected to the cooling chamber, a first sub passage and a second sub passage which are branched from the main passage and connected to the drying chamber and the cooling chamber, respectively.

  Preferably, the cooling chamber is any one or a combination of two or more of a refrigerator compartment, a freezer compartment, and a temperature variable chamber.

  Preferably, the refrigerator further includes a freezer compartment that is cooled by the first cooling circulation system and a refrigerator compartment that is cooled by the second cooling circulation system. The second cooling circulation system includes a refrigeration evaporator. The refrigerator compartment and the freezer compartment are separated and formed by a partition plate with a foam layer, the drying chamber is arranged in the refrigerator compartment, and the cold energy passage extends from the cool chamber and extends with the foam layer partition. It is provided so as to penetrate the plate and communicate with the drying chamber, or extend from the cooling chamber into the foam layer on the side of the freezing chamber and communicate with the drying chamber from the side of the drying chamber. ing. Preferably, the refrigerator further includes a return air passage communicating with the drying chamber. The return air passage extends downward through the partition plate with the foam layer and returns the exchange airflow of the drying chamber to the freezing chamber, or extends from a side portion or a rear portion of the freezing chamber and the cooling chamber. It is provided to communicate directly. A return air damper is disposed on one side of the return air passage.

Preferably, the timing for opening the cold energy passage is determined by the following method.
S1: The absolute humidity ρ1 in the drying chamber is acquired, and the absolute humidity ρ2 in the cooling chamber is acquired.
S2: When the absolute humidity ρ1 becomes higher than the absolute humidity ρ2, the cold energy passage is opened.
Alternatively, it is determined by the following method.
S1 ′: The dew point temperature in the drying chamber is acquired, and the temperature in the cooling chamber is acquired.
S2 ′: When the temperature in the cooling chamber becomes lower than the dew point temperature in the drying chamber, the cold energy passage is opened.
Alternatively, it is determined by the following method.
S1 ″: The temperature W1 of the drying chamber is acquired.
S2 '': The acquired temperature W1 of the drying chamber is compared with a predetermined temperature range D0 of the drying chamber in the refrigerator. When the temperature W1 of the drying chamber becomes higher than the predetermined temperature range D0, the cold energy passage Is open.

  Preferably, a damper for opening and closing the cold energy passage is disposed on one side of the cold energy passage.

  Preferably, a humidity sensor for detecting a relative humidity in the drying chamber and / or a temperature sensor for detecting a temperature in the drying chamber are arranged in the drying chamber.

  The first cooling circulation system and the second cooling circulation system are employed, and the drying chamber communicates with the cooling chamber of the first cooling circulation system disposed therein and having a relatively low evaporation temperature. The absolute moisture content of the flowing air is smaller and a lower absolute humidity in the drying chamber is realized.

It is a partial structure schematic diagram of the refrigerator in one embodiment concerning the present invention. When capillaries with different thicknesses are used, it is a relationship curve diagram of relative humidity and time in the drying chamber. It is a partial structure schematic diagram of the refrigerator in another embodiment concerning the present invention.

<Embodiment 1>
As shown in FIG. 1, the refrigerator in one embodiment according to the present invention includes a refrigerator compartment 11, a freezer compartment, a temperature variable chamber, a cooling circulation system that provides refrigerant circulation, and a controller. The refrigerator compartment 11, the freezer compartment, and the temperature variable chamber are collectively referred to as a cooling compartment. A drying chamber 12 is disposed in the refrigerator compartment 11. The standard temperature in the refrigerator compartment 11 is 0 to 10 °, and usually 6 to 8 °. The temperature in the drying chamber 12 is lower than the temperature in the refrigerator compartment 11, and is usually 3 to 5 °. In the drying chamber 12, a first temperature sensor (not shown) and a first humidity sensor (not shown) for detecting the temperature and relative humidity in the drying chamber 12 are arranged. The first temperature sensor, the first humidity sensor, and the controller are electrically connected. The cooling circulation system includes a condenser, a compressor, an evaporator 13 and a capillary tube. The evaporator 13 is disposed in the cooling chamber 14. The cooling chamber 14 is disposed on the rear side of the cooling chamber. In the cooling chamber 14, a second temperature sensor (not shown) and a second humidity sensor (not shown) for detecting the temperature and relative humidity in the cooling chamber 14 are arranged. The second temperature sensor, the second humidity sensor, and the controller are electrically connected. The drying chamber 12 communicates with the cooling chamber 14 and the refrigerating chamber 11 through the cold energy passage 15. The cold energy passage 15 is branched from the main passage 151 and the main passage 151 connected to the cooling chamber 14, and passes through the first sub passage 152 and the second sub passage 153 connected to the drying chamber 12 and the refrigerator compartment 11, respectively. Including. The capillary tube includes a first capillary tube 161 and a second capillary tube 162 connected in parallel to the evaporator 13. The flow rate of the first capillary 161 is less than the flow rate of the second capillary 162, and the flow rate of the second capillary 162 is the same as the flow rate of the capillary used in the conventional refrigerator. The condenser, compressor, evaporator 13 and first capillary 161 form a first cooling circulation system, and the condenser, compressor, evaporator 13 and second capillary 162 form a second cooling circulation system. Yes. When the refrigerator is normally cooled, the second capillary 162 is switched to be opened (that is, switched to the activation of the second cooling circulation system). At this time, the refrigerant flows into the evaporator 13 through the second capillary 162.

