CN204593994U - A kind of device detecting cold-producing medium liquid storage amount in fluid reservoir - Google Patents
A kind of device detecting cold-producing medium liquid storage amount in fluid reservoir Download PDFInfo
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- CN204593994U CN204593994U CN201520074468.5U CN201520074468U CN204593994U CN 204593994 U CN204593994 U CN 204593994U CN 201520074468 U CN201520074468 U CN 201520074468U CN 204593994 U CN204593994 U CN 204593994U
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Abstract
A kind of device detecting cold-producing medium liquid storage amount in fluid reservoir, comprise the first high-pressure pressure sensor, the second high-pressure pressure sensor and fluid reservoir, described first high-pressure pressure sensor is located at the top of fluid reservoir, and the second high-pressure pressure sensor is located at the bottom of fluid reservoir; In the second embodiment, the bottom of fluid reservoir is connected with the first target stream switch by pipeline, and the top of fluid reservoir is connected with the second target stream switch by pipeline, and wherein the first target stream switch is all connected with magnetic valve by gathering tube with the second target stream switch; The device of cold-producing medium liquid storage amount in this detection fluid reservoir, detect cold-producing medium liquid storage amount in fluid reservoir by pressure sensor or target stream switch, and control its liquid level, to unit safety reliability service, and realize energy-conservation, tool is of great significance; The gas balance pipe at fluid reservoir top and flow control magnetic valve can eliminate gaseous coolant in fluid reservoir to the impact of cold-producing medium delivery pump.
Description
Technical field
The utility model relates to multi-online air-conditioning system field, especially a kind of device detecting cold-producing medium liquid storage amount in fluid reservoir.
Background technology
To multi-online air-conditioning system, fluid reservoir is one of parts important in unit, and its effect is used to store refrigerant, the refrigerant circulation in regulating system.When compressor fan-out capability is large, or indoor set load hour, the refrigerant circulation demand in system is few, needs unnecessary refrigerant storage in fluid reservoir.Otherwise if do not have fluid reservoir, in system, refrigerant circulation is too much, and system cloud gray model can be caused abnormal.
To the unit adopting kinetic pump refrigerant conveying, compressor and kinetic pump are exactly control it according to the refrigerant level in fluid reservoir to run, and the Liquid level in fluid reservoir is particularly important.Therefore during design system, need design to detect the device of cold-producing medium liquid storage amount in fluid reservoir, the correct liquid level detected in fluid reservoir, and the operation of compressor and delivery pump is controlled.
On the one hand, control refrigerant level, when liquid level reach a certain height, when namely cold-producing medium liquid storage amount reaches a certain amount of, cold-producing medium delivery pump opens refrigerant conveying to indoor set, freezes.When the liquid level detected is lower than certain setting liquid level, compressor is opened and is run, and realizes the intermitten service of compressor, reaches energy-conservation object.In addition on the one hand, need to prevent cavitation erosion from damaging delivery pump.A kind of device detecting cold-producing medium liquid storage amount in fluid reservoir is developed in design, and controls its liquid level, and to unit safety reliability service, and realize energy-conservation, tool is of great significance.
The device of existing detection refrigerant level, generally adopts fluid level transmitter.Liquid level gauge is arranged on fluid reservoir inside, when refrigerant level height change in fluid reservoir, causes its capacitance variations.It can convert the change of liquid level to standard current signal, passes to outdoor controller, controls opening/stopping, the ON/OFF of cold-producing medium delivery pump of compressor by controller.When liquid level controls the setting value of program well higher than controller, compressor shutdown, cold-producing medium delivery pump is in open state, and refrigerant conveying circulates.When liquid level controls the setting value of program well lower than controller, compressor is opened, and cold-producing medium delivery pump is in open state, and refrigerant conveying circulates.But liquid level gauge is arranged on fluid reservoir inside, and installation and maintenance are not convenient, and cost is high.Design a kind of installation and maintenance facility, cost is low, control simple checkout gear, be necessary very much.
