TWI664384B - Refrigerator - Google Patents

Abstract

A refrigerator includes a heat-insulating box, a space-defining panel group, a cooling unit, a first-rate track unit, and a switch control unit. The heat-insulating box defines a receiving chamber. The space-defining plate group has two plate members, and the plate members are spaced from each other in the storage chamber, and together with the storage chamber, a micro-freezing chamber is defined. The cooling unit is disposed in the heat-insulating box and generates a cold wind. The flow channel unit is arranged in the heat insulation box, and is connected to the cooling unit and the storage chamber to transport cold air into the storage chamber. The flow channel unit also has a main opening and a pair of openings, and passes through the main opening and the auxiliary The opening is in communication with the freezing chamber to convey cold air into the freezing chamber. The switch control unit is disposed in the flow channel unit and controls whether the cold air in the flow channel unit enters the freezing chamber through the main opening and / or the sub opening.

Description

refrigerator

The invention relates to a refrigerator, in particular to a refrigerator related to the temperature control of a freezer compartment.

With the advancement of smart technology, the control of refrigerators for temperature and humidity is becoming more and more precise. Therefore, according to the characteristics of humidity and temperature required for different foods, the space in refrigerators today can be roughly divided into cold storage rooms, fruits and vegetables from top to bottom. Chamber and freezer, when the food is stored in the correct area, the food can maintain its original freshness for a certain period of time. Among them, the current refrigerating compartment is different from the past, and a micro-freezing compartment with a temperature between the refrigerating temperature and the freezing temperature is also planned. The cold wind of temperature keeps alternative ingredients.

However, in the past, the freezing chamber sent cold air only by a single main opening. When the temperature of the freezing chamber reached a preset temperature, the refrigerator closed the main opening to prevent cold air from flowing in again. In the case that the freezing chamber is not continuously fed with cold air, the insulation between the freezing chamber and the refrigerating chamber is not used, so that the temperature in the freezing chamber easily rises quickly and is higher than its preset temperature. The refrigerator needs to open the main opening again to send cold air to the freezer compartment, which causes the refrigerator to open and close the main opening frequently. Cause more energy consumption. In addition, because the refrigerator only blows cold air to the freezing chamber through a single main opening, and the aperture of the main opening needs to be matched with the temperature design, the cooling chamber not only slows down the temperature, increases the power consumption, but also because The cold air entering the freezing chamber needs to be sent to the lower vegetable and fruit room through the ventilation openings on the lower sides of the freezing chamber. Therefore, the position of the main opening is adjacent to the ventilation opening on one side, but this design leads to the freezing chamber. The temperature of the air near one side of the main opening is low, and the temperature of the air far from one side of the main opening is high, which makes the temperature in the freezing chamber uneven.

Therefore, an object of the present invention is to provide a refrigerator that slows down the temperature of the freezer compartment, thereby reducing the probability of food spoilage placed in the freezer compartment, and simultaneously achieving the power saving effect.

Therefore, the refrigerator according to the present invention includes a heat-insulating box, a space-defining panel group, a cooling unit, a flow path unit, and a switch control unit. The heat-insulating box defines a receiving chamber. The space-defining plate group has two plate members, and the plate members are spaced from each other in the storage chamber, and define a micro-freezing chamber together with the storage chamber. The cooling unit is disposed in the heat insulation box and generates a cold wind. A flow channel unit is disposed in the heat insulation box, and is connected to the cooling unit and the storage chamber to convey the cold air into the storage chamber. The flow channel unit also has a main opening and a pair of openings, and The main opening and the auxiliary opening communicate with the freezing chamber to transport the cold air into the freezing chamber. Should open The off control unit is disposed on the flow channel unit and controls whether the cold air in the flow channel unit enters the freezing chamber through the main opening and / or the auxiliary opening.

In some embodiments, the main opening and the auxiliary opening are arranged horizontally and spaced apart from each other on two opposite sides above the freezing chamber.

In some embodiments, the refrigerator further includes a storage box, which is placed in the freezer compartment and includes a bottom wall and a surrounding wall formed by the bottom wall extending upward. The bottom wall abuts against the refrigerator. The lower one of the plate members, the height of the surrounding wall adjacent to the main opening and the auxiliary opening is lower than that of the main opening and the auxiliary opening, so that the output from the main opening and the auxiliary opening is lower. Cold wind can flow directly into the storage box.

