CN103175355B - Air conditioner and exhaust temperature control method applied to air conditioner - Google Patents
Air conditioner and exhaust temperature control method applied to air conditioner Download PDFInfo
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- CN103175355B CN103175355B CN201110440786.5A CN201110440786A CN103175355B CN 103175355 B CN103175355 B CN 103175355B CN 201110440786 A CN201110440786 A CN 201110440786A CN 103175355 B CN103175355 B CN 103175355B
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000003507 refrigerant Substances 0.000 claims abstract description 20
- 230000001276 controlling effect Effects 0.000 claims description 47
- 238000001514 detection method Methods 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 description 5
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
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Abstract
The invention discloses an air conditioner and a control method for exhaust temperature applied to the air conditioner. The air conditioner includes: the temperature control system comprises a compressor, a first heat exchanger, a second heat exchanger, a first electronic expansion valve and a temperature control unit, wherein the input end of the first heat exchanger is connected with the exhaust end of the compressor, the first electronic expansion valve is connected between the input end of the second heat exchanger and the output end of the first heat exchanger, the output end of the second heat exchanger is connected with the suction end of the compressor, the temperature control unit is connected between a first node and the compressor and used for controlling the temperature of a refrigerant at the exhaust end of the compressor, and the first node is a node between the first heat exchanger and the first electronic expansion valve. The invention solves the problem that the exhaust temperature of the compressor of the air conditioner is difficult to control in the prior art, thereby achieving the effect of simply and conveniently controlling the exhaust temperature of the compressor of the air conditioner.
Description
Technical field
The present invention relates to a kind of air-conditioner and be applied to the control method of delivery temperature of air-conditioner.
Background technology
At present, for air-conditioner, in order to ensure compressor operating reliability, the delivery temperature of big city to compressor limits.
Wherein relatively more conventional a kind of mode controls main refrigerant circuit amount, and namely when compressor exhaust temperature is higher than limit value, by reducing suction superheat, and then the coolant quantity increasing back compressor reduces delivery temperature.This method is simple, and is easy to operation, but can bring the decline of systematic function on the one hand, can cause the hidden danger of liquid hammer on the other hand to compressor.
Another kind method is a road in parallel with major loop condensation side, adopts heating power expansion valve directly to carry out hydrojet to suction side or intermediate cavity, reaches the object reducing motor or temperature of rotor, and then reduce delivery temperature.This kind of method effectively can carry out control delivery temperature and motor temperature, but because heating power expansion valve degree of superheat adjustable range is generally smaller, limit by heating power expansion valve range of choice in addition, system there will be unstable situation, namely hydrojet is frequent, or under different operating mode, delivery temperature cannot reach control point requirement.
For the unmanageable problem of the compressor exhaust temperature of air-conditioner in correlation technique, at present effective solution is not yet proposed.
Summary of the invention
Main purpose of the present invention is the control method of the delivery temperature providing a kind of air-conditioner and be applied to air-conditioner, to solve the unmanageable problem of the compressor exhaust temperature of air-conditioner in prior art.
To achieve these goals, according to an aspect of the present invention, provide a kind of air-conditioner, comprise compressor, First Heat Exchanger, first electric expansion valve, second heat exchanger and thermostat unit, wherein, the input of First Heat Exchanger is connected with the exhaust end of compressor, between the input that first electric expansion valve is connected to the second heat exchanger and the output of First Heat Exchanger, the output of the second heat exchanger is connected with the suction end of compressor, thermostat unit is connected between first node and compressor, for regulating the refrigerant temperature of the exhaust end of compressor, wherein, first node is the node between First Heat Exchanger and the first electric expansion valve.
Further, thermostat unit comprises: magnetic valve, is connected with first node; And second electric expansion valve, be connected between magnetic valve and compressor air suction end.
