Refrigerator

Abstract

The embodiment of the invention belongs to the technical field of household appliances, and provides a refrigerator which comprises a refrigerating chamber, a freezing chamber and an icing chamber arranged in the refrigerating chamber, the refrigerating chamber and the freezing chamber are spaced through a spacing layer, a first heat transfer channel is arranged on the spacing layer, a first air door is arranged in the first heat transfer channel, and a second air door is arranged in the first air door. The icing chamber comprises an outer shell, a heat conductor and an inner shell, the outer shell is connected to the spacing layer, the orthographic projection of the outer shell on the spacing layer covers the first heat transfer channel, the outer shell is provided with a second heat transfer channel communicated with the refrigerating chamber, and a second air door is arranged in the second heat transfer channel; the heat conductor blocks the first heat transfer channel and the second heat transfer channel, an icing cavity for containing iced objects is defined by the inner shell, and a liquid medium injection sealing space is formed between the inner shell and the outer shell. According to the refrigerator provided by the embodiment of the invention, the purpose of quickly cooling drinks can be achieved, and the risk that the bottle body and the tank body containing the drinks are frozen to crack can be avoided.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of household appliances, and more specifically, to a refrigerator. Background Art

[0002] A refrigerator is a household appliance used to store and preserve food and drinks. It uses refrigeration technology to lower the temperature of the storage space to extend the shelf life of food.

[0003] The refrigerator includes a refrigerator and a freezer. The temperature of the refrigerator is between 0℃ and 10℃, and it is mainly used to store vegetables, fruits, etc. The temperature of the freezer is around -18℃, and it is mainly used to store fish, meat, etc. When users use the refrigerator to chill drinks, they usually put the drinks in the refrigerator or freezer.

[0004] However, if the beverages are placed in the refrigerator, the cooling speed is too slow, and if they are placed in the freezer, the cooling time is difficult to control, and there is a risk of cracking the bottle or can of the beverage. Summary of the invention

[0005] The embodiment of the present application provides a refrigerator that can quickly cool drinks while reducing the risk of the bottle or can of the drink being frozen and cracked.

[0006] The present application provides a refrigerator, comprising:

[0007] A refrigerating chamber and a freezing chamber, wherein the refrigerating chamber and the freezing chamber are separated by a spacer layer, the spacer layer is provided with a first heat transfer channel, and a first damper is provided in the first heat transfer channel;

[0008] An ice-cooling chamber, the ice-cooling chamber being arranged in the refrigerating chamber;

[0009] The ice chamber comprises:

[0010] an outer shell, the outer shell being connected to the spacer layer, and the orthographic projection of the outer shell on the spacer layer covering the first heat transfer channel, the outer shell being provided with a second heat transfer channel, the second heat transfer channel being in communication with the refrigerating chamber, and a second damper being provided in the second heat transfer channel;

[0011] a heat conductor, the heat conductor blocking the first heat transfer channel and the second heat transfer channel;

[0012] An inner shell, wherein the inner shell encloses a chilled chamber, wherein the chilled chamber is configured to place chilled items; the inner shell is disposed inside the outer shell, and the inner shell, the outer shell, the spacer layer and the heat conductor cooperate to form a sealed chamber between the inner shell and the outer shell, wherein the sealed chamber is filled with a liquid medium;

[0013] a door body, the door body being configured to open or cover the refrigeration chamber;

[0014] a temperature detection device, the temperature detection device comprising a first temperature detector and a second temperature detector, the first temperature detector being configured to detect the temperature of the liquid medium, and the second temperature sensor being configured to detect the temperature of the chilled item placed in the chilling chamber;

[0015] A control device is communicatively connected with the temperature detection device, the first damper, and the second damper, and the control device controls the opening and closing of the first damper and the second damper according to a signal fed back by the temperature detection device.

[0016] The refrigerator provided in the embodiment of the present application includes a refrigerator compartment, a freezer compartment and an ice-cooling compartment arranged in the refrigerator compartment, the ice-cooling compartment is used for iced drinks, the refrigerator compartment and the freezer compartment are separated by a spacing layer, a first heat transfer channel is arranged on the spacing layer, a first air door is arranged in the first heat transfer channel, the ice-cooling compartment includes an outer shell, a heat conductor, and an inner shell arranged inside the outer shell, the outer shell is connected to the spacing layer, and the orthographic projection of the outer shell on the spacing layer covers the first heat transfer channel, that is, the first heat transfer channel is connected to the inside of the outer shell, the outer shell is provided with a second heat transfer channel connected to the refrigerator compartment, a second air door is arranged in the second heat transfer channel, and the heat conductor seals the inner shell. The first heat transfer channel and the second heat transfer channel are blocked. The heat conductor is used to transfer heat on the one hand, so as to transfer the coldness of the freezing chamber to the ice-cooling chamber when the first air door is opened, or to transfer the coldness of the ice-cooling chamber to the refrigerating chamber when the second air door is opened. On the other hand, it is used to block the first heat transfer channel and the second heat transfer channel, so that a sealed cavity is formed between the outer shell and the inner shell. The sealed cavity is filled with a liquid medium. The liquid medium can maintain the temperature of the ice-cooling chamber within a certain range for a long time, which is conducive to maintaining the iced items at a relatively constant temperature. The ice-cooling chamber also includes a temperature detection device and a control device. The temperature detection device includes a device for detecting the liquid medium. The first temperature detector is used to detect the temperature of the iced items in the iced chamber, and the second temperature detector is used to detect the temperature of the iced items in the iced chamber. The first temperature detector, the second temperature detector, the first air door, and the second air door are respectively connected to the control device for communication. When the iced items are placed in the iced chamber formed by the inner shell, the control device controls the first air door to open, so that the cold energy of the freezer is transferred to the heat conductor through the first heat transfer channel, and the heat conductor transfers the cold energy to the liquid medium to cool the liquid medium. The temperature of the liquid medium is reduced, so that the temperature in the iced chamber is reduced, and then the temperature of the iced items placed in the iced chamber is reduced, that is, the iced items placed in the iced chamber are cooled. The chilled items can be cooled quickly. In order to prevent the temperature of the liquid medium from being too low, which may cause the chilled items to freeze, when the temperature of the liquid medium drops to a first preset temperature and the chilled items placed in the chilling chamber drop to a second preset temperature, the control device controls the first damper to close and the second damper to open, so as to stop the freezer from transmitting cold energy to the chilling chamber, and to open the chilling chamber to transmit cold energy to the refrigerator. That is, the cold energy of the liquid medium is transferred to the refrigerator through the heat conductor to increase the temperature of the liquid medium, thereby preventing the temperature of the chilled items from continuing to drop and causing the chilled items to freeze. At this time, the cold energy of the chilling chamber is transferred to the refrigerator to cool the refrigerator, thereby avoiding energy waste. The refrigerator provided in the embodiment of the present application sets an chilling chamber in the refrigerator, and the chilled items placed in the chilling chamber can achieve the purpose of rapid cooling, and can avoid the risk of bottles and cans containing chilled items being frozen and cracked.

