CN113864196A - Rotary compressor, air conditioner and control method of air conditioner - Google Patents
Rotary compressor, air conditioner and control method of air conditioner Download PDFInfo
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- CN113864196A CN113864196A CN202111215353.XA CN202111215353A CN113864196A CN 113864196 A CN113864196 A CN 113864196A CN 202111215353 A CN202111215353 A CN 202111215353A CN 113864196 A CN113864196 A CN 113864196A
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000003507 refrigerant Substances 0.000 claims abstract description 95
- 230000002093 peripheral effect Effects 0.000 claims abstract description 8
- 238000010521 absorption reaction Methods 0.000 claims description 8
- 230000001276 controlling effect Effects 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 239000007788 liquid Substances 0.000 abstract description 26
- 230000008569 process Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 4
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/04—Heating; Cooling; Heat insulation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/06—Silencing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B31/00—Compressor arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/28—Means for preventing liquid refrigerant entering into the compressor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Signal Processing (AREA)
- Human Computer Interaction (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The invention discloses a rotary compressor, an air conditioner and an air conditioner control method, which are used for solving the problem that the service life of the compressor is influenced by air suction and liquid entrainment of the compressor under a special working condition. The invention relates to a rotary compressor, comprising: the outer surface of the shell is provided with a compressor refrigerant suction port; and the heat exchange tube is arranged on the peripheral surface of the shell, one end of the heat exchange tube is communicated with the refrigerant suction port of the compressor, and the other end of the heat exchange tube is used as a refrigerant air inlet. The heat exchange tube is arranged on the outer surface of the shell of the compressor, and because the temperature of the inner surface of the shell is higher in the working process of the compressor, when the compressor sucks air, supercooled refrigerant enters the refrigerant in the heat exchange tube to absorb heat, so that the temperature of the refrigerant is increased, liquid refrigerant is prevented from entering the compressor to cause liquid impact, and the running noise of the compressor is reduced; meanwhile, the heat exchange tube is arranged to replace a liquid storage tank of the traditional rotary compressor, so that the cost can be reduced, the transportation and the storage of the compressor are facilitated, and the structure of the compressor is more compact.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a rotary compressor, an air conditioner and a control method of the air conditioner.
Background
As all manufacturers of the air conditioners carry out cost reduction and efficiency improvement at present, the shell of the outer shell and the condenser are gradually reduced. The condition of air suction and liquid carrying is very easy to occur under some special working conditions, and long-time operation can cause abrasion to the internal structure of the compressor and even cause unrecoverable failure of the compressor.
Disclosure of Invention
In view of the above, the invention discloses a rotary compressor, an air conditioner and an air conditioner control method, which are used for solving the problem that the service life of the compressor is influenced by air suction and liquid carrying of the compressor under a special working condition.
In order to achieve the above object, the invention adopts the following technical scheme:
a first aspect of the present invention discloses a rotary compressor, comprising: the outer surface of the shell is provided with a compressor refrigerant suction port; and the heat exchange tube is arranged on the peripheral surface of the shell, one end of the heat exchange tube is communicated with the refrigerant suction port of the compressor, and the other end of the heat exchange tube is used as a refrigerant air inlet and is used for leading in a refrigerant to flow through the heat exchange tube before the refrigerant enters the refrigerant suction port of the compressor.
Further optionally, the heat exchange tube is a coiled tube or a spiral tube.
Further optionally, the heat exchange tube is a spiral tube, the number of turns of the spiral tube is Q, and Q is H/(1.5 x d r), where H is the height of the shell, d is the pitch of the spiral tube, and r is the radius of the spiral tube.
Further optionally, the rotary compressor further comprises a shell cover, the shell cover is arranged on the outer peripheral surface of the shell, the heat exchange tube is located between the outer peripheral surface of the shell and the inner surface of the shell cover, and the other end of the heat exchange tube extends out of the shell cover and is fixed on the shell cover.
In a second aspect, the invention discloses an air conditioner, comprising the rotary compressor of the first aspect.
Further optionally, the air conditioner further comprises a condenser, an evaporator, an expansion valve and a four-way valve, wherein a compressor refrigerant exhaust port is arranged on the shell, the compressor refrigerant exhaust port and the refrigerant air inlet are communicated with two interfaces of the four-way valve, one of the other two interfaces of the four-way valve is communicated with a refrigerant outlet of the condenser, the other interface of the four-way valve is communicated with a refrigerant inlet of the evaporator, and a refrigerant outlet of the condenser is communicated with a refrigerant inlet of the evaporator through the expansion valve.
