CN101435629B - Screw type cold source hot water machine unit - Google Patents
Screw type cold source hot water machine unit Download PDFInfo
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- CN101435629B CN101435629B CN2008102198810A CN200810219881A CN101435629B CN 101435629 B CN101435629 B CN 101435629B CN 2008102198810 A CN2008102198810 A CN 2008102198810A CN 200810219881 A CN200810219881 A CN 200810219881A CN 101435629 B CN101435629 B CN 101435629B
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- expansion valve
- hot water
- heat exchanger
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Abstract
The invention relates to a structure for a screw type cold source hot water unit, which comprises a compressor, a condensing heat exchanger, a dry filter, a thermostatic expansion valve, an evaporative heat exchanger, a first high-temperature expansion valve, a second high-temperature expansion valve and a solenoid valve, wherein an outlet and an inlet which are circularly connected with hot water on a user side are arranged on the condensing heat exchanger; an outlet and an inlet which are circularly connected with a cold source on the user side are arranged on the evaporative heat exchanger; the first high-temperature expansion valve and the second high-temperature expansion valve are connected in parallel to a liquid pipeline between the dry filter and the thermostatic expansion valve; and the other end of the first high-temperature expansion valve is connected with a port of a compressor chamber of the compressor, and the other end of the second high-temperature expansion valve is connected with a port of a motor end of the compressor through the solenoid valve. The structure for the screw type cold source hot water unit realizes the functions of two models of a screw type water chilling unit and a screw type water source heat pump unit in a model. Simultaneously the screw type cold source hot water unit can provide hot water with a temperature between 20 and 60 DEG C and a coolant with a temperature between 15 DEG C below zero and 25 DEG C due to combination of the first high-temperature expansion valve and the second high-temperature expansion valve.
Description
Technical field
The present invention relates to a kind of new screw formula cold source hot water machine group, belong to the improvement technology of screw-type water chiller and screw water source heat pump units.
Background technology
The type that screw-type water chiller or the such simple function of screw water source heat pump units are only arranged at present, on the market.The cold water side outlet temperature scope of screw-type water chiller is between 5～15 ℃, between 40～50 ℃ of the screw water source heat pump units hot water outlet temperature ranges.These two kinds of types only can satisfy the instructions for use of common air-conditioning operating mode, can not satisfy in worker, the commerce low-temperature receiver side temperature below 5 ℃, and the hot water side temperature are in the requirement more than 50 ℃.For example, the disclosed monoblock type screw chiller of Chinese patent CN2874362 group, adopt evaporative condenser to replace traditional water cooled condenser, the air that sucks or be pressed into by cooling blower in condenser is realized the evaporation of water that circulates, the mechanism of utilizing water evaporation to absorb heat reduces the temperature of the inner refrigerant pipeline of condenser, thus finally realize and refrigerant between heat exchange.It equally only has single function, and low-temperature receiver and hot water can't be provided simultaneously.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of screw type cold source hot water machine group, and the function of screw-type water chiller and two kinds of types of screw water source heat pump units is realized in a kind of type.
Another technical problem that the present invention will solve is when improving the hot water outlet temperature of hot water circuit and reducing the low-temperature receiver outlet temperature of low-temperature receiver circulation, the stable operation of assurance security of system.
The screw type cold source hot water machine group realizes that the technical scheme of above-mentioned purpose is: a kind of screw type cold source hot water machine group, comprise the refrigerant circulation circuit that is in turn connected to form by compressor, condensing heat exchanger, device for drying and filtering, heating power expansion valve, evaporating heat exchanger, it is characterized in that: described condensing heat exchanger is provided with the entry and exit that are connected with the user side hot water circuit; Described evaporating heat exchanger is provided with the entry and exit that are connected with the circulation of user side low-temperature receiver.Described screw type cold source hot water machine group also comprises first high temperature expansion valve, second high temperature expansion valve, magnetic valve; First high temperature expansion valve, second high temperature expansion valve are connected on the liquid pipeline between device for drying and filtering and the heating power expansion valve; The other end of first high temperature expansion valve is connected to the discharge chambe interface of compressor; The other end of second high temperature expansion valve is connected to the motor side interface of compressor through magnetic valve.
Hot water temperature's scope of the hot water outlet of described condensing heat exchanger is 20～60 ℃; The refrigerant temperature scope of evaporating heat exchanger low-temperature receiver outlet is-15～25 ℃.
The refrigerating medium of described low-temperature receiver circulation can be water or ethylene glycol solution.
