CN102589048A - Water-cooling multi-connected unit and working manner thereof - Google Patents

Water-cooling multi-connected unit and working manner thereof Download PDF

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Publication number
CN102589048A
CN102589048A CN201210036575XA CN201210036575A CN102589048A CN 102589048 A CN102589048 A CN 102589048A CN 201210036575X A CN201210036575X A CN 201210036575XA CN 201210036575 A CN201210036575 A CN 201210036575A CN 102589048 A CN102589048 A CN 102589048A
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valve
indoor
compressor
unit
adjustable
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CN201210036575XA
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周玉涛
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周玉涛
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Priority to CN201210036575XA priority Critical patent/CN102589048A/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The invention discloses a water-cooling multi-connected unit and a control manner thereof. The multi-connected unit system comprises an outdoor heat exchanger, a compressor, an oil separator and a plurality of indoor units, wherein the oil separator is arranged between the compressor and a four-way valve, the four-way valve is respectively connected with the outdoor heat exchanger, the indoor units and a low-pressure inlet of the compressor, the indoor units are connected with the outdoor heat exchanger, pipelines of output ends of the indoor units are provided with electronic expansion valves and the electronic expansion valves are converged onto a connecting pipe and then connected to the outdoor heat exchanger. According to the invention, each indoor unit is equipped with one electronic expansion valve and completes a throttling and pressure reduction process through the electronic expansion valve so that refrigerant in a copper pipe between the electronic expansion valve and the outdoor heat exchanger is in a gas-liquid mixed state, and therefore the problem of the traditional multi-connected unit that the refrigerant charge is not matched during refrigerating and heating processes of the refrigerant can be solved, a liquid storage device is not needed, the system structure is simplified; and moreover, since the refrigerant circularly flows between the pipelines and all components, the loss of the refrigerant is reduced and the performance and effect of the unit can be improved.