Further, air-conditioner also comprises: exhaust temperature-sensitive bag, is arranged on the exhaust end of compressor, for detecting the delivery temperature of compressor; And controller, comprise first input end, the second input, the first output and the second output, wherein, first input end is connected with exhaust temperature-sensitive bag, second input is connected with the motor of compressor, first output is connected with the second electric expansion valve with magnetic valve respectively with the second output, when by the second input, controller detects that compressor is opened, controller is according to the unlatching of delivery temperature Controlling solenoid valve or cut out, and control the second electric expansion valve carries out aperture adjustment.
Further, above-mentioned air-conditioner also comprises: cross valve, comprise inlet end and the first outlet side, the second outlet side and the 3rd outlet side, wherein, described inlet end is connected with described compressor air-discharging end, described first outlet side is connected to described 3rd outlet side via First Heat Exchanger, the first electric expansion valve and the second heat exchanger, and described second outlet side is connected to the suction end of described compressor; Device for drying and filtering, is connected between heat exchanger and the first electric expansion valve, and wherein, first node is the node between First Heat Exchanger and device for drying and filtering, or first node is the node between the first electric expansion valve and device for drying and filtering; Gas-liquid separator, is connected between the second outlet side and the suction end of compressor.
Further, the First Heat Exchanger of above-mentioned air-conditioner is finned heat exchanger, and the second heat exchanger is dry type shell and tube exchanger.
To achieve these goals, according to another aspect of the present invention, provide a kind of control method of delivery temperature, this control method is applied to any one air-conditioner that foregoing of the present invention provides, and comprising: judge whether the compressor of air-conditioner is opened; When judging that the compressor of air-conditioner is opened, detect the delivery temperature of the compressor of air-conditioner; Judge whether delivery temperature is more than or equal to the first preset temperature; And when judging that delivery temperature is more than or equal to the first preset temperature, the thermostat unit controlling air-conditioner regulates the refrigerant temperature of the exhaust end of compressor.
Further, the thermostat unit of air-conditioner comprises magnetic valve, after judging whether delivery temperature is more than or equal to the first preset temperature, above-mentioned control method also comprises: when judging that delivery temperature is less than the first preset temperature, judge the magnitude relationship of delivery temperature and the second preset temperature; If delivery temperature is greater than the second preset temperature, and be less than the first preset temperature, then the magnetic valve controlling air-conditioner keeps current state; And if delivery temperature is less than or equal to the second preset temperature, then control the closed electromagnetic valve of air-conditioner.
Further, the thermostat unit of air-conditioner comprises magnetic valve and the second electric expansion valve, when judging that delivery temperature is more than or equal to the first preset temperature, the thermostat unit controlling air-conditioner regulates the refrigerant temperature of the exhaust end of compressor to comprise: the magnetic valve controlling described air-conditioner is opened; The delivery temperature of repeated detection compressor in the first Preset Time, and calculate target deviation and target deviation mean value, wherein, target deviation equals corresponding delivery temperature and deducts the 3rd preset temperature, 3rd preset temperature is less than the first preset temperature, and the time interval of repeated detection is the second Preset Time; Judge the size of target deviation mean value and zero; When judging that target deviation mean value is greater than zero, judge the size of target deviation mean value and the 4th preset temperature and/or the 5th preset temperature, wherein, the 5th preset temperature is less than the second preset temperature; If target deviation mean value is less than or equal to the 4th preset temperature, then the second electric expansion valve controlling air-conditioner increases the first aperture; If target deviation mean value is greater than the 4th preset temperature, and be less than or equal to the 5th preset temperature, then the second electric expansion valve controlling air-conditioner increases the second aperture; And if target deviation mean value is greater than the 5th preset temperature, the second electric expansion valve then controlling air-conditioner increases the 3rd aperture, wherein, the numerical values recited of the first aperture equals the first preset value and is multiplied by target deviation mean value, the numerical values recited of the second aperture equals the second preset value, the numerical values recited of the 3rd aperture equals the first preset value and is multiplied by the first integer, and the first integer is the integer obtained after target deviation mean value deducts the 5th preset temperature.
