CN117847847A - Air conditioner refrigerating system, air conditioner and electronic equipment - Google Patents
Air conditioner refrigerating system, air conditioner and electronic equipment Download PDFInfo
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- 239000003921 oil Substances 0.000 claims abstract description 152
- 239000003507 refrigerant Substances 0.000 claims abstract description 58
- 239000010687 lubricating oil Substances 0.000 claims abstract description 36
- 238000004364 calculation method Methods 0.000 claims description 27
- 238000005057 refrigeration Methods 0.000 claims description 14
- 239000010725 compressor oil Substances 0.000 claims description 13
- 238000001704 evaporation Methods 0.000 claims description 10
- 238000004590 computer program Methods 0.000 claims description 8
- 238000009833 condensation Methods 0.000 claims description 8
- 230000005494 condensation Effects 0.000 claims description 8
- 230000008020 evaporation Effects 0.000 claims description 8
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 239000000314 lubricant Substances 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 4
- 230000007547 defect Effects 0.000 abstract description 5
- 239000002699 waste material Substances 0.000 abstract description 5
- 230000001050 lubricating effect Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 25
- 230000008569 process Effects 0.000 description 10
- 230000001276 controlling effect Effects 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012886 linear function Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012821 model calculation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The invention discloses an air conditioner refrigerating system, which comprises a compressor and an oil separator, and further comprises an oil return channel, wherein an oil inlet of the oil return channel is connected to an oil outlet of the oil separator, and an oil outlet of the oil return channel is connected to an air suction port of the compressor, wherein an electronic expansion valve is arranged on the oil return channel and is used for adjusting the oil return amount from the oil separator to the compressor; the oil return control device is used for adjusting the oil return amount from the oil separator to the compressor by controlling the opening of the electronic expansion valve; compared with the prior art, the oil return electronic expansion valve is suitable for the oil return requirements of the compressor on lubricating oil under different working conditions, and the waste of refrigerant and the defect of lubricating capacity are avoided.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner refrigerating system, an air conditioner and electronic equipment.
Background
The compressor is a power core of a refrigerating system of an air conditioner, plays a role of compressing and driving the refrigerant in a circulating loop of the air conditioner refrigerant, and compresses the sucked low-temperature and low-pressure refrigerant to improve the temperature and pressure of the refrigerant, so that the refrigerant can move, and the aim of refrigerating or heating is achieved through heat-power conversion.
Air conditioning systems are widely used in social life, in particular multi-split air conditioning systems. Because the compressor runs at a high speed, lubricating oil is needed to lubricate parts such as a compression mechanism and a bearing, and abrasion and damage are avoided. Lubricating oil in the compressor enters the system along with refrigerant exhaust, and oil separation is needed to be carried out on refrigerant exhaust in places with large pressure difference, low evaporation pressure, long piping, large refrigerant filling quantity and the like, so that the situation that a large amount of lubricating oil enters the refrigerating system and cannot timely return to the compressor to cause damage to the compressor is avoided. The lubricating oil separated in the oil separator passes through the throttling device and returns to the air suction port of the compressor.
In the prior art, a capillary tube is used as a throttling device, but the length of the capillary tube is fixed and is influenced by high-low pressure differential, and when the pressure differential is too large, refrigerant gas and lubricating oil flow into a compressor together, so that the refrigerant is wasted; when the pressure difference is too small, the lubricating oil cannot flow back to the compressor in time due to insufficient power.
It can be seen that the oil return amount to the compressor in the prior art is difficult to control.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an air conditioner refrigerating system, an air conditioner, electronic equipment and a computer readable storage medium thereof, so as to solve the problem that the oil return amount of a compressor is difficult to control in the prior art.
In order to achieve the above object, the first aspect of the present invention adopts the following technical scheme: the refrigerating system of the air conditioner comprises a compressor and an oil separator, and further comprises an oil return channel, wherein an oil inlet of the oil return channel is connected to an oil outlet of the oil separator, and an oil outlet of the oil return channel is connected to an air suction port of the compressor, wherein an electronic expansion valve is arranged on the oil return channel and is used for adjusting oil return amount from the oil separator to the compressor; the oil return control device is used for adjusting the oil return amount from the oil separator to the compressor by controlling the opening of the electronic expansion valve; the oil return control device is configured to: acquiring suction pressure and discharge pressure of a compressor; calculating the oil discharge amount of the compressor; determining a compressor gas pressure differential based on the obtained suction pressure and discharge pressure of the compressor; determining the opening of the electronic expansion valve based on the determined gas pressure difference of the compressor, the oil discharge amount of the compressor, the preset lubricating oil density and the preset opening relation of the electronic expansion valve; and adjusting the opening of the electronic expansion valve according to the determined opening of the electronic expansion valve.
