CN104048366A - Air conditioner, outdoor unit of air conditioner, heating air supplementing method and refrigeration air supplementing method - Google Patents
Air conditioner, outdoor unit of air conditioner, heating air supplementing method and refrigeration air supplementing method Download PDFInfo
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- CN104048366A CN104048366A CN201310085070.7A CN201310085070A CN104048366A CN 104048366 A CN104048366 A CN 104048366A CN 201310085070 A CN201310085070 A CN 201310085070A CN 104048366 A CN104048366 A CN 104048366A
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Abstract
The invention provides an outdoor unit of an air conditioner. The outdoor unit comprises a compressor, an outdoor heat exchanger, a first pipeline and an outdoor electronic expansion valve, wherein the first pipeline is used for connecting the indoor unit and the outdoor heat exchanger, the outdoor electronic expansion valve is connected in series onto the first pipeline, the compressor is a first double-rotor compressor, the first double-rotor compressor is provided with a first auxiliary air suction opening, a first main air suction opening and a first exhaust opening, the first main air suction opening is respectively connected with a four-way valve of the air conditioner, the outdoor unit also comprises a medium-pressure liquid storage tank positioned between the indoor unit and the outdoor electronic expansion valve, the medium-pressure liquid storage tank is connected in series onto the first pipeline and is provided with an air outlet, an inlet and a liquid outlet, the air outlet is connected with the first auxiliary air suction opening through a first auxiliary pipeline, and the inlet and the liquid outlet are respectively connected with the first pipeline. The outdoor unit of the air conditioner provided by the invention has the advantage that through the additional arrangement of the medium-pressure liquid storage tank and the adoption of the first double-rotor compressor, the low-temperature heating capability of the whole air conditioner is improved. The invention also provides the air conditioner, a heating air supplementing method of the air conditioner and a refrigeration air supplementing method of the air conditioner.
Description
Technical field
The present invention relates to air-conditioning technical field, more particularly, relate to the refrigeration supplementing method for air that heats supplementing method for air and air-conditioner of a kind of air-conditioner and off-premises station thereof, a kind of air-conditioner.
Background technology
Along with the development of air-conditioning technical, air-conditioner is widely used gradually.For air-conditioner, the quality of compressor directly affects the performance performance of air-conditioner.Due to the limitation of compressor itself, the temperature range of the normal operation of air-conditioning system is limited, has the not good problem of low-temperature heating ability.In heating process, decline along with environment temperature, the evaporating temperature of cold-producing medium declines, the specific volume of suction side cold-producing medium constantly increases, due to the compressor air suction constancy of volume, cause the inspiratory capacity of compressor to decline, the refrigerant amount of make to flow through outdoor heat exchanger and indoor heat exchanger reduces, the heating capacity of air-conditioner declines thereupon, is prone to the not good problem of low-temperature heating.
In addition, heat in process, the inspiratory capacity of the compressor moving in low temperature environment declines, and more easily causes the excessive discharge temperature of compressor, makes the reliability of compressor lower.
In addition, when high-temperature refrigeration, also can there is the not good problem of refrigerating capacity in air-conditioner.In process of refrigerastion, along with environment temperature rises, heat transfer temperature difference reduces, and the heat exchange of outdoor heat exchanger is more difficult, must improve refrigerant flow by raising frequency and improve heat exchange, but raising frequency can cause excessive discharge temperature, causes the reliability of compressor lower.
In sum, how improving the low-temperature heating ability of air-conditioner, is current those skilled in the art's problem demanding prompt solution.
Summary of the invention
The off-premises station that the object of this invention is to provide a kind of air-conditioner, to improve the low-temperature heating ability of air-conditioner.Another object of the present invention be to provide a kind of air-conditioner, a kind of air-conditioner heat supplementing method for air and refrigeration supplementing method for air.
To achieve these goals, the invention provides following technical scheme:
An off-premises station for air-conditioner, comprising: compressor, and outdoor heat exchanger, for connecting the first pipeline of indoor set and described outdoor heat exchanger, is serially connected with the outdoor electric expansion valve on described the first pipeline; Wherein, described compressor is the first two-spool compressor, and described the first two-spool compressor has: the first auxiliary air entry, the first main air entry and the first row gas port that are connected with the cross valve of described air-conditioner respectively;
Described off-premises station also comprises: for the pressure fluid reservoir between described indoor set and described outdoor electric expansion valve, described middle pressure fluid reservoir is serially connected with on described the first pipeline, and described middle pressure fluid reservoir has: the gas outlet being connected with the described first auxiliary air entry by the first auxiliary piping, import and the liquid outlet being connected with described the first pipeline respectively.
Preferably, the off-premises station of above-mentioned air-conditioner, also comprise second two-spool compressor in parallel with described the first two-spool compressor, described the second two-spool compressor has: the second auxiliary air entry being connected with described gas outlet by the second auxiliary piping, the second main air entry and the second row gas port being connected with described cross valve respectively.
Preferably, the off-premises station of above-mentioned air-conditioner, also comprises:
Be serially connected with the first aeration valve on described the first auxiliary piping;
Be serially connected with the second aeration valve on described the second auxiliary piping;
Detect outdoor temperature, and send the temperature sensor of temperature detection signal;
Detect the first running frequency of described the first two-spool compressor, and send the first sensor of the first detection signal;
Detect the second running frequency of described the second two-spool compressor, and send the second sensor of the second detection signal;
Be connected with described temperature sensor, described first sensor and described the first aeration valve respectively, receive described temperature detection signal and described the first detection signal, in heating operation, when being less than, outdoor temperature heats preset temperature, and described the first running frequency is greater than while heating predeterminated frequency, open the first controller of described the first aeration valve;
Be connected with described temperature sensor, described the second sensor and described the second aeration valve respectively, receive described temperature detection signal and described the second detection signal, in heating operation, when being less than, outdoor temperature heats preset temperature, and described the second running frequency is greater than while heating predeterminated frequency, opens the second controller of described the second aeration valve;
Be connected with described temperature sensor, described first sensor and described the first aeration valve respectively, receive described temperature detection signal and described the first detection signal, in refrigerating operaton, when outdoor temperature is greater than refrigeration preset temperature, and when described the first running frequency is greater than refrigeration predeterminated frequency, open the 3rd controller of described the first aeration valve;
Be connected with described temperature sensor, described the second sensor and described the second aeration valve respectively, receive described temperature detection signal and described the second detection signal, in refrigerating operaton, when outdoor temperature is greater than refrigeration preset temperature, and when described the second running frequency is greater than refrigeration predeterminated frequency, open the 4th controller of described the second aeration valve.
