KR102321485B1 - Apparatus and method for controling cooling water flow rate of heating system for vehicle - Google Patents

Abstract

The present invention relates to a cooling water flow control device and control method for a vehicle heating device, wherein a flow control valve (40) and a water pump (50) are installed in a coolant circulation line, and their operation is controlled by an electronic control unit (60) according to the coolant temperature ), it is possible to maintain the temperature of the indoor exhaust air at a constant level despite the change in the coolant temperature.

Description

Apparatus and method for controlling cooling water flow rate of heating system for vehicle}

The present invention relates to a cooling water flow control apparatus and control method for a vehicle heating device, and more particularly, to a cooling water flow rate control device and control for a vehicle heating device capable of maintaining a constant temperature of indoor discharge air despite a change in coolant temperature it's about how

A vehicle heating system is configured to heat-exchange air through a heater core through which engine coolant circulates, and then discharge it to the interior.

The air conditioner (1) installed in the engine room has a heater core (3) and an evaporator (4) built-in. For selection, a temperature control door (5), a refrost vent door (6a), a center fascia vent door (6b), a foot vent door (6c), etc. are installed.

The engine 2 and the coolant circulation pipe are connected to the heater core 3 , and the outside air is heated by absorbing heat from the engine coolant in the heater core 3 .

Therefore, when the occupant turns on the heating switch, the temperature control door 5 opens the flow path toward the heater core 3 and air is heated while passing through the heater core 3, and then, the refrigerating vent door 6a, the center According to the open state of the fascia vent door (6b) and the foot vent door (6c), hot air is discharged to the corresponding part.

As described above, a heating device for a vehicle that heats a vehicle by discharging heated air through heat exchange with a heater core in which the engine coolant circulates is disclosed in Korean Patent Laid-Open No. 10-2010-0047489 (published on May 10, 2010). ) is shown in

On the other hand, in the case of a vehicle to which an engine that generates heat at a high temperature, such as an Atkinson engine, is applied, the temperature of the engine coolant rises to a level of 120°C (general engine coolant temperature is about 85°C to 95°C)

Therefore, when the coolant temperature is excessively high as described above, the temperature of the heating air discharged from the outlet may also rise excessively to about 100°C to 110°C, and in this case, deformation of parts such as ducts and vent grills may occur , in particular, there is a problem in that the feet of the passenger may be burned when discharged in the foot mode.

Accordingly, the present invention has been devised to solve the above problems, and by controlling the flow rate of the coolant supplied to the heater core according to the engine coolant temperature, the temperature of the air discharged into the room after heat exchange with the heater core is set to an appropriate temperature. An object of the present invention is to provide a cooling water flow rate control device and control method of a vehicle heating device capable of maintaining

According to an aspect of the present invention, there is provided an apparatus for controlling a coolant flow rate of a heating device for a vehicle according to the present invention, between an engine and a heater core so that both a coolant supply flow from an engine to a heater core and a coolant return flow from the heater core to the engine pass through. a flow control valve connected to a cooling water circulation pipe connecting and an electronic control unit for receiving coolant temperature information from an electric water pump and a coolant temperature sensor and controlling the operation of the flow control valve and the water pump according to the coolant temperature.

In the flow control valve, an internal space is partitioned by a first partition wall, a second partition wall, a third partition wall, and a fourth partition wall, and a first flow passage hole, a second flow passage hole, a third flow passage hole, and a fourth flow passage are formed in the partition walls. Holes are formed, respectively, a supply cooling inlet is formed in a space between the first bulkhead and the third bulkhead, a supply cooling outlet is formed in a space between the third bulkhead and the second bulkhead, and the A return cooling inlet is formed in the space therebetween, a return cooling outlet is formed in a space between the fourth bulkhead and the first bulkhead, and the first valve rotates between the first and third bulkheads while rotating between the first flow hole and the third bulkhead. The passage hole is opened and closed, and the second valve is rotated between the second and fourth partition walls to open and close the second and fourth passage holes.

