1. A vehicular air conditioner equipped with a blower fan, an air conditioner casing having a flow path through which air flows and a blower opening for blowing the air into interior of a vehicle cabin, a cooling unit disposed in interior of the air conditioner casing configured to cool the air, and a heating unit disposed in the interior of the air conditioner casing configured to heat the air, the flow path including a cold air passage in which the cooling unit is arranged, a warm air passage formed on a downstream side of the cold air passage and in which the heating unit is arranged, and a bypass passage provided on a downstream side of the cooling unit in bypassing relation to the heating unit, wherein air, which has passed through the warm air passage and the bypass passage, is blown into the interior of the vehicle cabin from the blower opening, the vehicular air conditioner comprising:
an air mixing damper disposed on a downstream side of the cooling unit for adjusting a proportion at which air is blown into a warm air opening that communicates from the cold air passage to the warm air passage, and into a cold air opening that communicates from the cold air passage to the bypass passage; and
a drive mechanism configured to drive the air mixing damper, wherein:
the air mixing damper includes a first damper configured to open and close one of the warm air opening and the cold air opening, and a second damper configured to open and close another of the warm air opening and the cold air opening; and
the drive mechanism includes a drive source that is rotated to drive the first and second dampers, the first damper being turned proportional to a rotational angle of the drive source over entirety of a rotary driven range of the drive source, and the second damper being turned such that a temperature of the air blown from the blower opening and the rotational angle of the drive source establish a linear relationship or a substantially linear relationship.
2. The vehicular air conditioner according to claim 1, wherein the drive mechanism comprises:
the drive source;
a link plate connected to the drive source and including first and second link grooves;
a first driven link, which is engaged with the first link groove and transmits rotation of the link plate to the first damper; and
a second driven link, which is engaged with the second link groove and transmits rotation of the link plate to the second damper,
wherein the link plate comprises a rotary shaft to which the drive source is connected, the first link groove being formed such that a radius thereof about the rotary shaft changes at a constant rate of change over an entire range by which the first damper is turned, and the second link groove being formed such that a radius thereof about the rotary shaft undergoes a change at a midway point within the entire range by which the first damper is turned.
3. The vehicular air conditioner according to claim 1, wherein:
the first damper is a warm air damper that closes the warm air opening, and the second damper is a cold air damper that closes the cold air opening; and
when closing the bypass passage with the cold air damper, the cold air damper is rotated at a high speed until reaching a predetermined angle, and is rotated at a low speed after having reached the predetermined angle.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A small-hole electrical discharge machining device, comprising:
a controller which controls vertical movement of a rod electrode for small-hole machining, and guides an electrode guide guiding a lower end portion of the rod electrode;
a work tank which reserves a working fluid in which a work is machined;
a working-fluid discharger which is provided in the work tank and discharges the working fluid;
a diaphragm which moves vertically along the discharger and adjusts a height of the working fluid;
a hoisting unit which moves the diaphragm vertically in response to vertical movement of the electrode guide; and
a working-fluid supply unit, which supplies the working fluid to the work tank, wherein
the controller keeps a distance between a fluid level of the working fluid and the electrode guide constant.
2. The small-hole electrical discharge machining device according to claim 1, wherein
the hoisting unit comprises a master cylinder which operates in correspondence to vertical movement of the electrode guide, and a slave cylinder which is connected with the master cylinder through a pipeline and moves by a same distance as the master cylinder.
3. The small-hole electrical discharge machining device according to claim 1, wherein
the hoisting unit further comprises one pair of first chains which can be rotated and moved along the working-fluid discharger at both sides thereof,
wherein a lower end portion of the diaphragm is folded in a U-shaped which rotates around a roller driven by the pair of first chains, and both end portions of an upper portion of the diaphragm are connected with the pair of first chains, and wherein
a second chain which is driven by the pair of first chains is provided in parallel to the first chains and a slave cylinder is provided in connection with the second chain.
