KR20010089907A - Device for eliminating latent heat of air conditioner having heater - Google Patents

Abstract

In the heater-mounted air conditioner equipped with a microcomputer and an indoor fan, first and second relays which independently perform on / off operations by a control signal output from the microcomputer according to a user's mode selection, and the heating mode selection And a fan motor that removes latent heat in the air conditioner by rotating the indoor fan by operating the power charged in the capacitor for a predetermined time when the power is turned off or during a power failure during heating operation. In case of power failure, the fan motor is driven by the charging power of the condenser for a certain time to prevent the temperature rise against latent heat, thereby preventing damage to the product.

Description

Latent Heat Removal Device of Heater Mounted Air Conditioner

The present invention relates to an air conditioner, and more particularly, to a latent heat removing device of a heater-mounted air conditioner.

In general, an air conditioner equipped with a heater inhales cold air in a room, exchanges the sucked cold air to hot air, and then discharges the warmed air back to the indoor unit to heat the room to an appropriate temperature. It is composed of a connecting pipe connecting the indoor unit and the outdoor unit so that the coolant flows from the indoor unit to the outdoor unit installed outdoors, the outdoor unit installed outdoors, and the outdoor unit or the outdoor unit to the indoor unit.

In addition, the air conditioner with the heater is used for the heater pump and the air conditioner, the heater pump for heat exchange the cold air of the room sucked into the indoor unit to hot air and then heat exchange the hot air once more After the temperature is raised, the heated air is discharged to the room. For the air conditioner, the cold air of the room sucked into the indoor unit is thermally replaced by the hot air after stopping the operation of the outdoor unit. It will be discharged by heating the room to the proper temperature.

Hereinafter, with reference to the accompanying drawings as follows.

1 is a block diagram showing a general heater-mounted air conditioner, Figure 2 is a control block diagram of a heater-mounted air conditioner according to the prior art.

As shown in FIG. 1, a general heater-mounted air conditioner is provided with a main body 1, a front panel 2 coupled to a front surface of the main body 1, and installed in the main body 1 to provide an indoor unit. A cross flow fan (3) rotated to suck cold air and to discharge the sucked air into the room, a suction port (5) installed at the lower portion of the front panel (2) to suck the cold air in the room, and A heat exchanger 6 installed in the main body 1 and in which a hot refrigerant flows so as to open and circulate air sucked through the inlet port 5 by the rotation of the cross flow fan 3, and an upper portion of the front panel 2. A discharge port 7 formed to discharge air flown by the rotational force of the cross flow fan 3 into the room, and an air having a temperature increased while passing through the heat exchanger 6 at the rear of the discharge port 7. The heater 4 to heat exchange once more and the discharge port 7 And up and down wind louvers 8 for adjusting the discharge direction up and down, and left and right wind louvers 9 installed at the rear of the up and down wind louvers 8 for adjusting the discharge direction of the discharged air to the left and right. .

In the air conditioner configured as described above, when the user selects the heating operation mode while the power is supplied to the air conditioner, the cross flow fan 3 installed in the main body 1 of the indoor unit rotates by receiving the driving force of the fan motor. In this case, indoor air is sucked into the indoor unit through the suction port 5 installed in the indoor unit front panel 2.

The air sucked into the indoor unit is heat-exchanged in the course of passing through the heat exchanger 6 in which the hot refrigerant flows inside the main body 1, and the hot air is heated as the cross flow fan 3 continues to rotate. After passing through the heater 4, the heat exchange is performed to increase the temperature, and then discharged to the outside of the indoor unit through the discharge hole 7 formed in the upper portion of the front panel 2, thereby heating the room to an appropriate temperature.

At this time, the air discharged to the outside of the indoor unit is controlled by the up and down wind direction louver 8 installed in the discharge port (7) up and down, the left and right wind direction installed in the rear of the up and down wind direction louver (8) The wind direction of the discharged air is adjusted left and right by the louver 9.

In addition, the cold air of the room sucked into the indoor unit is exchanged with the hot refrigerant flowing in the heat exchanger 6 while passing through the heat exchanger 6 to generate condensed water, which is accumulated on a drain plate installed in the indoor unit and then the drain plate. It is drained to the outside of the indoor unit through the drain hose which is connected to.

