KR880002115B1 - Control circuit of air conditioner - Google Patents

Abstract

The air conditioner reduces the unnecessary power loss by defrosting after comparing the temp. of heat exchanger and setting temp., and provides warm air in initial driving time by switching on the fan motor (PN) after checking the temp. of the heat exchanger. It comprises a timer (10) for setting the driving time, a temp. setting and sensing circuit (20) for controlling a compressor (CM), a defrosting and valve actuating circuit (30) for controlling a valve (BV), and a fan driving circuit (40) for controlling the fan motor (PN).

Description

Control circuit of air conditioner

1 is a circuit diagram of the present invention.

2 is a driving circuit diagram of a general air conditioner.

* Explanation of symbols for main parts of the drawings

10: timer setting unit 20: temperature setting and detection unit

30 defrost and valve drive 40: indoor fan drive

SW ₁ : Continuous / Timer / Off / Selection switch SW ₂ : Timer on operation selector switch

SW ₃ : timer off operation selector switch SW ₅ : air conditioning switch

SW ₆ : Relay contact switch OP ₁ ~ OP ₆ : OP amplifier

AS ₁ , AS ₂ , AS ₃ , AS ₄ : Analog Switch PC ₁ : Photocoupler

EXOR: Exclusive, Oagate PL ₁ -PL ₄ : Photocoupler light emitting element

PT ₁ -PT ₄ : photocoupler light receiving element TD ₁ -TD ₄ : triac

TH ₁ , TH ₂ : Thermistor VR ₁ , VR ₂ : Variable resistor

PN: Fan Motor BV: Valve

CM: Compressor LD ₁ , LD ₂ : Light Emitting Diode

FF ₁ -FF ₃ : Flip-flop CT ₁ -CT ₃ : Counter

The present invention relates to a control circuit of an air conditioner.

Conventional air conditioners are driven by a mechanical program timer, and the compressor and fan motors are controlled by comparing the room temperature with the set temperature, and the defrosting is performed periodically according to time.

First: When defrosting during heating, the defrosting operation is performed considering only the time, ignoring other conditions, and there is a lot of unnecessary defrosting operations, which increases power consumption.

Second: Since the fan motor is driven in conjunction with the compressor regardless of the heat exchange temperature during heating, there is a closed end that causes cold wind to blow at the beginning of heating.

In view of the above, the present invention compares the heat exchange temperature and the set temperature and defrosts them, thereby preventing unnecessary power loss and allowing the fan motor to be driven according to the heat exchange temperature during heating, thereby turning off the fan motor during initial heating. "To prevent cold wind by configuring the temperature setting unit and the sensing unit and the defrosting and valve bent portion in the timer setting unit is configured to control the indoor fan drive unit according to the output of the sensing unit and the drive unit.

When described in detail by the accompanying drawings as follows.

2 is a driving circuit diagram of a general air conditioner. The AC power supply AC drives the 4-way valve BV, the compressor CM, and the indoor fan driving motor PN to supply cooling and heating airflow to the room. It is configured.

1 is a circuit diagram of the present invention for controlling a general air conditioner as shown in FIG. 2, wherein the timer setting unit 10 is configured to set a driving time of a general air conditioner as shown in FIG. 2. , B is continuous, c is off) The power supply Vcc applied according to the selection of the timer on operation selection switch SW ₂ and the timer off operation selection switch SW ₃ is the flip-flop FF ₁ and the respective AND gates. By driving the transistors Q ₁ and Q ₂ connected to the light emitting diodes LD ₁ and LD ₂ through (A ₁ ) and (A ₂ ), the on / off operation of the timer is sensed and the oragate (OR a ₁₎ a variable resistor (VR ₁₎ the by clearing the time counter (CT ₁₎ for setting the flip-flop (the output (Q) of the flip-flop (FF ₂₎ after configuring to apply a clock signal to the FF ₂₎ connected via a aND gate (a ₃₎ and Iowa gate to control the transistor (Q ₃₎ via a (OR ₂₎ A timer setting unit 10.

Here, the timer on / off selection switch SW ₂ (SW ₃ ) is a push button switch. In addition, the temperature setting and sensing unit 20 is configured to control the compressor CM of FIG. 2 by comparing the room temperature with the set temperature when the timer setting unit 10 is driven, and the non-inverting of the OP amplifier OP ₁ . Set the reference temperature connected to the non-inverting (+) side of the OP amplifier (OP ₂ ) by which the comparative power supply (V ₁ ) detected and drawn out through the room temperature sensing thermistor (TH ₁ ) connected to the (+) side is connected. criteria for the presented set through the variable resistor (VR ₂₎ power supply (V ₃₎ the OP amplifier (OP ₃₎ exclude transceiver Iowa gate (EXOR) is configured to be applied to one side and the air change-over switch is compared via the (SW ₅ (A is heating, b is cooling), and controls the transistor Q ₅ through the EXCLUSIVE ORAGATE (EXOR) and the ORA (OR ₄ ) and then the photocoupler light emitting device and the light receiving device (PL). ₁ ) The driving of the compressor CM is controlled by controlling the triac TD _{4 of} FIG. 2 through PT ₁ . It is.