Description

A kind of water-cooled multiple unit and working method thereof
Technical field
The present invention relates to the air-conditioning product technical field, be specifically related to a kind of many on-line systems.
Background technology
The multiple unit is to drag many modes; It is that a main frame drives several indoor sets; What adopt is frequency-changeable compressor, and most of multiple central air-conditioning unit can be regulated between 10-130% automatically, and it has advantages such as effective, that efficient is high, power consumption is low.Traditional multiple central air-conditioning unit all will be provided with a reservoir and be used to store unnecessary cold-producing medium; Unnecessary reason is to cause cold-producing medium; The main throttle part of tradition air-conditioning unit is in outdoor evaporimeter front, and the state of cold-producing medium is liquid state in this section pipeline when heating, because the volume of pipeline is constant; And then there is not this problem in the amount of liquid refrigerant of equal volume obviously greatly more than the gaseous refrigerant amount of equal volume when refrigeration.So just cause system more when required refrigerant amount is than refrigeration when heating, the charging amount of cold-producing medium does not match when causing refrigeration and heating.The refrigeration that traditional many on-line systems that Here it is exist always, heat the unmatched problem of charging amount.In order to store this part unmatched cold-producing medium, so designed reservoir, when refrigeration, unnecessary cold-producing medium gets in the reservoir and stores, and calls this part cold-producing medium when heating again, through realizing balance like this.Yet the design of installing reservoir additional can change the structure of system, increases the production cost of equipment, and can influence the performance of system.
In addition, present employed water-cooled multiple unit, the discharge of process sleeve pipe is basicly stable.So just possibly cause following problem: because the working environment (like temperature) of air-conditioning unit changes, therefore, unit possibly need bigger condensing pressure in the course of the work sometimes, just needs less discharge and will obtain bigger condensing pressure; In the time of other, then need less condensing pressure, obtain the discharge that less condensing pressure then will be bigger.Conventional rack can not be regulated owing to discharge; Therefore condensing pressure can not correspondingly be regulated, and so just possibly cause unit not only not cause unit that temperature controlled accuracy is decreased with the state work of mating most; Control accuracy like conventional rack is generally ± and 1 ℃; One twice the temperature difference almost can be ignored for the influence of common life area really, yet but is very big for the influence in some accurate places, as to the strict laboratory of temperature requirement etc.; Also can increase the energy consumption of unit in addition.
In the evaporimeter of air-conditioning; Because liquid refrigerant evaporates in evaporimeter; Become the process of gas by liquid refrigerant, consider the variation of load, and the amount of liquid refrigerant that gets into evaporimeter can not freely be controlled; Therefore may can not all evaporate by some cold-producing medium, can directly enter into compressor.Because the Incoercibility of liquid refrigerant; So before not getting into compressor; At first to gas-liquid be separated from each other and come; Prevent that the low-pressure low-temperature steam that returns compressor from carrying too much liquid refrigerant entering compresser cylinder, guarantees that getting into the whole of compressor is gas, to guarantee the eupraxic running of compression.In order to address this problem, so designed gas-liquid separator, be installed in the position, gateway of compressor, gas-liquid is separated, be gaseous refrigerant with what guarantee to get into compressor.Yet, gas-liquid separator itself is installed can be made the structure of unit become more complicated, thereby increase the cost of product; In addition, facts have proved that the separating effect of gas-liquid separator is limited; Common gas-liquid separator effect is good inadequately, and high-precision gas-liquid separator then cost is quite expensive.
Summary of the invention
The technical problem that the present invention will solve provide a kind of cost lower, make that the unit control accuracy is higher, better effects if, many on-line systems and control mode thereof more energy-conservation, that need not that reservoir is installed, need not to install gas-liquid separator.
For solving the problems of the technologies described above; The present invention adopts following technical scheme: a kind of many on-line systems of no reservoir; It is characterized in that: these many on-line systems comprise outdoor heat exchanger, compressor, oil content and some indoor sets, and oil content is located between compressor and the cross valve, and the high-pressure outlet of compressor connects the input port of oil content; The main delivery outlet of oil content connects first interface of cross valve, and the secondary delivery outlet of oil content connects the low-pressure inlet of compressor; The second interface junction chamber external heat exchanger of cross valve, the 3rd interface connects indoor set, and the 4th interface connects the compressor low-pressure inlet; Indoor set junction chamber external heat exchanger connects through connecting leg between aforementioned each equipment; The pipeline of indoor set output is provided with electric expansion valve, and each indoor set all is connected with an electric expansion valve, and all electric expansion valves are connected to outdoor heat exchanger after being aggregated into connecting leg by the road.
Further, on the 3rd interface of cross valve and the connecting leg between the indoor set, throttling arrangement is installed.
Further, on the connecting leg between indoor set and the outdoor heat exchanger, throttling arrangement is installed.
Further, the connecting leg between cross valve the 4th interface and the compressor low-pressure inlet is provided with capillary.
