CN106440443B - Air conditioning system suitable for high-temperature refrigeration and control method - Google Patents

Air conditioning system suitable for high-temperature refrigeration and control method Download PDF

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Publication number
CN106440443B
CN106440443B CN201611055482.6A CN201611055482A CN106440443B CN 106440443 B CN106440443 B CN 106440443B CN 201611055482 A CN201611055482 A CN 201611055482A CN 106440443 B CN106440443 B CN 106440443B
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control valve
conditioning system
air conditioning
parameter value
cylinder
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CN106440443A (en
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杨晓东
韦汉儒
李杏党
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Midea Group Co Ltd
Guangzhou Hualing Refrigeration Equipment Co Ltd
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Midea Group Co Ltd
Guangzhou Hualing Refrigeration Equipment Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
    • F25B2313/02731—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one three-way valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/029—Control issues

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention relates to the technical field of air conditioners, and discloses an air conditioning system suitable for high-temperature refrigeration, which comprises a refrigerant loop, wherein the refrigerant loop comprises a compressor, a condenser, a throttling device and at least two evaporators which are connected through pipelines, the at least two evaporators are arranged in the pipelines in parallel, and the pressure of the refrigerant loop is reduced by adjusting the capacity of at least one of the evaporators. The invention can reduce the pressure of the air conditioning system and ensure the reliability of the system. The invention also provides a control method.

Description

Air conditioning system suitable for high-temperature refrigeration and control method
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioning system suitable for high-temperature refrigeration and a control method.
Background
In the conventional air conditioning system, the system pressure is often too high during high-temperature refrigeration, and in the related literature, the system pressure is generally reduced by unloading the refrigerant quantity of the outdoor unit or unloading the discharge capacity of the compressor. However, this approach may cause unstable operation and poor reliability of the system.
Disclosure of Invention
Technical problem to be solved
The invention aims to solve the technical problem of how to ensure the reliability of the system while reducing the pressure of an air conditioning system.
(II) technical scheme
In order to solve the above technical problem, the present invention provides an air conditioning system suitable for high temperature refrigeration, which includes a refrigerant circuit, wherein the refrigerant circuit includes a compressor, a condenser, a throttling device and at least two evaporators connected by a pipeline, at least two evaporators are arranged in the pipeline in parallel, and the pressure of the refrigerant circuit is reduced by adjusting the capacity of at least one of the evaporators.
The number of the evaporators is two, and the two evaporators are respectively a first evaporator and a second evaporator; and a first control valve is arranged on an inlet pipeline of the first evaporator and/or a second control valve is arranged on an inlet pipeline of the second evaporator.
Wherein the capacity of the first evaporator is greater than the capacity of the second evaporator.
The compressor is a double-cylinder variable-capacity compressor, and the double-cylinder variable-capacity compressor comprises a main cylinder and an auxiliary cylinder.
The device also comprises a three-way valve, wherein the three-way valve comprises a first inlet, a second inlet and an outlet;
the first inlet is connected with the air suction port of the main cylinder, the outlet is connected with the air suction port of the auxiliary cylinder, and the second inlet is connected with the exhaust port of the double-cylinder variable volume compressor;
when the first inlet is communicated with the air suction port of the main cylinder, the air suction port of the main cylinder and the air suction port of the auxiliary cylinder are both communicated with an air return pipeline, and the double-cylinder variable-capacity compressor adopts a double-cylinder working mode;
when the second inlet is communicated with the exhaust port of the double-cylinder variable-capacity compressor, the air suction port of the main cylinder is communicated with the air return pipeline and is not communicated with the air suction port of the auxiliary cylinder, and the double-cylinder variable-capacity compressor is in a single-cylinder working mode.
Wherein, the compressor is respectively connected with the condenser and the evaporator through reversing valves.
The first control valve and the second control valve can be both one-way valves, electronic expansion valves or electromagnetic valves.