In some embodiments, the refrigerator further includes a temperature control module including a temperature sensing unit disposed in the freezing chamber, a processing unit electrically connected to the temperature sensing unit and the switch control unit, And a storage unit electrically connected to the processing unit, the storage unit storing a first temperature setting value and a second temperature setting value lower than the first temperature setting value; the processing unit receiving a A sensing signal, the sensing signal includes a measurement temperature, the measurement temperature is related to the ambient temperature of the freezing chamber, when the switch control unit allows the cold wind in the runner unit to enter the channel through the main opening When the freezing unit and the processing unit determine that the measured temperature is lower than the second temperature setting value, the processing unit controls the switch control unit so that the cold air in the runner unit cannot enter the freezing unit through the main opening. , When the switch control unit prevents the cold air in the flow channel unit from entering the microfreezing chamber through the main opening and the processing order When the unit judges that the measured temperature is higher than the first temperature setting value, the processing unit controls the switch control unit to allow the cold wind in the flow channel unit to enter the freezing chamber through the main opening.

In some embodiments, the flow channel unit includes a casing, the casing is disposed at an interval from the heat insulation box and defines a flow channel extending longitudinally and communicating with the cooling unit together with the heat insulation box; the The shell has a base wall and a partition wall. The partition wall extends from the base wall toward the heat insulation box and is connected to the heat insulation box. The flow channel is divided into a communication chamber with respect to the freezing chamber. A main opening with a longitudinally extending main passage and a sub-flow passage that communicates with the sub-opening and is isolated from the main passage; the switch control unit includes a main switch disposed at an entrance of the main passage, and a main switch for controlling the main passage A controller for opening and closing the switch, when the controller controls the main switch to be turned on and the processing unit judges that the measured temperature is lower than the second temperature set value, the processing unit causes the controller to control the main switch to be turned off for The cold air in the flow channel unit cannot enter the freezing chamber through the main channel and the main opening. When the controller controls the main switch to be turned off and the processing unit determines that the measurement temperature is higher than the first temperature setting Value, the processing unit causes the control The main control switch is turned on to let the cold air inside the flow path unit to enter the chamber and partially frozen to the main opening through the main flow channel.

In some embodiments, the storage unit stores and stores a third temperature setting value that is higher than the first temperature setting value, and a temperature is between the first temperature setting value and the third temperature setting value. The fourth temperature setpoint; the switch control unit The unit also includes a secondary switch which is disposed at the entrance of the secondary runner and is driven by the controller to be opened and closed. When the controller controls the secondary switch to be turned on and the processing unit determines that the measurement temperature is lower than the fourth temperature When the value is set, the processing unit causes the controller to control the auxiliary switch to turn off, so that the cold air in the runner unit cannot enter the auxiliary runner and the auxiliary opening. When the controller controls the auxiliary switch to turn off and When the processing unit judges that the measured temperature is higher than the third temperature setting value, the processing unit causes the controller to control the auxiliary switch to turn on, so that the cold air in the runner unit passes the subsidiary runner and the The secondary opening enters the freezing chamber.

The effect of the present invention is that by forming the auxiliary opening in the casing, when the main opening is closed, cold air can also flow into the freezing chamber through the auxiliary opening to slow down the temperature rising rate of the freezing chamber, The process of cooling the freezer due to the increase in air volume can also increase the rate of cooling, thereby reducing energy consumption. In addition, the main opening and the auxiliary opening are formed on opposite sides of the casing, so that cold wind energy can flow into two opposite sides of the freezer compartment simultaneously, so that the ambient temperature in the freezer compartment is more consistent.

