Ball valve and vehicle thermal management device comprising same
An embodiment discloses a ball valve and a vehicle thermal management device including the same, in which the ball valve controls a movement of a refrigerant moving along the inside thereof or selectively expands the moving refrigerant by controlling a rotational position of a ball by using a ball having grooves and an actuator configured to control a rotation of the ball. Accordingly, the vehicle thermal management device may be implemented in a compact size while improving cooling/heating performance.
1 . A ball valve, comprising:
a housing including a first housing hole, a second housing hole, and a third housing hole disposed to communicate with one another;
a ball rotatably disposed in the housing;
an actuator configured to rotate the ball;
a ring-shaped first sealing part disposed in the first housing hole while facing the ball; and
a ring-shaped second sealing part disposed in the second housing hole while facing the ball,
wherein the ball comprises:
a ball body having a spherical shape;
first and second holes disposed in the ball body and configured to communicate with each other; and
two grooves formed to have a predetermined length in a circumferential direction of the ball body so as to be connected to the first hole,
wherein the second hole is disposed to correspond to the third housing hole, and
wherein based on a rotation center, a first included angle defined between the two grooves is larger than a second included angle defined between one point disposed on an inner diameter of the ring-shaped first sealing part and one point disposed on an inner diameter of the ring-shaped second sealing part so as to be adjacent, in the circumferential direction, to the one point disposed on the inner diameter of the ring-shaped first sealing part.
2 . The ball valve of claim 1 , wherein the two grooves of the ball are positioned at positions that do not communicate with the first housing hole and the second housing hole.
3 . The ball valve of claim 1 , wherein an end of one of the two grooves is disposed to communicate with the first housing hole, and an end of a remaining groove of the two grooves is disposed to communicate with the second housing hole.
4 . The ball valve of claim 1 , wherein the ball comprises a groove coupled to the actuator.
5 . The ball valve of claim 1 , wherein the inner diameter of the ring-shaped first sealing part and the inner diameter of the ring-shaped second sealing part are equal to a diameter of the first hole.
6 . The ball valve of claim 1 , comprising:
a support means configured to prevent separation of the ring-shaped first sealing part,
wherein the support means is detachably coupled in the first housing hole.
7 . The ball valve of claim 1 , wherein a connection portion of the actuator is disposed to overlap the second hole in an axial direction.
8 . The ball valve of claim 1 , wherein a diameter of the first hole is equal to a diameter of the second hole.
9 . The ball valve of claim 1 , wherein a diameter of the first hole is smaller than a diameter of the second hole.
10 . The ball valve of claim 1 , wherein a depth of each of the two grooves decreases toward an end side thereof.
11 . A vehicle thermal management device, comprising:
a compressor configured to compress and circulate a refrigerant;
a first heat exchanger in which the compressed refrigerant is introduced and exchanges heat with another heat exchange medium;
a second heat exchanger configured to exchange heat with air present outside an occupant compartment;
a third heat exchanger mounted in an air conditioning device and configured to exchange heat with air discharged into the occupant compartment; and
a vapor injection module configured to introduce a gaseous refrigerant into the compressor,
wherein the vapor injection module comprises a first expansion means group, a second expansion means group, and a gas-liquid separator,
wherein a first expansion means of the first expansion means group and a third expansion means of the second expansion means group each comprise:
a housing including a first housing hole, a second housing hole, and a third housing hole disposed to communicate with one another;
a ball rotatably disposed in the housing;
an actuator configured to rotate the ball;
a ring-shaped first sealing part disposed in the first housing hole while facing the ball; and
a ring-shaped second sealing part disposed in the second housing hole while facing the ball,
wherein the ball comprises:
a ball body having a spherical shape;
first and second holes disposed in the ball body and configured to communicate with each other; and
first and second grooves formed to have a predetermined length in a circumferential direction of the ball body so as to be connected to the first hole, and
wherein based on a rotation center, a first included angle defined between the first and second grooves is smaller than a second included angle defined between one point disposed on an inner diameter of the ring-shaped first sealing part and one point disposed on an inner diameter of the ring-shaped second sealing part so as to be adjacent, in the circumferential direction, to the one point disposed on the inner diameter of the ring-shaped first sealing part.
