CN107120786A - The control method and device of machine restricting element in air conditioner and air conditioner - Google Patents
The control method and device of machine restricting element in air conditioner and air conditioner Download PDFInfo
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- CN107120786A CN107120786A CN201710242276.4A CN201710242276A CN107120786A CN 107120786 A CN107120786 A CN 107120786A CN 201710242276 A CN201710242276 A CN 201710242276A CN 107120786 A CN107120786 A CN 107120786A
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Abstract
The invention discloses the control method and device of interior machine restricting element in a kind of air conditioner and air conditioner, it the described method comprises the following steps：When the heating operation for receiving indoor set is instructed, compressor stable operation is controlled such that to compressor according to the target exhaust pressure of compressor, and obtains after compressor stable operation current exhaust pressure, current back pressure and the current exhaust degree of superheat of compressor；The initial target discharge superheat coefficient of compressor is obtained according to current outdoor environment temperature；And the initial target discharge superheat of compressor is obtained according to initial target discharge superheat coefficient, the current exhaust pressure of compressor and current back pressure, and the aperture of the interior machine restricting element of the indoor set is adjusted according to initial target discharge superheat and the current exhaust degree of superheat, so that the heating effect for heating interior machine at a temperature of different outdoor environments is effectively ensured.
Description
Technical field
The present invention relates to air-conditioning technical field, in more particularly to a kind of air conditioner in machine restricting element control method, one
Plant the control device and a kind of air conditioner of machine restricting element in computer-readable recording medium, a kind of air conditioner.
Background technology
Generally, in air conditioner (especially multiple on-line system) heating operation, it is necessary to opening to the restricting element of indoor set
Degree is adjusted in real time, and energy need are heated to meet difference.But, during the restricting element of indoor set is adjusted,
If regulation is improper, the heating effect of indoor set can be largely effected on.
The content of the invention
It is contemplated that at least solving one of technical problem in correlation technique to a certain extent.
Therefore, first purpose of the present invention is to propose a kind of control method of machine restricting element in air conditioner, lead to
The initial target discharge superheat that compressor is obtained according to current outdoor environment temperature is crossed, and according to initial target discharge superheat
The aperture of the interior machine restricting element of indoor set is adjusted with the current exhaust degree of superheat, interior machine is heated not so as to be effectively ensured
With the heating effect under outdoor environment temperature.
Second object of the present invention is to propose a kind of computer-readable recording medium.
Third object of the present invention is to propose a kind of control device of machine restricting element in air conditioner.
Fourth object of the present invention is to propose a kind of air conditioner.
To achieve the above object, first aspect present invention embodiment proposes a kind of control of machine restricting element in air conditioner
Method processed, the air conditioner includes indoor set and outdoor unit, and the indoor set includes interior machine restricting element, and the outdoor unit includes
Compressor, the described method comprises the following steps：When the heating operation for receiving the indoor set is instructed, the compressor is obtained
Target exhaust pressure, and be controlled such that the compressor is stable to the compressor according to the target exhaust pressure and transport
OK, and after the compressor stable operation current exhaust pressure of the compressor, current back pressure and current are obtained
Discharge superheat；Current outdoor environment temperature is obtained, and the first of the compressor is obtained according to the current outdoor environment temperature
Beginning target exhaust degree of superheat coefficient；And according to the initial target discharge superheat coefficient, the current exhaust of the compressor
Pressure and current back pressure obtain the initial target discharge superheat of the compressor, and are vented according to the initial target
The aperture of the interior machine restricting element of the indoor set is adjusted for temperature and the current exhaust degree of superheat.
The control method of machine restricting element in air conditioner according to embodiments of the present invention, when receiving heating for indoor set
During operating instruction, the target exhaust pressure of compressor is obtained, and pressure is controlled such that to compressor according to target exhaust pressure
Contracting machine stable operation, and obtain the current exhaust pressure of compressor, current back pressure after compressor stable operation and work as
The front exhaust degree of superheat, meanwhile, current outdoor environment temperature is obtained, and the initial of compressor is obtained according to current outdoor environment temperature
Target exhaust degree of superheat coefficient.Then, according to initial target discharge superheat coefficient, the current exhaust pressure of compressor and current
Back pressure obtains the initial target discharge superheat of compressor, and is overheated according to initial target discharge superheat and current exhaust
Spend and the aperture of the interior machine restricting element of the indoor set is adjusted, interior machine is heated in different outdoor environment temperature so as to be effectively ensured
Heating effect under degree.
According to one embodiment of present invention, the initial target discharge superheat coefficient is obtained by below equation：
A=C*T4+D,
Wherein, A is the initial target discharge superheat coefficient, and T4 is the current outdoor environment temperature, and C and D are
Constant.
According to one embodiment of present invention, the initial target discharge superheat of the compressor is obtained by below equation
Degree：
DSH=A* (Pc-Pe)+B,
Wherein, DSH is the initial target discharge superheat, and A is the initial target discharge superheat coefficient, and Pc is institute
Current exhaust pressure is stated, Pe is the current back pressure, and B is constant.
