CN203501527U - Air conditioning system - Google Patents

Air conditioning system Download PDF

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Publication number
CN203501527U
CN203501527U CN201320548172.3U CN201320548172U CN203501527U CN 203501527 U CN203501527 U CN 203501527U CN 201320548172 U CN201320548172 U CN 201320548172U CN 203501527 U CN203501527 U CN 203501527U
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CN
China
Prior art keywords
control valve
air
conditioning system
outdoor heat
heat exchanger
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn - After Issue
Application number
CN201320548172.3U
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Chinese (zh)
Inventor
孙先金
熊美兵
马熙华
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.)
Guangdong Midea HVAC Equipment Co Ltd
Original Assignee
Guangdong Midea HVAC Equipment Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Priority to CN201320548172.3U priority Critical patent/CN203501527U/en
Application granted granted Critical
Publication of CN203501527U publication Critical patent/CN203501527U/en
Withdrawn - After Issue legal-status Critical Current
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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, an indoor unit, a gas-liquid separator and a first control valve, wherein the first end of the outdoor heat exchanger is communicated with a port of the outdoor unit; the first control valve is arranged between the first end of the outdoor heat exchanger and the port of the outdoor unit. According to the air conditioning system, the first control valve is arranged between the first end of the outdoor heat exchanger and the port of the outdoor unit, and the flow of the first control valve can be adjusted to reduce a coolant which enters the gas-liquid separator and returns to the compressor within a period of time after the reversing of the four-way valve when a condenser of the outdoor heat exchanger is required to be switched to an evaporator to work by the reversing of the four-way valve, so that the condition of compression of the compressor with liquid when the condenser of the outdoor heat exchanger is switched to the evaporator can be prevented, and the running reliability of the compressor and the system is further improved.

