JP3857964B2 - Cold air passage control device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cold air passage control device that controls the amount of cold air passing through a cold air passage by operating an operation lever.
[0002]
[Prior art]
A typical example is a refrigerator provided with a cold air passage control device that controls the amount of cold air passing through the cold air passage. This type of refrigerator circulates cold air cooled by a cooler through a cold air passage communicating with an article storage chamber by a blower. In order to adjust the temperature of the article storage chamber, a cold air passage control device that opens and closes the cold air passage is provided.
[0003]
Such a cold air passage of the refrigerator is arranged in the vertical direction on the back side or the side surface side of the article storage room, and is configured to distribute the cold air to the article storage room. In general, there is little change in the temperature of the article storage room on a daily basis. However, there are many cases where the ambient temperature of the refrigerator differs greatly between summer and winter, and the cooling of the refrigerator is slightly worse in summer due to the influence of the ambient temperature than in winter. By increasing the amount of cool air supplied to the article storage room, the article storage room can be brought to a good cooling temperature.
[0004]
In addition, recently, there is a study to extend the freshness maintenance period of stored vegetables and the like by lowering the temperature of the vegetable room provided in the refrigerator. In that case, the temperature of the vegetable room is set to about 3 ° C., which is lower than the conventional average of 5 ° C., so that the storage period of stored vegetables and the like is increased. However, lowering the temperature of the vegetable room is not preferable to continuously maintain the vegetable room at a lower temperature because the operation time of the refrigeration apparatus including the refrigerant compressor becomes longer and power consumption increases. .
[0005]
[Problems to be solved by the invention]
In consideration of such points, the present invention is a cold air passage control device that controls the amount of cold air that passes through the cold air passage by operation of the operation lever, is easy to operate and achieves stable operation, and is applied to a refrigerator. It provides something superior to Further, the cold air passage control is performed so that the temperature of the vegetable room can be maintained at a high temperature state as in the conventional temperature state, for example, an average temperature state of 5 ° C., and a lower temperature state, for example, an average temperature state of 3 ° C. A cold air passage control device suitable for achieving a refrigerator including the device is provided. This provides a cold air passage control device for a refrigerator that enables the temperature to be changed according to the usage state of the vegetable room and enables storage at a temperature according to the usage situation and economical operation of the refrigerator. It is.
[0008]
[Means for Solving the Problems]
In order to solve the above problems, the present invention controls the amount of cold air passing through a cold air passage communicating with an article storage chamber by operating an operation lever, and the operation lever is moved laterally from the article storage chamber. A control plate that is slidably provided in the cold air passage member and is supported by the cold air passage member so as to be rotatable by a left-right axis so as to open / close the cold air passage or increase / decrease the amount of cold air passing through the cold air passage; An operation groove is provided on one side with an oblique groove into which an operation rod protruding rearward of the operation lever is fitted, and the other side is pivotally coupled to the control plate. The operation plate is slid in the left-right direction of the operation lever. Is a cold air passage control device, wherein the control plate rotates in the cold air passage.
[0009]
When the operation lever is provided in the vegetable compartment, a space for easy operation is required, and the effective storage volume of the vegetable compartment is reduced. In addition, when the vegetable container is a drawer type together with the vegetable compartment door, there is a problem that it becomes difficult to provide the operation lever in the vegetable compartment. In this invention, it becomes easy to set it as the structure which arrange | positions a refrigerator compartment on a vegetable compartment, and operates an operation lever from a refrigerator compartment, This problem is also solved. Also, it can be installed at the lower part of the left or right side of the refrigerating room so that it does not interfere with the goods stored in the refrigerating room. In comparison, the position of the operating lever is less likely to change due to contact with the article to be stored, and switching is stable.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described. 1 shows an embodiment of the present invention, FIG. 1 is a longitudinal sectional view of a main part of a refrigerator provided with a cold air passage control device of the present invention, FIG. 2 is a sectional view of a YY portion of FIG. 1, and FIG. 4 is an exploded perspective view of the cold air passage control device of the present invention, FIG. 4 is a perspective view of an operation plate mounting portion of the cold air passage control device of the present invention, FIG. 5 is a perspective view of an operation board mounting portion of the cold air passage control device of the present invention, and FIG. 7 is an exploded perspective view of a duct component part of a refrigerator to which the cold air passage control device of the present invention is applied, FIG. 7 is a longitudinal sectional view of a refrigerator to which the cold air passage control device of the present invention is applied, and FIG. 8 is a refrigerator to which the cold air passage control device of the present invention is applied. It is a front view of a main body.
