CN110686419B - Control method of refrigeration system, refrigeration system and air conditioner - Google Patents

Control method of refrigeration system, refrigeration system and air conditioner Download PDF

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Publication number
CN110686419B
CN110686419B CN201910924457.4A CN201910924457A CN110686419B CN 110686419 B CN110686419 B CN 110686419B CN 201910924457 A CN201910924457 A CN 201910924457A CN 110686419 B CN110686419 B CN 110686419B
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China
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preparation
hot gas
gas bypass
bypass valve
control valve
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CN201910924457.4A
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CN110686419A (en
Inventor
李琪铎
周江峰
王严杰
杨二玲
陈东红
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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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
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
    • F24F5/001—Compression cycle type
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The application provides a refrigerating system's control method, including compressor and hot gas bypass valve subassembly, hot gas bypass valve subassembly includes hot gas bypass valve and control valve, and the first end of hot gas bypass valve is connected with the compressor gas vent through the pipeline, and the second end is connected with the compressor induction port through the pipeline, and the control valve is connected on the pipeline, and the control valve is used for controlling the break-make of hot gas bypass valve, includes: detecting a temperature adjusting load, wherein the temperature adjusting load is cold energy required to be supplied to the indoor space for adjusting the environment temperature to be a preset temperature; and controlling the on-off of the control valve according to the temperature regulation load. According to the control method of the refrigeration system, the on-off of the hot gas bypass valve component can be controlled according to the temperature regulation load, the hot gas bypass valve can be effectively prevented from misoperation, and the comfort is influenced.