1‧‧‧ Insulated Box

11‧‧‧Storage Chamber

110‧‧‧Freezer

111‧‧‧ Fruit and Vegetable Room

112‧‧‧Freezer

113‧‧‧Microfreezer

114‧‧‧ Entrance

2‧‧‧space delimitation board group

21‧‧‧ plate member

3‧‧‧cooling unit

31‧‧‧fan

4‧‧‧ runner unit

44‧‧‧ opening

5‧‧‧ Switch control unit

51‧‧‧Main switch

511‧‧‧Main frame

512‧‧‧Main wind board

513‧‧‧Support structure

514‧‧‧Baffle structure

515‧‧‧Port

52‧‧‧ Deputy switch

521‧‧‧ Sub-frame

522‧‧‧Sub-windboard

53‧‧‧controller

41‧‧‧shell

411‧‧‧ base wall

412‧‧‧ partition

413‧‧‧ runner

414‧‧‧ Mainstream

415‧‧‧Sub-runner

42‧‧‧Main opening

43‧‧‧ Deputy opening

6‧‧‧Storage Box

61‧‧‧ bottom wall

62‧‧‧wall

7‧‧‧Temperature Control Module

71‧‧‧Temperature sensing unit

72‧‧‧ processing unit

73‧‧‧Storage unit

Other features and effects of the present invention will be clearly presented in the embodiment with reference to the drawings, wherein: FIG. 1 is a schematic front view of an embodiment of the refrigerator of the present invention, illustrating a micro-freezing chamber, Relative positions of a main opening and a pair of openings; FIG. 2 is a schematic cross-sectional view of the embodiment, illustrating the structure of a cooling unit, a flow track unit, a switch control unit, and a temperature control module of the embodiment; FIG. 3 is taken along line III-III of FIG. 2 An incomplete cross-sectional schematic diagram illustrating the structure of a space-defining board group and a storage box in this embodiment; FIG. 4 is a circuit block diagram of this embodiment, illustrating the main components of the temperature control module and their components Electrical connection relationship; FIG. 5 is another schematic cross-sectional view similar to the perspective of FIG. 2, illustrating a cold air path when a main switch and a secondary switch are turned on in this embodiment; FIG. 6 is another schematic cross-sectional view similar to the perspective of FIG. 3. 7 is another schematic cross-sectional view similar to the perspective of FIG. 5, illustrating a cold air path when the main switch is turned off, but the secondary switch is turned on in this embodiment; FIG. 8 and FIG. 9 are another cross-sections similar to the perspective of FIG. 6. FIG. 10 is another cross-sectional view similar to the view of FIG. 5, illustrating a cold air path when the main switch and the sub switch are closed in this embodiment; and FIG. 11 is another cross-sectional view similar to the view of FIG. 6. .

1 to 3, an embodiment of a refrigerator according to the present invention includes a heat-insulating box 1, a space-defining plate group 2, a cooling unit 3, a first-stage unit 4, a switch control unit 5, and a storage box. 6 and a temperature control module 7.

The heat-insulating box 1 defines a receiving chamber 11.

Referring to FIGS. 1 to 3, the space-defining plate group 2 has two plate members 21, and the plate members 21 are spaced from each other in the storage chamber 11. More specifically, the two plate members 21 are spaced up and down and horizontally. It is connected to the heat-insulating box 1 for partitioning the storage chamber 11 into a freezing chamber 110, a vegetable and fruit chamber 111 above the freezing chamber 110, and a refrigerating chamber 112 above the vegetable and fruit chamber 111. The space-defining panel group 2 further has a panel member 21, which is placed in the refrigerating compartment 112 and spaced from the aforementioned panel member 21 between the vegetable and fruit compartment 111 and the refrigerating compartment 112, and is horizontally connected to the insulation box 1 A micro-freezing chamber 113 is defined together with the plate member 21 and the storage chamber 11 below. Generally speaking, the freezer compartment 113 is closed and the ambient temperature is lower than the ambient temperature of the refrigerating compartment 112 for storing different types of food.

Referring to FIGS. 1 to 3, in this embodiment, the cooling unit 3 is disposed in the heat insulation box 1, and the cooling unit 3 includes a fan corresponding to the vegetable and fruit room 111 and disposed in the heat insulation box 1. 31, which is used to send a cooled cold air to the flow channel unit 4, and then let the cold air flow to each of the storage rooms (the vegetable and fruit room 111, the refrigerating room 112, the freezing room 113, the freezing room 110, etc.) . Since the structure of the cooling unit 3 and the cooling steps performed are the prior art, they will not be repeated one by one.

