KR20120131656A - Flow Control Valve And Air conditioner for Vehicle using the same - Google Patents

Abstract

PURPOSE: A flow control valve and an air conditioning device for a vehicle using the same are provided to flexibly cope even when a piston is contracted or expanded by the temperature variation of cooling water by installing a piston ring with a cutting part on the exterior of the piston, thereby maintaining more sealed state. CONSTITUTION: A flow control valve comprises a valve body(210), a supply port(211), a collecting port(212), an outlet port(213), an inlet port(214), and a direction changing valve(220). The outlet port circulates cooling water in a first cooling water passage(216) or a second cooling water passage(217) to a heater core according to the air conditioning mode. The inlet port discharges the cooling water circulating the heater core to the first cooling water passage or the second cooling water passage. The direction changing valve is slidingly installed in the second cooling water passage and changes the flowing direction of the cooling water flowing into the second cooling water passage.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flow control valve,

The present invention relates to a flow control valve and a vehicle air conditioner using the same, and more particularly, by installing a piston-type direction switching valve inside a flow control valve installed on a pipe connecting the heater core and the cooling water supply means. It relates to a flow rate control valve and a vehicle air conditioner using the same to switch the flow direction of the.

Generally, the air conditioner for a vehicle is an automobile interior which is installed for the purpose of securing the front and rear view of the driver by removing the casting which is to be cooled or heated in the summer or winter season, or in case of rain or windshield during rainy or winter season Such an air conditioner is usually equipped with a heating device and a cooling device at the same time, and selectively introduces outside air or indoor air, and then the air is heated or cooled to blow air into the inside of the vehicle.

According to the independent structure of the blower unit, the evaporator unit, and the heater core unit, the air conditioner includes a three piece type in which the three units are independently provided, and an evaporator unit and the heater core unit in the air conditioning case. The semi-center type, which is built-in and the blower unit is provided as a separate unit, and the center mounting type, in which all three units are built in the air conditioning case, can be roughly classified.

Recently, in order to protect the environment and improve the fuel efficiency of the vehicle engine, a vehicle (hybrid vehicle or electric vehicle) that automatically stops the engine (or the driving motor) at the time of stopping such as a traffic signal is put into practical use.

However, in the air conditioner, the compressor (not shown) constituting the refrigeration cycle is driven by a vehicle engine (or a driving motor). In the hybrid vehicle or the electric vehicle described above, In this case, the temperature of the evaporator for cooling increases in the summer, and the temperature of the air discharged into the vehicle interior also rises sharply, giving a bad feeling to the occupant.

1, the cooling and cooling apparatus 1 is provided with an air blowing device 20 at its inlet side and a mode door (not shown) at its outlet side, respectively. The evaporator 2 and the heater 12 which are incorporated in the air conditioning case 10 are provided with the defrost vent 12a, the face vent 12b and the floor vent 12c, A core (3); And a temperature control door (15) installed between the evaporator (2) and the heater core (3) and adjusting the mixing amount of the cold air and the warm air to adjust the temperature.

The inlet and outlet pipes 4 connected to the heater core 3 are provided with a flow control valve 5 for controlling the flow rate of cooling water supplied to the heater core 3, The cooling water is circulated to the heater core 3 and the supply of the cooling water is interrupted in the cooling mode.

In the cooling mode, the cooling water stagnated inside the heater core 3 is used as the axial coolant. That is, in the cooling mode, some of the cold cool air passing through the evaporator 2 is directly discharged into the passenger compartment, Passes through the heater core 3 and heat-exchanges with the cooling water in the heater core 3 to cool (cool) the cooling water.

When the engine is stopped, the air passing through the evaporator 2, which has stopped operating, passes through the heater core 3 to heat-exchange the coolant in the heater core 3, The cold air can be continuously supplied to the passenger compartment even when the passenger is stopped, thereby preventing the passenger from feeling uncomfortable.

The flow control valve 5 includes a valve body 51 having a plurality of cooling water outlets 52 formed therein and a valve body 51 rotatably installed inside the valve body 51 to be supplied into the valve body 51 And a direction switching valve 60 for switching the flow direction of the cooling water.

Four partition walls 55, 56, 57 and 58 for dividing the interior of the valve body 51 into four equal parts are formed in the valve body 51. The four partition walls 55, 56, 57, Through holes 55a, 56a, 57a and 58a are formed so as to allow the cooling water to pass therethrough, respectively.

