CN117490189A

CN117490189A - Control method and device of air conditioning system, air conditioning system and storage medium

Info

Publication number: CN117490189A
Application number: CN202311710906.8A
Authority: CN
Inventors: 袁琪; 陈桂福; 聂宝平; 李欣; 杨爱玲
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2023-12-13
Filing date: 2023-12-13
Publication date: 2024-02-02

Abstract

The invention discloses a control method and a device of an air conditioning system, the air conditioning system and a storage medium, wherein an indoor unit of the air conditioning system is provided with a dual-temperature evaporator which is respectively connected with a first air suction port and a second air suction port of an outdoor unit compressor; a third throttling component is arranged at the inlet of one evaporator, and the indoor unit is also provided with an electric heating component for heating the evaporator; a first throttling component is arranged at the outlet of the condenser; the air conditioning system has an anti-condensation function; the method comprises the following steps: in a refrigeration mode or a dehumidification mode, determining whether to open the condensation preventing function according to the tube temperature of the dual-temperature evaporator, the suction and exhaust temperature of the compressor and the tube temperature of the condenser; after the condensation preventing function is started, the opening degrees of the first throttling part and the third throttling part and the opening and closing state of the electric heating component are respectively controlled according to the temperature data. Thereby reducing the superheat degree of the low-temperature evaporator and solving the problems of condensation and water blowing caused by secondary wet air moisture precipitation in the air duct due to large superheat degree.

Description

Control method and device of air conditioning system, air conditioning system and storage medium

Technical Field

The invention belongs to the technical field of air conditioners, and particularly relates to a control method and device of an air conditioning system, the air conditioning system and a storage medium, in particular to a control method and device of condensation prevention of a dual-temperature air conditioning system, the dual-temperature air conditioning system and the storage medium.

Background

The outer machine of the double-temperature air conditioning system adopts a three-cylinder compressor and a plurality of throttling devices, and the inner machine adopts a double-temperature evaporator. The double-temperature evaporator is two evaporators with different evaporating temperatures, a temperature difference exists between the two evaporators, two strands of wet air with different temperatures can be formed after the wet air passes through the two evaporators, and if the dew point temperature of the wet air with high humidity is higher than that of the wet air with low humidity, the wet air can be secondarily separated out to form condensed water in an air duct, and the condensed water is blown out along with wind leaves, so that a water blowing phenomenon occurs.

The foregoing is provided merely for the purpose of facilitating understanding of the technical solutions of the present invention and is not intended to represent an admission that the foregoing is prior art.

Disclosure of Invention

The invention aims to provide a control method and device of an air conditioning system, the air conditioning system and a storage medium, so as to solve the problems that in the related scheme, due to the fact that temperature difference exists between two evaporators in the double-temperature air conditioning system, the dew point temperature of wet air with high humidity is larger than that of wet air with low humidity, the wet air can be secondarily separated and wet to form condensed water in an air duct, the condensed water is blown out along with wind blades, and water blowing occurs.

The invention provides a control method of an air conditioning system, which comprises the following steps: an outdoor unit and an indoor unit; the outdoor unit includes: a three-cylinder compressor, a condenser, a flash vessel, a first throttling element and a second throttling element; the three-cylinder compressor is provided with a first air suction port, a second air suction port, a third air suction port and an exhaust port; the exhaust port is connected with the condenser, the first throttling part, the flash evaporator and the second throttling part in sequence; the flash device is also connected with the third air suction port; the indoor unit includes: a first evaporator, a second evaporator and an electrical heating assembly; the electric heating component is arranged at the fan blade of the indoor unit; after the electric heating component is started, the second evaporator can be heated; a third throttling part is arranged at the inlet of the second evaporator; the first evaporator is connected with the first air suction port; the second evaporator is connected with the second air suction port; the air conditioning system has a condensation preventing function and is used for preventing condensation inside the indoor unit; the method comprises the following steps: when the air conditioning system operates in a refrigeration mode or a dehumidification mode, acquiring 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; determining whether to turn on the anti-condensation function according to 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 condensation preventing function is started, the opening degree of the first throttling part, the opening degree of the third throttling part and the opening and closing state of the electric heating assembly are respectively controlled according to the tube temperature of the first evaporator, the tube temperature of the second evaporator, the air suction temperature of the first air suction port and the air suction temperature of the second air suction port.

In some embodiments, determining whether to turn on the anti-condensation function based on a tube temperature of the first evaporator, a tube temperature of the second evaporator, a suction temperature of the first suction port, a suction temperature of the second suction port, a tube temperature of the condenser, and an exhaust temperature of the exhaust port includes: determining whether the air conditioning system is in a stable state according to the pipe temperature of the condenser and the exhaust temperature of the exhaust port; after the air conditioning system is in a stable state, determining the suction superheat degree of the first suction port according to the tube temperature of the first evaporator and the suction temperature of the first suction port; determining the suction superheat degree of the second suction port according to the tube temperature of the second evaporator and the suction temperature of the second suction port; judging the magnitude relation between the suction superheat degree of the first suction port and the set first suction superheat degree, and judging the magnitude relation between the suction superheat degree of the second suction port and the set second suction superheat degree; and if the suction superheat degree of the first suction port is greater than or equal to the set first suction superheat degree or the suction superheat degree of the second suction port is greater than or equal to the set second suction superheat degree, determining to start the anti-condensation function.

In some embodiments, determining whether the air conditioning system is in a steady state based on the tube temperature of the condenser and the discharge temperature of the discharge port comprises: determining an exhaust superheat degree of the compressor according to a tube temperature of the condenser and an exhaust temperature of the exhaust port; judging the relationship between the degree of superheat of the exhaust gas of the compressor and the degree of superheat of the set first degree of superheat of the exhaust gas; and if the exhaust superheat degree of the compressor is greater than or equal to the set first exhaust superheat degree, determining that the air conditioning system is in a stable state.

In some embodiments, controlling the opening degree of the first throttle member, the opening degree of the third throttle member, and the on-off state of the electric heating assembly 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, includes: determining the suction superheat degree of the first suction port according to the tube temperature of the first evaporator and the suction temperature of the first suction port; determining the suction superheat degree of the second suction port according to 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 part according to the interval range of the suction superheat degree of the first suction port; determining the opening degree adjustment amount of the third throttling component according to the interval range of the suction superheat degree of the second suction port; controlling the opening degree of the first throttling part according to the opening degree adjusting amount of the first throttling part; and controlling the opening degree of the third throttling part according to the opening degree adjusting amount of the third throttling part.

In some embodiments, controlling the opening degree of the first throttle member, the opening degree of the third throttle member, and the on-off state of the electric heating assembly 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, further includes: after the first time of controlling the opening degree of the first throttling part and the opening degree of the third throttling part respectively, judging the magnitude relation between the air suction superheat degree of the first air suction port and the set third air suction superheat degree and judging the magnitude relation between the air suction superheat degree of the second air suction port and the set fourth air suction superheat degree; and if the suction superheat degree of the first suction port is smaller than the set third suction superheat degree and the suction superheat degree of the second suction port is smaller than the set fourth suction superheat degree, starting the electric heating assembly.

