CN212253006U - Air conditioning system - Google Patents
Air conditioning system Download PDFInfo
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- CN212253006U CN212253006U CN202021281477.9U CN202021281477U CN212253006U CN 212253006 U CN212253006 U CN 212253006U CN 202021281477 U CN202021281477 U CN 202021281477U CN 212253006 U CN212253006 U CN 212253006U
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 claims description 8
- 238000007791 dehumidification Methods 0.000 abstract description 45
- 238000001704 evaporation Methods 0.000 abstract description 18
- 238000001816 cooling Methods 0.000 abstract description 16
- 230000008020 evaporation Effects 0.000 abstract description 13
- 230000009471 action Effects 0.000 abstract description 6
- 238000005057 refrigeration Methods 0.000 description 22
- 230000000694 effects Effects 0.000 description 20
- 230000007704 transition Effects 0.000 description 19
- 239000003507 refrigerant Substances 0.000 description 17
- 238000010438 heat treatment Methods 0.000 description 16
- 238000010586 diagram Methods 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 7
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 238000004781 supercooling Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- 238000003303 reheating Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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Abstract
The utility model provides an air conditioning system, include: the heat exchanger comprises a compressor, an outdoor heat exchanger, a first indoor heat exchanger and a second indoor heat exchanger; the air conditioning system also comprises a first branch and a second branch, wherein one end of the first branch is communicated to the first pipeline, and the other end of the first branch is communicated to the second pipeline; one end of the second branch is communicated to the first pipeline, and the other end of the second branch is communicated to the second pipeline and is positioned between the second indoor heat exchanger and the compressor; the first indoor heat exchanger and the second indoor heat exchanger are arranged side by side, and air flow can sequentially flow through the second indoor heat exchanger and the first indoor heat exchanger to complete heat exchange. According to the utility model discloses can effectively can also effectively improve the temperature of room air under the condition of room air evaporation cooling dehumidification through the combined action of evaporimeter and re-heater for the air-out temperature of air conditioner is unlikely to because the dehumidification and low, avoid the condition emergence that the indoor comfort level descends.
Description
Technical Field
The utility model relates to an air conditioning technology field, concretely relates to air conditioning system.
Background
When the conventional refrigeration air-conditioning system shown in fig. 1 is used for refrigerating in summer, the temperature of an evaporator is generally required to be reduced to a larger extent than the dew point temperature of return air in order to meet the dehumidification requirement.
From the perspective of indoor environment comfort, when the conventional air conditioning system is used for heating in summer, particularly in the plum rain season in the south or in the 'backsouth sky' when dehumidification is needed, the problem that the human body feels uncomfortable due to too low air outlet temperature and indoor temperature occurs.
From the perspective of energy efficiency of the air conditioning system, under the condition that the condensation temperature of the system is certain: the lower the evaporation temperature, i.e. the higher the compressor suction-to-discharge pressure ratio, the lower the energy efficiency of the system. In order to solve the problem of low system energy efficiency caused by large temperature difference between return air temperature and evaporating temperature during operation of an air conditioning system, a patent with the patent number of CN105115181B provides a double-evaporating-temperature system, as shown in figure 2, namely, two high-temperature evaporators and two low-temperature evaporators are respectively arranged in a single or same heat exchange channel, indoor return air is subjected to heat exchange through the high-temperature evaporators and the low-temperature evaporators successively, and outlets of the two evaporators are respectively connected with two independent compression cylinders of a compressor, so that the evaporating temperature of the high-temperature evaporators is higher than the evaporating temperature of a conventional system, and the system energy efficiency is improved. However, the system also has the condition that the air outlet temperature is too low when the system runs in a dehumidification mode, so that the comfort of human bodies is influenced.
When the air conditioning system in the prior art operates in a dehumidification mode in a transition season in a damp and hot area, the comfort is reduced easily due to the fact that the air outlet temperature of the air conditioner is too low; and air conditioning system evaporating temperature crosses low technical problem such as the problem that leads to the system operation efficiency to hang down excessively easily when the refrigeration dehumidification operation, consequently the utility model discloses research and design an air conditioning system.
SUMMERY OF THE UTILITY MODEL
Therefore, the to-be-solved technical problem of the utility model lies in overcoming the air conditioning system among the prior art when damp and hot area transition season dehumidification mode operation, the defect that the travelling comfort that air conditioner air-out temperature leads to excessively hangs down easily to an air conditioning system is provided.
In order to solve the above problem, the present invention provides an air conditioning system, which includes:
the heat exchanger comprises a compressor, an outdoor heat exchanger, a first indoor heat exchanger and a second indoor heat exchanger;
a first pipeline where the first indoor heat exchanger is located and a second pipeline where the second indoor heat exchanger is located are converged and then communicated to the outdoor heat exchanger through a third pipeline, a first throttling device is arranged on the first pipeline, and a second throttling device is arranged on the second pipeline;
the air conditioning system further comprises a first branch and a second branch, one end of the first branch is communicated to the first pipeline and is located between the first indoor heat exchanger and the compressor, and the other end of the first branch is communicated to the second pipeline and is located between the junction of the second pipeline and the first pipeline and the second throttling device; one end of the second branch is communicated to the first pipeline and is positioned between the first indoor heat exchanger and the compressor, and the other end of the second branch is communicated to the second pipeline and is positioned between the second indoor heat exchanger and the compressor;
the first indoor heat exchanger and the second indoor heat exchanger are arranged side by side, and air flow can sequentially flow through the second indoor heat exchanger and the first indoor heat exchanger to complete heat exchange.
Preferably, a third two-way valve is arranged on the first branch, a second two-way valve is arranged on the second branch, a fourth two-way valve is further arranged on the second branch and between the intersection with the first branch and the intersection with the first branch, and a first two-way valve is further arranged on the first branch and between the intersection with the first branch and the intersection with the second branch; or a first three-way valve is arranged at the intersection of the first branch and the second pipeline, and a second three-way valve is arranged at the intersection of the second branch and the first pipeline.