[0011]
A cooling storage to which the cold air passage control device of the present invention is applied will be described with reference to the drawings. Here, 1 is a refrigerator which is a typical cooling storage to which the cold air passage control device of the present invention is applied, and forms a plurality of storage chambers by partitioning the inside of the main body 2 with a full opening, and the front surfaces of these storage chambers are It can be opened and closed with a door. The refrigerator body 2 has a heat insulating structure in which a foam heat insulating material 2C is filled between an outer box (outer wall plate) 2A and an inner box (inner wall plate) 2B. In the refrigerator main body 2, a refrigerator compartment 3, a vegetable compartment 4, an upper freezer compartment 5, an ice making compartment 7, and a lower freezer compartment 6 are partitioned from the top, and the refrigerator compartment 3 is provided at the bottom of the refrigerator compartment 3. 3 and a specific low temperature chamber 9 partitioned by a partition plate (partition wall) 8 is provided. The upper freezer compartment 5 can also be referred to as a switching compartment because it can be manually operated by a cold air amount adjusting device to be a refrigerator compartment.
[0012]
The front opening of the refrigerating room 3 is closed by a revolving refrigerating room door 10 that is opened and closed by being pivoted laterally by a hinge device on one side of the refrigerator body 2. The front opening of the vegetable compartment 4 is closed by a drawer-type door 11 that is drawn forward together with a vegetable container 15 supported so as to be drawn in the front-rear direction by left and right rails or roller devices 21 provided in the vegetable compartment 4. The upper freezer compartment 5 and the lower freezer compartment 6 are each drawn out forward together with the containers 16 and 17 supported so as to be able to be drawn out in the front-rear direction with respect to the left and right rails provided in the freezer compartment. The doors 12 and 13 are closed.
[0013]
In the ice making chamber 7, an automatic ice making machine 18 is provided at the top, and an ice storage container 19 is disposed at the bottom. The ice storage container 19 is supported so that it can be pulled out in the front-rear direction with respect to the left and right rails provided on the left and right walls in the ice making chamber 7, and is drawn forward together with a pull-out door that opens and closes the front opening of the ice making chamber 7. It is a mechanism. 20 is a water supply container for storing ice making water to be supplied to the automatic ice making machine 18. The water supply container 20 is disposed in a small chamber formed beside the specific low temperature chamber 9 in the refrigerating chamber 3. It can be taken out freely. The ice making water is sucked up by a pump from the water supply container 20 and supplied to the ice making tray 22 of the automatic ice making machine 18 through the water supply pipe.
[0014]
Reference numeral 24 is a refrigerant compressor for the refrigeration system, and 25 is a refrigerant condenser for the refrigeration system. Reference numeral 26 denotes an evaporating dish for evaporating defrosted water, which will be described later, by the heat of the condenser 25. The evaporating dish 26 is placed on the condenser 25 and can be pulled out from the lower front of the refrigerator body 2. The compressor 24, the condenser 25, and the evaporating dish 26 are installed in a machine room 28 provided at the lower part of the refrigerator body 2. Reference numerals 29 and 30 denote refrigerant evaporators (coolers) of the refrigeration system. 31 is a first blower that circulates the cold air cooled by the first evaporator (cooler) 29 to the upper freezer compartment 5, the lower freezer compartment 6, and the ice making compartment 7, and 32 is cooled by the second evaporator (cooler) 30. The second blower circulates cold air to the refrigerator compartment 3, the vegetable compartment 4, and the specific low temperature compartment 9. Reference numeral 33 denotes a defrosting glass tube heater of the first evaporator (cooler) 29, and reference numeral 34 denotes a defrosting glass tube heater of the second evaporator (cooler) 30. The defrost water from the first evaporator (cooler) 29 and the second evaporator (cooler) 30 is led to the evaporating dish 26 through the drain pipe and is evaporated there. Reference numeral 35 denotes a cold air duct through which the cold air cooled by the second evaporator (cooler) 30 is guided from the second blower 32, and is widely arranged on the upper wall of the refrigerator compartment 3, and its front end is a front opening of the refrigerator compartment 3. It communicates with the cold air outlet 36 formed on the upper surface. The cold air blown out from the cold air outlet 36 forms a cold air curtain 37 that flows from the top to the bottom as indicated by the arrow in the front opening of the refrigerator compartment 3. The cold air cooled by the first evaporator (cooler) 29 and the cold air cooled by the second evaporator (cooler) 30 are circulated as indicated by arrows by the first blower 31 and the second blower 32, respectively, and each chamber is circulated. Cool to a predetermined temperature.