Referring to FIG. 2 and FIG. 3, the flow channel unit 4 is disposed in the heat insulation box 1 and includes a casing 41 and a main opening 42 and a pair of openings 43 formed in the casing 41. The casing 41 has a base wall 411 and a partition wall 412. The base wall 411 is connected to the base wall at intervals. The inner surface of the heat insulation box 1 and the heat insulation box 1 define a flow channel 413 extending longitudinally (as indicated by Z in FIG. 2), and one end of the flow channel 413 is connected to the fan 31. For receiving the cold wind from the fan 31, the other end of the flow channel 413 extends to the refrigerating compartment 112 to convey the cold air into the refrigerating compartment 112. In addition, the main opening 42 and the auxiliary opening 43 are formed at positions of the base wall 411 relative to the freezing chamber 113. In a preferred embodiment, the main opening 42 and the auxiliary opening 43 They are horizontally arranged and spaced apart from each other on two opposite sides above the freezing chamber 113 to allow cold wind energy to flow into the opposite sides of the freezing chamber 113 evenly. The partition wall 412 extends from the side of the base wall 411 adjacent to the flow channel 413 toward the heat insulation box 1, and is located between the main opening 42 and the auxiliary opening 43, and is generally elongated. Shape, one end extends down to the vegetable and fruit room 111, and the other end is higher than the height of the main opening 42 and bypasses the top side edge of the main opening 42 and is connected to the base wall 411 and the heat insulation box 1 According to this, the partition wall 412 divides the flow channel 413 into a main channel 414 connected to the main opening 42 and a sub channel connected to the auxiliary opening 43 and isolated from the main channel 414 with respect to the freezing chamber 113. Runner 415. Therefore, the flow channel 413 can transport the cold air into the freezing chamber 113 through the main opening 42 and the auxiliary opening 43 communicating with the freezing chamber 113.

Referring to FIGS. 2 and 3, the switch control unit 5 is disposed on the runner unit 4. More specifically, the switch control unit 5 includes a main switch 51, a sub-switch 52, and a main switch 51 and a sub-control. The switch 53 is opened and closed by the controller 53. The main switch 51 is disposed at the entrance of the main channel 414 and has a close fit to the base wall 411, The partition wall 412 is connected to the main frame 511 of the heat-insulating box 1, and a main air plate 512 pivotally connected to the main frame 511. The main air plate 512 has a support structure 513 pivotally connected to the main frame 511 and defining a through opening 515, and a baffle structure 514 that closes the through opening 515 and can be pivoted with the support structure 513. In this embodiment, the main frame 511 and the bracket structure 513 are made of plastic material to strengthen the overall structural strength of the main switch 51, but the main frame 511 and the bracket structure 513 are not limited to plastic material . The baffle structure 514 is made of foam material, and the material characteristics of the small gap are used to block cold air from flowing into the main channel 414. When the peripheral edge of the bracket structure 513 is correspondingly connected to the peripheral edge of the main frame 511, the baffle structure 514 and the partition wall 413 jointly close the main channel 414. When the peripheral edge of the bracket structure 513 is not connected to the peripheral edge of the main frame 511, the baffle structure 514 does not block the main channel 414, so that the cold air flows into the freezing chamber 113 through the main opening 42. The auxiliary switch 52 is disposed at the entrance of the auxiliary flow path 415 and is horizontally disposed with the main switch 51. The auxiliary switch 52 has a sub-frame 521 closely attached to the base wall 411, the partition wall 412 and the heat insulation box 1. And an auxiliary wind board 522 pivotally connected to the auxiliary frame 521. The structure of the auxiliary switch 52 is substantially the same as that of the main switch 51, and will not be described one by one. Through the opening and closing of the auxiliary air plate 522, it is controlled whether the cold air in the flow channel unit 4 enters the micro-freezing through the auxiliary opening 43. The chamber 113 also controls whether the cold air in the runner unit 4 enters the refrigerating compartment 112 through the opening 44 communicating with the refrigerating compartment 112.

Referring to FIG. 2 and FIG. 3, in this embodiment, the controller 53 is fixed to the partition wall 412, and between the main switch 51 and the sub switch 52, the controller 53 has Two gear assemblies (not shown) are respectively connected to the pivot of the main switch 51 and the pivot of the auxiliary switch 52, so that the controller 53 controls the flow path unit 4 when the main wind plate 512 is turned on. The cold air inside flows into the freezing chamber 113 through the main channel 414 and the main opening 42. When the controller 53 controls the main switch 51 to be turned off, the main switch 51 blocks the cold air from flowing into the main channel 414 and the main opening.孔 42。 Hole 42. In contrast, when the controller 53 controls the auxiliary air plate 522 to be turned on, the cold air in the runner unit 4 flows into the freezing chamber 113 via the subsidiary runner 415 and the subsidiary opening 43, and the controller 53 controls the When the auxiliary switch 52 is turned off, the auxiliary switch 52 blocks the cold air from flowing into the auxiliary runner 415 and the auxiliary opening 43.