In addition, the directional control valve 60 is formed as a flat type door, and two diagonally arranged valve bodies 51 are disposed inside the valve body 51.

Therefore, as shown in FIG. 2, in the maximum cooling mode, by closing the through holes 55a and 56a of the two partition walls 55 and 56 having the two directional control valves 60 vertically formed, The cooling water is not supplied to the heater core 3 and is returned in the valve body 51 and circulated back to the engine. At this time, the cooling water on the heater core 3 is circulated through a separate water pump (not shown).

The hot water supplied from the engine is supplied to the heater core 3 by closing the through holes 57a and 58a of the two partitioning walls 57 and 58 in which the two directional control valves 60 are horizontally formed, And then circulated to the engine.

One directional control valve 60 of the two directional control valves 60 closes the through hole 58a of one horizontal partition wall 58 and the other one of the directional control valves 60 A part of the hot cooling water supplied from the engine is returned in the valve body 51 and is returned to the engine 51 by opening both the through hole 57a of the other one horizontal partition 57 and the through hole 56a of the vertical partition 56 And some of them pass through the heater core 3 and then circulate to the engine.

However, the conventional flow control valve (5), through the door closing, closing method using the directional valve 60, each through-hole (55a, 56a, 57a, 58a) in the valve body (51). Due to the opening and closing, there is a problem of changing the position while the direction switching valve 60 is pushed by the cooling water pressure flowing through the inside of the valve body 51, which is difficult to maintain the airtight, there was a problem in the implementation of accurate air conditioning mode .

An object of the present invention for solving the above problems is to install a piston-type direction switching valve inside the flow control valve installed on the pipe connecting the heater core and the cooling water supply means to switch the flow direction of the cooling water Even if the coolant pressure is applied, the position of the directional valve is not changed, so it is possible to maintain airtightness. Therefore, it is possible to realize an accurate air conditioning mode. Also, by installing a piston ring having a cutout on the outer circumferential surface of the piston, The present invention provides a flow control valve and a vehicle air conditioner using the same, which can be flexibly maintained even when contracting or expanding.

The present invention for achieving the above object is a flow rate control valve installed on a pipe connecting the vehicle heater core and the cooling water supply means to switch the flow direction of the cooling water, the partition formed therebetween the first side A first coolant passage and a second coolant passage are formed at the other side, and both ends of the second coolant passage are formed in communication with the first coolant passage, and are formed on an outer surface of the valve body and are supplied from the coolant supply means. A supply port for supplying cooling water to a second cooling water passage, an outer side surface of the valve body, a recovery port for recovering the cooling water in the second cooling water passage to the cooling water supply means, and an outer side surface of the valve body. Outlet port for circulating the coolant in the first coolant passage or the second coolant passage to the heater core according to an air conditioning mode And an inlet port formed on an outer surface of the valve body to discharge coolant circulated through the heater core into the first coolant passage or the second coolant passage according to an air conditioning mode, and slidably installed in the second coolant passage. And it is characterized in that it comprises a direction switching valve for switching the flow direction of the cooling water flowing into the second cooling water passage.

In addition, an air inlet is formed on one side and a plurality of air outlets are formed on the other side, the evaporator and the heater core are sequentially spaced apart at regular intervals along the air flow direction inside the air conditioning case, the heater core and The flow rate control valve according to any one of claims 1 to 7, which is installed on a pipe connecting the cooling water supply means and switches the flow direction of the cooling water circulating in the pipe in accordance with an air conditioning mode, and the flow rate control. It is characterized in that it comprises a water tank for installing a valve and the circulation path for circulating the heater core, respectively, and a water tank for storing a certain amount of cooling water and circulating the cooling water.

The present invention, by installing a piston-type direction switching valve inside the flow control valve provided on the pipe connecting the heater core and the cooling water supply means to change the flow direction of the cooling water, even if the cooling water pressure is applied Since the position has not changed, confidentiality is possible, which enables accurate air conditioning mode.

In addition, by installing a piston ring having a cutout on the outer circumferential surface of the first and second pistons, the first and second pistons may be flexibly moved even if the first and second pistons contract or expand due to the ambient temperature change as well as the temperature change of the cooling water flowing in the valve body. Correspondence is possible to maintain confidentiality.