According to one embodiment of present invention, it is described according to the initial target discharge superheat and the current exhaust mistake
The aperture of the interior machine restricting element of the indoor set is adjusted temperature, including：If the current exhaust degree of superheat is less than institute
Initial target discharge superheat is stated, then carrying out aperture to the interior machine restricting element turns control down；If the current exhaust mistake
Temperature is more than the initial target discharge superheat, then carrying out aperture to the interior machine restricting element tunes up control.
According to one embodiment of present invention, during control is turned down to the interior machine restricting element progress aperture,
Also include：The outlet temperature and current indoor environment temperature of the corresponding indoor set of the interior machine restricting element are obtained, and calculates described
Temperature gap between the outlet temperature of indoor set and the current indoor environment temperature；If the temperature gap is less than first
Predetermined threshold value or the hydrops signal for receiving the indoor set, then be modified to the initial target discharge superheat, and
According to the current exhaust degree of superheat of revised initial target discharge superheat and the compressor to the interior machine restricting element
Aperture be adjusted；If the temperature gap is more than the second predetermined threshold value or does not receive the hydrops letter of the indoor set
Number, then continue to open the interior machine restricting element according to the initial target discharge superheat and the current exhaust degree of superheat
Degree is adjusted, wherein, second predetermined threshold value is more than first predetermined threshold value.
According to one embodiment of present invention, the initial target discharge superheat is subtracted the first default degree of superheat to obtain
Obtain the revised initial target discharge superheat.
To achieve the above object, second aspect of the present invention embodiment proposes a kind of computer-readable recording medium, is used for
Application program is stored, the application program is used for the control method for performing machine restricting element in above-mentioned air conditioner.
Computer-readable recording medium according to embodiments of the present invention, when the heating operation for receiving indoor set is instructed,
The target exhaust pressure of compressor is obtained, and the stable fortune of compressor is controlled such that to compressor according to target exhaust pressure
OK, and after compressor stable operation current exhaust pressure, current back pressure and the current exhaust overheat of compressor are obtained
Degree, meanwhile, current outdoor environment temperature is obtained, and the initial target for obtaining compressor according to current outdoor environment temperature was vented
Temperature coefficient.Then, obtained according to initial target discharge superheat coefficient, the current exhaust pressure of compressor and current back pressure
The initial target discharge superheat of compressor is taken, and according to initial target discharge superheat and the current exhaust degree of superheat to the interior
The aperture of the interior machine restricting element of machine is adjusted, and interior machine heating at a temperature of different outdoor environments is heated so as to be effectively ensured
Effect.
To achieve the above object, third aspect present invention embodiment proposes a kind of control of machine restricting element in air conditioner
Device processed, the air conditioner includes indoor set and outdoor unit, and the indoor set includes interior machine restricting element, and the outdoor unit includes
Compressor, the control device includes：First acquisition module, during for being instructed in the heating operation for receiving the indoor set,
The target exhaust pressure of the compressor is obtained, and the compressor is controlled such that according to the target exhaust pressure
After the compressor stable operation, current exhaust pressure, current back pressure and the current exhaust overheat of the compressor are obtained
Degree；Second acquisition module, the compressor is obtained for obtaining current outdoor environment temperature, and according to current outdoor environment temperature
Initial target discharge superheat coefficient；Control module, the control module respectively with first acquisition module and described
Two acquisition modules are connected, and the control module is used to be controlled such that institute to the compressor according to the target exhaust pressure
State compressor stable operation, and according to the initial target discharge superheat coefficient, the current exhaust pressure of the compressor and
Current back pressure obtains the initial target discharge superheat of the compressor, and according to the initial target discharge superheat and
The aperture of the interior machine restricting element of the indoor set is adjusted the current exhaust degree of superheat.
The control device of machine restricting element, is receiving heating for indoor set in air conditioner according to embodiments of the present invention
During operating instruction, by the first acquisition module obtain compressor target exhaust pressure, and according to target exhaust pressure to pressure
Contracting machine is controlled such that after compressor stable operation, obtains the current exhaust pressure of compressor, current back pressure and current
Discharge superheat.Current outdoor environment temperature is obtained by the second acquisition module, and pressure is obtained according to current outdoor environment temperature
The initial target discharge superheat coefficient of contracting machine.Then, control module is according to initial target discharge superheat coefficient, compressor
Current exhaust pressure and current back pressure obtain the initial target discharge superheat of compressor, and are vented according to initial target
The aperture of the interior machine restricting element of the indoor set is adjusted for temperature and the current exhaust degree of superheat, so that in being effectively ensured and heating
Heating effect of the machine at a temperature of different outdoor environments.
According to one embodiment of present invention, second acquisition module obtains the initial target by below equation and arranged
Gas degree of superheat coefficient：
A=C*T4+D,
Wherein, A is the initial target discharge superheat coefficient, and T4 is the current outdoor environment temperature, and C and D are
Constant.
According to one embodiment of present invention, the control module obtains the initial mesh of the compressor by below equation
Mark discharge superheat：
DSH=A* (Pc-Pe)+B,
Wherein, DSH is the initial target discharge superheat, and A is the initial target discharge superheat coefficient, and Pc is institute
Current exhaust pressure is stated, Pe is the current back pressure, and B is constant.
