CN108253626A - Heat pump waste heat two-way three-level cascade utilization hot water apparatus and its control method - Google Patents
Heat pump waste heat two-way three-level cascade utilization hot water apparatus and its control method Download PDFInfo
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- CN108253626A CN108253626A CN201810254247.4A CN201810254247A CN108253626A CN 108253626 A CN108253626 A CN 108253626A CN 201810254247 A CN201810254247 A CN 201810254247A CN 108253626 A CN108253626 A CN 108253626A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H4/00—Fluid heaters characterised by the use of heat pumps
- F24H4/02—Water heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B27/00—Machines, plants or systems, using particular sources of energy
- F25B27/02—Machines, plants or systems, using particular sources of energy using waste heat, e.g. from internal-combustion engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
- Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
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- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The present invention relates to heat recoveries and recycling field, disclose a kind of heat pump waste heat two-way three-level cascade utilization hot water apparatus and its control method, wastewater disposal basin, heat exchanger, the first evaporator and the second evaporator pass sequentially through pipeline F1 ~ F4 serial communications composition spent hot water's thermal energy three-level gradient using recovery system, and running water pipe, heat exchanger, the first condenser and the second condenser pass sequentially through pipeline Q1 ~ Q4 serial communications composition clear water three-level gradient-heated system.The present invention is recycled using the heat step to spent hot water, is realized to clear water stepped heating so that the recoverable wastewater flow of heat reaches 1 with clear water flow:1, as long as there is startup hot water, it is ensured that follow-up hot water circuit is uninterruptedly supplied, and the hot water temperature of circulation-supplied is consistent always with starting the temperature of hot water, product Energy Efficiency Ratio is obtained for heating capacity to be obviously improved, significant increase product cost and adaptability.
Description
Technical field
The present invention relates to heat from waste hot water recycling and recycle utilization technology field, more particularly to a kind of heat pump waste heat two-ways three
Grade cascade utilization hot water apparatus and its control method.
Background technology
A large amount of 33 DEG C ~ 36 DEG C of spent hot water can be generated during the bathing of user, at present in these spent hot waters
The recycling of heat is realized using water resource heat pump mostly, traditional water resource heat pump, for stable operation and guaranteed efficiency, evaporation
The inlet and outlet temperature difference of device will not design too high, so spent hot water's temperature drop is smaller, heat from waste hot water recycling is not thorough, the row of waste water
It is higher to put temperature, and clear water flow and wastewater flow ratio are usually 0.6 ~ 0.7, system water yield is few, heat recovery rate is low, and to
Ensure hot water supply, it is necessary to using electrical heating or air source heat pump ancillary equipment, cause to install and use is all extremely inconvenient, sternly
The promotion and popularization and use of the thermal energy recycling product of bath hot water are limited again.
Invention content
Goal of the invention：For problems of the prior art, the present invention provides a kind of heat pump waste heat two-way three-level step
Using hot water apparatus and its control method, heat that device and control method cooperation can be in step recycling bathing spent hot waters makes
The wastewater flow in the case where big flow is run is obtained to remain to reach 1 with clear water flow：1, the heat in fully recovering waste heat water, section
Save energy consumption.
Technical solution：The present invention provides a kind of heat pump waste heat two-way three-level cascade utilization hot water apparatus, including heat exchanger,
First evaporator, the second evaporator, the first compressor, the second compressor, the first condenser, the second condenser, wastewater disposal basin, originally
Water pipe, waste water pump, drainpipe and filtered water tank, the wastewater disposal basin, the heat exchanger, first evaporator and second evaporation
Device passes sequentially through pipeline F1, pipeline F2, pipeline F3 and pipeline F4 serial communications, and composition spent hot water's thermal energy three-level gradient utilizes back
Receipts system；The running water pipe, the heat exchanger, first condenser and second condenser pass sequentially through pipeline Q1,
Pipeline Q2, pipeline Q3 and pipeline Q4 serial communications form clear water three-level gradient-heated system；The waste water pump is arranged on the pipe
On road F1；First compressor, first condenser and first evaporator pass sequentially through pipeline M1, pipeline M2 and
Pipeline M3 connects and cycle connection；Second compressor, second condenser and second evaporator pass sequentially through
Pipeline N1, pipeline N2 connect and are recycled with pipeline N3 and connected；Second evaporator also passes through the pipeline F4 and the draining
Pipe connects, and second condenser is also connected by the pipeline Q4 with the filtered water tank.
