KR100756943B1 - Cooling apparatus using accumulating cold in vehicle and cooling method using thereof - Google Patents

Abstract

A cooling apparatus using cold storage in a hybrid vehicle is provided to prevent lowering of fuel efficiency by supplying cool air accumulated in a cold storage heat exchanger to the inside of the vehicle during idle stop of the vehicle, and to have excellent heat transfer efficiency by allowing the cold storage heat exchanger to be contacted with an evaporator. A cooling apparatus using cold storage in a hybrid vehicle realizing a refrigerant cycle by an evaporator(10) comprises a cold storage heat exchanger(20). The cold storage heat exchanger is disposed in a rear surface of the evaporator, contacted with the evaporator for heat-exchanging, and filled with cold storage material. A fin(14) consisting of the evaporator and a fin(24) consisting of the cold storage heat exchanger are tightly adhered by an adhesive consisted of a heat transfer component.

Description

Cooling apparatus using accumulating cold in vehicle and cooling method using

1 is a flowchart of a main portion showing an example of a control method used in a conventional hybrid vehicle cooling system;

2 is a flowchart of a main portion showing another example of a control method used in a conventional hybrid vehicle cooling system;

Figure 3 is a schematic block diagram showing a cooling system using the cold storage according to the prior art.

4 is a view schematically showing a cooling device of a hybrid vehicle using storage cooling according to the present invention;

5 is an exploded perspective view showing the main part of the present invention an evaporator and a cold storage heat exchanger;

Figure 6 is a plan view showing in detail the evaporator and the cold storage heat exchanger that is the main portion of the present invention;

7 and 8 are flowcharts illustrating a cooling method of a hybrid vehicle using heat storage according to the present invention.

※ Explanation of symbols about main part of drawing ※

10: evaporator

12: refrigerant pipe

14: Pin

20: cold storage heat exchanger

22: cold storage pipe

24: pin

The present invention relates to a cooling device for a hybrid vehicle using cold storage and a cooling method using the same.

As fossil fuels are recently depleted, the prices of energy sources, such as gasoline and diesel, are increasing.

Therefore, automakers are investing a lot of manpower and money in the development of hybrid and electric vehicles for realizing fuel economy savings, and some of them are commercially available to attract a lot of attention.

The hybrid vehicle adopts a system in which an idle stop is made to stop the engine when the vehicle is stopped, such as waiting for a signal, to improve fuel efficiency.In this case, when the air conditioner is running, the idle stop is not made and the engine is kept running. If the air conditioner is not in operation, there is a problem that the room temperature rises rapidly as time passes after the idle stop.

A conventional method for solving this problem will be described with reference to the drawings.

1 is a flowchart of an essential part showing an example of a control method used in a conventional hybrid vehicle cooling system.

The method comprises the steps of determining whether the engine is in the idle state by stopping the vehicle such as a signal waiting (110), whether the driver or the like is operating the air conditioner when the engine is in the idle state (120), and the step ( In step 120, the engine is driven when the blower is not in an off state (130), and in step 120, when the blower is in the off state, the engine is stopped (140).

However, this method has a problem in that the engine is driven when the blower is turned on to raise fuel economy.

Fig. 2 is a flowchart of major parts showing another example of a control method used in a conventional hybrid vehicle cooling system.

The method comprises the step 210 in which the engine is in the idling state by the vehicle stop such as a signal waiting, and in step 220 in which the driver or the like operates the air conditioner in the idle state of the engine to turn on the blower, and the step ( If the blower is not in the OFF state in step 220, the step of driving the compressor 230, and determining whether the voltage of the battery is lower than the predetermined voltage (V) by driving the compressor (240), and the step 220 In the blower is turned off or in the step 240, if the power storage capacity of the battery is not less than the predetermined power storage amount (Q) step of stopping the engine (250), and the power storage capacity of the battery battery is set in advance in step 240 And driving the engine when it is less than the power storage amount Q.

However, such a method also has a problem in that the fuel consumption of the battery is reduced by driving the compressor, thereby increasing fuel economy.