Preferably, the compressor comprises a first cylinder and a second cylinder;
the first cylinder has a first intake port and a first exhaust port, and the second cylinder has a second intake port and a second exhaust port: the outdoor heat exchanger is capable of being communicated to the first exhaust port and the second exhaust port simultaneously, the first indoor heat exchanger is capable of being communicated to the first suction port, and the second indoor heat exchanger is capable of being communicated to the second suction port; or, the outdoor heat exchanger may be communicated to the first suction port and the second suction port at the same time, the first indoor heat exchanger may be communicated to the first exhaust port, and the second indoor heat exchanger may be communicated to the second exhaust port;
or, the first cylinder has a first air suction port, the second cylinder has a second air suction port, and the gas discharged from the first cylinder and the gas discharged from the second cylinder are mixed in the shell of the compressor and then discharged through a third air discharge port: the outdoor heat exchanger is communicable to the third air outlet, the first indoor heat exchanger is communicable to the first air intake, and the second indoor heat exchanger is communicable to the second air intake; alternatively, the outdoor heat exchanger may be communicated to the first suction port and the second suction port at the same time, the first indoor heat exchanger may be communicated to the third discharge port, and the second indoor heat exchanger may be communicated to the third discharge port.
Preferably, the system further comprises a first four-way valve and a second four-way valve:
four ports of the first four-way valve are respectively communicated to the first air suction port, the first exhaust port, the outdoor heat exchanger and the first indoor heat exchanger, and four ports of the second four-way valve are respectively communicated to the second air suction port, the second exhaust port, the outdoor heat exchanger and the second indoor heat exchanger;
or when a third exhaust port is included, four ports of the first four-way valve are respectively communicated to the first air suction port, the third exhaust port, the outdoor heat exchanger and the first indoor heat exchanger, and four ports of the second four-way valve are respectively communicated to the second air suction port, the third exhaust port, the outdoor heat exchanger and the second indoor heat exchanger.
Preferably, when including the second gas vent, air conditioning system still includes oil return device, oil return device sets up at second gas vent, in order to can with the oil backward flow in the gas of second gas vent is to the inner chamber bottom of compressor.
Preferably, the oil return device comprises an oil separator and an oil return assembly, the second exhaust port is communicated with the oil separator through an exhaust pipeline, the bottom of the oil separator is communicated to the bottom of an inner cavity of the compressor through an oil return pipeline, and the oil return assembly comprises a first oil return control valve arranged on the oil return pipeline; or,
the oil return device comprises an oil separator and an oil return assembly, the second exhaust port is communicated with the oil separator through an exhaust pipeline, the bottom of the oil separator is communicated to the bottom of an inner cavity of the compressor through an oil return pipeline, the oil return assembly comprises a second oil return control valve arranged on the oil return pipeline and a parallel pipeline connected with the second oil return control valve in parallel, and an oil return capillary is arranged on the parallel pipeline.
Preferably, the first throttling device is a fully open conducting electronic expansion valve; and/or the second throttling device is a full-open throttling electronic expansion valve.
The utility model provides a pair of air conditioning system has following beneficial effect:
1. the utility model discloses a set up two different branches in first branch road and second branch road, can form effective short circuit effect with the pipeline section between the second branch road intersection with first branch road intersection and first pipeline to first pipeline, and can form short circuit effect with the pipeline section between the first branch road intersection with first pipeline intersection and second pipeline to the second pipeline, make and switch on first branch road and second branch road simultaneously under the relatively big condition of indoor humidity in transition season, make first indoor heat exchanger and second indoor heat exchanger form the series connection, and the first throttling arrangement that the first indoor heat exchanger that the control is located the air current low reaches links to each other is opened entirely, do not form the throttle, just can effectively make first indoor heat exchanger reach the effect (the reheater) of heating to the air, the second indoor heat exchanger cools down the dehumidification to the air, can effectively be to the indoor air evaporation dehumidification under the condition of cooling through the combined action of evaporimeter and reheater, the dehumidification The temperature of indoor air can be effectively improved, so that the condition that the air outlet temperature of the air conditioner is too low due to dehumidification and the indoor comfort degree is reduced is avoided;
2. the utility model also arranges two evaporators at the evaporator side, and carries out gradient cooling and dehumidification treatment on the indoor return air, so that the evaporation temperature at the high temperature side is increased, the corresponding suction pressure is increased, the suction-exhaust pressure ratio is reduced, the power consumption is reduced, the overall energy efficiency of the system is improved, and the operation energy efficiency of the system is effectively improved under the condition of ensuring the refrigerating capacity and the dehumidifying capacity of the system; meanwhile, the temperature of the refrigerant at the outlet of the condenser (the first indoor heat exchanger is used as the condenser) under the working condition of high humidity in the transition season is reduced, the cold discharge supercooling degree of the condenser is effectively increased, the refrigeration evaporation capacity is further improved, the system energy efficiency is improved, and the indoor environment comfort is improved while the dehumidification effect is ensured;
3. the utility model also arranges a second two-way valve on the first branch, a second two-way valve on the second branch, a fourth two-way valve on the second branch and between the junction of the first branch and the junction of the first branch, a first two-way valve on the first branch or a first three-way valve at the junction of the first branch and the second branch, a second three-way valve at the junction of the second branch and the first pipeline, a fourth two-way valve at the junction of the first branch and the second pipeline, a fourth two-way valve or a second three-way valve at different positions to control the air conditioner in different operation modes, especially to control the first branch and the second branch to be conducted under the working condition of high humidity in transition season, form the series connection with first indoor heat exchanger and second indoor heat exchanger, first indoor heat exchanger heats, the refrigeration of second indoor heat exchanger, in order to can also effectively improve the temperature of room air under the condition to the room air evaporation cooling dehumidification, make the air-out temperature of air conditioner be unlikely to because the dehumidification crosses lowly, avoid the condition emergence of indoor comfort level decline, and at conventional refrigeration operating mode, control first indoor heat exchanger and second indoor heat exchanger when heating the operating mode and accomplish normal refrigeration or heat, through this kind of effectual control means, realize the conversion of heat exchanger function under the different operational mode, in order to form the effectual control action of intelligence.
