KR19990038390A - Air conditioning system - Google Patents

Abstract

When it is determined that the air conditioner is in use according to a signal input from the door position sensor 112 and / or a signal input from the air conditioner switch, the ECU 114 opens the solenoid valve 122. When the solenoid valve 122 is opened, air in the air tank 134 is supplied to the actuator 120, and the plunger 132 of the actuator 120 is moved upwards and fixed to the upper end of the first rod 116. By pushing the ball 128 towards the coolant passage, the coolant passage is blocked.

Description

Air conditioning system

The present invention relates to a heating and cooling device, and in particular, by blocking the inflow of hot engine coolant into the heater core during the operation of the air conditioner to improve the cooling performance of the air conditioner, increase the engine output efficiency and increase the merchandise of the vehicle ( air conditioning device).

The heating and cooling device of a vehicle is used to provide a comfortable sense to the occupant by maintaining an appropriate air environment such as temperature and humidity according to the change of the ambient temperature. The air conditioning unit includes a blower, an evaporator and a heater disposed inside the air duct. The blower is disposed at the front when viewed in the direction of air flow, and serves to push the outside air or the inside air (air) toward the evaporator and the heater. An evaporator is arranged behind the blower, and the evaporator cools the air by absorbing heat contained in the air by using a refrigerant condensed in the condenser and expanded in the expansion valve. The heater is located at the rear of the evaporator, and the heater heats the air by conducting heat to the air by using hot coolant after cooling the cylinder block of the engine. The heater is provided with a blend door, and the blend door controls the flow of air through the heater.

At the rear of the evaporator / heater unit, the air duct is provided with a vent door, a defroster door and a floor door; The opening and closing of the mode doors is controlled by a control switch provided in the cabin. The control switch consists of four control levers; The vent mode, defroster mode, foot mode, bilevel mode and mixing mode are selected according to the operation of the first lever. The second lever serves to adjust the cold temperature, the third lever allows to select the internal circulation mode or the external air circulation mode, the fourth lever to adjust the air volume. For example, when the foot mode is selected by the first lever, cold air or hot air is discharged through the foot duct to the driver's seat side and the passenger seat side in the cabin. When the mixing mode is selected according to the operation of the first lever, air is supplied through the defroster door and the foot door; When the bi-level mode is selected, air is supplied through the vent door and the foot door.

However, in the air-conditioning apparatus according to the prior art structured as described above, since the heater and the evaporator are disposed together in the interior of the air duct, the engine coolant that is heated during the operation of the air conditioner flows into the heater core and is removed from the heater core. Since the heat dissipated is mixed with the cold generated by the air conditioner, the cooling performance of the air conditioner is lowered, and thus there is a problem that the engine output efficiency is lowered.

The present invention was created to solve the problems inherent in the air conditioning apparatus according to the prior art as described above, an object of the present invention is to cool the air conditioner by blocking the flow of the engine coolant to the heater core during operation of the air conditioner The present invention provides an air conditioning and heating system that improves performance, increases engine output efficiency, and increases vehicle marketability.

1 is a system diagram showing the overall structure of a heating and cooling device according to the present invention.

Figure 2 is a cross-sectional view showing the cooling water blocking structure details of the air conditioning and heating device according to the invention.

Explanation of symbols on the main parts of the drawings

100: air conditioning unit 102: air duct

104: blend door 106: heater core

108: coolant pipe 110: engine

112: door position sensor 114: ECU

116: first rod 118: turnbuckle

120: actuator 122: solenoid valve

124: air tank 126: second rod

128: ball 130: spring

132: plunger 134: case

136: protrusion 138: piston

According to an aspect of the invention, there is provided a heating and cooling device: the device, characterized in that it comprises a cooling water blocking means for preventing the engine coolant flows into the heater core when the air conditioner switch is turned on.

According to another aspect of the invention, the cooling water blocking means, the actuator; A plunger member having one end reciprocated inside the actuator while the other end is moved between an open position and a closed position of the coolant passage toward the heater core; A fluid tank connected to the actuator; A valve member disposed in the hydraulic line connecting the actuator and the fluid tank; And an ECU for opening and closing the valve member according to an operation of an air conditioner or an operation of a heater.