The invention also provides a control method for high-temperature refrigeration of the air conditioning system, when the compressor runs in a single-cylinder working mode and is only provided with the first control valve or the second control valve, the method comprises the following steps:
s11, starting a refrigeration mode of the air conditioning system, and opening the first control valve or the second control valve;
s12, after the air conditioning system runs for a preset time, detecting one of the parameter values representing the running pressure of the air conditioning system, and if the parameter value is less than or equal to a set value, running the air conditioning system according to the current state and continuously detecting the parameter value;
s13, if the parameter value is larger than the set value, closing or closing the first control valve or the second control valve;
s14, continuously detecting the parameter value, and when the parameter value is less than or equal to the set value, the air conditioning system operates according to the current state and continuously detects the parameter value;
when the compressor operates in a single cylinder mode and is provided with a first control valve and a second control valve, the method comprises the following steps:
s21, starting a refrigeration mode of the air conditioning system, opening the first control valve and the second control valve, and running for a preset time;
s22, detecting one of the parameter values representing the operating pressure of the air conditioning system, and if the parameter value is not more than a set value, operating the air conditioning system according to the current state and continuously detecting the parameter value;
s23, if the parameter value is larger than the set value, closing or closing the second control valve, and executing the step S24;
s24, detecting parameter values after running for a preset time, and if the parameter values are less than or equal to a set value, running the air conditioning system according to the current state and continuously detecting the parameter values;
s25, if the parameter value > the set value, execute S26;
s26, opening the second control valve, closing or closing the first control valve, continuously detecting the parameter value after running for a preset time, and when the parameter value is less than or equal to a set value, the air conditioning system runs according to the current state and continuously detects the parameter value;
when the compressor runs a double-cylinder working mode and is only provided with a first control valve or a second control valve, the method comprises the following steps:
s31, starting a refrigeration mode of the air conditioning system, opening a first control valve or a second control valve, and operating a double cylinder of the compressor;
s32, after the air conditioning system runs for a preset time, detecting one of the parameter values representing the running pressure of the air conditioning system, and if the parameter value is less than or equal to a set value, running the air conditioning system according to the current state and continuously detecting the parameter value;
s33, if the parameter value is larger than the set value, closing or closing the first control valve or the second control valve;
s34, after running for a preset time, continuously detecting the parameter value, if the parameter value is not more than the set value, the air conditioning system runs according to the current state and continuously detects the parameter value;
s35, if the first control valve or the second control valve is closed and the parameter value is larger than the set value, executing S36;
s36, closing the auxiliary cylinder of the compressor, continuously detecting the parameter value, and when the parameter value is less than or equal to the set value, the air conditioning system operates according to the current state and continuously detects the parameter value;
when the compressor runs a double-cylinder working mode and is provided with a first control valve and a second control valve, the method comprises the following steps:
s41, starting a refrigeration mode of the air conditioning system, opening both the first control valve and the second control valve, and operating the double cylinders of the compressor;
s42, after the air conditioning system runs for a preset time, detecting one of the parameter values representing the running pressure of the air conditioning system, and if the parameter value is less than or equal to a set value, running the air conditioning system according to the current state and continuously detecting the parameter value;
s43, if the parameter value is larger than the set value, closing or closing the second control valve, and executing the step S44;
s44, detecting parameter values after running for a preset time, if the parameter values are less than or equal to the set values, running according to the current state and continuously detecting the parameter values, and if the parameter values are greater than the set values, executing S45;
s45, opening the second control valve, closing or closing the first control valve, detecting a parameter value after running for a preset time, running according to the current state and continuously detecting the parameter value if the parameter value is less than or equal to a set value, and executing S46 if the parameter value is greater than the set value;
and S46, closing the auxiliary cylinder of the compressor, continuously detecting the parameter value, and when the parameter value is less than or equal to the set value, operating the air conditioning system according to the current state and continuously detecting the parameter value.
The parameters representing the operating pressure of the air conditioning system can be the current of the whole air conditioning system, the pressure of the system, the temperature of a coil pipe of a condenser or the exhaust temperature and the like.
Wherein the preset time may be 0-3 minutes.
