Variable frequency air conditioning unit electronic expansion valve adjusting system and method

Abstract

The invention relates to a variable frequency air conditioning unit electronic expansion valve adjusting system and method.According to the variable frequency air conditioning unit electronic expansion valve adjusting system, an indoor unit cooperates with an outdoor unit to complete the gas circulation process, and in the gas circulation process, a first sensor set detects the operation state of the outdoor unit in real time; the second sensor group detects the running state of the indoor unit in real time, and detection data of the first sensor group and detection data of the second sensor group are sent to the controller; the controller adjusts the working state of the first electronic expansion valve or the second electronic expansion valve according to the detection data of the first sensor group and the detection data of the second sensor group, so that the control precision of the controller on the whole unit is improved, and it is ensured that the whole system can operate efficiently.

Description

Technical Field

[0001] The present application relates to the technical field of air-conditioning equipment, and in particular to an electronic expansion valve adjustment system and method for a variable frequency air-conditioning unit. Background Art

[0002] Inverter air conditioner refers to a conventional air conditioner with an inverter installed. The compressor is the heart of the air conditioner, and its speed directly affects the efficiency of the air conditioner. The inverter is a control system used to control and adjust the compressor speed, so that it is always in the best speed state, thereby improving the energy efficiency ratio (saving at least 30% energy compared to conventional air conditioners). The basic structure and refrigeration principle of the inverter air conditioner are exactly the same as those of ordinary air conditioners. The host of the inverter air conditioner is automatically variable in speed, and it can automatically provide the required cooling (heating) according to the room conditions.

[0003] Electronic expansion valve is a commonly used component in variable frequency air conditioners. It is a throttling element that can control the flow of refrigerant entering the refrigeration unit according to a preset program. Electronic expansion valve combined with compressor variable capacity technology has been increasingly widely used in some occasions with drastic load changes or a wide range of operating conditions.

[0004] The existing control scheme of variable frequency air conditioning units does not accurately control the electronic expansion valve, which can easily cause the suction superheat of the variable frequency air conditioning units to fluctuate. In severe cases, it may even cause the compressor to run with liquid, resulting in compressor damage. Summary of the invention

[0005] Based on this, it is necessary to provide an electronic expansion valve adjustment system and method for a variable frequency air-conditioning unit in response to the problem that the existing control scheme of the variable frequency air-conditioning unit is inaccurate in the control of the electronic expansion valve, which may easily cause the suction superheat of the variable frequency air-conditioning unit to fluctuate, and in severe cases may even cause the compressor to run with liquid, leading to damage to the compressor.

[0006] On the one hand, the present application provides an electronic expansion valve regulation system for a variable frequency air conditioning unit, comprising:

[0007] Outdoor unit;

[0008] Indoor unit;

[0009] Controller;

[0010] a first electronic expansion valve, the first electronic expansion valve being in communication with the outdoor unit, and the first electronic expansion valve being electrically connected to the controller;

[0011] a second electronic expansion valve, the second electronic expansion valve being in communication with the indoor unit, and the second electronic expansion valve being electrically connected to the controller;

[0012] a first sensor group, wherein the first sensor group is arranged in the outdoor unit and the operating state of the outdoor unit is detected by the first sensor group;

[0013] The second sensor group is arranged in the indoor unit, and the operating state of the indoor unit is detected by the second sensor group.

[0014] On the other hand, the present application also provides a method for adjusting an electronic expansion valve of a variable frequency air conditioner unit, the method for adjusting an electronic expansion valve of a variable frequency air conditioner unit comprising:

[0015] Set the compressor inlet temperature preset value b, the compressor outlet temperature preset value c and the temperature difference threshold value c;

[0016] Setting a first judgment condition, a second judgment condition and a third judgment condition;

[0017] Acquire detection data of the first sensor group and detection data of the second sensor group;

[0018] Based on the detection data of the first sensor group and the detection data of the second sensor group, determining whether the detection data of the first sensor group and the detection data of the second sensor group meet a first determination condition;

[0019] If the detection data of the first sensor group and the detection data of the second sensor group meet the first judgment condition, then judging whether the detection data of the first sensor group and the detection data of the second sensor group meet the second judgment condition;

[0020] If the detection data of the first sensor group and the detection data of the second sensor group meet the second judgment condition, then judging whether the detection data of the first sensor group and the detection data of the second sensor group meet the third judgment condition;

[0021] If the detection data of the first sensor group and the detection data of the second sensor group do not satisfy the third judgment condition, the adjustment steps of the second electronic expansion valve are calculated, and the opening degree of the second electronic expansion valve is adjusted according to the adjustment steps.

