CN113154731A - Three-pipe multi-split air conditioning system without defrosting shutdown - Google Patents
Three-pipe multi-split air conditioning system without defrosting shutdown Download PDFInfo
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- CN113154731A CN113154731A CN202110482210.9A CN202110482210A CN113154731A CN 113154731 A CN113154731 A CN 113154731A CN 202110482210 A CN202110482210 A CN 202110482210A CN 113154731 A CN113154731 A CN 113154731A
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- indoor unit
- heat exchanger
- defrosting
- air conditioning
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
- F25B47/022—Defrosting cycles hot gas defrosting
- F25B47/025—Defrosting cycles hot gas defrosting by reversing the cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/005—Arrangement or mounting of control or safety devices of safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
- F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B6/00—Compression machines, plants or systems, with several condenser circuits
- F25B6/02—Compression machines, plants or systems, with several condenser circuits arranged in parallel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2347/00—Details for preventing or removing deposits or corrosion
- F25B2347/02—Details of defrosting cycles
- F25B2347/021—Alternate defrosting
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a three-pipe multi-split air conditioning system without shutdown defrosting, when outdoor units are connected in parallel, the characteristic that one pipe always keeps a low-pressure state no matter an indoor unit of an air conditioner is in a refrigerating and heating mode is utilized, the shutdown defrosting control of the parallel outdoor units is realized in a simple and low-cost mode, the equipment volume is greatly reduced, the equipment cost is reduced, the reliability of the integral operation of the equipment is improved, the heating comfort is improved, the heat exchange efficiency is improved, and the application place of the shutdown defrosting is greatly improved.
Description
Technical Field
The invention relates to the technical field of multi-split air-conditioning systems, in particular to a three-pipe multi-split air-conditioning system without defrosting.
Technical Field
At present, when the existing multi-split air conditioner runs in parallel, normal defrosting generally needs to be conducted through the four-way valves of all outdoor units in a reversing mode, and a heat exchanger of the outdoor unit is used as a condenser to conduct reversing defrosting by means of heat generated by a compressor. If the non-stop defrosting is to be realized, a phase change heat storage module is required to be added or an outdoor unit heat exchanger is required to be modified, and the double heat exchangers are used for the non-stop defrosting. And defrosting without shutdown is realized by adding the phase change heat storage module or using the double heat exchangers, extra cost and equipment space are needed, and the equipment is large in size and high in total cost.
In the existing multi-split air conditioning system, a hydraulic module or an indoor unit is used as an evaporator to absorb heat in the defrosting process under the heating water or air conditioning heating mode. In order to reduce the influence of the defrosting process on the indoor environment temperature and the indoor unit, the indoor unit generally enters a cold air prevention mode in the defrosting process, a fan of the indoor unit is not turned on, a large amount of liquid refrigerant flows through the indoor unit and then returns to the compressor, and the process is easy to cause liquid impact of the compressor, so that the service life of the compressor and the reliability of a system are influenced. In the defrosting process, the water power module or the indoor unit is used as an evaporator, so that the water temperature of the water power module is reduced, or the temperature of the use environment at the inner side of the air conditioner is reduced, and the user experience is influenced. Meanwhile, the four-way valve needs to be reversed in the defrosting process, so that the air conditioner cannot effectively heat or produce hot water, the effective heating or hot water producing time of the air conditioner is shortened, and the effective utilization rate of equipment is low. Meanwhile, when the multi-split air conditioner system is defrosted, the reversing of a four-way valve or a hydraulic module of an outdoor unit of an indoor unit needs to be controlled. The refrigerant impact sound in the reversing process of the four-way valve of the indoor unit can form larger noise at the indoor side. Meanwhile, in the defrosting process of the air conditioner indoor unit, a large amount of refrigerant still passes through the air conditioner indoor unit, refrigerant flowing sound is generated, and user experience is seriously influenced. And the hydraulic module is used for reversing, and a large amount of low-pressure liquid refrigerant flows through the hydraulic module, so that the hydraulic module is easy to freeze and damage.