When it is determined that the coolant temperature is lower than the appropriate temperature range, the electronic control unit closes the first flow hole by closing the first valve of the flow control valve toward the first bulkhead, and closes the second valve toward the second bulkhead. It is characterized in that it blocks the 2 passage hole and operates the water pump at high speed.

When it is determined that the coolant temperature is within the appropriate temperature range, the electronic control unit places the first valve of the flow control valve in the middle portion between the first and third bulkheads and places the second valve between the second and fourth bulkheads. It is characterized in that all flow holes are opened by positioning it in the middle part between them, and the water pump is operated at medium speed.

When the opening amounts of the first and second valves are increased, the operating speed of the water pump is decreased, and when the opening amounts of the first and second valves are decreased, the operating speed of the water pump is increased.

When it is determined that the coolant temperature is higher than the appropriate temperature range, the electronic control unit closes the first valve of the flow control valve to the third bulkhead to finely open the third passage hole, and brings the second valve close to the fourth bulkhead. It is characterized in that the fourth passage hole is finely opened and the water pump is operated at a low speed.

In addition, the method for controlling the flow rate of a coolant in a heating device for a vehicle according to the present invention includes: detecting a coolant temperature receiving a coolant temperature measurement value from a coolant temperature sensor; and determining a coolant temperature by comparing the coolant temperature measurement value with a set appropriate coolant temperature range. And, when the coolant temperature is determined to be low in the coolant temperature determination step, the coolant flow rate upward adjustment step of increasing the coolant flow rate supplied to the heater core, and when the coolant temperature is determined to be appropriate in the coolant temperature determination step and a cooling water flow rate maintaining step of maintaining the cooling water flow rate and a cooling water flow rate downward adjusting step of decreasing the cooling water flow rate supplied to the heater core when it is determined that the cooling water temperature is high in the cooling water temperature determining step.

In the step of adjusting the coolant flow rate upward, the first valve of the flow control valve is pressed toward the first bulkhead to close the first flow hole, the second valve is brought into close contact with the second bulkhead to block the second flow hole, and the water pump is It is characterized by driving at high speed.

The cooling water flow rate maintenance step is characterized in that both the first valve and the second valve of the flow control valve are adjusted to an intermediate opening degree to open all the flow path holes, and the water pump is operated at a medium speed.

When the opening amounts of the first and second valves are increased, the operating speed of the water pump is decreased, and when the opening amounts of the first and second valves are decreased, the operating speed of the water pump is increased.

In the cooling water flow rate downward adjustment step, the first valve of the flow control valve is brought close to the third bulkhead to finely open the third flow path hole, the second valve is brought close to the fourth bulkhead to finely open the fourth flow path hole, and the water It is characterized in that the pump is operated at low speed.

According to the present invention as described above, by controlling the operation of the flow control valve and the water pump according to the coolant temperature to control the amount of heat of coolant supplied to the heater core according to the change in coolant temperature, the temperature of the air discharged into the room is maintained at a constant level. It has the effect of being able to maintain it.

In particular, even when the coolant temperature is excessively high, the temperature of the indoor discharge air does not rise together, thereby preventing the deformation of the duct or vent grill, and there is an effect that the foot of the passenger is not injured even when the foot mode is discharged.

1 is a block diagram of a general air conditioning device (air conditioning duct).
2 is a block diagram of a coolant flow rate control device of a vehicle heating device according to the present invention.
3 is a cross-sectional view showing the configuration of the flow control valve, which is one configuration of the present invention, and is a flow control valve operation state diagram when the coolant temperature is low.
4 is an operation state diagram when the coolant temperature is appropriate.
5 is a flow control valve operation state diagram when the coolant temperature is high.
6 is a flowchart of a method for controlling a coolant flow rate of a heating device for a vehicle according to the present invention.

