Air conditioning control device, method, system and equipment

Abstract

The present application relates to an air-conditioning control device, method, system and equipment. The air-conditioning control device includes: a ball valve device module, a current detection circuit module and a drive module. The ball valve device module is used to output a ball valve output signal to the current detection circuit module according to the liquid position of the air-conditioning liquid storage tank. The current detection circuit module is used to output a drive control signal to the drive module according to the ball valve output signal. The drive module is used to control the opening of the expansion valve of the air-conditioning according to the drive control signal. The expansion valve opening is used to control the liquid position of the liquid storage tank to be not lower than a preset first liquid level height and not higher than a preset second liquid level height, thereby avoiding the liquid level of the liquid storage tank being too low or too high, and effectively preventing the fluorine pump of the air-conditioning from inhaling gas to cause cavitation, thereby effectively improving the service life of the fluorine pump.

Description

Technical Field

[0001] The present application relates to the technical field, and in particular to an air conditioning control device, method, system and equipment. Background Art

[0002] With the rapid development of the communications industry, power consumption by communications switching equipment and computer room ventilation and cooling systems accounts for over 90% of total electricity consumption, making energy consumption an increasingly prominent issue. Major operators are actively exploring energy conservation and emission reduction initiatives. Because computer room air conditioning (CRA) power consumption, a component of ventilation and cooling equipment, accounts for over 40% of total equipment power consumption, reducing the operating hours of compressors in CRAs has become a key area of research for energy conservation and emission reduction in the communications industry. Traditional vapor-compression refrigeration cycles still require cooling during winter and transitional seasons, consuming significant amounts of electricity. Research on energy-saving technologies that can effectively utilize natural cooling resources, either directly or indirectly, during winter and transitional seasons to replace vapor-compression refrigeration cycles is of great significance.

[0003] To address these issues, industry experts and many air conditioning manufacturers have conducted theoretical and practical research on natural circulation systems using fluorine pumps under low ambient temperature conditions. These studies have demonstrated significant energy-saving benefits for natural circulation systems, enabling fluorine pump air conditioners to regulate the ambient temperature of data centers. These systems offer three circulation modes: compressor mode, pump mode, and a mixed mode in which both the compressor and pump operate together. However, existing fluorine pump air conditioners often experience low liquid levels in the storage tank during normal operation, leading to cavitation and reduced pump life. Summary of the Invention

[0004] The present application provides an air-conditioning control device, method, system and equipment to prevent the liquid level of the air-conditioning storage tank from being too low or too high, and can effectively prevent the fluorine pump of the air-conditioning from sucking in gas and causing cavitation. The control logic is simple, and the service life of the fluorine pump is effectively improved while reducing the control cost.

[0005] In a first aspect, an embodiment of the present application provides an air conditioning control device, comprising: a ball valve device module, a current detection circuit module, and a drive module;

[0006] The ball valve device module is used to output a ball valve output signal to the current detection circuit module according to the liquid position of the air conditioner's liquid storage tank;

[0007] The current detection circuit module is used to output a driving control signal to the driving module according to the output signal of the ball valve;

[0008] The driving module is used to control the opening of the expansion valve of the air conditioner according to the driving control signal, and the opening of the expansion valve is used to control the liquid level of the liquid storage tank to be not lower than a preset first liquid level height and not higher than a preset second liquid level height.

[0009] Optionally, the ball valve device module includes a ball valve device, and the ball valve device is arranged in a liquid storage tank of the air conditioner;

[0010] The ball valve device is used to detect the liquid position of the liquid storage tank and generate a current signal based on the liquid position of the liquid storage tank as the ball valve output signal.

[0011] Optionally, the current detection circuit module includes: a reference voltage circuit and a differential amplifier circuit;

[0012] The reference voltage circuit is used to output a reference voltage signal to the differential amplifier circuit;

[0013] The differential amplifier circuit is used to perform differential amplification based on the reference voltage signal and the ball valve output signal to obtain the drive control signal and output the drive control signal.

[0014] Optionally, the reference voltage circuit includes: a first voltage-dividing resistor, a second voltage-dividing resistor and a voltage follower;

[0015] The first end of the first voltage-dividing resistor is electrically connected to the power supply end, and the second end of the first voltage-dividing resistor is electrically connected to the first end of the second voltage-dividing resistor and the first input end of the voltage follower;

[0016] The second end of the second voltage-dividing resistor is connected to the reference ground;

[0017] The second input terminal of the voltage follower and the output terminal of the voltage follower are both electrically connected to the non-inverting input terminal of the differential amplifier circuit;

[0018] The output end of the voltage follower is used to output the reference voltage signal to the non-inverting input end of the differential amplifier circuit.

