Vehicular heat management system

1. A vehicular heat management system comprising:

a first pump and a second pump drawing and discharging a heating medium;

more than or equal to three of heating medium passing devices in which the heating medium flows; and

a switching section switching a flow of the heating medium with respect to the more than or equal to three of heating medium passing devices, wherein

the switching section has a first valve body, a second valve body, a third valve body, and a fourth valve body,

each of the more than or equal to three of heating medium passing devices is directly connected to the first and second valve bodies at a position downstream of the first and second valve bodies through first and second paths, respectively, and is directly connected to the third and fourth valve bodies at a position upstream of the third and fourth valve bodies through third and fourth paths, respectively,

the first pump is positioned upstream of the first valve body and downstream of the third valve body,

the second pump is positioned upstream of the second valve body and downstream of the fourth valve body,

the first valve body switching a state that the heating medium discharged from the first pump flows in and a state that the heating medium discharged from the first pump does not flow in, with respect to the more than or equal to three of heating medium passing devices,

the second valve body switching a state that the heating medium discharged from the second pump flows in and a state that the heating medium discharged from the second pump does not flow in, with respect to the more than or equal to three of heating medium passing devices,

the third valve body switching a state that the heating medium flows to the first pump and a state that the heating medium does not flow to the first pump, with respect to the more than or equal to three of heating medium passing devices, and

the fourth valve body switching a state that the heating medium flows to the second pump and a state that the heating medium does not flow to the second pump, with respect to the more than or equal to three of heating medium passing devices.

2. The vehicular heat management system according to claim 1 , the vehicular heat management system further comprising

a first-pump-side valve body chamber that houses the first valve body and the third valve body, and

a second-pump-side valve body chamber that houses the second valve body and the fourth valve body, wherein

the first-pump-side valve body chamber and the second-pump-side valve body chamber are formed separately from each other.

3. The vehicular heat management system according to claim 1 , wherein

the switching section is constructed of one switching valve that houses the first valve body, the second valve body, the third valve body, and the fourth valve body.

4. The vehicular heat management system according to claim 1 , wherein

two valve bodies of the first valve body, the second valve body, the third valve body, and the fourth valve body are mechanically coupled to each other.

5. The vehicular heat management system according to claim 4 , wherein

remaining two of the first valve body, the second valve body, the third valve body, and the fourth valve body are mechanically coupled to each other.

6. The vehicular heat management system according to claim 1 , wherein

the first valve body and the third valve body are mechanically coupled to each other.

7. The vehicular heat management system according to claim 6 , wherein

the second valve body and the fourth valve body are mechanically coupled to each other.

8. The vehicular heat management system according to claim 1 , wherein

the first valve body and the second valve body are mechanically coupled to each other.

9. The vehicular heat management system according to claim 8 , wherein

the third valve body and the fourth valve body are mechanically coupled to each other.

10. The vehicular heat management system according to claim 1 , wherein

the first valve body and the fourth valve body are mechanically coupled to each other.

11. The vehicular heat management system according to claim 10 , wherein

the second valve body and the third valve body are mechanically coupled to each other.

12. A vehicular heat management system comprising:

a first pump and a second pump drawing and discharging a heating medium;

more than three of heating medium passing devices in which the heating medium flows; and

a switching section switching a flow of the heating medium with respect to the more than three of heating medium passing devices, wherein

the switching section has a first valve body, a second valve body, a third valve body, and a fourth valve body,

a first one of the more than three of heating medium passing devices is positioned downstream of the first valve body and is fluidly connected to a discharging side of the first pump through the first valve body and to a suction side of the first pump without the first to fourth valve bodies,

a second one of the more than three of heating medium passing devices is positioned downstream of the second valve body and is fluidly connected to a discharging side of the second pump through the second valve body and to a suction side of the second pump without the first to fourth valve bodies,

remaining ones of the more than three of heating medium passing devices are positioned downstream of the first and second valve bodies and upstream of the third and fourth valve bodies and are fluidly connected to the discharging side of the first pump through the first valve body, to the suction side of the first pump through the third valve body, to the discharging side of the second pump through the second valve body, and to the suction side of the second pump through the fourth valve body,