Description

Air-conditioning system
Technical field
The utility model relates to household electrical appliance preparing technical field, more specifically, relates to a kind of air-conditioning system.
Background technology
In air-conditioning system running, because of systematic function requirement, as heating and defrosting exits and heat oil return, exit, outdoor heat exchanger is commutated and need to be become evaporimeter from condenser by cross valve, in a period of time after cross valve commutation, because a large amount of band liquid cooling matchmakers directly get back to gas-liquid separator through evaporimeter, enter compressor return air side, the operation of compressor is produced to very large impact, when serious, can cause compressor band hydraulic compression, even produce liquid hammer, damage compressor.
Air-conditioning system is when low-temperature heating starts, and because environment temperature is low, outdoor evaporator evaporation weak effect, during compressor start, refrigerant in system is difficult to get back to rapidly compressor, causes compressor air suction quantity not sufficient, and low pressure is low, pressure ratio is large, like this for a long time, can reduce the reliability of compressor and system.
Utility model content
The utility model is intended to one of solve the problems of the technologies described above at least to a certain extent.
For this reason, an object of the present utility model is to propose a kind of reliable air-conditioning system.
According to air-conditioning system of the present utility model, comprising: compressor, described compressor is provided with exhaust outlet and gas returning port; Cross valve, described cross valve is provided with exhaust port, return-air port, off-premises station port and indoor set port, and described exhaust port is communicated with the exhaust outlet of described compressor; Outdoor heat exchanger, the first end of described outdoor heat exchanger is communicated with described off-premises station port; Indoor set, described indoor set is communicated with the second end and the described indoor set port of described outdoor heat exchanger; Gas-liquid separator, described gas-liquid separator comprises import and outlet, and described import is communicated with described return-air port, and described outlet is communicated with the gas returning port of described compressor; And first control valve, described the first control valve is located between the first end and described off-premises station port of described outdoor heat exchanger.
According to air-conditioning system of the present utility model, by the first control valve being set between the first end at outdoor heat exchanger and off-premises station port, when outdoor heat exchanger need to commutate when being switched to evaporimeter and carried out work by condenser by cross valve, in a period of time after cross valve commutation, can regulate the flow of the first control valve, making to enter gas-liquid separator, to get back to the refrigerant of compressor less, thereby can prevent that compressor from, in outdoor heat exchanger situation with hydraulic compression when condenser becomes evaporimeter, improving the operational reliability of compressor and system then.
In addition, according to air-conditioning system of the present utility model, can also there is following additional technical characterictic:
According to an embodiment of the present utility model, the aperture of described the first control valve is adjustable.
According to an embodiment of the present utility model, described the first control valve is electric expansion valve.
According to an embodiment of the present utility model, described air-conditioning system also comprises the second control valve, and described the second control valve is located between the first end of described outdoor heat exchanger and described off-premises station port and is connected in parallel with described the first control valve.
According to an embodiment of the present utility model, described the second control valve is magnetic valve.
According to an embodiment of the present utility model, described air-conditioning system also comprises the 3rd control valve, and described the 3rd control valve is located between the first end and the second end of described outdoor heat exchanger.
According to an embodiment of the present utility model, described the 3rd control valve and described the first control valve are connected in series and are connected in parallel with described the second control valve.
According to an embodiment of the present utility model, described the 3rd control valve is magnetic valve.
According to an embodiment of the present utility model, described air-conditioning system comprises at least one compressor, and described compressor is frequency-changeable compressor or digital compressor.
According to an embodiment of the present utility model, described outdoor heat exchanger is two, and two described outdoor heat exchangers are connected in series.
Additional aspect of the present utility model and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present utility model.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present utility model and advantage accompanying drawing below combination obviously and is easily understood becoming the description of embodiment, wherein:
Fig. 1 is a kind of running status schematic diagram according to the air-conditioning system of the utility model embodiment;
Fig. 2 is the another kind of running status schematic diagram according to the air-conditioning system of the utility model embodiment;
Fig. 3 is another the running status schematic diagram according to the air-conditioning system of the utility model embodiment;
Reference numeral:
10: compressor; 11: exhaust outlet; 12: gas returning port;
20: cross valve; 21: exhaust port; 22: return-air port; 23: off-premises station port; 24: indoor set port;
30: outdoor heat exchanger; 31: first end; 32: the second ends;
40: indoor set;
50: gas-liquid separator; 51: import; 52: outlet;
60: the first control valves;
70: the second control valves;
80: the three control valves.
The specific embodiment
Describe embodiment of the present utility model below in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Below by the embodiment being described with reference to the drawings, be exemplary, be intended to for explaining the utility model, and can not be interpreted as restriction of the present utility model.
In description of the present utility model, it will be appreciated that, term " on ", orientation or the position relationship of the indication such as D score, " top ", " end ", " interior ", " outward " be based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, rather than indicate or imply that the device of indication or element must have specific orientation, with specific orientation, construct and operation, therefore can not be interpreted as restriction of the present utility model.In addition, term " first ", " second " be only for describing object, and can not be interpreted as indication or hint relative importance or the implicit quantity that indicates indicated technical characterictic.Thus, one or more these features can be expressed or impliedly be comprised to the feature that is limited with " first ", " second ".In description of the present utility model, the implication of " a plurality of " is two or more, unless otherwise expressly limited specifically.