The existing multi-split air conditioner can be used for defrosting without stopping under specific conditions, namely when a hydraulic module is used for refrigerating water. However, in general, the working condition of heating water with defrosting requirement is generally a low-temperature working condition, and at this time, the requirement of cooling water is low, particularly the probability that cooling water is still needed at ultralow temperature is low, so that the application range of the defrosting-uninterrupted mode is seriously influenced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a three-pipe multi-split air conditioning system without defrosting.
In order to achieve the purpose, the three-pipe multi-split air conditioning system capable of defrosting without stopping comprises at least two outdoor units arranged in parallel, at least two indoor units arranged in parallel and a hydraulic module which are connected through a pipeline, wherein each outdoor unit comprises a compressor, an oil separator, a reversing device, a fin heat exchanger, a compressor heat dissipation module, a plate heat exchanger, a first valve piece, a second valve piece, a gas-liquid separator, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, a fourth electromagnetic valve and a fifth electromagnetic valve, the output end of the compressor is connected with one end of the oil separator, and the other end of the oil separator is connected with the reversing device; the indoor unit comprises an indoor unit heat exchanger, a third valve and an indoor unit fan; the hydraulic module comprises a refrigerant water heat exchanger, a water pump, a water temperature detection sensor, a water flow switch, a sixth electromagnetic valve, a seventh electromagnetic valve, a fourth valve, a fifth valve, a first check valve and a second check valve.
Furthermore, the reversing device comprises a first four-way valve, a second four-way valve and a third four-way valve, the first four-way valve, the second four-way valve and the third four-way valve are all provided with a C end, a D end, an E end and an S end, and the S ends of the first four-way valve, the second four-way valve and the third four-way valve are all connected with the gas-liquid separator.
Further, the first valve part, the second valve part, the third valve part, the fourth valve part and the fifth valve part are all electronic expansion valves.
Further, the output end of the compressor is provided with a high-voltage switch for detecting exhaust pressure, and the input end of the compressor is provided with a low-voltage switch for detecting return air pressure.
Furthermore, the outdoor unit also comprises a liquid side stop valve connected with the indoor unit and the hydraulic module, a gas side stop valve connected with the indoor unit and a hydraulic module stop valve connected with the hydraulic module.
Further, the outdoor unit further comprises an outdoor unit fan, and the outdoor unit fan is arranged in the fin heat exchanger.
Furthermore, the indoor unit also comprises an indoor unit fan, and the indoor unit fan is arranged in the indoor unit heat exchanger.
Further, any indoor unit further includes an indoor unit ambient temperature sensor for detecting an ambient temperature of the indoor unit.
Furthermore, any indoor unit also comprises an indoor unit heat exchanger middle temperature sensor for detecting the temperature of the middle part of the indoor unit heat exchanger.
Furthermore, any indoor unit also comprises an indoor unit heat exchanger outlet temperature sensor for detecting the outlet temperature of the indoor unit heat exchanger.
The invention has the beneficial effects that: when the outdoor units are connected in parallel, the characteristic that one pipe always keeps a low-pressure state no matter the air-conditioning indoor unit is in a refrigerating and heating mode is utilized, the non-shutdown defrosting control of the parallel outdoor units is realized in a simple and low-cost mode, the equipment volume is greatly reduced, the equipment cost is reduced, the reliability of the whole operation of the equipment is improved, the heating comfort is improved, the heat exchange efficiency is improved, and the application place of the non-shutdown defrosting is greatly improved.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural diagram of a three-pipe multi-split air conditioning system for defrosting without shutdown;
fig. 2 is a schematic flow diagram of a refrigeration defrosting refrigerant of a three-pipe multi-split air conditioning system for defrosting without shutdown;
fig. 3 is a schematic flow diagram of a heating defrosting refrigerant of a three-pipe multi-split air conditioning system for defrosting without shutdown.