Preferably, the off-premises station of above-mentioned air-conditioner, also comprises: be arranged at described gas outlet, and detect the pressure sensor of described middle pressure fluid reservoir internal pressure.
The off-premises station of air-conditioner provided by the invention, by setting up middle pressure fluid reservoir and selecting the first two-spool compressor, heat in process, excessively cold liquid refrigerant in middle pressure fluid reservoir is passed into outdoor heat exchanger, thereby reduced the enthalpy of the cold-producing medium that enters outdoor heat exchanger, increased and entered the refrigerant temperature of outdoor heat exchanger and the temperature difference of outdoor temperature, thereby improved the evaporation capacity of liquid refrigerant, and then improved the inspiratory capacity of the first main air entry of the first two-spool compressor; Simultaneously, gaseous refrigerant in middle pressure fluid reservoir enters the first two-spool compressor from the first auxiliary air entry, and the gaseous refrigerant being compressed to after certain pressure with the gaseous refrigerant that enters the first two-spool compressor through the first primary air inlet mixes, further after compression, from first row gas port, discharge the first two-spool compressor, the further like this air inflow that increases by the first two-spool compressor.Therefore the off-premises station of the air-conditioner that the embodiment of the present invention provides has improved the air inflow of the first two-spool compressor in low-temperature heating process, and then improved the low-temperature heating ability of whole air-conditioner.
Off-premises station based on the above-mentioned air-conditioner providing, the present invention also provides a kind of air-conditioner, this air-conditioner comprises: indoor set and the off-premises station being connected with described indoor set, and described indoor set comprises indoor heat exchanger and the indoor electronic expansion valve being connected with described indoor heat exchanger; Wherein, described off-premises station is the off-premises station of the air-conditioner described in above-mentioned any one; Wherein, the middle pressure fluid reservoir of described off-premises station is between described indoor electronic expansion valve and described outdoor electric expansion valve.
Based on the above-mentioned air-conditioner providing, the present invention also provides a kind of supplementing method for air that heats of air-conditioner, and described air-conditioner has the off-premises station of air-conditioner described above, and the supplementing method for air that heats of described air-conditioner comprises step:
1) open air-conditioner, detect the first running frequency of the first two-spool compressor of outdoor temperature and described off-premises station;
2) when outdoor temperature is less than, heat preset temperature, and described the first running frequency is greater than while heating predeterminated frequency, controls the middle pressure fluid reservoir of described off-premises station to described the first two-spool compressor tonifying Qi.
Preferably, heating in supplementing method for air of above-mentioned air-conditioner, described off-premises station also comprises second two-spool compressor in parallel with described the first two-spool compressor, and described the second two-spool compressor has the second main air entry, the second auxiliary air entry and second row gas port; The described second auxiliary air entry is connected with described gas outlet by the second auxiliary piping;
Heating in supplementing method for air of described air-conditioner, described step 1) also comprises step: the second running frequency that detects described the second two-spool compressor;
Described step 2) also comprise step: when outdoor temperature is less than, heat preset temperature, and described the second running frequency is greater than while heating predeterminated frequency, controls described middle pressure fluid reservoir to described the second two-spool compressor tonifying Qi.
Preferably, the heating in supplementing method for air of above-mentioned air-conditioner, described off-premises station also comprises: be serially connected with the first aeration valve on described the first auxiliary piping, and be serially connected with the second aeration valve on described the second auxiliary piping;
Heating in supplementing method for air of described air-conditioner, described step 2) in, controlling described middle pressure fluid reservoir is specially to described the first two-spool compressor tonifying Qi: control described the first aeration valve and open; Controlling described middle pressure fluid reservoir is specially to described the second two-spool compressor tonifying Qi: control described the second aeration valve and open.
Preferably, the heating in supplementing method for air of above-mentioned air-conditioner, described in heat preset temperature and be-3 ℃, described in to heat predeterminated frequency be 80Hz.
Based on the above-mentioned air-conditioner providing, the present invention also provides a kind of refrigeration supplementing method for air of air-conditioner, and described air-conditioner has the off-premises station of above-mentioned air-conditioner, and the refrigeration supplementing method for air of described air-conditioner comprises step:
1) open air-conditioner, detect the first running frequency of the first two-spool compressor of outdoor temperature and described off-premises station;
2) when outdoor temperature is greater than refrigeration preset temperature, and described the first running frequency is greater than refrigeration during predeterminated frequency, controls the middle pressure fluid reservoir of described off-premises station to described the first two-spool compressor tonifying Qi.
Preferably, in the refrigeration supplementing method for air of above-mentioned air-conditioner, described off-premises station also comprises second two-spool compressor in parallel with described the first two-spool compressor, and described the second two-spool compressor has the second main air entry, the second auxiliary air entry and second row gas port; The described second auxiliary air entry is connected with described gas outlet by the second auxiliary piping;
In the refrigeration supplementing method for air of described air-conditioner, described step 1) also comprises step: the second running frequency that detects described the second two-spool compressor;
Described step 2) also comprise step: when outdoor temperature is greater than refrigeration preset temperature, and described the second running frequency is greater than refrigeration during predeterminated frequency, controls described middle pressure fluid reservoir to described the second two-spool compressor tonifying Qi.
