CN107120786B - The control method and device of interior machine restricting element in air conditioner and air conditioner - Google Patents
The control method and device of interior machine restricting element in air conditioner and air conditioner Download PDFInfo
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- CN107120786B CN107120786B CN201710242276.4A CN201710242276A CN107120786B CN 107120786 B CN107120786 B CN 107120786B CN 201710242276 A CN201710242276 A CN 201710242276A CN 107120786 B CN107120786 B CN 107120786B
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Abstract
The invention discloses the control methods and device of machine restricting element interior in a kind of air conditioner and air conditioner, it the described method comprises the following steps: when the heating operation for receiving indoor unit instructs, compressor stable operation is controlled such that compressor according to the target exhaust pressure of compressor, and obtains current exhaust pressure, current back pressure and the current exhaust degree of superheat of compressor after compressor stable operation；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 unit is adjusted according to initial target discharge superheat and the current exhaust degree of superheat, so that heating effect of machine at a temperature of different outdoor environments in heating be effectively ensured.
Description
Technical field
The present invention relates to air-conditioning technical field, in particular to the control method of interior machine restricting element, one in a kind of air conditioner
The control device and a kind of air conditioner of interior machine restricting element in kind computer readable storage medium, a kind of air conditioner.
Background technique
In general, needing opening to the restricting element of indoor unit in air conditioner (especially multi-line system) heating operation
Degree is adjusted in real time, to meet different heating energy need.But during the restricting element to indoor unit is adjusted,
If adjusting is improper, the heating effect of indoor unit can be largely effected on.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.
For this purpose, the first purpose of this invention is to propose a kind of control method of interior 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
It is adjusted with aperture of the current exhaust degree of superheat to the interior machine restricting element of indoor unit, so that the interior machine of heating be effectively ensured not
With the heating effect under outdoor environment temperature.
Second object of the present invention is to propose a kind of computer readable storage medium.
Third object of the present invention is to propose a kind of control device of interior 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 interior machine restricting element in air conditioner
Method processed, the air conditioner include indoor unit and outdoor unit, and the indoor unit 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 unit instructs, obtain the compressor
Target exhaust pressure, and the compressor, which stablizes fortune, to be controlled such that the compressor according to the target exhaust pressure
Row, and obtain after the compressor stable operation current exhaust pressure of the compressor, current back pressure and current
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 unit is adjusted in temperature and the current exhaust degree of superheat.
The control method of interior machine restricting element in air conditioner according to an embodiment of the present invention, when the heating for receiving indoor unit
When operating instruction, the target exhaust pressure of compressor is obtained, and pressure is controlled such that 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
The aperture of the interior machine restricting element of the indoor unit is adjusted in degree, so that the interior machine of heating be effectively ensured in different outdoor environment temperature
Heating effect under degree.
According to one embodiment of present invention, it is obtained by the following formula 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.
According to one embodiment of present invention, it is obtained by the following formula the initial target discharge superheat of the compressor
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, described according to the initial target discharge superheat and the current exhaust mistake
The aperture of the interior machine restricting element of the indoor unit is adjusted in temperature, comprising: if the current exhaust degree of superheat is less than institute
Initial target discharge superheat is stated, then aperture is carried out to the interior machine restricting element and turns control down；If the current exhaust mistake
Temperature is greater than the initial target discharge superheat, then carries out aperture to the interior machine restricting element and tune up control.
According to one embodiment of present invention, during turning control down to the interior machine restricting element progress aperture,
Further include: the outlet temperature and current indoor environment temperature of the corresponding indoor unit of the interior machine restricting element are obtained, and described in calculating
Temperature gap between the outlet temperature of indoor unit and the current indoor environment temperature；If the temperature gap is less than first
Preset threshold or the hydrops signal for receiving the indoor unit, then be modified 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 greater than the second preset threshold or does not receive the hydrops letter of the indoor unit
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 preset threshold is greater than first preset threshold.
According to one embodiment of present invention, the initial target discharge superheat is subtracted into 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 storage medium, is used for
Application program is stored, the application program is used to execute the control method of interior machine restricting element in above-mentioned air conditioner.