The reference numbers in the figures are: 100-outdoor unit, 200-indoor unit and 300-hydraulic module;
1-a compressor, 2-an oil separator, 3-a reversing device, 4-a finned heat exchanger, 5-a compressor heat dissipation module, 6-a plate heat exchanger, 7-a first valve, 8-a second valve, 9-a gas-liquid separator, 10-a first solenoid valve, 11-a second solenoid valve, 12-a third solenoid valve, 13-a fourth solenoid valve, 14-a fifth solenoid valve, 15-an outdoor unit fan, 16-a liquid side stop valve, 17-a gas side stop valve, 18-a hydraulic module stop valve, 3 a-a first four-way valve, 3 b-a second four-way valve and 3 c-a third four-way valve;
21-indoor unit heat exchanger, 22-third valve, 23-indoor unit fan, 24-indoor unit environment temperature sensor, 25-indoor unit heat exchanger middle temperature sensor, and 26-indoor unit heat exchanger outlet temperature sensor;
31-refrigerant water heat exchanger, 32-water pump, 33-water temperature detection sensor, 34-water flow switch, 35-sixth electromagnetic valve, 36-seventh electromagnetic valve, 37-fourth valve, 38-fifth valve, 39-first check valve and 40-second check valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is also changed accordingly, and the connection may be a direct connection or an indirect connection.
In addition, descriptions related to "first", "second", "third", "fourth", etc. in the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of the feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
As shown in fig. 1, a three-pipe multi-split air conditioning system without defrosting operation comprises at least two outdoor units 100 connected in parallel through a pipeline, at least two indoor units 200 connected in parallel, and a hydraulic module 300, wherein the outdoor unit 100 comprises a compressor 1, an oil separator 2, a reversing device 3, a fin heat exchanger 4, a compressor heat dissipation module 5, a plate heat exchanger 6, a first valve 7, a second valve 8, a gas-liquid separator 9, a first electromagnetic valve 10, a second electromagnetic valve 11, a third electromagnetic valve 12, a fourth electromagnetic valve 13, and a fifth electromagnetic valve 14, an output end of the compressor 1 is connected with one end of the oil separator 2, and the other end of the oil separator 2 is connected with the reversing device 3; the indoor unit 200 comprises an indoor unit heat exchanger 21, a third valve element 22 and an indoor unit fan 23; the hydraulic module 300 includes a refrigerant water heat exchanger 31, a water pump 32, a water temperature detection sensor 33, a water flow switch 34, a sixth solenoid valve 35, a seventh solenoid valve 37, a fourth valve 37, a fifth valve 38, a first check valve 39 and a second check valve 40.
Further, the reversing device 3 includes a first four-way valve 3a, a second four-way valve 3b and a third four-way valve 3C, the first four-way valve 3a, the second four-way valve 3b and the third four-way valve 3C are all provided with a C end, a D end, an E end and an S end, and the S ends of the first four-way valve 3a, the second four-way valve 3b and the third four-way valve 3C are all connected with the gas-liquid separator 9.
Preferably, the first valve element 7, the second valve element 8, the third valve element 22, the fourth valve element 37 and the fifth valve element 38 are all electronic expansion valves, and the flow rate of the refrigerant in the pipeline where the corresponding valve element is located can be adjusted by adjusting the opening degree of the electronic expansion valves.
Preferably, the output end of the compressor 1 is provided with a high-voltage switch for detecting exhaust pressure, the input end of the compressor 1 is provided with a low-voltage switch for detecting return air pressure, the exhaust pressure is detected by adopting the high-voltage switch, and once the exhaust pressure exceeds preset pressure, the system is closed, so that the safe and stable operation of the system is ensured; and the low-pressure switch is adopted to detect the return air pressure, and once the return air pressure is lower than the preset pressure, the system is closed, so that the safe and stable operation of the system is ensured.
Preferably, the outdoor unit 100 further includes a liquid side shutoff valve 16 connected to the indoor unit 200 and the hydro module 300, a gas side shutoff valve 17 connected to the indoor unit 200, and a hydro module shutoff valve 18 connected to the hydro module 300, and the flow rate can be adjusted as needed by utilizing a shutoff function.
Preferably, the outdoor unit 100 further includes an outdoor unit fan 15, and the outdoor unit fan 15 is disposed in the fin heat exchanger 4 to improve the heat exchange efficiency of the fin heat exchanger 4.