Description

Control method of refrigeration system, refrigeration system and air conditioner
Technical Field
The application belongs to the technical field of air conditioners, and particularly relates to a control method of a refrigeration system, the refrigeration system and the air conditioner.
Background
At present, the fixed frequency unit is the mainstream type of the refrigeration equipment for the ship at present. In the fixed-frequency unit, the capacity of the unit can be unloaded by using a hot-gas bypass valve, so that the unit is prevented from being started and stopped frequently in a scene with large thermal load change, and the comfort and the reliability are improved. The hot gas bypass valve operates on the principle of bypassing refrigerant directly from the high pressure side to the low pressure side to reduce the refrigerant flow circulating through the system for unloading purposes.
However, the opening of the hot gas bypass valve is affected by the low pressure side pressure, i.e. the lower the low pressure, the larger the opening, the more refrigerant that is bypassed, and the greater the capacity unload. Under the actual application condition, the low pressure of the unit is influenced by a plurality of factors, such as dirty evaporator, blocked air return inlet and the like, the indoor load reduction cannot be completely represented, the bypass valve is easy to malfunction due to low pressure fluctuation caused by other factors, and the comfort is influenced.
Therefore, how to provide a bypass assembly for preventing the malfunction of the bypass valve, a control method of the refrigeration system, the refrigeration system and the air conditioner becomes a problem to be solved urgently by those skilled in the art.
Disclosure of Invention
Therefore, an object of the present invention is to provide a control method for a refrigeration system, and an air conditioner that can prevent a bypass valve from malfunctioning.
In order to solve the above problem, the present application provides a control method for a refrigeration system, including a compressor and a hot gas bypass valve assembly, where the hot gas bypass valve assembly includes a hot gas bypass valve and a control valve, a first end of the hot gas bypass valve is connected to an exhaust port of the compressor through a pipeline, a second end of the hot gas bypass valve is connected to an air suction port of the compressor through a pipeline, the control valve is connected to the pipeline, and the control valve is used for controlling on/off of the hot gas bypass valve, and includes:
detecting a temperature adjusting load, wherein the temperature adjusting load is cold energy required to be supplied to the indoor space for adjusting the environment temperature to be a preset temperature;
and controlling the on-off of the control valve according to the temperature regulation load.
Preferably, the step of detecting the temperature adjusting load comprises:
detecting indoor ambient temperature TRing (C)；
According to the ambient temperature TRing (C)And a first predetermined temperature T1Preparation ofThe difference in temperature determines the tempering load.
Preferably, the step of controlling the opening and closing of the hot gas bypass valve assembly according to the attemperation load comprises:
detecting indoor ambient temperature TRing (C)；
Judging the ambient temperature TRing (C)And a first predetermined temperature T1Preparation ofDifference between them and a preset difference delta TPreparation ofThe relationship of (1);
if T isRing (C)-T1Preparation of≥⊿T1Preparation ofControl the control valve to open, with Δ T1Preparation ofIs a first preset difference value;
if T1Preparation of-TRing (C)≥⊿T2Preparation ofAnd the compressor is in operation and the on-time H of the compressorOpening device≥HPreparation ofControlling the control valve to be communicated; wherein HPreparation ofFor a preset time, Δ T2Preparation ofIs a second preset difference value;
if T1Preparation of-1℃＜TRing (C)＜T1Preparation of+1 ℃, the control valve is controlled to maintain the current state.
Preferably, the control method of the refrigeration system further includes the steps of: when the compressor stops, the control valve is controlled to be disconnected;
and/or when the discharge temperature T of the compressorRow board≥T2Preparation ofWhen the control valve is opened, T2Preparation ofIs the second preset temperature.
Preferably, the first preset difference Δ T1Preparation ofIs 0 to 3; and/or the second predetermined difference Δ T2Preparation ofIs 0 to 3; and/or, HPreparation ofIs 5-30 min.
Preferably, the second preset temperature T2Preparation ofIs 0-120 ℃.
According to still another aspect of the present application, there is provided a refrigeration system, including a hot gas bypass valve assembly and a compressor, the hot gas bypass valve assembly includes a hot gas bypass valve and a control valve, a first end of the hot gas bypass valve is connected to an exhaust port of the compressor through a pipeline, a second end of the hot gas bypass valve is connected to an air suction port of the compressor through a pipeline, the control valve is connected to the pipeline, and the control valve is used for controlling on/off of the hot gas bypass valve.
Preferably, the control valve is a solenoid valve.
Preferably, the refrigeration system further comprises a gas-liquid separator, the first end of the hot gas bypass valve is connected with the exhaust port of the compressor through a pipeline, the second end of the hot gas bypass valve is connected with the liquid inlet pipe of the gas-liquid separator through a pipeline, the control valve is connected to the pipeline, and the control valve is used for controlling the on-off of the hot gas bypass valve.
According to still another aspect of the present application, there is provided an air conditioner including a refrigeration system as described above.
The control method of the refrigeration system can effectively prevent the bypass valve from misoperation caused by low-pressure fluctuation caused by other factors, such as misoperation of the hot gas bypass valve caused by low-pressure fluctuation caused by dirty evaporator, blockage of a return air inlet and the like without influencing the refrigeration performance of the refrigeration system; and the hot gas bypass valve misoperation can be effectively prevented by controlling the on-off of the control valve through the temperature-adjusting load in the application.
Drawings
Fig. 1 is a schematic structural diagram of a refrigeration system according to an embodiment of the present application.
The reference numerals are represented as:
11. a hot gas bypass valve; 12. a control valve; 2. a compressor; 3. a gas-liquid separator; 4. a condenser; 5. a restrictor; 6. an evaporator.
Detailed Description
