RU2655212C1 - Refrigerator - Google Patents

Abstract

FIELD: household appliances.

SUBSTANCE: refrigerator contains a chamber for dry products, refrigerating chamber, first cooling and circulation system and a second cooling and circulation system, in which the refrigerant circulates accordingly. Evaporation temperature in the first cooling and circulation system is lower than the evaporation temperature in the second cooling and circulation system. First cooling and circulation system contains an evaporator, located inside the refrigerating chamber. Between the refrigerating chamber and the chamber for dry products, a channel for supplying cold is provided.

EFFECT: by communicating the dry food chamber with the refrigerating compartment of the first cooling and circulating system, the evaporation temperature in which is relatively low, the absolute humidity of the air entering the dry food chamber is significantly reduced, which ensures a lower absolute humidity in the dry food chamber.

10 cl, 3 dwg

Description

This application claims the priority of Chinese Patent Application No. 201410432007.0, filed August 29, 2014 and entitled “Refrigerator”, the contents of which are incorporated herein by reference in their entirety.

FIELD OF TECHNOLOGY

[001] The present invention relates to a refrigerator with a chamber for dry products, which relates to the field of household appliances.

BACKGROUND OF THE INVENTION

[002] Humidity generally refers to air humidity in meteorology or to the water vapor content of air, excluding water in a liquid or solid state. Steam free air is called dry air. Since water vapor in the atmosphere can make up from 0 to 4% of the air volume, the enumeration of the constituents of various gases means the proportion of these constituents in dry air.

[003] “Absolute humidity” (AH) refers to the mass of water vapor contained in a given volume of air, and usually the unit of measurement of this mass is gram / cubic meter. The maximum absolute humidity is the highest saturated humidity.

[004] “Relative humidity” (RH) refers to the ratio of absolute humidity to highest humidity, and RH indicates the degree of saturation with water vapor. Air with an RH of 100% is saturated air. Air with an RH of 50% contains half the water vapor contained in saturated air at the same temperature. In general, water vapor in air with an RH in excess of 100% condenses into water or ice. As temperature rises, more water vapor can dissolve in air, and AH of air rises. When the RH value of air exceeds 100%, the water vapor contained in the air condenses, which can help cool and remove moisture. If the temperature continues to increase, the RH value will decrease, which may facilitate drying.

[005] Drying food is mainly associated with RH. The lower the RH value, the less likely it is that the food will become wet.

[006] Low RH refrigerated storage compartments are designed to store various dry foods or foods requiring a dry environment (such as tea and nuts). Dry food is sensitive to the RH of the environment in which it is stored, and usually requires a relatively low RH, which can vary over a small range. Otherwise, such food may deteriorate or its quality may be adversely affected.

[007] The conventional method for reducing RH in compartments uses the principle of cooling and removing moisture. In other words, the air in the compartment is cooled sufficiently using an evaporator, so that water vapor precipitates and air with lower absolute humidity is obtained. Then, air with a greater absolute humidity in the compartment is replaced by drained air (i.e., air with a greater absolute humidity is forced out of the compartment, and the absolute humidity in the compartment decreases). The environment then raises the temperature so that less RH is obtained and drying is carried out.

SUMMARY OF THE INVENTION

[008] An object of the present invention is to provide a refrigerator in which a dry food chamber located inside it may be provided with air having lower absolute humidity to achieve better moisture removal effects.

[009] To achieve the above objectives, the present invention uses the following technical solutions. A refrigerator is provided comprising a dry food chamber, a refrigeration chamber, a first cooling and circulation system and a second cooling and circulation system in which refrigerant circulates accordingly, wherein the evaporation temperature in the first cooling and circulation system is lower than the evaporation temperature in the second cooling system and circulation; the first cooling and circulation system comprises an evaporator located inside the refrigerator; and between the refrigerating chamber and the chamber for dry products made channel for supplying cold.

