JP2005331148A - Cold air control damper for indirect cooling type refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve a degree of freedom in designing a cold air control damper for an indirect cooling type refrigerator. <P>SOLUTION: This cold air control damper for the indirect cooling type refrigerator for controlling a flow rate of cold air supplied to a refrigeration chamber 91, comprises a first driving bevel gear 21 and a second driving bevel gear 22 rotatably driven by a motor (rotating driving means) 11, a first driven bevel gear 31 rotatably driven by the first driving bevel gear 21, a second driven bevel gear 32 rotatably driven by the second driving bevel gear 22, a first valve plate 41 rotatably driven by the first driven bevel gear 31, and a second valve plate 42 rotatably driven by the second driven bevel gear 32. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a cold air adjusting damper of a cold refrigerator for adjusting the flow rate of cold air to a refrigerator compartment.

  As this kind of cool air adjusting damper for a cold refrigerator, the rotational driving force supplied from a motor (rotational drive means) is transmitted to the first valve plate and the second valve plate via a plurality of spur gears. By this, what was comprised so that each of the 1st opening part and 2nd opening part which were provided in the casing may be opened and closed.

  In the cool air adjusting damper of the intercooled refrigerator configured as described above, the rotation of the output shaft of the motor is transmitted to the first valve plate and the second valve plate via a plurality of spur gears, and these first valves The plate and the second valve plate rotate to bring the first opening and the second opening into the fully closed state or the fully opened state, respectively, so that they flow into the refrigerator compartment through the first opening and the second opening. The flow rate of cool air can be adjusted.

  However, in the cold air adjusting damper of the conventional intercooled refrigerator configured as described above, the rotational driving force of the motor is transmitted to the first valve plate and the second valve plate via the spur gear. The output shaft of the motor, the rotation shaft of each gear, and the rotation shafts of the first valve plate and the second valve plate had to be arranged in parallel. For this reason, it was difficult to freely design the first valve plate and the second valve plate so as to fit the inner wall surfaces of various shapes in the refrigerator compartment. That is, there is a problem that the degree of freedom in design is low.

  This invention is made | formed in view of the said situation, and makes it a subject to provide the damper for cold air adjustment of a cold refrigerator which can aim at the improvement of the freedom degree of design.

  In order to solve the above problems, the invention described in claim 1 is a cold air adjusting damper of a cold refrigerator for adjusting the flow rate of the cold air supplied to the refrigerating room, and is rotationally driven by the rotation driving means. A first driven bevel gear, a second driven bevel gear, a first driven bevel gear rotated by the first drive bevel gear, a second driven bevel gear rotated by the second drive bevel gear, and A first valve plate that is rotationally driven by a first driven bevel gear and a second valve plate that is rotationally driven by the second driven bevel gear are provided.

  According to a second aspect of the present invention, in the first aspect of the present invention, the first drive bevel gear is first driven within a range in which the first driven bevel gear can be rotationally driven only by a first rotation angle. The first driven bevel gear having a first large-diameter conical surface having an outer diameter along a tip surface of the first drive tooth in a range having the teeth and not having the first drive teeth. Has a first driven tooth that meshes with the first drive tooth and is rotationally driven only by the first rotation angle, and has teeth of the first driven tooth in a range not having the first driven tooth. The second drive bevel gear has a second drive tooth within a range in which the second driven bevel gear can be rotationally driven only by a second rotation angle. And a second large-diameter conical surface having an outer diameter along the tip surface of the second drive tooth in a range not having the second drive tooth. The second driven bevel gear has a second driven tooth that meshes with the second drive tooth and is driven to rotate only by the second rotation angle, and does not have the second driven tooth. And having a second small-diameter conical surface having an outer diameter along the bottom surface of the second driven tooth.

  According to a third aspect of the present invention, in the first or second aspect of the invention, the first drive bevel gear and the second drive bevel gear are provided coaxially.

  The invention according to claim 4 is the invention according to claim 3, wherein the first driven bevel gear and the second driven bevel gear are respectively the rotation centers of the first drive bevel gear and the second drive bevel gear. The first valve plate and the second valve plate are provided at positions separated by a predetermined angle around a line, and the rotation center lines of the first and second driven bevel gears are the rotation centers of the first driven bevel gear and the second driven bevel gear. The first drive bevel gear and the second drive bevel gear are disposed so as to extend in a direction away from the rotation center line of the first drive bevel gear and the second drive bevel gear.

  The invention according to claim 5 is the invention according to any one of claims 2 to 4, wherein the first rotation angle and the second rotation angle are such that the first valve plate and the second valve plate are in a casing. Each of the first opening and the second opening is set to an angle at which the first opening and the second opening can be rotated from the fully closed state to the fully open state or from the fully open state to the fully closed state.

  The invention according to claim 6 is the invention according to any one of claims 2 to 5, wherein the first drive bevel gear and the second drive bevel gear are the first drive tooth and the first driven tooth. The timing of meshing and the timing of meshing of the second drive tooth and the second driven tooth are provided so as to be changeable.

  According to the first aspect of the present invention configured as described above, the first driven bevel gear and the second driven bevel gear are driven by rotating the first driving bevel gear and the second driving bevel gear by the rotation driving means. The gears can be driven to rotate, and the first valve plate and the second valve plate can be driven to rotate, for example, to a fully closed position or a fully opened position.

  In this case, the directions of the rotation center lines of the first drive bevel gear and the first driven bevel gear can be directed to various directions other than parallel. Moreover, the first driven bevel gear can be arranged at an arbitrary position around the rotation center line of the first drive bevel gear. The same applies to the second driving bevel gear and the second driven bevel gear.

