CN105066526A - Air supplying and enthalpy increasing method and system for air conditioner and air conditioner - Google Patents
Air supplying and enthalpy increasing method and system for air conditioner and air conditioner Download PDFInfo
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Abstract
The invention relates to an air supplying and enthalpy increasing system and method for an air conditioner. The air supplying and enthalpy increasing system comprises a refrigerant circulating loop composed of a compressor, a reversing valve, an outdoor heat exchanger and an indoor heat exchanger. An evaporating device is connected to a main flow path between the outdoor heat exchanger and the indoor heat exchanger. An auxiliary flow path is led out from the main flow path between the outdoor heat exchanger and the indoor heat exchanger and connected to the compressor after heat exchange is conducted between the auxiliary flow path and the main flow path through the evaporating device. A throttling device is fixed to an inlet of an auxiliary flow path evaporating device. A first temperature sensing device is fixed to an outlet of the outdoor heat exchanger. A second temperature sensing device is fixed to an outlet of the auxiliary flow path evaporating device. A pressure sensing device is fixed to an air return pipe of the compressor. According to the air supplying and enthalpy increasing system and method for the air conditioner, the frosting speed of the outdoor heat exchanger can be lowered, it is guaranteed that the heat exchange capacity of the outdoor heat exchanger is brought into full play, and the degree of superheat of refrigerants at the outlet of outdoor heat exchanger is increased; meanwhile, the degree of superheat and the enthalpy value of refrigerants on the air return side of the compressor are increased, and thus the operating efficiency of the compressor is improved.
Description
Technical field
The present invention relates to air-conditioning technical field, particularly relate to a kind of air-conditioning tonifying Qi and increase enthalpy method, system and air-conditioning.
Background technology
Existing air-conditioned refrigerant circulation returns to be made up of compressor, reversal valve, indoor heat exchanger, outdoor heat exchanger and the reversal valve connected that finish up, and realizes the refrigeration of air-conditioning and heats.
Existing technical scheme does not have supercooling apparatus, and the refrigerant entering outdoor heat exchanger directly carries out heat exchange with the external world.When frosting situation appears in outdoor heat exchanger, heat transfer effect is deteriorated, and frosting can increase gradually, and heat exchanger thermal resistance strengthens, and cause exchange capability of heat to decline, refrigerant directly gets back to compressor after cannot drawing enough heats, and compressor efficiency is not high.
Summary of the invention
Technical problem to be solved by this invention is for the deficiencies in the prior art, provides a kind of air-conditioning tonifying Qi to increase enthalpy method, system and air-conditioning.The present invention can slow down outdoor heat exchanger frosting velocity, and frosting situation even can be avoided to occur, ensures that the exchange capability of heat of outdoor heat exchanger can more be made full use of, and contributes to the degree of superheat that lifting refrigerant exports at outdoor heat exchanger; The compressor return air side refrigerant degree of superheat and enthalpy get a promotion simultaneously, thus improve compressor operating efficiency.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of air-conditioning tonifying Qi increases enthalpy system, comprises the refrigerant circulation circuit that compressor, reversal valve, outdoor heat exchanger and indoor heat exchanger are formed, primary flow path between described outdoor heat exchanger and indoor heat exchanger is connected with vaporising device, primary flow path between described outdoor heat exchanger and indoor heat exchanger draws a secondary flow road, heat exchange is carried out through vaporising device and primary flow path in described secondary flow road, and then be connected to compressor, the porch of described secondary flow road vaporising device is fixed with throttling arrangement, described outdoor heat exchanger exit is fixed with the first temperature sensing device, the second temperature sensing device is fixed with in the exit of described secondary flow road vaporising device, described compressor return air pipe is fixed with pressure responsive device, described first temperature sensing device, second temperature sensing device is connected with controller with pressure responsive device, described controller is connected with throttling arrangement,
Described first temperature sensing device is for detecting described outdoor heat exchanger outlet temperature Ta, described second temperature sensing device is for detecting vaporising device outlet temperature Ts, described pressure responsive device is for detecting muffler pressure P e, described controller is used for calculating vaporising device secondary flow way outlet degree of superheat Tsh according to vaporising device outlet temperature Ts and muffler pressure P e, regulates the aperture of throttling arrangement according to outdoor heat exchanger outlet temperature Ta and vaporising device secondary flow way outlet degree of superheat Tsh.
