CN109028640A - A kind of air source heat pump and its flow control technique - Google Patents
A kind of air source heat pump and its flow control technique Download PDFInfo
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- CN109028640A CN109028640A CN201810711044.3A CN201810711044A CN109028640A CN 109028640 A CN109028640 A CN 109028640A CN 201810711044 A CN201810711044 A CN 201810711044A CN 109028640 A CN109028640 A CN 109028640A
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- 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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
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- 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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention discloses a kind of air source heat pump and its flow control techniques, including compressor, water-side heat, economizer, finned heat exchanger, pressure sensor, temperature sensor, controller and throttling set, the throttling set includes the main road heating power expansion valve and main road electric expansion valve on the economizer main road, and the economizer bypass is equipped with bypass expansion valve；The throttling set entrance is connected with economizer main road outlet, and the throttling set exit is connected with the first check valve and second one-way valve；The four-way reversing valve for controlling the compressor liquid disengaging is connected on the outlet pressure duct of the compressor；When the operation of unit heating mode and lower outside air temperature, unit controls to expand the refrigerant flow adjustable range of Combined throttling device using main road electric expansion valve as auxiliary flow, and controller directly determines main road electronic expansion valve opening according to outside air temperature and the height of air-conditioner water outlet temperature.
Description
Technical field
The invention belongs to heat pump field of mechanical technique, more particularly, to a kind of air source heat pump and flow control technique.
Background technique
The throttling set of low-temperature air source heat pump unit is usually using heating power expansion valve or electric expansion valve.
For heating power expansion valve by suction superheat come mechanical adjusting refrigerant flow rate, advantage is control stability and reliable
Property it is higher, the disadvantage is that refrigerant flow adjustable range is narrow, suction superheat is higher, be unfavorable for unit operational energy efficiency optimization.If hot
Power expansion valve carrys out type selecting by refrigeration mode working condition, and unit is when especially outside air temperature is lower in a heating mode, due to expansion
Valve specification is too big, and refrigerant flow control is easy imbalance, causes suction superheat and refrigerant flow unstable, be easy to cause pressure
Contracting machine band liquid runs and influences unit heat efficiency and compressor reliability；And if heating power expansion valve is selected by low-temperature heating pattern
Type, when especially outside air temperature is lower under refrigeration mode, since expansion valve inlet outlet pressure differential is smaller and required refrigerant flow is larger,
Expansion valve specification and negotiability are too small, will lead to that evaporating temperature is too low, and refrigerating capacity and refrigeration efficiency are too poor, and compressor air-discharging
Temperature is excessively high, and reliability is poor.
Electric expansion valve is driven with stepper motor, it can be achieved that 0%~100% refrigerant flow accurately controls, and advantage is to adjust
It saves speed fastly and refrigerant flow adjustable range is wide, be conducive to the raising of unit operational energy efficiency；The disadvantage is that controller needs mating pressure
The components such as sensor, temperature sensor, control is complicated and interference and influence factor are more, and control stability and reliability are sensed
Device, which senses precision and control algolithm, to be influenced.When especially outside air temperature is lower in a heating mode, due to by temperature sensor itself
Precision and sensor probe periphery frost influence, and temperature sensing precision is relatively low, and suction superheat calculating error is larger, and by
Inherently smaller in refrigerant flow at this time and required expansion valve opening, error influence will continue to amplify, therefore easily cause stream
Amount control and expansion valve opening imbalance, reliability and stability are lower than heating power expansion valve instead.
Summary of the invention
The present invention for overcome the deficiencies in the prior art, provides a kind of sky for promoting electric expansion valve stability and reliability
Air supply heat pump and its flow control technique.
To achieve the goals above, the invention adopts the following technical scheme: a kind of air source heat pump and its flow control skill
Art, including compressor, water-side heat, economizer, finned heat exchanger, pressure sensor, temperature sensor, controller and section
Device is flowed, the throttling set includes the main road heating power expansion valve and main road electric expansion valve on the economizer main road,
The economizer bypass is equipped with bypass expansion valve；The throttling set entrance is connected with economizer main road outlet, described
Throttling set exit is connected with the first check valve and second one-way valve；It is connected with and is used on the outlet pressure duct of the compressor
Control the four-way reversing valve of the compressor liquid disengaging；When unit heating mode operation and outside air temperature it is lower when, unit with
Main road electric expansion valve controls to expand the refrigerant flow adjustable range of Combined throttling device, controller as auxiliary flow
Main road electronic expansion valve opening is directly determined according to outside air temperature and the height of air-conditioner water outlet temperature；In certain outside air temperature
It is fixed with main road electronic expansion valve opening under the conditions of leaving water temperature, when outside air temperature reduces, required refrigerating capacity flow is reduced,
Main road electronic expansion valve opening will be turned down gradually until completely closing;Low-temperature air source heat pump heating operation and outside air temperature is lower
When, unit directly calculates main road electronic expansion valve opening with the mild outside air temperature of real-time air conditioner water, utilizes main road electronic expansion
Valve makees the control of refrigerant flow auxiliary to expand the refrigerant flow adjustable range of Combined throttling device, on this basis, master
Main road thermal expansion valve opening mechanically is adjusted to control refrigerant flow according to suction superheat size, make refrigerant stream
Amount can preferably match with evaporator load, and stability and reliability are higher, electricity when low outside air temperature can effectively be overcome to heat
Big stability difference defect is vibrated in sub- expansion valve flow control.
