A fluorine pump air conditioner control circuit

Abstract

The invention relates to the field of fluorine pump air conditioner control, and discloses a fluorine pump air conditioner control circuit, comprising a second operational amplifier, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first connector, a second connector, a first conversion switch, and a third conversion switch; the second operational amplifier in-phase end is connected to a common end of the third conversion switch, the second operational amplifier inverting end is connected to one end of the third resistor and the common end of the first conversion switch, the second operational amplifier output end is connected to the other end of the third resistor, the first end of the first conversion switch is connected to one end of the sixth resistor, the positive pole of the first conversion switch is connected to the positive pole of the third conversion switch, the first end of the third conversion switch is connected to one end of the fourth resistor and one end of the fifth resistor, the other end of the fourth resistor is connected to the second connector end, the other end of the fifth resistor is connected to the first connector end, and the other end of the sixth resistor, the negative pole of the first conversion switch, the negative pole of the third conversion switch and the grounding end are connected.

Description

Technical Field

[0001] The invention relates to the field of fluorine pump air conditioner control, and in particular to a fluorine pump air conditioner control circuit. Background Art

[0002] The fluorine pump air conditioner has three working modes: compression refrigeration, pressure pump refrigeration, and fluorine pump refrigeration. The three modes are switched by setting the working threshold in the pressure pump refrigeration mode. The compression refrigeration mode is entered when the outdoor temperature is higher than the maximum threshold of the set threshold range, the pressure pump refrigeration mode is entered when the outdoor temperature is within the set threshold range, and the fluorine pump refrigeration mode is entered when the outdoor temperature is lower than the minimum threshold of the set threshold range. The three working modes are respectively suitable for high temperature, transitional, and low temperature outdoor conditions, so that the fluorine pump air conditioner can effectively utilize the outdoor cold source to achieve energy saving while providing a stable refrigeration effect. When the outdoor temperature is within the maximum / minimum threshold of the set threshold range, the temperature change will cause the compressor and the fluorine pump to be repeatedly turned on and off. Therefore, a fluorine pump air conditioner control circuit is proposed, which can automatically establish and convert the limit interval of the start and stop of the compressor / fluorine pump based on the outdoor temperature and prevent the compressor / fluorine pump from being repeatedly turned on and off when the temperature fluctuates, and prevent the compressor / fluorine pump from being turned on and off after the limit interval of the compressor / fluorine pump is converted. Summary of the invention

[0003] In view of the above technical problems, the object of the present invention is to provide a fluorine pump air conditioner control circuit, including a second operational amplifier U2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a first connector P1, a second connector P2, a first conversion switch S1, and a third conversion switch S3;

[0004] The in-phase end of the second operational amplifier U2 is connected to the common end of the third conversion switch S3, the inverting end of the second operational amplifier U2 is connected to one end of the third resistor R3 and the common end of the first conversion switch S1, the output end of the second operational amplifier U2 is connected to the other end of the third resistor R3, the first end of the first conversion switch S1 is connected to one end of the sixth resistor R6, the positive electrode of the first conversion switch S1 is connected to the positive electrode of the third conversion switch S3, the first end of the third conversion switch S3 is connected to one end of the fourth resistor R4 and one end of the fifth resistor R5, the other end of the fourth resistor R4 is connected to the second connector P2, the other end of the fifth resistor R5 is connected to the first connector P1, and the other end of the sixth resistor R6, the negative electrode of the first conversion switch S1, the negative electrode of the third conversion switch S3 and the ground are connected.

[0005] Furthermore, it also includes an eighth operational amplifier U8, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a third connector P3, a fourth connector P4, fifth connectors P5, P6, and a second switch S2;

[0006] The in-phase end of the eighth operational amplifier U8 is connected to one end of the sixteenth resistor R16 and the end of the third connector P3, the inverting end of the eighth operational amplifier U8 is connected to the end of the fifth connector P5, the output end of the eighth operational amplifier U8 is connected to the positive electrode of the first conversion switch S1, the positive electrode of the second switch S2, and the P6 end, one end of the second switch S2 is connected to the common end of the third conversion switch S3, the other end of the second switch S2 is connected to one end of the fourteenth resistor R14, one end of the fifteenth resistor R15 is connected to the second end of the first conversion switch S1, the other end of the fifteenth resistor R15 is connected to the end of the fourth connector P4, the other end of the sixteenth resistor R16 is connected to the second end of the third conversion switch S3, and the other end of the fourteenth resistor R14, the negative electrode of the second switch S2 and the ground end are connected.

