CN203908148U - Air conditioning system - Google Patents

Air conditioning system Download PDF

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Publication number
CN203908148U
CN203908148U CN201420316943.0U CN201420316943U CN203908148U CN 203908148 U CN203908148 U CN 203908148U CN 201420316943 U CN201420316943 U CN 201420316943U CN 203908148 U CN203908148 U CN 203908148U
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China
Prior art keywords
heat exchanger
outdoor heat
conditioning system
compressor
air
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Application number
CN201420316943.0U
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Chinese (zh)
Inventor
刘钢
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Midea Group Co Ltd
GD Midea Air Conditioning Equipment Co Ltd
Original Assignee
Midea Group Co Ltd
Guangdong Midea Refrigeration Equipment Co Ltd
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Priority to CN201420316943.0U priority Critical patent/CN203908148U/en
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Abstract

The utility model discloses an air conditioning system which comprises a compressor, a four-way valve, an outdoor heat exchanger, a throttling device and an indoor heat exchanger. The compressor, the four-way valve, the outdoor heat exchanger, the throttling device and the indoor heat exchanger are connected through connection pipes. An air suction pipe of the four-way valve is connected with an exhaust pipe of the compressor, an outdoor unit connection pipe of the four-way valve is connected with an inlet pipe of the outdoor heat exchanger, an indoor unit connection pipe of the four-way valve is connected with an outlet pipe of the indoor heat exchanger, an exhaust pipe of the four-way valve is connected with an air return pipe of the compressor, the throttling device is connected between an outlet pipe of the outdoor heat exchanger and an inlet pipe of the indoor heat exchanger, a temperature sensor is disposed in the outdoor heat exchanger, a bypass valve is connected between the exhaust pipe of the compressor and the outlet pipe of the outdoor heat exchanger, and the bypass valve is started when temperature detected by the temperature sensor is smaller than or equal to a preset temperature value. According to the air conditioning system, the outdoor heat exchanger can be prevented from frosting during heating of the air conditioning system in a low-temperature environment, performance of the air conditioning system is improved, comfort of users is improved, and the service life of the air conditioning system is prolonged.