  For this reason, the rotational drive means, the first drive bevel gear, and the rotation center line of the first valve plate and the second valve plate that are rotationally driven by the first driven bevel gear and the second driven bevel gear, respectively, The second drive bevel gear can be installed to extend in almost any direction.

  Therefore, the degree of freedom in design can be improved. And by improving the degree of freedom in this design, it becomes possible to freely design the first valve plate and the second valve plate so as to fit the inner wall surfaces of various shapes in the refrigerator compartment, and to achieve compactness. You can also.

  According to the second aspect of the present invention, for example, the first driving tooth of the first driving bevel gear meshes with the first driven tooth of the first driven bevel gear, whereby the rotational force of the rotation driving means is the first driving. The transmission is transmitted from the bevel gear to the first driven bevel gear, and the first valve plate is rotationally driven in, for example, the opening direction or the closing direction.

  Further, for example, assuming a state in which the first driving tooth and the first driven tooth are disengaged, in this state, the first large-diameter conical surface of the first driving bevel gear is the first of the first driven bevel gear. In addition to being in a state along the small-diameter conical surface, the first large-diameter conical surface is in a state along the outermost tooth surface of, for example, one end in the circumferential direction of the first driven tooth.

  Assuming that the first valve plate is in the fully closed position in the disengaged state, when the rotational force that rotates the first valve plate in the opening direction acts on the first valve plate, The outermost tooth surface at the one end of the driven tooth comes into contact with the first large-diameter conical surface of the first drive bevel gear. For this reason, the first valve plate does not rotate in the opening direction.

  Next, when the first drive bevel gear is rotationally driven in one direction so as to change from the fully closed state to the fully open state, the first drive tooth and the first driven gear are started from the point in time when the first drive tooth contacts the first driven tooth. After the meshing with the teeth starts and the first driven bevel gear rotates by the first rotation angle, the meshing between the first drive teeth and the first driven teeth is released. Then, it is assumed that the first valve plate is in the fully open position in a state where the mesh is disengaged.

  In this case, the first large-diameter conical surface of the first drive bevel gear is in a state along the first small-diameter conical surface of the first driven bevel gear, and the outermost tooth at the other end in the circumferential direction of the first driven tooth. It becomes a state along the surface. For this reason, when the rotational force that rotates the first valve plate in the closing direction acts on the first valve plate, the outermost tooth surface of the other end of the first driven tooth is the first drive bevel gear. The first valve plate does not rotate in the closing direction because it is in contact with the one large-diameter conical surface.

  Further, when the first drive bevel gear is further rotated in one direction, the first drive tooth does not mesh with the first driven tooth, so that the first valve plate can be maintained in the fully open position.

  Then, when the first driving bevel gear is rotated in the other direction, the meshing of the first driving tooth and the first driven tooth starts from the point in time when the first driving tooth contacts the first driven tooth, After the 1 driven bevel gear rotates by the first rotation angle, the first drive tooth and the first driven tooth are disengaged, and the first valve plate is in the fully closed position described above.

  Even when the first drive bevel gear is rotated in the other direction, the first drive tooth does not mesh with the first driven tooth as described above, so the first valve plate is maintained in the fully closed position. Can do.

  As described above, the first valve plate can be switched between the fully open position and the fully closed position by rotationally driving the first drive bevel gear in one or the other direction.

  Similarly, the second valve plate can be switched between the fully open position and the fully closed position by rotationally driving the second driven bevel gear in one or the other direction.

  Further, by shifting the timing at which the first driving tooth and the first driven tooth mesh with each other and the timing at which the second driving tooth meshes with the second driven tooth, for example, after the first valve plate rotates to the fully open position, It can be set so that the two valve plates rotate to the fully open position and the second valve plate rotates to the fully closed position after the first valve plate rotates to the fully closed position.

  According to the third aspect of the present invention, since the first drive bevel gear and the second drive bevel gear are provided coaxially, the rotational drive force of the rotation drive means is supplied to the first drive bevel gear and the second drive. It is possible to transmit directly to both of the bevel gears, or to transmit the rotational driving force of the rotational driving means directly to one of the first driving bevel gear and the second driving bevel gear and then to the other via the one. That is, the degree of freedom in design can be improved.

  And since the 1st drive bevel gear and the 2nd drive bevel gear are provided coaxially, the installation space of these gears can be reduced and size reduction can be attained.

  According to the invention described in claim 4, the first driven bevel gear and the second driven bevel gear are provided at positions separated by a predetermined angle around the rotation center lines of the first drive bevel gear and the second drive bevel gear, respectively. The first valve plate and the second valve plate are arranged such that their respective rotation center lines are coaxial with the respective rotation center lines of the first driven bevel gear and the second driven bevel gear. Since it is provided to extend away from the rotation center line of the two drive bevel gears, the first valve plate and the second valve plate are arranged around the rotation center lines of the first drive bevel gear and the second drive bevel gear. It can arrange | position in the position away from the said predetermined angle.

  Therefore, if the inner wall surface of the refrigerator compartment is, for example, planar, the first valve plate and the second valve plate can be arranged along the inner wall surface of the refrigerator compartment by setting the predetermined angle to 180 degrees. . Further, when the inner wall surface of the refrigerator compartment is bent at a right angle, for example, the first valve plate and the second valve plate are arranged along the inner wall surface of the refrigerator compartment by setting the predetermined angle to 90 degrees. can do.

  According to the fifth aspect of the present invention, the first rotation angle and the second rotation angle are determined by the first valve plate and the second valve plate from the fully closed state of the first opening and the second opening in the casing. Since the angle is set such that the first drive bevel gear and the second drive bevel gear are respectively rotated at an angle at which the fully open state or the fully open state can be rotated to the fully closed state, the first driven bevel gear and the second driven bevel gear are By rotating and driving, each of the first opening and the second opening of the casing can be switched from the fully closed state to the fully open state or from the fully open state to the fully closed state.