1 is a cross-sectional view showing a conventional axial cooling /
FIG. 2 is a view showing the flow control valve of FIG. 1 for each air conditioning mode,
3 is an exploded perspective view showing a flow control valve according to the present invention;
4 is a perspective view showing a direction switching valve in FIG.
5 is a cross-sectional view taken along the line AA of FIG.
6 is a configuration diagram showing a cooling mode of a vehicle air conditioner according to the present invention;
7 is a configuration diagram showing a heating mode of a vehicle air conditioner according to the present invention;
8 is a configuration diagram showing a temperature control mode of the automotive air conditioner according to the present invention.
9 is a perspective view showing a vehicle air conditioner according to the present invention,
10 is a sectional view showing the maximum cooling mode in the vehicle air conditioner according to the present invention,
11 is a cross-sectional view showing the engine stopping mode in the maximum cooling mode in the vehicle air conditioner according to the present invention,
12 is a sectional view showing the maximum heating mode in the automotive air conditioner according to the present invention,
FIG. 13 is a cross-sectional view showing the engine stoppage during the maximum heating mode in the automotive air conditioning system according to the present invention,
14 is a sectional view showing a temperature control mode in the automotive air conditioning system according to the present invention.

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

First, the flow rate control valve 200 according to the present invention is installed on a pipe connecting the vehicle heater core 120 and the coolant supply means 170 to switch the flow direction of the coolant, and the valve body 210 and In addition, the valve body 210 includes a plurality of coolant inlets and outlets, and first and second pistons 221 and 222, each of which includes a direction switching valve 220 for switching the flow direction of the coolant.

The valve body 210 has a first cooling water passage 216 on one side and a second cooling water passage 217 on the other side with the partition wall 215 formed therebetween.

At this time, both ends of the second coolant passage 217 are formed in communication with the first coolant passage 216.

In addition, the second cooling water passage 217 has a passage portion in which the first piston 221 slides and a passage portion in which the second piston 222 slides at right angles.

That is, the second coolant passage 217 is formed at 90 degrees along the inner edge of the valve body 210, and the partition wall 215 is formed to surround the first and second pistons 221 and 222. , 2 supports the sliding operation of the pistons (221, 222).

At this time, the cross-sectional shape of the second cooling water passage 217 is formed in a circular shape.

On the other hand, the lower portion of the valve body 210 is closed, the upper portion is formed to be open to install the direction switching valve 220. At this time, the cover 240 is detachably coupled to the open upper portion of the valve body 210.

That is, after installing the direction change valve 220 in the valve body 210, the cover 240 is coupled to the upper portion of the valve body 210 to be sealed.

The plurality of coolant inlets and outlets are formed on the outer surface of the valve body 210 to communicate with the inside of the valve body 210. The supply port 211, the recovery port 212, and the outlet port 213 are provided. ), And an inlet port 214.

The supply port 211 is formed on the outer surface of the valve body 210 to supply the coolant supplied from the coolant supply means 170 to the second coolant passage 217.

In this case, the supply port 211 is formed at a right angle with respect to the passage in which the first piston 221 slides in the second cooling water passage 217.

The recovery port 212 is formed on the outer surface of the valve body 210 to recover the coolant in the second coolant passage 217 to the coolant supply means 170.

The recovery port 212 is formed parallel to the supply port 211 spaced apart at a predetermined interval, wherein the recovery port 212 is the supply port 211 and the inlet port (217) in the second cooling water passage (217) 214 is formed between.

The outlet port 213 is formed on the outer surface of the valve body 210 to cool the water in the first coolant passage 216 or the second coolant passage 217 according to the air conditioning mode to the heater core 120. Will be cycled.

That is, the outlet port 213 circulates the cooling water in the first cooling water passage 216 to the heater core 120 in the maximum cooling mode, and the second cooling water passage 217 in the maximum heating mode and the temperature control mode. The coolant in the circulating is circulated to the heater core 120.

In this case, the outlet port 213 is formed in a direction perpendicular to the supply port 211, and is formed concentrically with the first piston 221.

The inlet port 214 is formed on the outer surface of the valve body 210 to the cooling water circulated in the heater core 120 according to the air conditioning mode, the first coolant passage 216 or the second coolant passage 217 Will be discharged into).

That is, the inlet port 214 discharges the coolant circulated through the heater core 120 into the first cooling water passage 216 in the maximum cooling mode, and the heater core (in the maximum heating mode and the temperature control mode). Cooling water circulated through 120 is discharged into the second cooling water passage 217.