Description

Air-conditioning system
Technical field
The utility model relates to technical field of refrigeration equipment, relates in particular to a kind of air-conditioning system.
Background technology
Heat pump air conditioner can meet user's warming demand, yet because heat pump air conditioner is in the situation that environment temperature is lower during heating operation, on outdoor heat exchanger, just having frost generates, along with the continuous increase of frost will be stopped up outdoor heat exchanger and extraneous heat exchange, cause the heating capacity of heat pump air conditioner sharply to decline, therefore under heat pump air conditioner cryogenic conditions, heating operation, after a period of time, will carry out special defrosting.At present, air-conditioning system defrosting is to adopt refrigeration mode defrost, its principle is: temperature sensor during heating operation on outdoor heat exchanger detects while having frost generate on outdoor heat exchanger, the high-temperature gas that commutation by cross valve the is discharged compressor outdoor heat exchanger of flowing through, cover the frost on outdoor heat exchanger, because outdoor heat exchange actuator temperature raises, slowly frost be melted into water and slide in the drip tray of air-conditioning system along the fin of outdoor heat exchanger, thereby completing defrosting.But in this process, the high-temperature gas of discharging from compressor can be condensed into rapidly liquid after cold conditions outdoor heat exchanger, and too much liquid refrigerants returns to the liquid hammer that compressor will certainly cause compressor, and compressor performance and life-span are exerted an influence.Meanwhile, during refrigeration mode defrosting, fan shuts down, and the moment decline of air outlet surrounding space temperature, has a strong impact on the comfortableness that user uses.And while again entering heating operation after defrost finishes, compressor need repeat to shut down and opening process, so reciprocal start and stop will be shortened the service life of compressor and cross valve.
Utility model content
Main purpose of the present utility model is to be to avoid air-conditioning system outdoor heat exchanger frosting during heating operation under low temperature environment, improves Performance for Air Conditioning Systems and user's comfortableness, extends the life-span of air-conditioning system.
In order to achieve the above object, the utility model provides a kind of air-conditioning system, and this air-conditioning system comprises compressor, cross valve, outdoor heat exchanger, throttling arrangement and the indoor heat exchanger connecting by tube connector; The air intake duct of described cross valve is connected with the blast pipe of described compressor, the off-premises station of described cross valve is taken over and is connected with the inlet tube of described outdoor heat exchanger, the indoor set of described cross valve is taken over and is connected with the outlet of described indoor heat exchanger, the blast pipe of described cross valve is connected with the muffler of described compressor, and described throttling arrangement is connected between the outlet of described outdoor heat exchanger and the inlet tube of described indoor heat exchanger; In described outdoor heat exchanger, be provided with temperature sensor, between the blast pipe of described compressor and the outlet of described outdoor heat exchanger, be connected with by-passing valve, when the temperature that described by-passing valve detects at described temperature sensor is less than or equal to preset temperature value, open.
Preferably, described preset temperature value is 1 ℃.
Preferably, between the muffler of described compressor and the inlet tube of described outdoor heat exchanger, be provided with heater.
Preferably, described heater is sheathed on the tube connector between the blast pipe of described cross valve and the muffler of described compressor.
Preferably, described heater is the heat tape being wound on described tube connector.
Preferably, described heater starts when described by-passing valve is opened.
Preferably, on described outdoor heat exchanger, be provided with the hydrophily fin of the water introducing air-conditioning system drip tray for described outdoor heat exchanger is discharged.
The air-conditioning system that the utility model provides, by between the blast pipe at compressor and the outlet of described outdoor heat exchanger, by-passing valve being set, and the temperature that detects at the temperature sensor of outdoor heat exchanger of this by-passing valve is opened while being less than or equal to preset temperature value.Thereby air-conditioning system is heating operation under low temperature environment, and when the temperature that the temperature sensor of outdoor heat exchanger detects is less than or equal to preset temperature value, by-passing valve is opened, the refrigerant that compressor is discharged is divided into two-way and circulates, and a curb cross valve, indoor heat exchanger, throttling arrangement, outdoor heat exchanger are got back in compressor; Another curb by-passing valve, outdoor heat exchanger are got back in compressor.In the HTHP gaseous coolant of discharging due to compressor, a part is directly by the by-passing valve outdoor heat exchanger of flowing through, the temperature of outdoor heat exchanger is raise, avoid outdoor heat exchanger frosting because environment temperature is low, guaranteed that air-conditioning system continues heating operation simultaneously, thereby can improve Performance for Air Conditioning Systems and user's comfortableness, extend the life-span of air-conditioning system.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model air-conditioning system preferred embodiment.