Its control mode heats control mode in other words and is: system is in the process of heating, and the high temperature and high pressure gaseous refrigerant that compressor is discharged arrives indoor set through behind the cross valve; Cold-producing medium is in the indoor set condensation; Emit heat, in the coil pipe of indoor set, become the liquid refrigerant of temperature in the high pressure then, through obtaining the cold-producing medium of low-temp low-pressure, gas-liquid mixed after the electric expansion valve throttling; To outdoor heat exchanger, get back to compressor through cross valve through connecting leg again.The maximum characteristics of native system are to accomplish the process of throttling step-down through electric expansion valve; The state of cold-producing medium becomes gas-liquid mixed in the connecting leg (copper pipe) between making from the electric expansion valve to the outdoor heat exchanger; So just make the refrigerant amount that is stored in the pipe reduce, promptly the required refrigerant amount of system has reduced.
The present invention installs an electric expansion valve through the output of giving every indoor set, accomplishes the process of system's throttling step-down through electric expansion valve, and the state of cold-producing medium becomes gas-liquid mixed in the copper pipe between making like this from the electric expansion valve to the outdoor heat exchanger; Thereby reduced the refrigerant amount that is stored in the copper pipe; Also just make the required refrigerant amount of system reduce, exist cold-producing medium in refrigeration, the unmatched problem of charging amount when heating, therefore no longer need reservoir thereby solved traditional many on-line systems; Thereby simplified the structure of system; Reduce production costs, and cold-producing medium directly circulates between pipeline and each parts, no longer the stop over reservoir; Can reduce its loss, promote the performance and the effect of unit.
Through two two-port valves are installed on outlet pipe, one adjustable, and one non-adjustable; Change and when need regulating the condensing pressure of unit at environment, can realize regulating condensing pressure through the discharge of sleeve pipe, make condensing pressure satisfy environment requirement through control; And control discharge is accomplished through two two-port valves, and condensing pressure that so can accuracy-control system guarantees that unit always moves with optimal state; Both can improve unit to control accuracy of temperature, can improve unit efficiency again, guarantee unit safety; Cut down the consumption of energy energy savings.
Output through giving every indoor set is installed an electric expansion valve; Make system under any operating mode; Regulate as leading with the actual degree of superheat of compressor, be in poised state, make the operation that compressor can both safety under any operating mode with this degree of superheat of guaranteeing compressor low pressure air suction mouth; And with the adjusting of indoor set self as auxiliary, again can balance the balance of refrigerant amount between machine in each, therefore can cancel gas-liquid separator, can improve the efficiency of unit, and simplify the structure of system, reduce the cost of product.
Description of drawings
Fig. 1 is a structural representation block diagram of the present invention.
Among the figure, 1 is electric expansion valve, and 2 is connecting leg, and 3 is cross valve, and 4 is throttling arrangement, and 5 is throttling arrangement.
The specific embodiment
In the present embodiment; With reference to Fig. 1, many on-line systems of said no reservoir, these many on-line systems comprise outdoor heat exchanger, compressor, oil content (being oil eliminator) and some indoor sets; Oil content is located between compressor and the cross valve 3; The high-pressure outlet of compressor connects the input port of oil content, and the main delivery outlet of oil content connects first interface of cross valve 3, and the secondary delivery outlet of oil content connects the low-pressure inlet of compressor; The second interface junction chamber external heat exchanger of cross valve 3, the 3rd interface connects indoor set, and the 4th interface connects the compressor low-pressure inlet; Indoor set junction chamber external heat exchanger connects through connecting leg 2 between aforementioned each equipment; The pipeline of indoor set output is provided with electric expansion valve 1, and each indoor set all is connected with an electric expansion valve 1, is connected to outdoor heat exchanger after all electric expansion valves 1 are aggregated into connecting leg 2 by the road.
On the 3rd interface of cross valve 3 and the connecting leg 2 between the indoor set, throttling arrangement 4 is installed.
Throttling arrangement 5 is installed on the connecting leg between indoor set and the outdoor heat exchanger 2.
The 4th interface of cross valve 3 and the connecting leg between the compressor low-pressure inlet are provided with capillary.
Heating control mode is: system is in the process of heating, and the high temperature and high pressure gaseous refrigerant that compressor is discharged arrives indoor set through cross valve 3 backs; Cold-producing medium is in the indoor set condensation; Emit heat, in the coil pipe of indoor set, become the liquid refrigerant of temperature in the high pressure then, through obtaining the cold-producing medium of low-temp low-pressure, gas-liquid mixed after electric expansion valve 1 throttling; To outdoor heat exchanger, get back to compressor through cross valve 3 through connecting leg 2 again.The maximum characteristics of native system are to accomplish the process of throttling step-down through electric expansion valve 1; The state of cold-producing medium becomes gas-liquid mixed making from electric expansion valve 1 to the connecting leg the outdoor heat exchanger 2 (copper pipe); So just make the refrigerant amount that is stored in the pipe reduce, promptly the required refrigerant amount of system has reduced.
Below the present invention is done a detailed description, the above is merely the present invention's preferred embodiment, when can not limiting practical range of the present invention, promptly allly does impartially to change and modify according to the application's scope, all should still belong in the covering scope of the present invention.

