CN203298540U - Centrifugal chilling unit - Google Patents
Centrifugal chilling unit Download PDFInfo
- Publication number
- CN203298540U CN203298540U CN2013202709102U CN201320270910U CN203298540U CN 203298540 U CN203298540 U CN 203298540U CN 2013202709102 U CN2013202709102 U CN 2013202709102U CN 201320270910 U CN201320270910 U CN 201320270910U CN 203298540 U CN203298540 U CN 203298540U
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- China
- Prior art keywords
- economizer
- condenser
- liquid level
- restricting element
- motor
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Air Conditioning Control Device (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model provides a centrifugal chilling unit which is provided with novel restricting elements, and is large in adjustment range, and capable of more suitable for operating in an environment with large load fluctuation. The centrifugal chiller is mainly composed of a compressor, a condenser, an economizer and an evaporator. The condenser is connected with the economizer, the restricting element is arranged between the condenser and the economizer, the evaporator is connected with the economizer, the restricting element is arranged between the evaporator and the economizer, and each restricting element is formed by a pore plate and a plurality of motor-driven valves which are in parallel connection. The condenser and the economizer are provided with a condenser liquid level meter and an economizer liquid level meter respectively. According to the centrifugal chilling unit, proper motor-driven valves are selected as the restricting elements, so that the purposes that the adjustment range is wide and accurate are achieved, and the system can operate under a good state.
Description
Technical field
The utility model relates to a kind of refrigeration air-conditioner centrifugal chiller.
Background technology
Existing centrifugal refrigerating machines is on throttling is controlled, and useful orifice plate is as restricting element, and also useful electric expansion valve is as restricting element, and also useful orifice plate-electric expansion valve is as restricting element.Orifice plate during as restricting element, can not be regulated because of the aperture size, and the restriction characteristic of system can not remain at the best, and particularly during sub-load, ability and the load matched of orifice plate are bad; While utilizing electric expansion valve or orifice plate-electric expansion valve as restricting element, electronic expansion valve regulation cold is very little, accounts for 10% left and right of whole unit cold, and when load change was large, adjustable range was restricted.
Summary of the invention
The purpose of this utility model is to provide a kind of centrifugal refrigerating machines that novel throttle element and adjustable range more greatly, more can adapt to the environment operation that load fluctuation is large that has.
The utility model mainly is comprised of compressor, condenser, economizer, evaporimeter, and the technical scheme that solves its problem is that condenser is connected with economizer, between restricting element is set, evaporimeter is connected with economizer, between restricting element is set; Described restricting element is composed in parallel by orifice plate and several motor-driven valves; Condenser liquid level gauge and economizer liquid level gauge are set respectively on condenser and economizer.
By handpiece Water Chilling Units described in the utility model, select suitable motor-driven valve as restricting element, can arrive the wide and accurate purpose of adjustable range, the assurance system can moved under state preferably.
The accompanying drawing explanation
Fig. 1 is the utility model structural representation;
1 compressor, 2 condensers, 3 orifice plates, 4 motor-driven valves, 5 condenser liquid level gauges, 6 economizers, 9 economizer liquid level gauges, 10 evaporimeters, 11 hot gas bypass valves, 12 middle pressure valves in figure.
The specific embodiment
As shown in Figure 1, the connection for units described in the utility model moves schematic diagram.A kind of novel centrifugal type handpiece Water Chilling Units, comprise the compressor 1 that connects successively and form loop, condenser 2, restricting element orifice plate 3, motor-driven valve 4, condenser liquid level gauge 5, economizer 6, restricting element orifice plate 3, motor-driven valve 4, economizer liquid level gauge 9, evaporimeter 10, this loop are the major loop of centrifugal refrigerating machines, and 11 and 12 are respectively hot gas bypass valve and middle pressure valve.
Motor-driven valve 4 is subjected to respectively condenser controlled by liquid level 5 and economizer liquid level gauge 9.The target liquid level of condenser 2 and economizer 6 is set respectively in controller, condenser is subjected to liquid level 5 and economizer liquid level gauge 9 to feed back at any time the actual liquid level signal to controller, through PID, regulates, and controls the switch of motor-driven valve 4, accurately liquid level is controlled to desired value.When actual liquid level, during higher than the target liquid level, control motor-driven valve and open greatly, otherwise, turn down motor-driven valve.If in condenser, liquid level is high, the coolant quantity after motor-driven valve leaves greatly from the condenser to the economizer increases, thereby reduces the liquid level in condenser; If in condenser, liquid level is low, the coolant quantity after motor-driven valve turns down from the condenser to the economizer reduces, thereby improves the liquid level in condenser.Liquid level in economizer is controlled identical with condenser.