A third aspect of the present invention discloses a control method of the air conditioner of the second aspect, the control method comprising: and when the first operation of the rotary compressor or the stop time of the rotary compressor after the operation is more than or equal to the first preset time, controlling the expansion valve to be fully closed, and preheating the rotary compressor in the second preset time.
Further optionally, the second preset time is t, t is t1 +/Δ t, Δ t is (60-Tt1)/10, where T t1 is an exhaust temperature of the refrigerant at time t1 of the preheating operation of the rotary compressor, and when Δ t is less than 0, Δ t is 0.
Further optionally, after the preheating operation of the rotary compressor is finished, the heat absorption capacity of the refrigerant in the heat exchange tube is improved by adjusting the operation frequency of the compressor and the opening degree of the expansion valve.
Further optionally, the increasing the heat absorption capacity of the refrigerant in the heat exchange tube by adjusting the operating frequency of the rotary compressor and the opening degree of the expansion valve includes:
when T isTemperature of air intakeLess than 0 ℃ and satisfies F0＜F1When the current is over;
F＝F0+A*[(Touter ring-TOuter tube)/(TInner pipe-TInner ring)]；
Wherein, TTemperature of air intakeIs the temperature of the refrigerant at the refrigerant suction port of the compressor, F0For the real-time operating frequency of rotary compressors, F1The upper limit frequency, T, of the rotary compressor operation corresponding to the outdoor ambient temperatureOuter ringIs the outdoor ambient temperature, TInner ringIs the indoor ambient temperature, TInner pipeIs the temperature of the inner tube of the evaporator, TOuter tubeF is the regulation frequency of the rotary compressor, and a is a constant.
Further optionally, the increasing the temperature of the inner surface of the casing by adjusting the operation frequency of the rotary compressor and the opening degree of the expansion valve comprises:
when T isTemperature of air intakeLess than 0 ℃ and satisfies F0＜F1When the current is over;
P＝P0+B*(Ttemperature of air intake-TOuter tube)+C；
Wherein, TTemperature of air intakeIs the temperature of the refrigerant at the refrigerant suction port of the compressor, F0For the real-time operating frequency of rotary compressors, F1The upper limit frequency, T, of the rotary compressor operation corresponding to the outdoor ambient temperatureOuter tubeThe temperature of the outer tube of the condenser, P the regulating opening of the expansion valve, P0B, C is a constant value for the opening of the expansion valve in real time.
Has the advantages that: the heat exchange tube is arranged on the outer surface of the shell of the compressor, and because the temperature of the inner surface of the shell is higher in the working process of the compressor, when the compressor sucks air, supercooled refrigerant enters the refrigerant in the heat exchange tube to absorb heat, so that the temperature of the refrigerant is increased, liquid refrigerant is prevented from entering the compressor to cause liquid impact, and the running noise of the compressor is reduced; meanwhile, the heat exchange tube is arranged to replace a liquid storage tank of the traditional rotary compressor, so that the cost can be reduced, the transportation and the storage of the compressor are facilitated, the structure of the compressor is more compact, and the miniaturization of the compressor is more facilitated.
Drawings
The above and other objects, features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings. The drawings described below are merely exemplary embodiments of the present disclosure, and other drawings may be derived by those skilled in the art without inventive effort.
Fig. 1 is a front view showing a rotary compressor with a shell cover in embodiment 1 of the present invention;
fig. 2 is a front view showing a rotary compressor without a shell cover according to embodiment 1 of the present invention;
FIG. 3 shows a top view of FIG. 1;
fig. 4 is a flowchart showing a control method of an air conditioner in embodiment 3 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and "a" and "an" generally include at least two, but do not exclude at least one, unless the context clearly dictates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a commodity or system that includes the element.
To further illustrate the technical solution of the present invention, the following specific examples are provided with reference to fig. 1 to 4.
Example 1
In the present embodiment, a rotary compressor is provided, as shown in fig. 1-2, including a shell 1 and a heat exchange tube 2, where the outer surface of the shell 1 is provided with a compressor refrigerant suction port 11; the heat exchange tube 2 is arranged on the peripheral surface of the shell 1, one end of the heat exchange tube 2 is communicated with the refrigerant suction port 11 of the compressor, and the other end of the heat exchange tube is used as a refrigerant inlet 21 for leading in a refrigerant to flow through the heat exchange tube before the refrigerant enters the refrigerant suction port of the compressor.
