CN202675731U - Dual-path pre-cooling high-efficiency heat pump device - Google Patents
Dual-path pre-cooling high-efficiency heat pump device Download PDFInfo
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- CN202675731U CN202675731U CN 201220380523 CN201220380523U CN202675731U CN 202675731 U CN202675731 U CN 202675731U CN 201220380523 CN201220380523 CN 201220380523 CN 201220380523 U CN201220380523 U CN 201220380523U CN 202675731 U CN202675731 U CN 202675731U
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Abstract
The utility model discloses a dual-path pre-cooling high-efficiency heat pump device which comprises a heat collection evaporator, a compressor, a condenser, an expansion valve, a main control valve, a precooler, a cold water inlet control valve and an operation control device, wherein the outlet of the heat collection evaporator is connected with the inlet of the main control valve; two outlets of the main control valve are connected in parallel with two loops; the tails ends of the two loops converge with each other and are connected with the inlet of the compressor; the outlet end of the compressor is sequentially connected with the condenser and the expansion valve; the expansion valve is connected with the inlet of the heat collection evaporator; the outlet of the heat collection evaporator and the outlet of the compressor are provided with a refrigerant pressure/temperature sensor; the signal output end of the sensor is connected with the signal input end of the operation control device; and the control signal output end of the operation control device is electrically connected with the main control valve and the cold water inlet control valve. The dual-path pre-cooling high-efficiency heat pump device can be reliably operated for a long time in a hot season or a high-temperature environment, the benefits of the heat pump device can be improved, and the device is particularly suitable for a heat pump system with varied operating conditions.
Description
Technical field
The utility model is a kind of efficient heat pump device of two-way precooling, being particularly related to a kind of condition of work changes on a large scale, change and the intensity of solar radiation variation such as annual summer and winter temperature, or the two-way precooling heat pump installation of external high temperature changes in environmental conditions, belong to the innovative technology of heat pump assembly.
Background technology
In recent years, along with improving constantly of China's rapid development of economy and living standards of the people, family and commercial with in the energy resource consumption, the shared proportion of hot water increases day by day.The solar heat pump and water heating system can satisfy productive life to the demand of hot water with lower energy consumption, because the distinguishing feature of its energy-saving and environmental protection more and more is subject to extensive concern.But intensity of solar radiation has seasonal variations; the heat pump ubiquity of operating condition design the excessively abundant problem of evaporation heat in summer according to season in spring and autumn; bring heat pump excessive discharge temperature in summer; cause high temperature protection; frequent start-stop; decrease in efficiency, the problems such as life-span reduction, even can't work.Therefore the ordinary hot pumping system can't satisfy the function of the efficient operation of summer condition.The heat pump of working under the high temperature also has same problem.
Ubiquity fluctuation of service when compressor moves under bad working environments, the defectives such as life-span reduction generally can adopt high temperature protection and high pressure protector, make compressor out of service after delivery temperature or pressure at expulsion arrival certain parameter, ensure that it is not endangered.Need to satisfy the heat pump hot-water system of whole year operation requirement, off-design operating mode greatly when working hot season easily causes stoppage protection, thereby the high temperature heat source of waste comparative good-quality causes operational efficiency to reduce.For making the heat pump can efficient in strong solar radiation or hot environment, stable, reliably operation, many technical researches and improvement have been carried out both at home and abroad.The variable conpacitance compressor technology is the most directly perceived, and the technology that application surface is the widest has also obtained numerous achievements in the high temperature heat pump field.Utilizing the connection in series-parallel of multiple compressors, is the effective workaround of realizing the system stable operation under the variable working condition.The large temperature difference compression type heat of a kind of plural serial stage pump assembly of Tsing-Hua University's utility model, Chinese utility model patent 200710099607.X adopts the multi-stage condensing device, evaporimeter, the train of compressor and corresponding cut-off equipment, the high level of the realization coefficient of performance improves comprehensive energy efficiency; Chinese Academy of Sciences's Guangzhou energy utility model patent " high temperature heat pump refrigeration unit ", China Patent No. 02226245.8, adopt many heat pump refrigerating units to combine unit, the circulatory system is independent but share water system, no matter heating operation or refrigerating operaton can both be exported high-temperature-hot-water, can satisfy different needs, the utility model patent of Tsing-Hua University " high-temperature heat-pump water-heater ", China Patent No. 200420064269.8, adopt multiple capillary or electric expansion valve to realize throttling, the control module that is formed by CPU fuzzy control unit and electrical equipment and augmentation of heat transfer select water-change pump, realize the optimal control under the different atmospheric temperatures, have a leaving water temperature high, the advantages such as energy-conservation and Compressor Discharge Pressure is low.Generally speaking, these technology can both well solve Systems balanth operation problem under the variable working condition condition, but a plurality of compressor connection in series-parallel are had higher requirement to device in economy and aspect safeguarding.