In addition, the defrosting and valve driving unit 30 is configured to drive the valve (BV) of FIG. 2 when the timer setting unit 10 and the temperature setting and sensing unit 20 are driven and to perform the defrosting operation according to the heat exchange temperature. The output of the OP amplifier OP ₅ OP ₆ , which is connected to the thermistor TH ₂ and detects the heat exchange state, is connected to each end gate A ₅ together with the power supply Vcc of the air-conditioning switching switch SW ₅ . (A ₇ ) is applied to one side of the terminal J of the flip-flop FF ₃ and the noah gate N ₁ , and the output of the start setting counter CT _{2 at} the time of defrost is the AND gate A ₅ ) Through the control of the flip-flop (FF ₃ ) through and the completion time setting counter (CT ₃ ) controls the K terminal of the flip-flop (FF ₃ ), each end gate (A ₄ ) and noa gate (N ₁₎ through the transistor (Q ₆₎ and a photo coupler (after the control of the PC ₁₎ connected with the relay contact switch (SW ₆₎ second-degree Rove is configured to control the operation of the (BV) and Fan Motor (PN).

T<

T₁,

T₁<

T<

T₂,

T₂<

T)에 따라 A/D 콘버어터(AD₁)를 통하여 디지탈신호 처리되게 구성하고 데코더(DT₁)를 통하여 디코우딩 처리시켜 약,중,강 제어신호가 출력되게 구성된다.Here, the counter CT ₂ is driven by the clock signal CP applied through the AND gate A ₆ , and the counter CT ₃ is a clock signal CP connected to one of the inputs of the AND gate A ₂ . It is configured to drive by to set the start and completion time of the defrost. In addition, the indoor fan driving unit 40 automatically selects the driving speed of the fan motor PN of FIG. 2 during heating and cooling to strong, medium, or weak. The selection function of the air-conditioning switching switch SW ₅ is used to select the inverter I. As the analog switches AS ₁ to AS ₄ are selected through, the comparison power supply V ₁ and the reference power supply V _{3 of} the temperature setting and sensing unit 20 alternately input the power supply of the OP amplifier OP ₄ . After setting and comparing with (V ₈ ) (V ₉ ),

T <

T ₁ ,

T ₁ <

T <

T ₂ ,

T ₂ <

According to T), the digital signal is processed through the A / D converter AD _{1 and} decoded through the decoder DT ₁ to output the weak, medium, and strong control signals.

T<

T₁)(

T₁<

T<T₂)(

T>

T₂)이 각각의 PNP형 트랜지스터(Q₁₀~Q₁₂)를 통하여 포토카플러 발광소자(PL₂~PL₄)를 구동하게 구성한 후 제2도의 포토카플러 수광소자(PL₂~PL₄)를 통하여 트라이악(TD₁~TD₃)을 구동시켜 실내 팬(PN)이 약,중,강으로 구동되게 구성된 것이다.At the same time, the weak, medium and strong control outputs of the decoder DT ₁

T <

T ₁ ) (

T ₁ <

T <T ₂ ) (

T>

T ₂ ) is configured to drive the photocoupler light emitting devices PL ₂ to PL ₄ through the respective PNP type transistors Q ₁₀ to Q ₁₂ and then through the photocoupler light receiving devices PL ₂ to PL _{4 of} FIG. By driving the triac (TD ₁ ~ TD ₃ ), the indoor fan (PN) is configured to be driven by weak, medium, steel.

The flip-flops FF ₁ to FF ₃ are JK flip-flops that act as latches.

Referring to the effects of the present invention configured as described above are as follows.

In the circuit diagrams of FIGS. 1 and 2, the timer setting unit 10 sets cooling and heating times. First, the continuous / timer / off selection switch SW _{1 is} connected to the timer terminal a and the counter CT ₁ ) Set the cooling and heating time with the variable resistor (VR ₁ ) connected with the timer, and then turn on the timer ON operation selector switch (SW ₂ ) .The timer terminal of the continuous / timer / off selection switch (SW ₁ ) ( The power supply Vcc passing through a applies the "H level" to the input side of the AND gates A ₁ -A ₃ , and the "H level" generated from the output Q side of the flip-flop FF ₁ is AND. The driving state of the counter CT ₁ can be checked by "turning on" the transistor Q ₁ through the gate A ₁ to turn on the light emitting diode LD ₁ , and at the same time, the timer ON operation selector switch SW _2. ) a power source (Vcc), a gate Iowa (set to clear the counter (CT ₁₎ through the OR ₁₎ through the Keane after the flip-flop (FF ₂₎ the "H level" generated from the output side of the AND gates (A ₁₎ as applied to a clock pulse the flip-flop (FF ₂₎ and the AND gate (A ₃₎ to and Iowa gate (OR ₂ By turning on transistor Q ₃ through &lt; RTI ID = 0.0 &gt;),&lt; / RTI &gt; the compressor driving transistor Q ₅ , the valve driving transistor Q ₆ , and other elements for driving fan motor PN can be operated. It can be prepared.