[0019] Optionally, the differential amplifier circuit includes: a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor and a differential amplifier;

[0020] The first end of the first resistor is electrically connected to the output end of the ball valve device module, the second end of the first resistor is electrically connected to the first end of the second resistor and the first input end of the differential amplifier, and the first end of the first resistor is used to receive the ball valve output signal output by the output end of the ball valve device module;

[0021] The second end of the second resistor is electrically connected to the second input end of the voltage follower and the output end of the voltage follower, and the second end of the second resistor is used to receive the reference voltage signal output by the output end of the voltage follower;

[0022] The first end of the third resistor is electrically connected to the first end of the fourth resistor and the second input end of the differential amplifier, and the second end of the third resistor is electrically connected to the reference ground;

[0023] The first end of the fifth resistor is electrically connected to the second end of the fourth resistor and the output end of the differential amplifier, the second end of the fifth resistor is electrically connected to the input end of the driving module, and the second end of the fifth resistor is used to output the driving control signal to the input end of the driving module.

[0024] In a second aspect, an embodiment of the present application provides an air conditioning control method, comprising:

[0025] Generate ball valve output signal based on the liquid level of the air conditioner's storage tank;

[0026] Performing current amplification processing on the ball valve output signal to obtain a drive control signal;

[0027] The expansion valve opening of the air conditioner is controlled according to the driving control signal, and the expansion valve opening is used to control the liquid level of the liquid storage tank to be no lower than a preset first liquid level height and no higher than a preset second liquid level height.

[0028] Optionally, generating a ball valve output signal according to the liquid position of the air conditioner's liquid storage tank includes:

[0029] Perform liquid level detection on the air conditioner's liquid storage tank to obtain the liquid position;

[0030] A current signal is generated based on the liquid position, and the current signal is determined as the ball valve output signal.

[0031] Optionally, performing current amplification processing on the ball valve output signal to obtain a drive control signal includes:

[0032] obtaining a reference voltage signal;

[0033] The drive control signal is obtained by performing differential amplification based on the reference voltage signal and the ball valve output signal.

[0034] In a third aspect, an embodiment of the present application provides an air-conditioning control system, comprising: an air-conditioning control device as described in any embodiment of the first aspect.

[0035] In a fourth aspect, an embodiment of the present application provides an air conditioning device, comprising: an air conditioning control system as described in the third invention;

[0036] In summary, the air-conditioning control device, method, system and equipment provided in the embodiments of the present application output a ball valve output signal to the current detection circuit module according to the liquid position of the air-conditioning liquid storage tank through the ball valve device module, so that the current detection circuit module can output a drive control signal to the drive module according to the ball valve output signal. The drive module controls the opening of the air-conditioning expansion valve according to the drive control signal, so as to control the liquid position of the liquid storage tank to be not lower than the preset first liquid level height and not higher than the preset second liquid level height by controlling the opening of the expansion valve, thereby avoiding the liquid level of the liquid storage tank from being too low or too high, and effectively preventing the fluorine pump of the air-conditioning from inhaling gas and causing cavitation. The height of the ball valve device module in the liquid storage tank is deduced through the current detection circuit module, and the opening of the expansion valve is adjusted through the drive module after amplifying the output current of the ball valve device module. The control logic is simple, and the service life of the fluorine pump is effectively improved while reducing the control cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0038] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0039] Figure 1 A structural block diagram of an air conditioning control device provided in an embodiment of the present application;

[0040] Figure 2 A schematic diagram of the circuit structure of an air-conditioning control device provided in an embodiment of the present application;

[0041] Figure 3 A schematic flow chart of the steps of an air conditioning control method provided in an embodiment of the present application;

[0042] Figure 4 A flowchart of an air conditioning control method provided in an optional embodiment of the present application;

[0043] Figure 5 A schematic diagram of the structure of an air conditioning control system provided in an embodiment of the present application;

[0044] Figure 6 This is a structural block diagram of an air-conditioning device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0045] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0046] In actual use, existing anti-cavitation devices usually need to detect the liquid level height of the liquid storage tank through sensors, and then return the liquid level height to the microprocessor. The microprocessor then performs logical judgment based on the liquid level height and adjusts the liquid level height of the liquid storage tank based on the logical judgment result. The control logic is complex and the control cost is high.

