A control method and device of an air conditioning system, the air conditioning system and a storage medium

Abstract

This invention discloses a control method, device, air conditioning system, and storage medium for an air conditioning system. The indoor unit of the air conditioning system has a dual-temperature evaporator, which is connected to the first and second suction ports of the outdoor unit compressor, respectively. A third throttling component is provided at the inlet of one of the evaporators, and the indoor unit also has an electric heating component for heating the evaporator. A first throttling component is provided at the condenser outlet. The air conditioning system has an anti-condensation function. The method includes: in cooling mode or dehumidification mode, determining whether to activate the anti-condensation function based on the pipe temperature of the dual-temperature evaporator, the suction and discharge temperatures of the compressor, and the condenser pipe temperature; after activating the anti-condensation function, controlling the opening degree of the first and third throttling components and the on / off state of the electric heating component based on the above temperature data. This reduces the superheat of the low-temperature evaporator, solving the problem of secondary moisture extraction of humid air in the air duct due to high superheat, resulting in condensation and water blowing.

Description

Technical Field

[0001] This invention belongs to the field of air conditioning technology, specifically relating to a control method, device, air conditioning system and storage medium for an air conditioning system, and particularly to a control method, device, dual-temperature air conditioning system and storage medium for preventing condensation in a dual-temperature air conditioning system. Background Technology

[0002] The outdoor unit of a dual-temperature air conditioning system uses a three-cylinder compressor and multiple throttling devices, while the indoor unit uses a dual-temperature evaporator. A dual-temperature evaporator consists of two evaporators with different evaporation temperatures, creating a temperature difference between them. When humid air passes through these two evaporators, it forms two streams of humid air at different temperatures. If the dew point temperature of the more humid air is higher than that of the less humid air, the humid air will undergo secondary moisture release within the air duct, forming condensation that is then blown out by the fan blades, resulting in a water-blowing phenomenon.

[0003] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is prior art. Summary of the Invention

[0004] The purpose of this invention is to provide a control method, device, air conditioning system, and storage medium for an air conditioning system. This addresses the problem in related dual-temperature air conditioning systems where, due to the temperature difference between the two evaporators, the dew point temperature of the humid air (high humidity) is higher than that of the humid air (low humidity), causing secondary moisture release and condensation within the duct, which is then blown out by the fan blades. The invention achieves this by controlling the opening of the throttling component and the on / off state of the electric heating element using an anti-condensation function in either cooling or dehumidification mode. This reduces the superheat of the low-temperature evaporator, solving the problem of secondary moisture release and condensation within the duct caused by high superheat, thus improving user comfort.

[0005] This invention provides a control method for an air conditioning system, the air conditioning system comprising: an outdoor unit and an indoor unit; the outdoor unit comprising: a three-cylinder compressor, a condenser, a flash evaporator, a first throttling component, and a second throttling component; the three-cylinder compressor having a first intake port, a second intake port, a third intake port, and an exhaust port; the exhaust port being connected to the condenser, the first throttling component, the flash evaporator, and the second throttling component in sequence; the flash evaporator being connected to the third intake port; the indoor unit comprising: a first evaporator, a second evaporator, and an electric heating assembly; the electric heating assembly being disposed at the fan blades of the indoor unit; the electric heating assembly, when turned on, can heat the second evaporator; a third throttling component is disposed at the inlet of the second evaporator; the first evaporator being connected to the first intake port; the second evaporator being connected to the second intake port; the air conditioning system having an anti-condensation function, using... To prevent condensation from forming inside the indoor unit, the method includes: when the air conditioning system is operating in cooling mode or dehumidification mode, acquiring the pipe temperature of the first evaporator, the pipe temperature of the second evaporator, the suction temperature of the first air intake, the suction temperature of the second air intake, the pipe temperature of the condenser, and the exhaust temperature of the exhaust port; determining whether to activate the anti-condensation function based on the pipe temperatures of the first evaporator, the second evaporator, the first air intake, the second air intake, the condenser, and the exhaust temperature of the exhaust port; after activating the anti-condensation function, controlling the opening degree of the first throttling component, the opening degree of the third throttling component, and the on / off state of the electric heating component based on the pipe temperatures of the first evaporator, the second evaporator, the first air intake, and the second air intake.

[0006] In some embodiments, determining whether to activate the anti-condensation function based on the pipe temperature of the first evaporator, the pipe temperature of the second evaporator, the suction temperature of the first suction port, the suction temperature of the second suction port, the pipe temperature of the condenser, and the exhaust temperature of the exhaust port includes: determining whether the air conditioning system is in a stable state based on the pipe temperature of the condenser and the exhaust temperature of the exhaust port; after determining that the air conditioning system is in a stable state, determining the suction superheat of the first suction port based on the pipe temperature of the first evaporator and the suction temperature of the first suction port; and determining the suction superheat of the second suction port based on the pipe temperature of the second evaporator and the suction temperature of the second suction port; determining the relationship between the suction superheat of the first suction port and a set first suction superheat, and determining the relationship between the suction superheat of the second suction port and a set second suction superheat; if the suction superheat of the first suction port is greater than or equal to the set first suction superheat, or the suction superheat of the second suction port is greater than or equal to the set second suction superheat, then activating the anti-condensation function is determined.

[0007] In some embodiments, determining whether the air conditioning system is in a stable state based on the tube temperature of the condenser and the exhaust temperature of the exhaust port includes: determining the exhaust superheat of the compressor based on the tube temperature of the condenser and the exhaust temperature of the exhaust port; determining the relationship between the exhaust superheat of the compressor and a set first exhaust superheat; if the exhaust superheat of the compressor is greater than or equal to the set first exhaust superheat, then determining that the air conditioning system is in a stable state.

[0008] In some embodiments, the opening degree of the first throttling component, the opening degree of the third throttling component, and the on / off state of the electric heating assembly are controlled according to the tube temperature of the first evaporator, the tube temperature of the second evaporator, the suction temperature of the first suction port, and the suction temperature of the second suction port, respectively. This includes: determining the suction superheat of the first suction port based on the tube temperature of the first evaporator and the suction temperature of the first suction port; determining the suction superheat of the second suction port based on the tube temperature of the second evaporator and the suction temperature of the second suction port; determining the opening degree adjustment amount of the first throttling component based on the range of the suction superheat of the first suction port; determining the opening degree adjustment amount of the third throttling component based on the range of the suction superheat of the second suction port; controlling the opening degree of the first throttling component based on the opening degree adjustment amount of the first throttling component; and controlling the opening degree of the third throttling component based on the opening degree adjustment amount of the third throttling component.

[0009] In some embodiments, the opening degree of the first throttling component, the opening degree of the third throttling component, and the on / off state of the electric heating component are controlled according to the tube temperature of the first evaporator, the tube temperature of the second evaporator, the suction temperature of the first suction port, and the suction temperature of the second suction port, respectively. The method further includes: after controlling the opening degree of the first throttling component and the opening degree of the third throttling component for a first time, determining the relationship between the suction superheat of the first suction port and a set third suction superheat, and determining the relationship between the suction superheat of the second suction port and a set fourth suction superheat; if the suction superheat of the first suction port is less than the set third suction superheat, and the suction superheat of the second suction port is less than the set fourth suction superheat, then the electric heating component is turned on.

[0010] In some embodiments, the method further includes: after activating the anti-condensation function, determining the operating status of the compressor, the relationship between the suction superheat of the first suction port and the set fifth suction superheat, and the relationship between the suction superheat of the second suction port and the set fifth suction superheat; if the compressor is in a stopped operating state, or if either the suction superheat of the first suction port or the suction superheat of the second suction port is less than the set fifth suction superheat, then deactivating the anti-condensation function.

[0011] In conjunction with the above method, another aspect of the present invention provides a control device for an air conditioning system, the air conditioning system comprising: an outdoor unit and an indoor unit; the outdoor unit comprising: a three-cylinder compressor, a condenser, a flash evaporator, a first throttling component, and a second throttling component; the three-cylinder compressor having a first intake port, a second intake port, a third intake port, and an exhaust port; the exhaust port being connected to the condenser, the first throttling component, the flash evaporator, and the second throttling component in sequence; the flash evaporator being further connected to the third intake port; the indoor unit comprising: a first evaporator, a second evaporator, and an electric heating assembly; the electric heating assembly being disposed at the fan blades of the indoor unit; the electric heating assembly, when turned on, can heat the second evaporator; a third throttling component is disposed at the inlet of the second evaporator; the first evaporator being connected to the first intake port; the second evaporator being connected to the second intake port; the air conditioning system having an anti-condensation function to prevent condensation inside the indoor unit. The device includes: a data acquisition unit configured to acquire the pipe temperature of the first evaporator, the pipe temperature of the second evaporator, the suction temperature of the first air intake, the suction temperature of the second air intake, the pipe temperature of the condenser, and the exhaust temperature of the exhaust port when the air conditioning system is operating in cooling mode or dehumidification mode; a control unit configured to determine whether to activate the anti-condensation function based on the pipe temperature of the first evaporator, the pipe temperature of the second evaporator, the suction temperature of the first air intake, the suction temperature of the second air intake, the pipe temperature of the condenser, and the exhaust temperature of the exhaust port; the control unit is further configured to, after activating the anti-condensation function, control the opening degree of the first throttling component, the opening degree of the third throttling component, and the on / off state of the electric heating component based on the pipe temperature of the first evaporator, the pipe temperature of the second evaporator, the suction temperature of the first air intake, and the suction temperature of the second air intake, respectively.