In a preferred manner, the step of calculating the compressor oil discharge amount includes: acquiring the oil discharge rate of lubricating oil of the frequency of the compressor; calculating the mass flow of the compressor; and calculating the oil discharge amount of the compressor according to the oil discharge rate of the lubricating oil of the frequency of the compressor, the mass flow of the compressor and the preset oil discharge amount calculation relation. The compressor oil discharge amount is obtained by the relation among the oil discharge rate of the compressor frequency, the mass flow of the compressor and the preset oil discharge amount, so that the compressor oil discharge amount is determined according to the performance parameter of the oil discharge rate of the compressor and the mass flow of the compressor in the operation process, and the opening degree adjustment of the electronic expansion valve can be more attached to the requirement of the compressor on the oil return amount in the actual operation process.
In a preferred form, the step of calculating the compressor mass flow comprises: calculating a refrigerant suction density and a compressor volumetric flow; the compressor mass flow is calculated based on the calculated refrigerant suction density, the compressor volume flow and a preset mass flow calculation relationship. The mass flow of the compressor is further determined through the suction density of the refrigerant and the volume flow of the compressor, so that the opening degree adjustment of the electronic expansion valve is more suitable for the requirement of the compressor on the oil return amount in the actual operation process.
In a preferred manner, the step of calculating the suction density of the refrigerant includes: acquiring the suction temperature of the compressor; the refrigerant suction density is calculated based on the obtained suction temperature of the compressor, suction pressure of the compressor, a preset refrigerant type, and a preset refrigerant state equation. According to the suction temperature of the compressor, the suction pressure of the compressor and a preset refrigerant type and a refrigerant state equation in the actual operation process of the compressor, the suction density of the refrigerant is quickly and effectively obtained, so that the opening degree adjustment of the electronic expansion valve is connected with the suction temperature of the compressor, the suction pressure of the compressor and the refrigerant type, and the opening degree of the electronic expansion valve is controlled more accurately.
In a preferred form, the step of calculating the compressor volumetric flow comprises: acquiring the real-time rotating speed of a compressor; and calculating the volume flow of the compressor based on the acquired real-time rotating speed of the compressor, the preset compressor displacement and the preset volume flow calculation relation. The preset compressor displacement is a performance parameter of the compressor, and the compressor volume flow is obtained by combining the real-time rotation speed of the compressor, so that the opening degree adjustment of the electronic expansion valve is related to the compressor and the running state thereof again, and the opening degree of the electronic expansion valve is controlled more accurately.
In a preferred form, the step of calculating the compressor mass flow comprises: acquiring the rotation speed of a compressor, the evaporation temperature of an evaporator and the condensation temperature of a condenser; obtaining a flow ten coefficient based on the obtained rotation speed of the compressor and a preset flow ten coefficient obtaining rule; and calculating the mass flow of the compressor according to the obtained evaporation temperature of the evaporator, the condensation temperature of the condenser and the ten coefficients of flow and a preset multi-element calculation rule. The method is another calculation mode of the compressor mass flow, and the compressor mass flow is determined through the rotation speed of the compressor, the evaporation temperature of the evaporator and the condensation temperature of the condenser, so that the compressor mass flow is related to the temperature parameter of the refrigerant in the operation process of the air conditioner refrigerating system, the compressor mass flow is quickly and relatively accurately determined according to the operation state of the air conditioner refrigerating system, and the opening degree of the electronic expansion valve is more accurately controlled.
In a preferred manner, the step of determining the opening degree of the electronic expansion valve based on the determined compressor gas pressure difference, the compressor discharge amount, the preset lubricating oil density, and the preset electronic expansion valve opening degree relationship includes: determining an actual flow coefficient based on the determined compressor gas pressure difference, the compressor oil discharge amount, the preset lubricating oil density and the preset electronic expansion valve opening relation; and determining the opening degree of the electronic expansion valve based on the determined actual flow coefficient and a preset opening degree calculation rule. The actual flow coefficient is determined by combining the gas pressure difference of the compressor, the oil discharge amount of the compressor and the density of lubricating oil with the preset opening relation of the electronic expansion valve, and then the opening of the electronic expansion valve is determined according to the actual flow coefficient, so that the opening of the electronic expansion valve is accurately controlled, the oil return amount of the compressor is accurately regulated, and the waste of refrigerant and the defect of lubricating capacity are avoided.
