CN105241141B - Air-cooled heat pump water chiller-heater units and its defrosting control method - Google Patents
Air-cooled heat pump water chiller-heater units and its defrosting control method Download PDFInfo
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- CN105241141B CN105241141B CN201510615502.XA CN201510615502A CN105241141B CN 105241141 B CN105241141 B CN 105241141B CN 201510615502 A CN201510615502 A CN 201510615502A CN 105241141 B CN105241141 B CN 105241141B
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Abstract
The present invention discloses a kind of air-cooled heat pump water chiller-heater units and its defrosting control method, wherein this approach includes the following steps：Detection outdoor environment temperature T4, the corresponding water inlet water temperature of each module machine and output water temperature in real time；Obtain the disengaging water temperature difference of each module machine；When judging that it is run in a manner of rotation defrost according to T4, controls at least one module machine and open, and at least one module machine is kept to be in shutdown status；Any module machine that the corresponding disengaging water temperature difference of any module machine according to the corresponding disengaging water temperature difference of any module machine of unlatching and in shutdown status controls the unlatching replaces heating operation with any module machine in shutdown status; and the wind turbine continuous service for keeping any module machine of the unlatching and being in any module machine of shutdown status; to carry out defrost by the forced-convection heat transfer of wind turbine; to by switching to continue by carry out defrost using wind turbine between module machine; the heating effect of air-cooled heat pump water chiller-heater units is improved, user experience is improved.
Description
Technical field
The present invention relates to air-conditioning technical field, more particularly to a kind of defrosting control method of air-cooled heat pump water chiller-heater units and
A kind of air-cooled heat pump water chiller-heater units.
Background technology
For air heat pump type air-conditioning, in heating operation, need to absorb heat from air, but the change of environment temperature
Change, domestic hot water side heat exchanger frosting can be caused so that air heat pump type air-conditioning heating ability and efficiency decline.In order to avoid heating is imitated
Fruit is deteriorated, and air heat pump type air-conditioning can run defrost pattern and defrost, and defrost pattern cannot heat, finally to entirety
Heating effect have a great impact.
In the related technology, when air heat pump type air-conditioning is during defrost, compressor operating, four-way valve commutation while wind
Machine shuts down, and air heat pump type air-conditioning is switched to refrigerating operaton, and defrost is carried out by high temperature refrigerant, after white all thawings,
Defrost is exited, heating is then proceeded by.It follows that defrost process is process of refrigerastion, water temperature can be impacted, to shadow
Complete machine capability is rung, user experience is influenced.
Invention content
The present invention is directed to solve one of the technical problem in above-mentioned technology at least to a certain extent.For this purpose, the present invention
One purpose is to propose a kind of defrosting control method of air-cooled heat pump water chiller-heater units, need not be converted to refrigerating operaton and stop
Wind turbine carries out defrost, but by switching between control module machine to continue by carry out defrost using wind turbine itself,
The heating effect of air-cooled heat pump water chiller-heater units is improved, user experience is improved.
It is another object of the present invention to propose a kind of air-cooled heat pump water chiller-heater units.
In order to achieve the above objectives, one aspect of the present invention embodiment proposes a kind of defrost control of air-cooled heat pump water chiller-heater units
Method processed, wherein the air-cooled heat pump water chiller-heater units include N number of module machine, and N is the integer more than or equal to 2, each mould
The outlet pipe of block machine is each individually connected to the total outlet pipe of the air-cooled heat pump water chiller-heater units, the water inlet of each module machine
Pipe is each individually connected to the water inlet manifold of the air-cooled heat pump water chiller-heater units, to realize that N number of module machine is connected in parallel, institute
Defrosting control method is stated to include the following steps：Detection outdoor environment temperature T4 in real time, and each module machine pair is detected in real time
The water inlet water temperature and output water temperature answered；According to the water inlet water temperature and output water temperature that detect in real time obtain each module machine into
Temperature difference of outlet water；When the air-cooled heat pump water chiller-heater units enter defrost pattern, the outdoor environment temperature T4 is judged；
If the outdoor environment temperature T4 is more than the first preset temperature, the air-cooled heat-pump cold is controlled according to the disengaging water temperature difference
Hot water units are run in a manner of rotation defrost.
According to one embodiment of present invention, when the air-cooled heat pump water chiller-heater units are run in a manner of rotation defrost,
At least one of wherein, control the module machine unlatching of at least one of N number of module machine, and keep N number of module machine
Module machine is in shutdown status；And according to the corresponding disengaging water temperature difference of any module machine of unlatching and appointing in shutdown status
Any module machine that the corresponding disengaging water temperature difference of one module machine controls the unlatching replaces with any module machine in shutdown status
Heating operation, and the wind turbine in any module machine of the unlatching is kept to be held with the wind turbine in any module machine in shutdown status
Reforwarding row, to carry out defrost by the forced-convection heat transfer of wind turbine.
The defrosting control method of air-cooled heat pump water chiller-heater units according to the ... of the embodiment of the present invention detects outdoor environment temperature in real time
T4 is spent, and detects the corresponding water inlet water temperature of each module machine and output water temperature in real time to obtain the disengaging water temperature of each module machine
Then difference judges that air-cooled heat pump water chiller-heater units are run in a manner of rotation defrost by the outdoor environment temperature T4 detected in real time
When, the unlatching of at least one of N number of module machine module machine is controlled, and at least one of N number of module machine module machine is kept to be in
Shutdown status, then according to the corresponding disengaging water temperature difference of any module machine of unlatching and any module machine pair in shutdown status
Any module machine that the disengaging water temperature difference answered controls the unlatching replaces heating operation with any module machine in shutdown status, and
The wind turbine in any module machine of the unlatching and the wind turbine continuous service in any module machine in shutdown status are kept, with logical
The forced-convection heat transfer for crossing wind turbine carries out defrost, carries out defrost without being converted to refrigerating operaton and blowing-out machine, reduces system
Heating decaying when thermal cream, greatly improves the heating effect of air-cooled heat pump water chiller-heater units, improves user experience.