[0007] Furthermore, it also includes a first operational amplifier U1, a fourth operational amplifier U4, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a first diode D1, and a second diode D2;

[0008] The in-phase end of the first operational amplifier U1 is connected to the end of the first connector P1, the inverting end of the first operational amplifier U1 is connected to the end of the fifth connector P5, the output end of the first operational amplifier U1 is connected to one end of the ninth resistor R9 and the anode of the second diode D2, the in-phase end of the fourth operational amplifier U4 is connected to one end of the seventh resistor R7, one end of the eighth resistor R8, the cathode of the first diode D1, and the cathode of the second diode D2, the output end of the fourth operational amplifier U4 is connected to the anode of the first diode D1, the other end of the seventh resistor R7 is connected to the power supply, and the other end of the eighth resistor R8 and the other end of the ninth resistor R9 are connected to the ground.

[0009] Furthermore, it also includes a third operational amplifier U3, a first resistor R1, a tenth resistor R10, and a third diode D3;

[0010] The in-phase end of the third operational amplifier U3 is connected to the fifth connector P5, the inverting end of the third operational amplifier U3 is connected to the other end of the third resistor R3, the output end of the third operational amplifier U3 is connected to one end of the tenth resistor R10 and the anode of the third diode D3, the cathode of the third diode D3 is connected to one end of the first resistor R1, one end of the second resistor R2, and the inverting end of the fourth operational amplifier U4, the other end of the first resistor R1 is connected to the power supply, and the other end of the second resistor R2 and the other end of the tenth resistor R10 are connected to the ground.

[0011] Furthermore, it also includes a seventh operational amplifier U7, a twelfth resistor R12, a nineteenth resistor R19, a twentieth resistor R20, and a fifth diode D5;

[0012] The in-phase end of the seventh operational amplifier U7 is connected to the end of the fifth connector P5, the inverting end of the seventh operational amplifier U7 is connected to the end of the third connector P3, the output end of the seventh operational amplifier U7 is connected to one end of the twentieth resistor R20 and the anode of the fifth diode D5, the cathode of the fifth diode D5 is connected to one end of the twelfth resistor R12 and one end of the nineteenth resistor R19, the other end of the twelfth resistor R12 is connected to the power supply, and the other end of the nineteenth resistor R19 and the other end of the twentieth resistor R20 are connected to the ground.

[0013] Furthermore, it also includes a fifth operational amplifier U5, a sixth operational amplifier U6, an eleventh resistor R11, a seventeenth resistor R17, an eighteenth resistor R18, a fourth diode D4, and a sixth diode D6;

[0014] The in-phase end of the fifth operational amplifier U5 is connected to the other end of the third resistor R3, the inverting end of the fifth operational amplifier U5 is connected to the end of the fifth connector P5, the output end of the fifth operational amplifier U5 is connected to one end of the eleventh resistor R11 and the anode of the fourth diode D4, the in-phase end of the sixth operational amplifier U6 is connected to one end of the seventeenth resistor R17, one end of the eighteenth resistor R18, the cathode of the fourth diode D4, and the cathode of the sixth diode D6, the inverting end of the sixth operational amplifier U6 is connected to one end of the nineteenth resistor R19, the output end of the sixth operational amplifier U6 is connected to the anode of the sixth diode D6, and the other end of the eleventh resistor R11, the other end of the seventeenth resistor R17 and the ground end are connected.