  In the cooling circulation, the role of the capillary is as follows. Due to the flow-throttle action of the capillary, the high-temperature and high-pressure liquid refrigerant becomes a low-pressure and low-temperature saturated gas refrigerant. When the volume is constant, based on the proportional relationship between the gas pressure and temperature, the lower the pressure, the lower the temperature. Therefore, the larger the pressure drop of the refrigerant due to the flow restriction by the capillary tube, the lower the temperature of the refrigerant. That is, the smaller the flow rate of the capillary, the more drastically the refrigerant pressure is lowered and the temperature is lowered after the flow restriction. Since the paired capillaries (first capillary 161 and second capillary 162) are employed to form a dual cooling circulation system (first cooling circulation system and second cooling circulation system), the second capillary 162 is opened. Is switched, the flow rate of the refrigerant is large, the pressure drop of the refrigerant after the pressure drop through the second capillary 162 is small, and the evaporation temperature becomes relatively high. On the other hand, when switching so that the first capillary 161 is opened, the flow rate of the refrigerant is small, the pressure drop of the refrigerant is large, and the evaporation temperature becomes relatively low.

  When it is necessary to perform dehumidification drying, first, switching is performed so that the first capillary 161 is opened. Then, the refrigerant flows into the evaporator 13 through the first capillary 161, so that the evaporation temperature is lower and the absolute humidity of the air in the cooling chamber 14 is also lower. After the dehumidifying operation is completed, switching is performed so that the second capillary 162 is opened. Then, when the refrigerant flows into the evaporator 13 through the second capillary 162, the cooling temperature of the evaporator 13 is maintained within the normal temperature range of the refrigerator compartment, and the temperature rises, thereby reducing the relative humidity value. To do.

  A control valve 18 is connected to the first capillary 161 and the second capillary 162. The controller and the control valve 18 are electrically connected and switch between opening and closing of the first capillary 161 and the second capillary 162 according to the humidity condition of the drying chamber 12. In the first embodiment, the controller determines the humidity state in the drying chamber based on the data detected by the first humidity sensor in the drying chamber 12, thereby switching between opening and closing of the first capillary 161 and the second capillary 162. Judge whether or not to perform.

A blower 19 is disposed below the evaporator 13. The blower 19 is disposed in the cooling chamber 14. A first damper 171 and a second damper 172 are arranged on one side of the first sub-passage 152 and one side of the second sub-passage 153, respectively. The opening / closing of the first sub-passage 152 and the second sub-passage 153 is realized by opening / closing the first damper 171 and the second damper 172, respectively, and the opening / closing of the first damper 171 and the second damper 172 is controlled by a controller. Has been. The second sub-passage 153 is always opened during the operation of the cooling system. Alternatively, the second sub-passage 153 is placed in an open state only when the second capillary 162 is open. The timing for opening the first sub-passage 152 is when the first capillary 161 is opened or after the first capillary 161 is opened. The timing for opening the first sub-passage 152 may be a predetermined timing later than the timing for opening the first capillary 161 in the refrigerator, and the predetermined timing is a timing acquired after a plurality of tests. . Alternatively, the timing for opening the first sub-passage 152 may be determined by the following method.
S1: The absolute humidity ρ1 in the drying chamber 12 is acquired, and the absolute humidity ρ2 in the cooling chamber 14 is acquired.
S2: When the absolute humidity ρ1 becomes higher than the absolute humidity ρ2, the first sub-passage 152 is opened.