Preferably, the economizer main road entrance is equipped with liquid storage device, set on the entrance low pressure line of the compressor
There is gas-liquid separator, the gas-liquid separator is connected with the four-way reversing valve;It is flowed back into compressor by four-way reversing valve
Gas-liquid mixture pass through gas-liquid separator effect, by gas-liquid mixture liquid remove, prevent liquid entry into compression
Compressor is impacted in machine, extends the service life of compressor.
Preferably, the finned heat exchanger is connected with the four-way reversing valve, the finned heat exchanger exit
Equipped with third check valve；The liquid storage device inlet is connected with the 4th check valve and the 5th check valve；Made by third check valve
It is flowed out out of finned heat exchanger by the highly pressurised liquid of finned heat exchanger, highly pressurised liquid is avoided to be back to finned heat exchanger
It is interior；By the 4th check valve and the 5th check valve, prevents the liquid in liquid reserve tank from occurring to flow backwards phenomenon, make the liquid in liquid reserve tank
It is effectively flowed in economizer under the action of check valve, promotes unit reliability of operation.
Preferably, controller can when unit heating mode is run and outside air temperature is higher or refrigeration mode is run
Calculate the practical heat absorption degree of superheat by pressure sensor and temperature sensor, and according to practical suction superheat and target value it
Between deviation automatically control the aperture of main road electric expansion valve;Refrigerant flow and suction can be realized by main road electric expansion valve
The electronic type of the gas degree of superheat accurately controls, and flow adjustment speed is fast, and unit operational energy efficiency is higher.
Preferably, controller will turn down main road electric expansion valve automatically when practical suction superheat is less than target value
Aperture；When practical suction superheat is greater than target value, controller will open big main road electronic expansion valve opening automatically;By to reality
The calculating of border suction superheat adjusts controller to the aperture of electric expansion valve accordingly, enables the controller to more smart
Quasi- is adjusted the aperture of electric expansion valve, promotes unit operational energy efficiency.
Preferably, the gas-liquid separator side is equipped with air inlet, the gas-liquid separator other side is equipped with gas outlet；
Gas-guide tube is equipped in the gas-liquid separator, the gas-guide tube is equipped with thread plate, is additionally provided with reversing plate on the gas-guide tube；Gas
Liquid mixture enters in gas-liquid separator from air inlet, does gas-liquid mixture in separator by the effect of thread plate and revolves
Transhipment is dynamic, and since gas is different from the density of liquid, when liquid flows together with gas mixing, the centrifugal force that liquid is subject to is greater than
Gas, so liquid has the tendency that centrifuge separation, the effect that liquid is attached in screw thread plate face due to gravity are pooled to downwards one
It rises, gas rises to the reversing plate other side by gas-guide tube, and the gas after making gas-liquid separation is discharged from gas outlet, promotes gas-liquid
Separator separating effect.
Preferably, the gas-liquid separator is equipped with top cover, the top cover bottom surface is equipped with link block, the air guide tube top
Portion is equipped with thread groove, and the link block is matched with the thread groove；The top cover bottom surface is equipped with sealing plate, on the sealing plate
Equipped with the first gasket；Gas-guide tube is matched by screw thread with link block, convenient for carrying out maintenance replacement to gas-guide tube；Pass through sealing
The effect of plate makes top cover that top cover and gas-liquid separator be made to form good sealing effect when matching with gas-liquid separator；It is logical
The effect of the first gasket is crossed, the sealing effect of top cover and gas-liquid separator is increased, prevents gas-liquid mixture from dividing in separator
From when leakage phenomenon occurs.
Preferably, the top cover is equipped with the first push plate, first push plate bottom is equipped with push rod, and the push rod is worn
In in the top cover；It is equipped with hydraulic cavities in the link block, fuel reserve tank is equipped with above the hydraulic cavities, is equipped in the fuel reserve tank
Second push plate, second push plate are fixedly connected with the push rod bottom end；Fixation kit is equipped in the hydraulic cavities；It is pushed away by first
The effect of plate can push the second push plate to move down, and the oil liquid in fuel reserve tank can be pushed into hydraulic cavities by the second push plate, enter
Oil liquid in hydraulic cavities pushes fixation kit to be moved to the outside, and forms fixation kit and separator inner wall and cooperates；Pass through liquid
The mode of pressure chamber drives fixation kit to match with separator inner wall, promotes the fixed effect of fixation kit and separator inner wall,
Make fixation kit is more firm to be extruded on separator inner wall, formed and cooperated with sealing plate, forms top cover and separator solid
Fixed cooperation, increases the fixed effect of top cover and separator.
Preferably, first push plate bottom surface is equipped with the first barb, the top cover top surface is equipped with and first barb
The second barb matched, second barb base are equipped with the first sliding block, are equipped with and first sliding block at the top of the top cover
The first sliding groove matched, second barb side are equipped with the first limit plate, and second barb other side is equipped with the second limit
Position plate, second limit plate are equipped with reset spring and support rod component；Pass through the phase interworking of the first barb and the second barb
It closes, makes the first push plate after pushing the second push plate decline, make the first push plate regulation in respective heights, the first push plate is avoided to lose
It is up sprung back after going the pressure on its surface, is back to oil liquid in fuel reserve tank, influence the fixed effect of top cover and separator；Pass through
The effect of first limit plate and the second limit plate plays position-limiting action to the track of the second barb movement, the second barb is avoided to move
The mating reaction of excessive influence the first barb and the second barb；It is played the role of positioning, is prevented to reset spring by support rod component
Reset spring, which bends, influences the reset work of the second barb；It can be by the second barb along runner movement one by reset spring
Set a distance makes the first barb and the second barb lose cooperation, convenient for removing to top cover, thus the convenient maintenance to gas-guide tube
With replacement.
