CN107576109A - The control method and heat pump of heat pump - Google Patents
The control method and heat pump of heat pump Download PDFInfo
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- CN107576109A CN107576109A CN201710728241.1A CN201710728241A CN107576109A CN 107576109 A CN107576109 A CN 107576109A CN 201710728241 A CN201710728241 A CN 201710728241A CN 107576109 A CN107576109 A CN 107576109A
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Abstract
The present invention provides a kind of control method and heat pump of heat pump, compressor is provided with the refrigerant flow of heat pump, bypass branch is provided between the suction line of compressor and gas exhaust piping, gas by-passing valve is provided with bypass branch, control method includes：After heat pump carries out pattern switching, the real-time low voltage value X of compressor air suction mouth is detected；As working time length of the compressor after pattern switching is different, using different low pressure parameter value Y as criterion with real-time low voltage value X compared with, if low voltage value X is less than low pressure parameter value Y in real time, control the unlatching of gas by-passing valve；If real-time low voltage value X is more than or equal to low pressure parameter value Y, control gas by-passing valve is closed.The present invention is different according to compressor operating duration, with real-time low voltage value compared with and controls the opening and closing of gas by-passing valve using different low pressure parameter values, makes the reliability of heat pump higher, and prevent gas by-passing valve from excessively opening.
Description
Technical field
The present invention relates to heat pump control technology field, and in particular to the control method and heat pump of a kind of heat pump.
Background technology
In recent years, as the improvement of people's living standards, China Middle-north Area will consume a large amount of Coal Energy Sources every year
For heating, caused a large amount of pollutants cause environment constantly to deteriorate therewith, and the exceedingly odious weather such as haze, sandstorm frequently goes out
It is existing.Residential central air- can be on the premise of environmental pollution not be caused, while meets heat supply in winter demand and cooling in summer need
Ask, it will gradually the heating of substitution coal turns into the new selection of people.
Monoblock type frequency conversion residential central air- unit is the source pump for integrating refrigeration and heating, using two-stage enthalpy increasing
Compressor and converter technique, improve the low-temperature heating ability and high-temperature refrigeration ability of air-conditioner set, and expand unit range of operation
And outlet water temperature range, the low temperature heating demand of cold district can be met, and can meets summer high-temperature refrigeration demand, therefore,
It is widely used in increasing high-grade apartment, compound building, advanced villa, unit office building, dining room, shop, public place of entertainment
Deng.
The main frame of residential central air- includes split type outer machine and interior machine, also there is the form of internal-external machine one, interior owner
To be made up of inner side heat exchanger, water pump and auxiliary thermal.Due to the particularity that residential central air- integrates refrigeration, heated,
And require that its compact overall structure, occupation of land are small, therefore, the heat exchanger of interior machine typically changes formula heat exchange using double pipe heat exchanger or plate
Device.Both above-mentioned heat exchangers are due to the design feature of itself, and its internal refrigerant amount of storage is limited, so as to cause to be freezed
In the case of easily cause that refrigerant evaporation is excessively complete, cause as little as less than 0 DEG C of module low pressure during compressor operating, exchange heat
The risk of bursting by freezing be present in device water route runner.
In the prior art, under this pattern the limit value of low-voltage variation typically at -1 DEG C, i.e., compressor normal operation when, when going out
＜ -1 DEG C of the module low pressure of existing compressor, opening module low-voltage variation state, compressor complete machine are shut down.Residential central air- is in mistake
Cross season, carry out refrigeration and heating mode handoff procedure in, when especially switching to refrigeration mode from heating mode, compressor because
Refrigerant lacks particularly pertinent the problem of causing module low pressure too low and enter low-voltage variation state.