In the utility model, unless otherwise clearly defined and limited, the terms such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or connect integratedly; Can be mechanical connection, can be to be also electrically connected to; Can be to be directly connected, also can indirectly be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can understand as the case may be the concrete meaning of above-mentioned term in the utility model.
Below in conjunction with accompanying drawing, specifically describe according to the air-conditioning system of the utility model embodiment.
As depicted in figs. 1 and 2, according to the air-conditioning system of the utility model embodiment, comprise: compressor 10, cross valve 20, outdoor heat exchanger 30, indoor set 40, gas-liquid separator 50 and the first control valve 60.
Particularly, compressor 10 is provided with exhaust outlet 11 and gas returning port 12, and cross valve 20 is provided with exhaust port 21, return-air port 22, off-premises station port 23 and indoor set port 24, and exhaust port 21 is communicated with the exhaust outlet 11 of compressor 10.The first end 31 of outdoor heat exchanger 30 is communicated with off-premises station port 23, and indoor set 40 is communicated with the second end 32 and the indoor set port 24 of outdoor heat exchanger 30.Gas-liquid separator 50 comprises import 51 and outlet 52, and import 51 is communicated with return-air port 22, and outlet 52 is communicated with the gas returning port 12 of compressor 10.The first control valve 60 is located between the first end 31 and off-premises station port 23 of outdoor heat exchanger 30.
Thus, according to the air-conditioning system of the utility model embodiment, by the first control valve 60 is set between the first end 31 at outdoor heat exchanger 30 and off-premises station port 23, when outdoor heat exchanger 30 need to be switched to evaporimeter and carried out work by condenser by cross valve 20 commutation, in a period of time after cross valve 20 commutations, can regulate the flow of the first control valve 60, making to enter gas-liquid separator 50, to get back to the refrigerant of compressor 10 less, thereby can prevent that compressor 10 is in outdoor heat exchanger 30 situation with hydraulic compression when condenser becomes evaporimeter, then improve the operational reliability of compressor 10 and system.
It should be noted that, outdoor heat exchanger 30 can be used as condenser and uses, and also can be used as evaporimeter and uses.When outdoor heat exchanger 30 is used as condenser, as shown in Figure 1, the exhaust port 21 of cross valve 20 is communicated with off-premises station port 23, return-air port 22 is communicated with indoor set port 24, the first control valve 60 is opened, the high temperature refrigerant steam of discharging from the exhaust outlet 11 of compressor 10 is condensation heat radiation under the effect of outdoor heat exchanger 30, obtains high temperature refrigerant liquid.Now, air-conditioning system in refrigerating state, for example, can or heat oil return state for heating and defrosting state.
When air-conditioning system is because of performance requirement, need to be from above-mentioned when heating state and exiting, can regulate cross valve 20 commutations, as shown in Figure 2, the exhaust port of cross valve 20 21 is communicated with indoor set port 24, return-air port 22 is communicated with off-premises station port 23, and now, outdoor heat exchanger 30 is used as evaporimeter.Because air-conditioning system is heating under state, the interior low-temperature refrigerant liquid that exists of outdoor heat exchanger 30, in a period of time after cross valve 20 commutations, during outdoor heat exchanger 30 state variation, low-temperature refrigerant liquid in outdoor heat exchanger 30 can enter gas-liquid separator 50 and get back in compressor 10 from cross valve 20, causes compressor 10 situation with hydraulic compression when outdoor heat exchanger 30 switching state to produce.
According to the air-conditioning system of the utility model embodiment, by the first control valve 60 is set between the first end 31 at outdoor heat exchanger 30 and cross valve 20, when outdoor heat exchanger 30 carries out state switching, can control the flow of the first control valve 60, restriction is from the interior flow that flows to the liquid refrigerant of gas-liquid separator 50 of outdoor heat exchanger 30, the refrigerant of getting back to compressor 10 from gas-liquid separator 50 is reduced, thereby can prevent compressor 10 situation with hydraulic compression when outdoor heat exchanger 30 switches to evaporator operation by condenser, then improve the operational reliability of compressor 10 and whole air-conditioning system.
Selection about the first control valve 60 is not particularly limited, as long as meet the requirement that can control the cold medium flux size in air-conditioning system pipeline, and for example can be for being similar to the switching device of water tap.According to an embodiment of the present utility model, the first control valve 60 is electric expansion valve.Further, the aperture of the first control valve 60 is adjustable.Particularly, by regulating the aperture of the first control valve 60, i.e. the flow of the adjustable refrigerant circulating from air-conditioning system pipeline, when need to limit in pipeline flow time, less aperture is opened and be adjusted to the first control valve 60, just can realize the adjusting to cold medium flux.Thus, the first control valve 60 is arranged to electric expansion valve, assembling is simple, and when outdoor heat exchanger 30 carries out state switching, can regulate in time the flow of refrigerant in pipeline, easy to use.
According to an embodiment of the present utility model, this air-conditioning system also comprises that the second control valve 70, the second control valves 70 are located between the first end 31 of outdoor heat exchanger 30 and off-premises station port 23 and are connected in parallel (as depicted in figs. 1 and 2) with the first control valve 60.
The second control valve 70 can be the structure identical with the first control valve 60, can be also different structures.According to an embodiment of the present utility model, the second control valve 70 is magnetic valve.Thus, by two control valves that are connected in parallel are set between outdoor heat exchanger 30 and cross valve 20, two control valve structures are similar with effect, when one of them control valve breaks down, another control valve can work on, guarantee the normal operation of air-conditioning system, further improved the overall operation reliability of air-conditioning system.
Particularly, when air-conditioning system is during in refrigerating state, in air-conditioning system, refrigerant flows to as shown in Figure 1, and now one be opened simultaneously or only be opened to the first control valve 60 and the second control valve 70 can.When air-conditioning system exits refrigerating state, outdoor heat exchanger 30 switch operating states, in air-conditioning system, refrigerant flows to as shown in Figure 2, now in the first control valve 60 and the second control valve 70 closes, another is adjusted to less aperture, or two control valves are all adjusted to less aperture, the flow of restriction refrigerant.
