CN110332742A - Hot water apparatus and heat pump system control method, heat pump system control device - Google Patents
Hot water apparatus and heat pump system control method, heat pump system control device Download PDFInfo
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- CN110332742A CN110332742A CN201910612055.0A CN201910612055A CN110332742A CN 110332742 A CN110332742 A CN 110332742A CN 201910612055 A CN201910612055 A CN 201910612055A CN 110332742 A CN110332742 A CN 110332742A
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- temperature
- heat pump
- pump system
- compression ratio
- system control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
-
- 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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2513—Expansion valves
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- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention discloses a kind of heat pump system control methods, are applied to hot water apparatus, method includes the following steps: obtaining the current water temperature of environment temperature and water tank；The compression ratio of compressor is determined according to the environment temperature and the current water temperature；Judge whether the compression ratio is greater than the first preset value；If the compression ratio is greater than first preset value, controls electric expansion valve and increase aperture.The invention also discloses a kind of heat pump system control device and hot water apparatus.The present invention is directed to improve compressor reliability of operation, reliability and the service life of system are improved.
Description
Technical field
The present invention relates to technical field of heat pumps more particularly to heat pump system control methods, heat pump system control device and heat
Water installations.
Background technique
In heat pump system of air source heat pump water heater, kernel component is compressor, compressor as precise part,
Its operational reliability deeply influences reliability and the service life of system.Existing air source hot pump water heater is in system protection side
Face, generally by high voltage protective, low-voltage variation, excessive discharge temperature protection or the excessively high protection of evaporator coil temperature etc., cold
When matchmaker's pressure is higher than maximum limit, refrigerant pressure lower than minimum limit value, excessive discharge temperature or excessively high coil temperature, it can control
Evaporation side blower processed stops or fall-back, to reduce evaporating temperature and the degree of superheat, to reduce compressor exhaust temperature, improves
Compressor operational reliability.
However, even if the reliability of system is protected by above-mentioned various ways, but due to unit cost pressure heat pump system
In be not provided with high-low pressure pressure sensor, being not directed to detection, whether relevant parameter excessively high to the compression ratio of compressor supervises
Control, then the compression ratio that will lead to compressor exceeds the compression ratio range of its reliability service, to reduce the reliability of compressor, shadow
Acoustic system operational reliability reduces lifetime of system.
Above content is only used to facilitate the understanding of the technical scheme, and is not represented and is recognized that above content is existing skill
Art.
Summary of the invention
The present invention provides a kind of heat pump system control method, is applied to hot water apparatus, the heat pump system control method packet
Include following steps:
Obtain the current water temperature of environment temperature and water tank；
The compression ratio of compressor is determined according to the environment temperature and the current water temperature；
Judge whether the compression ratio is greater than the first preset value；
If the compression ratio is greater than first preset value, controls electric expansion valve and increase aperture.
Optionally, the step of control electric expansion valve increase aperture includes:
The adjustment amplitude of the aperture of the electric expansion valve is determined according to the environment temperature；
The electric expansion valve, which is controlled, according to the adjustment amplitude increases aperture.
Optionally, the step of compression ratio of compressor is determined according to the environment temperature and current water temperature packet
It includes:
The condensing pressure that the heat pump system is determined according to the current water temperature determines the heat according to the environment temperature
The evaporating pressure of pumping system；
The compression ratio is calculated according to the condensing pressure and the evaporating pressure.
Optionally, the condensing pressure that the heat pump system is determined according to the current water temperature, according to the environment temperature
Degree determines that the step of evaporating pressure of the heat pump system includes:
Condensation temperature is determined according to the current water temperature and the first default heat transfer temperature difference, according to the environment temperature and second
Default heat transfer temperature difference determines evaporating temperature；
The condensing pressure is determined according to the condensation temperature, and the evaporating pressure is determined according to the evaporating temperature.