In order to solve the above problems, high-low pressure by-passing valve is set up in central air-conditioning system in the prior art, works as pressure
By-passing valve is opened when contracting machine enters low-voltage variation state to improve module low voltage value, improve causes compressor to enter because refrigerant lacks
The problem of entering low-voltage variation state.But in heating starting up's stage, because throttling electronic expansion valve regulation is sluggish, compressor opens
Dynamic frequency changes, and load conversion causes compressor frequency rising etc. to cause the situation of low-voltage module hypotony more severe.Separately
Outside, because compressor rate of change is too fast, when air-conditioning switches to refrigeration mode in heating mode, due to the work of air-conditioning early stage
Process causes most of refrigerant to rest on outside, and therefore, compressor is easier appearance and inhales less than refrigerant and enter low-voltage variation
The problem of state.In view of the above-mentioned problems, merely by method control gas by-passing valve among prior art opening and closing without
Method effectively solves the problems, such as compressor low-voltage variation, and bad usage experience is brought to user.
The content of the invention
In view of this, an object of the present invention is, there is provided one kind can effectively prevent compressor from entering low-voltage variation
State, and prevent the control method for the heat pump that gas by-passing valve excessively opens.
An object of the present invention is, there is provided a kind of heat pump, the heat pump use heat pump system as described above
The control method of system is controlled to compressor operating process.
To reach above-mentioned purpose, on the one hand, the present invention uses following technical scheme：
A kind of control method of heat pump, compressor is provided with the refrigerant flow of the heat pump, in the pressure
Bypass branch is provided between the suction line and gas exhaust piping of contracting machine, gas by-passing valve, institute are provided with the bypass branch
Stating heat pump has heating mode and refrigeration mode, and the control method includes：
After the heat pump carries out pattern switching, the real-time low voltage value X of compressor air suction mouth is detected；
As working time length of the compressor after pattern switching is different, using different low pressure parameter value Y conducts
Criterion, if the low voltage value X in real time is less than the low pressure parameter value Y, controls compared with the low voltage value X in real time
The gas by-passing valve is opened；
If the low voltage value X in real time is more than or equal to the low pressure parameter value Y, the gas by-passing valve is controlled to close.
Preferably, the heat pump carry out pattern switching after and the scheduled time T that works on1Afterwards, compressor is detected
The real-time low voltage value X of air entry.
Preferably, the working time of the compressor is T,
As 0 ＜ T ＜ T1When, the real-time low voltage value X of compressor air suction mouth is not detected；
Work as T1≤T≤T2When, the low pressure reference value as criterion is Y1, to the real-time low voltage value X of compressor air suction mouth
Detected, judge whether the low voltage value X in real time is less than low pressure parameter value Y1, if so, then gas by-passing valve is opened, if it is not, then
Gas by-passing valve is closed；
As T ＞ T2When, the low pressure reference value as criterion is Y2, the real-time low voltage value X of compressor air suction mouth is carried out
Detection, judges whether the low voltage value X in real time is less than low pressure parameter value Y2, if so, then gas by-passing valve is opened, if it is not, then by gas
Port valve is closed；
Wherein, Y1More than Y2。
Preferably, T is worked as1≤T≤T2When, the delivery temperature M of compressor is detected, according to the feelings of the delivery temperature M
Condition is controlled to the compressor.
Preferably, the delivery temperature M is by detecting the temperature of the steam vent of compressor and/or the temperature on compression case top
Obtain.
Preferably, t is worked as1≤M≤t2When, control compressor carries out limit frequency and worked；
Work as t2＜ M ＜ t3When, control compressor carries out frequency reducing work and forbids gas by-passing valve to open；
As M >=t3When, control compressor shutdown.
Preferably, when real-time low voltage value X is less than the low pressure parameter value Y1When, and the delivery temperature t of compressor2＜ M ＜ t3
When, the gas by-passing valve is closed.
Preferably, the t1Value be Z-2 Δs1- 1, unit：DEG C, Δ1Span be 6-8, and/or,
The t2Value be Z-2 Δs2- 1, unit：DEG C, Δ2Span be 4-5, and/or,
The t3Value be Z, Z protects temperature to determine according to compressor air-discharging.
Preferably, the T1Span be 90-150s, and/or,
The T2Span for 450-750s and/or,
The Y1Value be W+2 Δs3+ 1, unit：DEG C, Δ3Span be 3-5；And/or
The Y2Value be W+2 Δs4+ 1, unit：DEG C, Δ4Span is 1-2；
Wherein, W is the system low-voltage protection value of compressor.
