CN110345675A - - 35 DEG C of low temperature air screw source heat pump intelligent comprehensive defrosters and its implementation - Google Patents
- 35 DEG C of low temperature air screw source heat pump intelligent comprehensive defrosters and its implementation Download PDFInfo
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- CN110345675A CN110345675A CN201910676716.6A CN201910676716A CN110345675A CN 110345675 A CN110345675 A CN 110345675A CN 201910676716 A CN201910676716 A CN 201910676716A CN 110345675 A CN110345675 A CN 110345675A
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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
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
-
- 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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
- H02P5/74—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more ac dynamo-electric motors
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Defrosting Systems (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses -35 DEG C of low temperature air screw source heat pump intelligent comprehensive defrosters, the defroster includes CPU, the model SR60 of CPU, CPU is connected with control contactor, coil, temperature sensor, humidity sensor, pressure switch and electrothermal relay, contactor is for controlling compressor, defrost electric heating, condensation fan and water pond heating, coil is for controlling solenoid valve, four-way valve, temperature sensor is for measuring air source heat pump water outlet, return water, exhaust, the temperature of fin and environment, humidity sensor is for measuring ambient humidity, pressure switch is protected for compressor high-low pressure, electrothermal relay is for overload of compressor protection and condensation fan overload protection.It has the advantage that with more accurately detection device, in conjunction with the frosting rule of heat pump, accurately judge whether unit is in the state that must be defrosted by independently developed defrosting logic, when unit lacks frosting and the former right holding stable operation of unit of frost-free, it reduces erroneous judgement frosting state and frequently enters defrosting number, achieve the purpose that improve comprehensive energy efficiency.
Description
Technical field
The present invention is -35 DEG C of low temperature air screw source heat pump intelligent comprehensive defrosters and its implementation, belongs to heat pump
Field of heating.
Background technique
Increasingly sharpen as coal changes electricity demanding, China northeast and northwest region winter heating environment temperature at -30 DEG C or so,
The high energy efficiency ratio advantage of heat pump by the favor of users, get over by -35 DEG C of low temperature air screw source heat pump unit occupation rates of market
Come it is bigger, but due to when environment temperature is at 10 DEG C or so unit can only generate dew be not achieved freezing point will not frosting, environment
Moisture fluctuation is very big when between temperature ± 10 DEG C, and air humidity is substantially reduced the dry and cold state that presents at -10 DEG C or less, several in the market
The defrosting detection method of -35 DEG C of low temperature air screw source heat pump units of money still with detect environment temperature and fin temperature difference and
Time interval needs the condition (unit lacks frosting and frost-free is not need to defrost) that defrosts to determine whether reaching, and causes to judge by accident
Disconnected frosting state and defrosting is frequently entered, so that comprehensive energy efficiency is not obviously high.
Summary of the invention
The technical problem to be solved by the present invention is to against the above deficiency, provide -35 DEG C of low temperature air screw source heat pump intelligence
Comprehensive defroster and its implementation pass through self-developing in conjunction with the frosting rule of heat pump with more accurately detection device
Defrosting logic come accurately judge whether unit is in the state that must be defrosted, when unit lacks frosting and the former right guarantor of frost-free
Stable operation of unit is held, erroneous judgement frosting state is reduced and frequently enters defrosting number, achievees the purpose that improve comprehensive energy efficiency.
In order to solve the above technical problems, the invention adopts the following technical scheme:
- 35 DEG C of low temperature air screw source heat pump intelligent comprehensive defrosters, the defroster include CPU, the model of CPU
SR60, CPU are connected with control contactor, coil, temperature sensor, humidity sensor, pressure switch and electrothermal relay, contactor
For controlling compressor, defrosting electric heating, condensation fan and water pond heating, coil is for controlling solenoid valve, four-way valve, temperature sensing
Device be used for measure air source heat pump water outlet, return water, exhaust, fin and environment temperature, humidity sensor be used for measure environmental wet
Degree, pressure switch are protected for compressor high-low pressure, and electrothermal relay is for overload of compressor protection and condensation fan overload protection.
It further, further include power supply triple line, power supply triple line is connected with the one end circuit breaker Q F1, the one end circuit breaker Q F2
With the one end circuit breaker Q F3, the circuit breaker Q F1 other end is connected with that contactor KM3 switchs one end and contactor KM1 switchs one end, connects
The tentaculum KM1 switch other end is connected with the one end electrothermal relay FR1, and the electrothermal relay FR1 other end is connected with the one end compressor M1, connects
The tentaculum KM3 switch other end and the compressor M1 other end are connected with contactor KM2 switch；The circuit breaker Q F2 other end, which is connected with, to be connect
Tentaculum KM4 switchs one end, and contactor KM4 switchs other end connection defrosting electric heater；The circuit breaker Q F3 other end is connected with contact
Device KM5 switchs one end, and the contactor KM5 switch other end is connected with the one end electrothermal relay FR2, the connection of the electrothermal relay FR2 other end
There is condensation fan M2.