Preferably, cap base is equipped with annular groove, the annular groove bottom surface is equipped with the first magnetic patch, and first magnetic patch is equipped with
Second gasket；The second magnetic patch is equipped in the annular groove, second magnetic patch top surface is equipped with third gasket, and bottom surface is equipped with the 4th
Gasket；Second magnetic patch two sides are equipped with the second sliding block, and the annular groove inner wall is equipped with and matches with second sliding block
Second sliding slot；First magnetic patch repels each other with the second magnetic patch magnetism；After top cover and separator are completed to assemble, separator side
Wall is inserted into annular groove, and the first magnetic patch and the second magnetic patch make second since the effect of separator and top cover contacts with each other to together
Gasket and third gasket contact with each other to together, to playing sealing function in sliding slot；Pass through the 4th gasket and separator
Side wall is in contact, and good sealing effect is played in the junction for the second magnetic patch and separator sidewall, avoids the gas in separator
Body is revealed from annular groove；The magnetism repelled each other by the first magnetic patch and the second magnetic patch keeps the second gasket and third gasket mutual
The first magnetic patch generates thrust to the second magnetic patch when contact, presses the 4th gasket on separator sidewall, and it is close to promote the 4th
The sealing effect of packing and separator sidewall avoids gas-liquid separator that leakage phenomenon occurs.
The invention has the following advantages that unit is when low-temperature air source heat pump heating operation and lower outside air temperature with real-time
The mild outside air temperature of air conditioner water directly calculates main road electronic expansion valve opening, makees refrigerant flow using main road electric expansion valve
Auxiliary is controlled to expand the refrigerant flow adjustable range of Combined throttling device, on this basis, mainly according to suction superheat
Degree size come mechanically adjusts main road thermal expansion valve opening to control refrigerant flow, enable refrigerant flow preferably with steaming
Hair device load matches, and stability and reliability are higher, flow of electronic expansion valve control when low outside air temperature can effectively be overcome to heat
Damping swings big stability difference defect.
Detailed description of the invention
Fig. 1 is the system flow chart of the embodiment of the present invention 1.
Fig. 2 is the structural schematic diagram of gas-liquid separator in the embodiment of the present invention 1.
Fig. 3 is the structural schematic diagram of gas-liquid separator top cover in the embodiment of the present invention 1.
Fig. 4 is enlarged drawing at the A in Fig. 3.
Fig. 5 is enlarged drawing at the B in Fig. 3.
Fig. 6 is enlarged drawing at the C in Fig. 3.
Fig. 7 is enlarged drawing at the D in Fig. 3.
Fig. 8 is the structural schematic diagram of seal assembly in gas-liquid separator in the embodiment of the present invention 1.
Fig. 9 is the structural schematic diagram of support rod component in gas-liquid separator in the embodiment of the present invention 1.
Figure 10 is the structural schematic diagram of gas-liquid separator in the embodiment of the present invention 2.
Figure 11 is enlarged drawing at the E in Figure 10.
Specific embodiment
In order to make those skilled in the art better understand the present invention program, below in conjunction in the embodiment of the present invention
Attached drawing, the technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
A part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The model that the present invention protects all should belong in member's every other embodiment obtained without making creative work
It encloses.
Embodiment 1:
As shown in figs 1-9, a kind of air source heat pump and its flow control technique, including compressor 1, water-side heat 3, economizer
7, finned heat exchanger 14, pressure sensor, temperature sensor, controller and throttling set, the throttling set include being set to
Main road heating power expansion valve 9 and main road electric expansion valve 10 on 7 main road of economizer, 7 bypass of economizer are equipped with auxiliary
Road expansion valve 8；The throttling set entrance is connected with 7 main road of economizer outlet, and the throttling set exit is connected with
First check valve 11 and second one-way valve 13；It is connected on the outlet pressure duct of the compressor 1 for controlling the compressor 1
The four-way reversing valve 2 of liquid disengaging；Main road electric expansion valve 10 in the Combined throttling device due to being driven with stepper motor,
Refrigerant flow adjustable range is wide and adjustment speed is fast, be suitable for low-temperature air source heat pump refrigeration, heat different operational modes and
Different chamber's outer gas mildly becomes expansion valve inlet outlet pressure differential and refrigerant flow variation range under the conditions of air conditioner load, emptying water transfer temperature
Larger feature；Main road heating power expansion valve 9 in the Combined throttling device is (to depend on its temperature sensing package by pressure above diaphragm
The suction temperature sensed) and diaphragm following pressure (i.e. pressure of inspiration(Pi)) between pressure difference come mechanical variable expansion valve aperture
And refrigerant flow, have the characteristics that stability and high reliablity, meanwhile, diaphragm upper and lower pressure difference is essentially dependent on suction
The gas degree of superheat, i.e. main road heating power expansion valve 9 are by suction superheat come mechanical control refrigerant flow；Throttling set uses
Heating power expansion valve and electric expansion valve combination play throttling action jointly, stream fast using electric expansion valve adjustment speed
Measure that adjustable range is wide and control is accurate and the characteristics of heating power expansion valve mechanical flow control stability and high reliablity.
The 7 main road entrance of economizer is equipped with liquid storage device 6, and the entrance low pressure line of the compressor 1 is equipped with gas-liquid
Separator 4, the gas-liquid separator 4 are connected with the four-way reversing valve 2；The finned heat exchanger 14 commutates with the four-way
Valve 2 is connected, and 14 exit of finned heat exchanger is equipped with third check valve 15；6 inlet of liquid storage device is connected with the 4th
Check valve 5 and the 5th check valve 12.
