CN204254925U - Heat-exchange system and there is its air-conditioner - Google Patents

Heat-exchange system and there is its air-conditioner Download PDF

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Publication number
CN204254925U
CN204254925U CN201420736815.1U CN201420736815U CN204254925U CN 204254925 U CN204254925 U CN 204254925U CN 201420736815 U CN201420736815 U CN 201420736815U CN 204254925 U CN204254925 U CN 204254925U
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CN
China
Prior art keywords
heat
capillary
exchange system
compressor
heat exchanger
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Expired - Fee Related
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CN201420736815.1U
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Chinese (zh)
Inventor
魏广飞
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Priority to CN201420736815.1U priority Critical patent/CN204254925U/en
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Publication of CN204254925U publication Critical patent/CN204254925U/en
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Abstract

The utility model provides a kind of heat-exchange system and has its air-conditioner.This heat-exchange system comprises: compressor; Throttle structure, throttle structure is connected with compressor, and throttle structure comprises the first capillary and the second capillary that connect successively; Auxiliary short-circuit structure, auxiliary short-circuit structure comprises short circuit branch road and the first control valve, and short circuit branch circuit parallel connection is at the two ends of the second capillary, and the first control valve to be arranged on short circuit branch road and to control the break-make of short circuit branch road.This heat-exchange system can adapt to different running frequencies and ensure efficiency.