According to an embodiment of the present utility model, air-conditioning system also comprises that the 3rd control valve 80, the three control valves 80 are located between the first end 31 and the second end 32 of outdoor heat exchanger 30.
When air-conditioning system low-temperature heating starts, the first control valve 60 and the second control valve 70 opens simultaneously or one of them opens to maximum opening, air-conditioning system refrigerant flows to as shown in Figure 3, now, outdoor heat exchanger 30 is used as evaporimeter, the liquid coolant of HTHP enters outdoor heat exchanger 30 from the second end 32 of outdoor heat exchanger 30 and carries out throttling cooling and evaporation endothermic, obtains low-temp low-pressure refrigerant.After refrigerant air pressure reduces, in air-conditioning system, velocity of liquid assets can reduce, and can affect to a certain extent operational reliability and the stability of air-conditioning system.
According to the air-conditioning system of the utility model embodiment, between the first end 31 of outdoor heat exchanger 30 and the second end 32, the 3rd control valve 80 is set, when air-conditioning system low-temperature heating starts, the 3rd control valve 80 is opened, the liquid coolant of part HTHP enters outdoor heat exchanger 30 without the second end 32 of outdoor heat exchanger 30, but directly from the 3rd control valve 80, pass through, and mix with the low-temp low-pressure refrigerant flowing out first end 31 from outdoor heat exchanger 30, pass through again cross valve 20, from gas-liquid separator 50, get back to compressor 10.Due to directly from the 3rd control valve 80 refrigerant of process still keep the state of HTHP, with from outdoor heat exchanger 30 through low-temp low-pressure refrigerant mix after, can improve the low pressure of whole air-conditioning system, thereby improve the reliability and stability of whole air-conditioning system.
About being not particularly limited the 3rd control valve 80 and the first control valve 60 and the second being connected of control valve 70, as long as meet the requirement that part refrigerant can pass through and can mix with the refrigerant of process from outdoor heat exchanger 30 from the 3rd control valve 80, alternatively, according to an embodiment of the present utility model, the 3rd control valve 80 and the first control valve 60 are connected in series and are connected in parallel with the second control valve 70.
According to an embodiment of the present utility model, the 3rd control valve 80 is magnetic valve.Particularly, the aperture of the 3rd control valve 80 is also adjustable.Thus, by regulating the aperture of the 3rd control valve 80, can regulate the low pressure of whole air-conditioning system, make the low pressure of whole air-conditioning system within rational scope, thereby further improve the reliability and stability of air-conditioning system.
According to the number of the compressor 10 of the air-conditioning system of the utility model embodiment, can carry out choose reasonable according to the scope of the required use of air-conditioning system, according to an embodiment of the present utility model, air-conditioning system comprises at least one compressor 10, and compressor 10 is frequency-changeable compressor or digital compressor.Correspondingly, the number of outdoor heat exchanger 30 also can rationally regulate as required, and according to an embodiment of the present utility model, outdoor heat exchanger 30 is two, and two outdoor heat exchangers 30 are connected in series and form three-pipe heating recovery system.The air-conditioning system of this structure to those skilled in the art, is all appreciated that and easily realizes, therefore repeating no more.
Below in conjunction with Fig. 1 to Fig. 3, specifically describe according to the air-conditioning system of the utility model embodiment the running under different conditions.
As shown in Figure 1, when air-conditioning system is during in refrigerating state, outdoor heat exchanger 30 is used as condenser, the exhaust port 21 of cross valve 20 is communicated with off-premises station port 23, return-air port 22 is communicated with indoor set port 24, at least one in the first control valve 60 and the second control valve 70 opened, and the 3rd control valve 80 is closed.The high temperature refrigerant steam of discharging from the exhaust outlet 11 of compressor 10 is condensation heat radiation under the effect of outdoor heat exchanger 30, obtains high temperature refrigerant liquid.
When air-conditioning system is because of performance requirement, in the time of need to exiting from above-mentioned refrigerating state, can regulate cross valve 20 commutations, as shown in Figure 2, the exhaust port of cross valve 20 21 is communicated with indoor set port 24, return-air port 22 is communicated with off-premises station port 23, and now, outdoor heat exchanger 30 is used as evaporimeter.Close for one that controls in the first control valve 60 and the second control valve 70, another is adjusted to less aperture, or control the first control valve 60 and the second control valve 70 and be all adjusted to less aperture, when outdoor heat exchanger 30 carries out state switching, can limit from the interior flow that flows to the liquid refrigerant of gas-liquid separator 50 of outdoor heat exchanger 30, the refrigerant of getting back to compressor 10 from gas-liquid separator 50 is reduced, thereby can prevent compressor 10 situation with hydraulic compression when outdoor heat exchanger 30 switches to evaporator operation by condenser, then improve the operational reliability of compressor 10 and whole air-conditioning system.
As shown in Figure 3, when air-conditioning system low-temperature heating starts, the 3rd control valve 80 is opened, the liquid coolant of part HTHP enters outdoor heat exchanger 30 without the second end 32 of outdoor heat exchanger 30, but directly from the 3rd control valve 80, pass through, and mix with the low-temp low-pressure refrigerant flowing out first end 31 from outdoor heat exchanger 30, then pass through cross valve 20, from gas-liquid separator 50, get back to compressor 10.Can improve the low pressure of whole air-conditioning system thus, thereby improve the reliability and stability of whole air-conditioning system.
According to other formations of the air-conditioning system of the utility model embodiment and operation, be all known for those of ordinary skills, be not described in detail here.
In the description of this description, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present utility model or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, the schematic statement of above-mentioned term is not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or feature can be with suitable mode combinations in any one or more embodiment or example.
Although illustrated and described embodiment of the present utility model above, be understandable that, above-described embodiment is exemplary, can not be interpreted as restriction of the present utility model, those of ordinary skill in the art can change above-described embodiment in the situation that not departing from principle of the present utility model and aim in scope of the present utility model, modification, replacement and modification.