According to one embodiment of present invention, the defrosting control method of the air-cooled heat pump water chiller-heater units further includes：
If the outdoor environment temperature T4 is less than or equal to first preset temperature, the air-cooled heat pump water chiller-heater units are controlled
It is run with conventional Defrost mode.
According to one embodiment of present invention, when any module machine of the unlatching is primary module machine, in shutdown status
Any module machine be first from module machine when, the corresponding disengaging water temperature difference of any module machine according to unlatching and in shutdown
The corresponding disengaging water temperature difference of any module machine of state controls any module machine of the unlatching and any mould for being in shutdown status
Block machine alternating heating operation specifically includes：A, the compressor controlled in the primary module machine is switched on so that the primary module mechanism is hot
Operation, and it is first to obtain the disengaging water temperature difference of the primary module machine after the first preset time of the primary module machine heating operation
Inlet and outlet water initial temperature differences, while obtaining the accumulation heat pamp of the primary module machine；B, when the accumulation frosting of the primary module machine
When time reaches the disengaging water temperature difference of first time threshold or the primary module machine less than the first fiducial temperature, the master is controlled
Compressor shutdown in module machine, the wind turbine in the primary module machine continues to run with, and controls described first from module machine
Compressor is switched on so that described first runs from module machine heat, wherein first fiducial temperature is passed in and out according to described first
Water initial temperature differences are calculated；C, described first is obtained after running first preset time from module machine heat described first
It is the second Inlet and outlet water initial temperature differences from the disengaging water temperature difference of module machine, while obtains described first from when the accumulation frosting of module machine
Between；D, when described first from the accumulation heat pamp of module machine reach second time threshold or described first from module machine into
When temperature difference of outlet water is less than the second fiducial temperature, control described first is from the compressor shutdown in module machine, and described first from module
The wind turbine of machine continues to run with, and returns to step a, wherein second fiducial temperature is initial according to second Inlet and outlet water
Differential thermal calculation obtains.
According to one embodiment of present invention, it the corresponding disengaging water temperature difference of any module machine according to unlatching and is in
The corresponding disengaging water temperature difference of any module machine of shutdown status controls any module machine of the unlatching and appointing in shutdown status
One module machine replaces heating operation：When the accumulation heat pamp of the primary module machine is not up to the first time
When threshold value and the disengaging water temperature difference of the primary module machine are more than or equal to first fiducial temperature, control the primary module machine and continue
Heating operation.
According to one embodiment of present invention, it the corresponding disengaging water temperature difference of any module machine according to unlatching and is in
The corresponding disengaging water temperature difference of any module machine of shutdown status controls any module machine of the unlatching and appointing in shutdown status
One module machine replaces heating operation：It is not up to described second from the accumulation heat pamp of module machine when described first
Time threshold and described first from the disengaging water temperature difference of module machine be more than or equal to second fiducial temperature when, control described first
Continue heating operation from module machine.
In order to achieve the above objectives, a kind of air-cooled heat pump water chiller-heater units that another aspect of the present invention embodiment proposes, including：
The outlet pipe of N number of module machine, each module machine is each individually connected to the total outlet pipe of the air-cooled heat pump water chiller-heater units,
The water inlet pipe of each module machine is each individually connected to the water inlet manifold of the air-cooled heat pump water chiller-heater units, described in realization
N number of module machine is connected in parallel, wherein N is the integer more than or equal to 2；First temperature detecting module is used for real-time sensing chamber's outer shroud
Border temperature T4；Second temperature detection module, for detecting the corresponding water inlet water temperature of each module machine in real time；Third temperature is examined
Module is surveyed, for detecting the corresponding output water temperature of each module machine in real time；Control module, for according in real time detect into
Water water temperature and output water temperature obtain the disengaging water temperature difference of each module machine, and enter in the air-cooled heat pump water chiller-heater units
The outdoor environment temperature T4 is judged when defrost pattern, wherein if the outdoor environment temperature T4 is more than first in advance
If temperature, the control module then controls the air-cooled heat pump water chiller-heater units with rotation defrost side according to the disengaging water temperature difference
Formula is run.
According to one embodiment of present invention, when the air-cooled heat pump water chiller-heater units are run in a manner of rotation defrost,
The control module controls at least one of N number of module machine module machine and opens, and keeps in N number of module machine extremely
A few module machine is in shutdown status, and according to the corresponding disengaging water temperature difference of any module machine of unlatching and in shutdown shape
The corresponding disengaging water temperature difference of any module machine of state controls any module machine of the unlatching and any module for being in shutdown status
Machine replaces heating operation, and keeps in the wind turbine in any module machine of the unlatching and any module machine in shutdown status
Wind turbine continuous service, to carry out defrost by the forced-convection heat transfer of wind turbine.
Air-cooled heat pump water chiller-heater units according to the ... of the embodiment of the present invention, when being run in a manner of rotation defrost, control module
The unlatching of at least one of N number of module machine module machine is controlled, and keeps at least one of N number of module machine module machine to be in and shuts down
State, it is then corresponding with any module machine in shutdown status according to the corresponding disengaging water temperature difference of any module machine of unlatching
Any module machine that disengaging water temperature difference controls the unlatching replaces heating operation with any module machine in shutdown status, and keeps
Wind turbine in any module machine of the unlatching and the wind turbine continuous service in any module machine in shutdown status, to pass through wind
The forced-convection heat transfer of machine carries out defrost and continues by progress using wind turbine itself that is, by the switching between module machine
Defrost reduces heating decaying when heating defrost, significantly without carrying out defrost by converting refrigerating operaton and blowing-out machine
Heating effect is improved, user experience is improved.