[0047] In view of this, one of the core concepts of the embodiments of the present application is to provide an air-conditioning control device, method, system and equipment, which uses a ball valve device module to detect the liquid position of the liquid tank of the air conditioner, and outputs a ball valve output signal to the current detection circuit module according to the liquid position of the liquid tank, so that the current detection circuit module can output a drive control signal to the drive module according to the ball valve output signal, and then the drive module can control the opening of the air-conditioning expansion valve according to the drive control signal, so as to achieve the purpose of controlling the liquid level height of the liquid tank, effectively avoiding the liquid level of the liquid tank being too low or too high, and can effectively prevent the fluorine pump of the air conditioner from inhaling gas and causing cavitation. Compared with the existing scheme, the air-conditioning control device provided by the present application only needs to adjust the opening of the expansion valve according to the liquid position of the liquid tank, and the control logic is simple. Compared with the expensive sensors used in the existing scheme, the air-conditioning control device provided by the present application is low in cost, which effectively improves the service life of the fluorine pump while reducing the control cost.

[0048] To facilitate understanding of the embodiments of the present application, further explanation will be given below in conjunction with the drawings and specific embodiments. The embodiments do not constitute a limitation on the embodiments of the present application.

[0049] Reference Figure 1 , shows a schematic diagram of the structure of an air conditioning control device provided by an embodiment of the present application. For example, Figure 1As shown, the air conditioning control device provided in the embodiment of the present application includes: a ball valve device module 110 , a current detection circuit module 120 and a driving module 130 . The detection input terminal of the current detection circuit module 120 is electrically connected to the output terminal of the ball valve device module 110, and the output terminal of the current detection circuit module 120 is electrically connected to the driver module 120. The ball valve device module 110 can be used to detect the liquid level of the air conditioner's liquid storage tank and output a ball valve output signal to the current detection circuit module 120 through the output terminal of the ball valve device module 110 based on the liquid level of the air conditioner's liquid storage tank. The current detection circuit module 120 can detect the ball valve output signal of the ball valve device module 110 through the detection input terminal and output a drive control signal to the driver module 130 through the output terminal based on the ball valve output signal. The driver module 130 can receive the drive control signal output by the current detection circuit module 120 and control the opening of the expansion valve of the air conditioner according to the drive control signal. The liquid level of the liquid storage tank is controlled by controlling the opening of the expansion valve. When the liquid level of the liquid storage tank reaches a preset first liquid level height or a preset second liquid level height, the expansion valve opening is stopped from being controlled, thereby controlling the liquid level of the liquid storage tank to be no lower than the preset first liquid level height or no higher than the preset second liquid level height. Among them, the preset first liquid level height and the preset second liquid level height can be set according to actual needs, and the embodiments of the present application do not limit this; the ball valve output signal can be a current signal, such as a current detection signal, and the embodiments of the present application do not limit this.

[0050] As can be seen, the embodiment of the present application detects the liquid position of the air conditioner's liquid storage tank through the ball valve device module 110, and outputs a ball valve output signal to the current detection circuit module 120 based on the liquid position of the liquid storage tank, so that the current detection circuit module 120 can output a drive control signal to the driver module 130 based on the ball valve output signal, so that the driver module 130 can control the opening of the air conditioner's expansion valve according to the drive control signal. By controlling the expansion valve opening, the purpose of controlling the liquid level in the liquid storage tank to be neither lower than a preset first liquid level nor higher than a preset second liquid level can be achieved, thereby preventing the liquid level in the liquid storage tank from being too low or too high. By controlling the opening of the electronic expansion valve, the refrigerant flow rate is adjusted, thereby effectively preventing the air conditioner's fluorine pump from inhaling gas and causing cavitation. Compared with existing solutions, the air conditioner control device provided by the embodiment of the present application detects the position of the ball valve device module 110 in the liquid storage tank through the current detection circuit module 120 to linearly adjust the opening of the expansion valve, and the control logic is simple. Furthermore, compared with existing solutions, the air conditioner control device provided by the embodiment of the present application is low-cost and does not require the use of expensive sensors, effectively improving the service life of the fluorine pump while reducing control costs.

[0051] In actual processing, the expansion valve in the embodiment of the present application can be an electronic expansion valve. The opening of the electronic expansion valve is adjusted by the driver module 130 to adjust the refrigerant flow rate and prevent the fluorine pump of the air conditioner from inhaling gas. The control logic is simple. Specifically, when the opening of the electronic expansion valve is adjusted by the driver module 130, the current detection circuit module 120 can obtain the ball valve output signal of the ball valve device module 110 in real time, and determine the liquid level height of the liquid storage tank in real time based on the ball valve output signal. Then, when the liquid level in the liquid storage tank decreases, the opening of the electronic expansion valve can be reduced to reduce the refrigerant flow rate; when the liquid level in the liquid storage tank increases, the opening of the electronic expansion valve can be increased to increase the refrigerant flow rate.

