Inverter air conditioner control circuit

Abstract

The utility model specifically relates to a variable frequency air conditioner control circuit, including a resistance-capacitance circuit and a rectifier circuit, the rectifier circuit is connected with a first relay K1 and a socket CZ, the socket CZ is equipped with a heating tube, the rectifier circuit is connected with a control chip IC1, the control chip IC1 is connected with a fourth temperature sensor VD4, the fourth temperature sensor VD4 is connected with a first transistor VT1, the first transistor VT1 is connected with a red light emitting diode HD, the 13th pin of the control chip IC1 is connected with a second transistor VT2, the second transistor VT2 is connected with a second relay K2, the second relay K2 is connected with a green light emitting diode LED and a sixth temperature sensor VD6 in parallel, and the second relay K2 is also connected with a U1 terminal. The beneficial effect of the utility model is that the control chip IC1 detects temperature changes through the fourth temperature sensor VD4 and the sixth temperature sensor VD6, so that the air conditioner as a whole can achieve an energy saving effect of more than 50% and the indoor temperature is controlled within ±0.1°C.

Description

Technical Field

[0001] The utility model specifically relates to a variable frequency air conditioner control circuit. Background Art

[0002] Because the variable frequency air conditioner can adjust the operating speed of the air conditioner refrigeration unit at any time through the built-in inverter, so as to achieve reasonable use of energy. Since its refrigeration unit will not be turned on frequently, it will keep the refrigeration unit in a stable working state, which can achieve an overall energy saving effect of more than 30%. The current variable frequency air conditioner can control the cooling (heating) capacity of the air conditioner by changing the speed of the refrigeration unit. Its cooling (heating) capacity has a variable range. For example, the cooling capacity of the 36GW variable frequency unit varies from 360 W to 400 W, and the heating capacity varies from 300 W to 6800 W, which can control the indoor temperature to ±1°C. Summary of the invention

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a variable frequency air conditioner control circuit, which can achieve an overall energy saving effect of more than 50% for the air conditioner and the variable frequency air conditioner can control the indoor temperature within ±0.1℃.

[0004] According to the utility model, a variable frequency air conditioner control circuit includes a resistor-capacitor circuit and a rectifier circuit, which are connected to each other. A front input end of the rectifier circuit is connected to a first relay K1 and a socket CZ, the first relay K1 and the socket CZ are connected in series, a heating tube is installed in the socket CZ, an output end of the rectifier circuit is connected to a control chip IC1, pin 3 of the control chip IC1 is connected to a fourth temperature sensor VD4, one end of the fourth temperature sensor VD4 is connected to a first transistor VT1, a base of the first transistor VT1 is connected to a red light emitting diode HD, pin 13 of the control chip IC1 is connected to a second transistor VT2, a collector of the second transistor VT2 is connected to a second relay K2, a green light emitting diode LED and a sixth temperature sensor VD6 are connected in parallel to the second relay K2, and the second relay K2 is also connected to a U1 end, which is connected to a refrigerator.

[0005] Specifically, the resistor-capacitor circuit includes a first resistor R1 and a first capacitor C1, the first resistor R1 and the first capacitor C1 are connected in parallel, the rectifier circuit includes a first diode VD1, a second diode VD2 and a third diode VD3, the second diode VD2 and the third diode VD3 are connected through a second resistor R2, and the third diode VD3 and the second capacitor C2 are connected in parallel.

[0006] Specifically, the base of the first transistor VT1 is connected to the red light emitting diode HD via a third resistor R3, and the red light emitting diode HD is connected in parallel to the third diode VD3.

[0007] Specifically, the control chip IC1 has a model number of CD4013, and the control chip IC1 includes a front chip ICa and a rear chip ICb, wherein pin 1 of the front chip ICa is connected to pin 11 of the rear chip ICb, the fourth temperature sensor VD4 has a model number of 1N4148, and the sixth temperature sensor VD6 has a model number of 1N4148.

[0008] Specifically, pin 6 of the front chip ICa is connected to switch S, the switch S is connected in parallel with the sixth capacitor C6, pin 4 of the front chip ICa is connected to the seventh capacitor C7, the common end between pin 4 of the front chip ICa and the seventh capacitor C7 is connected to the sixth resistor R6, and the other end of the sixth resistor R6 is connected to the common end between pin 1 of the front chip ICa and pin 11 of the rear chip ICb.

[0009] Specifically, the pin 10 of the rear chip ICb is connected to the seventh resistor R7, the pin 6 of the front chip ICa is also connected to the eighth resistor R8 and the fifth temperature sensor VD5, the fifth temperature sensor VD5 is connected to the ninth resistor R9, and the other ends of the eighth resistor R8 and the ninth resistor R9 are connected to the pin 13 of the rear chip ICb.