The invention has the beneficial effects as follows: one aspect of the present invention is when frosting appears in outdoor heat exchanger, the coolant quantity entering outdoor heat exchanger can be reduced, reduce outdoor heat exchanger frosting velocity, frosting situation is even avoided to occur, ensure that the exchange capability of heat of outdoor heat exchanger can more be made full use of, promote the degree of superheat that refrigerant exports at outdoor heat exchanger, the compressor return air side refrigerant degree of superheat and enthalpy get a promotion on the other hand, thus improve compressor operating efficiency.
On the basis of technique scheme, the present invention can also do following improvement.
Further, described controller calculates being implemented as of vaporising device secondary flow way outlet degree of superheat Tsh: draw corresponding saturation temperature Tsat according to muffler pressure P e through tabling look-up, and the difference calculating vaporising device secondary flow way outlet temperature Ts and saturation temperature Tsat obtains evaporation secondary flow way outlet degree of superheat Tsh.
Further, described controller comprises being implemented as of the aperture of throttling arrangement control module adjustment throttling arrangement (5):
Step a, compressor start also runs the △ t1 time;
Step b, continues sensing chamber external heat exchanger (3) outlet temperature Ta, gets Fixed Time Interval △ ta, and before note △ ta, outdoor heat exchanger (3) outlet temperature is that after Ta1, △ ta, outdoor heat exchanger (3) outlet temperature is Ta2;
Step c, judges whether satisfied following condition, and Ta1 < 0 DEG C and Ta2 < Ta1 duration reach △ t2;
Steps d, if the condition meeting in step c, then judges the relation of Tsh and the first preset temperature T1 and the second preset temperature T2, if T1 >=Tsh >=T2, then control throttling arrangement aperture constant, and return step c, if Tsh>T1, then increase throttling arrangement aperture △ P, and return step c, if Tsh<T2, then reduce throttling arrangement aperture △ P, and return step c, wherein T2<T1;
Step e, if the condition not meeting in step c, then reduces throttling arrangement aperture △ P, returns step c.
Further, described outdoor heat exchanger is more than one or one, and described indoor heat exchanger is more than one or one; When described indoor heat exchanger is multiple stage, indoor heat exchanger is all opened and is heated, or part unlatching heats, and part is standby.
Further, described reversal valve adopts cross valve, and described throttling arrangement adopts electric expansion valve, described vaporising device adopts plate type heat exchanger, described first temperature sensing device adopts temperature sensor, and described second temperature sensing device adopts temperature sensor, and described pressure responsive device adopts pressure sensor.
Further, the primary flow path entrance of leading point at described vaporising device on described secondary flow road or the primary flow path at described vaporising device export.
Further, primary flow path between described outdoor heat exchanger and indoor heat exchanger draws a secondary flow road, described secondary flow road is connected to compressor without vaporising device, but with the device heat exchange of temperature in air-conditioning higher than secondary flow road refrigerant temperature after throttling arrangement, and then be connected to compressor.
A kind of air-conditioning tonifying Qi increases enthalpy method, comprises the steps:
Step S1, utilizes the first temperature sensing device to detect described outdoor heat exchanger outlet temperature Ta, and described second temperature sensing device detects vaporising device outlet temperature Ts, utilizes pressure responsive device to detect muffler pressure P e;
Step S2, controller calculates vaporising device secondary flow way outlet degree of superheat Tsh according to vaporising device outlet temperature Ts and muffler pressure P e, regulates the aperture of throttling arrangement according to outdoor heat exchanger outlet temperature Ta and vaporising device secondary flow way outlet degree of superheat Tsh.
On the basis of technique scheme, the present invention can also do following improvement.