12 . The vehicle thermal management device of claim 11 , wherein the refrigerant having passed through the second heat exchanger is introduced into the first expansion means group in a cooling mode, and the refrigerant having passed through the first heat exchanger is introduced into the second expansion means group in a heating mode.
13 . The vehicle thermal management device of claim 11 , wherein the first expansion means group comprises:
the first expansion means;
a second expansion means; and
a third flow path configured to connect an outlet of the first heat exchanger to the first expansion means and the second expansion means, and
wherein the second expansion means group comprises:
the third expansion means;
a fourth expansion means; and
a fourth flow path configured to connect an outlet of the second heat exchanger to the third expansion means and the fourth expansion means through a third branching part.
14 . The vehicle thermal management device of claim 13 , wherein the first expansion means and the third expansion means are connected in parallel to a liquid outlet of the gas-liquid separator, the second expansion means and the fourth expansion means are connected in parallel to an inlet of the gas-liquid separator, and a gas outlet of the gas-liquid separator is connected to the compressor.
15 . The vehicle thermal management device of claim 14 , comprising:
a first line configured to connect the compressor, the first heat exchanger, the vapor injection module, the third heat exchanger, and an accumulator;
a second line configured to connect the vapor injection module and the second heat exchanger;
a third line configured to connect the vapor injection module and the compressor;
a fourth line having one side connected to the first line between the third heat exchanger and the accumulator, and another side connected to the second line between the second heat exchanger and the vapor injection module; and
a chiller and a fifth expansion means disposed on the fourth line,
wherein the refrigerant moving along the fourth line and a coolant moving along a fifth line exchange heat with each other in the chiller.
16 . A vehicle thermal management device including:
a compressor configured to compress and circulate a refrigerant;
a first heat exchanger in which the compressed refrigerant is introduced and exchanges heat with another heat exchange medium;
a second heat exchanger configured to exchange heat with air present outside an occupant compartment;
a chiller; and
a ball valve configured to move the refrigerant, which passes through the first heat exchanger, to at least any one of the second heat exchanger and the chiller,
wherein the ball valve comprises:
a housing including a first housing hole, a second housing hole, and a third housing hole disposed to communicate with one another;
a ball rotatably disposed in the housing;
an actuator configured to rotate the ball;
a ring-shaped first sealing part disposed in the first housing hole while facing the ball; and
a ring-shaped second sealing part disposed in the second housing hole while facing the ball,
wherein the ball comprises:
a ball body having a spherical shape;
first and second holes disposed in the ball body and configured to communicate with each other; and
first and second grooves formed to have a predetermined length in a circumferential direction of the ball body so as to be connected to the first hole, and
wherein based on a rotation center, a first included angle defined between the first and second grooves is larger than a second included angle defined between one point disposed on an inner diameter of the ring-shaped first sealing part and one point disposed on an inner diameter of the ring-shaped second sealing part so as to be adjacent, in the circumferential direction, to the one point disposed on the inner diameter of the ring-shaped first sealing part.
17 . The vehicle thermal management device of claim 16 , in which in an outdoor unit heat absorption mode, the ball rotates to a position at which the first housing hole and the first groove partially face and communicate with each other, and the refrigerant having passed through the first heat exchanger bypasses the chiller, is expanded in the ball valve, and then introduced into the second heat exchanger.
18 . The vehicle thermal management device of claim 16 , in which in a waste heat absorption mode, the ball rotates to a position at which the second housing hole and the second groove partially face and communicate with each other, the refrigerant having passed through the first heat exchanger bypasses the second heat exchanger, is expanded in the ball valve, and then introduced into the chiller, and the refrigerant and a coolant moving along a fifth line exchange heat with each other in the chiller.
19 . The vehicle thermal management device of claim 16 , in which in a parallel heat absorption mode, the ball rotates to a position at which the first housing hole and the first groove partially communicate with each other and the second housing hole and the second groove partially communicate with each other, the refrigerant having passed through the first heat exchanger implements bidirectional expansion in the ball valve and then is introduced into the second heat exchanger and the chiller, and the refrigerant and a coolant moving along a fifth line exchange heat with each other in the chiller.