Description

Heat-exchange system and there is its air-conditioner
Technical field
The utility model relates to art of refrigeration units, in particular to a kind of heat-exchange system and the air-conditioner with it.
Background technology
The throttling arrangement of existing heat-exchange system generally adopts electric expansion valve throttling, and its restriction effect is better, and adjustable range is wide, but its cost is higher.In order to reduce costs, capillary can be adopted as throttling arrangement, capillary-compensated also can meet efficiency and APF requirement.General heat-exchange system adopts capillary throttle device, in its Performance Match process, is generally with specified refrigerated medium focus for standard, regulates the main capillary pipe length of capillary and auxiliary capillary length of tube to determine the length of final capillary module.But coupling has certain defect like this, and its defect mainly contains:
Capillary module length only can meet the efficiency requirement of specified cooling and warming, for other Frequency points (middle cooling and warming and 25% cooling and warming), its efficiency is general lower, from experimental data, although the flow of compressor low frequency operating point is low, but its pressure reduction is also relatively much little, cause the throttling of capillary existing length inadequate, needing to increase capillary pipe length just can make its efficiency reach best, but for taking into account the efficiency of specified refrigerated medium focus, the efficiency of other points can only be sacrificed.
Application capillary is as throttling arrangement, not enough in low-frequency operation point (intermediate point and 25% point) the compressor air suction degree of superheat, although general heat-exchange system compressor inlet has fluid reservoir, but suction superheat wretched insufficiency still can increase the possibility of compressor liquid hammer, there is impact to refrigeration reliability;
Application capillary is as throttling arrangement, and at low-frequency operation point, compressor over-heat at the bottom degree is not enough, and for the outer machine matched data of brand-new frequency conversion, 25% heats a compression motor spindle degree of superheat deficiency, and it is larger on system reliability impact that compressor over-heat at the bottom degree is not enough.
Utility model content
Main purpose of the present utility model is the air-conditioner providing a kind of heat-exchange system and have it, to solve the refrigeration of the prior art problem that capillary-compensated efficiency is low when low-frequency operation.
To achieve these goals, according to an aspect of the present utility model, provide a kind of heat-exchange system, this heat-exchange system comprises: compressor; Throttle structure, throttle structure is connected with compressor, and throttle structure comprises the first capillary and the second capillary that connect successively; Auxiliary short-circuit structure, auxiliary short-circuit structure comprises short circuit branch road and the first control valve, and short circuit branch circuit parallel connection is at the two ends of the second capillary, and the first control valve to be arranged on short circuit branch road and to control the break-make of short circuit branch road.
Further, heat-exchange system also comprises First Heat Exchanger and the second heat exchanger, and First Heat Exchanger, the second heat exchanger and compressor are connected successively, and throttle structure is connected between First Heat Exchanger and the second heat exchanger.
Further, heat-exchange system also comprises cross valve, first valve port of cross valve is connected with the outlet of compressor, second valve port of cross valve is connected with the first of First Heat Exchanger, 3rd valve port of cross valve is connected with the import of compressor, and the 4th valve port of cross valve is connected with the first of the second heat exchanger.
Further, second mouthful of First Heat Exchanger is connected with the first capillary, and the second capillary and short circuit branch road are all connected to second mouthful of the second heat exchanger.
Further, heat-exchange system also comprises: detection piece, and detection piece is connected with compressor and detects the running frequency of compressor; Control structure, control structure is connected with detection piece and receives the running frequency of the compressor that detection piece detects, control structure is connected with the first control valve, and controls the first control valve according to running frequency and open or close.
Further, the first control valve is magnetic valve.
Further, throttle structure also comprises three capillary, and three capillary and the first capillary paralleling are arranged, and the branch road at three capillary place have been arranged in series the second control valve, and the second control valve controls the opening and closing of the branch road at three capillary place.
Further, the second control valve is check valve.
According to another aspect of the present utility model, provide a kind of air-conditioner, air-conditioner comprises heat-exchange system, and heat-exchange system is above-mentioned heat-exchange system.
Application the technical solution of the utility model, heat-exchange system comprises compressor, throttle structure and auxiliary short-circuit structure.Throttle structure is connected with compressor, throttle structure comprises the first capillary and the second capillary that connect successively, auxiliary short-circuit structure comprises short circuit branch road and the first control valve, short circuit branch circuit parallel connection is at the two ends of the second capillary, and the first control valve to be arranged on short circuit branch road and to control the break-make of short circuit branch road.When the running frequency of compressor is higher than first frequency, the first control valve is opened, short circuit branch road short circuit second capillary, and when the running frequency of compressor is lower than first frequency, the first control valve is closed, the second capillary-compensated.Refrigerant in first capillary and the equal heat exchanging system of the second capillary carries out throttling, meets the requirements to make the efficiency of heat-exchange system.Because the running frequency of compressor in different operating environment of heat-exchange system is different, in order to