Further, controller described in step S2 comprises being implemented as of the aperture of throttling arrangement control module adjustment throttling arrangement (5):
Step 21, compressor start also runs the △ t1 time;
Step 22, continues sensing chamber external heat exchanger (3) outlet temperature Ta, gets Fixed Time Interval △ ta, and before note △ ta, outdoor heat exchanger (3) outlet temperature is that after Ta1, △ ta, outdoor heat exchanger (3) outlet temperature is Ta2;
Step 23, judges whether satisfied following condition, and Ta1 < 0 DEG C and Ta2 < Ta1 duration reach △ t2;
Step 24, if the condition meeting in step 23, then judges the relation of Tsh and the first preset temperature T1 and the second preset temperature T2, if T1 >=Tsh >=T2, then control throttling arrangement aperture constant, and return step 23, if Tsh>T1, then increase throttling arrangement aperture △ P, and return step 23, if Tsh<T2, then reduce throttling arrangement aperture △ P, and return step 23, wherein T2<T1;
Step 25, if the condition not meeting in step 23, then reduces throttling arrangement aperture △ P, returns step 23.
A kind of air-conditioning, the air-conditioning tonifying Qi comprised described in above-mentioned any one technical scheme increases enthalpy system.
Accompanying drawing explanation
Fig. 1 is the structural representation of tonifying Qi increasing enthalpy system described in the embodiment of the present invention 1;
Fig. 2 is the automatically controlled schematic diagram of tonifying Qi increasing enthalpy system described in the embodiment of the present invention 1;
Fig. 3 is the structural representation of tonifying Qi increasing enthalpy system described in the embodiment of the present invention 2;
Fig. 4 is the increasing of tonifying Qi described in the real-time example 3 of the present invention enthalpy method flow diagram;
Fig. 5 is concrete control method flow chart in the real-time example 3 of the present invention.
Detailed description of the invention
Be described principle of the present invention and feature below in conjunction with accompanying drawing, example, only for explaining the present invention, is not intended to limit scope of the present invention.
Embodiment 1, as shown in Figure 1, 2, a kind of air-conditioning tonifying Qi increases enthalpy system, comprises the refrigerant circulation circuit that compressor 1, reversal valve 2, outdoor heat exchanger 3 and indoor heat exchanger 7 are formed, primary flow path between described outdoor heat exchanger 3 and indoor heat exchanger 7 is connected with vaporising device 4, primary flow path 61 between described outdoor heat exchanger 3 and indoor heat exchanger 7 draws a secondary flow road 62, heat exchange is carried out through vaporising device 4 and primary flow path 61 in described secondary flow road 62, and then be connected to compressor 1, the porch of described secondary flow road vaporising device is fixed with throttling arrangement 5, described outdoor heat exchanger 3 exit is fixed with the first temperature sensing device 81, the second temperature sensing device 82 is fixed with in the exit of described secondary flow road vaporising device 4, described compressor return air pipe is fixed with pressure responsive device 83, described first temperature sensing device 81, second temperature sensing device 82 is connected with controller 13 with pressure responsive device 83, described controller 13 is connected with throttling arrangement 5, described first temperature sensing device 81 is for detecting described outdoor heat exchanger 3 outlet temperature Ta, described second temperature sensing device 82 is for detecting vaporising device 4 outlet temperature Ts, described pressure responsive device 83 is for detecting muffler pressure P e, described controller 13, for calculating vaporising device secondary flow way outlet degree of superheat Tsh according to vaporising device 4 outlet temperature Ts and muffler pressure P e, regulates the aperture of throttling arrangement 5 according to outdoor heat exchanger 3 outlet temperature Ta and vaporising device secondary flow way outlet degree of superheat Tsh.
In the present embodiment, described reversal valve 2 adopts cross valve, described throttling arrangement 5 adopts electric expansion valve, described vaporising device 4 adopts plate type heat exchanger, described first temperature sensing device 81 adopts temperature sensor, described second temperature sensing device 82 adopts temperature sensor, and described pressure responsive device 83 adopts pressure sensor.