In this case, the inlet port 214 is formed in a direction perpendicular to the recovery port 212, it is formed at a right angle with respect to the passage in which the second piston 222 sliding in the second cooling water passage (217).

The plurality of coolant outlet sweep holes are formed in the order of the outlet port 213, the supply port 211, the recovery port 212, and the inlet port 214 in the clockwise direction on the outer surface of the valve body 210.

The supply port 211 and the recovery port 212 are connected to the cooling water supply means 170. The outlet port 213 is connected to the inlet pipe 121 of the heater core 120, The port 214 is connected to the outlet pipe 122 of the heater core 120.

On the other hand, the cooling water supply means 170 is a device for circulating the cooling water in the vehicle. That is, it may be a device for circulating cooling water for cooling the engine, or a device for circulating cooling water for cooling a hybrid vehicle, an electric vehicle, a motor, a battery or an electric device.

The direction switching valve 220 is slidably installed in the second coolant passage 217 and switches the flow direction of the coolant flowing into the second coolant passage 217.

The direction switching valve 220 is slidably installed in the second cooling water passage 217 in which the supply port 211 is located to control the flow direction of the cooling water supplied through the supply port 211. A second piston 222 that is slidably installed in the piston 221 and the second cooling water passage 217 in which the inlet port 214 is located to adjust the flow direction of the cooling water flowing through the inlet port 214. Is done.

That is, the first piston 221 is sliding in a direction perpendicular to the supply port 211 in the second cooling water passage 217,

In the maximum cooling mode to close the passage toward the outlet port 213 to the supply port 211 to adjust the direction so that the cooling water supplied through the supply port 211 flows to the recovery port 212,

In the maximum heating mode to close the passage toward the recovery port 212 with respect to the supply port 211 to adjust the direction so that the cooling water supplied through the supply port 211 flows to the outlet port 213,

In the temperature control mode, the cooling water supplied through the supply port 211 is positioned to overlap the supply port 211 and opens all the passages toward the outlet port 213 and the recovery port 212 with respect to the supply port 211. Some of the flow to the recovery port 212 and some to adjust the direction to flow to the outlet port (213).

The second piston 222 slides in a direction perpendicular to the inlet port 214 in the second cooling water passage 217.

In the maximum cooling mode, the passage toward the recovery port 212 is closed with respect to the inlet port 214 to adjust the direction so that the coolant supplied through the inlet port 214 flows to the first coolant passage 216.

In the maximum heating mode, the passage toward the first cooling water passage 216 is closed with respect to the inlet port 214, and the cooling water supplied through the inlet port 214 flows to the recovery port 212.

In the temperature control mode, the coolant circulating in the heater core 120 is adjusted to be located at the same position as the maximum heating mode so that the cooling water flows to the recovery port 212.

In addition, piston rings 223 are coupled to outer circumferential surfaces of the first and second pistons 221 and 222 to improve sealing performance. In this case, coupling grooves 221a are formed on outer circumferential surfaces of the first and second pistons 221 and 222 to couple the piston ring 223 to each other.

In addition, the piston ring 223 has a cutout portion 223a formed at one side thereof so as to be able to flexibly respond to contraction or expansion of the first and second pistons 221 and 222.

Therefore, not only the temperature change of the cooling water flowing in the valve body 210 but also the fluid can respond to the change in the surrounding temperature can be kept airtight.

On the other hand, it is preferable that the piston ring 223 is made of a material having a certain elasticity, and one side of the piston ring 223 is cut by the cutout 223a, but the cutout 223a is used. Since the width of is very small, no leakage occurs through the cutout 223a, and even if the leakage occurs, the amount is very small and can be ignored and does not affect performance.

In addition, an actuating means 230 is installed in the valve body 210 to operate the first and second pistons 221 and 222, respectively.

The actuating means 230 may include a guide shaft 231 formed at end portions of the first and second pistons 221 and 222, and a rack size formed on the guide shafts 231 of the first and second pistons 221 and 222. A gear 232, a pinion gear 233 rotatably installed in the second cooling water passage 217, and engaged with the rack gear 232 of the guide shaft 231, and the valve body 210. It is installed on the outer surface of the) comprises an actuator 234 for rotating the pinion gear 233.

The guide shaft 231 is formed at the centers of both ends of the first and second pistons 221 and 222 to protrude a predetermined length.