Computer readable storage medium according to an embodiment of the present invention, when the heating operation for receiving indoor unit instructs,
The target exhaust pressure of compressor is obtained, and compressor, which stablizes fortune, to be controlled such that compressor according to target exhaust pressure
Row, and the current exhaust pressure of acquisition compressor, current back pressure and current exhaust overheat after compressor stable operation
Degree, meanwhile, current outdoor environment temperature is obtained, and be vented according to the initial target that current outdoor environment temperature obtains compressor
Temperature coefficient.Then, it 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 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, so that heating of machine at a temperature of different outdoor environments in heating be effectively ensured
Effect.
To achieve the above object, third aspect present invention embodiment proposes a kind of control of interior machine restricting element in air conditioner
Device processed, the air conditioner include indoor unit and outdoor unit, and the indoor unit includes interior machine restricting element, and the outdoor unit includes
Compressor, the control device include: the first acquisition module, for receive the indoor unit heating operation instruction when,
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 obtains module, obtains the compressor for obtaining current outdoor environment temperature, and according to current outdoor environment temperature
Initial target discharge superheat coefficient；Control module, the control module obtain module and described the with described first respectively
Two, which obtain module, is 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 compressor current exhaust pressure 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 unit is adjusted in the current exhaust degree of superheat.
The control device of interior machine restricting element in air conditioner according to an embodiment of the present invention, in the heating for receiving indoor unit
When operating instruction, by first obtain module obtain compressor target exhaust pressure, and according to target exhaust pressure to pressure
After contracting machine is controlled such that compressor stable operation, the current exhaust pressure of compressor, current back pressure and current are obtained
Discharge superheat.Module is obtained by second and obtains current outdoor environment temperature, and is obtained and pressed 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 unit is adjusted in temperature and the current exhaust degree of superheat, to be effectively ensured in heating
Heating effect of machine at a temperature of different outdoor environments.
According to one embodiment of present invention, the second acquisition module is obtained by the following formula the initial target row
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 is obtained by the following formula the initial mesh of the compressor
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 unit is adjusted in 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 turns down
Control；If the current exhaust degree of superheat is greater than the initial target discharge superheat, to described interior if the control module
Machine restricting element carries out aperture and tunes up control.
According to one embodiment of present invention, during turning control 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 unit of the interior machine restricting element, and counts
Calculate the temperature gap between the outlet temperature of the indoor unit and the current indoor environment temperature, wherein if the temperature
Difference receives the hydrops signal of the indoor unit less than the first preset threshold or the control module, 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；If it is default that the temperature gap is greater than second
Threshold value or the control module do not receive the hydrops signal of the indoor unit, and the control module then continues according to described first
The aperture of the interior machine restricting element is adjusted in the beginning target exhaust degree of superheat and the current exhaust degree of superheat, wherein institute
The second preset threshold is stated greater than first preset threshold.
According to one embodiment of present invention, the initial target discharge superheat is subtracted first in advance by the control module
If the degree of superheat is to obtain the revised initial target discharge superheat.
In addition, the embodiment of the present invention also proposed a kind of air conditioner comprising interior machine throttling member in above-mentioned air conditioner
The control device of part.
The air conditioner of the embodiment of the present invention can effectively ensure that machine is in different chamber in heating by above-mentioned control device
Heating effect at a temperature of external environment guarantees system stable operation.
Detailed description of the invention
Fig. 1 is the structural schematic diagram 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 unit hydrops；
Fig. 4 is the flow chart of the control method of interior machine restricting element in the air conditioner of a specific example according to the present invention；
And
Fig. 5 is the block diagram of the control device of interior machine restricting element in air conditioner according to an embodiment of the present invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
The control method of interior machine restricting element, computer in air conditioner to describe the embodiment of the present invention with reference to the accompanying drawings
The control device and air conditioner of interior 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 unit (can be one or more) and outdoor unit, interior
Machine may include interior machine restricting element, and outdoor unit may include compressor.
