KR20130026872A - Heat pump system for vehicle - Google Patents
Heat pump system for vehicle Download PDFInfo
- Publication number
- KR20130026872A KR20130026872A KR1020110090311A KR20110090311A KR20130026872A KR 20130026872 A KR20130026872 A KR 20130026872A KR 1020110090311 A KR1020110090311 A KR 1020110090311A KR 20110090311 A KR20110090311 A KR 20110090311A KR 20130026872 A KR20130026872 A KR 20130026872A
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- Prior art keywords
- cooling
- water
- refrigerant
- vehicle
- valve
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/32—Cooling devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B27/00—Machines, plants or systems, using particular sources of energy
- F25B27/02—Machines, plants or systems, using particular sources of energy using waste heat, e.g. from internal-combustion engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02731—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one three-way valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2327/00—Refrigeration system using an engine for driving a compressor
- F25B2327/001—Refrigeration system using an engine for driving a compressor of the internal combustion type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/04—Refrigeration circuit bypassing means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2507—Flow-diverting valves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
- Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
Abstract
A vehicular heat pump system and a control method thereof are disclosed. Vehicle heat pump system according to an embodiment of the present invention is configured in the vehicle cooling means for supplying and circulating the cooling water to the vehicle driving motor and electrical equipment through the cooling line, and the air conditioner connected to the refrigerant line to control the heating and cooling of the vehicle interior In the vehicle heat pump system comprising a means, the cooling means is configured in the vehicle at least one or more water pump to circulate the cooling water along the cooling line and at least one or more to cool the supplied cooling water through heat exchange with the outside air And a radiator and a cooling fan for blowing air to the radiator. The cooling water is circulated in connection with the cooling line, and selectively uses waste heat sources generated from the electronic device according to heating, cooling, and dehumidification modes of the vehicle. Changing the water temperature of the cooling water, and the refrigerant line of the It further comprises a water cooling condenser connected to heat exchange with the cooling water introduced refrigerant.
Description
The present invention relates to a vehicle heat pump system and a control method thereof, and more particularly, to improve heating performance and dehumidification performance by using waste heat generated from electrical components, and to increase the overall mileage of a vehicle by the same power. A heat pump system and a control method thereof.
In general, a vehicle air conditioner includes an air conditioner module for heating and cooling an interior of a vehicle.
In this air conditioner module, the heat exchanging medium discharged by the compressor is circulated to the compressor through the condenser, the receiver dryer, the expansion valve, and the evaporator, the room is cooled by the heat exchange by the evaporator or the cooling water is introduced into the heater And the indoor is heated by heat exchange.
Meanwhile, as interest in energy efficiency and environmental pollution has increased recently, development of eco-friendly vehicles that can substantially replace internal combustion engine cars has been required. Such eco-friendly vehicles are usually electric vehicles driven by fuel cells or electricity. B) it is divided into a hybrid vehicle driven by an engine and an electric battery.
Among such eco-friendly vehicles, electric heaters do not use a separate heater unlike an air conditioner of a general vehicle, and an air conditioner applied to an electric vehicle is commonly referred to as a heat pump system.
In the summer cooling mode, the heat pump system condenses the high-temperature and high-pressure gaseous refrigerant compressed by the compressor through the condenser, and then evaporates in the evaporator through the receiver drier and the expansion valve to reduce the temperature and humidity of the room. But it uses a high temperature and high pressure gaseous refrigerant as a heater medium in winter heating mode.
That is, in the heating mode of the electric vehicle, the high-temperature and high-pressure gaseous refrigerant flows through the valve to the indoor condenser, not through the outdoor condenser, and exchanges heat with the sucked outdoor air. The heat exchanged outdoor air passes through a PTC (Positive Temperature Coefficient) The temperature of the vehicle interior is increased.
The gaseous refrigerant of high temperature and high pressure introduced into the indoor condenser is condensed through heat exchange with the sucked outside air and discharged to the liquid refrigerant again.
However, in the conventional heat pump system as described above, the air-cooling type that uses outside air as a heat exchange medium with the refrigerant is applied, and the structure of the heat exchangers including the compressor and the respective components becomes complicated, have.
In addition, as the refrigerant exchanges heat with outdoor air in the extreme low or low temperature in winter, the refrigerant is discharged from the indoor condenser to the ultra-low temperature state and flows into the external condenser. As a result, surface condensation occurs in the external condenser, When switching from the cooling mode to the heating mode, the humidity is increased by the condensed water remaining in the outside of the evaporator, and the humidity of the vehicle is increased.
In order to prevent this, in the defrost mode in which the surface of the outer condenser is removed, the operation of the compressor is stopped and heating is performed only with the PTC heater. As a result, the heating performance is extremely lowered. There is a problem that the traveling distance is shortened.