[0015] Furthermore, it also includes a first field effect transistor Q1 and a second field effect transistor Q2;

[0016] The drain of the first field effect transistor Q1 is connected to one end of the tenth resistor R10, the gate of the first field effect transistor Q1 is connected to the gate of the second field effect transistor Q2 and the P6 end, the source of the second field effect transistor Q2 is connected to the output end of the fifth operational amplifier U5, and the source of the first field effect transistor Q1, the drain of the second field effect transistor Q2 and the ground end are connected.

[0017] Furthermore, it also includes a thirteenth resistor R13;

[0018] One end of the thirteenth resistor R13 is connected to the gate of the first field effect transistor Q1, and the other end of the thirteenth resistor R13 is connected to the ground.

[0019] The beneficial effects of the present invention compared with the prior art are:

[0020] The present invention can automatically establish and convert the restricted range for starting and closing the compressor / fluorine pump based on the outdoor temperature and prevent the compressor / fluorine pump from being repeatedly started and closed when the temperature fluctuates, and prevent the compressor / fluorine pump from being started and closed after the restricted range of the compressor / fluorine pump is converted. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the prior art and the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 This is a structural diagram of the control circuit provided by the present invention. DETAILED DESCRIPTION

[0023] In order to make the objects and advantages of the present invention more clearly understood, the present invention is specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific implementations of the present invention, and does not strictly limit the scope of protection specifically requested by the present invention.

[0024] The present invention discloses a fluorine pump air conditioner control circuit, comprising a second operational amplifier U2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a first connector P1, a second connector P2, a first conversion switch S1, and a third conversion switch S3;

[0025] The in-phase end of the second operational amplifier U2 is connected to the common end of the third conversion switch S3, the inverting end of the second operational amplifier U2 is connected to one end of the third resistor R3 and the common end of the first conversion switch S1, the output end of the second operational amplifier U2 is connected to the other end of the third resistor R3, the first end of the first conversion switch S1 is connected to one end of the sixth resistor R6, the positive electrode of the first conversion switch S1 is connected to the positive electrode of the third conversion switch S3, the first end of the third conversion switch S3 is connected to one end of the fourth resistor R4 and one end of the fifth resistor R5, the other end of the fourth resistor R4 is connected to the second connector P2, the other end of the fifth resistor R5 is connected to the first connector P1, and the other end of the sixth resistor R6, the negative electrode of the first conversion switch S1, the negative electrode of the third conversion switch S3 and the ground are connected.

[0026] Specifically, it also includes an eighth operational amplifier U8, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a third connector P3, a fourth connector P4, fifth connectors P5, P6, and a second switch S2;

[0027] The in-phase end of the eighth operational amplifier U8 is connected to one end of the sixteenth resistor R16 and the end of the third connector P3, the inverting end of the eighth operational amplifier U8 is connected to the end of the fifth connector P5, the output end of the eighth operational amplifier U8 is connected to the positive electrode of the first conversion switch S1, the positive electrode of the second switch S2, and the P6 end, one end of the second switch S2 is connected to the common end of the third conversion switch S3, the other end of the second switch S2 is connected to one end of the fourteenth resistor R14, one end of the fifteenth resistor R15 is connected to the second end of the first conversion switch S1, the other end of the fifteenth resistor R15 is connected to the end of the fourth connector P4, the other end of the sixteenth resistor R16 is connected to the second end of the third conversion switch S3, and the other end of the fourteenth resistor R14, the negative electrode of the second switch S2 and the ground end are connected.

[0028] Specifically, it also includes a first operational amplifier U1, a fourth operational amplifier U4, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a first diode D1, and a second diode D2;

[0029] The in-phase end of the first operational amplifier U1 is connected to the end of the first connector P1, the inverting end of the first operational amplifier U1 is connected to the end of the fifth connector P5, the output end of the first operational amplifier U1 is connected to one end of the ninth resistor R9 and the anode of the second diode D2, the in-phase end of the fourth operational amplifier U4 is connected to one end of the seventh resistor R7, one end of the eighth resistor R8, the cathode of the first diode D1, and the cathode of the second diode D2, the output end of the fourth operational amplifier U4 is connected to the anode of the first diode D1, the other end of the seventh resistor R7 is connected to the power supply, and the other end of the eighth resistor R8 and the other end of the ninth resistor R9 are connected to the ground.