In some embodiments, further comprising: after the condensation preventing function is started, judging the operation state of the compressor, the relation between the suction superheat degree of the first suction port and the set fifth suction superheat degree and the relation between the suction superheat degree of the second suction port and the set fifth suction superheat degree; and if the operation state of the compressor is stop operation or any one of the suction superheat degree of the first suction port and the suction superheat degree of the second suction port is smaller than a set fifth suction superheat degree, closing the anti-condensation function.

In accordance 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 includes: a three-cylinder compressor, a condenser, a flash vessel, a first throttling element and a second throttling element; the three-cylinder compressor is provided with a first air suction port, a second air suction port, a third air suction port and an exhaust port; the exhaust port is connected with the condenser, the first throttling part, the flash evaporator and the second throttling part in sequence; the flash device is also connected with the third air suction port; the indoor unit includes: a first evaporator, a second evaporator and an electrical heating assembly; the electric heating component is arranged at the fan blade of the indoor unit; after the electric heating component is started, the second evaporator can be heated; a third throttling part is arranged at the inlet of the second evaporator; the first evaporator is connected with the first air suction port; the second evaporator is connected with the second air suction port; the air conditioning system has a condensation preventing function and is used for preventing condensation inside the indoor unit; the device comprises: an acquisition unit configured to acquire a tube temperature of the first evaporator, a tube temperature of the second evaporator, an intake temperature of the first intake port, an intake temperature of the second intake port, a tube temperature of the condenser, and an exhaust temperature of the exhaust port when the air conditioning system is operated in a cooling mode or a dehumidifying mode; a control unit configured to determine whether to turn on the condensation preventing function according to a tube temperature of the first evaporator, a tube temperature of the second evaporator, a suction temperature of the first suction port, a suction temperature of the second suction port, a tube temperature of the condenser, and an exhaust temperature of the exhaust port; the control unit is further configured to control the opening degree of the first throttling part, the opening degree of the third throttling part and the opening and closing state of the electric heating assembly according to the tube temperature of the first evaporator, the tube temperature of the second evaporator, the air suction temperature of the first air suction port and the air suction temperature of the second air suction port after the condensation preventing function is started.

In some embodiments, the control unit determines whether to turn on the condensation preventing function according to a tube temperature of the first evaporator, a tube temperature of the second evaporator, an intake air temperature of the first intake port, an intake air temperature of the second intake port, a tube temperature of the condenser, and an exhaust air temperature of the exhaust port, including: determining whether the air conditioning system is in a stable state according to the pipe temperature of the condenser and the exhaust temperature of the exhaust port; after the air conditioning system is in a stable state, determining the suction superheat degree of the first suction port according to the tube temperature of the first evaporator and the suction temperature of the first suction port; determining the suction superheat degree of the second suction port according to the tube temperature of the second evaporator and the suction temperature of the second suction port; judging the magnitude relation between the suction superheat degree of the first suction port and the set first suction superheat degree, and judging the magnitude relation between the suction superheat degree of the second suction port and the set second suction superheat degree; and if the suction superheat degree of the first suction port is greater than or equal to the set first suction superheat degree or the suction superheat degree of the second suction port is greater than or equal to the set second suction superheat degree, determining to start the anti-condensation function.

In some embodiments, the control unit determines whether the air conditioning system is in a steady state according to a tube temperature of the condenser and an exhaust temperature of the exhaust port, including: determining an exhaust superheat degree of the compressor according to a tube temperature of the condenser and an exhaust temperature of the exhaust port; judging the relationship between the degree of superheat of the exhaust gas of the compressor and the degree of superheat of the set first degree of superheat of the exhaust gas; and if the exhaust superheat degree of the compressor is greater than or equal to the set first exhaust superheat degree, determining that the air conditioning system is in a stable state.

In some embodiments, the control unit controls the opening degree of the first throttle member, the opening degree of the third throttle member, and the on-off state of the electric heating assembly 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, including: determining the suction superheat degree of the first suction port according to the tube temperature of the first evaporator and the suction temperature of the first suction port; determining the suction superheat degree of the second suction port according to 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 part according to the interval range of the suction superheat degree of the first suction port; determining the opening degree adjustment amount of the third throttling component according to the interval range of the suction superheat degree of the second suction port; controlling the opening degree of the first throttling part according to the opening degree adjusting amount of the first throttling part; and controlling the opening degree of the third throttling part according to the opening degree adjusting amount of the third throttling part.

In some embodiments, the control unit controls the opening degree of the first throttle member, the opening degree of the third throttle member, and the on-off state of the electric heating assembly 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, and further includes: after the first time of controlling the opening degree of the first throttling part and the opening degree of the third throttling part respectively, judging the magnitude relation between the air suction superheat degree of the first air suction port and the set third air suction superheat degree and judging the magnitude relation between the air suction superheat degree of the second air suction port and the set fourth air suction superheat degree; and if the suction superheat degree of the first suction port is smaller than the set third suction superheat degree and the suction superheat degree of the second suction port is smaller than the set fourth suction superheat degree, starting the electric heating assembly.

In some embodiments, the control unit further comprises: after the condensation preventing function is started, judging the operation state of the compressor, the relation between the suction superheat degree of the first suction port and the set fifth suction superheat degree and the relation between the suction superheat degree of the second suction port and the set fifth suction superheat degree; and if the operation state of the compressor is stop operation or any one of the suction superheat degree of the first suction port and the suction superheat degree of the second suction port is smaller than a set fifth suction superheat degree, closing the anti-condensation function.

In accordance with another aspect of the present invention, there is provided an air conditioning system comprising: the control device of the air conditioning system is described above.

In accordance with the above method, a further aspect of the present invention provides a storage medium, where the storage medium includes a stored program, and when the program runs, the device where the storage medium is controlled to execute the control method of the air conditioning system described above.

According to the scheme, when the dual-temperature air conditioning system is operated in a refrigeration mode or a dehumidification mode, whether the condensation preventing function is started or not is determined according to the tube temperature of the first evaporator, the tube temperature of the second evaporator, the air suction temperature of the first air suction port, the air suction temperature of the second air suction port, the tube temperature of the condenser and the exhaust temperature of the exhaust port; after the condensation preventing function is started, the opening degree of the first throttling part at the outlet of the condenser, the opening degree of the third throttling part at the inlet of the second evaporator and the opening and closing state of the electric heating component on the fan blade of the indoor unit are respectively controlled according to the tube temperature of the first evaporator, the tube temperature of the second evaporator, the air suction temperature of the first air suction port and the air suction temperature of the second air suction port. Therefore, through the control of the opening degree of the throttling component and the control of the opening and closing state of the electric heating component, the superheat degree of the low-temperature evaporator is reduced, the problem that wet air is secondarily separated from moisture in the air duct due to high superheat degree, condensation and water blowing occur is solved, and the experience comfort of a user is improved.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

The technical scheme of the invention is further described in detail through the drawings and the embodiments.