)측과 앤드게이트(A₂)를 통하여 트랜지스터(Q₂)를 "턴온"시켜 발광다이오드(LD₂)를 점등시킴으로서 설정된 타이머 오프동작이 선택됨이 확인될 수 있는 것이며 이와 동시에 타임 오프동작 선택스위치(SW₃)를 통과한 전원(Vcc)이 오아게이트(OR₁)를 통하여 카운터(CT₁)를 구동시켜 일정시간후 플립플롭(FF₂)에 클럭펄스를 인가하여 플립플롭(FF₂)을 세팅시킴에 따라 플립플롭(FF₂)의 출력(Q)측으로부터 발생한 「L 레벨」이 앤드게이트(A₃)와 오아게이트(OR₂)를 통하여 트랜지스터(Q₃)를 "턴오프"시킴으로서 타이머 오프동작이 완료되고 냉난방 제어동작이 종료되는 것이다. 그리고 연속/타이머/오프 선택스위치(SW₁)가 연속단자(ㄴ)로 접속되면 연속/타이머/오프 선택스위치(SW₁)를 통과한 전원(Vcc)이 오아게이트(OR₂)를 통하여 트랜지스터(Q₃)를 계속 "턴온"시킴으로서 타이머의 설정시간과 관계없이 콤프레샤(CM) 구동용 트랜지스터(Q₅)와 밸브 구동용 트랜지스터(Q₆) 및 그밖에 팬 모우터(PN) 구동용 소자들이 동작될 수 있는 상태가 마련될 수 있는 것이다.Here, the timer off operation selection switch SW ₃ performs the cooling and heating control operation at the same time as pressing the switch SW ₃ and terminates when the set time elapses. When the timer off operation selection switch SW ₃ is “on”, the timer The power supply (Vcc) passing through the disconnect switch (SW ₃ ) is the output of the flip-flop (FF ₁ )

By turning on the light emitting diode LD ₂ by "turning on" the transistor Q ₂ through the side and the AND gate A ₂ , it is possible to confirm that the set timer off operation is selected. SW ₃₎ a power source (Vcc) is Iowa gate (OR ₁₎ a through counter (CT ₁₎ a by a predetermined time after the flip-flop (flip-flop (FF ₂₎ by applying a clock pulse to the FF ₂₎ setting the drive through the In response, the " L level " generated from the output Q side of the flip-flop FF ₂ "turns off" the transistor Q ₃ through the AND gate A ₃ and the OR gate OR ₂ to turn off the timer. The operation is completed and the heating and cooling control operation ends. When the continuous / timer / off selection switch SW _{1 is} connected to the continuous terminal b, the power supply Vcc passing through the continuous / timer / off selection switch SW ₁ passes through the oragate OR ₂ . Q ₃ ) is continuously turned on to operate the compressor (CM) driving transistor (Q ₅ ), the valve driving transistor (Q ₆ ), and other fan motor (PN) driving elements regardless of the timer setting time. The state can be prepared.

In addition, the temperature setting and detecting unit 20 sets the reference temperature of the room during cooling and heating, and then detects the room temperature so that the temperature can be compared to the non-inverting (+) side of the OP amplifier OP ₁ . The comparison power (V ₁ ) applied to the inverting (-) side of the OP amplifier OP ₃ by sensing the room temperature through the MR (TH ₁ ) is connected to the non-inverting (+) side of the OP amplifier (OP ₂ ). Compared with the reference power supply V ₃ applied to the non-inverting (+) side of the OP amplifier OP ₃ through the variable resistor VR ₂ with hysteresis characteristics, the cooling / heating switching switch SW ₅ (a is heating, B is a photocoupler light emitting device connected to the transistor Q ₅ as the " turns on " of the transistor Q ₅ through the exclusive oragate EXOR and OR ₄ . The compressor CM can be driven by PL ₁ ) turning on the triac TD ₄ of FIG. 2 through the photocoupler light receiving device PT ₁ .

)이 앤드게이트(A₄)를 통하여 트랜지스터(Q₆)를 "턴온"시킨 후 트랜지스터(Q₆)와 접속된 릴레이 코일(L₅)이 여자되어 릴레이 절환스위치(SW₆)가 "온"됨으로써 제2도의 밸브(BV)가 구동될 수 있는 것이고 써어미스터(TH₂)를 통하여 실외에 장설된 열교환기의 열교환 온도를 감지시켜 각 OP앰프(OP₅)(OP₆)의 비반전(+)측에 인가되는 비교전원(V₆)이 각 OP앰프(OP₅)(OP₆)의 반전(-)측에 인가된 기준전원(V₅)(V₇)과 비교시킨 후 OP앰프(OP₅)의 출력이 앤드게이트(A₅)와 플립플롭(FF₃) 앤드게이트(A₄)를 통하여 트랜지스터(Q₆)를 "턴오프"시켜 제2도의 밸브(BV)를 절환시키며 OP앰프(OP₆)의 출력이 앤드게이트(A₇)와 노아게이트(N₁)를 통하여 포토카플러(PC₁)를 "턴오프"시켜 제2도의 실내 팬모우터(PN)를 차단시킴으로서 제상동작이 수행될 수 있는 것이다.In addition, the defrost and valve driving unit 30 drives a refrigerant gas induction valve (BV) during cooling and heating, and performs a defrost operation to remove frost formed around a heat exchanger installed outdoors when heating (SW). ₅ ) and the outputs of the EXCLUSIVE OORGATE (EXOR) and the flip-flop (FF ₃ )

) Turns on transistor Q ₆ through end gate A ₄ , and then relay coil L ₅ connected to transistor Q ₆ is excited to relay ON switch SW ₆ turned on. The valve BV of FIG. 2 can be driven and senses the heat exchange temperature of the heat exchanger installed outdoors through the thermistor TH ₂ , thereby non-inverting (+) the respective OP amplifiers OP ₅ and OP ₆ . comparison is applied to the side power supply (V ₆₎ each OP amplifier (OP ₅₎ inversion of the (OP ₆₎ (-) was compared to the reference voltage applied to the side _{(V 5) (V 7)} OP amplifier (OP ₅ ) Outputs "turn off" transistor Q ₆ through AND gate A ₅ and flip-flop FF ₃ AND gate A ₄ to switch valve BV of FIG. ₆ ) the defrosting operation is performed by blocking the indoor fan motor PN of FIG. 2 by "turning off" the photocoupler PC ₁ through the AND gate A ₇ and the NOA gate N ₁ . It can be.