Further, the heat pump waste heat two-way three-level cascade utilization hot water apparatus further includes the second valve, the 5th valve
Door and the 6th valve, second valve are mounted on the pipeline F1 and between the waste water pump and the heat exchanger,
5th valve is mounted on the pipeline F4 and between the drainpipe and second evaporator；6th valve
Door is mounted on the pipeline Q1 and between the running water pipe and the heat exchanger.
Further, the heat pump waste heat two-way three-level cascade utilization hot water apparatus further includes circulating flusher, institute
It states circulating flusher and includes circulating line, the first valve, third valve, the 4th valve and the 7th valve, the circulating line
It is sequentially connected in series and is followed by the part pipeline F1, pipeline F6, pipeline F3, pipeline F2, part the pipeline F1 and pipeline F5 head and the tail
Ring connection composition, and the circulating line by the waste water pump, second evaporator, first evaporator and described changes
Hot device is sequentially connected in series cycle connection, wherein, the both ends of the pipeline F5 are connected with the pipeline F1, and the wherein connection of one end
For point between first valve and the waste water pump, the tie point of the other end is located at second valve and the heat exchanger
Between；One end of the pipeline F6 is connected with the pipeline F1 and tie point be located at the waste water pump and second valve it
Between, the other end is connected with the pipeline F4 and tie point is between second evaporator and the 5th valve；Described
One valve is mounted on the pipeline F1 and between the waste water pump and the wastewater disposal basin；The third valve is mounted on institute
State on pipeline F5 and between the heat exchanger and the waste water pump, and the third valve be also located at second valve with
Between the heat exchanger；4th valve is mounted on the pipeline F6；7th valve is mounted on the circulating line
Filling opening at, the filling opening is located on the pipeline F5 and between the third valve and the waste water pump.
Further, the heat pump waste heat two-way three-level cascade utilization hot water apparatus further include the first temperature sensor,
Second temperature sensor, third temperature sensor and the 4th temperature sensor, first temperature sensor are mounted on the pipe
On road F1 and between the wastewater disposal basin and first valve, the second temperature sensor is mounted on the pipeline F4
And between the 5th valve and second evaporator, the third temperature sensor be mounted on the pipeline Q1 on and
Between the 6th valve and the heat exchanger, the 4th temperature sensor is mounted on the pipeline Q4 and positioned at institute
It states between filtered water tank and second condenser.First temperature sensor is used to detect the initial temperature of the spent hot water in wastewater disposal basin
T1, second temperature sensor are used to detect the final temperature T2 of waste water after thermal energy recycles, and third temperature sensor is used to detect certainly
Carry out the initial temperature T3 of the clear water in water pipe, the 4th temperature sensor is used to detect the final temperature T4 after clear water heating.
Further, the heat pump waste heat two-way three-level cascade utilization hot water apparatus further includes first flowmeter and second
Flowmeter, the first flowmeter be mounted on the pipeline Q4 it is upper and positioned at the filtered water tank and the 4th temperature sensor it
Between；The second flowmeter is mounted on the pipeline F4 and between the drainpipe and the second temperature sensor.
For detecting the clear water flow Q1 after heating, second flowmeter is used to detect the wastewater flow after thermal energy recycling first flowmeter
Q2。
Further, the heat pump waste heat two-way three-level cascade utilization hot water apparatus further includes by-pass line F7, described
One end of by-pass line F7 is connected with the pipeline F2, and the other end is connected with the pipeline F3.By-pass line F7 is used for extreme feelings
Supplement increases waste heat water flow under condition, to ensure that the final temperature of waste water not less than 4 DEG C, prevents heat exchanger from freezing, both reached most
Bigization recycles heat, and prevents recycling excessively freezing equipment, ensures that equipment can safe operation in any case.
Further, it is also equipped with the 8th valve on the by-pass line F7.The setting of 8th valve is convenient for passing through PLC
Controller controls the disconnection of by-pass line F7 with closure.
Further, first throttling device is additionally provided on the pipeline M2, the first gas is additionally provided on the pipeline M3
Liquid/gas separator；Second throttling device is additionally provided on the pipeline N2, the second gas-liquid separator is additionally provided on the pipeline N3.