(III) advantageous effects
Compared with the prior art, the invention has the following advantages:
the invention provides an air conditioning system suitable for high-temperature refrigeration and a control method thereof, wherein the air conditioning system adopts at least two evaporators which are connected in parallel in a pipeline and arranged in the existing refrigerant loop, the pressure of the refrigerant loop is reduced by adjusting the capacity of at least one evaporator, the control method is simple, and the reliability of the refrigeration operation of the air conditioning system under the high-temperature working condition is improved.
Drawings
FIG. 1 is a schematic diagram of a connection relationship of an air conditioning system suitable for high temperature refrigeration according to the present invention;
FIG. 2 is a schematic diagram of a single cylinder operation of a compressor of an air conditioning system suitable for high temperature refrigeration according to the present invention;
FIG. 3 is a schematic view of FIG. 2 without the diverter valve;
FIG. 4 is a schematic view of FIG. 1 without the diverter valve;
FIG. 5 is a flowchart of embodiment 1 of a control method of the present invention;
FIG. 6 is a flowchart of embodiment 2 of a control method of the present invention;
FIG. 7 is a flowchart of embodiment 3 of a control method of the present invention;
FIG. 8 is a flowchart of embodiment 4 of a control method of the present invention;
in the figure: 1: a compressor; 2: a four-way reversing valve; 3: a pressure sensor; 4: a condenser; 41: a coil temperature sensor; 5: a throttling device: 61: a first control valve; 62: a second control valve; 71: a first evaporator; 72: a second evaporator; 8: a three-way valve; 81: a first inlet; 82: a second inlet; 83: an outlet; 9: an air return component; 10: an exhaust gas temperature sensor.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, in the description of the present invention, "a plurality", and "a plurality" mean two or more unless otherwise specified.
As shown in fig. 1 to 4, the present invention provides an air conditioning system suitable for high temperature refrigeration, which includes a refrigerant circuit, wherein the refrigerant circuit includes a compressor 1, a condenser 4, a throttling device 5 and at least two evaporators connected by a pipeline, at least two evaporators are arranged in the pipeline in parallel, and the capacity of at least one of the evaporators is adjusted to reduce the pressure in the refrigerant circuit, so as to increase the reliability of the air conditioning system in the refrigeration operation under high temperature conditions.
Wherein the number of the evaporators may be two, three, four or more, in the embodiment of the present invention, the number of the evaporators is preferably two, that is, the first evaporator 71 and the second evaporator 72; a first control valve 61 is arranged on the inlet pipeline of the first evaporator 71 and/or a second control valve 62 is arranged on the inlet pipeline of the second evaporator 72, and is used for adjusting the flow of the refrigerant flowing through the corresponding evaporator, and further adjusting the load of the whole refrigerant circuit.
In the present invention, the capacity of the first evaporator 71 is set to be larger than the capacity of the second evaporator 72.
The compressor 1 is a double-cylinder variable-capacity compressor, the double-cylinder variable-capacity compressor comprises a main cylinder and an auxiliary cylinder, the main cylinder is communicated with the auxiliary cylinder, and the compressor is switched between working modes of a single cylinder and double cylinders according to specific conditions.
The device further comprises a three-way valve 8, wherein the three-way valve 8 comprises a first inlet 81, a second inlet 82 and an outlet 83, and the first inlet 81 and the second inlet 82 are not communicated simultaneously;
the first inlet 81 is connected with the suction port of the main cylinder, the outlet 83 is connected with the suction port of the auxiliary cylinder, and the second inlet 82 is connected with the exhaust port of the double-cylinder variable displacement compressor;
when the first inlet 81 is communicated with the air suction port of the main cylinder, the air suction port of the main cylinder and the air suction port of the auxiliary cylinder are both communicated with the air return pipeline, at the moment, the main cylinder and the auxiliary cylinder both work, and the double-cylinder variable volume compressor is in a double-cylinder working mode;
when the second inlet 82 is communicated with the exhaust port of the double-cylinder variable-capacity compressor, the suction port of the main cylinder is communicated with the air return pipeline and is not communicated with the suction port of the auxiliary cylinder, a part of refrigerant discharged from the exhaust port can return to the suction port of the auxiliary cylinder through a pipeline to relieve a part of pressure of the system, at the moment, only the main cylinder works, and the double-cylinder variable-capacity compressor is in a single-cylinder working mode.