T)보다 크게 되거나 난방시 실내온도가 설정온도(

T)보다 적게 된 상태에서 열교환 온도가 높은 상태로 될때에 구동되는 것으로 냉방시 실내온도가 설정온도(

T)보다 크게되면 냉방(ㄴ)으로 선택된 냉난방 절환스위치(SW₅)에 의항 발생된 「L 레벨」이 인버터(I)를 통하여 「H 레벨」로 반전된 후 아날로그 스위치(AS₂)(AS₃)를 구동시키며 이때 실내온도 설정용 전원(V₃)이 아날로그 스위치(AS₂)를 통하여 OP앰프(OP₄)의 비반전(+)측에 기준전원(V₉)으로 인가되고 실내온도 감지용 전원(V₁)이 아날로그 스위치(AS₃)를 통하여 OP앰프(OP₄)의 반전(-)측에 비교전원(V₈)으로 인가된다.At this time, the output Q of the counter CT ₂ (CT ₃ ) controls the flip-flop FF ₃ so that the defrosting operation can be completed after a certain time. The indoor fan drive unit 40 has a room temperature at a predetermined temperature when cooling

Greater than T) or the room temperature is

It is operated when the heat exchange temperature becomes high in the state that it is less than T).

If it is larger than T), the "L level" generated by the cooling / heating switching switch SW ₅ selected as the cooling (b) is inverted to the "H level" through the inverter I, and then the analog switch AS ₂ (AS ₃ ). ) At this time, the power for setting the room temperature (V ₃ ) is applied as the reference power (V ₉ ) to the non-inverting (+) side of the OP amplifier (OP ₄ ) through the analog switch (AS ₂ ), and for detecting the room temperature. The power supply V ₁ is applied to the inverting (-) side of the OP amplifier OP ₄ through the analog switch AS ₃ as the comparison power supply V ₈ .

T)가 실내 감지온도보다 커지게 됨에 따라 기준전원(V₉)이 비교전원(V₈)보다 커지게 되므로 OP앰프(OP₄)의 출력측으로부터 「H 레벨」이 출력된 후 A/D콘버어터(A/D)를 통하여 디지탈 신호 처리되어 데코더(DT₁)에 인가되며 이때 데코더(DT₁)는 실내의 설정온도(

T)와 비교온도(

T₁)(

T₂)를 비교하여 각각의 경우(

T<

T₁)(

T<

T<

T₂)(

T>

T₂)에 따라 「L 레벨」출력을 출력하는 것이다.Where the set temperature of the room (

As the T) becomes larger than the room sensing temperature, the reference power supply V ₉ becomes larger than the comparison power supply V ₈ , so the A / D converter is output after “H level” is output from the output side of the OP amplifier OP ₄ . the digital signal is processed through the (a / D) is applied to the decoder (DT ₁₎ the decoder (DT ₁₎ is set in the room temperature (

T) and comparative temperature (

T ₁ ) (

Compare T ₂ ) in each case (

T <

T ₁ ) (

T <

T <

T ₂ ) (

T>

T ₂ ) outputs an "L level" output.

T)보다 작게 된 상태에서 열교환 온도가 높은 상태로 되면 난방(ㄱ)으로 선택된 냉난방 절환스위치(SW₅)에 의하여 발생된 「H 레벨」이 아날로그 스위치(AS₁)(AS₄)를 구동시키며 이때 실내온도 설정용 전원(V₃)이 아날로그 스위치(AS₁)를 통하여 OP앰프(OP₄)의 반전(-)측에 기준전원(V₈)으로 인가되고 실내온도 감지용 전원(V₁)이 아날로그 스위치(AS₄)를 통하여 OP앰프(OP₄)의 비반전(+)측에 비교전원(V₈)으로 인가된다.Room temperature at heating

When the heat exchange temperature becomes high in a state smaller than T), the "H level" generated by the heating / cooling switching switch SW ₅ selected as the heating (a) drives the analog switch AS ₁ (AS ₄ ). The power supply for setting the room temperature (V ₃ ) is applied to the inverting (-) side of the OP amplifier (OP ₄ ) through the analog switch (AS ₁ ) as the reference power supply (V ₈ ), and the power supply for detecting the room temperature (V ₁ ) is applied. The comparison power supply V ₈ is applied to the non-inverting (+) side of the OP amplifier OP ₄ through the analog switch AS ₄ .

T)가 실내 감지 온도보다 작아지게 됨에 따라 기준전원(V₈)이 비교전원(V₉)보다 커지게 되므로 OP앰프(OP₄)의 출력측으로부터 「L 레벨」이 출력된 후 A/D 콘버어터(A/D)를 통하여 디지탈 신호 처리되어 데코더(DT₁)에 인가되며 이때 데코더(DT₁)는 실내의 설정온도(

T)와 비교온도(

T₁)(

T₂)를 비교하여 각각의 경우 (

T<

T₁)(

T₁<

T<

T₂)(

T>

T₂)에 따라 「L 레벨」을 출력하는 것이다.Where the set temperature of the room (

As the T) becomes smaller than the room sensing temperature, the reference power supply V ₈ becomes larger than the comparative power supply V ₉ , so that the A / D converter is output after “L level” is output from the output side of the OP amplifier OP ₄ . the digital signal is processed through the (a / D) is applied to the decoder (DT ₁₎ the decoder (DT ₁₎ is set in the room temperature (

T) and comparative temperature (

T ₁ ) (

T ₂ ) in each case (

T <

T ₁ ) (

T ₁ <

T <

T ₂ ) (

T>

T and outputs the "L level", according to _2).

