CN109297148A - Heat pump unit, refrigeration starting low-voltage protection method thereof, computer equipment and storage medium - Google Patents
Heat pump unit, refrigeration starting low-voltage protection method thereof, computer equipment and storage medium Download PDFInfo
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- 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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- pressure
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- time
- cooling activation
- low pressure
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000005057 refrigeration Methods 0.000 title claims abstract description 28
- 238000001816 cooling Methods 0.000 claims description 41
- 230000004913 activation Effects 0.000 claims description 38
- 230000007774 longterm Effects 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000011084 recovery Methods 0.000 claims description 3
- 238000001994 activation Methods 0.000 description 28
- 239000003507 refrigerant Substances 0.000 description 15
- 238000004590 computer program Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
- F24F11/67—Switching between heating and cooling modes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control 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
- F24F11/84—Control 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
-
- 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
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/10—Pressure
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Human Computer Interaction (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a heat pump unit and a refrigeration starting low-voltage protection method thereof. The refrigeration starting low-pressure protection method detects the shutdown time length when starting up, if the shutdown time length is more than or equal to a set threshold value, the refrigeration starting mode is automatically placed for a long time, and the refrigeration starting mode is placed for a long time to control the unit to enter the conventional refrigeration mode to operate according to the comparison result of the system low-pressure and the set pressure threshold value. The invention well solves the problem that the heat pump unit cannot be started due to low-voltage protection when the heat pump unit is started for refrigeration after being placed for a long time, and reduces the failure rate of the heat pump unit.
Description
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811027443.4A CN109297148B (en) | 2018-09-04 | 2018-09-04 | Heat pump unit, refrigeration starting low-voltage protection method thereof, computer equipment and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811027443.4A CN109297148B (en) | 2018-09-04 | 2018-09-04 | Heat pump unit, refrigeration starting low-voltage protection method thereof, computer equipment and storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109297148A true CN109297148A (en) | 2019-02-01 |
| CN109297148B CN109297148B (en) | 2019-11-08 |
Family
ID=65166296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811027443.4A Active CN109297148B (en) | 2018-09-04 | 2018-09-04 | Heat pump unit, refrigeration starting low-voltage protection method thereof, computer equipment and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109297148B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112178887A (en) * | 2020-09-27 | 2021-01-05 | 广东芬尼克兹节能设备有限公司 | Four-way valve switching control method and device |
| CN113551378A (en) * | 2020-04-26 | 2021-10-26 | 青岛海尔空调电子有限公司 | Control method, system and device for preventing low-voltage fault during low-temperature heating starting of air conditioner |
| CN113692189A (en) * | 2021-08-18 | 2021-11-23 | 珠海格力电器股份有限公司 | Machine room air conditioner, control method and device thereof, storage medium and processor |
| CN115628566A (en) * | 2022-12-19 | 2023-01-20 | 山东赛斯特冷冻系统有限公司 | Cold and hot synchronous screw type water chilling unit |
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| CN113551378A (en) * | 2020-04-26 | 2021-10-26 | 青岛海尔空调电子有限公司 | Control method, system and device for preventing low-voltage fault during low-temperature heating starting of air conditioner |
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| CN115628566A (en) * | 2022-12-19 | 2023-01-20 | 山东赛斯特冷冻系统有限公司 | Cold and hot synchronous screw type water chilling unit |
| CN115628566B (en) * | 2022-12-19 | 2023-03-17 | 山东赛斯特冷冻系统有限公司 | Cold and hot synchronous screw type water chilling unit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109297148B (en) | 2019-11-08 |
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