Further, the DQa.0 foot of the CPU is connected with one end of coil KM12, another terminal connecting zero line of coil KM12
N, coil KM12 are for controlling feather valve；The DQa.1 foot of CPU is connected with one end of coil KM11, another termination of coil KM11
Zero curve N, coil KM11 are for controlling 10% solenoid valve；The DQa.2 foot of CPU is connected with one end of coil KM10, and coil KM10's is another
One terminal connecting zero line N, coil KM10 are for controlling 50% solenoid valve；The DQa.3 foot of CPU is connected with one end of coil KM9, coil KM9
Another terminal connecting zero line N, coil KM9 for control 75% solenoid valve；The DQa.4 foot of CPU is connected with one end of coil KM8, coil
Another terminal connecting zero line N of KM8, coil KM8 are for controlling 100% solenoid valve；The DQa.5 foot of CPU is connected with the line of contactor KM1
Enclose one end, the main contactor of the coil of contactor KM1 another terminal connecting zero line N, contactor KM1 as control compressor；CPU's
DQa.6 foot is connected with coil one end of contactor KM2, and the coil of contactor KM2 another terminal connecting zero line N, contactor KM2 are as control
The star contactor of compressor processed；The DQa.7 foot of CPU is connected with coil one end of contactor KM3, and the coil of contactor KM3 is another
The corner connection tentaculum of terminal connecting zero line N, contactor KM3 as control compressor；The DQb.6 foot of CPU is connected with one end of coil KM7,
Another terminal connecting zero line N of coil KM7, coil KM7 are for controlling four-way valve；The DQb.7 foot of CPU is connected with the line of contactor KM4
One end is enclosed, the coil of contactor KM4 another terminal connecting zero line N, contactor KM4 are for controlling defrosting electric heating；The DQc.1 foot of CPU connects
It is connected to coil one end of contactor KM5, the coil of contactor KM5 another terminal connecting zero line N, contactor KM5 are for controlling condensating wind
Machine；The DQc.2 foot of CPU is connected with coil one end of contactor KM6, another terminal connecting zero line N of the coil of contactor KM6, contactor
KM6 is for controlling water pond heating.
Further, the T1 foot of the CPU is connected with the one end temperature sensor T1, the connection of the temperature sensor T1 other end
The COM foot of CPU, temperature sensor T1 is for measuring leaving water temperature；The T2 foot of CPU is connected with the one end temperature sensor T2, temperature
The sensor T2 other end connects the COM foot of CPU, and temperature sensor T2 is for measuring return water temperature；The T3 foot of CPU is connected with temperature
The one end sensor T3, the temperature sensor T3 other end connect the COM foot of CPU, and temperature sensor T3 is for measuring delivery temperature；
The T4 foot of CPU is connected with the one end temperature sensor T4, and the temperature sensor T4 other end connects the COM foot of CPU, temperature sensor T4
For measuring fin temperature；The T8 foot of CPU is connected with the one end temperature sensor T5, and the temperature sensor T5 other end connects CPU's
COM foot, temperature sensor T5 is for measuring environment temperature；The I1 foot and I2 foot of CPU is connected separately with pressure gauge one end, pressure gauge
Another termination 24V, two pressure gauges are respectively used to measurement pressure of inspiration(Pi) and pressure at expulsion；The I3 foot of CPU is connected with humidity sensor
The one end device T6, humidity sensor T6 another termination 24V, humidity sensor T6 are for measuring ambient humidity.
Further, the DIa.4 foot of the CPU is connected with the one end low pressure switch FR3, and low pressure switch FR3 is another
One termination 24V, low pressure switch FR3 is used for compressor low-voltage variation；The DIa.5 foot of CPU is connected with high-pressure switch FR4
One end, high-pressure switch FR4 another termination 24V, high-pressure switch FR4 are used for compressor high voltage protective；The DIa.6 of CPU
Foot is connected with the one end electrothermal relay FR1, and electrothermal relay FR1 another termination 24V, electrothermal relay FR1 are protected for overload of compressor；
The DIb.2 foot of CPU is connected with the one end electrothermal relay FR2, and electrothermal relay FR2 another termination 24V, electrothermal relay FR2 are for condensing
Blower overload protection；The DIb.5 foot of CPU is connected with the one end switch K, and switch K another termination 24V, switch K are examined for water flow switch
It surveys.