Further, the thermostat unit of air-conditioner comprises magnetic valve and the second electric expansion valve, when judging that delivery temperature is more than or equal to the first preset temperature, the thermostat unit controlling air-conditioner regulates the refrigerant temperature of the exhaust end of compressor to comprise: the magnetic valve controlling described air-conditioner is opened; The delivery temperature of repeated detection compressor in the first Preset Time, and calculate target deviation and target deviation mean value, wherein, target deviation equals corresponding delivery temperature and deducts the 3rd preset temperature, 3rd preset temperature is less than the first preset temperature, and the time interval of repeated detection is the second Preset Time; When judging that target deviation mean value is less than zero, judge the size of target deviation mean value and the 4th preset temperature and/or the 5th preset temperature, wherein, the 5th preset temperature is less than the second preset temperature; If target deviation mean value is less than or equal to the 4th preset temperature, then the second electric expansion valve controlling air-conditioner reduces the first aperture; If target deviation mean value is greater than the 4th preset temperature, and be less than or equal to the 5th preset temperature, then the second electric expansion valve controlling air-conditioner reduces the second aperture; And if target deviation mean value is greater than the 5th preset temperature, the second electric expansion valve then controlling air-conditioner reduces the 3rd aperture, wherein, the numerical values recited of the first aperture equals the first preset value and is multiplied by target deviation mean value, the numerical values recited of the second aperture equals the second preset value, the numerical values recited of the 3rd aperture equals the first preset value and is multiplied by the first integer, and the first integer is the integer obtained after target deviation mean value deducts the 5th preset temperature.
Further, after the second electric expansion valve controlling air-conditioner carries out aperture adjustment, control method also comprises: judge whether the first aperture or the 3rd aperture are greater than default aperture; And when judgement first aperture or the 3rd aperture are greater than default aperture, control the second electric expansion valve and increase or less default aperture.
Pass through the present invention, adopt the air-conditioner comprising following structure: compressor, First Heat Exchanger, first electric expansion valve, second heat exchanger and thermostat unit, wherein, the input of First Heat Exchanger is connected with the exhaust end of compressor, between the input that first electric expansion valve is connected to the second heat exchanger and the output of First Heat Exchanger, the output of the second heat exchanger is connected with the suction end of compressor, thermostat unit is connected between first node and compressor, for regulating the refrigerant temperature of the exhaust end of compressor, wherein, first node is the node between First Heat Exchanger and the first electric expansion valve.Adjustment refrigerant temperature is carried out by set temperature regulon between first node and compressor, achieve the delivery temperature reducing compressor, solve the unmanageable problem of the compressor exhaust temperature of air-conditioner in prior art, and then reach the effect of the compressor exhaust temperature controlling air-conditioner simply and easily.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of the air-conditioner according to the embodiment of the present invention;
Fig. 2 is the concrete structure figure of the air-conditioner according to the embodiment of the present invention; And
Fig. 3 is the control method flow chart according to the embodiment of the present invention.
Detailed description of the invention
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
Fig. 1 is the schematic diagram of the air-conditioner according to the embodiment of the present invention, and as shown in Figure 1, the air-conditioner in this embodiment comprises: compressor, First Heat Exchanger, the first electric expansion valve 1, second heat exchanger and thermostat unit.Particularly, the input of First Heat Exchanger is connected with the exhaust end of compressor, between the input that first electric expansion valve is connected to the second heat exchanger and the output of First Heat Exchanger, the output of the second heat exchanger is connected with the suction end of compressor, thermostat unit is connected between first node and compressor, for regulating the refrigerant temperature of the exhaust end of compressor, wherein, first node is the node between First Heat Exchanger and the first electric expansion valve.
Above-mentioned air-conditioner also comprises: exhaust temperature-sensitive bag (not shown), is arranged on the exhaust end of compressor, for detecting the delivery temperature of compressor; And controller (not shown), comprise first input end, the second input and the first output, wherein, first input end is connected with exhaust temperature-sensitive bag, second input is connected with the motor of compressor, first output is connected with thermostat unit, and when by the second input, controller detects that compressor is opened, controller regulates the refrigerant temperature of compressor according to delivery temperature control temperature regulon.