  A specific method for realizing step S1 is as follows. The controller in the refrigerator receives and processes the temperature detected by the first temperature sensor and the relative humidity detected by the first humidity sensor to obtain the absolute humidity ρ1, and the controller acquires the absolute humidity ρ1 by the second temperature sensor. Receive and process the detected temperature and the relative humidity detected by the second humidity sensor to obtain the absolute humidity ρ2.

  When the relative humidity in the cooling chamber 14 is 100%, that is, when dew condensation is generated on the evaporator 13, a specific method of realizing Step S1 is as follows. The controller in the refrigerator receives and processes the temperature detected by the first temperature sensor and the relative humidity detected by the first humidity sensor to obtain the absolute humidity ρ1, and the controller acquires the absolute humidity ρ1 by the second temperature sensor. Receive and process the acquired temperature to obtain absolute humidity ρ2. At this time, it is not necessary to employ the second humidity sensor to detect the relative humidity.

However, since it is difficult to measure the absolute humidity value in the refrigerator, the temperature may be used as a reference when specifically controlling. At this time, the timing for opening the second sub-passage 153 is as follows.
S1 ′: The dew point temperature in the drying chamber 12 is acquired, and the temperature in the cooling chamber 14 is acquired. The dew point temperature in the drying chamber 12 and the temperature in the cooling chamber 14 are acquired by the following methods. A controller in the refrigerator receives and processes the temperature detected by the first temperature sensor in the drying chamber 12 and the relative humidity detected by the first humidity sensor to obtain the dew point temperature. The temperature of the cooling chamber 14 is acquired by detection of the second temperature sensor in the cooling chamber 14, and the dew point temperature is confirmed by examining a wet air diagram stored in advance in the controller. Specifically, the dew point temperature is confirmed by calculating and investigating based on the temperature detected by the first temperature sensor received by the controller and the relative humidity detected by the humidity sensor.
S2 ′: When the temperature in the cooling chamber 14 becomes lower than the dew point temperature in the drying chamber 12, the second sub-passage 153 is opened.

In addition to determining the timing for opening the second sub-passage 153 by the above two methods, the timing for opening the second sub-passage 153 may be determined by the following method.
S1 ″: The temperature W1 of the drying chamber 12 is acquired.
S2 '': The obtained temperature W1 of the drying chamber 12 is compared with the predetermined temperature range D0 of the drying chamber 12 in the refrigerator. When the temperature W1 of the drying chamber 12 becomes higher than the predetermined temperature range D0, the second sub-passage 153 Is open.

  Please refer to FIG. In FIG. 2, the capillary used to form curve 1 is the first capillary 161, and the capillary used to form curve 2 is the second capillary 162. From FIG. 2, it can be seen that the dehumidifying effect reflected in curve 2 is superior to the dehumidifying effect of curve 1.

  In the first embodiment, the cold energy passage 15 is provided between the cooling chamber 14, the drying chamber 12, and the refrigeration chamber 11, and the blower 19 is disposed on one side of the evaporator 13. Of course, in other embodiments, the cold energy passage 15 may be provided between the cooling chamber 14, the drying chamber 12 and other cooling chambers, and the blower 19 may be disposed in the evaporator 13 as well. At this time, the first sub-passage 152 is connected to the main passage 151 and the drying chamber 12, and the second sub-passage 153 is connected to the main passage 151 and other cooling chambers. The other cooling room is a freezing room.

  In the first embodiment, the dual system is realized by the first capillary 161 and the second capillary 162 having different flow rates connected to the evaporator 13, the controller and the control valve 18 are electrically connected, and the drying is performed. Since the first capillary 161 and the second capillary 162 are opened and closed based on the humidity state of the chamber 12, the absolute humidity of the air in the cooling chamber 14 when the first capillary 161 having a relatively small flow rate is opened. As a result, the obtained evaporation temperature is further lowered, the absolute moisture content of the air flowing into the drying chamber 12 is smaller, and a better dehumidifying effect is realized.

