KR20030052302A - Evaporator heating device and it's control method of air conditioner system - Google Patents

Abstract

PURPOSE: An evaporator-heating device of an air conditioner system and the control method are provided to prevent a bad smell from coming into the room in operating an air conditioner. CONSTITUTION: An air conditioner system comprises a compressor, a condenser, an expansion valve, and an evaporator(4). An evaporator-heating device of the air conditioner system has a PTC(Positive Temperature Coefficient) element(10) installed on a side of the evaporator. The PTC element is installed to the lower side of the evaporator. An evaporator-heating control method of the air conditioner system comprises steps of deciding whether an ignition switch is on; deciding whether an air conditioner is on; deciding whether the air conditioner is on for predetermined time; deciding whether predetermined time has passed since the ignition switch is off; deciding power of a battery(23) is proper after passage of the predetermined time; and operating the PTC element. Thus, water drops on the evaporator are simply removed. Accordingly, a bad smell is prevented from coming in the room in operating the air conditioner.

Description

Evaporator heating device for air conditioning system and its control method {EVAPORATOR HEATING DEVICE AND IT'S CONTROL METHOD OF AIR CONDITIONER SYSTEM}

The present invention relates to an evaporator heating device of an air conditioning system and a control method thereof.

As is generally known, an air conditioner system of a vehicle supplies cold air to a room to maintain an indoor temperature at an appropriate level. The air conditioner system of the vehicle can exchange indoor air and outdoor air as necessary while supplying the cold air. Heat exchanged air around the cold evaporator is guided into the room through the duct by the blowing force of the blowing fan.

1 and 2, the conventional air conditioner system is composed of a compressor (1) and a condenser (2), an expansion valve (3), an evaporator (4), etc., the high temperature compressed by the compressor (1) The high pressure refrigerant is moved to the condenser 2, and the high temperature and high pressure refrigerant moved to the condenser 2 is cooled and liquefied due to heat exchange with outside air. The liquefied refrigerant is moved to the expansion valve (3) through a receiver dryer (not shown), the refrigerant moved to the expansion valve (3) is moved to the evaporator (4) under reduced pressure, the evaporator (4) The low temperature low pressure refrigerant moved to the heat exchanger is then moved to the compressor (1).

When the air conditioner system is operated as described above, the evaporator 4 loses heat while condensing heat, and the moisture (condensation) formed on the evaporator 4 is in contact with the atmosphere when the air conditioner is turned off. Due to the change in the water droplets will be present around the evaporator (4).

Reference numeral 5 denotes an upper case accommodating the evaporator 4, and 6 a lower case accommodating the evaporator 4.

However, in the above air conditioner system, since harmful bacteria such as bacteria and filamentous fungi grow and grow in water droplets around the evaporator 4 (surface) after the air conditioner is stopped, odors caused by the above mentioned harmful bacteria are brought into the room when the air conditioner is restarted. There is a problem that causes pollution to the interior as well as causing discomfort to the occupant.

SUMMARY OF THE INVENTION An object of the present invention is to provide an evaporator heating apparatus for an air conditioner system and a control method thereof in which the odor is prevented from entering the room when the air conditioner is operated by correcting the above problems.

In order to achieve the above object, the evaporator heating apparatus of the present invention is to provide a PTC element on any one side of the evaporator in an air conditioner system composed of a compressor, a condenser, an expansion valve, an evaporator, and the like.

In order to achieve the above object, the evaporator heating control method of the present invention comprises a first step of determining whether the ignition switch is on, a second step of determining whether the air conditioner is on, and the on time of the air conditioner A third step of determining whether the predetermined time has passed, a fourth step of determining whether the ignition switch is turned off after the predetermined time has elapsed, and a fifth step of determining whether the battery is proper after the predetermined time has elapsed in the fourth step. And a sixth step of operating the PTC element when the battery is appropriate in the fifth step.

1 is a schematic view showing a general air conditioner system,

2 is an exploded view showing a general evaporator unit,

3 is a front view showing the installation state of the embodiment of the present invention,

4 is a block diagram showing a control state of the embodiment of the present invention;

5 is a flowchart showing a control state of the embodiment of the present invention.

<Description of the code used in the main part of the drawing>

1: compressor 2: condenser

3: expansion valve 4: evaporator

5: upper case 6: lower case

10: PTC device 20: Microcomputer

21: ignition switch 22: air conditioner

23: battery

1 and 2 and as shown in Figs. 3 to 5, in the air conditioner system composed of a compressor 1, a condenser 2, an expansion valve 3, an evaporator 4, etc., The PTC (Positive Temperature Coefficient) element 10 for generating heat is provided on either side of the evaporator 4.