When detecting that compressor is opened, the temperature of exhaust outlet of compressor is detected by exhaust temperature-sensitive bag, and then carry out by controller control temperature regulon the refrigerant temperature regulating compressor, solve the unmanageable problem of the compressor exhaust temperature of air-conditioner in prior art, and then reach the effect of the compressor exhaust temperature controlling air-conditioner simply and easily.
Fig. 2 is the concrete structure figure of the air-conditioner according to the embodiment of the present invention, and as shown in Figure 2, the air-conditioner in this embodiment comprises: compressor; Cross valve (comprising inlet end D and the first outlet side C, the second outlet side S and the 3rd outlet side E); First Heat Exchanger (such as, finned heat exchanger); First electric expansion valve 1; Thermostat unit (comprising the second electric expansion valve 2 and magnetic valve 3); Gas-liquid separator 4; Second heat exchanger (such as: dry type shell 5); Device for drying and filtering 6; First check valve 7; Second check valve 8; 3rd check valve 9 and the 4th check valve 10.When filled arrows shown in figure is air-conditioner running refrigerating, the flow direction of refrigerant; Hollow arrow shown in figure is that air-conditioner runs when heating, the flow direction of refrigerant.
Wherein, the inlet end D of cross valve is connected with compressor air-discharging end, and the first outlet side C is connected to the 3rd outlet side E via First Heat Exchanger, the first electric expansion valve 1 and the second heat exchanger, and the second outlet side S is connected to the suction end of compressor.Second electric expansion valve 2, is connected between magnetic valve 3 and compressor air suction end.Magnetic valve 3, is connected with first node, and wherein, first node is the node between First Heat Exchanger and the first electric expansion valve 1.Device for drying and filtering 6, be connected between heat exchanger and the first electric expansion valve 1, wherein, first node is the node (not shown) between heat exchanger and device for drying and filtering 6, or first node is the node between the first electric expansion valve 1 and device for drying and filtering 6.Gas-liquid separator 4, is connected between the second outlet side S and the suction end of compressor.Dry type package 5, is connected between the first electric expansion valve 1 and the 3rd outlet side E.
Above-mentioned air-conditioner also comprises: exhaust temperature-sensitive bag, is arranged on the exhaust end of compressor, for detecting the delivery temperature of compressor; And controller, comprise first input end, the second input, the first output and the second output, wherein, first input end is connected with exhaust temperature-sensitive bag, second input is connected with the motor of compressor, first output is connected with the second electric expansion valve with magnetic valve respectively with the second output, when by the second input, controller detects that compressor is opened, controller is according to the unlatching of delivery temperature Controlling solenoid valve 3 or cut out, and control the second electric expansion valve 2 carries out aperture adjustment.
By a road thermostat unit in parallel with major loop condensation side, this thermostat unit utilizes electric expansion valve 2 to regulate the refrigerant temperature of compressor air suction end, reaches refrigerant temperature by reducing compressor air suction end to regulate the effect of the delivery temperature of compressor.Further, electric expansion valve heating power expansion valve more of the prior art, the former adjustable range is large, is conveniently applicable to different working conditions.
Fig. 3 is the control method flow chart according to the embodiment of the present invention, and the control method of the embodiment of the present invention comprises step S301 to step S307:
S301: judge whether the compressor of air-conditioner is opened.
S303: when judging that the compressor of air-conditioner is opened, detect the delivery temperature of the compressor of air-conditioner.
S305: judge whether delivery temperature is more than or equal to the first preset temperature.
S307: when judging that delivery temperature is more than or equal to the first preset temperature, the thermostat unit controlling air-conditioner regulates the refrigerant temperature of the exhaust end of compressor.