Preferably, in the refrigeration supplementing method for air of above-mentioned air-conditioner, described off-premises station also comprises: be serially connected with the first aeration valve on described the first auxiliary piping, and be serially connected with the second aeration valve on described the second auxiliary piping;
In the refrigeration supplementing method for air of described air-conditioner, described step 2) in, control described middle pressure fluid reservoir and be specially to described the first two-spool compressor tonifying Qi: control described the first aeration valve and open; Controlling described middle pressure fluid reservoir is specially to described the second two-spool compressor tonifying Qi: control described the second aeration valve and open.
Preferably, in the refrigeration supplementing method for air of above-mentioned air-conditioner, described refrigeration preset temperature is 42 ℃, and described refrigeration predeterminated frequency is 75Hz.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The structural representation of the off-premises station of the air-conditioner that Fig. 1 provides for the embodiment of the present invention;
The enthalpy of air-conditioner cold-producing medium in heating process that the off-premises station of the air-conditioner that Fig. 2 provides for the embodiment of the present invention forms and pressure be related to schematic diagram;
The enthalpy of air-conditioner cold-producing medium in process of refrigerastion that the off-premises station of the air-conditioner that Fig. 3 provides for the embodiment of the present invention forms and pressure be related to schematic diagram.
In upper Fig. 1-3:
Cross valve 11, oil eliminator 12, outdoor heat exchanger 13, the second two-spool compressor 14, the second aeration valve 15, outdoor electric expansion valve 16, the first pipeline 17, the first aeration valve 18, middle pressure fluid reservoir 19, pressure sensor 110, the first two-spool compressor 111, gas-liquid separator 112, indoor heat exchanger 21, indoor electronic expansion valve 22.
The specific embodiment
The embodiment of the present invention provides a kind of off-premises station of air-conditioner, has improved the low-temperature heating ability of air-conditioner.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Please refer to accompanying drawing 1-3, the structural representation of the off-premises station of the air-conditioner that Fig. 1 provides for the embodiment of the present invention; The enthalpy of air-conditioner cold-producing medium in heating process that the off-premises station of the air-conditioner that Fig. 2 provides for the embodiment of the present invention forms and pressure be related to schematic diagram; The enthalpy of air-conditioner cold-producing medium in process of refrigerastion that the off-premises station of the air-conditioner that Fig. 3 provides for the embodiment of the present invention forms and pressure be related to schematic diagram.Wherein, in Fig. 1, in dotted line frame, be the off-premises station of air-conditioner.The abscissa of Fig. 2 and Fig. 3 is respectively the enthalpy h of cold-producing medium, and ordinate is respectively the common logarithm LgP of refrigerant pressure.
The off-premises station of the air-conditioner that the embodiment of the present invention provides, comprising: compressor, and outdoor heat exchanger 13, for connecting the first pipeline 17 of indoor set and outdoor heat exchanger 13, is serially connected with the outdoor electric expansion valve 16 on the first pipeline 17; Wherein, compressor is that the first two-spool compressor 111, the first two-spool compressors 111 have: the first auxiliary air entry, the first main air entry and the first row gas port that are connected with the cross valve 11 of air-conditioner respectively; Off-premises station also comprises: for the pressure fluid reservoir 19 between indoor set and outdoor electric expansion valve 16, middle pressure fluid reservoir 19 is serially connected with on the first pipeline 17, and middle pressure fluid reservoir 19 has: the gas outlet being connected with the first auxiliary air entry by the first auxiliary piping, import and the liquid outlet being connected with the first pipeline 17 respectively.
At present, indoor set mainly comprises indoor heat exchanger 21 and the indoor electronic expansion valve 22 being connected with indoor heat exchanger 21.In the off-premises station of the air-conditioner that the embodiment of the present invention provides, middle pressure fluid reservoir 19 is between indoor set and outdoor electric expansion valve 16, by the structure of indoor set, known middle pressure fluid reservoir 19 is between indoor electronic expansion valve 22 and outdoor electric expansion valve 16.Between the suction end of compressor and cross valve, need to arrange gas-liquid separator, between the exhaust end of compressor and cross valve, need to arrange oil eliminator, therefore be provided with gas-liquid separator 112 between the first main air entry of the first two-spool compressor 111 and cross valve 11, between the first row gas port of the first two-spool compressor 111 and cross valve 11, be provided with oil eliminator 12, the first air entry of the first two-spool compressor 111 is connected with cross valve 11 by gas-liquid separator, and the first row gas port of the first two-spool compressor 111 is connected with cross valve 11 by oil eliminator 12.Gas-liquid separator 112 and oil eliminator 12 be set to prior art, repeat no more herein.
In the off-premises station of the air-conditioner that above-described embodiment provides, middle pressure fluid reservoir 19 has flash distillation function, in flowing into, presses the liquid refrigerant in fluid reservoir 19 that flash distillation can occur; Meanwhile, middle pressure fluid reservoir 19 is can also storage area cold-producing medium, particularly high pressure drop condition (outer machine is low to be put) lower flows to the liquid refrigerant of outdoor heat exchanger 13 while shutting down from long tube connector.