At a certain temperature, when reducing pressure to pressure for vaporization at this temperature, liquid just produces steam bubble to liquid.The phenomenon of this generation bubble is called cavitation.Pump cavitation is the major reason that pump damages, and except producing except destruction flow passage components after pump produces and cavitates, also can produce noise and vibration, and cause pump performance to decline, and liquid in pump can be made to interrupt, cisco unity malfunction time serious.Make the efficiency of pump extracting liquid reduce in operation, significantly reduce pump lift and flow, decrease the service life of pump.Pump is on-stream, and the pressure of impeller internal is different, and inlet pressure is lower, and outlet pressure is higher.And the gasification temperature of liquid is related with pressure: pressure lower (or higher), corresponding gasification temperature is lower (or higher) also.If the regional area of its overcurrent part (normally impeller blade import somewhere after a while) is because certain reason, when the absolute pressure of pumping liquid reduces the vaporizing liquid pressure at temperature at that time, liquid just starts vaporization at this place, produce a large amount of steam, form bubble, when the higher-pressure region of the liquid containing a large amount of bubble forward in impeller, the highly pressurised liquid around bubble causes bubble to reduce sharp so that break.In water pump, produce process that bubble and bubbles burst make flow passage components be subjected to destroy is exactly cavitation process in pump.When pump works for a long time under cavitation condition, some place of pump flow passage components can suffer to degrade destruction, this is because bubble metal surface when condensing is subject to the intense impact of high frequency (60---2500Hz) liquid particle as sharp knife, what local pressure had may up to 49Mpa, cause metal surface to occur pit and perforation, time serious, metal grain loosens and peels off and present honeycomb.Cavitation erosion place mechanical force is outer also with Various Complex effects such as some solution, chemical attacks.Adopt adequate measure, avoid cavitation erosion problem, particularly important.
Utility model content
The utility model aims to provide a kind of by cold-producing medium liquid storage amount in pressure sensor or target stream switch detection fluid reservoir, and control its liquid level, to unit safety reliability service, and realize energy-conservation, the device of cold-producing medium liquid storage amount in the detection fluid reservoir that tool is of great significance.
For achieving the above object, the utility model provides following technical scheme: a kind of device detecting cold-producing medium liquid storage amount in fluid reservoir, comprise the first high-pressure pressure sensor, the second high-pressure pressure sensor and fluid reservoir, described first high-pressure pressure sensor is located at the top of fluid reservoir, and the second high-pressure pressure sensor is located at the bottom of fluid reservoir.
As further scheme of the present utility model: the position of described second high-pressure pressure sensor is higher than the position of cold-producing medium delivery pump.
As further scheme of the present utility model: described fluid reservoir top connects gas balance pipe, what the other end of gas balance pipe was connected to gas-liquid separator enters pipe, and this gas balance pipe is provided with flow control magnetic valve.
As further scheme of the present utility model: the bottom of described fluid reservoir is connected with the first target stream switch by pipeline, the top of fluid reservoir is connected with the second target stream switch by pipeline, and wherein the first target stream switch is all connected with magnetic valve by gathering tube with the second target stream switch.
Compared with prior art, the beneficial effects of the utility model are: the device of cold-producing medium liquid storage amount in this detection fluid reservoir, cold-producing medium liquid storage amount in fluid reservoir is detected by pressure sensor or target stream switch, and control its liquid level, to unit safety reliability service, and realizing energy-conservation, tool is of great significance; Pressure sensor and target stream switch are installed in fluid reservoir outside, and installation and maintenance are convenient, cost is low, control simple; The top Bonding pressure balance pipe of fluid reservoir, can eliminate the gaseous coolant of fluid reservoir shwoot to the impact of target stream switch, increases the stability of a system and service life; The gas balance pipe at fluid reservoir top and flow control magnetic valve can eliminate gaseous coolant in fluid reservoir to the impact of cold-producing medium delivery pump, avoid cavitation erosion, protection cold-producing medium delivery pump.
Accompanying drawing explanation
Fig. 1 is the multiple refrigeration unit schematic diagram of power pump refrigerant;
Fig. 2 is fundamental diagram of the present utility model;
Fig. 3 is the overall schematic of the present utility model in embodiment 2.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Embodiment 1
Refer to Fig. 1-2, in the utility model embodiment, a kind of device detecting cold-producing medium liquid storage amount in fluid reservoir, comprise the first high-pressure pressure sensor 101, second high-pressure pressure sensor 102, fluid reservoir 2, gas balance pipe 105 and flow control magnetic valve 107, described first high-pressure pressure sensor 101 is located at the top of fluid reservoir 2, second high-pressure pressure sensor 102 is located at the bottom of fluid reservoir 2, and the position of the second high-pressure pressure sensor 102 is higher than the position of cold-producing medium delivery pump 11; Described first high-pressure pressure sensor 101, second high-pressure pressure sensor 102 detects the top of fluid reservoir 2 and the pressure of bottom respectively, the pressure detected passes to outdoor controller, pressure differential is calculated by controller, thus calculate liquid level difference, calculate the liquid level in fluid reservoir 2 and refrigerant amount further; When liquid level reach a certain height, when namely cold-producing medium liquid storage amount reaches a certain amount of, cold-producing medium delivery pump 11 opens refrigerant conveying to indoor set, freezes.When the liquid level detected is lower than certain setting liquid level, compressor 14 is opened and is run, and realizes the intermitten service of compressor 14, when liquid level reaches certain setting height, compressor 14 is shut down, and only opens the conveying that cold-producing medium delivery pump 11 carries out cold-producing medium, reaches energy-conservation object; Described fluid reservoir 2 top drilling, connect gas balance pipe 105, what the other end of gas balance pipe 105 was connected to gas-liquid separator 13 enters pipe, avoid gaseous coolant in fluid reservoir 2 on the impact of cold-producing medium delivery pump 11, when compressor 14 operates, the gaseous coolant in fluid reservoir 2 can be sucked compressor 14 by gas balance pipe 105.Described gas balance pipe 105 is provided with flow control magnetic valve 107, when compressor 14 is opened, opens flow control magnetic valve 107, when compressor 14 cuts out, closes flow control magnetic valve 107, prevents the gaseous coolant in gas-liquid separator 13 from pouring in down a chimney in fluid reservoir 2.
