KR-20260063491-A - VEHICLE HEATING VENTILATION AND AIR CONDITIONING SYSTEM

KR20260063491AKR 20260063491 AKR20260063491 AKR 20260063491AKR-20260063491-A

Abstract

The present invention relates to a heating and cooling system for a vehicle, wherein a heating and cooling system according to one embodiment of the present invention comprises: a water-cooled condenser into which coolant discharged from the coolant outlet of an electrical unit and a battery flows; a multi-valve into which coolant discharged from the outlet of the water-cooled condenser flows and which selectively flows the introduced coolant to the inlet of the electrical unit and the battery; a chiller into which coolant discharged from the coolant outlet of the electrical unit and the battery flows and in which the coolant outlet is fluidly connected to the inlet of the multi-valve; and a control unit that receives the load of the electrical unit, the load of the battery, and the indoor temperature of the vehicle and controls the multi-valve.

Inventors

김종원
한대규

Assignees

현대자동차주식회사
기아 주식회사

Dates

Publication Date: 20260507
Application Date: 20241030

Claims (19)

A water-cooled condenser into which coolant discharged from the coolant outlet of the electrical unit and battery flows; A multi-valve into which cooling water discharged from the outlet of the above-mentioned water-cooled condenser flows, and which selectively flows the incoming cooling water to the inlet of the above-mentioned electrical unit and the above-mentioned battery; A chiller into which coolant discharged from the coolant outlet of the above electrical unit and the above battery flows, and in which the coolant outlet is fluidly connected to the inlet of the above multi-valve; and A vehicle heating and cooling system comprising: a control unit that controls the multi-valve by receiving the load of the above electrical unit, the load of the above battery, and the interior temperature of the vehicle.
In Article 1, A first bypass path connecting from the outlet of the multi-valve to the coolant outlet of the electrical unit; A first 3-way valve connected to the first bypass path and into which cooling water discharged from the outlet of the multi-valve flows; A second 3-way valve into which coolant discharged from the first 3-way valve or the coolant outlet of the electrical unit flows; A radiator into which coolant passing through the above-mentioned second 3-way valve is selectively introduced; A reserve tank into which coolant discharged from the above radiator flows, and whose outlet is fluidly connected to the inlet of the above multi-valve; A second bypass path connected between the outlet of the above-mentioned water-cooled condenser and the inlet of the above-mentioned radiator; A first cooling water pump that pumps cooling water from the multi-valve outlet to the first 3-way valve; and A second coolant pump that pumps coolant from the multi-valve outlet to the coolant inlet of the battery; comprising, A vehicle heating and cooling system in which the coolant discharged from the above water-cooled condenser selectively flows to the radiator through the above second bypass path.
In Paragraph 2, The above control unit is, The cooling water discharged from the multi-valve outlet through the first 3-way valve is selectively flowed into the inlet of the electrical unit or the first bypass path, and A vehicle heating and cooling system that selectively flows coolant introduced into the inlet of the second 3-way valve through the second 3-way valve to the inlet of the water-cooled condenser or to the radiator.
In Paragraph 3, A vehicle heating and cooling system comprising: a refrigerant path constituting a circulation path passing through the water-cooled condenser and the chiller, wherein the refrigerant discharged from the indoor condenser.
In Paragraph 4, The above refrigerant path is, A vehicle heating and cooling system in which refrigerant discharged from the refrigerant outlet of the above-mentioned water-cooled condenser flows into the evaporator inlet side, and the refrigerant passing through the above-mentioned evaporator and the above-mentioned chiller is combined at the front end of the indoor condenser inlet and flows into the indoor condenser inlet.
In Paragraph 5, A first expansion valve located upstream of the water-cooled condenser for refrigerant; A second expansion valve located upstream of the chiller for refrigerant; and A vehicle heating and cooling system comprising: a third expansion valve located upstream of the evaporator for refrigerant.
In Paragraph 6, A heating and cooling system for a vehicle, wherein the control unit controls the opening of the first expansion valve, the opening of the second expansion valve, and the opening of the third expansion valve in response to the load of the electrical unit, the load of the battery, and the indoor temperature of the vehicle, and controls the first 3-way valve or the second 3-way valve.