The off-premises station of the air-conditioner that the embodiment of the present invention provides, installs itself and indoor set, the whole air-conditioner of formation, and as illustrated in fig. 1 and 2, the process that heats of whole air-conditioner is:
From the gaseous refrigerant (state point 23) of the first two-spool compressor 111 HTHP out, enter oil eliminator 12, the gaseous refrigerant of separating enters indoor heat exchanger 21 condensation through cross valve 11, after condensation, become the liquid refrigerant (state point 24) of cryogenic high pressure, the liquid refrigerant of cryogenic high pressure becomes the cold-producing medium two-phase mixture (state point 24 ') of pressing in low temperature through indoor electronic expansion valve 22 reducing pressure by regulating flows, the cold-producing medium two-phase mixture of pressing in low temperature enters middle pressure fluid reservoir 19, the gaseous refrigerant of middle pressure fluid reservoir 19 interior shwoots (state point 26) is got back to the first two-spool compressor 111 through the first subsidiary loop and the first auxiliary air entry, this loop is bypass, the continuous shwoot of cold-producing medium causes the liquid refrigerant in flash evaporation 19 excessively cold, cross cold liquid refrigerant (state point 25) through outdoor electric expansion valve 16 reducing pressure by regulating flows, be down to that evaporating pressure (state point 25 ') is laggard enters outdoor heat exchanger 13 heat absorption evaporation, the gaseous refrigerant (state point 21) of the high-temperature low-pressure after heat absorption evaporation is got back to the first two-spool compressor 111 through the first main air entry, and this loop is main road, after being compressed to certain pressure (state point 22), mixes with the gaseous refrigerant that flows into the first two-spool compressor 111 through bypass the gaseous refrigerant that flows into the first two-spool compressor 111 through main road, mixed cold-producing medium (state point 22 ') is further compressed, then from first row gas port, discharge the first two-spool compressor 111, form and heat circulation.
The off-premises station of the air-conditioner that the embodiment of the present invention provides, installs itself and indoor set, the whole air-conditioner of formation, and as shown in figures 1 and 3, the process of refrigerastion of whole air-conditioner is:
During refrigerating operaton, from the gaseous refrigerant (state point 13) of the first two-spool compressor 111 HTHP out, enter oil eliminator 12, the gaseous refrigerant of separating enters outdoor heat exchanger 13 condensation through cross valve 11, after condensation, become the liquid refrigerant (state point 14) of cryogenic high pressure, the liquid refrigerant of cryogenic high pressure becomes the cold-producing medium two-phase mixture (state point 14 ') of pressing in low temperature through outdoor electric expansion valve 16 reducing pressure by regulating flows, the cold-producing medium two-phase mixture of pressing in low temperature enters middle pressure fluid reservoir 19, the saturated gaseous refrigerant of middle pressure (state point 16) in middle pressure fluid reservoir 19 is got back to the first two-spool compressor 111 through the first subsidiary loop and the first auxiliary air entry, this loop is bypass, the continuous shwoot of cold-producing medium causes the liquid refrigerant in flash evaporation 19 excessively cold, cross cold liquid refrigerant (state point 15) through 22 throttlings again of indoor electronic expansion valve, become the cold-producing medium two-phase mixture (state point 15 ') of low-temp low-pressure, the cold-producing medium two-phase mixture of low-temp low-pressure enters indoor heat exchanger 21 evaporation, the gaseous refrigerant of the high-temperature low-pressure becoming after evaporation (state point 11) is got back to the first two-spool compressor 111 through the first main air entry, and this loop is main road, in the first two-spool compressor 111 inside, the cold-producing medium of high-temperature low-pressure is compressed to after certain pressure (state point 12), with from bypass, return the saturated gaseous refrigerant of pressure mix, mixed cold-producing medium (state point 12) is further compressed, then from first row gas port, discharge the first two-spool compressor 111, form kind of refrigeration cycle.
The off-premises station of the air-conditioner that the embodiment of the present invention provides, by setting up middle pressure fluid reservoir 19 and selecting the first two-spool compressor 111, heat in process, the interior excessively cold liquid refrigerant of middle pressure fluid reservoir 19 is passed into outdoor heat exchanger 13, thereby reduced the enthalpy of the cold-producing medium that enters outdoor heat exchanger 13, increased and entered the refrigerant temperature of outdoor heat exchanger 13 and the temperature difference of outdoor temperature, thereby improved the evaporation capacity of liquid refrigerant, and then improved the inspiratory capacity of the first main air entry of the first two-spool compressor 111; Simultaneously, gaseous refrigerant in middle pressure fluid reservoir 19 enters the first two-spool compressor 111 from the first auxiliary air entry, and the gaseous refrigerant being compressed to after certain pressure with the gaseous refrigerant that enters the first two-spool compressor 111 through the first primary air inlet mixes, further after compression, from first row gas port, discharge the first two-spool compressor 111, the further like this air inflow that increases by the first two-spool compressor 111.Therefore the off-premises station of the air-conditioner that the embodiment of the present invention provides has improved the air inflow of the first two-spool compressor 111 in low-temperature heating process, and then improved the low-temperature heating ability of whole air-conditioner.
Simultaneously, the off-premises station of the air-conditioner that the embodiment of the present invention provides, in low-temperature heating process, improved the air inflow of the first two-spool compressor 111, thereby reduced the delivery temperature of the first two-spool compressor 111, avoid the excessive discharge temperature of the first two-spool compressor 111, improved the reliability of the first two-spool compressor 111.
Simultaneously, the off-premises station of the air-conditioner that the embodiment of the present invention provides, by setting up middle pressure fluid reservoir 19 and selecting the first two-spool compressor 111, in process of refrigerastion, the interior excessively cold liquid refrigerant of middle pressure fluid reservoir 19 is passed into indoor heat exchanger 21, thereby reduced the enthalpy of the cold-producing medium that enters indoor heat exchanger 21, increased and entered the refrigerant temperature of indoor heat exchanger 21 and the temperature difference of indoor temperature, thereby caloric receptivity and the evaporation capacity of liquid refrigerant have been improved, thereby the inspiratory capacity of the first main air entry and the high-temperature refrigeration ability of whole air-conditioner of the first two-spool compressor 111 have been improved, simultaneously, gaseous refrigerant in middle pressure fluid reservoir 19 enters the first two-spool compressor 111 from the first auxiliary air entry, and the gaseous refrigerant being compressed to after certain pressure with the gaseous refrigerant that enters the first two-spool compressor 111 through the first primary air inlet mixes, further after compression, from first row gas port, discharge the first two-spool compressor 111, the further like this air inflow that increases by the first two-spool compressor 111.Therefore the off-premises station of the air-conditioner that the embodiment of the present invention provides, has improved the high-temperature refrigeration ability of whole air-conditioner.