Wherein, the thermostat unit of air-conditioner comprises magnetic valve, after judging whether delivery temperature is more than or equal to the first preset temperature, above-mentioned control method also comprises: when judging that delivery temperature is less than the first preset temperature, judge the magnitude relationship of delivery temperature and the second preset temperature; If delivery temperature is greater than the second preset temperature, and be less than the first preset temperature, then the magnetic valve controlling air-conditioner keeps current state; And if delivery temperature is less than or equal to the second preset temperature, then the magnetic valve 3 controlling air-conditioner cuts out.
Particularly, the thermostat unit of air-conditioner comprises magnetic valve 3 and the second electric expansion valve 2, controller feeds back the signal determining compressor unlatching of coming according to exhaust temperature-sensitive bag after, detect compressor exhaust temperature, when the delivery temperature detected is more than or equal to the first preset temperature T1, Controlling solenoid valve 3 is opened, and controls the second electric expansion valve 2 and carry out corresponding aperture adjustment.If delivery temperature is greater than the second preset temperature T2, and be less than the first preset temperature T1, then Controlling solenoid valve 3 keeps current state, if delivery temperature is less than or equal to the second preset temperature T2, then Controlling solenoid valve 3 is closed.
When judging that delivery temperature is more than or equal to the first preset temperature T1, the magnetic valve 3 controlling air-conditioner is opened, and the second electric expansion valve 2 controlling air-conditioner carry out aperture regulate comprise: the delivery temperature of repeated detection compressor in the first preset time t 1, and calculate target deviation and target deviation mean value, wherein, target deviation equals corresponding delivery temperature and deducts the 3rd preset temperature T3, and the time interval of repeated detection is the second preset time t 2; Judge the size of target deviation mean value and zero; When judging that target deviation mean value is greater than zero, judge the size of target deviation mean value and the 4th preset temperature T4 and/or the 5th preset temperature T5, wherein, the 5th preset temperature T5 is less than the second preset temperature T2; If target deviation mean value is less than or equal to the 4th preset temperature T4, then the second electric expansion valve 2 controlling air-conditioner increases the first aperture; If target deviation mean value is greater than the 4th preset temperature T4, and be less than or equal to the 5th preset temperature T5, then the second electric expansion valve 2 controlling air-conditioner increases the second aperture; And if target deviation mean value is greater than the 5th preset temperature T5, the second electric expansion valve 2 then controlling air-conditioner increases the 3rd aperture, wherein, the numerical values recited of the first aperture equals the first preset value and is multiplied by target deviation mean value, the numerical values recited of the second aperture equals the second preset value, the numerical values recited of the 3rd aperture equals the first preset value and is multiplied by the first integer, and the first integer is the integer obtained after target deviation mean value deducts the 5th preset temperature T5.
Further, when judging that delivery temperature is more than or equal to the first preset temperature T1, the delivery temperature of repeated detection compressor in the first preset time t 1, and calculate target deviation and target deviation mean value, wherein, target deviation equals corresponding delivery temperature and deducts the 3rd preset temperature T3, and the time interval of repeated detection is the second preset time t 2; When judging that target deviation mean value is less than zero, judge the size of target deviation mean value and the 4th preset temperature T4 and/or the 5th preset temperature T5, wherein, the 5th preset temperature T5 is less than the second preset temperature T2; If target deviation mean value is less than or equal to the 4th preset temperature T4, then the second electric expansion valve 2 controlling air-conditioner reduces the first aperture; If target deviation mean value is greater than the 4th preset temperature T4, and be less than or equal to the 5th preset temperature T5, then the second electric expansion valve 2 controlling air-conditioner reduces the second aperture; And if target deviation mean value is greater than the 5th preset temperature T5, the second electric expansion valve 2 then controlling air-conditioner reduces the 3rd aperture, wherein, the numerical values recited of the first aperture equals the first preset value and is multiplied by target deviation mean value, the numerical values recited of the second aperture equals the second preset value, the numerical values recited of the 3rd aperture equals the first preset value and is multiplied by the first integer, and the first integer is the integer obtained after target deviation mean value deducts the 5th preset temperature T5.
