CN109297148A - Heat pump unit, its cooling activation low-voltage variation method, computer equipment and storage medium - Google Patents

Heat pump unit, its cooling activation low-voltage variation method, computer equipment and storage medium Download PDF

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Publication number
CN109297148A
CN109297148A CN201811027443.4A CN201811027443A CN109297148A CN 109297148 A CN109297148 A CN 109297148A CN 201811027443 A CN201811027443 A CN 201811027443A CN 109297148 A CN109297148 A CN 109297148A
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CN
China
Prior art keywords
pressure
low
cooling activation
voltage variation
low pressure
Prior art date
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CN201811027443.4A
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Chinese (zh)
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CN109297148B (en
Inventor
刘思源
程琦
钟海玲
黄凯亮
陈培生
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珠海格力电器股份有限公司
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Publication of CN109297148A publication Critical patent/CN109297148A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/50Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61Control or safety arrangements characterised by user interfaces or communication using timers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/62Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63Electronic processing
    • F24F11/64Electronic processing using pre-stored data
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/62Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63Electronic processing
    • F24F11/65Electronic processing for selecting an operating mode
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/62Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63Electronic processing
    • F24F11/65Electronic processing for selecting an operating mode
    • F24F11/67Switching between heating and cooling modes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/70Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00Air-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
    • F24F5/0007Air-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
    • F24F5/001Compression cycle type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00Control inputs relating to system states
    • F24F2140/10Pressure

Abstract

The invention discloses a kind of heat pump unit and its cooling activation low-voltage variation methods.Duration is shut down in cooling activation low-voltage variation method detection in booting; if shutting down duration is more than or equal to given threshold; cooling activation mode then is placed automatically into long-term, the long-term placement cooling activation mode controls unit according to the comparison result of system low-voltage pressure and the pressure threshold of setting and enters normal refrigeration mode operation.The present invention has well solved cooling activation after heat pump unit is placed for a long time and the problem of low-voltage variation can not start has occurred, and reduces unit rate of breakdown.

Description

Heat pump unit, its cooling activation low-voltage variation method, computer equipment and storage medium

Technical field

The present invention relates to air-conditioning technical field more particularly to a kind of heat pump unit, its cooling activation low-voltage variation method, meters Calculate machine equipment and storage medium.

Background technique

Cooling by wind is mostly used in outdoor environment, it is long-term place after, exist because of environment temperature round the clock or seasonal become Change greatly, the possibility of refrigerant migration in system, refrigerant is moved in the biggish condenser of volume by system pipeline and stored, and then leads to machine Due to coolant quantity deficiency in low-pressure side low-voltage variation occurs for group during cooling activation after long-term place, and can not start unit The case where operation.Therefore, for Air-Cooled Heat Pump Unit because variation of ambient temperature is big, caused by caused shutdown status refrigerant migration The phenomenon that low-voltage variation can not start, which occurs, in cooling activation after long-term placement is needed in the industry in view of technical problem.

Summary of the invention

Against the above technical problems, the present invention proposes a kind of heat pump unit, its cooling activation low-voltage variation method, computer Equipment and storage medium can not be started with solving the problems, such as after unit is placed for a long time that low-voltage variation occurs in cooling activation.

The technical solution adopted by the present invention is that proposing a kind of cooling activation low-voltage variation method, this method is examined in booting Duration is shut down in survey, described automatically into long-term placement cooling activation mode if shutting down duration is more than or equal to setting time threshold value Long-term placement cooling activation mode enters routine according to the comparison result control unit of system low-voltage pressure and setting pressure threshold Refrigeration mode operation.

The setting pressure threshold includes placing to allow pressure Pz and place to restore pressure Pr, Pr > Pz.

The long-term placement cooling activation mode the following steps are included:

After step 10. unit starting refrigeration, primary system low pressure is detected every time T1, as low pressure continuous time T2 When less than placing permission pressure Pz, four-way valve commutation, unit is switched to heating mode;

Step 20. is according to system low-voltage pressure PLow pressureConventional system is switched back into the comparison result control unit for restoring pressure Pr is placed Cold mode.