[0010] As an improvement of the present invention, the refrigerator further comprises a first capillary tube and a second capillary tube connected in parallel with the evaporator, and control valves located on the first and second capillary tubes, respectively, while the flow rate in the first capillary tube is less than the flow rate during a second capillary tube; the first cooling and circulation system comprises an evaporator and a first capillary tube; the second cooling and circulation system comprises an evaporator and a second capillary tube; and control valves allow alternating actuation of the first and second capillary tubes based on humidity conditions in the dry food chamber.

[0011] As another improvement of the present invention, the refrigerator further comprises a controller that is electrically connected to the control valves and controls the alternating actuation of the first and second capillary tubes based on humidity conditions in the dry food chamber.

[0012] As another improvement of the present invention, the refrigerator further comprises a refrigerator compartment in communication with the cold supply channel, the cold supply channel comprising a main channel in communication with the refrigerating chamber, as well as a first subchannel and a second subchannel, departing from the main channel and communicating it with a chamber for dry products and a refrigerator compartment, respectively.

[0013] As another improvement of the present invention, the refrigerator compartment comprises one of a cooling compartment, a freezer compartment and a temperature change compartment, or a combination thereof.

[0014] As another improvement of the present invention, the refrigerator further comprises a freezer compartment cooled by the first cooling and circulation system, and a cooling compartment cooled by the second cooling and circulation system, the second cooling and circulation system comprising an evaporator for cooling; the cooling compartment and the freezing compartment are respectively formed by partitions of a layer of foam material; a chamber for dry products is located inside the cooling compartment; and the channel for supplying cold leaves the refrigeration chamber, passes through the partitions from the layer of foam material and forms a message with the chamber for dry products; or it exits from the refrigerator to the foam layer on the side of the freezer compartment and forms a message with the dry food chamber in the side of the dry food chamber.

[0015] As a further development of the present invention, the refrigerator further comprises a return air passage made in communication with the dry food chamber, the return air passage passing down and through the partitions from the foam layer and returning replaceable air in the dry chamber products in the freezer compartment; or he leaves the side or back of the freezer compartment and directly forms a message with the refrigerator; and one side of the return air duct is equipped with a return air damper.

[0016] As another improvement of the present invention, the opening time of the cold supply channel is determined by performing the following steps:

[0017] S1: obtaining absolute humidity ρ1 in the dry food chamber and absolute humidity ρ2 in the refrigerating chamber; and

[0018] S2: opening the channel for supplying cold, if the absolute humidity ρ1 is higher than the absolute humidity ρ2;

[0019] or the opening time of the cold supply channel is determined by performing the following actions:

[0020] S1 ’: obtaining the dew point temperature in the dry food chamber and the temperature in the refrigerating chamber; and

[0021] S2 ’: opening the cold supply duct if the temperature in the refrigerator is lower than the dew point temperature in the dry food chamber;

[0022] or the opening time of the cold supply channel is determined by performing the following actions:

[0023] S1 ’’: obtaining the temperature W1 in the dry food chamber; and

[0024] S2 ’’: comparing the obtained temperature W1 in the dry food chamber with a predetermined temperature range D0 in the dry food chamber in the refrigerator; opening the channel for supplying cold, if the obtained temperature W1 in the chamber for dry products is above a predetermined temperature range D0.

[0025] As another improvement of the present invention, one side of the cold supply channel is provided with an air damper for opening the cold supply channel.

[0026] As another improvement of the present invention, the dry food chamber is equipped with a humidity sensor for detecting relative humidity in the dry food chamber and / or a temperature sensor for detecting a temperature therein.

[0027] The present invention may provide the following advantage. Due to the use of the first and second cooling and circulation systems and due to the communication of the chamber for dry products with the refrigeration chamber of the first cooling and circulation system, the evaporation temperature of which is relatively low, the absolute humidity of the air entering the chamber for dry products is significantly reduced, which provides lower absolute humidity in the chamber for dry products.