Further, after the second electric expansion valve 2 controlling air-conditioner carries out aperture adjustment, control method also comprises: judge whether the first aperture or the 3rd aperture are greater than default aperture; And when judgement first aperture or the 3rd aperture are greater than default aperture, control the second electric expansion valve 2 and increase or less default aperture.
Specifically be expressed as: target deviation=delivery temperature-T3 DEG C, if T4 < target deviation mean value≤T5, regulate aperture=A; If target deviation mean value > is T5, regulate aperture=C*[(target deviation mean value-T5)], concrete aperture round off rounds; If target deviation mean value≤T4, regulate aperture=C*[target deviation mean value], concrete aperture round off rounds.Wherein, if according to formulae discovery round obtain be on the occasion of, then electric expansion valve 2 will tune up and regulate aperture accordingly in current aperture; If rounding what obtain according to formulae discovery is negative value, then electric expansion valve 2 will be turned down and regulate aperture accordingly in current aperture.Aperture maximum is regulated to be no more than default aperture, as exceeded default aperture, then by presetting aperture adjustment.Illustrate as follows:
After compressor is opened, meet magnetic valve 3 and open, electric expansion valve 2 gets to initial opening 250, after maintaining 1min, electric expansion valve 2 according to target bias adjustment, regulated once at interval of 30 seconds, controller detects target deviation at interval of 5S, calculates the mean value of 30 seconds internal object deviations; After meeting magnetic valve 3 closedown, electric expansion valve 2 is closed.
Target deviation=delivery temperature-95 DEG C;
0 < target deviation mean value≤2, regulate aperture=0;
Target deviation mean value > 2, regulates aperture=2*[(target deviation mean value-2)], concrete aperture round off rounds;
Target deviation mean value≤0, regulates aperture=2*[target deviation mean value], concrete aperture round off rounds.
If according to formulae discovery round obtain be on the occasion of, then electric expansion valve 2 will tune up and regulate aperture accordingly in current aperture; If rounding what obtain according to formulae discovery is negative value, then electric expansion valve 2 will be turned down and regulate aperture accordingly in current aperture.Aperture maximum is regulated to be no more than 20, as more than 20, then by 20 adjustment.
For cost consideration, need the meeting in price of the electric expansion valve of a High cooling power more expensive, multiple little electric expansion valve can be adopted in parallel, or adopt Multi-path capillary and magnetic valve to combine and control (this kind of Measures compare complexity, but cost is lower), the efficient object controlling delivery temperature can be reached equally.
The control method of the delivery temperature of the air-conditioner of above-described embodiment is applicable to Air-condition system control delivery temperature, is also applicable to the target being reached control temperature by adjustment rate-of flow simultaneously.Be can be implemented in different air-conditioning system by the embodiment of the present invention and control excessive discharge temperature; prevent compressor and freeze oil carbon; improve oil lubrication efficiency, and then reach protection compressor operating reliability object, object delivery temperature being stabilized in design object value can be realized simultaneously.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.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 (9)
1. an air-conditioner, comprise compressor, First Heat Exchanger, the first electric expansion valve (1) and the second heat exchanger, the input of wherein said First Heat Exchanger is connected with the exhaust end of described compressor, between the input that described first electric expansion valve (1) is connected to described second heat exchanger and the output of described First Heat Exchanger, the output of described second heat exchanger is connected with the suction end of described compressor
It is characterized in that, also comprise:
Thermostat unit, be connected between first node and described compressor, for regulating the refrigerant temperature of the exhaust end of described compressor, wherein, described first node is the node between described First Heat Exchanger and described first electric expansion valve (1), described thermostat unit comprises: magnetic valve (3), is connected with described first node; And second electric expansion valve (2), be connected between described magnetic valve (3) and described compressor air suction end.
