CN202885329U - Air-conditioning system - Google Patents

Air-conditioning system Download PDF

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Publication number
CN202885329U
CN202885329U CN 201220330525 CN201220330525U CN202885329U CN 202885329 U CN202885329 U CN 202885329U CN 201220330525 CN201220330525 CN 201220330525 CN 201220330525 U CN201220330525 U CN 201220330525U CN 202885329 U CN202885329 U CN 202885329U
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CN
China
Prior art keywords
air
conditioning
refrigerant
premises station
indoor
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Active
Application number
CN 201220330525
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Chinese (zh)
Inventor
岳宝
王三辉
唐亚林
黎文斗
张智
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Midea Group Co Ltd
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Guangdong Midea Electric Appliances Co Ltd
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Priority to CN 201220330525 priority Critical patent/CN202885329U/en
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Abstract

The utility model discloses an air-conditioning system. The air-conditioning system comprises a compressor, a four-way valve, an outdoor unit, an indoor unit and a throttling device, and the compressor, the four-way valve, the outdoor unit, the indoor unit and the throttling device are connected in sequence. The four-way valve is connected with an air exhaust pipe of the compressor, the outdoor unit is connected with an outdoor connecting pipe of the four-way valve, the indoor unit is connected with an indoor unit of the four-way valve, and the throttling device is connected between the indoor unit and the outdoor unit. The air-conditioning system further comprises a refrigerant heating device which is arranged between the throttling unit and the outdoor unit and used for heating a refrigerant when the air-conditioning system conducts heating. When the outdoor temperature is low, the refrigerant with low temperature and low pressure in the outdoor unit does not needs too low temperature to absorb heat in the outdoor air, and therefore heating capability of the air-conditioning system is effectively improved.