According to one embodiment of present invention, when the air-cooled heat pump water chiller-heater units enter defrost pattern, if institute
It states outdoor environment temperature T4 and is less than or equal to first preset temperature, it is cold and hot that the control module then controls the air-cooled heat pump
Water dispenser group is run with conventional Defrost mode.
According to one embodiment of present invention, when any module machine of the unlatching is primary module machine, in shutdown status
Any module machine be first from module machine when, the control module realized by following control flow control the primary module machine and
Described first replaces heating operation from module machine：A, the compressor controlled in the primary module machine is switched on so that the primary module machine
Heating operation, and the disengaging water temperature difference for obtaining after the first preset time of the primary module machine heating operation primary module machine is
First Inlet and outlet water initial temperature differences, while obtaining the accumulation heat pamp of the primary module machine；B, when the accumulation of the primary module machine
When heat pamp reaches the disengaging water temperature difference of first time threshold or the primary module machine less than the first fiducial temperature, institute is controlled
The compressor shutdown in primary module machine is stated, the wind turbine in the primary module machine continues to run with, and controls described first from module machine
In compressor be switched on so that described first from module machine heat run, wherein first fiducial temperature is according to described first
Inlet and outlet water initial temperature differences are calculated；C, described in being obtained after running first preset time from module machine heat described first
First from the disengaging water temperature difference of module machine is the second Inlet and outlet water initial temperature differences, while obtaining the described first accumulation knot from module machine
The white time；D, reach second time threshold or described first from module machine from the accumulation heat pamp of module machine when described first
Disengaging water temperature difference when being less than the second fiducial temperature, control described first from the compressor shutdown in module machine, described first from
The wind turbine of module machine continues to run with, and returns to step a, wherein second fiducial temperature is according to second Inlet and outlet water
Initial temperature differences are calculated.
According to one embodiment of present invention, when the accumulation heat pamp of the primary module machine is not up to the first time
When threshold value and the disengaging water temperature difference of the primary module machine are more than or equal to first fiducial temperature, described in the control module control
Primary module machine continues heating operation.
According to one embodiment of present invention, when described first described second is not up to from the accumulation heat pamp of module machine
Time threshold and described first from the disengaging water temperature difference of module machine be more than or equal to second fiducial temperature when, the control module
It controls described first and continues heating operation from module machine.
Description of the drawings
Fig. 1 is the block diagram according to the air-cooled heat pump water chiller-heater units of one embodiment of the invention；
Fig. 2 is the system structure diagram according to the module machine of one embodiment of the invention；
Fig. 3 is the flow chart according to the defrosting control method of the air-cooled heat pump water chiller-heater units of the embodiment of the present invention；And
Fig. 4 is change when being run in a manner of rotation defrost according to the air-cooled heat pump water chiller-heater units of one embodiment of the invention
White control flow chart.
Specific implementation mode
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
The defrosting control of the air-cooled heat pump water chiller-heater units proposed according to embodiments of the present invention described with reference to the accompanying drawings
Method and air-cooled heat pump water chiller-heater units.
In conjunction with shown in Fig. 1 and Fig. 2, air-cooled heat pump water chiller-heater units according to an embodiment of the invention include N number of module
Machine, N are the integer more than or equal to 2, and the outlet pipe of each module machine is each individually connected to always going out for air-cooled heat pump water chiller-heater units
The water inlet pipe of water pipe, each module machine is each individually connected to the water inlet manifold of air-cooled heat pump water chiller-heater units, to realize N number of module
Machine is connected in parallel.Also, as shown in Fig. 2, each module machine may include (the first heating water system of multiple heating water systems such as two
System and the second heating water system), wherein the air-conditioning in air-conditioning heat exchanger and the second heating water system in the first heating water system
Heat exchanger shares a wind turbine, and shares same water-side heat.
That is, each air-cooled heat pump cold-hot water machine constitutes independent module machine, each module machine shares same
One main waterway, N number of module mechanism at air-cooled heat pump water chiller-heater units provide cold and hot amount for interior machine.
As shown in figure 3, the defrosting control method of the air-cooled heat pump water chiller-heater units includes the following steps：
S1 detects outdoor environment temperature T4 in real time, and detects the corresponding water inlet water temperature of each module machine and water outlet water in real time
Temperature.
Wherein, outdoor environment temperature T4 can be detected by outdoor temperature sensor, and can be by being arranged in each module machine
Water inlet pipe at temperature sensor detect the water inlet water temperature of corresponding module machine, and by the way that going out in each module machine is arranged
Temperature sensor at water pipe detects the output water temperature of corresponding module machine.
S2 obtains the disengaging water temperature difference of each module machine according to the water inlet water temperature and output water temperature that detect in real time.
S3 judges outdoor environment temperature T4 when air-cooled heat pump water chiller-heater units enter defrost pattern.
S4 controls air-cooled heat-pump cold if outdoor environment temperature T4 is more than the first preset temperature according to disengaging water temperature difference
Hot water units are run in a manner of rotation defrost.
According to one embodiment of present invention, it if outdoor environment temperature T4 is less than or equal to the first preset temperature, controls
Air-cooled heat pump water chiller-heater units processed are run with conventional Defrost mode.