Drawings
Fig. 1 is a system configuration diagram of a conventional single temperature air conditioning system of the first prior art;
fig. 2 is a system configuration diagram of a conventional single temperature air conditioning system of the second prior art;
FIG. 3 is a system structure diagram of the air conditioning system in the cooling mode according to the main embodiment of the present invention;
FIG. 4 is a system structure diagram of the air conditioning system in the heating mode according to the main embodiment of the present invention;
FIG. 5 is a system structure diagram of the main embodiment of the air conditioning system of the present invention in the transition season dehumidification mode (working condition with high humidity);
fig. 6 is a system structure diagram of an alternative embodiment of the air conditioning system of the present invention in a cooling mode;
fig. 7 is a system configuration view of an alternative embodiment of the air conditioning system of the present invention in a heating mode;
fig. 8 is a system structure diagram of an alternative embodiment of the air conditioning system of the present invention in a dehumidification mode (under a condition of high humidity) in a transition season;
fig. 9 is a system structure diagram of an alternative embodiment of the air conditioning system according to the present invention in a second transition season dehumidification mode (working condition with high humidity);
fig. 10 is a system configuration diagram of an alternative embodiment of the air conditioning system according to the present invention in a dehumidification mode in three transition seasons (under a condition of high humidity).
The reference numerals are represented as:
1. a compressor; 101. a first air intake port; 102. a second air suction port; 103. a second exhaust port; 104. a first exhaust port; 105. a third exhaust port; 106. a first pipeline; 107. a second pipeline; 108. a third pipeline; 109. a first branch; 110. a second branch circuit; 2. a first four-way valve; 3. a second four-way valve; 4. an outdoor heat exchanger; 5. the inner machine and the outer machine are connected with a stop valve; 501. the second internal and external machine connecting pipe stop valve; 502. a third internal and external machine connecting pipe stop valve; 6. a first throttling device; 7. a second throttling device; 8. a first indoor heat exchanger; 9. a second indoor heat exchanger; 10. a first two-way valve; 11. a second two-way valve; 12. a third two-way valve; 13. a fourth two-way valve; 14. an oil separator; 15. a first three-way valve; 16. a second three-way valve.
Detailed Description
As shown in fig. 3-10, the present invention provides an air conditioning system, comprising:
the heat exchanger comprises a compressor 1, an outdoor heat exchanger 4, a first indoor heat exchanger 8 and a second indoor heat exchanger 9;
a first pipeline 106 where the first indoor heat exchanger 8 is located and a second pipeline 107 where the second indoor heat exchanger 9 is located are merged and then communicated to the outdoor heat exchanger 4 through a third pipeline 108, a first throttling device 6 is arranged on the first pipeline 106, and a second throttling device 7 is arranged on the second pipeline 107;
the air conditioning system further comprises a first branch 109 and a second branch 110, wherein one end of the first branch 109 is connected to the first pipeline 106 and is located at a position between the first indoor heat exchanger 8 and the compressor 1, and the other end of the first branch 109 is connected to the second pipeline 107 and is located at a position between the intersection of the second pipeline 107 and the first pipeline 106 and the second throttling device 7; one end of the second branch 110 is connected to the first pipeline 106 and is located between the first indoor heat exchanger 8 and the compressor 1, and the other end of the second branch 110 is connected to the second pipeline 107 and is located between the second indoor heat exchanger 9 and the compressor 1;
the first indoor heat exchanger 8 and the second indoor heat exchanger 9 are arranged side by side, and air flow can sequentially flow through the second indoor heat exchanger 9 and the first indoor heat exchanger 8 to complete heat exchange.
The utility model discloses a set up two different branches in first branch road and second branch road, can form effective short circuit effect with the pipeline section between the second branch road intersection with first branch road intersection and first pipeline to first pipeline, and can form short circuit effect with the pipeline section between the first branch road intersection with first pipeline intersection and second pipeline to the second pipeline, make and switch on first branch road and second branch road simultaneously under the relatively big condition of indoor humidity in transition season, make first indoor heat exchanger and second indoor heat exchanger form the series connection, and the first throttling arrangement that the first indoor heat exchanger that the control is located the air current low reaches links to each other is opened entirely, do not form the throttle, just can effectively make first indoor heat exchanger reach the effect (the reheater) of heating to the air, the second indoor heat exchanger cools down the dehumidification to the air, can also effectively be to the indoor air evaporation dehumidification under the condition of cooling through the combined action of evaporimeter and reheater, can also effectively The temperature of indoor air is effectively improved, so that the condition that the air outlet temperature of the air conditioner is too low due to dehumidification and the indoor comfort degree is reduced is avoided;
the utility model also arranges two evaporators at the evaporator side, and carries out gradient cooling and dehumidification treatment on the indoor return air, so that the evaporation temperature at the high temperature side is increased, the corresponding suction pressure is increased, the suction-exhaust pressure ratio is reduced, the power consumption is reduced, the overall energy efficiency of the system is improved, and the operation energy efficiency of the system is effectively improved under the condition of ensuring the refrigerating capacity and the dehumidifying capacity of the system; simultaneously make the temperature of the export refrigerant of condenser (this moment first indoor heat exchanger is used as the condenser) under the big operating mode of transition season humidity reduce, effectively increase the condenser and go out the supercooling degree, thereby further promote refrigeration evaporation capacity and promote the system efficiency, promote the indoor environment travelling comfort when guaranteeing dehumidification effect.