[0017] In some embodiments of the present application, the heat conductor includes a first heat conductor segment and a second heat conductor segment;

[0018] The first heat conductor segment is embedded in the spacer layer, and the first heat conductor segment blocks the first heat transfer channel;

[0019] The second heat conductor segment is connected to the inner side of the outer shell, and in the direction surrounding the first straight line, both ends of the second heat conductor segment are respectively connected to the first heat conductor segment, and the second heat conductor segment blocks the second heat transfer channel; the first straight line is a straight line perpendicular to the door body and passing through the center of the outer shell;

[0020] The sealed cavity is formed between the heat conductor and the inner shell.

[0021] That is, the heat conductor is arranged around the sealed cavity. In this way, when the first damper is opened, the coldness of the freezer compartment is transferred to the heat conductor, and the coldness is quickly transferred in the heat conductor, so that the overall temperature of the heat conductor is relatively low. Since the heat conductor surrounds the sealed cavity, the temperature of the liquid medium can drop quickly and evenly. Since the liquid medium surrounds the inner shell, the temperature in the ice chamber can drop quickly and evenly. Similarly, when the second damper is opened, the coldness of the liquid medium can be quickly transferred to the refrigerator compartment through the heat conductor, and the temperature of the liquid medium rises evenly everywhere, reducing the uneven temperature distribution in the liquid medium, so that the temperature distribution in the ice chamber is relatively uniform. This arrangement is conducive to better heat transfer of the heat conductor.

[0022] In some embodiments of the present application, the ice chamber is a circular chamber, and the opening of the circular chamber faces the door body;

[0023] The second temperature sensor is mounted on the inner shell and disposed at the lower portion of the circular chamber, and the second temperature detector is in contact with the refrigerated object placed in the refrigeration chamber.

[0024] The icing chamber is configured as a circular chamber, so that when an icy item is placed in the circular chamber, the lower part of the icy item (usually a drink, the bottle or can of the drink is usually round) can contact the lower part of the circular chamber, and the second temperature detector is arranged at the lower part of the icy chamber, so that when the icy item is placed in the circular chamber, the icy item can contact the second temperature detector, so that the second temperature detector can detect the temperature of the icy item more accurately.

[0025] In some embodiments of the present application, the liquid medium is a saline medium.

[0026] The freezing point of the salt water medium is low, and it will not freeze at temperatures below minus ten degrees Celsius. Therefore, when the salt water medium is used as the liquid medium, its temperature can be quickly and evenly reduced to below zero degrees, so that the temperature of the ice-cooling chamber can be quickly reduced, so that the ice-cooling items placed in the ice-cooling chamber can be quickly cooled, and the ice-cooling items are partially in direct contact with the inner shell, and can directly exchange heat with the inner shell, further accelerating the cooling speed of the ice-cooling items; in addition, water has a large specific heat capacity and has a cold storage function. After the ice-cooling is completed, since the ice-cooling chamber is arranged in the cold storage room and has outer shell insulation, the temperature of the salt water medium changes slowly. Therefore, after the ice-cooling is completed, there is no need to repeatedly open the first air door, and the temperature of the ice-cooling items can be maintained within a certain range for a long time.

[0027] In some embodiments of the present application, the outer shell includes a thermal insulation layer.

[0028] The setting of the insulation layer can prevent the cold energy of the heat conductor and the liquid medium from being transferred to the refrigerating chamber and affecting the temperature of the refrigerating chamber. At the same time, it can enable the temperature of the liquid medium to drop rapidly when the first damper is opened, and after the chilling is completed, the temperature of the liquid medium can be maintained within a certain range for a long time.

[0029] In some embodiments of the present application, the ice chamber further comprises a gravity detection device, the gravity detection device is disposed at the lower part of the ice chamber, and the gravity detection device is configured to detect whether iced items are placed in the ice chamber;

[0030] The control device is also in communication connection with the gravity detection device, and the control device controls whether the refrigeration chamber starts the refrigeration mode according to the signal fed back by the gravity detection device.

[0031] The setting of the gravity detection device can detect whether chilled items are placed in the chilling chamber. The gravity detection device is communicatively connected to the control device. When chilled items are placed in the chilling chamber, the gravity detection device feeds back a signal to the control device, and the control device controls the chilling chamber to start the chilling mode. That is to say, the setting of the gravity detection device can enable the refrigerator provided in the embodiment of the present application to automatically identify whether chilled items are placed in the chilling chamber. When chilled items are placed, the refrigerator provided in the embodiment of the present application automatically starts the chilling mode of the chilling chamber, and the control is more intelligent.

[0032] In some embodiments of the present application, the control device is configured to:

[0033] When the refrigerated object is placed in the refrigerated chamber, controlling the first air door to open;

[0034] Determine whether the temperature detected by the first temperature detector drops to a first preset temperature, and whether the temperature detected by the second temperature detector drops to a second preset temperature; if so, control the first damper to be closed; if not, determine again after a first preset time interval, until the first damper is controlled to be closed;

[0035] After the first damper is closed, the temperatures detected by the second temperature detector are recorded three times. Among the three records, the time interval between two adjacent records is not less than the second preset time. In chronological order, it is determined whether the temperatures of the three records decrease successively and are all less than the second preset temperature; if so, the second damper is controlled to open, if not, the refrigeration of the refrigerated items is terminated.