Summary of the invention
The purpose of this utility model is to consider the problems referred to above and a kind of reduction installation cost is provided, improves the efficient heat pump device of the two-way precooling of system effectiveness and reliability.The utility model is reasonable in design, and is convenient and practical.The utility model control is simple, easy to operate.
The technical solution of the utility model is: the efficient heat pump device of two-way precooling of the present utility model, include the thermal-arrest evaporimeter, compressor, condenser, expansion valve, main control valve, cooling water inlet, hot water outlet, forecooler, the cold water water inlet control valve, the refrigeration working medium pressure/temperature sensor, operating control device, the outlet of thermal-arrest evaporimeter links to each other with the entrance of main control valve, two outlets of main control valve are parallel with two loops, these two loops are respectively bypass circulation and loop that forecooler is housed, and the end in these two loops links to each other with the import of compressor after joining; The port of export of compressor connects condenser and expansion valve successively, and expansion valve is connected with the import of thermal-arrest evaporimeter; Cooling water inlet links to each other with the entrance of cold water water inlet control valve, and two outlets of cold water water inlet control valve are connected with the water inlet of condenser respectively and are connected with the water inlet of forecooler, and the delivery port of forecooler is connected with the water inlet of condenser; The outlet of thermal-arrest evaporimeter and the outlet of compressor are equiped with the refrigeration working medium pressure/temperature sensor, the signal output part of refrigeration working medium pressure/temperature sensor is connected with the signal input part of operating control device, and the control signal output of operating control device is electrically connected with main control valve and cold water water inlet control valve.
Above-mentioned expansion valve is electric expansion valve.
Above-mentioned thermal-arrest evaporimeter is the double-resource integrated efficient heat-collecting evaporimeter of direct-expansion type solar energy-air-source, or flat type solar heat collector, or the pressure-bearing dividing wall type heat exchanger.
Above-mentioned forecooler and condenser are plate type heat exchangers, or the pressure-bearing dividing wall type heat exchanger.
Above-mentioned main control valve and cold water water inlet control valve are triple valves, or respectively with two two-port valve combinations.
The utility model is started with the related of evaporator outlet temperature from reduction compressor air suction temperature; design feature and the Temperature Distribution characteristics of contact heat pump hot-water system; not only has the ordinary hot pump installation in performance and the function of annual operating mode; and can in hot season, stablize, move reliably; can significantly reduce the stoppage protection that high temperature brings; protect simultaneously heat pump assembly safety and life-span, operation has the higher coefficient of performance and heating capacity under worst hot case, improves the heat pump assembly benefit.Heat pump of the present utility model is heat pump compressor suction temperature control system, not only can satisfy performance and use under the annual operating mode, and can be in hot season or hot environment reliable, long-term operation, and has the higher coefficient of performance.The utility model proposes a kind of heat pump assembly and control method thereof of under strong solar radiation hot season or external high temperature environmental condition, utilizing the two-way precooling to keep efficient operation.This efficient heat pump device increases the loop quantity of heat pump assembly kind of refrigeration cycle; set up control module and forecooler; carry out the reasonable control of compressor air suction temperature; reduce the repeatedly shutdown of compressor under worst hot case; increasing substantially of the adjusting of realization system worst hot case and efficient increases heat pump assembly operation stability and service life.The utility model is that a kind of design is ingenious, function admirable, efficient heat pump device and the control method thereof of convenient and practical two-way precooling.
Description of drawings
Fig. 1 is the schematic diagram of common direct-expansion type heat pump hot-water system.