[0012] In some embodiments, the control unit determines whether to activate the anti-condensation function based on the pipe temperature of the first evaporator, the pipe temperature of the second evaporator, the suction temperature of the first suction port, the suction temperature of the second suction port, the pipe temperature of the condenser, and the exhaust temperature of the exhaust port. This includes: determining whether the air conditioning system is in a stable state based on the pipe temperature of the condenser and the exhaust temperature of the exhaust port; and after determining that the air conditioning system is in a stable state, determining whether to activate the anti-condensation function based on the pipe temperature of the first evaporator and the suction temperature of the first suction port. The superheat of the first intake port is determined; and the superheat of the second intake port is determined based on the tube temperature of the second evaporator and the intake temperature of the second intake port; the relationship between the superheat of the first intake port and the set first intake superheat is determined, and the relationship between the superheat of the second intake port and the set second intake superheat is determined; if the superheat of the first intake port is greater than or equal to the set first intake superheat, or the superheat of the second intake port is greater than or equal to the set second intake superheat, then the anti-condensation function is activated.

[0013] In some embodiments, the control unit determines whether the air conditioning system is in a stable state based on the pipe temperature of the condenser and the exhaust temperature of the exhaust port, including: determining the exhaust superheat of the compressor based on the pipe temperature of the condenser and the exhaust temperature of the exhaust port; determining the relationship between the exhaust superheat of the compressor and a set first exhaust superheat; and determining that the air conditioning system is in a stable state if the exhaust superheat of the compressor is greater than or equal to the set first exhaust superheat.

[0014] In some embodiments, the control unit controls the opening degree of the first throttling component, the opening degree of the third throttling component, and the on / off state of the electric heating assembly based on the tube temperature of the first evaporator, the tube temperature of the second evaporator, the suction temperature of the first suction port, and the suction temperature of the second suction port, respectively. This includes: determining the suction superheat of the first suction port based on the tube temperature of the first evaporator and the suction temperature of the first suction port; determining the suction superheat of the second suction port based on the tube temperature of the second evaporator and the suction temperature of the second suction port; determining the opening degree adjustment amount of the first throttling component based on the range of the suction superheat of the first suction port; determining the opening degree adjustment amount of the third throttling component based on the range of the suction superheat of the second suction port; controlling the opening degree of the first throttling component based on the opening degree adjustment amount of the first throttling component; and controlling the opening degree of the third throttling component based on the opening degree adjustment amount of the third throttling component.

[0015] In some embodiments, the control unit, based on the tube temperature of the first evaporator, the tube temperature of the second evaporator, the suction temperature of the first suction port, and the suction temperature of the second suction port, controls the opening degree of the first throttling component, the opening degree of the third throttling component, and the on / off state of the electric heating component, respectively. The control unit further includes: after controlling the opening degrees of the first throttling component and the third throttling component for a first time, determining the relationship between the suction superheat of the first suction port and a set third suction superheat, and determining the relationship between the suction superheat of the second suction port and a set fourth suction superheat; if the suction superheat of the first suction port is less than the set third suction superheat, and the suction superheat of the second suction port is less than the set fourth suction superheat, then the electric heating component is turned on.

[0016] In some embodiments, the control unit further includes: after activating the anti-condensation function, determining the operating status of the compressor, the relationship between the suction superheat of the first suction port and a set fifth suction superheat, and the relationship between the suction superheat of the second suction port and the set fifth suction superheat; if the compressor is in a stopped operating state, or if either the suction superheat of the first suction port or the suction superheat of the second suction port is less than the set fifth suction superheat, then deactivating the anti-condensation function.

[0017] In conjunction with the above-described device, the present invention further provides an air conditioning system, comprising: the control device for the air conditioning system described above.

[0018] In conjunction with the above method, the present invention further provides a storage medium comprising a stored program, wherein, when the program is executed, the device on which the storage medium is located controls the execution of the control method of the air conditioning system described above.

[0019] The present invention, when the dual-temperature air conditioning system is operating in cooling or dehumidification mode, determines whether to activate the anti-condensation function based on the pipe temperatures of the first evaporator, the second evaporator, the suction temperature of the first and second suction ports, the pipe temperature of the condenser, and the exhaust temperature of the exhaust port. After activating the anti-condensation function, the opening degree of the first throttling component at the condenser outlet, the opening degree of the third throttling component at the second evaporator inlet, and the on / off state of the electric heating element on the indoor unit fan blades are controlled based on the pipe temperatures of the first and second evaporators, the suction temperature of the first and second suction ports, and the exhaust temperature of the second suction port. By controlling the opening degree of the throttling components and the on / off state of the electric heating element, the superheat of the low-temperature evaporator is reduced, solving the problem of secondary moisture extraction, condensation, and water blowing caused by excessive superheat in the air duct, thus improving user comfort.

[0020] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention.

[0021] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0022] Figure 1 This is a flowchart illustrating an embodiment of the control method for an air conditioning system according to the present invention;

[0023] Figure 2 This is a flowchart illustrating one embodiment of determining the activation of the anti-condensation function in the method of the present invention;

[0024] Figure 3 This is a flowchart illustrating an embodiment of the method of the present invention for determining that the air conditioning system is in a stable state;

[0025] Figure 4 This is a flowchart illustrating an embodiment of the method for controlling the opening degree of the throttling component in the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of an embodiment of the control device for the air conditioning system of the present invention;

[0027] Figure 6 This is a schematic diagram of a system structure of an embodiment of the air conditioning system of the present invention;

[0028] Figure 7 This is a schematic diagram of another embodiment of the air conditioning system structure of the present invention;

[0029] Figure 8 This is a flowchart illustrating an embodiment of the anti-condensation control method for an air conditioning system according to the present invention;

[0030] Figure 9 This is a schematic diagram of the structure of an embodiment of the indoor unit of the air conditioning system of the present invention.

[0031] Referring to the accompanying drawings, the reference numerals in the embodiments of the present invention are as follows:

[0032] 102 - Acquisition unit; 104 - Control unit. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0034] According to an embodiment of the present invention, a control method for an air conditioning system is provided. The air conditioning system includes an outdoor unit and an indoor unit. The outdoor unit includes a three-cylinder compressor, a condenser, a flash evaporator, a first throttling component, and a second throttling component. The three-cylinder compressor has a first intake port, a second intake port, a third intake port, and an exhaust port. The exhaust port is connected to the condenser, the first throttling component, the flash evaporator, and the second throttling component in sequence. The flash evaporator is also connected to the third intake port. The indoor unit includes a first evaporator, a second evaporator, and an electric heating component. The electric heating component is disposed at the fan blades of the indoor unit. When the electric heating component is turned on, it can heat the second evaporator. A third throttling component is disposed at the inlet of the second evaporator. The first evaporator is connected to the first intake port. The second evaporator is connected to the second intake port.

[0035] Specifically, the structure of the air conditioning system is as follows: Figure 6 As shown, this air conditioning system is a single-cooling system. On the indoor unit side, valve C (the third throttling component) is installed, which divides the indoor unit's evaporator into a high-temperature evaporator (first evaporator) and a low-temperature evaporator (second evaporator). Additionally, as... Figure 9 As shown, an electric heating element is installed on the fan blades of the indoor unit, positioned closer to the low-temperature evaporator to heat the air there. On the outdoor unit side, a three-cylinder compressor is installed. The first suction port is connected to the high-temperature evaporator, the second suction port to the low-temperature evaporator, and the third suction port to the flash evaporator. On the outdoor unit side, a condenser, valve A (first throttling component), flash evaporator, and valve B (second throttling component) are also installed, connected sequentially to the compressor unit's outlet. During operation, refrigerant flows into the indoor unit through valve B, entering both the high-temperature and low-temperature evaporators for heat exchange.