Description

Air-conditioning system
Technical field
The utility model relates to air-conditioning technical field, relates in particular to a kind of air-conditioning system.
Background technology
Traditional air-conditioning system generally includes the assemblies such as compressor, cross valve, off-premises station, indoor set and throttling arrangement.These assemblies are cascaded by pipe arrangement, pass through the driven compressor refrigerant circulation in system.Refrigerant circulates in internal system, and realizes heat exchange between refrigerant and the air by the heat exchanger of indoor set and off-premises station.
As shown in Figure 1, Fig. 1 is the structural representation of air-conditioning system in the prior art.Wherein, when cross valve 2 be connected to shown in the dotted line time, refrigerant from compressor 1 out after successively through getting back to compressor 1 behind cross valve 2, off-premises station 3, throttling arrangement 5 and the indoor set 4, be high-temperature high-pressure state at off-premises station 3 place's refrigerants, to the outdoor air heat release, be low-temperature condition at indoor set 4 place's refrigerants, by indoor set 4 cooling room airs, thereby reach the purpose of refrigeration; And when cross valve 2 be connected to shown in the solid line time, the refrigerant of HTHP passes through cross valve 2 and indoor set 4 from compressor 1 after out successively, the refrigerant of HTHP is in indoor set 4 interior condensation heat releases, and by the heat exchanger of indoor set 4 heat is spilt in the room air, thereby reach the purpose that heats.Liquid refrigerants through the indoor set condensation continues to be become the two-phase refrigerant of low-temp low-pressure to enter off-premises station 3 and evaporation endothermic by throttling arrangement 5 by throttling, returns compressor 1.
When heating, the temperature that enters into the two-phase refrigerant in the off-premises station 3 need to be lower than outside air temperature just might realize the purpose of absorbing heat.When outdoor temperature is low, refrigerant temperature will be lower than zero degree, like this after operation after a while, and will frosting on the heat exchanger of off-premises station 3, and the heat exchanger heat transfer effect descends and further causes the refrigerant temperatures in the off-premises station 3 to reduce after the frosting, accelerates the frosting process.To sharply reduce the heating capacity of air-conditioning system when frosting acquires a certain degree, just need to defrost to off-premises station 3 this moment.And being connection with cross valve 2, traditional Defrost mode is transformed to shown in the dotted line, to directly lead to off-premises station 3 from the outlet HTHP refrigerant out of compressor 1 and realize the defrost effects, again the connection of cross valve 2 will be transformed to the normal heating mode shown in the solid line after waiting defrost to finish.
Therefore, in the process of defrosting, the refrigerant temperatures in the indoor set 4 are low-temp low-pressure refrigerants, not only can not continue to provide heat for indoor, on the contrary may be from indoor absorbing heat; And because outdoor temperature is lower, heating capacity is lower, but the heat of indoor needs is larger on the contrary, thereby causes existing air-conditioning when outdoor temperature is low, often can not reach indoor heat requirement, and can reduce the problem of indoor temperature when defrosting.
The utility model content
Main purpose of the present utility model provides a kind of air-conditioning system, is intended to promote the heating capacity of air-conditioning system, and can overcome the problem that indoor temperature reduces when defrosting.
A kind of air-conditioning system that the utility model provides, comprise the compressor, cross valve, off-premises station, indoor set and the throttling arrangement that connect successively, described cross valve is connected with the blast pipe of described compressor, described off-premises station is taken over the off-premises station of described cross valve and is connected, described indoor set is taken over the indoor set of described cross valve and is connected, described throttling arrangement is connected between described indoor set and the off-premises station, and air-conditioning system also comprises and is arranged between described throttling arrangement and the described off-premises station, is used for the refrigerant heater that when air-conditioning system heats refrigerant heated.
Preferably, described refrigerant heater is connected in parallel between the air intake duct of the refrigerant exit of described off-premises station when air-conditioning system is in heating mode and described compressor.
Preferably, described refrigerant heater is connected between the refrigerant entrance of the refrigerant exit of described throttling arrangement when air-conditioning system is in heating mode and off-premises station.