Optionally, described that condensation temperature is determined according to the current water temperature and the first default heat transfer temperature difference, according to the ring
The step of border temperature and the second default heat transfer temperature difference determine evaporating temperature include:
Condensation correction factor and evaporation correction factor are determined according to the environment temperature；
The condensation temperature is determined according to the condensation correction factor, the first default heat transfer temperature difference and the current water temperature
Degree, determines the evaporating temperature according to the evaporation correction factor, the second default heat transfer temperature difference and the environment temperature.
Optionally, described that the condensing pressure is determined according to the condensation temperature, according to evaporating temperature determination
The step of evaporating pressure includes:
Determine refrigerant type current in the heat pump system；
The condensing pressure is determined according to the refrigerant type and the condensation temperature, according to the refrigerant type and described
Evaporating temperature determines the evaporating pressure.
Optionally, after the step of control electric expansion valve increase aperture, further includes:
Determine the current compression ratio of the compressor；
Judge whether the current compression ratio is greater than or equal to the second preset value；
If the current compression ratio is greater than or equal to second preset value, returns and execute the control electric expansion valve
The step of increasing aperture；
Wherein, second preset value is less than or equal to first preset value.
Optionally, it is described judge the step of whether current compression ratio is greater than or equal to the second preset value after, also wrap
It includes:
When the current compression ratio is less than second preset value, returning for the compressor of presently described heat pump system is obtained
The coil temperature of the gas degree of superheat, the delivery temperature of compressor and/or evaporator；
According to the return-air degree of superheat, the delivery temperature and/or the coil temperature, the electricity of the heat pump system is adjusted
The aperture of sub- expansion valve.
Optionally, described to obtain presently described heat pump system when the current compression ratio is less than second preset value
Before the step of coil temperature of the return-air degree of superheat of compressor, the delivery temperature of compressor and/or evaporator, further includes:
The heat pump system is counted to be less than the first duration that the compression ratio of second preset value is run；
When first duration is greater than or equal to the first preset duration, the presently described heat pump system of acquisition is executed
Unite the return-air degree of superheat of compressor, the delivery temperature of compressor and/or evaporator coil temperature the step of.
Optionally, it is described judge the step of whether compression ratio is greater than the first preset value after, further includes:
When the compression ratio is less than or equal to first preset value, returning for presently described heat pump system compressor is obtained
The coil temperature of the gas degree of superheat, the delivery temperature of compressor and/or evaporator；
According to the return-air degree of superheat, the delivery temperature and/or the coil temperature, the electricity of the heat pump system is adjusted
The aperture of sub- expansion valve；And/or
When the compression ratio is greater than first preset value, the step of control electric expansion valve increase aperture it
Before, further includes:
The heat pump system is counted to be greater than the second duration that the compression ratio of first preset value is run；
When second duration is greater than or equal to the second preset duration, executes the control electric expansion valve and increase
The step of aperture.
In addition, to achieve the goals above, the application also proposes a kind of heat pump system control device, the heat pump system control
Device processed includes: memory, processor and is stored in the heat pump system that can be run on the memory and on the processor
Program is controlled, the heat pump system control program realizes as above described in any item heat pump system controls when being executed by the processor
The step of method processed.
In addition, to achieve the goals above, the application also proposes that a kind of hot water apparatus, the hot water apparatus include institute as above
The heat pump system control device stated.
A kind of heat pump system control method proposed by the present invention, be applied to hot water apparatus in, by obtain environment temperature and
Water temperature in the water tank of heat pump system realizes the determination to compression ratio, and when compression ratio is greater than the first preset value, increases electronics
The aperture of expansion valve, this method can be realized without adding pressure sensor in the heat pump system of hot water apparatus to compressor
The determination of compression ratio, and when compression ratio is excessive, increase the aperture of electric expansion valve, to reduce compressor exhaust temperature, mentions
High compressor reliability of operation, to improve reliability and the service life of heat pump system.
