CN104634029B - Recovery type heat unit liquid ejection control method and system - Google Patents
Recovery type heat unit liquid ejection control method and system Download PDFInfo
- Publication number
- CN104634029B CN104634029B CN201310572023.5A CN201310572023A CN104634029B CN 104634029 B CN104634029 B CN 104634029B CN 201310572023 A CN201310572023 A CN 201310572023A CN 104634029 B CN104634029 B CN 104634029B
- Authority
- CN
- China
- Prior art keywords
- pressure
- superheat
- target exhaust
- expansion valve
- electric expansion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
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
- F24F11/70—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
-
- 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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- 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
- F24F11/89—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention discloses a kind of recovery type heat unit liquid ejection control method and system, wherein method includes：The pressure of inspiration(Pi) of detection compressor and pressure at expulsion, when pressure of inspiration(Pi) and pressure at expulsion exceed default goal pressure range of operation, open hydrojet electric expansion valve, and adjust its aperture to default initial step number, carry out the liquid jet；The delivery temperature of detection compressor, when which is more than or equal to default target exhaust temperature, the aperture of hydrojet electric expansion valve is persistently tuned up from initial step number, until detect delivery temperature adjusting less than stopping after target exhaust temperature；After delivery temperature being detected less than target exhaust temperature, detect the discharge superheat of compressor, when which exceeds default target exhaust degree of superheat scope, adjust the aperture of hydrojet electric expansion valve, within the scope of making discharge superheat be in the target exhaust degree of superheat.The method and system reduce the delivery temperature of compressor, it is to avoid return the generation of liquid, improve unit maintainability.
Description
Technical field
The present invention relates to air-conditioning technical field, more particularly to a kind of recovery type heat unit liquid ejection control method and it is
System.
Background technology
Recovery type heat unit can realize the secondary utilization to heat energy, reduce direct consumption and discharge to the energy.With
The domestic hot-water supply and air of the economic increasingly raising developed rapidly with living standards of the people, public place and personal house
Adjusting has become common requirements.In this context, recovery type heat unit is increasingly subject to the welcome of people.
Recovery type heat unit needs to run in the very wide ambient temperature range, particularly winter, be down to when ambient temperature-
When 10～-15 DEG C, recovery type heat unit heats outlet capacity and accordingly can decline, but when being at this moment hot water demand's highest on the contrary
（Generally hot water effluent's temperature is up to 55 DEG C）, so, unit just works long hours under conditions of high load capacity with high compression ratio, such as
The control of fruit system is unreasonable, liquid just occurs back, the problems such as delivery temperature is higher, so as to substantially reduce the reliability of unit.
There is back the higher problem of liquid, delivery temperature for above-mentioned, the general method using the liquid jet will reservoir
The middle geothermal liquid of outlet pipe is sprayed to compressor, to ensure that delivery temperature is all the time in safe and reasonable scope under various operating modes.But, pass
The aperture or the method for controlling spouting liquid according to delivery temperature merely using increase major loop electric expansion valve of system, because of unit
Range of operation broad, the reason such as real system Parameters variation complexity, it is difficult to reasonably control the liquid jet, so as to cannot be effective
Solve the problems, such as unit be operated in occur under low ambient temperature and high-load condition return liquid and delivery temperature higher, it is impossible to ensure
The reliability of unit high loaded process at low ambient temperatures.
Content of the invention
It is based on this, it is necessary to for the defect and deficiency of prior art, there is provided a kind of recovery type heat unit liquid jet control
Method and system processed, with solve unit be operated in occur under low temperature and high-load condition return liquid and delivery temperature is higher asks
Topic.
The recovery type heat unit liquid ejection control method provided for realizing the object of the invention, comprises the following steps：
S100, detects pressure of inspiration(Pi) and the pressure at expulsion of compressor, when the pressure of inspiration(Pi) and the pressure at expulsion exceed
During default goal pressure range of operation, open hydrojet electric expansion valve, and adjust the aperture of the hydrojet electric expansion valve to
Default initial step number, carries out the liquid jet；
S200, detects the delivery temperature of the compressor, when the delivery temperature is more than or equal to default target exhaust
During temperature, the aperture of the hydrojet electric expansion valve is persistently tuned up from the initial step number, until detecting the aerofluxuss temperature
Degree is adjusted less than stopping after the target exhaust temperature；
S300, after the delivery temperature is detected less than the target exhaust temperature, detects the aerofluxuss of the compressor
The degree of superheat, when the discharge superheat exceeds default target exhaust degree of superheat scope, adjusts the hydrojet electric expansion valve
Aperture, make the discharge superheat within the scope of the target exhaust degree of superheat.