  According to the sixth aspect of the present invention, the timing at which the first drive bevel gear meshes with the first driven tooth and the timing at which the second drive tooth meshes with the second driven tooth can be changed. Therefore, the meshing of the first driving tooth and the first driven tooth and the meshing of the second driving tooth and the second driven tooth can be performed simultaneously, or the phases can be shifted. Accordingly, the first valve plate and the second valve plate can be rotated to the fully closed position or the fully open position simultaneously or with a phase shift.

  An embodiment as the best mode for carrying out the present invention will be described with reference to FIGS.

  The cold-air adjusting damper 1 of the cold-cooled refrigerator shown in this embodiment is for adjusting the flow rate of cold air supplied to the refrigerator compartment 91 in the cold-cooled refrigerator 9, as shown in FIGS. A first driving bevel gear 21 and a second driving bevel gear 22 that are rotationally driven by a driving force of a motor (rotational driving means) 11, and a first driven bevel gear 31 that is rotationally driven by the first driving bevel gear 21. The second driven bevel gear 32 rotated by the second driving bevel gear 22, the first valve plate 41 rotated by the first driven bevel gear 31, and the second driven bevel gear 32 rotated by the second driven bevel gear 32. And a two-valve plate 42.

  As shown in FIG. 8, the first drive bevel gear 21 is driven in the range in which the first driven bevel gear 31 can be rotationally driven only by the first rotation angle α1 (approximately 90 degrees in this embodiment). The first large-diameter conical surface 21b having an outer diameter along the tooth tip surface of the first drive tooth 21a is included in the range having the tooth 21a and not having the first drive tooth 21a.

  The first driven bevel gear 31 has a first driven tooth 31a that meshes with the first drive tooth 21a and is rotationally driven only by the first rotation angle α1, and a range that does not have the first driven tooth 31a. The first driven tooth 31a has a first small-diameter conical surface 31b having an outer diameter along the bottom surface.

  The second drive bevel gear 22 has second drive teeth 22a in a range in which the second driven bevel gear 32 can be rotationally driven only by the second rotation angle α2 (approximately 90 degrees in this embodiment). In addition, a second large-diameter conical surface 22b having an outer diameter along the tooth tip surface of the second drive tooth 22a is provided in a range not including the second drive tooth 22a.

  The second driven bevel gear 32 has a second driven tooth 32a that meshes with the second drive tooth 22a and is driven to rotate only at the second rotation angle α2, and does not have the second driven tooth 32a. The second driven tooth 32a has a second small-diameter conical surface 32b having an outer diameter along the bottom surface.

  The first drive bevel gear 21 and the second drive bevel gear 22 are provided coaxially on the output shaft 11 a of the motor 11. However, in the first drive bevel gear 21, the first drive teeth 21a and the first large-diameter conical surface 21b are radially inward of the second drive teeth 22a and the second large-diameter conical surface 22b of the second drive bevel gear 22. The second drive bevel gear 22 is formed with a small diameter so as to be located at a position away from the motor 11 with respect to the second drive bevel gear 22.

  Further, the rotational force of the output shaft 11a is directly transmitted to the first driving bevel gear 21 via a rotational force transmitting means such as a key (not shown). The rotational force transmitted to the one drive bevel gear 21 is transmitted via a pin 21c as a rotational force transmitting means.

  The pin 21c is formed in a cylindrical shape, and is formed so as to protrude in an axial direction from an eccentric position on the lower surface of the first drive bevel gear 21 (the surface on the side facing the second drive bevel gear). Yes. In this example, the pin 21 c is formed integrally with the first drive bevel gear 21.

  Further, a pin hole 22c that fits with the pin 21c is opened on the upper surface of the second drive bevel gear 22. The pin hole 22c is formed at a position where the first drive tooth 21a of the first drive bevel gear 21 and the second drive tooth 22a of the second drive bevel gear 22 should be in the same position in the circumferential direction. At the same time, the second drive teeth 22a are formed at positions that should be advanced by 90 degrees with respect to the first drive teeth 21a in the direction of speeding up the opening of the second valve plate.

  That is, the first drive bevel gear 21 and the second drive bevel gear 22 are provided on the output shaft 11a so that the relative positions of the first drive teeth 21a and the second drive teeth 22a can be changed around the rotation center line. Thus, the timing at which the first drive tooth 21a and the first driven tooth 31a are engaged and the timing at which the second drive tooth 22a and the second driven tooth 32a are engaged can be changed.

  7 and 11 show an example in which the pin 21c is fitted into the pin hole 22c so that the first drive tooth 21a and the second drive tooth 22a are in the same position in the circumferential direction. 13 and 14 show that the pin 21c is inserted into the pin hole 22c so that the second drive tooth 22a is positioned 90 degrees ahead of the first drive tooth 21a in the direction of opening the second valve plate 42. An example of fitting is shown.

  The first driven bevel gear 31 and the second driven bevel gear 32 are provided at positions separated by 180 degrees (predetermined angle) around the rotation center lines of the first drive bevel gear 21 and the second drive bevel gear 22, respectively. ing.

  The first valve plate 41 and the second valve plate 42 are each formed of a rectangular plate as shown in FIGS. 1, 2, and 6. Further, the first valve plate 41 and the second valve plate 42 rotate with the center in the width direction as the rotation center line, and these rotation center lines are the first driven bevel gear 31 and the second driven gear. The bevel gears 32 are arranged so as to be coaxial with the rotation center lines of the bevel gears 32 and extend in directions away from the rotation center lines of the first drive bevel gear 21 and the second drive bevel gear 22.

  That is, the rotation center shaft portions 31c and 32c of the first driven bevel gear 31 and the second driven bevel gear 32 are respectively connected to the rotation center shaft portions 41a and 42a of the first valve plate 41 and the second valve plate 42, respectively. It is connected coaxially through the section.