Wherein, it should be noted that the first preset temperature can be carried out according to the concrete condition of air-cooled heat pump water chiller-heater units
Calibration.Also, conventional Defrost mode refers to that air-cooled heat pump water chiller-heater units are still carried out with normal refrigerating operaton and blowing-out machine
Defrost, in other words, when outdoor environment temperature T4 is relatively low, air-cooled heat pump water chiller-heater units still by normal refrigerating operaton and are stopped
Wind turbine carries out defrost.And air-cooled heat pump water chiller-heater units run rotation defrost between i.e. module machine in a manner of rotation defrost, only
For specific outdoor environment temperature.
In an embodiment of the present invention, when air-cooled heat pump water chiller-heater units are run in a manner of rotation defrost, wherein control
At least one of N number of module machine module machine is opened, and is kept at least one of N number of module machine module machine to be in and shut down shape
State；And according to the corresponding disengaging water temperature difference of any module machine of unlatching it is corresponding with any module machine in shutdown status into
Temperature difference of outlet water controls any module machine of the unlatching and any module machine in shutdown status replaces heating operation, and keeping should
Wind turbine in any module machine opened and the wind turbine continuous service in any module machine in shutdown status, to pass through wind turbine
Forced-convection heat transfer carry out defrost.
That is, when air-cooled heat pump water chiller-heater units are run in a manner of rotation defrost, first turn in N number of module machine
One or more module machines, and need to ensure that at least one module machine is in shutdown status, then according to the disengaging water temperature of acquisition
Poor parameter is completed to feed back the frosting situation of the module machine of unlatching by the parameter of above-mentioned acquisition and preset condition
The shutdown and rotation of compressor between module machine, wherein the module machine being rotated only stops compressor, not blowing-out machine passes through the strong of wind turbine
Heat convection processed defrosts, to realize rotation defrost between module machine and module machine.
Therefore it says, the defrosting control method of the air-cooled heat pump water chiller-heater units of the embodiment of the present invention, controls air-cooled heat-pump cold
When Hot water units are run in a manner of rotation defrost, defrost is carried out without converting refrigerating operaton and blowing-out machine, but module machine it
Between switching, continue by carry out defrost using wind turbine itself, to reduce heating defrost when heating decaying, carry significantly
High heating effect improves user experience.
According to one embodiment of present invention, when any module machine of the unlatching is primary module machine, in shutdown status
Any module machine be first from module machine when, the corresponding disengaging water temperature difference of any module machine according to unlatching in above-mentioned steps S5
Disengaging water temperature difference corresponding with any module machine in shutdown status controls any module machine of the unlatching and in shutdown shape
Any module machine alternating heating operation of state specifically includes：A, the compressor controlled in primary module machine is switched on so that primary module mechanism
Heat operation, and it is the first Inlet and outlet water to obtain the disengaging water temperature difference of primary module machine after primary module machine the first preset time of heating operation
Initial temperature differences, while obtaining the accumulation heat pamp of primary module machine；B, when the accumulation heat pamp of primary module machine reaches first
Between threshold value or the disengaging water temperature difference of primary module machine when being less than the first fiducial temperature, control the compressor shutdown in primary module machine,
Wind turbine in primary module machine continues to run with, and controls first and be switched on from the compressor in module machine so that first is hot from module machine
Operation, wherein the first fiducial temperature is calculated according to the first Inlet and outlet water initial temperature differences；C, it is run from module machine heat first
After first preset time obtain first from the disengaging water temperature difference of module machine be the second Inlet and outlet water initial temperature differences, while obtain first from
The accumulation heat pamp of module machine；D, when first from the accumulation heat pamp of module machine reach second time threshold or first from
When the disengaging water temperature difference of module machine is less than the second fiducial temperature, control first is from the compressor shutdown in module machine, and first from mould
The wind turbine of block machine continues to run with, and returns to step a, wherein the second fiducial temperature is according to the second Inlet and outlet water initial temperature differences meter
It obtains.
Specifically, as shown in figure 4, defrosting control flow when air-cooled heat pump water chiller-heater units are run in a manner of rotation defrost
Include the following steps：
S301, air-cooled heat pump water chiller-heater units are run after receiving power-on instruction with heating mode.
S302, the compressor controlled in primary module machine are opened so that primary module machine heating operation, and in primary module mechanism heat
After running the first preset time t 1, step S303 is executed.
S303, the disengaging water temperature difference for obtaining primary module machine are the first Inlet and outlet water initial temperature differences Tca.
S304 obtains the accumulation heat pamp ta of primary module machine.
That is, after the first preset time t of primary module machine heating operation 1, the disengaging water temperature difference that records at this time is the
One Inlet and outlet water initial temperature differences Tca is carried out at the same time frosting and accumulates timing to obtain the accumulation heat pamp ta of primary module machine.
S305, judges whether the disengaging water temperature difference for obtaining primary module machine in real time is less than the first fiducial temperature.If so, executing
Step S307；If not, executing step S306.Wherein, the first fiducial temperature is initially warm according to the first Inlet and outlet water of primary module machine
Poor Tca is calculated, such as the first fiducial temperature is Tca*90%.
S306 judges to accumulate whether heat pamp ta reaches first time threshold, wherein first time threshold is according to reality
Situation is demarcated.If so, thening follow the steps S307；If not, return to step S304, in other words, when the primary module machine
Accumulation heat pamp is not up to the first time threshold and the disengaging water temperature difference of the primary module machine is more than or equal to described first
When fiducial temperature, controls the primary module machine and continue heating operation.
S307 controls the compressor shutdown in primary module machine, and the wind turbine in primary module machine is kept to continue to run with, and controls the
One opens from the compressor in module machine so that first runs from module machine heat, and runs first from module machine heat first
After preset time t 1, step S308 is executed.
