CN105115210B - 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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- CN105115210B CN105115210B CN201510617615.3A CN201510617615A CN105115210B CN 105115210 B CN105115210 B CN 105115210B CN 201510617615 A CN201510617615 A CN 201510617615A CN 105115210 B CN105115210 B CN 105115210B
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Abstract
The invention discloses a kind of air-cooled heat pump water chiller-heater units and its defrosting control method, wherein, this method comprises the following steps：The low-pressure lateral pressure of detection outdoor environment temperature T4 and each each compressor of module machine in real time；The low-pressure lateral pressure rate of change △ P of each compressor are obtained according to the low-pressure lateral pressure detected in real time；When air-cooled heat pump water chiller-heater units enter defrost pattern, when judging that it is run in a manner of rotation defrost according to T4, at least one module machine is controlled to open, and keep at least one module machine to be in stopped status；Any module machine for controlling the unlatching according to △ Pb corresponding to △ Pa corresponding to any module machine of unlatching and any module machine in stopped status replaces heating operation with any module machine in stopped status; and keep blower fan continuous service; to carry out defrost by the forced-convection heat transfer of blower fan; so as to by switching between module machine to continue by carry out defrost using blower fan; the heating effect of unit is improved, improves Consumer's Experience.
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, it is necessary 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 be defrosted, and defrost pattern can not heat, finally to entirety
Heating effect have a great impact.
In correlation technique, air heat pump type air-conditioning is when during defrost, compressor operating, four-way valve commutation while wind
Machine is shut down, and air heat pump type air-conditioning switches to refrigerating operaton, and defrost is carried out by high temperature refrigerant, after white all thawings,
Defrost is exited, then proceeds by heating.It follows that defrost process is process of refrigerastion, water temperature can be impacted, so as to shadow
Complete machine capability is rung, influences Consumer's Experience.
The content of the invention
It is contemplated that at least solves one of technical problem in above-mentioned technology to a certain extent.Therefore, the present invention
One purpose is to propose a kind of defrosting control method of air-cooled heat pump water chiller-heater units, it is not necessary to is converted to refrigerating operaton and stops
Blower fan carries out defrost, but by switching between control module machine to continue by carry out defrost using blower fan itself,
The heating effect of air-cooled heat pump water chiller-heater units is improved, improves Consumer's Experience.
It is another object of the present invention to propose a kind of air-cooled heat pump water chiller-heater units.
To reach above-mentioned purpose, 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, often
The individual module machine includes multiple heating water systems, and each heating water system includes compressor and air-conditioning heat exchanger, described
Defrosting control method comprises the following steps：Detection outdoor environment temperature T4 in real time, and detect in real time every in each module machine
The low-pressure lateral pressure of individual compressor；The low pressure of each compressor is obtained according to the low-pressure lateral pressure of each compressor detected in real time
Lateral pressure rate of change △ P；When the air-cooled heat pump water chiller-heater units enter defrost pattern, the outdoor environment temperature T4 is entered
Row judges；If the outdoor environment temperature T4 is more than the first preset temperature, become according to the low-pressure lateral pressure of each compressor
Rate △ P control the air-cooled heat pump water chiller-heater units to be 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,
Wherein, control at least one module machine in N number of module machine to open, and keep at least one in N number of module machine
Module machine is in stopped status；And according to corresponding to any module machine of unlatching each compressor low-pressure lateral pressure rate of change
The low-pressure lateral pressure rate of change △ Pb of each compressor control this to open corresponding to △ Pa and any module machine in stopped status
Any module machine opened replaces heating operation with any module machine in stopped status, and keeps any module machine of the unlatching
In blower fan with stopped status any module machine in blower fan continuous service, to be entered by the forced-convection heat transfer of blower fan
Row defrost.
The defrosting control method of air-cooled heat pump water chiller-heater units according to embodiments of the present invention, outdoor environment temperature is detected in real time
T4 is spent, and detects the low-pressure lateral pressure of each compressor in each module machine in real time, then the outdoor environment by detecting in real time
When temperature T4 judges that air-cooled heat pump water chiller-heater units are run in a manner of rotation defrost, at least one mould in N number of module machine is controlled
Block machine is opened, and keeps at least one module machine in N number of module machine to be in stopped status, then according to any module of unlatching
It is each corresponding to the low-pressure lateral pressure rate of change △ Pa of each compressor corresponding to machine and any module machine in stopped status
The low-pressure lateral pressure rate of change △ Pb of compressor control any module machine of the unlatching and any module machine in stopped status
Alternately heating operation, and keep the blower fan in any module machine of the unlatching and the wind in any module machine in stopped status
Machine continuous service, to carry out defrost by the forced-convection heat transfer of blower fan, come without being converted to refrigerating operaton and blowing-out machine
Defrost is carried out, heating decay during heating defrost is reduced, greatly improves the heating effect of air-cooled heat pump water chiller-heater units, improve and use
Experience at family.