The compressor 1 is connected with the condenser 4 and the evaporator respectively through a reversing valve, such as a four-way reversing valve 2, and a gas return component 9 is arranged on a refrigerant loop between the four-way reversing valve 2 and a main cylinder suction port of the compressor 1 and used for assisting the gas return of the compressor 1.
The first control valve 61 and the second control valve 62 may be a check valve, an electronic expansion valve, or an electromagnetic valve, but may also be other types of valves.
The invention also provides a control method for high-temperature refrigeration of the air conditioning system; the control method of the present invention is specifically illustrated by the following four examples.
Example 1
When the compressor operates in the single cylinder operation mode and only the first control valve 61 or the second control valve 62 is provided, as shown in fig. 5, it may include the steps of:
s11, starting a cooling mode of the air conditioning system, and opening the first control valve 61 or the second control valve 62;
s12, after the air conditioning system runs for a preset time such as 0-3 minutes, detecting one of the parameter values representing the running pressure of the air conditioning system, such as the current of the whole air conditioning system, the system pressure, the temperature of a coil pipe of a condenser or the exhaust temperature, and the like, if the parameter value is less than or equal to the set value, the air conditioning system runs according to the current state and continuously detects the parameter value;
s13, if the parameter value > is greater than the set value, the first control valve 61 or the second control valve 62
Shut down, or shut down, to reduce the load on the system,
s14, continuously detecting the parameter value, and when the parameter value is less than or equal to the set value, the air conditioning system operates according to the current state and continuously detects the parameter value;
example 2
When the compressor operates in the single cylinder operation mode and the first and second control valves 61 and 62 are provided, as shown in fig. 6, it may include the steps of:
s21, starting a refrigeration mode of the air conditioning system, opening the first control valve 61 and the second control valve 62, and running for a preset time, such as 0-3 minutes;
s22, detecting one of the parameter values representing the operating pressure of the air conditioning system, such as the current of the whole machine, the system pressure, the temperature of a condenser coil or the exhaust temperature, and the like, wherein if the parameter value is less than or equal to a set value, the air conditioning system operates according to the current state and continuously detects the parameter value;
s23, if the parameter value > the set value, the second control valve 62 is closed or closed to reduce the load of the system, and the step S24 is executed;
s24, detecting parameter values after the air conditioner runs for a preset time, such as 0-3 minutes, and if the parameter values are less than or equal to a set value, the air conditioner runs according to the current state and continuously detects the parameter values;
s25, if the parameter value > the set value, execute S26;
s26, opening the second control valve 62, closing or closing the first control valve 61 to further reduce the load of the system, continuously detecting the parameter value after running for a preset time, such as 0-3 minutes, and when the parameter value is less than or equal to the set value, the air conditioning system runs according to the current state and continuously detects the parameter value;
example 3
When the compressor operates in the two-cylinder operation mode and only the first control valve 61 or the second control valve 62 is provided, as shown in fig. 7, it may include the steps of:
s31, starting a refrigeration mode of the air conditioning system, opening the first control valve 61 or the second control valve 62, and operating the double cylinders of the compressor;
s32, after the air conditioning system runs for a preset time such as 0-3 minutes, detecting one of parameter values representing the running pressure of the air conditioning system, such as the current of the whole air conditioning system, the system pressure, the temperature of a coil pipe of a condenser or the exhaust temperature, and the like, if the parameter value is less than or equal to a set value, the air conditioning system runs according to the current state and continuously detects the parameter value;
s33, if the parameter value > the set value, the first control valve 61 or the second control valve 62 is closed or closed to reduce the load of the system;
s34, after the air conditioner runs for a preset time such as 0-3 minutes, continuously detecting the parameter value, and if the parameter value is less than or equal to a set value, the air conditioner runs according to the current state and continuously detects the parameter value;
s35, if the first control valve 61 or the second control valve 62 is closed and the parameter value is larger than the set value, executing S36;