Detailed description of the invention
Fig. 1 is the structural schematic diagram in one embodiment of heat pump system of the present invention；
Fig. 2 is the hardware structural diagram of heat pump system control device of the present invention；
Fig. 3 is the flow diagram of heat pump system control method first embodiment of the present invention；
Fig. 4 is the flow diagram of heat pump system control method second embodiment of the present invention；
Fig. 5 is the flow diagram of heat pump system control method 3rd embodiment of the present invention；
Fig. 6 is the flow diagram of heat pump system control method fourth embodiment of the present invention；
Fig. 7 is the flow diagram of the 5th embodiment of heat pump system control method of the present invention.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
The primary solutions of the embodiment of the present invention are: obtaining the current water temperature of environment temperature and water tank；According to the ring
Border temperature and the current water temperature determine the compression ratio of compressor；Judge whether compression ratio is greater than the first preset value；If compression ratio
Greater than first preset value, then controls electric expansion valve and increase aperture.
Due to being not directed to detection relevant parameter in the heat pump system of prior art hot water apparatus to the compression ratio of compressor
Whether it is excessively high be monitored, then will lead to compressor compression ratio exceed its reliability service compression ratio range, to reduce pressure
The reliability of contracting machine influences system operation reliability, reduces lifetime of system.
The present invention provides above-mentioned solution, it is intended to improve compressor reliability of operation, improve the reliability of system
And the service life.
The present invention proposes a kind of hot water apparatus, specifically may include air source hot pump water heater or air source heat pump system etc..
The hot water apparatus specifically includes heat pump system control device 1 and heat pump system 2.
In embodiments of the present invention, referring to Fig.1, heat pump system 2 is swollen including compressor 21, condenser 22, water tank 23, electronics
Swollen valve 24 and evaporator 25 etc..Wherein, the exhaust outlet of compressor 21 is connected to the refrigerant inlet of condenser 22, condenser 22 it is cold
Matchmaker outlet is connected to the refrigerant inlet of electric expansion valve 24, the refrigerant exit of electric expansion valve 24 and the refrigerant inlet of evaporator 25
Connection, the refrigerant exit of evaporator 25 are connected to the gas returning port of compressor 21.Wherein, condenser 22 is set in water tank 23, with right
Water in water tank 23 is heated.
First temperature sensor 01 is installed, to detect the current water temperature in water tank 23 in water tank 23；In evaporator 25
Second temperature sensor 02 is installed, to detect the coil temperature of evaporator 25 on coil pipe；Gas returning port close to compressor 21 is set
There is third temperature sensor 03, to detect the suction temperature of compressor 21, can determine the return-air of compressor 21 according to suction temperature
The degree of superheat；Exhaust outlet close to compressor 21 is additionally provided with the 4th temperature sensor 04, to detect the delivery temperature of compressor 21；Its
In, the exhaust side of compressor 21 is equipped with high-pressure switch 05, for stopping when exhaust lateral pressure is greater than maximum pressure threshold value
The operation of heat pump system；The return side of compressor 21 is equipped with low pressure switch 06, for being less than minimum pressure in return-air lateral pressure
When force threshold, stop the operation of heat pump system；The 5th temperature sensor (not shown) is additionally provided in the place space of heat pump system,
To detect the environment temperature in heat pump system place space.
In embodiments of the present invention, referring to Fig. 2, heat pump system control device 1 includes: processor 1001, such as CPU, is deposited
Reservoir 1002 compresses, timer 1003 etc..Timer 1003 can according to demand count the operation duration of compressor.Storage
Device 1002 can be high speed RAM memory, be also possible to stable memory (non-volatile memory), such as disk
Memory.Memory 1002 optionally can also be the storage device independently of aforementioned processor 1001.
Wherein, processor 1001 respectively with the first temperature sensor, second temperature sensor, third temperature sensor,
Four temperature sensors, high-pressure switch, low pressure switch, the 5th temperature sensor, the connection of the 6th temperature sensor communication,
To obtain the detection data of each sensor, and the operation of each pressure switch.In addition, processor 1001 can also be with compressor, electronics
Expansion valve connection, to control the operation of compressor and the aperture of electric expansion valve.
It will be understood by those skilled in the art that the restriction of the not structure twin installation of apparatus structure shown in Fig. 1, can wrap
It includes than illustrating more or fewer components, perhaps combines certain components or different component layouts.