Fig. 2 is the schematic diagram of the efficient heat pump device system of the utility model two-way precooling.
Among the figure:
1. thermal-arrest evaporimeter; 2. compressor; 3. condenser; 4. expansion valve; 5. main control valve; 6. cooling water inlet; 7. hot water outlet; 8. forecooler; 9. cold water water inlet control valve; 10. refrigeration working medium pressure/temperature sensor; 11. operating control device.
The specific embodiment:
The efficient heat pump device of two-way precooling of the present utility model, include thermal-arrest evaporimeter 1, compressor 2, condenser 3, expansion valve 4, main control valve 5, cooling water inlet 6, hot water outlet 7, forecooler 8, cold water water inlet control valve 9, refrigeration working medium pressure/temperature sensor 10, operating control device 11, the outlet of thermal-arrest evaporimeter 1 links to each other with the entrance of main control valve 5, two outlets of main control valve 5 are parallel with two loops, these two loops are respectively bypass circulation and loop that forecooler 8 is housed, and the end in these two loops links to each other with the import of compressor 2 after joining; The port of export of compressor 2 connects condenser 3 and expansion valve 4 successively, and expansion valve 4 is connected with the import of thermal-arrest evaporimeter 1; Cooling water inlet 6 links to each other with the entrance of cold water water inlet control valve 9, and two outlets of cold water water inlet control valve 9 are connected with the water inlet of condenser 3 respectively and are connected with the water inlet of forecooler 8, and the delivery port of forecooler 8 is connected with the water inlet of condenser 3; The outlet of the outlet of thermal-arrest evaporimeter 1 and compressor 2 is equiped with refrigeration working medium pressure/temperature sensor 10, the signal output part of refrigeration working medium pressure/temperature sensor 10 is connected with the signal input part of operating control device 11, and the control signal output of operating control device 11 is electrically connected with main control valve 5 and cold water water inlet control valve 9.
Above-mentioned expansion valve 4 is electric expansion valves.
Above-mentioned thermal-arrest evaporimeter 1 is the double-resource integrated efficient heat-collecting evaporimeter of direct-expansion type solar energy-air-source, or flat type solar heat collector, or other pressure-bearing dividing wall type heat exchangers.
Above-mentioned forecooler 8 and condenser 3 are plate type heat exchangers, or other pressure-bearing dividing wall type heat exchangers.
Above-mentioned main control valve 5 and cold water water inlet control valve 9 are triple valves, or respectively with two two-port valve combinations.
The control method of the efficient heat pump device of the utility model two-way precooling is controlled according to two kinds of operating modes, and concrete control method is as follows:
1) in the operating mode in common season: when the admission pressure of system does not reach compressor high temperature protection value, finish the work of heating by thermal-arrest evaporimeter 1, compressor 2, condenser 3, electric expansion valve 4, main control valve 5, cooling water inlet 6, hot water outlet 7, this moment, operating control device 11 was controlled the work of two valves simultaneously: the ac path in the main control valve 5 is opened, and b closes; Ac path in the cold water water inlet control valve valve 9 is opened, b closes, cold-producing medium absorbs the gaseous state that becomes low-temp low-pressure behind the heat from solar radiation or air heat source or other thermal source in thermal-arrest evaporimeter 1, ac path in main control valve 5 enters compressor 2, be compressed into the gaseous refrigerant of HTHP, enter again condenser 3 and carry out heat exchange with the water to be heated that cooling water inlet 6 flows into, entered liquid state and the gaseous state mix refrigerant that expansion valve 4 reducing pressure by regulating flows become low-temp low-pressure after being condensed into cold anticyclone liquid, again enter thermal-arrest evaporimeter 1, finish heating circulation; Water to be heated flows out by hot water outlet 7 after cooling water inlet 6 is heated in condenser 3, realizes finishing in condenser 3 purpose of hot water preparing.