the first valve body switching a state that the heating medium discharged from the first pump flows in and a state that the heating medium discharged from the first pump does not flow in, with respect to the first one and the remaining ones of the more than three of heating medium passing devices,

the second valve body switching a state that the heating medium discharged from the second pump flows in and a state that the heating medium discharged from the second pump does not flow in, with respect to the second one and the remaining ones of the more than three of heating medium passing devices,

the third valve body switching a state that the heating medium flows to the first pump and a state that the heating medium does not flow to the first pump, with respect to the remaining ones of the more than three of heating medium passing devices, and

the fourth valve body switching a state that the heating medium flows to the second pump and a state that the heating medium does not flow to the second pump, with respect to the remaining ones of the more than three of heating medium passing devices.

13. A vehicular heat management system comprising:

a first pump and a second pump drawing and discharging a heating medium;

more than three of heating medium passing devices in which the heating medium flows; and

a switching section switching a flow of the heating medium with respect to the more than three of heating medium passing devices, wherein

the switching section has a first valve body, a second valve body, a third valve body, and a fourth valve body,

a first one of the more than three of heating medium passing devices is positioned upstream of the third valve body and is fluidly connected to a suction side of the first pump through the third valve body and to a discharging side of the first pump without the first to fourth valve bodies,

a second one of the more than three of heating medium passing devices is positioned upstream of the fourth valve body and is fluidly connected to a suction side of the second pump through the fourth valve body and to a discharging side of the second pump without the first to fourth valve bodies,

remaining ones of the more than three of heating medium passing devices are positioned downstream of the first and second valve bodies and upstream of the third and fourth valve bodies and are fluidly connected to the discharging side of the first pump through the first valve body, to the suction side of the first pump through the third valve body, to the discharging side of the second pump through the second valve body, and to the suction side of the second pump through the fourth valve body,

the first valve body switching a state that the heating medium discharged from the first pump flows in and a state that the heating medium discharged from the first pump does not flow in, with respect to the remaining ones of the more than three of heating medium passing devices,

the second valve body switching a state that the heating medium discharged from the second pump flows in and a state that the heating medium discharged from the second pump does not flow in, with respect to the remaining ones of the more than three of heating medium passing devices,

the third valve body switching a state that the heating medium flows to the first pump and a state that the heating medium does not flow to the first pump, with respect to the first one and the remaining ones of the more than three of heating medium passing devices, and

the fourth valve body switching a state that the heating medium flows to the second pump and a state that the heating medium does not flow to the second pump, with respect to the second one and the remaining ones of the more than three of heating medium passing devices.

14. A vehicular heat management system comprising:

a first pump and a second pump drawing and discharging a heating medium;

more than or equal to three of heating medium passing devices in which the heating medium flows; and

a switching section switching a flow of the heating medium with respect to the more than or equal to three of heating medium passing devices, wherein

the switching section has a first valve body, a second valve body, a third valve body, and a fourth valve body,

at least two of the more than or equal to three of heating medium passing devices are positioned downstream of the first and second valve bodies and are directly connected to the first and second valve bodies through first and second paths, respectively, and are directly connected to the third and fourth valve bodies at a position upstream of the third and fourth valve bodies through third and fourth paths, respectively,

one of the more than or equal to three of heating medium passing devices is positioned downstream of the first and second valve bodies and is directly connected to the first and second valve bodies through the first and second paths, respectively, to a discharging side of the first pump through the first valve body and the first path, to a suction side of the first pump through a fifth path, to a discharging side of the second pump through the second valve body and the second path, and to a suction side of the second pump through the fifth path,

the first valve body switching a state that the heating medium discharged from the first pump flows in and a state that the heating medium discharged from the first pump does not flow in, with respect to the more than or equal to three of heating medium passing devices,

the second valve body switching a state that the heating medium discharged from the second pump flows in and a state that the heating medium discharged from the second pump does not flow in, with respect to the more than or equal to three of heating medium passing devices,

the third valve body switching a state that the heating medium flows to the first pump and a state that the heating medium does not flow to the first pump, with respect to remaining ones of the more than or equal to three of heating medium passing devices, and

the fourth valve body switching a state that the heating medium flows to the second pump and a state that the heating medium does not flow to the second pump, with respect to the remaining ones of the more than or equal to three of heating medium passing devices.