Preferably, the indoor unit 200 further includes an indoor unit fan 23, and the indoor unit fan 23 is disposed in the indoor unit heat exchanger 21 to improve the heat exchange efficiency of the indoor unit heat exchanger 21.
Preferably, any indoor unit 200 further includes an indoor unit ambient temperature sensor 24 for detecting an ambient temperature of the indoor unit 200, the indoor unit ambient temperature sensor 24 is disposed in the indoor unit 200, the ambient temperature of the indoor unit 200 is monitored in real time, when the indoor temperature meets a set requirement, the operation of the indoor and outdoor units 100 is controlled, the outdoor unit 100 is stopped during cooling, the indoor unit 200 continues to operate, and the indoor unit 200 is stopped after blowing waste heat during heating.
Preferably, any indoor unit 200 further comprises an indoor unit heat exchanger middle temperature sensor 25 for detecting the middle temperature of the indoor unit heat exchanger 21, so as to prevent the system from overheating or overcooling to start corresponding protection.
Preferably, any indoor unit 200 further includes an indoor unit heat exchanger outlet temperature sensor 26 for detecting the outlet temperature of the indoor unit heat exchanger 21, and for monitoring whether the outlet temperature of the indoor unit heat exchanger 21 is abnormal.
For convenience of understanding, the embodiment further describes the three-pipe multi-split air conditioning system for defrosting without shutdown in combination with specific working conditions.
Referring to fig. 2, when the air conditioning indoor unit 200 is in the cooling mode, the cooling capacity of the air conditioning indoor unit 200 is less, and the hydraulic module 300 still needs more energy for heating water. At this time, the outdoor unit 100 may be frosted. Under normal control, the first four-way valve 3a is powered off, the end D is connected with the end C, the end E is connected with the end S, and the state of the pipeline refrigerant at the gas side stop valve 17 is a low-pressure gaseous refrigerant; the second four-way valve 3b is powered on, the D end is connected with the E end, the C end is connected with the S end, and the heat exchanger of the outdoor unit 100 is used as an evaporator; the third four-way valve 3C is powered on, the end D is connected with the end E, the end C is connected with the end S, and the pipeline refrigerant at the hydraulic module stop valve 18 is in a high-pressure gaseous refrigerant state. The fourth valve element 37 and the fifth valve element 38 of the refrigeration hydraulic module 300 are opened, the sixth electromagnetic valve 35 is opened, and the seventh electromagnetic valve 37 is closed; the fourth valve element 37 and the fifth valve element 38 of the heating hydraulic module 300 are opened, the seventh electromagnetic valve 37 is opened, and the sixth electromagnetic valve 35 is closed; the shutdown hydro module 300 closes the fourth valve element 37 and the fifth valve element 38, opens the sixth solenoid valve 35, and closes the seventh solenoid valve 37.
When defrosting, the outdoor unit 100 does not enter the alternate defrosting unit and maintains the above state. The state of the outdoor unit 100 for defrosting by rotation is as follows: the first four-way valve 3a is powered off, the end D is connected with the end C, the end E is connected with the end S, and the state of the pipeline refrigerant at the gas side stop valve 17 is a low-pressure gaseous refrigerant; when the second four-way valve 3b is powered off, the end D is connected with the end C, the end E is connected with the end S, and the heat exchanger of the outdoor unit 100 is used as a condenser and enters a defrosting mode; the third four-way valve 3C is powered on, the end D is connected with the end E, the end C is connected with the end S, and the pipeline refrigerant at the hydraulic module stop valve 18 is in a high-pressure gaseous refrigerant state. And the hydraulic module 300 and the air-conditioning indoor unit 200 keep the normal operation state.