Since the present invention can have various changes and can have various embodiments, specific embodiments are illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to specific embodiments, and it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention. The thickness of the lines or the size of the components shown in the accompanying drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or precedent of the user or operator. Therefore, definitions of these terms should be made based on the content throughout this specification.

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

As shown in FIG. 2 , in the cooling water flow control device of the vehicle heating apparatus according to the present invention, the coolant supply flow from the engine 10 to the heater core 20 and the coolant return from the heater core 20 to the engine 10 . A pair of cooling water circulation conduits 31, 32, 33 and 34 connecting the engine 10 and the heater core 20 so that all flows pass through and controlling the paths of the cooling water supply flow and the cooling water return flow. A flow control valve 40 having valves 49a and 49b, an electric water pump 50 and cooling water installed in the heater core-side inlet pipe 32 among the cooling water circulation pipes 31, 32, 33, 34 and an electronic control unit 60 that receives coolant temperature information from the on-sensor 70 and controls the operation of the flow control valve 40 and the water pump 50 according to the coolant temperature.

The coolant circulation pipes 31 , 32 , 33 , and 34 include an engine side discharge pipe 31 , a heater core side inflow pipe 32 , a heater core side discharge pipe 33 , and an engine side inflow pipe 34 .

The pair of valves 49a and 49b includes a driving motor (not shown) as a first valve 49a for controlling the supply flow and a second valve 49b for controlling the return flow, respectively, and their respective The motor is controlled by the electronic control unit 60 to control the rotational positions of the first valve 49a and the second valve 49b.

The water pump 50 is also operated by a motor as described above, and this motor is also controlled by the electronic control unit 60 so that the rotation speed (rpm) of the water pump 50 is controlled.

As shown in FIG. 3 , the flow control valve 40 includes a supply cooling inlet 41 , a supply cooling outlet 42 , a return cooling inlet 43 , and a return cooling outlet 44 .

The engine side exhaust pipe 31 is connected to the supply cooling inlet 41 , the heater core side inlet pipe 32 is connected to the supply cooling outlet 42 , and the heater core side exhaust pipe 33 is connected to the return cooling inlet 43 . is connected, and the engine-side inlet pipe 34 is connected to the return cooling outlet 44 .

Inside the flow control valve 40, the supply cooling inlet 41, the supply cooling outlet 42, the return cooling inlet 43, and the return cooling outlet 44 are connected to the respective independent spaces of the flow control valve 40. ) partition walls (45, 46, 47, 48) dividing the inner space are installed.

Among the partition walls 45, 46, 47, and 48, the first partition wall 45 and the second partition wall 46 disposed in the substantially transverse direction separate the supply flow space and the return flow space, and are disposed in the substantially longitudinal direction. The third partition wall 47 and the fourth partition wall 48 separate the engine-side connection space and the heater core-side connection space.

The first partition wall 45 , the second partition wall 46 , the third partition wall 47 , and the fourth partition wall 48 have a first passage hole 45a, a second passage hole 46a, and a third passage hole ( 47a) and a fourth passage hole 48a is formed.

The first valve 49a opens and closes the first passage hole 45a and the third passage hole 47a formed in the partition wall while rotating between the first partition wall 45 and the third partition wall 47 .

The second valve 49b opens and closes the second passage hole 46a and the fourth passage hole 48a formed in the second partition wall 46 and the fourth partition wall 48 while rotating.

The coolant temperature sensor 70 is a normal coolant temperature sensor that measures the coolant temperature for engine operation control, and always measures the coolant temperature and transmits it to the electronic control unit 60 .

The electronic control unit 60 determines the appropriateness of the coolant temperature transmitted from the coolant temperature sensor 70 . That is, if the cooling water temperature is 65 ℃ or less, it is judged to be low, if it is more than 65 ℃ to less than 95 ℃, it is judged as appropriate, and if it is 95 ℃ or more, it is judged to be high.