2. air-conditioner according to claim 1, is characterized in that, described air-conditioner also comprises:
Exhaust temperature-sensitive bag, is arranged on the exhaust end of described compressor, for detecting the delivery temperature of described compressor; And
Controller, comprise first input end, second input, first output and the second output, wherein, described first input end is connected with described exhaust temperature-sensitive bag, described second input is connected with the motor of described compressor, described first output and described second output are connected with described second electric expansion valve (2) with described magnetic valve (3) respectively, when by the second input, described controller detects that described compressor is opened, described controller controls unlatching or the cut out of described magnetic valve (3) according to described delivery temperature, and control described second electric expansion valve (2) and carry out aperture adjustment.
3. air-conditioner according to claim 1, is characterized in that, described air-conditioner also comprises:
Cross valve, comprise inlet end (D) and the first outlet side (C), the second outlet side (S) and the 3rd outlet side (E), wherein, described inlet end is connected with described compressor air-discharging end, described first outlet side (C) is connected to described 3rd outlet side (E) via First Heat Exchanger, the first electric expansion valve (1) and the second heat exchanger, and described second outlet side (S) is connected to the suction end of described compressor;
Device for drying and filtering, be connected between described heat exchanger and described first electric expansion valve (1), wherein, described first node is the node between described First Heat Exchanger and described device for drying and filtering, or described first node is the node between described first electric expansion valve (1) and described device for drying and filtering; And
Gas-liquid separator, is connected between described second outlet side (S) and the suction end of described compressor.
4. air-conditioner according to claim 1, is characterized in that, described First Heat Exchanger is finned heat exchanger, and described second heat exchanger is dry type shell and tube exchanger.
5. a control method for delivery temperature, is applied to the air-conditioner according to any one of Claims 1-4, it is characterized in that, comprising:
Judge whether the compressor of described air-conditioner is opened;
When judging that the compressor of described air-conditioner is opened, detect the delivery temperature of the compressor of described air-conditioner;
Judge whether described delivery temperature is more than or equal to the first preset temperature; And
When judging that described delivery temperature is more than or equal to the first preset temperature, the thermostat unit controlling described air-conditioner regulates the refrigerant temperature of the exhaust end of described compressor.
6. control method according to claim 5, is characterized in that, the thermostat unit of described air-conditioner comprises magnetic valve (3), and after judging whether described delivery temperature is more than or equal to the first preset temperature, described control method also comprises:
When judging that described delivery temperature is less than described first preset temperature, judge the magnitude relationship of described delivery temperature and the second preset temperature;
If described delivery temperature is greater than described second preset temperature, and be less than described first preset temperature, then the magnetic valve (3) controlling described air-conditioner keeps current state; And
If described delivery temperature is less than or equal to described second preset temperature, then the magnetic valve (3) controlling described air-conditioner cuts out.
7. control method according to claim 5, it is characterized in that, the thermostat unit of described air-conditioner comprises magnetic valve (3) and the second electric expansion valve (2), when judging that described delivery temperature is more than or equal to the first preset temperature, the thermostat unit controlling described air-conditioner regulates the refrigerant temperature of the exhaust end of described compressor to comprise:
The magnetic valve (3) controlling described air-conditioner is opened;
The delivery temperature of compressor described in repeated detection in the first Preset Time, and calculate target deviation and target deviation mean value, wherein, described target deviation equals corresponding delivery temperature and deducts the 3rd preset temperature, and the time interval of described repeated detection is the second Preset Time;
Judge the size of described target deviation mean value and zero;
When judging that described target deviation mean value is greater than zero, judge the size of described target deviation mean value and the 4th preset temperature and/or the 5th preset temperature, wherein, described 5th preset temperature is less than described second preset temperature;
If described target deviation mean value is less than or equal to described 4th preset temperature, then second electric expansion valve (2) of the described air-conditioner of described control increases the first aperture;
If described target deviation mean value is greater than described 4th preset temperature, and be less than or equal to described 5th preset temperature, then the second electric expansion valve (2) controlling described air-conditioner increases the second aperture; And
If described target deviation mean value is greater than described 5th preset temperature, the second electric expansion valve (2) then controlling described air-conditioner increases the 3rd aperture, wherein, the numerical values recited of described first aperture equals the first preset value and is multiplied by described target deviation mean value, the numerical values recited of described second aperture equals the second preset value, the numerical values recited of described 3rd aperture equals described first preset value and is multiplied by the first integer, and described first integer is the integer obtained after described target deviation mean value deducts described 5th preset temperature.