s36, closing the auxiliary cylinder of the compressor, continuously detecting the parameter value, and when the parameter value is less than or equal to the set value, the air conditioning system operates according to the current state and continuously detects the parameter value;
example 4
When the compressor operates in the two-cylinder operation mode and the first and second control valves 61 and 62 are provided, as shown in fig. 8, it may include the steps of:
s41, starting a refrigeration mode of the air conditioning system, opening the first control valve 61 and the second control valve 62, and operating the compressor 1 by double cylinders;
s42, after the air conditioning system runs for a preset time such as 0-3 minutes, detecting one of parameter values representing the running pressure of the air conditioning system, such as the current of the whole air conditioning system, the system pressure, the temperature of a coil pipe of a condenser or the exhaust temperature, and the like, if the parameter value is less than or equal to a set value, the air conditioning system runs according to the current state and continuously detects the parameter value;
s43, if the parameter value > the set value, the second control valve 62 is closed or closed to reduce the load of the system, and the step S44 is executed;
s44, detecting parameter values after running for a preset time such as 0-3 minutes, and if the parameter values are less than or equal to a set value, running according to the current state and continuously detecting the parameter values;
s45, if the parameter value > the set value, execute S46;
s46, opening the second control valve 62, closing or closing the first control valve 61 to further reduce the load of the system, detecting a parameter value after running for a preset time, such as 0-3 minutes, if the parameter value is less than or equal to a set value, running according to the current state and continuously detecting the parameter value, and if the parameter value is greater than the set value, executing S47;
and S47, closing the auxiliary cylinder of the compressor, continuously detecting the parameter value, and when the parameter value is less than or equal to the set value, operating the air conditioning system according to the current state and continuously detecting the parameter value. The pressure and the load of the air conditioning system are reduced by unloading partial capacity of the evaporator, and the reliability and the safety of the air conditioning system in a high-temperature working condition state are improved.
Specifically, as shown in fig. 1, the whole machine current is measured by installing an ammeter (not shown in the figure) in the whole machine circuit, the system pressure is measured by installing a pressure sensor 3, the condenser coil temperature is measured by installing a coil temperature sensor 41 outside the coil of the condenser 4, and the exhaust temperature is measured by installing an exhaust temperature sensor 10 in the exhaust line.
The set value is set in the controller according to different refrigerant types and environment temperatures.
It can be seen from the above embodiments that the present invention reduces the pressure and load of the air conditioning system by unloading a part of the capacity of the evaporator, and increases the reliability and safety of the air conditioning system under high temperature conditions.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (7)

1. An air conditioning system suitable for high-temperature refrigeration is characterized by comprising a refrigerant loop, wherein the refrigerant loop comprises a compressor, a condenser, a throttling device and two evaporators which are connected through pipelines, the two evaporators are arranged in the pipelines in parallel, and the pressure of the refrigerant loop is reduced by adjusting the capacity of at least one of the evaporators; the two evaporators are respectively a first evaporator and a second evaporator; a first control valve is arranged on an inlet pipeline of the first evaporator and/or a second control valve is arranged on an inlet pipeline of the second evaporator; the compressor is a double-cylinder variable-capacity compressor, the double-cylinder variable-capacity compressor comprises a main cylinder, an auxiliary cylinder and a three-way valve, and the three-way valve comprises a first inlet, a second inlet and an outlet;
the first inlet is connected with the air suction port of the main cylinder, the outlet is connected with the air suction port of the auxiliary cylinder, and the second inlet is connected with the exhaust port of the double-cylinder variable volume compressor;
when the first inlet is communicated with the air suction port of the main cylinder, the air suction port of the main cylinder and the air suction port of the auxiliary cylinder are both communicated with an air return pipeline, and the double-cylinder variable-capacity compressor adopts a double-cylinder working mode;
when the second inlet is communicated with the exhaust port of the double-cylinder variable-capacity compressor, the air suction port of the main cylinder is communicated with the air return pipeline and is not communicated with the air suction port of the auxiliary cylinder, and the double-cylinder variable-capacity compressor is in a single-cylinder working mode.