Specifically, by taking air conditioner has an indoor unit as an example.As shown in Figure 1, when air conditioner is run with heating mode
(when indoor unit is multiple, air conditioner is run with pure heating mode), the high-pressure gaseous refrigerant in outdoor unit high-voltage tube enters room
Interior machine after machine heat release indoors, returns to outdoor unit at low-pressure gaseous refrigerant by interior machine restricting element reducing pressure by regulating flow.Wherein, interior
The aperture of machine restricting element not only will affect the cold medium flux for the machine of entering the room, while also will affect the condensation temperature of indoor unit,
Therefore suitable aperture can make indoor unit both cold medium flux with higher while or condensation temperature with higher, to export
Higher heating capacity heats energy need to meet.
And in order to reach better heating effect, even for same heating indoor unit in identical indoor operating condition
Under, when outdoor environment temperature changes, the aperture of interior machine restricting element be also required to the variation according to outdoor environment temperature and
Variation, can obtain better heating effect in this way.Therefore, in an embodiment of the present invention, also by current outdoor environment temperature
Degree is adjusted the aperture of interior machine restricting element as one of parameter.
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 be can comprise the following steps that in the air conditioner
S1 obtains the target exhaust pressure of compressor, and according to target when the heating operation for receiving indoor unit instructs
Pressure at expulsion is controlled such that compressor stable operation to compressor, and compressor is obtained after compressor stable operation
Current exhaust pressure, current back pressure and the current exhaust degree of superheat.
Specifically, as shown in Figure 1, indoor unit hair heating energy need to be to room when indoor unit receives heating operation instruction
Outer machine, outdoor unit can need to obtain target exhaust pressure Pcs (or the corresponding saturation 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 the way that the temperature at exhaust outlet of compressor is arranged in
The current exhaust gas temperature Tp of sensor acquisition 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 is arranged according to the initial target that current outdoor environment temperature obtains compressor
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 unit
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 are current back pressure, and B is constant, and B can be obtained according to experiment test.
That is, being obtained according to current outdoor environment temperature corresponding when obtaining the target exhaust degree of superheat of compressor
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, with it is subsequent to interior machine restricting element aperture regulation during, the aperture of interior machine restricting element can be made full
Sufficient current outdoor environment temperature, so that indoor unit obtains better 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, comprising: if the current exhaust degree of superheat is less than initial target discharge superheat,
Aperture then is carried out to interior machine restricting element and turns control down；If the current exhaust degree of superheat is greater than initial target discharge superheat,
Aperture is carried out to interior machine restricting element and tunes up control.
Specifically, after obtaining initial target discharge superheat coefficient A 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 condition+
B；Alternatively, 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 condition
=A* (Tc-Te)+B.
Then, according to the initial target discharge superheat DSH and current exhaust mistake under current outdoor environment temperature T4 operating condition
The relationship of temperature DSH1 carries out PI adjusting to the aperture of interior machine restricting element.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 reduces heating capacity, 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 an embodiment of the present invention interior 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
The aperture of the interior machine restricting element of the indoor unit is adjusted, so as to when outdoor environment temperature changes, in real time
The aperture of interior machine restricting element is adjusted, to reach better heating effect.
Further, during turning control down to interior machine restricting element progress aperture, 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 unit, it may appear that condensing prematurely leads to interior
Machine hydrops, the liquid refrigerants in indoor unit in indoor heat exchanger is cooled quickly at this time, so that indoor unit and room air heat exchange
Effect is deteriorated, and heating leaving air temp is lower, or even causes heating leaving air temp and indoor environment temperature very close to seriously affecting easypro
Appropriateness.As shown in figure 3, when interior machine restricting element aperture is too small cause indoor unit hydrops when, heating leaving air temp is close to indoor ring
Border temperature, and the outlet temperature of indoor heat exchanger is closer to indoor environment temperature.Also, when indoor unit 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.
It therefore, can be according to the outlet temperature of indoor unit during turning control down to interior machine restricting element progress aperture
The aperture of interior machine restricting element is adjusted with indoor environment temperature, effectively prevent indoor unit hydrops phenomenon occur, simultaneously
Guarantee the heating effect of indoor unit.