The realization of the purpose of this utility model, functional characteristics and advantage, in connection with embodiment, and is described further with reference to accompanying drawing.
The specific embodiment
Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
With reference to Fig. 1, Fig. 1 is the structural representation of the utility model air-conditioning system preferred embodiment.
In the utility model preferred embodiment, air-conditioning system comprises compressor 10, cross valve 20, outdoor heat exchanger 30, throttling arrangement 40 and the indoor heat exchanger 50 connecting by tube connector (as copper pipe); The air intake duct 21 of cross valve 20 is connected with the blast pipe 11 of compressor 10, the off-premises station of cross valve 20 is taken over 22 and is connected with the inlet tube 31 of outdoor heat exchanger 30, the indoor set of cross valve 20 is taken over 23 and is connected with the outlet 52 of indoor heat exchanger 50, the blast pipe 24 of cross valve 20 is connected with the muffler 12 of compressor 10, and throttling arrangement 40 is connected between the outlet 32 of outdoor heat exchanger 30 and the inlet tube 51 of indoor heat exchanger 50; In outdoor heat exchanger 30, be provided with temperature sensor (not shown), between the blast pipe 11 of compressor 10 and the outlet 32 of outdoor heat exchanger 30, be connected with by-passing valve 60, when the temperature that by-passing valve 60 detects at temperature sensor is less than or equal to preset temperature value, open.
In the present embodiment, when air-conditioning system refrigerating operaton, the air intake duct 21 of cross valve 20 is taken over 22 with the off-premises station of cross valve 20 and is communicated, and the indoor set of cross valve 20 is taken over 23 and communicated with the blast pipe 24 of cross valve 20.
When air-conditioning system refrigerating operaton, compressor 10 is discharged HTHP gaseous coolant to the air intake duct 21 of cross valve 20 by its blast pipe 11, the flow through air intake duct 21 of cross valve 20 of this HTHP gaseous coolant, the off-premises station of cross valve 20 is taken over after 22 the inlet tube 31 flowed into chamber external heat exchangers 30 through outdoor heat exchanger 30, after outdoor heat exchanger 30 is cooling, again from the outlet 32 of outdoor heat exchanger 30 flow out and throttling arrangement 40 decompressions of flowing through become low-temp low-pressure liquid refrigerants, this low-temp low-pressure liquid refrigerants flows to indoor heat exchanger 50 by the inlet tube 51 of indoor heat exchanger 50, in indoor heat exchanger 50, after heat absorption evaporation, becoming gaseous coolant flows out from the outlet 52 of indoor heat exchanger 50, and take over 23 from the flow through indoor set of cross valve 20 of the gaseous coolant that the outlet 52 of indoor heat exchanger 50 flows out, the blast pipe 24 of cross valve 20, after the muffler 12 of compressor 10, flow in the fluid reservoir (not shown) of compressor 10, complete kind of refrigeration cycle.
When air-conditioning system heating operation, the air intake duct 21 of cross valve 20 is taken over 23 with the indoor set of cross valve 20 and is communicated, and the off-premises station of cross valve 20 is taken over 22 and communicated with the blast pipe 24 of cross valve 20; Correspondingly, contrary with refrigeration mode, now in Fig. 1, the inlet tube 51 of indoor heat exchanger 50 is as outlet, and the outlet 52 of indoor heat exchanger 50 is as inlet tube, the inlet tube 31 of outdoor heat exchanger 30 is as outlet, and the outlet 32 of outdoor heat exchanger 30 is as inlet tube.
When air-conditioning system is at normal temperatures during heating operation, compressor 10 is discharged HTHP gaseous coolant to the air intake duct 21 of cross valve 20 by its blast pipe 11, the flow through air intake duct 21 of cross valve 20 of HTHP gaseous coolant, the indoor set of cross valve 20 is taken over the outlet 52 through indoor heat exchanger 50 after 23 and is flow to indoor heat exchanger 50, after indoor heat exchanger 50 is cooling, flow through again after throttling arrangement 40 reduces pressure and become low-temp low-pressure liquid refrigerants, this low-temp low-pressure liquid refrigerants is by the outlet 32 flowed into chamber external heat exchangers 30 of outdoor heat exchanger 30, in outdoor heat exchanger 30, after heat absorption evaporation, becoming gaseous coolant flows out from the inlet tube 31 of outdoor heat exchanger 30, and take over 22 from the flow through off-premises station of cross valve 20 of the gaseous coolant that the inlet tube 31 of outdoor heat exchanger 30 flows out, the blast pipe 24 of cross valve 20, after the muffler 12 of compressor 10, flow in the fluid reservoir of compressor 10, complete the circulation that heats under normal temperature.
When air-conditioning system heating operation under low temperature environment, and the temperature that detects of the temperature sensor of outdoor heat exchanger 30 is while being less than or equal to preset temperature value, and by-passing valve 60 is opened.Conventionally, air-conditioning system is under low temperature environment in heating process, and the temperature of outdoor heat exchanger 30 is during lower than 0 ℃, and outdoor heat exchanger 30 can frostings, and environment temperature is when more low humidity is larger, generates frost frost faster and generation many on outdoor heat exchanger 30.The present embodiment is to avoid the temperature of outdoor heat exchanger 30 lower than 0 ℃, prevention air-conditioning system is outdoor heat exchanger 30 frostings during heating operation under low temperature environment, above-mentioned preset temperature value is set to 1 ℃, when thereby the temperature detecting when the temperature sensor of external heat exchanger 30 is less than or equal to 1 ℃, by-passing valve 60 is opened.