As shown in Fig. 2, as may include heat pump system control program in a kind of memory 1002 of readable storage medium storing program for executing.
In device shown in Fig. 2, processor 1001 can be used for that the heat pump system stored in memory 1002 is called to control program, and
Execute the correlation step operation of heat pump system control method in following embodiment.
The present invention also provides a kind of heat pump system control methods, applied to the hot water apparatus for being equipped with heat pump system.
Referring to Fig. 3, heat pump system control method first embodiment of the present invention, the heat pump system control method packet are proposed
It includes:
Step S10 obtains the current water temperature of environment temperature and water tank；
Here environment temperature is set on room temperature sensor temperature detected where heat pump system.Step S20, root
The compression ratio of compressor is determined according to the environment temperature and the current water temperature；
Specifically, the ratio of computable ring border temperature and current water temperature, true according to obtained ratio and default regulation coefficient
Determine the compression ratio of compressor, wherein default regulation coefficient here can be analyzed to obtain by a large amount of data.
In addition, step S20 may particularly include in order to keep identified compression ratio more acurrate:
Step S21 determines the condensing pressure of the heat pump system according to the current water temperature, true according to the environment temperature
The evaporating pressure of the fixed heat pump system；
Wherein, mass data analysis can be first passed through in advance is fitted the corresponding relationship determined between water temperature and condensing pressure, and
Corresponding relationship between environment temperature and evaporating pressure.Heat pump system can be determined by current water temperature and preset corresponding relationship
Current condensing pressure can determine the current evaporating pressure of heat pump system by environment temperature and preset corresponding relationship.
Step S22 calculates the compression ratio according to the condensing pressure and the evaporating pressure.
The ratio of condensing pressure and evaporating pressure is the compression ratio of compressor.
Step S30, judges whether the compression ratio is greater than the first preset value；
If the compression ratio is greater than first preset value, S40 is thened follow the steps, if the compression ratio is less than or equal to the
One preset value thens follow the steps S50, step S60.
First preset value can be determined by analyzing the maximum compression ratio of compressor reliability service.
Step S40, control electric expansion valve increase aperture；
The aperture of electric expansion valve is the step number that electric expansion valve is opened.When compression ratio be greater than the first preset value, show to press
The current operational reliability of contracting machine is low, then increases the aperture of electric expansion valve, to reduce the suction temperature of compressor, to reduce pressure
The delivery temperature of contracting machine reduces the compression ratio of compressor, guarantees that compressor operation is in reliable range.
Specifically, can control electric expansion valve according to the size of environment temperature increases aperture.
Step S50, obtain the return-air degree of superheat of the compressor of presently described heat pump system, the delivery temperature of compressor and/
Or the coil temperature of evaporator；
Step S60 adjusts the heat pump according to the return-air degree of superheat, the delivery temperature and/or the coil temperature
The aperture of the electric expansion valve of system.
Specifically, being greater than or equal to its corresponding preset threshold in the return-air degree of superheat, delivery temperature and/or coil temperature
When, it can control electric expansion valve to increase aperture；It is corresponding pre- to be greater than its in the return-air degree of superheat, delivery temperature and/or coil temperature
If when threshold value, electric expansion valve can control to maintain current aperture constant.
A kind of heat pump system control method that the embodiment of the present invention proposes is applied in hot water apparatus, by obtaining environment
Current water temperature in the water tank of temperature and hot water apparatus realizes the determination to compression ratio, and is greater than the first preset value in compression ratio
When, increase the aperture of electric expansion valve, this method can be realized without adding pressure sensor in heat pump system to compressor
The determination of compression ratio increase the aperture of electric expansion valve and when compression ratio is excessive, to reduce compressor exhaust temperature,
Compressor reliability of operation is improved, to improve reliability and the service life of heat pump system.Wherein, guarantee that compression ratio is in normal
When range, according to the return-air degree of superheat, delivery temperature, the aperture of coil temperature adjustment electric expansion valve, to realize various ways
Cooperation guarantees the reliability service of compressor.