In a preferable mode, the preset electronic expansion valve opening relation is:
wherein C is vneed For the actual flow coefficient, m oil For compressor oil discharge amount ρ oil Is the oil density, Δp is the differential pressure.
The second aspect of the invention adopts the following technical scheme: an air conditioner comprising an air conditioner refrigeration system according to the first aspect of the present invention.
The third aspect of the invention adopts the following technical scheme: an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of configuring an oil return control device in an air conditioner refrigeration system according to the first aspect of the invention when the program is executed.
The fourth aspect of the present invention adopts the following technical scheme: a computer-readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements the steps of configuring an oil return control device in a refrigeration system of an air conditioner according to the first aspect of the present invention.
Compared with the prior art, the invention has the following beneficial effects:
according to the air conditioner refrigerating system, the electronic expansion valve is arranged in the oil return channel of the compressor, the opening of the electronic expansion valve is controlled through the oil return control device, and the oil return control device is used for adjusting the opening of the electronic expansion valve specifically by combining the preset opening relation of the electronic expansion valve with the suction pressure, the exhaust pressure, the oil discharge amount of the compressor and the lubricating oil density, so that the oil return electronic expansion valve is adapted to the oil return requirements of the compressor on the lubricating oil under different working conditions, and the waste of a refrigerant and the defect of lubricating capacity are avoided.
Drawings
FIG. 1 is a process flow diagram of an air conditioner refrigeration system according to an embodiment of the present invention;
fig. 2 is a control flow chart of an oil return control device controlling an electronic expansion valve in a refrigeration system of an air conditioner according to an embodiment of the invention.
Reference numerals in the drawings of the specification include: a compressor 1, a gas-liquid separator 2, a second pressure sensor 3, an electronic expansion valve 4, an oil separator 5, a four-way valve 6, an evaporator 7, a throttle mechanism 8, a condenser 9, a first pressure sensor 10, and an intake air temperature sensor 11.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail by means of specific examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Because the compressor runs at a high speed, lubricating oil is needed to lubricate parts such as a compression mechanism and a bearing, and abrasion and damage are avoided. Lubricant in compressor enters system along with refrigerant exhaustFor places with large pressure difference, low evaporation pressure, long piping, large refrigerant filling amount and the like, an oil separator is needed to separate oil in refrigerant exhaust, so that a large amount of lubricating oil is prevented from entering a refrigeration system and not returning to the compressor in time, and the compressor is prevented from being damaged. The lubricating oil separated in the oil separator passes through the throttling device and returns to the air suction port of the compressor. In the prior art, a capillary tube is used as a throttling device, but the length of the capillary tube is fixed and is influenced by high-low pressure differential, and when the pressure differential is too large, refrigerant gas and lubricating oil flow into a compressor together, so that the refrigerant is wasted; when the pressure difference is too small, the lubricating oil cannot flow back to the compressor in time due to insufficient power. To solve this problem, an embodiment according to a first aspect of the present invention provides an air conditioner refrigeration system, as shown in fig. 1, including a compressor 1 and an oil separator 5; the oil return device further comprises an oil return channel, wherein an oil inlet of the oil return channel is connected to an oil outlet of the oil separator 5, and an oil outlet of the oil return channel is connected to an air suction port of the compressor 1, an electronic expansion valve 4 is arranged on the oil return channel, and the electronic expansion valve 4 is used for adjusting the oil return amount from the oil separator 5 to the compressor 1; the oil return control device is used for adjusting the oil return amount from the oil separator 5 to the compressor 1 by controlling the opening degree of the electronic expansion valve 4; as shown in fig. 2, the oil return control device is configured to: s1, acquiring suction pressure P of a compressor S Exhaust pressure P d The method comprises the steps of carrying out a first treatment on the surface of the S2, calculating the oil discharge amount m of the compressor oil The method comprises the steps of carrying out a first treatment on the surface of the S3, based on the acquired suction pressure P of the compressor S And exhaust pressure P d To determine a compressor gas pressure differential Δp; s4, based on the determined compressor gas pressure difference delta p and the compressor oil discharge amount m oil Preset lubricant density ρ oil Determining the opening degree of an electronic expansion valve according to a preset electronic expansion valve opening degree relation; and S5, adjusting the opening degree of the electronic expansion valve according to the determined opening degree of the electronic expansion valve.