According to one embodiment of present invention, the control module is according to the initial target discharge superheat and described
When the aperture of the interior machine restricting element of the indoor set is adjusted the current exhaust degree of superheat, wherein, if the current exhaust
The degree of superheat is less than the initial target discharge superheat, and the control module then carries out aperture to the interior machine restricting element and turned down
Control；If the current exhaust degree of superheat is more than the initial target discharge superheat, the control module is then to described interior
Machine restricting element carries out aperture and tunes up control.
According to one embodiment of present invention, during control is turned down to the interior machine restricting element progress aperture,
The control module also obtains the outlet temperature and current indoor environment temperature of the corresponding indoor set of the interior machine restricting element, and counts
The temperature gap between the outlet temperature of the indoor set and the current indoor environment temperature is calculated, wherein, if the temperature
Difference is less than the first predetermined threshold value or the control module receives the hydrops signal of the indoor set, and the control module is then
The initial target discharge superheat is modified, and according to revised initial target discharge superheat and the compressor
The current exhaust degree of superheat aperture of the interior machine restricting element is adjusted；Preset if the temperature gap is more than second
Threshold value or the control module do not receive the hydrops signal of the indoor set, and the control module then continues according to described first
The aperture of the interior machine restricting element is adjusted for the beginning target exhaust degree of superheat and the current exhaust degree of superheat, wherein, institute
The second predetermined threshold value is stated more than first predetermined threshold value.
According to one embodiment of present invention, that the initial target discharge superheat is subtracted into first is pre- for the control module
If the degree of superheat is to obtain the revised initial target discharge superheat.
In addition, embodiments of the invention also proposed a kind of air conditioner, it includes machine throttling member in above-mentioned air conditioner
The control device of part.
The air conditioner of the embodiment of the present invention, by above-mentioned control device, can effectively ensure that and heat interior machine in different chamber
Heating effect at a temperature of external environment, it is ensured that system stable operation.
Brief description of the drawings
Fig. 1 is the structural representation of air conditioner according to an embodiment of the invention；
Fig. 2 is the flow chart of the control method of interior machine restricting element in air conditioner according to an embodiment of the invention；
Temperature changing curve diagram when Fig. 3 is indoor set hydrops；
Fig. 4 be in the air conditioner according to a specific example of the invention in machine restricting element control method flow chart；
And
Fig. 5 is the block diagram of the control device of interior machine restricting element in air conditioner according to embodiments of the present invention.
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 be not considered as limiting the invention.
With reference to the accompanying drawings in the air conditioner to describe the embodiment of the present invention in the control method of machine restricting element, computer
The control device and air conditioner of machine restricting element in readable storage medium storing program for executing, air conditioner.
In an embodiment of the present invention, air conditioner may include indoor set (can be one or more) and outdoor unit, indoor
Machine may include interior machine restricting element, and outdoor unit may include compressor.
Specifically, so that air conditioner has an indoor set as an example.As shown in figure 1, when air conditioner is run with heating mode
High-pressure gaseous refrigerant in (when indoor set is multiple, air conditioner is run with pure heating mode), outdoor unit high-voltage tube is entered to enter the room
Interior machine, after machine heat release indoors, outdoor unit is returned to by interior machine restricting element reducing pressure by regulating flow into low-pressure gaseous refrigerant.Wherein, it is interior
The aperture of machine restricting element can not only influence the cold medium flux for the machine of getting in, while the condensation temperature of indoor set can be also influenceed,
Therefore suitable aperture can make indoor set both have higher cold medium flux simultaneously or have higher condensation temperature, so as to export
Higher heating capacity, energy need are heated to meet.
And in order to reach more preferable heating effect, indoor set operating mode in identical room is heated even for same
Under, when outdoor environment temperature changes, the aperture of interior machine restricting element be also required to the change according to outdoor environment temperature and
Change, can so obtain more preferable heating effect.Therefore, in an embodiment of the present invention, also by current outdoor environment temperature
The aperture for carrying out internal machine restricting element as one of parameter is spent to be adjusted.
Fig. 2 is the flow chart of the control method of interior machine restricting element in air conditioner according to an embodiment of the invention.Such as
Shown in Fig. 2, the control method of interior machine restricting element may include following steps in the air conditioner：
S1, when the heating operation for receiving indoor set is instructed, obtains the target exhaust pressure of compressor, and according to target
Pressure at expulsion is controlled such that compressor stable operation, and the acquisition compressor after compressor stable operation to compressor
Current exhaust pressure, current back pressure and the current exhaust degree of superheat.
Specifically, as shown in figure 1, when indoor set receives heating operation instruction, indoor set hair heats energy need to be to room
Outer machine, outdoor unit can need to obtain target exhaust pressure Pcs (or the corresponding saturations of target exhaust pressure of compressor according to heating
Temperature Tcs), and compressor is carried out according to target exhaust pressure Pcs (or the corresponding saturation temperature Tcs of target exhaust pressure)
Control, so that compressor is run according to the frequency of calculating.
After compressor stable operation, pass through the pressure sensor being separately positioned at exhaust outlet of compressor and at gas returning port
The current exhaust pressure Pc and current back pressure Pe of compressor are obtained, and is passed by being arranged on the temperature at exhaust outlet of compressor
Sensor obtains the current exhaust gas temperature Tp of compressor.Then, according to the current exhaust gas temperature Tp and current exhaust pressure of compressor
Corresponding saturation temperature Tc calculates the current exhaust degree of superheat DSH1 of compressor, wherein, DSH1=Tp-Tc.