Further, the heat pump waste heat two-way three-level cascade utilization hot water apparatus further includes PLC controller, first-class
Adjustable valve and second flow regulating valve, the PLC controller respectively with the first flow regulating valve, the second flow tune
Save the valve, first flowmeter, the second flowmeter, first temperature sensor, the second temperature sensor, described
Third temperature sensor, the 4th temperature sensor and the 8th valve signal connection, the first flow regulating valve
On the pipeline Q4 and between the first flowmeter and the filtered water tank, the second flow regulating valve installation
On the pipeline F4 and between the 5th valve and the second flowmeter.
It is described the present invention also provides a kind of control method of above-mentioned heat pump waste heat two-way three-level cascade utilization hot water apparatus
Hot water demand's temperature T0 and hot water demand's flow Q0 input by user is stored in PLC controller, the PLC controller is adopted automatically
Collect the temperature T1 of first temperature sensor, the temperature T2 of the second temperature sensor, the third temperature sensor
Temperature T3, the temperature T4 of the 4th temperature sensor, the flow Q1 of the first flowmeter and the second flowmeter
Flow Q2, and first flow regulating valve, the aperture of the second flow regulating valve, control institute according to above-mentioned each parameter regulation
The break-make of the 8th valve is stated, is carried out respectively control as follows：If a, Q1 is not equal to Q2, the first flow regulating valve is adjusted,
So that Q1 is equal to Q2, i.e. clear water flow：Wastewater flow is equal to 1：1；If b, T2 is less than or equal to 4 DEG C, described second is tuned up
The aperture of flow control valve, if the aperture of the second flow regulating valve opens the 8th valve up to 100% so that
T2 is greater than or equal to 4 DEG C；If c, T4 is more than T0, synchronization increases the first flow regulating valve and the second in proportion
The aperture of adjustable valve so that T4 is less than or equal to T0；But when the first flow regulating valve or the second flow regulating valve
Aperture up to when 100% stop adjust；If d, T2 is less than T0 more than 4 DEG C and T4 and the 8th valve is in open state,
Close the 8th valve；If e, T2 is less than T0 more than 4 DEG C and T4 and the 8th valve is in off status, synchronize on year-on-year basis
Example turns the aperture of the first flow regulating valve and the second flow regulating valve down so that T4 rises until equal to T0；But work as
Q1 or Q2 then stops adjusting when being less than or equal to Q0 so that：T4 ensures clear water flow, waste water stream while as possible close to T0
Amount is greater than or equal to Q0.
Advantageous effect：In heat pump waste heat two-way three-level cascade utilization hot water apparatus in the present invention, spent hot water passes through successively
The three-stage heat energy recycling of heat exchanger, the first evaporator and the second evaporator, after the thermal energy recycling of heat exchanger, 36 DEG C or so useless
Hot water can drop to 19 DEG C or so, and after the thermal energy recycling of the first evaporator, 19 DEG C or so of spent hot water can drop to 12 DEG C of left sides
The right side, most afterwards after the recycling of the thermal energy of the second evaporator, 12 DEG C or so of spent hot water can drop to 5 DEG C or so；On the contrary, clear water is successively
It is heated by the three-level of heat exchanger, the first condenser and the second condenser, after the heat exchange of heat exchanger, 8 DEG C or so of clear water energy
25 DEG C or so are enough warming up to, after the heating of the first condenser, 25 DEG C or so of clear water can be warming up to 34 DEG C or so, through second
After the heating of condenser, 34 DEG C or so of clear water can be warming up to 43 DEG C or so；Moreover, pass through heat pump waste heat two-way in the present invention
The control method of three-level cascade utilization hot water apparatus in clear water flow, wastewater flow in the case of 2.8T/h, can be realized useless
The minimum 4 DEG C of discharged at lower temperature of water not only spend the heat of energy cost heating all to be recycled, but also tap water in spent hot water
In a part of heat of itself also by " excess " recycle, it is even more important that aforementioned " excess " recycling on the basis of, realize
Clear water flow and wastewater flow 1：1, compared to common water resource heat pump or there is the water resource heat pump of preposition heat exchanger, this system can be real
The dynamic equilibrium of existing amount of hot water and yield, as long as there is startup hot water, it is ensured that the cycle of follow-up hot water is uninterruptedly supplied, and
The hot water temperature of circulation-supplied is consistent always with starting the temperature of hot water, and product Energy Efficiency Ratio and heating capacity, which have, significantly to be carried
It rises, significant increase product cost and adaptability, important tribute is made to reduce user's energy cost and China's energy-saving and emission-reduction cause
It offers.
Description of the drawings
Fig. 1 is the structure diagram of heat pump waste heat two-way three-level cascade utilization hot water apparatus；
Fig. 2 is the control system schematic diagram of heat pump waste heat two-way three-level cascade utilization hot water apparatus.