According to one embodiment of present invention, the defrosting control method of described air-cooled heat pump water chiller-heater units also 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
Run with conventional Defrost mode.
According to one embodiment of present invention, when any module machine of the unlatching is primary module machine, in stopped status
When any module machine is the first slave module machine, the low pressure side pressure of each compressor corresponding to any module machine according to unlatching
The low-pressure lateral pressure rate of change △ Pb of each compressor corresponding to power rate of change △ Pa and any module machine in stopped status
Control any module machine of the unlatching to replace heating operation with any module machine in stopped status to specifically include：A, control institute
State compressor in primary module machine to start shooting so that the primary module machine heating operation, and obtained after the primary module machine heating operation
Take the accumulation heat pamp of the primary module machine；B, when the accumulation heat pamp of the primary module machine reach very first time threshold value or
When the low-pressure lateral pressure rate of change △ Pa of any compressor are more than or equal to the first preset value in primary module machine described in person, described in control
Compressor shutdown in primary module machine, the blower fan in the primary module machine continues to run with, and controls in the first slave module machine
Compressor start shooting so that the first slave module machine heating operation, and obtained after the first slave module machine heating operation
The accumulation heat pamp of the first slave module machine；C, when the accumulation heat pamp of the first slave module machine reached for the second time
It is pre- to be more than or equal to described first by the low-pressure lateral pressure rate of change △ Pb of any compressor in threshold value or the first slave module machine
If during value, controlling the compressor shutdown in the first slave module machine, the blower fan in the first slave module machine continues to run with, and
Return and perform step a.
According to one embodiment of present invention, the low pressure of each compressor corresponding to any module machine according to unlatching
The low-pressure lateral pressure rate of change of each compressor corresponding to lateral pressure rate of change △ Pa and any module machine in stopped status
△ Pb, which control any module machine of the unlatching to replace heating operation with any module machine in stopped status, specifically also to be included：When
The accumulation heat pamp of the primary module machine is not up to each compressor in the very first time threshold value and the primary module machine
When low-pressure lateral pressure rate of change △ Pa are respectively less than first preset value, the primary module machine is controlled to continue heating operation.
According to one embodiment of present invention, the low pressure of each compressor corresponding to any module machine according to unlatching
The low-pressure lateral pressure rate of change of each compressor corresponding to lateral pressure rate of change △ Pa and any module machine in stopped status
△ Pb, which control any module machine of the unlatching to replace heating operation with any module machine in stopped status, specifically also to be included：When
The accumulation heat pamp of the first slave module machine is not up in second time threshold and the first slave module machine each
When the low-pressure lateral pressure rate of change △ Pb of compressor are respectively less than first preset value, the first slave module machine is controlled to continue to make
Heat operation.
To reach above-mentioned purpose, a kind of air-cooled heat pump water chiller-heater units that another aspect of the present invention embodiment proposes, including：
N number of module machine, the outlet pipe of each module machine are 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, with described in realization
N number of module machine is connected in parallel, wherein, each module machine includes multiple heating water systems, each heating water system bag
Compressor and air-conditioning heat exchanger are included, N is the integer more than or equal to 2；First temperature detecting module, for detecting outdoor environment in real time
Temperature T4；First pressure detection module, for detecting the low-pressure lateral pressure of each compressor in each module machine in real time；Control
Molding block, for obtaining the low-pressure lateral pressure change of each compressor according to the low-pressure lateral pressure of each compressor detected in real time
Rate △ P, and the outdoor environment temperature T4 is judged when the air-cooled heat pump water chiller-heater units enter defrost pattern, its
In, if the outdoor environment temperature T4 is more than the first preset temperature, the control module is then according to the low pressure of each compressor
Lateral pressure rate of change △ P control the air-cooled heat pump water chiller-heater units to be 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,
The control module controls at least one module machine in N number of module machine to open, and keeps in N number of module machine extremely
A few module machine is in stopped status, and according to corresponding to any module machine of unlatching each compressor low-pressure lateral pressure
The low-pressure lateral pressure rate of change △ Pb controls of each compressor corresponding to rate of change △ Pa and any module machine in stopped status
Any module machine for making the unlatching replaces heating operation with any module machine in stopped status, and keeps any of the unlatching
Blower fan in module machine and the blower fan continuous service in any module machine in stopped status, to pass through the forced convertion of blower fan
Heat exchange carries out defrost.