[0036] That is, the control method of the ice-cooling chamber of the refrigerator provided in the embodiment of the present application is that when ice-cooled items are placed in the ice-cooling chamber, the control device controls the first air door to open, so that the coldness of the freezing chamber is transferred to the heat conductor through the first heat transfer channel, and the heat conductor transfers the coldness to the liquid medium to cool the liquid medium. The lowered temperature of the liquid medium reduces the temperature in the ice-cooling chamber, and then reduces the temperature of the ice-cooling items placed in the ice-cooling chamber. At this time, the ice-cooled items placed in the ice-cooling chamber are quickly cooled; after the first air door is opened, the first temperature detector and the second temperature detector feed back the detected temperature signals to the control device, and the control device determines whether the temperature detected by the first temperature detector (the temperature of the liquid medium) drops to the first preset temperature, and whether the temperature detected by the second temperature detector (the temperature of the ice-cooled items) drops to the second preset temperature. When the temperature detected by the first temperature detector drops to the first preset temperature and the temperature detected by the second temperature detector drops to the second preset temperature, it indicates that the temperature of the ice-cooled items has dropped to the preset temperature. The chilling effect has been achieved, and the first air door is closed at this time. If the temperature detected by the first temperature detector has not dropped to the first preset temperature, and / or the temperature detected by the second temperature detector has not dropped to the second preset temperature, then after a first preset time, it is determined again until the first air door is closed; after the first air door is closed, in order to prevent the temperature of the chilled items from continuing to decrease, the temperatures detected by the second temperature detector are recorded three times, and it is determined in chronological order whether the three recorded temperatures decrease successively and are all less than the second preset temperature. If not, the temperature of the chilled items is not continuing to decrease, and the chilling of the chilled items is completed. Under the action of the liquid medium, the chilled items can be maintained within a certain temperature range for a long time; if so, it means that the temperature of the chilled items continues to decrease. In order to ensure the taste of the chilled items and prevent the chilled items from freezing, the control device controls the second air door to open, so that the coldness of the liquid medium is transferred to the refrigerating chamber through the heat conductor to increase the temperature of the liquid medium, thereby preventing the temperature of the chilled items from continuing to decrease and causing the chilled items to freeze. The ice-cooling chamber provided in the embodiment of the present application can quickly cool the iced items, and also has an ice-cooling overcooling protection function, which can effectively reduce the freezing of the iced items.

[0037] In some embodiments of the present application, the temperature detection device further includes a third temperature detector, the third temperature detector is disposed in the refrigerating chamber, and the third temperature detector is configured to detect the temperature of the refrigerating chamber;

[0038] The control device is further configured to, when the refrigerated object is placed in the refrigerated chamber, control the first air door to open further comprising:

[0039] When the refrigerated items are placed in the refrigerated chamber, it is determined whether the temperature detected by the third temperature detector reaches the refrigeration stop temperature of the refrigerating chamber or is below the refrigeration stop temperature of the refrigerating chamber; if not, the first damper is controlled to open; if so, it is determined again after a third preset time interval until the first damper is controlled to open.

[0040] In this way, when the temperature detected by the third temperature detector (the temperature of the cold storage chamber) reaches the refrigeration stop temperature point of the cold storage chamber or reaches below the refrigeration stop temperature point of the cold storage chamber, if the first air door is opened, the temperature of the cold storage chamber may further drop, and further may cause the items placed in the cold storage chamber to be frozen. Therefore, the ice-cooling chamber of the refrigerator provided in the embodiment of the present application opens the first air door only when the temperature of the cold storage chamber is higher than the refrigeration stop temperature point of the cold storage chamber.

[0041] In some embodiments of the present application, the control device is further configured to, after the first damper is closed, record the temperature detected by the second temperature detector three times, wherein the time interval between two adjacent records is not less than the second preset time, and determine in chronological order whether the temperatures of the three records decrease successively and are all less than the second preset temperature; if so, control the second damper to open, and if not, the icing ends and further includes:

[0042] After controlling the second air damper to open, the temperatures detected by the second temperature detector are recorded three times, and in the three records, the time interval between two adjacent records is not less than a fourth preset time, and whether the three recorded temperatures decrease successively and are all less than the second preset temperature in chronological order; if not, the second air damper is controlled to be closed, and the chilling of the chilled items is completed; if so, the process of recording the temperatures detected by the second temperature detector three times is repeated, and whether the three recorded temperatures decrease successively and are all less than the second preset temperature in chronological order is determined until the second air damper is controlled to be closed.

[0043] After the second air damper is opened, the cold energy of the liquid medium is transferred to the cold storage chamber through the heat conductor, and the temperature of the liquid medium gradually increases. The temperatures detected by the second temperature detector are recorded three times in chronological order. If the three recorded temperatures decrease successively and are all less than the second preset temperature, the cold energy of the liquid medium continues to be transferred to the cold storage chamber. If the three recorded temperatures no longer satisfy the relationship of decreasing successively, and / or the three recorded temperatures are no longer all less than the second preset temperature, it means that the temperature of the chilled items no longer continues to drop. Then the second air damper is closed so that the cold energy of the liquid medium is no longer transferred to the cold storage chamber. After the second air damper is closed, the temperature of the liquid medium tends to be balanced with the temperature of the chilled items. Based on the large specific heat capacity of the liquid medium, the constant temperature insulation function can continue to be provided for the chilled items, so that the chilled items can be maintained within a certain range for a long time.

[0044] In some embodiments of the present application, the control device is further configured to control the refrigeration function of the refrigerating chamber to be turned off when the first damper is controlled to be opened.