Referring to fig. 3, when the air conditioning indoor unit 200 is in the heating mode, the first four-way valve 3a is powered on, the end D is connected to the end E, the end C is connected to the end S, and the refrigerant in the pipeline at the air side stop valve 17 is in a high-pressure gaseous refrigerant state; the second four-way valve 3b is powered on, the D end is connected with the E end, the C end is connected with the S end, and the heat exchanger of the outdoor unit 100 is used as an evaporator; when the power of the third four-way valve 3C is off, the end D is connected with the end C, the end E is connected with the end S, and the pipeline refrigerant at the hydraulic module stop valve 18 is in a low-pressure gaseous refrigerant state. The fourth valve element 37 and the fifth valve element 38 of the refrigeration hydraulic module 300 are opened, the seventh electromagnetic valve 37 is opened, and the sixth electromagnetic valve 35 is closed; the fourth valve element 37 and the fifth valve element 38 of the heating hydraulic module 300 are opened, the sixth electromagnetic valve 35 is opened, and the seventh electromagnetic valve 37 is closed; the shutdown hydro module 300 closes the fourth valve element 37 and the fifth valve element 38, opens the seventh solenoid valve 37, and closes the sixth solenoid valve 35.
When defrosting, the outdoor unit 100 does not enter the alternate defrosting unit and maintains the above state. The state of the outdoor unit 100 for defrosting by rotation is as follows: the first four-way valve 3a is powered on, the end D is connected with the end E, the end C is connected with the end S, and the state of the pipeline refrigerant at the gas side stop valve 17 is a high-pressure gaseous refrigerant; when the second four-way valve 3b is powered off, the end D is connected with the end C, the end E is connected with the end S, and the heat exchanger of the outdoor unit 100 is used as an evaporator; when the power of the third four-way valve 3C is off, the end D is connected with the end C, the end E is connected with the end S, and the pipeline refrigerant at the hydraulic module stop valve 18 is in a low-pressure gaseous refrigerant state. And the hydraulic module 300 and the air-conditioning indoor unit 200 keep the normal operation state.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (10)
1. The utility model provides a three-pipe system multi-split air conditioning system of frost does not shut down, includes through the pipeline connect at least two outdoor unit (100) that set up in parallel, at least two indoor set (200) and water conservancy module (300) that set up in parallel, its characterized in that:
the outdoor unit (100) comprises a compressor (1), an oil separator (2), a reversing device (3), a fin heat exchanger (104), a compressor heat dissipation module (5), a plate heat exchanger (6), a first valve piece (7), a second valve piece (8), a gas-liquid separator (9), a first electromagnetic valve (10), a second electromagnetic valve (11), a third electromagnetic valve (12), a fourth electromagnetic valve (13) and a fifth electromagnetic valve (14), wherein the output end of the compressor (1) is connected with one end of the oil separator (2), and the other end of the oil separator (2) is connected with the reversing device (3);
the indoor unit (200) comprises an indoor unit heat exchanger (21), a third valve element (22) and an indoor unit fan (23);
the hydraulic module (300) comprises a refrigerant water heat exchanger (31), a water pump (32), a water temperature detection sensor (33), a water flow switch (34), a sixth electromagnetic valve (35), a seventh electromagnetic valve (36), a fourth valve (37), a fifth valve (38), a first check valve (39) and a second check valve (40).
2. A multi-split air conditioning system with three pipes for non-stop defrosting according to claim 1, wherein the reversing device (3) comprises a first four-way valve (3 a), a second four-way valve (3 b) and a third four-way valve (3C), the first four-way valve (3 a), the second four-way valve (3 b) and the third four-way valve (3C) are all provided with a C end, a D end, an E end and an S end, and the S ends of the first four-way valve (3 a), the second four-way valve (3 b) and the third four-way valve (3C) are all connected with the gas-liquid separator (9).
3. A multi-split air conditioning system with three control valves and without defrosting operation as claimed in claim 1, wherein the first valve element (7), the second valve element (8), the third valve element (22), the fourth valve element (37) and the fifth valve element (38) are all electronic expansion valves.
4. The multi-split air conditioning system with three pipes and without defrosting operation according to claim 1, wherein the output end of the compressor (1) is provided with a high-pressure switch for detecting the discharge pressure and the return end of the compressor (1) is provided with a low-pressure switch for detecting the return pressure.
5. The multi-split air conditioning system with three pipes for non-stop defrosting according to claim 1, wherein the outdoor unit (100) further comprises a liquid side stop valve (16) connected to the indoor unit (200) and the hydraulic module (300), a gas side stop valve (17) connected to the indoor unit (200), and a hydraulic module stop valve (18) connected to the hydraulic module (300).