[0015]
In such a configuration, the temperature of each chamber is maintained at about 3-4 ° C. in the refrigerator compartment 3 and about 4-6 ° C. in the vegetable compartment 4, and the upper freezer compartment 5, the lower freezer compartment 6, and the ice making compartment 7 are further maintained. It is about -18 degreeC--20 degreeC. Moreover, it is 5-8 degreeC on the storage shelf 38 provided inside the refrigerator compartment door 10. FIG. The specific low-temperature chamber 9 is a chilled chamber of about 1 ° C. higher than 0 ° C., an ice greenhouse of about 0 to 1 ° C. lower than 0 ° C. and higher than the freezing temperature of food, It may be a partial freezing chamber at about −4 ° C. so that a thin ice layer is formed on the surface. As described above, the specific low temperature chamber 9 is used for refrigerated storage of food in a specific temperature range, and requires stricter temperature control than other rooms.
[0016]
With respect to the formation of a cold air circulation path in which the cold air cooled by the second evaporator (cooler) 30 is circulated to the refrigerator compartment 3 and the vegetable compartment 4 by the second blower 32, a duct shown in FIG. A configuration is provided. In this, 40 is a back plate of the refrigerator compartment 3, 41 is a first duct member which is a cold air passage member, and 42 is a second duct member which is a cold air passage member. The second duct member 42 is formed of foamed polystyrene, and is fitted and held between a pair of left and right ribs 79 formed on the back side of the back plate 40. For this reason, by the combination of the back plate 40 and the first duct member 41, the cold air passage 43 </ b> A disposed on the left and right sides of the back plate 40 of the refrigerator compartment 3 between the first duct member 41 and the second duct member 42. , 43B are formed. The back plate 40, the first duct member 41, and the second duct member 42 constitute a cold air passage member that forms the cold air passages 43A and 43B by a combination. Reference numeral 44 denotes a duct member serving as a cold air passage member which is disposed on the upper surface of the ceiling plate 45 of the refrigerator compartment 3 and forms the cold air duct 35 together with the ceiling plate 45.
[0017]
The cold air cooled by the second evaporator (cooler) 30 is circulated between the refrigerator compartment 3 and the vegetable compartment 4 by the second blower 32. In the path, a part of the cold air that has passed through the second blower 32 is blown out from the cold air outlet 36 through the cold air duct 35 from the front supply port 46. The other part of the cool air that has passed through the second blower 32 passes through the left and right cool air passages 43A and 43B on the back side of the back plate 40 of the refrigerating chamber 3 and is formed in the back plate 40 of the refrigerating chamber 3 39 is blown out to the refrigerating chamber 3, and a part is blown out from the cold air outlet 39A to the specific low temperature chamber 9 while flowing further down the cold air passages 43A and 43B.
[0018]
The cold air that has flowed further downward in the left and right cold air passages 43 </ b> A and 43 </ b> B is supplied from the cold air outlet 50 to the cold air passage 51 formed between the refrigerator compartment 3 and the vegetable compartment 4. The cold air passage 51 is formed between the partition plate 52 between the refrigerator compartment 3 and the vegetable compartment 4 and the ceiling plate 53 of the vegetable compartment 4. The partition plate 52 constitutes the bottom wall of the refrigerator compartment 3, and the ceiling plate 53 of the vegetable compartment 4 is disposed at a position that substantially closes the top opening of the vegetable container 15, and can be removed forward of the vegetable compartment 4. The left and right walls of the vegetable compartment 4 are supported.