[0030] Specifically, it also includes a third operational amplifier U3, a first resistor R1, a tenth resistor R10, and a third diode D3;

[0031] The in-phase end of the third operational amplifier U3 is connected to the fifth connector P5, the inverting end of the third operational amplifier U3 is connected to the other end of the third resistor R3, the output end of the third operational amplifier U3 is connected to one end of the tenth resistor R10 and the anode of the third diode D3, the cathode of the third diode D3 is connected to one end of the first resistor R1, one end of the second resistor R2, and the inverting end of the fourth operational amplifier U4, the other end of the first resistor R1 is connected to the power supply, and the other end of the second resistor R2 and the other end of the tenth resistor R10 are connected to the ground.

[0032] Specifically, it also includes a seventh operational amplifier U7, a twelfth resistor R12, a nineteenth resistor R19, a twentieth resistor R20, and a fifth diode D5;

[0033] The in-phase end of the seventh operational amplifier U7 is connected to the end of the fifth connector P5, the inverting end of the seventh operational amplifier U7 is connected to the end of the third connector P3, the output end of the seventh operational amplifier U7 is connected to one end of the twentieth resistor R20 and the anode of the fifth diode D5, the cathode of the fifth diode D5 is connected to one end of the twelfth resistor R12 and one end of the nineteenth resistor R19, the other end of the twelfth resistor R12 is connected to the power supply, and the other end of the nineteenth resistor R19 and the other end of the twentieth resistor R20 are connected to the ground.

[0034] Specifically, it also includes a fifth operational amplifier U5, a sixth operational amplifier U6, an eleventh resistor R11, a seventeenth resistor R17, an eighteenth resistor R18, a fourth diode D4, and a sixth diode D6;

[0035] The in-phase end of the fifth operational amplifier U5 is connected to the other end of the third resistor R3, the inverting end of the fifth operational amplifier U5 is connected to the end of the fifth connector P5, the output end of the fifth operational amplifier U5 is connected to one end of the eleventh resistor R11 and the anode of the fourth diode D4, the in-phase end of the sixth operational amplifier U6 is connected to one end of the seventeenth resistor R17, one end of the eighteenth resistor R18, the cathode of the fourth diode D4, and the cathode of the sixth diode D6, the inverting end of the sixth operational amplifier U6 is connected to one end of the nineteenth resistor R19, the output end of the sixth operational amplifier U6 is connected to the anode of the sixth diode D6, and the other end of the eleventh resistor R11, the other end of the seventeenth resistor R17 and the ground end are connected.

[0036] Specifically, it also includes a first field effect transistor Q1 and a second field effect transistor Q2;

[0037] The drain of the first field effect transistor Q1 is connected to one end of the tenth resistor R10, the gate of the first field effect transistor Q1 is connected to the gate of the second field effect transistor Q2 and the P6 end, the source of the second field effect transistor Q2 is connected to the output end of the fifth operational amplifier U5, and the source of the first field effect transistor Q1, the drain of the second field effect transistor Q2 and the ground end are connected.

[0038] Specifically, it also includes a thirteenth resistor R13;

[0039] One end of the thirteenth resistor R13 is connected to the gate of the first field effect transistor Q1, and the other end of the thirteenth resistor R13 is connected to the ground.