  Further, as shown in FIGS. 3 and 4, the first rotation angle α1 and the second rotation angle α2 are such that the first valve plate 41 and the second valve plate 42 have the first opening 52a and the second opening in the casing 5, respectively. Each of the portions 53a is set to an angle (approximately 90 degrees in this embodiment) that can be rotated from the fully closed state to the fully open state or from the fully open state to the fully closed state.

  The casing 5 stores the motor 11, the first drive bevel gear 21, the second drive bevel gear 22, the first driven bevel gear 31, and the second driven bevel gear 32, as shown in FIGS. The box portion 51 is integrally formed with a first square tube portion 52 and a second square tube portion 53 that house the first valve plate 41 and the second valve plate 42, respectively.

  As for the 1st square cylinder part 52 and the 2nd square cylinder part 53, each internal peripheral surface is the 1st opening part 52a and the 2nd opening part 53a which were mentioned above. Further, as shown in FIGS. 3 and 4, the first opening 52 a and the second opening 53 a have elastic buffer members 5 b for stopping the first valve plate 41 and the second valve plate 42 in the fully closed position. The stopper 5a provided with is provided.

  The stopper 5a and the elastic buffer member 5b are provided on each of two planes located in parallel with the rotation center lines of the first valve plate 41 and the second valve plate 42 in the first opening 52a and the second opening 53a. ing.

  The first valve plate 41 and the second valve plate 42 are configured so that the rotational force always acts in the closing direction by, for example, a torsion spring as a rotational force biasing means (not shown).

  Further, as shown in FIG. 12, the cold air adjusting damper 1 of the intercooled refrigerator is installed at a position along the inner wall surface 91 a of the refrigeration chamber 91 and in the lower portion inside the inner wall surface 91 a. ing. Further, the intercooled refrigerator 9 is provided with a motor-driven fan 93 that sends the cold air obtained via the cooler 92 to the cold air adjusting damper 1 through the inner passage of the inner wall surface 91a.

  The cold air supplied by the fan 93 is sent into the refrigerating chamber 91 under the open / close control by the first valve plate 41 and the second valve plate 42, and moves upward while cooling the refrigerating chamber 91. After entering the cooler 92 and being cooled while passing through the cooler 92, it is pressurized by the fan 93, sent to the cool air adjusting damper 1, and circulated through the path flowing into the refrigerating chamber 91 again.

  The opening and closing of the first valve plate 41 and the second valve plate 42 is a control (not shown) in order to maintain the temperature in the refrigerator compartment 91 detected by a temperature sensor (not shown) in the refrigerator compartment 91 within a predetermined set temperature range. It is controlled by a circuit.

  In the cold air adjusting damper 1 of the intercooled refrigerator configured as described above, the first driving tooth 21a of the first driving bevel gear 21 and the first driven tooth 31a of the first driven bevel gear 31 mesh with each other. Thus, the rotational force of the motor 11 is transmitted to the first valve plate 41 via the output shaft 11a, the first driving bevel gear 21 and the first driven bevel gear 31, and the first valve plate 41 is opened or closed. Will be driven to rotate.

  Similarly, when the second driving tooth 22a of the second driving bevel gear 22 and the second driven tooth 32a of the second driven bevel gear 32 are engaged with each other, the rotational force of the motor 11 is applied to the output shaft 11a and the first driving bevel. It is transmitted to the second valve plate 42 via the gear 21, the pin 21c, the pin hole 22c, the second driving bevel gear 22 and the second driven bevel gear 32, and the second valve plate 42 is rotationally driven in the opening direction or the closing direction. Will be.

  Here, the first drive tooth 21a and the first driven tooth 31a are disengaged, and the second drive tooth 22a and the second driven tooth 32a are also disengaged. In this state, it is assumed that the first valve plate 41 and the second valve plate 42 are rotated to the fully closed position. That is, in FIG. 7, it is assumed that the rotation angle of the output shaft 11a, that is, the rotation angle of the first drive bevel gear 21 and the second drive bevel gear 22 is in a state of 0 degrees.

  In this state, as shown in FIG. 8, the first large-diameter conical surface 21b of the first drive bevel gear 21 is in a state along the first small-diameter conical surface 31b of the first driven bevel gear 31, and the first One large-diameter conical surface 21b is in a state along the outermost tooth surface 31d at one end in the circumferential direction of the first driven tooth 31a, for example. Further, the second large-diameter conical surface 22b of the second drive bevel gear 22 is also in a state along the second small-diameter conical surface 32b of the second driven bevel gear 32, and one of the second driven teeth 32a in the circumferential direction, for example. It will be in the state along the outermost tooth surface 32d of the edge.

  In this state, the side edge portions of the first valve plate 41 and the second valve plate 42 are brought into close contact with the elastic buffer member 5b of the stopper 5a by the biasing force of the torsion spring. However, even without the torsion spring, the outermost tooth surface 31d at one end of the first driven tooth 31a abuts on the first large-diameter conical surface 21b of the first drive bevel gear 21, and the second driven tooth 32a. Since the outermost tooth surface 32d at one end of the second abutment comes into contact with the second large-diameter conical surface 22b of the second drive bevel gear 22, the force for maintaining the first valve plate 41 and the second valve plate 42 in the closed state is obtained. Therefore, the side edge portions of the first valve plate 41 and the second valve plate 42 can be maintained in close contact with the elastic buffer member 5b by this force.