Preferably, low every time T1 detection primary system in time T3 into after heating mode in the step 20 Pressure pressure, and following judgement is carried out after time T4:

If continuous time T5 detects system low-voltage pressure PLow pressureWhen more than or equal to placing recovery pressure Pr, four-way valve commutation, switching Return normal refrigeration mode operation;

If continuous time T5 detects low pressure PLow pressureRestore pressure Pr less than placing, and when current system low pressure Pm is subtracted Between before T4 the difference of system low-voltage pressure Pn be more than or equal to 10KPa, four-way valve state is constant, until low pressure PLow pressureGreater than etc. Restore pressure Pr or runing time greater than four-way valve automatic reverse after time T3 in placing, switches back into normal refrigeration mode operation;

If continuous time T5 detects low pressure PLow pressureRestore pressure Pr less than placing, and when current system low pressure Pm is subtracted Between before T4 the difference of system low-voltage pressure Pn be less than 10KPa, four-way valve commutation switches back into normal refrigeration mode operation;

Above time T1, T2, T3, T4 and T5 are preset time.In one embodiment, the preset time T 1, T2, T3, T4 and T5 is respectively as follows: 3 seconds, 15 seconds, 2 minutes, 30 seconds and 10 seconds.

Also a kind of heat pump unit of the present invention, the heat pump unit run above-mentioned cooling activation low pressure in cooling activation and protect Maintaining method.

The present invention also proposes a kind of computer equipment, including memory, processor and storage on a memory and can located The computer program run on reason device, the processor realize above-mentioned cooling activation low-voltage variation method when executing described program.

The present invention also proposes a kind of storage medium comprising computer executable instructions, the storage medium executable instruction When being subsequently can by computer device operation for executing above-mentioned cooling activation low-voltage variation method.

It can not be opened the beneficial effects of the present invention are: solving cooling activation after heat pump unit is placed for a long time and low-voltage variation occur Dynamic problem reduces unit rate of breakdown.

Detailed description of the invention

Fig. 1 is the system schematic of Air-Cooled Heat Pump Unit;

Fig. 2 is the flow chart of Air-Cooled Heat Pump Unit cooling activation low-voltage variation method.

Specific embodiment

The present invention will be described in detail with reference to the accompanying drawings and examples.

As shown in Figure 1, Air-Cooled Heat Pump Unit includes compressor 1, the oil eliminator 2, four-way valve 3, room connected by pipeline External heat exchanger 4, throttle valve 5 and indoor heat exchanger 6.In the embodiment, outdoor heat exchanger uses finned heat exchanger, indoor heat exchanger Using case tube heat exchanger.

Two kinds of operational modes of heat pump unit are as follows:

Refrigeration: the high temperature and pressure cold media gas being discharged from compressor 1 enters oil eliminator 2, and refrigerant passes through four-way by oil eliminator 2 Valve 3 enter outdoor heat exchanger 4, in finned heat exchanger occur condensation after, become the cold media gas of medium temperature high pressure, then by After throttle valve 5 is depressured, becomes low-temp low-pressure liquid refrigerants and enter the room heat exchanger 6, evaporation occurs in case tube heat exchanger Afterwards, become low-temp low-pressure gaseous coolant, the suction end of compressor 1 is then returned by four-way valve 3.

Heating: the high temperature and pressure cold media gas being discharged from compressor 1 enters oil eliminator 2, and refrigerant is passed through by oil eliminator 2 Four-way valve 3 enters the room heat exchanger 6, becomes medium temperature high pressure refrigerant gas after condensation occurs in case tube heat exchanger, then After being depressured by throttle valve 5, become low-temp low-pressure liquid refrigerants and enter outdoor heat exchanger 4, evaporation occurs in finned heat exchanger and makees With rear, refrigerant becomes low-temp low-pressure gaseous state, and the suction end of compressor is then returned by four-way valve 3.

When cooling by wind, which is placed, is again started up refrigeration cycle for a long time, after placing for a long time, refrigerant is by being Road under the overall leadership moves to be stored in the biggish condenser of volume, and then causes unit during cooling activation due to refrigerant in low-pressure side It measures insufficient unit and triggers low-voltage variation, unit operation can not be started.

The present invention proposes that a kind of cooling activation low-voltage variation method, this method pass through mainboard in booting for above situation Available machine time last time is detected, if duration is too long, places cooling activation mode automatically into long-term, which is different from conventional system Cold start mode.Long-term cooling activation mode of placing is commutated when low pressure, which is less than placement, allows pressure Pz by four-way valve, It is introduced into heating mode, throttle valve starts logic control according to conventional refrigerant, after low pressure rises to safe range, switching Return normal refrigeration mode.

Cooling activation low-voltage variation method proposed by the present invention specifically includes the following steps:

When Air-Cooled Heat Pump Unit starts refrigeration cycle, mainboard judges whether unit is to start refrigeration cycle after placing for a long time, sentences Disconnected mode allows to place for whether the absolute value t of mainboard detection machine group Startup time and last last time of running difference is greater than Maximum time T, if t < T, unit cooling activation enter normal refrigeration mode;If t≤T, unit cooling activation enters long-term Place cooling activation mode.