[0040] The working principle of the present invention is as follows: the first connector P1 end feeds back the outdoor temperature signal when the fluorine pump is allowed to be turned on, the second connector P2 end feeds back the reference signal of the upper limit of the floating allowable limit of the temperature signal when the fluorine pump is turned on, the higher the signal amplitude is, the higher the utilization rate of the fluorine pump for the outdoor cold source is, the third connector P3 end feeds back the outdoor temperature signal when the compressor is allowed to be turned off, the fourth connector P4 end feeds back the reference signal of the lower limit of the floating allowable limit of the temperature signal when the compressor is turned off, the signals of the first connector P1, the second connector P2, the third connector P3 and the fourth connector P4 end are fed back to the control circuit by the terminal, and are set on the terminal as required according to the performance of the fluorine pump and the compressor, the fifth connector P5 end feeds back the outdoor temperature signal, and the signal of the fifth connector P5 end is provided by the temperature sensor, when the outdoor temperature is higher than the outdoor temperature signal when the fluorine pump is allowed to be turned on, the compressor is used for single refrigeration, when the outdoor temperature is lower than the outdoor temperature signal when the compressor is allowed to be turned off, the fluorine pump is used for single refrigeration, and when the outdoor temperature is between the outdoor temperature signal when the fluorine pump is allowed to be turned on and the outdoor temperature signal when the compressor is allowed to be turned off, the compressor / fluorine pump are used for mixed refrigeration.

[0041] Taking into account that the outdoor temperature signal amplitude when the fluorine pump is allowed to be turned on / the outdoor temperature signal amplitude when the compressor is allowed to be turned off fluctuates up and down, which will cause the fluorine pump / compressor to be repeatedly turned on and off, it is necessary to establish and convert the limit interval for turning on and off the fluorine pump / compressor when the outdoor temperature is higher than / lower than the outdoor temperature signal amplitude when the compressor is allowed to be turned off to prevent the fluorine pump / compressor from being repeatedly turned on and off. The signal at the first connector P1 end is fed back to the in-phase end of the second operational amplifier U2 through the fifth resistor R5 and the third conversion switch S3, and the signal at the second connector P2 end is fed back to the in-phase end of the second operational amplifier U2 through the fourth resistor R4 and the third conversion switch S3. The output end of the second operational amplifier U2 is negatively feedback connected to the inverting end of the second operational amplifier U2 through the third resistor R3, and the signal at the inverting end of the second operational amplifier U2 is connected to the ground end through the first conversion switch S1 and the sixth resistor R6, so that the signal at the output end of the second operational amplifier U2 is the closing limit signal of the fluorine pump. At this time, the signal amplitude at the output end of the second operational amplifier U2 and the signal amplitude at the first connector P1 end are the limit interval for turning on and off the fluorine pump. The signal at the third connector P3 is fed back to the in-phase terminal of the eighth operational amplifier U8, the signal at the fifth connector P5 is fed back to the inverting terminal of the eighth operational amplifier U8, and the eighth operational amplifier U8 is output. The signal at the output terminal of the eighth operational amplifier U8 is fed back to the first conversion switch S1, the second switch S2, and the third conversion switch S3 power input terminal. The first conversion switch S1 and the third conversion switch S3 are switched, the second switch S2 is energized, and the signal at the third connector P3 is fed back to the in-phase terminal of the second operational amplifier U2 through the sixteenth resistor R16 and the third conversion switch S3, and the other path is fed back to the ground terminal through the second switch S2 and the fourteenth resistor R14. The signal at the fourth connector P4 is fed back to the inverting terminal of the second operational amplifier U2 through the fifteenth resistor R15 and the first conversion switch S1, so that the signal at the output terminal of the second operational amplifier U2 is converted into a closing limit signal of the compressor. At this time, the signal amplitude at the output terminal of the second operational amplifier U2 and the signal amplitude at the third connector P3 are the limit intervals for the start and close of the compressor, so that the control circuit can automatically establish and convert the limit intervals for the start and close of the compressor / fluorine pump based on the outdoor temperature.