Referring to FIGS. 1 and 3, the storage box 6 is placed in the freezing chamber 113 and includes a bottom wall 61 and a surrounding wall 62 extending upwardly from a peripheral edge of the bottom wall 61. The bottom wall 61 abuts against a lower plate. The height of the rear wall of the component 21, the surrounding wall 62 adjacent to the main opening 42 and the auxiliary opening 43 is lower than that of the main opening 42 and the auxiliary opening 43, so that the main opening 42 and the The cold wind output from the auxiliary opening 43 can directly flow into the storage box 6, and the front wall portion of the surrounding wall 62 substantially blocks the entrance 114 of the freezing chamber 113, that is, the cold wind in the freezing chamber 113 cannot be refrigerated. The cold wind in the chamber 112 directly performs heat exchange, thereby slowing down the ambient temperature rise of the microfreezing chamber 113. Of course, the freezer compartment 113 does not necessarily need to place the storage box 6. In another embodiment, a baffle may be added to the inlet 114 of the freezer compartment 113 to openably close the inlet 114. The microfreezing chamber 113 is sealed.

Referring to FIGS. 1 to 3, the temperature control module 7 includes two temperature sensing units 71 respectively disposed in the freezing compartment 113 and the refrigerating compartment 112, and an electrical connection to the temperature sensor. The measurement unit 71 and the processing unit 72 of the controller 53, and a storage unit 73 electrically connected to the processing unit 72. The temperature sensing units 71 are exemplified by resistance temperature sensors, but the temperature sensing units 71 are not limited to resistance temperature sensors. The storage unit 73 is exemplified as a memory. In this embodiment, the storage unit 73 stores four temperature setting values. For the convenience of subsequent description, the four temperature setting values are named a first temperature setting value, a A second temperature setting value, a third temperature setting value, and a fourth temperature setting value. In this embodiment, the first temperature setting value and the second temperature setting value are respectively related to the opening and closing of the main switch 51. More specifically, when the ambient temperature in the freezing chamber 113 is higher than the first temperature When the setting value (for example: minus 1.5 degrees), the main switch 51 is turned on to allow cold air to flow into the freezing chamber 113 through the main opening 42; when the ambient temperature in the freezing chamber 113 is lower than the second temperature setting value, (For example: minus 5 degrees), the main switch 51 is turned off, and cold air is blocked from flowing into the freezing chamber 113 through the main opening 42. The third temperature setting value and the fourth temperature setting value are respectively related to the opening and closing of the auxiliary switch 52. When the ambient temperature in the refrigerator compartment 112 is higher than the third temperature setting value (for example, 5 degrees), the The auxiliary switch 52 is turned on, so that cold air flows into the freezing compartment 113 through the auxiliary opening 43, and also allows cold air to flow into the refrigerating compartment 112 through the opening 44 corresponding to the refrigerating compartment 112; At the fourth temperature setting value (for example, 2 degrees), the auxiliary switch 52 is turned off, preventing cold air from flowing into the freezing compartment 113 through the auxiliary opening 43, and also blocking cold air through the opening 44 corresponding to the refrigerating compartment 112. Flow into the refrigerator compartment 112.

Referring to FIG. 4, in operation, the processing unit 72 receives The two sensing signals of the measuring unit 71 respectively include a first measurement temperature related to the ambient temperature of the freezing chamber (see FIG. 1) 113, and a first measuring temperature related to the refrigerating chamber 112 (see Fig. 1) The second measurement temperature of the ambient temperature. With reference to FIG. 5 and FIG. 6, when the processing unit 72 determines that the first measurement temperature (for example, minus 1.4 degrees) is higher than the first temperature setting value, the processing unit 72 causes the controller 53 to control the main wind plate. 512 is turned on, and the cold air is allowed to flow into the freezing chamber 113 through the main channel 414 and the main opening 42 as shown by the arrow direction in the figure to reduce the ambient temperature of the freezing chamber 113. Moreover, when the processing unit 72 judges that the second measurement temperature (for example, 5.1 degrees) is higher than the third temperature setting value, the processing unit 72 causes the controller 53 to control the auxiliary air plate 522 to be opened, so that the cold air passes through The sub-flow channel 415 and the sub-opening 43 flow into the freezing chamber 113 as shown by the arrows in the figure, to help increase the flow of cold air into the freezing chamber 113 to quickly cool the environment of the freezing chamber 113 temperature.