Drawings

FIG. 1 is a flow chart of an embodiment of a control method of an air conditioning system according to the present invention;

FIG. 2 is a flow chart of an embodiment of determining to turn on the anti-condensation function in the method of the present invention;

FIG. 3 is a flow chart of an embodiment of the method of determining that an air conditioning system is in a steady state according to the present invention;

FIG. 4 is a flow chart of an embodiment of controlling the opening of a throttle member in the method of the present invention;

FIG. 5 is a schematic diagram illustrating a control device of an air conditioning system according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of an embodiment of a system architecture of an air conditioning system according to the present invention;

FIG. 7 is a schematic view of another embodiment of a system configuration of an air conditioning system according to the present invention;

FIG. 8 is a flow chart of an embodiment of a method for controlling anti-condensation of an air conditioning system according to the present invention;

fig. 9 is a schematic structural diagram of an indoor unit of an air conditioning system according to an embodiment of the present invention.

In the embodiment of the present invention, reference numerals are as follows, in combination with the accompanying drawings:

102-an acquisition unit; 104-a control unit.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to specific embodiments of the present invention and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

According to an embodiment of the present invention, there is provided a control method of an air conditioning system including: an outdoor unit and an indoor unit; the outdoor unit includes: a three-cylinder compressor, a condenser, a flash vessel, a first throttling element and a second throttling element; the three-cylinder compressor is provided with a first air suction port, a second air suction port, a third air suction port and an exhaust port; the exhaust port is connected with the condenser, the first throttling part, the flash evaporator and the second throttling part in sequence; the flash device is also connected with the third air suction port; the indoor unit includes: a first evaporator, a second evaporator and an electrical heating assembly; the electric heating component is arranged at the fan blade of the indoor unit; after the electric heating component is started, the second evaporator can be heated; a third throttling part is arranged at the inlet of the second evaporator; the first evaporator is connected with the first air suction port; the second evaporator is connected with the second air suction port.

Specifically, the structure of the air conditioning system is shown in fig. 6, and the air conditioning system is a single-cooled air conditioning system. On the indoor side, a valve C (third throttling part) is provided, which divides the evaporator of the indoor unit into a high temperature evaporator (first evaporator) and a low temperature evaporator (second evaporator). In addition, as shown in fig. 9, an electric heating component is further arranged on the fan blade of the indoor unit fan, and the electric heating component is located closer to the low-temperature evaporator and is used for heating air at the low-temperature evaporator. The outdoor unit has three cylinders of compressors, one first air sucking port connected to the high temperature evaporator, one second air sucking port connected to the low temperature evaporator and one third air sucking port connected to the flash evaporator. The outdoor unit is also provided with a condenser, a valve A (a first throttling part), a flash evaporator and a valve B (a second throttling part) which are sequentially connected with the outlet of the compressor unit. When the air conditioning system is in operation, the refrigerant flows into the indoor unit from the valve B, and respectively enters the high-temperature evaporator and the low-temperature evaporator for heat exchange.

Optionally, a four-way valve can be added on the system structure shown in fig. 6, so that the air conditioning system has a heating function. As shown in fig. 7, a four-way valve 1 and a four-way valve 2 are additionally arranged on the outdoor unit side, the four-way valve 1 and the four-way valve 2 are respectively connected with an outlet of a compressor unit and a condenser, meanwhile, the four-way valve 1 is also connected with a low-temperature evaporator and a second air suction port, and the four-way valve 2 is also connected with a high-temperature evaporator and a first air suction port. By changing the direction of the four-way valve 1 and the four-way valve 2, the air conditioning system can be operated in a heating mode. The air conditioning system can be applied to air conditioners in the forms of wall mounted machines, cabinet machines, multi-split machines and the like.

The air conditioning system has a condensation preventing function and is used for preventing condensation inside the indoor unit.

Because the air conditioning system adopts the valve C to divide the evaporator into the high-temperature evaporator and the low-temperature evaporator, a temperature difference exists between the two evaporators, so that the low-temperature evaporator is easy to generate more condensation water or generate a water blowing phenomenon, and the low-temperature evaporator needs to be prevented from generating condensation water and blowing water.

A schematic flow chart of an embodiment of the method of the present invention is shown in fig. 1. The control method of the air conditioning system may include: step S110 to step S130.

At step S110, when the air conditioning system is operated in a cooling mode or a dehumidifying mode, a tube temperature of the first evaporator, a tube temperature of the second evaporator, an intake temperature of the first intake port, an intake temperature of the second intake port, a tube temperature of the condenser, and an exhaust temperature of the exhaust port are obtained.

Since the air conditioning system collects dew at the evaporator in the cooling mode or the dehumidifying mode, it is necessary to perform the anti-dew process in the cooling mode or the dehumidifying mode. Specifically, after the air conditioner is operated in a cooling mode or a dehumidifying mode for a period of time, condensation water begins to gather at the evaporator, and the temperature of each place is obtained through the temperature sensing bag. And, temperature data is acquired once at intervals, and a subsequent control method is performed to continuously prevent the evaporator from condensation and blowing water.

At step S120, it is determined whether to turn on the condensation preventing function according to 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 discharge temperature of the discharge port.

Through the acquired temperature data, the anti-condensation function is started when the possibility of generating condensation water or easy water blowing is predicted, so that accurate anti-condensation and anti-water blowing control is realized.

In some embodiments, in step S120, a specific process of determining whether to turn on the condensation preventing function according to 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 discharge temperature of the discharge port, as shown in fig. 2, includes: step S210 to step S240.

Step S210, determining whether the air conditioning system is in a stable state according to the pipe temperature of the condenser and the exhaust temperature of the exhaust port.

In some embodiments, in step S210, a specific process of determining whether the air conditioning system is in a stable state according to the tube temperature of the condenser and the exhaust temperature of the exhaust port, as shown in fig. 3, includes: step S310 to step S330.

And step S310, determining the superheat degree of the exhaust gas of the compressor according to the pipe temperature of the condenser and the exhaust temperature of the exhaust port.

Specifically, the discharge superheat Δt of the compressor _{Exhaust gas} Exhaust temperature T of exhaust port _{Exhaust gas} Condenser tube temperature T _{Outer tube} 。

Step S320, determining a relationship between the degree of superheat of the exhaust gas of the compressor and the set degree of superheat of the first exhaust gas.

Step S330, if the exhaust superheat degree of the compressor is greater than or equal to the set first exhaust superheat degree, determining that the air conditioning system is in a stable state.

In the running process of the air conditioning system, if the exhaust superheat degree is too low, the running stability and reliability of the air conditioning system are affected, and when the anti-condensation function is executed, the exhaust superheat degree is affected to a certain extent, so that in order to avoid the unstable condition of the air conditioning system when the anti-condensation function is executed, whether the anti-condensation function is executed is determined only after the air conditioning system is judged to be in a stable state according to the exhaust superheat degree, and the stable running of the air conditioning system is ensured.