Further, when the liquid refrigerant from the indoor condenser is sucked into the compressor, there is a lack of a heat source capable of switching to the gaseous refrigerant, so that the compression efficiency is lowered. When the outside air temperature is low, the heating performance is remarkably insufficient and the system is unstable In addition, when the liquid refrigerant flows into the compressor, the durability of the compressor is deteriorated.
In addition, in a separate dehumidification mode for moisture removal in the vehicle interior, noise and vibration are generated due to frequent opening and closing operations of the 2-way valve.
Embodiments of the present invention by exchanging the cooling water and the refrigerant using the waste heat source generated in the electrical equipment, improve the heating performance and efficiency and dehumidification performance, and reduce the heating load that can occur in the heating mode of the vehicle, the same power To provide a vehicle heat pump system and a control method for increasing the overall mileage of the vehicle.
According to an embodiment of the present invention, a vehicle heat including a cooling means configured to supply and circulate a cooling water to a vehicle driving motor and electrical equipment through a cooling line, and an air conditioning means connected to a refrigerant line to control cooling and heating of the vehicle interior. In the pump system, the cooling means is configured in a vehicle to circulate the cooling water along the cooling line through at least one or more water pump, and at least one radiator for cooling the supplied cooling water through heat exchange with the outside air, and the radiator It includes a cooling fan for blowing the wind, the cooling water is circulated in connection with the cooling line, and selectively changes the water temperature of the cooling water by using the waste heat source generated from the electrical appliance according to the heating, cooling, and dehumidification mode of the vehicle Cooling the introduced refrigerant connected to the refrigerant line of the air conditioning means A vehicle heat pump system further including a water cooling condenser for exchanging heat with angle water may be provided.
The cooling means includes a first radiator connected through a first water pump and a first cooling line for supplying and circulating cooling water to the water cooling capacitor; A second radiator connected through a second water pump and a second cooling line to supply and circulate the cooling water to the electronic device and the water cooling capacitor; And at least one valve installed on each cooling line between the electronic device and the water cooling capacitor.
The valve is installed at a position where the first and second cooling lines connected to the first and second radiators are branched, respectively, to selectively supply the cooling water discharged from the water cooling condenser to the first and second radiators. valve; A second valve installed on the second refrigerant line between the second radiator and the first valve to allow the cooling water to flow into the second radiator or to bypass the second water pump directly; And a third valve installed on the first and second cooling lines between the electronic device and the water cooling capacitor.
The cooling means may further include a bypass line connected to the second cooling line between the first valve and the second valve to bypass the cooling water to the electronic device.
The bypass line may be equipped with a fourth valve for selectively supplying the cooling water passing through the water cooling capacitor to the electronic device according to the mode of the vehicle.
The first, second, and third valves may be configured as 3-way valves.
The air conditioning unit includes an HVAC module having an opening / closing door therein to selectively adjust the outside air passing through the evaporator to the internal condenser and the PCT heater according to the heating, cooling, and dehumidifying modes of the vehicle; A compressor connected to the evaporator through a refrigerant line and compressing refrigerant in a gaseous state; An accumulator provided on a refrigerant line between the compressor and the evaporator and supplying only gas refrigerant to the compressor; A first refrigerant valve selectively supplying the refrigerant discharged from the compressor to the internal condenser according to the mode of the vehicle; A first expansion valve for receiving and expanding the refrigerant passing through the internal condenser; A second refrigerant valve which is expanded through the first expansion valve and supplies the heat exchanged refrigerant to the evaporator or to the accumulator while passing through the water cooling capacitor; And a second expansion valve disposed between the evaporator and the second refrigerant valve and expanding the refrigerant introduced through the opening and closing of the second refrigerant valve.
A pressure sensor may be mounted on the refrigerant line connecting the compressor and the first refrigerant valve.
The first and second refrigerant valves may be configured as 3-way valves.
The cooling means and the air conditioner means are respectively connected to a controller and can be operated by a control signal of the controller.
And the vehicle heat pump system control method according to an embodiment of the present invention having the configuration as described above is connected to the controller, and are interconnected through the first and second cooling lines, respectively, the first, second radiator, first And a second water pump, and cooling means including a plurality of valves and electrical equipment, respectively, interconnected through a refrigerant line, a plurality of refrigerant valves and expansion valves, compressors, accumulators, evaporators, and external condensers, internal condensers, A heat pump system comprising a PTC heater and an HVAC module including an HVAC module configured as an opening / closing door, and further comprising a water cooling condenser connected to each of the cooling lines and the refrigerant lines, according to a user's selection. And a method for controlling a vehicle heat pump system for operating in a cooling mode and a cooling mode, respectively. Determine the temperature and the temperature of the coolant passing through the electrical equipment, and the state of the vehicle to selectively supply the coolant to the water cooling capacitor through the first and second cooling lines through the selective operation of each valve, the refrigerant line The temperature of the refrigerant is controlled by heat-exchanging the refrigerant introduced into the water-cooled condenser and the cooling water, and the air-conditioning means supplies the refrigerant whose temperature has risen through heat-exchange with the cooling water in the water-cooling capacitor through the opening of the second refrigerant valve. Passed through the accumulator and the compressor along a line and compressed into a gas refrigerant of high temperature and high pressure, the first refrigerant valve is supplied to the internal condenser of the HVAC module, and the refrigerant passing through the internal condenser is In an expanded state through an expansion valve, it is supplied to the water-cooled condenser and circulated, and passes through the evaporator of the HVAC module from the outside. Group and opening the opening and closing door to pass through the internal condenser, it is possible, while the inlet air is passed through the internal condenser to heat the vehicle cabin with the selective operation of the PTC heater.