When it is determined that the coolant temperature is low, the electronic control unit 60 closes the first valve 49a of the flow control valve 40 toward the first partition wall 45 toward the first flow hole as shown in FIG. 3 . (45a) is cut off, the second valve (49b) is brought into close contact with the second bulkhead (46) to block the second flow path hole (46a), and the water pump (50) is operated at high speed.

Therefore, the first passage hole 45a and the second passage hole 46a are completely blocked, so that no mixing is made between the supply flow and the return flow, and the supply flow and the return flow are respectively separated from the third flow hole 47a and the third flow passage hole 47a. It flows toward the heater core 20 and the engine 10 through the fourth passage hole 48a. At this time, since the water pump 50 operates at high speed, the flow rate of the coolant supplied from the engine 10 to the heater core 20 is reduced. is greatly increased Since the amount of heat supplied to the heater core 20 is increased by the increase in the flow rate of the coolant, the temperature of the air passing through the heater core 20 can be increased. That is, even when the temperature of the cooling water is low, the temperature of the indoor discharge air may be maintained at a constant level.

When the electronic control unit 60 determines that the coolant temperature is appropriate, as shown in FIG. 4 , the electronic control unit 60 connects the first valve 49a of the flow control valve 40 to the first partition wall 45 and the third partition wall 47 . All the channel holes 45a, 46a, 47a, 48a are opened by placing the second valve 49b in the middle part between the second partition wall 46 and the fourth partition wall 48, The water pump 50 is operated at medium speed.

Accordingly, the supply flow and the return flow are respectively supplied to the heater core 20 through the third passage hole 47a and the fourth passage hole 48a and returned to the engine 10, and in such a state, the first passage hole ( 45a) and a predetermined amount of mixing may be performed through the second passage hole 46a (indicated by a dotted line).

At this time, since the operating speed of the water pump 50 is also maintained at a medium speed, the coolant flow rate supplied from the engine 10 to the heater core 20 is maintained at an intermediate level, and the amount of heat supplied in proportion to the coolant flow rate is also maintained at an appropriate level. Therefore, when the coolant temperature is in an appropriate range, the amount of heat supplied to the heater core 20 can be maintained at an appropriate level by controlling the flow control valve 40 and the water pump 50 as described above, and thus the heater core 20 ) and the temperature of the air discharged into the room after heat exchange can be maintained at an appropriate level.

Meanwhile, when it is determined that the engine coolant temperature is appropriate, the speed of the water pump 50 may be adjusted in association with the operations of the first valve 49a and the second valve 49b. That is, the opening amount of the first valve 49a and the second valve 49b can be increased or decreased. When the opening amount increases, the supply flow rate and heat amount to the heater core 20 increase, and when the opening amount decreases, the amount of heat supplied to the heater core 20 The supply flow rate and the amount of heat decrease. (The opening degree increases when the first valve 49a rotates toward the first partition wall 45 to further activate the flow to the third flow path hole 47a, and the second valve 49b ) moves toward the second partition wall 46 to further activate the flow to the fourth passage hole 48a to increase the opening amount.)

Therefore, when adjusting the opening amount of the first valve 49a and the second valve 49b in a direction to increase, the operating speed of the water pump 50 is reduced in conjunction with this, and the first valve 49a and the second valve 49b. When adjusting in the direction of decreasing the opening degree of (49b), the operating speed of the water pump 50 is increased in conjunction with this. Since the operating speed of the water pump 50 and the coolant flow rate and heat quantity supplied to the heater core 20 are proportional to each other, the above control is possible.

When the electronic control unit 60 determines that the coolant temperature is high, as shown in FIG. 5 , the electronic control unit 60 brings the first valve 49a of the flow control valve 40 close to the third partition wall 47 to the third passage hole. (47a) is finely opened, the second valve (49b) is brought close to the fourth partition wall (48), the fourth passage hole (48a) is finely opened, and the water pump (50) is operated at a low speed.