Wherein in one embodiment, step S100 is comprised the following steps：
S110, after the compressor start, detects the pressure of inspiration(Pi) of the compressor；
S120, when the pressure of inspiration(Pi) is less than default target pressure of inspiration(Pi), detects the aerofluxuss of the compressor
Pressure；
S130, when the pressure at expulsion is more than default target exhaust pressure, opens the hydrojet electric expansion valve, and
The aperture for adjusting the hydrojet electric expansion valve carries out the liquid jet to the initial step number.
Wherein in one embodiment, step S300 is comprised the following steps：
S310, when the discharge superheat is more than default target exhaust degree of superheat higher limit, according to the first regulated value,
The aperture of the hydrojet electric expansion valve is tuned up from current step number；
S320, when the discharge superheat is less than default target exhaust degree of superheat lower limit, according to the second regulated value,
The aperture of the hydrojet electric expansion valve is turned down from the current step number.
Wherein in one embodiment, the value of the discharge superheat is equal to the delivery temperature and the pressure at expulsion institute
The difference of corresponding saturation temperature.
Wherein in one embodiment, it is overheated with the target exhaust that first regulated value is equal to the discharge superheat
Difference between degree higher limit；
Second regulated value is equal to the difference between the target exhaust degree of superheat lower limit and the discharge superheat.
Correspondingly, it is to realize recovery type heat unit liquid dispensing system that the object of the invention is provided, including pressure
Detection module, temperature detecting module and discharge superheat detection module；
The pressure detecting module, for detecting pressure of inspiration(Pi) and the pressure at expulsion of compressor, when the pressure of inspiration(Pi) and
When the pressure at expulsion exceeds default goal pressure range of operation, hydrojet electric expansion valve is opened, and adjusts the hydrojet electricity
The aperture of sub- expansion valve carries out the liquid jet to default initial step number；
The temperature detecting module, for detecting the delivery temperature of the compressor, when the delivery temperature is more than or waits
When default target exhaust temperature, the aperture of the hydrojet electric expansion valve is persistently tuned up from the initial step number, until
Detect the delivery temperature to adjust less than stopping after the target exhaust temperature；
The discharge superheat detection module, for detecting the delivery temperature less than the target exhaust temperature
Afterwards, the discharge superheat of the compressor is detected, when the discharge superheat exceeds default target exhaust degree of superheat scope,
The aperture of the hydrojet electric expansion valve is adjusted, within the scope of making the discharge superheat be in the target exhaust degree of superheat.
Wherein in one embodiment, the pressure detecting module includes pressure of inspiration(Pi) detector unit, pressure at expulsion detection
Unit and the first adjustment unit；
The pressure of inspiration(Pi) detector unit, for, after the compressor start, detecting the air-breathing of the compressor
Pressure；
The pressure at expulsion detector unit, for when the pressure of inspiration(Pi) is less than default target pressure of inspiration(Pi), detecting
The pressure at expulsion of the compressor；
First adjustment unit, for when the pressure at expulsion is more than default target exhaust pressure, opening described
Hydrojet electric expansion valve, and adjust the aperture of the hydrojet electric expansion valve and carry out the liquid jet to the initial step number.
Wherein in one embodiment, the discharge superheat detection module includes that the second adjustment unit and the 3rd adjusts list
Unit；
Second adjustment unit, for being more than default target exhaust degree of superheat higher limit when the discharge superheat
When, according to the first regulated value, the aperture of the hydrojet electric expansion valve is tuned up from current step number；
3rd adjustment unit, for being less than default target exhaust degree of superheat lower limit when the discharge superheat
When, according to the second regulated value, the aperture of the hydrojet electric expansion valve is turned down from the current step number.
Wherein in one embodiment, the value of the discharge superheat is equal to the delivery temperature and the pressure at expulsion institute
The difference of corresponding saturation temperature.
Wherein in one embodiment, it is overheated with the target exhaust that first regulated value is equal to the discharge superheat
Difference between degree higher limit；
Second regulated value is equal to the difference between the target exhaust degree of superheat lower limit and the discharge superheat.