Air-cooled heat pump water chiller-heater units according to embodiments of the present invention, when being run in a manner of rotation defrost, control module
Control at least one module machine in N number of module machine to open, and keep at least one module machine in N number of module machine to be in and shut down
State, then low-pressure lateral pressure rate of change △ Pa of each compressor and in shutdown according to corresponding to any module machine of unlatching
The low-pressure lateral pressure rate of change △ Pb of each compressor control any module machine of the unlatching corresponding to any module machine of state
Replace heating operation with any module machine in stopped status, and keep the blower fan in any module machine of the unlatching with being in
Blower fan continuous service in any module machine of stopped status, to carry out defrost by the forced-convection heat transfer of blower fan, that is, pass through
Switching between module machine, carry out defrost is continued by using blower fan itself, without by change refrigerating operaton and
Blowing-out machine carries out defrost, reduces heating decay during heating defrost, greatly improves heating effect, improve Consumer's Experience.
According to one embodiment of present invention, when the air-cooled heat pump water chiller-heater units enter defrost pattern, if institute
State outdoor environment temperature T4 and be less than or equal to first preset temperature, the control module then controls the air-cooled heat pump cold and hot
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 stopped status
When any module machine is the first slave module machine, the control module realized by following control flow control the primary module machine and
The first slave module machine replaces heating operation：A, the compressor in the primary module machine is controlled to start shooting so that the primary module machine
Heating operation, and obtain after the primary module machine heating operation accumulation heat pamp of the primary module machine；B, as the master
The accumulation heat pamp of module machine reaches the low-pressure lateral pressure of any compressor in very first time threshold value or the primary module machine
When rate of change △ Pa are more than or equal to the first preset value, the compressor shutdown in the primary module machine is controlled, in the primary module machine
Blower fan continue to run with, and control compressor in the first slave module machine to start shooting so that the first slave module mechanism heat fortune
OK, and after the first slave module machine heating operation the accumulation heat pamp of the first slave module machine is obtained；C, institute is worked as
The accumulation heat pamp for stating the first slave module machine reaches any compressor in the second time threshold or the first slave module machine
Low-pressure lateral pressure rate of change △ Pb when being more than or equal to first preset value, control the compressor in the first slave module machine
Shut down, the blower fan in the first slave module machine continues to run with, and returns and perform step a.
According to one embodiment of present invention, when the accumulation heat pamp of the primary module machine is not up to the very first time
When the low-pressure lateral pressure rate of change △ Pa of each compressor are respectively less than first preset value in threshold value and the primary module machine, institute
Stating control module controls the primary module machine to continue heating operation.
According to one embodiment of present invention, when the accumulation heat pamp of the first slave module machine is not up to described second
It is pre- to be respectively less than described first by the low-pressure lateral pressure rate of change △ Pb of each compressor in time threshold and the first slave module machine
If during value, the control module controls the first slave module machine to continue heating operation.
Brief 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 according to the air-cooled heat pump water chiller-heater units of one embodiment of the invention in a manner of rotation defrost
White control flow chart.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.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 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.
With reference to 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
Water pipe, the water inlet pipe of 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 multiple heating water systems such as two (the first heating water system
System and the second heating water system), each water system that heats includes compressor and air-conditioning heat exchanger, wherein, each heat water system
In air-conditioning heat exchanger such as first heat water system in air-conditioning heat exchanger and second heating water system in air-conditioning heat exchanger
A blower fan is shared, and shares same water-side heat.
That is, each air-cooled heat pump cold-hot water machine can form independent module machine, each module machine shares same
One main water route, N number of module mechanism into 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 comprises the following steps：
S1, outdoor environment temperature T4 is detected in real time, and detect the low pressure side pressure of each compressor in each module machine in real time
Power.
Wherein, outdoor environment temperature T4 can be detected by outdoor temperature sensor, and can be by being arranged on each compressor
Pressure sensor detection low-pressure lateral pressure at gas returning port.
S2, the low-pressure lateral pressure that each compressor is obtained according to the low-pressure lateral pressure of each compressor detected in real time change
Rate △ P.
Say, △ P are the back pressure rate of decay of each compressor.
S3, when air-cooled heat pump water chiller-heater units enter defrost pattern, outdoor environment temperature T4 is judged.
S4, if outdoor environment temperature T4 is more than the first preset temperature, become according to the low-pressure lateral pressure of each compressor
Rate △ P controls air-cooled heat pump water chiller-heater units are run in a manner of rotation defrost.
According to one embodiment of present invention, if outdoor environment temperature T4 is less than or equal to the first preset temperature, control
Air-cooled heat pump water chiller-heater units processed are run with conventional Defrost mode.