Step S220, after the air conditioning system is determined to be in a stable state, determining the suction superheat degree of the first suction port according to the tube temperature of the first evaporator and the suction temperature of the first suction port; and determining the suction superheat degree of the second suction port according to the tube temperature of the second evaporator and the suction temperature of the second suction port.

Specifically, the suction superheat Δt of the first suction port _{High suction} Suction temperature T of the first suction port _{High temperature air suction} Tube temperature T of the first evaporator _{High-temperature inner pipe} The suction superheat delta T of the second suction port _{Low suction} Suction temperature T of the second suction port _{Low temperature suction} Tube temperature T of the second evaporator _{Low Wen Naguan} 。

Step S230, determining a magnitude relation between the suction superheat degree of the first suction port and the set first suction superheat degree, and determining a magnitude relation between the suction superheat degree of the second suction port and the set second suction superheat degree.

Step S240, if the suction superheat degree of the first suction port is greater than or equal to the set first suction superheat degree, or the suction superheat degree of the second suction port is greater than or equal to the set second suction superheat degree, it is determined to turn on the anti-condensation function.

If condensation water is generated at the evaporator, the indoor unit can blow water, and the heat exchange efficiency of the first evaporator and the second evaporator can be affected.

At step S130, after the condensation preventing function is turned on, the opening degree of the first throttle member, the opening degree of the third throttle member, 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.

According to the scheme, the suction and exhaust superheat degree of the compressor is determined according to the acquired temperature data, and whether the condensation preventing function is started or not is further determined; after the condensation prevention function is started, the temperature difference between the first evaporator and the second evaporator is eliminated through the control of the opening degree of the valve and the control of the opening and closing of the electric heating assembly, so that condensation and water blowing phenomena caused by overlarge temperature difference are avoided, the high system energy efficiency of the double-temperature air conditioning system is ensured, and meanwhile, the experience comfort of a user is ensured.

In some embodiments, in step S130, 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, specific processes of controlling the opening degree of the first throttling part, the opening degree of the third throttling part, and the on-off state of the electric heating assembly, respectively, are as shown in fig. 4, including: step S410 to step S430.

Step S410, determining the suction superheat degree of the first suction port according to the tube temperature of the first evaporator and the suction temperature of the first suction port; and determining the suction superheat degree of the second suction port according to the tube temperature of the second evaporator and the suction temperature of the second suction port.

Step S420, determining the opening degree adjustment amount of the first throttling component according to the interval range of the suction superheat degree of the first suction port; and determining the opening degree adjustment amount of the third throttling component according to the interval range of the suction superheat degree of the second suction port.

In this embodiment, the valve B (second throttle member) is always in the state of the maximum opening degree. The control valve A can control the total flow of the refrigerant in the whole flow path of the air conditioning system, and the valve C can control the flow of the refrigerant in the low-temperature evaporator, so that the suction superheat degree of the first suction port and the second suction port can be adjusted by adjusting the opening degree of the valve A and the opening degree of the valve C.

For the valve a (first throttle member) and the valve C (third throttle member), it is necessary to set different correspondence between the intake superheat degree and the opening degree adjustment amount. Specifically, for valve A, if T _A1 ＜ΔT _{High suction} The opening adjustment amount of the valve A is +A1; if T _A2 ＜ΔT _{High suction} ≤T _A1 The opening degree of the valve AThe adjustment amount is +A2; if T _A3 ＜ΔT _{High suction} ≤T _A2 The opening adjustment amount of the valve A is +A3; if T _A4 ＜ΔT _{High suction} ≤T _A3 The opening adjustment amount of the valve A is 0, namely the opening of the valve A is not adjusted; if T _A5 ＜ΔT _{High suction} ≤T _A4 The opening adjustment amount of the valve A is-A4; if DeltaT _{High suction} ≤T _A5 The opening adjustment amount of the valve a is-A5. Wherein A1 > A2 > A3 and A5 > A4. For valve C, if T _C1 ＜ΔT _{Low suction} The opening adjustment amount of the valve C is +C1; if T _C2 ＜ΔT _{Low suction} ≤T _C1 The opening adjustment amount of the valve C is +C2; if T _C3 ＜ΔT _{Low suction} ≤T _C2 The opening adjustment amount of the valve C is +C3; if T _C4 ＜ΔT _{Low suction} ≤T _C3 The opening adjustment amount of the valve C is 0, namely the opening of the valve C is not adjusted; if T _C5 ＜ΔT _{Low suction} ≤T _C4 The opening adjustment amount of the valve C is-C4; if DeltaT _{Low suction} ≤T _C5 The opening adjustment amount of the valve C is-C5. Wherein, C1 > C2 > C3 and C5 > C4.

Step S430, controlling the opening degree of the first throttling component according to the opening degree adjusting quantity of the first throttling component; and controlling the opening degree of the third throttling part according to the opening degree adjusting amount of the third throttling part.

For the valve A, when the opening adjustment quantity of the valve A is +A1, increasing A1 on the basis of the current opening of the valve A; when the opening adjustment amount of the valve A is +A2, increasing A2 on the basis of the current opening of the valve A; when the opening adjustment amount of the valve A is +A3, increasing A3 on the basis of the current opening of the valve A; when the opening adjustment amount of the valve A is-A4, reducing A4 on the basis of the current opening of the valve A; when the opening adjustment amount of the valve A is-A5, A5 is reduced on the basis of the current opening of the valve A. For the valve C, when the opening adjustment quantity of the valve C is +C1, increasing C1 on the basis of the current opening of the valve C; when the opening adjustment amount of the valve C is +C2, increasing C2 on the basis of the current opening of the valve C; when the opening adjustment amount of the valve C is +C3, increasing C3 on the basis of the current opening of the valve C; when the opening adjustment amount of the valve C is-C4, reducing C4 on the basis of the current opening of the valve C; when the opening adjustment amount of the valve C is-C5, the valve C is reduced by C5 on the basis of the current opening of the valve C.

When the suction superheat degree of the first suction port and the superheat degree of the second suction port are both high, the refrigerant flow in the system is smaller, so that the opening degree of the valve A needs to be increased, and the refrigerant flow in the system is increased.

When the opening of the valve C is increased, the throttling and cooling degree of the valve C on the refrigerant is reduced, so that the temperature of the refrigerant flowing into the high-temperature evaporator is similar to that of the refrigerant flowing into the low-temperature evaporator, the evaporation temperature difference between the two evaporators is reduced, and therefore condensation water cannot be generated again due to the temperature difference. Correspondingly, if the suction superheat degree of the compressor is lower, the condition that no condensed water exists at the moment or the condensed water does not influence the operation of the system is indicated, and the opening degree of the valve C can be properly reduced at the moment to form a double-temperature evaporator so as to improve the energy efficiency of the system.