[0022] The present application relates to an electronic expansion valve regulation system and method for a variable frequency air-conditioning unit. The electronic expansion valve regulation system for the variable frequency air-conditioning unit completes a gas circulation process through an indoor unit cooperating with an outdoor unit. During the gas circulation process, a first sensor group detects the operating status of the outdoor unit in real time, and a second sensor group detects the operating status of the indoor unit in real time. The detection data of the first sensor group and the detection data of the second sensor group are sent to a controller. The controller adjusts the working status of the first electronic expansion valve or the second electronic expansion valve according to the detection data of the first sensor group and the detection data of the second sensor group, so as to improve the control accuracy of the controller for the entire unit and ensure that the entire system can operate efficiently. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic structural diagram of an electronic expansion valve regulation system for a variable frequency air-conditioning unit provided in one embodiment of the present application.

[0024] Figure 2 A schematic diagram of the connection between a first sensor group and an outdoor unit of an electronic expansion valve regulation system of a variable frequency air-conditioning unit provided in one embodiment of the present application.

[0025] Figure 3 A second sensor group and an indoor unit unit of an electronic expansion valve adjustment system of a variable frequency air-conditioning unit are provided in one embodiment of the present application.

[0026] Figure 4 A schematic diagram of communication between a first sensor group, a second sensor group and a controller of an electronic expansion valve regulation system of a variable frequency air-conditioning unit provided in one embodiment of the present application.

[0027] Figure 5 A schematic flow chart of a method for adjusting an electronic expansion valve of a variable frequency air-conditioning unit provided in one embodiment of the present application.

[0028] Reference numerals:

[0029] 100, outdoor unit; 101, compressor; 102, four-way valve; 102a, first channel;

[0030] 102b, second channel; 102c, third channel; 102d, fourth channel; 103, outdoor heat exchanger;

[0031] 104, filter; 105, gas-liquid separator; 200, indoor unit; 201, indoor heat exchanger;

[0032] 300, controller; 400, first electronic expansion valve; 500, second electronic expansion valve;

[0033] 600, first sensor group; 601, first sensor; 602, second sensor;

[0034] 603, third sensor; 604, fourth sensor; 700, second sensor group;

[0035] 701, fifth sensor; 800, first one-way valve; 801, second one-way valve;

[0036] 900, fan parts; 901, outdoor fan; 902, indoor fan. DETAILED DESCRIPTION

[0037] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments in the implementation manner are intended to be used to explain the present invention and should not be construed as limiting the present invention.

[0038] References in this specification to "one embodiment" or "an example" or "an example" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment itself may be included in at least one embodiment of the present patent disclosure. The appearance of the phrase "in one embodiment" in various places in the specification does not necessarily refer to the same embodiment.

[0039] The present application provides an electronic expansion valve adjustment system and method for a variable frequency air conditioning unit.

[0040] like Figure 1 , Figure 2 and Figure 3 As shown, in one embodiment of the present application, the electronic expansion valve regulation system of the variable frequency air-conditioning unit includes an outdoor unit 100, an indoor unit 200, a controller 300, a first electronic expansion valve 400, a second electronic expansion valve 500, a first sensor group 600 and a second sensor group 700.

[0041] The first electronic expansion valve 400 is in communication with the outdoor unit 100, and the first electronic expansion valve 400 is electrically connected to the controller 300. The second electronic expansion valve 500 is in communication with the indoor unit 200, and the second electronic expansion valve 500 is electrically connected to the controller 300. The first sensor group 600 is provided at the outdoor unit 100, and the operating state of the outdoor unit 100 is detected by the first sensor group 600. The second sensor group 700 is provided at the indoor unit 200, and the operating state of the indoor unit 200 is detected by the second sensor group 700.