[0052] Furthermore, the embodiment of the present application may not detect the opening of the electronic expansion valve. To avoid damage to the electronic expansion valve and other components, the embodiment of the present application may preset a first liquid level and a second liquid level. When the opening of the electronic expansion valve is controlled by the driver module 1340, when the liquid position in the liquid storage tank reaches the preset first liquid level, the opening of the electronic expansion valve will no longer be reduced, so that the liquid position in the liquid storage tank is not lower than the preset first liquid level; when the liquid position in the liquid storage tank reaches the preset second liquid level, the opening of the electronic expansion valve will no longer be increased, so that the liquid position in the liquid storage tank is not higher than the preset second liquid level, thereby avoiding the driver module 130 from continuously outputting a drive control signal to the expansion valve, thereby effectively controlling the opening of the electronic expansion valve to adjust the refrigerant flow, and further effectively preventing the fluorine pump from inhaling gas.

[0053] In a specific implementation, the ball valve device module 110 in the embodiment of the present application may include a ball valve device, wherein the ball valve device is disposed in a liquid storage tank of the air conditioner, the input end of the ball valve device is connected to the liquid storage tank, and the output end of the ball valve device is electrically connected to the detection input end of the current detection circuit module.

[0054] Specifically, the embodiment of the present application sets a ball valve device in the liquid storage tank of the air conditioner and connects the input end of the ball valve device to the liquid storage tank, so that the ball valve device can detect the liquid position in the liquid storage tank and generate a current signal based on the liquid position in the liquid storage tank as a ball valve output signal. By electrically connecting the output end of the ball valve device to the detection input end of the current detection circuit module, the ball valve device can output the generated ball valve output signal to the current detection circuit module.

[0055] In actual processing, the embodiment of the present application can set the position of the ball valve device according to the liquid storage tank structure, so that the ball valve device can be triggered when the liquid level of the liquid storage tank reaches a certain height, and the liquid position of the liquid storage tank can be detected by the ball valve device. Then, according to the liquid position of the liquid storage tank, the ball valve output signal can be output to the current detection circuit module 120, and then the current detection circuit module 120 outputs a drive control signal to the drive module 130 based on the ball valve output signal. After receiving the drive control signal, the drive module 130 can linearly adjust the opening of the electronic expansion valve, such as linearly reducing the height of the electronic expansion valve to reduce the refrigerant flow, thereby effectively preventing the fluorine pump of the air conditioner from inhaling gas and causing cavitation; when the liquid level of the liquid storage tank is lower than a certain height, the ball valve device is triggered to output the ball valve output signal to the current detection circuit module 120, and then the current detection circuit module 120 outputs a drive control signal to the drive module 130 based on the ball valve output signal. After receiving the drive control signal, the drive module 130 can linearly increase the height of the electronic expansion valve to increase the refrigerant flow, thereby effectively preventing the fluorine pump of the air conditioner from inhaling gas and causing cavitation.

[0056] Optionally, the current detection circuit module 120 in the embodiment of the present application may include: a reference voltage circuit and a differential amplifier circuit. The reference voltage circuit is configured to cause the differential amplifier circuit to output a reference voltage signal, and the differential amplifier circuit is configured to perform differential amplification based on the reference voltage signal and the ball valve output signal to obtain and output a drive control signal.

[0057] Specifically, the first input end of the differential amplifier circuit can be electrically connected to the output end of the ball valve device module 110, and the differential amplifier circuit can receive the ball valve output signal output by the ball valve device module 110 through the first input end. The second input end of the differential amplifier circuit can be electrically connected to the reference voltage circuit. The reference voltage circuit can be used to generate a reference voltage signal and output the reference voltage signal to the differential amplifier circuit. The output end of the differential amplifier circuit can be electrically connected to the driving module 130. After receiving the reference voltage signal and the ball valve output signal, the differential amplifier circuit can perform differential amplification based on the reference voltage signal and the ball valve output signal to obtain a driving control signal, and can output the driving control signal to the driving module 130, so that the driving module 130 can adjust the opening of the expansion valve through the driving control signal. For example, the opening of the expansion valve can be linearly adjusted to control the liquid position in the liquid storage tank to be not lower than a preset first liquid level height and not higher than a preset second liquid level height by controlling the opening of the expansion valve, thereby avoiding the liquid level in the liquid storage tank being too low or too high, thereby effectively preventing the fluorine pump of the air conditioner from inhaling gas and causing cavitation, and effectively improving the service life of the fluorine pump.

[0058] Based on the above embodiment, optionally, the reference voltage circuit in the embodiment of the present application may include: a first voltage-dividing resistor, a second voltage-dividing resistor, and a voltage follower. The first end of the first voltage-dividing resistor is electrically connected to the power supply terminal, the second end of the first voltage-dividing resistor is electrically connected to the first end of the second voltage-dividing resistor and the first input terminal of the voltage follower, the second end of the second voltage-dividing resistor is connected to the reference ground, the second output terminal of the voltage follower and the output terminal of the voltage follower are both electrically connected to the non-inverting input terminal of the differential amplifier circuit, and the output terminal of the voltage follower is used to output a reference voltage signal to the non-inverting input terminal of the differential amplifier circuit.