According to one embodiment of present invention, it during turning control down to interior machine restricting element progress aperture, also wraps
It includes: obtaining the outlet temperature and current indoor environment temperature of the corresponding indoor unit of the interior machine restricting element, and calculate indoor unit
Temperature gap between outlet temperature and current indoor environment temperature；If temperature gap is less than the first preset threshold or reception
To the hydrops signal of indoor unit, then initial target discharge superheat is modified, and is vented according to revised initial target
The aperture of interior machine restricting element is adjusted in the degree of superheat and the current exhaust degree of superheat of compressor；If temperature gap is greater than the
Two preset thresholds or the hydrops signal for not receiving indoor unit then continue according to initial target discharge superheat and current exhaust
The aperture of interior machine restricting element is adjusted in the degree of superheat.Wherein, the second preset threshold is greater than the first preset threshold, and first is default
Threshold value and the second preset threshold can be demarcated according to the actual situation.
In an embodiment of the present invention, after initial target discharge superheat being subtracted the first default degree of superheat to obtain amendment
Initial target discharge superheat, wherein revised initial target discharge superheat not less than compressor be safely operated when
The target exhaust degree of superheat, the first default degree of superheat can be demarcated according to the actual situation.
Specifically, also obtaining the interior machine restricting element in real time during the aperture to interior machine restricting element is turned down
The outlet temperature T2 and current indoor environment temperature T1 of corresponding indoor unit, and the difference of calculating between the two, i.e. T2-T1, so
The difference is judged afterwards.
If T2-T1 > the second preset threshold G or outdoor unit do not receive the hydrops signal of indoor unit, continue root
It carries out turning control down according to aperture of the initial target discharge superheat DSH and current exhaust degree of superheat DSH1 to interior machine restricting element,
Until the actual exhaust air degree of superheat DSH1 ' of compressor is equal to initial target discharge superheat DSH, stop to interior machine restricting element
Aperture regulation, at this point, the aperture of interior machine restricting element is optimal aperture, system stable operation.
If T2-T1 < the first preset threshold E or outdoor unit receive the corresponding indoor unit of the interior machine restricting element
Initial target discharge superheat DSH is then modified to smaller target value by hydrops signal, e.g., revised initial target exhaust
Degree of superheat DSH '=initial target discharge superheat DSH- first presets degree of superheat F.Then, it is arranged according to revised initial target
The aperture of interior machine restricting element is adjusted in gas degree of superheat DSH ' and current exhaust degree of superheat DSH1.Machine restricting element in this way
Aperture can gradually tune up so that refrigerant circulation is more preferable, so as to exclude the hydrops of indoor unit.
Further, according to revised initial target discharge superheat DSH ' to the aperture of interior machine restricting element gradually
During tuning up, if the second preset threshold of T2-T1 > G (G > E) or outdoor unit do not receive the hydrops letter of indoor unit
Number, then stop tuning up the aperture of interior machine restricting element, at this time the 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, the aperture of the state of indoor unit and interior machine restricting element is carried out again
Detection, if occurring indoor unit hydrops or T2-T1 < E again, reduces revised initial target discharge superheat again,
Until the aperture of interior machine restricting element is stablized in some optimal aperture, it neither will lead to indoor unit hydrops in this way, will not make
The delivery temperature of compressor is too low and influences heating effect.
Therefore, in air conditioner according to an embodiment of the present invention interior machine restricting element control method, to interior machine throttle member
During the aperture of part is turned down, judged by outlet temperature to indoor unit and indoor environment temperature, and carried out corresponding
Adjusting, thus guarantee indoor unit heating effect while, indoor unit hydrops can also be effectively prevent.
To make those skilled in the art better understand the present invention, Fig. 4 is the sky of a specific example according to the present invention
Adjust the flow chart of the control method of interior machine restricting element in device.As shown in figure 4, in the air conditioner interior machine restricting element controlling party
Method can comprise the following steps that
S101, indoor unit heating operation.
S102 obtains target exhaust pressure Pcs (or the corresponding saturation temperature of target exhaust pressure of compressor of compressor
Tcs), and according to Pcs compressor stable operation is controlled.
S103 obtains current exhaust pressure Pc, the current back pressure Pe of compressor and works as after compressor stable operation
Front exhaust degree of superheat DSH1.
S104 obtains current outdoor environment temperature T4.
S105 calculates initial target discharge superheat the coefficient A, i.e. A=C*T4+D of compressor according to T4.