[0042] When the restriction interval of the fluorine pump on and off is established, and the outdoor temperature signal is lower than the outdoor temperature signal when the fluorine pump is allowed to be turned on, the signal at the first connector P1 end is fed back to the in-phase end of the first operational amplifier U1, and the signal at the fifth connector P5 end is fed back to the inverting end of the first operational amplifier U1, and the first operational amplifier U1 outputs, the power supply signal passes through the first resistor R1 and the second resistor R2 to the ground end, the signal at the second resistor R2 end is fed back to the inverting end of the fourth operational amplifier U4, the power supply signal passes through the seventh resistor R7 and the eighth resistor R8 to the ground end, the signal at the eighth resistor R8 end is fed back to the in-phase end of the fourth operational amplifier U4, the signal at the output end of the first operational amplifier U1 passes through the ninth resistor R9 to the ground end, the signal at the ninth resistor R9 passes through the second diode D2 and the eighth resistor R8 to the ground end, the signal amplitude at the eighth resistor R8 end increases, and the fourth operational amplifier U4 outputs, the signal at the output end of the fourth operational amplifier U4 is the fluorine pump start signal, at this time the fluorine pump is turned on, and the fluorine pump is in medium power mode During operation, the compressor reduces power to stabilize the cooling effect. At the same time, the signal at the output end of the fourth operational amplifier U4 passes through the first diode D1 and the eighth resistor R8 to the ground end, so that the fourth operational amplifier U4 is in a normal output state. When the outdoor temperature rises, the first operational amplifier U1 is cut off, and the fourth operational amplifier U4 maintains output. At this time, the compressor increases power to stabilize the cooling effect. When the outdoor temperature rises to the upper limit amplitude of the limit range, the signal at the fifth connector P5 end is fed back to the in-phase end of the third operational amplifier U3, and the signal at the output end of the second operational amplifier U2 is fed back to the inverting end of the third operational amplifier U3, and the third operational amplifier U3 outputs. The signal at the output end of the third operational amplifier U3 passes through the tenth resistor R10 to the ground end. The signal at the tenth resistor R10 passes through the third diode D3 and the second resistor R2 to the ground end. The signal amplitude at the second resistor R2 increases, the fourth operational amplifier U4 is cut off, and the fluorine pump is turned off. At this time, the compressor continues to increase power to stabilize the cooling effect.

[0043] When the limit range of compressor start and stop is established, the compressor is maintained in low-power operation mode and cannot continue to reduce power to achieve energy saving. Therefore, when the eighth operational amplifier U8 outputs, the output signal of the eighth operational amplifier U8 is synchronously fed back to the frequency conversion unit of the fluorine pump. The output signal of the eighth operational amplifier U8 is the frequency modulation authority signal of the fluorine pump. When the frequency conversion unit obtains the signal, it can modulate the frequency of the fluorine pump and reset it when the signal is lost. When the outdoor temperature signal changes within the limit range of compressor start and stop, the frequency conversion unit increases / decreases the working power of the fluorine pump to stabilize the control. The purpose of energy saving is achieved while cooling. When the outdoor temperature signal is lower than the lower limit amplitude of the limit interval when the compressor is allowed to be turned off, the signal at the output end of the second operational amplifier U2 is fed back to the in-phase end of the fifth operational amplifier U5, and the signal at the end of the fifth connector P5 is fed back to the inverting end of the fifth operational amplifier U5. The fifth operational amplifier U5 outputs, and the power supply signal passes through the twelfth resistor R12 and the nineteenth resistor R19 to the ground end. The signal at the end of the nineteenth resistor R19 is fed back to the inverting end of the sixth operational amplifier U6. The power supply signal passes through the eighteenth resistor R18 and the seventeenth resistor R17 to the ground end. The signal at the end of the seventeenth resistor R17 is fed back to the in-phase end of the sixth operational amplifier U6, and the sixth operational amplifier U6 outputs. The signal at the output end of the sixth operational amplifier U6 is a compressor shutdown signal. At this time, the compressor is turned off, and the fluorine pump increases the power to stabilize the refrigeration effect. At the same time, the signal at the output end of the sixth operational amplifier U6 passes through the sixth diode D6 and the seventeenth resistor R17 to the ground end to make the sixth operational amplifier U6 in a normal output state. When the outdoor temperature rises, the fifth operational amplifier U5 is cut off, and the sixth operational amplifier U6 maintains output. At this time, the fluorine pump continues to increase the power to stabilize the refrigeration effect When the outdoor temperature rises back to the upper limit amplitude of the limit interval, the signal at the third connector P3 end is fed back to the inverting end of the seventh operational amplifier U7, the signal at the fifth connector P5 end is fed back to the non-inverting end of the seventh operational amplifier U7, the seventh operational amplifier U7 outputs, the signal at the output end of the seventh operational amplifier U7 passes through the twentieth resistor R20 to the ground end, the signal at the twentieth resistor R20 passes through the fifth diode D5 and the nineteenth resistor R19 to the ground end, the amplitude of the signal at the nineteenth resistor R19 increases, the sixth operational amplifier U6 is turned off, the compressor is turned on, and the eighth operational amplifier U8 is turned off.