S2, obtains current outdoor environment temperature, and the initial target for obtaining compressor according to current outdoor environment temperature is arranged
Gas degree of superheat coefficient.
According to one embodiment of present invention, the initial target discharge superheat of compressor can be obtained by following formula (1)
Spend coefficient：
A=C*T4+D (1)
Wherein, A is initial target discharge superheat coefficient, and T4 is current outdoor environment temperature, and C and D are constant, C and D
It can be obtained according to experiment test.
S3, is obtained according to initial target discharge superheat coefficient, the current exhaust pressure of compressor and current back pressure
The initial target discharge superheat of compressor, and according to initial target discharge superheat and the current exhaust degree of superheat to the indoor set
The aperture of interior machine restricting element be adjusted.
According to one embodiment of present invention, the initial target discharge superheat of compressor can be obtained by following formula (2)
Degree：
DSH=A* (Pc-Pe)+B (2)
Wherein, DSH is initial target discharge superheat, and A is initial target discharge superheat coefficient, and Pc is current exhaust pressure
Power, Pe is current back pressure, and B is constant, and B can be obtained according to experiment test.
That is, when obtaining the target exhaust degree of superheat of compressor, obtaining corresponding according to current outdoor environment temperature
Corrected parameter (i.e. initial target discharge superheat coefficient A), and the target exhaust of compressor is overheated according to the corrected parameter
Degree is modified, so that during follow-up internally machine restricting element aperture regulation, can make the aperture of interior machine restricting element expires
Sufficient current outdoor environment temperature so that indoor set obtains more preferable heating effect.
According to one embodiment of present invention, according to initial target discharge superheat and the current exhaust degree of superheat to the interior
The aperture of the interior machine restricting element of machine is adjusted, including：If the current exhaust degree of superheat is less than initial target discharge superheat,
Then internal machine restricting element carries out aperture and turns control down；If the current exhaust degree of superheat is more than initial target discharge superheat,
Internal machine restricting element carries out aperture and tunes up control.
Specifically, after initial target discharge superheat coefficient A is obtained according to above-mentioned formula (1), according to above-mentioned formula
(2) calculate initial target discharge superheat DSH, i.e. DSH=A* (Pc-Pe) under current outdoor environment temperature T4 operating modes+
B；Or, according to initial target discharge superheat coefficient A, the corresponding saturation temperature Tc of current exhaust pressure and current back pressure
Corresponding saturation temperature Te calculates initial target discharge superheat DSH, i.e. DSH under current outdoor environment temperature T4 operating modes
=A* (Tc-Te)+B.
Then, according to the initial target discharge superheat DSH and current exhaust mistake under current outdoor environment temperature T4 operating modes
The aperture of machine restricting element carries out PI regulations in temperature DSH1 relation pair.Wherein, as DSH1 ＜ DSH, then interior machine is throttled
The aperture of element is gradually turned down, to improve the delivery temperature Tp of compressor, and then improves heating capacity；As DSH1 ＞ DSH, then
The aperture of interior machine restricting element is gradually tuned up, to reduce the delivery temperature Tp of compressor, and then heating capacity is reduced, until compression
Actual exhaust air degree of superheat DSH1 ＇=DSH of machine, obtains the optimal aperture of interior machine restricting element.
Therefore, in air conditioner according to embodiments of the present invention in machine restricting element control method, can be according to working as cup
External environment temperature obtains the initial target discharge superheat of compressor, and according to initial target discharge superheat and discharge superheat
Aperture to the interior machine restricting element of the indoor set is adjusted, so as to when outdoor environment temperature changes, in real time
The aperture of internal machine restricting element is adjusted, to reach more preferable heating effect.
Further, during internal machine restricting element progress aperture turns control down, if interior machine restricting element
Aperture is too small, then the cold medium flux of system is less.When a small amount of refrigerant flows into indoor set, it may appear that premature condensation causes interior
Machine hydrops, now the liquid refrigerants in indoor set in indoor heat exchanger be cooled quickly so that indoor set and room air heat exchange
Effect is deteriorated, and heats leaving air temp step-down, or even causes to heat leaving air temp and indoor environment temperature very close to having a strong impact on easypro
Appropriateness.As shown in figure 3, when interior machine restricting element aperture is too small cause indoor set hydrops when, heat leaving air temp close to indoor ring
Border temperature, and indoor heat exchanger outlet temperature closer to indoor environment temperature.Also, when indoor set is on and liquid
When refrigerant blocks alternate process, refrigerant circulation flow velocity can be suddenly big or suddenly small, causes to heat leaving air temp appearance height fluctuation.
Therefore, carried out in internal machine restricting element during aperture turns control down, can be according to the outlet temperature of indoor set
The aperture for carrying out internal machine restricting element with indoor environment temperature is adjusted, and effectively prevents indoor set from hydrops phenomenon occur, simultaneously
Ensure the heating effect of indoor set.