S308, obtain first from the disengaging water temperature difference of module machine be the second Inlet and outlet water initial temperature differences Tcb.
S309 obtains the first accumulation heat pamp tb from module machine.
That is, recording disengaging water temperature difference at this time after module machine heat runs the first preset time t 1 first
For the second Inlet and outlet water initial temperature differences Tcb, it is carried out at the same time frosting and accumulates timing to obtain the first accumulation heat pamp from module machine
tb。
S310 judges to obtain whether first be less than the second fiducial temperature from the disengaging water temperature difference of module machine in real time.If so,
Execute step S312；If not, executing step S311.Wherein, the second fiducial temperature is passed in and out according to first from the second of module machine
Water initial temperature differences Tcb is calculated, such as the second fiducial temperature is Tcb*90%.
S311 judges to accumulate whether heat pamp tb reaches second time threshold, wherein second time threshold is according to reality
Situation is demarcated.If so, thening follow the steps S312；If not, return to step S309, in other words, when described first from module
The accumulation heat pamp of machine is not up to the second time threshold and described first is more than or equal to from the disengaging water temperature difference of module machine
When second fiducial temperature, control described first continues heating operation from module machine.
S312, control first keep first to be continued to run with from the wind turbine in module machine from the compressor shutdown in module machine,
It is then back to and executes step S302.
It follows that in an embodiment of the present invention, when control air-cooled heat pump water chiller-heater units are transported in a manner of rotation defrost
When row, it can in turn be switched between module machine by controlling primary module machine and first, be made using continuing to run with for wind turbine itself
The heat progress defrost that the frost in corresponding air-conditioning heat exchanger absorbs ambient enviroment is obtained, to which heating when reducing heating defrost declines
Subtract, greatly improve heating effect, improves user experience.
Thus, when air-cooled heat pump water chiller-heater units are run using rotation defrost mode, the side by not blowing-out machine is realized
Formula carries out defrost, is not related to four-way valve commutation during defrost, so being not in intermittent refrigeration (refrigeration defrost) and causing
The fluctuating temperature of air-cooled heat pump water chiller-heater units, while the heating effect of air-cooled heat pump water chiller-heater units will not decay,
Improve user experience.
The defrosting control method of air-cooled heat pump water chiller-heater units according to the ... of the embodiment of the present invention detects outdoor environment temperature in real time
T4 is spent, and detects the corresponding water inlet water temperature of each module machine and output water temperature in real time to obtain the disengaging water temperature of each module machine
Then difference judges that air-cooled heat pump water chiller-heater units are run in a manner of rotation defrost by the outdoor environment temperature T4 detected in real time
When, the unlatching of at least one of N number of module machine module machine is controlled, and at least one of N number of module machine module machine is kept to be in
Shutdown status, then according to the corresponding disengaging water temperature difference of any module machine of unlatching and any module machine pair in shutdown status
Any module machine that the disengaging water temperature difference answered controls the unlatching replaces heating operation with any module machine in shutdown status, and
The wind turbine in any module machine of the unlatching and the wind turbine continuous service in any module machine in shutdown status are kept, with logical
The forced-convection heat transfer for crossing wind turbine carries out defrost, carries out defrost without being converted to refrigerating operaton and blowing-out machine, reduces system
Heating decaying when thermal cream, greatly improves the heating effect of air-cooled heat pump water chiller-heater units, improves user experience.
In addition, a kind of air-cooled heat pump water chiller-heater units that the embodiment of the present invention also proposes include：N number of module machine 100, first
Temperature detecting module, second temperature detection module, third temperature detecting module and control module, N are the integer more than or equal to 2.
Wherein, as shown in Figure 1, the outlet pipe of each module machine 100 is each individually connected to air-cooled heat pump water chiller-heater units
The water inlet pipe of total outlet pipe, each module machine 100 is each individually connected to the water inlet manifold of air-cooled heat pump water chiller-heater units, to realize
N number of module machine 100 is connected in parallel.
Also, as shown in Fig. 2, each module machine 100 may include (the first heating water system of multiple heating water systems such as two
System and the second heating water system), wherein the air-conditioning in air-conditioning heat exchanger and the second heating water system in the first heating water system
Heat exchanger shares a wind turbine, and shares same water-side heat.
Specifically, as shown in Fig. 2, the first heating water system includes compressor 11, delivery temperature switch 12, high-voltage switch gear
13, four-way valve 14, low tension switch 15, low pressure fill 16, air-conditioning heat exchanger 17, electric expansion valve 18, and the second heating water system is same
The heat exchange of 26, air-conditioning is filled including compressor 21, delivery temperature switch 22, high-voltage switch gear 23, four-way valve 24, low tension switch 25, low pressure
Device 27, electric expansion valve 28.Also, the air-conditioning heat exchanger 17 and second in the first heating water system heats the air-conditioning in water system
Heat exchanger 27 shares a wind turbine 10, and the first heating water system and the second heating water system also share water-side heat, that is, casing and change
Hot device 20, meanwhile, it is respectively provided with temperature sensor at the water outlet pipe part of double-tube heat exchanger 20 and water inlet pipe, is arranged in water outlet pipe part
Flow sensor, and between air-conditioning heat exchanger 17 and electric expansion valve 18 be arranged temperature sensor 19, in air-conditioning heat exchanger
Temperature sensor 29 is set between 27 and electric expansion valve 28.