Beneficial effects of the present invention：Recovery type heat unit liquid ejection control method and system that the present invention is provided, pass through
Pressure of inspiration(Pi), pressure at expulsion, delivery temperature and discharge superheat during detection compressor operation, jointly controls and adjusts
The aperture of hydrojet electric expansion valve, reduces the delivery temperature of compressor, it is ensured that under different operating modes, and the delivery temperature of compressor begins
Run in the reasonable scope eventually, and effectively prevent back the generation of liquid, improve unit high loaded process at low ambient temperatures
Reliability.
Description of the drawings
In order that the purpose of the recovery type heat unit liquid ejection control method of the present invention and system, technical scheme and advantage
Become more apparent, below in conjunction with concrete drawings and the specific embodiments, to recovery type heat unit liquid jet controlling party of the present invention
Method and system are further elaborated.
Fig. 1 is the flow chart of one embodiment of the recovery type heat unit liquid ejection control method of the present invention；
Fig. 2 is the structure chart of one embodiment of the recovery type heat unit liquid dispensing system of the present invention.
Specific embodiment
Recovery type heat unit liquid ejection control method and the embodiment of system that the present invention is provided, such as Fig. 1 to Fig. 2 institutes
Show.
The present invention provide recovery type heat unit liquid ejection control method one embodiment, as shown in figure 1, including with
Lower step：
S100, detects pressure of inspiration(Pi) and the pressure at expulsion of compressor, when pressure of inspiration(Pi) and pressure at expulsion exceed default mesh
During mark pressure range of operation, hydrojet electric expansion valve is opened, and the aperture of hydrojet electric expansion valve is adjusted to default initial step
Number, carries out the liquid jet.
As a kind of embodiment, the pressure of inspiration(Pi) of compressor is detected respectively by high pressure sensor and low pressure sensor
Power and pressure at expulsion, so that it is determined that the pressure range of operation of compressor.
Goal pressure range of operation is pressure limit when compressor runs well.When the pressure range of operation of compressor is in mesh
When within mark pressure range of operation, then explanation compressor is in safe handling scope, without opening hydrojet electric expansion valve.
According to the analysis after sale to malfunctioning compressor：Compressor damage is mostly due to actual operating mode beyond compression
The operational envelope of machine.Recovery type heat unit liquid ejection control method provided in an embodiment of the present invention detects actual motion
When pressure exceeds the operational envelope of compressor, control hydrojet electric expansion valve is opened, and is improved by reducing delivery temperature
The scroll plate of compressor itself and the working environment of lubricating oil, so as to avoid the high temperature of the high temperature wear and lubricating oil of scroll plate from becoming
Matter, has effectively widened the operational envelope of compressor.
S200, detects the delivery temperature of compressor, when delivery temperature is more than or equal to default target exhaust temperature, will
The aperture of hydrojet electric expansion valve is persistently tuned up from initial step number, until detect after delivery temperature is less than target exhaust temperature stopping
Only adjust.
Target exhaust temperature is delivery temperature during compressor safe operation.
As a kind of embodiment, open after the pressure at expulsion of detection compressor is more than default target exhaust pressure
After hydrojet electric expansion valve, by the delivery temperature of aerofluxuss temperature-sensitive bag detection compressor.
When delivery temperature is detected less than default target exhaust temperature, start to detect discharge superheat；When aerofluxuss temperature
When degree is more than or equal to default target exhaust temperature, the aperture of hydrojet electric expansion valve is persistently tuned up from initial step number, directly
Adjust to delivery temperature is detected less than stopping after target exhaust temperature.
In low ambient temperature and under high leaving water temperature operating mode, the delivery temperature of recovery type heat unit is generally higher（Actually may be used
120～125 DEG C can be reached, has jeopardized the service life of compressor）.Middle geothermal liquid coolant of the present invention using reservoir outlet pipe,
The middle pressure chamber of compressor is injected directly to, liquid refrigerants is evaporated in the middle pressure chamber of compressor, undergoes phase transition heat absorption, can be significant
Reduce delivery temperature（Actual measurement effectively reduces by 15～20 DEG C）, it is ensured that under various operating modes, delivery temperature is all the time in safe and reasonable scope.