Further, it is based on first embodiment, proposes the application heat pump system control method second embodiment.It is real second
It applies in example, may particularly include referring to Fig. 4, step S21:
Step S211 determines condensation temperature according to the current water temperature and the first default heat transfer temperature difference, according to the environment
Temperature and the second default heat transfer temperature difference determine evaporating temperature；
First default heat transfer temperature difference specifically by the condenser of a large amount of test data analysis condensation temperature and water temperature it
Between the temperature difference theoretical value；Second default heat transfer temperature difference specifically by the evaporator of a large amount of test data analysis evaporating temperature
The theoretical value of the temperature difference between the air in environment.
Wherein, different environment temperatures can correspond to the default heat transfer temperature difference of different first, and different water temperatures can also be corresponding with
The default heat transfer temperature difference of different second can obtain the first default heat transfer temperature difference according to environment temperature, obtain the according to current water temperature
Two default heat transfer temperature differences.
Step S212, determines the condensing pressure according to the condensation temperature, determines the steaming according to the evaporating temperature
Send out pressure.
For identical refrigerant, there is fixed quantitative relation, evaporating temperature and steaming between condensation temperature and condensing pressure
It sends out and there is fixed quantitative relation between pressure, therefore can determine its corresponding condensing pressure according to condensation temperature, according to evaporation
Temperature can determine its corresponding evaporating pressure.
In the present embodiment, condensing pressure and evaporating pressure have been determined through the above way, identified condensation pressure can be made
Power and evaporating pressure are more bonded the exchange capability of heat of heat pump system itself, keep determining condensing pressure and evaporating pressure more accurate,
To improve the accuracy of identified compression ratio, progress improves compressor reliability of operation in heat pump system.
Specifically, in a second embodiment, step S212 may particularly include:
Step S212a determines refrigerant type current in the heat pump system；
Step S212b determines the condensing pressure according to the refrigerant type and the condensation temperature, according to the refrigerant
Type and the evaporating temperature determine the evaporating pressure.
There are the corresponding relationship between different condensation temperatures and condensing pressure, different refrigerants for the refrigerant of different refrigerant types
There are the corresponding relationships between different evaporating temperatures and evaporating pressure for the refrigerant of type.It therefore, can be according to working as in heat pump system
Preceding refrigerant type determines corresponding default corresponding relationship, according to identified default corresponding relationship and condensation temperature, evaporation temperature
Degree, determines heat pump system current condensing pressure and evaporating pressure.
Further, it is based on second embodiment, proposes the application heat pump system control method 3rd embodiment.In third reality
It applies in example, includes: referring to Fig. 5, the step S211
Step S211a determines condensation correction factor and evaporation correction factor according to the environment temperature；
Different environment temperatures can correspond to different condensation correction factor and evaporation correction factor.First default heat transfer temperature difference
With the second default heat transfer temperature difference under a certain specified conditions in the temperature difference theoretical value that is measured.Condensation correction factor specifically can be used
Correct the first default heat transfer temperature difference in being adapted to current environment temperature, evaporation correction factor be particularly used in be adapted to it is current
Environment temperature corrects the second default heat transfer temperature difference.
Specifically, multiple temperature can be divided into according to the operating status of compressor at different ambient temperatures for environment temperature
Section, each temperature range all have corresponding condensation correction factor and evaporation correction factor.For example, the first default heat exchange
The temperature difference theoretical value that the temperature difference and the second default heat transfer temperature difference are measured under conditions of specific range of temperatures, specific range of temperatures can
For [2 DEG C, 30 DEG C], then temperature range can be divided into (- ∞, 2 DEG C), [2 DEG C, 30 DEG C] and (30 DEG C ,+∞), (- ∞, 2 DEG C) is right
The condensation correction factor answered is 0.9, evaporation correction factor is 0.8, and [2 DEG C, 30 DEG C] corresponding condensation correction factor is 1, evaporates
Correction factor is 1, and (30 DEG C ,+∞) corresponding condensation correction factor is 1.25, evaporation correction factor is 1.25.