New screw formula cold source hot water machine group provided by the invention realizes the function of two kinds of machine shapes smoothly in a kind of machine shape, enlarge its range of operation, make it possess plurality of operating modes, can freely switch according to demand, and, the hot water outlet temperature of new screw formula cold source hot water machine group can be between 20～60 ℃, and low-temperature receiver is surveyed the refrigerating medium outlet temperature and can be regulated arbitrarily in the scope between-15～25 ℃, and unit is reliable, stable operation.Thereby realize the demand of multiple worker, firm industry to hot water and low-temperature receiver, the user can use low-temperature receiver separately, also can use hot water separately, more can low-temperature receiver, hot water uses simultaneously.Simultaneously, ability can realize step-less adjustment according to demand, for a long time low-load range still can be reliably, stable operation, improve the low temperature heat production water yield down, and guarantee that runnability is stablized at low temperatures.
Description of drawings
Accompanying drawing 1 is a principle schematic of the present invention.
The specific embodiment
Below in conjunction with drawings and Examples screw type cold source hot water machine group provided by the present invention is further described.
Referring to Fig. 1, screw type cold source hot water machine group of the present invention, comprise that compressor 1, condensing heat exchanger 2, device for drying and filtering 3, heating power expansion valve 4, first high temperature expansion valve 5, second high temperature expansion valve 6, magnetic valve 7, evaporating heat exchanger 8 connect successively, wherein first high temperature expansion valve 5, second high temperature expansion valve 6 are connected on the liquid pipeline between device for drying and filtering 3 and the heating power expansion valve 4; The other end of first high temperature expansion valve 5 is connected to the discharge chambe interface of compressor 1; The other end of second high temperature expansion valve 6 is connected to the motor side interface of compressor 1 through magnetic valve 7.Form refrigerant circulation circuit by compressor 1, condensing heat exchanger 2, device for drying and filtering 3, heating power expansion valve 4, evaporating heat exchanger 8; Low-temperature receiver refrigerating medium and evaporating heat exchanger 8 carry out heat exchange, export 9 places at evaporating heat exchanger 8 low-temperature receivers low-temperature receiver is provided; Cooling water and condensing heat exchanger 2 carry out heat exchange, provide hot water at hot water outlet 10 places of condensing heat exchanger 2.First high temperature expansion valve 5, second high temperature expansion valve 6, magnetic valve 7 are realized safe and reliable operation by the control to the different operating conditions of compressor.Thereby realize that hot water outlet 10 hot water temperatures of place can be between 20～60 ℃, low-temperature receiver exports 9 place's refrigerant temperatures and can scope move between-15～25 ℃, and low-temperature receiver and hot water can utilize simultaneously.At different load, all reliable, stable operation under the different temperatures, and temperature control is accurately.Wherein the refrigerating medium that adopted of low-temperature receiver circulation can make water or ethylene glycol respectively.
The course of work of cold source hot water machine group of the present invention is as follows: compressor 1 discharges HTHP refrigerant Compressed Gas less than limit value, enter condensing heat exchanger 2 carries out heat exchange with user's hot-water heating system, and hot water outlet 10 place's hot water are reached between 20～60 ℃; Enter condensing heat exchanger 2 HTHP refrigerant Compressed Gas through carrying out being condensed into highly pressurised liquid after the heat exchange with the user side hot-water heating system, after device for drying and filtering 3 filtrations, the refrigerating medium (can make water, ethylene glycol respectively) that enters evaporating heat exchanger 8 and user side after heating power expansion valve 4, the throttling of flowing through carries out heat exchange, and the user side refrigerating medium is reached between-15～25 ℃.The refrigerant vapor that carries out heat exchange at the refrigerating medium of evaporating heat exchanger 8 and user side enters compressor, compresses once more, forms the refrigerant circulation.
Generally, when user side hot water is higher than conventional the application, or the user side refrigerating medium is when being lower than conventional the application, compressor 1 delivery temperature can be higher than the compressor limit value, when the user side refrigerating medium is lower than conventional the application, compressor 1 motor section branch is because of the decline of cold medium flux, and cooling is not enough and it is overheated to occur.Can't satisfy the instructions for use of compressor during conventional the application.And cold source hot water machine group of the present invention increases by first high temperature expansion valve 5 and second high temperature expansion valve 6; When compressor 1 delivery temperature during greater than limit value, the 5 unlatching work of first high temperature expansion valve, when being lower than limit value, first high temperature expansion valve 5 is closed, and is used for the discharge chambe of cooling compressor 1, and the control compressor operating is in normal range (NR).Equally, second high temperature expansion valve 6 is used for the motor part of cooling compressor, prevents that motor from occurring unusually because of overheated.