Preferably, also air-conditioning system comprises for the bypass solenoid valve of refrigerant being introduced described off-premises station when air-conditioning system defrosts.
Preferably, described bypass solenoid valve is connected in parallel on the blast pipe of described compressor and when air-conditioning system is in heating mode between the refrigerant exit of described throttling arrangement.
Preferably, described bypass solenoid valve is connected in parallel between the refrigerant entrance and refrigerant exit of described throttling arrangement when air-conditioning system is in heating mode.
Preferably, when air-conditioning system is in the mode of operation that heats, if outdoor temperature is lower than default open temp, open described refrigerant heater.
Preferably, when air-conditioning system defrosted, its mode of operation increased the heating power of described refrigerant heater for heating, and closes the blower fan of described off-premises station, reduces the fan delivery of described indoor set, opens described bypass solenoid valve.
Preferably, after the air-conditioning system defrosting is finished, reduce the heating power of described refrigerant heater, close described bypass solenoid valve, open the blower fan of described off-premises station, increase the fan delivery of described indoor set.
The utility model is by arranging a refrigerant heater between throttling arrangement and off-premises station, and be under the mode of operation that heats when air-conditioning system, and be lower than set when being used for open temp that control refrigerant heater opens in outdoor temperature, just open this refrigerant heater refrigerant is heated, but and its power variation with temperature is regulated.Like this, when outdoor temperature was low, the refrigerant of the low-temp low-pressure in the off-premises station did not need too low temperature, just can be from outdoor air absorbing heat, thereby enough heating capacities that effectively promotes air-conditioning system.
Description of drawings
Fig. 1 is the structural representation of air-conditioning system in the prior art;
Fig. 2 is the structural representation of the utility model air-conditioning system one embodiment;
Fig. 3 is the structural representation of the another kind of connected mode of refrigerant heater in the utility model air-conditioning system;
Fig. 4 is the structural representation of another embodiment of the utility model air-conditioning system;
Fig. 5 is the structural representation of the another embodiment of the utility model air-conditioning system.
The realization of the utility model purpose, functional characteristics and advantage are described further with reference to accompanying drawing in connection with embodiment.
The specific embodiment
Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
With reference to Fig. 2 and Fig. 3, Fig. 2 is the structural representation of the utility model air-conditioning system one embodiment; Fig. 3 is the structural representation of the another kind of connected mode of refrigerant heater in the utility model air-conditioning system.
In the present embodiment, air-conditioning system comprises compressor 10, cross valve 20, off-premises station 30, indoor set 40 and the throttling arrangement 50 that connects successively, connects by the mode of connecting.Wherein, cross valve 20 is connected with the blast pipe of compressor 10, and the off-premises station of this cross valve 20 is taken over and is connected with off-premises station 30, and indoor set is taken over and is connected with indoor set 40, and throttling arrangement 50 is connected between off-premises station 30 and the indoor set 40.The air-conditioning system that present embodiment provides comprises that also one is arranged on the refrigerant heater 60 between throttling arrangement 50 and the off-premises station 30, and this refrigerant heater 60 is used for when air-conditioning system heats refrigerant being heated.
When air-conditioning system is in the mode of operation that heats, the refrigerant of HTHP flows out from the blast pipe of compressor 10, through cross valve 20, flow in the indoor set 40, the refrigerant of HTHP is the condensation heat release in indoor set 40, and the heat exchanger 41 by indoor set 40 will carry out with the refrigerant of HTHP dissipation of heat after the heat exchange in room air; Continue by throttling arrangement 50 through indoor set 40 condensed liquid refrigerants, be the two-phase refrigerant of low-temp low-pressure by throttling, then enter off-premises station 30, heat exchanger 31 by off-premises station 30, heat in pervaporation and absorption chamber outer air, the final again air intake duct by compressor 10 returns compressor 10.Thereby reach the purpose that heats.