Step S211b is determined according to the condensation correction factor, the first default heat transfer temperature difference and the current water temperature
The condensation temperature, according to the determination of the evaporation correction factor, the second default heat transfer temperature difference and the environment temperature
Evaporating temperature.
Specifically, condensation temperature and evaporating temperature can be calculated by following equation:
Condensation temperature=current water temperature+condensation correction factor * first presets heat transfer temperature difference；
Evaporating temperature=environment temperature+evaporation correction factor * second presets heat transfer temperature difference.
In the present embodiment, since the heat transfer temperature difference of the heat transfer temperature difference of condenser and evaporator can be with the change of environment temperature
And change, environment temperature is higher, and corresponding heat transfer temperature difference also will increase, and environment temperature is lower, corresponding heat transfer temperature difference can reduce, and
Same environment temperature is different to the heat transfer temperature difference of evaporator with condenser, therefore by the above-mentioned means, can further improve institute
The accuracy of determining condensation temperature and evaporating temperature, thus accurately determine compression ratio, further increase compressor operation can
By property.
Further, it is based on any of the above-described embodiment, proposes the application heat pump system control method fourth embodiment.?
In four embodiments, include: referring to Fig. 6, the step S40
Step S41 determines the adjustment amplitude of the aperture of the electric expansion valve according to the environment temperature；
Specifically, being adaptable to influence of the cold medium flux at different ambient temperatures to the suction temperature of compressor, in advance
Environment temperature is divided into multiple temperature ranges, different temperature ranges corresponds to different adjustment amplitudes.Such as can be divided into (-
∞, 7 DEG C), [7 DEG C, 30 DEG C] and (30 DEG C ,+∞) three temperature ranges, (- ∞, 7 DEG C) corresponding adjustment amplitude is 8 steps, [7 DEG C,
30 DEG C] corresponding adjustment amplitude is 16 steps, (30 DEG C ,+∞) corresponding adjustment amplitude is 24 steps.
Step S42 controls the electric expansion valve according to the adjustment amplitude and increases aperture.
Control electric expansion valve increases the aperture of identified adjustment amplitude under current aperture.
In the present embodiment, since the size of environment temperature equally influences whether the temperature and pressure of heat pump system,
Combining environmental temperature determines the adjustment amplitude of the aperture of electric expansion valve through the above way, can make the adjustment of electric expansion valve more
For it is accurate, to further increase the reliability of compressor.
Further, it is based on any of the above-described embodiment, proposes the 5th embodiment of the application heat pump system control method.?
In five embodiments, after reference Fig. 7, step S40 (such as step S41 and step S42), further includes:
Step S70 determines the current compression ratio of the compressor；
Specifically, the current compression ratio of compressor can be determined again according to step S10, step S20 same mode.
Step S80, judges whether the current compression ratio is greater than or equal to the second preset value；
If the current compression ratio is greater than or equal to second preset value, S40 (such as step S41 is returned to step
With step S42)；If the current compression ratio is less than second preset value, S50, step S60 are thened follow the steps.
Wherein, second preset value is less than or equal to first preset value, and such as the first preset value is 8, and second is default
Value is 7, to guarantee that compression ratio adjusted will not be more than the first preset value due to the unstability of system, guarantees that compressor can
By operation.
In the present embodiment, compression ratio is determined and is judged again after increasing electronic expansion valve opening, if compression ratio
More than or equal to the second preset value, then increase the aperture of electric expansion valve again according to step S41, step S42, thus realization pair
Electric expansion valve gradually multiple adjustment guarantees heat pump system heat exchange demand to improve the accuracy of electric expansion valve regulation
When guaranteeing the reliability of compressor simultaneously, and guaranteeing that compression ratio is in normal range (NR), according to the return-air degree of superheat, delivery temperature, disk
Tube temperature degree adjusts the aperture of electric expansion valve, to realize that various ways cooperation guarantees the reliability service of compressor.