, wherein it is desired to explanation, the first preset temperature can be carried out according to the concrete condition of air-cooled heat pump water chiller-heater units
Demarcation.Also, conventional Defrost mode refers to air-cooled heat pump water chiller-heater units still to be carried out with normal refrigerating operaton and blowing-out machine
Defrost, that is, say, outdoor environment temperature T4 than it is relatively low when, air-cooled heat pump water chiller-heater units still by normal refrigerating operaton and are stopped
Blower fan 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, N number of mould is controlled
At least one module machine in block machine is opened, and keeps at least one module machine in N number of module machine to be in stopped status；And
The low-pressure lateral pressure rate of change △ Pa of each compressor and appointing in stopped status according to corresponding to any module machine of unlatching
The low-pressure lateral pressure rate of change △ Pb of each compressor corresponding to one module machine control any module machine of the unlatching to stop with being in
Any module machine alternating heating operation of machine state, and the blower fan in any module machine of the unlatching is kept with being in stopped status
Any module machine in blower fan continuous service, with pass through the forced-convection heat transfer of blower fan 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 stopped status, then according to each compression of detection
The back pressure parameter of machine feeds back the frosting situation of the module machine of unlatching, while by the parameter of above-mentioned detection with presetting
Condition complete the shutdown and rotation of compressor between module machine, wherein the module machine being rotated only stops compressor, not blowing-out machine, lead to
The forced-convection heat transfer for crossing blower fan is defrosted, so as to realize rotation defrost between module machine and module machine.
Therefore say, the defrosting control method of the air-cooled heat pump water chiller-heater units of the embodiment of the present invention, control air-cooled heat-pump cold
When Hot water units are run in a manner of rotation defrost, defrost is carried out without changing refrigerating operaton and blowing-out machine, but module machine it
Between switching, continue by carry out defrost using blower fan itself, so as to reduce heating defrost when heating decay, carry significantly
High heating effect, improve Consumer's Experience.
According to one embodiment of present invention, when any module machine of the unlatching is primary module machine, in stopped status
When any module machine is the first slave module machine, each compressor corresponding to any module machine according to unlatching in above-mentioned steps S5
Low-pressure lateral pressure rate of change △ Pa and any module machine in stopped status corresponding to each compressor low-pressure lateral pressure
Rate of change △ Pb control any module machine of the unlatching to replace heating operation with any module machine in stopped status and specifically wrapped
Include：A, control the compressor in primary module machine to start shooting so that primary module machine heating operation, and obtained after primary module machine heating operation
Take the accumulation heat pamp of primary module machine；B, when the accumulation heat pamp of primary module machine reaches very first time threshold value or primary module
When the low-pressure lateral pressure rate of change △ Pa of any compressor are more than or equal to the first preset value in machine, the compression in primary module machine is controlled
Machine is shut down, and the blower fan in primary module machine continues to run with, and controls the compressor in the first slave module machine to start shooting so that first from mould
Block machine heating operation, and obtain after the first slave module machine heating operation the accumulation heat pamp of the first slave module machine；C, when
The accumulation heat pamp of first slave module machine reaches the low pressure of any compressor in the second time threshold or the first slave module machine
When lateral pressure rate of change △ Pb are more than or equal to the first preset value, the compressor shutdown in the first slave module machine is controlled, first from mould
Blower fan in block machine continues to run with, and returns and perform step a.
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
Comprise the following steps：
S301, air-cooled heat pump water chiller-heater units are run after start-up command is received with heating mode.
S302, the compressor in primary module machine is controlled to open so that primary module machine heating operation.
S303, primary module machine carries out frosting accumulation timing, and obtains accumulation heat pamp ta.
S304, judge whether the low-pressure lateral pressure rate of change △ Pa of any compressor in primary module machine are pre- more than or equal to first
If value Pv.If it is, perform step S306；If not, perform step S305.Wherein, the first preset value Pv is as the case may be
Demarcated.
S305, judge to accumulate whether heat pamp ta reaches very first time threshold value.If it is, perform step S306；Such as
Fruit is no, then return to step S303, that is, says, when the accumulation heat pamp of the primary module machine be not up to the very first time threshold value and
When the low-pressure lateral pressure rate of change △ Pa of each compressor are respectively less than first preset value in the primary module machine, described in control
Primary module machine continues heating operation.Wherein, very first time threshold value can be set according to actual conditions.
S306, the compressor shutdown in primary module machine is controlled, keep the blower fan in primary module machine to continue to run with, and control the
Compressor in one slave module machine is opened so that the first slave module machine heating operation.
S307, the first slave module machine carries out frosting accumulation timing, and obtains accumulation heat pamp tb.
S308, judges whether the low-pressure lateral pressure rate of change △ Pb of any compressor in the first slave module machine are more than or equal to the
One preset value Pv.If it is, perform step S310；If not, perform step S309.
S309, judge to accumulate whether heat pamp tb reaches the second time threshold.If it is, perform step S310；Such as
Fruit is no, then return to step S307, that is, says, when the accumulation heat pamp of the first slave module machine is not up to the second time threshold
When the low-pressure lateral pressure rate of change △ Pb of each compressor are respectively less than first preset value in value and the first slave module machine,
The first slave module machine is controlled to continue heating operation.Wherein, the second time threshold can equally be set according to actual conditions.