Referring to FIG. 7 and FIG. 8, as cold air flows into the freezing compartment 113 and the refrigerating compartment 112, the ambient temperatures of the freezing compartment 113 and the refrigerating compartment 112 are gradually reduced, and when the processing unit 72 judges the first quantity When the measured temperature (for example, minus 5.1 degrees) is lower than the second temperature setting value, the processing unit 72 causes the controller 53 to control the main air plate 512 to close to prevent the cold wind from passing through the main channel 414 and the main opening 42. The flow into the freezer compartment 113 is shown in the direction of the arrow in FIG. 8. Referring to FIG. 7 and FIG. 9, when the processing unit 72 determines that the second measurement temperature (for example, 3 degrees) is between the third temperature setting value and the fourth temperature setting value, the processing unit 72 causes the control The device 53 controls the auxiliary wind plate 522 to open, so that the cold wind As shown in the direction of the arrow in FIG. 9, the sub-flow channel 415 and the sub-opening hole 43 flow into the freezer compartment 113, whereby the ambient temperature through the refrigerating compartment 112 does not drop to a temperature set value that allows the sub-air plate 522 to close. During the process, cold air is continuously sent to the freezing chamber 113 to slow down the heating rate of the ambient temperature in the freezing chamber 113, thereby saving power consumption.

Referring to FIG. 10 and FIG. 11, as the amount of air flowing into the freezing compartment 113 decreases and is not completely insulated from the refrigerating compartment 112, the freezing compartment 113 will still slowly warm up. When the processing unit 72 determines that the first When the measured temperature (for example, minus 4.5 degrees) is between the first temperature setting value and the second temperature setting value, the processing unit 72 still causes the controller 53 to control the main air plate 512 to close to block the cold wind It flows into the freezing chamber 113 through the main channel 414 and the main opening 42. However, the refrigerating compartment 112 is continuously infused due to cold wind having a temperature lower than the fourth temperature set value, and the temperature is further continuously reduced. When the processing unit 72 determines that the second measurement temperature (for example, 1.9 degrees) is lower than the fourth temperature When the value is set, the processing unit 72 causes the controller 53 to control the auxiliary air plate 522 to close, preventing the cold air from flowing into the freezing chamber 113 through the auxiliary flow channel 415 and the auxiliary opening 43 as shown by the arrow in the figure. Moreover, it prevents the cold air from flowing into the refrigerating compartment 112 through the opening 44 corresponding to the refrigerating compartment 112, and can temporarily stop the cooling unit 3 when the refrigerating compartment 112 and the freezing compartment 113 are within a preset temperature interval. Operation, which can achieve the effect of energy saving and environmental protection.

In summary, the refrigerator of the present invention forms the auxiliary opening 43 in the casing 41 so that when the main opening 42 is closed, cold air can flow into the freezing chamber 113 through the auxiliary opening 43 to slow down the The rate at which the freezing chamber 113 heats up, and The increase in airflow can also increase the rate of cooling, thereby reducing energy consumption. In addition, the main opening hole 42 and the auxiliary opening hole 43 are formed on opposite sides of the housing 41 to allow cold wind energy to flow into two opposite sides of the freezing chamber 113 simultaneously, so that the ambient temperature in the freezing chamber 113 is relatively consistent. , So it can indeed achieve the purpose of cost invention.

However, the above are only examples of the present invention. When the scope of implementation of the present invention cannot be limited in this way, any simple equivalent changes and modifications made in accordance with the scope of the patent application and the content of the patent specification of the present invention are still Within the scope of the invention patent.