In the main embodiment, as shown in fig. 3 to 5, a third two-way valve 12 is disposed on the first branch 109, a second two-way valve 11 is disposed on the second branch 110, a fourth two-way valve 13 is further disposed on the second pipeline 107 at a position between the intersection with the first pipeline 106 and the intersection with the first branch 109, and a first two-way valve 10 is further disposed on the first pipeline 106 at a position between the intersection with the first branch 109 and the intersection with the second branch 110; alternatively, in alternative embodiments two and three, as shown in fig. 9-10, a first three-way valve 15 is provided at the intersection of the first branch 109 and the second line 107, and a second three-way valve 16 is provided at the intersection of the second branch 110 and the first line 106.
The utility model also arranges a second two-way valve on the first branch, a second two-way valve on the second branch, a fourth two-way valve on the second branch and between the junction of the first branch and the junction of the first branch, a first two-way valve on the first branch or a first three-way valve at the junction of the first branch and the second branch, a second three-way valve at the junction of the second branch and the first pipeline, a fourth two-way valve at the junction of the first branch and the second pipeline, a fourth two-way valve or a second three-way valve at different positions to control the air conditioner in different operation modes, especially to control the first branch and the second branch to be conducted under the working condition of high humidity in transition season, form the series connection with first indoor heat exchanger and second indoor heat exchanger, first indoor heat exchanger heats, the refrigeration of second indoor heat exchanger, in order to can also effectively improve the temperature of room air under the condition to the room air evaporation cooling dehumidification, make the air-out temperature of air conditioner be unlikely to because the dehumidification crosses lowly, avoid the condition emergence of indoor comfort level decline, and at conventional refrigeration operating mode, control first indoor heat exchanger and second indoor heat exchanger when heating the operating mode and accomplish normal refrigeration or heat, through this kind of effectual control means, realize the conversion of heat exchanger function under the different operational mode, in order to form the effectual control action of intelligence.
Preferably, the compressor 1 comprises a first cylinder and a second cylinder;
3-5, the first cylinder has a first intake port 101 and a first exhaust port 104, and the second cylinder has a second intake port 102 and a second exhaust port 103: the outdoor heat exchanger 4 can be communicated to the first exhaust port 104 and the second exhaust port 103 at the same time, the first indoor heat exchanger 8 can be communicated to the first suction port 101, and the second indoor heat exchanger 9 can be communicated to the second suction port 102; alternatively, the outdoor heat exchanger 4 may be communicated to the first suction port 101 and the second suction port 102 at the same time, the first indoor heat exchanger 8 may be communicated to the first exhaust port 104, and the second indoor heat exchanger 9 may be communicated to the second exhaust port 103;
or, in the first alternative embodiment, as shown in fig. 6 to 8, and in the second alternative embodiment, as shown in fig. 10, the first cylinder has a first air intake port 101, the second cylinder has a second air intake port 102, and the air discharged from the first cylinder and the air discharged from the second cylinder are mixed in the interior of the compressor casing and then discharged through a third air discharge port 105: the outdoor heat exchanger 4 is communicable to the third exhaust port 105, the first indoor heat exchanger 8 is communicable to the first suction port 101, and the second indoor heat exchanger 9 is communicable to the second suction port 102; alternatively, the outdoor heat exchanger 4 may be connected to both the first suction port 101 and the second suction port 102, the first indoor heat exchanger 8 may be connected to the third discharge port 105, and the second indoor heat exchanger 9 may be connected to the third discharge port 105.
The utility model discloses a set up the compressor of two at least independent cylinders, and the first indoor heat exchanger that communicates with first cylinder and the second indoor heat exchanger that communicates with the second cylinder, and the first throttling set that sets up on the first pipeline between outdoor heat exchanger and first indoor heat exchanger and the second throttling set that sets up on the second pipeline between outdoor heat exchanger and second indoor heat exchanger, can realize two warm evaporation effectively, through carrying out step cooling dehumidification to indoor return air and handling, high temperature side evaporating temperature improves, corresponding suction pressure improves, make the suction-exhaust pressure ratio reduce, the power consumption reduces thereby improve the whole energy efficiency of system, namely under the condition of guaranteeing system refrigerating capacity and dehumidification volume effectively, promote the system operation energy efficiency; simultaneously make the temperature of the export refrigerant of condenser (this moment first indoor heat exchanger is used as the condenser) under the big operating mode of transition season humidity reduce, effectively increase the condenser and go out the supercooling degree, thereby further promote refrigeration evaporation capacity and promote the system efficiency, promote the indoor environment travelling comfort when guaranteeing dehumidification effect.
Preferably, a first four-way valve 2 and a second four-way valve 3 are also included:
four ports of the first four-way valve 2 are respectively communicated to the first air suction port, the first exhaust port, the outdoor heat exchanger 4 and the first indoor heat exchanger 8, and four ports of the second four-way valve 3 are respectively communicated to the second air suction port, the second exhaust port, the outdoor heat exchanger 4 and the second indoor heat exchanger 9;
or when a third exhaust port is included, four ports of the first four-way valve 2 are respectively communicated to the first air suction port, the third exhaust port, the outdoor heat exchanger 4 and the first indoor heat exchanger 8, and four ports of the second four-way valve 3 are respectively communicated to the second air suction port, the third exhaust port, the outdoor heat exchanger 4 and the second indoor heat exchanger 9.
This is the utility model discloses a two temperature air conditioning system's further preferred structural style can realize the effective switching of first indoor heat exchanger as refrigeration and heating working condition through first cross valve, can realize the effective switching of second indoor heat exchanger as refrigeration and heating working condition through the second cross valve.
Preferably, when the second exhaust port is included, the air conditioning system further includes an oil return device, the oil return device is disposed at the second exhaust port 103 to enable oil in the gas exhausted from the second exhaust port to flow back to the bottom of the inner cavity of the compressor 1. The oil return device can effectively realize oil return of the compressor.