In some embodiments, in step S130, the specific process of controlling the opening degree of the first throttling part, the opening degree of the third throttling part, and the on-off state of the electric heating assembly 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, further includes: step S510 and step S520.

Step S510, after the first time of controlling the opening degree of the first throttle member and the opening degree of the third throttle member, of determining a magnitude relation between the suction superheat degree of the first suction port and the set third suction superheat degree, and determining a magnitude relation between the suction superheat degree of the second suction port and the set fourth suction superheat degree.

In step S520, if the suction superheat degree of the first suction port is smaller than the set third suction superheat degree, and the suction superheat degree of the second suction port is smaller than the set fourth suction superheat degree, the electric heating assembly is turned on.

If the opening degree of the first throttling part and the opening degree of the third throttling part are regulated, and the excessively high suction superheat degree of the compressor caused by the existence of the condensation water cannot be prevented, an electric heating component arranged on the fan blade of the indoor unit is started, and the electric heating component can be an electric heating wire, a resistance wire, an electric heating sheet and the like. After the electric heating component is started, the temperature difference between the two evaporators is further eliminated, condensation is prevented from occurring, and meanwhile, the evaporation of condensation water is promoted to a certain extent.

Optionally, when the opening degree of the first throttling component and the opening degree of the third throttling component are adjusted to be the maximum opening degree, or the overheat degree of the air suction of the compressor is too high due to the existence of condensation water, the electric heating component arranged on the fan blade of the indoor unit is started.

Alternatively, when the suction superheat of the compressor due to the presence of the condensate water is too high, the electric heating assembly may not be turned on, but the operation frequency of the compressor may be reduced, thereby reducing the suction superheat, in the case where the opening degree of the first throttle member and the opening degree of the third throttle member have been adjusted to the maximum opening degree.

Optionally, when the opening degree of the first throttling part and the opening degree of the third throttling part are adjusted to be the maximum opening degree, or when the air suction superheat degree of the compressor is too high due to the existence of condensation water, the electric heating assembly arranged on the fan blade of the indoor unit is started, and after a period of time, the judgment is performed again, and if the air suction superheat degree of the first air suction port is smaller than the set third air suction superheat degree, and the air suction superheat degree of the second air suction port is smaller than the set fourth air suction superheat degree, the operation frequency of the compressor is reduced.

According to the scheme, whether the condensation prevention function is executed is determined through the suction and exhaust superheat degree in the dual-temperature air conditioning system, so that the temperature difference between the two evaporators is reduced by controlling the throttling component and the electric heating component on the premise of ensuring the stable and reliable operation of the air conditioning system, condensation caused by the temperature difference is prevented, the phenomenon of water blowing is avoided, and meanwhile, the stability of the compressor in the condensation prevention process is determined.

In some embodiments, the control method of the air conditioning system further includes a process of closing the condensation preventing function, and specifically includes: step S610 and step S620.

Step S610, after the condensation preventing function is turned on, determines an operation state of the compressor, a relationship between a suction superheat degree of the first suction port and a set fifth suction superheat degree, and a relationship between a suction superheat degree of the second suction port and a set fifth suction superheat degree.

In step S620, if the operation state of the compressor is a shutdown operation, or if any one of the suction superheat degree of the first suction port and the suction superheat degree of the second suction port is smaller than a set fifth suction superheat degree, the condensation preventing function is turned off.

When the suction superheat degree of any one of the first suction port and the second suction port is smaller than the set fifth suction superheat degree, the condensation water is effectively treated at the moment, and the condensation water does not exist at the evaporator currently, so that the condensation prevention function is exited, and the air conditioning system is operated in a normal refrigeration mode or a dehumidification mode.

Fig. 8 is a schematic flow chart of an embodiment of a condensation prevention control method of an air conditioning system according to the present invention, as shown in fig. 8, the condensation prevention control method of the present invention includes:

Step 1, after the dual temperature air conditioning system is operated for t1 time in the cooling mode or the dehumidifying mode, step 2 is executed.

And 2, collecting data of each temperature sensing bulb according to a t2 period, specifically, the tube temperature of the first evaporator, the tube temperature of the second evaporator, the air suction temperature of the first air suction port, the air suction temperature of the second air suction port, the tube temperature of the condenser and the exhaust temperature of the exhaust port. And calculates the exhaust superheat delta T of the compressor according to the collected temperature data _{Exhaust gas} Suction superheat deltat of first suction port _{High suction} And the suction superheat delta T of the second suction port _{Low suction} 。

Step 3, determining DeltaT _{Exhaust gas} And a set value T _{Condensation heat 1} If DeltaT _{Exhaust gas} ＜T _{Condensation heat 1} The system is controlled to operate in accordance with a general heating mode or a dehumidifying mode. If DeltaT _{Exhaust gas} ≥T _{Condensation heat 1} Determining DeltaT _{High suction} And a set value T _{Condensation is passed throughHeat 2} Magnitude relation of (d), and Δt _{Low suction} And a set value T _{Condensation heat 3} Is a size relationship of (a). If DeltaT _{High suction} ≥T _{Condensation heat 2} Or DeltaT _{Low suction} ≥T _{Condensation heat 3} And executing the step 3, otherwise, controlling the system to operate according to a common heating mode or a dehumidifying mode.

Step 4, entering anti-condensation control, and according to delta T _{High suction} The opening of the valve A is regulated in the range interval according to the delta T _{Low suction} The opening of the valve C is regulated in the range interval, and after a period of time, the delta T is judged _{High suction} And DeltaT _{Low suction} Whether any one of them reaches the target value. If DeltaT _{High suction} And DeltaT _{Low suction} If the target value is not reached, starting an electric heating device on the fan blade of the indoor unit, and then executing the step 4; if DeltaT _{High suction} And DeltaT _{Low suction} If any one of the target values is reached, step 4 is executed.

Step 5, judging whether the compressor stops running, if so, exiting the anti-condensation control, and controlling the system to run according to a common heating mode or a dehumidifying mode; if the compressor is not stopped, step 5 is executed.

Step 6, determining DeltaT _{High suction} And a set value T _{Condensation heat 4} Magnitude relation, deltaT of (A) _{Low suction} And a set value T _{Condensation heat 5} If DeltaT _{High suction} ≥T _{Condensation heat 4} Or DeltaT _{Low suction} ≥T _{Condensation heat 5} The anti-condensation control is exited, and the system is controlled to operate according to a common heating mode or a dehumidifying mode; otherwise, judging whether the air conditioning system is shut down, if the air conditioning system is shut down, ending the operation, and if the air conditioning system is not shut down, returning to the step 2 to execute again.