S106, calculate initial target discharge superheat DSH=A* (the Pc-Pe)+B or DSH=A* (Tc-Te) of compressor+
B。
S107 carries out PI adjusting to interior machine restricting element according to the relationship of DSH and DSH1.
S108, judges whether DSH1 is greater than DSH.If so, executing step S117；If not, executing step S109.
S109 gradually turns the aperture of interior machine restricting element down.
S110 obtains the outlet temperature T2 and current indoor environment temperature T1 of the corresponding indoor unit of the interior machine restricting element.
Whether S111 judges T2-T1 less than the first preset threshold E or outdoor unit receives the hydrops signal of indoor unit.
If so, executing step 112；If not, executing step S115.
S112, revised initial target discharge superheat DSH '=DSH- first preset degree of superheat F.
S113 judges the hydrops letter that whether T2-T1 is greater than the second preset threshold G or outdoor unit does not receive indoor unit
Number.If so, executing step S114；If not, return step S112.
S114 is delayed after a period of time as actual exhaust air degree of superheat DSH1 '=DSH ' of compressor, judges room again
The aperture of the state of interior machine and interior machine restricting element, until interior machine restricting element is stablized in optimal aperture.
S115 judges the hydrops letter that whether T2-T1 is greater than the second preset threshold G or outdoor unit does not receive indoor unit
Number.If so, executing step S116；If not, return step S110.
S116 obtains the optimal aperture of interior machine restricting element as DSH1 '=DSH.
S117 gradually tunes up the aperture of interior machine restricting element.
S118 obtains the optimal aperture of interior machine restricting element as DSH1 '=DSH.
In conclusion in air conditioner according to an embodiment of the present invention interior machine restricting element control method, when receiving room
When the heating operation instruction of interior machine, the target exhaust pressure of compressor is obtained, and carry out to compressor according to target exhaust pressure
It controls so that compressor stable operation, and obtains after compressor stable operation the current exhaust pressure of compressor, current returns
Atmospheric pressure and the current exhaust degree of superheat, meanwhile, current outdoor environment temperature is obtained, and obtain and press 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 unit is adjusted in the front exhaust degree of superheat, so that the interior machine of heating be effectively ensured in difference
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 an embodiment of the present invention.In
In the embodiment of the present invention, as shown in Fig. 2, air conditioner may include indoor unit 10 and outdoor unit 20, indoor unit 10 may include interior machine
Restricting element 11, outdoor unit 20 may include compressor 21.
As shown in figure 5, in the air conditioner interior machine restricting element control device can include: first obtain module 100, second
Obtain module 200 and control module 300.
Wherein, the first acquisition module 100 is used to obtain compressor 21 in the heating operation instruction for receiving indoor unit
Target exhaust pressure, and after being controlled such that 21 stable operation of compressor to compressor 21 according to target exhaust pressure, it obtains
Take the current exhaust pressure, current back pressure and the current exhaust degree of superheat of compressor 21.Second acquisition module 200 is for obtaining
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 21 stable operation of compressor 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 unit 10 is adjusted in 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 exhaust by above-mentioned formula (1)
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 unit 10 is adjusted in the degree of superheat, wherein if the current exhaust degree of superheat is small
In initial target discharge superheat, control module 300 then carries out aperture to interior machine restricting element 11 and turns control down；If when front row
The gas degree of superheat is greater than initial target discharge superheat, and control module 300 then carries out aperture to interior machine restricting element 11 and tunes up control.
According to one embodiment of present invention, during turning control down to interior machine restricting element 11 progress aperture, control
Molding block 300 also obtains the outlet temperature and current indoor environment temperature of the corresponding indoor unit 10 of interior machine restricting element 11, and
Calculate the temperature gap between the outlet temperature and current indoor environment temperature of indoor unit 10, wherein if temperature gap is less than
First preset threshold or control module 300 receive the hydrops signal of indoor unit 10, and control module 300 then arranges 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 greater than the second preset threshold or control module 300 does not connect
The hydrops signal of indoor unit 10 is received, control module 300 then continues to overheat according to initial target discharge superheat and current exhaust
The aperture of interior machine restricting element 11 is adjusted in degree, wherein the second preset threshold is greater than the first preset threshold.