Preferably, the oil return device comprises an oil separator 14 and an oil return assembly, the second exhaust port is communicated with the oil separator 14 through an exhaust pipeline, the bottom of the oil separator 14 is communicated to the bottom of the inner cavity of the compressor 1 through an oil return pipeline, and the oil return assembly comprises a first oil return control valve arranged on the oil return pipeline; this is the utility model discloses an oil return device embodiment 1's preferred structural style, through first oil return control valve and the setting of returning the oil pipe way can effectively control opening and closing of oil return route, can carry out effective oil return effect when needs return oil.
Or,
the oil return device comprises an oil separator 14 and an oil return assembly, the second exhaust port is communicated with the oil separator 14 through an exhaust pipeline, the bottom of the oil separator 14 is communicated to the bottom of the inner cavity of the compressor 1 through an oil return pipeline, the oil return assembly comprises a second oil return control valve arranged on the oil return pipeline and a parallel pipeline connected with the second oil return control valve in parallel, and an oil return capillary tube is arranged on the parallel pipeline. This is the utility model discloses an oil return device's embodiment 2's preferred structural style, through second oil return control valve and the setting of returning the oil pipe way can effective control oil return path open and close, can carry out effective oil return effect (large-traffic) when needs carry out the oil return, can also carry out the oil return effect (little flow) that has the throttle degree through the oil return capillary when second oil return control valve closes, can effectively guarantee that the oil return process lasts effectually going on.
Preferably, the first throttling device 6 is a fully open electronic expansion valve; and/or the second throttling device 7 is a full-open electronic expansion valve. The fully-opened conducting electronic expansion valve has the advantages that the flow cross section area is large when the opening degree is fully opened, the throttling function is omitted, the effect of one connecting pipe can be achieved, the fully-opened non-throttling effect is guaranteed, the second throttling device serving as the fully-opened throttling electronic expansion valve still has the throttling function when the valve is fully conducted, the first throttling device can be fully conducted, the effect of heating (reheating) is guaranteed to be formed when the first indoor heat exchanger is high in humidity, the air outlet temperature of an air conditioner is improved, and the indoor comfort level is improved.
The utility model relates to a control method suitable for preceding arbitrary air conditioning system, it includes:
a detection step, which is used for detecting the operation mode of the air conditioning system;
judging, wherein the operation modes comprise a refrigeration mode, a summer high-temperature environment dehumidification mode, a heating mode and a damp-heat area transition season operation dehumidification mode, and judging which of the multiple modes the current operation mode of the air conditioner belongs to;
and a control step, when the air conditioning system operates in a dehumidification mode in a hot and humid area transition season:
when a first two-way valve, a second two-way valve, a third two-way valve and a fourth two-way valve are included, the first two-way valve 10 is controlled to be closed, the second two-way valve 11 is controlled to be opened, the third two-way valve 12 is controlled to be opened and the fourth two-way valve 13 is controlled to be closed, meanwhile, the opening degree of the first throttling device 6 is controlled to be adjusted to the maximum opening degree, and the second throttling device 7 is normally throttled;
when a first three-way valve and a second three-way valve are included, the first three-way valve 15 is controlled to make the first branch 109 be conductive, the pipe section between the intersection of the second pipeline 107 and the first pipeline 106 and the first three-way valve 15 is disconnected, the second three-way valve 16 is controlled to make the second branch 110 be conductive, the pipe section between the intersection of the first pipeline 106 and the first branch 109 and the intersection of the first pipeline 106 and the second branch 110 is disconnected, and the opening degree of the first throttling device 6 is controlled to be adjusted to the maximum opening degree, so that the second throttling device 7 is normally throttled.
This is the utility model discloses an optimal control method, guarantee promptly to control first branch road and second branch road formation when damp and hot regional transition season operation dehumidification mode and switch on, form the series connection with first indoor heat exchanger and second indoor heat exchanger, first indoor heat exchanger heats, the refrigeration of second indoor heat exchanger, in order to can also effectively improve the temperature of room air under the condition to the dehumidification of room air evaporation cooling, make the air-out temperature of air conditioner unlikely to cross because of the dehumidification is low, avoid the condition of indoor comfort level decline to take place, and normal refrigeration or heating are accomplished to first indoor heat exchanger of control and second indoor heat exchanger during the normal refrigeration operating mode, through this kind of effectual control means, realize the conversion of heat exchanger function under the different operation modes, in order to form the effectual control action of intelligence.
Preferably, the controlling step is further configured to, when the air conditioning system is operating in the cooling mode:
when a first two-way valve, a second two-way valve, a third two-way valve and a fourth two-way valve are included, the first two-way valve 10 is controlled to be opened, the second two-way valve 11 is controlled to be closed, the third two-way valve 12 is controlled to be closed and the fourth two-way valve 13 is controlled to be opened, and meanwhile, the first throttling device 6 is controlled to normally throttle and the second throttling device 7 is controlled to normally throttle;
when a first three-way valve and a second three-way valve are included, the first three-way valve 15 is controlled so that the first branch 109 is disconnected, the pipe section between the intersection of the second pipeline 107 and the first pipeline 106 and the first three-way valve 15 is connected, the second three-way valve 16 is controlled so that the second branch 110 is disconnected, the pipe section between the intersection of the first pipeline 106 and the first branch 109 and the intersection of the first pipeline 106 and the second branch 110 is connected, and the first throttling device 6 and the second throttling device 7 are normally throttled.
This is the utility model discloses an optimal control method guarantees promptly that control first branch road and second branch road all to form when the refrigeration mode and closes, communicates first cylinder and second cylinder with first indoor heat exchanger and second indoor heat exchanger separately, and first indoor heat exchanger and second indoor heat exchanger all refrigerate to evaporate the cooling in order to refrigerate to the room air, through this kind of effectual control means, realize the conversion of heat exchanger function under the different operational mode, in order to form intelligent effectual control effect.