The heating mode is divided into first, second, third, fourth, and fifth heating modes according to the temperature of the outside air, the initial driving state of the vehicle, and the low-temperature driving state of the vehicle, thereby opening and closing each valve of the cooling means. The control allows adjustment of the flow of coolant.
In the first heating mode, the cooling means is operated such that the first, second, and third valves circulate the cooling water through the second cooling line when the outside temperature is below zero, and the second radiator and the second cooling pump are operated. Through the electrical equipment along the second cooling line through the waste heat source generated from the electrical equipment can be introduced into the water cooling condenser in a state in which the temperature of the cooling water is raised.
In the second heating mode, the cooling means is operated so that the first valve and the third valve circulate the cooling water through the first cooling line when the outside air temperature is an image and when the temperature of the electronic device is low so that cooling is not necessary. The cooling water exchanged with the outside heat source while passing through the first radiator may be introduced into the water cooling capacitor through the operation of the first water pump.
In the third heating mode, when the cooling means needs to simultaneously use an external heat source and a waste heat source generated from the electrical equipment, the first, second and third valves respectively circulate the cooling water through the first and second cooling lines. The cooling water exchanged with the external heat source while passing through the first radiator through the operation of the first water pump, and the coolant passing through the second radiator and the electrical appliance through the operation of the second water pump, the water cooling condenser. Can be introduced into.
In the fourth heating mode, the cooling means is configured to close all of the first, second, and third valves when the vehicle is in an initial state in which the external temperature is extremely low, and the operation of the first and second water pumps is stopped. It is stopped to prevent the inflow of the coolant into the water cooling capacitor by not circulating the coolant through the first and second cooling lines.
In the fifth heating mode, the cooling means, when the vehicle is in a low temperature driving state, the first and third valves are operated, and the coolant is circulated along the second cooling line through the operation of the second water pump. Cooling water whose temperature is increased through heat exchange with the waste heat source of the electronic device may be introduced into the water cooling condenser while preventing the cooling water from flowing into the second radiator through the operation of the two valves.
In the dehumidification mode, the cooling means operates a cooling fan by the controller to cool the cooling water introduced into the second radiator along the second cooling line together with the outside air, and cools the electrical equipment through the operation of the second water pump. While lowering the temperature of the refrigerant through heat exchange with the cooling water introduced into the water cooling condenser, and the air conditioner unit is connected to the evaporator of the HVAC module by cooling the low temperature refrigerant passing through the water cooling condenser. The second refrigerant valve is opened to be introduced into the expansion valve, the expanded refrigerant is supplied to the evaporator, and the evaporated refrigerant is discharged through heat exchange with outside air from the evaporator, and is compressed while passing through the accumulator and the compressor. By opening the refrigerant line connected to the internal condenser through the operation of the first refrigerant valve The refrigerant is supplied to the accumulator, and the refrigerant having passed through the internal condenser is expanded through the first expansion valve, and is supplied to the water cooling capacitor to circulate. The external air cooled while passing through the evaporator of the HVAC module is externally provided. The opening and closing door may be opened to pass through the internal condenser, and the introduced outside air may dehumidify the vehicle interior while passing through the internal condenser and the PTC heater.
The cooling mode is divided into first and second cooling modes according to a general driving state and an initial starting driving state of the vehicle, thereby controlling the flow of cooling water through opening and closing control of each valve of the cooling means.
In the first cooling mode, the cooling means is operated to circulate cooling water through the first cooling line when the first and third valves are in a condition of a general driving state of the vehicle, and through the operation of the first water pump. Cooling water exchanged with outside air while passing through a first radiator is introduced into the water cooling capacitor, and the temperature of the refrigerant is controlled by heat-exchanging the coolant and the coolant introduced into the water cooling capacitor through the coolant line, and the air conditioner means controls the water cooling capacitor. The second refrigerant valve is operated to operate the second refrigerant valve to flow into the second expansion valve connected to the evaporator of the HVAC module while passing through the gas, and supply the expanded refrigerant to the evaporator, and evaporate through heat exchange with the outside air in the evaporator. Discharged the refrigerant to be compressed while passing through the accumulator and the compressor, and through the operation of the first refrigerant valve, Open and circulate the refrigerant line connected to the denser, and close the opening and closing door so that the outside air cooled while passing through the evaporator by the refrigerant introduced into the evaporator does not flow into the internal condenser, thereby directly cooling the outside air into the inside of the vehicle. Can be cooled to cool the interior of the vehicle.