S310, the compressor shutdown in the first slave module machine is controlled, keeps the blower fan in the first slave module machine to continue to run with,
It is then back to and performs 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
During row, it can in turn be switched between primary module machine and the first slave module machine by controlling, made using continuing to run with for blower fan itself
The heat that frost corresponding to obtaining in air-conditioning heat exchanger absorbs surrounding environment carries out defrost, and heating when heating defrost so as to reduce declines
Subtract, greatly improve heating effect, improve Consumer's 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 is also not in decay,
Improve Consumer's Experience.
The defrosting control method of air-cooled heat pump water chiller-heater units according to embodiments of the present invention, outdoor environment temperature is detected in real time
T4 is spent, and detects the low-pressure lateral pressure of each compressor in each module machine in real time, then the outdoor environment by detecting in real time
When temperature T4 judges that air-cooled heat pump water chiller-heater units are run in a manner of rotation defrost, at least one mould in N number of module machine is controlled
Block machine is opened, and keeps at least one module machine in N number of module machine to be in stopped status, then according to any module of unlatching
It is each corresponding to the low-pressure lateral pressure rate of change △ Pa of each compressor corresponding to machine and any module machine in stopped status
The low-pressure lateral pressure rate of change △ Pb of compressor control any module machine of the unlatching and any module machine in stopped status
Alternately heating operation, and keep the blower fan in any module machine of the unlatching and the wind in any module machine in stopped status
Machine continuous service, to carry out defrost by the forced-convection heat transfer of blower fan, come without being converted to refrigerating operaton and blowing-out machine
Defrost is carried out, heating decay during heating defrost is reduced, greatly improves the heating effect of air-cooled heat pump water chiller-heater units, improve and use
Experience at family.
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, first pressure detection 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
Total outlet pipe, the water inlet pipe of each module machine 100 are 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 multiple heating water systems such as two (the first heating water system
System and the second heating water system), each water system that heats includes compressor and air-conditioning heat exchanger wherein, each to heat in water system
Air-conditioning heat exchanger such as first heat water system in air-conditioning heat exchanger and second heating water system in air-conditioning heat exchanger be total to
With a blower fan, and share 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
13rd, four-way valve 14, low tension switch 15, low pressure fill the 16, first air-conditioning heat exchanger 17, electric expansion valve 18, the second heating water system
The 26, second 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
Heat exchanger 27, electric expansion valve 28.Also, the first air-conditioning heat exchanger 17 and the second air-conditioning heat exchanger 27 share a blower fan 10,
It is double-tube heat exchanger 20 that first heating water system and the second heating water system, which also share water-side heat, meanwhile, in sleeve heat exchange
Be respectively provided with the water outlet pipe part and water inlet pipe of device 20 temperature sensor (such as at water inlet pipe set temperature sensor 101 with examine
Survey water inlet water temperature), flow sensor is set in water outlet pipe part, and set between air-conditioning heat exchanger 17 and electric expansion valve 18
Temperature sensor 19, temperature sensor 29 is set between air-conditioning heat exchanger 27 and electric expansion valve 28.
In an embodiment of the present invention, the first temperature detecting module such as outdoor temperature sensor is used for outside real-time sensing chamber
Environment temperature T4, first pressure detection module (are arranged on the pressure sensor such as low tension switch at each compressor return air mouth)
For the real-time low-pressure lateral pressure for detecting each compressor in each module machine, control module is used for what basis detected in real time
The low-pressure lateral pressure of each compressor obtains the low-pressure lateral pressure rate of change △ P of each compressor, and in the air-cooled heat-pump cold
The outdoor environment temperature T4 is judged when Hot water units enter defrost pattern, wherein, if the outdoor environment temperature
T4 is more than the first preset temperature, and the control module is then according to the low-pressure lateral pressure rate of change △ P of each compressor controls
Air-cooled heat pump water chiller-heater 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,
The control module controls at least one module machine in N number of module machine to open, and keeps in N number of module machine extremely
A few module machine is in stopped status, and according to corresponding to any module machine of unlatching each compressor low-pressure lateral pressure
The low-pressure lateral pressure rate of change △ Pb controls of each compressor corresponding to rate of change △ Pa and any module machine in stopped status
Any module machine for making the unlatching replaces heating operation with any module machine in stopped status, and keeps any of the unlatching
Blower fan in module machine and the blower fan continuous service in any module machine in stopped status, to pass through the forced convertion of blower fan
Heat exchange carries out defrost.
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 then controls the air-cooled heat pump water chiller-heater units to be removed with conventional
White mode is run.