It is long-term to place cooling activation process are as follows: after unit is by refrigeration mode starting, mainboard is every the time T1(embodiment 3 seconds) detection primary system low pressure PLow pressure, throttle valve is controlled according to conventional refrigerant start-up mode, when low pressure continuous time The T2(embodiment be 15 seconds) be less than place allow pressure Pz when, PLow pressure< Pz, four-way valve commutation enters heating mode, at this point, pressure Contracting machine is not shut down and load is constant, and the blower of outdoor finned heat exchanger is closed, and the time T3(embodiment is 2 minutes later) in it is every Every the time T1(embodiment be 3 seconds) low pressure of detection, the time T4(embodiment is 30 seconds) after, start to carry out following Judgement:

If the continuous time T5(embodiment is 10 seconds) detect system low-voltage pressure PLow pressureRestore pressure Pr more than or equal to placing When, PLow pressure≤ Pr, then four-way valve commutates, and system switches back into normal refrigeration mode operation, and compressor is not shut down and load is constant, section Stream valve and outdoor heat exchanger blower fan are controlled according to conventional refrigerant;

If the continuous time T5(embodiment is 10 seconds) detection low pressure PLow pressureRestore pressure Pr, P less than placingLow pressure< Pr, and Current system low pressure Pm subtract the T4(embodiment be 30 seconds) before system low-voltage pressure Pn difference be more than or equal to 10KPa, Pm-Pn >=10KPa, then four-way valve state is constant, until low pressure PLow pressureRestore pressure Pr, P more than or equal to placingLow pressure≤ Pr, Or runing time be greater than the time T3(embodiment be 2 minutes) four-way valve automatic reverse afterwards, system switch back into refrigeration mode operation;

If the continuous time T5(embodiment is 10 seconds) detection low pressure PLow pressureRestore pressure Pr less than placing, and current system Low pressure Pm subtract the time T4(embodiment be 30 seconds) before system low-voltage pressure Pn difference be less than 10KPa, Pm-Pn < 10KPa, then four-way valve commutates, and system switches back into refrigeration mode operation, at this point, compressor is not shut down and load is constant, throttle valve It is controlled with outdoor finned heat exchanger blower according to conventional refrigerant.

The above recovery pressure Pr > that places places permission pressure Pz, and time T1, T2, T3, T4 and T5 are preset value, and unit opens It is dynamic to be defaulted as compressor start.

Heat pump unit cooling activation low-voltage variation method very good solution proposed by the present invention unit is made after placing for a long time There is the problem of low-voltage variation can not start in cold start-up, and reduces a possibility that heat pump unit breaks down.

The present invention also proposes a kind of computer equipment, including memory, processor and storage on a memory and can located The computer program run on reason device, the processor realize above-mentioned cooling activation low-voltage variation method when executing described program.

The present invention also proposes a kind of storage medium comprising computer executable instructions, the storage medium executable instruction When being subsequently can by computer device operation for executing above-mentioned cooling activation low-voltage variation method.

Above-described embodiment is merely to illustrate a specific embodiment of the invention.It should be pointed out that for the general of this field For logical technical staff, without departing from the inventive concept of the premise, several deformations and variation can also be made, these deformations and Variation all should belong to protection scope of the present invention.

Claims (8)