At this time, since the third passage hole 47a and the fourth passage hole 48a are finely opened (almost blocked), the coolant flow (indicated by a dotted line) through them is insignificant, whereas the first passage hole 45a that is completely open and the cooling water flow through the second passage hole 46a is active. Accordingly, most of the supply flow flowing into the flow control valve 40 from the engine 10 is bypassed through the first flow hole 45a and returned to the engine 10 , and the flow rate control from the heater core 20 . Most of the return flow flowing into the valve 40 is supplied back to the heater core 20 through the second passage hole 46a.

That is, since most of the coolant discharged from the heater core 20 is returned to the engine 10 and re-supplied to the heater core 20 without reheating, the amount of heat supplied to the heater core 20 is greatly reduced. Accordingly, since the temperature of the air discharged after heat exchange with the heater core 20 can also be greatly reduced, the temperature of the air discharged into the room can be maintained at an appropriate level even if the temperature of the cooling water is excessively increased.

As described above, according to the cooling water flow control apparatus of the vehicle heating apparatus according to the present invention, it is possible to manage the temperature of the heating discharge air at an appropriate level without being greatly affected by the cooling water temperature.

Therefore, since the temperature of the indoor discharge air does not rise excessively, the deformation of the duct or vent grill due to the high-temperature air discharge is prevented, and in particular, it is possible to prevent burns on the feet of passengers during foot mode heating. can

Now, a method for controlling the coolant flow rate of the heating device for a vehicle according to the present invention will be described.

Since the cooling water flow rate control method of the vehicle heating device according to the present invention is a cooling water flow rate control method using the cooling water flow rate control device of the vehicle heating device described above, in the following description of the control method, the drawings referenced when the control device is described and the drawing numbers indicated therein are the same. to be cited and used.

As shown in FIG. 6 , the method for controlling the coolant flow rate of a heating device for a vehicle according to the present invention includes a coolant temperature sensing step (S10), a coolant temperature determining step (S20), a coolant flow rate upward adjustment step (S30), and the coolant It includes a flow rate maintenance step (S40) and a cooling water flow rate downward adjustment step (S50).

The cooling water temperature sensing step S10 is a step of receiving a cooling water temperature measurement value from the cooling water temperature sensor 70 . The coolant temperature sensing step S10 is always performed without interruption while the engine 10 is operating.

In the coolant temperature determination step (S20), the coolant temperature detected in the coolant temperature detection step (S10) is compared with an appropriate coolant temperature range (over 65°C to less than 95°C), and if it is lower than the appropriate coolant temperature range, the current coolant temperature is lower If it is within the appropriate cooling water temperature range, it is determined that the current cooling water temperature is appropriate, and if it is higher than the appropriate cooling water temperature range, it is determined that the current cooling water temperature is high.

If it is determined that the cooling water temperature is low in the cooling water temperature determination step S20, the cooling water flow rate upward adjustment step S30 is performed.

In the cooling water flow rate upward adjustment step (S30), the first valve 49a of the flow control valve 40 is brought into close contact with the first partition wall 45 to block the first flow hole 45a, and the second valve 49b is closed. The second partition wall 46 is brought into close contact to block the second passage hole 46a, and the water pump 50 is operated at high speed.

Accordingly, all of the supply flow flows toward the heater core 20 through the third passage hole 47a, and all of the return flow flows toward the engine 10 through the fourth passage hole 48a. At this time, since the water pump 50 is operated at high speed, the flow rate of the coolant supplied from the engine 10 to the heater core 20 is greatly increased, so that the amount of heat supplied to the heater core 20 increases, so that air passing through the heater core 20 is increased. can increase the temperature of Therefore, even when the temperature of the cooling water is low, the temperature of the air discharged into the room can be maintained at a certain level.

When it is determined that the coolant temperature is appropriate in the coolant temperature determination step (S20), the coolant flow rate maintenance step (S40) is performed.

In the cooling water flow rate maintenance step (S40), all the flow path holes 45a, 46a, 47a, 48a are opened by adjusting both the first valve 49a and the second valve 49b of the flow control valve 40 to an intermediate opening degree, and , the water pump 50 is operated at medium speed.