S300, after delivery temperature is detected less than target exhaust temperature, detects the discharge superheat of compressor, works as aerofluxuss
The aperture of hydrojet electric expansion valve when the degree of superheat exceeds default target exhaust degree of superheat scope, is adjusted, is made at discharge superheat
Within the scope of the target exhaust degree of superheat.
Recovery type heat unit of the main loop using electric expansion valve throttling, can be because of coolant in system under worst cold case
Efficient Cycle amount reduce and occur delivery temperature rising.Traditional solution is directly to increase major loop electric expansion valve
Aperture, thus inevitably produces back liquid, is likely to result in the scroll plate liquid hammer of compressor.The present invention is by detecting compressor
Discharge superheat, preferably control the aperture of hydrojet electric expansion valve, the electronic expansion valve regulation of major loop is unaffected, energy
The generation of liquid is enough prevented effectively from back.
Recovery type heat unit liquid ejection control method provided in an embodiment of the present invention, by detecting compressor operation process
In pressure of inspiration(Pi), pressure at expulsion, delivery temperature and discharge superheat, jointly control and adjust opening for hydrojet electric expansion valve
Degree, reduces the delivery temperature of compressor, it is ensured that under different operating modes, the delivery temperature of compressor operates in zone of reasonableness all the time
Interior, and effectively prevent back the generation of liquid, improve the reliability of unit high loaded process at low ambient temperatures.
Further, step S100 is comprised the following steps：
S110, after compressor start, detects the pressure of inspiration(Pi) of compressor；
S120, when pressure of inspiration(Pi) is less than default target pressure of inspiration(Pi), detects the pressure at expulsion of compressor；
S130, when pressure at expulsion is more than default target exhaust pressure, opens hydrojet electric expansion valve, and adjusts hydrojet
The aperture of electric expansion valve carries out the liquid jet to initial step number.
Pressure of inspiration(Pi) when default target pressure of inspiration(Pi) is compressor safe operation, default target exhaust pressure are pressure
Pressure at expulsion during contracting machine safe operation.
Further, step S300 is comprised the following steps：
S310, when discharge superheat is more than default target exhaust degree of superheat higher limit, according to the first regulated value, will spray
The aperture of liquid electric expansion valve is tuned up from current step number；
S320, when discharge superheat is less than default target exhaust degree of superheat lower limit, according to the second regulated value, will spray
The aperture of liquid electric expansion valve is turned down from current step number.
Further, the value of discharge superheat is equal to the difference of delivery temperature and the saturation temperature corresponding to pressure at expulsion.
It is preferred that used as a kind of embodiment, the first regulated value is equal in discharge superheat and the target exhaust degree of superheat
Difference between limit value；
Second regulated value is equal to the difference between target exhaust degree of superheat lower limit and discharge superheat.
For clearer, explicitly bright recovery type heat unit liquid ejection control method provided in an embodiment of the present invention
Realize process, be illustrated below：
Definition：P1 is the pressure of inspiration(Pi) of the actual motion of low pressure sensor detection；P2 is the reality of high pressure sensor detection
The pressure at expulsion of operation；Target pressures of inspiration(Pi) of the Pe for compressor safe operation；Target exhausts of the Pc for compressor safe operation
Pressure；T2 is the actual exhaust air temperature of aerofluxuss temperature-sensitive bag detection；Target exhaust temperatures of the Tp for compressor safe operation；T(P2)
Saturation temperature corresponding to the pressure at expulsion of the actual motion of high pressure sensor detection；Δ T1 is in the target of discharge superheat
Limit value；Target lower limits of the Δ T2 for discharge superheat.
When compressor shuts down, hydrojet electric expansion valve is closed；When compressor start operation a period of time（Such as 90 seconds）
Afterwards, hydrojet electric expansion valve follows the steps below control and regulation：
The first step, if continuous a period of time（Such as 5 seconds）Pressure of inspiration(Pi) P1 >=the Pe of actual motion is detected, then hydrojet electricity
Sub- expansion valve is remained turned-off, and does not enter the detection of pressure at expulsion；If continuous a period of time（Such as 5 seconds）Detect actual motion
Pressure of inspiration(Pi) P1 ＜ Pe, then hydrojet electric expansion valve remain turned-off（0B）, enter the detection of pressure at expulsion.