Meanwhile, a cooling system using accumulator cooling has been proposed as a method of cooling the interior of a vehicle while the engine is stopped.

As an example, the Republic of Korea Patent Publication No. 2001-29349, as shown in Figure 3, is provided with an evaporator 310 is installed to implement a conventional refrigerant cycle, and a cold storage 320 for accumulating cold air.

In addition, the refrigerant inlet pipe 330 is branched into two, and the branched first refrigerant inlet pipe 332 is connected to the evaporator 310, and the second refrigerant inlet pipe 334 is connected to the storage cooler 320.

In addition, valves 333 and 335 are installed in the first refrigerant inlet pipe 332 and the second refrigerant inlet pipe 334, respectively, and the fan for supplying cold air to the interior of the vehicle. 322 is installed.

Reference numeral 340 denotes a control unit for controlling the cooling system by a program input in advance.

According to this configuration, the cooler 320 is supplied by allowing the coolant to be supplied to the cooler 320 by opening part or all of the valves 335 of the second coolant inlet pipe 334 in the normal running condition in which the engine is operated. The cold air is accumulated in the cold storage material provided in the cold storage tank 324 of the engine, and when the engine is stopped, the fan 322 is operated to supply the accumulated cold air to the interior of the vehicle.

However, the technique disclosed in the Republic of Korea Patent Publication No. 2001-29349 described above is a structure in which the evaporator 310 and the cooler 320 are installed in separate spaces, which places a lot of restrictions on the design layout.

In addition, the entire structure is complicated because a part or all of the refrigerant flowing into the evaporator 310 is supplied to the cold storage 320 and a pipe for discharging the refrigerant supplied to the cold storage 320 is required.

Accordingly, the present invention is to solve the above-mentioned problems, to provide a cooling device and a cooling method using the same of the hybrid vehicle that can cool the interior of the vehicle for a long time while the engine is stopped. For that purpose.

In addition, another object of the present invention is to provide a cooling device and a cooling method using the same of the hybrid vehicle using the axial cooling, so that the lateral cooling of the design is improved by a simple structure made.

As a technical configuration for achieving the above object, the present invention is a cooling device of a hybrid vehicle in which a refrigerant cycle is implemented by an evaporator, disposed on the rear side of the evaporator is in contact with the evaporator to exchange heat with the accumulator coolant is filled And a fin forming the evaporator and a fin forming the accumulator heat exchanger are characterized in that the cooling device of the hybrid vehicle using the cold storage in close contact with each other by an adhesive made of a component capable of transferring heat.

In another aspect, the present invention, the hybrid vehicle using the refrigeration refrigeration comprising an evaporator is installed to implement a conventional refrigerant cycle, and a refrigeration heat exchanger which is disposed on the rear side of the evaporator and in contact with the evaporator to exchange heat with the evaporator is filled with the coolant. A method for controlling an air conditioner, the method comprising: measuring an indoor temperature of a vehicle when the vehicle is switched to an idle stop state and storing the temperature as a "previous temperature value"; Measuring the indoor temperature of the vehicle and storing the measured temperature as a “current temperature value”; It is determined whether the measured present temperature value is greater than the sum of the previous temperature value and the set temperature deviation value. If the result is no, the step of measuring the room temperature of the vehicle and storing it as the “current temperature value” is performed again. If yes, go to the next step; And a method of cooling the hybrid vehicle using the axial cooling configured to include driving the engine.

Hereinafter, with reference to the accompanying drawings, the present invention will be described in more detail.

Figure 4 is a schematic configuration diagram showing a cooling device of a hybrid vehicle using the cold storage according to the present invention, Figure 5 is an exploded perspective view showing an evaporator and a cold storage heat exchanger as the main components of the present invention.

Conventional cooling systems used in vehicles include a compressor driven by an engine power, a condenser supplied with compressed refrigerant from the compressor and condensed by indirect heat exchange with air, an expansion valve supplied with the refrigerant from the condenser, and expanded; And an evaporator receiving the refrigerant from the expansion valve and evaporating the air by indirect heat exchange. Then, air cooled by indirect heat exchange with the refrigerant passing through the evaporator is supplied to the interior of the vehicle, and this air flow is formed by the operation of the blower.