To reach above-mentioned purpose, on the other hand, the present invention uses following technical scheme：
A kind of heat pump, compressor is provided with the refrigerant flow of the heat pump, in the air-breathing of the compressor
Bypass branch is provided between pipeline and gas exhaust piping, gas by-passing valve, the heat pump are provided with the bypass branch
With heating mode and refrigeration mode, the heat pump is controlled using the control method of heat pump as described above.
Beneficial effect：The present invention is different according to compressor operating duration, is marked using different low pressure parameter values as judgement
It is accurate compared with real-time low voltage value, control gas by-passing valve to be turned on and off according to comparative result.Meanwhile detect compressor row
Temperature degree or compression case top temperature, the working frequency of compressor is controlled according to the temperature value detected, compared to existing
There is the method for controlling gas by-passing valve to be opened and closed by single condition in technology, make the reliability of heat pump higher, effectively prevent from making
There is low-temperature protection state in heat pattern compressor into refrigeration mode transfer process, and prevents gas by-passing valve from excessively opening.
Brief description of the drawings
By the description to the embodiment of the present invention referring to the drawings, above-mentioned and other purpose of the invention, feature and
Advantage will be apparent from.
Fig. 1 is the air source heat pump system structure chart that the embodiment of the present invention one provides；
Fig. 2 is the flow chart of the control method for the heat pump that the embodiment of the present invention one provides；
Fig. 3 be the embodiment of the present invention one provide from heating mode switch to refrigeration mode after system operation in 200 seconds
Figure；
Fig. 4 be air-conditioner set of the prior art from heating mode switch to refrigeration mode after system operation in 200 seconds
Figure.
In figure：
1st, air-conditioner host；2nd, fan coil；3rd, elastomer connector；4th, thermometer；5th, pressure gauge；6th, stop valve；7th, by-passing valve；
8th, filter；9th, ground；10th, check-valves；11st, flowmeter；12nd, discharging valve；13rd, electric two-way valve；14th, electric T-shaped valve；15、
Ball valve；16th, automatic exhaust steam valve.
Embodiment
Below based on embodiment, present invention is described, it should be understood by one skilled in the art that provided herein
Accompanying drawing is provided to the purpose of explanation, and accompanying drawing is not necessarily drawn to scale.
Unless the context clearly requires otherwise, otherwise entire disclosure is similar with the " comprising " in claims, "comprising" etc.
Word should be construed to the implication included rather than exclusive or exhaustive implication；That is, it is containing for " including but is not limited to "
Justice.
This application discloses a kind of control method of heat pump, when air-conditioning is changed to refrigeration mode process from heating mode
In, multiple Rule of judgment is set, and the real-time low voltage value of compressor air suction mouth is judged compared with Rule of judgment, and according to
Judged result is controlled to the gentle by-passing valve of mode of operation of compressor, obtains the higher heat pump of functional reliability.Make
The gentle by-passing valve of compressor of air-conditioning is controlled with the control method of above-mentioned heat pump, compressor operating mistake can be prevented
Occur low-voltage variation state in journey, and can effectively prevent gas by-passing valve from excessively opening, cause efficiency transition loss.Compared to existing
Have using the method for single control condition control gas by-passing valve opening and closing in technology, safety and reliability is more preferable, the stability of a system
It is higher, compressor is less prone to because of cold medium shortage and the problem of low pressure is too low.