When refrigeration mode is run, the high temperature and high pressure gas that compressor 1 is discharged enters finned unit through four-way reversing valve 2
Heat exchanger 14 is condensed into highly pressurised liquid after carrying out heat convection discharge amount of heat with the relatively low outdoor air of temperature, later
Enter economizer 7 by check valve 12, liquid storage device 6, with high-pressure sub-cooled liquid after 8 reducing pressure by regulating flow of economizer bypass expansion valve
Medium temperature and medium pressure liquid refrigerant exchange heat, discharge heat after be cooled to high-pressure sub-cooled liquid, later pass through main road heating power
The throttling set reducing pressure by regulating flow that expansion valve 9 and main road electric expansion valve 10 are composed, becomes the gas-liquid mixed system of low-temp low-pressure
The laggard water inlet side heat exchanger 3 of cryogen absorbs the relatively high air conditioner water heat of temperature, low by being evaporated to after air conditioner water cooling down
It calms the anger body, comes back to compressor 1 after four-way reversing valve 2, gas-liquid separator 4 again later and be compressed to high temperature and pressure gas again
Body recycles repeatedly.
When heating mode is run, the high temperature and high pressure gas that compressor 1 is discharged is changed through four-way reversing valve 2 into water inlet side unit
Hot device 3 and the relatively low air conditioner water of temperature carry out heat convection, and discharge amount of heat carries out air conditioner water cold after heating heating
Highly pressurised liquid is congealed into, enters economizer 7 by check valve 5, liquid storage device 6 later, passes through economizer bypass with high-pressure sub-cooled liquid
Medium temperature and medium pressure liquid after 8 reducing pressure by regulating flow of expansion valve exchanges heat, and is cooled to high-pressure sub-cooled liquid, Zhi Houtong after discharging heat
The throttling set reducing pressure by regulating flow that main road heating power expansion valve 9 and main road electric expansion valve 10 are composed is crossed, low-temp low-pressure is become
Enter finned heat exchanger 14 after gas-liquid mixed refrigerant, is evaporated to low-pressure gas after absorbing outdoor air heat, passes through again later
Compressor 1 is come back to after four-way reversing valve 2, gas-liquid separator 4 and is compressed to high temperature and high pressure gas again, is followed repeatedly
Ring.
When unit heating mode is run and outside air temperature is higher or refrigeration mode is run, controller passes through pressure sensing
Device detects pressure of inspiration(Pi), detects suction temperature by temperature sensor, controller calculates the practical heat absorption degree of superheat (air-breathing in turn
The corresponding saturation temperature of temperature-pressure of inspiration(Pi)), master is automatically controlled according to the deviation between practical suction superheat and target value
The aperture of road electric expansion valve 10.Illustrate that Combined throttling device is changed for feedwater side when practical suction superheat is less than target value
Hot device 3(refrigeration mode) or finned heat exchanger 14(heating mode) refrigerant flow it is bigger than normal, controller will turn down master automatically
10 aperture of road electric expansion valve.Illustrate that Combined throttling device exchanges heat for feedwater side when practical suction superheat is greater than target value
Device 3(refrigeration mode) or finned heat exchanger 14(heating mode) refrigerant flow it is less than normal, controller will open big main road automatically
10 aperture of electric expansion valve, therefore the electronic type essence of refrigerant flow and suction superheat can be realized by main road electric expansion valve 10
Really control, flow adjustment speed is fast, and unit operational energy efficiency is higher.
When the operation of unit heating mode and lower outside air temperature, unit is using main road electric expansion valve 10 as auxiliary flow
Amount control to expand the refrigerant flow adjustable range of Combined throttling device, controller no longer pass through detection temperature sensor,
Pressure sensor and practical suction superheat is calculated to control 10 aperture of main road electric expansion valve, and according to outside air temperature and air-conditioning
The height of leaving water temperature directly determines 10 aperture of main road electric expansion valve, certain outside air temperature and leaving water temperature under the conditions of
10 aperture of main road electric expansion valve is fixed, and when outside air temperature reduces, required refrigerating capacity flow is reduced, main road electric expansion valve
10 apertures gradually will be turned down or even be completely closed.
On the basis of carrying out auxiliary flow control using main road electric expansion valve 10, unit is mainly big according to suction superheat
It is small mechanically to adjust 9 aperture of main road heating power expansion valve to control refrigerant flow, when the system that Combined throttling device is supplied
When cryogen flow is less than normal relative to evaporator load, below 4 inlet pressures of gas-liquid separator, that is, 9 diaphragm of main road heating power expansion valve
Outer balance pipe pressure will be relatively low, and ties up the suction temperature that 9 thermometer bulb of main road heating power expansion valve in air-breathing tube outer surface is sensed
Then will be higher, cause Simultaneous Pressure above expansion valve film higher, therefore the pressure above 9 diaphragm of main road heating power expansion valve with lower section
Difference increases, and expansion valve film is caused to move down, therefore the refrigerant flow of 9 aperture of main road heating power expansion valve and supply evaporator will increase
To adapt to evaporator load；Conversely, when the refrigerant flow that throttling set is supplied is bigger than normal relative to evaporator load, gas-liquid
Outer balance pipe pressure below 4 inlet pressures of separator, that is, 9 diaphragm of main road heating power expansion valve will be higher, and ties up in air intake duct appearance
The suction temperature that 9 thermometer bulb of main road heating power expansion valve in face is sensed then will be relatively low, causes to expand Simultaneous Pressure above valve film
It is relatively low, therefore reduced above 9 diaphragm of main road heating power expansion valve with the pressure difference of lower section, cause expansion valve film to move up, therefore main road is warm
The refrigerant flow of 9 aperture of power expansion valve and supply evaporator adapts to evaporator load by reducing.