In the second cooling mode, the cooling means is configured to increase the flow rate of the coolant when the vehicle is in the condition of the initial starting operation of the vehicle, and the first, second, and third valves respectively provide cooling water through the first and second cooling lines. Cooled water that is circulated and passed through the first radiator through the operation of the first water pump and heat exchanged with the outside air, and the coolant passing through the second radiator and the electrical equipment through the operation of the second water pump the water cooling condenser The temperature of the refrigerant may be controlled by heat-exchanging the refrigerant and the cooling water introduced into the water cooling capacitor through the refrigerant line.
The electrical load of the electronic device is very large, and if abnormal heat is generated in the electronic device, the electronic device further includes an electronic device cooling mode for cooling the electronic device. In the electronic device cooling mode, the cooling means operates the first, second, and third valves. Cooling water circulated along the first and second cooling lines through the inlet is supplied to the electronic device, and through the first radiator through the first radiator, the coolant is heat-exchanged with the outside air, and the second water pump By passing through the second radiator through the operation of the cooling water cooled by the cooling fan flows into the electrical equipment, the bypass line for connecting the second cooling line provided between the electrical equipment and the first, second valve and Cooling water is circulated through the operation of the fourth valve provided on the bypass line to cool the electronic device.
The heating mode, the dehumidification mode, the cooling mode, and the electronic device cooling mode may include the air flow rate of the cooling fan and the first and the first, the controller according to the temperature state of the waste heat source generated from the electronic device, and the temperature state of the cooling water and the refrigerant. 2 The flow rate of the water pump can be controlled.
As described above, according to the vehicle heat pump system and the control method according to the embodiment of the present invention, by applying a water-cooling capacitor using the cooling water as the heat exchange medium, by heat exchange with the refrigerant using a waste heat source generated in the electrical equipment, the overall heating It can improve the performance, efficiency and dehumidification performance, and can prevent the external condensation of the internal condenser by the introduced external air at cryogenic temperature.
In addition, in the heating mode and the cryogenic idle state and driving conditions, the entire system is operated simultaneously with the PTC heater to prevent an increase in power usage, while reducing the heating load to increase the overall mileage of the vehicle with the same power. It has the advantage of letting.
In addition, in the cooling mode of the vehicle, the cooling water is exchanged with the low temperature refrigerant to lower the water temperature, thereby improving cooling performance.In the dehumidification mode, the 3-way valve reduces frequent opening and closing operations, thereby generating noise and vibration. Can be reduced.
In addition, by using the cooling water as the heat exchange medium in the water cooling condenser, the structure of each component can be simplified, thereby reducing the overall system package and improving the efficiency of each radiator connected through different cooling lines.
1 is a block diagram of a vehicle heat pump system according to an exemplary embodiment of the present invention.
2 is a first heating mode operation state diagram of a vehicle heat pump system according to an embodiment of the present invention.
3 is a second heating mode operation state diagram of a vehicle heat pump system according to an embodiment of the present invention.
4 is a third heating mode operation state diagram of a vehicle heat pump system according to an embodiment of the present invention.
5 is a fourth heating mode operation state diagram of a vehicle heat pump system according to an embodiment of the present invention.
6 is a fifth heating mode operation state diagram of a vehicle heat pump system according to an embodiment of the present invention.
7 is a state diagram of the dehumidification mode operation of the vehicle heat pump system according to an embodiment of the present invention.
8 is a diagram illustrating a first cooling mode operating state of a vehicle heat pump system according to an exemplary embodiment of the present invention.
9 is a second cooling mode operating state diagram of a vehicle heat pump system according to an embodiment of the present invention.
10 is a state diagram of the electronic device cooling mode operation of the vehicle heat pump system according to an embodiment of the present invention.
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory only and are not restrictive of the invention, It should be understood that various equivalents and modifications may be present.
1 is a block diagram of a vehicle heat pump system according to an embodiment of the present invention.
Referring to the drawings, the vehicle
To this end, the vehicle
The
The
That is, the water-cooled
The water-cooled
In the present embodiment, the cooling means 110 is configured on the front of the vehicle to circulate the cooling water along the cooling line (CL) through at least one or
Here, the cooling means 110 is configured to include the first and
First, the
In the present embodiment, the
And each valve is composed of at least one, and is installed on each of the cooling lines (C.L1, C.L2) between the
Here, the valve is composed of the first, second, and third valves (119, 121, 123), which will be described in more detail below.