[0010] Specifically, the green light emitting diode LED is connected to an eleventh resistor R11, and the base of the second transistor VT2 is further connected to a tenth resistor R10.

[0011] The beneficial effects of the utility model are as follows: the structure detects temperature changes through the control chip IC1 through the fourth temperature sensor VD4 and the sixth temperature sensor VD6 respectively, which can make the air conditioner achieve an energy saving effect of more than 50% as a whole and the variable frequency air conditioner can control the indoor temperature within ±0.1°C. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings.

[0013] Figure 1 It is a control circuit diagram of the utility model. DETAILED DESCRIPTION

[0014] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0015] Reference below Figure 1A variable frequency air conditioner control circuit according to an embodiment of the utility model is described, including a resistor-capacitor circuit and a rectifier circuit, which are connected to the rectifier circuit, and is characterized in that: a front input end of the rectifier circuit is connected to a first relay K1 and a socket CZ, the first relay K1 and the socket CZ are connected in series, the socket CZ is installed with a heating tube, the output end of the rectifier circuit is connected to a control chip IC1, pin 3 of the control chip IC1 is connected to a fourth temperature sensor VD4, one end of the fourth temperature sensor VD4 is connected to a first transistor VT1, the base of the first transistor VT1 is connected to a red light emitting diode HD, pin 13 of the control chip IC1 is connected to a second transistor VT2, the collector of the second transistor VT2 is connected to a second relay K2, the second relay K2 is connected in parallel with a green light emitting diode LED and a sixth temperature sensor VD6, the second relay K2 is also connected to a U1 end, and the U1 end is connected to a refrigerator.

[0016] This structure detects temperature changes through the fourth temperature sensor VD4 and the sixth temperature sensor VD6 through the control chip IC1, which can make the air conditioner achieve an overall energy saving effect of more than 50% and the variable frequency air conditioner can control the indoor temperature within ±0.1℃.

[0017] Specifically, the 220V AC power supply inputs the RC circuit and the rectifier circuit, the rectifier circuit supplies power to the control chip IC1, and the control chip IC1 detects the temperature through the fourth temperature sensor VD4 and the sixth temperature sensor VD6, respectively, and the measurement temperature range is -65°C to 200°C. The fourth temperature sensor VD4 detects the heat generated by the heating tube, and the sixth temperature sensor VD6 detects the refrigerant temperature output by the refrigerator, and cooperates with the control chip IC1 to control the operation of the second relay K2 and the first relay K1, respectively, to realize the conversion control of heating and cooling, and control the temperature of the controlled object within the required range, and the control temperature accuracy reaches ±0.1°C.

[0018] The fourth temperature sensor VD4 and the sixth temperature sensor VD68 are used to collect temperature signals, which are differentially amplified and sent to the pre-debugged related temperature control chip IC1 for comparison.

[0019] When the temperature is lower than the lower limit of the control temperature, the red light emitting diode HD lights up, the first relay K1 acts, and the heating tube starts to heat up. When the temperature is higher than the upper limit of the control temperature, the green light emitting diode LED lights up, the second relay K2 acts, and the refrigerator starts to cool.

[0020] When the temperature is between the upper and lower limits of the set temperature, the red light emitting diode HD and the green light emitting diode LED are all off, the first relay K1 and the second relay K2 are all disconnected, and neither heating nor cooling is performed. Therefore, the temperature and temperature control conditions can be known from the above different state displays. One end of the second relay K2 is turned on and off through the second transistor VT2.

[0021] Specifically, the RC circuit includes a first resistor R1 and a first capacitor C1, the first resistor R1 and the first capacitor C1 are connected in parallel, the rectifier circuit includes a first diode VD1, a second diode VD2 and a third diode VD3, the second diode VD2 and the third diode VD3 are connected through a second resistor R2, and the third diode VD3 and the second capacitor C2 are connected in parallel. The RC circuit suppresses voltage rise; and effectively controls the forward voltage rise rate during the forward blocking period of the rectifier element to avoid mis-conduction of the rectifier element due to high dv / dt. In addition, the rectifier circuit is used to convert into direct current.

[0022] Specifically, the base of the first transistor VT1 is connected to the red light emitting diode HD via a third resistor R3, and the third resistor R3 serves to protect the base of the first transistor VT1; the red light emitting diode HD is connected in parallel to the third diode VD3.