In order to improve the heat exchange effect and enable the liquid refrigerant to change into a gaseous state by absorbing the heat of the compressor through the heat exchange tube 2, in an embodiment of the present embodiment, the heat exchange tube 2 is a coiled tube or a spiral tube.
In yet another embodiment of the present embodiment, the heat exchange tube 2 is a spiral tube, the number of turns of the spiral tube is Q, and Q is H/(1.5 × d × r), where H is the height of the shell, d is the pitch of the spiral tube, and r is the radius of the spiral tube. Not only can prevent the incomplete evaporation of the refrigerant in the air suction coil pipe caused by insufficient winding, but also can reduce the energy loss caused by too long air suction coil pipe. Optionally, the number of turns of the spiral pipe is 5-7.
It should be noted that the radius of the spiral pipe refers to one half of the outer diameter (pipe diameter) of the spiral pipe.
In an embodiment of this embodiment, in this embodiment, the inner surface of the heat exchange tube is provided with a thread, so that not only is the heat exchange efficiency improved, but also the liquid refrigerant can be further prevented from flowing into the compressor shell. If the refrigerant is in a gas-liquid mixed state, particularly when the compressor is just started to be low in temperature or the compressor runs at a low frequency, the temperature of the shell of the compressor is low, the refrigerant cannot fully absorb heat, the liquid refrigerant flowing out of the evaporator can be reserved in the thread groove, and the reserved liquid refrigerant is evaporated into a gas state to flow into the shell of the compressor along with the gradual rise of the temperature of the compressor. The inner surface of the heat exchange tube can also be provided with a plurality of annular bulges, and a groove is formed between every two adjacent annular bulges, so that the same effect can be achieved. Further optionally, in this embodiment, the casing 1 may further include an inner casing and an outer casing, the inner casing and the outer casing may form a sealed hollow cavity, the outer casing is provided with a compressor refrigerant suction port 11 for communicating the hollow cavity, the inner casing is provided with a refrigerant inlet for communicating the hollow cavity, the refrigerant inlet is higher than the compressor refrigerant suction port 11, if a liquid refrigerant exists in the refrigerant, the liquid refrigerant may directly enter the hollow cavity and flow into the bottom of the hollow cavity, and a gaseous refrigerant flows into the compressor from the refrigerant inlet.
Further alternatively, as shown in fig. 1 and 3, the rotary compressor further includes a shell 3, the shell 3 is covered on the outer peripheral surface of the shell 1, the heat exchange tube 2 is located between the outer peripheral surface of the shell 1 and the inner surface of the shell 3, and the other end of the heat exchange tube 2 extends from the shell 3 and is fixed on the shell 3. Through setting up the clamshell 3, can play the effect of protection to heat exchange tube 2, also play the effect of being equipped with refrigerant air inlet 21 one end fixed to heat exchange tube 2.
Under the heating working condition of the air conditioner, compared with the conventional compressor, the suction temperature is below 0 ℃, the residual temperature of the compressor is utilized to heat the suction coil, the temperature of the compressor is reduced, the service life of the internal winding of the compressor and the refrigeration oil is prolonged, the temperature of a refrigerant suction port 11 of the compressor is increased through heat exchange with the inner surface of the compressor, the hidden trouble that the compressor sucks air and carries liquid can be eliminated, the suction pressure can be increased, the pressure difference of a suction and exhaust working cavity of the compressor is reduced, the compression ratio is improved, and therefore the power consumption is reduced.
Example 2
The present invention provides an air conditioner including the rotary compressor described in embodiment 1.
Specifically, the air conditioner further comprises a condenser, an evaporator, an expansion valve and a four-way valve, wherein a compressor refrigerant exhaust port is formed in the shell, the compressor refrigerant exhaust port and the refrigerant air inlet are communicated with two interfaces of the four-way valve, one of the other two interfaces of the four-way valve is communicated with a refrigerant outlet of the condenser, the other interface of the four-way valve is communicated with a refrigerant inlet of the evaporator, and a refrigerant outlet of the condenser is communicated with the refrigerant inlet of the evaporator through the expansion valve.