In the off-premises station of the air-conditioner that above-described embodiment provides, middle pressure fluid reservoir 19 inside are middle pressure, because the refrigerant pressure that enters middle pressure fluid reservoir 19 is between evaporating pressure and condensing pressure.
In order further to optimize technique scheme, the off-premises station of the air-conditioner that above-described embodiment provides, also comprise: second two-spool compressor 14, the second two-spool compressors 14 in parallel with the first two-spool compressor 111 have: the second auxiliary air entry being connected with gas outlet by the second auxiliary piping, the second main air entry and the second row gas port being connected with described cross valve 11 respectively.Adopt two two-spool compressors in parallel, compare with a two-spool compressor of employing, the running frequency of two two-spool compressors in parallel is lower than the running frequency of a two-spool compressor, thereby improved the performance of air-conditioner in medium and low frequency section, improved the I PLV(integrated part load value of the off-premises station of whole air-conditioner, and then improved the efficiency of whole air-conditioner comprehensive part load performance coefficient).
Conventionally, between the suction end of compressor and cross valve, need to arrange gas-liquid separator, between the exhaust end of compressor and cross valve, need to arrange oil eliminator, therefore in the off-premises station of the air-conditioner that above-described embodiment provides, the second main air entry of the second two-spool compressor 14 is connected with cross valve 11 by gas-liquid separator 112, and the second row gas port of the second two-spool compressor 14 is connected with cross valve 11 by oil eliminator 12.
In the off-premises station of the air-conditioner that the embodiment of the present invention provides, when indoor refrigeration duty (or thermic load) demand acquires a certain degree, open the first two-spool compressor 111 and the second two-spool compressor 14 operations simultaneously, along with reducing gradually of refrigeration duty (or thermic load), when the operation of two-spool compressor is enough to satisfy the demands and efficiency is higher, opens the first two-spool compressor 111 operations or open the second two-spool compressor 14 operations.
For the ease of controlling to the first two-spool compressor 111 and the second two-spool compressor 14 tonifying Qi, the off-premises station of the air-conditioner that above-described embodiment provides, also comprises: be serially connected with the first aeration valve 18 on the first auxiliary piping; Be serially connected with the second aeration valve 15 on the second auxiliary piping; Detect outdoor temperature, and send the temperature sensor of temperature detection signal; Detect the first running frequency of the first two-spool compressor 111, and send the first sensor of the first detection signal; Detect the second running frequency of the second two-spool compressor 14, and send the second sensor of the second detection signal; Be connected with temperature sensor, first sensor and the first aeration valve 18 respectively, receive temperature detection signal and the first detection signal, in heating operation, when outdoor temperature is less than, heat preset temperature, and the first running frequency is greater than while heating predeterminated frequency, open the first controller of the first aeration valve 18; Be connected with temperature sensor, the second sensor and the second aeration valve 15 respectively, receive temperature detection signal and the second detection signal, in heating operation, when outdoor temperature is less than, heat preset temperature, and the second running frequency is greater than while heating predeterminated frequency, open the second controller of the second aeration valve 15; Be connected with temperature sensor, first sensor and the first aeration valve 18 respectively, receive temperature detection signal and the first detection signal, in refrigerating operaton, when outdoor temperature is greater than refrigeration preset temperature, and when the first running frequency is greater than refrigeration predeterminated frequency, open the 3rd controller of the first aeration valve 18; Be connected with temperature sensor, the second sensor and the second aeration valve 15 respectively, receive temperature detection signal and the second detection signal, in refrigerating operaton, when outdoor temperature is greater than refrigeration preset temperature, and when the second running frequency is greater than refrigeration predeterminated frequency, open the 4th controller of the second aeration valve 15.
The off-premises station of the air-conditioner that above-described embodiment provides, by controlling the unlatching of the first aeration valve 18 and the second aeration valve 15, control the first two-spool compressor 111 and the second two-spool compressor 14 are carried out to tonifying Qi, while not needing tonifying Qi, can close the first aeration valve 18 and the second aeration valve 15, thereby facilitated the control of tonifying Qi, thereby further improved the efficiency of air-conditioner.Preferably, controller calculates required air compensation, by the outer aperture of electromagnetic expanding valve 16 of conditioning chamber or the aperture of indoor electromagnetic expanding valve 22, regulates air compensation.When the required air compensation of air-conditioner is larger, turn the aperture of outdoor electromagnetic expanding valve 16 or the aperture of indoor electromagnetic expanding valve 22 down; The required air compensation of air-conditioner hour, tunes up the aperture of outdoor electromagnetic expanding valve 16 or the aperture of indoor electromagnetic expanding valve 22.Concrete, heat in process, the aperture by electromagnetic expanding valve in conditioning chamber 22 regulates air compensation; In process of refrigerastion, the aperture by the outer electromagnetic expanding valve 16 of conditioning chamber regulates air compensation.
In the off-premises station of the air-conditioner that above-described embodiment provides, the first controller, second controller, the 3rd controller and the 4th controller, can be integrated arbitrarily.For the ease of installing and manufacturing, preferentially to select, the first controller, second controller, the 3rd controller and the 4th controller are integrated in the control mainboard of the off-premises station of air-conditioner.
Preferably, the off-premises station of the air-conditioner that above-described embodiment provides, also comprises and is arranged at gas outlet, and in detecting, presses the pressure sensor 110 of fluid reservoir 19 internal pressures.Like this, be convenient to know the pressure of middle pressure fluid reservoir 19 interior gaseous refrigerants.