In an embodiment of the present invention, the first temperature detecting module such as outdoor temperature sensor is for outside real-time sensing chamber
Environment temperature T4, second temperature detection module (such as the temperature sensor 101 being arranged at each module machine water inlet pipe) are used for
Detect the corresponding water inlet water temperature of each module machine in real time, third temperature detecting module (such as be arranged in each module machine outlet pipe
The temperature sensor at place) for detecting the corresponding output water temperature of each module machine in real time, control module is used for according to detection in real time
Water inlet water temperature and output water temperature obtain the disengaging water temperature difference of each module machine, and in the air-cooled heat pump water chiller-heater units
The outdoor environment temperature T4 is judged into when defrost pattern, wherein if the outdoor environment temperature T4 is more than the
One preset temperature, the control module then control the air-cooled heat pump water chiller-heater units with rotation according to the disengaging water temperature difference
White mode is run.
According to one embodiment of present invention, when the air-cooled heat pump water chiller-heater units are run in a manner of rotation defrost,
The control module controls at least one of N number of module machine module machine and opens, and keeps in N number of module machine extremely
A few module machine is in shutdown status, and according to the corresponding disengaging water temperature difference of any module machine of unlatching and in shutdown shape
The corresponding disengaging water temperature difference of any module machine of state controls any module machine of the unlatching and any module for being in shutdown status
Machine replaces heating operation, and keeps in the wind turbine in any module machine of the unlatching and any module machine in shutdown status
Wind turbine continuous service, to carry out defrost by the forced-convection heat transfer of wind turbine.
Further, when the air-cooled heat pump water chiller-heater units enter defrost pattern, if the outdoor environment temperature
T4 is less than or equal to first preset temperature, and the control module is then controlled the air-cooled heat pump water chiller-heater units and removed with conventional
White mode is run.
Wherein, it should be noted that the first preset temperature can be carried out according to the concrete condition of air-cooled heat pump water chiller-heater units
Calibration.Also, conventional Defrost mode refers to that air-cooled heat pump water chiller-heater units are still carried out with normal refrigerating operaton and blowing-out machine
Defrost, in other words, when outdoor environment temperature T4 is relatively low, air-cooled heat pump water chiller-heater units still by normal refrigerating operaton and are stopped
Wind turbine carries out defrost.And air-cooled heat pump water chiller-heater units run rotation defrost between i.e. module machine in a manner of rotation defrost, only
For specific outdoor environment temperature.
Specifically, according to one embodiment of present invention, when any module machine of the unlatching is primary module machine, in shutdown
Any module machine of state be first from module machine when, the control module, which passes through following control flow, to be realized and controls the main mould
Block machine and described first replaces heating operation from module machine：
A, the compressor in the primary module machine is controlled to be switched on so that the primary module machine heating operation, and in the main mould
The disengaging water temperature difference that the primary module machine is obtained after block machine the first preset time of heating operation is the first Inlet and outlet water initial temperature differences, together
When obtain the accumulation heat pamp of the primary module machine；
B, when the accumulation heat pamp of the primary module machine reaches the disengaging of first time threshold or the primary module machine
When water temperature difference is less than the first fiducial temperature, the compressor shutdown in the primary module machine, the wind turbine in the primary module machine are controlled
Continue to run with, and control described first from module machine compressor be switched on so that described first from module machine heat run,
In, first fiducial temperature is calculated according to the first Inlet and outlet water initial temperature differences；
C, described first is obtained from module machine after running first preset time from module machine heat described first
Disengaging water temperature difference is the second Inlet and outlet water initial temperature differences, while obtaining the described first accumulation heat pamp from module machine；
D, reach second time threshold or described first from module from the accumulation heat pamp of module machine when described first
When the disengaging water temperature difference of machine is less than the second fiducial temperature, control described first is from the compressor shutdown in module machine, and described first
It is continued to run with from the wind turbine of module machine, and returns to step a, wherein second fiducial temperature is passed in and out according to described second
Water initial temperature differences are calculated.
Also, when the accumulation heat pamp of the primary module machine is not up to the first time threshold and the primary module machine
Disengaging water temperature difference when being more than or equal to first fiducial temperature, the control module controls the primary module machine and continues heating fortune
Row.The second time threshold and described first is not up to from module machine from the accumulation heat pamp of module machine when described first
When passing in and out water temperature difference more than or equal to second fiducial temperature, the control module control described first continues to heat from module machine
Operation.
In conclusion in an embodiment of the present invention, when air-cooled heat pump water chiller-heater units are run in a manner of rotation defrost,
Switched in turn between module machine by switching such as primary module machine and first between control module machine in turn, utilizes wind turbine itself
Continue to run with and make corresponding air-conditioning heat exchanger on frost absorb ambient enviroment heat carry out defrost, to reduce heating
Heating decaying when defrost, greatly improves heating effect, improves user experience.
Air-cooled heat pump water chiller-heater units according to the ... of the embodiment of the present invention, when being run in a manner of rotation defrost, control module
The unlatching of at least one of N number of module machine module machine is controlled, and keeps at least one of N number of module machine module machine to be in and shuts down
State, it is then corresponding with any module machine in shutdown status according to the corresponding disengaging water temperature difference of any module machine of unlatching
Any module machine that disengaging water temperature difference controls the unlatching replaces heating operation with any module machine in shutdown status, and keeps
Wind turbine in any module machine of the unlatching and the wind turbine continuous service in any module machine in shutdown status, to pass through wind
The forced-convection heat transfer of machine carries out defrost and continues by progress using wind turbine itself that is, by the switching between module machine
Defrost reduces heating decaying when heating defrost, significantly without carrying out defrost by converting refrigerating operaton and blowing-out machine
Heating effect is improved, user experience is improved.