  Next, as shown in FIG. 7, the operation of the cool air adjusting damper 1 will be further described using an example in which the first drive teeth 21a and the second drive teeth 22a are held at the same circumferential position. In this example, the first driven tooth 31a of the first driven bevel gear 31 is in a position close to the first drive tooth 21a of the first drive bevel gear 21, and the second driven tooth 32a of the second driven bevel gear 32 is the first. The two-drive bevel gear 22 is located at a position approximately 180 degrees away from the second drive teeth 22a in the circumferential direction.

  Therefore, when the output shaft 11a of the motor 11 is rotationally driven in one direction so as to rotationally drive the first valve plate 41 and the second valve plate 42 in the opening direction, the first drive bevel gear 21 and the second drive bevel gear 22 are driven. As the gear rotates, the first drive teeth 21a immediately start to mesh with the first driven teeth 31a, and the meshing progresses (see FIG. 9), and the first driven bevel gear 31 rotates by the first rotation angle α1. After that, the first drive tooth 21a and the first driven tooth 31a are disengaged (see FIG. 10). In this example, the first rotation angle α1 is 90 degrees, and the rotation angles of the first drive bevel gear 21 and the second drive bevel gear 22 are also 90 degrees.

  Therefore, only the first valve plate 41 that is rotationally driven by the first driven bevel gear 31 moves from the fully closed position shown in FIG. 3 to the fully open position. Further, as shown in FIG. 11, only the first valve plate 41 is fully opened.

  In this state, the first large-diameter conical surface 21b of the first drive bevel gear 21 is in a state along the first small-diameter conical surface 31b of the first driven bevel gear 31, as shown in FIG. It will be in the state along the outermost tooth surface 31e of the other end of the circumferential direction in the driven tooth 31a. Therefore, a rotational force that rotates the first valve plate 41 in the closing direction is applied by the torsion spring, but the outermost tooth surface 31e at the other end of the first driven tooth 31a is Since it contacts the first large-diameter conical surface 21b, the first valve plate 41 does not rotate in the closing direction, and the first valve plate 41 does not generate noise due to vibration in the fully open position.

  Next, as shown in FIG. 7, the first drive bevel gear 21 and the second drive bevel gear 22 are further rotated in one direction from 90 degrees to 180 degrees. In this case, since the first drive teeth 21a do not mesh with the first driven teeth 31a, the first valve plate 41 is maintained in the fully open position.

  Further, since the second driving tooth 22a does not mesh with the second driven tooth 32a, the second valve plate 42 is maintained in the fully closed position. However, when the second drive bevel gear 22 is rotated up to 180 degrees, the second drive teeth 22a are brought close to the second driven teeth 32a (see FIG. 8).

  Next, as shown in FIG. 7, the first drive bevel gear 21 and the second drive bevel gear 22 are further rotationally driven in one direction from 180 degrees to 270 degrees. Then, the second drive tooth 22a and the second driven tooth 32a start to mesh (see FIG. 9), and after the second driven bevel gear 32 rotates by the second rotation angle α2, the second drive tooth 22a and the second driven tooth 32a The engagement with the driven tooth 32a is released (see FIG. 10). In this case, the second rotation angle α2 is 90 degrees.

  For this reason, the second valve plate 42 moves from the fully closed position shown in FIG. 4 to the fully opened position. That is, as shown in FIG. 11, the second valve plate 42 is fully opened. Moreover, since the 1st drive tooth 21a and the 1st driven tooth 31a do not mesh, the 1st valve plate 41 is maintained in a fully open position.

  The second large-diameter conical surface 22b of the second driven bevel gear 32 is in a state along the second small-diameter conical surface 32b of the second driven bevel gear 32 as shown in FIG. It will be in the state along the outermost tooth surface 32e of the other end of the circumferential direction in 32a. In addition, a rotational force that rotates the second valve plate 42 in the closing direction is applied by the torsion spring, but the outermost tooth surface 32e at the other end of the second driven tooth 32a is the second drive bevel gear 22 of the second drive bevel gear 22. The second valve plate 42 does not rotate in the closing direction because it abuts against the two large-diameter conical surfaces 22b, and the second valve plate 42 does not generate noise due to vibration in the fully open position.

  Further, when the first drive bevel gear 21 and the second drive bevel gear 22 are rotationally driven in one direction from 270 degrees to 360 degrees, the first drive teeth 21a do not mesh with the first driven teeth 31a, Further, since the second drive teeth 22a do not mesh with the second driven teeth 32a, the first valve plate 41 and the second valve plate 42 are held in the fully open position.

  On the other hand, when the first drive bevel gear 21 and the second drive bevel gear 22 are rotationally driven in the other direction opposite to the above from the position of 270 to 360 degrees to the position of 0 degrees, from the point of reaching 270 degrees. When the second valve plate 42 starts to close and reaches 180 degrees, the second valve plate 42 is fully closed. Furthermore, the first valve plate 41 starts to close when reaching 90 degrees, and the first valve plate 41 is fully closed when reaching 0 degrees.

  As described above, the first valve plate 41 and the second valve plate 42 can be switched between the fully open position and the fully closed position by rotationally driving the output shaft 11a in one or other directions. That is, by controlling the output shaft 11a to be maintained at 0 degrees, the first valve plate 41 and the second valve plate 42 can be held in a fully closed state, and the output shaft 11a is maintained between 90 degrees and 180 degrees. By controlling so that the first valve plate 41 is fully opened and the second valve plate 42 is fully closed, the output shaft 11a is controlled to be maintained between 270 degrees and 360 degrees. As a result, the first valve plate 41 and the second valve plate 42 can be held in a fully open state.

  On the other hand, as shown in FIG. 13, when the second drive teeth 22a are positioned 90 degrees ahead of the first drive teeth 21a in the direction of opening the second valve plate 42, the output shaft By controlling to maintain 11a at 0 degrees, the first valve plate 41 and the second valve plate 42 can be held in a fully closed state, and by controlling to maintain the output shaft 11a at 90 degrees, The first valve plate 41 can be held in a fully open state, the second valve plate 42 can be held in a fully closed state, and the first valve plate 41 can be controlled by maintaining the output shaft 11a between 180 degrees and 360 degrees. And the 2nd valve plate 42 can be hold | maintained in a fully open state (refer FIG. 14).