It can be seen that unit is mild with real-time air conditioner water when low-temperature air source heat pump heating operation and lower outside air temperature
Outside air temperature directly calculates 10 aperture of main road electric expansion valve, makees refrigerant flow auxiliary control using main road electric expansion valve 10
It makes to expand the refrigerant flow adjustable range of Combined throttling device, and on this basis, it is mainly big according to suction superheat
It is small come mechanically adjust 9 aperture of main road heating power expansion valve to control refrigerant flow, enable refrigerant flow preferably with evaporation
Device load matches, and stability and reliability are higher, and flow of electronic expansion valve controls when low outside air temperature can effectively be overcome to heat
Vibrate big stability difference defect.
4 side of gas-liquid separator is equipped with air inlet 43, and 4 other side of gas-liquid separator is equipped with gas outlet 42；Institute
It states and is equipped with gas-guide tube 44 in gas-liquid separator 4, the gas-guide tube 44 is equipped with thread plate 441, is additionally provided on the gas-guide tube 44
Reversing plate 444；Reversing plate is obliquely installed, and reversing plate seals to gas-guide tube top；Make air inlet by reversing plate and goes out
Port separates, and avoids gas-liquid mixture from entering the rear unprocessed discharge directly from gas outlet from air inlet, promotes separator
To the treatment effect of gas-liquid mixture；Point water plate 45 is equipped with below gas-guide tube 44,4 bottom of gas-liquid separator is equipped with storage chamber 46,
46 bottom of storage chamber is equipped with automatic drain valve 47；Low-pressure gas-liquid mixture is entered in separator by air inlet, is entered point
It is blocked and can not up be moved by reversing plate from the gas-liquid mixture in device, gas-liquid mixture is along the thread plate on gas-guide tube side wall
It moves down, so that gas-liquid mixture is made rotating motion in separator by the effect of thread plate, it is close due to gas and liquid
Degree is different, and when liquid flows together with gas mixing, the centrifugal force that liquid is subject to is greater than gas, so liquid has centrifuge separation
Tendency, liquid are attached in screw thread plate face since the effect of gravity pools together downwards, fall via point water plate in storage chamber
Interior, after reaching a constant volume in storage chamber, the water in storage chamber is discharged out of storage chamber for automatic drain valve unlatching；Gas-guide tube
Side wall is equipped with venthole 445, and venthole 445 is set to 444 top of reversing plate；The gas for arriving separator bottom down enters air guide
It is risen in pipe at the top of separator, so that gas is entered the other side of reversing plate by the effect of venthole, after making gas-liquid separation
Gas from gas outlet drain separator, improve gas-liquid separation efficiency.
The gas-liquid separator 4 is equipped with top cover 41, and 41 bottom surface of top cover is equipped with link block 412, the gas-guide tube 44
Top is equipped with thread groove 442, and the link block 412 is matched with the thread groove 442；41 bottom surface of top cover is equipped with sealing plate
414, the sealing plate 414 is equipped with the first gasket 4141；First gasket 4141 is made of elastic material, can be rubber material
Matter；Sealing plate 414 is annular, and 414 diameter of sealing plate is greater than separator sidewall diameter, and 4141 thickness of the first gasket is greater than sealing
The spacing of plate and separator sidewall；When top cover and separator cooperate, separator sidewall is encased on the inside of sealing plate, the
One gasket is squeezed under the action of separator sidewall and sealing plate, so that the first gasket is generated deformation and is increased the first sealing
The contact area of pad and separator sidewall promotes the sealing effect of top cover and divider；412 bottom of link block is equipped with and thread groove
442 screw threads matched, gas-guide tube 44 are fixedly connected on link block by the cooperation of thread groove and link block；Connected by screw thread
Gas-guide tube and link block are attached by the mode connect, convenient for being dismounted to gas-guide tube, it is convenient to gas-guide tube carry out maintenance and
Replacement.
The top cover 4 is equipped with the first push plate 411, and 411 bottom of the first push plate is equipped with push rod 413, the push rod 413
It is arranged in the top cover 41；Movable chamber 417 is equipped in top cover 41, push rod 413 is arranged in movable chamber 417, sets on push rod 413
There is limited block 4132, limited block 4132 is set in movable chamber 417, and limited block 4132 can carry out up and down along 417 inner wall of movable chamber
It is mobile；The through-hole diameter of movable chamber 417 is less than 4132 diameter of limited block, and limited block 4132 can not be skidded off out of movable chamber 417, leads to
The cooperation for crossing movable chamber 417 and limited block 4132 does restriction effect to the maximum distance of pushrod movement；It is set in the link block 412
There are hydraulic cavities 4122, fuel reserve tank 4121 is equipped with above the hydraulic cavities 4122, is equipped with the second push plate in the fuel reserve tank 4121
4133, second push plate 4133 is fixedly connected with 413 bottom end of push rod, and 4121 bottom surface of shoe cream room is equipped with partition 4125, partition
4125 are equipped with multiple oil outlets 41251；Fixation kit 4123 is equipped in the hydraulic cavities 4122, fixation kit one end is set to liquid
Press intracavitary, fixation kit is moved under the action of can be hydraulic in hydraulic cavities；Fixation kit 4123 includes being set in hydraulic cavities
Movable plate 41231, the connecting rod 41232 that is fixedly connected with movable plate 41231 and the fixation for being fixed on 41232 other end of connecting rod
Plate 41233,41231 diameter of movable plate are matched with hydraulic cavities diameter, and movable plate 41231 can be moved along hydraulic cavity wall
It is dynamic；41233 top surface of fixed plate is equipped with non-slip mat 41234, and non-slip mat 41234 is made of elastic material, can be rubber material, prevent
41234 surface of skidding be equipped with a plurality of lines, increase non-slip mat 41234 and separator sidewall frictional force, promotion top cover with separate
The fixed effect of device.