[0023] Specifically, the control chip IC1 has a model number of CD4013, and the control chip IC1 includes a front chip ICa and a rear chip ICb, wherein pin 1 of the front chip ICa is connected to pin 11 of the rear chip ICb, the fourth temperature sensor VD4 has a model number of 1N4148, and the sixth temperature sensor VD6 has a model number of 1N4148.

[0024] Specifically, pin 6 of the front chip ICa is connected to switch S, which plays the role of opening or closing. The switch S is connected in parallel with a sixth capacitor C6, which plays the role of buffering voltage; pin 4 of the front chip ICa is connected to a seventh capacitor C7, and the common end between pin 4 of the front chip ICa and the seventh capacitor C7 is connected to a sixth resistor R6, and the other end of the sixth resistor R6 is connected to the common end between pin 1 of the front chip ICa and pin 11 of the rear chip ICb.

[0025] Specifically, the 10th pin of the rear chip ICb is connected to the seventh resistor R7, the 6th pin of the front chip ICa is also connected to the eighth resistor R8 and the fifth temperature sensor VD5, the fifth temperature sensor VD5 is connected to the ninth resistor R9, and the other ends of the eighth resistor R8 and the ninth resistor R9 are connected to the 13th pin of the rear chip ICb. The fifth temperature sensor VD5 is used to detect the temperature of the air blowing and implement feedback to the 10th pin of the rear chip ICb.

[0026] Specifically, the green light emitting diode LED is connected to an eleventh resistor R11, which is used to protect the green light emitting diode LED. The base of the second transistor VT2 is also connected to a tenth resistor R10, which is used to protect the base of the second transistor VT2.

[0027] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A variable frequency air conditioner control circuit, comprising a resistor-capacitor circuit and a rectifier circuit, wherein the resistor-capacitor circuit and the rectifier circuit are connected, and characterized in that: The front input end of the rectifier circuit is connected to the first relay K1 and the socket CZ, the first relay K1 and the socket CZ are connected in series, the socket CZ is installed with a heating tube, the output end of the rectifier circuit is connected to the control chip IC1, the 3rd pin of the control chip IC1 is connected to the fourth temperature sensor VD4, one end of the fourth temperature sensor VD4 is connected to the first transistor VT1, the base of the first transistor VT1 is connected to the red light emitting diode HD, the 13th pin of the control chip IC1 is connected to the second transistor VT2, the collector of the second transistor VT2 is connected to the second relay K2, the second relay K2 is connected in parallel with the green light emitting diode LED and the sixth temperature sensor VD6, the second relay K2 is also connected to the U1 end, and the U1 end is connected to the refrigerator.

2. The variable frequency air conditioner control circuit according to claim 1, characterized in that: The RC circuit includes a first resistor R1 and a first capacitor C1, which are connected in parallel. The rectifier circuit includes a first diode VD1, a second diode VD2 and a third diode VD3, which are connected to each other via a second resistor R2, and the third diode VD3 is connected in parallel to the second capacitor C2.

3. The variable frequency air conditioner control circuit according to claim 2, characterized in that: The base of the first transistor VT1 is connected to the red light emitting diode HD via a third resistor R3, and the red light emitting diode HD is connected in parallel to the third diode VD3.

4. The variable frequency air conditioner control circuit according to claim 1, characterized in that: The control chip IC1 has a model of CD4013, and includes a front chip ICa and a rear chip ICb, wherein pin 1 of the front chip ICa is connected to pin 11 of the rear chip ICb, the fourth temperature sensor VD4 has a model of 1N4148, and the sixth temperature sensor VD6 has a model of 1N4148.

5. The variable frequency air conditioner control circuit according to claim 4, characterized in that: Pin 6 of the front chip ICa is connected to switch S, which is connected in parallel with the sixth capacitor C6. Pin 4 of the front chip ICa is connected to the seventh capacitor C7. The common end between pin 4 of the front chip ICa and the seventh capacitor C7 is connected to the sixth resistor R6. The other end of the sixth resistor R6 is connected to the common end between pin 1 of the front chip ICa and pin 11 of the rear chip ICb.

6. The variable frequency air conditioner control circuit according to claim 4, characterized in that: Pin 10 of the rear chip ICb is connected to the seventh resistor R7, pin 6 of the front chip ICa is also connected to the eighth resistor R8 and the fifth temperature sensor VD5, the fifth temperature sensor VD5 is connected to the ninth resistor R9, and the other ends of the eighth resistor R8 and the ninth resistor R9 are connected to pin 13 of the rear chip ICb.

7. The variable frequency air conditioner control circuit according to claim 1, characterized in that: The green light emitting diode LED is connected to an eleventh resistor R11 , and the base of the second transistor VT2 is further connected to a tenth resistor R10 .

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