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 undisclosed thin in the control device of interior machine restricting element in the air conditioner of the embodiment of the present invention
Section, please refers to details disclosed in the control method of interior machine restricting element in the air conditioner of the embodiment of the present invention, specifically here
It repeats no more.
The control device of interior machine restricting element in air conditioner according to an embodiment of the present invention, in the heating for receiving indoor unit
When operating instruction, by first obtain module obtain compressor target exhaust pressure, and according to target exhaust pressure to pressure
After contracting machine is controlled such that compressor stable operation, the current exhaust pressure of compressor, current back pressure and current are obtained
Discharge superheat.Module is obtained by second and obtains current outdoor environment temperature, and is obtained and pressed 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 unit is adjusted in temperature and the current exhaust degree of superheat, to be effectively ensured in heating
Heating effect of machine at a temperature of different outdoor environments.
In addition, the embodiment of the present invention also proposed a kind of computer readable storage medium, for storing application program, answer
It is used to execute the control method of interior machine restricting element in above-mentioned air conditioner with program.
The computer readable storage medium of the embodiment of the present invention is obtained when the heating operation for receiving indoor unit instructs
The target exhaust pressure of compressor, and compressor stable operation is controlled such that 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 the initial target discharge superheat of compressor is obtained according to current outdoor environment temperature
Coefficient.Then, it is obtained and is 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 unit
The aperture of interior machine restricting element is adjusted, so that the heating effect for heating interior machine at a temperature of different outdoor environments be effectively ensured
Fruit.
In addition, the embodiment of the present invention also proposed a kind of air conditioner comprising interior machine throttling member in above-mentioned air conditioner
The control device of part.
The air conditioner of the embodiment of the present invention can effectively ensure that machine is in different chamber in heating by above-mentioned control device
Heating effect at a temperature of external environment guarantees system stable operation.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements, unless otherwise restricted clearly.For those of ordinary skill in the art
For, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
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 be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal 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 specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (12)
1. the control method of interior machine restricting element in a kind of air conditioner, which is characterized in that the air conditioner includes indoor unit and room
Outer machine, the indoor unit include interior machine restricting element, and the outdoor unit includes compressor, be the described method comprises the following steps:
When the heating operation for receiving the indoor unit instructs, the target exhaust pressure of the compressor is obtained, and according to institute
It states target exhaust pressure and the compressor stable operation is controlled such that the compressor, and stablize 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 is arranged according to the initial target that the current outdoor environment temperature obtains the compressor
Gas degree of superheat coefficient；And
It is 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
The aperture of the interior machine restricting element of the indoor unit is adjusted in degree, wherein if the current exhaust degree of superheat is less than described
Initial target discharge superheat then carries out aperture to the interior machine restricting element and turns control down；
During turning control down to the interior machine restricting element progress aperture, further includes:
The outlet temperature and current indoor environment temperature of the corresponding indoor unit 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 preset threshold or receives the hydrops signal of the indoor unit, to it is described just
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 in the gas degree of superheat；
If the temperature gap is greater than the second preset threshold or does not receive the hydrops signal of the indoor unit, 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 preset threshold is greater than first preset threshold.
2. the control method of interior machine restricting element in air conditioner as described in claim 1, which is characterized in that pass through following formula
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 interior machine restricting element in air conditioner as claimed in claim 1 or 2, which is characterized 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 is described works as
Front-seat atmospheric pressure, Pe are the current back pressure, and B is constant.
4. the control method of interior machine restricting element in air conditioner as described in claim 1, which is characterized in that described according to
The aperture of the interior machine restricting element of the indoor unit is adjusted in initial target discharge superheat and the current exhaust degree of superheat,
Include:
If the current exhaust degree of superheat is greater than the initial target discharge superheat, the interior machine restricting element is carried out
Aperture tunes up control.
5. the control method of interior machine restricting element in air conditioner as described in claim 1, which is characterized in that by the initial mesh
Mark discharge superheat subtracts the first default degree of superheat to obtain the revised initial target discharge superheat.
6. a kind of computer readable storage medium, which is characterized in that for storing application program, the application program is for executing
The control method of interior machine restricting element in air conditioner of any of claims 1-5.