Because the two-phase refrigerant of low-temp low-pressure needs the heat in the absorption chamber outer air in off-premises station 30, and outdoor temperature is lower, the heat of indoor demand is larger, so the heat that the two-phase refrigerant of low-temp low-pressure need to absorb is also more.At this moment, can preset one and be used for the open temp that control refrigerant heater 60 opens, namely when outdoor temperature was lower than this open temp, the refrigerant of opening 60 pairs of low-temp low-pressures of refrigerant heater heated, in the present embodiment, this open temp can be set to 5 degrees centigrade; And, along with the variation of outdoor temperature, can adjust the heating power of refrigerant heater 60, temperature is lower, and the heating power of this refrigerant heater 60 then needs larger.
The utility model is by arranging a refrigerant heater 60 between throttling arrangement 50 and off-premises station 30, and be under the mode of operation that heats when air-conditioning system, and be lower than set when being used for open temp that control refrigerant heater 60 opens in outdoor temperature, just open 60 pairs of refrigerant heating of this refrigerant heater, but and its power variation with temperature is regulated.Like this, when outdoor temperature was low, the refrigerant of the low-temp low-pressure in the off-premises station 30 did not need too low temperature, just can be from outdoor air absorbing heat, thereby enough heating capacities that effectively promotes air-conditioning system.
In the above-described embodiments, refrigerant heater 60 can be connected in parallel between the air intake duct of the refrigerant exit of off-premises station 30 when air-conditioning system is in heating mode and compressor 10.When the refrigerant heat in the absorption chamber outer air in off-premises station 30 through the low-temp low-pressure after throttling arrangement 50 throttlings, and when flowing out from the refrigerant exit of off-premises station, heat by 60 pairs of refrigerants of refrigerant heater, its temperature is raise get back in the compressor 10 by the air intake duct of compressor 10 afterwards.
Adopt this connected mode, can further effectively promote the heating capacity of air-conditioning system when outdoor temperature is low.
In the above-described embodiments, as shown in Figure 3, refrigerant heater 60 can also be connected between the refrigerant entrance of the refrigerant exit of throttling arrangement 50 when air-conditioning system is in heating mode and off-premises station 30.When refrigerant through throttling arrangement 50 throttlings and after forming the refrigerant of low-temp low-pressure, when the refrigerant exit from throttling arrangement 50 flows out, heat by 60 pairs of refrigerants of refrigerant heater, refrigerant entrance by off-premises station 30 after its temperature is raise enters into off-premises station 30, then the heat of absorption chamber outer space in off-premises station 30.
Adopt this connected mode, when guaranteeing to promote the heating capacity of air-conditioning system when outdoor temperature is low, can reduce refrigerant heater 60 interior refrigerant crushings to the impact of system's heating capacity.
In the above-described embodiments, the aperture of throttling arrangement 50 can be regulated.When air-conditioning system in when defrosting, cross valve remains on the indoor heating state, at this moment, adopt following order to finish the operation of defrosting: the heating power that increases refrigerant heater 60, close the blower fan 31 of off-premises station 30, reduce the fan delivery of indoor set 40, tune up the aperture of throttling arrangement 50.In the process of defrosting, the refrigerant of the HTHP of discharging from the blast pipe of compressor 10 reaches the refrigerant entrance of throttling arrangement 50 more first by indoor set 40.Because this moment, the aperture of throttling arrangement was larger, and the refrigerant that passes through is not had restriction effect, so still have certain temperature through the refrigerant of throttling arrangement 50, entered into off-premises station 30 and defrosted.After defrosting is finished, at first reduce the heating power of refrigerant heater 60, regulate the aperture of stream device 50 to suitably big or small, then open the blower fan 31 of off-premises station 30, heighten the fan delivery of indoor set 40.
When air-conditioning system in when defrosting, by tuning up the aperture of throttling arrangement 50, so that its refrigerant to the HTHP of process does not have restriction effect, and the refrigerant of HTHP at first can through indoor set 40 and with dissipation of heat to room air, then just can directly enter into off-premises station 30 via throttling arrangement 50 and defrost.Like this, in the process for the air-conditioning system defrosting, can guarantee the indoor heating effect simultaneously.
Referring again to Fig. 2, simultaneously with reference to Fig. 4, Fig. 4 is the structural representation of another embodiment of the utility model air-conditioning system.
On the basis of above-described embodiment, air-conditioning system also comprises for the bypass solenoid valve 70 of refrigerant being introduced off-premises station 30 when air-conditioning system defrosts, and 70 of bypass solenoid valves are opened during in defrosting in air-conditioning system, then do not open when air-conditioning system is normally moved.