First, the
In the present embodiment, the
The
Here, the first, second, and
The cooling means 110 configured as described above is connected to the second cooling line C.L2 between the
The
Here, the
That is, the
Accordingly, the
The
First, the
That is, the opening /
In the present embodiment, the
The
In the present embodiment, the first
The
Here, a
The second
The
Here, the first
The cooling means 110 and the air conditioning means 150 having the above-described configuration are connected to the
That is, the
In addition, the
Hereinafter, an operation and a control method of a vehicle heater pump system according to an exemplary embodiment of the present invention configured as described above will be described in detail with reference to FIGS. 2 to 10.
2 to 6 are each heating mode operation state diagram of the vehicle heat pump system according to an embodiment of the present invention, Figure 7 is a dehumidification mode operation state diagram of the vehicle heat pump system according to an embodiment of the present invention, Figure 8 to Figure 9 is a state diagram of each cooling mode operation state of the vehicle heat pump system according to an embodiment of the present invention, Figure 10 is a state diagram of the electrical equipment cooling mode operation state of the vehicle heat pump system according to an embodiment of the present invention.
Here, the heating mode, the dehumidification mode, and the cooling mode and the electrical appliance cooling mode of the
First, the operation and control method in the heating mode of the
Referring to the drawings, in the heating mode, the cooling means 110 determines the temperature of the coolant through which the
Here, the heating mode is divided into first, second, third, fourth, and fifth heating modes according to the temperature state of the outside air, the initial driving state of the vehicle, and the low temperature driving state of the vehicle. Through the opening and closing control of each valve (119, 121, 123) to control the flow of the cooling water.
In the present embodiment, the first heating mode is operated when the outside temperature is below zero, as shown in FIG.
In the first heating mode, the cooling means 110 is operated such that the first, second, and
Accordingly, the coolant passes through the
At this time, the cooling
In this state, the water-cooled
Here, the
That is, the cooling means 110 operated as described above can prevent the external condensation of the
In the first heating mode, the cooling water is supplied to the
In addition, the
Accordingly, the refrigerant passes through the
Here, the
The
The refrigerant having passed through the
Here, when the gas coolant of the high temperature and high pressure is supplied to the
Accordingly, when the outside air introduced from the outside passes through the
In the present embodiment, as shown in FIG. 3, the second heating mode is operated when the outside air temperature is an image and the temperature of the
In the second heating mode, the cooling means 110 is operated such that the
Accordingly, the coolant flows through the
At this time, the cooling
In this state, the water-cooled
Here, the
That is, the cooling means 110 operated as described above is an electrical equipment having a large overall system resistance instead of being supplied with a heat source required for heating from the outside air of the image in a condition where the outside temperature is a low temperature image and the cooling circuit operation of the
In addition, it is possible to prevent external accumulation of the
In addition, since the
In the present embodiment, as shown in FIG. 4, the third heating mode is operated when the external heat source and the waste heat source generated from the
In the third heating mode, the cooling means 110 includes first, second, and
Accordingly, the coolant is exchanged with the external heat source while passing through the
At this time, the cooling
In this state, the water-cooled
Here, the
That is, the cooling means 110 operated as described above circulates the cooling water using the
Accordingly, the water-cooled
In addition, the coolant whose temperature is increased through the outdoor heat source and the waste heat source is heat-exchanged with the refrigerant, and is supplied to the
In addition, since the
In the present embodiment, the fourth heating mode is operated when the external temperature is the initial state of vehicle operation in the cryogenic state, as shown in FIG. 5.
In the fourth heating mode, the cooling means 110 has all of the first, second, and
Accordingly, the
At this time, the cooling
In this state, the water-cooled
That is, in the fourth heating mode, the cooling means 110 is stopped because the circulation of the cooling water is prevented as described above, so that the heat source of the cooling water is not supplied, and the pressure and flow rate of the refrigerant are controlled to ensure heating performance.
In addition, the fourth heating mode prevents the temperature drop of the refrigerant by preventing heat exchange between the coolant having a low temperature and the refrigerant in a cryogenic state, thereby preventing external accumulation of the
In addition, since the
In the present embodiment, the fifth heating mode is operated when the vehicle is in a low temperature driving state, as shown in FIG. 6.