T<

T₁)이 「L 레벨」로 되면 PNP형 트랜지스터(Q₁₀)이 베이스측에 저전위가 인가되어 트랜지스터(Q₁₀)를 "턴온"시킨 후 전원(Vcc)이 트랜지스터(Q₁₀)와 포토카플러 발광 및 수광소자(PL₂)(PT₂)를 통하여 트라이악(TD₁)를 구동시킴에 따라 팬모우터(PN)의 보조권선이 트라이악(TD₁)을 통하여 구동됨으로서 실내팬(PN)이 약하게 구동되어 실내의 공기가 쾌적한 상태로 되는 것이다.Therefore, the output of decoder (DT ₁ )

T <

T ₁₎ is when a "L level" PNP-type transistor (Q ₁₀₎ is then applied a low potential on the base side, "turn-on" the transistor (Q ₁₀₎ power supply (Vcc) and the transistor (Q ₁₀₎ and the photo coupler As the triac TD ₁ is driven through the light-emitting and light-receiving elements PL ₂ (PT ₂ ), the auxiliary winding of the fan motor PN is driven through the triac TD ₁ so that the indoor fan PN This weak drive causes indoor air to be in a pleasant state.

T₁<

T<

T₂)이 「L 레벨」로 되면 PNP형 트랜지스터(Q₁₁)의 베이스측에 저전위가 인가되어 트랜지스터(Q₁₁)를 "턴온"시킨 후 전원(Vcc)이 트랜지스터(Q₁₁)와 포토카플러 발광 및 수광소자(PL₃)(PT₃)를 통하여 트라이악(TD₂)을 구동시킴에 따라 팬모우터(PN)의 보조권선이 트라이악(TD₂)을 통하여 구동됨으로서 실내팬(PN)이 중간으로 구동되어 실내의 공기가 쾌적한 상태로 되는 것이다.That is, when the difference between the indoor set temperature is weakened, the auxiliary winding of the fan motor PN is weakly driven through the triac TD ₁ , so that the indoor comfort can be achieved. And the output of the core (DT ₁ )

T ₁ <

T <

T ₂₎ is "L level" when the PNP-type transistor (after the transistor (Q ₁₁₎ is applied with the low potential on the base side of Q ₁₁₎ "turn-on" the power (Vcc) and the transistor (Q ₁₁₎ and the photo coupler in As the triac TD ₂ is driven through the light emitting and receiving element PL ₃ (PT ₃ ), the auxiliary winding of the fan motor PN is driven through the triac TD ₂ , thereby allowing the indoor fan PN. It is driven in the middle, and the air in the room is in a comfortable state.

In other words, when the difference between the indoor temperature and the set temperature is in the middle, the auxiliary winding of the fan motor PN is driven to the middle through the triac TD ₂ so that the room can be in a comfortable state.

T>

T₂)이 「L 레벨」로 되면 PNP형 트랜지스터(Q₁₂)의 베이스측에 저전위가 인가되어 트랜지스터(Q₁₂)를 "턴온"시킨 후 전원(Vcc)이 트랜지스터(Q₁₂)와 포토카플러 발광 및 수광소자(PL₄)(PT₄)를 통하여 트라이악(TD₃)을 구동시킴에 따라 팬 모우터(PN)의 보조권선이 트라이악(TD₃)을 통하여 구동됨으로서 실내팬(PN)이 강하게 구동되어 실내의 공기가 쾌적한 상태로 되는 것이다.Also, the output of the decorator DT ₁

T>

T ₂₎ is "L level" when the PNP-type transistor (which is applied with the low potential on the base side of Q ₁₂₎ transistor (Q ₁₂₎ a "turn-on" in which after the power (Vcc) and the transistor (Q ₁₂₎ and the photo coupler in As the triac TD ₃ is driven through the light emitting and receiving elements PL ₄ and PT ₄ , the auxiliary winding of the fan motor PN is driven through the triac TD ₃ so that the indoor fan PN This is driven strongly and the air in the room is in a comfortable state.

In other words, if the difference between the indoor set temperature is large, the auxiliary winding drive of the fan motor (PN) is driven strongly through the triac (TD ₃ ) can be a comfortable room.

In other words, according to the cooling and heating conditions, the respective parts driven as described above are as follows.

First, because of heating and cooling change-over switch (SW ₅₎ to do when the room temperature is higher than the set temperature in the switching to the cooling port (b) conditions are applied to the power supply (Vcc) of the air change-over switch (SW ₅₎ exclude transceiver Iowa gate ( The "L level" is applied to one input side of the EXOR, and the "L level" is also applied to the one input side of the AND gate A ₇ , and the "L level" is applied to the one input side of the NOA gate N ₁ . As the "L level" is applied to the input side of (A ₄ ) and the transistor Q ₆ is "turned off", the relay coil L ₅ is not excited and the relay changeover switch SW ₆ is "off", thereby providing a valve. (BV) is switched.