Therefore, the support 218 is formed on the inner circumferential surface of the second coolant passage 217 to slidably support the guide shaft 231.

One end of the pinion gear 233 protrudes outward from the valve body 210 and is connected to the actuator 234.

Accordingly, when the actuator 234 is operated, the pinion gear 233 rotates, and at the same time, the guide shaft 231 engaged with the pinion gear 233 and the rack gear 232 in the axial direction. As it moves, the first and second pistons 221 and 222 change the flow direction of the coolant while reciprocating the inside of the second coolant passage 217 before and after.

The operating means 230, the first piston 221 and the second piston 222 to be operated independently of each other are installed two.

On the other hand, the structure of the operation means 230 has been described an example, it can be used a variety of methods for reciprocating the first and second pistons (221, 222).

In this way, by installing a piston type direction switching valve 220 in the valve body 210 of the flow control valve 200 to change the flow direction of the coolant, even if the coolant pressure is applied to the direction change valve 220 It is possible to maintain the airtight without changing the position of the can realize a precise air conditioning mode, and also by installing the piston ring 223 having a cutout on the outer peripheral surface of the piston by the temperature change of the coolant to shrink or expand the piston It is possible to respond flexibly to this to maintain the confidentiality.

FIG. 9 is a perspective view showing a vehicle air conditioner according to the present invention, FIG. 10 is a cross-sectional view showing a maximum cooling mode in the vehicle air conditioner according to the present invention, Fig. 12 is a cross-sectional view showing the maximum heating mode in the automotive air conditioner according to the present invention, Fig. 13 is a sectional view showing the engine stopping time in the maximum heating mode in the automotive air conditioner according to the present invention, 14 is a sectional view showing a temperature control mode in the automotive air conditioner according to the present invention.

The air conditioner 100 includes an air inlet 111 formed at one side thereof, a plurality of air outlet openings formed at the other side thereof, and an air passage for communicating the air inlet 111 with a plurality of air discharge openings. (110), an evaporator (104) installed on the air passage inside the air conditioning case (110) and spaced apart from the air flow direction in order and circulating the refrigerant of the air conditioning system, and a heater core (120).

Here, the air conditioning system includes a compressor 101, a condenser 102, an expansion valve 103, and an evaporator 104 connected to a refrigerant pipe 105. In the cooling mode, The air passing through the evaporator 104 undergoes heat exchange with the coolant in the evaporator 104 to cool the refrigerant in the evaporator 104. The refrigerant is circulated through the compressor 101, the condenser 102, the expansion valve 103 and the evaporator 104, The air is discharged through the air outlet of the air conditioning case 110 to the inside of the vehicle and cooled.

In addition, an air inlet 111 of the air conditioning case 110 is provided with a blower (not shown) for blowing inside or outside air.

The plurality of air outlets are opened and closed by mode doors 113, respectively.

A bypass passage 131 is formed in the air conditioning case 110 at one side of the heater core 120 so that a part of the air passing through the evaporator 104 bypasses the heater core 120, A bypass door (130) is provided to adjust the opening of the bypass passage (131).

At this time, the bypass passage 131 is formed on the upper side of the heater core 120.

Meanwhile, although the bypass passage 131 and the bypass door 130 may be omitted, the case where the bypass passage 131 and the bypass door 130 are installed will be described as an example.

And, on the pipe connecting the heater core 120 and the cooling water supply means 170 is provided with a flow rate control valve 200 for switching the flow direction of the cooling water circulating the pipe in accordance with the air conditioning mode.

Since the detailed configuration of the flow control valve 200 has been described above, detailed description thereof will be omitted.

The supply port 211 and the recovery port 212 of the flow control valve 200 is connected to the cooling water supply means 170, the outlet port 213 and the inlet pipe 121 of the heater core 120 The inlet port 214 is connected to the outlet pipe 122 of the heater core 120.

Meanwhile, a water pump 150 and a water tank 140 may be installed in the inlet pipe 121 or the outlet pipe 122 of the heater core 120. In the figure, the water tank 140 is installed on the inlet pipe 121 side of the heater core 120 and the water pump 150 is installed on the outlet pipe 122 side, but this may be changed.

In addition, although not shown in the drawings, a plate heat exchanger may be installed to heat-exchange the coolant and the refrigerant circulating in the heater core 120. In this case, since the coolant is heat-exchanged with the coolant, the coolant is rapidly accumulated and the coolant fastness is improved.