, wherein it is desired to explanation, the first preset temperature can be carried out according to the concrete condition of air-cooled heat pump water chiller-heater units
Demarcation.Also, conventional Defrost mode refers to air-cooled heat pump water chiller-heater units still to be carried out with normal refrigerating operaton and blowing-out machine
Defrost, that is, say, outdoor environment temperature T4 than it is relatively low when, air-cooled heat pump water chiller-heater units still by normal refrigerating operaton and are stopped
Blower fan 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
When any module machine of state is the first slave module machine, the control module is realized by following control flow controls the main mould
Block machine and the first slave module machine alternating heating operation：
A, the compressor in the primary module machine is controlled to start shooting so that the primary module machine heating operation, and in the main mould
The accumulation heat pamp of the primary module machine is obtained after block machine heating operation；
B, when the accumulation heat pamp of the primary module machine reaches any in very first time threshold value or the primary module machine
When the low-pressure lateral pressure rate of change △ Pa of compressor are more than or equal to the first preset value, the compressor in the primary module machine is controlled to stop
Machine, the blower fan in the primary module machine continue to run with, and control the compressor in the first slave module machine to start shooting so that described
First slave module machine heating operation, and the tired of the first slave module machine is obtained after the first slave module machine heating operation
Product heat pamp；
C, when the accumulation heat pamp of the first slave module machine reaches the second time threshold or first slave module
When the low-pressure lateral pressure rate of change △ Pb of any compressor are more than or equal to first preset value in machine, described first is controlled from mould
Compressor shutdown in block machine, the blower fan in the first slave module machine continue to run with, and return and perform step a.
Also, when the accumulation heat pamp of the primary module machine is not up to the very first time threshold value and the primary module machine
In the low-pressure lateral pressure rate of change △ Pa of each compressor when being respectively less than first preset value, described in the control module control
Primary module machine continues heating operation.When the accumulation heat pamp of the first slave module machine be not up to second time threshold and
It is described when the low-pressure lateral pressure rate of change △ Pb of each compressor are respectively less than first preset value in the first slave module machine
Control module controls the first slave module machine to continue heating operation.
In summary, 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 such as primary module machine and the first slave module machine by switching in turn between control module machine, utilize blower fan itself
Continue to run with and heat that the frost corresponding to causing in air-conditioning heat exchanger absorbs surrounding environment carries out defrost, so as to reduce heating
Heating decay during defrost, greatly improves heating effect, improves Consumer's Experience.
Air-cooled heat pump water chiller-heater units according to embodiments of the present invention, when being run in a manner of rotation defrost, control module
Control at least one module machine in N number of module machine to open, and keep at least one module machine in N number of module machine to be in and shut down
State, then low-pressure lateral pressure rate of change △ Pa of each compressor and in shutdown according to corresponding to any module machine of unlatching
The low-pressure lateral pressure rate of change △ Pb of each compressor control any module machine of the unlatching corresponding to any module machine of state
Replace heating operation with any module machine in stopped status, and keep the blower fan in any module machine of the unlatching with being in
Blower fan continuous service in any module machine of stopped status, to carry out defrost by the forced-convection heat transfer of blower fan, that is, pass through
Switching between module machine, carry out defrost is continued by using blower fan itself, without by change refrigerating operaton and
Blowing-out machine carries out defrost, reduces heating decay during heating defrost, greatly improves heating effect, improve Consumer's Experience.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " up time
The orientation or position relationship of the instruction such as pin ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " be based on orientation shown in the drawings or
Position relationship, it is for only for ease of and describes the present invention and simplify description, rather than indicates or imply that signified 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 only used for describing purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the invention, " multiple " are meant that at least two, such as two, three
It is individual etc., unless otherwise specifically defined.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be that machinery connects
Connect or electrically connect；Can be joined directly together, can also be indirectly connected by intermediary, can be in two elements
The connection in portion or the interaction relationship of two elements, limited unless otherwise clear and definite.For one of ordinary skill in the art
For, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature can be with "above" or "below" second feature
It is that the first and second features directly 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 are directly over second feature or oblique upper, 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 immediately below second feature or obliquely downward, 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 the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be with office
Combined in an appropriate manner in one or more embodiments or example.In addition, in the case of not conflicting, the skill of this area
Art personnel can be tied the different embodiments or example and the feature of different embodiments or example described in this specification
Close and combine.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changed, replacing and modification.
Claims (12)
- A kind of 1. defrosting control method of air-cooled heat pump water chiller-heater units, it is characterised 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 pump water chiller-heater unit, the water inlet pipe of each module machine are 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, each module machine includes multiple heating water systems, often The individual heating water system includes compressor and air-conditioning heat exchanger, and the defrosting control method comprises the following steps：Detection outdoor environment temperature T4 in real time, and the low-pressure lateral pressure of each compressor in each module machine is detected in real time；The low-pressure lateral pressure rate of change △ P of each compressor are obtained according to the low-pressure lateral pressure of each compressor 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, according to the low-pressure lateral pressure rate of change of each compressor △ P control the air-cooled heat pump water chiller-heater units to be run in a manner of rotation defrost.