Preferably, the controlling step is further configured to, when the air conditioning system operates in the summer high-temperature environment dehumidification mode:
when a first two-way valve, a second two-way valve, a third two-way valve and a fourth two-way valve are included, the first two-way valve 10 is controlled to be opened, the second two-way valve 11 is controlled to be closed, the third two-way valve 12 is controlled to be closed and the fourth two-way valve 13 is controlled to be opened, and meanwhile, the first throttling device 6 is controlled to normally throttle and the second throttling device 7 is controlled to normally throttle;
when a first three-way valve and a second three-way valve are included, the first three-way valve 15 is controlled so that the first branch 109 is disconnected, the pipe section between the intersection of the second pipeline 107 and the first pipeline 106 and the first three-way valve 15 is connected, the second three-way valve 16 is controlled so that the second branch 110 is disconnected, the pipe section between the intersection of the first pipeline 106 and the first branch 109 and the intersection of the first pipeline 106 and the second branch 110 is connected, and the first throttling device 6 and the second throttling device 7 are normally throttled.
This is the utility model discloses an optimal control method guarantees promptly that first branch road of control and second branch road all form to close when summer high temperature environment dehumidification mode, communicates first cylinder and second cylinder with first indoor heat exchanger and second indoor heat exchanger separately, and first indoor heat exchanger and second indoor heat exchanger all refrigerate to evaporate the cooling in order to refrigerate to the room air, through this kind of effectual control means, realize the conversion of heat exchanger function under the different operational mode, in order to form intelligent effectual control effect.
Preferably, the controlling step is further configured to, when the air conditioning system operates in the heating mode:
when a first two-way valve, a second two-way valve, a third two-way valve and a fourth two-way valve are included, the first two-way valve 10 is controlled to be opened, the second two-way valve 11 is controlled to be closed, the third two-way valve 12 is controlled to be closed and the fourth two-way valve 13 is controlled to be opened, and meanwhile, the first throttling device 6 is controlled to normally throttle and the second throttling device 7 is controlled to normally throttle;
when a first three-way valve and a second three-way valve are included, the first three-way valve 15 is controlled so that the first branch 109 is disconnected, the pipe section between the intersection of the second pipeline 107 and the first pipeline 106 and the first three-way valve 15 is connected, the second three-way valve 16 is controlled so that the second branch 110 is disconnected, the pipe section between the intersection of the first pipeline 106 and the first branch 109 and the intersection of the first pipeline 106 and the second branch 110 is connected, and the first throttling device 6 and the second throttling device 7 are normally throttled.
This is the utility model discloses an it is preferred control method, guarantee promptly to control first branch road and second branch road and all form to close when heating mode, communicate first indoor heat exchanger and second indoor heat exchanger to first cylinder and second cylinder respectively, first indoor heat exchanger and second indoor heat exchanger all heat to indoor air condensation is exothermic and heats, through this kind of effectual control means, realize the conversion of heat exchanger function under the different operational mode, in order to form intelligent effectual control effect.
The refrigeration system shown in fig. 3 includes a compressor 1, two four-way directional valves (a first four-way valve 2 and a second four-way valve 3), four two-way control valves (a first two-way valve 10, a second two-way valve 11, a third two-way valve 12 and a fourth two-way valve 13), an outdoor heat exchanger 4, two electronic expansion valves (a first throttling device 6 and a second throttling device 7), two indoor heat exchangers (a first indoor heat exchanger 8 and a second indoor heat exchanger 9), stop valves between indoor and outdoor machine connection pipes (an indoor and outdoor machine connection pipe stop valve 5, a second indoor and outdoor machine connection pipe stop valve 501 and a third indoor and outdoor machine connection pipe stop valve 502), and fans and the like disposed near the heat exchangers.
The compressor 1 is provided with two compression cylinders which are independent of each other and are respectively connected with two air suction ports (a first air suction port 101 and a second air suction port 102), and the displacement of the two compression cylinders connected with the two air suction ports is Va and Vb respectively, wherein the value of (Va/Vb) is between 0.5 and 2; the exhaust ports (a first exhaust port 104 and a second exhaust port 103) of the two compression cylinders are respectively connected with the suction ports (a first suction port 101 and a second suction port 102) of the compressor; wherein, the D pipe of the first four-way valve 2 is connected with the first exhaust port 104 of the compressor, the C pipe is connected with the inlet of the outdoor heat exchanger 4, and the S pipe is connected with the first suction port 101 of the compressor; a pipe D of the second four-way valve 3 is connected with an air outlet of the oil separator, wherein a second air outlet 103 of the compressor is connected with the oil separator 14, a pipe C is converged with a pipe C of the first four-way reversing valve and then enters an inlet end of an external machine heat exchanger, a pipe E of the second four-way reversing valve is connected with one end of a second indoor heat exchanger 9, and meanwhile, the other second air suction port 102 of the S-pipe compressor of the second four-way reversing valve is connected; the outdoor heat exchanger 4 and the first and second indoor heat exchangers 8 and 9 are connected by two electronic expansion valves (the first throttle device 6 and the second throttle device 7).
When the refrigeration mode and the summer high-temperature environment dehumidification mode operate, the D pipe and the C pipe of the first four-way reversing valve and the second four-way reversing valve are communicated, and the E pipe and the S pipe are communicated. At this time, the second two-way valve 11 and the third two-way valve 12 are in the off state, and the first two-way valve 10 and the fourth two-way valve 13 are in the on state. High-pressure gas compressed by a compressor passes through D pipes of two four-way valves (a first four-way valve 2 and a second four-way valve 3) and is respectively communicated and converged with C pipes of the two four-way reversing valves and then enters an inlet of an outdoor heat exchanger 4, heat is released in an outdoor condenser and condensed into high-pressure refrigerant liquid, the high-pressure refrigerant liquid respectively enters two evaporators (a first indoor heat exchanger 8 and a second indoor heat exchanger 9) after being throttled by electronic expansion valves (a first throttling device 6 and a second throttling device 7), throttled low-pressure two-phase refrigerant respectively absorbs heat and is gasified in the two evaporators, the gasified refrigerant gas is respectively communicated with E pipes of the first four-way reversing valve and the second four-way reversing valve, the E pipes of the two four-way reversing valves are respectively communicated with an S pipe, and the refrigerant gas is respectively conveyed to two air suction ports a of the compressor, And b, compressing to complete the whole refrigeration cycle.