In Article 7, The above control unit When the load of the above electrical unit exceeds the first set load, the load of the above battery is less than or equal to the second set load, and the above indoor temperature is less than or equal to the first set temperature, A vehicle heating and cooling system that controls the multi-valve and the first 3-way valve so that coolant flows through the multi-valve, the battery, and the water-cooled condenser, and coolant flows through the multi-valve, the electrical unit, and the chiller.
In Paragraph 8, The above control unit is, The opening of the first expansion valve is controlled so that the refrigerant passing through the first expansion valve maintains a pressure state, and A vehicle heating and cooling system that controls the opening of a second expansion valve and a third expansion valve so that the refrigerant is throttled before flowing into the evaporator and the chiller.
In Article 7, The above control unit is, When the load of the above electrical unit exceeds a first set load, the load of the above battery exceeds a second set load, and the indoor temperature is below the first set temperature, A vehicle heating and cooling system that controls the multi-valve and the first 3-way valve so that coolant flows through the multi-valve, the battery, and the water-cooled condenser, and coolant flows through the multi-valve, the electrical unit, and the chiller.
In Article 10, The above control unit is, A vehicle heating and cooling system that controls the opening of a first expansion valve and a third expansion valve so that the refrigerant is throttled before entering the water-cooled condenser and the evaporator, and controls the opening of the second expansion valve so that the refrigerant passing through the second expansion valve maintains a pressure state.
In Article 7, The above control unit is, When the load of the above electrical unit exceeds the first set load, the load of the above battery exceeds the second set load, and the indoor temperature exceeds the second set temperature, Coolant flows through the multi-valve, the electrical unit, the water-cooled condenser, and the radiator, and A vehicle heating and cooling system that controls the multi-valve, the first 3-way valve, and the second 3-way valve so that coolant flows through the multi-valve, the battery, and the chiller.
In Paragraph 12, The above control unit is, The opening of the first expansion valve is controlled so that the refrigerant passing through the first expansion valve maintains a pressure state, and A vehicle heating and cooling system that controls the opening of a second expansion valve and a third expansion valve so that the refrigerant is throttled before flowing into the evaporator and the chiller.
In Article 7, The above control unit is, When the load of the above electrical unit is less than the first set load, the load of the above battery exceeds the second set load, and the above indoor temperature exceeds the second set temperature, Coolant flows through the multi-valve, the water-cooled condenser, and the radiator, and A vehicle heating and cooling system that controls the multi-valve, the first 3-way valve, and the second 3-way valve so that coolant flows through the multi-valve, the battery, and the chiller.
In Paragraph 14, The above control unit is, The opening of the first expansion valve is controlled so that the refrigerant passing through the first expansion valve maintains a pressure state, and A vehicle heating and cooling system that controls the opening of a second expansion valve and a third expansion valve so that the refrigerant is throttled before flowing into the evaporator and the chiller.
In Article 7, The above control unit is, If the load of the above electrical unit exceeds a first set load, the load of the battery is less than a second set load, and the indoor temperature exceeds a first set temperature and is less than a second set temperature, A vehicle heating and cooling system that controls the multi-valve, the first 3-way valve, and the second 3-way valve so that coolant flows through the multi-valve, the electrical unit, and the radiator.
In Article 7, The above control unit is, If the load of the above electrical unit exceeds a first set load, the load of the above battery exceeds a second set load, and the indoor temperature exceeds a first set temperature and is below a second set temperature, Coolant flows through the multi-valve, the electrical unit, and the radiator, and So that the coolant flows through the multi-valve, the battery, and the water-cooled condenser. A vehicle heating and cooling system controlling the above multi-valve, the above first 3-way valve, and the above second 3-way valve.
In Paragraph 16, The above control unit is, A vehicle heating and cooling system that controls the opening of the first expansion valve, the opening of the second expansion valve, and the opening of the third expansion valve in a direction in which the first expansion valve, the second expansion valve, and the third expansion valve are all closed.
In Paragraph 17, The above control unit is, A vehicle heating and cooling system that controls the opening of the first expansion valve, the opening of the second expansion valve, and the opening of the third expansion valve in a direction in which the first expansion valve, the second expansion valve, and the third expansion valve are all closed.