The PTC element 10 is also referred to as a static thermistor, and has a low specific resistance value at low temperature due to the constant temperature characteristic, so that the current can be energized well. It is widely used in constant temperature heaters, current limiting devices or temperature sensors because it exhibits the characteristics of the non-conductor, and the PTC element 10 generates heat by the selective supply power of the battery 23 so that the surface of the evaporator 4 can be It is to prevent harmful bacteria from growing and growing.

In particular, the PTC element 10 dissipates the presence of the condensate generated during the operation of the evaporator 4 in a short time, and the PTC element 10 is installed at the lower side of the evaporator 4 so that the remaining water droplets that are not drained It is to be evaporated rapidly, the water droplets are evaporated within a short time to block the native growth of harmful bacteria such as bacteria and filamentous fungi (fungus), the operation of the PTC device 10 is controlled by the microcomputer 20 It is done.

As described above, the present invention prevents odors from entering the room when the air conditioner is operated. The PTC element 10 for heating is installed on the side or the bottom of the evaporator 4, and the PTC element 10 is controlled. For this purpose, the program for controlling the PTC element 10 is stored in the microcomputer 20.

The program for controlling the PTC element 10 stored in the microcomputer has six steps. The first step S1 determines whether the ignition switch 21 of the vehicle is ON and the first step S1. ) After a second step (S2) of determining whether the air conditioner 22 is on, and a third step (S3) of determining whether the on time of the air conditioner 22 is a predetermined time after the second step (S2). The air conditioner 22 is normally operated in the third step S3 and the ignition switch 21 is turned off after a predetermined time has elapsed for a predetermined time. In the fourth step (S4) for determining the step, the fifth step (S5) for determining whether the power supply of the battery 23 is appropriate after a predetermined time has elapsed in the fourth step (S4), and in the fifth step (S5) When the power of the battery 23 is appropriate, the sixth step S6 of operating the PTC element 10 is performed.

The first and second steps S1 and S2 determine whether the engine and the air conditioner 22 have been operated, and the third and fourth steps S3 and S4 indicate that the engine and the air conditioner 22 are not operated. In addition to determining whether a proper time has elapsed after the engine and the air conditioner 22 are stopped, the fifth and sixth steps S5 and S6 determine whether the battery 23 is appropriate. The battery 23 is applied to the PTC device 10 for a predetermined time.

When the battery 23 power is applied to the PTC element 10 by the sixth step S6, the PTC element 10 generates heat for an extremely short time while raising the temperature of the surface of the evaporator 4. The temperature raised on the surface of the evaporator 4 is to evaporate the water droplets that are condensation on the surface of the evaporator 4. When the water droplets existing on the surface of the evaporator 4 are extinguished by the PTC element 10, the native bacteria of the harmful bacteria are essentially blocked, and as the harmful bacteria do not grow on the surface of the evaporator 4, the air conditioner 22 Odor is not introduced into the room when the operation.

As described above, the present invention is to install a PTC element on the side or the lower side of the evaporator, and by selectively applying the battery power to the PTC element in accordance with the interruption of the microcomputer to allow the PTC element to generate heat for a suitable time, the PTC element generates heat As the temperature of the evaporator surface rises, water droplets on the evaporator surface are simply removed.

After a certain period of time after the evaporator stops operating, no water droplets exist on the surface of the evaporator, thereby naturally blocking harmful bacteria, and since the harmful bacteria do not grow naturally, no odors are introduced into the room when the air conditioner is operated. will be.

Claims (3)

In an air conditioner system composed of a compressor (1), a condenser (2), an expansion valve (3), an evaporator (4), etc., an air conditioner characterized in that a PTC element (10) is provided on one side of the evaporator (4). Evaporator heater in the system. The method of claim 1, Evaporator heating device of the air conditioning system, characterized in that the PTC element (10) is installed below the evaporator (4). The first step (S1) of determining whether the ignition switch 21 is on, the second step (S2) of determining whether the air conditioner 22 is on, and the on time of the air conditioner (22) is a predetermined time. The third step (S3) of determining whether or not the predetermined time, the fourth step (S4) of determining whether the ignition switch 21 is turned off after the predetermined time has elapsed, and the predetermined time is determined in the fourth step (S4). The fifth step (S5) of determining whether the battery 23 is appropriate after the elapsed time, and the sixth step (S6) of operating the PTC element 10 when the battery 23 is appropriate in the fifth step (S5) Evaporator heating control method of the air conditioning system, characterized in that.