2) worst hot case: when the admission pressure of system near compressor high temperature protection value, finish the work of heating by thermal-arrest evaporimeter 1, main valve 2, compressor 2, condenser 3, expansion valve 4, cooling water inlet 6, hot water outlet 7 and forecooler 8, this moment, operating control device 11 was controlled the action of two valves simultaneously: the ab path in the main control valve 5 is opened, c closes, ab path in the cold water water inlet control valve 9 is opened, and c closes; From the gaseous working medium of thermal-arrest evaporimeter 1 forecooler 8 of flowing through, with the first heat exchange of water to be heated from cold water inlet 6, after the abundant heat absorption of the mistake of high-temperature vapour, enter again compressor 2, be compressed into the gaseous refrigerant of HTHP, then enter condenser 3 and again heat exchange of first heating water from forecooler 8, entered expansion valve 4 after being condensed into cold anticyclone liquid, reducing pressure by regulating flow becomes liquid state and the gaseous state mix refrigerant of low-temp low-pressure again, and again enter thermal-arrest evaporimeter 1, absorb the gaseous refrigerant that becomes high-temperature low-pressure from the heat of solar radiation or air heat source at this mixed state cold-producing medium, finish heating circulation.Water to be heated is introduced into forecooler 8 preliminary heat exchange through cooling water inlet 6, continues to flow out by hot water outlet 7 after the heat absorption in condenser 3 again, finishes the purpose of hot water preparing.
This heat pump assembly is under non-hot season operating mode, and forecooler does not put into operation, and the loop operation by the ordinary hot pump installation has performance and the function of ordinary hot pump installation; Strong or environment temperature is high when outdoor solar radiation, the heat pump fluctuation of service, when systematic function descends, heat pump assembly then starts forecooler, the ordinary hot pump work substance is heated the circulation that heats that circulation is converted into the control of heat pump compressor suction temperature, relation between reduction compressor air suction temperature and the evaporator outlet Temperature of Working, reduce the compressor air suction temperature, it is kept in the reasonable scope, effectively increased operation stability and the heating efficiency of system in the high temperature occasion, reduce compressor exhaust temperature, safeguards system stable operation.
In the efficient heat pump device of the two-way precooling that the utility model proposes, forecooler utilizes the cold water water inlet to absorb the harmful overheated of evaporator outlet working medium, keep the compressor air suction temperature stabilization in ideal range, with the heat-absorption water of crossing in the abundant heat transferred condenser, reasonable improved system, reduce installation cost, improve system effectiveness and reliability.
The efficient heat pump device of the two-way precooling that the utility model proposes, can use main control valve to regulate the flow portion of the refrigeration working medium that participates in middle heat exchange, to realize being higher than the above temperature range of standard condition to the adjusting of compressor air suction temperature, the coefficient of performance of the heat-pump water heater with this compressor air suction temperature control system and heating capacity are further improved.The heat pump assembly of two-way precooling of the present utility model is used for the solar heat pump that operation conditions change haves a wide reach, or solar energy-air energy heat pump, or the air-source of working under hot environment or water resource heat pump.
Supervisor's flow of the working medium that the utility model proposes and bypass pipe flow are regulated to realize that control procedure is realized by automaton by the aperture of main valve and by-passing valve.
Heat pump of the present utility model the related of compressor air suction temperature and evaporator outlet temperature that weakened; form heat pump compressor suction temperature control system; so that heat pump moves near remaining on design conditions; significantly reduce the stoppage protection that high temperature brings; not only has the ordinary hot pump installation in performance and the function of annual operating mode; can satisfy the instructions for use under the annual operating mode; and can be reliable in hot season or hot environment; long-term operation; and has a higher coefficient of performance; improve the heat pump assembly benefit; thereby be particularly useful for the changeable heat pump of operating condition, and such as solar heat pump, the situations such as the heat pump of whole year operation.