[0045] Because when the first air door is opened, during the process of the cold energy of the freezer compartment being transferred to the liquid medium, part of the cold energy will diffuse into the refrigerator compartment through the outer shell of the ice-cooling compartment, slowly assisting in cooling the refrigerator compartment. In order to avoid overcooling of the refrigerator compartment, and the relatively high temperature of the refrigerator compartment can create conditions for the subsequent activation of the overcooling protection function of the ice-cooling compartment, when the ice-cooling mode is activated in the ice-cooling compartment, the refrigeration function of the refrigerator compartment is turned off. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the implementation methods in the embodiments of the present application or the related technologies, the following is a brief introduction to the drawings required for use in the embodiments or the related technology descriptions. Obviously, the drawings described below are some embodiments of the present application, and a person skilled in the art can also obtain other drawings based on these drawings.

[0047] Figure 1 A schematic diagram of the structure of a refrigerator provided in an embodiment of the present application;

[0048] Figure 2 A control flow chart of a refrigerator provided in an embodiment of the present application.

[0049] 100. Refrigerator;

[0050] 110. a third temperature detector;

[0051] 200. Freezer;

[0052] 300, spacer layer;

[0053] 310, first heat transfer channel; 320, first air door;

[0054] 400, Ice Room;

[0055] 410, outer shell; 420, inner shell; 430, heat conductor; 440, liquid medium; 450, second temperature detector; 460, gravity detection device; 470, first temperature detector;

[0056] 411. A second heat transfer channel; 412. A second air door;

[0057] 421, ice chamber;

[0058] 431, a first heat conductor segment; 432, a second heat conductor segment;

[0059] 500. Chilled items. DETAILED DESCRIPTION

[0060] The refrigerator includes a refrigerator and a freezer. The temperature of the refrigerator is between 0℃-10℃, and it is mainly used to store vegetables, fruits, etc. The temperature of the freezer is around -18℃, and it is mainly used to store fish, meat, etc. When users use the refrigerator to chill drinks, they usually place the drinks in the refrigerator or freezer. However, since the temperature of the refrigerator is relatively high, the chilling speed of the drinks placed in the refrigerator is too slow, which makes it difficult to meet the user's demand for rapid cooling; and the temperature of the refrigerator is relatively low, and the chilling time of the drinks placed in the freezer is difficult to control. If the time is too short, it is difficult to achieve the chilling effect, and if the time is too long, there is a risk of freezing and cracking the bottle or can of the drink.

[0061] In view of this, the embodiment of the present application provides an ice cooling chamber in the cold storage chamber, the ice cooling chamber is connected to the partition layer separating the cold storage chamber and the freezer chamber, the partition layer is provided with a first heat transfer channel, a first air damper is provided in the first heat transfer channel, the cold in the freezer chamber can be transferred to the ice cooling chamber through the first heat transfer channel and the first air damper, so as to achieve the purpose of quickly cooling the iced items placed in the ice cooling chamber, a second heat transfer channel is provided on the outer shell of the ice cooling chamber, a second air damper is provided in the second heat transfer channel, when the ice cooling chamber is overcooled, the cold in the ice cooling chamber can be transferred to the cold storage chamber through the second heat transfer channel and the second air damper, so as to avoid the risk of bottles and cans of iced items placed in the ice cooling chamber being frozen and cracked.

[0062] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0063] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0064] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0065] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0066] like Figure 1 As shown, the refrigerator provided by the embodiment of the present application includes a refrigerating chamber 100, a freezing chamber 200 and an ice-cooling chamber 400 arranged in the refrigerating chamber 100. The refrigerating chamber 100 and the freezing chamber 200 are separated by a spacer layer 300. The spacer layer 300 is provided with a first heat transfer channel 310. A first damper 320 is arranged in the first heat transfer channel 310. The ice-cooling chamber 400 is arranged in the refrigerating chamber 100. The ice-cooling chamber 400 is used to cool beverages, etc. The ice-cooling chamber 400 includes an outer shell 410, a heat conductor 430, and an inner shell 420 arranged inside the outer shell 410. The outer shell 410 is connected to the spacer layer 300, and the orthographic projection of the outer shell 410 on the spacer layer 300 covers the first heat transfer channel 310, that is, the first heat transfer channel 310 is connected to the inner area of ​​the outer shell 410 (the sealed cavity described below). The outer shell 410 is provided with a second heat transfer channel 411, which is in communication with the refrigerating chamber 100, and a second damper 412 is provided in the second heat transfer channel 411. The heat conductor 430 blocks the first heat transfer channel 310 and the second heat transfer channel 411. The heat conductor 430 is used to transfer heat on the one hand, so as to transfer the coldness of the freezing chamber 200 to the ice chamber 400 when the first damper 320 is opened, or to transfer the coldness of the ice chamber 400 to the refrigerating chamber 100 when the second damper 412 is opened, and on the other hand, to block the first heat transfer channel 310 and the second heat transfer channel 411, so that a sealed cavity is formed between the outer shell 410 and the inner shell 420, and a liquid medium 440 is filled in the sealed cavity. The liquid medium 440 can maintain the temperature of the ice chamber 400 within a certain range for a long time, which is conducive to maintaining the iced items 500 at a relatively constant temperature. That is, the inner shell 420 , the outer shell 410 , the spacer layer 300 and the heat conductor 430 cooperate to form a sealed cavity between the inner shell 420 and the outer shell 410 , and the sealed cavity is filled with a liquid medium 440 .

[0067] In the embodiment of the present application, the inner shell 420 encloses a chilled chamber 421, and the chilled chamber 421 is configured to place chilled items 500, that is, the chilled items 500 are placed in the chilled chamber 421 for chilling. The refrigerating chamber 100 further includes a door body, which is configured to open or cover the chilled chamber 421. When the door body is covered on the chilled chamber 421, the chilled chamber 421 is a sealed cavity, thereby allowing the chilled chamber 421 to be maintained within a certain temperature range.

[0068] In the embodiment of the present application, the ice chamber 400 further includes a temperature detection device and a control device. The temperature detection device includes a first temperature detector 470 and a second temperature detector 450. The first temperature detector 470 is configured to detect the temperature of the liquid medium 440, and the second temperature sensor is configured to detect the temperature of the iced item 500 placed in the ice chamber 421. The control device is in communication connection with the temperature detection device, the first damper 320 and the second damper 412. The control device controls the opening and closing of the first damper 320 and the second damper 412 according to the signal fed back by the temperature detection device.