Further, in the 5th embodiment, when determining that current compression ratio is less than second preset value, step is executed
Before S50, further includes: when counting the heat pump system to be less than the first of the compression ratio operation of second preset value persistently
It is long, when first duration is greater than or equal to the first preset duration, execute step S50.Specifically, can determine to compress
Start timing when than being less than second preset value, if heat pump system continues to run less than the compression ratio of the second preset value,
Continuous service duration of the compressor to run less than the compression ratio of the second preset value is counted, as the first continuous service duration.?
When first continuous service duration is greater than or equal to the first preset duration (can such as be chosen for 20 seconds), step S50, step are just executed
S60 is further monitored and responds to the other factors for influencing compressor reliability, small in the first continuous service duration
When the first preset duration, S40 is returned to step.In this way, it is ensured that the accuracy of electric expansion valve regulation guarantees
The compression ratio of compressor is located in the range of operation of reliability.
Further, in any of the above-described embodiment, after step S30, determining that it is default that compression ratio is greater than described first
When value, before execution step S30, further includes: count the heat pump system to be greater than the compression ratio of first preset value and run
The second duration；When second duration is greater than or equal to the second preset duration, it is swollen to execute the control electronics
Swollen valve increases the step of aperture.Specifically, timing can be started when determining that compression ratio is greater than first preset value, if heat pump system
System continues then to count what compressor was run with the compression ratio greater than the first preset value to be greater than the compression ratio of the first preset value and run
Continuous service duration, as the second continuous service duration.It is greater than or equal to the second preset duration (such as in the second continuous service duration
Can be chosen for 20 seconds etc.) when, the aperture of electric expansion valve is just directly improved, if the second continuous service duration is default less than second
It is long, S50, step S60 are thened follow the steps, further the other factors for influencing compressor reliability are monitored and are rung
It answers.In this manner, can avoid frequent electric expansion valve adjustment influences the stable operation of heat pump system, guarantee heat pump system
Compressor can be with reliability service simultaneously for stable operation.
In addition, the embodiment of the present invention also proposes a kind of readable storage medium storing program for executing, heat pump is stored on the readable storage medium storing program for executing
System control program, the heat pump system control program realize any reality of heat pump system control method as above when being executed by processor
Apply the correlation step of example.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or the system that include a series of elements not only include those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or system institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including being somebody's turn to do
There is also other identical elements in the process, method of element, article or system.
The serial number of the above embodiments of the invention is only for description, does not represent the advantages or disadvantages of the embodiments.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can be realized by means of software and necessary general hardware platform, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on this understanding, technical solution of the present invention substantially in other words does the prior art
The part contributed out can be embodied in the form of software products, which is stored in one as described above
In storage medium (such as ROM/RAM, magnetic disk, CD), including some instructions are used so that terminal device (it can be mobile phone,
Computer, server, heat pump system, water heater or network equipment etc.) execute method described in each embodiment of the present invention.
The above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (12)
1. a kind of heat pump system control method, which is characterized in that be applied to hot water apparatus, the heat pump system control method includes
Following steps:
Obtain the current water temperature of environment temperature and water tank；
The compression ratio of compressor is determined according to the environment temperature and the current water temperature；
Judge whether the compression ratio is greater than the first preset value；
If the compression ratio is greater than first preset value, controls electric expansion valve and increase aperture.
2. heat pump system control method as described in claim 1, which is characterized in that the control electric expansion valve increases aperture
The step of include:
The adjustment amplitude of the aperture of the electric expansion valve is determined according to the environment temperature；
The electric expansion valve, which is controlled, according to the adjustment amplitude increases aperture.
3. heat pump system control method as described in claim 1, which is characterized in that described according to the environment temperature and described
Current water temperature determines that the step of compression ratio of compressor includes:
The condensing pressure that the heat pump system is determined according to the current water temperature determines the heat pump system according to the environment temperature
The evaporating pressure of system；
The compression ratio is calculated according to the condensing pressure and the evaporating pressure.