According to one embodiment of present invention, during internal machine restricting element progress aperture turns control down, also wrap
Include：The outlet temperature and current indoor environment temperature of the corresponding indoor set of the interior machine restricting element are obtained, and calculates indoor set
Temperature gap between outlet temperature and current indoor environment temperature；If temperature gap is less than the first predetermined threshold value or reception
To the hydrops signal of indoor set, then initial target discharge superheat is modified, and be vented according to revised initial target
The degree of superheat and the aperture of the internal machine restricting element of the current exhaust degree of superheat of compressor are adjusted；If temperature gap is more than the
Two predetermined threshold values or the hydrops signal for not receiving indoor set, then continue according to initial target discharge superheat and current exhaust
The aperture of the internal machine restricting element of the degree of superheat is adjusted.Wherein, the second predetermined threshold value is more than the first predetermined threshold value, and first presets
Threshold value and the second predetermined threshold value can be demarcated according to actual conditions.
In an embodiment of the present invention, initial target discharge superheat is subtracted the first default degree of superheat to obtain after amendment
Initial target discharge superheat, wherein, when revised initial target discharge superheat is not less than compressor safe operation
The target exhaust degree of superheat, the first default degree of superheat can be demarcated according to actual conditions.
Specifically, during the aperture of internal machine restricting element is turned down, the interior machine restricting element is also obtained in real time
The outlet temperature T2 and current indoor environment temperature T1 of corresponding indoor set, and the difference of calculating between the two, i.e. T2-T1, so
The difference is judged afterwards.
If T2-T1 ＞ the second predetermined threshold value G, or outdoor unit do not receive the hydrops signal of indoor set, then continue root
The aperture of interior machine restricting element is carried out turning control down according to initial target discharge superheat DSH and current exhaust degree of superheat DSH1,
Until the actual exhaust air degree of superheat DSH1 ＇ of compressor are equal to initial target discharge superheat DSH, stop internal machine restricting element
Aperture regulation, now, the aperture of interior machine restricting element are optimal aperture, system stable operation.
If T2-T1 ＜ the first predetermined threshold value E, or outdoor unit receive the corresponding indoor set of the interior machine restricting element
Hydrops signal, then be modified to smaller desired value by initial target discharge superheat DSH, e.g., revised initial target exhaust
Degree of superheat DSH ＇=initial target discharge superheat DSH- first presets degree of superheat F.Then, arranged according to revised initial target
The aperture of interior machine restricting element is adjusted gas degree of superheat DSH ＇ and current exhaust degree of superheat DSH1.Machine restricting element in so
Aperture can gradually tune up so that refrigerant circulation more preferably, so as to exclude the hydrops of indoor set.
Further, according to revised initial target discharge superheat DSH ＇ to the aperture of interior machine restricting element gradually
During tuning up, if the second predetermined threshold values of T2-T1 ＞ G (G ＞ E), or outdoor unit do not receive the hydrops letter of indoor set
Number, then stop tuning up the aperture of interior machine restricting element, now actual exhaust air degree of superheat DSH1 ＇ of compressor=revised initial
Target exhaust degree of superheat DSH ＇.It is delayed after a period of time, state and the aperture of interior machine restricting element again to indoor set are carried out
Detection, if occurring indoor set hydrops or T2-T1 ＜ E again, reduces revised initial target discharge superheat again,
Until the aperture of interior machine restricting element is stable in some optimal aperture, it so will not both cause indoor set hydrops, will not also make
The delivery temperature of compressor is too low and influences heating effect.
Therefore, in air conditioner according to embodiments of the present invention in machine restricting element control method, throttled member in internal machine
During the aperture of part is turned down, judged by outlet temperature and indoor environment temperature to indoor set, and carried out corresponding
Regulation so that ensure indoor set heating effect while, can also effectively prevent indoor set hydrops.
To make those skilled in the art be better understood upon the present invention, Fig. 4 is the sky according to a specific example of the invention
Adjust the flow chart of the control method of machine restricting element in device.As shown in figure 4, in the air conditioner machine restricting element controlling party
Method may include following steps：
S101, indoor set heating operation.
S102, obtains target exhaust pressure Pcs (or the corresponding saturation temperatures of target exhaust pressure of compressor of compressor
Tcs), and according to Pcs compressor stable operation is controlled.
S103, after compressor stable operation, obtains current exhaust pressure Pc, the current back pressure Pe of compressor and works as
Front exhaust degree of superheat DSH1.
S104, obtains current outdoor environment temperature T4.
S105, initial target discharge superheat the coefficient A, i.e. A=C*T4+D of compressor are calculated according to T4.
S106, calculate compressor initial target discharge superheat DSH=A* (Pc-Pe)+B or DSH=A* (Tc-Te)+
B。
S107, PI regulations are carried out according to machine restricting element in DSH and DSH1 relation pair.
S108, judges whether DSH1 is more than DSH.If it is, performing step S117；If not, performing step S109.
S109, the aperture of interior machine restricting element is gradually turned down.
S110, obtains the outlet temperature T2 and current indoor environment temperature T1 of the corresponding indoor set of the interior machine restricting element.
S111, judges whether T2-T1 is less than the first predetermined threshold value E, or outdoor unit receives the hydrops signal of indoor set.
If it is, performing step 112；If not, performing step S115.
S112, revised initial target discharge superheat DSH ＇=DSH- first presets degree of superheat F.