BRIEF DESCRIPTION OF GRAPHIC MATERIALS

[0028] In FIG. 1 is a partial schematic view of a refrigerator according to one embodiment of the present invention;

[0029] in FIG. 2 shows an RH curve in a dry food chamber versus time using capillary tubes with different diameters; and

[0030] in FIG. 3 is a partial schematic view of a refrigerator according to another embodiment of the present invention.

DETAILED DESCRIPTION

[0031] As shown in FIG. 1, a refrigerator provided in an embodiment of the present invention comprises a cooling compartment 11, a freezer compartment, a temperature change compartment, a cooling and circulation system in which refrigerant is circulating, and a controller. In general, the cooling compartment 11, the freezer compartment, and the temperature change compartment are collectively referred to as the refrigeration compartment. In the cooling compartment 11, in which the standard temperature is 0-10 degrees, for example usually 6-8 degrees, there is a chamber 12 for dry products. The temperature in the chamber 12 for dry products is lower than the temperature in the cooling compartment 11 and is usually 3-5 degrees. The dry food chamber 12 is equipped with a first temperature sensor (not shown) for determining the temperature in the dry food chamber 12 and a first humidity sensor (not shown) for detecting the relative humidity in the dry food chamber, and the first temperature sensor and the first humidity sensor are electrically connected to the controller. Cooling and circulation systems include a condenser, compressor, evaporator 13 and capillary tubes. The evaporator 13 is located inside the refrigerator 14, made in the rear side of the refrigerator compartment. In the refrigerating chamber 14, a second temperature sensor (not shown) for detecting the temperature in the refrigerating chamber 14 and a second humidity sensor (not shown) for detecting the relative humidity in the refrigerating chamber, which are electrically connected to the controller, are arranged. The chamber 12 for dry products is made in communication with the refrigerating chamber 14 and the cooling compartment 11 through the channel 15 for supplying cold, containing the main channel 151, made in communication with the refrigerating chamber 14, as well as the first subchannel 152 and the second subchannel 153 extending from the main channel 151 and communicating with the dry food chamber 12 and the refrigeration compartment 11, respectively. The capillary tubes contain a first capillary tube 161 and a second capillary tube 162, which are connected in parallel with the evaporator 13, while the flow rate in the first capillary tube 161 is less than the flow rate in the second capillary tube 162, and the flow rate in the second capillary tube 162 is equal to the flow rate in a capillary tube used in an existing refrigerator. A condenser, compressor, evaporator 13, and first capillary tube 161 form a first cooling and circulation system; and a condenser, compressor, evaporator 13, and second capillary tube 162 form a second cooling and circulation system. When the refrigerator is in normal cooling mode, the second capillary tube 162 is activated (i.e., the second cooling and circulation system is activated), so that the refrigerant flows into the evaporator 13 through the second capillary tube 162.

[0032] In a cooling and circulation process based on the throttling action of the capillary tube, high temperature and high pressure liquid refrigerant is converted by reducing pressure to a saturated gaseous refrigerant with low temperature and low pressure. In the case of a fixed volume, if the pressure decreases, then the temperature decreases according to the proportional ratio of pressure to gas temperature. Therefore, after throttling through a capillary tube, the greater the decrease in refrigerant pressure, the lower the temperature of the refrigerant. In other words, if the flow rate in the capillary tube decreases, then after throttling, the degree of decrease in refrigerant pressure increases, and the temperature of the refrigerant decreases. Since two capillary tubes (namely, the first capillary tube 161 and the second capillary tube 162) form dual cooling and circulation systems (i.e., the first and second cooling and circulation systems), when the second capillary tube 162 is activated, the flow rate of the refrigerant is comparatively higher. the decrease in refrigerant pressure, which is reduced by the second capillary tube 162, is not obvious and the evaporation temperature is relatively higher; when the first capillary tube 161 is activated, the flow rate of the refrigerant is comparatively lower, the decrease in refrigerant pressure is obvious, and the evaporation temperature is comparatively lower.