[0019]
The cold air supplied to the cold air passage 51 flows forward through the cold air passage 51, flows down from the front end outlet 54 to the vegetable compartment 4, and surrounds the vegetable container 15 from the space formed between the vegetable container 15 and the door 11. The air is sucked from the cold air suction port 55 formed on the back surface of the vegetable compartment 4 through the space formed in the above. A part of the cool air in the refrigerator compartment 3 flows into the cool air passage 51 from the suction port 56 formed in the partition plate 52.
[0020]
A cold air return passage 57 is formed between the back plate 40 and the main body 2 between the left and right cold air passages 43 </ b> A and 43 </ b> B on the back side of the refrigerator compartment 3. The cold air that has cooled the refrigerator compartment 3 and the specific low temperature chamber 9 flows from the cold air suction port formed in the lower part of the back plate 40 or the cold air suction port formed in the rear part of the partition plate 52 to the cold air return passage 57 to be second evaporated. It flows into the lower side of the vessel (cooler) 30 and is cooled again by the second evaporator (cooler) 30.
[0021]
The cold air in the vegetable compartment 4 is sucked from the cold air suction port 55 and flows into the cold air return passage 57, flows into the lower side of the second evaporator (cooler) 30, and is again fed by the second evaporator (cooler) 30. To be cooled.
[0022]
The present invention provides a cold air passage control device 60 that controls the amount of cold air passing through the cold air passage communicating with the article storage chamber of the refrigerator 1 by operating an operation lever. As a typical example of application of the cold air passage control device 60 of the present invention, the refrigerator compartment 3 and the vegetable compartment 4 will be described as typical examples of the article storage room.
[0023]
The cool air passage control device 60 includes an operation lever 62 projecting from the surface of the operation board 62A, and a control plate 63 that opens and closes the cool air passage or increases / decreases the amount of supplied cool air through the cool air passage by the operation lever 62. . The operation of the operation lever 62 is transmitted to the control plate 63 via the operation plate 65. The structure is such that the operating rod 64 extending rearward of the operating lever 62 is loosely fitted in an oblique groove 66 formed on one end side of the operating plate 65, and the operating plate 65 moves up and down by moving the operating lever 62 left and right. As a result, the control plate 63 rotates in the vertical direction about the horizontal axis 67. By turning the control plate 63, the cold air passage is opened or closed, or the cross-sectional area of the cold air passage is varied to increase or decrease the amount of supplied cold air.
[0024]
Hereinafter, a specific configuration in which the cold air passage control device 60 is applied to the refrigerator 1 will be described. The cold air passage control device 60 has a structure that can be easily assembled into the refrigerator 1 as a unit by being attached to a portion constituting a part of the cold air passage member. For this reason, a part 40A of the back plate 40, a part 41A of the first duct member 41, and a part 42A of the second duct member 42 are combined to form a cold air passage member, and the back plate 40 and the first duct member 41 are combined. The second duct member 42 communicates with the lower part of the cool air passage 43B configured to constitute a series of cool air passages 43B. The combination of the back plate 40, the first duct member 41 and the second duct member 42 and the combination of the part 40A of the back plate 40, the part 41A of the first duct member 41 and the part 42A of the second duct member 42 , Arranged along the inner back surface of the main body 2.
[0025]
The operation lever 62 faces the inner surface of the back of the refrigerator compartment 3, that is, the opening 61 formed in the rear plate 40A of the refrigerator compartment 3, and is provided on the back side of the rear plate 40A so as to be slidable in the left-right direction from the refrigerator compartment 3. Has been placed. Specifically, the operation board 62A is arranged on the back side of the back plate 40A, and a part of the operation board 62A is slidably fitted to the upper and lower rail portions 70 formed in the left and right directions on the back plate 40A. The plurality of claw portions 71 formed on the back plate 40A are slidably fitted and supported. Thus, the operation substrate 62A is supported so as to be slidable in parallel with the back side of the back plate 40A. An opening 72 is formed in the operation board 62A corresponding to the cold air outlet 39A.
[0026]
The operation plate 65 is supported in a substantially vertical state so as to be movable up and down at a position close to the second duct member 42A by a pair of upper and lower support portions 73 and claw portions 74 extending from the first duct member 41A to the cool air passage 43B. Yes. A groove 66 is formed in the upper end portion, which is one end portion of the operation plate 65, and is inclined obliquely upward with an angle θ with respect to the vertical axis of the operation plate 65 being larger than 90 °. The lower end portion which is the other end portion of the operation plate 65 is formed with a shaft hole 76 in which a shaft 75 extending in the lateral direction from the control plate 63 is loosely fitted so as to form a pivotable shaft connection with the control plate 63. Yes.