2. An air conditioning system suitable for high temperature refrigeration as claimed in claim 1, wherein the capacity of the first evaporator is greater than the capacity of the second evaporator.
3. An air conditioning system suitable for high temperature refrigeration according to any one of claims 1-2, wherein the compressor is connected to the condenser and the evaporator respectively through a reversing valve.
4. An air conditioning system suitable for high temperature refrigeration according to claim 1,
the first control valve and the second control valve are both one-way valves, electronic expansion valves or electromagnetic valves.
5. A control method of an air conditioning system suitable for high temperature refrigeration according to any one of claims 1 to 4, when the compressor operates in single cylinder operation mode and only the first control valve or the second control valve is provided, comprising the steps of:
s11, starting a refrigeration mode of the air conditioning system, and opening the first control valve or the second control valve;
s12, after the air conditioning system runs for a preset time, detecting one of the parameter values representing the running pressure of the air conditioning system, and if the parameter value is less than or equal to a set value, running the air conditioning system according to the current state and continuously detecting the parameter value;
s13, if the parameter value is larger than the set value, closing or closing the first control valve or the second control valve; s14, continuously detecting the parameter value, and when the parameter value is less than or equal to the set value, the air conditioning system presses
The current state is operated and the parameter value is continuously detected;
when the compressor operates in a single cylinder mode and is provided with a first control valve and a second control valve, the method comprises the following steps:
s21, starting a refrigeration mode of the air conditioning system, opening the first control valve and the second control valve, and running for a preset time;
s22, detecting one of the parameter values representing the operating pressure of the air conditioning system, and if the parameter value is not more than a set value, operating the air conditioning system according to the current state and continuously detecting the parameter value;
s23, if the parameter value is larger than the set value, closing or closing the second control valve, and executing the step S24;
s24, detecting parameter values after running for a preset time, and if the parameter values are less than or equal to a set value, running the air conditioning system according to the current state and continuously detecting the parameter values;
s25, if the parameter value > the set value, execute S26;
s26, opening the second control valve, closing or closing the first control valve, continuously detecting the parameter value after running for a preset time, and when the parameter value is less than or equal to a set value, the air conditioning system runs according to the current state and continuously detects the parameter value;
when the compressor runs a double-cylinder working mode and is only provided with a first control valve or a second control valve, the method comprises the following steps:
s31, starting a refrigeration mode of the air conditioning system, opening a first control valve or a second control valve, and operating a double cylinder of the compressor;
s32, after the air conditioning system runs for a preset time, detecting one of the parameter values representing the running pressure of the air conditioning system, and if the parameter value is less than or equal to a set value, running the air conditioning system according to the current state and continuously detecting the parameter value;
s33, if the parameter value is larger than the set value, closing or closing the first control valve or the second control valve;
s34, after running for a preset time, continuously detecting the parameter value, if the parameter value is not more than the set value, the air conditioning system runs according to the current state and continuously detects the parameter value;
s35, if the first control valve or the second control valve is closed and the parameter value is larger than the set value, executing S36;
s36, closing the auxiliary cylinder of the compressor, continuously detecting the parameter value, and when the parameter value is less than or equal to the set value, the air conditioning system operates according to the current state and continuously detects the parameter value;
when the compressor runs a double-cylinder working mode and is provided with a first control valve and a second control valve, the method comprises the following steps:
s41, starting a refrigeration mode of the air conditioning system, opening both the first control valve and the second control valve, and operating the double cylinders of the compressor;
s42, after the air conditioning system runs for a preset time, detecting one of the parameter values representing the running pressure of the air conditioning system, and if the parameter value is less than or equal to a set value, running the air conditioning system according to the current state and continuously detecting the parameter value;
s43, if the parameter value is larger than the set value, closing or closing the second control valve, and executing the step S44;
s44, detecting parameter values after running for a preset time, if the parameter values are less than or equal to the set values, running according to the current state and continuously detecting the parameter values, and if the parameter values are greater than the set values, executing S45;
s45, opening the second control valve, closing or closing the first control valve, detecting a parameter value after running for a preset time, running according to the current state and continuously detecting the parameter value if the parameter value is less than or equal to a set value, and executing S46 if the parameter value is greater than the set value;
and S46, closing the auxiliary cylinder of the compressor, continuously detecting the parameter value, and when the parameter value is less than or equal to the set value, operating the air conditioning system according to the current state and continuously detecting the parameter value.