The present invention has a cold storage heat exchanger (20) which is installed at the rear side of the evaporator (10), that is, air is supplied to the interior of the vehicle through the evaporator (10).

A more detailed structure of the evaporator 10 and the cold storage heat exchanger 20 is shown in FIG.

The evaporator 10 includes a refrigerant pipe 12 that provides a path through which the refrigerant is circulated, and a fin 14 formed outside the refrigerant pipe 12 to improve heat exchange efficiency.

The cold storage heat exchanger 20 includes a cold storage material pipe 22 filled with a cold storage material and a fin 24 formed outside the cold storage material pipe 22 to improve heat exchange efficiency.

The cold storage pipe 22 and the fin 24 of the cold storage heat exchanger 20 are formed so as not to disturb the flow of air passing through the evaporator 10 toward the vehicle interior.

It is necessary to slightly increase the capacity of the blower through the evaporator 10 and the cold storage heat exchanger 20 to move the air toward the vehicle interior. This is because when both the evaporator 10 and the cold storage heat exchanger 20 are installed, the flow resistance of the air is increased as compared with the case where only the evaporator 10 is installed.

Therefore, if the capacity of the blower is appropriately increased, the flow rate of air passing through the evaporator 10 may be sufficient to maintain the cooling efficiency by the refrigerant to a desired level.

The present invention has a structure in which the cold air of the evaporator 10 is stored in the cold storage material of the cold storage heat exchanger 20 by bringing the evaporator 10 and the cold storage heat exchanger 20 into contact with each other. That is, the cold air of the evaporator 10 is delivered to the cold storage heat exchanger 20 in contact with the evaporator 10, and the cold air delivered to the cold storage heat exchanger 20 is supplied to the cold storage material filled in the cold storage material pipe 22. It is accumulating.

The contact between the evaporator 10 and the cold storage heat exchanger 20 is substantially the contact between the fins 14 forming the evaporator 10 and the fins 24 forming the cold storage heat exchanger 20. (24) is preferably bonded using an adhesive having a high heat transfer coefficient.

The adhesive used for bonding the fins 14 and 24 may be, for example, what is called thermal grease. The thermal grease is used when attaching a heat dissipation fin to a CPU of a PC and has a large heat transfer coefficient.

As an example of a thermal grease, "Zalman ZM-STG1" can be used, which is a non-curing compound with a specific gravity of 2.86 and a guaranteed operating temperature of -45 ° C to 150 ° C (-49 ° F to 302 ° F). The thermal conductivity is 4W / mK.

As the coolant filled in the coolant pipe 22, it is preferable to use a paraffin-based coolant, and the paraffin-based coolant has a large heat storage amount.

Such a cool storage material is sufficient if it is filled in the cool storage pipe (22). That is, the cool storage material does not need to move along the cool storage pipe 22.

The cold storage pipe 22 of the cold storage heat exchanger 20 is appropriately set in size and arrangement so that sufficient cold air is stored in the cold storage material filled therein, and in the embodiment of the present invention, the cold storage pipe 22 It can be seen that has a larger size than the refrigerant pipe 12 and is arranged in two rows.

Of course, the apparatus of the present invention is provided with control mechanisms (not shown) installed in the interior of the vehicle and a control unit (not shown) that receives the information input from the control mechanisms and performs cooling by a previously input program. Include. In particular, the control unit is installed in the vehicle and is configured to receive information on the room temperature of the vehicle from the temperature sensor for measuring the temperature and to receive other driving information and the like.

The method for cooling the interior of a vehicle using the air conditioner of the present invention can be divided into two types.

The first cooling method will be described with reference to FIG.

The engine enters the idle state by the vehicle stop such as a waiting signal (step 31). This state is an idle stop state in which driving of the engine is stopped.

At this time, when the engine enters the idle state, the control unit receives a temperature value measured from a temperature sensor installed in the vehicle interior and stores it as a "previous temperature value" (step 32).

This previous temperature value is estimated to be the room temperature of the vehicle adjusted in an appropriate state by the driver or the like.