Claims (9)

1. water-cooled multiple unit, this water-cooled multiple unit comprises sleeve pipe, and sleeve pipe is equipped with water inlet pipe and outlet pipe, and sleeve pipe is also through being connected with the blast pipe of compressor compressor air-discharging communicating pipe, and is provided with the cold-producing medium effuser that is used for the cold-producing medium water conservancy diversion; Whole unit is divided into two groups of pipelines, and one group is water pipeline, and water gets into sleeve pipe from water inlet pipe, is flowed out by outlet pipe again; Another group is a refrigerant line; Cold-producing medium gets into sleeve pipe from compressor, flows out through the cold-producing medium effuser again, and it is characterized in that: these many on-line systems comprise outdoor heat exchanger, compressor, oil content and some indoor sets; Oil content is located between compressor and the cross valve; The high-pressure outlet of compressor connects the input port of oil content, and the main delivery outlet of oil content connects first interface of cross valve, and the secondary delivery outlet of oil content connects the low-pressure inlet of compressor; The second interface junction chamber external heat exchanger of cross valve, the 3rd interface connects indoor set, and the 4th interface connects the compressor low-pressure inlet; Indoor set junction chamber external heat exchanger connects through connecting leg between aforementioned each equipment; The pipeline of indoor set output is provided with electric expansion valve, and each indoor set all is connected with an electric expansion valve, and all electric expansion valves are connected to outdoor heat exchanger after being aggregated into connecting leg by the road; Adopt an adjustable two-port valve and a non-adjustable two-port valve the controlling that cooperatively interact to discharge; Two two-port valves all are installed on the outlet pipe; Non-adjustable two-port valve is connected across the two ends of adjustable two-port valve, and adjustable two-port valve and non-adjustable two-port valve constitute separate parallel construction; These many on-line systems comprise outdoor heat exchanger, compressor, oil content and some indoor sets; Oil content is located between compressor and the cross valve; The high pressure gas outlet of compressor connects the input port of oil content; The main delivery outlet of oil content connects first interface of cross valve, and the secondary delivery outlet of oil content connects the low pressure air suction mouth of compressor; The second interface junction chamber external heat exchanger of cross valve, the 3rd interface connects indoor set, and the 4th interface connects compressor low pressure air suction mouth; Indoor set junction chamber external heat exchanger connects through connecting leg between aforementioned each equipment; The pipeline of indoor set output is provided with electric expansion valve, and each indoor set all is connected with an electric expansion valve, and all electric expansion valves are connected to outdoor heat exchanger after being aggregated into connecting leg by the road.
2. water-cooled multiple unit according to claim 1 is characterized in that: the bore of said adjustable two-port valve is identical with the bore of non-adjustable two-port valve, and the adjustable range of adjustable two-port valve is 0-100% of a non-adjustable two-port valve flow.
3. water-cooled multiple unit according to claim 1 is characterized in that: on the 3rd interface of cross valve and the connecting leg between the indoor set, throttling arrangement is installed.
4. water-cooled multiple unit according to claim 1 is characterized in that: on the connecting leg between indoor set and the outdoor heat exchanger, throttling arrangement is installed.
5. water-cooled multiple unit according to claim 1 is characterized in that: the 4th interface of cross valve and the connecting leg between the compressor low-pressure inlet are provided with capillary.
6. water-cooled multiple unit according to claim 1 is characterized in that: on the 3rd interface of cross valve and the connecting leg between the indoor set, throttling arrangement is installed.
7. water-cooled multiple unit according to claim 1 is characterized in that: on the connecting leg between indoor set and the outdoor heat exchanger, throttling arrangement is installed.
8. water-cooled multiple unit according to claim 1 is characterized in that: the connecting leg between the 4th interface of cross valve and the compressor low pressure air suction mouth is provided with capillary.
9. the working method of the described water-cooled multiple of claim 1 unit is characterized in that: when system's refrigerating operaton, control the opening and closing of adjustable two-port valve and non-adjustable two-port valve through the condensing pressure of detection system; When condensing pressure when higher, non-adjustable two-port valve is opened, discharge increases, condensing pressure descends, if pressure still fails to meet the demands, continues to open adjustable two-port valve, discharge further increases, and condensing pressure is met the demands; When condensing pressure is relatively lower, close non-adjustable two-port valve, discharge reduces, and condensing pressure improves, if pressure still fails to meet the demands, continues to close adjustable two-port valve, and discharge further reduces, and condensing pressure is met the demands; System is in the process of heating, and the high temperature and high pressure gaseous refrigerant that compressor is discharged arrives indoor set through behind the cross valve; Cold-producing medium is in the indoor set condensation; Emit heat, in the coil pipe of indoor set, become the liquid refrigerant of temperature in the high pressure then, through obtaining the cold-producing medium of low-temp low-pressure, gas-liquid mixed after the electric expansion valve throttling; To outdoor heat exchanger, get back to compressor through cross valve through connecting leg again; Unit is when running refrigerating pattern or heating mode; Electric expansion valve is regulated according to the actual degree of superheat of compressor low pressure air suction mouth: when the actual degree of superheat during less than the target degree of superheat of regulation, the electric expansion valve of controlling all indoor sets that are in refrigeration mode or heating mode reduces aperture by the variation of regulation; When the actual degree of superheat greater than the regulation the target degree of superheat time; The electric expansion valve that control is in the indoor set of refrigeration mode or heating mode increases aperture by the variation of stipulating; Be in poised state with this degree of superheat of guaranteeing compressor low pressure air suction mouth, make compressor under any operating mode can both safety operation; During the running refrigerating pattern, electric expansion valve also carries out auxiliary adjustment according to the degree of superheat of indoor set self simultaneously, with the distribution of the refrigerant amount between each indoor set of balance; Operation is during heating mode, and electric expansion valve also carries out auxiliary adjustment according to the degree of supercooling of indoor set self simultaneously, with the distribution of balance refrigerant amount between the machine in each.
CN201210036575XA 2012-05-01 2012-05-01 Water-cooling multi-connected unit and working manner thereof Pending CN102589048A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104266417A (en) * 2014-09-30 2015-01-07 宁波奥克斯电气有限公司 Refrigeration operating method of multi-split air conditioner in high temperature environment
CN108759008A (en) * 2018-06-12 2018-11-06 广东美的暖通设备有限公司 Control method, device and the air-conditioning with it of air-conditioning