[0033] When moisture removal and drying is necessary, the first capillary tube 161 is activated, and the refrigerant flows into the evaporator 13 through the first capillary tube 161, so that the evaporation temperature decreases and, accordingly, the absolute humidity of the air in the cooling chamber 14 decreases. After the moisture removal is complete a second capillary tube 162 is activated, and refrigerant flows into the evaporator 13 through the second capillary tube 162, so that the cooling temperature of the evaporator 13 is maintained in the normal temperature range of the cooling compartment. That is, the temperature is increased to reduce absolute humidity.

[0034] Regulating valves 18 are respectively arranged on the first capillary tube 161 and the second capillary tube 162. The controller is electrically connected to the control valves 18 and is used to alternately actuate the first capillary tube 161 and the second capillary tube 162 based on humidity conditions in the dry chamber 12 . In the present embodiment, the controller determines humidity conditions in the dry food chamber by means of data received from the first moisture sensor in the dry food chamber 12 in order to determine whether the first capillary tube 161 and the second capillary tube 162 need to be alternately activated.

[0035] The lower side of the evaporator 13 is equipped with a fan 19 located in the cooling chamber 14. One of the sides of the first subchannel 152 and the second subchannel 153 is equipped with a first air damper 171 and a second air damper 172, respectively. The first subchannel 152 and the second subchannel 153 can be respectively opened by opening the first air damper 171 and the second air damper 172. The opening of the first air damper 171 and the second air damper 172 is controlled by the controller. The second subchannel 153 is always in the open state when the cooling systems are in operation or in the open state only when the second capillary tube 162 is open. The first subchannel 152 is opened either when the first capillary tube 161 is opened or after the first capillary tube 161 is opened. The opening time of the first subchannel 152 can be the time set in the refrigerator after the opening time of the first capillary tube 161, and the set time is obtained after many tests. Alternatively, the opening time of the first subchannel 152 is determined by performing the following actions:

[0036] S1: obtaining absolute humidity ρ1 in the chamber 12 for dry products and absolute humidity ρ2 in the refrigerating chamber 14; and

[0037] S2: opening of the first subchannel 152 if the absolute humidity ρ1 is higher than the absolute humidity ρ2.

[0038] The specific mode of 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 determined by the first humidity sensor to obtain absolute humidity ρ1, and also receives and processes the temperature determined by the second temperature sensor, and relative humidity detected by a second humidity sensor to obtain an absolute humidity ρ2.

[0039] When the relative humidity in the refrigerating chamber 14 is 100% or condensation occurs in the evaporator 13, the specific step S1 may be 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 absolute humidity ρ1, and also receives and processes the temperature determined by the second temperature sensor to obtain absolute humidity ρ2. In this case, there is no need to use a second humidity sensor to determine the relative humidity.

[0040] Since absolute humidity is difficult to measure in a refrigerator, temperature can be used as a standard for a particular control. In this case, the opening time of the second subchannel 153 is determined by performing the following actions:

[0041] S1 ': obtaining the dew point temperature in the chamber 12 for dry products and the temperature in the refrigerator 14 as follows: the controller in the refrigerator receives and processes the temperature detected by the first temperature sensor in the chamber 12 for dry products and the relative humidity determined by the first humidity sensor in the chamber for dry products, to obtain the dew point temperature; and the temperature in the refrigerating chamber 14 is determined by a second temperature sensor located inside it, while the dew point temperature is obtained using data from a psychrometric diagram of moist air previously loaded into the controller, and, in particular, is obtained using the controller by calculating and querying the temperature, detected by the first temperature sensor, and relative humidity detected by the first humidity sensor; and

[0042] S2 ’: the opening of the second subchannel 153 if the temperature in the refrigerating chamber 14 is lower than the dew point temperature in the chamber 12 for dry products.