Air-conditioning system is carried out in low-temperature heating situation, after by-passing valve 60 is opened, the HTHP gaseous coolant of discharging from the blast pipe 11 of compressor 10 is divided into two-way and circulates, the off-premises station adapter 22 of the air intake duct 21 of one curb cross valve 20, the indoor set of cross valve 20 adapter 23, indoor heat exchanger 50, throttling arrangement 40, outdoor heat exchanger 30, cross valve 20, the blast pipe 24 of cross valve 20 are got back in the fluid reservoir of compressor 10, complete the process that heats normally; The off-premises station adapter 22 of another curb by-passing valve 60, outdoor heat exchanger 30, cross valve 20, the blast pipe 24 of cross valve 20 are got back in the fluid reservoir of compressor 10.The HTHP gaseous coolant of discharging due to the blast pipe 11 from compressor 10, a part is through by-passing valve 60 outdoor heat exchanger 30 of flowing through, the temperature of outdoor heat exchanger 30 is raise, be unlikely to lower than 0 ℃, thereby can avoid outdoor heat exchanger 30 frosting because environment temperature is low, simultaneously, due to outdoor heat exchanger 30 frost-free in heating process, make air-conditioning system not need to switch to refrigeration mode and carry out special defrost processing, air-conditioning system can continue to heat, temperature fluctuation during reducing air-conditioning system and heating, thereby can improve Performance for Air Conditioning Systems, also improved user's comfortableness, and compressor 10 does not need to carry out start and stop repeatedly, compressor 10 is not because repeatedly starting and stopping damages, can extend the life-span of air-conditioning system.
With respect to prior art, the air-conditioning system that the utility model provides, by by-passing valve 60 being set between the blast pipe 11 at compressor 10 and the outlet 32 of outdoor heat exchanger 30, can avoid air-conditioning system outdoor heat exchanger 30 frostings during heating operation under low temperature environment, improve Performance for Air Conditioning Systems and user's comfortableness, extend the life-span of air-conditioning system.
In the present embodiment, between the muffler 12 of compressor 10 and the inlet tube 31 of outdoor heat exchanger 30, be provided with heater 70.
In the situation that by-passing valve 60 is opened, the HTHP gaseous coolant that the blast pipe 11 of compressor 10 is discharged is flowed through after outdoor heat exchanger 30 through by-passing valve 60, become rapidly liquid refrigerants, this liquid refrigerants is through turning back in the fluid reservoir of compressor 10 by cross valve 20, when liquid refrigerants in the fluid reservoir that turns back to compressor 10 is too much, will there is " liquid hammer rushes cylinder " phenomenon.The present embodiment arranges heater 70 for heating the liquid refrigerants that flows out and will turn back to the fluid reservoir of compressor 10 from outdoor heat exchanger 30 in the return line of compressor 10, after making this liquid refrigerants be subject to thermal evaporation to become gaseous coolant, turn back to again in the fluid reservoir of compressor 10, reduce the generation of " liquid hammer rushes cylinder " phenomenon, also make more refrigerant participate in and heat in circulation, avoid hoarding and in the fluid reservoir of compressor 10, causing the heating capacity of air-conditioning system to reduce because of liquid refrigerants simultaneously.
Particularly, as shown in Figure 1, heater 70 is sheathed on the tube connector between the blast pipe 24 of cross valve 20 and the muffler 12 of compressor 10.
Heater 70 is arranged on the position near compressor 10, guarantees that liquid refrigerants is become by thermal evaporation to turn back to after gaseous coolant in compressor 10 and no longer changes.
Particularly, heater 70 is for being wound in the heat tape on tube connector.Those skilled in the art are understandable, and heater 70 can also be other heater with heating function, and in like manner, heater 70 not only can be wound in tube connector outer wall, can also be arranged on the arbitrary place of tube connector outer wall.
Further, heater 70 starts when by-passing valve 60 is opened.
When the temperature detecting when the temperature sensor of outdoor heat exchanger 30 is less than or equal to preset temperature value, by-passing valve 60 is opened, and heater 70 also starts to start, to heat turning back to the liquid refrigerants of compressor 10 in time.
In the present embodiment, on outdoor heat exchanger 30, be provided with the hydrophily fin (not shown) of the water introducing air-conditioning system drip tray for outdoor heat exchanger 30 is discharged.The fin of outdoor heat exchanger 30 is hydrophily fin, while making to carry out defrost in the situation that of outdoor heat exchanger 30 frosting, the formed water of outdoor heat exchanger 30 defrost can be slipped to the drip tray of air-conditioning system from hydrophily fin rapidly, avoids too much water droplet to stick to for a long time on outdoor heat exchanger 30.
The foregoing is only preferred embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or conversion of equivalent flow process that utilizes the utility model description and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.