S113, judges whether T2-T1 is more than the second predetermined threshold value G, or outdoor unit does not receive the hydrops letter of indoor set
Number.If it is, performing step S114；If not, return to step S112.
S114, as actual exhaust air degree of superheat DSH1 ＇=DSH ＇ of compressor, after delay a period of time, judges room again
The aperture of the state of interior machine and interior machine restricting element, until interior machine restricting element is stable in optimal aperture.
S115, judges whether T2-T1 is more than the second predetermined threshold value G, or outdoor unit does not receive the hydrops letter of indoor set
Number.If it is, performing step S116；If not, return to step S110.
S116, as DSH1 ＇=DSH, obtains the optimal aperture of interior machine restricting element.
S117, the aperture of interior machine restricting element is gradually tuned up.
S118, as DSH1 ＇=DSH, obtains the optimal aperture of interior machine restricting element.
In summary, in air conditioner according to embodiments of the present invention in machine restricting element control method, when receiving room
During the heating operation instruction of interior machine, the target exhaust pressure of compressor is obtained, and compressor is carried out according to target exhaust pressure
Control so that compressor stable operation, and obtain after compressor stable operation the current exhaust pressure of compressor, current return
Atmospheric pressure and the current exhaust degree of superheat, meanwhile, current outdoor environment temperature is obtained, and pressure is obtained according to current outdoor environment temperature
The initial target discharge superheat coefficient of contracting machine.Then, according to initial target discharge superheat coefficient, the current exhaust of compressor
Pressure and current back pressure obtain the initial target discharge superheat of compressor, and according to initial target discharge superheat and work as
The aperture of the interior machine restricting element of the indoor set is adjusted the front exhaust degree of superheat, and interior machine is heated in difference so as to be effectively ensured
Heating effect under outdoor environment temperature.
Fig. 5 is the block diagram of the control device of interior machine restricting element in air conditioner according to embodiments of the present invention.
In embodiments of the invention, as shown in Fig. 2 air conditioner may include indoor set 10 and outdoor unit 20, indoor set 10 may include interior machine
Restricting element 11, outdoor unit 20 may include compressor 21.
As shown in figure 5, the control device of machine restricting element may include in the air conditioner：First acquisition module 100, second
Acquisition module 200 and control module 300.
Wherein, the first acquisition module 100 is used to, when the heating operation for receiving indoor set is instructed, obtain compressor 21
Target exhaust pressure, and after the stable operation of compressor 21 is controlled such that to compressor 21 according to target exhaust pressure, obtain
Take the current exhaust pressure, current back pressure and the current exhaust degree of superheat of compressor 21.Second acquisition module 200 is used to obtain
Current outdoor environment temperature, and according to the initial target discharge superheat coefficient of current outdoor environment temperature acquisition compressor 21.
Control module 300 is connected with the first acquisition module 100 and the second acquisition module 200 respectively, and control module 300 is used for according to target
Pressure at expulsion is controlled such that the stable operation of compressor 21 to compressor 21, and according to initial target discharge superheat coefficient,
The current exhaust pressure of compressor 21 and current back pressure obtain the initial target discharge superheat of compressor 21, and according to first
The aperture of the interior machine restricting element 11 of the indoor set 10 is adjusted for the beginning target exhaust degree of superheat and the current exhaust degree of superheat.
According to one embodiment of present invention, the second acquisition module 200 obtains initial target by above-mentioned formula (1) and is vented
Degree of superheat coefficient.
According to one embodiment of present invention, control module 300 obtains the initial mesh of compressor 21 by above-mentioned formula (2)
Mark discharge superheat.
According to one embodiment of present invention, control module 300 is according to initial target discharge superheat and current exhaust
When the aperture of the interior machine restricting element 11 of the indoor set 10 is adjusted the degree of superheat, wherein, if the current exhaust degree of superheat is small
In initial target discharge superheat, then the internal progress of machine restricting element 11 aperture turns control down to control module 300；If when front row
The gas degree of superheat is more than initial target discharge superheat, and then the internal progress of machine restricting element 11 aperture tunes up control to control module 300.
According to one embodiment of present invention, during internal machine restricting element 11 progress aperture turns control down, control
Molding block 300 also obtains the outlet temperature and current indoor environment temperature of the corresponding indoor set 10 of the interior machine restricting element 11, and
The temperature gap between the outlet temperature and current indoor environment temperature of indoor set 10 is calculated, wherein, if temperature gap is less than
First predetermined threshold value or control module 300 receive the hydrops signal of indoor set 10, and control module 300 is then arranged initial target
The gas degree of superheat is modified, and according to the current exhaust degree of superheat pair of revised initial target discharge superheat and compressor 21
The aperture of interior machine restricting element 11 is adjusted；If temperature gap is more than the second predetermined threshold value or control module 300 does not connect
The hydrops signal of indoor set 10 is received, control module 300 then continues according to initial target discharge superheat and current exhaust overheat
The aperture for spending internal machine restricting element 11 is adjusted, wherein, the second predetermined threshold value is more than the first predetermined threshold value.
According to one embodiment of present invention, initial target discharge superheat is subtracted first and preset by control module 300
Temperature is to obtain revised initial target discharge superheat.