[0036] Optional, can Figure 6 The system structure shown is modified by adding a four-way valve, enabling the air conditioning system to have a heating function. For example... Figure 7As shown, four-way valves 1 and 2 are added to the outdoor unit side. Four-way valves 1 and 2 are connected to the compressor unit outlet and condenser, respectively. Four-way valve 1 is also connected to the low-temperature evaporator and the second suction port, while four-way valve 2 is connected to the high-temperature evaporator and the first suction port. By changing the direction of four-way valves 1 and 2, the air conditioning system can be operated in heating mode. This air conditioning system can be applied to wall-mounted, floor-standing, and multi-split air conditioners.

[0037] The air conditioning system has an anti-condensation function to prevent condensation from forming inside the indoor unit.

[0038] Because the air conditioning system uses valve C to divide the evaporator into a high-temperature evaporator and a low-temperature evaporator, there is a temperature difference between the two evaporators. This can easily lead to more condensation or water blowing in the low-temperature evaporator. Therefore, it is necessary to prevent condensation and water blowing in the low-temperature evaporator.

[0039] like Figure 1 The diagram shows a flowchart of an embodiment of the method of the present invention. The control method of the air conditioning system may include steps S110 to S130.

[0040] In step S110, when the air conditioning system is operating in cooling mode or dehumidification mode, the pipe temperature of the first evaporator, the pipe temperature of the second evaporator, the suction temperature of the first suction port, the suction temperature of the second suction port, the pipe temperature of the condenser, and the exhaust temperature of the exhaust port are obtained.

[0041] Because condensation accumulates on the evaporator when the air conditioning system is in cooling or dehumidification mode, anti-condensation measures are necessary. Specifically, after the air conditioner has been running in cooling or dehumidification mode for a period of time, condensation begins to accumulate on the evaporator. Temperature sensors are used to obtain the temperature at various points. Temperature data is acquired periodically, and subsequent control methods are implemented to continuously prevent condensation and water discharge from the evaporator.

[0042] In step S120, it is determined whether to activate the anti-condensation function based on the tube temperature of the first evaporator, the tube temperature of the second evaporator, the suction temperature of the first suction port, the suction temperature of the second suction port, the tube temperature of the condenser, and the exhaust temperature of the exhaust port.

[0043] By acquiring temperature data, the anti-condensation function is activated only when condensation or water seepage is predicted, thus achieving precise control over condensation and water seepage.

[0044] In some embodiments, step S120 involves determining whether to activate the anti-condensation function based on the tube temperature of the first evaporator, the tube temperature of the second evaporator, the suction temperature of the first suction port, the suction temperature of the second suction port, the tube temperature of the condenser, and the exhaust temperature of the exhaust port. For example... Figure 2 As shown, it includes steps S210 to S240.

[0045] Step S210: Determine whether the air conditioning system is in a stable state based on the tube temperature of the condenser and the exhaust temperature of the exhaust port.

[0046] In some embodiments, step S210 involves determining whether the air conditioning system is in a stable state based on the tube temperature of the condenser and the exhaust temperature of the exhaust port. For example... Figure 3 As shown, it includes steps S310 to S330.

[0047] Step S310: Determine the exhaust superheat of the compressor based on the tube temperature of the condenser and the exhaust temperature of the exhaust port.

[0048] Specifically, the compressor's exhaust superheat ΔT 排气 =Exhaust temperature T at the exhaust port 排气 -Condenser tube temperature T 外管 .

[0049] Step S320: Determine the relationship between the exhaust superheat of the compressor and the set first exhaust superheat.

[0050] Step S330: If the exhaust superheat of the compressor is greater than or equal to the set first exhaust superheat, then the air conditioning system is determined to be in a stable state.

[0051] If the exhaust superheat is too low during the operation of the air conditioning system, it will affect the stability and reliability of the air conditioning system. When the anti-condensation function is activated, it will have a certain impact on the exhaust superheat. Therefore, in order to avoid the air conditioning system becoming unstable when the anti-condensation function is activated, the anti-condensation function should only be activated after the air conditioning system is judged to be in a stable state based on the exhaust superheat, so as to ensure the stable operation of the air conditioning system.

[0052] Step S220: After determining that the air conditioning system is in a stable state, determine the suction superheat of the first suction port based on the pipe temperature of the first evaporator and the suction temperature of the first suction port; and determine the suction superheat of the second suction port based on the pipe temperature of the second evaporator and the suction temperature of the second suction port.

[0053] Specifically, the intake superheat ΔT at the first intake port 高吸=Intake temperature T at the first intake port 高温吸气 -Temperature of the first evaporator tubes T 高温内管 The intake superheat ΔT at the second intake port 低吸 =Intake temperature T at the second intake port 低温吸气 - Pipe temperature T of the second evaporator 低温内管 .

[0054] Step S230: Determine the relationship between the superheat of the first intake port and the set first intake superheat, and determine the relationship between the superheat of the second intake port and the set second intake superheat.

[0055] Step S240: If the superheat of the first intake port is greater than or equal to the set first intake superheat, or the superheat of the second intake port is greater than or equal to the set second intake superheat, then the anti-condensation function is activated.

[0056] If condensation occurs at the evaporator, it will not only cause water to blow out of the indoor unit, but also affect the heat exchange efficiency of the first and second evaporators.

[0057] In step S130, after the anti-condensation function is activated, the opening degree of the first throttling component, the opening degree of the third throttling component, and the on / off state of the electric heating component are controlled according to the pipe temperature of the first evaporator, the pipe temperature of the second evaporator, the suction temperature of the first suction port, and the suction temperature of the second suction port.

[0058] This solution determines the superheat of the compressor's suction and discharge based on the acquired temperature data, and then determines whether to activate the anti-condensation function. After activating the anti-condensation function, the temperature difference between the first evaporator and the second evaporator is eliminated by controlling the valve opening and the opening and closing of the electric heating component, thereby avoiding condensation and water blowing caused by excessive temperature difference. This not only ensures the high system energy efficiency of the dual-temperature air conditioning system, but also ensures the user's comfort.

[0059] In some embodiments, step S130 involves controlling the opening degree of the first throttling component, the opening degree of the third throttling component, and the on / off state of the electric heating assembly based on the tube temperature of the first evaporator, the tube temperature of the second evaporator, the suction temperature of the first suction port, and the suction temperature of the second suction port, respectively. Figure 4 As shown, it includes steps S410 to S430.

[0060] Step S410: Determine the superheat of the first suction port based on the tube temperature of the first evaporator and the suction temperature of the first suction port; and determine the superheat of the second suction port based on the tube temperature of the second evaporator and the suction temperature of the second suction port.

[0061] Specifically, the intake superheat ΔT at the first intake port 高吸 =Intake temperature T at the first intake port 高温吸气 -Temperature of the first evaporator tubes T 高温内管 The intake superheat ΔT at the second intake port 低吸 =Intake temperature T at the second intake port 低温吸气 - Pipe temperature T of the second evaporator 低温内管 .

[0062] Step S420: Determine the opening adjustment amount of the first throttling component based on the range of the intake superheat of the first intake port; and determine the opening adjustment amount of the third throttling component based on the range of the intake superheat of the second intake port.

[0063] In this design, valve B (the second throttling component) is always at its maximum opening. Control valve A controls the total refrigerant flow rate throughout the entire air conditioning system, and valve C controls the refrigerant flow rate in the low-temperature evaporator. Therefore, by adjusting the opening of valves A and C, the suction superheat of the first and second suction ports can be adjusted.

[0064] For valve A (the first throttling component) and valve C (the third throttling component), different correspondences between intake superheat and opening adjustment need to be set. Specifically, for valve A, if T... A1 <ΔT 高吸 Then the opening adjustment of valve A is +A1; if T A2 <ΔT 高吸 ≤T A1 Then the opening adjustment of valve A is +A2; if T A3 <ΔT 高吸 ≤T A2 Then the opening adjustment of valve A is +A3; if T A4 <ΔT 高吸 ≤T A3 If T, then the opening adjustment of valve A is 0, meaning the opening of valve A is not adjusted; if T A5 <ΔT 高吸 ≤T A4 Then the opening adjustment of valve A is -A4; if ΔT 高吸 ≤T A5 Then the opening adjustment of valve A is -A5. Where A1 > A2 > A3, A5 > A4. For valve C, if T... C1<ΔT 低吸 Then the opening adjustment of valve C is +C1; if T C2 <ΔT 低吸 ≤T C1 Then the opening adjustment of valve C is +C2; if T C3 <ΔT 低吸 ≤T C2 Then the opening adjustment of valve C is +C3; if T C4 <ΔT 低吸 ≤T C3 If T C5 <ΔT 低吸 ≤T C4 Then the opening adjustment of valve C is -C4; if ΔT 低吸 ≤T C5 Then the opening adjustment of valve C is -C5. Where C1 > C2 > C3, C5 > C4.