Accordingly, the supply flow is normally supplied through the third passage hole 47a, and the return flow is normally returned through the fourth passage hole 48a, and in such a state, the first passage hole 45a and the second passage hole ( 46a), a predetermined amount of mixing may be achieved.

In this state, since the operating speed of the water pump 50 is maintained at medium speed, the coolant flow rate supplied from the engine 10 to the heater core 20 is maintained at an intermediate amount that is not large or small, and accordingly, the heater core 20 ) is also maintained at an appropriate level. Accordingly, the temperature of the air discharged into the room after heat exchange with the heater core 20 can be maintained at an appropriate level.

Meanwhile, when it is determined that the engine coolant temperature is appropriate, the speed of the water pump 50 may be adjusted in association with the operations of the first valve 49a and the second valve 49b. That is, when the opening amount of the first valve 49a and the second valve 49b is increased, the operating speed of the water pump 50 is reduced in association with this, and the first valve 49a and the second valve 49b are closed. When the opening degree is reduced, the operating speed of the water pump 50 is increased in conjunction with this.

When the opening amount of the first valve 49a and the second valve 49b increases (increasing the opening amount of the first valve 49a) means that the supply flow through the third passage hole 47a increases, and the second An increase in the opening degree of the valve 49b means that the return flow through the fourth flow path hole 48a increases.) The supply flow rate to the heater core 20 and the return flow rate to the engine 10 increase.

That is, since the increase in the opening amount of the first valve 49a and the second valve 49b means that the amount of heat supplied to the heater core 20 within the same time increases due to an increase in the coolant circulation flow rate, the heater core 20 . The operating speed of the water pump 50 is reduced in order to properly maintain the calorie level of the . )

Conversely, when the opening amounts of the first valve 49a and the second valve 49b are decreased, the operation speed of the water pump 50 may be controlled to increase.

If it is determined that the coolant temperature is high in the cooling water temperature determination step S20, a cooling water flow rate downward adjustment step S50 is performed.

In the cooling water flow rate downward adjustment step (S50), the first valve 49a of the flow control valve 40 is brought close to the third partition wall 47 to finely open the third flow path hole 47a, and the second valve 49b close to the fourth partition wall 48 to finely open the fourth passage hole 48a, and the water pump 50 is operated at a low speed.

Accordingly, the flow of coolant through the third flow hole 47a and the fourth flow hole 48a is insignificant, and the coolant flow through the first flow hole 45a and the second flow hole 46a is active.

Accordingly, most of the supply flow flowing into the flow control valve 40 from the engine 10 is bypassed through the first flow hole 45a and returned to the engine 10 , and the flow rate control from the heater core 20 . Most of the return flow flowing into the valve 40 is supplied back to the heater core 20 through the second passage hole 46a.

Accordingly, most of the coolant discharged from the heater core 20 is not reheated in the engine 10 and is re-supplied to the heater core 20 , so that the amount of heat supplied to the heater core 20 is greatly reduced.

Accordingly, since the temperature of the discharged air after heat exchange with the heater core 20 is greatly reduced, the indoor discharge air temperature can be maintained at an appropriate level even if the cooling water temperature is excessively increased.

According to the method for controlling the coolant flow rate of the heating apparatus for a vehicle according to the present invention as described above, even when the temperature of the coolant discharged from the engine changes, the temperature of the heating discharge air can be maintained within an appropriate predetermined range.

Accordingly, since the temperature of the indoor discharge air does not rise excessively, deformation of the duct and vent grill due to the high temperature discharge air is prevented, and in particular, it is possible to protect the feet of passengers from heat damage during foot mode heating.

As described above, the present invention has been described with reference to the embodiment shown in the drawings, but this is only exemplary, and various modifications and equivalent other embodiments may be made by those skilled in the art to which the art pertains. You will understand that it is possible. Therefore, the true technical protection scope of the present invention should be defined by the following claims.