Operation principle of the present utility model: when one or more indoor set receives the refrigeration start-up command sent from remote controller or line control machine, Centralized Controller, and this instruction is passed to off-premises station by connection.Running opened by the indoor set blower fan of start, and rotating speed runs according to the rotating speed of setting, and interior organic electronic expansion valve EEV1, EEV2, EEVn open the initial opening of a setting, then regulate according to the degree of superheat.Standby indoor set fan parking, electric expansion valve are closed.Now compressor 14 starts running; To air cooling heat exchanger, outdoor fan is opened, and to water cooling heat exchanger, water pump is opened; To source pump, cross valve is in not power-up state, off-premises station electric expansion valve PMV1, and PMV2 standard-sized sheet, namely electronic expansion valve opening reaches maximum.
After compressor 14 starts, cold-producing medium becomes the gaseous refrigerant of HTHP after compressor 14 compresses, flow through cross valve pipeline (to source pump), now cross valve is in not power-up state, the higher liquid refrigerant of pressure is become again through condenser 12 condensation, to air-cooled condenser 12, off-premises station rotation speed of fan carries out according to the high-pressure that high-pressure pressure sensor detects the rotating speed, the open/close state that control blower fan, also can control the rotating speed of blower fan according to coil temperature in the middle part of outdoor environment temperature or condenser 12.To source pump, now outer machine valve PMV1, PMV2 standard-sized sheet, not throttling, under pressure, enters in fluid reservoir 2 and stores.Cold-producing medium delivery pump 11 is opened, under the pumping of cold-producing medium delivery pump 11, flow of refrigerant is through the electric expansion valve of each indoor set, electric expansion valve carries out throttling to cold-producing medium, electric expansion valve controls according to the degree of superheat (Δ T=Te1-Te2) of pipe temperature Te1 and the Te2 of each indoor set, cold-producing medium after throttling evaporates in evaporimeter, the heat in absorption chamber environment, reaches the object of refrigeration.Heat absorption evaporation and become the lower steam of pressure and flow through cross valve through tracheae, enter gas-liquid separator 13, finally gets back to compressor 14.Thus complete kind of refrigeration cycle.
Embodiment 2
Refer to Fig. 3, the bottom of described liquid storage 5 tank 2 is connected with the first target stream switch 103 by pipeline, the top of fluid reservoir 2 is connected with the second target stream switch 104 by pipeline, and wherein the first target stream switch 103 is all connected with magnetic valve 106 by gathering tube with the second target stream switch 104.
During refrigeration, magnetic valve 106 is opened, when the first target stream switch 103 and the second target stream switch 104 detect flow of refrigerant, show that the refrigerant level in fluid reservoir 2 reaches certain setting value, now, shut down by compressor 14, cold-producing medium delivery pump 11 is in open state, refrigerant conveying circulates, reach refrigeration object, when the second target stream switch 104 detects flow of refrigerant, and the first target stream switch 103 does not detect flow of refrigerant, show that refrigerant level in fluid reservoir 2 is between the first target stream switch 103 and the second target stream switch 104, cold-producing medium delivery pump 11 runs, refrigerant conveying liquid, compressor 14 is opened and is run simultaneously.When the first target stream switch 103 and the second target stream switch 104 all do not detect flow of refrigerant, cold-producing medium delivery pump 11 stops, and compressor 14 runs.
To those skilled in the art, obvious the utility model is not limited to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present utility model or essential characteristic, can realize the utility model in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the utility model.Any Reference numeral in claim should be considered as the claim involved by limiting.
In addition, be to be understood that, although this description is described according to embodiment, but not each embodiment only comprises an independently technical scheme, this narrating mode of description is only for clarity sake, those skilled in the art should by description integrally, and the technical scheme in each embodiment also through appropriately combined, can form other embodiments that it will be appreciated by those skilled in the art that.