[0065] Step S430: Control the opening of the first throttling component according to the opening adjustment amount of the first throttling component; and control the opening of the third throttling component according to the opening adjustment amount of the third throttling component.

[0066] For valve A, when the opening adjustment amount of valve A is +A1, then A1 is added to the current opening amount of valve A; when the opening adjustment amount of valve A is +A2, then A2 is added to the current opening amount of valve A; when the opening adjustment amount of valve A is +A3, then A3 is added to the current opening amount of valve A; when the opening adjustment amount of valve A is -A4, then A4 is decreased from the current opening amount of valve A; when the opening adjustment amount of valve A is -A5, then A5 is decreased from the current opening amount of valve A. For valve C, when the opening adjustment amount of valve C is +C1, then C1 is added to the current opening amount of valve C; when the opening adjustment amount of valve C is +C2, then C2 is added to the current opening amount of valve C; when the opening adjustment amount of valve C is +C3, then C3 is added to the current opening amount of valve C; when the opening adjustment amount of valve C is -C4, then C4 is reduced from the current opening amount of valve C; when the opening adjustment amount of valve C is -C5, then C5 is reduced from the current opening amount of valve C.

[0067] When the superheat of the first suction port and the superheat of the second suction port are both high, it indicates that the refrigerant flow rate in the system is too low. Therefore, it is necessary to increase the opening of valve A to increase the refrigerant flow rate in the system.

[0068] When the opening of valve C increases, the throttling and cooling effect of valve C on the refrigerant decreases, thus bringing the refrigerant temperatures flowing into the high-temperature evaporator and the low-temperature evaporator closer together. This reduces the evaporation temperature difference between the two evaporators, preventing condensation from forming due to the temperature difference. Conversely, if the compressor's suction superheat is low, it indicates that there is no condensation or that the condensation does not affect system operation. In this case, the opening of valve C can be appropriately reduced to create a dual-temperature evaporator, thereby improving system energy efficiency.

[0069] In some embodiments, step S130, which involves controlling the opening degree of the first throttling component, the opening degree of the third throttling component, and the opening and closing state of the electric heating component based on the tube temperature of the first evaporator, the tube temperature of the second evaporator, the suction temperature of the first suction port, and the suction temperature of the second suction port, further includes steps S510 and S520.

[0070] Step S510: After controlling the opening degree of the first throttling component and the opening degree of the third throttling component respectively for a first time, determine the relationship between the intake superheat of the first intake port and the set third intake superheat, and determine the relationship between the intake superheat of the second intake port and the set fourth intake superheat.

[0071] Step S520: If the superheat of the first intake port is less than the set third intake superheat, and the superheat of the second intake port is less than the set fourth intake superheat, then the electric heating component is turned on.

[0072] If adjusting the opening of the first and third throttling components still fails to prevent excessive compressor suction overheating due to condensation, then the electric heating element located on the indoor unit's fan blades should be activated. This electric heating element can be an electric heating wire, resistance wire, or electric heating plate. Activating the electric heating element further eliminates the temperature difference between the two evaporators, preventing condensation, and also promotes the evaporation of condensate.

[0073] Optionally, if the compressor suction overheating due to condensation cannot be prevented even when the opening of the first and third throttling components has been adjusted to the maximum opening, the electric heating component installed on the indoor unit fan blades can be turned on.

[0074] Optionally, if the compressor suction superheat is still too high due to condensation even when the opening of the first and third throttling components has been adjusted to the maximum opening, the electric heating component may not be turned on, but the compressor operating frequency may be reduced to reduce suction superheat.

[0075] Optionally, if the compressor suction overheating due to condensation cannot be prevented even when the opening of the first and third throttling components has been adjusted to the maximum opening, the electric heating component installed on the indoor unit fan blades can be turned on, and after a period of time, it can be judged again. If the suction overheating of the first suction port is less than the set third suction overheating and the suction overheating of the second suction port is less than the set fourth suction overheating, the compressor operating frequency can be reduced.

[0076] The present invention determines whether to perform the anti-condensation function by measuring the superheat of the intake and exhaust in the dual-temperature air conditioning system. This ensures the stable and reliable operation of the air conditioning system. By controlling the throttling components and electric heating components, the temperature difference between the two evaporators is reduced, thereby preventing condensation caused by the temperature difference and avoiding water blowing. At the same time, the stability of the compressor is determined during the anti-condensation process.

[0077] In some embodiments, the control method of the air conditioning system further includes a process of turning off the anti-condensation function, which specifically includes steps S610 and S620.

[0078] Step S610: After activating the anti-condensation function, determine the operating status of the compressor, the relationship between the superheat of the first intake port and the set fifth intake superheat, and the relationship between the superheat of the second intake port and the set fifth intake superheat.

[0079] Step S620: If the compressor is in a stopped operating state, or if either the superheat of the first suction port or the superheat of the second suction port is less than the set fifth superheat, then the anti-condensation function is turned off.

[0080] When the superheat of either the first or second intake port is less than the set fifth intake superheat, it indicates that the condensate has been effectively treated and there is currently no condensate at the evaporator. Therefore, the anti-condensation function is deactivated, and the air conditioning system operates in normal cooling or dehumidification mode.

[0081] Figure 8 This is a flowchart illustrating an embodiment of the anti-condensation control method for an air conditioning system according to the present invention, as shown below. Figure 8 As shown, the anti-condensation control method of the present invention includes:

[0082] Step 1: After the dual-temperature air conditioning system has been running in cooling mode or dehumidification mode for time t1, proceed to step 2.

[0083] Step 2: Collect data from each temperature sensor according to the t2 cycle, specifically the pipe temperature of the first evaporator, the pipe temperature of the second evaporator, the suction temperature at the first suction port, the suction temperature at the second suction port, the pipe temperature of the condenser, and the discharge temperature at the discharge port. Calculate the compressor's discharge superheat ΔT based on the collected temperature data. 排气 Intake superheat ΔT at the first intake port 高吸 Intake superheat ΔT at the second intake port 低吸 .

[0084] Step 3, determine ΔT 排气 With the set value T 凝露过热1 The magnitude relationship, if ΔT 排气 <T 凝露过热1 Then the system operates according to the normal heating or dehumidification mode. If ΔT 排气 ≥T 凝露过热1 Then determine ΔT 高吸 With the set value T 凝露过热2 The size relationship and ΔT 低吸 With the set value T 凝露过热3 The magnitude relationship. If ΔT 高吸 ≥T 凝露过热2 Or ΔT 低吸 ≥T 凝露过热3 If the condition is met, proceed to step 3; otherwise, control the system to operate in normal heating or dehumidification mode.

[0085] Step 4, enter anti-condensation control, based on ΔT 高吸 The opening degree of valve A within the specified range is determined by ΔT. 低吸 The opening degree of valve C is adjusted within the specified range, and after a period of time, ΔT is determined. 高吸 and ΔT 低吸 Does any one of them reach the target value? If ΔT 高吸 and ΔT 低吸 If the target value is not reached, turn on the electric heating device on the indoor unit's fan blades, and then proceed to step 4; if ΔT 高吸 and ΔT 低吸 If any one of them reaches the target value, then proceed to step 4.

[0086] Step 5: Determine if the compressor has stopped running. If the compressor has stopped running, exit the anti-condensation control and control the system to operate in normal heating or dehumidification mode. If the compressor has not stopped running, proceed to step 5.

[0087] Step 6, determine ΔT 高吸 With the set value T 凝露过热4 Size relationship, ΔT 低吸 With the set value T 凝露过热5 The magnitude relationship, if ΔT高吸 ≥T 凝露过热4 Or ΔT 低吸 ≥T 凝露过热5 If the anti-condensation control fails, the system will exit and operate in normal heating or dehumidification mode; otherwise, it will determine whether the air conditioning system is turned off. If the air conditioning system is turned off, the operation will end; if the air conditioning system is not turned off, it will return to step 2 and execute again.

[0088] The technical solution of this embodiment determines whether to activate the anti-condensation function when the dual-temperature air conditioning system is operating in cooling or dehumidification mode, based on the pipe temperatures of the first evaporator, the second evaporator, the suction temperature of the first and second suction ports, the pipe temperature of the condenser, and the exhaust temperature of the exhaust port. When the anti-condensation function is activated, the opening degree of the first throttling component at the condenser outlet, the opening degree of the third throttling component at the second evaporator inlet, and the on / off state of the electric heating element on the indoor unit fan blades are controlled according to the pipe temperatures of the first and second evaporators, the suction temperature of the first and second suction ports, and the exhaust temperature of the second suction port. By controlling the opening degree of the throttling components and the on / off state of the electric heating element, the superheat of the low-temperature evaporator is reduced, solving the problem of secondary moisture extraction, condensation, and water blowing caused by excessive superheat in the air duct, thus improving user comfort.