[0042] In this embodiment, the gas circulation process is completed by the indoor unit 200 cooperating with the outdoor unit 100. During the gas circulation process, the first sensor group 600 detects the operating status of the outdoor unit 100 in real time, and the second sensor group 700 detects the operating status of the indoor unit 200 in real time. The detection data of the first sensor group 600 and the detection data of the second sensor group 700 are sent to the controller 300. The controller 300 adjusts the working status of the first electronic expansion valve 400 or the second electronic expansion valve 500 according to the detection data of the first sensor group 600 and the detection data of the second sensor group 700 to improve the control accuracy of the controller 300 for the entire unit and ensure that the entire system can operate efficiently.

[0043] like Figure 2As shown, in one embodiment of the present application, the outdoor unit 100 includes a compressor 101, a four-way valve 102, an outdoor heat exchanger 103, a filter 104 and a gas-liquid separator 105, the outlet of the compressor 101 is connected to the first channel 102a of the four-way valve 102, the second channel 102b of the four-way valve 102 is connected to the first connecting port of the outdoor heat exchanger 103, the second connecting port of the outdoor heat exchanger 103 is connected to the inlet of the filter 104, the inlet of the gas-liquid separator 105 is connected to the third channel 102c of the four-way valve 102, and the outlet of the gas-liquid separator 105 is connected to the inlet of the compressor 101.

[0044] Specifically, the four-way valve 102 includes a first channel 102a, a second channel 102b, a third channel 102c and a fourth channel 102d.

[0045] In this embodiment, during the refrigeration process, the compressor 101 allows the gas to flow between the outdoor unit 100 and the indoor unit 200. After the high-temperature and high-pressure gas starts from the outlet of the compressor 101, it enters the four-way valve 102 through the first channel 102a of the four-way valve 102, and enters the outdoor heat exchanger 103 through the second channel 102b of the four-way valve 102. The high-temperature and high-pressure gas undergoes a process of absorbing cold and releasing heat in the outdoor heat exchanger 103, thereby being transformed from the high-temperature and high-pressure gas into a medium-temperature and high-pressure liquid, and is discharged from the outdoor heat exchanger 103. After passing through the filter 104, it reaches the second electronic expansion valve 500, where it is transformed from a medium-temperature, high-pressure liquid into a low-temperature, low-pressure liquid. The low-temperature, low-pressure liquid then flows from the second electronic expansion valve 500 to the indoor heat exchanger 201, where it is transformed into a low-temperature, low-pressure gas. Finally, the low-temperature, low-pressure gas enters the four-way valve 102 through the fourth channel 102d of the four-way valve 102, and enters the gas-liquid separator 105 through the third channel 102c of the four-way valve 102, and finally re-enters the compressor 101 through the outlet of the gas-liquid separator 105.

[0046] That is, during the refrigeration process, the flow path of the entire gas is the outlet of the compressor 101-the first channel 102a of the four-way valve 102-the second channel 102b of the four-way valve 102-the outdoor heat exchanger 103-the filter 104-the second electronic expansion valve 500-the indoor heat exchanger 201-the fourth channel 102d of the four-way valve 102-the third channel 102c of the four-way valve 102-the gas-liquid separator 105-the inlet of the compressor 101.

[0047] During the heating process, the high-temperature and high-pressure gas also starts from the outlet of the compressor 101, enters the four-way valve 102 through the first channel 102a of the four-way valve 102, and then enters the indoor heat exchanger 201 through the fourth channel 102d of the four-way valve 102. In the indoor heat exchanger 201, the high-temperature and high-pressure gas undergoes a process of absorbing cold and releasing heat, thereby being transformed into a medium-temperature and high-pressure liquid, and then discharged from the indoor heat exchanger 201. The medium-temperature and high-pressure liquid is discharged from the indoor heat exchanger 201 and reaches the first electronic expansion valve 400. In the first electronic expansion valve The medium-temperature and high-pressure liquid in 400 is converted into a low-temperature and low-pressure liquid, and then the low-temperature and low-pressure liquid enters the outdoor heat exchanger 103 from the first electronic expansion valve 400, and completes the heat absorption and cooling process in the outdoor heat exchanger 103, thereby converting the low-temperature and low-pressure liquid into a low-temperature and low-pressure gas. The low-temperature and low-pressure gas enters the four-way valve 102 through the second connecting port of the four-way valve 102, and enters the gas-liquid separator 105 through the third channel 102c of the four-way valve 102, and finally enters the compressor 101 through the outlet of the gas-liquid separator 105.