[0059] Specifically, the first end of the first voltage-dividing resistor can be electrically connected to the power supply end to receive the voltage signal input from the power supply end, and the second end of the first voltage-dividing resistor can be electrically connected to the first end of the second voltage-dividing resistor and the first input end of the voltage follower to divide the voltage signal input from the power supply end through the first voltage-dividing resistor and the second voltage-dividing resistor, and the divided voltage signal can be amplified through the voltage follower to generate a reference voltage signal. The second output end of the voltage follower and the output end of the voltage follower can both be connected to the in-phase input of the differential amplifier circuit, so that the voltage follower can output the reference voltage signal to the in-phase input end of the differential amplifier circuit through the output end, and then the differential amplifier circuit can receive the reference voltage signal through the in-phase input end.

[0060] In a specific implementation, the differential amplifier circuit in the embodiment of the present application may include: a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, and a differential amplifier. The first end of the first resistor is electrically connected to the output end of the ball valve assembly module 110, the second end of the first resistor is electrically connected to the first end of the second resistor and the first input end of the differential amplifier, and the first end of the first resistor is configured to receive the ball valve output signal output from the output end of the ball valve assembly module 110; the second end of the second resistor is electrically connected to the second input end and the output end of the voltage follower, and the second end of the second resistor is configured to receive the reference voltage signal output from the output end of the voltage follower; the first end of the third resistor is electrically connected to the first end of the fourth resistor and the second input end of the differential amplifier, the second end of the third resistor is electrically connected to a reference ground, the first end of the fifth resistor is electrically connected to the second end of the fourth resistor and the output end of the differential amplifier, the second end of the fifth resistor is electrically connected to the input end of the driver module, and the second end of the fifth resistor is configured to output a drive control signal to the input end of the driver module 130.

[0061] Specifically, the first end of the first resistor can be electrically connected to the output end of the ball valve device module 110, and the first resistor can receive the ball valve output signal output from the output end of the ball valve device module 110 through the first end. The second end of the second resistor can be electrically connected to the second input end of the voltage follower and the output end of the voltage follower, so that the second resistor can receive the reference voltage signal output from the output end of the voltage follower through the second end. After passing through the second resistor, the third resistor, the fourth resistor, the fifth resistor and the differential amplifier, the reference voltage signal and the ball valve output signal are differentially amplified to obtain a drive control signal. The second end of the fifth resistor can be electrically connected to the input end of the driving module 130, so that the fifth resistor can output the drive control signal to the input end of the driving module 130 through the second end, so that the driving module 130 can control the opening of the expansion valve of the air conditioner according to the drive control signal, and then control the liquid position of the liquid storage tank to be not lower than the preset first liquid level height and not higher than the preset second liquid level height, thereby avoiding the liquid level of the liquid storage tank being too low or too high, and effectively preventing the fluorine pump of the air conditioner from inhaling gas to cause cavitation, thereby effectively improving the service life of the fluorine pump.

[0062] For example, refer to Figure 2The air conditioning control device in the embodiment of the present application can be used as an anti-cavitation control device, and the anti-cavitation control device can be composed of a ball valve device, a circuit detection circuit and a drive module, wherein the current detection circuit may include a reference voltage circuit and a differential amplifier circuit, and the differential amplifier circuit may include a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5 and a differential amplifier U1, and the reference voltage circuit may be composed of a voltage follower, such as the reference voltage circuit may include a first voltage divider resistor R6, a second voltage divider resistor R7 and a voltage follower U2. After the voltage output from the power supply end is divided by R6 and R7 at the non-inverting input end, a reference voltage signal is generated through U2, and the reference voltage corresponding to the reference voltage signal is input to R2 through the operational amplifier output end (i.e., the output end) of U2, and input to the non-inverting input end (i.e., the first input end) of U1 through R2. The output current signal of the ball valve device is input to the non-inverting input end (i.e., the first input end) of the operational amplifier of the differential amplifier U1 through R1, and the inverting input end (i.e., the second input end) of U1 is grounded through R3. The reverse input end of U1 is connected to the operational amplifier output end (i.e., the output end) through resistor R4, and the operational amplifier output end of U1 is connected to the control end of the drive module through R5. U1 outputs the generated drive control signal to the drive module through R5, so that the drive module controls the expansion valve opening of the air conditioner according to the drive control signal. When the liquid level in the liquid storage tank decreases, the opening of the electronic expansion valve is reduced, and when the liquid level in the liquid storage tank reaches a preset first liquid level, the opening of the electronic expansion valve is no longer reduced, so that the liquid level in the liquid storage tank is not lower than the preset first liquid level; when the liquid level in the liquid storage tank increases, the opening of the electronic expansion valve is increased, and when the liquid level in the liquid storage tank reaches a preset second liquid level, the opening of the electronic expansion valve is no longer increased, so that the liquid level in the liquid storage tank is not higher than the preset second liquid level, thereby controlling the liquid level in the liquid storage tank to be not lower than the preset first liquid level and not higher than the preset second liquid level, thereby preventing the liquid level in the liquid storage tank from being too low or too high, and effectively preventing the fluorine pump of the air conditioner from inhaling gas and causing cavitation, thereby effectively improving the service life of the fluorine pump. Wherein, the voltage output by the power supply end can be 3.3 volts (Volt, V), which is not limited in this example.