Specific embodiment
The present invention is described in detail below in conjunction with the accompanying drawings.
Embodiment 1：
Present embodiments provide for a kind of heat pump waste heat two-way three-level cascade utilization hot water apparatus, as shown in Figure 1, wastewater disposal basin 8, useless
Water pump 10, heat exchanger 1, the first evaporator 2, the second evaporator 3 and drainpipe 9 pass sequentially through pipeline F1, F2, F3 and F4 series connection
Connection, running water pipe 9, heat exchanger 1, the first condenser 6, the second condenser 7 and filtered water tank 13 pass sequentially through pipeline Q1, Q2,
Q3 and Q4 serial communications, the first compressor 4, the first condenser 6 and 2 head and the tail of the first evaporator pass sequentially through pipeline M1, M2 and M3
Series connection and cycle connection, on pipeline M2, the first gas-liquid separator 30 is mounted on pipeline M3 first throttling device 29, the
Two compressors 5, the second condenser 7 and 3 head and the tail of the second evaporator pass sequentially through pipeline N1, N2 and are connected with N3 series connection and cycle, the
Two throttling sets 31 are mounted on pipeline N2, and the second gas-liquid separator 32 is mounted on pipeline N3；Is equipped on pipeline F1
One temperature sensor 22 and the first valve 17, and wastewater disposal basin 8, the first temperature sensor 22, the first valve 17 and waste water pump 10 according to
Secondary setting；Second valve 14 on pipeline F2 is installed, second temperature sensor 23 and second flow are installed on pipeline F5
Meter 27, and the second evaporator 3, second temperature sensor 23, second flowmeter 27 and drainpipe 12 are set gradually；On pipeline Q2
6th valve 16 and third temperature sensor 24 are installed, and the 6th valve 16, third temperature sensor 24 and heat exchanger 1 are successively
Setting；4th temperature sensor 25,26 and the 5th valve 15 of first flowmeter be installed on pipeline Q5, and the second condenser 7,
4th temperature sensor 25, first flowmeter 26, the 5th valve 15 and filtered water tank 13 are set gradually.
Circulating flusher, circulating flusher are further included in above-mentioned heat pump waste heat two-way three-level cascade utilization hot water apparatus
In circulating line by waste water pump 10, the second evaporator 3, the first evaporator 2 and heat exchanger 1 be sequentially connected in series cycle connection, such as
Shown in Fig. 1, i.e., circulating line by section of tubing F1, pipeline F7, section of tubing F2, pipeline F3, pipeline F4, section of tubing F5 and
Pipeline F6 is sequentially connected in series, wherein, one end of pipeline F6 is connected with pipeline F2, and tie point is located at 10 and second valve of waste water pump
Between door 14, the other end is connected with pipeline F5, and tie point is between the second evaporator 3 and second temperature sensor 23；Pipe
One end of road F7 is connected with pipeline F1, and tie point, between the first valve 17 and waste water pump 10, the other end connects with pipeline F2
It is logical, and tie point is located between 10 and second valve 14 of waste water pump；4th valve 19 is installed on pipeline F6, on pipeline F7
Third valve 18 is installed, the filling opening 21 of flushing liquor is additionally provided on pipeline F7, and filling opening 21 is located at third valve 18
Between waste water pump 10, the 7th valve 20 is installed at filling opening 21.
The operation principle of above-mentioned heat pump waste heat two-way three-level cascade utilization hot water apparatus is as follows：
1st, spent hot water's thermal energy recycles：Third valve 18, the 4th valve 19 and the 7th valve 20 are closed, opens the first valve 17, the
Two valves 14, the 5th valve 15, the 6th valve 16 and waste water pump 10, spent hot water are extracted out by waste water pump 10 out of wastewater disposal basin 8, successively
Enter heat exchanger 1 through the second valve 14 on the first temperature sensor 22 on pipeline F1 and the first valve 17 and pipeline F2,
Waste water after the recycling of level-one thermal energy, enters the first evaporator 2 by pipeline F3, is passed through in the first evaporator 2 in heat exchanger 1
After crossing the recycling of two level thermal energy, by pipeline F4, into the second evaporator 3, recycled in the second evaporator 3 by three-stage heat energy
Afterwards, successively through on pipeline F5 second temperature sensor 23, be discharged into drainpipe 12 after 27 and the 5th valve 15 of second flowmeter.
2nd, clear water heats：Clear water（That is tap water）By running water pipe 9 successively through the 6th valve on pipeline Q1 and pipeline Q2
Door 16（Solenoid valve）Enter heat exchanger 1 with third temperature sensor 24, after clear water is heated in heat exchanger 1 by level-one, pass through pipe
Road Q3 enters the first condenser 6, in the first condenser 6 after two level heats, enters the second condenser 7 through pipeline Q4,
In second condenser 7 after three-level heats, successively through the 4th temperature sensor 25 on pipeline Q5 and first flowmeter 26 into
Enter filtered water tank 13.
3rd, refrigerant circulation one：After refrigerant is by the first gas-liquid separator 30, gaseous refrigerant enters the first compression
In machine 4, refrigerant is in the first compressor 4 after overcompression, and into the first condenser 6, refrigerant passes through in the first condenser 6
It crosses after condensation heat release becomes liquid, into first throttling device 29, in first throttling device 29 after refrigerant decrease temperature and pressure, into
Enter the first evaporator 2, refrigerant is after evaporation endothermic becomes gaseous state in the first evaporator 2, into the first gas-liquid separator
30, so on circulate.
3rd, refrigerant circulation two：After refrigerant is by the second gas-liquid separator 32, gaseous refrigerant enters the second compression
Machine 5, refrigerant is in the second compressor 5 after overcompression, and into the second condenser 7, refrigerant passes through in the second condenser 7
After condensation heat release becomes liquid, into second throttling device 31, in second throttling device 31 after refrigerant decrease temperature and pressure, enter
Second evaporator 3, refrigerant is after evaporation endothermic becomes gaseous state in the second evaporator 3, into the second gas-liquid separator 32,
So on circulate.
4th, circulation flushing：The first valve 17, the second valve 14 and the 5th valve 15 are closed before cleaning, opens third valve
18th, the 4th valve 19 and the 7th valve 20 add in appropriate cleaning solution by filling opening 21, are then shut off the 7th valve 20；Start
After cleaning, start waste water pump 10, flushing liquor enters from the water inlet of waste water pump 10, after pressurizeing by waste water pump 10, through pipeline F6
On the 4th valve 19 enter the second evaporator 3, then enter the first evaporator 2 through pipeline F4, then discharge from the first evaporator 2
Enter heat exchanger 1 by pipeline F3, then after the discharge of heat exchanger 1 successively after the third valve 18 on pipeline F2, pipeline F7
10 water inlet of waste water pump is discharged into, so on circulate, realizes circulation flushing function.
Embodiment 2：
Present embodiments provide for a kind of heat pump waste heat two-way three-level cascade utilization hot water apparatus and its control method, such as Fig. 1 institutes
Show, by-pass line F7, PLC control are further included in the heat pump waste heat two-way three-level cascade utilization hot water apparatus in present embodiment
Device, first flow regulating valve 11 and second flow regulating valve 33, one end of by-pass line F7 are connected with pipeline F3, the other end and pipe
Road F4 is connected, and the 8th valve 28 is also installed on by-pass line F7, and the 8th valve 28 is solenoid valve；First flow regulating valve
11 are mounted on pipeline Q4 and between first flowmeter 26 and filtered water tank 13, and second flow regulating valve 33 is mounted on pipeline F4
Go up and be located between the 5th valve 15 and second flowmeter 27, such as Fig. 2, PLC controller respectively with above-mentioned first flow regulating valve
11st, second flow regulating valve 33, first flowmeter 26, second flowmeter 27, the first temperature sensor 22, second temperature sensor
23rd, 28 equal signal connection of third temperature sensor 24, the 4th temperature sensor 25 and the 8th valve.In addition to this, this implementation
Mode is identical with embodiment 1, is not repeated herein.
The control method of above-mentioned heat pump waste heat two-way three-level cascade utilization hot water apparatus is as follows：
Store hot water demand's temperature T0 and hot water demand flow Q0 input by user, PLC controller in advance in PLC controller
The temperature T1 of above-mentioned first temperature sensor 22 of automatic collection, temperature T2, the third temperature sensor of second temperature sensor 23
24 temperature T3, the temperature T4 of the 4th temperature sensor 25, the flow Q1 of first flowmeter 26 and second flowmeter 27 stream
Q2 is measured, and according to the aperture of above-mentioned 8 parameter regulation first flows regulating valve 11 and second flow regulating valve 33, the 8th valve of control
The break-make of door 28, carries out control as follows respectively：
A, when Q1 is not equal to Q2, PLC controller adjusts the aperture of first flow regulating valve 11 so that Q1 is equal to Q2, i.e. clear water
Flow：Wastewater flow is equal to 1：1；
B, when T2 is less than or equal to 4 DEG C, PLC controller tunes up the aperture of second flow regulating valve 33, if second flow tune
The aperture of valve 33 is saved up to 100%, then opens the 8th valve 28 so that T2 is greater than or equal to 4 DEG C；
C, when T4 is more than T0, then synchronization tunes up first flow regulating valve 11 and second in proportion in proportion for PLC controller synchronization
The aperture of flow control valve 33 so that T4 is less than or equal to T0；But when first flow regulating valve 11 or second flow regulating valve 33
Aperture up to when 100% stop adjust；
D, open state is in less than T0 and the 8th valve 28 when T2 is more than 4 DEG C and T4, then closes the 8th valve 28；
E, off status is in less than T0 and the 8th valve 28 when T2 is more than 4 DEG C and T4, PLC controller synchronization turns first down in proportion
The aperture of flow control valve 11 and second flow regulating valve 33 so that T4 rises until equal to T0；But when Q1 or Q2 is less than or waits
Then stop adjusting when Q0 so that：T4 ensures that clear water flow, wastewater flow are greater than or equal to Q0 while as possible close to T0.
By above-mentioned hot water apparatus and control method, the applicant is provided such as several groups of test datas in following table：
| Testing time | Waste water temperature ℃ | Clear water temperature ℃ | Wastewater flow t/h | Clear water flow t/h | Discharge of wastewater temperature Degree DEG C | Hot water temperature ℃ | Input power kw | It heats defeated Go out kw | Efficiency Than |
| 03 month 2018 01 day | 36.3 | 8.1 | 2.78 | 2.79 | 4.5 | 43.2 | 17.66 | 113.9 | 6.5 |
| 03 month 2018 05 day | 35.9 | 9 | 2.81 | 2.79 | 4.9 | 43.8 | 18.18 | 112.7 | 6.2 |
| 03 month 2018 07 day | 36.1 | 10.1 | 2.78 | 2.8 | 5.4 | 44.2 | 18.78 | 111.1 | 5.9 |
| 03 month 2018 13 days | 32.8 | 11.9 | 2.79 | 2.76 | 4.8 | 43.8 | 18.29 | 102.3 | 5.6 |
| 03 month 2018 14 days | 33.3 | 12.3 | 2.78 | 2.78 | 5.1 | 44.1 | 18.62 | 102.8 | 5.5 |
| 03 month 2018 15 days | 33.3 | 14.6 | 2.78 | 2.79 | 6.6 | 45.0 | 19.47 | 98.5 | 5.1 |
Above-mentioned measurement condition is the actual conditions for simulating heat energy of bathing waste water recycling, i.e., the temperature of bathing spent hot water is higher in winter
（36 DEG C or so）, and tap water temperature is the bottom of compared at this time（8 DEG C or so）, it is relatively low in the temperature in spring, autumn and summer spent hot water（33
DEG C or so）, and tap water temperature is higher at this time（10 ~ 15 DEG C or so）.
As it can be seen that by the control method of heat pump waste heat two-way three-level cascade utilization hot water apparatus in present embodiment, clear
Water flow, wastewater flow are in 2.8T/h（Closely）In the case of, it can realize the minimum 4 DEG C of discharged at lower temperature of waste water, i.e., not only
In spent hot water spend energy cost heating heat by all recycle, and in tap water a part of heat of itself also by
" excess " recycles, it is even more important that on the basis of aforementioned " excess " recycling, realizes clear water flow and wastewater flow 1：
1, compared to common water resource heat pump or there is the water resource heat pump of preposition heat exchanger, this system can realize the dynamic of amount of hot water and yield
Balance, as long as there is startup hot water, it is ensured that the cycle of follow-up hot water is uninterruptedly supplied, and the hot water temperature of circulation-supplied is always
With start hot water temperature be consistent, product Energy Efficiency Ratio and heating capacity are obviously improved, significant increase product cost and
Adaptability.
The technical concepts and features of the above embodiment only to illustrate the invention, its object is to allow be familiar with technique
People can understand present disclosure and implement according to this, and it is not intended to limit the scope of the present invention.It is all according to the present invention
The equivalent transformation or modification that Spirit Essence is done, should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of heat pump waste heat two-way three-level cascade utilization hot water apparatus, which is characterized in that including heat exchanger（1）, first evaporation
Device（2）, the second evaporator（3）, the first compressor（4）, the second compressor（5）, the first condenser（6）, the second condenser（7）、
Wastewater disposal basin（8）, running water pipe（9）, waste water pump（10）, drainpipe（12）And filtered water tank（13）, the wastewater disposal basin（8）, described change
Hot device（1）, first evaporator（2）With second evaporator（3）Pass sequentially through pipeline F1, pipeline F2, pipeline F3 and pipe
Road F4 serial communications, composition spent hot water's thermal energy three-level gradient utilize recovery system；The running water pipe（9）, the heat exchanger
（1）, first condenser（6）With second condenser（7）Pass sequentially through pipeline Q1, pipeline Q2, pipeline Q3 and pipeline Q4
Serial communication forms clear water three-level gradient-heated system；The waste water pump（10）It is arranged on the pipeline F1；First pressure
Contracting machine（4）, first condenser（6）And first evaporator（2）Pass sequentially through pipeline M1, pipeline M2 and pipeline M3 strings
Connection and cycle connection；Second compressor（5）, second condenser（7）And second evaporator（3）It passes sequentially through
Pipeline N1, pipeline N2 connect and are recycled with pipeline N3 and connected；Second evaporator（3）Also pass through the pipeline F4 and the row
Water pipe（12）Connection, second condenser（7）Also pass through the pipeline Q4 and the filtered water tank（13）Connection.
2. heat pump waste heat two-way three-level cascade utilization hot water apparatus according to claim 1, which is characterized in that further include
Two valves（14）, the 5th valve（15）With the 6th valve（16）, second valve（14）On the pipeline F1 and position
In the waste water pump（10）With the heat exchanger（1）Between, the 5th valve（15）On the pipeline F4 and it is located at
The drainpipe（12）With second evaporator（3）Between；6th valve（16）On the pipeline Q1 and position
In the running water pipe（9）With the heat exchanger（1）Between.
3. heat pump waste heat two-way three-level cascade utilization hot water apparatus according to claim 2, which is characterized in that further include and follow
Ring flusher, the circulating flusher include circulating line, the first valve（17）, third valve（18）, the 4th valve
（19）With the 7th valve（20）, the circulating line is as described in the part pipeline F1, pipeline F6, pipeline F3, pipeline F2, part
Pipeline F1 and pipeline F5 head and the tail are sequentially connected in series cycle connection composition, and the circulating line is by the waste water pump（10）, it is described
Second evaporator（3）, first evaporator（2）And the heat exchanger（1）Cycle connection is sequentially connected in series, wherein, the pipe
The both ends of road F5 are connected with the pipeline F1, and wherein the tie point of one end is located at first valve（17）With the waste water
Pump（10）Between, the tie point of the other end is located at second valve（14）With the heat exchanger（1）Between；The pipeline F6's
One end is connected with the pipeline F1 and tie point is located at the waste water pump（10）With second valve（14）Between, the other end with
The pipeline F4 is connected and tie point is located at second evaporator（3）With the 5th valve（15）Between；
First valve（17）On the pipeline F1 and positioned at the waste water pump（10）With the wastewater disposal basin（8）It
Between；The third valve（18）On the pipeline F5 and positioned at the heat exchanger（1）With the waste water pump（10）Between,
And the third valve（18）It is also located at second valve（14）With the heat exchanger（1）Between；4th valve（19）
On the pipeline F6；7th valve（20）Mounted on the filling opening of the circulating line（21）Place, the liquid feeding
Mouthful（21）On the pipeline F5 and positioned at the third valve（18）With the waste water pump（10）Between.
4. heat pump waste heat two-way three-level cascade utilization hot water apparatus according to claim 3, which is characterized in that further include
One temperature sensor（22）, second temperature sensor（23）, third temperature sensor（24）With the 4th temperature sensor（25）, institute
State the first temperature sensor（22）On the pipeline F1 and positioned at the wastewater disposal basin（8）With first valve（17）It
Between, the second temperature sensor（23）On the pipeline F4 and positioned at the 5th valve（15）It is steamed with described second
Send out device（3）Between, the third temperature sensor（24）On the pipeline Q1 and positioned at the 6th valve（16）With
The heat exchanger（1）Between, the 4th temperature sensor（25）On the pipeline Q4 and positioned at the filtered water tank
（13）With second condenser（7）Between.
5. heat pump waste heat two-way three-level cascade utilization hot water apparatus according to claim 4, which is characterized in that further include
Flow meters（26）And second flowmeter（27）, the first flowmeter（26）On the pipeline Q4 and positioned at described clear
Water tank（13）With the 4th temperature sensor（25）Between；The second flowmeter（27）On the pipeline F4 and position
In the drainpipe（12）With the second temperature sensor（23）Between.
6. heat pump waste heat two-way three-level cascade utilization hot water apparatus according to any one of claim 1 to 5, feature exist
In further including by-pass line F7, one end of the by-pass line F7 is connected with the pipeline F2, and the other end and the pipeline F3 connect
It is logical.
7. heat pump waste heat two-way three-level cascade utilization hot water apparatus according to claim 6, which is characterized in that on the side
It threads a pipe and is also equipped with the 8th valve on F7（28）.
8. the heat pump waste heat two-way three-level cascade utilization hot water apparatus according to claim 1 to 5 or any one of 7, special
Sign is, first throttling device is additionally provided on the pipeline M2（29）, the first gas-liquid separation is additionally provided on the pipeline M3
Device（30）；Second throttling device is additionally provided on the pipeline N2（31）, the second gas-liquid separation is additionally provided on the pipeline N3
Device（32）.
9. heat pump waste heat two-way three-level cascade utilization hot water apparatus according to claim 5, which is characterized in that further include
PLC controller, first flow regulating valve（11）With second flow regulating valve（33）, the PLC controller is respectively with described first
Flow control valve（11）, the second flow regulating valve（33）, the first flowmeter（26）, the second flowmeter（27）、
First temperature sensor（22）, the second temperature sensor（23）, the third temperature sensor（24）, the described 4th
Temperature sensor（25）And the 8th valve（28）Signal connects, the first flow regulating valve（11）Mounted on the pipe
On road Q4 and positioned at the first flowmeter（26）With the filtered water tank（13）Between, the second flow regulating valve（33）Installation
On the pipeline F4 and positioned at the 5th valve（15）With the second flowmeter（27）Between.
10. a kind of control method of heat pump waste heat two-way three-level cascade utilization hot water apparatus as described in claim 9, special
Sign is, hot water demand's temperature T0 and hot water demand's flow Q0, the PLC input by user are stored in the PLC controller
First temperature sensor described in controller automatic collection（22）Temperature T1, the second temperature sensor（23）Temperature T2,
The third temperature sensor（24）Temperature T3, the 4th temperature sensor（25）Temperature T4, the first flowmeter
（26）Flow Q1 and the second flowmeter（27）Flow Q2, and the first flow tune according to above-mentioned each parameter regulation
Save valve（11）, the second flow regulating valve（33）Aperture, control the 8th valve（28）Break-make, respectively carry out it is as follows
Control：
If a, Q1 is not equal to Q2, the first flow regulating valve is adjusted（11）So that Q1 is equal to Q2, i.e. clear water flow：It is useless
Water flow is equal to 1：1；
If b, T2 is less than 4 DEG C, the second flow regulating valve is tuned up（33）Aperture, if the second flow regulating valve
（33）Aperture up to 100%, then open the 8th valve（28）So that T2 is greater than or equal to 4 DEG C；
If c, T4 is more than T0, synchronization tunes up the first flow regulating valve in proportion（11）With the second flow regulating valve
（33）Aperture so that T4 be less than or equal to T0；But when the first flow regulating valve（11）Or the second flow regulating valve
（33）Aperture up to when 100% stop adjust；
D, if T2 is more than 4 DEG C and T4 and is less than T0 and the 8th valve（28）In open state, then the 8th valve is closed
（28）；
E, if T2 is more than 4 DEG C and T4 and is less than T0 and the 8th valve（28）In off status, then institute is turned in synchronization down in proportion
State first flow regulating valve（11）With the second flow regulating valve（33）Aperture so that T4 rises until equal to T0；But work as
Q1 or Q2 then stops adjusting when being less than or equal to Q0 so that：T4 ensures clear water flow, waste water stream while as possible close to T0
Amount is greater than or equal to Q0.
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| CN201810254247.4A CN108253626A (en) | 2018-03-26 | 2018-03-26 | Heat pump waste heat two-way three-level cascade utilization hot water apparatus and its control method |
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| CN201810254247.4A CN108253626A (en) | 2018-03-26 | 2018-03-26 | Heat pump waste heat two-way three-level cascade utilization hot water apparatus and its control method |
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