By adopting the technical scheme of the embodiment, when the dual-temperature air conditioning system operates in a refrigeration mode or a dehumidification mode, whether the condensation preventing function is started or not is determined according to the tube temperature of the first evaporator, the tube temperature of the second evaporator, the air suction temperature of the first air suction port, the air suction temperature of the second air suction port, the tube temperature of the condenser and the air discharge temperature of the air discharge port; after the condensation preventing function is started, the opening degree of the first throttling part at the outlet of the condenser, the opening degree of the third throttling part at the inlet of the second evaporator and the opening and closing state of the electric heating component on the fan blade of the indoor unit are respectively controlled according to the tube temperature of the first evaporator, the tube temperature of the second evaporator, the air suction temperature of the first air suction port and the air suction temperature of the second air suction port. Therefore, through the control of the opening degree of the throttling component and the control of the opening and closing state of the electric heating component, the superheat degree of the low-temperature evaporator is reduced, the problem that wet air is secondarily separated from moisture in the air duct due to high superheat degree, condensation and water blowing occur is solved, and the experience comfort of a user is improved.

According to an embodiment of the present invention, there is also provided a control apparatus of an air conditioning system corresponding to the control method of the air conditioning system. The air conditioning system includes: an outdoor unit and an indoor unit; the outdoor unit includes: a three-cylinder compressor, a condenser, a flash vessel, a first throttling element and a second throttling element; the three-cylinder compressor is provided with a first air suction port, a second air suction port, a third air suction port and an exhaust port; the exhaust port is connected with the condenser, the first throttling part, the flash evaporator and the second throttling part in sequence; the flash device is also connected with the third air suction port; the indoor unit includes: a first evaporator, a second evaporator and an electrical heating assembly; the electric heating component is arranged at the fan blade of the indoor unit; after the electric heating component is started, the second evaporator can be heated; a third throttling part is arranged at the inlet of the second evaporator; the first evaporator is connected with the first air suction port; the second evaporator is connected with the second air suction port.

Referring to fig. 5, a schematic diagram of an embodiment of the apparatus of the present invention is shown. The control device of the air conditioning system may include: an acquisition unit 102 and a control unit 104.

An acquisition unit 102 configured to acquire a tube temperature of the first evaporator, a tube temperature of the second evaporator, an intake temperature of the first intake port, an intake temperature of the second intake port, a tube temperature of the condenser, and an exhaust temperature of the exhaust port when the air conditioning system is operated in a cooling mode or a dehumidifying mode. The specific function and process of the acquisition unit 102 refer to step S110.

A control unit 104 configured to determine whether to turn on the condensation preventing function according to a tube temperature of the first evaporator, a tube temperature of the second evaporator, a suction temperature of the first suction port, a suction temperature of the second suction port, a tube temperature of the condenser, and an exhaust temperature of the exhaust port. The specific function and process of the control unit 104 refer to step S120.

In some embodiments, the control unit 104 determines whether to turn on the condensation preventing function according to a tube temperature of the first evaporator, a tube temperature of the second evaporator, an intake air temperature of the first intake port, an intake air temperature of the second intake port, a tube temperature of the condenser, and an exhaust air temperature of the exhaust port, including:

the control unit 104 is in particular further configured to determine whether the air conditioning system is in a steady state based on the tube temperature of the condenser and the exhaust temperature of the exhaust port. The specific function and process of the control unit 104 refer to step S210.

In some embodiments, the control unit 104 determines whether the air conditioning system is in a steady state according to a tube temperature of the condenser and an exhaust temperature of the exhaust port, including:

the control unit 104 is specifically further configured to determine a discharge superheat degree of the compressor according to a tube temperature of the condenser and a discharge temperature of the discharge port. The specific function and process of the control unit 104 refer to step S310.

The control unit 104 is specifically further configured to determine a magnitude relation between the discharge superheat degree of the compressor and the set first discharge superheat degree. The specific function and process of the control unit 104 refer to step S320.

The control unit 104 is specifically further configured to determine that the air conditioning system is in a stable state if the discharge superheat degree of the compressor is greater than or equal to the set first discharge superheat degree. The specific function and process of the control unit 104 refer to step S330.

The control unit 104 is specifically further configured to determine, after determining that the air conditioning system is in a stable state, a suction superheat degree of the first suction port according to a tube temperature of the first evaporator and a suction temperature of the first suction port; and determining the suction superheat degree of the second suction port according to the tube temperature of the second evaporator and the suction temperature of the second suction port. The specific function and process of the control unit 104 refer to step S220.

The control unit 104 is specifically further configured to determine a magnitude relation between the suction superheat degree of the first suction port and the set first suction superheat degree, and determine a magnitude relation between the suction superheat degree of the second suction port and the set second suction superheat degree. The specific function and process of the control unit 104 refer to step S230.

The control unit 104 is specifically further configured to determine to turn on the condensation preventing function if the suction superheat degree of the first suction port is greater than or equal to the set first suction superheat degree, or the suction superheat degree of the second suction port is greater than or equal to the set second suction superheat degree. The specific function and process of the control unit 104 refer to step S240.

The control unit 104 is further configured to control the opening degree of the first throttle member, the opening degree of the third throttle member, and the on-off state of the electric heating assembly, respectively, 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 after the condensation preventing function is turned on. The specific function and process of the control unit 104 refer to step S130.

In some embodiments, the control unit 104 controls the opening degree of the first throttling part, the opening degree of the third throttling part, and the on-off state of the electric heating assembly 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, including:

The control unit 104 is specifically further configured to determine a suction superheat degree of the first suction port according to a tube temperature of the first evaporator and a suction temperature of the first suction port; and determining the suction superheat degree of the second suction port according to the tube temperature of the second evaporator and the suction temperature of the second suction port. The specific function and process of the control unit 104 refer to step S410.

The control unit 104 is specifically further configured to determine an opening adjustment amount of the first throttle member according to a section range in which the suction superheat degree of the first suction port is located; and determining the opening degree adjustment amount of the third throttling component according to the interval range of the suction superheat degree of the second suction port. The specific function and process of the control unit 104 refer to step S420.

For the valve a (first throttle member) and the valve C (third throttle member), it is necessary to set different correspondence between the intake superheat degree and the opening degree adjustment amount. Specifically, for valve A, if T _A1 ＜ΔT _{High suction} The opening adjustment amount of the valve A is +A1; if T _A2 ＜ΔT _{High suction} ≤T _A1 The opening adjustment amount of the valve A is +A2; if T _A3 ＜ΔT _{High suction} ≤T _A2 The opening adjustment amount of the valve A is +A3; if T _A4 ＜ΔT _{High suction} ≤T _A3 The opening adjustment amount of the valve A is 0, namely the opening of the valve A is not adjusted; if T _A5 ＜ΔT _{High suction} ≤T _A4 The opening adjustment amount of the valve A is-A4; if DeltaT _{High suction} ≤T _A5 The opening adjustment amount of the valve a is-A5. Wherein A1 > A2 > A3 and A5 > A4. For valve C, if T _C1 ＜ΔT _{Low suction} The opening adjustment amount of the valve C is +C1; if T _C2 ＜ΔT _{Low suction} ≤T _C1 The opening adjustment amount of the valve C is +C2; if T _C3 ＜ΔT _{Low suction} ≤T _C2 The opening adjustment amount of the valve C is +C3; if T _C4 ＜ΔT _{Low suction} ≤T _C3 The opening adjustment amount of the valve C is 0, namely the opening of the valve C is not adjusted; if T _C5 ＜ΔT _{Low suction} ≤T _C4 The opening adjustment amount of the valve C is-C4; if DeltaT _{Low suction} ≤T _C5 The opening adjustment amount of the valve C is-C5. Wherein, C1 > C2 > C3 and C5 > C4.