Claims (4)

A refrigerator includes: a heat-insulating box defining a storage chamber; a space-defining plate group having two plate members, the plate members being spaced apart from each other in the storage chamber and connected to the storage chamber; A micro-freezing chamber is defined together; a cooling unit is disposed in the heat-insulating box and generates a cold wind; a first-rate road unit is disposed in the heat-insulating box and is connected to the cooling unit and the storage chamber for transportation The cold air enters the storage chamber, and the flow channel unit also has a main opening and a pair of openings, and communicates with the micro-freezing chamber through the main opening and the auxiliary openings to transport the cold air into the micro-chamber. In the freezing chamber, the main opening and the auxiliary opening are arranged horizontally and spaced apart from each other on two opposite sides above the microfreezing chamber; a switch control unit is provided in the flow channel unit and controls the inside of the flow channel unit Whether the cold wind enters the freezing chamber through the main opening and / or the auxiliary opening; and a storage box, which is placed in the freezing chamber and includes a bottom wall and a bottom wall extending upwardly from the bottom wall Surrounding wall, the bottom wall abuts against one of the plate members relatively below The height of the surrounding wall adjacent to the main opening and the auxiliary opening is lower than that of the main opening and the auxiliary opening, so that the cold wind output from the main opening and the auxiliary opening can directly flow into the storage box. . The refrigerator according to claim 1, further comprising a temperature control module including a temperature sensing unit disposed in the freezing chamber, a processing unit electrically connected to the temperature sensing unit and the switch control unit, And a storage unit electrically connected to the processing unit, the storage unit storing a first temperature setting value and a second temperature setting value lower than the first temperature setting value; the processing unit receiving a A sensing signal, the sensing signal includes a measurement temperature, the measurement temperature is related to the ambient temperature of the freezing chamber, when the switch control unit allows the cold wind in the runner unit to enter the channel through the main opening When the freezing unit and the processing unit determine that the measured temperature is lower than the second temperature setting value, the processing unit controls the switch control unit so that the cold air in the runner unit cannot enter the freezing unit through the main opening. When the switch control unit prevents the cold air in the runner unit from entering the freezing chamber through the main opening and the processing unit determines that the measured temperature is higher than the first temperature setting value, the processing unit The switch control unit is controlled to allow the cold air in the flow channel unit to enter the freezing chamber through the main opening. The refrigerator according to claim 2, wherein the flow channel unit includes a shell, the shell is disposed at an interval from the heat insulation box and defines a longitudinal extension and communicates with the cooling unit together with the heat insulation box. The flow path; the shell has a base wall and a partition wall, the partition wall extends from the base wall toward the thermal insulation box and is connected to the thermal insulation box, and the flow path is relative to the freezing chamber It is divided into a main channel which communicates with the main opening and extends longitudinally, and a sub-flow channel which communicates with the auxiliary opening and is isolated from the main channel; the switch control unit includes a main switch provided at the entrance of the main channel, And a controller controlling the opening and closing of the main switch, when the controller controls the main switch to be turned on and the processing unit judges that the measured temperature is lower than the second temperature setting value, the processing unit causes the controller to control the main switch The switch is closed to prevent the cold air in the flow channel unit from entering the freezing chamber through the main channel and the main opening. When the controller controls the main switch to be turned off and the processing unit determines that the measurement temperature is higher than When the first temperature setting value, the process The unit causes the controller to control the main switch to turn on, so that the cold wind in the flow channel unit can enter the freezing chamber through the main channel and the main opening. The refrigerator according to claim 3, wherein the storage unit stores and stores a third temperature setting value higher than the first temperature setting value, and a temperature between the first temperature setting value and the third temperature setting value. A fourth temperature setting value between temperature setting values; the switch control unit further includes a sub-switch set at the entrance of the sub-flow channel and driven by the controller to open and close, when the controller controls the sub-switch to turn on When the processing unit judges that the measured temperature is lower than the fourth temperature setting value, the processing unit causes the controller to control the auxiliary switch to be turned off, so that the cold air in the runner unit cannot enter the subsidiary runner and The auxiliary opening, when the controller controls the auxiliary switch to be turned off and the processing unit judges that the measured temperature is higher than the third temperature set value, the processing unit causes the controller to control the auxiliary switch to be turned on, so that the The cold wind in the flow channel unit enters the freezing chamber through the secondary flow channel and the secondary opening.