It should be noted that what is do not disclosed in the control device of machine restricting element in the air conditioner of the embodiment of the present invention is thin
Section, refer to the details disclosed in the control method of machine restricting element in the air conditioner of the embodiment of the present invention, specifically here
Repeat no more.
The control device of machine restricting element, is receiving heating for indoor set in air conditioner according to embodiments of the present invention
During operating instruction, by the first acquisition module obtain compressor target exhaust pressure, and according to target exhaust pressure to pressure
Contracting machine is controlled such that after compressor stable operation, obtains the current exhaust pressure of compressor, current back pressure and current
Discharge superheat.Current outdoor environment temperature is obtained by the second acquisition module, and pressure is obtained according to current outdoor environment temperature
The initial target discharge superheat coefficient of contracting machine.Then, control module is according to initial target discharge superheat coefficient, compressor
Current exhaust pressure and current back pressure obtain the initial target discharge superheat of compressor, and are vented according to initial target
The aperture of the interior machine restricting element of the indoor set is adjusted for temperature and the current exhaust degree of superheat, so that in being effectively ensured and heating
Heating effect of the machine at a temperature of different outdoor environments.
In addition, embodiments of the invention also proposed a kind of computer-readable recording medium, should for storing application program
It is used for the control method for performing machine restricting element in above-mentioned air conditioner with program.
The computer-readable recording medium of the embodiment of the present invention, when the heating operation for receiving indoor set is instructed, is obtained
The target exhaust pressure of compressor, and compressor stable operation is controlled such that to compressor according to target exhaust pressure, with
And current exhaust pressure, current back pressure and the current exhaust degree of superheat of compressor are obtained after compressor stable operation, together
When, current outdoor environment temperature is obtained, and according to the initial target discharge superheat of current outdoor environment temperature acquisition compressor
Coefficient.Then, obtained and pressed according to initial target discharge superheat coefficient, the current exhaust pressure of compressor and current back pressure
The initial target discharge superheat of contracting machine, and according to initial target discharge superheat and the current exhaust degree of superheat to the indoor set
The aperture of interior machine restricting element is adjusted, and effect is heated at a temperature of different outdoor environments so as to be effectively ensured and heat interior machine
Really.
In addition, embodiments of the invention also proposed a kind of air conditioner, it includes machine throttling member in above-mentioned air conditioner
The control device of part.
The air conditioner of the embodiment of the present invention, by above-mentioned control device, can effectively ensure that and heat interior machine in different chamber
Heating effect at a temperature of external environment ensures system stable operation.
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, is for only for ease of the description present invention and simplifies description, rather than indicate or imply that the device or element of meaning 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 indicating or implying relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express 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 to by intermediary, can be in two elements
The connection in portion or the interaction relationship of two elements, unless otherwise clear and definite restriction.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 are directly contacted, 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 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 to combine specific features, structure, material or the spy that the embodiment or example are described
Point is contained at least one embodiment of the present invention or example.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 not be the same as Example or the feature of example and non-be the same as Example 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 (14)
1. the control method of machine restricting element in a kind of air conditioner, it is characterised in that the air conditioner includes indoor set and room
Outer machine, the indoor set includes interior machine restricting element, and the outdoor unit includes compressor, the described method comprises the following steps：
When the heating operation for receiving the indoor set is instructed, the target exhaust pressure of the compressor is obtained, and according to institute
State target exhaust pressure and the compressor stable operation is controlled such that to the compressor, and it is stable in the compressor
The current exhaust pressure, current back pressure and the current exhaust degree of superheat of the compressor are obtained after operation；
Current outdoor environment temperature is obtained, and the initial target for obtaining the compressor according to the current outdoor environment temperature is arranged
Gas degree of superheat coefficient；And
Obtained according to the initial target discharge superheat coefficient, the current exhaust pressure of the compressor and current back pressure
The initial target discharge superheat of the compressor, and overheated according to the initial target discharge superheat and the current exhaust
Spend and the aperture of the interior machine restricting element of the indoor set is adjusted.
2. the control method of machine restricting element in air conditioner as claimed in claim 1, it is characterised in that pass through below equation
Obtain the initial target discharge superheat coefficient：
A=C*T4+D,
Wherein, A is the initial target discharge superheat coefficient, and T4 is the current outdoor environment temperature, and C and D are constant.
3. the control method of machine restricting element in air conditioner as claimed in claim 1 or 2, it is characterised in that by following
Formula obtains the initial target discharge superheat of the compressor：
DSH=A* (Pc-Pe)+B,
Wherein, DSH is the initial target discharge superheat, and A is the initial target discharge superheat coefficient, and Pc works as to be described
Front-seat atmospheric pressure, Pe is the current back pressure, and B is constant.
4. the control method of machine restricting element in air conditioner as claimed in claim 1, it is characterised in that described in the basis
The aperture of the interior machine restricting element of the indoor set is adjusted for initial target discharge superheat and the current exhaust degree of superheat,
Including：
If the current exhaust degree of superheat is less than the initial target discharge superheat, the interior machine restricting element is carried out
Aperture turns control down；
If the current exhaust degree of superheat is more than the initial target discharge superheat, the interior machine restricting element is carried out
Aperture tunes up control.