[0089] According to an embodiment of the present invention, a control device for an air conditioning system corresponding to a control method for an air conditioning system is also provided. The air conditioning system includes an outdoor unit and an indoor unit; the outdoor unit includes a three-cylinder compressor, a condenser, a flash evaporator, a first throttling component, and a second throttling component; the three-cylinder compressor has a first intake port, a second intake port, a third intake port, and an exhaust port; the exhaust port is connected to the condenser, the first throttling component, the flash evaporator, and the second throttling component in sequence; the flash evaporator is also connected to the third intake port; the indoor unit includes a first evaporator, a second evaporator, and an electric heating assembly; the electric heating assembly is disposed at the fan blades of the indoor unit; when the electric heating assembly is turned on, it can heat the second evaporator; a third throttling component is disposed at the inlet of the second evaporator; the first evaporator is connected to the first intake port; the second evaporator is connected to the second intake port.

[0090] Specifically, the structure of the air conditioning system is as follows: Figure 6 As shown, this air conditioning system is a single-cooling system. On the indoor unit side, valve C (the third throttling component) is installed, which divides the indoor unit's evaporator into a high-temperature evaporator (first evaporator) and a low-temperature evaporator (second evaporator). Additionally, as... Figure 9As shown, an electric heating element is installed on the fan blades of the indoor unit, positioned closer to the low-temperature evaporator to heat the air there. On the outdoor unit side, a three-cylinder compressor is installed. The first suction port is connected to the high-temperature evaporator, the second suction port to the low-temperature evaporator, and the third suction port to the flash evaporator. On the outdoor unit side, a condenser, valve A (first throttling component), flash evaporator, and valve B (second throttling component) are also installed, connected sequentially to the compressor unit's outlet. During operation, refrigerant flows into the indoor unit through valve B, entering both the high-temperature and low-temperature evaporators for heat exchange.

[0091] Optional, can Figure 6 The system structure shown is modified by adding a four-way valve, enabling the air conditioning system to have a heating function. For example... Figure 7 As shown, four-way valves 1 and 2 are added to the outdoor unit side. Four-way valves 1 and 2 are connected to the compressor unit outlet and condenser, respectively. Four-way valve 1 is also connected to the low-temperature evaporator and the second suction port, while four-way valve 2 is connected to the high-temperature evaporator and the first suction port. By changing the direction of four-way valves 1 and 2, the air conditioning system can be operated in heating mode. This air conditioning system can be applied to wall-mounted, floor-standing, and multi-split air conditioners.

[0092] The air conditioning system has an anti-condensation function to prevent condensation from forming inside the indoor unit.

[0093] Because the air conditioning system uses valve C to divide the evaporator into a high-temperature evaporator and a low-temperature evaporator, there is a temperature difference between the two evaporators. This can easily lead to more condensation or water blowing in the low-temperature evaporator. Therefore, it is necessary to prevent condensation and water blowing in the low-temperature evaporator.

[0094] See Figure 5 The diagram shows a structural schematic of an embodiment of the device of the present invention. The control device of the air conditioning system may include: an acquisition unit 102 and a control unit 104.

[0095] The acquisition unit 102 is configured to acquire the pipe temperature of the first evaporator, the pipe temperature of the second evaporator, the suction temperature of the first suction port, the suction temperature of the second suction port, the pipe temperature of the condenser, and the exhaust temperature of the exhaust port when the air conditioning system is operating in cooling mode or dehumidification mode. The specific functions and processing of this acquisition unit 102 are described in step S110.

[0096] Because condensation accumulates on the evaporator when the air conditioning system is in cooling or dehumidification mode, anti-condensation measures are necessary. Specifically, after the air conditioner has been running in cooling or dehumidification mode for a period of time, condensation begins to accumulate on the evaporator. Temperature sensors are used to obtain the temperature at various points. Temperature data is acquired periodically, and subsequent control methods are implemented to continuously prevent condensation and water discharge from the evaporator.

[0097] Control unit 104 is configured to determine whether to activate the anti-condensation function based on the tube temperature of the first evaporator, the tube temperature of the second evaporator, the suction temperature of the first suction port, the suction temperature of the second suction port, the tube temperature of the condenser, and the exhaust temperature of the exhaust port. The specific functions and processing of this control unit 104 are described in step S120.

[0098] By acquiring temperature data, the anti-condensation function is activated only when condensation or water seepage is predicted, thus achieving precise control over condensation and water seepage.

[0099] In some embodiments, the control unit 104 determines whether to activate the anti-condensation function based on the tube temperature of the first evaporator, the tube temperature of the second evaporator, the suction temperature of the first suction port, the suction temperature of the second suction port, the tube temperature of the condenser, and the exhaust temperature of the exhaust port, including:

[0100] The control unit 104 is further configured to determine whether the air conditioning system is in a stable state based on the pipe temperature of the condenser and the exhaust temperature of the exhaust port. The specific functions and processing of the control unit 104 are described in step S210.

[0101] In some embodiments, the control unit 104 determines whether the air conditioning system is in a stable state based on the condenser pipe temperature and the exhaust temperature at the exhaust port, including:

[0102] The control unit 104 is further configured to determine the exhaust superheat of the compressor based on the tube temperature of the condenser and the exhaust temperature of the exhaust port. The specific functions and processing of this control unit 104 are described in step S310.

[0103] Specifically, the compressor's exhaust superheat ΔT 排气 =Exhaust temperature T at the exhaust port 排气 -Condenser tube temperature T 外管 .

[0104] The control unit 104 is further configured to determine the relationship between the compressor's exhaust superheat and a set first exhaust superheat. The specific functions and processing of the control unit 104 are described in step S320.

[0105] The control unit 104 is further configured to determine that the air conditioning system is in a stable state if the exhaust superheat of the compressor is greater than or equal to a set first exhaust superheat. The specific functions and processing of this control unit 104 are described in step S330.

[0106] If the exhaust superheat is too low during the operation of the air conditioning system, it will affect the stability and reliability of the air conditioning system. When the anti-condensation function is activated, it will have a certain impact on the exhaust superheat. Therefore, in order to avoid the air conditioning system becoming unstable when the anti-condensation function is activated, the anti-condensation function should only be activated after the air conditioning system is judged to be in a stable state based on the exhaust superheat, so as to ensure the stable operation of the air conditioning system.

[0107] The control unit 104 is further configured to, after determining that the air conditioning system is in a stable state, determine the suction superheat of the first suction port based on the pipe temperature of the first evaporator and the suction temperature of the first suction port; and determine the suction superheat of the second suction port based on the pipe temperature of the second evaporator and the suction temperature of the second suction port. The specific functions and processing of this control unit 104 are described in step S220.

[0108] Specifically, the intake superheat ΔT at the first intake port 高吸 =Intake temperature T at the first intake port 高温吸气 -Temperature of the first evaporator tubes T 高温内管 The intake superheat ΔT at the second intake port 低吸 =Intake temperature T at the second intake port 低温吸气 - Pipe temperature T of the second evaporator 低温内管 .

[0109] The control unit 104 is further configured to determine the relationship between the intake superheat of the first intake port and a set first intake superheat, and to determine the relationship between the intake superheat of the second intake port and a set second intake superheat. The specific functions and processing of the control unit 104 are described in step S230.

[0110] The control unit 104 is further configured to activate the anti-condensation function if the intake superheat of the first intake port is greater than or equal to a set first intake superheat, or the intake superheat of the second intake port is greater than or equal to a set second intake superheat. The specific functions and processing of this control unit 104 are described in step S240.

[0111] If condensation occurs at the evaporator, it will not only cause water to blow out of the indoor unit, but also affect the heat exchange efficiency of the first and second evaporators.

[0112] The control unit 104 is further configured to, after activating the anti-condensation function, control the opening degree of the first throttling component, the opening degree of the third throttling component, and the on / off state of the electric heating component, respectively, based on the pipe temperature of the first evaporator, the pipe temperature of the second evaporator, the suction temperature of the first suction port, and the suction temperature of the second suction port. The specific functions and processing of this control unit 104 are described in step S130.

[0113] This solution determines the superheat of the compressor's suction and discharge based on the acquired temperature data, and then determines whether to activate the anti-condensation function. After activating the anti-condensation function, the temperature difference between the first evaporator and the second evaporator is eliminated by controlling the valve opening and the opening and closing of the electric heating component, thereby avoiding condensation and water blowing caused by excessive temperature difference. This not only ensures the high system energy efficiency of the dual-temperature air conditioning system, but also ensures the user's comfort.