The off-premises station of the air-conditioner providing based on above-described embodiment, the embodiment of the present invention also provides a kind of air-conditioner, this air-conditioner comprises: indoor set and the off-premises station being connected with indoor set, and indoor set comprises indoor heat exchanger 21 and the indoor electronic expansion valve 22 being connected with indoor heat exchanger 21; Off-premises station is the off-premises station of the air-conditioner described in above-described embodiment; Wherein, the middle pressure fluid reservoir 19 of off-premises station is between indoor electronic expansion valve 22 and outdoor electric expansion valve 16.
The off-premises station of the air-conditioner providing due to above-described embodiment has above-mentioned technique effect, the air-conditioner that the embodiment of the present invention provides has the off-premises station of the air-conditioner that above-described embodiment provides, the air-conditioner that embodiment of the present invention provides also has corresponding technique effect, repeats no more herein.
The off-premises station of the air-conditioner providing based on above-described embodiment, the embodiment of the present invention also provides a kind of supplementing method for air that heats of air-conditioner, and this air-conditioner has the off-premises station of the air-conditioner that above-described embodiment provides, and the supplementing method for air that heats of this air-conditioner comprises step:
S01: open air-conditioner, detect the first running frequency of the first two-spool compressor 111 of outdoor temperature and off-premises station;
After air-conditioner starts to heat, detect the first running frequency of outdoor temperature and the first two-spool compressor 111.Wherein, outdoor temperature refers to outdoor environment temperature.Conventionally adopt temperature-sensitive bag to detect outdoor temperature, certainly also can adopt other temperature sensor.
S02: heat preset temperature when outdoor temperature is less than, and the first running frequency is greater than while heating predeterminated frequency, controls the middle pressure fluid reservoir 19 of off-premises station to the first two-spool compressor 111 tonifying Qi.
Heat preset temperature and heat predeterminated frequency, need to be according to the performance setting of air-conditioner, the embodiment of the present invention does not limit particularly to this, conventionally chooses to heat preset temperature and be-3 ℃, and heating predeterminated frequency is 80Hz.Middle pressure fluid reservoir 19 assists air entry to the first two-spool compressor 111 tonifying Qi through first.
The off-premises station of the air-conditioner providing due to above-described embodiment has above-mentioned technique effect, heating in supplementing method for air of the air-conditioner that the embodiment of the present invention provides, this air-conditioner has the off-premises station of the air-conditioner that above-described embodiment provides, the supplementing method for air that heats of the air-conditioner that embodiment of the present invention provides also has corresponding technique effect, repeats no more herein.
Preferably, heating in supplementing method for air of the air-conditioner that above-described embodiment provides, off-premises station also comprises that second two-spool compressor 14, the second two-spool compressors 14 in parallel with the first two-spool compressor 111 have the second main air entry, the second auxiliary air entry and second row gas port; The second auxiliary air entry is connected with gas outlet by the second auxiliary piping; Heating in supplementing method for air of above-mentioned air-conditioner, step S01 also comprises step: the second running frequency that detects the second two-spool compressor 14; Step S02 also comprises step: when outdoor temperature is less than, heat preset temperature, and the second running frequency is greater than while heating predeterminated frequency, presses fluid reservoir 19 to the second two-spool compressor 14 tonifying Qi in control.Like this, realized respectively to two two-spool compressor tonifying Qi, be conducive to improve the efficiency of whole air-conditioner.
For the ease of realizing the control to tonifying Qi, the heating in supplementing method for air of the air-conditioner that above-described embodiment provides, off-premises station also comprises: be serially connected with the first aeration valve 18 on the first auxiliary piping, and be serially connected with the second aeration valve 15 on the second auxiliary piping; Heating in supplementing method for air of above-mentioned air-conditioner, presses fluid reservoir 19 to be specially to the first two-spool compressor 111 tonifying Qi in controlling: to control the first aeration valve 18 and open in step S02; In control, press fluid reservoir 19 to be specially to the second two-spool compressor 14 tonifying Qi: to control the second aeration valve 15 and open.Certainly, the embodiment of the present invention also can realize tonifying Qi by miscellaneous part, such as switch etc. is set.
Preferably, heating in supplementing method for air of the air-conditioner that above-described embodiment provides, step S02 also comprises: when outdoor temperature is less than or equal to, heat preset temperature, and described the first running frequency is less than or equal to while heating predeterminated frequency, stopping middle pressure fluid reservoir 19 assists air entry to the first two-spool compressor 111 tonifying Qi through first, concrete, close the first aeration valve 18; When being less than or equal to, outdoor temperature heats preset temperature, and described the second running frequency is less than or equal to while heating predeterminated frequency, stop middle pressure fluid reservoir 19 through the second auxiliary air entry to the second two-spool compressor 14 tonifying Qi, concrete, close the second aeration valve 15.
Heating in supplementing method for air of the air-conditioner that above-described embodiment provides, also can calculate air compensation, and the aperture by electromagnetic expanding valve in conditioning chamber 22 regulates air compensation.When the required air compensation of air-conditioner is larger, turn the aperture of indoor electromagnetic expanding valve 22 down; The required air compensation of air-conditioner hour, tunes up the aperture of indoor electromagnetic expanding valve 22.
The off-premises station of the air-conditioner providing based on above-described embodiment, the embodiment of the present invention also provides a kind of refrigeration supplementing method for air of air-conditioner, and this air-conditioner has the off-premises station of the air-conditioner that above-described embodiment provides, and the refrigeration supplementing method for air of this air-conditioner comprises step:
S11: open air-conditioner, detect the first running frequency of the first two-spool compressor 111 of outdoor temperature and off-premises station;
Air-conditioner starts, after refrigeration, to detect the first running frequency of outdoor temperature and the first two-spool compressor 111.Wherein, outdoor temperature refers to outdoor environment temperature.Conventionally adopt temperature-sensitive bag to detect outdoor temperature, certainly also can adopt other temperature sensor.