When top cover to be assembled at the top of separator, sealing plate and separator sidewall mutually form cooperation, make the first sealing
Pad seals to the junction of top cover and separator；The first push plate is pushed down, makes the first push plate that push rod be driven to transport down
Dynamic, limited block moves to movable chamber bottom, and the second push plate moves to shoe cream room bottom, and the second push plate will be stored up when moving down
Oil liquid in oil pocket is pressed into hydraulic cavities by oil outlet, and oil liquid is entered in hydraulic cavities and moved toward hydraulic cavities two sides, in oil
Movable plate is pushed to move toward hydraulic cavities two sides under the action of pressure, movable plate movement progress fixed plate is transported toward separator sidewall direction
It is dynamic, so that fixed plate is in contact with separator sidewall, fixed plate, which squeezes non-slip mat, is adjacent to non-slip mat mutually with separator sidewall, fixed
Plate links together top cover and separator under the mating reaction with sealing plate, promotes the connection effect of top cover and separator.
First push plate, 411 bottom surface is equipped with the first barb 4111, and the first barb is two groups, is respectively arranged on the first push plate bottom
Face two sides, 41 top surface of top cover are equipped with the second barb 4161 matched with first barb 4111, the first barb bottom surface
It is arc-shaped structure with the second barb top surface；Second barb, 4161 bottom is equipped with the first sliding block 4163, the top cover 41
Top is equipped with the first sliding groove 415 matched with first sliding block 4163, and the second barb 4161 can pass through the first sliding block 4163
Effect with first sliding groove 415 is horizontally moved；Second barb, 4161 side is equipped with the first limit plate 4162, and described the
Two barbs, 4161 other side is equipped with the second limit plate 4164, is fallen by the first limit plate 4162 and the second limit plate 4164 to second
Hook 4161 plays position-limiting action, avoids the second barb 4161 from skidding off out of first sliding groove 415 when moving horizontally, causes the second barb
Damage；Second limit plate 4164 is equipped with reset spring 4165 and support rod component 4166；Support rod component 4166 wraps
Include the support base 41661 for being fixed on 4111 side of the second barb and the motion bar 41662 being arranged in support base 4166, support base
Cavity 416611 is equipped in 41661,41662 one end of motion bar is set in cavity 416611, and motion bar 41662 can be along cavity
416611 inner walls slide up and down, and by the mutual cooperation of support base 4166 and motion bar 41662, play guiding to reset spring 4165
Effect avoids reset spring 4165 from bending when shrinking, influences the service life of reset spring；First push plate, 411 bottom
It is fixed with support spring 4131, support spring 4131 is sheathed on push rod 413.
After top cover and separator, which are formed, to be cooperated, pushes the first push plate and the second push plate is pushed to move down, limited block is being transported
It moves and limits the first push plate continuation behind movable chamber bottom and move down, support spring stress be in squeezed state, support bullet at this time
Spring bottom end is in contact with top cover top surface；First barb with the first push plate decline when decline therewith, when the first barb bottom surface with
When second barb top surface is in contact, the first barb bottom surface moves down along the second barb top surface, pushes the second barb toward push rod
The movement of one side direction, the first sliding block slides along first sliding groove, and the second barb is driven to move horizontally, and the first barb is made to enter the
The two barb other sides form the first barb and the second barb and cooperate, play fixed function to the first push plate, consolidate the first push plate
It is scheduled on the position of decline, the first push plate is avoided to go up to influence the fixed work of fixation kit and separator under the action of oil pressure
With；When needing to separate top cover with separator, the second barb is squeezed toward push rod direction, shrinks reset spring, motion bar contracting
Enter into support base, the second barb is made to disengage with the first barb, the first push plate is after losing fixed function in support spring
Under the action of up move, drive the second push plate up move, the oil liquid in hydraulic cavities is drawn into fuel reserve tank, fixation kit
It is recycled inside under the action of hydraulic, so that fixed plate is disengaged the cooperation with separator sidewall, convenient for taking top cover from separator
Under.
41 bottom of top cover is equipped with annular groove 418, and when top cover and separator are formed when cooperating, separator sidewall top is set to
In annular groove 418；418 bottom surface of annular groove is equipped with the first magnetic patch 4181, and first magnetic patch 4181 is equipped with the second gasket
41811；The second magnetic patch 4183 is equipped in the annular groove 418,4183 top surface of the second magnetic patch is equipped with third gasket 41834,
Bottom surface is equipped with the 4th gasket 41832；Second magnetic patch, 4183 two sides are equipped with the second sliding block 41831,418 inner wall of annular groove
It is equipped with the second sliding slot 4182 matched with second sliding block 41831；4182 bottom of second sliding slot is equipped with buffer spring
41821, damping effect is played to the second magnetic patch by buffer spring 41821, the second magnetic patch is avoided directly to make the second sliding block when declining
It pounds and falls in second sliding slot bottom, shield to the second sliding block；First magnetic patch 4181 and 4183 magnetic of the second magnetic patch
Property is repelled each other；Second gasket 41811, third gasket 41834 and the 4th gasket 41832 are that elastic material is made, and can be
Rubber material, the second magnetic patch bottom surface are equipped with groove 41833, and the 4th gasket 41832 is equipped with for top and matches with groove 41833
Convex block, when the 4th gasket 41832 and the second magnetic patch 4181 are thought of as cooperation, convex block is inserted into groove 41833；By convex
The cooperation of block and groove makes the 4th gasket is stronger to be mounted on the second magnetic patch bottom, and passes through the 4th gasket for second
Magnetic patch bottom wraps, and so that separator sidewall is preferably formed sealing cooperation with the second magnetic patch, avoids separator sidewall and sliding slot
Between there is gap and cause gas leakage phenomenon.