Here, the comparison power (V ₁ ) applied to the inverting (-) side of the OP amplifier (OP ₃ ) through the OP amplifier (OP ₁ ) connected to the thermistor (TH ₁ ) for detecting the indoor temperature is the variable resistor (VR ₂ ). H generated from the output side of the OP amplifier OP ₃ by being smaller than the reference power supply V ₃ applied to the non-inverting (+) side of the OP amplifier OP ₃ through the OP amplifier OP ₂ connected to the OP amplifier OP ₃ . level "is through exclude transceiver Iowa gate (EXOR) and Iowa gate (OR ₄₎ after the" turn on "the transistor (Q ₅₎ through photo coupler light-emitting device (PL ₁₎ and the photo coupler light-receiving element (PT ₁₎ By turning on the triac TD _{4 of} FIG. 2, the counter and output Q which "compresses" the compressor (CM) and "L level" and "H level" initially turns the flip-flop (FF ₃ ). Upon resetting, the "H level" generated from the output Q side of the flip-flop FF ₃ is inverted to the "H level" through the noah gate N ₁ , and then the photocoupler PC ₁ is turned on. " On the degree of the final second fan Motor (PN) cooling action sikimeuroseo "On", this by comparing the voltage of the OP amplifier (OP _4),, to which drives the indoor fan to be approximately normally performed.

In this case, when the cooling operation is completed and the room temperature is lower than the set temperature, the comparison power (V ₁ ) applied to the inverting (-) side of the OP amplifier OP ₃ is detected through the thermistor TH ₁ for detecting the room temperature. OP amplifier (OP ₃₎ the non-inverting (+) the reference voltage applied to the side (V ₃₎ than the larger the "L level" is exclude transceiver Iowa gate (EXOR) generated from the output of the OP amplifier (OP ₃₎ as the After passing through, the transistor Q ₆ is "turned off" through the AND gate A ₄ to switch the valve BV, and at the same time, the transistor Q ₅ is "turned off" through the oragate OR ₄ . In accordance with the fan drive photocoupler (PC ₁ ) is "turned off", the compressor (CM) and fan motor (PN) drive is "off", the room temperature can be a comfortable state.

In addition, if the frost is caught around the heat exchanger of the air conditioner installed outdoors while the air conditioner switch SW ₅ is switched to the heating terminal (a), the temperature of the heat exchange is changed below a certain level so that the OP amplifier (OP ₅ ) When the defrosting operation is performed as the heat exchange temperature detected through the thermistor (TH ₂ ) connected to (OP ₆ ) is below a certain temperature, each OP amplifier (OP ₅ ) (OP ₆ ) is connected to the thermistor (TH ₂ ). The comparison power supply V ₆ applied to the non-inverting (+) side of the power amplifier is larger than the respective OP amplifiers OP ₅ (OP ₆ ) and the reference power supply V ₅ (V ₇ ) applied to the inverting (-) side. The "H level" applied to the output side of the OP amplifier OP ₆ is applied to one side of the AND gate A ₇ , and the "H level" generated at the output side of the OP amplifier OP ₅ is the AND gate A ₅ ( a ₇₎ and then applied to the input-side power source (Vcc) is "H level to the input side of the air-conditioning switch (AND gate via the SW ₅₎ (a ₅₎ switching the heating (a) of Is applied to the "H level" to the input side of the NOR gate (N _1), the fan is turned off as is the Motor.

)측으로부터 발생되는 「L 레벨」이 앤드게이트(A₄)를 통하여 트랜지스터(Q₆)를 "턴오프"시켜 밸브(BV) 구동을 절환시킴으로서 제상 동작이 수행될 수 있는 것이다.Here, the counter CT ₂ indicating the start of defrosting is changed from the initial "L level" to "H level" and "L level" by the clock pulse OP passing through the AND gate A ₆ , indicating the completion of defrosting. Since the counter CT ₃ is converted from the initial "H level" to "L level" and "H level" by the clock pulse CP, it is generated for a predetermined time from the output Q side of the counter CT ₂ . The "H level" is applied to the input terminal J of the flip-flop FF ₃ through the AND gate A ₅ , and the "L level" generated for a predetermined time from the output side of the counter CT ₃ is the flip-flop FF. ₃ ) As applied to the input terminal K of FIG. ₃ , the "H level" generated from the output Q side of the flip-flop FF ₃ is inverted to "L level" through the noar gate N ₁ , thereby causing the photocoupler ( PC ₁₎ a "turn-off" by fan Motor (PN) drives the "oFF" and at the same time Sikkim transistor through the gate Iowa (OR ₄₎ of (Q ₅₎ a "turn-on" and to "On", the compressor (CM) output of the flip-flop (FF ₃₎ (

), The transistor (Q ₆₎ "L level" is through the AND gate (A ₄₎ are generated from the side sikimeuroseo "turned off" by the switching valve (BV) is driven in the defrosting operation can be performed.