6. The control method of claim 5, wherein the parameter indicative of the operating pressure of the air conditioning system is a total machine current, a system pressure, a condenser coil temperature, or a discharge temperature.
7. The control method according to claim 5, wherein the preset time is 0 to 3 minutes.
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Publication number Priority date Publication date Assignee Title
CN109341125B (en) * 2018-11-16 2019-10-01 珠海格力电器股份有限公司 A kind of refrigeration system and control method
CN110186165B (en) * 2019-05-31 2021-04-02 宁波奥克斯电气股份有限公司 Control method and device of air conditioner

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1026728C2 (en) * 2004-07-26 2006-01-31 Antonie Bonte Improvement of cooling systems.
JP2006097972A (en) * 2004-09-29 2006-04-13 Denso Corp Accumulator refrigerating cycle
JP2006145170A (en) * 2004-11-24 2006-06-08 Denso Corp Refrigerating cycle
CN200975809Y (en) * 2006-09-29 2007-11-14 丘致琏 Improved frequency converting air-conditioner
NO327832B1 (en) * 2007-06-29 2009-10-05 Sinvent As Steam circuit compression dress system with closed circuit as well as method for operating the system.
JP2009097779A (en) * 2007-10-16 2009-05-07 Denso Corp Supercritical refrigerating cycle
KR20090052026A (en) * 2007-11-20 2009-05-25 김영환 A portable air conditioner
WO2009107395A1 (en) * 2008-02-28 2009-09-03 ダイキン工業株式会社 Refrigeration device
EP2796810A4 (en) * 2011-12-19 2016-03-16 Toyota Motor Co Ltd Cooling device
CN104567074B (en) * 2013-10-28 2017-11-14 珠海格力电器股份有限公司 Air-conditioning Cycle device and its control method
FR3012587B1 (en) * 2013-10-30 2018-05-11 Valeo Systemes Thermiques THERMAL CONDITIONING CIRCUIT OF A COCKPIT
CN104729130B (en) * 2013-12-24 2017-05-10 珠海格力电器股份有限公司 Air conditioning system and control method thereof
CN105626924B (en) * 2014-11-07 2018-02-06 广东美的制冷设备有限公司 The control method of throttle valve opening, the control device of throttle valve opening and air conditioner
CN104791960B (en) * 2015-04-30 2018-02-06 广东美的制冷设备有限公司 A kind of air conditioner unloading control system and method
CN105157284B (en) * 2015-08-21 2017-10-03 广东美的制冷设备有限公司 Air-conditioning system
CN204963278U (en) * 2015-09-30 2016-01-13 黄石东贝制冷有限公司 Efficient refrigerating system
CN105091387A (en) * 2015-09-30 2015-11-25 黄石东贝制冷有限公司 Efficient refrigerating system
CN105650819B (en) * 2016-02-01 2019-11-15 青岛海尔空调电子有限公司 A kind of control method for multi-gang air-conditioner high-temperature refrigeration
CN206281236U (en) * 2016-11-25 2017-06-27 广州华凌制冷设备有限公司 A kind of air-conditioning system for being applicable high-temperature refrigeration
CN108253668A (en) * 2018-02-27 2018-07-06 广东西屋康达空调有限公司 A kind of electromagnetic levitation type air-conditioning system
CN110822545A (en) * 2019-11-27 2020-02-21 广东海悟科技有限公司 Variable frequency air conditioning system and control method for low frequency operation thereof

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