  Therefore, by controlling the rotation angle of the output shaft 11a by the motor 11, the flow rate of the cold air flowing into the refrigerating chamber 91 can be controlled stepwise, so that the temperature of the refrigerating chamber 91 can be controlled more precisely. it can.

  Further, since the first driving bevel gear 21 and the second driving bevel gear 22 are provided coaxially, the rotational driving force of the motor 11 is supplied to the first via the output shaft 11a as in the present embodiment. After transmitting directly to the driving bevel gear 21, it can be transmitted to the second driving bevel gear 22 via the pin 21c or the like. It is also possible to design such that the rotational driving force of the motor 11 is directly transmitted to both the first driving bevel gear 21 and the second driving bevel gear 22 via the output shaft 11a by a rotational force transmitting means such as a key. . That is, the degree of freedom in design can be improved.

  And since the 1st drive bevel gear 21 and the 2nd drive bevel gear 22 are provided coaxially, the installation space of these gears 21 and 22 can be reduced, and size reduction can be achieved. . Therefore, the capacity of the refrigerator compartment 91 can be increased.

  The rotation center lines of the first valve plate 41 and the second valve plate 42 are provided at positions 180 degrees apart around the rotation center lines of the first drive bevel gear 21 and the second drive bevel gear 22. Therefore, the said 1st valve plate 41 and the 2nd valve plate 42 can be arrange | positioned along the inner side of the planar inner wall surface 91a in the refrigerator compartment 91. FIG. Therefore, since the space occupied by the cold air adjusting damper 1 can be reduced, the capacity of the refrigerator compartment 91 can be increased.

  Further, the respective rotation center lines of the first valve plate 41 and the second valve plate 42 are provided at positions separated by, for example, 90 degrees around the rotation center lines of the first drive bevel gear 21 and the second drive bevel gear 22. In this case, the first valve plate 41 and the second valve plate 42 can be arranged along the inner wall surface 91a bent at a right angle in the refrigerator compartment 91. Also in this case, since the space occupied by the cold air adjusting damper 1 can be reduced, the capacity of the refrigerator compartment 91 can be increased.

  Further, since the relative positions of the first drive teeth 21a and the second drive teeth 22a around the rotation center line of the first drive bevel gear 21 and the second drive bevel gear 22 are configured to be changeable, the first valve plate 41 and the second valve plate 42 can be opened and closed at different timings. Further, the first valve plate 41 and the second valve plate 42 can be simultaneously opened and closed by providing the pin holes 22c at different positions.

  In the above-described embodiment, the rotation center lines of the first driven bevel gear 31 and the second driven bevel gear 32 are 180 degrees around the rotation center lines of the first drive bevel gear 21 and the second drive bevel gear 22. Although an example directed in a direction away from each other has been shown, the respective rotation center lines of the first driven bevel gear 31 and the second driven bevel gear 32 may be configured to be directed in various directions other than the above 180 degrees. In this way, the respective rotation center lines of the first valve plate 41 and the second valve plate 42 can be directed in various directions.

  Therefore, since the degree of freedom in design can be improved, it is possible to freely design the first valve plate 41 and the second valve plate 42 so as to fit various shapes of the inner wall surface 91a in the refrigerator compartment 91. In addition, the space occupied by the cool air adjusting damper 1 can be reduced.

  Further, in each of the above-described examples, by providing a plurality of pin holes 22c into which the pins 21c are inserted, the timing at which the first driving tooth 21a and the first driven tooth 31a are engaged, the second driving tooth 22a and the second driven tooth. Although the timing of meshing with 32a can be changed, as shown in FIGS. 15 and 16, the first drive bevel gear 22 is changed to the second drive bevel gear 22 having arc-shaped elongated holes 22d having different lengths. The timing at which the teeth 21a mesh with the first driven teeth 31a and the timing at which the second drive teeth 22a mesh with the second driven teeth 32a may be configured to be changeable.

  In this case, the arc-shaped long hole 22d shown in FIG. 15 is formed on the upper surface of the second drive bevel gear 22, and is slightly wider than the diameter of the pin 21c so that the pin 21c can move in the circumferential direction. And is formed in a circular arc shape coaxial with the rotation center of the second drive bevel gear 22 and at an angle around the rotation center of the second drive bevel gear 22 within a range of 180 degrees. . Further, the arc-shaped long hole 22d rotates the output shaft 11a to open the first valve plate 41 and the second valve plate 42 when the rotation angle of the output shaft 11a is 0 degree (that is, in the closed state). The rear end in the opening direction is formed so as to contact the pin 21c.

  When the rotation angle of the output shaft 11a is 0 degree, the first driving tooth 21a of the first driving bevel gear 21 is in a position close to the first driven tooth 31a of the first driven bevel gear 31, and the second The second driving tooth 22 a of the driving bevel gear 22 is in a position close to the second driven tooth 32 a of the second driven bevel gear 32. In other words, the second drive teeth 22 a of the second drive bevel gear 22 are arranged at positions advanced 180 degrees in the opening direction around the rotation center with respect to the first drive teeth 21 a of the first drive bevel gear 21.

  When the arc-shaped long hole 22d in the range of 180 degrees is provided, first, when the rotation angle of the output shaft 11a is 0 degrees, the first valve plate 41 and the second valve are rotated by the torsion spring as described above. The side edge of the plate 42 can be maintained in close contact with the elastic buffer member 5b of the stopper 5a.