Second step, if continuous a period of time（Such as 5 seconds）Pressure at expulsion P2≤the Pc of actual motion is detected, then hydrojet electricity
Sub- expansion valve is remained turned-off, and does not enter the detection of delivery temperature；If continuous a period of time（Such as 5 seconds）Detect actual motion
Pressure at expulsion P2 ＞ Pc, then hydrojet electric expansion valve first turn on, and adjust to initial step number（Such as 200B）, enter aerofluxuss temperature
The detection of degree.
3rd step, if continuous a period of time（Such as 30 seconds）Detect the delivery temperature T2 >=Tp of actual motion, then will spray
Liquid electric expansion valve is persistently opened greatly, until detecting actual delivery temperature T2 ＜ Tp；If continuous a period of time（Such as 30 seconds）
The delivery temperature T2 ＜ Tp of actual motion are detected, then enters the detection of discharge superheat.
4th step, if continuous a period of time（Such as 30 seconds）Detect discharge superheat T2 T (P2) ＞ of actual motion
Δ T1, then open hydrojet electric expansion valve greatly, opens big step number for T2 T (P2) Δ T1；If continuous a period of time（Such as 30
Second）Discharge superheat T2 T (P2) the ＜ Δ T2 of actual motion are detected, then hydrojet electric expansion valve is turned down, is turned down step number
For Δ T2 T2 T (P2)；If continuous a period of time（Such as 30 seconds）Detect discharge superheat T2 T (P2) of actual motion
In the range of interval [Δ T2, Δ T1], then the aperture that control hydrojet electric expansion valve remains current is constant.
Same inventive concept is based on, correspondingly the embodiment of the present invention also provides a kind of recovery type heat unit liquid jet control
System, as principle and the aforementioned recovery type heat unit liquid ejection control method of this system solve problem realize principle phase
Seemingly, the detailed process for implementing to pass through preceding method of this system is realized, is therefore repeated part and is repeated no more.
Correspondingly, one embodiment for the recovery type heat unit liquid dispensing system that the present invention is provided, such as Fig. 2 institutes
Show, including pressure detecting module 100, temperature detecting module 200 and discharge superheat detection module 300；
Pressure detecting module 100, for detecting pressure of inspiration(Pi) and the pressure at expulsion of compressor, when pressure of inspiration(Pi) and exhaust pressure
When power exceeds default goal pressure range of operation, hydrojet electric expansion valve is opened, and adjusts the aperture of hydrojet electric expansion valve
To default initial step number, the liquid jet is carried out；
Temperature detecting module 200, for detecting the delivery temperature of compressor, when delivery temperature is more than or equal to default mesh
During mark delivery temperature, the aperture of hydrojet electric expansion valve is persistently tuned up from initial step number, until detect delivery temperature being less than
Stop adjusting after target exhaust temperature；
Discharge superheat detection module 300, for, after delivery temperature is detected less than target exhaust temperature, detection is compressed
The discharge superheat of machine, when discharge superheat exceeds default target exhaust degree of superheat scope, adjusts hydrojet electric expansion valve
Aperture, make discharge superheat within the scope of the target exhaust degree of superheat.
Further, pressure detecting module 100 include pressure of inspiration(Pi) detector unit 110, pressure at expulsion detector unit 120 with
And first adjustment unit 130；
Pressure of inspiration(Pi) detector unit 110, for, after compressor start, detecting the pressure of inspiration(Pi) of compressor；
Pressure at expulsion detector unit 120, for when pressure of inspiration(Pi) is less than default target pressure of inspiration(Pi), detecting compressor
Pressure at expulsion；
First adjustment unit 130, for when pressure at expulsion is more than default target exhaust pressure, opening hydrojet electronics swollen
Swollen valve, and adjust the aperture of hydrojet electric expansion valve and carry out the liquid jet to initial step number.
Further, discharge superheat detection module 300 includes the second adjustment unit 310 and the 3rd adjustment unit 320；
Second adjustment unit 310, for discharge superheat be more than the default target exhaust degree of superheat higher limit when, according to
First regulated value, the aperture of hydrojet electric expansion valve is tuned up from current step number；
3rd adjustment unit 320, for when discharge superheat be less than the default target exhaust degree of superheat lower limit when, according to
Second regulated value, the aperture of hydrojet electric expansion valve is turned down from current step number.