S12: when outdoor temperature is greater than refrigeration preset temperature, and described the first running frequency is greater than refrigeration during predeterminated frequency, controls the middle pressure fluid reservoir 19 of off-premises station to described the first two-spool compressor 111 tonifying Qi.
Refrigeration preset temperature and refrigeration predeterminated frequency, need to be according to the performance setting of air-conditioner, and the embodiment of the present invention does not limit particularly to this, and conventionally choosing refrigeration preset temperature is 42 ℃, and refrigeration predeterminated frequency is 75Hz.Middle pressure fluid reservoir 19 assists air entry to described the first two-spool compressor 111 tonifying Qi through first.
The off-premises station of the air-conditioner providing due to above-described embodiment has above-mentioned technique effect, in the refrigeration supplementing method for air of the air-conditioner that the embodiment of the present invention provides, this air-conditioner has the off-premises station of the air-conditioner that above-described embodiment provides, the refrigeration supplementing method for air of the air-conditioner that embodiment of the present invention provides also has corresponding technique effect, repeats no more herein.
Preferably, in the refrigeration supplementing method for air of the air-conditioner that above-described embodiment provides, off-premises station also comprises that second two-spool compressor 14, the second two-spool compressors 14 in parallel with the first two-spool compressor 111 have the second main air entry, the second auxiliary air entry and second row gas port; The second auxiliary air entry is connected with described gas outlet by the second auxiliary piping; In the refrigeration supplementing method for air of above-mentioned air-conditioner, step S11 also comprises step: the second running frequency that detects the second two-spool compressor 14; Step S12 also comprises step: when outdoor temperature is greater than refrigeration preset temperature, and the second running frequency is greater than refrigeration during predeterminated frequency, presses fluid reservoir 19 to the second two-spool compressor 14 tonifying Qi in control.Like this, realized respectively to two two-spool compressor tonifying Qi, be conducive to improve the efficiency of whole air-conditioner.
For the ease of realizing the control to tonifying Qi, in the refrigeration supplementing method for air of the air-conditioner that above-described embodiment provides, off-premises station also comprises: be serially connected with the first aeration valve 18 on the first auxiliary piping, and be serially connected with the second aeration valve 15 on the second auxiliary piping; In the refrigeration supplementing method for air of above-mentioned air-conditioner, in described step S12, in control, press fluid reservoir 19 to be specially to the first two-spool compressor 111 tonifying Qi: to control the first aeration valve 18 and open; In control, press fluid reservoir 19 to be specially to the second two-spool compressor 14 tonifying Qi: to control the second aeration valve 15 and open.Certainly, the embodiment of the present invention also can realize tonifying Qi by miscellaneous part, such as switch etc. is set.
Preferably, in the refrigeration supplementing method for air of the air-conditioner that above-described embodiment provides, step S12 also comprises: when outdoor temperature is less than or equal to refrigeration preset temperature, and when the first running frequency is less than or equal to refrigeration predeterminated frequency, stopping middle pressure fluid reservoir 19 assists air entry to the first two-spool compressor 111 tonifying Qi through first, concrete, close the first aeration valve 18; When outdoor temperature is less than or equal to refrigeration preset temperature, and when described the second running frequency is less than or equal to refrigeration predeterminated frequency, stop middle pressure fluid reservoir 19 through the second auxiliary air entry to the second two-spool compressor 14 tonifying Qi, concrete, close the second aeration valve 15.
In the refrigeration supplementing method for air of the air-conditioner that above-described embodiment provides, also can calculate air compensation, the aperture by conditioning chamber exoelectron expansion valve 16 regulates air compensation.When the required air compensation of air-conditioner is larger, turn the aperture of outdoor electromagnetic expanding valve 16 down; The required air compensation of air-conditioner hour, tunes up the aperture of outdoor electromagnetic expanding valve 16.
Above-mentioned explanation to the disclosed embodiments, makes professional and technical personnel in the field can realize or use the present invention.To the multiple modification of these embodiment, will be apparent for those skilled in the art, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (13)
1. an off-premises station for air-conditioner, comprising: compressor, and outdoor heat exchanger, for connecting the first pipeline of indoor set and described outdoor heat exchanger, is serially connected with the outdoor electric expansion valve on described the first pipeline; It is characterized in that,
Described compressor is the first two-spool compressor, and described the first two-spool compressor has: the first auxiliary air entry, the first main air entry and the first row gas port that are connected with the cross valve of described air-conditioner respectively;
Described off-premises station also comprises: for the pressure fluid reservoir between described indoor set and described outdoor electric expansion valve, described middle pressure fluid reservoir is serially connected with on described the first pipeline, and described middle pressure fluid reservoir has: the gas outlet being connected with the described first auxiliary air entry by the first auxiliary piping, import and the liquid outlet being connected with described the first pipeline respectively.
2. the off-premises station of air-conditioner according to claim 1, it is characterized in that, also comprise second two-spool compressor in parallel with described the first two-spool compressor, described the second two-spool compressor has: the second auxiliary air entry being connected with described gas outlet by the second auxiliary piping, the second main air entry and the second row gas port being connected with described cross valve respectively.