According to the refrigerating system of the air conditioner, the electronic expansion valve is arranged in the oil return channel of the compressor, the opening degree of the electronic expansion valve is controlled through the oil return control device, and the oil return control device controls the electronic expansion valveThe opening degree of (2) is specifically adjusted to the suction pressure P S Exhaust pressure P d Oil discharge m of compressor oil Density ρ of lubricating oil oil The method is carried out by combining the preset opening relation of the electronic expansion valve, so that the oil return electronic expansion valve is adapted to the oil return requirements of the compressor on lubricating oil under different working conditions, and the waste of refrigerant and the defect of lubricating capacity are avoided.
In this embodiment: the oil return control device comprises a first pressure sensor 10 and a second pressure sensor 3, wherein the first pressure sensor 10 is arranged at the suction end of the compressor 1 for controlling the suction pressure P of the compressor S Collecting, the second pressure sensor 3 is arranged at the exhaust end of the compressor 1 to measure the exhaust pressure P of the compressor d Collecting; wherein the compressor gas pressure difference Δp is in particular the discharge pressure P of the compressor d Subtracting suction pressure P of compressor S Is obtained by the method. Density ρ of lubricating oil oil Is set to 930kg/m in the present embodiment 3 。
The air conditioner refrigerating system is further refined firstly, the air conditioner refrigerating system further comprises a cooling unit for cooling the refrigerant separated by the oil separator and then enabling the cooled refrigerant to enter the compressor again for operation, and the cooling unit is in the prior art and mainly comprises an evaporator 7, a condenser 9, a throttling mechanism 8, a gas-liquid separator 2, a four-way valve 6 and is matched with the structures of the compressor 1, the oil separator 5 and the like to form the air conditioner refrigerating system.
The process in which the oil return control device is configured to control the opening degree of the electronic expansion valve will be further described below.
Wherein, for step S2.
The step of calculating the oil discharge amount of the compressor comprises the following steps: acquiring the oil discharge rate c of the lubricating oil of the compressor frequency; calculating the mass flow m of the compressor; and calculating the oil discharge amount of the compressor according to the oil discharge rate c of the lubricating oil of the compressor frequency, the mass flow m of the compressor and a preset oil discharge amount calculation relation.
The oil discharge amount calculation relation preset in the above is: m is m oil =m×c; when the oil discharge rate c of the lubricating oil of the compressor frequency and the mass flow of the compressor are obtainedAfter the quantity m, the quantity m is brought into the formula to obtain the compressor discharge quantity m oil 。
In this embodiment: the oil discharge rate c of the lubricating oil of the compressor frequency is a performance parameter of the compressor and is related to the model of the compressor and the rotating speed of the compressor in the running process; specifically, reference may be made to table 1 below.
Table 1 lubricating oil discharge rate table for compressor frequency
The data in table 1 is only used as a reference, and is set in the system as a preset conversion relation; for example, when the model of the compressor is 65PHDG-DJ and the rotation speed of the compressor at this time is 30rps, the oil discharge rate of the lubricant at the frequency of the compressor at this time is 0.40% is obtained. When the model of the compressor is 65PHDG-DJ and the rotation speed of the compressor is 45rps, the system can form two point values to construct a linear function through the oil discharge rate of the lubricating oil when the rotation speed is 30rps and 60rps, and then the oil discharge rate of the lubricating oil when the rotation speed of the compressor is 45rps can be calculated; in order to improve the conversion accuracy, the system can also form a four-point value construction curve function through the oil discharge rates of the lubricating oil with the rotation speeds of 30rps, 60rps, 90rps and 110rps, and can also calculate the oil discharge rate of the compressor with the rotation speed of 45 rps. It is preferable to construct a curve function to calculate the oil discharge rate at 45rps, and the accuracy of the oil discharge rate obtained at this time is higher.
The above calculation of the compressor mass flow m is two ways in the present invention, and two ways of calculating the compressor mass flow m are described below.