[0069] In the embodiment of the present application, when the iced item 500 is placed in the ice chamber 421, the control device controls the first air door 320 to open, so that the cold energy of the freezing chamber 200 is transferred to the heat conductor 430 through the first heat transfer channel 310, and the heat conductor 430 transfers the cold energy to the liquid medium 440, so that the liquid medium 440 is cooled down. The temperature of the liquid medium 440 is reduced, so that the temperature in the ice chamber 421 is reduced, and then the temperature of the iced item 500 placed in the ice chamber 421 is reduced, that is, the iced item 500 placed in the ice chamber 400 can be cooled quickly. In order to avoid the temperature of the liquid medium 440 being too low, which causes the iced item 500 to freeze, the liquid medium 440 is cooled. When the temperature of the medium 440 drops to the first preset temperature, and the iced article 500 placed in the ice chamber 421 drops to the second preset temperature, the control device controls the first damper 320 to close and the second damper 412 to open, so as to stop the freezing chamber 200 from transmitting cold to the ice chamber 400, and open the ice chamber 400 to transmit cold to the refrigerating chamber 100, that is, the cold of the liquid medium 440 is transferred to the refrigerating chamber 100 through the heat conductor 430 to increase the temperature of the liquid medium 440, thereby preventing the temperature of the iced article 500 from continuing to drop and causing the iced article 500 to freeze. At this time, the cold of the ice chamber 400 is transferred to the refrigerating chamber 100 to cool the refrigerating chamber 100, thereby avoiding energy waste. The refrigerator provided in the embodiment of the present application can achieve the purpose of rapid cooling by arranging the ice chamber 400 in the refrigerating chamber 100, and can avoid the risk of the bottle and can body containing the iced article 500 being frozen and cracked. That is to say, the ice-cooling chamber 400 provided in the embodiment of the present application can quickly cool the ice-cooled items 500, and also has an ice-cooling overcooling protection function, which can effectively reduce the freezing of the ice-cooled items 500.

[0070] In some embodiments of the present application, the heat conductor 430 includes a first heat conductor segment 431 and a second heat conductor segment 432, the first heat conductor segment 431 is embedded in the spacer layer 300, the first heat conductor segment 431 blocks the first heat transfer channel 310, the second heat conductor segment 432 is connected to the inner side of the outer shell 410, and in the direction surrounding the first straight line, the two ends of the second heat conductor segment 432 are respectively connected to the first heat conductor segment 431, and the second heat conductor segment 432 blocks the second heat transfer channel 411. The first straight line is a straight line perpendicular to the door body and passing through the center of the outer shell 410. That is, the heat conductor 430 includes two parts, one part of the heat conductor 430 is arranged on the side of the spacer layer 300 facing the outer shell 410, and is located in the area covered by the orthographic projection of the outer shell 410 on the spacer layer 300, and this part of the heat conductor 430 blocks the first heat transfer channel 310, and the other part of the heat conductor 430 is arranged on the inner side of the outer shell 410, and this part of the heat conductor 430 blocks the second heat transfer channel 411. That is, the heat conductor 430 is arranged around the sealed cavity, and the sealed cavity is formed between the heat conductor 430 and the inner shell 420. This arrangement enables the coldness of the freezing chamber 200 to be transferred to the heat conductor 430 when the first damper 320 is opened, and the coldness is quickly transferred in the heat conductor 430, so that the temperature of the heat conductor 430 as a whole is relatively low. Since the heat conductor 430 surrounds the sealed cavity, the temperature of the liquid medium 440 can be quickly and evenly reduced. Since the liquid medium 440 surrounds the inner shell 420, the temperature in the ice chamber 421 can be quickly and evenly reduced. Similarly, when the second damper 412 is opened, the coldness of the liquid medium 440 can be quickly transferred to the refrigerating chamber 100 through the heat conductor 430, and the temperature of the liquid medium 440 rises evenly everywhere, reducing the uneven temperature distribution in the liquid medium 440, so that the temperature distribution in the ice chamber 421 is relatively uniform. This arrangement is conducive to better heat transfer of the heat conductor 430.

[0071] In some other embodiments of the present application, the structure of the heat conductor 430 can also be that the heat conductor 430 includes a first heat conductor segment 431 and a second heat conductor segment 432, the first heat conductor segment 431 is embedded in the spacer layer 300, the first heat conductor segment 431 blocks the first heat transfer channel 310, both ends of the first heat conductor segment 431 are bent into the sealed cavity and extend into the liquid medium 440, the second heat conductor segment 432 is embedded in the outer shell 410, the second heat conductor segment 432 blocks the second heat transfer channel 411, and both ends of the second heat conductor segment 432 are bent into the sealed cavity and extend into the liquid medium 440.

[0072] Of course, the structure of the heat conductor 430 may also be in other forms, which will not be described in detail here.

[0073] In some embodiments of the present application, the ice chamber 421 is a circular chamber, the opening of the circular chamber faces the door body, the second temperature sensor is installed on the inner shell 420, and is arranged at the lower part of the circular chamber, and the second temperature detector 450 contacts the iced object 500 placed in the ice chamber 421. The ice chamber 421 is set as a circular chamber, so that when the iced object 500 is placed in the circular chamber, the lower part of the iced object 500 (usually a drink, the bottle or can of the drink is usually round) can contact the lower part of the circular chamber, and the second temperature detector 450 is arranged at the lower part of the ice chamber 421, so that when the iced object 500 is placed in the circular chamber, the iced object 500 can contact the second temperature detector 450, so that the second temperature detector 450 can detect the temperature of the iced object 500 more accurately.