[0043] In addition to the two methods described above, for determining the opening time of the second subchannel 153, the opening time of the second subchannel 153 can be determined by performing the following steps:

[0044] S1 ’’: obtaining the temperature W1 in the chamber 12 for dry products; and

[0045] S2 ’’: comparing the obtained temperature W1 in the dry food chamber 12 with a predetermined temperature range D0 in the dry food chamber of the refrigerator; the opening of the second subchannel 153, if the obtained temperature W1 in the chamber 12 for dry products is above a predetermined temperature range D0.

[0046] As shown in FIG. 2, the capillary tube for forming curve 1 is the first capillary tube 161, and the capillary tube for forming curve 2 is the second capillary tube 162. In FIG. 2 shows that the moisture removal effect reflected in curve 2 is better than the moisture removal effect reflected in curve 1.

[0047] In the above embodiment, the cold supply passage 15 is located between the refrigeration chamber 14, the dry food chamber 12 and the cooling compartment 11, and the fan 19 is located on one side of the evaporator 13. However, in other embodiments, the cold supply passage 15 located between the refrigerating chamber 14, the chamber 12 for dry products and other refrigerating compartments, and the fan 19 is also located on the evaporator 13. In this case, the first subchannel 152 is made in communication with the main channel 151 and the chamber 12 for su products, and the second subchannel 153 is in communication with the main channel 151 and other refrigeration compartments, which may contain a freezer compartment.

[0048] In this embodiment, the binary systems are implemented by the first capillary tube 161 and the second capillary tube 162, which have different flow rates and are respectively connected to the evaporator 13. Since the controller is electrically connected to the control valves 18 and alternately activates the first capillary tube 161 and the second capillary tube 162 based on humidity conditions in the chamber 12 for dry products, then when the first capillary tube 161 is activated with a lower flow rate, the absolute humidity is air in the refrigerating chamber 14 is reduced to provide a lower evaporation temperature and the absolute humidity of the air entering the chamber 12 for the dry products is significantly reduced, realizing a better effect moisture removal.

[0049] As shown in FIG. 3, a refrigerator according to another embodiment of the present invention comprises a cooling compartment 21, a freezing compartment 22, a temperature changing compartment, and a first and second cooling and circulation system in which refrigerant circulates accordingly. The cooling compartment 21 and the freezing compartment 22 are respectively formed by partitions 27 of a layer of foam material. In the cooling compartment 21 is a chamber 23 for dry products. In this embodiment, the dry product chamber 23 is located adjacent to the partitions 27 of the foam layer. The standard temperature in the cooling compartment 21 is 0-10 degrees, for example, usually 6-8 degrees. The temperature in the chamber 23 for dry products is lower than the temperature in the cooling compartment 21 and is usually 3-5 degrees. The evaporation temperature in the first cooling and circulation system is lower than the evaporation temperature in the second circulation system. The first cooling and circulation system comprises a freezing evaporator 241, a condenser, a capillary tube and a compressor, and the second cooling and circulation system contains a cooling evaporator 242, a condenser, a capillary tube and a compressor. The rear side of the freezing compartment 22 is equipped with a first refrigerating chamber 251, and the rear side of the cooling compartment 21 is equipped with a second refrigerating chamber 252; and the evaporator 241 for freezing is located in the first refrigerating chamber 251, and the evaporator 242 for cooling is located in the second refrigerating chamber 252. In the chamber 23 for dry products there is a humidity sensor for determining the relative humidity in the chamber 23 for dry products and / or a temperature sensor for determining temperature in the chamber 23 for dry products.

[0050] The first refrigeration chamber 251 is in communication with the dry food chamber 23 through a first cold supply passage 26 that extends from the first refrigeration chamber 251 to the area under the baffles 27 of the foam layer and up through the baffles 27 of the foam layer for communications with the dry food chamber 23 at the bottom of the dry food chamber 23. One side of the first cold supply channel 26 is equipped with an air damper 28 for controlling the opening and closing of the first cold supply channel 26. Of course, in other embodiments, the first cold supply passage may extend from the first refrigerator 251 to the foam layer on the side of the freezer compartment 22 and extend upward to the side of the dry food chamber 23 to communicate with the dry food chamber 23 on the side parts of the chamber 23 for dry products, without passing through the partitions 27 from the foam layer.