  Here, when the output shaft 11a is rotationally driven in an opening direction, which is one direction, the first driving tooth 21a starts to mesh with the first driven tooth 31a, and after the first driven bevel gear 31 rotates 90 degrees, the first driven tooth The rotation of the bevel gear 31 stops. As a result, only the first valve plate 41 is fully opened.

  Further, when the first drive bevel gear 21 is rotated 180 degrees in one direction, the pin 21c comes into contact with the distal end portion of the arc-shaped elongated hole 22d in the opening direction. For this reason, the second driving bevel gear 22 is driven to rotate in one direction from the time when the first driving bevel gear 21 rotates 180 degrees in one direction, and the second driving tooth 22a is changed to the second driven tooth 32a. At the start of meshing, the second driven bevel gear 32 is also rotationally driven. Then, when the second driven bevel gear 32 rotates 90 degrees, the rotation of the second driven bevel gear 32 stops. As a result, the second valve plate 42 is also fully opened.

  Further, when the output shaft 11a is further rotated in one direction from 270 degrees to 360 degrees, the first drive teeth 21a do not mesh with the first driven teeth 31a, and the second drive teeth 22a are second driven. Since the teeth 32a are not engaged with each other, the first valve plate 41 and the second valve plate 42 are held in the fully open position.

  On the other hand, when the output shaft 11a is rotated to 270 degrees, the output shaft 11a is stopped, whereby the second valve plate 42 is fully opened, and the output shaft 11a is moved in the other direction from the rotation angle of 0 degrees. When it is rotationally driven in a certain closing direction, the driving of the second drive bevel gear 22 is started from the point of reaching 90 degrees, and the second drive tooth 22a starts to mesh with the second driven tooth 32a. At the same time, the first drive teeth 21a of the first drive bevel gear 21 begin to mesh with the first driven teeth 31a. For this reason, when the output shaft 11a reaches 90 degrees, the first valve plate 41 and the second valve plate 42 begin to close simultaneously, and when the output shaft 11a reaches 0 degrees, the first valve plate 41 and the second valve plate 42 Fully closed.

  As described above, the first valve plate 41 and the second valve plate 42 can be switched between the fully open position and the fully closed position by rotationally driving the output shaft 11a in one or other directions.

  On the other hand, the arc-shaped long hole 22d shown in FIG. 16 is formed in an angle range of 90 degrees with the output shaft 11a as the center, and the rotation angle of the output shaft 11a is 0 degrees (ie, closed state). , The rear end of the output shaft 11a is formed to abut against the pin 21c with respect to the direction in which the output shaft 11a rotates in the opening direction. When the rotation angle of the output shaft 11a is 0 degree, the first driven tooth 31a of the first driven bevel gear 31 is in a position close to the first drive tooth 21a of the first drive bevel gear 21, and the second driven tooth The second driven tooth 32 a of the bevel gear 32 is located in the vicinity of the second drive tooth 22 a of the second drive bevel gear 22. In other words, the second drive teeth 22 a of the second drive bevel gear 22 are arranged at positions advanced 180 degrees in the opening direction around the rotation center with respect to the first drive teeth 21 a of the first drive bevel gear 21. The other configuration is the same as that of the arc-shaped long hole 22d in the range of 180 degrees shown in FIG.

  When the arc-shaped long hole 22d in the range of 90 degrees is provided, the first valve plate 41 and the second valve plate 42 are held in a fully closed state by controlling the output shaft 11a to be maintained at 0 degrees. The first valve plate 41 can be fully opened by rotating the output shaft 11a from 0 degrees to 90 degrees, and the second can be achieved by rotating the output shaft 11a from 90 degrees to 180 degrees. The valve plate 42 can also be fully opened.

  Further, when the output shaft 11a is rotated to 270 degrees, the output shaft 11a is stopped, and from this state the second valve plate 42 is fully opened, the output shaft 11a is moved to the position where the rotation angle is 0 degrees in the other direction. When rotationally driven in a certain closing direction, the first valve plate 41 and the second valve plate 42 start to close at the same time from reaching 90 degrees, and at the time of reaching 0 degrees, the first valve plate 41 and the second valve plate 42 are started. Is fully closed.