In the heating mode, the four-way reversing valves are in a second conduction state, namely the D pipes and the E pipes of the two four-way reversing valves are communicated, and the S pipes and the C pipes are communicated. At this time, the second two-way valve 11 and the third two-way valve 12 are in the off state, and the first two-way valve 10 and the fourth two-way valve 13 are in the on state. The exhaust of the compressor is respectively connected to the first indoor heat exchanger 8 and the second indoor heat exchanger 9 through a D pipe and an E pipe of the four-way reversing valve, high-pressure refrigerant gas is subjected to heat release and condensation in the first indoor heat exchanger 8 and the second indoor heat exchanger 9 to form high-pressure liquid, then is throttled and mixed through electronic expansion valves (a first throttling device 6 and a second throttling device 7) respectively and then is sent to the outdoor heat exchanger, and is subjected to heat absorption and gasification in the outdoor heat exchanger and then is sent to two air suction ports of the compressor through a C pipe and an S pipe of the first four-way reversing valve and the second four-way reversing valve respectively, so that the whole refrigerant circulation.
When the dehumidification mode is operated in a transition season of a damp and hot area, the D pipe and the C pipe of the first four-way reversing valve and the second four-way reversing valve are communicated, and the E pipe and the S pipe are communicated. At this time, the second two-way valve 11 and the third two-way valve 12 are in the on state, and the first two-way valve 10 and the fourth two-way valve 13 are in the off state. High-pressure gas compressed by a compressor passes through D pipes of two four-way reversing valves (a first four-way valve 2 and a second four-way valve 3), is respectively communicated and converged with C pipes of the two four-way reversing valves and then enters an inlet of an outdoor heat exchanger 4, heat is released in an outdoor condenser and condensed into high-pressure refrigerant liquid, at the moment, an electronic expansion valve (a first throttling device 6) is in a fully open state, high-temperature refrigerant liquid firstly passes through the first throttling device 6 and then respectively enters a first indoor heat exchanger 8, is further cooled in the first indoor heat exchanger 8 and then is throttled by a second throttling device 7 to become low-pressure two-phase refrigerant, the low-pressure two-phase refrigerant enters a second indoor heat exchanger 9 to absorb heat and gasify, the gasified refrigerant gas is respectively communicated with E pipes of the first four-way reversing valve and the second four-way reversing valve, and the E pipes of the two four-way reversing valves are, the refrigerant gas is respectively delivered to two air suction ports a and b of the compressor to be compressed, and the whole refrigeration cycle is completed.
The first throttle device 6 is a special electronic expansion valve which is conducted when the valve is fully opened and plays a role in throttling when the valve is normally adjusted, and the second throttle device 7 can be a conventional electronic expansion valve.
As shown in fig. 6, 7 and 8, in the alternative embodiment 1, the double-suction double-row compressor in the original main embodiment is replaced by the double-suction single-row compressor, that is, two compression cylinders of the compressor respectively compress the gas sucked from two suction ports of the compressor, then the gas is mixed in the compressor shell and then is discharged through the same exhaust port of the compressor, and the gas operation mode is the same as that of the main embodiment;
fig. 9 and 10 are respectively a second and a third embodiments of the present disclosure, and mainly replace the four-way two-way valve in the main embodiment with two three-way valves, where the first three-way valve 15 is in an a-b conducting state during the cooling and heating mode, the second three-way valve 16 is in an f-d conducting state, the first three-way valve 15 is in a c-b conducting state during the transitional season dehumidification mode, and the second three-way valve 16 is in an e-d conducting state.
The technical effects of this application: through the improvement to indoor heat exchanger connecting line and the optimization of operation control mode, increase damp and hot area air supply reheat mode when the dehumidification mode operation in transition season, improve air supply temperature, satisfy the requirement of indoor environment travelling comfort, realize the high-efficient comfortable operation under the multiple operation mode.
The utility model discloses lie in:
1. two evaporators are arranged on the evaporator side, and the running energy efficiency of the system is improved by performing gradient cooling and dehumidifying treatment on indoor return air under the condition of ensuring the refrigerating capacity and dehumidifying capacity of the system;
2. when the dehumidification mode in a transition season operates, the leeward side heat exchanger can be converted into the reheating heat exchanger through control of a valve, so that the air supply temperature during the operation of the dehumidification mode is improved, the temperature of a refrigerant at the outlet of a condenser is reduced, the cold degree and the supercooling degree of the condenser are increased, the energy efficiency of a system is improved, and the indoor environment comfort is improved while the dehumidification effect is ensured;
3. the function conversion of the heat exchanger under different operation modes is realized through a reasonable control method.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (6)
1. An air conditioning system characterized by: the method comprises the following steps:
the heat exchanger comprises a compressor (1), an outdoor heat exchanger (4), a first indoor heat exchanger (8) and a second indoor heat exchanger (9);
a first pipeline (106) where the first indoor heat exchanger (8) is located and a second pipeline (107) where the second indoor heat exchanger (9) is located are converged and then communicated to the outdoor heat exchanger (4) through a third pipeline (108), a first throttling device (6) is arranged on the first pipeline (106), and a second throttling device (7) is arranged on the second pipeline (107);
the air conditioning system further comprises a first branch (109) and a second branch (110), one end of the first branch (109) is communicated to the first pipeline (106) and is positioned between the first indoor heat exchanger (8) and the compressor (1), and the other end of the first branch (109) is communicated to the second pipeline (107) and is positioned between the junction of the second pipeline (107) and the first pipeline (106) and the second throttling device (7); one end of the second branch (110) is communicated to the first pipeline (106) and is positioned between the first indoor heat exchanger (8) and the compressor (1), and the other end of the second branch (110) is communicated to the second pipeline (107) and is positioned between the second indoor heat exchanger (9) and the compressor (1);
the first indoor heat exchanger (8) and the second indoor heat exchanger (9) are arranged side by side, and air flow can sequentially flow through the second indoor heat exchanger (9) and the first indoor heat exchanger (8) to complete heat exchange.