Claims (10)

1. an air-conditioning system, is characterized in that, comprising:
Compressor, described compressor is provided with exhaust outlet and gas returning port;
Cross valve, described cross valve is provided with exhaust port, return-air port, off-premises station port and indoor set port, and described exhaust port is communicated with the exhaust outlet of described compressor;
Outdoor heat exchanger, the first end of described outdoor heat exchanger is communicated with described off-premises station port;
Indoor set, described indoor set is communicated with the second end and the described indoor set port of described outdoor heat exchanger;
Gas-liquid separator, described gas-liquid separator comprises import and outlet, and described import is communicated with described return-air port, and described outlet is communicated with the gas returning port of described compressor; And
The first control valve, described the first control valve is located between the first end and described off-premises station port of described outdoor heat exchanger.
2. air-conditioning system according to claim 1, is characterized in that, the aperture of described the first control valve is adjustable.
3. air-conditioning system according to claim 2, is characterized in that, described the first control valve is electric expansion valve.
4. air-conditioning system according to claim 1, is characterized in that, also comprises the second control valve, and described the second control valve is located between the first end of described outdoor heat exchanger and described off-premises station port and is connected in parallel with described the first control valve.
5. air-conditioning system according to claim 4, is characterized in that, described the second control valve is magnetic valve.
6. air-conditioning system according to claim 4, is characterized in that, also comprises the 3rd control valve, and described the 3rd control valve is located between the first end and the second end of described outdoor heat exchanger.
7. air-conditioning system according to claim 6, is characterized in that, described the 3rd control valve and described the first control valve are connected in series and are connected in parallel with described the second control valve.
8. air-conditioning system according to claim 6, is characterized in that, described the 3rd control valve is magnetic valve.
9. according to the air-conditioning system described in any one in claim 1-8, it is characterized in that, described air-conditioning system comprises at least one compressor, and described compressor is frequency-changeable compressor or digital compressor.
10. air-conditioning system according to claim 9, is characterized in that, described outdoor heat exchanger is two, and two described outdoor heat exchangers are connected in series.
CN201320548172.3U 2013-09-04 2013-09-04 Air conditioning system Withdrawn - After Issue CN203501527U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320548172.3U CN203501527U (en) 2013-09-04 2013-09-04 Air conditioning system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320548172.3U CN203501527U (en) 2013-09-04 2013-09-04 Air conditioning system

Publications (1)

Publication Number Publication Date
CN203501527U true CN203501527U (en) 2014-03-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201320548172.3U Withdrawn - After Issue CN203501527U (en) 2013-09-04 2013-09-04 Air conditioning system

Country Status (1)

Country Link
CN (1) CN203501527U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104422208A (en) * 2013-09-04 2015-03-18 广东美的暖通设备有限公司 Air conditioning system
CN104879940A (en) * 2015-05-14 2015-09-02 珠海格力电器股份有限公司 Air-conditioner system and control method thereof
CN104964343A (en) * 2015-06-12 2015-10-07 广东美的暖通设备有限公司 Device and method for improving running reliability of compressor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104422208A (en) * 2013-09-04 2015-03-18 广东美的暖通设备有限公司 Air conditioning system
CN104422208B (en) * 2013-09-04 2017-04-05 广东美的暖通设备有限公司 Air conditioning system
CN104879940A (en) * 2015-05-14 2015-09-02 珠海格力电器股份有限公司 Air-conditioner system and control method thereof
CN104964343A (en) * 2015-06-12 2015-10-07 广东美的暖通设备有限公司 Device and method for improving running reliability of compressor

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