[0114] In some embodiments, the control unit 104 controls the opening degree of the first throttling component, the opening degree of the third throttling component, and the on / off state of the electric heating assembly based on the tube temperature of the first evaporator, the tube temperature of the second evaporator, the suction temperature of the first suction port, and the suction temperature of the second suction port, respectively, including:

[0115] The control unit 104 is further configured to determine the suction superheat of the first suction port based on the tube temperature of the first evaporator and the suction temperature of the first suction port; and to determine the suction superheat of the second suction port based on the tube temperature of the second evaporator and the suction temperature of the second suction port. The specific functions and processing of this control unit 104 are described in step S410.

[0116] Specifically, the intake superheat ΔT at the first intake port 高吸 =Intake temperature T at the first intake port 高温吸气 -Temperature of the first evaporator tubes T 高温内管 The intake superheat ΔT at the second intake port 低吸 =Intake temperature T at the second intake port 低温吸气 - Pipe temperature T of the second evaporator 低温内管 .

[0117] The control unit 104 is further configured to determine the opening adjustment amount of the first throttling component based on the range of the intake superheat of the first intake port; and to determine the opening adjustment amount of the third throttling component based on the range of the intake superheat of the second intake port. The specific functions and processing of this control unit 104 are described in step S420.

[0118] In this design, valve B (the second throttling component) is always at its maximum opening. Control valve A controls the total refrigerant flow rate throughout the entire air conditioning system, and valve C controls the refrigerant flow rate in the low-temperature evaporator. Therefore, by adjusting the opening of valves A and C, the suction superheat of the first and second suction ports can be adjusted.

[0119] For valve A (the first throttling component) and valve C (the third throttling component), different correspondences between intake superheat and opening adjustment need to be set. Specifically, for valve A, if T... A1 <ΔT 高吸 Then the opening adjustment of valve A is +A1; if T A2 <ΔT 高吸 ≤T A1 Then the opening adjustment of valve A is +A2; if T A3 <ΔT 高吸 ≤T A2 Then the opening adjustment of valve A is +A3; if T A4 <ΔT 高吸 ≤T A3 If T, then the opening adjustment of valve A is 0, meaning the opening of valve A is not adjusted; if T A5 <ΔT 高吸 ≤T A4 Then the opening adjustment of valve A is -A4; if ΔT 高吸 ≤T A5 Then the opening adjustment of valve A is -A5. Where A1 > A2 > A3, A5 > A4. For valve C, if T... C1 <ΔT 低吸 Then the opening adjustment of valve C is +C1; if T C2 <ΔT 低吸 ≤T C1 Then the opening adjustment of valve C is +C2; if T C3 <ΔT 低吸 ≤T C2 Then the opening adjustment of valve C is +C3; if T C4 <ΔT 低吸 ≤T C3 If T C5 <ΔT 低吸 ≤TC4 Then the opening adjustment of valve C is -C4; if ΔT 低吸 ≤T C5 Then the opening adjustment of valve C is -C5. Where C1 > C2 > C3, C5 > C4.

[0120] The control unit 104 is further configured to control the opening degree of the first throttling component according to the opening degree adjustment amount of the first throttling component; and to control the opening degree of the third throttling component according to the opening degree adjustment amount of the third throttling component. The specific functions and processing of this control unit 104 are described in step S430.

[0121] For valve A, when the opening adjustment amount of valve A is +A1, then A1 is added to the current opening amount of valve A; when the opening adjustment amount of valve A is +A2, then A2 is added to the current opening amount of valve A; when the opening adjustment amount of valve A is +A3, then A3 is added to the current opening amount of valve A; when the opening adjustment amount of valve A is -A4, then A4 is decreased from the current opening amount of valve A; when the opening adjustment amount of valve A is -A5, then A5 is decreased from the current opening amount of valve A. For valve C, when the opening adjustment amount of valve C is +C1, then C1 is added to the current opening amount of valve C; when the opening adjustment amount of valve C is +C2, then C2 is added to the current opening amount of valve C; when the opening adjustment amount of valve C is +C3, then C3 is added to the current opening amount of valve C; when the opening adjustment amount of valve C is -C4, then C4 is reduced from the current opening amount of valve C; when the opening adjustment amount of valve C is -C5, then C5 is reduced from the current opening amount of valve C.

[0122] When the superheat of the first suction port and the superheat of the second suction port are both high, it indicates that the refrigerant flow rate in the system is too low. Therefore, it is necessary to increase the opening of valve A to increase the refrigerant flow rate in the system.

[0123] When the opening of valve C increases, the throttling and cooling effect of valve C on the refrigerant decreases, thus bringing the refrigerant temperatures flowing into the high-temperature evaporator and the low-temperature evaporator closer together. This reduces the evaporation temperature difference between the two evaporators, preventing condensation from forming due to the temperature difference. Conversely, if the compressor's suction superheat is low, it indicates that there is no condensation or that the condensation does not affect system operation. In this case, the opening of valve C can be appropriately reduced to create a dual-temperature evaporator, thereby improving system energy efficiency.

[0124] In some embodiments, the control unit 104, based on the tube temperature of the first evaporator, the tube temperature of the second evaporator, the suction temperature of the first suction port, and the suction temperature of the second suction port, controls the opening degree of the first throttling component, the opening degree of the third throttling component, and the on / off state of the electric heating assembly, respectively, and further includes:

[0125] The control unit 104 is further configured to, after controlling the opening degree of the first throttling component and the opening degree of the third throttling component respectively for a first time, determine the relationship between the intake superheat of the first intake port and the set third intake superheat, and determine the relationship between the intake superheat of the second intake port and the set fourth intake superheat. The specific functions and processing of this control unit 104 are described in step S510.

[0126] The control unit 104 is further configured to activate the electric heating assembly if the intake superheat of the first intake port is less than a set third intake superheat and the intake superheat of the second intake port is less than a set fourth intake superheat. The specific functions and processing of this control unit 104 are described in step S520.

[0127] If adjusting the opening of the first and third throttling components still fails to prevent excessive compressor suction overheating due to condensation, then the electric heating element located on the indoor unit's fan blades should be activated. This electric heating element can be an electric heating wire, resistance wire, or electric heating plate. Activating the electric heating element further eliminates the temperature difference between the two evaporators, preventing condensation, and also promotes the evaporation of condensate.

[0128] Optionally, if the compressor suction overheating due to condensation cannot be prevented even when the opening of the first and third throttling components has been adjusted to the maximum opening, the electric heating component installed on the indoor unit fan blades can be turned on.

[0129] Optionally, if the compressor suction superheat is still too high due to condensation even when the opening of the first and third throttling components has been adjusted to the maximum opening, the electric heating component may not be turned on, but the compressor operating frequency may be reduced to reduce suction superheat.

[0130] Optionally, if the compressor suction overheating due to condensation cannot be prevented even when the opening of the first and third throttling components has been adjusted to the maximum opening, the electric heating component installed on the indoor unit fan blades can be turned on, and after a period of time, it can be judged again. If the suction overheating of the first suction port is less than the set third suction overheating and the suction overheating of the second suction port is less than the set fourth suction overheating, the compressor operating frequency can be reduced.

[0131] The present invention determines whether to perform the anti-condensation function by measuring the superheat of the intake and exhaust in the dual-temperature air conditioning system. This ensures the stable and reliable operation of the air conditioning system. By controlling the throttling components and electric heating components, the temperature difference between the two evaporators is reduced, thereby preventing condensation caused by the temperature difference and avoiding water blowing. At the same time, the stability of the compressor is determined during the anti-condensation process.

[0132] In some embodiments, the control unit 104 further includes:

[0133] The control unit 104 is further configured to, after activating the anti-condensation function, determine the operating status of the compressor, the relationship between the suction superheat of the first suction port and the set fifth suction superheat, and the relationship between the suction superheat of the second suction port and the set fifth suction superheat. The specific functions and processing of this control unit 104 are described in step S610.

[0134] The control unit 104 is further configured to disable the anti-condensation function if the compressor is in a stopped operating state, or if either the suction superheat of the first suction port or the suction superheat of the second suction port is less than a set fifth suction superheat. The specific functions and processing of this control unit 104 are described in step S620.

[0135] When the superheat of either the first or second intake port is less than the set fifth intake superheat, it indicates that the condensate has been effectively treated and there is currently no condensate at the evaporator. Therefore, the anti-condensation function is deactivated, and the air conditioning system operates in normal cooling or dehumidification mode.

[0136] Figure 8 This is a flowchart illustrating an embodiment of the anti-condensation control method for an air conditioning system according to the present invention, as shown below. Figure 8 As shown, the anti-condensation control method of the present invention includes:

[0137] Step 1: After the dual-temperature air conditioning system has been running in cooling mode or dehumidification mode for time t1, proceed to step 2.