- 2. the defrosting control method of air-cooled heat pump water chiller-heater units as claimed in claim 1, it is characterised in that when described air-cooled When heat pump water chiller-heater unit is run in a manner of rotation defrost, wherein,Control at least one module machine in N number of module machine to open, and keep at least one mould in N number of module machine Block machine is in stopped status；AndThe low-pressure lateral pressure rate of change △ Pa of each compressor and in stopped status according to corresponding to any module machine of unlatching Any module machine corresponding to the low-pressure lateral pressure rate of change △ Pb of each compressor control any module machine and the place of the unlatching Replace heating operation in any module machine of stopped status, and keep the blower fan in any module machine of the unlatching to be shut down with being in Blower fan continuous service in any module machine of state, to carry out defrost by the forced-convection heat transfer of blower fan.
- 3. the defrosting control method of air-cooled heat pump water chiller-heater units as claimed in claim 1, it is characterised in that also 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, it is characterised in that when the unlatching It is described according to unlatching when any module machine is primary module machine, any module machine in stopped status is the first slave module machine The low-pressure lateral pressure rate of change △ Pa of each compressor corresponding to any module machine and any module machine pair in stopped status The low-pressure lateral pressure rate of change △ Pb for each compressor answered control any module machine of the unlatching and appointing in stopped status One module machine alternating heating operation specifically includes：A, the compressor in the primary module machine is controlled to start shooting so that the primary module machine heating operation, and in the primary module machine The accumulation heat pamp of the primary module machine is obtained after heating operation；B, when the accumulation heat pamp of the primary module machine reaches any compression in very first time threshold value or the primary module machine When the low-pressure lateral pressure rate of change △ Pa of machine are more than or equal to the first preset value, the compressor shutdown in the primary module machine is controlled, Blower fan in the primary module machine continues to run with, and controls the compressor in the first slave module machine to start shooting so that described first Slave module machine heating operation, and obtain after the first slave module machine heating operation the accumulation knot of the first slave module machine The white time；C, when the accumulation heat pamp of the first slave module machine reaches in the second time threshold or the first slave module machine When the low-pressure lateral pressure rate of change △ Pb of any compressor are more than or equal to first preset value, the first slave module machine is controlled In compressor shutdown, the blower fan in the first slave module machine continues to run with, and returns and perform step a.
- 5. the defrosting control method of air-cooled heat pump water chiller-heater units as claimed in claim 4, it is characterised in that the basis is opened The low-pressure lateral pressure rate of change △ Pa of each compressor corresponding to any module machine opened and any module in stopped status The low-pressure lateral pressure rate of change △ Pb of each compressor corresponding to machine control any module machine of the unlatching and are in stopped status Any module machine alternating heating operation specifically also include：Each pressed when the accumulation heat pamp of the primary module machine is not up in the very first time threshold value and the primary module machine When the low-pressure lateral pressure rate of change △ Pa of contracting machine are respectively less than first preset value, the primary module machine is controlled to continue heating fortune OK.
- 6. the defrosting control method of air-cooled heat pump water chiller-heater units as claimed in claim 4, it is characterised in that the basis is opened The low-pressure lateral pressure rate of change △ Pa of each compressor corresponding to any module machine opened and any module in stopped status The low-pressure lateral pressure rate of change △ Pb of each compressor corresponding to machine control any module machine of the unlatching and are in stopped status Any module machine alternating heating operation specifically also include：When the accumulation heat pamp of the first slave module machine is not up to second time threshold and the first slave module machine In the low-pressure lateral pressure rate of change △ Pb of each compressor when being respectively less than first preset value, control the first slave module machine Continue heating operation.
- A kind of 7. air-cooled heat pump water chiller-heater units, it is characterised in that including：N number of module machine, the outlet pipe of each module machine are each individually connected to always going out for the air-cooled heat pump water chiller-heater units Water pipe, 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, with reality Existing N number of module machine is connected in parallel, wherein, each module machine includes multiple heating water systems, each water heating System includes compressor and air-conditioning heat exchanger, and N is the integer more than or equal to 2；First temperature detecting module, for detecting outdoor environment temperature T4 in real time；First pressure detection module, for detecting the low-pressure lateral pressure of each compressor in each module machine in real time；Control module, for obtaining the low pressure side pressure of each compressor according to the low-pressure lateral pressure of each compressor detected in real time Power rate of change △ P, and the outdoor environment temperature T4 is carried out when the air-cooled heat pump water chiller-heater units enter defrost pattern Judge, wherein,If the outdoor environment temperature T4 is more than the first preset temperature, the control module is then according to the low pressure of each compressor Lateral pressure rate of change △ P control the air-cooled heat pump water chiller-heater units to be run in a manner of rotation defrost.