Embodiment one
As shown in figure 1, being typical air source heat pump system, the heat pump control method in the present embodiment is applied in Fig. 1 institutes
On the air source heat pump system shown.Air-conditioner host 1 is arranged on ground 9, and compressor is provided with the refrigerant flow of air-conditioning, pressure
Bypass branch is provided between the suction line and gas exhaust piping of contracting machine, the equipment such as gas by-passing valve are provided with bypass branch, on
State the inside that equipment may be contained within air-conditioner host 1.Above-mentioned air-conditioning system has heating mode and refrigeration mode, and can be in heating mould
Changed between formula and refrigeration mode, when carrying out patten transformation, the mode of operation of compressor is also required to be changed.Enter one
Step, the air entry of compressor is low-pressure state, and exhaust outlet is high pressure conditions, and the real-time low voltage value detected in the present embodiment is logical
Cross and detection acquisition is carried out to compressor air suction mouth using pressure sensor.Also there is water-flow circuit, water circulation in air-conditioner host 1
Loop is connected with running water system.The system also includes multiple fan coils 2, fan coil 2 by pipeline respectively with originally
Water system is connected to form complete water-flow circuit, is provided with electric T-shaped valve 14 and ball valve 15 on some fan coils 2, has
Electric two-way valve 13 is provided with fan coil 2.Check-valves 10, flow are disposed with outside the delivery port of water-flow circuit
Meter 11 and discharging valve 12, check-valves 10 are used to prevent the water in loop from flowing back, and flowmeter 11 is used for the flow for recording pipeline reclaimed water.
Elastomer connector 3, thermometer 4, the stop valve 6 of pressure gauge 5 and filter are disposed with the outside of the water inlet of water-flow circuit
8.Be additionally provided with by-passing valve 7 between water-flow circuit inlet and outlet, when by-passing valve 7 is closed, the import of water-flow circuit with
Need to connect by complete water-flow circuit between outlet；When by-passing valve 7 is opened, side can be passed through between import and outlet
Port valve 7 is connected, and water flows to import by by-passing valve 7 from outlet.It is respectively arranged with inlet pipeline and outlet pipeline automatic
Air bleeding valve 16, automatic exhaust steam valve 16 are used for exhaust when necessary and used.
The heat pump control method in the application is illustrated below by a specific control method embodiment, should
Control method is applied on air source heat pump system as described above.
When progress air-conditioning is changed from heating mode to refrigeration mode, compressor changes operational mode, the control dress of air-conditioning
Put the startup to compressor and the working time is detected, the working time of compressor is T.In the control method of the application,
It is different according to the period where the working time T of compressor, the gentle by-passing valve of compressor is entered using different control methods
Row control, specifically includes following three phases：
First stage, 0 ＜ T ＜ T1
In this stage, T1Span be 90-150s, preferably 120s.The compressor operating time is in 0 ＜ T ＜ 120s
In the range of when, compressor is in startup stage, and this stage control device portion control detection device such as detection means and sensor is not
Any detection operation is carried out to the gentle by-passing valve of compressor.This stage belongs to compressor firm startup stage, and working condition is also unstable
Fixed, the low voltage value at the air entry of compressor is relatively low, and it is common phenomenon that compressor, which enters low-voltage variation state,.But due to
The phase duration is shorter, and can use prior art shielding low-voltage, therefore in this stage without to compressor air suction
The real-time low voltage value X of mouth is detected.Of course for simplify control process, it can also use and be changed from heating mode to refrigeration mould
The mode that is just detected to the real-time low voltage value X of compressor air suction mouth at once after formula, but detect after real-time low voltage value X not
The gentle by-passing valve of compressor is controlled to carry out any action.
Second stage, T1≤T≤T2
Compressor is in high-low pressure establishment stage early stage in this stage, and the real-time low voltage value X of compressor air suction mouth is carried out
Detection, judges whether real-time low voltage value X is less than low pressure parameter value Y1, if so, then gas by-passing valve is opened, if it is not, then gas by-passing valve
Close.
In this stage, T2Span be 450-750s, preferably 600s；Low pressure parameter value Y1For W+2 Δs3+ 1, it is single
Position：DEG C, Δ3Span be 3-5, wherein, parameter W be compressor system low-voltage protection value, different types of compressor
System low-voltage protection value it is different, by taking plate type heat exchanger as an example, its low-pressure system protection value is typically chosen to be -1 DEG C.In this implementation
In example, Y1Preferably 8 DEG C.At this it should be noted that in detection process is carried out to compressor, low pressure parameter value Y1With it is real-time
Low voltage value actually pressure value, but due to being indicated using pressure value in the presence of inconvenience, therefore those of skill in the art are right
It is described when above-mentioned two value is described using the temperature of corresponding refrigerant under the pressure value, therefore low pressure is joined
The unit of numerical value and real-time pressure value all for DEG C, and to be also those skilled in the art can understand such description method.