When running heating mode, after refrigerant is compressed by compressor 1, through compressor exhaust pipe 11 and cross valve 2, arriving indoor set 7 from tracheae 9 and carrying out condensation heat release, then by primary flow path 61 flowed into chamber external heat exchanger 3.By entering secondary flow road 62 from primary flow path 61 extension refrigerant, after electric expansion valve 5 reducing pressure by regulating flow, enter plate type heat exchanger 4, evaporate absorb the heat of refrigerant in primary flow path 61 in plate type heat exchanger 4 after, then compressor 1 is got back to through compressor return air pipe 12, in primary flow path 61 refrigerant by the cooling of the refrigerant on secondary flow road 62 laggard enter outdoor heat exchanger 3 absorb extraneous heat, then get back to compressor 1 through cross valve 2 through compressor muffler 12.Export at outdoor heat exchanger 3 and plate type heat exchanger 4 secondary flow way outlet is respectively equipped with the first temperature sensor 81 and the second temperature sensor 82, and be provided with pressure sensor 83 on compressor return air pipe 12.
Described controller 13 calculates being implemented as of vaporising device secondary flow way outlet degree of superheat Tsh: draw corresponding saturation temperature Tsat according to muffler pressure P e through tabling look-up, and the difference calculating vaporising device secondary flow way outlet temperature Ts and saturation temperature Tsat obtains evaporation secondary flow way outlet degree of superheat Tsh.
Described controller 13 comprises throttling arrangement control module and regulates being implemented as of the aperture of throttling arrangement (5):
Step a, compressor start also runs the △ t1 time;
Step b, continues sensing chamber external heat exchanger (3) outlet temperature Ta, gets Fixed Time Interval △ ta, and before note △ ta, outdoor heat exchanger (3) outlet temperature is that after Ta1, △ ta, outdoor heat exchanger (3) outlet temperature is Ta2;
Step c, judges whether satisfied following condition, and Ta1 < 0 DEG C and Ta2 < Ta1 duration reach △ t2;
Steps d, if the condition meeting in step c, then judges the relation of Tsh and the first preset temperature T1 and the second preset temperature T2, if T1 >=Tsh >=T2, then control throttling arrangement aperture constant, and return step c, if Tsh>T1, then increase throttling arrangement aperture △ P, and return step c, if Tsh<T2, then reduce throttling arrangement aperture △ P, and return step c, wherein T2<T1;
Step e, if the condition not meeting in step c, then reduces throttling arrangement aperture △ P, returns step c.
The primary flow path entrance of leading point at described vaporising device 4 on described secondary flow road 62 or the primary flow path at described vaporising device 4 export.
On the secondary flow road that primary flow path 61 is drawn except heat exchange can be carried out through vaporising device 4 and primary flow path 61, and then be connected to compressor 1, can also with the device heat exchange of temperature in air-conditioning higher than secondary flow road refrigerant temperature after throttling arrangement 5, and then be connected to compressor 1.In the present embodiment, on the secondary flow road that primary flow path is drawn by carrying out heat exchange through vaporising device 4 and primary flow path 61, and then be connected to compressor 1.
Embodiment 2, as shown in Figure 3, on the basis of embodiment 1, increase an indoor heat exchanger 7, be respectively the first indoor heat exchanger, 71 and second indoor heat exchanger 72, the quantity of described indoor heat exchanger also can be greater than two, described indoor heat exchanger all can open refrigeration, and partly can also open refrigeration, part is standby.
Embodiment 3, as shown in Figure 4, a kind of air-conditioning tonifying Qi increases enthalpy method, comprises the steps:
Step S1, utilize the first temperature sensing device 81 to detect described outdoor heat exchanger 3 outlet temperature Ta, described second temperature sensing device 82 detects vaporising device 4 outlet temperature Ts, utilizes pressure responsive device 83 to detect muffler pressure P e;
Step S2, controller 13 calculates vaporising device secondary flow way outlet degree of superheat Tsh according to vaporising device 4 outlet temperature Ts and muffler pressure P e, regulates the aperture of throttling arrangement (5) according to outdoor heat exchanger 3 outlet temperature Ta and vaporising device secondary flow way outlet degree of superheat Tsh.