[0074] For example, in some embodiments of the present application, the liquid medium 440 is a salt water medium. The freezing point of the salt water medium is low, and it will not freeze at more than ten degrees below zero. Therefore, when the salt water medium is used as the liquid medium 440, its temperature can be quickly and evenly reduced to below zero, so that the temperature of the ice chamber 421 can be quickly reduced, so that the iced items 500 placed in the ice chamber 421 can be quickly cooled, and part of the iced items 500 is in direct contact with the inner shell 420, and it can directly exchange heat with the inner shell 420, further accelerating the iced speed of the iced items 500; in addition, water has a large specific heat capacity and has a cold storage function. After the ice is finished, since the ice chamber 400 is arranged in the refrigerating chamber 100 and has an outer shell insulation, the temperature of the salt water medium changes slowly, so that after the ice is finished, there is no need to repeatedly open the first air door 320, and the temperature of the iced items 500 can also be maintained within a certain range for a long time.

[0075] In some embodiments of the present application, the heat conductor 430 and the inner shell 420 are both made of aluminum alloy composite materials with high thermal conductivity. For example, an anti-corrosion layer is provided on the side of the heat conductor 430 facing the sealed cavity and on the side of the inner shell 420 facing the sealed cavity.

[0076] In some embodiments of the present application, the outer shell 410 includes a heat-insulating layer. The provision of the heat-insulating layer can prevent the coldness of the heat conductor 430 and the liquid medium 440 from being transferred to the refrigerating chamber 100, thereby affecting the temperature of the refrigerating chamber 100, and can also enable the temperature of the liquid medium 440 to drop rapidly when the first damper 320 is opened, and after the icing is completed, the temperature of the liquid medium 440 can be maintained within a certain range for a long time.

[0077] Please continue reading Figure 1The ice chamber 400 further includes a gravity detection device 460, which is disposed at the lower part of the ice chamber 421 and configured to detect whether an iced item 500 is placed in the ice chamber 421. The control device is also in communication connection with the gravity detection device 460, and the control device controls whether the ice chamber 400 starts the ice mode according to the signal fed back by the gravity detection device 460. The setting of the gravity detection device 460 can detect whether the chilled item 500 is placed in the chilled chamber 421. The gravity detection device 460 is communicated with the control device. When the chilled item 500 is placed in the chilled chamber 421, the gravity detection device 460 feeds back a signal to the control device, and the control device controls the chilled chamber 400 to start the chilled mode. That is to say, the setting of the gravity detection device 460 can enable the refrigerator provided in the embodiment of the present application to automatically identify whether the chilled item 500 is placed in the chilled chamber 421. When the chilled item 500 is placed, the refrigerator provided in the embodiment of the present application automatically starts the chilled mode of the chilled chamber 400, and the control is more intelligent.

[0078] Illustratively, the refrigeration chamber 400 provided in the embodiment of the present application also includes a buzzer prompt device, which is communicatively connected to the control device. After the refrigerated items 500 placed in the refrigeration chamber 421 are completely refrigerated, the control device controls the buzzer prompt device to emit a sound to prompt the user that the refrigeration is complete.

[0079] Illustratively, the cooling chamber 400 provided in the embodiment of the present application further includes a display device, which is communicatively connected to the control device. After the cooling items 500 placed in the cooling chamber 421 are completely cooled, the display device displays the completion of cooling to facilitate user viewing.

[0080] In some embodiments of the present application, the control device is configured to execute the following program:

[0081] S100: When refrigerated items are placed in the refrigeration chamber, the first air door is controlled to open.

[0082] When chilled items are placed in the chilling chamber, the control device controls the first damper to open, so that the cold in the freezer is transferred to the heat conductor through the first heat transfer channel, and the heat conductor transfers the cold to the liquid medium to cool the liquid medium. The lowered temperature of the liquid medium reduces the temperature in the chilling chamber, thereby reducing the temperature of the chilled items in the chilling chamber. At this time, the chilled items in the chilling chamber are quickly cooled.

[0083] In some embodiments of the present application, the temperature detection device further includes a third temperature detector, which is disposed in the refrigerating chamber and configured to detect the temperature of the refrigerating chamber. Since the refrigeration of the ice chamber will affect the temperature of the refrigerating chamber, in order to prevent the temperature of the refrigerating chamber from being too low, resulting in the items placed in the refrigerating chamber being frozen, the control device is further configured to, when the refrigerated items are placed in the refrigerating chamber, control the first damper to open and further include:

[0084] When refrigerated items are placed in the refrigeration chamber, it is determined whether the temperature detected by the third temperature detector reaches the refrigeration stop temperature point of the refrigeration chamber or is below the refrigeration stop temperature point of the refrigeration chamber. If not, the first air door is controlled to open. If so, it is determined again after a third preset time until the first air door is controlled to open.

[0085] When the temperature detected by the third temperature detector (the temperature of the cold storage chamber) reaches the refrigeration stop temperature point of the cold storage chamber or reaches below the refrigeration stop temperature point of the cold storage chamber, if the first air door is opened, the temperature of the cold storage chamber may further drop, and further may cause the items placed in the cold storage chamber to be frozen. Therefore, the ice-cooling chamber of the refrigerator provided in the embodiment of the present application opens the first air door when the temperature of the cold storage chamber is higher than the refrigeration stop temperature point of the cold storage chamber.

[0086] Exemplarily, the third preset time is 30 seconds.

[0087] In some embodiments of the present application, when the first damper is opened, during the process of transferring the coldness of the freezing chamber to the liquid medium, part of the coldness will diffuse into the refrigerating chamber through the outer shell of the ice-cooling chamber, slowly assisting the refrigeration of the refrigerating chamber. In order to avoid the refrigerating chamber from being overcooled, and the relatively high temperature of the refrigerating chamber can create conditions for the subsequent activation of the overcooling protection function of the ice-cooling chamber, when the ice-cooling chamber activates the ice-cooling mode, the refrigeration function of the refrigerating chamber is turned off. That is, the control device is further configured to control the refrigerating function of the refrigerating chamber to be turned off when the first damper is controlled to be opened.

[0088] S200, determine whether the temperature detected by the first temperature detector drops to a first preset temperature, and whether the temperature detected by the second temperature detector drops to a second preset temperature; if so, control the first damper to be closed; if not, determine again after a first preset time, until the first damper is controlled to be closed.