The control unit 104 is specifically further configured to control the opening degree of the first throttle member according to the opening degree adjustment amount of the first throttle member; and controlling the opening degree of the third throttling part according to the opening degree adjusting amount of the third throttling part. The specific function and process of the control unit 104 refer to step S430.

In some embodiments, the control unit 104 controls the opening degree of the first throttling part, the opening degree of the third throttling part, and the on-off state of the electric heating assembly 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, and further includes:

the control unit 104 is specifically further configured to determine a magnitude relation between the suction superheat degree of the first suction port and the set third suction superheat degree, and determine a magnitude relation between the suction superheat degree of the second suction port and the set fourth suction superheat degree after the first time for controlling the opening degree of the first throttle member and the opening degree of the third throttle member, respectively. The specific function and process of the control unit 104 refer to step S510.

The control unit 104 is specifically further configured to turn on the electric heating assembly if the suction superheat degree of the first suction port is smaller than the set third suction superheat degree, and the suction superheat degree of the second suction port is smaller than the set fourth suction superheat degree. The specific function and process of the control unit 104 refer to step S520.

In some embodiments, the control unit 104 further comprises:

the control unit 104 is specifically further configured to determine an operation state of the compressor, a relationship between the suction superheat degree of the first suction port and the set fifth suction superheat degree, and a relationship between the suction superheat degree of the second suction port and the set fifth suction superheat degree after the condensation preventing function is turned on. The specific function and process of the control unit 104 refer to step S610.

The control unit 104 is specifically further configured to turn off the condensation preventing function if the operation state of the compressor is a shutdown operation, or if any one of the suction superheat degree of the first suction port and the suction superheat degree of the second suction port is smaller than a set fifth suction superheat degree. The specific function and process of the control unit 104 refer to step S620.

And 2, collecting data of each temperature sensing bulb according to a t2 period, specifically, the tube temperature of the first evaporator, the tube temperature of the second evaporator, the air suction temperature of the first air suction port, the air suction temperature of the second air suction port, the tube temperature of the condenser and the exhaust temperature of the exhaust port. And calculates the exhaust superheat delta T of the compressor according to the collected temperature data _{Exhaust gas} Suction superheat deltat of first suction port _{High suction} And the suction superheat delta T of the second suction port _{Low and low} Sucking.

Step 3, determining DeltaT _{Exhaust gas} And a set value T _{Condensation heat 1} If DeltaT _{Exhaust gas} ＜T _{Condensation heat 1} The system is controlled to operate in accordance with a general heating mode or a dehumidifying mode. If DeltaT _{Exhaust gas} ≥T _{Condensation heat 1} Determining DeltaT _{High suction} And a set value T _{Condensation heat 2} Magnitude relation of (d), and Δt _{Low suction} And a set value T _{Condensation heat 3} Is a size relationship of (a). If DeltaT _{High suction} ≥T _{Condensation heat 2} Or DeltaT _{Low suction} ≥T _{Condensation heat 3} And executing the step 3, otherwise, controlling the system to operate according to a common heating mode or a dehumidifying mode.

Since the processes and functions implemented by the apparatus of the present embodiment substantially correspond to the embodiments, principles and examples of the foregoing methods, the descriptions of the embodiments are not exhaustive, and reference may be made to the descriptions of the foregoing embodiments and their descriptions are omitted herein.

By adopting the technical scheme of the invention, when the dual-temperature air conditioning system operates in a refrigeration mode or a dehumidification mode, whether to start the condensation preventing function is determined according to the tube temperature of the first evaporator, the tube temperature of the second evaporator, the air suction temperature of the first air suction port, the air suction temperature of the second air suction port, the tube temperature of the condenser and the exhaust temperature of the exhaust port; after the condensation preventing function is started, the opening degree of the first throttling part at the outlet of the condenser, the opening degree of the third throttling part at the inlet of the second evaporator and the opening and closing state of the electric heating component on the fan blade of the indoor unit are respectively controlled according to the tube temperature of the first evaporator, the tube temperature of the second evaporator, the air suction temperature of the first air suction port and the air suction temperature of the second air suction port. Therefore, through the control of the opening degree of the throttling component and the control of the opening and closing state of the electric heating component, the superheat degree of the low-temperature evaporator is reduced, the problem that wet air is secondarily separated from moisture in the air duct due to high superheat degree, condensation and water blowing occur is solved, and the experience comfort of a user is improved.

According to an embodiment of the present invention, there is also provided an air conditioning system corresponding to a control device of the air conditioning system. The air conditioning system may include: the control device of the air conditioning system is described above.

Since the processing and functions implemented by the air conditioning system of the present embodiment basically correspond to the embodiments, principles and examples of the foregoing apparatus, the description of the present embodiment is not exhaustive, and reference may be made to the related descriptions of the foregoing embodiments, which are not repeated herein.

According to an embodiment of the present invention, there is also provided a storage medium corresponding to a control method of an air conditioning system, the storage medium including a stored program, wherein an apparatus in which the storage medium is controlled to execute the control method of the air conditioning system described above when the program runs.

Since the processes and functions implemented by the storage medium of the present embodiment substantially correspond to the embodiments, principles and examples of the foregoing methods, the descriptions of the present embodiment are not exhaustive, and reference may be made to the related descriptions of the foregoing embodiments, which are not repeated herein.

In summary, it is readily understood by those skilled in the art that the above-described advantageous ways can be freely combined and superimposed without conflict.

The above description is only an example of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A control method of an air conditioning system, the air conditioning system comprising: an outdoor unit and an indoor unit; the outdoor unit includes: a three-cylinder compressor, a condenser, a flash vessel, a first throttling element and a second throttling element; the three-cylinder compressor is provided with a first air suction port, a second air suction port, a third air suction port and an exhaust port; the exhaust port is connected with the condenser, the first throttling part, the flash evaporator and the second throttling part in sequence; the flash device is also connected with the third air suction port; the indoor unit includes: a first evaporator, a second evaporator and an electrical heating assembly; the electric heating component is arranged at the fan blade of the indoor unit; after the electric heating component is started, the second evaporator can be heated; a third throttling part is arranged at the inlet of the second evaporator; the first evaporator is connected with the first air suction port; the second evaporator is connected with the second air suction port; the air conditioning system has a condensation preventing function and is used for preventing condensation inside the indoor unit; the method comprises the following steps:

When the air conditioning system operates in a refrigeration mode or a dehumidification mode, acquiring 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;

determining whether to turn on the anti-condensation function according to 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 condensation preventing function is started, the opening degree of the first throttling part, the opening degree of the third throttling part and the opening and closing state of the electric heating assembly are respectively controlled according to the tube temperature of the first evaporator, the tube temperature of the second evaporator, the air suction temperature of the first air suction port and the air suction temperature of the second air suction port.