According to another aspect of the invention, the valve member is a solenoid valve.

According to the above characteristics of the present invention, when the air conditioner is operated, the ECU opens the solenoid valve to block the flow of cooling water toward the heater core by moving the plunger member to the open position, thereby improving the cooling performance of the air conditioner and the engine output efficiency. This increases and the merchandise of the vehicle increases.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention, the same reference numerals will be used for the same parts throughout the drawings.

1, there is shown a system diagram showing the overall structure of the heating and cooling device according to the present invention; Figure 2 shows a cross-sectional view showing the cooling water blocking structure details of the air conditioning and heating device according to the present invention.

The air conditioning and heating device 100 according to the present invention includes an air duct 102, and the inside of the air duct 102 is provided with a blend door 104 that opens and closes according to the operation of an air conditioner or a heater. When the air conditioner is operated, the blend door 104 passes the air flowing through the blower through the evaporator (not shown), and passes the air to the heater when the heater is operated. The door position sensor 112 is installed inside the air duct 102, and the door position sensor 112 detects whether the blend door 104 is in the air conditioner operation position or the heater operation position.

According to the present invention, in the path of the engine coolant pipe 108 extending from the engine 110 toward the heater core 106, a protrusion 136 is formed in communication with the outside, and the threaded portion is formed on the outer surface of the protrusion 136. Is formed. The case 134 is screwed to the protrusion 136, and an operating space communicating with the inside of the cooling water pipe 108 is provided in the case 134.

The first rod 116 is disposed in the operating space of the case 134 in a vertically reciprocating manner, and the ball 128 is fixed to the upper end of the first rod 116. The ball 128 is operable between an open position for opening the coolant passage provided in the coolant pipe 108 and a closed position for closing the coolant passage. The piston 138 is fixed to the lower end of the first rod 116, one end of the spring 130 is seated on the upper surface of the piston 138, the other end of the spring 130 is the projection of the protrusion 136 It rests against the bottom surface. The spring 130 serves to press the first rod 116 downward.

The second rod 126 is provided below the first rod 116, and the actuator 120 is disposed below the second rod 126. The second rod 126 is fixedly connected to the plunger 132 of the actuator 120 through the turnbuckle 118, the actuator 120 is connected to the air tank 124 via a hydraulic line. A solenoid valve 122 is arranged in the path of the hydraulic line connecting the actuator 120 and the air tank 124, and the solenoid valve 122 is connected to the ECU 114.

The ECU 114 opens the solenoid valve 122 when it is determined that the air conditioner is in use according to a signal input from the door position sensor 112 and / or a signal input from an air conditioner switch (not shown). . When the solenoid valve 122 is opened, the air in the air tank 134 is supplied to the actuator 120, and thus the plunger 132 of the actuator 120 is moved upwards to the upper end of the first rod 116. The fixed ball 128 is pushed toward the coolant passage to block the coolant passage. When a heater is used, the ECU 114 closes the solenoid valve 122 to open the coolant passage.

According to the above-described configuration of the present invention, the ECU opens the solenoid valve during operation of the air conditioner, thereby blocking the flow of cooling water toward the heater core by moving the plunger to the open position, thereby improving the cooling performance of the air conditioner and outputting the engine. The efficiency is increased and the merchandise of the vehicle is increased.

While the present invention has been illustrated and described with reference to certain preferred embodiments, the invention is not limited thereto but may vary without departing from the spirit or scope of the invention as set forth in the claims below. It will be readily apparent to those skilled in the art that such modifications and variations can be made in the art.

Claims (3)

In the air conditioning unit, And a cooling water blocking means for preventing the engine coolant from flowing into the heater core when the air conditioner switch is turned on. The method of claim 1, The cooling water blocking means, the actuator; A plunger member having one end reciprocated inside the actuator while the other end is moved between an open position and a closed position of the coolant passage toward the heater core; A fluid tank connected to the actuator; A valve member disposed in the hydraulic line connecting the actuator and the fluid tank; And an ECU that opens and closes the valve member in accordance with an operation of an air conditioner or an operation of a heater. The method according to claim 1 or 2, Heating and cooling device, characterized in that the valve member is a solenoid valve.