4. heat pump system control method as claimed in claim 3, which is characterized in that described to determine institute according to the current water temperature
The condensing pressure for stating heat pump system, the step of determining the evaporating pressure of the heat pump system according to the environment temperature include:
Condensation temperature is determined according to the current water temperature and the first default heat transfer temperature difference, it is default according to the environment temperature and second
Heat transfer temperature difference determines evaporating temperature；
The condensing pressure is determined according to the condensation temperature, and the evaporating pressure is determined according to the evaporating temperature.
5. heat pump system control method as claimed in claim 4, which is characterized in that described according to the current water temperature and first
The step of default heat transfer temperature difference determines condensation temperature, determines evaporating temperature according to the environment temperature and the second default heat transfer temperature difference
Include:
Condensation correction factor and evaporation correction factor are determined according to the environment temperature；
The condensation temperature is determined according to the condensation correction factor, the first default heat transfer temperature difference and the current water temperature,
The evaporating temperature is determined according to the evaporation correction factor, the second default heat transfer temperature difference and the environment temperature.
6. heat pump system control method as claimed in claim 5, which is characterized in that described to determine institute according to the condensation temperature
The step of stating condensing pressure, determining the evaporating pressure according to the evaporating temperature include:
Determine refrigerant type current in the heat pump system；
The condensing pressure is determined according to the refrigerant type and the condensation temperature, according to the refrigerant type and the evaporation
Temperature determines the evaporating pressure.
7. heat pump system control method as described in claim 1, which is characterized in that the control electric expansion valve increases aperture
The step of after, further includes:
Determine the current compression ratio of the compressor；
Judge whether the current compression ratio is greater than or equal to the second preset value；
If the current compression ratio is greater than or equal to second preset value, returns and execute the control electric expansion valve increase
The step of aperture；
Wherein, second preset value is less than or equal to first preset value.
8. heat pump system control method as claimed in claim 7, which is characterized in that described whether to judge the current compression ratio
After the step of more than or equal to the second preset value, further includes:
When the current compression ratio is less than second preset value, the return-air mistake of the compressor of presently described heat pump system is obtained
The coil temperature of temperature, the delivery temperature of compressor and/or evaporator；
According to the return-air degree of superheat, the delivery temperature and/or the coil temperature, the electronics for adjusting the heat pump system is swollen
The aperture of swollen valve.
9. heat pump system control method as claimed in claim 8, which is characterized in that when the current compression ratio is less than described the
When two preset values, the return-air degree of superheat, the delivery temperature of compressor and/or the steaming for obtaining presently described heat pump system compressor
Before the step of sending out the coil temperature of device, further includes:
The heat pump system is counted to be less than the first duration that the compression ratio of second preset value is run；
When first duration is greater than or equal to the first preset duration, the presently described heat pump system pressure of acquisition is executed
The step of coil temperature of the return-air degree of superheat of contracting machine, the delivery temperature of compressor and/or evaporator.
10. heat pump system control method as claimed in any one of claims 1-9 wherein, which is characterized in that the judgement pressure
After the step of whether contracting is than greater than the first preset value, further includes:
When the compression ratio is less than or equal to first preset value, the return-air mistake of presently described heat pump system compressor is obtained
The coil temperature of temperature, the delivery temperature of compressor and/or evaporator；
According to the return-air degree of superheat, the delivery temperature and/or the coil temperature, the electronics for adjusting the heat pump system is swollen
The aperture of swollen valve；And/or
When the compression ratio is greater than first preset value, before the step of control electric expansion valve increases aperture, and also
Include:
The heat pump system is counted to be greater than the second duration that the compression ratio of first preset value is run；
When second duration is greater than or equal to the second preset duration, executes the control electric expansion valve and increase aperture
The step of.
11. a kind of heat pump system control device, which is characterized in that the heat pump system control device includes: memory, processor
And it is stored in the heat pump system control program that can be run on the memory and on the processor, the heat pump system control
Program realizes the step of heat pump system control method as claimed in any one of claims 1-9 wherein when being executed by the processor.
12. a kind of hot water apparatus, which is characterized in that the hot water apparatus includes heat pump system control as claimed in claim 11
Device.
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