[0048] That is, during the heating process, the flow path of the entire gas is the outlet of the compressor 101 - the first channel 102a of the four-way valve 102 - the fourth channel 102d of the four-way valve 102 - the indoor heat exchanger 201 - the first electronic expansion valve 400 - the outdoor heat exchanger 103 - the second channel 102b of the four-way valve 102 - the third channel 102c of the four-way valve 102 - the gas-liquid separator 105 - the inlet of the compressor 101.

[0049] like Figure 3 As shown, in one embodiment of the present application, the indoor unit 200 includes an indoor heat exchanger 201, the third connection port of the indoor heat exchanger 201 is connected to the outlet of the filter 104, and the fourth connection port of the indoor heat exchanger 201 is connected to the fourth channel 102d of the four-way valve 102.

[0050] In this embodiment, the indoor heat exchanger 201 mainly completes the process of absorbing heat and releasing cold, thereby reducing the temperature of the gas entering the indoor heat exchanger 201 .

[0051] like Figure 3 As shown, in one embodiment of the present application, the first sensor group 600 includes a first sensor 601, a second sensor 602, a third sensor 603 and a fourth sensor 604, the first sensor 601 is arranged at the outlet of the compressor 101, the second sensor 602 is arranged at the inlet of the first channel 102a of the four-way valve 102, the third sensor 603 is arranged at the outlet of the gas-liquid separator 105, and the fourth sensor 604 is arranged at the inlet of the compressor 101.

[0052] Specifically, the first sensor 601 is a temperature sensor, the second sensor 602 is a pressure sensor, the third sensor 603 is a pressure sensor, and the fourth sensor 604 is a temperature sensor.

[0053] In this embodiment, the gas temperature Tp at the outlet of the compressor 101 is detected by the first sensor 601 .

[0054] The gas pressure P1 entering the first passage 102 a of the four-way valve 102 is detected by the second sensor 602 .

[0055] The gas pressure P3 at the outlet of the gas-liquid separator 105 is detected by the third sensor 603 .

[0056] The temperature Tx of the gas entering the inlet of the compressor 101 is detected by the fourth sensor 604 .

[0057] like Figure 2 As shown, in one embodiment of the present application, the second sensor group 700 includes a fifth sensor 701 , and the fifth sensor 701 is disposed at the fourth connection port of the indoor heat exchanger 201 .

[0058] Specifically, the fifth sensor 701 is a temperature sensor.

[0059] In this embodiment, the outlet air temperature Tq of the indoor heat exchanger 201 is detected by the fifth sensor 701 .

[0060] like Figure 4 As shown, in one embodiment of the present application, the outlet of the first electronic expansion valve 400 is connected to the outlet of the filter 104, the inlet of the first electronic expansion valve 400 is connected to the inlet of the second electronic expansion valve 500, and the outlet of the second electronic expansion valve 500 is connected to the third connecting port of the indoor heat exchanger 201.

[0061] In this embodiment, during heating, the gas flows through the first electronic expansion valve 400 , and the gas coming out of the indoor heat exchanger 201 is input into the outdoor heat exchanger 103 through the first electronic expansion valve 400 .

[0062] During cooling, the gas flows through the second electronic expansion valve 500 , and the gas exhausted from the outdoor heat exchanger 103 is input into the indoor heat exchanger 201 through the second electronic expansion valve 500 .

[0063] like Figure 2As shown, in one embodiment of the present application, the outdoor unit 100 also includes a first one-way valve 800, which is arranged between the filter 104 and the second electronic expansion valve 500, the inlet of the first one-way valve 800 is connected to the outlet of the filter 104, and the outlet of the first one-way valve 800 is connected to the inlet of the second electronic expansion valve 500.

[0064] In this embodiment, the opening and closing of the refrigeration passage is controlled by the first one-way valve 800. When the first one-way valve 800 is opened and the second one-way valve 801 is closed, the entire variable frequency air conditioning system is in a cooling state.

[0065] like Figure 2 As shown, in one embodiment of the present application, the indoor unit unit 200 also includes a second one-way valve 801, which is arranged between the indoor heat exchanger 201 and the first electronic expansion valve 400, and the inlet of the second one-way valve 801 is connected to the third connecting port of the indoor heat exchanger 201, and the outlet of the second one-way valve 801 is connected to the inlet of the first electronic expansion valve 400.