In the fifth heating mode, the cooling means 110 is operated such that the first and
Accordingly, the coolant is circulated along the second cooling line C. L2 through the operation of the
Here, the cooling water is prevented from flowing into the
At this time, the cooling
In this state, the water-cooled
Here, the
That is, the cooling means 110 operated as described above is introduced into the
Accordingly, the water-cooled
In the fifth heating mode, since the
On the other hand, in the present embodiment, the operation and control method in the dehumidification mode of the
First, the cooling means 110 in the dehumidification mode, as shown in FIG. 7, the cooling
In this state, the cooled cooling water is circulated along the second cooling line C.L2 through the operation of the
At this time, the
Here, the
In addition, the
Then, the low temperature refrigerant introduced into the second expansion valve 173 is expanded and is supplied to the
Then, the refrigerant is evaporated through heat exchange with the outside air in the
The compressed gas refrigerant is supplied to the
Here, the
The
The refrigerant passing through the
In this case, the
Here, the outside air flowing into the
At this time, the opening /
In the present embodiment, the operation and control method in the cooling mode of the
Referring to the drawings, the cooling mode is divided into first and second cooling modes according to the general driving state and the initial starting driving state of the vehicle, and the cooling water is controlled by controlling the
First, as shown in FIG. 8, the first cooling mode is operated when the vehicle is in a normal driving condition.
In the first cooling mode, the cooling means 110 is operated such that the first and
Accordingly, the coolant flows into the
Here, the
That is, the first cooling mode prevents the cooling water cooling the
Here, the
That is, the first cooling mode prevents deterioration of cooling performance due to an increase in cooling load when cooling the
In addition, the
The low-temperature refrigerant introduced into the
Thereafter, the refrigerant is evaporated through heat exchange with the outside air in the
The refrigerant compressed through the operation as described above is introduced into the
Here, the outside air flowing into the
At this time, the opening /
In the present embodiment, the second cooling mode is operated when the initial starting driving condition of the vehicle is as shown in FIG. 9.
In the second cooling mode, the cooling means 110 may include the first, second, and
Accordingly, the cooling water is cooled through heat exchange with the outside air while passing through the
Here, the cooling
The
That is, in the second cooling mode, the cooling water passing through the first and
Accordingly, the overall marketability of the vehicle is improved, and the temperature of the cooling water passing through the first and
In addition, since the
In the present embodiment, the heat pump system control method, as shown in Figure 10, when the cooling load of the
In the electrical appliance cooling mode, the cooling means 110 firstly operates the first, second, and
Accordingly, the coolant passes through the
Here, the cooling water is prevented from entering the
In this state, the cooling water that has completed the cooling of the
Then, the coolant is circulated along the first cooling line C. L1 so that a part of the coolant flows into the
That is, in the electronic device cooling mode, the cooling water passing through the
In this case, the
Meanwhile, in describing the method for controlling a vehicle heat pump system according to an exemplary embodiment of the present invention, the
Therefore, according to the vehicle
In addition, in an idle state and a driving condition at a very low temperature in the heating mode, the entire system is simultaneously driven together with the
In addition, in the cooling mode of the vehicle, the cooling water is exchanged with the low temperature refrigerant to lower the water temperature, thereby improving cooling performance.In the dehumidification mode, the 3-way valve reduces frequent opening and closing operations, thereby generating noise and vibration. Can be reduced.
In addition, by using the cooling water as the heat exchange medium in the
Meanwhile, in describing a vehicle heat pump system and a control method thereof according to an embodiment of the present invention, the first, second and
In addition, in describing a vehicle heat pump system and a method of controlling the same according to an embodiment of the present invention, the first and
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be understood that various modifications and changes may be made without departing from the scope of the appended claims.
110: cooling means 111: electrical equipment
113: water pump 115: radiator
117: cooling fan 119: first valve
121: second valve 123: third valve
130: water cooling condenser 150: air conditioning means
151: HVAC module 153: internal condenser
155
159: opening and closing door 161: compressor
163: accumulator 165: first refrigerant valve
167: first expansion valve 169: second refrigerant valve
171: second expansion valve 175: pressure sensor
180: controller CL 1: the first cooling line
CL 2: second cooling line RL: refrigerant line
Claims (24)
The cooling means is configured in a vehicle to circulate the cooling water along the cooling line through at least one or more water pumps, at least one radiator for cooling the supplied cooling water through heat exchange with the outside air, and cooling the air to the radiator Includes a fan,
The cooling water is circulated in connection with the cooling line, and selectively changes the water temperature of the cooling water by using waste heat sources generated from the electrical equipment according to heating, cooling, and dehumidification modes of the vehicle, and is connected to the refrigerant line of the air conditioner. And a water cooling condenser for exchanging the introduced refrigerant with cooling water.
The cooling means
A first radiator connected through a first water pump and a first cooling line to supply and circulate cooling water to the water cooling capacitor;
A second radiator connected through a second water pump and a second cooling line to supply and circulate the cooling water to the electronic device and the water cooling capacitor; And
At least one valve installed on each cooling line between the electronic device and the water cooling capacitor;
The heat pump system comprising:
The valve
A first valve installed at a position where the first and second cooling lines respectively connected to the first and second radiators are branched to selectively supply the cooling water discharged from the water cooling capacitor to the first and second radiators;
A second valve installed on the second refrigerant line between the second radiator and the first valve to allow the cooling water to flow into the second radiator or to bypass the second water pump directly; And
A third valve installed on the first and second cooling lines between the electronic device and the water cooling capacitor;
Vehicle heat pump system, characterized in that consisting of.