ensure that compressor is under any running frequency, throttle structure can meet user demand, there is good restriction effect, thus controlled the length of capillary refrigerant being carried out to throttling by auxiliary short-circuit structure according to the running frequency of compressor.When the running frequency of compressor is lower than first frequency, compressor operating frequency is lower, need the capillary-compensated more grown, to improve restriction effect, improve efficiency, now the first control valve of auxiliary short-circuit structure is closed, and short circuit branch road is obstructed, short circuit is not carried out to the second capillary, carry out throttling by the first capillary and the second capillary.When the running frequency of compressor is higher than first frequency, compressor operating frequency is higher, need that the capillary pipe length of throttling is less just can ensure restriction effect and efficiency requirement, therefore the first control valve of auxiliary short-circuit structure is opened, short circuit branch road is communicated with, by short circuit branch road by the second capillary short circuit, the first capillary is only had to carry out throttling.Thus achieve the coupling of the different running frequencies to compressor, ensure that compressor all has higher efficiency in any running frequency.
Accompanying drawing explanation
The Figure of description forming a application's part is used to provide further understanding of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 shows the schematic diagram of the heat-exchange system according to embodiment of the present utility model.
Wherein, above-mentioned accompanying drawing comprises the following drawings mark:
101, First Heat Exchanger; 102, cross valve; 103, compressor; 104, short circuit branch road; 105, the first control valve; 106, the second capillary; 107, three capillary; 108, the second control valve; 109, the first capillary; 110, the second heat exchanger.
Detailed description of the invention
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the utility model in detail in conjunction with the embodiments.
As shown in Figure 1, according to embodiment of the present utility model, heat-exchange system comprises compressor 103, throttle structure and auxiliary short-circuit structure.Throttle structure is connected with compressor 103, throttle structure comprises the first capillary 109 and the second capillary 106 connected successively, auxiliary short-circuit structure comprises short circuit branch road 104 and the first control valve 105, short circuit branch road 104 is connected in parallel on the two ends of the second capillary 106, and the first control valve 105 to be arranged on short circuit branch road 104 and to control the break-make of short circuit branch road 104.
When the running frequency of compressor 103 is higher than first frequency, the first control valve 105 is opened, short circuit branch road 104 short circuit second capillary 106, and when the running frequency of compressor 103 is lower than first frequency, the first control valve 105 is closed, the second capillary 106 throttling.
First capillary 109 and the second capillary 106 refrigerant all in heat exchanging system carries out throttling, meets the requirements to make the efficiency of heat-exchange system.Because the running frequency of compressor 103 in different operating environment of heat-exchange system is different, in order to ensure that compressor 103 is under any running frequency, throttle structure can meet user demand, there is good restriction effect, thus controlled the length of capillary refrigerant being carried out to throttling by auxiliary short-circuit structure according to the running frequency of compressor 103.When the running frequency of compressor 103 is lower than first frequency, compressor 103 running frequency is lower, need the capillary-compensated more grown, to improve restriction effect, improve efficiency, now the first control valve 105 of auxiliary short-circuit structure is closed, and short circuit branch road 104 is obstructed, short circuit is not carried out to the second capillary 106, carry out throttling by the first capillary 109 and the second capillary 106.When the running frequency of compressor 103 is higher than first frequency, compressor 103 running frequency is higher, need that the capillary pipe length of throttling is less just can ensure restriction effect and efficiency requirement, therefore the first control valve 105 of auxiliary short-circuit structure is opened, short circuit branch road 104 is communicated with, by short circuit branch road 104 by the second capillary 106 short circuit, the first capillary 109 is only had to carry out throttling.Thus achieve the coupling of the different running frequencies to compressor 103, ensure that compressor 103 all has higher efficiency in any running frequency.
In the present embodiment, heat-exchange system also comprises First Heat Exchanger 101 and the second heat exchanger 110, and First Heat Exchanger 101, second heat exchanger 110 and compressor 103 are connected successively, and throttle structure is connected between First Heat Exchanger 101 and the second heat exchanger 110.Refrigerant in First Heat Exchanger 101 and the second heat exchanger 110 and extraneous heat exchange realize freezing or heating.One in First Heat Exchanger 101 and the second heat exchanger 110 is positioned at indoor, and another is disposed in the outdoor.In the present embodiment, First Heat Exchanger 101 is disposed in the outdoor, and the second heat exchanger 110 is disposed in the outdoor.Throttle structure is connected between First Heat Exchanger 101 and the second heat exchanger 110, and to carry out throttling to refrigerant, refrigerant is evaporated in follow-up heat exchanger more abundant, efficiency is higher.
In the present embodiment, heat-exchange system also comprises cross valve 102, first valve port of cross valve 102 is connected with the outlet of compressor 103, second valve port of cross valve 102 is connected with the first of First Heat Exchanger 101,3rd valve port of cross valve 102 is connected with the import of compressor 103, and the 4th valve port of cross valve 102 is connected with the first of the second heat exchanger 110.The flow direction of refrigerant can be controlled by cross valve 102, and then control the mode of operation of heat-exchange system.