On the other hand, when the flow rate control valve 200 blocks the flow of coolant between the coolant supply means 170 and the heater core 120, the water pump 150, the water tank 140, the heater core 120 to coolant The closed circuit is formed to circulate, wherein the water pump 150 serves to circulate the coolant in the closed circuit.

The water tank 140, by storing a predetermined amount of cooling water to increase the capacity of the cooling water. If the cooling water capacity is increased due to the water tank 140, the cooling or heat storage capacity is also increased by that much, it is possible to further increase the cooling, heating duration when the engine is stopped.

The water tank 140 is installed on the bottom of the air conditioning case 110 between the evaporator 104 and the heater nose 120. Of course, it may be installed outside the air conditioning case 110.

Meanwhile, in the drawing, only the case in which the water tank 140 is connected to the inlet pipe 121 of the heater core 120 is illustrated, but when the water tank 140 is installed inside the air conditioning case 110, The heater core 120 and the water tank 140 may be manufactured integrally.

Hereinafter, the operation of the flow rate control valve and the air conditioner according to the present invention will be described.

end. In the maximum cooling mode (see Fig. 10)

In the maximum cooling mode, the first piston 221 of the directional valve 220 is operated to move toward the outlet port 213 based on the supply port 211, and the second piston 222 is the inlet port 214. ) To move toward the recovery port 212. As a result, the supply port 211 and the recovery port 212 communicate with each other, and the inlet port 214, the first cooling water passage 216, and the outlet port 213 communicate with each other.

Therefore, the coolant supplied from the coolant supply means 170 (engine side) to the heater core 120 is completely blocked by the first and second pistons 221 and 222, thereby cooling water circulating in the coolant supply means 170. And the cooling water circulating in the heater core 120 are separated.

At this time, the cooling water supplied from the cooling water supply means 170 is supplied to the second cooling water passage 217 in the valve body 210 through the supply port 211, and then recovered by making a U-turn in the second cooling water passage 217. Through the port 212 is returned to the coolant supply means 170.

In addition, the water pump 150 is operated to circulate the coolant in the heater core 120 and the water tank 140 separately.

Meanwhile, the bypass door 130 opens the bypass passage 131.

Subsequently, the air introduced into the air inlet 111 of the air conditioning case 110 by the blower is cooled in the process of passing through the evaporator 104, and some of the cold air is passed through the bypass passage 131. Bypassing the heater core 120, and after passing through the heater core 120, a part of the heater core 120 is discharged into the cabin through the air discharge port opened by the mode door 113 in accordance with the air discharge mode is cooled.

In the process described above, the cooled cold air passing through the evaporator 104 passes through the heater core 120 to cool the cooling water in the heater core 120, so that the cooling water becomes cold.

At this time, while the coolant in the heater core 120 circulates through the water tank 140 by the water pump 150 along the circulation path as shown in FIG. 10, the coolant stored in the water tank 140 also cools. It becomes cold storage.

I. When the engine is stopped during the maximum cooling mode (see Fig. 11)

The compressor 101 is also stopped and the air conditioner is turned off. At this time, since the temperature of the evaporator 104 rises, the evaporator 104 is not operated. The bypass passage 131 is closed through the bypass door 130 and the entire air that has passed through the evaporator 104 flows into the heater core 120).

At this time, the water pump 150 continues to operate to circulate the cold coolant stored in the water tank 140 to the heater core 120.

Therefore, since the temperature of the air that has risen while passing through the evaporator 104 is lowered again by the cold cooling water in the heater core 120, the cooling state can be maintained and the temperature of the air discharged into the vehicle interior can be prevented from rising sharply And it is possible to prevent the uncomfortable feeling of the occupant.

All. In the maximum heating mode (see Fig. 12)

In the maximum heating mode, the first piston 221 of the directional valve 220 is operated to move toward the recovery port 212 based on the supply port 211, and the second piston 222 is the inlet port 214. ) To move toward the first coolant passage 216. As a result, the supply port 211 and the outlet port 213 communicate with each other, and the inlet port 214 and the recovery port 212 communicate with each other.

Therefore, after the hot cooling water supplied from the cooling water supply means 170 (engine side) circulates through the heater core 120, it returns to the cooling water supply means 170 again. At this time, the water pump 150 is in a stopped state in the maximum heating mode while the engine 160 is operating. In this case, the cooling water circulates through the heater core 120 by the engine-side water pump (not shown).