7. the control device of interior machine restricting element in a kind of air conditioner, which is characterized in that the air conditioner includes indoor unit and room
Outer machine, the indoor unit include interior machine restricting element, and the outdoor unit includes compressor, and the control device includes:
First obtains module, for obtaining the target of the compressor in the heating operation instruction for receiving the indoor unit
Pressure at expulsion, and the compressor stable operation is being controlled such that the compressor according to the target exhaust pressure
Afterwards, the current exhaust pressure, current back pressure and the current exhaust degree of superheat of the compressor are obtained；
Second obtains module, for obtaining current outdoor environment temperature, and according to current outdoor environment temperature acquisition
The initial target discharge superheat coefficient of compressor；
Control module, the control module are connected with the first acquisition module and the second acquisition module respectively, the control
Molding block is used to be controlled such that the compressor stable operation, and root to the compressor 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
The aperture of the interior machine restricting element of the indoor unit is adjusted, wherein if the current exhaust degree of superheat is first less than described
The beginning target exhaust degree of superheat, the control module then carry out aperture to the interior machine restricting element and turn control down；
The control module is also used to, and during turning control down to the interior machine restricting element progress aperture, it is interior to obtain this
The outlet temperature and current indoor environment temperature of the corresponding indoor unit of machine restricting element, and calculate the outlet temperature of the indoor unit
With the temperature gap between the current indoor environment temperature, wherein
If the temperature gap is believed less than the hydrops that the first preset threshold or the control module receive the indoor unit
Number, the control module is then modified the initial target discharge superheat, and is vented according to revised initial target
The aperture of the interior machine restricting element is adjusted in the degree of superheat and the current exhaust degree of superheat of the compressor；
If the temperature gap is greater than the second preset threshold or the control module does not receive the hydrops of the indoor unit
Signal, the control module then continue 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 preset threshold is greater than first preset threshold.
8. the control device of interior machine restricting element in air conditioner as claimed in claim 7, which is characterized in that described second obtains
Module is obtained by the following formula 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.
9. the control device of interior machine restricting element in air conditioner as claimed in claim 7 or 8, which is characterized in that the control
Module is obtained by the following formula 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 is described works as
Front-seat atmospheric pressure, Pe are the current back pressure, and B is constant.
10. the control device of interior machine restricting element in air conditioner as claimed in claim 7, which is characterized 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 unit
When aperture is adjusted, wherein
If the current exhaust degree of superheat is greater than the initial target discharge superheat, to the interior machine if control module
Restricting element carries out aperture and tunes up control.
11. the control device of interior machine restricting element in air conditioner as claimed in claim 7, which is characterized 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.
12. a kind of air conditioner, which is characterized in that throttle including machine interior in described in any item air conditioners as claim in claims 7-11
The control device of element.
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| CN108758975B (en) * | 2018-06-12 | 2020-11-13 | 广东美的暖通设备有限公司 | Control method and system of air conditioner system and air conditioner |
| CN108759007A (en) * | 2018-06-12 | 2018-11-06 | 广东美的暖通设备有限公司 | Control method, system and the air-conditioning of air-conditioning system |
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| CN110848903B (en) * | 2019-11-20 | 2021-05-18 | 宁波奥克斯电气股份有限公司 | Air conditioner exhaust fluctuation control method and device, air conditioner and storage medium |
| CN113375319A (en) * | 2020-02-25 | 2021-09-10 | 青岛海尔空调电子有限公司 | Control method of fixed-frequency air conditioner in refrigeration state |
| CN111595000B (en) * | 2020-05-18 | 2022-03-29 | 广东美的暖通设备有限公司 | Air conditioning system, control method and device of hydraulic module of air conditioning system and storage medium |
| CN111578472B (en) * | 2020-05-29 | 2022-03-22 | 广东美的制冷设备有限公司 | Control method and device of air conditioner outdoor unit, air conditioner outdoor unit and air conditioner |
| CN111895604B (en) * | 2020-07-24 | 2021-10-22 | 海信（山东）空调有限公司 | Air conditioner |
| CN113028575B (en) * | 2021-04-22 | 2022-04-19 | 宁波奥克斯电气股份有限公司 | Target exhaust gas temperature correction method, target exhaust gas temperature correction device, electronic apparatus, and storage medium |
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