Further, the value of discharge superheat is equal to the difference of delivery temperature and the saturation temperature corresponding to pressure at expulsion.
It is preferred that used as a kind of embodiment, the first regulated value is equal in discharge superheat and the target exhaust degree of superheat
Difference between limit value；
Second regulated value is equal to the difference between target exhaust degree of superheat lower limit and discharge superheat.
Recovery type heat unit liquid ejection control method provided in an embodiment of the present invention and system, by detecting compressor fortune
Pressure of inspiration(Pi), pressure at expulsion, delivery temperature and discharge superheat during turning, jointly controls and adjusts hydrojet electronic expansion
The aperture of valve, reduces the delivery temperature of compressor, it is ensured that under different operating modes, the delivery temperature of compressor is operated in rationally all the time
In the range of, and the generation of liquid is effectively prevent back, improve the reliability of unit high loaded process at low ambient temperatures.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more concrete and detailed, but simultaneously
Therefore the restriction to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, some deformations and improvement can also be made, these belong to the guarantor of the present invention
Shield scope.Therefore, the protection domain of patent of the present invention should be defined by claims.
Claims (8)
1. a kind of recovery type heat unit liquid ejection control method, it is characterised in that comprise the following steps：
S100, detects pressure of inspiration(Pi) and the pressure at expulsion of compressor, when the pressure of inspiration(Pi) and the pressure at expulsion are beyond default
Goal pressure range of operation when, open hydrojet electric expansion valve, and adjust the aperture of the hydrojet electric expansion valve to default
Initial step number, carry out the liquid jet；
S200, detects the delivery temperature of the compressor, when the delivery temperature is more than or equal to default target exhaust temperature
When, the aperture of the hydrojet electric expansion valve is persistently tuned up from the initial step number, until it is little to detect the delivery temperature
Stop adjusting after the target exhaust temperature；
S300, after the delivery temperature is detected less than the target exhaust temperature, detects the discharge superheat of the compressor
Degree, when the discharge superheat exceeds default target exhaust degree of superheat scope, adjusts opening for the hydrojet electric expansion valve
Degree, makes the discharge superheat within the scope of the target exhaust degree of superheat, and wherein, the value of the discharge superheat is equal to
The difference of the delivery temperature and the saturation temperature corresponding to the pressure at expulsion.
2. recovery type heat unit liquid ejection control method according to claim 1, it is characterised in that step S100
Comprise the following steps：
S110, after the compressor start, detects the pressure of inspiration(Pi) of the compressor；
S120, when the pressure of inspiration(Pi) is less than default target pressure of inspiration(Pi), detects the pressure at expulsion of the compressor；
S130, when the pressure at expulsion is more than default target exhaust pressure, opens the hydrojet electric expansion valve, and adjusts
The aperture of the hydrojet electric expansion valve carries out the liquid jet to the initial step number.
3. recovery type heat unit liquid ejection control method according to claim 1 and 2, it is characterised in that the step
S300 is comprised the following steps：
S310, when the discharge superheat is more than default target exhaust degree of superheat higher limit, according to the first regulated value, by institute
The aperture for stating hydrojet electric expansion valve is tuned up from current step number；
S320, when the discharge superheat is less than default target exhaust degree of superheat lower limit, according to the second regulated value, by institute
The aperture for stating hydrojet electric expansion valve is turned down from the current step number.
4. recovery type heat unit liquid ejection control method according to claim 3, it is characterised in that described first is adjusted
Value is equal to the difference between the discharge superheat and the target exhaust degree of superheat higher limit；
Second regulated value is equal to the difference between the target exhaust degree of superheat lower limit and the discharge superheat.
5. a kind of recovery type heat unit liquid dispensing system, it is characterised in that including pressure detecting module, temperature detection mould
Block and discharge superheat detection module；
The pressure detecting module, for detecting pressure of inspiration(Pi) and the pressure at expulsion of compressor, when the pressure of inspiration(Pi) and described
When pressure at expulsion exceeds default goal pressure range of operation, hydrojet electric expansion valve is opened, and it is swollen to adjust the hydrojet electronics
The aperture of swollen valve carries out the liquid jet to default initial step number；
The temperature detecting module, for detecting the delivery temperature of the compressor, when the delivery temperature is more than or equal to pre-
If target exhaust temperature when, the aperture of the hydrojet electric expansion valve is persistently tuned up from the initial step number, until detection
Adjust to the delivery temperature less than stopping after the target exhaust temperature；
The discharge superheat detection module, for, after the delivery temperature is detected less than the target exhaust temperature, examining
The discharge superheat of the compressor is surveyed, when the discharge superheat exceeds default target exhaust degree of superheat scope, is adjusted
The aperture of the hydrojet electric expansion valve, makes the discharge superheat within the scope of the target exhaust degree of superheat, wherein,
The value of the discharge superheat is equal to the difference of the delivery temperature and the saturation temperature corresponding to the pressure at expulsion.