Because the rotary compressor has no liquid storage tank structure, the four-way valve component of the outdoor unit is directly connected with the suction pipe and the exhaust pipe, the occupied space of the compressor is reduced, a cold source of the liquid storage tank is eliminated, and the problem of corrosion of sound absorbing cotton caused by condensed water of the liquid storage tank is solved.
Example 3
When the compressor is operated for the first time or the shutdown time is long, as shown in fig. 4, the temperature in the shell 1 of the rotary compressor is low, and if the refrigerant discharged from the evaporator enters the compressor from the heat exchange tube, the refrigerant cannot absorb the temperature in the shell 1 of the compressor, and may enter the compressor in a liquid state to cause a liquid impact phenomenon. And correspondingly controlling the air conditioner when the compressor operates for the first time or the shutdown time is long, so as to avoid the liquid impact phenomenon.
The present embodiment provides the control method of the air conditioner described in embodiment 2, including: and when the first operation of the rotary compressor or the stop time of the rotary compressor after the operation is more than or equal to the first preset time, controlling the expansion valve to be fully closed, and preheating the rotary compressor in the second preset time. When the compressor is started up by the air conditioner for the first time or when the compressor is stopped for a long time, the expansion valve is fully closed, so that a refrigerant cannot flow back into the compressor from the evaporator, the compressor is preheated, and the expansion valve is opened after the temperature of the compressor is raised to a certain temperature.
Optionally, in this embodiment, the first preset time is 5 min.
Preferably, the second preset time is t, t is t1 +/Δ t, Δ t is (60-Tt1)/10, where T t1 is the discharge temperature of the refrigerant at t1 time of the preheating operation of the rotary compressor, and when Δ t is less than 0, Δ t is 0. Optionally, t1 is 3min, and Δ t is less than or equal to 1.5 min.
Further, after the preheating operation of the rotary compressor is finished, the heat absorption capacity of the refrigerant in the heat exchange tube is improved by adjusting the operation frequency of the rotary compressor and the opening degree of the expansion valve. Adjusting the operating frequency of the rotary compressor to improve the heat absorption capacity of the refrigerant in the heat exchange tube specifically comprises:
when T isTemperature of air intakeLess than 0 ℃ and satisfies F0＜F1When the current is over;
F＝F0+A*[(Touter ring-TOuter tube)/(TInner pipe-TInner ring)]；
Adjusting the opening degree of the expansion valve to improve the heat absorption capacity of the refrigerant in the heat exchange tube specifically comprises:
when T isTemperature of air intakeLess than 0 ℃ and satisfies F0＜F1When the current is over;
P＝P0+B*(Ttemperature of air intake-TOuter tube)+C；
Wherein, TTemperature of air intakeIs the temperature of the refrigerant at the refrigerant suction port of the compressor, F0For the real-time operating frequency of rotary compressors, F1The upper limit frequency, T, of the rotary compressor operation corresponding to the outdoor ambient temperatureOuter ringIs the outdoor ambient temperature, TInner ringFor indoor environmentTemperature, TInner pipeIs the temperature of the inner tube of the evaporator, TOuter tubeThe temperature of the outer pipe of the condenser, F the regulation frequency of the rotary compressor, P the regulation opening of the expansion valve, P0A, B, C is a constant value for the opening of the expansion valve in real time.
After the rotary compressor is preheated and operated, in the process of refrigeration, the relationship between the heat and the refrigerating capacity of the compressor generated under different frequencies and working environments is utilized through automatic adjustment of the expansion valve and the frequency of the compressor, so that the heat of the compressor can be fully absorbed when a refrigerant flows back to the heat exchange tube, the refrigerant is gasified and heated and then enters the compressor, on one hand, the operation frequency of the compressor and the automatic adjustment of the expansion valve are prevented according to the above relationship, the phenomenon that the low-temperature liquid refrigerant is not enough to absorb the heat to be evaporated into a gas state and enters the compressor to cause liquid impact is avoided, the hidden trouble that the compressor absorbs gas and carries liquid is eliminated, meanwhile, the suction pressure can be increased, the pressure difference of a suction and exhaust working cavity of the compressor is reduced, the compression ratio is improved, and the power consumption is reduced.