Second mouthful of First Heat Exchanger 101 is connected with the first capillary 109, and the second capillary 106 and short circuit branch road 104 are all connected to second mouthful of the second heat exchanger 110.
Heat-exchange system also comprises detection piece and control structure.
Detection piece is connected with compressor 103 and detects the running frequency of compressor 103, control structure is electrically connected with detection piece and receives the running frequency of the compressor 103 that detection piece detects, control structure is connected with the first control valve 105, and controls the first control valve 105 according to running frequency and open or close.Auxiliary short-circuit structure can be controlled according to the running frequency of compressor 103 timely and accurately by control structure whether to work, control more promptly and accurately.
In order to simple control structure, improve control efficiency and reduce to take up room simultaneously, the first control valve 105 is magnetic valve.Control structure is controller, controls opening or closing of the first control valve 105 by the power on/off of controller Controlling solenoid valve.
In the present embodiment, in order to improve throttle efficiency, throttle structure also comprises three capillary 107, three capillary 107 and the first capillary 109 are arranged in parallel, the branch road at the place of three capillary 107 is arranged in series the opening and closing that the second control valve 108, the second control valve 108 controls the branch road at three capillary 107 place.Second control valve 108 can opening and closing as required, if when cold medium flux is large, the second control valve 108 can be opened, three capillary 107 is made to shunt a part of refrigerant, to alleviate the choke pressure of the first capillary 109, three capillary 107 and the first capillary 109 carry out throttling to refrigerant simultaneously simultaneously, and throttle efficiency is higher.
In the present embodiment, second control valve 108 is check valve, check valve does not need Special controlling, heat-exchange system can carry out its switch of self adaptation according to cooling operation mode, refrigeration mode closed check valve automatically, and three capillary 107 does not participate in system throttles, heating mode system inner refrigerant flows to contrary, check valve is opened automatically, and three capillary 107 participates in system throttles, to adapt to heating mode refrigerant flow requirements.
The course of work of this heat-exchange system is as follows:
When heat-exchange system is in refrigeration mode, refrigerant flow direction is the direction of arrow in Fig. 1, cold-producing medium is compressed into pressure high temperature hot gas after compressor 103, and the First Heat Exchanger 101 being in outdoor is entered by cross valve 102, then carry out throttling through the first capillary 109 and become low-pressure low-temperature gas-liquid two-phase state, now control by the controller of heat-exchange system the running frequency that detection piece detects compressor 103, then selection refrigerant flow direction is carried out according to detection data, if the running frequency of compressor 103 is higher than first frequency, then by controller opens first control valve 105 of heat-exchange system, cold-producing medium is by short circuit branch road 104, then compressor 103 is got back to through being in the second indoor heat exchanger 110, formed and once circulate.If the running frequency of compressor 103 is lower than first frequency, then close the first control valve 105 by the controller of heat-exchange system, cold-producing medium flows through the second capillary 106, enters and be in the second indoor heat exchanger 110 after further throttling, finally flow back to compressor 103, formed and once circulate.
When heat-exchange system is in heating mode, refrigerant flow direction is contrary with the direction of arrow in Fig. 1, cold-producing medium is compressed into pressure high temperature hot gas through compressor 103, and the second heat exchanger 110 being in indoor is entered by cross valve 102, in the exit of the second heat exchanger 110, the running frequency that detection piece detects compressor 103 is controlled by the controller of heat-exchange system, and carry out selection refrigerant flow direction according to detection data, if the running frequency of compressor 103 is higher than first frequency, then by controller opens first control valve 105 of heat-exchange system, cold-producing medium is by short circuit branch road 104, then flow into the first capillary 109 and carry out throttling, become low-pressure low-temperature state to enter to be in after outdoor First Heat Exchanger 101 carries out heat exchange and flow back to compressor 103, form a circulation.If the running frequency of compressor 103 is lower than first frequency, then close the first control valve 105 by the controller of heat-exchange system, cold-producing medium flows into be in after indoor First Heat Exchanger 101 carries out heat exchange and flows back to compressor 103 after the second capillary 106 and the first capillary 109 carry out throttling.Complete and once circulate.
When this system is applied to frequency conversion refrigeration, the length of the capillary controlling throttling that whether worked by solenoid control second capillary 106, with the running frequency of match compressor 103, ensure that efficiency.
According to another aspect of the present utility model, provide a kind of air-conditioner, this air-conditioner comprises heat-exchange system, and this heat-exchange system is above-mentioned heat-exchange system.Adopt the air-conditioner of this heat-exchange system can select chock length as required, better adaptability.
As can be seen from the above description, the utility model the above embodiments achieve following technique effect: this heat-exchange system structure is simple, controls easy in time, and the different frequency of match compressor can select different chock length, guarantee efficiency.By increasing by one section of capillary in heat-exchange system, and by solenoid control, whether it runs, and makes heat-exchange system efficiency when high and low frequency all higher; Solve the problem of heat-exchange system suction superheat deficiency when low-frequency operation; Solve the problem of heat-exchange system compressor over-heat at the bottom degree deficiency when low-frequency operation; Elevator system efficiency, increases system reliability.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.