During compressor operating time 120s≤T≤600s, pressure sensor starts the real-time low pressure to compressor air suction mouth
Value X is detected, and real-time low voltage value X is transferred to the control device of air-conditioning, and control device fills real-time low voltage value X and control
Put the low pressure parameter value Y of middle storage1It is compared.Due to Y1It is preferred that 8 DEG C, therefore, as 8 DEG C of X ＜, gas by-passing valve is opened, and will be pressed
The refrigerant of contracting machine exhaust outlet (i.e. high-pressure side) is delivered to compressor air suction mouth (i.e. low-pressure side) by gas by-passing valve, improves compressor
The pressure of air entry opening position, compressor air suction mouth hypotony is prevented, low-voltage variation state occurs.As 8 DEG C of X ＞, explanation
Pressure at compressor air suction mouth does not have too low, and in relatively stable level, then gas by-passing valve remains off.
Meanwhile in this phase process, while delivery temperature and/or compression case top temperature M to compressor air-discharging hole
Detected, both of which can represent the delivery temperature of compressor, characterize the working condition of compressor.In specific operation process
In, only the delivery temperature in compressor air-discharging hole can be detected, only the temperature on compression case top can also be detected,
In actual mechanical process, because temperature difference between the two is few, therefore, it is identical to give tacit consent to both temperature, is all carried out with M
Represent.Preferably, the delivery temperature to compressor air-discharging hole and compression case top temperature detect simultaneously, using detecting simultaneously
Mode can ensure the accuracys of data, when an above-mentioned sensor in both due to it is unexpected can not obtain data when, separately
One sensor can also obtain data, to complete whole control process, lifting system reliability.As a kind of preferable data
Processing mode, when the temperature difference between the delivery temperature and compression case top temperature in compressor air-discharging hole is differed less than in the range of 3 DEG C,
The numerical value of a relatively high using temperature value can also take the mean both as M numerical value as M numerical value.Obtained by detection
When the temperature M obtained is in different temperatures scope, control device control compressor is operated using different methods, is specifically divided into
Three phases.
(1) t is worked as1≤M≤t2When
Wherein, t1Value be Z-2 Δs1- 1, t2Value be Z-2 Δs2- 1, t1And t2Unit be DEG C that Z is according to compression
Machine exhaust protection temperature determines, it is generally the case that Z is 118 DEG C.In the present embodiment, preferably t1For 103 DEG C, t2For 107 DEG C.
In this stage, the delivery temperature of compressor is slightly higher than normal operating conditions, the control compression of this timed unit
Machine is operated using one-level limit frequency mode of operation.In the case where one-level limits frequency mode of operation, control device will control the work of compressor
Working frequency, the working frequency of compressor is not allowed to continue to increase, now air conditioner refrigeration effect has declined.
(2) t is worked as2＜ M ＜ t3When
Wherein, t3Value be Z, Z protects temperature to determine according to compressor air-discharging, preferably 118 DEG C.
If the delivery temperature or shell top temperature in compressor air-discharging hole were continued to rise within the temperature range of this stage, control
Device control compressor processed carries out two level limit frequency and works and forbid by-passing valve to open.In the case where two level limits frequency mode of operation, control dress
Putting control compressor reduces the work of its working frequency, in addition, it is compressor air suction mouth that gas by-passing valve can not be opened under this stage
Carry out boost operations.
Herein, it should be noted that taken after the delivery temperature and compression case top temperature detection to compressor air-discharging hole
Control method there is priority control compared to the control method determined according to compressor operating time span.For example work as pressure
Force snesor detects real-time 8 DEG C of the low voltage value X ＜ at compressor air suction mouth, and control device control gas by-passing valve is opened；Meanwhile
When detecting that the delivery temperature of compressor is in the range of 107 DEG C of 118 DEG C of ＜ M ＜, when control device forbids the unlatching of gas by-passing valve,
Now, the instruction that gas by-passing valve is closed is performed.