[0089] After the first damper is opened, the first temperature detector and the second temperature detector feed back the detected temperature signals to the control device, and the control device determines whether the temperature detected by the first temperature detector (the temperature of the liquid medium) has dropped to the first preset temperature, and whether the temperature detected by the second temperature detector (the temperature of the chilled item) has dropped to the second preset temperature. Usually, the first preset temperature is lower than the second preset temperature because the temperature drop rate of the liquid medium is greater than the temperature drop rate of the chilled item. When the temperature detected by the first temperature detector drops to the first preset temperature and the temperature detected by the second temperature detector drops to the second preset temperature, it indicates that the temperature of the chilled item has dropped to the preset temperature and the chilling effect has been achieved. At this time, the first damper is closed. If the temperature detected by the first temperature detector has not dropped to the first preset temperature, and / or the temperature detected by the second temperature detector has not dropped to the second preset temperature, then the judgment is made again after a first preset time until the first damper is closed.

[0090] Exemplarily, the first preset temperature is -2°C, the second preset temperature is 0°C, and the first preset time is 30 seconds.

[0091] S300. After the first air door is closed, the temperatures detected by the second temperature detector are recorded three times. Among the three records, the time interval between two adjacent records is not less than the second preset time. In chronological order, it is determined whether the temperatures of the three records decrease successively and are all less than the second preset temperature; if so, the second air door is controlled to open, if not, the refrigeration of the refrigerated items is terminated.

[0092] In the three records, the time interval between two adjacent records is not less than the second preset time, because if the time interval between two adjacent records in the three records is too small, the temperature change detected by the second temperature detector in the two adjacent records will be small, reducing the accuracy of the judgment. Exemplarily, the second preset time is 2 minutes, of course, it can also be 1 minute.

[0093] After the first damper is closed, in order to prevent the temperature of the chilled item from continuing to decrease, the temperature detected by the second temperature detector is recorded three times, and it is determined in chronological order whether the three recorded temperatures decrease successively and are all less than the second preset temperature. If not, the temperature of the chilled item is not continuing to decrease, and the chilling of the chilled item is completed. Under the action of the liquid medium, the chilled item can be maintained within a certain temperature range for a long time; if yes, it means that the temperature of the chilled item continues to decrease. In order to ensure the taste of the chilled item and prevent the chilled item from freezing, the control device controls the second damper to open, so that the coldness of the liquid medium is transferred to the refrigerating chamber through the heat conductor to increase the temperature of the liquid medium, thereby preventing the temperature of the chilled item from continuing to decrease and causing the chilled item to freeze. Therefore, the chilling chamber provided in the embodiment of the present application can quickly cool the chilled items, and also has a chilling overcooling protection function, which can effectively reduce the freezing of the chilled items.

[0094] Exemplarily, after the first damper is closed, when recording the temperature detected by the second temperature detector three times, the temperature is recorded once every 2 minutes for three consecutive times.

[0095] In some embodiments of the present application, the control device is further configured to, after the first damper is closed, record the temperature detected by the second temperature detector three times, in which the time interval between two adjacent records is not less than the second preset time, and judge in chronological order whether the temperatures of the three records decrease successively and are all less than the second preset temperature; if so, control the second damper to open, and if not, the icing ends and further includes:

[0096] After controlling the second air damper to open, the temperatures detected by the second temperature detector are recorded three times. Among the three records, the time interval between two adjacent records is not less than the fourth preset time. In chronological order, it is determined whether the three recorded temperatures decrease successively and are all less than the second preset temperature; if not, the second air damper is controlled to be closed, and the chilling of the refrigerated items is completed; if so, the process of recording the temperatures detected by the second temperature detector three times is repeated, and in chronological order, it is determined whether the three recorded temperatures decrease successively and are all less than the second preset temperature, until the second air damper is controlled to be closed.

[0097] After the second air damper is opened, the cold energy of the liquid medium is transferred to the cold storage chamber through the heat conductor, and the temperature of the liquid medium gradually increases. The temperatures detected by the second temperature detector are recorded three times in chronological order. If the three recorded temperatures decrease successively and are all less than the second preset temperature, the cold energy of the liquid medium continues to be transferred to the cold storage chamber. If the three recorded temperatures no longer satisfy the relationship of decreasing successively, and / or the three recorded temperatures are no longer all less than the second preset temperature, it means that the temperature of the chilled items no longer continues to drop. Then the second air damper is closed so that the cold energy of the liquid medium is no longer transferred to the cold storage chamber. After the second air damper is closed, the temperature of the liquid medium tends to be balanced with the temperature of the chilled items. Based on the large specific heat capacity of the liquid medium, the constant temperature insulation function can continue to be provided for the chilled items, so that the chilled items can be maintained within a certain range for a long time.

[0098] Exemplarily, the fourth preset time is 2 minutes, but it may also be 1 minute.

[0099] Exemplarily, after the second damper is controlled to open, the temperature detected by the second temperature detector is recorded three times, once every 2 minutes, and three times in succession.

[0100] That is to say, Figure 2 As shown, the refrigerator control method provided in the embodiment of the present application includes:

[0101] S100, Chilled mode on.

[0102] When refrigerated items are placed in the refrigeration chamber, it is determined whether the temperature detected by the third temperature detector reaches the refrigeration stop temperature point of the refrigeration chamber or is below the refrigeration stop temperature point of the refrigeration chamber. If not, the first air door is controlled to open. If so, it is determined again after a third preset time until the first air door is controlled to open.

[0103] S200, the chilling mode is executed.

[0104] Determine whether the temperature detected by the first temperature detector drops to a first preset temperature, and whether the temperature detected by the second temperature detector drops to a second preset temperature; if so, control the first damper to be closed; if not, determine again after a first preset time interval until the first damper is controlled to be closed;

[0105] S300, overcooling protection of the ice chamber.

[0106] After the first air damper is closed, the temperatures detected by the second temperature detector are recorded three times. Among the three records, the time interval between two adjacent records is not less than the second preset time. In chronological order, it is determined whether the temperatures of the three records decrease successively and are all less than the second preset temperature; if so, the second air damper is controlled to open, if not, the refrigeration of the refrigerated items is terminated.