[0063] In summary, in the embodiment of the present application, the air-conditioning control device sets a ball valve device in the liquid storage tank of the air-conditioning to detect the liquid position of the liquid storage tank by using the ball valve device, and generates a current signal based on the liquid position of the liquid storage tank as the ball valve output signal, and outputs the ball valve output signal to the current detection circuit module 120, so that the differential amplifier circuit in the current detection circuit module 120 can perform differential amplification based on the reference voltage signal output by the reference amplifier circuit and the ball valve output signal to obtain a drive control signal, and output the drive control signal to the drive module 130, so that the drive module 130 can control the opening of the expansion valve of the air-conditioning according to the drive control signal, and then control the expansion valve opening interval. The liquid position of the liquid storage tank is controlled so that the liquid position of the liquid storage tank is not lower than the preset first liquid level height and not higher than the preset second liquid level height, thereby achieving the purpose of controlling the liquid level of the liquid storage tank and effectively avoiding the liquid level of the liquid storage tank being too low or too high. By controlling the opening of the electronic expansion valve to adjust the refrigerant flow, it can effectively prevent the air conditioning fluorine pump from sucking in gas and causing cavitation. Compared with the existing scheme, the air conditioning control device provided by the present application only needs to adjust the opening of the expansion valve according to the liquid position of the liquid storage tank. The control logic is simple, and compared with the expensive sensors used in the existing scheme, the air conditioning control device provided by the present application is low in cost, which effectively improves the service life of the fluorine pump while reducing the control cost.

[0064] Reference Figure 3 , shows a flowchart of the steps of an air conditioning control method provided by an embodiment of the present application. The air conditioning control method provided by an embodiment of the present application can be applied in an air conditioning control device, and specifically may include the following steps:

[0065] Step 310 : Generate a ball valve output signal according to the liquid level in the air conditioner's liquid storage tank.

[0066] Specifically, the embodiment of the present application can detect the liquid position of the liquid storage tank of the air conditioner through the ball valve device module, thereby generating a ball valve output signal according to the liquid position of the liquid storage tank.

[0067] Step 320: Perform current amplification processing based on the ball valve output signal to obtain a drive control signal.

[0068] Specifically, in the embodiment of the present application, the current detection circuit module can receive the ball valve output signal output by the ball valve device module, and can perform current amplification processing based on the ball valve output signal to obtain a drive control signal.

[0069] Step 330: Control the opening of the expansion valve of the air conditioner according to the drive control signal, wherein the opening of the expansion valve is used to control the liquid level of the liquid storage tank to be not lower than a preset first liquid level height and not higher than a preset second liquid level height.

[0070] Specifically, in the embodiment of the present application, the driving module can receive the driving control signal output by the current detection circuit module, and can control the opening of the expansion valve of the air conditioner based on the driving control signal, so as to control the liquid position of the liquid storage tank by controlling the opening of the expansion valve, so that the liquid position of the liquid storage tank can be no lower than the preset first liquid level height and no higher than the preset second liquid level height, thereby avoiding the liquid level of the liquid storage tank being too low or too high, and effectively preventing the fluorine pump of the air conditioner from inhaling gas and causing cavitation.

[0071] It can be seen that the embodiment of the present application generates a ball valve output signal based on the liquid position of the air conditioner's liquid storage tank, performs current amplification processing based on the ball valve output signal, obtains a drive control signal, and controls the expansion valve opening of the air conditioner based on the drive control signal, so as to control the liquid position of the liquid storage tank by controlling the expansion valve opening, so that the liquid position of the liquid storage tank can be not lower than the preset first liquid level height and not higher than the preset second liquid level height, thereby avoiding the liquid level of the liquid storage tank being too low or too high. By controlling the opening of the electronic expansion valve, the refrigerant flow rate is adjusted, thereby effectively preventing the air conditioner fluorine pump from inhaling gas and causing cavitation. Compared with the existing solution, the air conditioner control device provided by the embodiment of the present application linearly adjusts the opening of the expansion valve by detecting the position of the ball valve device module in the liquid storage tank through the current detection circuit module, and the control logic is simple. Furthermore, compared with the existing solution, the air conditioner control device provided by the embodiment of the present application is low in cost and does not require the use of expensive sensors, thereby effectively improving the service life of the fluorine pump while reducing the control cost.