[0027]
The control plate 63 is formed with left and right shafts 67 at both left and right ends, and the left and right shafts 67 are rotatably supported by a pair of left and right bearings 77 extending from the first duct member 41A to the cool air passage 43B. . Ribs 79 are formed on the back plate 40A so as to be continuous with the ribs 79 on the back plate 40, and the locking claws 78 formed on the left and right flanges of the first duct member 41A are ribs 79 of the back plate 40 as shown in FIG. The first duct member 41A and the back plate 40A are combined with each other, and a cold air passage 43B is formed between the first duct member 41A and the second duct member 42A.
[0028]
The opening 61 facing the operation lever 62 is provided at the lower part on either the left or right side in the back of the refrigerating room 3, so that it does not interfere with the articles stored in the refrigerating room 3. In the embodiment, the back plate 40 </ b> A is provided in the vicinity of the upper surface of the partition plate (partition wall) 8 on the right side of the refrigerator compartment 3. Further, a flange 69 projecting toward the refrigerator compartment 3 is formed around the opening 61, and the operation lever 62 projects toward the refrigerator compartment 3 to a position slightly recessed so as not to protrude from the flange 69. It is arranged. As a result, the articles stored in the refrigerator compartment 3 can be prevented from hitting the operation lever 62 as much as possible.
[0029]
In such a configuration, the operation plate 65 moves up and down by the left and right slide operation of the operation lever 62, and accordingly, the control plate 63 rotates in the up and down direction around the shaft 67. For this reason, the cool air variable amount supply passage 43B is opened and closed by the rotation of the control plate 63. Alternatively, the cross-sectional area of the cool air variable amount supply passage 43B can be varied, and the amount of supplied cool air passing therethrough can be increased or decreased. Since the operation lever 62, the operation board 62A, the control plate 63, and the operation plate 65 can be reduced in weight by being made of a synthetic resin, the control plate 63 and the operation plate 65 are moved to the left end or the right end of the operation lever 62. It is possible to stably stop at the following position. The lateral movement width of the operation lever 62 is limited by a method in which the claw portion 71 of the back plate 40A is in contact with the left and right edges of the opening 78 of the operation board 62A, or the lateral movement width of the operation lever 62 is limited to the rail portion 70. This is achieved by a method of forming a stopper portion or other methods.
[0030]
In the system in which the control plate 63 opens and closes the cold air variable amount supply passage 43B, when the control plate 63 closes the cold air variable amount supply passage 43B by the operation of the operation lever 62, the cold air supply to the vegetable compartment 4 is the cold air variable amount supply. If the leaked cold air from the passage 43B is ignored, the supply is made only from the cold air constant supply passage 43A, and the temperature of the vegetable compartment 4 is in a normal storage temperature state of about 5 ° C. on average as in the conventional temperature state. On the other hand, in the state where the control plate 63 opens the cold air variable amount supply passage 43B, the cold air supply to the vegetable compartment 4 is not only the cold air supplied from the cold air fixed amount supply passage 43A but also the cold air supply from the cold variable amount supply passage 43B. Since it is performed, the temperature of the vegetable compartment 4 becomes a relatively low temperature state of about 3 ° C., which is a lower average.
[0031]
In the method in which the control plate 63 increases or decreases the amount of supplied cold air passing through the cold air variable amount supply passage 43B, when the control plate 63 decreases the amount of supplied cold air passing through the cold air variable amount supply passage 43B by the operation of the operation lever 62, the vegetable compartment 4 The cold air supply to the chilled air is mainly supplied from the cold air fixed amount supply passage 43A as the amount of cold air from the cold air variable amount supply passage 43B decreases, and the temperature of the vegetable compartment 4 is about 5 ° C. on average as in the conventional temperature state. A normal storage temperature state is obtained. On the other hand, when the control plate 63 increases the supply cold air amount passing through the cold air variable amount supply passage 43B, the cold air supply to the vegetable compartment 4 is supplied from the cold air variable amount supply passage 43B in addition to the supply cold air from the cold air fixed amount supply passage 43A. Increased cold air supply is performed, and the temperature of the vegetable room 4 becomes a relatively low temperature state of about 3 ° C. which is a lower average.