The cooling means
And a bypass line connected to the second cooling line between the first valve and the second valve to bypass the coolant to the electronic device.
The bypass line
And a fourth valve for selectively supplying the coolant passing through the water cooling condenser to the electronic device according to the mode of the vehicle.
The first, second, third valve is
Vehicle heat pump system comprising a 3-way valve.
The air conditioner means
An HVAC module provided with an opening / closing door therein to selectively adjust the outside air passing through the evaporator to the internal condenser and the PCT heater according to the heating, cooling, and dehumidifying modes of the vehicle;
A compressor connected to the evaporator through a refrigerant line and compressing refrigerant in a gaseous state;
An accumulator disposed on the refrigerant line between the compressor and the evaporator, the accumulator supplying only the gas refrigerant to the compressor;
A first refrigerant valve selectively supplying the refrigerant discharged from the compressor to the internal condenser according to the mode of the vehicle;
A first expansion valve for receiving and expanding the refrigerant passing through the internal condenser;
A second refrigerant valve which is expanded through the first expansion valve and supplies the heat exchanged refrigerant to the evaporator or to the accumulator while passing through the water cooling capacitor; And
A second expansion valve disposed between the evaporator and the second refrigerant valve and expanding the refrigerant introduced through opening and closing of the second refrigerant valve;
The heat pump system comprising:
Vehicle pressure pump system characterized in that the pressure sensor is mounted on the refrigerant line connecting the compressor and the first refrigerant valve.
The first and second refrigerant valves
And a 3-way valve.
The cooling means and air conditioning means
Each of the vehicle heat pump system is connected to the controller, characterized in that the operation by the control signal of the controller.
The cooling means in the heating mode
The controller determines the external temperature, the temperature of the coolant passing through the electrical equipment, and the state of the vehicle, and selectively supplies the coolant to the water cooling capacitor through the first and second cooling lines through the selective operation of each valve. By controlling the temperature of the refrigerant by heat-exchanging the refrigerant and the cooling water introduced into the water cooling capacitor through the refrigerant line,
The air conditioner means
The first refrigerant in a state in which the refrigerant whose temperature is increased through heat exchange with the cooling water in the water cooling capacitor is compressed into a gas refrigerant under high temperature and high pressure by passing through the accumulator and the compressor along the refrigerant line through the opening of a second refrigerant valve. Through the operation of the valve to the internal condenser of the HVAC module,
The refrigerant passing through the internal condenser is expanded through a first expansion valve, is supplied to the water cooling condenser and circulated, and the open / close door is opened so that external air passing through the evaporator of the HVAC module passes through the internal condenser. And heating the inside of the vehicle with the selective operation of the PTC heater while opening and passing the outside air through the internal condenser.
The heating mode
Cooling water is divided into first, second, third, fourth, and fifth heating modes according to the temperature state of the outside air, the initial state of driving the vehicle, and the low temperature driving state of the vehicle to control opening and closing of each valve of the cooling means. Control method of a vehicle heat pump system, characterized in that for controlling the flow of.
The cooling means in the first heating mode
When the outside air temperature is below zero, the first, second, and third valves are operated to circulate the cooling water through the second cooling line, and the electrical appliances are along the second cooling line through the second radiator and the second cooling pump. Passing through the waste heat source generated from the electrical equipment, the heat pump system control method for a vehicle characterized in that flowing into the water-cooled capacitor in a state in which the temperature of the cooling water is raised.
The cooling means in the second heating mode
When the outside temperature is an image and the temperature of the electronic device is low and cooling is not necessary, the first valve and the third valve are operated to circulate the cooling water through the first cooling line, and through the operation of the first water pump. Cooling water heat-exchanged with the outside heat source while passing through the first radiator is introduced into the water cooling capacitor.
The cooling means in the third heating mode
When the external heat source and the waste heat source generated from the electrical equipment are to be used at the same time, the first, second and third valves are operated to circulate the cooling water through the first and second cooling lines, respectively. Cooling water heat exchanged with the external heat source while passing through the first radiator through the operation, and the cooling water passing through the second radiator and the electrical equipment through the operation of the second water pump flows into the water cooling condenser. System control method.
The cooling means in the fourth heating mode
When the outside temperature is the initial state of vehicle operation in a cryogenic state, all of the first, second, and third valves are closed, and the operation of the first and second water pumps is stopped so that the first and second cooling lines are closed. Method of controlling a vehicle heat pump system, characterized in that the cooling water is not circulated through to prevent the introduction of cooling water into the water cooling capacitor.