- 8. air-cooled heat pump water chiller-heater units as claimed in claim 7, it is characterised 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 module machine in N number of module machine to open, and protects Hold at least one module machine in N number of module machine and be in stopped status, and according to corresponding to any module machine of unlatching Each compressor corresponding to each low-pressure lateral pressure rate of change △ Pa of compressor and any module machine in stopped status Low-pressure lateral pressure rate of change △ Pb control any module machine of the unlatching to replace heating with any module machine in stopped status Operation, and keep the blower fan in any module machine of the unlatching persistently to be transported with the blower fan in any module machine in stopped status OK, with pass through the forced-convection heat transfer of blower fan carry out defrost.
- 9. air-cooled heat pump water chiller-heater units as claimed in claim 7, it is characterised in that when the air-cooled heat pump water chiller-heater units During 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 be run with conventional Defrost mode.
- 10. air-cooled heat pump water chiller-heater units as claimed in claim 8, it is characterised in that when any module machine of the unlatching is When primary module machine, any module machine in stopped status are the first slave module machine, the control module passes through following controlling stream Cheng Shixian controls the primary module machine and the first slave module machine alternating heating operation：A, the compressor in the primary module machine is controlled to start shooting so that the primary module machine heating operation, and in the primary module machine The accumulation heat pamp of the primary module machine is obtained after heating operation；B, when the accumulation heat pamp of the primary module machine reaches any compression in very first time threshold value or the primary module machine When the low-pressure lateral pressure rate of change △ Pa of machine are more than or equal to the first preset value, the compressor shutdown in the primary module machine is controlled, Blower fan in the primary module machine continues to run with, and controls the compressor in the first slave module machine to start shooting so that described first Slave module machine heating operation, and obtain after the first slave module machine heating operation the accumulation knot of the first slave module machine The white time；C, when the accumulation heat pamp of the first slave module machine reaches in the second time threshold or the first slave module machine When the low-pressure lateral pressure rate of change △ Pb of any compressor are more than or equal to first preset value, the first slave module machine is controlled In compressor shutdown, the blower fan in the first slave module machine continues to run with, and returns and perform step a.
- 11. air-cooled heat pump water chiller-heater units as claimed in claim 10, it is characterised in that when the accumulation knot of the primary module machine The white time is not up to the low-pressure lateral pressure rate of change △ Pa of each compressor in the very first time threshold value and the primary module machine Respectively less than first preset value when, the control module controls the primary module machine to continue heating operation.
- 12. air-cooled heat pump water chiller-heater units as claimed in claim 10, it is characterised in that when tiring out for the first slave module machine The low-pressure lateral pressure that product heat pamp is not up to each compressor in second time threshold and the first slave module machine becomes When rate △ Pb are respectively less than first preset value, the control module controls the first slave module machine to continue heating operation.
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|---|---|---|---|
| CN201510617615.3A CN105115210B (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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| CN201510617615.3A CN105115210B (en) | 2015-09-23 | 2015-09-23 | Air-cooled heat pump water chiller-heater units and its defrosting control method |
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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 |
| EP3637016B1 (en) * | 2017-06-09 | 2021-09-01 | Mitsubishi Electric Corporation | Equipment that uses heat pump |
| CN108224679B (en) * | 2017-11-29 | 2020-04-10 | 宁波奥克斯电气股份有限公司 | Multi-split self-adaptive defrosting control method and device |
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| US4332137A (en) * | 1979-10-22 | 1982-06-01 | Carrier Corporation | Heat exchange apparatus and method having two refrigeration circuits |
| KR20050026594A (en) * | 2003-09-09 | 2005-03-15 | 삼성전자주식회사 | Multi chamber type air conditioner and method for controlling the multi chamber type air conditioner |
| WO2012168971A1 (en) * | 2011-06-08 | 2012-12-13 | 三菱電機株式会社 | Refrigeration air-conditioning device |
| CN102840629B (en) * | 2011-06-20 | 2016-02-03 | 珠海格力电器股份有限公司 | Heat pump type air conditioning system |
| CN104729029B (en) * | 2013-12-24 | 2018-05-11 | 珠海格力电器股份有限公司 | Air-conditioning system and its control method |
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Application publication date: 20151202 Assignee: HEFEI MIDEA HEATING & VENTILATING EQUIPMENT Co.,Ltd. Assignor: Guangdong Midea HVAC Equipment Co., Ltd.|Midea Group Co., Ltd Contract record no.: X2020990000170 Denomination of invention: Air cooled heat pump cold and hot water unit and defrosting control method thereof Granted publication date: 20171208 License type: Common License Record date: 20200409 |
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