3. the off-premises station of air-conditioner according to claim 2, is characterized in that, also comprises:
Be serially connected with the first aeration valve on described the first auxiliary piping;
Be serially connected with the second aeration valve on described the second auxiliary piping;
Detect outdoor temperature, and send the temperature sensor of temperature detection signal;
Detect the first running frequency of described the first two-spool compressor, and send the first sensor of the first detection signal;
Detect the second running frequency of described the second two-spool compressor, and send the second sensor of the second detection signal;
Be connected with described temperature sensor, described first sensor and described the first aeration valve respectively, receive described temperature detection signal and described the first detection signal, in heating operation, when being less than, outdoor temperature heats preset temperature, and described the first running frequency is greater than while heating predeterminated frequency, open the first controller of described the first aeration valve;
Be connected with described temperature sensor, described the second sensor and described the second aeration valve respectively, receive described temperature detection signal and described the second detection signal, in heating operation, when being less than, outdoor temperature heats preset temperature, and described the second running frequency is greater than while heating predeterminated frequency, opens the second controller of described the second aeration valve;
Be connected with described temperature sensor, described first sensor and described the first aeration valve respectively, receive described temperature detection signal and described the first detection signal, in refrigerating operaton, when outdoor temperature is greater than refrigeration preset temperature, and when described the first running frequency is greater than refrigeration predeterminated frequency, open the 3rd controller of described the first aeration valve;
Be connected with described temperature sensor, described the second sensor and described the second aeration valve respectively, receive described temperature detection signal and described the second detection signal, in refrigerating operaton, when outdoor temperature is greater than refrigeration preset temperature, and when described the second running frequency is greater than refrigeration predeterminated frequency, open the 4th controller of described the second aeration valve.
4. according to the off-premises station of the air-conditioner described in any one in claim 1-3, it is characterized in that, also comprise: be arranged at described gas outlet, and detect the pressure sensor of described middle pressure fluid reservoir internal pressure.
5. an air-conditioner, comprising: indoor set and the off-premises station being connected with described indoor set, and described indoor set comprises indoor heat exchanger and the indoor electronic expansion valve being connected with described indoor heat exchanger; It is characterized in that, described off-premises station is the off-premises station of the air-conditioner as described in any one in claim 1-4; Wherein, the middle pressure fluid reservoir of described off-premises station is between described indoor electronic expansion valve and described outdoor electric expansion valve.
Air-conditioner heat a supplementing method for air, it is characterized in that, described air-conditioner has the off-premises station of air-conditioner as claimed in claim 1, the supplementing method for air that heats of described air-conditioner comprises step:
1) open air-conditioner, detect the first running frequency of the first two-spool compressor of outdoor temperature and described off-premises station;
2) when outdoor temperature is less than, heat preset temperature, and described the first running frequency is greater than while heating predeterminated frequency, controls the middle pressure fluid reservoir of described off-premises station to described the first two-spool compressor tonifying Qi.
Air-conditioner as claimed in claim 6 heat supplementing method for air, it is characterized in that,
Described off-premises station also comprises second two-spool compressor in parallel with described the first two-spool compressor, and described the second two-spool compressor has the second main air entry, the second auxiliary air entry and second row gas port; The described second auxiliary air entry is connected with described gas outlet by the second auxiliary piping;
Heating in supplementing method for air of described air-conditioner, described step 1) also comprises step: the second running frequency that detects described the second two-spool compressor;
Described step 2) also comprise step: when outdoor temperature is less than, heat preset temperature, and described the second running frequency is greater than while heating predeterminated frequency, controls described middle pressure fluid reservoir to described the second two-spool compressor tonifying Qi.
Air-conditioner as claimed in claim 7 heat supplementing method for air, it is characterized in that, described off-premises station also comprises: be serially connected with the first aeration valve on described the first auxiliary piping, and be serially connected with the second aeration valve on described the second auxiliary piping;
Heating in supplementing method for air of described air-conditioner, described step 2) in, controlling described middle pressure fluid reservoir is specially to described the first two-spool compressor tonifying Qi: control described the first aeration valve and open; Controlling described middle pressure fluid reservoir is specially to described the second two-spool compressor tonifying Qi: control described the second aeration valve and open.
Air-conditioner as described in any one in claim 6-8 heat supplementing method for air, it is characterized in that, described in heat preset temperature and be-3 ℃, described in to heat predeterminated frequency be 80Hz.
10. a refrigeration supplementing method for air for air-conditioner, is characterized in that, described air-conditioner has the off-premises station of air-conditioner as claimed in claim 1, and the refrigeration supplementing method for air of described air-conditioner comprises step:
1) open air-conditioner, detect the first running frequency of the first two-spool compressor of outdoor temperature and described off-premises station;
2) when outdoor temperature is greater than refrigeration preset temperature, and described the first running frequency is greater than refrigeration during predeterminated frequency, controls the middle pressure fluid reservoir of described off-premises station to described the first two-spool compressor tonifying Qi.
The refrigeration supplementing method for air of 11. air-conditioners as claimed in claim 10, is characterized in that,
Described off-premises station also comprises second two-spool compressor in parallel with described the first two-spool compressor, and described the second two-spool compressor has the second main air entry, the second auxiliary air entry and second row gas port; The described second auxiliary air entry is connected with described gas outlet by the second auxiliary piping;
In the refrigeration supplementing method for air of described air-conditioner, described step 1) also comprises step: the second running frequency that detects described the second two-spool compressor;
Described step 2) also comprise step: when outdoor temperature is greater than refrigeration preset temperature, and described the second running frequency is greater than refrigeration during predeterminated frequency, controls described middle pressure fluid reservoir to described the second two-spool compressor tonifying Qi.
The refrigeration supplementing method for air of 12. air-conditioners as claimed in claim 11, is characterized in that, described off-premises station also comprises: be serially connected with the first aeration valve on described the first auxiliary piping, and be serially connected with the second aeration valve on described the second auxiliary piping;
In the refrigeration supplementing method for air of described air-conditioner, described step 2) in, control described middle pressure fluid reservoir and be specially to described the first two-spool compressor tonifying Qi: control described the first aeration valve and open; Controlling described middle pressure fluid reservoir is specially to described the second two-spool compressor tonifying Qi: control described the second aeration valve and open.
The refrigeration supplementing method for air of 13. air-conditioners as described in any one in claim 10-12, is characterized in that, described refrigeration preset temperature is 42 ℃, and described refrigeration predeterminated frequency is 75Hz.
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