As shown in Figure 5, controller 13 described in step S2 comprises being implemented as of the aperture of throttling arrangement control module adjustment throttling arrangement 5:
Step 21, compressor start also runs the △ t1 time;
Step 22, continues sensing chamber external heat exchanger (3) outlet temperature Ta, gets Fixed Time Interval △ ta, and before note △ ta, outdoor heat exchanger (3) outlet temperature is that after Ta1, △ ta, outdoor heat exchanger (3) outlet temperature is Ta2;
Step 23, judges whether satisfied following condition, and Ta1 < 0 DEG C and Ta2 < Ta1 duration reach △ t2;
Step 24, if the condition meeting in step 23, then judges the relation of Tsh and the first preset temperature T1 and the second preset temperature T2, if T1 >=Tsh >=T2, then control throttling arrangement aperture constant, and return step 23, if Tsh>T1, then increase throttling arrangement aperture △ P, and return step 23, if Tsh<T2, then reduce throttling arrangement aperture △ P, and return step 23, wherein T2<T1;
Step 25, if the condition not meeting in step 23, then reduces throttling arrangement aperture △ P, returns step 23.
A kind of air-conditioning, comprises above-described embodiment 1 or the air-conditioning tonifying Qi described in embodiment 2 increases enthalpy system, and other existing parts repeat no more.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. air-conditioning tonifying Qi increases an enthalpy system, it is characterized in that, comprises the refrigerant circulation circuit that compressor (1), reversal valve (2), outdoor heat exchanger (3) and indoor heat exchanger (7) are formed, primary flow path between described outdoor heat exchanger (3) and indoor heat exchanger (7) is connected with vaporising device (4), the upper extraction secondary flow road (62) of primary flow path (61) between described outdoor heat exchanger (3) and indoor heat exchanger (7), described secondary flow road (62) carries out heat exchange through vaporising device (4) and primary flow path (61), and then be connected to compressor (1), the porch of described secondary flow road vaporising device is fixed with throttling arrangement (5), described outdoor heat exchanger (3) exit is fixed with the first temperature sensing device (81), the second temperature sensing device (82) is fixed with in the exit of described secondary flow road vaporising device (4), described compressor return air pipe is fixed with pressure responsive device (83), described first temperature sensing device (81), second temperature sensing device (82) is connected with controller (13) with pressure responsive device (83), described controller (13) is connected with throttling arrangement (5),
Described first temperature sensing device (81) is for detecting described outdoor heat exchanger (3) outlet temperature Ta, described second temperature sensing device (82) is for detecting vaporising device (4) outlet temperature Ts, described pressure responsive device (83) is for detecting muffler pressure P e, described controller (13), for calculating vaporising device secondary flow way outlet degree of superheat Tsh according to vaporising device (4) outlet temperature Ts and muffler pressure P e, regulates the aperture of throttling arrangement (5) according to outdoor heat exchanger (3) outlet temperature Ta and vaporising device secondary flow way outlet degree of superheat Tsh.
2. a kind of air-conditioning tonifying Qi increases enthalpy system according to claim 1, it is characterized in that, described controller (13) calculates being implemented as of vaporising device secondary flow way outlet degree of superheat Tsh: draw corresponding saturation temperature Tsat according to muffler pressure P e through tabling look-up, and the difference calculating vaporising device secondary flow way outlet temperature Ts and saturation temperature Tsat obtains evaporation secondary flow way outlet degree of superheat Tsh.
3. a kind of air-conditioning tonifying Qi increases enthalpy system according to claim 1, it is characterized in that, described controller (13) comprises throttling arrangement control module and regulates being implemented as of the aperture of throttling arrangement (5):
Step a, compressor start also runs the △ t1 time;
Step b, continues sensing chamber external heat exchanger (3) outlet temperature Ta, gets Fixed Time Interval △ ta, and before note △ ta, outdoor heat exchanger (3) outlet temperature is that after Ta1, △ ta, outdoor heat exchanger (3) outlet temperature is Ta2;
Step c, judges whether satisfied following condition, and Ta1 < 0 DEG C and Ta2 < Ta1 duration reach △ t2;
Steps d, if the condition meeting in step c, then judges the relation of Tsh and the first preset temperature T1 and the second preset temperature T2, if T1 >=Tsh >=T2, then control throttling arrangement aperture constant, and return step c, if Tsh>T1, then increase throttling arrangement aperture △ P, and return step c, if Tsh<T2, then reduce throttling arrangement aperture △ P, and return step c, wherein T2<T1;
Step e, if the condition not meeting in step c, then reduces throttling arrangement aperture △ P, returns step c.