In the description of the present invention, it is to be understood that, term "center", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on ... shown in the drawings or
Position relationship is merely for convenience of description of the present invention and simplification of the description, and does not indicate or imply the indicated device or element must
There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；Can be that machinery connects
It connects, can also be electrical connection；It can be directly connected, can also can be indirectly connected through an intermediary in two elements
The interaction relationship of the connection in portion or two elements, unless otherwise restricted clearly.For those of ordinary skill in the art
For, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature can be with "above" or "below" second feature
It is that the first and second features are in direct contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is directly under or diagonally below the second feature, or is merely representative of fisrt feature level height and is less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiments or example.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (12)
1. a kind of defrosting control method of air-cooled heat pump water chiller-heater units, which is characterized in that the air-cooled heat pump water chiller-heater units
Including N number of module machine, N is the integer more than or equal to 2, and the outlet pipe of each module machine is each individually connected to the air-cooled heat
The total outlet pipe of water chiller-heater unit is pumped, the water inlet pipe of each module machine is each individually connected to the air-cooled heat pump cold-hot water machine
The water inlet manifold of group, to realize that N number of module machine is connected in parallel, the defrosting control method includes the following steps：
Detection outdoor environment temperature T4 in real time, and the corresponding water inlet water temperature of each module machine and output water temperature are detected in real time；
The disengaging water temperature difference of each module machine is obtained according to the water inlet water temperature and output water temperature detected in real time；
When the air-cooled heat pump water chiller-heater units enter defrost pattern, the outdoor environment temperature T4 is judged；
If the outdoor environment temperature T4 is more than the first preset temperature, the air-cooled heat is controlled according to the disengaging water temperature difference
Pump water chiller-heater unit is run in a manner of rotation defrost.
2. the defrosting control method of air-cooled heat pump water chiller-heater units as described in claim 1, which is characterized in that when described air-cooled
When heat pump water chiller-heater unit is run in a manner of rotation defrost, wherein
The unlatching of at least one of N number of module machine module machine is controlled, and keeps at least one of N number of module machine mould
Block machine is in shutdown status；And
According to the disengaging corresponding with any module machine in shutdown status of the corresponding disengaging water temperature difference of any module machine of unlatching
Any module machine that water temperature difference controls the unlatching replaces heating operation with any module machine in shutdown status, and this is kept to open
Wind turbine in any module machine opened and the wind turbine continuous service in any module machine in shutdown status, to pass through wind turbine
Forced-convection heat transfer carries out defrost.
3. the defrosting control method of air-cooled heat pump water chiller-heater units as described in claim 1, which is characterized in that further include：
If the outdoor environment temperature T4 is less than or equal to first preset temperature, the air-cooled heat pump cold-hot water is controlled
Unit is run with conventional Defrost mode.
4. the defrosting control method of air-cooled heat pump water chiller-heater units as claimed in claim 2, which is characterized in that when the unlatching
Any module machine is primary module machine, any module machine in shutdown status be first from module machine when, it is described according to unlatching
Any corresponding disengaging water temperature difference of module machine disengaging water temperature difference corresponding with any module machine in shutdown status controls this and opens
Any module machine opened replaces heating operation with any module machine in shutdown status and specifically includes：
A, the compressor in the primary module machine is controlled to be switched on so that the primary module machine heating operation, and in the primary module machine
The disengaging water temperature difference that the primary module machine is obtained after the first preset time of heating operation is the first Inlet and outlet water initial temperature differences, is obtained simultaneously
Take the accumulation heat pamp of the primary module machine；
B, when the accumulation heat pamp of the primary module machine reaches first time threshold or the disengaging water temperature of the primary module machine
When difference is less than the first fiducial temperature, the compressor shutdown in the primary module machine is controlled, the wind turbine in the primary module machine continues
Operation, and control described first and be switched on from the compressor in module machine so that described first runs from module machine heat, wherein institute
The first fiducial temperature is stated to be calculated according to the first Inlet and outlet water initial temperature differences；
C, the described first disengaging from module machine is obtained after running first preset time from module machine heat described first
Water temperature difference is the second Inlet and outlet water initial temperature differences, while obtaining the described first accumulation heat pamp from module machine；
D, reach second time threshold or described first from module machine from the accumulation heat pamp of module machine when described first
When passing in and out water temperature difference and being less than the second fiducial temperature, control described first is from the compressor shutdown in module machine, and described first from mould
The wind turbine of block machine continues to run with, and returns to step a, wherein second fiducial temperature is according at the beginning of second Inlet and outlet water
Beginning differential thermal calculation obtains.
5. the defrosting control method of air-cooled heat pump water chiller-heater units as claimed in claim 4, which is characterized in that the basis is opened
The corresponding disengaging water temperature difference of any module machine disengaging water temperature difference control corresponding with any module machine in shutdown status opened
Any module machine of the unlatching replaces heating operation specifically with any module machine in shutdown status：
When the accumulation heat pamp of the primary module machine is not up to the Inlet and outlet water of the first time threshold and the primary module machine
When the temperature difference is more than or equal to first fiducial temperature, controls the primary module machine and continue heating operation.
6. the defrosting control method of air-cooled heat pump water chiller-heater units as claimed in claim 4, which is characterized in that the basis is opened
The corresponding disengaging water temperature difference of any module machine disengaging water temperature difference control corresponding with any module machine in shutdown status opened
Any module machine of the unlatching replaces heating operation specifically with any module machine in shutdown status：
The second time threshold and described first is not up to from module machine from the accumulation heat pamp of module machine when described first
Disengaging water temperature difference be more than or equal to second fiducial temperature when, control described first from module machine continue heating operation.