When the engine enters the idle state when the driver or the like turns on the air conditioner to the blower, that is, cooling is performed, the on state of the blower is maintained, and the cold air accumulated in the cold storage heat exchanger 20 is maintained. Supplied to the interior of the vehicle.

When the cold air accumulated in the cold storage heat exchanger 20 gradually decreases and the idle stop state continues for a predetermined time, the indoor temperature of the vehicle gradually increases.

At this time, the room temperature of the vehicle is continuously input to the control unit through the temperature sensor and stored as a "current temperature value" (step 33).

The controller determines whether the input current temperature value is greater than the sum of the previous temperature value and the preset temperature deviation value α (step 34).

The temperature deviation value α is set in consideration of the degree of heat felt by ordinary people, and may be adjusted by the driver or the like as necessary.

In the step 34, if the present temperature value is smaller than the sum of the previous temperature value and the preset temperature deviation value α, the idle stop state is maintained and the indoor temperature of the vehicle is inputted to the "current temperature value". Returning to step 33 above is performed.

In contrast, when the present temperature value is larger than the sum of the previous temperature value and the preset temperature deviation value α in the step 34, the engine is driven (step 35).

A second cooling method will be described with reference to FIG.

The engine enters the idling state due to vehicle stop such as waiting for a signal (step 41). This state is an idle stop state in which driving of the engine is stopped.

At this time, when the engine enters the idle state, the control unit receives a temperature value measured from a temperature sensor installed in the vehicle interior and stores it as a "previous temperature value" (step 42).

As in the case of the first method, when the blower is in the on state, the cool air accumulated in the cold storage heat exchanger 20 is supplied to the interior of the vehicle.

The indoor temperature of the vehicle is continuously input to the control unit through the temperature sensor and stored as a "current temperature value" (step 43).

The controller determines whether the input current temperature value is greater than the sum of the previous temperature value and the preset temperature deviation value α (step 44).

In the step 44, when the present temperature value is smaller than the sum of the previous temperature value and the preset temperature deviation value α, the idle stop state is maintained and the indoor temperature of the vehicle is inputted to the "current temperature value". The process returns to step 43 where it is stored.

On the contrary, if the present temperature value is greater than the sum of the previous temperature value and the preset temperature deviation value α in step 44, the compressor is driven to perform indoor cooling of the vehicle using the refrigerant (step 45).

When the compressor is driven, the power storage amount of the battery decreases, and it is determined whether the power storage amount is smaller than the preset power storage amount Q (step 46).

When the power storage amount of the storage battery is larger than the preset power storage quantity Q at the step 46, the operation of the compressor using the storage battery is returned to the step 45 where the driving is continued.

On the contrary, when the power storage amount of the battery is smaller than the preset power storage amount Q in the step 46, the engine is driven (step 47).

The operation of the cooling device and the cooling method of the present invention having the above configuration will be described.

In a normal driving condition in which the engine is driven, a cooling system using the phase change of the refrigerant is operated.

At this time, the refrigerant supplied to the refrigerant pipe 12 of the evaporator 10 is evaporated by indirect heat exchange with the air passing through the evaporator 10 to take heat from the air.

Thus, cool air is supplied to the interior of the vehicle.

At the same time, cold air is also delivered to the cold storage heat exchanger 20 which is installed in contact with the evaporator 10, and the cold air is stored in the cold storage material filled in the cold storage material pipe 22 of the cold storage heat exchanger 20.

In this case, the cold air is transferred from the evaporator 10 to the cold storage heat exchanger 20 through the adhesive, and the larger the heat transfer coefficient is used, the greater the amount of heat is transferred to the cold storage heat exchanger 20, thereby providing a faster time. Accumulation takes place.

Of course, when the cold storage heat exchanger 20 is sufficiently cooled, heat exchange between the evaporator 10 and the cold storage heat exchanger 20 is not performed, and both cold air is supplied to the interior of the vehicle.

Even if the storage cooling heat exchanger 20 is sufficiently stored or otherwise, when the engine enters an idle state due to vehicle stop such as a signal waiting, the cooling of the vehicle interior by the refrigerant is stopped.