In working order, from compressor 1 high temperature and high pressure gas out, enter condenser 2, in condenser 2, be condensed into highly pressurised liquid, through restricting element orifice plate 3, motor-driven valve 4, condenser liquid level gauge 5, enter economizer 6, from economizer refrigerant out, a part of gaseous state enters compressor 1 and compresses, and a part of liquid state is passed through restricting element orifice plate 3, motor-driven valve 4 again, economizer liquid level gauge 9 enters evaporimeter 10 and is evaporated, and the gas after evaporation is inhaled into compressor 1.Away from the surge area of compressor 1, increased from condenser 2 to evaporimeter by 10 hot-gas bypass pipeline when guaranteeing underload.
This example is two stages of compression, through twice orifice plate 3 and motor-driven valve 4 throttlings.In the system running, orifice plate and motor-driven valve are main throttle part, according to the actual requirements, can select the size of motor-driven valve, during with the decision design, pass through the ratio of the flow of motor-driven valve to total flow.The general flow of selecting motor-driven valve to pass through accounts for 50% left and right of total flow.
Claims (1)
1. a centrifugal refrigerating machines, mainly be comprised of compressor, condenser, economizer, evaporimeter, it is characterized in that, condenser is connected with economizer, between restricting element is set, evaporimeter is connected with economizer, between restricting element is set; Described restricting element is composed in parallel by orifice plate and several motor-driven valves; Condenser liquid level gauge and economizer liquid level gauge are set respectively on condenser and economizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202709102U CN203298540U (en) | 2013-05-17 | 2013-05-17 | Centrifugal chilling unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202709102U CN203298540U (en) | 2013-05-17 | 2013-05-17 | Centrifugal chilling unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203298540U true CN203298540U (en) | 2013-11-20 |
Family
ID=49574545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202709102U Expired - Fee Related CN203298540U (en) | 2013-05-17 | 2013-05-17 | Centrifugal chilling unit |
Country Status (1)
| Country | Link |
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| CN (1) | CN203298540U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103591740A (en) * | 2013-12-06 | 2014-02-19 | 烟台蓝德空调工业有限责任公司 | Throttling device for centrifugal heat pump unit |
| CN104235988A (en) * | 2014-10-16 | 2014-12-24 | 珠海格力电器股份有限公司 | Centrifugal air conditioner unit with water as refrigerants and running method |
| CN106766441A (en) * | 2015-11-25 | 2017-05-31 | 开利公司 | Refrigeration system and its throttling control method |
| CN111981719A (en) * | 2020-08-24 | 2020-11-24 | 珠海格力电器股份有限公司 | Refrigerating unit compression refrigeration cycle control method and device and refrigerating unit |
| CN112665225A (en) * | 2020-12-22 | 2021-04-16 | 珠海格力电器股份有限公司 | Throttle control device, heat pump centrifugal unit and air conditioning system |
| US11365921B2 (en) | 2015-09-18 | 2022-06-21 | Carrier Corporation | System and method of freeze protection for a chiller |
-
2013
- 2013-05-17 CN CN2013202709102U patent/CN203298540U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103591740A (en) * | 2013-12-06 | 2014-02-19 | 烟台蓝德空调工业有限责任公司 | Throttling device for centrifugal heat pump unit |
| CN104235988A (en) * | 2014-10-16 | 2014-12-24 | 珠海格力电器股份有限公司 | Centrifugal air conditioner unit with water as refrigerants and running method |
| US11365921B2 (en) | 2015-09-18 | 2022-06-21 | Carrier Corporation | System and method of freeze protection for a chiller |
| CN106766441A (en) * | 2015-11-25 | 2017-05-31 | 开利公司 | Refrigeration system and its throttling control method |
| US11365916B2 (en) | 2015-11-25 | 2022-06-21 | Carrier Corporation | Refrigeration system and throttle control method therefor |
| CN111981719A (en) * | 2020-08-24 | 2020-11-24 | 珠海格力电器股份有限公司 | Refrigerating unit compression refrigeration cycle control method and device and refrigerating unit |
| CN111981719B (en) * | 2020-08-24 | 2021-12-14 | 珠海格力节能环保制冷技术研究中心有限公司 | Refrigerating unit compression refrigeration cycle control method and device and refrigerating unit |
| CN112665225A (en) * | 2020-12-22 | 2021-04-16 | 珠海格力电器股份有限公司 | Throttle control device, heat pump centrifugal unit and air conditioning system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131120 |