4. a kind of air-conditioning tonifying Qi increases enthalpy system according to claim 1, and it is characterized in that, described outdoor heat exchanger (3) is more than one or one, and described indoor heat exchanger (7) is more than one or one; When described indoor heat exchanger (7) is for multiple stage, indoor heat exchanger (7) is all opened and is heated, or part unlatching heats, and part is standby.
5. according to claim 1-4, a kind of air-conditioning tonifying Qi increases enthalpy system, it is characterized in that, described reversal valve (2) adopts cross valve, described throttling arrangement (5) adopts electric expansion valve, described vaporising device (4) adopts plate type heat exchanger, described first temperature sensing device (81) adopts temperature sensor, and described second temperature sensing device (82) adopts temperature sensor, and described pressure responsive device (83) adopts pressure sensor.
6. a kind of air-conditioning tonifying Qi increases enthalpy system according to claim 5, it is characterized in that, the primary flow path entrance of leading point at described vaporising device (4) of described secondary flow road (62) or the primary flow path at described vaporising device (4) export.
7. a kind of air-conditioning tonifying Qi increases enthalpy system according to claim 6, it is characterized in that, primary flow path between described outdoor heat exchanger (3) and indoor heat exchanger (7) draws a secondary flow road (62), described secondary flow road (62) is connected to compressor (1) without vaporising device (4), but with the device heat exchange of temperature in air-conditioning higher than secondary flow road refrigerant temperature after throttling arrangement (5), and then be connected to compressor (1).
8. utilize air-conditioning tonifying Qi according to any one of right 1-7 to increase enthalpy system and realize the method that tonifying Qi increases enthalpy, it is characterized in that, comprise the steps:
Step S1, the first temperature sensing device (81) is utilized to detect described outdoor heat exchanger (3) outlet temperature Ta, described second temperature sensing device (82) detects vaporising device (4) outlet temperature Ts, utilizes pressure responsive device (83) to detect muffler pressure P e;
Step S2, controller (13) calculates vaporising device secondary flow way outlet degree of superheat Tsh according to vaporising device (4) outlet temperature Ts and muffler pressure P e, regulates the aperture of throttling arrangement (5) according to outdoor heat exchanger (3) outlet temperature Ta and vaporising device secondary flow way outlet degree of superheat Tsh.
9. a kind of air-conditioning tonifying Qi increases enthalpy method according to claim 8, it is characterized in that, controller described in step S2 (13) comprises throttling arrangement control module and regulates being implemented as of the aperture of throttling arrangement (5):
Step 21, compressor start also runs the △ t1 time;
Step 22, continues sensing chamber external heat exchanger (3) outlet temperature Ta, gets Fixed Time Interval △ ta, and before note △ ta, outdoor heat exchanger (3) outlet temperature is that after Ta1, △ ta, outdoor heat exchanger (3) outlet temperature is Ta2;
Step 23, judges whether satisfied following condition, and Ta1 < 0 DEG C and Ta2 < Ta1 duration reach △ t2;
Step 24, if the condition meeting in step 23, then judges the relation of Tsh and the first preset temperature T1 and the second preset temperature T2, if T1 >=Tsh >=T2, then control throttling arrangement aperture constant, and return step 23, if Tsh>T1, then increase throttling arrangement aperture △ P, and return step 23, if Tsh<T2, then reduce throttling arrangement aperture △ P, and return step 23, wherein T2<T1;
Step 25, if the condition not meeting in step 23, then reduces throttling arrangement aperture △ P, returns step 23.
10. an air-conditioning, is characterized in that, the air-conditioning tonifying Qi comprised according to any one of claim 1-7 increases enthalpy system.
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