First way of calculating the compressor mass flow m:
the step of calculating the mass flow of the compressor comprises the following steps: meter with a meter bodyCalculating the suction density ρ of the refrigerant s Compressor volumetric flow V; based on the calculated refrigerant suction density ρ s The compressor volume flow V and the preset mass flow calculation relation are used for calculating the compressor mass flow m.
The preset mass flow calculation relationship is as follows: m=ρ s X V. When the refrigerant suction density ρ of the compressor is obtained s And the compressor volume flow V is brought into the formula to obtain the compressor mass flow m.
Based on the scheme:
the step of calculating the refrigerant suction density includes: obtaining suction temperature T of compressor S The method comprises the steps of carrying out a first treatment on the surface of the Intake temperature T based on the obtained compressor S Suction pressure P of compressor S The preset refrigerant type and the preset refrigerant state equation are used for calculating and obtaining the refrigerant suction density rho s 。
The preset refrigerant state equation is as follows:the oil return control device also comprises a first temperature sensor which is arranged at the air suction end of the compressor to collect the air suction temperature T of the compressor S The method comprises the steps of carrying out a first treatment on the surface of the The refrigerant type is preset in the oil return control device, and after the refrigerant type is collected, the molecular weight M and the gas constant R contained in the refrigerant type are obtained; simultaneously combining the acquired suction temperature T S And suction pressure P of the compressor S The refrigerant suction density ρ can be calculated s The method comprises the steps of carrying out a first treatment on the surface of the In this embodiment, the refrigerant is R410A, the molecular weight M of the refrigerant is 79.2, and R is 8.314J/(mol×k).
The step of calculating the compressor volumetric flow rate comprises: acquiring the real-time rotating speed r of the compressor; based on obtained real-time rotating speed r of compressor and preset compressor displacement V rev And calculating the compressor volume flow V according to a preset volume flow calculation relation.
Wherein, the preset volume flow calculation relation is as follows: v=v rev X r. Compressor rowQuantity V rev Is a performance parameter value of the compressor, is preset in the system, and can be directly obtained when in use, and the displacement V of the compressor is obtained rev Typically set to one of 5-200cm 3/revolution. The real-time rotation speed r of the compressor can be detected by a centrifugal tachometer, and the obtained real-time rotation speed r of the compressor and the obtained displacement V of the compressor are obtained rev And carrying out the calculation relation.
The second way of calculating the compressor mass flow rate is:
the step of calculating the mass flow of the compressor comprises the following steps: obtaining the rotation speed r of the compressor and the evaporation temperature T of the evaporator e Condensation temperature T of condenser c The method comprises the steps of carrying out a first treatment on the surface of the Obtaining a flow rate ten coefficient based on the obtained compressor rotation speed r and a preset flow rate ten coefficient obtaining rule (the flow rate ten coefficient is A in Table 2 0 To A 9 ) The method comprises the steps of carrying out a first treatment on the surface of the According to the obtained evaporating temperature T of the evaporator e Condensation temperature T of condenser c And calculating the mass flow m of the compressor by using the flow ten coefficients and a preset multi-element calculation rule.
Wherein the oil return control device can also comprise a second temperature sensor and a third temperature sensor, the second temperature sensor is arranged on the evaporator to control the evaporating temperature T of the evaporator e Collecting, wherein a third temperature sensor is arranged on the condenser to measure the condensation temperature T of the condenser c And (5) collecting.
The preset flow ten-coefficient acquisition rule is provided by a compressor manufacturer, and the implementation is stored in a system for use; such as the data in table 2.
Table 2 flow ten coefficients for compressors
Wherein, the preset multi-element calculation rule is as follows: m=a 0 +A 1 ×T e +A 2 ×T c +A 3 ×T e 2 +A 4 ×T e ×T c +A 5 ×T c 2 +A 6 ×T e 3 +A 7 ×T c ×T e 2 +A 8 ×T e ×T c 2 +A 9 ×T c 3 . The preset multi-element calculation rule is an existing calculation relation.
During operation: when the rotation speed of the compressor is 60RPS, A 0 ＝267.3929993kg/h，
A 1 ＝8.560574608，A 2 ＝4.363613894，A 3 ＝0.188827528，A 4 ＝0.090504496，A 5 ＝-0.11106398，
A 6 ＝0.003146973，A 7 ＝-0.001313984，A 8 ＝-0.001182825，A 9 = 0.000882861; at the same time obtain T e At 5 ℃, T c And when the temperature is 55 ℃, the numerical value can be brought into a preset ten-coefficient model calculation rule to obtain the mass flow m of the compressor.