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1084266A (en) * 1992-09-15 1994-03-23 王博 Refrigerating heat pump hot water apparatus
US20050086970A1 (en) * 2003-10-24 2005-04-28 Alexander Lifson Combined expansion device and four-way reversing valve in economized heat pumps
CN201293456Y (en) * 2008-10-21 2009-08-19 珠海格力电器股份有限公司 Air source heat pump type solar water heater
CN101865555A (en) * 2010-06-29 2010-10-20 广东志高空调有限公司 Multi-split air-conditioner capable of simultaneously refrigerating and heating

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1084266A (en) * 1992-09-15 1994-03-23 王博 Refrigerating heat pump hot water apparatus
US20050086970A1 (en) * 2003-10-24 2005-04-28 Alexander Lifson Combined expansion device and four-way reversing valve in economized heat pumps
CN201293456Y (en) * 2008-10-21 2009-08-19 珠海格力电器股份有限公司 Air source heat pump type solar water heater
CN101865555A (en) * 2010-06-29 2010-10-20 广东志高空调有限公司 Multi-split air-conditioner capable of simultaneously refrigerating and heating

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104266417A (en) * 2014-09-30 2015-01-07 宁波奥克斯电气有限公司 Refrigeration operating method of multi-split air conditioner in high temperature environment
CN108759008A (en) * 2018-06-12 2018-11-06 广东美的暖通设备有限公司 Control method, device and the air-conditioning with it of air-conditioning
CN108759008B (en) * 2018-06-12 2020-09-04 广东美的暖通设备有限公司 Control method and device of air conditioner and air conditioner with control device
US11333379B2 (en) 2018-06-12 2022-05-17 Hefei Midea Heating & Ventilating Equipment Co., Ltd. Air conditioner controlling method and apparatus and air conditioner having the same

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Application publication date: 20120718

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