As described above, since the air conditioner is out of power during operation or the inlet port 5 is blocked and the air flow around the heater 4 is not made smoothly, overheating of the heater 4 is prevented by the safety device. Is installed on the upper side of the heater 4 to sense the temperature of the heater 4 to stop the operation of the heater 4, the first bimetal switch 10 and the heater 4 is installed on the other side of the upper heater It consists of a temperature thermistor 11 to stop the operation by sensing the temperature of (4).

The first bimetal switch 10 and the temperature thermostat 11 are connected in series, and the temperature the thermostat 11 is higher than the temperature of the heater 4 detected by the first bimetal switch 10. Senses the temperature of the heater 4.

The first bimetal switch 10 stops the operation of the heater 4 when the temperature of the heater 4 rises, and automatically returns the heater 4 to operate automatically when the temperature of the heater 4 decreases. The temperature thermistor 11 is a manual return type which manually stops and operates when the temperature of the heater 4 is increased so that the first bimetal switch 10 is not operated.

The bimetal refers to two kinds of metal plates having different thermal expansion coefficients facing each other to bend from the larger side to the smaller side in proportion to the change in temperature.

In the heater mounted air conditioner configured as described above, when power is cut off during operation of the air conditioner or foreign matter is caught in the inlet 5 of the indoor unit, and the inlet 5 is blocked, around the heater 4 installed at the upper end of the indoor unit. Since the air sucked into the indoor unit does not flow, that is, the air is stagnant, the temperature of the heater 4 is increased by the latent heat of the air.

When the temperature of the heater 4 rises above a predetermined temperature, the first bimetal switch 10 installed on one side of the upper part of the heater 4 is operated to operate the heater 4 by the first bimetal switch 10. It stops and the power of the air conditioner is cut off, so that the temperature of the heater 4 is prevented from rising.

In addition, when the temperature of the heater 4 is reduced, the first bimetal switch 10 is automatically returned to its original position and the heater 4 is operated again, so that hot air is discharged to the room to heat the room.

At this time, when the temperature of the heater 4 is increased by a predetermined temperature because the first bimetal switch 10 is not operated, by manually operating the temperature thermistor 11 installed on the other side of the heater 4 by manual operation. The operation of the heater 4 is stopped and the power of the air conditioner is cut off to prevent the temperature of the heater 4 from rising.

When the temperature of the heater 4 is reduced, since the temperature thermistor 11 is returned to its original position, the heater 4 is operated again to discharge hot air into the room to heat the room.

As described above, the first bimetal switch 10 normally cuts off the power at 60 to 70 ° C and supplies power at 45 to 50 ° C to control the temperature of the heater. In addition, when the first bimetal switch 10 is not controlled due to burnout or external influence of the bimetal, the temperature thermistor 11 usually stops the power supply at 120 ° C. to protect the heater. You can stop the rise.

The heater-mounted air conditioner according to the prior art configured as described above operates the indoor fan by the circuit configuration as shown in FIG.

Referring to FIG. 2, a microcomputer 21 for outputting a control signal, a transistor Q1 for which conduction is determined according to the control signal of the microcomputer 21, and an input power is energized when the transistor Q1 is conductive. It consists of a relay 22 and a fan motor M1 to be driven when the relay 22 is turned on.

At this time, when the driving stop signal is output from the microcomputer 21, the fan is driven by driving the fan motor M1 for a predetermined time to remove the latent heat of the heater itself.

However, since the control signal is not output from the microcomputer 21 during the momentary power failure, the transistor Q1 is turned off, the relay 22 is also turned off, and the driving of the fan motor M1 is immediately stopped.

Therefore, the heater-mounted air conditioner according to the prior art has the following problems.

First, during a momentary power failure, the indoor fan does not operate, causing a temperature increase due to latent heat.

Second, there is a concern that the temperature rise may cause fire or fatal damage to the product itself.

Third, there is a hassle to replace the fuse (fuse) at every momentary power failure by causing damage to the secondary thermostat due to the temperature rise due to latent heat.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a latent heat removal device of a heater-mounted air conditioner that can remove latent heat by operating a fan motor as in normal operation even during a momentary power failure. .