Claims (7)

1. an air-conditioning system, comprises the compressor, cross valve, outdoor heat exchanger, throttling arrangement and the indoor heat exchanger that by tube connector, connect; It is characterized in that, the air intake duct of described cross valve is connected with the blast pipe of described compressor, the off-premises station of described cross valve is taken over and is connected with the inlet tube of described outdoor heat exchanger, the indoor set of described cross valve is taken over and is connected with the outlet of described indoor heat exchanger, the blast pipe of described cross valve is connected with the muffler of described compressor, and described throttling arrangement is connected between the outlet of described outdoor heat exchanger and the inlet tube of described indoor heat exchanger; In described outdoor heat exchanger, be provided with temperature sensor, between the blast pipe of described compressor and the outlet of described outdoor heat exchanger, be connected with by-passing valve, when the temperature that described by-passing valve detects at described temperature sensor is less than or equal to preset temperature value, open.
2. air-conditioning system as claimed in claim 1, is characterized in that, described preset temperature value is 1 ℃.
3. air-conditioning system as claimed in claim 1, is characterized in that, between the muffler of described compressor and the inlet tube of described outdoor heat exchanger, is provided with heater.
4. air-conditioning system as claimed in claim 3, is characterized in that, described heater is sheathed on the tube connector between the blast pipe of described cross valve and the muffler of described compressor.
5. air-conditioning system as claimed in claim 4, is characterized in that, described heater is the heat tape being wound on described tube connector.
6. air-conditioning system as claimed in claim 5, is characterized in that, described heater starts when described by-passing valve is opened.
7. air-conditioning system as claimed in claim 1, is characterized in that, is provided with the hydrophily fin of the water introducing air-conditioning system drip tray for described outdoor heat exchanger is discharged on described outdoor heat exchanger.
CN201420316943.0U 2014-06-13 2014-06-13 Air conditioning system Active CN203908148U (en)

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Application Number Priority Date Filing Date Title
CN201420316943.0U CN203908148U (en) 2014-06-13 2014-06-13 Air conditioning system

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Application Number Priority Date Filing Date Title
CN201420316943.0U CN203908148U (en) 2014-06-13 2014-06-13 Air conditioning system

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104949210A (en) * 2015-07-23 2015-09-30 广东美的暖通设备有限公司 Air conditioning system, air conditioner, and control method for air conditioning system
CN105042936A (en) * 2015-07-02 2015-11-11 合肥美的电冰箱有限公司 Refrigerant circulation system and refrigeration equipment
CN106369891A (en) * 2016-11-03 2017-02-01 珠海格力电器股份有限公司 Air conditioning unit and control method thereof
CN109579383A (en) * 2018-12-10 2019-04-05 广东志高暖通设备股份有限公司 A kind of air-conditioning system with outdoor unit antifrost function
CN114110813A (en) * 2021-11-17 2022-03-01 浙江国祥股份有限公司 Non-frosting air conditioning unit and control method thereof

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105042936A (en) * 2015-07-02 2015-11-11 合肥美的电冰箱有限公司 Refrigerant circulation system and refrigeration equipment
CN104949210A (en) * 2015-07-23 2015-09-30 广东美的暖通设备有限公司 Air conditioning system, air conditioner, and control method for air conditioning system
CN104949210B (en) * 2015-07-23 2018-08-31 广东美的暖通设备有限公司 The control method of air-conditioning system, air conditioner and air-conditioning system
CN106369891A (en) * 2016-11-03 2017-02-01 珠海格力电器股份有限公司 Air conditioning unit and control method thereof
CN106369891B (en) * 2016-11-03 2018-10-19 珠海格力电器股份有限公司 Air-conditioner set and its control method
CN109579383A (en) * 2018-12-10 2019-04-05 广东志高暖通设备股份有限公司 A kind of air-conditioning system with outdoor unit antifrost function
CN114110813A (en) * 2021-11-17 2022-03-01 浙江国祥股份有限公司 Non-frosting air conditioning unit and control method thereof

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