And then to step S4.
The compressor oil discharge amount m based on the determined compressor gas pressure difference deltap oil Preset lubricant density ρ oil And determining the opening degree of the electronic expansion valve according to the preset opening degree relation of the electronic expansion valve comprises the following steps: based on the determined compressor gas pressure difference deltap and compressor oil discharge m oil Preset lubricant density ρ oil Determining an actual flow coefficient C according to a preset electronic expansion valve opening relation vneed The method comprises the steps of carrying out a first treatment on the surface of the Based on the determined actual flow coefficient C vneed And determining the opening degree of the electronic expansion valve according to a preset opening degree calculation rule.
The preset electronic expansion valve opening relation is as follows:
wherein C is vneed For the actual flow coefficient, m oil For compressor oil discharge amount ρ oil Is the oil density, Δp is the differential pressure. The preset opening degree calculation rule is as follows: a=c v X 2500; wherein C is v And A is the opening value of the oil return electronic expansion valve and is the flow coefficient. Wherein the actual flow coefficient C vneed Equivalent to flow coefficient C v 。
Notably, are: the compressor mass flow rate may be selected in one of the above-described calculation modes, and the first calculation mode is preferred in this embodiment.
The evaporator 7 and the condenser 9 in the refrigerating system of the air conditioner are both provided with fans in a matched mode.
In order to achieve the above embodiments, an embodiment of a second aspect of the present invention provides an air conditioner, including an air conditioner refrigeration system according to the embodiment of the first aspect of the present invention, so that an oil return electronic expansion valve adapts to oil return requirements of compressors on lubricating oil under different working conditions, and a refrigerant waste and a lubrication capacity deficiency are avoided.
In order to achieve the foregoing embodiments, another embodiment of the present application further provides an electronic device, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor, where the processor executes the program to implement the steps of configuring the oil return control device in the air conditioner refrigeration system according to the foregoing embodiments.
Wherein the storage medium may be a volatile or nonvolatile computer readable storage medium.
In order to achieve the foregoing embodiments, another embodiment of the present application further provides a computer readable storage medium, on which a computer program is stored, where the program when executed by a processor implements the steps of configuring an oil return control device in a refrigeration system of an air conditioner according to the foregoing embodiments, and specifically, reference may be made to the foregoing method embodiments, which are not described herein again.
Wherein the above-mentioned computer program product may be realized in particular by means of hardware, software or a combination thereof. In one alternative embodiment, the computer program product is embodied as a computer storage medium that, in another alternative embodiment,
the computer program product is embodied as a software product, such as a software development kit (Software Development Kit, SDK) or the like.
It will be appreciated that prior to using the technical solutions disclosed in the embodiments of the present disclosure, the user should be informed and authorized of the type, usage range, usage scenario, etc. of the personal information related to the present disclosure in an appropriate manner according to the relevant legal regulations.
It will be clear to those skilled in the art that, for convenience and brevity of description, reference may be made to the corresponding process in the foregoing method embodiment for the specific working process of the above-described system, which is not described herein again. In several embodiments provided in the present disclosure, it should be understood that the disclosed system, electronic device, and method may be implemented in other manners. The above-described apparatus embodiments are merely illustrative, for example, the division of the units is merely a logical function division, and there may be other manners of division in actual implementation, and for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some communication interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in each embodiment of the present disclosure may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a non-volatile computer readable storage medium executable by a processor. Based on such understanding, the technical solution of the present disclosure may be embodied in essence or a part contributing to the prior art or a part of the technical solution, or in the form of a software product stored in a storage medium, including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in the embodiments of the present disclosure. And the aforementioned storage medium includes: USB flash disk, mobile hard disk, read-Only memory (Read-Only)
Memory, ROM), random access Memory (Random Access Memory, RAM), magnetic or optical disks, and the like.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.