[0044] The output signal of the eighth operational amplifier U8 is synchronously fed back to the gate of the first field effect tube Q1 and the gate of the second field effect tube Q2. The thirteenth resistor R13 is used to discharge the parasitic capacitance of the gate of the first field effect tube Q1 and the gate of the second field effect tube Q2. When the eighth operational amplifier U8 outputs, the voltage difference between the gate of the first field effect tube Q1 and the source of the first field effect tube Q1 is higher than the conduction threshold, the first field effect tube Q1 is turned on, and the output signal of the third operational amplifier U3 is connected to the ground terminal through the drain of the first field effect tube Q1 and the source of the first field effect tube Q1, thereby establishing a limit interval for starting and closing the compressor. When the eighth operational amplifier U8 is turned off, the voltage difference between the gate of the second field effect transistor Q2 and the source of the second field effect transistor Q2 is lower than the conduction threshold, the second field effect transistor Q2 is turned on, and the signal at the output end of the fifth operational amplifier U5 is connected to the ground terminal through the source of the second field effect transistor Q2 and the drain of the second field effect transistor Q2. When the limit interval of the start and close of the fluorine pump is established, the signal amplitude at the end of the twentieth resistor R20 is limited to rise, causing the compressor to shut down. When the limit interval of the compressor / fluorine pump is converted, the compressor / fluorine pump is prevented from starting and closing.

[0045] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. A fluorine pump air conditioning control circuit, characterized in that: It includes a second operational amplifier, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first connector, a second connector, a first conversion switch, and a third conversion switch; The in-phase end of the second operational amplifier is connected to the common end of the third conversion switch, the inverting end of the second operational amplifier is connected to one end of the third resistor and the common end of the first conversion switch, the output end of the second operational amplifier is connected to the other end of the third resistor, the first end of the first conversion switch is connected to one end of the sixth resistor, the positive pole of the first conversion switch is connected to the positive pole of the third conversion switch, the first end of the third conversion switch is connected to one end of the fourth resistor and one end of the fifth resistor, the other end of the fourth resistor is connected to the second connector end, the other end of the fifth resistor is connected to the first connector end, the other end of the sixth resistor, the negative pole of the first conversion switch, the negative pole of the third conversion switch and the ground end are connected, the first connector end feeds back the outdoor temperature signal when the fluorine pump is allowed to be turned on, and the second connector end feeds back the reference signal of the allowable floating upper limit of the temperature signal when the fluorine pump is turned on.

2. The fluorine pump air conditioning control circuit according to claim 1, characterized in that: Also includes an eighth operational amplifier, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a third connector, a fourth connector, a fifth connector, P6, and a second switch; The in-phase end of the eighth operational amplifier is connected to one end of the sixteenth resistor and the third connector end, the inverting end of the eighth operational amplifier is connected to the fifth connector end, the output end of the eighth operational amplifier is connected to the positive electrode of the first conversion switch, the positive electrode of the second switch, and the P6 end, one end of the second switch is connected to the common end of the third conversion switch, the other end of the second switch is connected to one end of the fourteenth resistor, one end of the fifteenth resistor is connected to the second end of the first conversion switch, the other end of the fifteenth resistor is connected to the fourth connector end, the other end of the sixteenth resistor is connected to the second end of the third conversion switch, the other end of the fourteenth resistor, the negative electrode of the second switch and the ground end are connected, the third connector end feeds back the outdoor temperature signal when the compressor is allowed to be turned off, the fourth connector end feeds back the reference signal of the lower limit of the temperature signal allowed to float when the compressor is turned off, the fifth connector end feeds back the outdoor temperature signal, and the P6 end feeds back the fluorine pump frequency modulation authority signal.