[0066] In this embodiment, the opening and closing of the heating passage is controlled by the second one-way valve 801. When the second one-way valve 801 is opened and the first one-way valve 800 is closed, the entire variable frequency air conditioning system is in a heating state.

[0067] like Figure 1 As shown, in one embodiment of the present application, the electronic expansion valve regulation system of the variable frequency air-conditioning unit also includes a fan component 900, and the fan component 900 includes an outdoor fan 901 and an indoor fan 902. The outdoor fan 901 is used to exchange the outdoor heat exchanger 103 with the outside air, and the indoor fan 902 is used to exchange the indoor heat exchanger 201 with the outside air. The outdoor fan 901 is connected to the outdoor heat exchanger 103, and the indoor fan 902 is connected to the indoor fan 902.

[0068] In this embodiment, after the outdoor heat exchanger 103 has finished working, the outdoor heat exchanger 103 is connected to the outside air through the outdoor fan 901.

[0069] After the indoor heat exchanger 201 has finished working, the indoor heat exchanger 201 is connected with the outside air through the indoor fan 902 .

[0070] like Figure 5 As shown, in one embodiment of the present application, a method for adjusting an electronic expansion valve adjustment system of a variable frequency air conditioner is provided, and the method for adjusting an electronic expansion valve adjustment system of a variable frequency air conditioner includes:

[0071] S100, setting a preset value b for the compressor inlet temperature, a preset value c for the compressor outlet temperature, and a temperature difference threshold a.

[0072] Specifically, the units of the compressor inlet temperature preset value b, the compressor outlet temperature preset value c and the temperature difference threshold a are all in °C.

[0073] The compressor inlet temperature preset value b∈[1,10], and the default value of the compressor inlet temperature preset value b is 5.

[0074] The compressor outlet temperature preset value c∈[10,40], and the default value of the compressor outlet temperature preset value c is 15.

[0075] The temperature difference threshold a∈[3,15], and the default value of the temperature difference threshold a is 5.

[0076] S200, setting a first judgment condition, a second judgment condition and a third judgment condition.

[0077] Specifically, the first judgment condition is: Tx>Te+b.

[0078] That is, it is determined whether the gas temperature Tx at the inlet of the compressor 101 is greater than the sum of the saturation temperature Te at the inlet of the compressor and the preset value b of the inlet temperature of the compressor.

[0079] The second judgment condition is: Tp>Tc+c.

[0080] That is, it is determined whether the gas temperature Tp at the compressor outlet is greater than the sum of the saturation temperature Tc at the compressor outlet and the preset value c of the compressor outlet temperature.

[0081] The third judgment condition is: Tq-Te>a.

[0082] That is, it is determined whether the difference between the outlet temperature Tq of the indoor heat exchanger and the saturation temperature Te of the compressor inlet is greater than the temperature difference threshold a.

[0083] S300, acquiring detection data of the first sensor group and detection data of the second sensor group.

[0084] S400 , based on the detection data of the first sensor group and the detection data of the second sensor group, determining whether the detection data of the first sensor group and the detection data of the second sensor group meet a first determination condition.

[0085] S500: If the detection data of the first sensor group and the detection data of the second sensor group meet the first judgment condition, determine whether the detection data of the first sensor group and the detection data of the second sensor group meet the second judgment condition.

[0086] S600: If the detection data of the first sensor group and the detection data of the second sensor group meet the second judgment condition, determine whether the detection data of the first sensor group and the detection data of the second sensor group meet the third judgment condition.

[0087] S700: If the detection data of the first sensor group and the detection data of the second sensor group do not satisfy the third judgment condition, the adjustment steps of the second electronic expansion valve are calculated, and the opening degree of the second electronic expansion valve is adjusted according to the adjustment steps.

[0088] Specifically, the controller includes a storage module, and the storage module is provided with a PID algorithm, and the PID algorithm is specifically:

[0089] u(k)=KP*[e(k)-e(k-1)]+KI*e(k).

[0090] Among them, KP is the proportional constant, KP=2, KI is the integral constant, KI=1, e(k) is the error, and k is the number of steps of the error.