1. a kind of cooling activation low-voltage variation method, which is characterized in that duration is shut down in this method detection in booting, if shut down It is long to be more than or equal to setting time threshold value, then cooling activation mode, the long-term placement cooling activation mould are placed automatically into long-term Formula enters normal refrigeration mode operation according to the comparison result control unit of system low-voltage pressure and setting pressure threshold.
2. cooling activation low-voltage variation method as described in claim 1, which is characterized in that the setting pressure threshold includes putting Setting allows pressure Pz and places to restore pressure Pr, Pr > Pz.
3. cooling activation low-voltage variation method as claimed in claim 2, which is characterized in that the long-term placement cooling activation mould Formula the following steps are included:
After step 10. unit starting refrigeration, primary system low pressure is detected every time T1, as low pressure continuous time T2 When less than placing permission pressure Pz, four-way valve commutation, unit is switched to heating mode;
Step 20. is according to system low-voltage pressure PLow pressureConventional system is switched back into the comparison result control unit for restoring pressure Pr is placed Cold mode.
4. cooling activation low-voltage variation method as claimed in claim 3, which is characterized in that the step 20 enters heating mode Afterwards, primary system low pressure is detected every time T1 in time T3, and carries out following judgement after time T4:
If continuous time T5 detects system low-voltage pressure PLow pressureWhen more than or equal to placing recovery pressure Pr, four-way valve commutation, switching Return normal refrigeration mode operation;
If continuous time T5 detects low pressure PLow pressureRestore pressure Pr less than placing, and when current system low pressure Pm is subtracted Between before T4 the difference of system low-voltage pressure Pn be more than or equal to 10KPa, four-way valve state is constant, until low pressure PLow pressureGreater than etc. Restore pressure Pr or runing time greater than four-way valve automatic reverse after time T3 in placing, switches back into normal refrigeration mode operation;
If continuous time T5 detects low pressure PLow pressureRestore pressure Pr less than placing, and when current system low pressure Pm is subtracted Between before T4 the difference of system low-voltage pressure Pn be less than 10KPa, four-way valve commutation switches back into normal refrigeration mode operation;
Above time T1, T2, T3, T4 and T5 are preset time.
5. cooling activation low-voltage variation method as claimed in claim 4, which is characterized in that the preset time T 1, T2, T3, T4 and T5 is respectively as follows: 3 seconds, 15 seconds, 2 minutes, 30 seconds and 10 seconds.
6. a kind of heat pump unit, which is characterized in that the heat pump unit runs any one of claim 1-5 institute in cooling activation The cooling activation low-voltage variation method stated.
7. a kind of computer equipment including memory, processor and stores the meter that can be run on a memory and on a processor Calculation machine program, which is characterized in that realize that the described in any item refrigeration of claim 1-5 open when the processor executes described program Dynamic low-voltage variation method.
8. a kind of storage medium comprising computer executable instructions, which is characterized in that the storage medium executable instruction exists The described in any item cooling activation low-voltage variation methods of 1-5 are required for perform claim when being subsequently can by computer device operation.
CN201811027443.4A 2018-09-04 2018-09-04 Heat pump unit, its cooling activation low-voltage variation method, computer equipment and storage medium CN109297148B (en)

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CN201811027443.4A CN109297148B (en) 2018-09-04 2018-09-04 Heat pump unit, its cooling activation low-voltage variation method, computer equipment and storage medium

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CN109297148B CN109297148B (en) 2019-11-08

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080198549A1 (en) * 2006-01-19 2008-08-21 American Power Conversion Corporation Cooling system and method
CN105042701A (en) * 2015-09-02 2015-11-11 广东美的制冷设备有限公司 Split floor type air conditioner and anti-explosion control method and device
JP2016507717A (en) * 2013-06-19 2016-03-10 エヌイーシー ラボラトリーズ アメリカ インクNEC Laboratories America, Inc. Zone-based heating, ventilation, and air conditioning (HVAC) control using extensive temperature monitoring
CN106123203A (en) * 2016-06-15 2016-11-16 珠海格力电器股份有限公司 The control method of air-conditioner and device
KR20170050035A (en) * 2015-10-29 2017-05-11 박영찬 Computing center system placement using iot
CN107036322A (en) * 2017-05-19 2017-08-11 西安交通大学 Low filling quantity of refrigerant heat pump assembly and its control method
CN107166688A (en) * 2017-07-10 2017-09-15 广东美的暖通设备有限公司 Control method, control device and the air conditioner of air conditioner
CN206847112U (en) * 2017-05-19 2018-01-05 西安交通大学 Low filling quantity of refrigerant heat pump assembly

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080198549A1 (en) * 2006-01-19 2008-08-21 American Power Conversion Corporation Cooling system and method
JP2016507717A (en) * 2013-06-19 2016-03-10 エヌイーシー ラボラトリーズ アメリカ インクNEC Laboratories America, Inc. Zone-based heating, ventilation, and air conditioning (HVAC) control using extensive temperature monitoring
CN105042701A (en) * 2015-09-02 2015-11-11 广东美的制冷设备有限公司 Split floor type air conditioner and anti-explosion control method and device
KR20170050035A (en) * 2015-10-29 2017-05-11 박영찬 Computing center system placement using iot
CN106123203A (en) * 2016-06-15 2016-11-16 珠海格力电器股份有限公司 The control method of air-conditioner and device
CN107036322A (en) * 2017-05-19 2017-08-11 西安交通大学 Low filling quantity of refrigerant heat pump assembly and its control method
CN206847112U (en) * 2017-05-19 2018-01-05 西安交通大学 Low filling quantity of refrigerant heat pump assembly
CN107166688A (en) * 2017-07-10 2017-09-15 广东美的暖通设备有限公司 Control method, control device and the air conditioner of air conditioner

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