Claims (9)

1. a heat-exchange system, is characterized in that, comprising:
Compressor (103);
Throttle structure, described throttle structure is connected with described compressor (103), and described throttle structure comprises the first capillary (109) and the second capillary (106) that connect successively;
Auxiliary short-circuit structure, described auxiliary short-circuit structure comprises short circuit branch road (104) and the first control valve (105), described short circuit branch road (104) is connected in parallel on the two ends of described second capillary (106), and described first control valve (105) is arranged on described short circuit branch road (104) and goes up and the break-make controlling described short circuit branch road (104).
2. heat-exchange system according to claim 1, it is characterized in that, described heat-exchange system also comprises First Heat Exchanger (101) and the second heat exchanger (110), described First Heat Exchanger (101), described second heat exchanger (110) and described compressor (103) are connected successively, and described throttle structure is connected between described First Heat Exchanger (101) and described second heat exchanger (110).
3. heat-exchange system according to claim 2, it is characterized in that, described heat-exchange system also comprises cross valve (102), first valve port of described cross valve (102) is connected with the outlet of described compressor (103), second valve port of described cross valve (102) is connected with the first of described First Heat Exchanger (101), 3rd valve port of described cross valve (102) is connected with the import of described compressor (103), and the 4th valve port of described cross valve (102) is connected with the first of described second heat exchanger (110).
4. heat-exchange system according to claim 3, it is characterized in that, second mouthful of described First Heat Exchanger (101) is connected with described first capillary (109), and described second capillary (106) and described short circuit branch road (104) are all connected to second mouthful of described second heat exchanger (110).
5. heat-exchange system according to claim 1, is characterized in that, described heat-exchange system also comprises:
Detection piece, described detection piece is connected with described compressor (103) and detects the running frequency of described compressor (103);
Control structure, described control structure is connected with described detection piece and receives the running frequency of the described compressor (103) that described detection piece detects, described control structure is connected with described first control valve (105), and opens or closes according to described first control valve (105) of described running frequency control.
6. heat-exchange system according to claim 5, is characterized in that, described first control valve (105) is magnetic valve.
7. heat-exchange system according to claim 1, it is characterized in that, described throttle structure also comprises three capillary (107), described three capillary (107) and described first capillary (109) are arranged in parallel, the branch road at described three capillary (107) place has been arranged in series the second control valve (108), and described second control valve (108) controls the opening and closing of the branch road at described three capillary (107) place.
8. heat-exchange system according to claim 7, is characterized in that, described second control valve (108) is check valve.
9. an air-conditioner, described air-conditioner comprises heat-exchange system, it is characterized in that, the heat-exchange system of described heat-exchange system according to any one of claim 1 to 8.
CN201420736815.1U 2014-11-27 2014-11-27 Heat-exchange system and there is its air-conditioner Expired - Fee Related CN204254925U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106595142A (en) * 2017-02-06 2017-04-26 刘勇 Expansion device and CO2 heat pump provided with enhanced vapor injection circuit and used in arctic weather
CN109269160A (en) * 2018-08-21 2019-01-25 青岛海尔股份有限公司 Single system refrigeration system and refrigeration equipment
WO2023040240A1 (en) * 2021-09-19 2023-03-23 青岛海尔空调器有限总公司 Heat exchanger, refrigeration circulation system, and air conditioner

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106595142A (en) * 2017-02-06 2017-04-26 刘勇 Expansion device and CO2 heat pump provided with enhanced vapor injection circuit and used in arctic weather
CN106595142B (en) * 2017-02-06 2022-07-15 刘勇 Carbon dioxide heat pump with enhanced vapor injection loop for extremely cold weather
CN109269160A (en) * 2018-08-21 2019-01-25 青岛海尔股份有限公司 Single system refrigeration system and refrigeration equipment
WO2023040240A1 (en) * 2021-09-19 2023-03-23 青岛海尔空调器有限总公司 Heat exchanger, refrigeration circulation system, and air conditioner

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150408

Termination date: 20211127

CF01 Termination of patent right due to non-payment of annual fee