The cooling means in the fifth heating mode
When the vehicle is in a low temperature driving state, the first and third valves are operated, and the coolant is circulated along the second cooling line through the operation of the second water pump, and the coolant is operated through the operation of the second valve. 2. The method of controlling a heat pump system for a vehicle according to claim 1, wherein the cooling water having an elevated temperature is introduced into the water cooling capacitor through heat exchange with a waste heat source of the electrical equipment.
The cooling means in the dehumidification mode
A cooling fan is operated by the controller to cool the cooling water introduced into the second radiator along the second cooling line together with the outside air, and flows into the water cooling condenser while cooling the electrical equipment through the operation of the second water pump. By lowering the temperature of the refrigerant through heat exchange with the cooling water introduced into the water-cooled capacitor,
The air conditioner means
Opening the second refrigerant valve to supply the low-temperature refrigerant cooled while passing through the water cooling capacitor to the second expansion valve connected to the evaporator of the HVAC module, and supplying the expanded refrigerant to the evaporator,
The evaporator discharges the refrigerant evaporated through heat exchange with the outside air and compresses the same through the accumulator and the compressor. The refrigerant line connected to the internal condenser is opened through the operation of the first refrigerant valve. Supply it,
The refrigerant passing through the internal condenser is expanded through a first expansion valve, and is supplied to the water cooling condenser and circulated, and the open / closed air is passed through the internal condenser while passing through the evaporator of the HVAC module from the outside. And dehumidifying the vehicle interior while the door is opened and the introduced outside air passes through the internal condenser and the PTC heater.
The cooling mode
And a first and second cooling modes according to a general driving state and an initial starting driving state of the vehicle, and controlling the flow of the cooling water through opening and closing control of each valve of the cooling means.
In the first cooling mode
Cooling means
When the vehicle is in a normal driving condition, the first and third valves are operated to circulate the cooling water through the first cooling line, and exchange heat with outside air while passing through the first radiator through the operation of the first water pump. The supplied cooling water is introduced into the water cooling capacitor, and the temperature of the refrigerant is controlled by heat-exchanging the refrigerant and the cooling water introduced into the water cooling capacitor through the refrigerant line.
The air conditioner means
Supplying the expanded refrigerant to the evaporator by operating the second refrigerant valve so that the low temperature refrigerant cooled while passing through the water cooling capacitor flows into the second expansion valve connected to the evaporator of the HVAC module,
The refrigerant evaporated through heat exchange with the outside air is discharged from the evaporator and compressed while passing through the accumulator and the compressor. The refrigerant line connected to the water cooling capacitor is circulated through the operation of the first refrigerant valve,
Cooling the inside of the vehicle by closing the opening and closing the door directly to the inside of the vehicle so that the outside air cooled while passing through the evaporator by the refrigerant introduced into the evaporator is not introduced into the internal condenser. Vehicle heat pump system control method.
In the second cooling mode
Cooling means
In the condition of the initial starting running state of the vehicle, the first, second and third valves are operated to circulate the cooling water through the first and second cooling lines, respectively, to increase the flow rate of the cooling water, and the first water Cooling water exchanged with the outside air while passing through the first radiator through the operation of the pump, and cooling water passing through the second radiator and the electrical equipment through the operation of the second water pump flows into the water cooling condenser, and through the refrigerant line And controlling the temperature of the refrigerant by heat-exchanging the refrigerant introduced into the water cooling condenser and the cooling water.
Cooling load of the electrical equipment is very large, when the abnormal heat generation in the electrical equipment, the vehicle heat pump system control method characterized in that it further comprises an electrical equipment cooling mode for cooling the electrical equipment.
Cooling means in the electrical appliance cooling mode
Cooling water circulated along the first and second cooling lines through the operation of the first, second, and third valves is operated to enter the electrical equipment,
Cooling water exchanged with the outside air while passing through the first radiator through the operation of the first water pump, and cooling water cooled by the cooling fan while passing through the second radiator through the operation of the second water pump flows into the electrical equipment. ,
Cooling the electronic device while the coolant is circulated through the operation of the bypass line connecting the second cooling line provided between the electronic device and the first and second valves and the fourth valve provided on the bypass line. Vehicle heat pump system control method characterized in that.
The heating mode, dehumidification mode, cooling mode, and the electrical appliance cooling mode
And the controller controls the air flow rate of the cooling fan and the flow rates of the first and second water pumps according to the temperature state of the waste heat source generated from the electrical equipment and the temperature state of the cooling water and the refrigerant. System control method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020110090311A KR101283592B1 (en) | 2011-09-06 | 2011-09-06 | Heat pump system for vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020110090311A KR101283592B1 (en) | 2011-09-06 | 2011-09-06 | Heat pump system for vehicle |
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| Publication Number | Publication Date |
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| KR20130026872A true KR20130026872A (en) | 2013-03-14 |
| KR101283592B1 KR101283592B1 (en) | 2013-07-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020110090311A KR101283592B1 (en) | 2011-09-06 | 2011-09-06 | Heat pump system for vehicle |
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