It is sectional drawing which shows the damper for cold air adjustment of the cold cooling refrigerator shown as one Embodiment of this invention. It is a principal part perspective view of the damper for cold air adjustment of the same-type cold refrigerator. It is a figure which shows the damper for cold air | gas adjustments of a cold refrigerator in the same, Comprising: It is sectional drawing which follows the III-III line of FIG. It is a figure which shows the damper for cold air | gas adjustments of a cold refrigerator in the same, Comprising: It is sectional drawing which follows the IV-IV line of FIG. It is a figure which shows the damper for cold air | gas adjustments of a cold refrigerator in the same, Comprising: It is sectional drawing which follows the VV line of FIG. It is a front view of the damper for cold air adjustment of the same-type refrigerator. It is a figure which shows the damper for cold air | gas adjustment of a cold refrigerator in the same, Comprising: The relationship between the rotation angle of a 1st drive bevel gear and a 2nd drive bevel gear, and the rotation angle of a 1st driven bevel gear and a 2nd driven bevel gear It is explanatory drawing which shows. It is a figure which shows the damper for cold air | gas adjustment of a cold refrigerator between the same, Comprising: Explanation which shows the state just before a 1st drive bevel gearwheel and a 2nd drive bevel gearwheel, and a 1st driven bevel gearwheel and a 2nd driven bevel gearwheel mesh | engage FIG. It is a figure which shows the damper for cold air | gas adjustment of a cold refrigerator between the same, Comprising: The explanatory view which shows the state which the 1st drive bevel gearwheel and the 2nd drive bevel gearwheel, and the 1st driven bevel gearwheel and the 2nd driven bevel gearwheel meshed It is. It is a figure which shows the damper for cold air adjustment of a cold refrigerator between the same, Comprising: The state immediately after mesh | engagement with a 1st drive bevel gearwheel and a 2nd drive bevel gearwheel, and a 1st driven bevel gearwheel and a 2nd driven bevel gearwheel It is explanatory drawing which shows. It is a figure which shows the damper for cold air | gas adjustment of a cold refrigerator of the same, Comprising: It is a diagram which shows the open / close state of a 1st valve plate and a 2nd valve plate. It is sectional drawing which shows the refrigerator which installed the damper for cold air adjustment of the same-type cold refrigerator. It is a figure which shows the damper for cold air | gas adjustment of a cold refrigerator in the same, Comprising: The relationship between the rotation angle of a 1st drive bevel gear and a 2nd drive bevel gear, and the rotation angle of a 1st driven bevel gear and a 2nd driven bevel gear It is explanatory drawing which shows the other example about. It is a figure which shows the damper for cold air | gas adjustments of the same cold refrigerator, Comprising: It is a diagram which shows the open / close state of the 1st valve plate at the time of using the said other example, and a 2nd valve plate. It is a figure which shows the damper for cold air | gas adjustment of a cold refrigerator in the same, Comprising: It replaces with a pin hole, and the rotation of the 1st drive bevel gear and the 2nd drive bevel gear at the time of using the arc-shaped long hole of the range of 180 degree | times It is explanatory drawing which shows the relationship between an angle and the rotation angle of a 1st driven bevel gear and a 2nd driven bevel gear. It is a figure which shows the damper for cold air adjustment of the same type cold refrigerator, Comprising: Instead of a pin hole, the rotation of a 1st drive bevel gear and a 2nd drive bevel gear at the time of using the arc-shaped long hole of the range of 90 degree It is explanatory drawing which shows the relationship between an angle and the rotation angle of a 1st driven bevel gear and a 2nd driven bevel gear.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cold-air-conditioning damper of an intercooled refrigerator 5 Casing 9 Refrigerator 11 Motor (rotation drive means)
11a Output shaft 21 1st drive bevel gear 21a 1st drive tooth 21b 1st large diameter conical surface 21c pin 22 2nd drive bevel gear 22a 2nd drive tooth 22b 2nd large diameter conical surface 22c Pin hole 22d Arc-shaped long hole 31 1st driven bevel gear 31a 1st driven tooth 31b 1st small diameter conical surface 31c, 32c, 41a, 42a Rotation center axis part 32 2nd driven bevel gear 32a 2nd driven tooth 32b 2nd small diameter conical surface 41 1st valve plate 42 Second valve plate 52a First opening 53a Second opening 91 Refrigerating chamber 91a Inner wall surface α1 First rotation angle α2 Second rotation angle

Claims (6)

It is a damper for adjusting the cold air of a cold refrigerator for adjusting the flow rate of the cold air supplied to the refrigerator compartment,
A first drive bevel gear and a second drive bevel gear that are rotationally driven by the rotational drive means;
A first driven bevel gear rotated by the first drive bevel gear;
A second driven bevel gear rotated by the second drive bevel gear;
A first valve plate rotationally driven by the first driven bevel gear;
A cold air adjusting damper for a cold-cooled refrigerator, comprising: a second valve plate that is rotationally driven by the second driven bevel gear. The first drive bevel gear has first drive teeth in a range in which the first driven bevel gear can be rotationally driven only by a first rotation angle, and does not have the first drive teeth. A first large-diameter conical surface having an outer diameter along the tip surface of the first drive tooth in the range;
The first driven bevel gear has a first driven tooth that meshes with the first driving tooth and is driven to rotate only by the first rotation angle, and is in a range not having the first driven tooth. A first small-diameter conical surface having an outer diameter along the root surface of the first driven tooth;
The second drive bevel gear has a second drive tooth in a range in which the second driven bevel gear can be rotationally driven only by a second rotation angle, and does not have the second drive tooth. A second large-diameter conical surface having an outer diameter along the tip surface of the second drive tooth in the range;
The second driven bevel gear has a second driven tooth that meshes with the second driving tooth and is driven to rotate only by the second rotation angle, and is in a range not having the second driven tooth. The damper for cold-air adjustment of the cold refrigerator according to claim 1, further comprising a second small-diameter conical surface having an outer diameter along a bottom surface of the second driven tooth.   The damper for cold air adjustment of a cold refrigerator according to claim 1 or 2, wherein the first drive bevel gear and the second drive bevel gear are provided coaxially. The first driven bevel gear and the second driven bevel gear are provided at positions separated by a predetermined angle around the rotation center lines of the first drive bevel gear and the second drive bevel gear, respectively.
The first valve plate and the second valve plate are arranged such that their respective rotation center lines are coaxial with the respective rotation center lines of the first driven bevel gear and the second driven bevel gear. 4. The damper for cold air adjustment of a cold-cooled refrigerator according to claim 3, wherein the damper is provided to extend in a direction away from a rotation center line of the drive bevel gear and the second drive bevel gear.   The first rotation angle and the second rotation angle are determined based on whether the first valve plate and the second valve plate have the first opening and the second opening in the casing from the fully closed state to the fully open state or from the fully open state, respectively. The damper for cold-air adjustment of the cold-cooled refrigerator according to any one of claims 2 to 4, wherein the damper is set to an angle capable of rotating in a closed state.   In the first driving bevel gear and the second driving bevel gear, the timing at which the first driving tooth and the first driven tooth mesh with each other and the timing at which the second driving tooth and the second driven tooth mesh with each other are changed. The damper for cold-air adjustment of the cold-cooled refrigerator in any one of Claims 2-5 characterized by the above-mentioned.

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