The implementation method of -35 DEG C of low temperature air screw source heat pump intelligent comprehensive defrosters, including enter defrosting and exit
Defrosting；
There are three types of the modes for entering defrosting, is examined in such a way that fin temperature detection enters defrosting, through low pressure respectively
It surveys the mode for entering defrosting and is detected going out backwater temperature difference by way of defrosting, as long as three kinds of modes for entering defrosting have one
Kind meets defrosting condition and can be carried out defrosting, and four-way valve commutation defrosting embodiment all can be used in three kinds of modes for entering defrosting
With electric heated defrosting embodiment；
The condition that exits defrosting and need to meet are as follows:
1, Defrost operation time > defrosting maximum duration；
2, fin temperature > defrosting terminates fin temperature；
3, high voltage protective disconnects, delivery temperature is protected；
4, leaving water temperature≤allow defrosts leaving water temperature.
Further, the public conditions that the need for entering defrosting meet are as follows:
1, environment temperature≤allow defrosts environment temperature；
2, leaving water temperature > allows the leaving water temperature that defrosts；
3, compressor operating time > starts detection time；
4, the minimum runing time of compressor operating time > compressor.
Further, the condition that need to meet in such a way that fin temperature detection enters defrosting are as follows:
1, environment temperature > allows the low ambient temperature that defrosts；
2, fin temperature≤allow defrosts fin temperature；
3, dew-point temperature corresponding under fin temperature≤current environmental temperature humidity；
4, fin temperature when fin temperature≤start detection-frosting fin variation temperature difference；
As Defrost operation time > Defrost operation last time, 30S time, frosting fin changes -0.3 DEG C of the temperature difference, when Defrost operation
Between≤Defrost operation last time, 30S time when frosting fin change+0.3 DEG C of the temperature difference.
Further, the condition that need to be met by way of going out backwater temperature difference detection and entering defrosting are as follows:
1, water flow switch normal ON；
2, compressor continuous service 30 minutes；
3, backwater temperature difference half out when going out backwater temperature difference≤start detection.
Further, described to meet condition in such a way that low pressure detects and enters defrosting:
Unit reaches low-voltage variation and disconnects, and does not alarm at this time, unit enters defrosting.
The invention adopts the above technical scheme, compared with prior art, has the following technical effect that
- 35 DEG C of low temperature air screw source of the present invention heat pump intelligent comprehensive defroster and its implementation, utilization are more smart
Quasi- detection device accurately judges whether unit is located by independently developed defrosting logic in conjunction with the frosting rule of heat pump
In the state that must be defrosted, when unit lacks frosting and the former right holding stable operation of unit of frost-free, reduction erroneous judgement frosting shape
State and defrosting number is frequently entered, achievees the purpose that improve comprehensive energy efficiency.
The present invention is described in detail with reference to the accompanying drawings and examples.
Detailed description of the invention
Fig. 1 is the major loop figure of defroster in the embodiment of the present invention；
Fig. 2 is the CPU module wiring diagram of baffle in the embodiment of the present invention；
Fig. 3 is the flow chart of defroster implementation method in the embodiment of the present invention.
Specific embodiment
Embodiment 1, as depicted in figs. 1 and 2, -35 DEG C of low temperature air screw source heat pump intelligent comprehensive defrosters, including electricity
Source triple line, power supply triple line are connected with the one end circuit breaker Q F1, the one end circuit breaker Q F2 and the one end circuit breaker Q F3, circuit breaker Q F1
The other end is connected with that contactor KM3 switchs one end and contactor KM1 switchs one end, and the contactor KM1 switch other end is connected with heat
The one end relay FR1, the electrothermal relay FR1 other end are connected with the one end compressor M1, and contactor KM3 switchs the other end and compressor
The M1 other end is connected with contactor KM2 switch；The circuit breaker Q F2 other end is connected with contactor KM4 and switchs one end, contactor KM4
Switch other end connection defrosting electric heater；The circuit breaker Q F3 other end is connected with contactor KM5 and switchs one end, and contactor KM5 is opened
It closes the other end and is connected with the one end electrothermal relay FR2, the electrothermal relay FR2 other end is connected with condensation fan M2.