Claims (4)
1. one kind is detected the device of cold-producing medium liquid storage amount in fluid reservoir, comprise the first high-pressure pressure sensor (101), the second high-pressure pressure sensor (102) and fluid reservoir (2), it is characterized in that, described first high-pressure pressure sensor (101) is located at the top of fluid reservoir (2), and the second high-pressure pressure sensor (102) is located at the bottom of fluid reservoir (2).
2. a kind of device detecting cold-producing medium liquid storage amount in fluid reservoir according to claim 1, is characterized in that, the position of described second high-pressure pressure sensor (102) is higher than the position of cold-producing medium delivery pump (11).
3. a kind of device detecting cold-producing medium liquid storage amount in fluid reservoir according to claim 1, it is characterized in that, described fluid reservoir (2) top connects gas balance pipe (105), what the other end of gas balance pipe (105) was connected to gas-liquid separator (13) enters pipe, and this gas balance pipe (105) is provided with flow control magnetic valve (107).
4. a kind of device detecting cold-producing medium liquid storage amount in fluid reservoir according to claim 1, it is characterized in that, the bottom of described fluid reservoir (2) is connected with the first target stream switch (103) by pipeline, the top of fluid reservoir (2) is connected with the second target stream switch (104) by pipeline, and wherein the first target stream switch (103) is all connected with magnetic valve (106) by gathering tube with the second target stream switch (104).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520074468.5U CN204593994U (en) | 2015-02-03 | 2015-02-03 | A kind of device detecting cold-producing medium liquid storage amount in fluid reservoir |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520074468.5U CN204593994U (en) | 2015-02-03 | 2015-02-03 | A kind of device detecting cold-producing medium liquid storage amount in fluid reservoir |
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| CN204593994U true CN204593994U (en) | 2015-08-26 |
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| CN201520074468.5U Expired - Fee Related CN204593994U (en) | 2015-02-03 | 2015-02-03 | A kind of device detecting cold-producing medium liquid storage amount in fluid reservoir |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105674638A (en) * | 2016-01-06 | 2016-06-15 | 广东美的暖通设备有限公司 | Gas-liquid separator, air-conditioning system and control method for preventing liquid returning of compressor |
| CN107178932A (en) * | 2016-03-09 | 2017-09-19 | 宁波奈兰环境系统有限公司 | A kind of overlength distance conveys the high energy efficiency VRF Air Conditioning System of refrigerant |
| CN110145499A (en) * | 2019-06-19 | 2019-08-20 | 辽宁工业大学 | A kind of liquid storage booster jar and test method to eliminate low-temperature centrifugal pump cavitation phenomenons |
| CN112413942A (en) * | 2020-11-24 | 2021-02-26 | 珠海格力电器股份有限公司 | Air conditioning system and control method thereof |
| CN112413941A (en) * | 2020-11-24 | 2021-02-26 | 珠海格力电器股份有限公司 | Liquid pump system, air conditioning system and control method of liquid pump system |
| CN112413941B (en) * | 2020-11-24 | 2024-07-09 | 珠海格力电器股份有限公司 | Liquid pump system, air conditioning system, and control method for liquid pump system |
-
2015
- 2015-02-03 CN CN201520074468.5U patent/CN204593994U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105674638A (en) * | 2016-01-06 | 2016-06-15 | 广东美的暖通设备有限公司 | Gas-liquid separator, air-conditioning system and control method for preventing liquid returning of compressor |
| CN105674638B (en) * | 2016-01-06 | 2018-07-10 | 广东美的暖通设备有限公司 | Gas-liquid separator, air-conditioning system and anti-compressor return the control method of liquid |
| CN107178932A (en) * | 2016-03-09 | 2017-09-19 | 宁波奈兰环境系统有限公司 | A kind of overlength distance conveys the high energy efficiency VRF Air Conditioning System of refrigerant |
| CN110145499A (en) * | 2019-06-19 | 2019-08-20 | 辽宁工业大学 | A kind of liquid storage booster jar and test method to eliminate low-temperature centrifugal pump cavitation phenomenons |
| CN110145499B (en) * | 2019-06-19 | 2023-11-24 | 辽宁工业大学 | Liquid storage booster tank for eliminating cavitation phenomenon of low-temperature centrifugal pump and testing method |
| CN112413942A (en) * | 2020-11-24 | 2021-02-26 | 珠海格力电器股份有限公司 | Air conditioning system and control method thereof |
| CN112413941A (en) * | 2020-11-24 | 2021-02-26 | 珠海格力电器股份有限公司 | Liquid pump system, air conditioning system and control method of liquid pump system |
| CN112413941B (en) * | 2020-11-24 | 2024-07-09 | 珠海格力电器股份有限公司 | Liquid pump system, air conditioning system, and control method for liquid pump system |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150826 Termination date: 20200203 |
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| CF01 | Termination of patent right due to non-payment of annual fee |