[0051] Furthermore, in this embodiment, the return air passage 271 formed between the dry food chamber 23 and the freezer compartment 22 passes through the baffles 27 from the foam layer and returns replaceable air in the dry food chamber 23 to the freezer compartment 22 One side of the return air passage 271 is equipped with a return air damper 272. Of course, the return air channel 271 may not pass through the partitions 27 from the foam layer and may be an independent return air channel that is separately formed on the side or back of the refrigerator and communicates directly with the first cooling chamber 251.

[0052] Furthermore, in this embodiment, there is no direct channel for communicating the first refrigerator 251 with the freezer compartment 22 for supplying cold to the freezer compartment 22. Of course, in the actual construction, the first channel for supplying cold can comprise a main channel in communication with the first refrigerating chamber 251, as well as the first subchannel and the second subchannel, departing from the main channel and communicating with the chamber 23 for dry products and the freezer compartment 22, respectively. The design of the first subchannel may be identical to the design of the aforementioned first channel 26 for supplying cold, passing through partitions 27 from a layer of foam or made on the side of the freezer compartment 22. The second cooling chamber 252 is made in communication with the cooling compartment 21 through the second channel 29 for supplying cold .

[0053] In this embodiment, dual cooling systems (the first cooling and circulation system and the second cooling and circulation system) are implemented by two evaporators (evaporator 241 for freezing and evaporator 242 for cooling) and the first channel for supplying cold communicates with the first cooling chamber 251, equipped with an evaporator 241 for freezing, with a chamber 23 for dry products. Therefore, the lower temperature freezer evaporator 241 is used to cool the replaced air in the dry food chamber 23 and remove moisture therefrom, providing lower absolute humidity of the air entering the dry food chamber 23 and providing a better moisture removal effect.

[0054] In this embodiment, to further reduce the absolute humidity of the air entering the dry food chamber 23, the opening time of the cold supply duct can be determined by performing the following steps:

[0055] S1: obtaining absolute humidity ρ1 in the dry food chamber and absolute humidity ρ2 in the refrigerating chamber; and

[0056] S2: opening the channel for supplying cold, if the absolute humidity ρ1 is higher than the absolute humidity ρ2;

[0057] or the opening time of the channel for supplying cold can be determined by performing the following actions:

[0058] S1 ’: obtaining the dew point temperature in the dry food chamber and the temperature in the refrigerating chamber; and

[0059] S2 ’: opening the cold supply duct if the temperature in the refrigerator is lower than the dew point temperature in the dry food chamber;

[0060] or the opening time of the channel for supplying cold can be determined by performing the following actions:

[0061] S1 ’’: obtaining the temperature W1 in the dry food chamber; and

[0062] S2 ’’: comparing the obtained temperature W1 in the dry food chamber with a predetermined temperature range D0 in the dry food chamber in the refrigerator; opening the channel for supplying cold, if the obtained temperature W1 in the chamber for dry products is above a predetermined temperature range D0.

[0063] In general, by using the first and second cooling and circulating systems and by communicating chambers 12, 23 for dry products with refrigerating chambers 14, 251 of the first cooling and circulating system, the evaporation temperature of which is relatively low, the absolute humidity entering the chambers 12, 23 for dry products is much lower, which provides lower absolute humidity in the chambers 12, 23 for dry products.

[0064] Although preferred embodiments of the present invention are described for illustrative purposes, those skilled in the art will recognize various improvements, additions, and substitutions that are possible within the scope and spirit of the present invention disclosed in the appended claims.