10: engine 20: heater core
31,32,33,34: cooling water circulation line 40: flow control valve
41: supply cooling inlet 42: supply cooling outlet
43: return cooling inlet 44: return cooling outlet
45: first bulkhead 45a: first flow hole
46: second bulkhead 46a: second flow hole
47: third bulkhead 47a: third flow hole
48: fourth bulkhead 48a: fourth flow hole
49a: first valve 49b: second valve
50: water pump 60: electronic control unit
70: coolant temperature sensor

Claims (11)

Cooling water circulation connecting between the engine 10 and the heater core 20 so that both the coolant supply flow from the engine 10 to the heater core 20 and the coolant return flow from the heater core 20 to the engine 10 pass through A flow control valve 40 connected to the pipelines 31, 32, 33, and 34 and having a first valve 49a and a second valve 49b for controlling the paths of the cooling water supply flow and the cooling water return flow; ;
an electric water pump (50) installed in the inlet pipe (32) on the heater core side of the cooling water circulation pipe (31, 32, 33, 34);
An electronic control unit (60) that receives coolant temperature information from the coolant temperature sensor (70) and controls the operation of the flow control valve (40) and the water pump (50) according to the coolant temperature
including,
The flow control valve 40 has an internal space defined by a first partition wall 45 , a second partition wall 46 , a third partition wall 47 , and a fourth partition wall 48 , and a first flow path is provided in the partition walls. A hole 45a, a second passage hole 46a, a third passage hole 47a, and a fourth passage hole 48a are formed, respectively,
A supply cooling inlet 41 is formed in the space between the first bulkhead 45 and the third bulkhead 47 , and a supply cooling outlet 42 is formed in the space between the third bulkhead 47 and the second bulkhead 46 . is formed, a return cooling inlet 43 is formed in the space between the second bulkhead 46 and the fourth bulkhead 48 , and return coolant is formed in the space between the fourth bulkhead 48 and the first bulkhead 45 . An outlet 44 is formed,
The first valve 49a opens and closes the first passage hole 45a and the third passage hole 47a while rotating between the first partition wall 45 and the third partition wall 47, and the second valve 49b Opening and closing the second passage hole 46a and the fourth passage hole 48a while rotating between the second partition wall 46 and the fourth partition wall 48,
When it is determined that the coolant temperature is within the appropriate temperature range, the electronic control unit 60 controls the first valve 49a of the flow control valve 40 in the middle between the first partition wall 45 and the third partition wall 47 . part and the second valve 49b is positioned in the middle part between the second partition wall 46 and the fourth partition wall 48 to open all the flow path holes 45a, 46a, 47a, 48a, and the water pump ( 50) at medium speed,
The first valve 49a is rotated toward the first partition wall 45 to move in the direction of blocking the first flow hole 45a and in the direction of opening the third flow hole 47a, and the second valve 49b When it is rotated toward the second partition wall 46 and moved in a direction to block the second passage hole 46a and to open the fourth passage hole 48a, the operating speed of the water pump 50 is reduced,
The first valve 49a is rotated toward the third partition wall 47 to move in the direction of blocking the third flow hole 47a and in the direction of opening the first flow hole 45a, and the second valve 49b When it is rotated toward the fourth bulkhead 48 and moved in the direction to block the fourth flow path hole 48a and to open the second flow path hole 46a, the vehicle heating device increases the operating speed of the water pump 50. Coolant flow control. delete The method according to claim 1,
When it is determined that the coolant temperature is lower than the appropriate temperature range, the electronic control unit 60 closes the first valve 49a of the flow control valve 40 toward the first partition wall 45 toward the first flow hole 45a. is closed, the second valve 49b is brought into close contact with the second bulkhead 46 to block the second flow path hole 46a, and the water pump 50 is operated at high speed. flow control. delete delete The method according to claim 1,