1 is a front view showing a typical heater mounted air conditioner

Figure 2 is a circuit diagram showing the indoor fan drive circuit of the heater-mounted air conditioner according to the prior art

3 is a circuit diagram showing a latent heat removing device of a heater-mounted air conditioner according to the present invention.

Explanation of symbols for main parts of the drawings

30: microcomputer 40: the first relay

50: second relay M2: fan motor

C13: condenser

The present invention provides a microcomputer and a heater-mounted air conditioner having an indoor fan, the first and second relays to independently perform an on / off operation by a control signal output from the microcomputer according to a user's mode selection, and When the heating mode is selected, when the first and second relays are turned on at the same time, the capacitor is charged with input power, and when the power is turned off or when a power failure occurs during the heating operation, the air is operated by rotating the indoor fan for a predetermined time by operating the power charged in the capacitor. It features a fan motor that removes latent heat in the cabin.

Hereinafter, a heater-mounted air conditioner according to the present invention will be described with reference to the accompanying drawings.

3 is a circuit diagram illustrating a latent heat removing apparatus of a heater-mounted air conditioner according to the present invention.

As shown in FIG. 3, the present invention provides a microcomputer 30 that outputs a control signal according to a user's mode selection, and whether the conduction is determined by receiving a control signal of the microcomputer 30 as a base. A first relay 40 for driving according to the conduction of the second transistor Q11 and Q12, the first transistor Q11, and a second relay for driving according to the conduction of the second transistor Q12 ( 41, a condenser C13 for charging input power when the first and second relays 40 and 41 are turned on, and an indoor fan (not shown) for a predetermined time by input power or charging power of the condenser C13. It consists of a fan motor (M2) for rotating).

At this time, the first and second relays 40 and 41 are connected in parallel with the condenser 13 and the fan motor M2, and the fan motor M2 is a DC motor.

The operation of the first and second relays 40 and 41 will now be described with reference to the following table.

First relay 2nd relay Condenser cooling On off Not charged heating On On charge

As shown in Table 1, when the cooling operation is selected, the first relay 40 is turned on, and the second relay 41 is turned off, so that the capacitor C13 is not charged.

In addition, when the heating operation is selected, the first relay 40 and the second relay 41 are turned on at the same time, and the capacitor C13 is charged.

Therefore, when the operation off signal is input during normal operation, the first relay 40 and the second relay 41 are turned off at the same time, and the fan motor M2 is fixed by using the power charged in the capacitor C13. Run time.

In addition, in the case of a momentary power failure, the fan motor M2 is driven for a predetermined time by using the power charged in the capacitor C13 in the same manner as described above, thereby preventing a temperature increase by the motor itself.

The latent heat removal apparatus of the heater-mounted air conditioner according to the present invention has the following effects.

First, it is possible to suppress the temperature rise with respect to latent heat by driving the fan motor for a predetermined time by the charging power of the capacitor when the momentary power failure occurs.

Second, damage to the product can be prevented by preventing the temperature rise.

Third, it is possible to minimize the trouble of having to replace the secondary fuse at every momentary power failure by protecting the secondary fuse that is damaged during the temperature rise.

Claims (5)

In microcomputer, heater mounted air conditioner with indoor fan, First and second relays that independently perform an on / off operation by a control signal output from the microcomputer according to a user's mode selection; A condenser that charges the input power when the heating mode is selected, A latent heat removing device of an air conditioner, comprising a fan motor which removes latent heat in an air conditioner by rotating the indoor fan by operating the power charged in the condenser for a predetermined time when the power is turned off or when a power failure occurs during heating operation. . The method of claim 1, The capacitor is a latent heat removal device of a heater-mounted air conditioner, characterized in that the charge is applied by applying a 440V DC power. The method of claim 1, When the cooling mode is selected, the first relay is turned on, and the second relay is turned off, the latent heat removing apparatus of the heater-mounted air conditioner. The method of claim 1, The first and second relays are turned on at the same time when the heating mode is selected, the latent heat removal device of the heater-mounted air conditioner. The method of claim 1, The fan motor is a latent heat removal device of the heater-mounted air conditioner, characterized in that the DC motor.