7. a kind of air-cooled heat pump water chiller-heater units, which is characterized in that including：
The outlet pipe of N number of module machine, each module machine is each individually connected to always going out for the air-cooled heat pump water chiller-heater units
The water inlet pipe of water pipe, each module machine is each individually connected to the water inlet manifold of the air-cooled heat pump water chiller-heater units, with reality
Existing N number of module machine is connected in parallel, wherein N is the integer more than or equal to 2；
First temperature detecting module, for detecting outdoor environment temperature T4 in real time；
Second temperature detection module, for detecting the corresponding water inlet water temperature of each module machine in real time；
Third temperature detecting module, for detecting the corresponding output water temperature of each module machine in real time；
Control module, the disengaging water temperature for obtaining each module machine according to the water inlet water temperature and output water temperature that detect in real time
Difference, and the outdoor environment temperature T4 is judged when the air-cooled heat pump water chiller-heater units enter defrost pattern, wherein
If the outdoor environment temperature T4 is more than the first preset temperature, according to the disengaging water temperature difference control if control module
The air-cooled heat pump water chiller-heater units are made to run in a manner of rotation defrost.
8. air-cooled heat pump water chiller-heater units as claimed in claim 7, which is characterized in that when the air-cooled heat pump water chiller-heater units
When being run in a manner of rotation defrost, the control module controls at least one of N number of module machine module machine and opens, and protects
It holds at least one of N number of module machine module machine and is in shutdown status, and is corresponding according to any module machine of unlatching
Disengaging water temperature difference and the corresponding disengaging water temperature difference of any module machine in shutdown status control any module machine of the unlatching with
Any module machine in shutdown status replaces heating operation, and wind turbine in any module machine of the unlatching is kept to stop with being in
Wind turbine continuous service in any module machine of machine state, to carry out defrost by the forced-convection heat transfer of wind turbine.
9. air-cooled heat pump water chiller-heater units as claimed in claim 7, which is characterized in that when the air-cooled heat pump water chiller-heater units
When into defrost pattern, if the outdoor environment temperature T4 is less than or equal to first preset temperature, the control module
The air-cooled heat pump water chiller-heater units are then controlled to run with conventional Defrost mode.
10. air-cooled heat pump water chiller-heater units as claimed in claim 8, which is characterized in that when any module machine of the unlatching is
Primary module machine, any module machine in shutdown status be first from module machine when, the control module is flowed by following control
Cheng Shixian controls the primary module machine and described first and replaces heating operation from module machine：
A, the compressor in the primary module machine is controlled to be switched on so that the primary module machine heating operation, and in the primary module machine
The disengaging water temperature difference that the primary module machine is obtained after the first preset time of heating operation is the first Inlet and outlet water initial temperature differences, is obtained simultaneously
Take the accumulation heat pamp of the primary module machine；
B, when the accumulation heat pamp of the primary module machine reaches first time threshold or the disengaging water temperature of the primary module machine
When difference is less than the first fiducial temperature, the compressor shutdown in the primary module machine is controlled, the wind turbine in the primary module machine continues
Operation, and control described first and be switched on from the compressor in module machine so that described first runs from module machine heat, wherein institute
The first fiducial temperature is stated to be calculated according to the first Inlet and outlet water initial temperature differences；
C, the described first disengaging from module machine is obtained after running first preset time from module machine heat described first
Water temperature difference is the second Inlet and outlet water initial temperature differences, while obtaining the described first accumulation heat pamp from module machine；
D, reach second time threshold or described first from module machine from the accumulation heat pamp of module machine when described first
When passing in and out water temperature difference and being less than the second fiducial temperature, control described first is from the compressor shutdown in module machine, and described first from mould
The wind turbine of block machine continues to run with, and returns to step a, wherein second fiducial temperature is according at the beginning of second Inlet and outlet water
Beginning differential thermal calculation obtains.
11. air-cooled heat pump water chiller-heater units as claimed in claim 10, which is characterized in that when the accumulation knot of the primary module machine
The white time is not up to the first time threshold and the disengaging water temperature difference of the primary module machine is more than or equal to the described first default temperature
When poor, the control module controls the primary module machine and continues heating operation.
12. air-cooled heat pump water chiller-heater units as claimed in claim 10, which is characterized in that when the described first tiring out from module machine
Product heat pamp is not up to the second time threshold and described first is more than or equal to described the from the disengaging water temperature difference of module machine
When two fiducial temperatures, the control module control described first continues heating operation from module machine.
Priority Applications (2)
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|---|---|---|---|
| CN201510615502.XA CN105241141B (en) | 2015-09-23 | 2015-09-23 | Air-cooled heat pump water chiller-heater units and its defrosting control method |
| PCT/CN2016/096049 WO2017050072A1 (en) | 2015-09-23 | 2016-08-19 | Water chiller-heater unit of air cooled heat pump and defrosting control method therefor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510615502.XA CN105241141B (en) | 2015-09-23 | 2015-09-23 | Air-cooled heat pump water chiller-heater units and its defrosting control method |
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| CN105241141B true CN105241141B (en) | 2018-09-07 |
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| WO2017050072A1 (en) * | 2015-09-23 | 2017-03-30 | 广东美的暖通设备有限公司 | Water chiller-heater unit of air cooled heat pump and defrosting control method therefor |
| CN106642586B (en) * | 2016-12-29 | 2019-09-17 | 广东美的暖通设备有限公司 | A kind of classification defrosting method and device for air-cooled heat pump Parallel sets |
| CN107166741B (en) * | 2017-06-19 | 2019-10-01 | 广东美的暖通设备有限公司 | Heat pump unit and its anti-freeze control method |
| CN109668356B (en) * | 2018-12-18 | 2021-01-19 | 广东芬尼克兹节能设备有限公司 | Defrosting control method and system of heat pump unit |
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| CN102840629A (en) * | 2011-06-20 | 2012-12-26 | 珠海格力电器股份有限公司 | Heat pump air conditioning system |
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