(3) as M >=t3When
This stage, the excessive discharge temperature of compressor, it is meant that compressor operating temperature beyond normal range (NR), this
When, control device needs to control compressor to lose no time to shut down.If control device controls compressor shutdown not in time, then compressor
It will be broken down shutdown because operating temperature is too high.Even if compressor, also can be because of high temperature not because high temperature breaks down shutdown
The compressor lost of life is caused, reduces compressor operating reliability.
Phase III, T ＞ T2
As T ＞ 600s, compressor enters normal operating phase, the compressor air suction mouth that this timed unit will collect
Real-time low voltage value X and the low pressure parameter value Y that is stored in control device2It is compared, Y2Value be W+2 Δs4+ 1, unit：
DEG C, Δ4Span is 1-2, is preferably 4 DEG C in the present embodiment.
When X≤4 DEG C, control device control gas by-passing valve is opened, and the gaseous coolant of exhaust outlet of compressor is delivered into pressure
Contracting machine air entry, the pressure value at compressor air suction mouth is improved, prevent low-voltage variation state from occurring.
As 4 DEG C of X ＞, control device control gas by-passing valve is closed, and is connected between compressor air suction mouth and exhaust outlet.
Low pressure reference value Y1More than low pressure reference value Y2, so as to more effectively prevent low-voltage variation state from occurring, ensure pressure
Contracting machine operation stability and reliability.
If Fig. 3 is controlled down using the control method in the present embodiment, the system operation figure of compressor, Fig. 4 is to adopt
It is controlled down with control method of the prior art, the system operation figure of compressor.Contrasted from both as can be seen that using existing
When having the control method in technology to be controlled, low-voltage variation state occurs in compressor operating afterwards for a period of time, but uses this
When control method in embodiment is controlled, compressor is not in low-voltage variation state, and compressor overall operation is normal.
Further, since the control method in the application is different according to compressor operating time length, there is provided two low pressure
Parameter value, the criterion that different phase opens gas by-passing valve is different, so as to effectively prevent gas by-passing valve turn-on overshoot
Phenomenon occurs.If gas by-passing valve turn-on overshoot, then just have it is more by the increased high-pressure gaseous refrigerant of compressor from
Exhaust outlet of compressor flows to compressor air suction mouth, causes compressor to do many idle works, causes complete machine efficiency low, and this Shen
This phenomenon please but can be effectively avoided to produce.
Embodiment two
Present embodiment discloses a kind of heat pump, compressor is provided with the refrigerant flow of heat pump, in compressor
Suction line and gas exhaust piping between be provided with bypass branch, be provided with gas by-passing valve on bypass branch, heat pump tool
There are heating mode and refrigeration mode.Heat pump in the present embodiment uses the control method in embodiment one to be controlled, because
This, the heat pump in the present embodiment has higher use reliability and security.
For those skilled in the art it is easily understood that on the premise of not conflicting, above-mentioned each preferred scheme can be free
Ground combination, superposition.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for those skilled in the art
For, the present invention can have various changes and change.All any modifications made within spirit and principles of the present invention, it is equal
Replace, improve etc., it should be included in the scope of the protection.
Claims (10)
1. a kind of control method of heat pump, compressor is provided with the refrigerant flow of the heat pump, in the compression
Bypass branch is provided between the suction line and gas exhaust piping of machine, gas by-passing valve is provided with the bypass branch, it is described
Heat pump has heating mode and refrigeration mode, it is characterised in that the control method includes：
After the heat pump carries out pattern switching, the real-time low voltage value X of compressor air suction mouth is detected；
As working time length of the compressor after pattern switching is different, using different low pressure parameter value Y as judgement
Standard is compared with the low voltage value X in real time, if the low voltage value X in real time is less than the low pressure parameter value Y, control described in
Gas by-passing valve is opened；
If the low voltage value X in real time is more than or equal to the low pressure parameter value Y, the gas by-passing valve is controlled to close.
2. the control method of heat pump according to claim 1, it is characterised in that enter row mode in the heat pump
After switching and the scheduled time T that works on1Afterwards, the real-time low voltage value X of compressor air suction mouth is detected.