Referring to fig. 1 in combination, according to an embodiment of the present application, a method for controlling a refrigeration system includes a compressor 2 and a hot gas bypass valve assembly, where the hot gas bypass valve assembly includes a hot gas bypass valve 11 and a control valve 12, a first end of the hot gas bypass valve 11 is connected to an exhaust port of the compressor 2 through a pipeline, a second end of the hot gas bypass valve is connected to an intake port of the compressor 2 through a pipeline, the control valve 12 is connected to the pipeline, and the control valve 12 is configured to control on/off of the hot gas bypass valve 11, and includes: detecting a temperature adjusting load, wherein the temperature adjusting load is cold energy required to be supplied to the indoor space for adjusting the environment temperature to be a preset temperature; the on-off of the control valve 12 is controlled according to the temperature regulation load, the on-off of the hot gas bypass valve component can be controlled according to the temperature regulation load, and the phenomenon that the low pressure fluctuation is caused by other factors, so that the hot gas bypass valve 11 is in misoperation, and the comfortableness is influenced is prevented. If the evaporator 6 becomes dirty or the return air inlet is blocked, low-pressure fluctuation is caused, and the refrigerating capacity of the refrigerating system is not influenced, the hot gas bypass valve 11 can be caused to malfunction, and the on-off of the hot gas bypass valve component is controlled according to the temperature regulation load, so that the condition is effectively avoided
Further, the step of detecting the temperature adjustment load includes:
detecting indoor ambient temperature TRing (C)；
According to the ambient temperature TRing (C)And a first predetermined temperature T1Preparation ofThe difference in temperature determines the tempering load.
Further, the step of controlling the on-off of the hot gas bypass valve assembly according to the temperature regulation load comprises the following steps:
detecting indoor ambient temperature TRing (C)；
Judging the ambient temperature TRing (C)And a first predetermined temperature T1Preparation ofDifference between them and a preset difference delta TPreparation ofThe relationship of (1);
if T isRing (C)-T1Preparation of≥⊿T1Preparation ofControl the control valve 12 to open, with Δ T1Preparation ofIs a first preset difference value;
if T1Preparation of-TRing (C)≥⊿T2Preparation ofAnd the compressor 2 is in operation and the on-time H of the compressor 2Opening device≥HPreparation ofThe control valve 12 is communicated; wherein HPreparation ofFor a preset time, Δ T2Preparation ofIs a second preset difference value;
if T1Preparation of-1℃＜TRing (C)＜T1Preparation of+1 deg.C, the control valve 12 is controlled to maintain the current state when TRing (C)-T1Preparation of≥⊿T1Preparation ofNamely, the temperature regulating amount is smaller than the environmental load, the control valve 12 is controlled to be disconnected, so that the hot gas bypass assembly is disconnected, and the refrigerant amount in the condensation, throttling and evaporation processes participating in the heat exchange process is increased; and when the compressor 2 is operated for a certain period of time, and T1Preparation of-TRing (C)≥⊿T2Preparation ofAnd the control valve 12 is communicated, so that the bypass assembly directly bypasses a part of refrigerant between the evaporator 6 and the suction port of the compressor 2 without passing through the condenser 4, the throttler 5 and the evaporator 6 and participating in the condensation, throttling and evaporation processes in the refrigeration process, thereby reducing the refrigeration capacity of the system, enabling the refrigeration capacity of the system to be closer to the environmental load, reducing the starting and stopping times of the compressor 2, improving the reliability, and if T1 is adopted, the control valve 12 is communicated, so that the bypass assembly directly bypasses a part of refrigerant to the space between the evaporator 6Preparation of-1℃＜TRing (C)＜T1Preparation of+1 deg.C, the control valve 12 does not change, at T1Preparation of-1℃＜TRing (C)＜T1Preparation ofBefore +1 ℃, the control valve 12 is communicated, and then the communication is continued; at T1Preparation of-1℃＜TRing (C)＜T1Preparation ofBefore +1 ℃, the control valve 12 is disconnected, and then the disconnection is continued at this time.
Further, the control method of the refrigeration system further comprises the steps of: when the compressor 2 is stopped, the control valve 12 is turned off;
and/or when the discharge temperature T of the compressor 2Row board≥T2Preparation ofWhen, the control valve 12 is opened, wherein T2Preparation ofFor the second preset temperature, when the exhaust temperature is too high, the control valve 12 is turned off, i.e., the hot gas bypass assembly is turned off, and the high temperature protection mode is turned on to prevent the too high exhaust temperature from affecting the compressor 2.
Further, the first preset difference Δ T1Preparation ofIs 0 to 3; and/or the second predetermined difference Δ T2Preparation ofIs 0 to 3; and/or, HPreparation ofIs 5-30 min.
Further, a second preset temperature T2Preparation ofIs 0-120 ℃.
According to the embodiment of the application, a refrigeration system is also disclosed, which comprises a hot gas bypass valve assembly and a compressor 2, wherein the hot gas bypass valve assembly comprises a hot gas bypass valve 11 and a control valve 12, a first end of the hot gas bypass valve 11 is connected with an exhaust port of the compressor 2 through a pipeline, a second end of the hot gas bypass valve is connected with an air suction port of the compressor 2 through a pipeline, the control valve 12 is connected with the pipeline, the control valve 12 is used for controlling the on-off of the hot gas bypass valve 11, a part of refrigerant can be directly bypassed between the evaporator 6 and the air suction port of the compressor 2, does not participate in the condensation, throttling and evaporation processes in the refrigeration process, thereby reducing the refrigerating capacity of the system, leading the refrigerating capacity of the system to be closer to the environmental load, reducing the starting and stopping times of the compressor 2, improving the reliability, and the control valve 12 is used for controlling the on-off of the hot gas bypass valve 11, so that the misoperation of the hot gas bypass valve 11 caused by pressure fluctuation caused by other factors can be effectively avoided.
Further, the control valve 12 is a solenoid valve.
Further, the refrigeration system further comprises a gas-liquid separator 3, a first end of the hot gas bypass valve 11 is connected with an exhaust port of the compressor 2 through a pipeline, a second end of the hot gas bypass valve is connected with a liquid inlet pipe of the gas-liquid separator 3 through a pipeline, a control valve 12 is connected to the pipeline, and the control valve 12 is used for controlling the on-off of the hot gas bypass valve 11.
Further, a temperature sensor is installed indoors to detect the ambient temperature TRing (C)And the temperature sensor is connected with the refrigeration system.
Furthermore, the temperature sensor is arranged on a manual operator on the wall or in the indoor unit, when the air conditioner is started, the temperature can be monitored in real time, and when the compressor is normally started, the system starts to time.
According to an embodiment of the application, an air conditioner is further disclosed, and the air conditioner comprises a refrigerating system.
It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.
The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.