6. recovery type heat unit liquid dispensing system according to claim 5, it is characterised in that the pressure detecting
Module includes pressure of inspiration(Pi) detector unit, pressure at expulsion detector unit and the first adjustment unit；
The pressure of inspiration(Pi) detector unit, for, after the compressor start, detecting the pressure of inspiration(Pi) of the compressor；
The pressure at expulsion detector unit, for when the pressure of inspiration(Pi) is less than default target pressure of inspiration(Pi), detection is described
The pressure at expulsion of compressor；
First adjustment unit, for when the pressure at expulsion is more than default target exhaust pressure, opening the hydrojet
Electric expansion valve, and adjust the aperture of the hydrojet electric expansion valve and carry out the liquid jet to the initial step number.
7. the recovery type heat unit liquid dispensing system according to claim 5 or 6, it is characterised in that the aerofluxuss
Degree of superheat detection module includes the second adjustment unit and the 3rd adjustment unit；
Second adjustment unit, for when the discharge superheat is more than default target exhaust degree of superheat higher limit, pressing
According to the first regulated value, the aperture of the hydrojet electric expansion valve is tuned up from current step number；
3rd adjustment unit, for when the discharge superheat is less than default target exhaust degree of superheat lower limit, pressing
According to the second regulated value, the aperture of the hydrojet electric expansion valve is turned down from the current step number.
8. recovery type heat unit liquid dispensing system according to claim 7, it is characterised in that described first is adjusted
Value is equal to the difference between the discharge superheat and the target exhaust degree of superheat higher limit；
Second regulated value is equal to the difference between the target exhaust degree of superheat lower limit and the discharge superheat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310572023.5A CN104634029B (en) | 2013-11-13 | 2013-11-13 | Recovery type heat unit liquid ejection control method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310572023.5A CN104634029B (en) | 2013-11-13 | 2013-11-13 | Recovery type heat unit liquid ejection control method and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104634029A CN104634029A (en) | 2015-05-20 |
| CN104634029B true CN104634029B (en) | 2017-03-15 |
Family
ID=53213060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310572023.5A Active CN104634029B (en) | 2013-11-13 | 2013-11-13 | Recovery type heat unit liquid ejection control method and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104634029B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106766335B (en) * | 2017-01-10 | 2019-03-12 | 珠海格力电器股份有限公司 | Control method for electronic expansion valve, device and heat pump unit |
| CN106871476B (en) * | 2017-02-17 | 2019-08-16 | 珠海格力电器股份有限公司 | The control method and device of a kind of net for air-source heat pump units and its electric expansion valve |
| CN108168171A (en) * | 2017-12-19 | 2018-06-15 | 深圳市深蓝电子股份有限公司 | A kind of hot pump in low temp increasing enthalpy EEV control method and device based on discharge superheat |
| CN110440490A (en) * | 2018-05-02 | 2019-11-12 | 广东Tcl智能暖通设备有限公司 | Gas-supplying enthalpy-increasing control method, storage medium and the control equipment of enthalpy-increasing compressor |
| CN109579348A (en) * | 2018-12-04 | 2019-04-05 | 宁波工程学院 | The multi-functional multi-joint dry type capillary radiation heat pump unit of one kind and its control method |
| CN110388772B (en) * | 2019-07-01 | 2021-02-23 | 重庆美的通用制冷设备有限公司 | Control method and device for electronic expansion valve of heat pump air conditioner and heat pump air conditioner |
| CN113995318B (en) * | 2021-11-05 | 2022-08-02 | 广东美芝制冷设备有限公司 | Cooking appliance control method and control device and cooking appliance |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1148307A2 (en) * | 2000-04-19 | 2001-10-24 | Denso Corporation | Heat-pump water heater |
| US6321549B1 (en) * | 2000-04-14 | 2001-11-27 | Carrier Corporation | Electronic expansion valve control system |