4. The small-hole electrical discharge machining device according to claim 3, wherein
one pair of fluid-level detecting units, which protrude into the inside of the work tank from the working-fluid discharger, are provided at the upper end portion of the diaphragm and are set so that fluid levels detected by the pair of detecting units are different from each other, and
detection signals detected by the pair of fluid-level detecting units are output to the controller.
5. The small-hole electrical discharge machining device according to claim 1, wherein
a turntable in the work tank, to which the work fixes, rotates about an axis parallel to a vertical direction in which the electrode guide moves and about an axis perpendicular to the vertical direction in which the electrode guide moves.
6. A multiple diesinking-and-small-hole electrical discharge machining devices comprising:
a controller which controls vertical movement of a rod electrode for small hole machining, an electrode guide which guides a lower end portion of the rod electrode and an electrode for diesinking which is provided on the electrode guide, the electrode for diesinking comprising a through hole into which the rod electrode penetrates, and moving vertically in parallel to the rod electrode;
a work tank which reserves a working fluid in which a work is machined;
a working-fluid discharger which is provided in the work tank and discharges the working fluid;
a diaphragm which moves vertically along the discharger and adjusts a height of the working fluid;
a hoisting unit which moves the diaphragm vertically in response to vertical movement of the electrode guide; and
a working-fluid supply unit, which supplies the working fluid to the work tank, wherein
the controller keeps a distance between a fluid level of the working fluid and the electrode guide constant.
7. The multiple diesinking-and-small-hole electrical discharge machining device according to claim 6, wherein
the hoisting unit comprises a master cylinder which operates in correspondence to vertical movement of the electrode guide, and a slave cylinder which is connected with the master cylinder through a pipeline and moves by a same distance as the master cylinder.
8. The multiple diesinking-and-small-hole electrical discharge machining device according to claim 6, wherein
a turntable rotates about an axis parallel to a vertical direction in which the electrode guide moves and about an axis perpendicular to the vertical direction in which the electrode guide moves, and moves in a direction perpendicular to the vertical direction in which the electrode guide moves.
9. The multiple diesinking-and-small-hole electrical discharge machining device according to claim 6, wherein
the hoisting unit further comprises one pair of first chains which rotate and move along the working-fluid discharger at both sides thereof,
a lower end portion of the diaphragm is folded in a U-shape and rotates around a roller driven by the one pair of first chains,
both end portions of an upper portion of the diaphragm are connected with the one pair of first chains, and
a second chain which is driven by the one pair of first chains is provided in parallel to the first one pair of chains and a slave cylinder is provided in connection with the second chain.
10. A method for multiple diesinking-and-small-hole electrical discharge machining, which uses an electrical discharge machining device comprising:
a controller which controls vertical movement of a rod electrode for small hole machining, an electrode guide which guides a lower end portion of the rod electrode and an electrode for diesinking electrical discharge machining which is provided on the electrode guide as one body, the electrode for diesinking comprising a through hole into which the rod electrode penetrates, and moving vertically in parallel to the rod electrode;
a work tank which reserves a working fluid in which a work is machined;
a working-fluid discharger which is provided in the work tank and discharges the working fluid;
a diaphragm which moves vertically along the discharger and adjusts a height of the working fluid;
a hoisting unit which moves the diaphragm vertically corresponding to vertical movement of the electrode guide; and
a working-fluid supply unit, which supplies the working fluid to the work tank, the method comprising:
moving the electrode for diesinking and the electrode guide toward the work;
moving the electrode for diesinking and the electrode guide while the hoisting unit is moved in order to keep a distance between the work and the electrode guide constant while a depth of the working fluid is set at a predetermined depth for diesinking electrical discharge machining;
executing diesinking electrical discharge machining;
moving the rod electrode and the electrode guide towards the work;
moving the electrode guide and the rod electrode while the hoisting unit is moved in order to keep the distance between the work and the electrode guide constant while the depth of the working fluid is set at a predetermined depth for small-hole electrical discharge machining; and
executing small-hole electrical discharge machining.