When it is determined that the coolant temperature is higher than the appropriate temperature range, the electronic control unit 60 closes the first valve 49a of the flow control valve 40 to the third partition wall 47 to form a third passage hole 47a. A heating device for a vehicle, characterized in that the second valve 49b is brought close to the fourth bulkhead 48 to finely open the fourth flow path hole 48a, and the water pump 50 is operated at a low speed. of cooling water flow control device. A cooling water temperature sensing step (S10) of receiving a cooling water temperature measurement value from the cooling water temperature sensor 70;
A coolant temperature determination step (S20) of comparing the measured coolant temperature with a set appropriate coolant temperature range;
When it is determined that the coolant temperature is low in the coolant temperature determination step (S20), the coolant flow rate upward adjustment step (S30) of increasing the coolant flow rate supplied to the heater core 20;
When it is determined that the coolant temperature is appropriate in the coolant temperature determination step (S20), a coolant flow rate maintenance step (S40) of maintaining the coolant flow rate supplied to the heater core 20;
When it is determined that the coolant temperature is high in the coolant temperature determination step (S20), a coolant flow rate downward adjustment step (S50) of reducing the coolant flow rate supplied to the heater core (20)
including,
An internal space of the flow control valve 40 is partitioned by a first partition wall 45 , a second partition wall 46 , a third partition wall 47 , and a fourth partition wall 48 , and a first flow hole is formed in the partition walls. (45a), the second passage hole (46a), the third passage hole (47a), the fourth passage hole (48a) is formed, respectively,
A supply cooling inlet 41 is formed in the space between the first bulkhead 45 and the third bulkhead 47 , and a supply cooling outlet 42 is formed in the space between the third bulkhead 47 and the second bulkhead 46 . is formed, a return cooling inlet 43 is formed in the space between the second bulkhead 46 and the fourth bulkhead 48 , and return coolant is formed in the space between the fourth bulkhead 48 and the first bulkhead 45 . An outlet 44 is formed,
The first valve 49a opens and closes the first passage hole 45a and the third passage hole 47a while rotating between the first partition wall 45 and the third partition wall 47, and the second valve 49b Opening and closing the second passage hole 46a and the fourth passage hole 48a while rotating between the second partition wall 46 and the fourth partition wall 48,
In the cooling water flow rate maintenance step (S40), all the flow path holes 45a, 46a, 47a, 48a are opened by adjusting both the first valve 49a and the second valve 49b of the flow control valve 40 to an intermediate opening degree. and operate the water pump 50 at medium speed,
The first valve 49a is rotated toward the first partition wall 45 to move in the direction of blocking the first flow hole 45a and in the direction of opening the third flow hole 47a, and the second valve 49b When it rotates toward the second partition wall 46 and moves in a direction to block the second flow path hole 46a and to open the fourth flow path hole 48a, the operating speed of the water pump 50 is reduced,
The first valve 49a is rotated toward the third partition wall 47 to move in the direction of blocking the third flow hole 47a and in the direction of opening the first flow hole 45a, and the second valve 49b When it is rotated toward the fourth bulkhead 48 and moved in a direction to block the fourth flow path hole 48a and to open the second flow path hole 46a, the heating device for a vehicle increases the operating speed of the water pump 50. Coolant flow control method. 8. The method of claim 7,
In the cooling water flow rate upward adjustment step (S30), the first valve 49a of the flow control valve 40 is brought into close contact with the first bulkhead 45 to block the first flow hole 45a, and the second valve 49b. A method for controlling the flow rate of cooling water for a vehicle heating apparatus, characterized in that close contact with the second partition wall (46) to block the second passage hole (46a), and operating the water pump (50) at high speed. delete delete 8. The method of claim 7,
In the cooling water flow rate downward adjustment step (S50), the first valve 49a of the flow control valve 40 is brought close to the third partition wall 47 to finely open the third flow path hole 47a, and the second valve 49b ) close to the fourth partition wall (48) to finely open the fourth passage hole (48a), and the water pump (50) is operated at a low speed.

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