[0107] After controlling the second air damper to open, the temperatures detected by the second temperature detector are recorded three times. Among the three records, the time interval between two adjacent records is not less than the fourth preset time. In chronological order, it is determined whether the three recorded temperatures decrease successively and are all less than the second preset temperature; if not, the second air damper is controlled to be closed, and the chilling of the refrigerated items is completed; if so, the process of recording the temperatures detected by the second temperature detector three times is repeated, and in chronological order, it is determined whether the three recorded temperatures decrease successively and are all less than the second preset temperature, until the second air damper is controlled to be closed.

[0108] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0109] For the convenience of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. A refrigerator, characterized in that: include: A refrigerating chamber and a freezing chamber, wherein the refrigerating chamber and the freezing chamber are separated by a spacer layer, the spacer layer is provided with a first heat transfer channel, and a first damper is provided in the first heat transfer channel; An ice-cooling chamber, the ice-cooling chamber being arranged in the refrigerating chamber; The ice chamber comprises: an outer shell, the outer shell being connected to the spacer layer, and the orthographic projection of the outer shell on the spacer layer covering the first heat transfer channel, the outer shell being provided with a second heat transfer channel, the second heat transfer channel being in communication with the refrigerating chamber, and a second damper being provided in the second heat transfer channel; a heat conductor, the heat conductor blocking the first heat transfer channel and the second heat transfer channel; An inner shell, wherein the inner shell encloses a chilled chamber, wherein the chilled chamber is configured to place chilled items; the inner shell is disposed inside the outer shell, and the inner shell, the outer shell, the spacer layer and the heat conductor cooperate to form a sealed chamber between the inner shell and the outer shell, wherein the sealed chamber is filled with a liquid medium; a door body, the door body being configured to open or cover the refrigeration chamber; a temperature detection device, the temperature detection device comprising a first temperature detector and a second temperature detector, the first temperature detector being configured to detect the temperature of the liquid medium, and the second temperature sensor being configured to detect the temperature of the chilled item placed in the chilling chamber; A control device is communicatively connected with the temperature detection device, the first damper, and the second damper, and the control device controls the opening and closing of the first damper and the second damper according to a signal fed back by the temperature detection device.

2. The refrigerator according to claim 1, characterized in that: The heat conductor comprises a first heat conductor segment and a second heat conductor segment; The first heat conductor segment is embedded in the spacer layer, and the first heat conductor segment blocks the first heat transfer channel; The second heat conductor segment is connected to the inner side of the outer shell, and in the direction surrounding the first straight line, both ends of the second heat conductor segment are respectively connected to the first heat conductor segment, and the second heat conductor segment blocks the second heat transfer channel; the first straight line is a straight line perpendicular to the door body and passing through the center of the outer shell; The sealed cavity is formed between the heat conductor and the inner shell.

3. The refrigerator according to claim 1, characterized in that: The ice chamber is a circular chamber, and the opening of the circular chamber faces the door body; The second temperature sensor is mounted on the inner shell and disposed at the lower portion of the circular chamber, and the second temperature detector is in contact with the refrigerated object placed in the refrigeration chamber.

4. The refrigerator according to claim 1, characterized in that: The liquid medium is a saline medium.

5. The refrigerator according to claim 1, characterized in that: The outer shell includes a heat-insulating layer.

6. The refrigerator according to claim 1, characterized in that: The ice chamber further comprises a gravity detection device, which is disposed at the lower part of the ice chamber, and is configured to detect whether iced items are placed in the ice chamber; The control device is also in communication connection with the gravity detection device, and the control device controls whether the refrigeration chamber starts the refrigeration mode according to the signal fed back by the gravity detection device.

7. The refrigerator according to any one of claims 1 to 6, characterized in that: The control device is configured to: When the refrigerated object is placed in the refrigerated chamber, controlling the first air door to open; Determining whether the temperature detected by the first temperature detector drops to a first preset temperature, and whether the temperature detected by the second temperature detector drops to a second preset temperature; If yes, the first damper is controlled to be closed; if no, the judgment is repeated after a first preset time, until the first damper is controlled to be closed; After the first damper is closed, the temperatures detected by the second temperature detector are recorded three times. Among the three records, the time interval between two adjacent records is not less than the second preset time. In chronological order, it is determined whether the temperatures of the three records decrease successively and are all less than the second preset temperature; if so, the second damper is controlled to open, if not, the refrigeration of the refrigerated items is terminated.

8. The refrigerator according to claim 7, characterized in that: The temperature detection device further includes a third temperature detector, the third temperature detector is disposed in the refrigerating chamber, and the third temperature detector is configured to detect the temperature of the refrigerating chamber; The control device is further configured to, when the refrigerated object is placed in the refrigerated chamber, control the first air door to open further comprising: When the refrigerated items are placed in the refrigerated chamber, it is determined whether the temperature detected by the third temperature detector reaches the refrigeration stop temperature of the refrigerating chamber or is below the refrigeration stop temperature of the refrigerating chamber; if not, the first damper is controlled to open; if so, it is determined again after a third preset time interval until the first damper is controlled to open.

9. The refrigerator according to claim 7, characterized in that: The control device is further configured to record the temperature detected by the second temperature detector three times after the first damper is closed, wherein the time interval between two adjacent records is not less than the second preset time, and judge in chronological order whether the temperatures of the three records decrease successively and are all less than the second preset temperature; if so, control the second damper to open; if not, the icing ends and further comprises: After controlling the second air damper to open, the temperatures detected by the second temperature detector are recorded three times, and in the three records, the time interval between two adjacent records is not less than a fourth preset time, and whether the three recorded temperatures decrease successively and are all less than the second preset temperature in chronological order; if not, the second air damper is controlled to be closed, and the chilling of the chilled items is completed; if so, the process of recording the temperatures detected by the second temperature detector three times is repeated, and whether the three recorded temperatures decrease successively and are all less than the second preset temperature in chronological order is determined until the second air damper is controlled to be closed.

10. The refrigerator according to claim 7, characterized in that: The control device is further configured to control the refrigeration function of the refrigerating chamber to be turned off when the first damper is controlled to be opened.

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