<Embodiment 2>
As shown in FIG. 3, the refrigerator according to another embodiment of the present invention includes a refrigerator compartment 21, a freezer compartment 22, a temperature variable chamber, a first cooling circulation system and a second cooling circulation for providing refrigerant circulation. Has a system. The refrigerator compartment 21 and the freezer compartment 22 are separately formed by a partition plate 27 with a foam layer. A drying chamber 23 is arranged in the refrigerator compartment 21. In the second embodiment, the drying chamber 23 is disposed so as to contact the partition plate 27 with a foam layer. The standard temperature in the refrigerator compartment 21 is 0 to 10 °, and usually 6 to 8 °. The temperature in the drying chamber 23 is lower than the temperature in the refrigerator compartment 21, and is usually 3 to 5 °. The evaporation temperature of the first cooling circulation system is lower than the evaporation temperature of the second cooling circulation system. The first cooling circulation system includes a refrigeration evaporator 241, a condenser, a capillary tube and a compressor, and the second cooling circulation system includes a refrigeration evaporator 242, a condenser, a capillary tube and a compressor. A first cooling chamber 251 is disposed on the rear side of the freezer compartment 22, and a second cooling chamber 252 is disposed on the rear side of the refrigerator compartment 21. The refrigeration evaporator 241 is disposed in the first cooling chamber 251, and the refrigeration evaporator 242 is disposed in the second cooling chamber 252. In the drying chamber 23, a humidity sensor for detecting the relative humidity in the drying chamber 23 and / or a temperature sensor for detecting the temperature in the drying chamber 23 are arranged.

  The first cooling chamber 251 and the drying chamber 23 communicate with each other via the first cold energy passage 26. The first cold energy passage 26 extends from the first cooling chamber 251 to the lower side of the partition plate 27 with the foam layer and penetrates the partition plate 27 with the foam layer upward. It communicates with the drying chamber 23. A damper 28 for controlling the opening and closing of the first cold energy passage 26 is disposed on one side of the first cold energy passage 26. Of course, in other embodiments, the first cold energy passage extends from the first cooling chamber 251 into the foam layer on the side of the freezing chamber 22 and further extends to the side of the upper drying chamber 23. Thereby, it is not necessary to communicate with the drying chamber 23 from the side of the drying chamber 23 and to pass through the partition plate 27 with the foam layer.

  In the second embodiment, a return air passage 271 is further formed between the drying chamber 23 and the freezing chamber 22. The return air passage 271 passes through the partition plate 27 with the foam layer and returns the exchange airflow in the drying chamber 23 into the freezer compartment 22. A return air damper 272 is disposed on one side of the return air passage 271. Of course, the return air passage 271 may be provided so as not to penetrate the partition plate 27 with the foam layer, to be independently disposed on the side portion or the rear portion of the refrigerator, and to directly communicate with the first cooling chamber 251.

  In the second embodiment, a direct passage for communicating with the first cooling chamber 251 and the freezing chamber 22 and supplying cold energy to the freezing chamber 22 is not shown. Of course, when designing according to the application, the first cold energy passage is branched from the main passage connected to the first cooling chamber 251 and the main passage, and connected to the drying chamber 23 and the freezing chamber 22. A first sub-passage and a second sub-passage may be included. The structure of the first sub-passage is formed by penetrating the partition plate 27 with the foam layer or being disposed on the side portion of the freezer compartment 22, similarly to the first cold energy passage 26 described above. The second cooling chamber 252 and the refrigerator compartment 21 communicate with each other via the second cold energy passage 29.

  In the second embodiment, it is realized by a dual system (first cooling circulation system and second cooling circulation system) and two evaporators (refrigeration evaporator 241 and refrigeration evaporator 242), and further, the first cold energy passage is refrigeration. The first cooling chamber 251 in which the evaporator 241 is arranged communicates with the drying chamber 23. Thereby, cooling dehumidification is performed on the replacement air in the drying chamber 23 using the refrigeration evaporator 241 having a lower temperature, and lower absolute humidity and better dehumidifying effect of the air sent into the drying chamber 23 are realized. The

In the second embodiment, the timing for opening the cold energy passage may be determined by the following method so that the absolute moisture content of the air into the drying chamber 23 becomes smaller.
S1: The absolute humidity ρ1 in the drying chamber is acquired, and the absolute humidity ρ2 in the cooling chamber is acquired.
S2: When the absolute humidity ρ1 becomes higher than the absolute humidity ρ2, the cold energy passage is opened.
Alternatively, it is determined by the following method.
S1 ′: The dew point temperature in the drying chamber is acquired, and the temperature in the cooling chamber is acquired.
S2 ′: When the temperature in the cooling chamber becomes lower than the dew point temperature in the drying chamber, the cold energy passage is opened.
Alternatively, it is determined by the following method.
S1 '': The temperature W1 of the drying chamber is acquired.
S2 '': The acquired temperature W1 of the drying chamber is compared with a predetermined temperature range D0 of the drying chamber in the refrigerator. When the temperature W1 of the drying chamber becomes higher than the predetermined temperature range D0, the cold energy passage is opened.