[0091] Since the opening of the electronic expansion valve is adjusted by adjusting the stepper motor, the opening of the electronic expansion valve can be adjusted by calculating the number of steps of the stepper motor through the PID algorithm.

[0092] In this embodiment, after the compressor is started, the gas pressure P3 at the outlet of the gas-liquid separator is detected by the third sensor at the inlet of the compressor. Since the gas discharged from the outlet of the gas-liquid separator will enter the compressor through the inlet of the compressor, and no other equipment is set between the inlet of the compressor and the outlet of the gas-liquid separator, the gas pressure at the outlet of the gas-liquid separator can be regarded as the gas pressure P3 at the inlet of the compressor. Then, the saturation temperature Te of the compressor inlet is obtained in combination with the gas pressure P3 at the inlet of the compressor, and the gas temperature Tx at the inlet of the compressor is detected by the fourth sensor.

[0093] At the outlet of the compressor, the first sensor is used to detect the gas temperature Tp at the compressor outlet, and the second sensor is used to detect the pressure P1 of the gas entering the first channel of the four-way valve. Since the gas discharged from the outlet of the compressor will directly enter the first channel of the four-way valve, the gas pressure in the first channel of the four-way valve can be regarded as the gas pressure P1 at the outlet of the compressor. Then, the saturation temperature Tc of the compressor outlet is obtained in combination with the gas pressure P1 at the outlet of the compressor.

[0094] The relationship between gas pressure and saturation temperature is shown in Table 1 Gas Pressure-Saturation Temperature Comparison Table.

[0095] Table-1

[0096] Saturation temperature Gas pressure -30.00 2.70 -29.00 2.82 -28.00 2.93 -27.00 3.05 -26.00 3.18 -25.00 3.30 ... ...

[0097] The detection data of the first sensor, the second sensor, the third sensor and the fourth sensor will be transmitted to the controller in real time. When the gas temperature Tx at the compressor inlet is higher than the sum of the saturation temperature Te at the compressor inlet and the preset value b of the compressor inlet temperature, and the gas temperature Tp at the compressor outlet is greater than the sum of the saturation temperature Tc at the compressor outlet and the preset value c of the compressor outlet temperature, the controller obtains the detection data of the fifth sensor and performs subsequent settings.

[0098] When the gas temperature Tx at the compressor inlet is lower than the sum of the saturation temperature Te at the compressor inlet and the preset value b of the compressor inlet temperature, and / or the gas temperature Tp at the compressor outlet is less than the sum of the saturation temperature Tc at the compressor outlet and the preset value c of the compressor outlet temperature, the controller reduces the opening of the second electronic expansion valve.

[0099] When the gas temperature Tx at the compressor inlet is higher than the sum of the saturation temperature Te at the compressor inlet and the preset value b of the compressor inlet temperature, and the gas temperature Tp at the compressor outlet is greater than the sum of the saturation temperature Tc at the compressor outlet and the preset value c of the compressor outlet temperature, the sensor obtains the outlet temperature Tq of the indoor heat exchanger. When the difference between the outlet temperature Tq of the indoor heat exchanger and the saturation temperature Te at the compressor inlet is greater than or equal to the temperature difference threshold c, the controller controls the second electronic expansion valve to open.

[0100] When the difference between the outlet temperature Tq of the indoor heat exchanger and the saturation temperature Te of the compressor inlet is less than the temperature difference threshold c, the controller controls the second electronic expansion valve to close.

[0101] The technical features of the above-described embodiments may be arbitrarily combined, and the execution order of the method steps is not limited. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0102] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. An electronic expansion valve regulating system for a variable frequency air conditioning unit, characterized in that: The variable frequency air conditioning unit electronic expansion valve regulating system comprises: Outdoor unit; Indoor unit; Controller; a first electronic expansion valve, the first electronic expansion valve being in communication with the outdoor unit, and the first electronic expansion valve being electrically connected to the controller; a second electronic expansion valve, the second electronic expansion valve being in communication with the indoor unit, and the second electronic expansion valve being electrically connected to the controller; a first sensor group, wherein the first sensor group is disposed in the outdoor unit and detects the operating state of the outdoor unit through the first sensor group; The second sensor group is arranged in the indoor unit, and the operating state of the indoor unit is detected by the second sensor group.