2. The air conditioning system of claim 1, wherein:
a third two-way valve (12) is arranged on the first branch (109), a second two-way valve (11) is arranged on the second branch (110), a fourth two-way valve (13) is further arranged on the second pipeline (107) and at a position between the intersection with the first pipeline (106) and the intersection with the first branch (109), and a first two-way valve (10) is further arranged on the first pipeline (106) and at a position between the intersection with the first branch (109) and the intersection with the second branch (110); or a first three-way valve (15) is arranged at the intersection of the first branch (109) and the second pipeline (107), and a second three-way valve (16) is arranged at the intersection of the second branch (110) and the first pipeline (106).
3. The air conditioning system of claim 1, wherein:
the compressor (1) comprises a first cylinder and a second cylinder;
the first cylinder has a first intake port (101) and a first exhaust port (104), and the second cylinder has a second intake port (102) and a second exhaust port (103): the outdoor heat exchanger (4) is connectable to the first exhaust port (104) and the second exhaust port (103) at the same time, the first indoor heat exchanger (8) is connectable to the first intake port (101), and the second indoor heat exchanger (9) is connectable to the second intake port (102); or, the outdoor heat exchanger (4) can be communicated to the first suction port (101) and the second suction port (102) at the same time, the first indoor heat exchanger (8) can be communicated to the first exhaust port (104), and the second indoor heat exchanger (9) can be communicated to the second exhaust port (103);
or, the first cylinder is provided with a first air suction port (101), the second cylinder is provided with a second air suction port (102), and the gas discharged by the first cylinder and the gas discharged by the second cylinder are mixed in the shell of the compressor and then discharged through a third air discharge port (105): the outdoor heat exchanger (4) is communicable to the third exhaust port (105), the first indoor heat exchanger (8) is communicable to the first suction port (101), and the second indoor heat exchanger (9) is communicable to the second suction port (102); alternatively, the outdoor heat exchanger (4) may be communicated to the first suction port (101) and the second suction port (102) at the same time, the first indoor heat exchanger (8) may be communicated to the third discharge port (105), and the second indoor heat exchanger (9) may also be communicated to the third discharge port (105).
4. The air conditioning system of claim 3, wherein:
still include first cross valve (2) and second cross valve (3):
four ports of the first four-way valve (2) are respectively communicated to the first air suction port, the first exhaust port, the outdoor heat exchanger (4) and the first indoor heat exchanger (8), and four ports of the second four-way valve (3) are respectively communicated to the second air suction port, the second exhaust port, the outdoor heat exchanger (4) and the second indoor heat exchanger (9);
or when a third exhaust port is included, four ports of the first four-way valve (2) are respectively communicated to the first air suction port, the third exhaust port, the outdoor heat exchanger (4) and the first indoor heat exchanger (8), and four ports of the second four-way valve (3) are respectively communicated to the second air suction port, the third exhaust port, the outdoor heat exchanger (4) and the second indoor heat exchanger (9).
5. The air conditioning system of claim 3, wherein:
when the second air outlet is included, the air conditioning system further comprises an oil return device, wherein the oil return device is arranged at the second air outlet (103) and can be used for returning oil in the air discharged from the second air outlet to the bottom of the inner cavity of the compressor (1);
the oil return device comprises an oil separator (14) and an oil return assembly, the second exhaust port is communicated with the oil separator (14) through an exhaust pipeline, the bottom of the oil separator (14) is communicated to the bottom of an inner cavity of the compressor (1) through an oil return pipeline, and the oil return assembly comprises a first oil return control valve arranged on the oil return pipeline; or,
the oil return device comprises an oil separator (14) and an oil return assembly, the second exhaust port is communicated with the oil separator (14) through an exhaust pipeline, the bottom of the oil separator (14) is communicated to the bottom of an inner cavity of the compressor (1) through an oil return pipeline, the oil return assembly comprises a second oil return control valve arranged on the oil return pipeline and a parallel pipeline connected with the second oil return control valve in parallel, and an oil return capillary tube is arranged on the parallel pipeline.
6. The air conditioning system according to any one of claims 1 to 5, characterized in that:
the first throttling device (6) is a fully-opened conducting electronic expansion valve; and/or the second throttling device (7) is a full-open throttling electronic expansion valve.
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| CN202021281477.9U CN212253006U (en) | 2020-07-02 | 2020-07-02 | Air conditioning system |
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| CN202021281477.9U CN212253006U (en) | 2020-07-02 | 2020-07-02 | Air conditioning system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111765567A (en) * | 2020-07-02 | 2020-10-13 | 珠海格力电器股份有限公司 | Air conditioning system and control method thereof |
| CN114278984A (en) * | 2021-12-14 | 2022-04-05 | 广东芬尼克兹节能设备有限公司 | Multifunctional air conditioner, control method and computer readable storage medium |
-
2020
- 2020-07-02 CN CN202021281477.9U patent/CN212253006U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111765567A (en) * | 2020-07-02 | 2020-10-13 | 珠海格力电器股份有限公司 | Air conditioning system and control method thereof |
| CN111765567B (en) * | 2020-07-02 | 2024-07-02 | 珠海格力电器股份有限公司 | Air conditioning system and control method thereof |
| CN114278984A (en) * | 2021-12-14 | 2022-04-05 | 广东芬尼克兹节能设备有限公司 | Multifunctional air conditioner, control method and computer readable storage medium |
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