At this time, the blower keeps on, and the air supplied to the vehicle interior through the evaporator 10 and the cold storage heat exchanger 20 is cooled by the cold air accumulated in the cold storage heat exchanger 20.

Therefore, the interior of the vehicle can be kept cool for a certain time.

As the amount of cold air accumulated in the cold storage heat exchanger 20 decreases, the temperature of the air supplied to the interior of the vehicle gradually increases, and when the temperature of the air rises higher than the preset temperature, driving of the compressor or driving of the engine is performed. The indoor cooling of the vehicle using the refrigerant is performed by the.

In this way, cold air is accumulated in the cold storage heat exchanger 20, and the accumulated cold air is supplied to the vehicle interior at the idle stop of the vehicle.

Therefore, the fuel economy is prevented from being reduced by maximally suppressing the driving of the compressor or the engine.

As described above, according to the cooling device of the hybrid vehicle using the cold storage and the cooling method using the same according to the present invention, cold air is accumulated in the cold storage heat exchanger installed at the rear side of the evaporator, and the accumulated cold air is stored in the vehicle at the idle stop of the vehicle. By being supplied to the room has an excellent effect that can suppress the driving of the compressor or the engine as much as possible to prevent the fuel economy.

In particular, the heat storage heat exchanger is installed to be in contact with the evaporator to not only improve heat transfer efficiency, but also reduce the layout space of these components than the conventional one, thereby improving design freedom of layout.

Claims (8)

In the cooling device of a hybrid vehicle in which a refrigerant cycle is implemented by an evaporator, It is disposed on the rear side of the evaporator and includes a cold storage heat exchanger which is in contact with the evaporator to exchange heat and filled with the coolant, The fins constituting the evaporator and the fins constituting the cold storage heat exchanger are in close contact with each other by an adhesive made of a component capable of transferring heat. The air conditioner of claim 1, wherein the adhesive is thermal grease. The coolant heat exchanger of claim 1, wherein the coolant heat exchanger comprises a coolant pipe filled with coolant and a fin formed on an outer side of the coolant pipe to increase the heat exchange area. Device. According to claim 1 or claim 3, wherein the coolant is a cooling device of a hybrid vehicle using cool storage, characterized in that the cool storage of paraffin series. According to claim 1, wherein the temperature sensor is installed in the interior of the vehicle to measure the temperature, and when the indoor temperature of the vehicle provided from the temperature sensor is higher than the preset temperature to drive the compressor and the storage of the battery by the drive of the compressor And a control unit programmed to drive the engine when the amount is smaller than a preset power storage amount. The apparatus of claim 1, further comprising a temperature sensor installed in a vehicle and measuring a temperature, and a controller programmed to drive the engine when the vehicle's indoor temperature provided from the temperature sensor is higher than a preset temperature. Cooling device for a hybrid vehicle using cold storage. Controlling the cooling device of the hybrid vehicle using the storage cooling including an evaporator which is installed to implement a conventional refrigerant cycle, and a cold storage heat exchanger which is disposed on the rear side of the evaporator to be in contact with the heat exchanger with the evaporator and filled with a coolant. For Measuring the indoor temperature of the vehicle and storing it as a "previous temperature value" when the vehicle is switched to the idle stop state; Measuring the indoor temperature of the vehicle and storing the measured temperature as a “current temperature value”; It is determined whether the measured present temperature value is greater than the sum of the previous temperature value and the set temperature deviation value. If the result is no, the step of measuring the room temperature of the vehicle and storing it as the “current temperature value” is performed again. If yes, go to the next step; And Cooling method of a hybrid vehicle using the cold storage configured to drive the engine. The method of claim 7, wherein Determining whether the measured present temperature value is greater than the sum of the previous temperature value and the set temperature deviation value, and if the result is YES, driving the compressor; And determining whether the power storage amount of the capacitor is smaller than a predetermined power storage amount, and if the result is no, continues to drive the compressor, and if the result is yes, the process includes moving to driving the engine. Cooling method.

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