Claims (3)
1. screw type cold source hot water machine group, comprise the refrigerant circulation circuit that is in turn connected to form by compressor (1), condensing heat exchanger (2), device for drying and filtering (3), heating power expansion valve (4), evaporating heat exchanger (8), it is characterized in that: described condensing heat exchanger (2) is provided with the entry and exit that are connected with the user side hot water circuit; Described evaporating heat exchanger (8) is provided with the entry and exit that are connected with the circulation of user side low-temperature receiver; Described screw type cold source hot water machine group also comprises first high temperature expansion valve (5), second high temperature expansion valve (6), magnetic valve (7); First high temperature expansion valve (5), second high temperature expansion valve (6) are connected on the liquid pipeline between device for drying and filtering (3) and the heating power expansion valve (4); The other end of first high temperature expansion valve (5) is connected to the discharge chambe interface of compressor (1); The other end of second high temperature expansion valve (6) is connected to the motor side interface of compressor (1) through magnetic valve (7).
2. screw type cold source hot water machine group according to claim 1 is characterized in that: hot water temperature's scope of the hot water outlet (10) of described condensing heat exchanger (2) is 20～60 ℃; The refrigerant temperature scope of evaporating heat exchanger (8) low-temperature receiver outlet (9) is-15～25 ℃.
3. screw type cold source hot water machine group according to claim 1 is characterized in that: the refrigerating medium of described low-temperature receiver circulation is water or ethylene glycol solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102198810A CN101435629B (en) | 2008-12-12 | 2008-12-12 | Screw type cold source hot water machine unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102198810A CN101435629B (en) | 2008-12-12 | 2008-12-12 | Screw type cold source hot water machine unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101435629A CN101435629A (en) | 2009-05-20 |
| CN101435629B true CN101435629B (en) | 2010-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008102198810A Expired - Fee Related CN101435629B (en) | 2008-12-12 | 2008-12-12 | Screw type cold source hot water machine unit |
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| Country | Link |
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| CN (1) | CN101435629B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108109818A (en) * | 2017-11-08 | 2018-06-01 | 张市伟 | A kind of industrial transformers refrigerating plant |
| CN108036535A (en) * | 2017-12-06 | 2018-05-15 | 安徽睿知信信息科技有限公司 | A kind of structure of screw type cold source hot water machine group |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001090663A1 (en) * | 2000-05-26 | 2001-11-29 | Thermal Energy Accumulator Products Pty Ltd | A multiple-use super-efficient heating and cooling system |
| CN2884059Y (en) * | 2006-03-13 | 2007-03-28 | 佛山市顺德区容桂德舜冷气工程有限公司 | Cold/hot parallel type cold water supply set |
| CN201122016Y (en) * | 2007-12-11 | 2008-09-24 | 郑羽 | Air-cooling/water-cooling water heating/cooling unit |
-
2008
- 2008-12-12 CN CN2008102198810A patent/CN101435629B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001090663A1 (en) * | 2000-05-26 | 2001-11-29 | Thermal Energy Accumulator Products Pty Ltd | A multiple-use super-efficient heating and cooling system |
| CN2884059Y (en) * | 2006-03-13 | 2007-03-28 | 佛山市顺德区容桂德舜冷气工程有限公司 | Cold/hot parallel type cold water supply set |
| CN201122016Y (en) * | 2007-12-11 | 2008-09-24 | 郑羽 | Air-cooling/water-cooling water heating/cooling unit |
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| Publication number | Publication date |
|---|---|
| CN101435629A (en) | 2009-05-20 |
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Owner name: MEIDI GENERAL REFRIGERATION APPARATUS CO., LTD., C Free format text: FORMER OWNER: MEIDI ELECTRIC APPLIANCES CO., LTD., GUANGDONG Effective date: 20101222 |
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Free format text: CORRECT: ADDRESS; FROM: 528311 MIDEA GROUP CO., LTD., PENGLAI ROAD, BEIJIAO TOWN, SHUNDE DISTRICT, FOSHAN CITY, GUANGDONG PROVINCE TO: 401336 D9D20, TUOZHAN ZONE, YUMACHI INDUSTRIAL PARK, CHAYUAN NEW ZONE, NAN'AN DISTRICT, CHONGQING |
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Effective date of registration: 20101222 Address after: 401336 Development Zone, Yu Ma Chi Industrial Park, Xincheng District, tea garden, Nan'an District, Chongqing, D9D20 Patentee after: Chongqing Midea General Refrigerating Equipment Co., Ltd. Address before: 528311 Penglai Road, Beijiao Town, Shunde District, Guangdong, Foshan province Midea Group Co., Ltd. Patentee before: Meidi Electric Appliances Co., Ltd., Guangdong |
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| 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: 20100609 Termination date: 20191212 |