| CN1645017A (en) * | 2003-10-17 | 2005-07-27 | Lg电子株式会社 | Apparatus and method for controlling the super-heating degree in a heat pump system |
| CN201417014Y (en) * | 2009-06-11 | 2010-03-03 | 苏州大学 | Air source heat pump water heater |
| CN102242996A (en) * | 2011-07-05 | 2011-11-16 | 海尔集团公司 | Method for controlling opening of electronic expansion valve in central air-conditioning unit |
| CN102679609A (en) * | 2012-06-07 | 2012-09-19 | 四川同达博尔置业有限公司 | Air-cooled heat pump air conditioner |
| CN102889641A (en) * | 2012-09-12 | 2013-01-23 | 青岛海信日立空调系统有限公司 | Air conditioner used in high-temperature environment and control method |
-
2013
- 2013-11-13 CN CN201310572023.5A patent/CN104634029B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6321549B1 (en) * | 2000-04-14 | 2001-11-27 | Carrier Corporation | Electronic expansion valve control system |
| EP1148307A2 (en) * | 2000-04-19 | 2001-10-24 | Denso Corporation | Heat-pump water heater |
| CN1645017A (en) * | 2003-10-17 | 2005-07-27 | Lg电子株式会社 | Apparatus and method for controlling the super-heating degree in a heat pump system |
| CN201417014Y (en) * | 2009-06-11 | 2010-03-03 | 苏州大学 | Air source heat pump water heater |
| CN102242996A (en) * | 2011-07-05 | 2011-11-16 | 海尔集团公司 | Method for controlling opening of electronic expansion valve in central air-conditioning unit |
| CN102679609A (en) * | 2012-06-07 | 2012-09-19 | 四川同达博尔置业有限公司 | Air-cooled heat pump air conditioner |
| CN102889641A (en) * | 2012-09-12 | 2013-01-23 | 青岛海信日立空调系统有限公司 | Air conditioner used in high-temperature environment and control method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104634029A (en) | 2015-05-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104634029B (en) | Recovery type heat unit liquid ejection control method and system | |
| CN201852386U (en) | Hot fluorine defrosting refrigerating system of air cooler | |
| CN105737389B (en) | A kind of efficient defrost method and device of combination fan speed and pressure control | |
| CN102032648A (en) | Refrigerant flow control method for multi-connected air-conditioning system during heating | |
| CN109631383A (en) | A kind of air-conditioning system and its control method | |
| CN104634009A (en) | Control method for air conditioner circulation device | |
| CN107642879B (en) | Control method and device of air conditioning system and air conditioner | |
| CN203744461U (en) | Control device comprising pump, and cooling system | |
| CN106595126A (en) | Outdoor unit control system, heat pump unit and control method thereof | |
| CN108518892A (en) | A kind of gas supply control device and its control method based on air source heat pump system | |
| CN107687707A (en) | A kind of hot-water heating system and its control method using air-source | |
| CN107894045A (en) | Throttling control method, device and the air conditioner of air-conditioning system | |
| CN107062934B (en) | Energy-saving vacuumizing cooling system and method | |
| CN105627614A (en) | Refrigerating unit and control method and system thereof | |
| CN110762915B (en) | Intelligent defrosting method of refrigeration system based on opening degree of electronic expansion valve | |
| CN107499492A (en) | Handpiece Water Chilling Units and its control method | |
| CN102914107A (en) | Heat energy recovery control method for refrigeration system | |
| CN107965853A (en) | The outdoor unit and control method of three control multi-line systems | |
| KR100698578B1 (en) | Hot water generating apparatus using heat pump | |
| CN108224873B (en) | Refrigerator and water heater integrated machine | |
| CN204202369U (en) | A kind of heat pump baking dehumidifying integrated machine intelligent controller | |
| CN215765835U (en) | Cooling system and refrigeration equipment | |
| CN102777351B (en) | Waste heat recycling device and recycling method of oil-free compressor | |
| CN108224775A (en) | A kind of heat pump-electromagnetic induction composite crude oil heating unit and its control method | |
| CN105066360B (en) | The control method of heat recovery air conditioner hot water machine and wherein outdoor fan |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |