CN102506502A - Heat-accumulation-type cascade-cycle water heating machine and control method thereof - Google Patents
Heat-accumulation-type cascade-cycle water heating machine and control method thereof Download PDFInfo
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- CN102506502A CN102506502A CN2011103198769A CN201110319876A CN102506502A CN 102506502 A CN102506502 A CN 102506502A CN 2011103198769 A CN2011103198769 A CN 2011103198769A CN 201110319876 A CN201110319876 A CN 201110319876A CN 102506502 A CN102506502 A CN 102506502A
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Abstract
The invention relates to a heat-accumulation-type cascade-cycle water heating machine, which comprises a low-temperature stage cycle assembly and a high-temperature stage cycle assembly. The low-temperature stage cycle assembly comprises an air-side heat exchanger, a low-temperature stage throttling valve and a low-temperature stage compressor which are sequentially connected with one another through pipes. The high-temperature stage cycle assembly comprises a high-temperature stage throttling valve, a water heat exchanger and a high-temperature stage compressor which are connected with one another through pipes. A heat-accumulation-type condensation evaporator is arranged at a position at which the high-temperature stage cycle assembly and the low-temperature stage cycle assembly are connected. A heat accumulator is arranged in the inner chamber of the heat-accumulation-type condensation evaporator. The low-temperature stage cycle assembly and the high-temperature stage cycle assembly realize cascade cycle through the heat-accumulation-type condensation evaporator. The control method comprises the steps of: 1) turning on the low-temperature stage cycle assembly to preheat the heat accumulator in the heat-accumulation-type condensation evaporator, and after certain time delta t, turning on the high-temperature stage cycle assembly; and 2) detecting the temperature Tm of the heat accumulator through a temperature sensor. The heat-accumulation-type cascade-cycle water heating machine has the characteristics of simple and reasonable structure, high energy-efficiency ratio, low cost and convenience in production.
Description
Technical field
The present invention relates to a kind of heat accumulating type overlapping circulating hot water machine and control method thereof, belong to the air source heat pump water heater technical field.
Background technology
Overlapping circulating hot water machine of the prior art, as shown in Figure 2, comprise low temperature level recirculation assembly and high temperature level recirculation assembly, high temperature level recirculation assembly and low temperature level recirculation assembly couple together through a condenser/evaporator 8 and realize the overlapping circulation.But there is following weak point in this structure: 1, when environment temperature was low, low temperature level recirculation assembly frosting can occur owing to from air, absorb heat; When the low temperature level defrosts, cause high temperature level recirculation assembly normal operation not produce hot water, and need carry out reverse circulation, provide heat to realize defrosting to the low temperature level.2, when environment temperature is high; Because low temperature level recirculation assembly can absorb great amount of heat from environment; And can surpass the needed heat demand of high temperature level recirculation assembly, cause high temperature level recirculation assembly and low temperature level recirculation assembly to carry out work simultaneously, in hot environment, utilize overlapping to circulate and produce hot water; The reliability of reduction system is deposited and security, is easy to generate potential safety hazard.Therefore, be necessary to do further improvement and perfect.
Summary of the invention
The object of the invention aims to provide a kind of simple and reasonable, Energy Efficiency Ratio is high, adult is cheap and applied widely heat accumulating type overlapping circulating hot water machine and control method thereof, to overcome weak point of the prior art.
A kind of heat accumulating type overlapping circulating hot water machine by this purpose design; Comprise the low temperature level recirculation assembly and the high temperature level recirculation assembly that are arranged on the main frame; Low temperature level recirculation assembly comprises the air-side heat exchanger that links to each other successively through pipeline; Low temperature level choke valve and low temperature stage compressor; High temperature level recirculation assembly comprises high temperature level choke valve, water-to-water heat exchanger and the high temperature stage compressor that links to each other successively through pipeline, and its architectural feature is that said high temperature level recirculation assembly and low temperature level recirculation assembly connecting place are provided with the heat accumulating type condenser/evaporator, is provided with heat storage in the inner chamber of heat accumulating type condenser/evaporator; Low temperature level recirculation assembly is through heat accumulating type condenser/evaporator and the circulation of high temperature level recirculation assembly overlapping.
The heat storage of said heat accumulating type condenser/evaporator is provided with temperature sensor; The number of temperature sensor is more than one, and temperature sensor controls the unlatching of low temperature level recirculation assembly or cuts out.
One side of said heat accumulating type condenser/evaporator links to each other with high temperature level choke valve and high temperature stage compressor, and water-to-water heat exchanger places between high temperature stage compressor and the high temperature level choke valve, and water-to-water heat exchanger is provided with and is attached thereto logical water inlet pipe and water outlet pipe; Be provided with low temperature level cross valve between low temperature stage compressor and the air-side heat exchanger; The opposite side of heat accumulating type condenser/evaporator links to each other with the c interface of low temperature level choke valve and low temperature level cross valve; The e interface of low temperature level cross valve links to each other with air-side heat exchanger; The two ends of low temperature stage compressor link to each other with the s interface and the d interface of low temperature level cross valve respectively, constitute a closed circuit jointly.
A kind of control method of heat accumulating type overlapping circulating hot water machine may further comprise the steps:
The present invention is through setting up the heat accumulating type condenser/evaporator; And utilize temperature sensor to detect the temperature of heat accumulating type condenser/evaporator, can under hot environment, control the unlatching of low temperature level recirculation assembly or close, behind the enough heat of heat storage storage; Low temperature level recirculation assembly can quit work; At this moment only high temperature level recirculation assembly needs consumes electric power, improves the main frame operational reliability, and can guarantee the main frame efficient operation; When simultaneously the heat of heat storage can make low temperature level recirculation assembly defrost, high temperature level recirculation assembly can normally move, when having overcome low temperature level recirculation assembly defrosting of the prior art, and high temperature level recirculation assembly problem such as must quit work; It has simple and reasonable, long service life, with low cost and be convenient to the characteristics of processing.
Description of drawings
Fig. 1 is an example structure sketch map of invention.
Fig. 2 is an overlapping circulating hot water machine structural representation in the prior art.
Among the figure: 1 is air-side heat exchanger, and 2 is low temperature level choke valve, and 3 is high temperature level choke valve, and 4 is water inlet pipe and water outlet pipe; 5 is water-to-water heat exchanger, and 6 is the high temperature stage compressor, and 7 is the low temperature stage compressor, and 8 is condenser/evaporator; 9 is the heat accumulating type condenser/evaporator, and 10 is temperature sensor, and 11 is low temperature level cross valve.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further described.
Referring to Fig. 1, this heat accumulating type overlapping circulating hot water machine comprises the low temperature level recirculation assembly and the high temperature level recirculation assembly that are arranged on the main frame.Low temperature level recirculation assembly is by the air-side heat exchanger 1 that links to each other successively through pipeline; Low temperature level choke valve 2 is formed with low temperature stage compressor 7; Be provided with low temperature level cross valve 11 between low temperature stage compressor 7 and the air-side heat exchanger 1; The e interface of low temperature level cross valve 11 links to each other with air-side heat exchanger 1, and the two ends of low temperature stage compressor 7 link to each other with the s interface and the d interface of low temperature level cross valve 11 respectively, constitute a closed circuit jointly; Through low temperature level cross valve 11 action that can commutate accurately, has automatic defrosting system to realize low temperature level recirculation assembly.High temperature level recirculation assembly is assembled by the high temperature level choke valve 3, water-to-water heat exchanger 5 and the high temperature stage compressor 6 that link to each other successively through pipeline; Water-to-water heat exchanger 5 is arranged between high temperature stage compressor 6 and the high temperature level choke valve 3; Water-to-water heat exchanger 5 is provided with and is attached thereto logical water inlet pipe and water outlet pipe 4, is convenient to user's water.
High temperature level recirculation assembly and low temperature level recirculation assembly connecting place are provided with heat accumulating type condenser/evaporator 9; One side of heat accumulating type condenser/evaporator 9 links to each other with high temperature level choke valve 3 and high temperature stage compressor 6, and water-to-water heat exchanger 5 is arranged between high temperature stage compressor 6 and the high temperature level choke valve 3.The opposite side of heat accumulating type condenser/evaporator 9 links to each other with the c interface of low temperature level choke valve 2 and low temperature level cross valve 11, and low temperature level recirculation assembly is through heat accumulating type condenser/evaporator 9 and the circulation of high temperature level recirculation assembly overlapping.Be provided with heat storage in the inner chamber of heat accumulating type condenser/evaporator 9; When low temperature level recirculation assembly needs defrosting at air-side heat exchanger 1; The cross valve action that commutates, the high-temperature high-pressure refrigerant that compressor is discharged is through getting into air-side heat exchanger 1 behind the cross valve, and the cold-producing medium after the cooling gets into heat accumulating type condenser/evaporator 9 after 2 throttlings of low temperature level choke valve; After absorbing the heat of vaporization of heat storage, cold-producing medium is got back to low temperature stage compressor 7.Owing to utilize the energy of heat storage phase transformation, the heat that the heat of heat storage not only can provide the evaporation of low temperature level recirculation assembly to need, the heat that also can provide the evaporation of high temperature level recirculation assembly to need.In the time of can guaranteeing that like this low temperature level recirculation assembly defrosts, high temperature level recirculation assembly can normally move, when having overcome low temperature level recirculation assembly of the prior art defrosting, and high temperature level recirculation assembly problem such as must quit work.
Because the non-constant width of ambient temperature range of hot water machine work, from-15 ℃ up to 43 ℃, and the difference of hot water effluent's temperature is brought the wide variation of high temperature level recirculation assembly condensation temperature.For suction temperature and the back pressure that guarantees high temperature level recirculation assembly compressor is unlikely to too high; The heat that high temperature level recirculation assembly absorbs from condenser/evaporator 8 changes with the variation of leaving water temperature; Low temperature level recirculation assembly need adopt the motor low or first gear of air-side heat exchanger 1 or stop the blower fan running for this reason; When environment temperature is higher; High temperature level recirculation assembly demand low in calories can not be satisfied even if the motor of air-side heat exchanger 1 shuts down, the reliability of high temperature level recirculation assembly will be influenced like this.Therefore the heat storage of heat accumulating type condenser/evaporator 9 is provided with temperature sensor 10, and the number of temperature sensor 10 is one or is a plurality of, to realize accurate control.
Operation principle of the present invention is: the unlatching through temperature sensor 10 control low temperature level recirculation assemblies or close; The air-side heat exchanger 1 of low temperature level recirculation assembly can run up; As much as possiblely from air, absorb heat, and be stored in the heat storage of heat accumulating type condenser/evaporator 9, through selecting the phase transition temperature of heat storage; Can control the evaporating temperature of high temperature level recirculation assembly, guarantee the operational reliability of high temperature level recirculation assembly.After heat storage stored enough heats, low temperature level recirculation assembly can quit work simultaneously, and at this moment only high temperature level recirculation assembly needs consumes electric power, and can guarantee the main frame efficient operation.
The control method of heat accumulating type overlapping circulating hot water machine may further comprise the steps:
Claims (4)
1. heat accumulating type overlapping circulating hot water machine; Comprise the low temperature level recirculation assembly and the high temperature level recirculation assembly that are arranged on the main frame; Low temperature level recirculation assembly comprises the air-side heat exchanger (1) that links to each other successively through pipeline; Low temperature level choke valve (2) and low temperature stage compressor (7); High temperature level recirculation assembly comprises high temperature level choke valve (3), water-to-water heat exchanger (5) and the high temperature stage compressor (6) that links to each other successively through pipeline, it is characterized in that said high temperature level recirculation assembly and low temperature level recirculation assembly connecting place are provided with heat accumulating type condenser/evaporator (9), are provided with heat storage in the inner chamber of heat accumulating type condenser/evaporator (9); Low temperature level recirculation assembly is through heat accumulating type condenser/evaporator (9) and the circulation of high temperature level recirculation assembly overlapping.
2. heat accumulating type overlapping circulating hot water machine according to claim 1 is characterized in that the heat storage of said heat accumulating type condenser/evaporator (9) is provided with temperature sensor (10); The number of temperature sensor (10) is more than one, and temperature sensor (10) controls the unlatching of low temperature level recirculation assembly or cuts out.