Of course, the water pump 150 installed on the inlet pipe 121 side of the heater core 120 may be operated together.

In more detail, the hot coolant supplied from the coolant supply means 170 is supplied to the second coolant passage 217 in the valve body 210 through the supply port 211, and then the outlet port 213 is provided. After passing through the heater core 120 via the water tank 140 through the inlet port 214 is discharged to the second cooling water passage 217, and the cooling water supply means through the recovery port 212 ( Return to 170).

Meanwhile, the bypass door 130 closes the bypass passage 131.

Accordingly, air introduced into the air inlet 111 of the air conditioning case 110 by the blower passes through the evaporator 104, and the air passing through the evaporator 104 passes through the heater core 120. After being heated through heat exchange with the heater core 120 in the process, it is discharged into the vehicle interior through the air discharge port opened by the mode door 113 according to the air discharge mode is heated.

In the above process, since the hot coolant supplied from the coolant supply unit 170 (engine side) is circulated back to the water tank 140 as well as the heater core 120, the coolant in the water tank 140 becomes hot. Heat storage.

la. When the engine is stopped during the maximum heating mode (see Fig. 13)

When the engine of the vehicle is stopped while the signal is waiting or the vehicle is stopped while driving in the maximum heating mode, the supply of the coolant is also stopped from the coolant supply means 170 (engine side), at which time the temperature of the heater core 120 is lowered. Therefore, the temperature of the air passing through the heater core 120 can also be drastically lowered. In this case, as shown in FIG. 13, the water pump 150 is operated to maintain the engine-side coolant that remains hot even after the engine stops. The hot coolant stored in the water tank 140 is circulated to the heater core 120.

Therefore, even when the engine is stopped during the maximum heating mode, since the hot coolant stored in the engine and the water tank 140 circulates to the heater core 120, the temperature of the air passing through the heater core 120 is large for a predetermined time. Since it is discharged to the interior of the vehicle to continue heating without change, it is possible to prevent the temperature of the air discharged to the interior of the vehicle from falling sharply, thereby preventing the discomfort of the occupant.

hemp. In the temperature control mode (see Fig. 14)

In the temperature control mode, the first piston 221 of the directional valve 220 operates to move to a position overlapping with the supply port 211, and the second piston 222 is based on the inlet port 214. Operate to move toward the first coolant passage 216. As a result, a part of the supply port 211 and the recovery port 212 communicate with each other, and another part of the supply port 211 and the outlet port 213 communicate with each other, and the inlet port 214 and the recovery port 212 communicate with each other. ) Is in communication.

Therefore, the hot coolant supplied from the coolant supply unit 170 (engine side) is supplied to the second coolant passage 217 in the valve body 210 through the supply port 211.

At this time, some of the cooling water supplied to the second cooling water passage 217 through the supply port 211 passes through the heater core 120 via the water tank 140 through the outlet port 213 and then the inlet port Discharged into the second coolant passage 217 through 214, and subsequently returned to the coolant supply means 170 through the recovery port 212,

The remaining of the cooling water supplied to the second cooling water passage 217 through the supply port 211 is returned in the second cooling water passage 217 to return to the cooling water supply means 170 through the recovery port 212. .

In addition, the first piston 221 of the direction switching valve 220 is to adjust the amount of cooling water circulating the heater core 120 in accordance with the temperature control.

On the other hand, the bypass door 130 adjusts the opening degree of the bypass passage 131 according to the temperature control, the water pump 150 is operated. Of course, the water pump 150 may be stopped and only the engine-side water pump may be operated.

Therefore, the air introduced through the air inlet 111 of the air conditioning case 110 by the air blowing device is cooled in the process of passing through the evaporator 104, and a part of the cold air is passed through the bypass passage 131 The heater core 120 is bypassed and a part thereof is heated while passing through the heater core 120 to be changed into a warm air and then mixed with cool air bypassing the heater core 120. Thereafter, The air is discharged to the inside of the vehicle through the air outlet opening by the air outlet 113 to adjust the temperature of the inside of the car.

As described above, in the present invention, only the case where the flow control valve 200 is applied to the semi-center type air conditioner has been described. However, the present invention is not limited to this, and may be applied to a center mounting type air conditioner, , Right independent control air conditioner, and the like, and the same effect can be obtained.