Description

Vehicle Heating, Ventilation, and Air Conditioning System The present invention relates to a vehicle heating and cooling system, and more specifically, to a vehicle heating and cooling system that utilizes the heat source of an electrical unit and a battery by having the coolant absorb or dissipate heat according to the heating and cooling load and the load of the electrical unit through a water-cooled condenser. The electrical units, battery cooling systems, and heating and cooling systems of typical electric vehicles play a crucial role in the efficient and stable operation of the vehicle. Electric vehicles are powered by electrical units (e.g., power converters, motor control units) and high-voltage batteries, and since these components generate heat, an effective cooling system is required. In conventional cooling systems, the electrical unit and battery are cooled by independent cooling systems. In the case of the electrical unit, cooling is achieved by using a water-cooling system to absorb heat and release it to the outside. Furthermore, conventional battery cooling systems primarily utilize air and water cooling. Air-cooled systems achieve cooling by circulating air between battery modules to dissipate heat. In contrast, water-cooled systems effectively remove heat by circulating coolant between battery modules. In both systems, coolant or air is cooled through heat exchange with external air via radiators. Furthermore, conventional heating and cooling systems utilize HVAC (Heating, Ventilation, and Air Conditioning) systems to maintain a comfortable interior temperature; this system keeps the cabin cool by circulating refrigerant to release heat to the outside. In the case of heating systems, unlike internal combustion engine vehicles, electric vehicles cannot utilize engine waste heat, so they provide heating using PTC (Positive Temperature Coefficient) heaters. PTC heaters keep the cabin warm by directly converting electricity into heat. However, conventional heating and cooling systems have the problem of consuming a lot of electricity and having poor energy efficiency because they require PTC heaters for heating. In addition, energy efficiency is reduced because they cannot effectively utilize heat sources generated from electrical units and batteries. To address these issues, active research is being conducted on varying the flow direction of the cooling water circulation and the configuration of the refrigerant heat exchange depending on the electrical unit and battery load. Figure 1 illustrates a circuit diagram of a heating and cooling system as an embodiment of the present invention. FIG. 2 illustrates a circuit diagram of a heating and cooling system as an embodiment of the present invention, when indoor heating, cooling of the electrical unit, and heating of the battery are required. FIG. 3 illustrates a circuit diagram of a heating and cooling system in the case where indoor heating, electrical unit, and battery cooling are required, as an embodiment of the present invention. FIG. 4 illustrates a circuit diagram of a heating and cooling system in the case where indoor cooling, electrical unit cooling, and battery cooling are required, as an embodiment of the present invention. FIG. 5 illustrates a circuit diagram of a heating and cooling system in the case where cooling of the battery and indoor cooling are required during rapid charging, as an embodiment of the present invention. FIG. 6 illustrates a circuit diagram of a heating and cooling system in which only the electrical unit requires cooling, as an embodiment of the present invention. Figure 7 shows a circuit diagram of a heating and cooling system when cooling of the electrical unit and battery is required. Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be interpreted as being limited to the embodiments below. These embodiments are provided to more completely explain the present invention to those with average knowledge in the art. Additionally, terms such as "...part," "...unit," etc., as described in the specification refer to a unit that processes at least two functions or operations, and this may be implemented in hardware, software, or a combination of hardware and software. Furthermore, the terms used in the specification are used merely to describe specific embodiments and are not intended to limit the embodiments. Singular expressions include plural expressions unless the context clearly indicates otherwise. Furthermore, throughout the specification, when a part is described as "including" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components; additionally, terms such as "?? part" as described in the specification refer to a un