3. The fluorine pump air conditioning control circuit according to claim 2, characterized in that: It also includes a first operational amplifier, a fourth operational amplifier, a seventh resistor, an eighth resistor, a ninth resistor, a first diode, and a second diode; The in-phase end of the first operational amplifier is connected to the first connector end, the inverting end of the first operational amplifier is connected to the fifth connector end, the output end of the first operational amplifier is connected to one end of the ninth resistor and the anode of the second diode, the in-phase end of the fourth operational amplifier is connected to one end of the seventh resistor, one end of the eighth resistor, the cathode of the first diode, and the cathode of the second diode, the output end of the fourth operational amplifier is connected to the anode of the first diode, the other end of the seventh resistor is connected to the power supply, and the other ends of the eighth resistor and the other ends of the ninth resistor are connected to the ground end.

4. The fluorine pump air conditioning control circuit according to claim 3, characterized in that: Also includes a third operational amplifier, a first resistor, a tenth resistor, and a third diode; The in-phase end of the third operational amplifier is connected to the fifth connector, the inverting end of the third operational amplifier is connected to the other end of the third resistor, the output end of the third operational amplifier is connected to one end of the tenth resistor and the anode of the third diode, the cathode of the third diode is connected to one end of the first resistor, one end of the second resistor, and the inverting end of the fourth operational amplifier, the other end of the first resistor is connected to the power supply, and the other end of the second resistor, the other end of the tenth resistor are connected to the ground.

5. The fluorine pump air conditioner control circuit according to claim 2, characterized in that: Also includes a seventh operational amplifier, a twelfth resistor, a nineteenth resistor, a twentieth resistor, and a fifth diode; The non-inverting end of the seventh operational amplifier is connected to the fifth connector end, the inverting end of the seventh operational amplifier is connected to the third connector end, the output end of the seventh operational amplifier is connected to one end of the twentieth resistor and the anode of the fifth diode, the cathode of the fifth diode is connected to one end of the twelfth resistor and one end of the nineteenth resistor, the other end of the twelfth resistor is connected to the power supply, and the other end of the nineteenth resistor and the other end of the twentieth resistor are connected to the ground end.

6. The fluorine pump air conditioner control circuit according to claim 5, characterized in that: Also includes a fifth operational amplifier, a sixth operational amplifier, an eleventh resistor, a seventeenth resistor, an eighteenth resistor, a fourth diode, and a sixth diode; The non-inverting end of the fifth operational amplifier is connected to the other end of the third resistor, the inverting end of the fifth operational amplifier is connected to the fifth connector end, the output end of the fifth operational amplifier is connected to one end of the eleventh resistor and the anode of the fourth diode, the non-inverting end of the sixth operational amplifier is connected to one end of the seventeenth resistor, one end of the eighteenth resistor, the cathode of the fourth diode, and the cathode of the sixth diode, the inverting end of the sixth operational amplifier is connected to one end of the nineteenth resistor, the output end of the sixth operational amplifier is connected to the anode of the sixth diode, and the other end of the eleventh resistor, the other end of the seventeenth resistor and the ground end are connected.

7. The fluorine pump air conditioner control circuit according to claim 4, characterized in that: Also includes a first field effect transistor and a second field effect transistor; The drain of the first field effect transistor is connected to one end of the tenth resistor, the gate of the first field effect transistor is connected to the gate of the second field effect transistor and the P6 end, the source of the second field effect transistor is connected to the output end of the fifth operational amplifier, and the source of the first field effect transistor, the drain of the second field effect transistor and the ground end are connected.

8. The fluorine pump air conditioner control circuit according to claim 7, characterized in that: A thirteenth resistor is also included; One end of the thirteenth resistor is connected to the gate of the first field effect transistor, and the other end of the thirteenth resistor is connected to the ground end.

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