When top cover to be assembled on separator, separator sidewall is encased in annular groove, makes sealing plate and separator side
Wall forms cooperation, and the first magnetic patch and the second magnetic patch are close to each other under the action of top cover gravity and separator sidewall, make the first magnetic
The third gasket on the second gasket and the second magnetic patch on block contacts with each other to form cooperation, passes through the second gasket and third
The cooperation of gasket increases the sealing effect of sliding slot to sealing in annular groove；Repelled each other by the first magnetic patch and the second magnetic patch
Magnetic effect, when the second gasket and third gasket contact with each other, the first magnetic patch generates the power repelled each other to the second magnetic patch,
4th gasket is pressed on separator sidewall top, increases the sealing effect of the 4th gasket and separator sidewall, avoids sending out
Raw gas leak phenomenon；After top cover and separator separately cooperate, the second magnetic patch is sliding along second under the action of the first magnetic patch magnetic force
Slot moves down, makes to avoid the first magnetic patch and the second magnetic patch long on the second slide block movement to the support spring of second sliding slot bottom
The contact of time impacts the magnetism of magnetic patch.
Embodiment 2:
As shown in figs. 10-11, the present embodiment the difference from embodiment 1 is that: the point water plate 45 is removably connected to the gas
On liquid/gas separator 4；By the setting of point water plate, it is filtered the liquid for falling to separator bottom by point water plate, by liquid
In impurity filter out in point water plate, avoid liquid from being fallen in storage chamber under direct with impurity and cause the stifled of storage chamber water outlet
Plug；Easily point water plate can be taken out out of separator by being detachably connected for point water plate, convenient for the impurity in point water plate
It is cleared up, extends the service life of separator.
4 inner wall of gas-liquid separator is equipped with the mounting blocks 452 for installing the point water plate 45, the gas-liquid separation
4 side wall of device is equipped with seal box 48, and the point water plate 45 is arranged in the seal box 48；Mounting blocks are equipped with and point water plate phase
The groove of cooperation, mounting blocks are fixed point water plate by groove；When point water plate is encased in separator, point water plate is inserted
Enter into seal box, entered in separator by the through-hole of seal box and separator sidewall, is pushed into point water plate along through-hole
To separator interior, until point water plate is pushed into the groove of mounting blocks, the installation to point water plate is completed.
Sealing cover 481 is removably connected on the seal box 48, the sealing cover 481 is equipped with multiple holddown springs
4811, described 4811 one end of holddown spring is fixed with support plate 4812；Described 45 one end of point water plate is equipped with and the support plate
The 4812 third push plates 453 matched, 453 bottom surface of third push plate are equipped with sealing block 4531；Sealing block is elastic material system
At can be rubber material；Sealing cover edge is equipped with the first screw thread, and sealing chamber interior wall is equipped with second matched with the first screw thread
Screw thread, sealing cover are formed by screw thread and seal box and are connected；After point water plate is encased in separator, it will be sealed by screw thread
Lid is encased in seal box, and rotary seal lid enters sealing cover in seal box, when support plate is in contact with third push plate,
Continue rotary seal lid inside, make holddown spring forced contraction, until stopping after sealing cover is gone to extreme position；Pass through sealing
The effect of lid cooperation holddown spring elastic force plays fixed function to third push plate, pushes third push plate and separator sidewall to be formed and seals
Cooperation；Sealing block generates deformation under the action of third push plate, increases the contact area of sealing block and separator sidewall, makes to seal
Block blocks the junction of point water plate and separator, plays good sealing effect.
The point water plate 45 is equipped with sewage groove 451；452 surface of mounting blocks is set as arc-shaped structure；Point water plate will
It is placed in sewage groove from the impurity filtered out in liquid, when avoiding pulling out point water plate out of separator by sewage groove, point
Impurity on water plate is in contact with separator sidewall, the impurity in point water plate is pushed into the storage chamber of bottom, to storage chamber
Discharge outlet result in blockage；By the arc-shaped structure of mounting blocks, avoiding partial drop from falling can not fall on mounting blocks, long
Phase is deposited on mounting blocks the gas-liquid separation effect for influencing gas, promotes the separating effect of separator.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of air source heat pump and its flow control technique, including compressor (1), water-side heat (3), economizer (7), wing
Plate heat interchanger (14), pressure sensor, temperature sensor, controller and throttling set, it is characterised in that: the throttling set
Including the main road heating power expansion valve (9) and main road electric expansion valve (10) being set on the economizer (7) main road, the economizer
(7) bypass is equipped with bypass expansion valve (8)；The throttling set entrance is connected with the outlet of the economizer (7) main road, the section
Stream device exit is connected with the first check valve (11) and second one-way valve (13)；The outlet pressure duct of the compressor (1)
On be connected with for control the compressor (1) liquid disengaging four-way reversing valve (2)；When the operation of unit heating mode and outdoor gas
When temperature is lower, unit controls to expand the refrigerant of Combined throttling device using main road electric expansion valve (10) as auxiliary flow
Flow adjustment range, controller directly determine main road electric expansion valve according to outside air temperature and the height of air-conditioner water outlet temperature
(10) aperture；Main road electric expansion valve (10) aperture is fixed under the conditions of certain outside air temperature and leaving water temperature, works as outdoor
When temperature reduces, required refrigerating capacity flow is reduced, and main road electric expansion valve (10) aperture will be turned down gradually until completely closing.