5. the control method of machine restricting element in air conditioner as claimed in claim 4, it is characterised in that to the interior machine
During restricting element progress aperture turns control down, in addition to：
The outlet temperature and current indoor environment temperature of the corresponding indoor set of the interior machine restricting element are obtained, and calculates the interior
Temperature gap between the outlet temperature of machine and the current indoor environment temperature；
If the temperature gap is less than the first predetermined threshold value or receives the hydrops signal of the indoor set, to described first
The beginning target exhaust degree of superheat is modified, and according to revised initial target discharge superheat and the compressor when front row
The aperture of the interior machine restricting element is adjusted the gas degree of superheat；
If the temperature gap is more than the second predetermined threshold value or does not receive the hydrops signal of the indoor set, continue root
The aperture of the interior machine restricting element is adjusted according to the initial target discharge superheat and the current exhaust degree of superheat,
Wherein, second predetermined threshold value is more than first predetermined threshold value.
6. the control method of machine restricting element in air conditioner as claimed in claim 5, it is characterised in that by the initial mesh
Mark discharge superheat subtracts the first default degree of superheat to obtain the revised initial target discharge superheat.
7. a kind of computer-readable recording medium, it is characterised in that for storing application program, the application program is used to perform
The control method of machine restricting element in air conditioner any one of claim 1-6.
8. the control device of machine restricting element in a kind of air conditioner, it is characterised in that the air conditioner includes indoor set and room
Outer machine, the indoor set includes interior machine restricting element, and the outdoor unit includes compressor, and the control device includes：
First acquisition module, during for being instructed in the heating operation for receiving the indoor set, obtains the target of the compressor
Pressure at expulsion, and the compressor stable operation is being controlled such that to the compressor according to the target exhaust pressure
Afterwards, current exhaust pressure, current back pressure and the current exhaust degree of superheat of the compressor are obtained；
Second acquisition module, for obtaining current outdoor environment temperature, and according to being obtained the current outdoor environment temperature
The initial target discharge superheat coefficient of compressor；
Control module, the control module is connected with first acquisition module and second acquisition module respectively, the control
Molding block is used to be controlled such that the compressor compressor stable operation, and root according to the target exhaust pressure
Institute is obtained according to the initial target discharge superheat coefficient, the current exhaust pressure of the compressor and the current back pressure
The initial target discharge superheat of compressor is stated, and according to the initial target discharge superheat and the current exhaust degree of superheat
Aperture to the interior machine restricting element of the indoor set is adjusted.
9. the control device of machine restricting element in air conditioner as claimed in claim 8, it is characterised in that described second obtains
Module obtains the initial target discharge superheat coefficient by below equation：
A=C*T4+D,
Wherein, A is the initial target discharge superheat coefficient, and T4 is the current outdoor environment temperature, and C and D are constant.
10. the control device of machine restricting element in air conditioner as claimed in claim 8 or 9, it is characterised in that the control
Module obtains the initial target discharge superheat of the compressor by below equation：
DSH=A* (Pc-Pe)+B,
Wherein, DSH is the initial target discharge superheat, and A is the initial target discharge superheat coefficient, and Pc works as to be described
Front-seat atmospheric pressure, Pe is the current back pressure, and B is constant.
11. the control device of machine restricting element in air conditioner as claimed in claim 8, it is characterised in that the control mould
Block according to the initial target discharge superheat and the current exhaust degree of superheat to the interior machine restricting element of the indoor set
When aperture is adjusted, wherein,
If the current exhaust degree of superheat is less than the initial target discharge superheat, the control module is then to the interior machine
Restricting element carries out aperture and turns control down；
If the current exhaust degree of superheat is more than the initial target discharge superheat, the control module is then to the interior machine
Restricting element carries out aperture and tunes up control.
12. the control device of machine restricting element in air conditioner as claimed in claim 11, it is characterised in that to described interior
Machine restricting element is carried out during aperture turns control down, and the control module also obtains the corresponding interior of the interior machine restricting element
The outlet temperature and current indoor environment temperature of machine, and calculate the outlet temperature and the current indoor environment temperature of the indoor set
Temperature gap between degree, wherein,
If the temperature gap is less than the first predetermined threshold value or the control module receives the hydrops letter of the indoor set
Number, the control module is then modified to the initial target discharge superheat, and is vented according to revised initial target
The aperture of the interior machine restricting element is adjusted for the degree of superheat and the current exhaust degree of superheat of the compressor；
If the temperature gap is more than the second predetermined threshold value or the control module does not receive the hydrops of the indoor set
Signal, the control module then continues according to the initial target discharge superheat and the current exhaust degree of superheat to described interior
The aperture of machine restricting element is adjusted, wherein, second predetermined threshold value is more than first predetermined threshold value.
13. the control device of machine restricting element in air conditioner as claimed in claim 12, it is characterised in that the control mould
The initial target discharge superheat is subtracted the first default degree of superheat and was vented with obtaining the revised initial target by block
Temperature.
14. a kind of air conditioner, it is characterised in that including machine throttling in the air conditioner as any one of claim 8-13
The control device of element.
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| CN201710242276.4A CN107120786B (en) | 2017-04-12 | 2017-04-12 | The control method and device of interior machine restricting element in air conditioner and air conditioner |
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