[0072] In an optional embodiment, the embodiment of the present application generates a ball valve output signal based on the liquid position of the air conditioner's liquid storage tank, which may specifically include: performing liquid level detection on the air conditioner's liquid storage tank to obtain the liquid position; generating a current signal based on the liquid position, and determining the current signal as the ball valve output signal.

[0073] In an optional embodiment, the embodiment of the present application performs current amplification processing based on the ball valve output signal to obtain a drive control signal, which may specifically include: obtaining a reference voltage signal; performing differential amplification based on the reference voltage signal and the ball valve output signal to obtain the drive control signal.

[0074] As an example, see Figure 4, the liquid level of the air conditioner's liquid storage tank (i.e., the liquid position in the liquid storage tank) can be detected by a ball valve device. The current detection circuit can detect the output current of the ball valve device, amplify the output current, and output the amplified current to the driver module, so that the driver module can linearly adjust the opening of the expansion valve based on the amplified current. The current detection circuit can then detect whether the liquid level of the liquid storage tank is higher than H0 or lower than L0 based on the output current of the ball valve device, and stop adjusting the opening of the expansion valve when the liquid level of the liquid storage tank is higher than H0 or lower than L0. Wherein, L0 can be a preset first liquid level height, and H0 can be a preset second liquid level height, which is not limited in this example.

[0075] Reference Figure 5 Furthermore, the embodiment of the present application also provides an air conditioning control system, including the air conditioning control device 510 provided in the embodiment of the present application. The air conditioning control device 510 may be an anti-cavitation control device, which is not limited in the embodiment of the present application.

[0076] Optionally, the air conditioning control system provided in the embodiment of the present application may further include: a liquid storage tank 520 and an expansion valve 530. The first output end of the liquid storage tank 520 is connected to the input end of the air conditioning control device 510, and the first input end of the expansion valve 530 is connected to the output end of the air conditioning control device 510.

[0077] Optionally, the air conditioning control system provided in the embodiment of the present application may further include: a condenser 540, a fluorine pump 550, an evaporator 560, a first one-way valve 570, a compressor 580, and a second one-way valve 590. The output end of the condenser 540 is connected to the input end of the liquid storage tank 520, the first input end of the condenser 540 is connected to the first output end of the compressor 580, the second input end of the condenser 540 is connected to the output end of the first one-way valve 570, the input end of the fluorine pump 550 is connected to the second output end of the liquid storage tank 520, the output end of the fluorine pump 550 and the output end of the second one-way valve 590 are both connected to the second input end of the expansion valve 530, the input end of the evaporator 560 is connected to the output end of the expansion valve 530, the first output end of the evaporator 560 is connected to the input end of the first one-way valve 570, the second output end of the evaporator 560 is connected to the input end of the compressor 580, and the input end of the second one-way valve 590 is connected to the third output end of the liquid storage tank 520.

[0078] In a specific implementation, the air conditioning control system provided in the embodiment of the present application can be applied to a fluorine pump compressor dual-circulation cabinet air conditioner, and the embodiment of the present application does not limit this. For example, the fluorine pump circulation pipeline can be: condenser 540 → liquid storage tank 520 → fluorine pump 550 → expansion valve 530 → evaporator 560 → first one-way valve 570 → condenser 540, and the embodiment of the present application does not limit this; the vapor compression refrigeration circulation pipeline can be: compressor 580 → condenser 540 → liquid storage tank 520 → second one-way valve 590 → expansion valve 530 → evaporator 560 → compressor 580, and the embodiment of the present application does not limit this. Therefore, the refrigerant flow rate can be adjusted by controlling the opening of the electronic expansion valve, thereby effectively preventing the air conditioning fluorine pump from inhaling gas and causing cavitation.

[0079] Furthermore, the embodiment of the present application also provides an air conditioning device, including the air conditioning control system provided by the embodiment of the present application. Figure 6 As shown, air conditioning device 600 includes an air conditioning control system 610; wherein air conditioning control system 610 can be the air conditioning control system described in the above embodiment. In a specific implementation, air conditioning device 600 can be an air conditioner, such as a fluorine pump compressor dual-circulation cabinet air conditioner, which is not limited in this embodiment of the application.

[0080] Optionally, the air-conditioning device provided in the embodiment of the present application may further include: a processor, and a memory for storing executable instructions of the processor; wherein the processor is configured to execute the air-conditioning control method as described in any one of the above method embodiments.