Claims (5)
1. the efficient heat pump device of a two-way precooling, it is characterized in that including thermal-arrest evaporimeter (1), compressor (2), condenser (3), expansion valve (4), main control valve (5), cooling water inlet (6), hot water outlet (7), forecooler (8), cold water water inlet control valve (9), refrigeration working medium pressure/temperature sensor (10), operating control device (11), the outlet of thermal-arrest evaporimeter (1) links to each other with the entrance of main control valve (5), two outlets of main control valve (5) are parallel with two loops, these two loops are respectively bypass circulation and the loop that forecooler (8) are housed, and the end in these two loops links to each other with the import of compressor (2) after joining; The port of export of compressor (2) connects condenser (3) and expansion valve (4) successively, and expansion valve (4) is connected with the import of thermal-arrest evaporimeter (1); Cooling water inlet (6) links to each other with the entrance of cold water water inlet control valve (9), two outlets of cold water water inlet control valve (9) are connected with the water inlet of condenser (3) respectively and are connected with the water inlet of forecooler (8), and the delivery port of forecooler (8) is connected with the water inlet of condenser (3); The outlet of the outlet of thermal-arrest evaporimeter (1) and compressor (2) is equiped with refrigeration working medium pressure/temperature sensor (10), the signal output part of refrigeration working medium pressure/temperature sensor (10) is connected with the signal input part of operating control device (11), and the control signal output of operating control device (11) is electrically connected with main control valve (5) and cold water water inlet control valve (9).
2. the efficient heat pump device of two-way precooling according to claim 1 is characterized in that above-mentioned expansion valve (4) is electric expansion valve.
3. the efficient heat pump device of two-way precooling according to claim 1, it is characterized in that above-mentioned thermal-arrest evaporimeter (1) is the double-resource integrated efficient heat-collecting evaporimeter of direct-expansion type solar energy-air-source, or flat type solar heat collector, or pressure-bearing dividing wall type heat exchanger.
4. the efficient heat pump device of two-way precooling according to claim 1 is characterized in that above-mentioned forecooler (8) and condenser (3) are plate type heat exchangers, or the pressure-bearing dividing wall type heat exchanger.
5. the efficient heat pump device of two-way precooling according to claim 1 is characterized in that above-mentioned main control valve (5) and cold water water inlet control valve (9) they are triple valves, or respectively with two two-port valve combinations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220380523 CN202675731U (en) | 2012-08-02 | 2012-08-02 | Dual-path pre-cooling high-efficiency heat pump device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220380523 CN202675731U (en) | 2012-08-02 | 2012-08-02 | Dual-path pre-cooling high-efficiency heat pump device |
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| CN202675731U true CN202675731U (en) | 2013-01-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220380523 Withdrawn - After Issue CN202675731U (en) | 2012-08-02 | 2012-08-02 | Dual-path pre-cooling high-efficiency heat pump device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102767921A (en) * | 2012-08-02 | 2012-11-07 | 广东工业大学 | Double-way pre-cooling efficient heat pump device and control method thereof |
| CN106524539A (en) * | 2016-12-22 | 2017-03-22 | 广东高而美制冷设备有限公司 | Solar and air heat exchanging system carrying out supercooling through natural convection of cold water and hot water |
| CN115218310A (en) * | 2022-08-01 | 2022-10-21 | 上海理工大学 | Temperature and humidity separate control multi-working-condition air conditioning system based on single-machine double-evaporation heat pump unit |
-
2012
- 2012-08-02 CN CN 201220380523 patent/CN202675731U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102767921A (en) * | 2012-08-02 | 2012-11-07 | 广东工业大学 | Double-way pre-cooling efficient heat pump device and control method thereof |
| CN102767921B (en) * | 2012-08-02 | 2014-11-05 | 广东工业大学 | Double-way pre-cooling efficient heat pump device and control method thereof |
| CN106524539A (en) * | 2016-12-22 | 2017-03-22 | 广东高而美制冷设备有限公司 | Solar and air heat exchanging system carrying out supercooling through natural convection of cold water and hot water |
| CN106524539B (en) * | 2016-12-22 | 2018-08-10 | 广东高而美制冷设备有限公司 | The solar-energy air-energy heat-exchange system being subcooled using hot and cold water free convection |
| CN115218310A (en) * | 2022-08-01 | 2022-10-21 | 上海理工大学 | Temperature and humidity separate control multi-working-condition air conditioning system based on single-machine double-evaporation heat pump unit |
| CN115218310B (en) * | 2022-08-01 | 2023-11-07 | 上海理工大学 | Temperature-humidity-division control multi-station air conditioning system based on single-machine double-evaporation heat pump unit |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130116 Effective date of abandoning: 20141105 |
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| RGAV | Abandon patent right to avoid regrant |