8. control method according to claim 5, it is characterized in that, the thermostat unit of described air-conditioner comprises magnetic valve (3) and the second electric expansion valve (2), when judging that described delivery temperature is more than or equal to the first preset temperature, the thermostat unit controlling described air-conditioner regulates the refrigerant temperature of the exhaust end of described compressor to comprise:
The magnetic valve (3) controlling described air-conditioner is opened;
The delivery temperature of compressor described in repeated detection in the first Preset Time, and calculate target deviation and target deviation mean value, wherein, described target deviation equals corresponding delivery temperature and deducts the 3rd preset temperature, and the time interval of described repeated detection is the second Preset Time;
When judging that described target deviation mean value is less than zero, judge the size of described target deviation mean value and the 4th preset temperature and/or the 5th preset temperature, wherein, described 5th preset temperature is less than described second preset temperature;
If described target deviation mean value is less than or equal to described 4th preset temperature, then the second electric expansion valve (2) controlling described air-conditioner reduces the first aperture;
If described target deviation mean value is greater than described 4th preset temperature, and be less than or equal to described 5th preset temperature, then the second electric expansion valve (2) controlling described air-conditioner reduces the second aperture; And
If described target deviation mean value is greater than described 5th preset temperature, the second electric expansion valve (2) then controlling described air-conditioner reduces the 3rd aperture, wherein, the numerical values recited of described first aperture equals the first preset value and is multiplied by described target deviation mean value, the numerical values recited of described second aperture equals the second preset value, the numerical values recited of described 3rd aperture equals described first preset value and is multiplied by the first integer, and described first integer is the integer obtained after described target deviation mean value deducts described 5th preset temperature.
9. the control method according to claim 7 or 8, is characterized in that, after the second electric expansion valve (2) controlling described air-conditioner carries out aperture adjustment, described control method also comprises:
Judge whether described first aperture or described 3rd aperture are greater than default aperture; And
When judging that described first aperture or described 3rd aperture are greater than described default aperture, controlling described second electric expansion valve (2) and increase or reduce described default aperture.
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| CN103884140B (en) * | 2014-02-21 | 2016-04-20 | 海信（山东）空调有限公司 | The control method of the refrigeration compressor ventilating degree of superheat and system |
| CN112050432A (en) * | 2019-06-05 | 2020-12-08 | 青岛海尔空调器有限总公司 | Control method and device for fixed-frequency air conditioner and fixed-frequency air conditioner |
| CN112781233A (en) * | 2020-03-05 | 2021-05-11 | 青岛海尔新能源电器有限公司 | Control method and system for space energy heat pump water heater |
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| KR100795568B1 (en) * | 2006-11-10 | 2008-01-21 | 고려대학교 산학협력단 | Apparatus for exchaging heat using electronic expansion valve, external unit using electronic expansion valve and system for multi air-conditioner |
| CN200996753Y (en) * | 2006-12-26 | 2007-12-26 | 海信集团有限公司 | Refrigerating system of intermediate air-compensating compressor with economizer |
| CN201344688Y (en) * | 2008-12-31 | 2009-11-11 | 河南新飞家电有限公司 | Automatic defrosting and refrigerating device |
| CN201417014Y (en) * | 2009-06-11 | 2010-03-03 | 苏州大学 | Air source heat pump water heater |
| CN201527097U (en) * | 2009-11-19 | 2010-07-14 | 苏州大学 | Water source heat pump water heater |
| CN202371820U (en) * | 2011-12-23 | 2012-08-08 | 珠海格力电器股份有限公司 | Air conditioner |
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