  Therefore, the first cooling circulation system and the second cooling circulation system are adopted, and the drying chambers 12 and 23 communicate with the cooling chambers 14 and 251 of the first cooling circulation system disposed in them at a relatively low evaporation temperature. By doing so, the absolute moisture content of the air flowing into the drying chambers 12 and 23 is smaller, and a lower absolute humidity in the drying chambers 12 and 23 is realized.

  For the purpose of illustration, a preferred embodiment of the invention has been described, but various modifications, additions and substitutions will occur to those skilled in the art without departing from the scope and spirit of the invention as set forth in the appended claims. You will understand that it is possible.

Claims (10)

  A drying chamber, a cooling chamber, a first cooling circulation system and a second cooling circulation system for circulating the refrigerant, wherein an evaporation temperature of the first cooling circulation system is lower than an evaporation temperature of the second cooling circulation system, The first cooling circulation system includes an evaporator disposed in the cooling chamber, and a cold energy passage is provided between the cooling chamber and the drying chamber.   The apparatus further comprises a first capillary and a second capillary connected in parallel to the evaporator, and a control valve disposed in the first capillary and the second capillary, the flow rate of the first capillary being the flow rate of the second capillary Less, the first cooling circulation system includes the evaporator and the first capillary, and the second cooling circulation system includes the evaporator and the second capillary, and the first capillary and the second capillary. The refrigerator according to claim 1, wherein the opening / closing switching is performed by the control valve based on a humidity state of the drying chamber.   The apparatus further comprises a controller, wherein the controller and the control valve are electrically connected, and perform opening / closing switching between the first capillary and the second capillary based on the humidity condition of the drying chamber. 2. The refrigerator according to 2.   The cooling energy passage further includes a cooling chamber connected to the cooling energy passage, and the cooling energy passage is branched from the main passage connected to the cooling chamber, and connected to the drying chamber and the cooling chamber, respectively. The refrigerator according to claim 2, comprising a first sub-passage and a second sub-passage.   The refrigerator according to claim 4, wherein the cooling chamber is one or a combination of two or more of a refrigeration chamber, a freezing chamber, and a temperature variable chamber.   The apparatus further comprises a freezer compartment that is cooled by the first cooling circulation system and a refrigerating room that is cooled by the second cooling circulation system, the second cooling circulation system including a refrigerating evaporator, and the refrigerating room And the freezing chamber is separated and formed by a partition plate with a foam layer, the drying chamber is disposed in the refrigerator compartment, and the cold energy passage extends from the cooling chamber and penetrates the partition plate with a foam layer. And provided to communicate with the drying chamber, or extend from the cooling chamber into the foam layer on the side of the freezing chamber and communicate with the drying chamber from the side of the drying chamber. The refrigerator according to claim 1.   A return air passage communicating with the drying chamber is further provided, the return air passage penetrating downward through the partition plate with a foam layer and returning the exchange airflow of the drying chamber to the freezer compartment, or of the freezer compartment 7. The return air damper is provided so as to extend from a side portion or a rear portion and communicate directly with the cooling chamber, and a return air damper is disposed on one side of the return air passage. refrigerator. The timing for opening the cold energy passage is as follows:
Obtaining an absolute humidity ρ1 in the drying chamber, and obtaining an absolute humidity ρ2 in the cooling chamber;
When the absolute humidity ρ1 becomes higher than the absolute humidity ρ2, it is determined by the step S2 for opening the cold energy passage.
Step S1 ′ for obtaining a dew point temperature in the drying chamber and obtaining a temperature in the cooling chamber;
When the temperature in the cooling chamber becomes lower than the dew point temperature in the drying chamber, it is determined by step S2 ′ for opening the cold energy passage.
Or
Obtaining a temperature W1 of the drying chamber S1 '';
The acquired temperature W1 of the drying chamber is compared with the predetermined temperature range D0 of the drying chamber, and when the temperature W1 of the drying chamber becomes higher than the predetermined temperature range D0, the step S2 '' for opening the cold energy passage is performed. The refrigerator according to claim 1, which is determined by:   The refrigerator according to claim 1, wherein a damper for opening and closing the cold energy passage is disposed on one side of the cold energy passage. The humidity chamber for detecting the relative humidity in the drying chamber and the temperature sensor for detecting the temperature in the drying chamber are arranged in the drying chamber. Refrigerator.