2. a kind of air source heat pump described in accordance with the claim 1 and its flow control technique, it is characterised in that: the economizer
(7) main road entrance is equipped with liquid storage device (6), and the entrance low pressure line of the compressor (1) is equipped with gas-liquid separator (4), institute
Gas-liquid separator (4) is stated to be connected with the four-way reversing valve (2).
3. a kind of air source heat pump and its flow control technique according to claim 2, it is characterised in that: described finned
Heat exchanger (14) is connected with the four-way reversing valve (2), and finned heat exchanger (14) exit is equipped with third check valve
(15)；Liquid storage device (6) inlet is connected with the 4th check valve (5) and the 5th check valve (12).
4. a kind of air source heat pump described in accordance with the claim 1 and its flow control technique, it is characterised in that: when unit heats
Mode operation and when outside air temperature is higher or refrigeration mode is run, controller can pass through pressure sensor and temperature sensor meter
The practical heat absorption degree of superheat is calculated, and it is swollen to automatically control according to the deviation between practical suction superheat and target value main road electronics
The aperture of swollen valve (10).
5. a kind of air source heat pump and its flow control technique according to claim 4, it is characterised in that: when practical air-breathing
When the degree of superheat is less than target value, controller will turn down main road electric expansion valve (10) aperture automatically；When practical suction superheat is big
When target value, controller will open big main road electric expansion valve (10) aperture automatically.
6. a kind of air source heat pump and its flow control technique according to claim 2, it is characterised in that: the gas-liquid point
Air inlet (43) are equipped with from device (4) side, gas-liquid separator (4) other side is equipped with gas outlet (42)；The gas-liquid separation
Gas-guide tube (44) are equipped in device (4), the gas-guide tube (44) is equipped with thread plate (441), is additionally provided on the gas-guide tube (44)
Reversing plate (444).
7. a kind of air source heat pump and its flow control technique according to claim 6, it is characterised in that: the gas-liquid point
Top cover (41) are equipped with from device (4), top cover (41) bottom surface is equipped with link block (412), is equipped at the top of the gas-guide tube (44)
Thread groove (442), the link block (412) match with the thread groove (442)；Top cover (41) bottom surface is equipped with sealing plate
(414), the sealing plate (414) is equipped with the first gasket (4141).
8. a kind of air source heat pump and its flow control technique according to claim 7, it is characterised in that: the top cover
(4) the first push plate (411) are equipped with, the first push plate (411) bottom is equipped with push rod (413), and the push rod (413) is arranged in
In the top cover (41)；Hydraulic cavities (4122) are equipped in the link block (412), oil storage is equipped with above the hydraulic cavities (4122)
Case (4121), the fuel reserve tank (4121) is interior to be equipped with the second push plate (4133), second push plate (4133) and the push rod
(413) bottom end is fixedly connected with；Fixation kit (4123) are equipped in the hydraulic cavities (4122).
9. a kind of air source heat pump and its flow control technique according to claim 8, it is characterised in that: described first pushes away
Plate (411) bottom surface is equipped with the first barb (4111), and top cover (41) top surface is equipped with and matches with first barb (4111)
The second barb (4161), the second barb (4161) bottom is equipped with the first sliding block (4163), sets at the top of the top cover (41)
There is the first sliding groove (415) matched with first sliding block (4163), the second barb (4161) side is equipped with the first limit
Position plate (4162), the second barb (4161) other side are equipped with the second limit plate (4164), second limit plate (4164)
It is equipped with reset spring (4165) and support rod component (4166).
10. a kind of air source heat pump and its flow control technique according to claim 7, it is characterised in that: the top cover
(41) bottom is equipped with annular groove (418), and annular groove (418) bottom surface is equipped with the first magnetic patch (4181), first magnetic patch (4181)
It is equipped with the second gasket (41811)；The second magnetic patch (4183) are equipped in the annular groove (418), second magnetic patch (4183)
Top surface is equipped with third gasket (41834), and bottom surface is equipped with the 4th gasket (41832)；Second magnetic patch (4183) two sides are set
Have the second sliding block (41831), it is sliding that annular groove (418) inner wall is equipped with second matched with second sliding block (41831)
Slot (4182)；First magnetic patch (4181) is repelled each other with the second magnetic patch (4183) magnetism.
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| CN201810711044.3A CN109028640B (en) | 2018-07-03 | 2018-07-03 | A kind of flow control methods of air source heat pump |
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| CN201810711044.3A CN109028640B (en) | 2018-07-03 | 2018-07-03 | A kind of flow control methods of air source heat pump |
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| CN109780749A (en) * | 2019-03-14 | 2019-05-21 | 哈尔滨工业大学 | Utilize the ultra-low-loop temperature air source heat pump unit of diurnal temperature range outside accumulation of heat balance cylinder |
| CN111627340A (en) * | 2020-06-30 | 2020-09-04 | 京东方科技集团股份有限公司 | Display device and electronic apparatus |
| CN111692735A (en) * | 2020-06-02 | 2020-09-22 | 广东美的制冷设备有限公司 | Air conditioner system, control method and device thereof and storage medium |
| WO2022183726A1 (en) * | 2021-03-02 | 2022-09-09 | 广东美的暖通设备有限公司 | Economizer opening temperature determination method and determination device, and air conditioning system |
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