)이 「L 레벨」과 「H 레벨」로 반전된 후 플립플롭(FF₃)의 「H 레벨」출력(

)이 앤드게이트(A₄)를 통하여 트랜지스터(Q₆)를 "턴온"시켜 밸브(BV)를 정상적으로 구동시키고 플립플롭(FF₃)의 「L 레벨」출력(Q)이 노아게이트(N₁)이 일측에 인가되며 이때 써어미스터(TH₂)의 정상적인 열교환 작용에 의하여 OP 앰프(OP₆)의 비교전원(V₆)이 기준전원(V₇)보다 작게되어 발생된 OP 앰프(OP₆)의 출력측「L 레벨」이 앤드게이트(A₇)를 통하여 노아게이트(N₁)의 입력측에 인가된 후 「H 레벨」로 반전되어 포토카플러(PC₁)를 "턴온"시킴에 따라 팬모우터(PN)가 정상적으로 구동된다.At this time, when the defrosting operation is set, the counter (CT ₂₎ completed by the time (CT ₃₎ As a counter (CT ₂₎ (CT ₃₎ "L level," the output (Q), the initial state of the "H level" Output (Q) of generated flip-flop (FF ₃ ) (

) Is inverted to "L level" and "H level", and then the "H level" output of the flip-flop (FF ₃ ) (

) "Turns on" transistor Q ₆ through AND gate A ₄ to normally drive valve BV and the "L level" output Q of flip-flop FF ₃ is noar gate N ₁ . This is applied to one side of the OP amplifier (OP ₆ ) generated by the comparative power supply (V ₆ ) of the OP amplifier (OP ₆ ) is smaller than the reference power supply (V ₇ ) due to the normal heat exchange action of the thermistor (TH ₂ ) The output side "L level" is applied to the input side of the noah gate (N ₁ ) through the AND gate (A ₇ ) and then inverted to the "H level" to turn the photocoupler PC ₁ "turn on". PN) is normally driven.

At this time, the room temperature detected by being connected to the non-inverting (+) side of the OP amplifier OP ₁ is lower than the set temperature, so that the comparative power supply V ₁ applied to the inverting (-) side of the OP amplifier OP ₃ is OP. amplifier (OP ₃₎ the non-inverting (+) reference voltage is applied to the side (V ₃₎ than the larger the "L level" to be generated from the output of the OP amplifier (OP ₃₎ a exclude transceiver Iowa gate (EXOR) as the After inverting to "H level" through the OR gate (OR ₄ ) by turning on the transistor (Q ₅ ) by turning on the compressor (CM) can be a normal heating operation can be performed.

Therefore, the compressor CM, the valve BV and the fan PN "on""switch""off" during the set time of the counter CT ₂ (CT ₃ ) by the thermistor TH ₂ for heat exchange temperature sensing. When the defrosting operation is performed during heating and the defrosting operation is completed, the compressor is completed by the completion of the set time of the counter CT ₂ (CT ₃ ) of the thermistor (TH ₁ ) (TH ₂ ) for detecting the indoor temperature and the heat exchange temperature. Normal heating operation can be performed by turning on the CM, the valve BV and the fan PN.

)측으로부터 발생된 「H 레벨」이 앤드게이트(A₄)를 통과한 후 앤드게이트(A₆)에 인가됨과 동시에 트랜지스터(Q₆)를 "턴온"시킴으로서 밸브(BV)가 "온"되는 것이다.In addition, as larger than the output power supply (V ₃₎ of the OP amplifier for the heat-output power supply (V ₁₎ of the room temperature setting of the room temperature OP amp for sensing (OP ₁₎ When the room temperature is lower than the set temperature (OP ₃₎ From the output side of the generated OP amplifier OP ₃ , the "L level" is inverted to "H level" through the exclusive oragate EXOR, and is then applied to the AND gate A ₄ and at the same time, the OR gate OR ₄ . to "turn on" the transistor (Q ₅₎ via a compressor (CM) "on" and the flip-flop output (Q) of the counter (CT2) in the initial "H level" state of the via aND gate (a ₅₎ The output Q of the counter CT ₃ , which is applied to the input terminal J of (FF ₃ ) and is in the initial "H level" state, is applied to the input terminal K of the flip-flop FF ₃ . Output of flop (FF ₃ )

The "H level" generated from the &quot;) side is applied to the AND gate A ₆ after passing through the AND gate A ₄ and at the same time turning on the transistor Q ₆ to turn on the valve BV. .

Here, since the heat exchange temperature is lowered at the time of initial heating, the comparative power supply V ₆ applied to the non-inverting (+) side of each of the OP amplifiers OP ₅ and OP ₆ through thermistor TH ₂ in the initial state of heating. The "H level" generated from the output side of the OP amplifier OP ₆ as it becomes larger than the reference power supply V ₅ (V ₇ ) applied to the inverting (-) side of each of the OP amplifiers OP ₅ and OP ₆ . this end is applied to one side of the gate (a _7), and wherein the aND gate (a ₇₎ the other side as well, so the "H level" by a power supply (Vcc) passing the air change-over switch (SW ₅₎ switching the heater is of the end After the "H level" is applied from the output side of the gate A ₇ and inverted to the "L level" through the noah gate N ₁ , the photocoupler PC ₁ is "turned off" to drive the fan motor PN. By turning off, the cold wind blowing early in the heating can be prevented.

In addition, when the heat exchange temperature detected through the thermistor TH ₂ becomes high, the comparative power source V ₆ applied to the non-inverting (+) side of each of the OP amplifiers OP ₅ and OP ₆ through the thermistor TH ₂ . L level is generated from the output side of the OP amplifier OP _{6 as} )) becomes smaller than the reference power supply V ₅ (V ₇ ) applied to the inverting (-) side of each of the OP amplifiers OP ₅ and OP ₆ . ”Is inverted to“ H level ”through the AND gate (A ₇ ) and the noah gate (N ₁ ), and then turns on the photocoupler (PC ₁ ) to turn on the fan motor (PN). By the comparison voltage of the OP amplifier (OP ₆ ) to drive the indoor fan (PN) strong, medium, weak can be performed normally.

After the heating operation is performed, if the room temperature is larger than the set temperature, the comparison power V ₁ applied to the inverting (-) side of the OP amplifier OP ₃ through the thermistor TH ₁ for indoor temperature is OP. amplifier (OP ₃₎ the non-inverting (+) the reference voltage applied to the side (V ₃₎ than reducing the "H level" to be generated from the output of the OP amplifier (OP ₃₎ a exclude transceiver Iowa gate (EXOR) as the "turn-off" the transistor (Q ₅₎ of transistors (Q ₆₎ and then inverted to "L level" through the aND gate (a ₄₎ through an "off" through and the operation of the photo coupler (PC ₁₎ " By turning off the compressor CM and fan motor PN, the indoor temperature can be maintained at a comfortable temperature.

Therefore, the driving state as described above can be summarized as a diagram that the heat exchange temperature and the set temperature during the defrosting during heating are compared and then regenerated so that unnecessary power loss can be prevented. Off ”so that cold wind can be prevented.

[graph]

As described above, according to the present invention, the temperature setting sensor 20 and the defrosting and valve driving unit 30 compare the set temperature with the room temperature, and then the fan motor driving unit is controlled according to the state signals of the sensing unit and the driving unit. It is possible to control the power loss and unnecessary defrosting operation and to provide a control circuit of the air conditioner to prevent cold wind during the initial heating.

Claims (5)

In the conventional air-conditioning and driving circuit in which the AC power source AC drives the valve BV, the compressor CM, and the fan motor PN to perform a cooling / heating function, the valve BV compressor Pan-Mo is described above. The timer setting unit 10 which allows the on / off operation of the timer to be detected through the light emitting diodes LD ₁ and LD ₂ after setting the driving time of the air conditioning function through the counter CT ₁ . And a temperature setting and sensing unit 20 for controlling the compressor (CM) after the indoor temperature is sensed and set through the comparison function of the OP amplifiers (OP ₁ to OP ₃ ), and the OP amplifier (OP). ₃ ) (OP ₆ ) to make the heat exchange temperature is sensed and then control the valve (VV) and fan motor (PN) to perform the defrosting function and cold wind prevention function during the initial heating and counter ( CT ₂₎ (the defrosting time to be set through the CT ₃₎ and a defrosting valve driving unit 30, a heating and cooling during the After the set temperature and compares the temperature from the temperature setting and the sensor (20) to be compared through an OP amplifier (OP ₄₎ to drive the fan Motor (PN) room that causes an air flow adjusted to about medium strength Fan control unit 40, characterized in that the control circuit of the air conditioner. According to claim 1, Timer setting unit 10 is a power supply (Vcc) passing through the continuous / timer / off selection switch (SW ₁ ), timer on selection switch (SW ₂ ), timer off selection switch (SW ₃ ) is a counter a flip-flop (FF ₁₎ compressor (CM) above to control (FF _2), the valve (BV), fan Motor (PN) of the transistor (Q ₁₎ and then configured to be a control function through a (CT ₁₎ ( Q ₂ ) is a control circuit of a heating and cooling unit configured to drive the light-emitting diode (LD ₁ ) (LD ₂ ) connected to the on-off function of the timer. According to claim 1, the temperature setting and detecting unit 20 is connected to the thermistor (TH ₁ ) for detecting the indoor temperature and the OP amplifier (OP ₁ ) (OP ₂ ) connected to the variable resistor (VR ₂ ) for setting the indoor temperature. Exclusion OA gate (EXOR) and OA gate (OR ₄ ) connected to the air conditioner switch (SW ₅ ) after the power supply (V ₁ ) (V ₂ ) sensed and set is configured to be compared through the OP amplifier (OP ₃ ). Control circuit of a heating and cooling unit configured to control the compressor (CM) by driving the transistor (Q ₅ ) through. The defrosting and valve driving unit 30 of claim 1, the output of the OP amplifier OP ₅ connected to the thermistor TH ₂ for heat exchange temperature sensing is connected to the AND gate A ₄ (A ₅ ) and the flip-flop FF. ₃ ) The automatic driving operation is performed by controlling the valve (VV) driving transistor (Q ₆ ) through the clock pulse (CP) is the gate gate (A ₅ ) (A ₆ ) and the counter (CT ₂ ) (CT ₃ ) The flip-flop FF ₃ is controlled to set the defrost time, and then the outputs of the OP amplifier OP ₆ connected to the thermistor TH ₂ for heat exchange temperature sensing are connected to the AND gate A ₇ and NOA. A control circuit for a heating and cooling unit configured to control a fan motor (N ₁ ) driving photocoupler (PC) through a gate (A ₇ ) to prevent cold wind blowing during initial heating. The method of claim 1, wherein the indoor fan drive unit 40 is set to the temperature setting and the sensing unit 20 and the sensing temperature of the OP as the air-conditioning switching switch SW ₅ selects the analog switches AS _{1 to} AS ₄ . Compared through the amplifier OP ₄ and configured to be applied to the decoder D ₁ through digital signal processing through the A / D converter AD ₁ and the output of (DT ₁ ) generated by the temperature difference (

T <

T ₁ ) (

T <

T <

T ₂ ) (

T>

T ₂ ) is configured to drive transistors (Q ₁₀ -Q ₁₂ ) photocoupler light-emitting and light-receiving elements (PL ₂ -PL ₄ ) (PT ₂ -PT ₄ ) and then through Panax (TD ₁ -TD ₃ ) Control circuit of air conditioners, which controls air heater (PN) so that air-conditioning airflow is adjusted to weak medium steel.

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