2. The variable frequency air conditioner electronic expansion valve regulating system according to claim 1, characterized in that: The outdoor unit includes a compressor, a four-way valve, an outdoor heat exchanger, a filter and a gas-liquid separator, the outlet of the compressor is connected to the first channel of the four-way valve, the second channel of the four-way valve is connected to the first connecting port of the outdoor heat exchanger, the second connecting port of the outdoor heat exchanger is connected to the inlet of the filter, the inlet of the gas-liquid separator is connected to the third channel of the four-way valve, and the outlet of the gas-liquid separator is connected to the inlet of the compressor.

3. The variable frequency air conditioning unit electronic expansion valve regulating system according to claim 2, characterized in that: The indoor unit includes an indoor heat exchanger, a third connection port of the indoor heat exchanger is communicated with an outlet of a filter, and a fourth connection port of the indoor heat exchanger is communicated with a fourth channel of a four-way valve.

4. The variable frequency air conditioner electronic expansion valve regulating system according to claim 3, characterized in that: The first sensor group includes a first sensor, a second sensor, a third sensor and a fourth sensor. The first sensor is arranged at the outlet of the compressor, the second sensor is arranged at the inlet of the first channel of the four-way valve, the third sensor is arranged at the outlet of the gas-liquid separator, and the fourth sensor is arranged at the inlet of the compressor.

5. The variable frequency air conditioner electronic expansion valve regulating system according to claim 4, characterized in that: The second sensor group includes a fifth sensor, and the fifth sensor is arranged at a fourth connecting port of the indoor heat exchanger.

6. The variable frequency air conditioner electronic expansion valve regulating system according to claim 5, characterized in that: The outlet of the first electronic expansion valve is communicated with the outlet of the filter, the inlet of the first electronic expansion valve is communicated with the inlet of the second electronic expansion valve, and the outlet of the second electronic expansion valve is communicated with the third connecting port of the indoor heat exchanger.

7. The variable frequency air conditioner electronic expansion valve regulating system according to claim 6, characterized in that: The outdoor unit further includes a first one-way valve, which is disposed between the filter and the second electronic expansion valve, wherein the inlet of the first one-way valve is connected to the outlet of the filter, and the outlet of the first one-way valve is connected to the inlet of the second electronic expansion valve.

8. The variable frequency air conditioner electronic expansion valve regulating system according to claim 7, characterized in that: The indoor unit also includes a second one-way valve, which is arranged between the indoor heat exchanger and the first electronic expansion valve, the inlet of the second one-way valve is connected to the third connecting port of the indoor heat exchanger, and the outlet of the second one-way valve is connected to the inlet of the first electronic expansion valve.

9. The variable frequency air conditioner electronic expansion valve regulating system according to claim 8, characterized in that: The variable frequency air conditioning unit electronic expansion valve regulating system also includes: The fan component includes an outdoor fan and an indoor fan. The outdoor fan is used to exchange air between an outdoor heat exchanger and the outside air. The indoor fan is used to exchange air between an indoor heat exchanger and the outside air. The outdoor fan is connected to the outdoor heat exchanger, and the indoor fan is connected to the indoor fan.

10. A method for adjusting an electronic expansion valve of a variable frequency air conditioning unit, characterized in that: The electronic expansion valve adjustment method of the variable frequency air conditioning unit comprises: Set the compressor inlet temperature preset value b, the compressor outlet temperature preset value c and the temperature difference threshold a; Setting a first judgment condition, a second judgment condition and a third judgment condition; Acquire detection data of the first sensor group and detection data of the second sensor group; Based on the detection data of the first sensor group and the detection data of the second sensor group, determining whether the detection data of the first sensor group and the detection data of the second sensor group meet a first determination condition; If the detection data of the first sensor group and the detection data of the second sensor group meet the first judgment condition, then judging whether the detection data of the first sensor group and the detection data of the second sensor group meet the second judgment condition; If the detection data of the first sensor group and the detection data of the second sensor group meet the second judgment condition, then judging whether the detection data of the first sensor group and the detection data of the second sensor group meet the third judgment condition; If the detection data of the first sensor group and the detection data of the second sensor group do not satisfy the third judgment condition, the adjustment steps of the second electronic expansion valve are calculated, and the opening degree of the second electronic expansion valve is adjusted according to the adjustment steps.

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