6. The multi-split air conditioning system without stop defrosting of claim 1, wherein the outdoor unit (100) further comprises an outdoor unit fan (15), and the outdoor unit fan (15) is disposed in the finned heat exchanger (104).
7. The multi-split air conditioning system without shutdown of frost, as recited in claim 1, wherein said indoor unit (200) further comprises an indoor unit fan (23), said indoor unit fan (23) is disposed in an indoor unit heat exchanger (21).
8. The multi-split air conditioning system without stopping defrosting of the air conditioner, according to claim 1, wherein any of the indoor units (200) further comprises an indoor unit ambient temperature sensor (24) for detecting an ambient temperature of the indoor unit (200).
9. The multi-split air conditioning system with three pipes without defrosting shutdown as claimed in claim 1, wherein any of the indoor units (200) further comprises an indoor unit heat exchanger middle temperature sensor (25) for detecting the temperature of the middle of the indoor unit heat exchanger (21).
10. The multi-split air conditioning system without stop of defrosting of claim 1, wherein any of the indoor units (200) further comprises an indoor unit heat exchanger outlet temperature sensor (26) for detecting an indoor unit heat exchanger (21) outlet temperature.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110482210.9A CN113154731A (en) | 2021-04-30 | 2021-04-30 | Three-pipe multi-split air conditioning system without defrosting shutdown |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110482210.9A CN113154731A (en) | 2021-04-30 | 2021-04-30 | Three-pipe multi-split air conditioning system without defrosting shutdown |
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| CN113154731A true CN113154731A (en) | 2021-07-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114777218A (en) * | 2022-03-28 | 2022-07-22 | 广东开利暖通空调股份有限公司 | Multi-split system and control method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103123147A (en) * | 2013-03-27 | 2013-05-29 | 宁波奥克斯空调有限公司 | Variable refrigerant flow air conditioning system and control method thereof |
| CN203385256U (en) * | 2013-06-17 | 2014-01-08 | 南京天加空调设备有限公司 | Multi-split air conditioner parallel connection module system for defrosting without shutdown |
| CN103673438A (en) * | 2012-09-20 | 2014-03-26 | 广东美的暖通设备有限公司 | Sustainable heating multi-connected air-conditioner and defrosting method thereof |
| CN104748464A (en) * | 2013-12-25 | 2015-07-01 | 珠海格力电器股份有限公司 | Multiple on-line defrosting method and device of air conditioning system and air conditioner |
| CN112594824A (en) * | 2021-01-25 | 2021-04-02 | 广东积微科技有限公司 | Non-stop defrosting multi-online hot water system and control method thereof |
-
2021
- 2021-04-30 CN CN202110482210.9A patent/CN113154731A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103673438A (en) * | 2012-09-20 | 2014-03-26 | 广东美的暖通设备有限公司 | Sustainable heating multi-connected air-conditioner and defrosting method thereof |
| CN103123147A (en) * | 2013-03-27 | 2013-05-29 | 宁波奥克斯空调有限公司 | Variable refrigerant flow air conditioning system and control method thereof |
| CN203385256U (en) * | 2013-06-17 | 2014-01-08 | 南京天加空调设备有限公司 | Multi-split air conditioner parallel connection module system for defrosting without shutdown |
| CN104748464A (en) * | 2013-12-25 | 2015-07-01 | 珠海格力电器股份有限公司 | Multiple on-line defrosting method and device of air conditioning system and air conditioner |
| CN112594824A (en) * | 2021-01-25 | 2021-04-02 | 广东积微科技有限公司 | Non-stop defrosting multi-online hot water system and control method thereof |
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| CN114777218A (en) * | 2022-03-28 | 2022-07-22 | 广东开利暖通空调股份有限公司 | Multi-split system and control method |
| EP4253874A1 (en) * | 2022-03-28 | 2023-10-04 | Guangdong Carrier HVAC Co., Ltd. | Variable refrigerant flow system and control method |
| CN114777218B (en) * | 2022-03-28 | 2023-12-22 | 广东开利暖通空调股份有限公司 | Multi-split system and control method |
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