In the present embodiment, when refrigerant heater 60 is connected in parallel between the air intake duct of the refrigerant exit of off-premises station 30 when air-conditioning system is in heating mode and compressor 10, and bypass solenoid valve 70 is connected in parallel on the blast pipe of compressor 10 and when air-conditioning system is in heating mode between the refrigerant exit of throttling arrangement 50.
When air-conditioning system defrosted, its mode of operation at this moment, adopted following order to finish for heating: increase the heating power of refrigerant heater 60, close the blower fan 31 of off-premises station 30, reduce the fan delivery of indoor set 40, open bypass solenoid valve 70.After opening bypass solenoid valve 70, the refrigerant of the HTHP that flows out from the blast pipe of compressor 10, most of meeting directly enter into off-premises station 30 by bypass solenoid valve 70 and defrost, and still have the fraction refrigerant can flow through indoor set 40, through after the heat exchanger heat exchange of indoor set 40 with dissipation of heat in room air.After defrosting is finished, at first reduce the heating power of refrigerant heater 60, close bypass solenoid valve 70, then open the blower fan 31 of off-premises station 30, heighten the fan delivery of indoor set 40.
In the above-described embodiments, when refrigerant heater 60 was connected in parallel between the air intake duct of the refrigerant exit of off-premises station 30 when air-conditioning system is in heating mode and compressor 10, bypass solenoid valve 70 can also be connected in parallel between the refrigerant entrance and refrigerant exit of throttling arrangement 50 when air-conditioning system is in heating mode.
When air-conditioning system defrosted, its mode of operation at this moment, adopted following order to finish for heating: increase the heating power of refrigerant heater 60, close the blower fan 31 of off-premises station 30, reduce the fan delivery of indoor set 40, open bypass solenoid valve 70.The refrigerant of the HTHP that flows out from the blast pipe of compressor 10 can pass through first indoor set 40, passes through after the heat exchanger heat exchange dissipation of heat in room air.And then the refrigerant entrance of arrival throttling arrangement 50; And because bypass solenoid valve 70 is in parallel with throttling arrangement 50, after bypass solenoid valve 70 was opened, most of refrigerant can pass through bypass solenoid valve 70, did not pass through throttling arrangement 50, and this a part of refrigerant then still keeps certain temperature, enters off-premises station 30 and defrosts.After defrosting is finished, at first reduce the heating power of refrigerant heater 60, close bypass solenoid valve 70, then open the blower fan 31 of off-premises station 30, heighten the fan delivery of indoor set 40.
Bypass solenoid valve 70 is set in air-conditioning system, and it is connected in parallel on the blast pipe of compressor 10 and when air-conditioning system is in heating mode, between the refrigerant exit of throttling arrangement 50, perhaps is connected in parallel between the refrigerant entrance and refrigerant exit of throttling arrangement 50 when air-conditioning system is in heating mode.After opening bypass solenoid valve 70, the refrigerant of HTHP can directly enter into off-premises station 30 through bypass solenoid valve 70 and defrost.Like this, just can further guarantee in the process for the air-conditioning system defrosting, to guarantee simultaneously the indoor heating effect.
Referring again to Fig. 3, simultaneously with reference to Fig. 5, Fig. 5 is the structural representation of the another embodiment of the utility model air-conditioning system.
In the present embodiment, when refrigerant heater 60 was connected between the refrigerant entrance of the refrigerant exit of throttling arrangement 50 when air-conditioning system is in heating mode and off-premises station 30, bypass solenoid valve 70 was connected in parallel on the blast pipe of compressor 10 and when air-conditioning system is in heating mode between the refrigerant exit of throttling arrangement 50.
Go out as shown in Figure 5, when refrigerant heater 60 was connected between the refrigerant entrance of the refrigerant exit of throttling arrangement 50 when air-conditioning system is in heating mode and off-premises station 30, bypass solenoid valve 70 can also be connected in parallel between the refrigerant entrance and refrigerant exit of throttling arrangement 50 when air-conditioning system is in heating mode.
More than two kinds of connected modes, the operating procedure after its defrost process and defrosting are finished is all same as the previously described embodiments, does not do at this and gives unnecessary details.
The above only is preferred embodiment of the present utility model; be not so limit claim of the present utility model; every equivalent structure transformation that utilizes the utility model specification and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present utility model.