2. The control method of an air conditioning system according to claim 1, wherein determining whether to turn on the condensation preventing function based on a tube temperature of the first evaporator, a tube temperature of the second evaporator, a suction temperature of the first suction port, a suction temperature of the second suction port, a tube temperature of the condenser, and an exhaust temperature of the exhaust port, comprises:

Determining whether the air conditioning system is in a stable state according to the pipe temperature of the condenser and the exhaust temperature of the exhaust port;

after the air conditioning system is in a stable state, determining the suction superheat degree of the first suction port according to the tube temperature of the first evaporator and the suction temperature of the first suction port; determining the suction superheat degree of the second suction port according to the tube temperature of the second evaporator and the suction temperature of the second suction port;

judging the magnitude relation between the suction superheat degree of the first suction port and the set first suction superheat degree, and judging the magnitude relation between the suction superheat degree of the second suction port and the set second suction superheat degree;

and if the suction superheat degree of the first suction port is greater than or equal to the set first suction superheat degree or the suction superheat degree of the second suction port is greater than or equal to the set second suction superheat degree, determining to start the anti-condensation function.

3. The control method of an air conditioning system according to claim 2, wherein determining whether the air conditioning system is in a steady state based on a tube temperature of the condenser and an exhaust temperature of the exhaust port, comprises:

Determining an exhaust superheat degree of the compressor according to a tube temperature of the condenser and an exhaust temperature of the exhaust port;

judging the relationship between the degree of superheat of the exhaust gas of the compressor and the degree of superheat of the set first degree of superheat of the exhaust gas;

and if the exhaust superheat degree of the compressor is greater than or equal to the set first exhaust superheat degree, determining that the air conditioning system is in a stable state.

4. The control method of an air conditioning system according to claim 1, wherein controlling the opening degree of the first throttle member, the opening degree of the third throttle member, and the on-off state of the electric heating assembly, respectively, 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, comprises:

determining the suction superheat degree of the first suction port according to the tube temperature of the first evaporator and the suction temperature of the first suction port; determining the suction superheat degree of the second suction port according to 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 part according to the interval range of the suction superheat degree of the first suction port; determining the opening degree adjustment amount of the third throttling component according to the interval range of the suction superheat degree of the second suction port;

Controlling the opening degree of the first throttling part according to the opening degree adjusting amount of the first throttling part; and controlling the opening degree of the third throttling part according to the opening degree adjusting amount of the third throttling part.

5. The method according to claim 4, wherein the opening degree of the first throttle member, the opening degree of the third throttle member, and the on-off state of the electric heating unit are controlled 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, and further comprising:

after the first time of controlling the opening degree of the first throttling part and the opening degree of the third throttling part respectively, judging the magnitude relation between the air suction superheat degree of the first air suction port and the set third air suction superheat degree and judging the magnitude relation between the air suction superheat degree of the second air suction port and the set fourth air suction superheat degree;

and if the suction superheat degree of the first suction port is smaller than the set third suction superheat degree and the suction superheat degree of the second suction port is smaller than the set fourth suction superheat degree, starting the electric heating assembly.

6. The control method of an air conditioning system according to any one of claims 1 to 5, further comprising:

after the condensation preventing function is started, judging the operation state of the compressor, the relation between the suction superheat degree of the first suction port and the set fifth suction superheat degree and the relation between the suction superheat degree of the second suction port and the set fifth suction superheat degree;

and if the operation state of the compressor is stop operation or any one of the suction superheat degree of the first suction port and the suction superheat degree of the second suction port is smaller than a set fifth suction superheat degree, closing the anti-condensation function.

7. A control device of an air conditioning system, characterized in that the air conditioning system comprises: an outdoor unit and an indoor unit; the outdoor unit includes: a three-cylinder compressor, a condenser, a flash vessel, a first throttling element and a second throttling element; the three-cylinder compressor is provided with a first air suction port, a second air suction port, a third air suction port and an exhaust port; the exhaust port is connected with the condenser, the first throttling part, the flash evaporator and the second throttling part in sequence; the flash device is also connected with the third air suction port; the indoor unit includes: a first evaporator, a second evaporator and an electrical heating assembly; the electric heating component is arranged at the fan blade of the indoor unit; after the electric heating component is started, the second evaporator can be heated; a third throttling part is arranged at the inlet of the second evaporator; the first evaporator is connected with the first air suction port; the second evaporator is connected with the second air suction port; the air conditioning system has a condensation preventing function and is used for preventing condensation inside the indoor unit; the device comprises:

An acquisition unit configured to acquire a tube temperature of the first evaporator, a tube temperature of the second evaporator, an intake temperature of the first intake port, an intake temperature of the second intake port, a tube temperature of the condenser, and an exhaust temperature of the exhaust port when the air conditioning system is operated in a cooling mode or a dehumidifying mode;

a control unit configured to determine whether to turn on the condensation preventing function according to a tube temperature of the first evaporator, a tube temperature of the second evaporator, a suction temperature of the first suction port, a suction temperature of the second suction port, a tube temperature of the condenser, and an exhaust temperature of the exhaust port;

the control unit is further configured to control the opening degree of the first throttling part, the opening degree of the third throttling part and the opening and closing state of the electric heating assembly according to the tube temperature of the first evaporator, the tube temperature of the second evaporator, the air suction temperature of the first air suction port and the air suction temperature of the second air suction port after the condensation preventing function is started.

8. The control device of claim 7, wherein the control unit determining whether to turn on the anti-condensation function based on a tube temperature of the first evaporator, a tube temperature of the second evaporator, a suction temperature of the first suction port, a suction temperature of the second suction port, a tube temperature of the condenser, and an exhaust temperature of the exhaust port, comprises:

9. The control device of an air conditioning system according to claim 8, wherein the control unit determining whether the air conditioning system is in a steady state based on a tube temperature of the condenser and an exhaust temperature of the exhaust port, comprises:

10. The control device of an air conditioning system according to claim 7, wherein the control unit controls the opening degree of the first throttle member, the opening degree of the third throttle member, and the on-off state of the electric heating unit, respectively, 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, and includes:

11. The control device of an air conditioning system according to claim 10, wherein the control unit controls the opening degree of the first throttle member, the opening degree of the third throttle member, and the on-off state of the electric heating unit, respectively, 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, and further includes:

12. The control device of an air conditioning system according to any of claims 7 to 11, characterized in that the control unit further comprises:

13. An air conditioning system, comprising: the control device of an air conditioning system according to any one of claims 7 to 12.

14. A storage medium comprising a stored program, wherein the program, when run, controls a device in which the storage medium is located to perform the control method of the air conditioning system according to any one of claims 1 to 6.