3. the control method of heat pump according to claim 1 or 2, it is characterised in that during the work of the compressor
Between be T,
As 0 ＜ T ＜ T1When, the real-time low voltage value X of compressor air suction mouth is not detected；
Work as T1≤T≤T2When, the low pressure reference value as criterion is Y1, the real-time low voltage value X of compressor air suction mouth is carried out
Detection, judges whether the low voltage value X in real time is less than low pressure parameter value Y1, if so, then gas by-passing valve is opened, if it is not, then by gas
Port valve is closed；
As T ＞ T2When, the low pressure reference value as criterion is Y2, the real-time low voltage value X of compressor air suction mouth is examined
Survey, judge whether the low voltage value X in real time is less than low pressure parameter value Y2, if so, then gas by-passing valve is opened, if it is not, then gas bypasses
Valve is closed；
Wherein, Y1More than Y2。
4. the control method of heat pump according to claim 3, it is characterised in that work as T1≤T≤T2When, to compressor
Delivery temperature M detected, the compressor is controlled according to the situation of the delivery temperature M.
5. the control method of heat pump according to claim 4, it is characterised in that the delivery temperature M passes through detection
The temperature of the steam vent of compressor and/or the temperature on compression case top obtain.
6. the control method of heat pump according to claim 4, it is characterised in that
Work as t1≤M≤t2When, control compressor carries out limit frequency and worked；
Work as t2＜ M ＜ t3When, control compressor carries out frequency reducing work and forbids gas by-passing valve to open；
As M >=t3When, control compressor shutdown.
7. the control method of heat pump according to claim 6, it is characterised in that
When real-time low voltage value X is less than the low pressure parameter value Y1When, and the delivery temperature t of compressor2＜ M ＜ t3When, by the gas
Port valve is closed.
8. the control method of heat pump according to claim 6, it is characterised in that the t1Value be Z-2 Δs1- 1,
Unit：DEG C, Δ1Span be 6-8, and/or,
The t2Value be Z-2 Δs2- 1, unit：DEG C, Δ2Span be 4-5, and/or,
The t3Value be Z, Z protects temperature to determine according to compressor air-discharging.
9. the control method of heat pump according to claim 3, it is characterised in that the T1Span for 90-
150s, and/or,
The T2Span for 450-750s and/or,
The Y1Value be W+2 Δs3+ 1, unit：DEG C, Δ3Span be 3-5；And/or
The Y2Value be W+2 Δs4+ 1, unit：DEG C, Δ4Span is 1-2；
Wherein, W is the system low-voltage protection value of compressor.
10. a kind of heat pump, compressor is provided with the refrigerant flow of the heat pump, in the air intake duct of the compressor
Bypass branch is provided between road and gas exhaust piping, gas by-passing valve, the heat pump tool are provided with the bypass branch
There are heating mode and refrigeration mode, it is characterised in that the heat pump is using the warm as described in any one of claim 1 to 9
The control method of pumping system is controlled.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN109186145A (en) * | 2018-08-17 | 2019-01-11 | 佛山市澳霆环境设备制造有限公司 | It is a kind of to prevent refrigeration system of the compressor air suction with liquid |
| CN109282425A (en) * | 2018-09-29 | 2019-01-29 | 珠海格力电器股份有限公司 | A kind of self-sensing method of air-conditioning system and its pressure anomaly |
| CN109282516A (en) * | 2018-09-05 | 2019-01-29 | 珠海格力电器股份有限公司 | Air-cooled screw unit and its control method |
| CN112762586A (en) * | 2021-01-21 | 2021-05-07 | 广东积微科技有限公司 | Frequency correction control method for parallel multi-split compressor |
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| CN109282516B (en) * | 2018-09-05 | 2020-06-26 | 珠海格力电器股份有限公司 | Air-cooled screw unit and control method thereof |
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| CN109140840A (en) * | 2018-11-02 | 2019-01-04 | 西安交通大学 | A kind of air conditioner and control method using suction and discharge bypass line |
| CN112762586A (en) * | 2021-01-21 | 2021-05-07 | 广东积微科技有限公司 | Frequency correction control method for parallel multi-split compressor |
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