Claims (9)

1. air-conditioning system, comprise the compressor, cross valve, off-premises station, indoor set and the throttling arrangement that connect successively, described cross valve is connected with the blast pipe of described compressor, described off-premises station is taken over the off-premises station of described cross valve and is connected, described indoor set is taken over the indoor set of described cross valve and is connected, described throttling arrangement is connected between described indoor set and the off-premises station, it is characterized in that, also comprise being arranged between described throttling arrangement and the described off-premises station, being used for the refrigerant heater that when air-conditioning system heats, refrigerant heated.
2. air-conditioning system as claimed in claim 1 is characterized in that, described refrigerant heater is connected in parallel between the air intake duct of the refrigerant exit of described off-premises station when air-conditioning system is in heating mode and described compressor.
3. air-conditioning system as claimed in claim 1 is characterized in that, described refrigerant heater is connected between the refrigerant entrance of the refrigerant exit of described throttling arrangement when air-conditioning system is in heating mode and off-premises station.
4. air-conditioning system as claimed in claim 1 is characterized in that, also comprises for the bypass solenoid valve of refrigerant being introduced described off-premises station when air-conditioning system defrosts.
5. air-conditioning system as claimed in claim 4 is characterized in that, described bypass solenoid valve is connected in parallel on the blast pipe of described compressor and when air-conditioning system is in heating mode between the refrigerant exit of described throttling arrangement.
6. air-conditioning system as claimed in claim 4 is characterized in that, described bypass solenoid valve is connected in parallel between the refrigerant entrance and refrigerant exit of described throttling arrangement when air-conditioning system is in heating mode.
7. such as each described air-conditioning system in the claim 1 to 6, it is characterized in that, when air-conditioning system is in the mode of operation that heats, if outdoor temperature is lower than default open temp, open described refrigerant heater.
8. air-conditioning system as claimed in claim 7 is characterized in that, when air-conditioning system defrosts, its mode of operation increases the heating power of described refrigerant heater for heating, and closes the blower fan of described off-premises station, reduce the fan delivery of described indoor set, open described bypass solenoid valve.
9. air-conditioning system as claimed in claim 8 is characterized in that, after the air-conditioning system defrosting is finished, reduces the heating power of described refrigerant heater, closes described bypass solenoid valve, opens the blower fan of described off-premises station, increases the fan delivery of described indoor set.
CN 201220330525 2012-07-09 2012-07-09 Air-conditioning system Active CN202885329U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105004001A (en) * 2015-06-30 2015-10-28 广东美的制冷设备有限公司 Air conditioner and refrigeration method
CN105928266A (en) * 2016-05-23 2016-09-07 广东美的暖通设备有限公司 Multi-online system and control method for heating and throttling element of multi-online system
CN106152642A (en) * 2016-07-11 2016-11-23 珠海格力电器股份有限公司 Air-conditioner reverse circulation defrosting control method
CN107101275A (en) * 2017-06-01 2017-08-29 青岛海尔空调器有限总公司 A kind of air conditioner and its control method
CN110836551A (en) * 2019-11-13 2020-02-25 广东美的暖通设备有限公司 Heat pump system and control method for heat pump system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105004001A (en) * 2015-06-30 2015-10-28 广东美的制冷设备有限公司 Air conditioner and refrigeration method
CN105928266A (en) * 2016-05-23 2016-09-07 广东美的暖通设备有限公司 Multi-online system and control method for heating and throttling element of multi-online system
CN106152642A (en) * 2016-07-11 2016-11-23 珠海格力电器股份有限公司 Air-conditioner reverse circulation defrosting control method
CN107101275A (en) * 2017-06-01 2017-08-29 青岛海尔空调器有限总公司 A kind of air conditioner and its control method
CN110836551A (en) * 2019-11-13 2020-02-25 广东美的暖通设备有限公司 Heat pump system and control method for heat pump system

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C14 Grant of patent or utility model
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Effective date of registration: 20131209

Address after: 528311 Guangdong, Foshan, Beijiao, the United States, the United States and the United States on the avenue of the United States, the headquarters of the United States building B floor, District, 26-28

Patentee after: Midea Group Co., Ltd.

Address before: 528311 Beijiao, Foshan, Shunde District, the town of Guangdong, the United States Avenue, No. 6

Patentee before: Meidi Electric Appliances Co., Ltd., Guangdong

ASS Succession or assignment of patent right

Owner name: MIDEA GROUP CO., LTD.

Free format text: FORMER OWNER: MEIDI ELECTRIC APPLIANCES CO., LTD., GUANGDONG

Effective date: 20131209

C41 Transfer of patent application or patent right or utility model