Exemplary embodiments of the present disclosure are specifically illustrated and described above. It is to be understood that the present disclosure is not limited to the precise arrangements, instrumentalities, or instrumentalities described herein; on the contrary, the disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (11)
1. A rotary compressor, comprising:
the outer surface of the shell is provided with a compressor refrigerant suction port;
and the heat exchange tube is coiled on the peripheral surface of the shell, one end of the heat exchange tube is communicated with the refrigerant suction port of the compressor, and the other end of the heat exchange tube is used as a refrigerant air inlet and is used for leading in a refrigerant to flow through the heat exchange tube before the refrigerant enters the refrigerant suction port of the compressor.
2. The rotary compressor of claim 1, wherein the heat exchange pipe is a coil pipe or a spiral pipe.
3. The rotary compressor of claim 1, wherein the heat exchange pipe is a spiral pipe having a number of turns of Q, Q H/(1.5 d r), wherein H is a height of the shell, d is a pitch of the spiral pipe, and r is a radius of the spiral pipe.
4. The rotary compressor of claim 1, further comprising a shell cover provided at the outer circumferential surface of the shell, wherein the heat exchange pipe is located between the outer circumferential surface of the shell and the inner surface of the shell cover, and the other end of the heat exchange pipe protrudes from the shell cover and is fixed to the shell cover.
5. An air conditioner characterized by comprising a rotary compressor according to any one of claims 1 to 4.
6. The air conditioner as claimed in claim 5, further comprising a condenser, an evaporator, an expansion valve and a four-way valve, wherein the housing is provided with a compressor refrigerant exhaust port, the compressor refrigerant exhaust port and the refrigerant inlet port are communicated with two ports of the four-way valve, one of the other two ports of the four-way valve is communicated with a refrigerant outlet of the condenser, the other port of the four-way valve is communicated with a refrigerant inlet of the evaporator, and a refrigerant outlet of the condenser is communicated with a refrigerant inlet of the evaporator through the expansion valve.
7. A control method of an air conditioner according to claim 6, comprising:
and when the first operation of the rotary compressor or the stop time of the rotary compressor after the operation is more than or equal to the first preset time, controlling the expansion valve to be fully closed, and preheating the rotary compressor in the second preset time.
8. The control method according to claim 7, wherein the second preset time is t, t-t 1+△t，△t＝(60-Tt1) /10, wherein, Tt1And when the delta t is less than 0, the delta t value is 0, wherein the discharge temperature of the refrigerant is t1 time after the rotary compressor is preheated.
9. The control method as claimed in claim 7, wherein after the preheating operation of the rotary compressor is finished, the heat absorption capacity of the refrigerant in the heat exchange tube is increased by adjusting the operation frequency of the compressor and the opening degree of the expansion valve.
10. The method as claimed in claim 9, wherein the increasing of the heat absorption capacity of the refrigerant in the heat exchange tube by adjusting the operation frequency of the rotary compressor and the opening degree of the expansion valve comprises:
when T isTemperature of air intakeLess than 0 ℃ and satisfies F0＜F1When the current is over;
F＝F0+A*[(Touter ring-TOuter tube)/(TInner pipe-TInner ring)]；
Wherein, TTemperature of air intakeIs the temperature of the refrigerant at the refrigerant suction port of the compressor, F0For the real-time operating frequency of rotary compressors, F1The upper limit frequency, T, of the rotary compressor operation corresponding to the outdoor ambient temperatureOuter ringIs the outdoor ambient temperature, TInner ringIs the indoor ambient temperature, TInner pipeIs the temperature of the inner tube of the evaporator, TOuter tubeF is the regulation frequency of the rotary compressor, and a is a constant.
11. The control method as claimed in claim 9 or 10, wherein the increasing of the heat absorption capacity of the refrigerant in the heat exchange tube by adjusting the operation frequency of the rotary compressor and the opening degree of the expansion valve comprises:
when T isTemperature of air intakeLess than 0 ℃ and satisfies F0＜F1When the current is over;
P＝P0+B*(Ttemperature of air intake-TOuter tube)+C；
Wherein, TTemperature of air intakeAs refrigerant of compressorTemperature of refrigerant at suction port, F0For the real-time operating frequency of rotary compressors, F1The upper limit frequency, T, of the rotary compressor operation corresponding to the outdoor ambient temperatureOuter tubeThe temperature of the outer tube of the condenser, P the regulating opening of the expansion valve, P0B, C is a constant value for the opening of the expansion valve in real time.
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Application publication date: 20211231 |