100: air conditioner 101: compressor
102: condenser 103: expansion valve
104: evaporator 105: refrigerant pipe
110: air conditioning case 111: air inlet
112a: De-Frost vent 112b: Face vent
112c, 112d: floor vent 113: mode door
120: heater core 121: inlet pipe
122: outlet pipe 130: bypass door
131: bypass passage 140: water tank
150: water pump
170: Cooling water supply means 200: Flow control valve
210: valve body 211: supply port
212: recovery port 213: outlet port
214: entrance port 215: partition wall
216: first coolant passage 217: second coolant passage
218: support
220: direction switching valve 221: first piston
222: second piston 223: piston ring
230: operating means 231: guide shaft
232: rack gear 233: pinion gear

Claims (8)

In the flow rate control valve installed on the pipe connecting the vehicle heater core 120 and the coolant supply means 170 to switch the flow direction of the coolant,
The first cooling water passage 216 is formed at one side and the second cooling water passage 217 is formed at the other side with the partition wall 215 formed therein, and both ends of the second cooling water passage 217 are formed in the first cooling water passage. A valve body 210 formed in communication with 216,
A supply port 211 formed on an outer surface of the valve body 210 and supplying the coolant supplied from the coolant supply means 170 to the second coolant passage 217;
A recovery port 212 formed on an outer surface of the valve body 210 to recover the coolant in the second coolant passage 217 to the coolant supply means 170;
An outlet port 213 formed on an outer surface of the valve body 210 to circulate cooling water in the first cooling water passage 216 or the second cooling water passage 217 to the heater core 120 according to an air conditioning mode; ,
Inlet port 214 formed on the outer surface of the valve body 210 to discharge the coolant circulated in the heater core 120 in the air conditioning mode into the first coolant passage 216 or the second coolant passage 217. )Wow,
A flow control valve is provided to be slidably installed in the second coolant passage 217 and to include a direction change valve 220 for switching the flow direction of the coolant flowing into the second coolant passage 217. . The method of claim 1,
The direction switching valve 220 is slidably installed in the second cooling water passage 217 in which the supply port 211 is located to control the flow direction of the cooling water supplied through the supply port 211. 221 and a second piston 222 that is slidably installed in the second cooling water passage 217 in which the inlet port 214 is located to adjust a flow direction of the cooling water flowing through the inlet port 214. Flow control valve, characterized in that made. The method of claim 2,
The outer circumferential surface of the first and second pistons (221, 222) flow control valve, characterized in that the piston ring 223 is coupled to improve the sealing performance. The method of claim 3, wherein
The piston ring (223) is a flow control valve, characterized in that the incision (223a) is formed on one side so as to be able to fluidly respond to the contraction or expansion of the first, second pistons (221, 222). The method of claim 2,
The second coolant passage 217 has a passage portion in which the first piston 221 slides and a passage portion in which the second piston 222 slides in a right angle shape.
The supply port 211 is formed at right angles to the passageway in which the first piston 221 slides, and the inlet port 214 is formed at right angles to the passageway in which the second piston 222 slides. Flow control valve. The method of claim 2,
An actuating means 230 is installed in the valve body 210 to operate the first and second pistons 221 and 222, respectively.
The actuating means 230 may include a guide shaft 231 formed at end portions of the first and second pistons 221 and 222, and a rack size formed on the guide shafts 231 of the first and second pistons 221 and 222. A gear 232, a pinion gear 233 rotatably installed in the second cooling water passage 217, and engaged with the rack gear 232 of the guide shaft 231, and the valve body 210. Is installed on the outer side of the flow control valve, characterized in that it comprises an actuator (234) for rotating the pinion gear (233). The method according to claim 6,
The inner circumferential surface of the second coolant passage 217 is a flow rate control valve, characterized in that the support 218 is formed to slidably support the guide shaft 231. An air conditioning case 110 in which an air inlet 111 is formed on one side and a plurality of air discharge holes are formed on the other side,
An evaporator 104 and a heater core 120 installed in the air conditioning case 110 at regular intervals in the air flow direction,
Any one of the above 1 to 7 is installed on the pipe connecting the heater core 120 and the cooling water supply means 170 and to change the flow direction of the cooling water circulating the pipe in accordance with the air conditioning mode. Flow control valve 200 described in,
It is installed on the circulation path for circulating the flow control valve 200 and the heater core 120, respectively, comprising a water tank 140 for storing a predetermined amount of coolant and a water pump 150 for circulating the coolant Vehicle air conditioning apparatus.

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