[0032]
The temperature of the vegetable room 4 can be switched to a plurality of stages in addition to the above two types of switching. However, in actual use, the temperature of the vegetable room 4 can be switched between many temperature ranges. Since there is no need to do this, the above two types of switching are sufficient. The structure of the cool air passage control device 60 is not limited to the above-described structure, and may be any structure that can achieve the same effect as described above with various structures without departing from the spirit of the present invention.
[0033]
Thus, the articles stored in the refrigerator compartment 3 are not disturbed, and the operation from the refrigerator compartment 3 is easy. And when the vegetable container 15 is made into a drawer type with the vegetable compartment door 11, it becomes difficult to provide the operation lever 62 in the vegetable compartment 4, but the problem is also solved. Moreover, there is no reduction in the effective storage volume of the vegetable compartment 4 which occurs when the operation lever 62 is provided in the vegetable compartment 4, and a large-capacity vegetable container 15 can be provided.
[0034]
By the cold air passage control device 60 of the present invention, the temperature of the vegetable compartment 4 is switched between a relatively high temperature state of about 5 ° C. as in the conventional temperature state and a relatively low temperature state of about 3 ° C. on the lower average. it can. For this reason, one cold air passage 43A of the cold air passages 43A and 43B constitutes a cold air constant supply passage, and the cold air passage 43B constitutes a cold air variable amount supply passage, whereby the vegetable compartment 4 can be switched to two temperatures. Therefore, it is possible to economically operate the refrigerator without continuously cooling the vegetable room to a low temperature state for a longer time than necessary.
[0035]
Further, the present invention is not limited to the refrigerator of the above embodiment, but can be applied to various forms of refrigerators, and various modifications can be considered without departing from the technical scope of the present invention, and includes various embodiments related thereto. To do.
[0037]
【The invention's effect】
According to the present invention, it is easy to operate the operation lever from the refrigerator compartment , and it can be provided at the lower part on either the left or right side of the refrigerator compartment so as not to obstruct the articles stored in the refrigerator compartment. . In addition, since the operation lever is a slide in the left-right direction, the position of the operation lever is less likely to change by contacting the article to be stored compared to the slide in the up-down direction, and switching is stable. In addition, the cold air passage control device is attached to a portion constituting a part of the cold air passage member, so that it can be easily assembled into a refrigerator as a unit.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of an essential part of a refrigerator provided with a cold air passage control device of the present invention.
FIG. 2 is a cross-sectional view taken along a line YY in FIG.
FIG. 3 is an exploded perspective view of the cold air passage control device of the present invention.
FIG. 4 is a perspective view of an operation plate mounting portion of the cold air passage control device of the present invention.
FIG. 5 is a perspective view of an operation board mounting portion of the cold air passage control device of the present invention.
FIG. 6 is an exploded perspective view of a duct component part of a refrigerator to which the cold air passage control device of the present invention is applied.
FIG. 7 is a longitudinal sectional view of a refrigerator to which the cold air passage control device of the present invention is applied.
FIG. 8 is a front view of a refrigerator main body to which the cold air passage control device of the present invention is applied.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Refrigerator 2 ... Refrigerator main body 3 ... Refrigeration room 4 ... Vegetable room 30 ... Cooler 32 ... Blower 40A ... Back plate (cold air passage member)
41A ··· First duct member (cold air passage member)
42A ... Second duct member (cold air passage member)
43A ······································································································································································································· ..Control plate 64 ..Operating bar 65 ..Operating plate

Claims (1)

  The amount of cool air passing through the cool air passage communicating with the article storage chamber is controlled by operation of an operation lever, and the operation lever is provided in the cold air passage member so as to be slidable in the left-right direction from the article storage chamber, A control plate supported by the cold air passage member so as to be pivotable by a left-right axis so as to open / close the cold air passage or increase / decrease the amount of cold air passing through the cold air passage, and an operating rod protruding rearward of the operation lever are fitted. A diagonal groove is provided on one side and the other side is provided with an operating plate pivotally coupled to the control plate. A cool air passage control device characterized by rotating inside.

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