[0081] An embodiment of the present application further provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the air conditioning control method provided in any of the aforementioned method embodiments are implemented.

[0082] It should be noted that for the method, control system, air-conditioning equipment, and storage medium embodiments, since they are basically similar to the air-conditioning control device embodiments, the description is relatively simple. For relevant details, please refer to the partial description of the air-conditioning control device embodiments.

[0083] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0084] Professionals should also be further aware that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the above description has generally described the components and steps of each example according to their functions. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0085] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of this application. It should be understood that the above description is only the specific implementation methods of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application should be included in the scope of protection of this application.

Claims

1. An air conditioning control device, characterized in that: include: Ball valve device module, current detection circuit module and drive module; The ball valve device module is used to output a ball valve output signal to the current detection circuit module according to the liquid position of the air conditioner's liquid storage tank; The ball valve device module includes a ball valve device, and the ball valve device is arranged in the liquid storage tank of the air conditioner; The ball valve device is used to detect the liquid position of the liquid storage tank and generate a current signal based on the liquid position of the liquid storage tank as the ball valve output signal; The current detection circuit module is used to output a driving control signal to the driving module according to the output signal of the ball valve; The driving module is used to control the opening of the expansion valve of the air conditioner according to the driving control signal, and the opening of the expansion valve is used to control the liquid level of the liquid storage tank to be not lower than a preset first liquid level height and not higher than a preset second liquid level height.

2. The air conditioning control device according to claim 1, characterized in that: The current detection circuit module includes: a reference voltage circuit and a differential amplifier circuit; The reference voltage circuit is used to output a reference voltage signal to the differential amplifier circuit; The differential amplifier circuit is used to perform differential amplification based on the reference voltage signal and the ball valve output signal to obtain the drive control signal and output the drive control signal.

3. The air conditioning control device according to claim 2, characterized in that: The reference voltage circuit includes: a first voltage-dividing resistor, a second voltage-dividing resistor and a voltage follower; The first end of the first voltage-dividing resistor is electrically connected to the power supply end, and the second end of the first voltage-dividing resistor is electrically connected to the first end of the second voltage-dividing resistor and the first input end of the voltage follower; The second end of the second voltage-dividing resistor is connected to the reference ground; The second input terminal of the voltage follower and the output terminal of the voltage follower are both electrically connected to the non-inverting input terminal of the differential amplifier circuit; The output end of the voltage follower is used to output the reference voltage signal to the non-inverting input end of the differential amplifier circuit.

4. The air conditioning control device according to claim 3, characterized in that: The differential amplifier circuit includes: a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor and a differential amplifier; The first end of the first resistor is electrically connected to the output end of the ball valve device module, the second end of the first resistor is electrically connected to the first end of the second resistor and the first input end of the differential amplifier, and the first end of the first resistor is used to receive the ball valve output signal output by the output end of the ball valve device module; The second end of the second resistor is electrically connected to the second input end of the voltage follower and the output end of the voltage follower, and the second end of the second resistor is used to receive the reference voltage signal output by the output end of the voltage follower; The first end of the third resistor is electrically connected to the first end of the fourth resistor and the second input end of the differential amplifier, and the second end of the third resistor is electrically connected to the reference ground; The first end of the fifth resistor is electrically connected to the second end of the fourth resistor and the output end of the differential amplifier, the second end of the fifth resistor is electrically connected to the input end of the driving module, and the second end of the fifth resistor is used to output the driving control signal to the input end of the driving module.

5. An air conditioning control method, characterized in that: include: Generate ball valve output signal based on the liquid level of the air conditioner's storage tank; Performing current amplification processing on the ball valve output signal to obtain a drive control signal; The opening of the expansion valve of the air conditioner is controlled according to the driving control signal, and the opening of the expansion valve is used to control the liquid level of the liquid storage tank to be no lower than a preset first liquid level height and no higher than a preset second liquid level height.

6. The air conditioning control method according to claim 5, characterized in that: The method of generating a ball valve output signal according to the liquid position of the air conditioner's liquid storage tank includes: Perform liquid level detection on the air conditioner's liquid storage tank to obtain the liquid position; A current signal is generated based on the liquid position, and the current signal is determined as the ball valve output signal.

7. The air conditioning control method according to claim 5, characterized in that: The current amplification process is performed according to the ball valve output signal to obtain a drive control signal, including: obtaining a reference voltage signal; The drive control signal is obtained by performing differential amplification based on the reference voltage signal and the ball valve output signal.

8. An air conditioning control system, characterized in that: include: The air conditioning control device according to any one of claims 1 to 4.

9. An air conditioning device, characterized in that: include: The air conditioning control system as claimed in claim 8.

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