3. heat accumulating type overlapping circulating hot water machine according to claim 1 and 2; A side that it is characterized in that said heat accumulating type condenser/evaporator (9) links to each other with high temperature level choke valve (3) and high temperature stage compressor (6); Water-to-water heat exchanger (5) is arranged between high temperature stage compressor (6) and the high temperature level choke valve (3), and water-to-water heat exchanger (5) is provided with and is attached thereto logical water inlet pipe and water outlet pipe (4); Be provided with low temperature level cross valve (11) between low temperature stage compressor (7) and the air-side heat exchanger (1); The opposite side of heat accumulating type condenser/evaporator (9) links to each other with the c interface of low temperature level choke valve (2) and low temperature level cross valve (11); The e interface of low temperature level cross valve (11) links to each other with air-side heat exchanger (1); The two ends of low temperature stage compressor (7) link to each other with the s interface and the d interface of low temperature level cross valve (11) respectively, constitute a closed circuit jointly.
4. the control method of heat accumulating type overlapping circulating hot water machine according to claim 1 is characterized in that may further comprise the steps:
Step 1. is opened low temperature level recirculation assembly, and the heat storage in the heat accumulating type condenser/evaporator (9) is carried out preheating, behind Δ τ after a while, and unlatching high temperature level recirculation assembly;
Step 2. temperature sensor (10) detects the temperature T m of heat storage;
Step 3. compares the temperature T m that detects and the phase transition temperature TPCM of heat storage material, and as Tm >=TPCM+ Δ τ, then low temperature level recirculation assembly quits work; If Tm＜during TPCM-Δ τ, low temperature level recirculation assembly restarts work;
Step 4. is worked as high temperature level recirculation assembly and is quit work, and low temperature level recirculation assembly also quits work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011103198769A CN102506502A (en) | 2011-10-19 | 2011-10-19 | Heat-accumulation-type cascade-cycle water heating machine and control method thereof |
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| CN2011103198769A CN102506502A (en) | 2011-10-19 | 2011-10-19 | Heat-accumulation-type cascade-cycle water heating machine and control method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103673366A (en) * | 2012-09-14 | 2014-03-26 | 日立空调·家用电器株式会社 | Cascade refrigerating device |
| CN104101126A (en) * | 2014-07-25 | 2014-10-15 | 上海理工大学 | Continuous heat-supplying phase change energy storage overlapped type air source heat pump system and operation method thereof |
| JP2015183929A (en) * | 2014-03-24 | 2015-10-22 | サンデンホールディングス株式会社 | Heat pump type heating device |
| CN107477899A (en) * | 2017-09-21 | 2017-12-15 | 无锡职业技术学院 | A kind of water route coupling cascade formula low-temperature air-cooling heat pump system |
| CN109511272A (en) * | 2016-08-02 | 2019-03-22 | 三菱电机株式会社 | Heat pump assembly |
| CN111174388A (en) * | 2020-01-03 | 2020-05-19 | 珠海格力电器股份有限公司 | Operation control method and device, storage medium and multi-split system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103673366A (en) * | 2012-09-14 | 2014-03-26 | 日立空调·家用电器株式会社 | Cascade refrigerating device |
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| CN104101126A (en) * | 2014-07-25 | 2014-10-15 | 上海理工大学 | Continuous heat-supplying phase change energy storage overlapped type air source heat pump system and operation method thereof |
| CN104101126B (en) * | 2014-07-25 | 2017-01-25 | 上海理工大学 | Continuous heat-supplying phase change energy storage overlapped type air source heat pump system and operation method thereof |
| CN109511272A (en) * | 2016-08-02 | 2019-03-22 | 三菱电机株式会社 | Heat pump assembly |
| CN109511272B (en) * | 2016-08-02 | 2020-10-30 | 三菱电机株式会社 | Heat pump device |
| CN107477899A (en) * | 2017-09-21 | 2017-12-15 | 无锡职业技术学院 | A kind of water route coupling cascade formula low-temperature air-cooling heat pump system |
| CN107477899B (en) * | 2017-09-21 | 2023-10-13 | 无锡职业技术学院 | Waterway coupling overlapping type low-temperature air-cooled heat pump system |
| CN111174388A (en) * | 2020-01-03 | 2020-05-19 | 珠海格力电器股份有限公司 | Operation control method and device, storage medium and multi-split system |
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Address after: 528311 Foshan, Guangdong, Shunde District, Beijiao Town, Beijiao neighborhood Industrial Road, Penglai Applicant after: Guangdong Midea HVAC Equipment Co., Ltd. Address before: 528311 Beijiao, Guangdong, Shunde Town, Penglai Road, Industrial Avenue, Applicant before: Guangdong Midea HVAC Equipment Co., Ltd. |
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Application publication date: 20120620 |
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