Claims (18)

1. A refrigerator containing a chamber for dry products and a refrigerator, wherein the refrigerator further comprises a first cooling and circulation system and a second cooling and circulation system in which refrigerant circulates accordingly, wherein the evaporation temperature in the first cooling and circulation system is lower than the temperature evaporation in a second cooling and circulation system; the first cooling and circulation system comprises an evaporator located inside the refrigerator; and between the refrigerating chamber and the chamber for dry products made channel for supplying cold. 2. The refrigerator according to claim 1, characterized in that the refrigerator further comprises a first capillary tube and a second capillary tube connected in parallel with the evaporator, and control valves located on the first and second capillary tubes, respectively, while the flow rate in the first capillary tube less flow rate in the second capillary tube; the first cooling and circulation system comprises an evaporator and a first capillary tube; the second cooling and circulation system comprises an evaporator and a second capillary tube; and control valves allow alternating actuation of the first and second capillary tubes based on humidity conditions in the dry food chamber. 3. The refrigerator according to claim 2, characterized in that the refrigerator further comprises a controller that is electrically connected to the control valves and controls the alternate activation of the first and second capillary tubes based on humidity conditions in the chamber for dry products. 4. The refrigerator according to claim 2, characterized in that the refrigerator further comprises a refrigerator compartment made in communication with a channel for supplying cold, while the channel for supplying cold contains a main channel made in communication with a refrigerator, as well as a first subchannel and a second a subchannel extending from the main channel and communicating with the dry food chamber and the refrigerator compartment, respectively. 5. The refrigerator according to claim 4, characterized in that the refrigerator compartment comprises one of a cooling compartment, a freezing compartment and a compartment for changing the temperature, or a combination thereof. 6. The refrigerator according to claim 1, characterized in that the refrigerator further comprises a freezer compartment cooled by the first cooling and circulation system, and a cooling compartment cooled by the second cooling and circulation system, the second cooling and circulation system comprising an evaporator for cooling; the cooling compartment and the freezing compartment are respectively formed by partitions of a layer of foam material; a chamber for dry products is located inside the cooling compartment; and the channel for supplying cold leaves the refrigeration chamber, passes through the partitions from the layer of foam material and forms a message with the chamber for dry products; or it exits from the refrigerator to the foam layer on the side of the freezer compartment and forms a message with the dry food chamber in the side of the dry food chamber. 7. The refrigerator according to claim 6, characterized in that the refrigerator further comprises a return air channel, made in communication with the chamber for dry products, the return air channel passing down and through the partitions from the foam layer and returns the replaced air in the chamber for dry products in the freezer compartment; or he leaves the side or back of the freezer compartment and directly forms a message with the refrigerator; and one side of the return air duct is equipped with a return air damper. 8. The refrigerator according to claim 1, characterized in that the opening time of the channel for supplying cold is determined by performing the following actions: S1: obtaining absolute humidity ρ1 in the dry food chamber and absolute humidity ρ2 in the refrigerating chamber; and S2: openings of the cold supply channel if the absolute humidity ρ1 is higher than the absolute humidity ρ2; or the opening time of the channel for supplying cold is determined by performing the following actions: S1 ’: obtaining the dew point temperature in the dry food chamber and the temperature in the refrigerating chamber; and S2 ’: opening the cold supply duct if the temperature in the refrigerator is lower than the dew point temperature in the dry chamber; or the opening time of the channel for supplying cold is determined by performing the following actions: S1 ’’: obtaining the temperature W1 in the dry food chamber; and S2 ’’: comparing the obtained temperature W1 in the dry food chamber with a predetermined temperature range D0 in the dry food chamber in the refrigerator; opening the channel for supplying cold, if the obtained temperature W1 in the chamber for dry products is above a predetermined temperature range D0. 9. The refrigerator according to claim 1, characterized in that one side of the cold supply channel is equipped with an air damper to open the cold supply channel. 10. The refrigerator according to claim 1, characterized in that the chamber for dry products is equipped with a humidity sensor for determining the relative humidity in the chamber for dry products and / or a temperature sensor for determining the temperature therein.

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