Claims (10)

1. The control method of the refrigeration system comprises a compressor (2) and a hot gas bypass valve assembly, wherein the hot gas bypass valve assembly comprises a hot gas bypass valve (11) and a control valve (12), the first end of the hot gas bypass valve (11) is connected with an exhaust port of the compressor (2) through a pipeline, the second end of the hot gas bypass valve is connected with an air suction port of the compressor (2) through a pipeline, the control valve (12) is connected onto the pipeline, and the control valve (12) is used for controlling the on-off of the hot gas bypass valve (11) and is characterized by comprising the following steps:
detecting a temperature adjusting load, wherein the temperature adjusting load is cold energy required to be supplied to the indoor space for adjusting the environment temperature to a preset temperature;
the on-off of the control valve (12) is controlled according to the temperature regulation load.
2. The method of claim 1, wherein the step of detecting the tempering load comprises:
detecting the ambient temperature T in the roomRing (C)；
According to the ambient temperature TRing (C)And a first predetermined temperature T1Preparation ofThe difference in temperature determines the tempering load.
3. The method of claim 1, wherein the step of controlling the opening and closing of the hot gas bypass valve assembly according to the attemperation load comprises:
detecting indoor ambient temperature TRing (C)；
Judging the ambient temperature TRing (C)And a first predetermined temperature T1Preparation ofDifference between them and a preset difference delta TPreparation ofThe relationship of (1);
if T isRing (C)-T1Preparation of≥⊿T1Preparation ofControlling said control valve (12) to open with Δ T1Preparation ofIs a first preset difference value;
if T1Preparation of-TRing (C)≥⊿T2Preparation ofAnd the compressor (2) is in an operating state and the on-time H of the compressor (2)Opening device≥HPreparation ofControlling the control valve (12) to be communicated; wherein HPreparation ofFor a preset time, Δ T2Preparation ofIs a second preset difference value;
if T1Preparation of-1℃＜TRing (C)＜T1Preparation of+1 ℃, controlling the control valve (12) to maintain the current state.
4. The method of claim 1, further comprising the steps of: when the compressor (2) is stopped, controlling the control valve (12) to be disconnected;
and/or when the discharge temperature T of the compressor (2)Row board≥T2Preparation ofWhen the control valve (12) is controlled to be disconnected, wherein T2Preparation ofIs the second preset temperature.
5. Method for controlling a refrigeration system according to claim 3, characterized in that said first preset difference Δ T1Preparation ofIs 0 to 3; and/or said second predetermined difference Δ T2Preparation ofIs 0 to 3; and/or, the HPreparation ofIs 5-30 min.
6. Control method of a refrigeration system according to claim 4, characterized in that said second preset temperature T2Preparation ofIs 0-120 ℃.
7. A refrigeration system adopting the control method of any one of claims 1 to 6, characterized by comprising a hot gas bypass valve assembly and a compressor (2), wherein the hot gas bypass valve assembly comprises a hot gas bypass valve (11) and a control valve (12), a first end of the hot gas bypass valve (11) is connected with a discharge port of the compressor (2) through a pipeline, a second end of the hot gas bypass valve is connected with a suction port of the compressor (2) through a pipeline, the control valve (12) is connected with the pipeline, and the control valve (12) is used for controlling the on-off of the hot gas bypass valve (11).
8. A refrigeration system according to claim 7, characterized in that the control valve (12) is a solenoid valve.
9. The refrigeration system according to claim 7, further comprising a gas-liquid separator (3), wherein a first end of the hot gas bypass valve (11) is connected with a gas outlet of the compressor (2) through a pipeline, a second end of the hot gas bypass valve is connected with a liquid inlet pipe of the gas-liquid separator (3) through a pipeline, the control valve (12) is connected with the pipeline, and the control valve (12) is used for controlling the on-off of the hot gas bypass valve (11).
10. An air conditioner characterized by comprising a refrigeration system, the refrigeration system being the refrigeration system of any one of claims 7-9.
CN201910924457.4A 2019-09-27 2019-09-27 Control method of refrigeration system, refrigeration system and air conditioner Active CN110686419B (en)

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Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0484072A (en) * 1990-07-26 1992-03-17 Matsushita Seiko Co Ltd Air conditioner
JP2651328B2 (en) * 1992-09-16 1997-09-10 タバイエスペック株式会社 Method and apparatus for controlling hot gas bypass circuit of refrigeration circuit
JP2001033114A (en) * 1999-07-19 2001-02-09 Fujitsu General Ltd Air conditioner
KR100502311B1 (en) * 2003-10-17 2005-07-21 위니아만도 주식회사 By-pass structure for outdoor device of air-conditioner
ITPN20050017A1 (en) * 2005-03-14 2006-09-15 Domnick Hunter Hiross S P A "CONTROL SYSTEM FOR REFRIGERATED GAS COMPRESSED DRYERS".
JP2009281631A (en) * 2008-05-21 2009-12-03 Panasonic Corp Heat pump unit
CN109737634A (en) * 2019-02-22 2019-05-10 广东海悟科技有限公司 A kind of non-stop-machine heat pump air conditioning system of low temperature and its control method

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