[0138] Step 2: Collect data from each temperature sensor according to the t2 cycle, specifically the pipe temperature of the first evaporator, the pipe temperature of the second evaporator, the suction temperature at the first suction port, the suction temperature at the second suction port, the pipe temperature of the condenser, and the discharge temperature at the discharge port. Calculate the compressor's discharge superheat ΔT based on the collected temperature data. 排气 Intake superheat ΔT at the first intake port 高吸 Intake superheat ΔT at the second intake port 低 suck.

[0139] Step 3, determine ΔT 排气 With the set value T 凝露过热1 The magnitude relationship, if ΔT 排气 <T 凝露过热1 Then the system operates according to the normal heating or dehumidification mode. If ΔT 排气 ≥T 凝露过热1 Then determine ΔT 高吸 With the set value T 凝露过热2 The size relationship and ΔT 低吸 With the set value T 凝露过热3 The magnitude relationship. If ΔT 高吸 ≥T 凝露过热2 Or ΔT 低吸 ≥T 凝露过热3 If the condition is met, proceed to step 3; otherwise, control the system to operate in normal heating or dehumidification mode.

[0140] Step 4, enter anti-condensation control, based on ΔT 高吸 The opening degree of valve A within the specified range is determined by ΔT. 低吸 The opening degree of valve C is adjusted within the specified range, and after a period of time, ΔT is determined. 高吸 and ΔT 低吸 Does any one of them reach the target value? If ΔT 高吸 and ΔT 低吸 If the target value is not reached, turn on the electric heating device on the indoor unit's fan blades, and then proceed to step 4; if ΔT 高吸 and ΔT 低吸 If any one of them reaches the target value, then proceed to step 4.

[0141] Step 5: Determine if the compressor has stopped running. If the compressor has stopped running, exit the anti-condensation control and control the system to operate in normal heating or dehumidification mode. If the compressor has not stopped running, proceed to step 5.

[0142] Step 6, determine ΔT 高吸 With the set value T 凝露过热4 Size relationship, ΔT 低吸 With the set value T 凝露过热5 The magnitude relationship, if ΔT 高吸 ≥T 凝露过热4 Or ΔT 低吸 ≥T 凝露过热5 If the anti-condensation control fails, the system will exit and operate in normal heating or dehumidification mode; otherwise, it will determine whether the air conditioning system is turned off. If the air conditioning system is turned off, the operation will end; if the air conditioning system is not turned off, it will return to step 2 and execute again.

[0143] Since the processing and functions implemented by the device in this embodiment are basically the same as the embodiments, principles and examples of the aforementioned methods, any details not covered in the description of this embodiment can be found in the relevant descriptions in the aforementioned embodiments, and will not be repeated here.

[0144] By employing the technical solution of this invention, when the dual-temperature air conditioning system is operating in cooling or dehumidification mode, the activation of the anti-condensation function is determined based on the pipe temperatures of the first evaporator, the second evaporator, the suction temperature of the first and second suction ports, the pipe temperature of the condenser, and the exhaust temperature of the exhaust port. After activating the anti-condensation function, the opening degree of the first throttling component at the condenser outlet, the opening degree of the third throttling component at the second evaporator inlet, and the on / off state of the electric heating element on the indoor unit fan blades are controlled based on the pipe temperatures of the first and second evaporators, the suction temperature of the first and second suction ports, and the suction temperature of the second suction port. This control of the throttling component opening degree and the on / off state of the electric heating element reduces the superheat of the low-temperature evaporator, solving the problem of secondary moisture extraction, condensation, and water blowing caused by excessive superheat in the air duct, thus improving user comfort.

[0145] According to an embodiment of the present invention, an air conditioning system corresponding to a control device for an air conditioning system is also provided. This air conditioning system may include the control device for the air conditioning system described above.

[0146] Since the processing and functions implemented by the air conditioning system in this embodiment are basically the same as those of the aforementioned device embodiments, principles and examples, any details not covered in this embodiment can be found in the relevant descriptions in the aforementioned embodiments, and will not be repeated here.

[0147] By employing the technical solution of this invention, when the dual-temperature air conditioning system is operating in cooling or dehumidification mode, the activation of the anti-condensation function is determined based on the pipe temperatures of the first evaporator, the second evaporator, the suction temperature of the first and second suction ports, the pipe temperature of the condenser, and the exhaust temperature of the exhaust port. After activating the anti-condensation function, the opening degree of the first throttling component at the condenser outlet, the opening degree of the third throttling component at the second evaporator inlet, and the on / off state of the electric heating element on the indoor unit fan blades are controlled based on the pipe temperatures of the first and second evaporators, the suction temperature of the first and second suction ports, and the suction temperature of the second suction port. This control of the throttling component opening degree and the on / off state of the electric heating element reduces the superheat of the low-temperature evaporator, solving the problem of secondary moisture extraction, condensation, and water blowing caused by excessive superheat in the air duct, thus improving user comfort.

[0148] According to an embodiment of the present invention, a storage medium corresponding to a control method for an air conditioning system is also provided. The storage medium includes a stored program, wherein the program controls the device where the storage medium is located to execute the control method for the air conditioning system described above when it is executed.

[0149] Since the processing and functions implemented by the storage medium in this embodiment are basically the same as the embodiments, principles and examples of the aforementioned methods, any details not covered in this embodiment can be found in the relevant descriptions in the aforementioned embodiments, and will not be repeated here.

[0150] By employing the technical solution of this invention, when the dual-temperature air conditioning system is operating in cooling or dehumidification mode, the activation of the anti-condensation function is determined based on the pipe temperatures of the first evaporator, the second evaporator, the suction temperature of the first and second suction ports, the pipe temperature of the condenser, and the exhaust temperature of the exhaust port. After activating the anti-condensation function, the opening degree of the first throttling component at the condenser outlet, the opening degree of the third throttling component at the second evaporator inlet, and the on / off state of the electric heating element on the indoor unit fan blades are controlled based on the pipe temperatures of the first and second evaporators, the suction temperature of the first and second suction ports, and the suction temperature of the second suction port. This control of the throttling component opening degree and the on / off state of the electric heating element reduces the superheat of the low-temperature evaporator, solving the problem of secondary moisture extraction, condensation, and water blowing caused by excessive superheat in the air duct, thus improving user comfort.

[0151] In summary, it is readily understood by those skilled in the art that, without conflict, the aforementioned advantageous methods can be freely combined and superimposed.

[0152] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A control method of an air conditioning system, characterized by, The air conditioning system includes an outdoor unit and an indoor unit; the outdoor unit includes a three-cylinder compressor, a condenser, a flash evaporator, a first throttling component, and a second throttling component; the three-cylinder compressor has a first intake port, a second intake port, a third intake port, and an exhaust port; the exhaust port is sequentially connected to the condenser, the first throttling component, the flash evaporator, and the second throttling component; the flash evaporator is also connected to the third intake port; the indoor unit includes a first evaporator, a second evaporator, and an electric heating component; the electric heating component is located at the fan blades of the indoor unit; compared to the first evaporator, the electric heating component is located closer to the second evaporator; when the electric heating component is turned on, it can heat the second evaporator; a third throttling component is provided at the inlet of the second evaporator; the first evaporator is connected to the first intake port; the second evaporator is connected to the second intake port; the air conditioning system has an anti-condensation function to prevent condensation from forming inside the indoor unit; the method includes: When the air conditioning system is operating in cooling mode or dehumidification mode, the pipe temperature of the first evaporator, the pipe temperature of the second evaporator, the suction temperature of the first suction port, the suction temperature of the second suction port, the pipe temperature of the condenser, and the exhaust temperature of the exhaust port are obtained. The anti-condensation function is determined based on the tube temperature of the first evaporator, the tube temperature of the second evaporator, the suction temperature of the first suction port, the suction temperature of the second suction port, the tube temperature of the condenser, and the exhaust temperature of the exhaust port. After the anti-condensation function is activated, the opening degree of the first throttling component, the opening degree of the third throttling component, and the on / off state of the electric heating component are controlled according to the tube temperature of the first evaporator, the tube temperature of the second evaporator, the suction temperature of the first suction port, and the suction temperature of the second suction port.

2. The control method of the air conditioning system according to claim 1, characterized by, Based on the tube temperature of the first evaporator, the tube temperature of the second evaporator, the suction temperature of the first suction port, the suction temperature of the second suction port, the tube temperature of the condenser, and the exhaust temperature of the exhaust port, determine whether to activate the anti-condensation function, including: Based on the tube temperature of the condenser and the exhaust temperature of the exhaust port, determine whether the air conditioning system is in a stable state; After determining that the air conditioning system is in a stable state, the suction superheat of the first suction port is determined based on the tube temperature of the first evaporator and the suction temperature of the first suction port; and the suction superheat of the second suction port is determined based on the tube temperature of the second evaporator and the suction temperature of the second suction port. Determine the relationship between the intake superheat of the first intake port and the set first intake superheat, and determine the relationship between the intake superheat of the second intake port and the set second intake superheat. If the superheat of the first intake port is greater than or equal to the set first intake superheat, or the superheat of the second intake port is greater than or equal to the set second intake superheat, then the anti-condensation function is activated.