Claims (10)
1. The refrigerating system of the air conditioner comprises a compressor and an oil separator and is characterized by further comprising an oil return channel, wherein an oil inlet of the oil return channel is connected to an oil outlet of the oil separator, and an oil outlet of the oil return channel is connected to an air suction port of the compressor, wherein an electronic expansion valve is arranged on the oil return channel and is used for adjusting the oil return amount from the oil separator to the compressor;
the oil return control device is used for adjusting the oil return amount from the oil separator to the compressor by controlling the opening of the electronic expansion valve;
the oil return control device is configured to:
acquiring suction pressure and discharge pressure of a compressor;
calculating the oil discharge amount of the compressor;
determining a compressor gas pressure differential based on the obtained suction pressure and discharge pressure of the compressor;
determining the opening of the electronic expansion valve based on the determined gas pressure difference of the compressor, the oil discharge amount of the compressor, the preset lubricating oil density and the preset opening relation of the electronic expansion valve;
and adjusting the opening of the electronic expansion valve according to the determined opening of the electronic expansion valve.
2. The air conditioner cooling system as set forth in claim 1, wherein said calculating a compressor discharge amount step includes:
acquiring the oil discharge rate of lubricating oil of the frequency of the compressor;
calculating the mass flow of the compressor;
and calculating the oil discharge amount of the compressor according to the oil discharge rate of the lubricating oil of the frequency of the compressor, the mass flow of the compressor and the preset oil discharge amount calculation relation.
3. The air conditioner refrigerant system as set forth in claim 2, wherein said step of calculating a compressor mass flow rate includes:
calculating a refrigerant suction density and a compressor volumetric flow;
the compressor mass flow is calculated based on the calculated refrigerant suction density, the compressor volume flow and a preset mass flow calculation relationship.
4. An air conditioner refrigeration system as recited in claim 3 wherein said step of calculating a refrigerant suction density includes:
acquiring the suction temperature of the compressor;
the refrigerant suction density is calculated based on the obtained suction temperature of the compressor, suction pressure of the compressor, a preset refrigerant type, and a preset refrigerant state equation.
5. An air conditioner refrigeration system as set forth in claim 3 wherein said step of calculating a compressor volumetric flow rate includes:
acquiring the real-time rotating speed of a compressor;
and calculating the volume flow of the compressor based on the acquired real-time rotating speed of the compressor, the preset compressor displacement and the preset volume flow calculation relation.
6. The air conditioner refrigerant system as set forth in claim 2, wherein said step of calculating a compressor mass flow rate includes:
acquiring the rotation speed of a compressor, the evaporation temperature of an evaporator and the condensation temperature of a condenser;
obtaining a flow ten coefficient based on the obtained rotation speed of the compressor and a preset flow ten coefficient obtaining rule;
and calculating the mass flow of the compressor according to the obtained evaporation temperature of the evaporator, the condensation temperature of the condenser and the ten coefficients of flow and a preset multi-element calculation rule.
7. The air conditioner refrigerant system as set forth in claim 1, wherein said step of determining the opening degree of the electronic expansion valve based on the determined compressor gas pressure difference, compressor discharge amount, preset lubricant density, and preset electronic expansion valve opening degree relationship includes:
determining an actual flow coefficient based on the determined compressor gas pressure difference, the compressor oil discharge amount, the preset lubricating oil density and the preset electronic expansion valve opening relation;
and determining the opening degree of the electronic expansion valve based on the determined actual flow coefficient and a preset opening degree calculation rule.
8. The air conditioner refrigerant system as set forth in claim 7, wherein said predetermined electronic expansion valve opening relationship is:
wherein C is vneed For the actual flow coefficient, m oil For compressor oil discharge amount ρ oil Is the oil density, Δp is the differential pressure.
9. An air conditioner, characterized in that: comprising an air conditioner refrigeration system as claimed in any one of claims 1 to 8.
10. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of configuring an oil return control device in an air conditioner refrigeration system as claimed in any one of claims 1 to 8 when the program is executed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410163442.1A CN117847847A (en) | 2024-02-05 | 2024-02-05 | Air conditioner refrigerating system, air conditioner and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410163442.1A CN117847847A (en) | 2024-02-05 | 2024-02-05 | Air conditioner refrigerating system, air conditioner and electronic equipment |
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| CN117847847A true CN117847847A (en) | 2024-04-09 |
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| CN202410163442.1A Pending CN117847847A (en) | 2024-02-05 | 2024-02-05 | Air conditioner refrigerating system, air conditioner and electronic equipment |
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| Country | Link |
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| CN (1) | CN117847847A (en) |
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