3. The control method of the air conditioning system according to claim 2, characterized by, Determining whether the air conditioning system is in a stable state based on the condenser tube temperature and the exhaust temperature at the exhaust port includes: The exhaust superheat of the compressor is determined based on the tube temperature of the condenser and the exhaust temperature of the exhaust port. Determine the relationship between the exhaust superheat of the compressor and the set first exhaust superheat; If the exhaust superheat of the compressor is greater than or equal to the set first exhaust superheat, then the air conditioning system is determined to be in a stable state.

4. The control method of the air conditioning system according to claim 1, characterized by, Based on the tube temperature of the first evaporator, the tube temperature of the second evaporator, the suction temperature of the first suction port, and the suction temperature of the second suction port, the opening degree of the first throttling component, the opening degree of the third throttling component, and the on / off state of the electric heating assembly are controlled, including: The superheat of the first suction port is determined based on the tube temperature of the first evaporator and the suction temperature of the first suction port; and the superheat of the second suction port is determined based on the tube temperature of the second evaporator and the suction temperature of the second suction port. The opening adjustment amount of the first throttling component is determined based on the range of the intake superheat of the first intake port; and the opening adjustment amount of the third throttling component is determined based on the range of the intake superheat of the second intake port. The opening degree of the first throttling component is controlled according to the opening degree adjustment amount of the first throttling component; and the opening degree of the third throttling component is controlled according to the opening degree adjustment amount of the third throttling component.

5. The control method of the air conditioning system according to claim 4, characterized by, Based on the tube temperature of the first evaporator, the tube temperature of the second evaporator, the suction temperature of the first suction port, and the suction temperature of the second suction port, the opening degree of the first throttling component, the opening degree of the third throttling component, and the on / off state of the electric heating assembly are controlled respectively, and the following is also included: After controlling the opening degree of the first throttling component and the opening degree of the third throttling component respectively for a first time, the relationship between the intake superheat degree of the first intake port and the set third intake superheat degree is determined, and the relationship between the intake superheat degree of the second intake port and the set fourth intake superheat degree is determined. If the superheat of the first intake port is less than the set third intake superheat, and the superheat of the second intake port is less than the set fourth intake superheat, then the electric heating component is turned on.

6. The control method for the air conditioning system according to any one of claims 1-5, characterized in that, Also includes: After the anti-condensation function is activated, the operating status of the compressor, the relationship between the superheat of the first intake port and the set fifth intake superheat, and the relationship between the superheat of the second intake port and the set fifth intake superheat are determined. If the compressor is in a stopped operating state, or if either the superheat of the first suction port or the superheat of the second suction port is less than the set fifth superheat, then the anti-condensation function is turned off.

7. A control device for an air conditioning system, characterized in that, The air conditioning system includes an outdoor unit and an indoor unit; the outdoor unit includes a three-cylinder compressor, a condenser, a flash evaporator, a first throttling component, and a second throttling component; the three-cylinder compressor has a first intake port, a second intake port, a third intake port, and an exhaust port; the exhaust port is sequentially connected to the condenser, the first throttling component, the flash evaporator, and the second throttling component; the flash evaporator is also connected to the third intake port; the indoor unit includes a first evaporator, a second evaporator, and an electric heating component; the electric heating component is located at the fan blades of the indoor unit; compared to the first evaporator, the electric heating component is located closer to the second evaporator; when the electric heating component is turned on, it can heat the second evaporator; a third throttling component is provided at the inlet of the second evaporator; the first evaporator is connected to the first intake port; the second evaporator is connected to the second intake port; the air conditioning system has an anti-condensation function to prevent condensation from forming inside the indoor unit; the device includes: The acquisition unit is configured to acquire the pipe temperature of the first evaporator, the pipe temperature of the second evaporator, the suction temperature of the first suction port, the suction temperature of the second suction port, the pipe temperature of the condenser, and the exhaust temperature of the exhaust port when the air conditioning system is operating in cooling mode or dehumidification mode. The control unit is configured to determine whether to activate the anti-condensation function based on the tube temperature of the first evaporator, the tube temperature of the second evaporator, the suction temperature of the first suction port, the suction temperature of the second suction port, the tube temperature of the condenser, and the exhaust temperature of the exhaust port. The control unit is further configured to, after activating the anti-condensation function, control the opening degree of the first throttling component, the opening degree of the third throttling component, and the on / off state of the electric heating component according to the pipe temperature of the first evaporator, the pipe temperature of the second evaporator, the suction temperature of the first suction port, and the suction temperature of the second suction port.

8. The control device for the air conditioning system according to claim 7, characterized in that, The control unit determines whether to activate the anti-condensation function based on the pipe temperature of the first evaporator, the pipe temperature of the second evaporator, the suction temperature of the first suction port, the suction temperature of the second suction port, the pipe temperature of the condenser, and the exhaust temperature of the exhaust port, including: Based on the tube temperature of the condenser and the exhaust temperature of the exhaust port, determine whether the air conditioning system is in a stable state; After determining that the air conditioning system is in a stable state, the suction superheat of the first suction port is determined based on the tube temperature of the first evaporator and the suction temperature of the first suction port; and the suction superheat of the second suction port is determined based on the tube temperature of the second evaporator and the suction temperature of the second suction port. Determine the relationship between the intake superheat of the first intake port and the set first intake superheat, and determine the relationship between the intake superheat of the second intake port and the set second intake superheat. If the superheat of the first intake port is greater than or equal to the set first intake superheat, or the superheat of the second intake port is greater than or equal to the set second intake superheat, then the anti-condensation function is activated.

9. The control device for the air conditioning system according to claim 8, characterized in that, The control unit determines whether the air conditioning system is in a stable state based on the condenser pipe temperature and the exhaust temperature at the exhaust port, including: The exhaust superheat of the compressor is determined based on the tube temperature of the condenser and the exhaust temperature of the exhaust port. Determine the relationship between the exhaust superheat of the compressor and the set first exhaust superheat; If the exhaust superheat of the compressor is greater than or equal to the set first exhaust superheat, then the air conditioning system is determined to be in a stable state.

10. The control device for the air conditioning system according to claim 7, characterized in that, The control unit, based on the tube temperature of the first evaporator, the tube temperature of the second evaporator, the suction temperature of the first suction port, and the suction temperature of the second suction port, controls the opening degree of the first throttling component, the opening degree of the third throttling component, and the on / off state of the electric heating assembly, respectively, including: The superheat of the first suction port is determined based on the tube temperature of the first evaporator and the suction temperature of the first suction port; and the superheat of the second suction port is determined based on the tube temperature of the second evaporator and the suction temperature of the second suction port. The opening adjustment amount of the first throttling component is determined based on the range of the intake superheat of the first intake port; and the opening adjustment amount of the third throttling component is determined based on the range of the intake superheat of the second intake port. The opening degree of the first throttling component is controlled according to the opening degree adjustment amount of the first throttling component; and the opening degree of the third throttling component is controlled according to the opening degree adjustment amount of the third throttling component.

11. The control device for an air conditioning system according to claim 10, characterized in that, The control unit, based on the tube temperature of the first evaporator, the tube temperature of the second evaporator, the suction temperature of the first suction port, and the suction temperature of the second suction port, controls the opening degree of the first throttling component, the opening degree of the third throttling component, and the on / off state of the electric heating assembly, respectively, and further includes: After controlling the opening degree of the first throttling component and the opening degree of the third throttling component respectively for a first time, the relationship between the intake superheat degree of the first intake port and the set third intake superheat degree is determined, and the relationship between the intake superheat degree of the second intake port and the set fourth intake superheat degree is determined. If the superheat of the first intake port is less than the set third intake superheat, and the superheat of the second intake port is less than the set fourth intake superheat, then the electric heating component is turned on.

12. The control device for the air conditioning system according to any one of claims 7-11, characterized in that, The control unit further includes: After the anti-condensation function is activated, the operating status of the compressor, the relationship between the superheat of the first intake port and the set fifth intake superheat, and the relationship between the superheat of the second intake port and the set fifth intake superheat are determined. If the compressor is in a stopped operating state, or if either the superheat of the first suction port or the superheat of the second suction port is less than the set fifth superheat, then the anti-condensation function is turned off.

13. An air conditioning system, characterized in that, include: The control device for the air conditioning system as described in any one of claims 7 to 12.

14. A storage medium, characterized in that, The storage medium includes a stored program, wherein, when the program is executed, the device containing the storage medium is controlled to perform the control method of the air conditioning system according to any one of claims 1 to 6.

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