The defroster further includes CPU, and the DQa.0 foot of the model SR60, the CPU of CPU are connected with coil KM12
One end, another terminal connecting zero line N of coil KM12, coil KM12 are for controlling feather valve；The DQa.1 foot of CPU is connected with coil
One end of KM11, another terminal connecting zero line N of coil KM11, coil KM11 are for controlling 10% solenoid valve；The DQa.2 foot of CPU connects
There is one end of coil KM10, another terminal connecting zero line N of coil KM10, coil KM10 are for controlling 50% solenoid valve；The DQa.3 of CPU
Foot is connected with one end of coil KM9, and another terminal connecting zero line N of coil KM9, coil KM9 are for controlling 75% solenoid valve；CPU's
DQa.4 foot is connected with one end of coil KM8, and another terminal connecting zero line N of coil KM8, coil KM8 are for controlling 100% solenoid valve；
The DQa.5 foot of CPU is connected with coil one end of contactor KM1, the coil of contactor KM1 another terminal connecting zero line N, contactor KM1
Main contactor as control compressor；The DQa.6 foot of CPU is connected with coil one end of contactor KM2, the line of contactor KM2
Enclose another terminal connecting zero line N, star contactor of the contactor KM2 as control compressor；The DQa.7 foot of CPU is connected with contactor KM3
Coil one end, the coil of contactor KM3 another terminal connecting zero line N, contactor KM3 as control compressor corner connection tentaculum；CPU
DQb.6 foot be connected with one end of coil KM7, another terminal connecting zero line N of coil KM7, coil KM7 are for controlling four-way valve；CPU
DQb.7 foot be connected with coil one end of contactor KM4, the coil of contactor KM4 another terminal connecting zero line N, contactor KM4 are used for
Control defrosting electric heating；The DQc.1 foot of CPU is connected with coil one end of contactor KM5, another termination zero of the coil of contactor KM5
Line N, contactor KM5 are for controlling condensation fan；The DQc.2 foot of CPU is connected with coil one end of contactor KM6, contactor KM6
Coil another terminal connecting zero line N, contactor KM6 is for controlling water pond heating.
The T1 foot of the CPU is connected with the one end temperature sensor T1, and the temperature sensor T1 other end connects the COM foot of CPU,
Temperature sensor T1 is for measuring leaving water temperature；The T2 foot of CPU is connected with the one end temperature sensor T2, and temperature sensor T2 is another
The COM foot of end connection CPU, temperature sensor T2 is for measuring return water temperature；The T3 foot of CPU is connected with temperature sensor T3 mono-
End, the temperature sensor T3 other end connect the COM foot of CPU, and temperature sensor T3 is for measuring delivery temperature；The T4 foot of CPU connects
It is connected to the one end temperature sensor T4, the temperature sensor T4 other end connects the COM foot of CPU, and temperature sensor T4 is for measuring wing
Piece temperature；The T8 foot of CPU is connected with the one end temperature sensor T5, and the temperature sensor T5 other end connects the COM foot of CPU, temperature
Sensor T5 is for measuring environment temperature；The I1 foot and I2 foot of CPU is connected separately with pressure gauge one end, another termination of pressure gauge
24V, two pressure gauges are respectively used to measurement pressure of inspiration(Pi) and pressure at expulsion；The I3 foot of CPU is connected with the one end humidity sensor T6,
Humidity sensor T6 another termination 24V, humidity sensor T6 are for measuring ambient humidity.
The DIa.4 foot of the CPU is connected with the one end low pressure switch FR3, another termination 24V of low pressure switch FR3,
Low pressure switch FR3 is used for compressor low-voltage variation；The DIa.5 foot of CPU is connected with the one end high-pressure switch FR4, high pressure
Pressure switch FR4 another termination 24V, high-pressure switch FR4 are used for compressor high voltage protective；The DIa.6 foot of CPU is connected with heat
The one end relay FR1, electrothermal relay FR1 another termination 24V, electrothermal relay FR1 are protected for overload of compressor；The DIb.2 of CPU
Foot is connected with the one end electrothermal relay FR2, and electrothermal relay FR2 another termination 24V, electrothermal relay FR2 are protected for condensation fan overload
Shield；The DIb.5 foot of CPU is connected with the one end switch K, and switch K another termination 24V, switch K are detected for water flow switch.
The CPU is connected with control contactor, coil, temperature sensor, humidity sensor, pressure switch and hot relay
Device, contactor is for controlling compressor, defrosting electric heating, condensation fan and water pond heating, and coil is for controlling solenoid valve, four-way
Valve, temperature sensor be used to measure air source heat pump water outlet, return water, exhaust, fin and environment temperature, humidity sensor is used for
Ambient humidity is measured, pressure switch is protected for compressor high-low pressure, and electrothermal relay is protected for overload of compressor and condensating wind
Machine overload protection, CPU control contactor, temperature sensor and electrothermal relay work, to realize to compressor, solenoid valve, four
The job control that port valve, defrosting electric heating, condensation fan and water pond heat, CPU control temperature sensor is for measuring air-source heat
The temperature of water, return water, exhaust, fin and environment is pumped out, while carrying out data processing after temperature is returned back CPU.
As shown in figure 3, the implementation method of -35 DEG C of low temperature air screw source heat pump intelligent comprehensive defrosters includes entering to remove
Frost and exit defrosting.
It is described to include four-way valve commutation defrosting embodiment and electric heated defrosting embodiment into defrosting.
It is described enter defrosting the following steps are included:
Step S101, unit operate normally, and enter step S102 after the completion；
Step S102 detects environment temperature T0Whether≤allow the environment temperature T that defrosts01If environment temperature > allows the environment that defrosts
When temperature, fin can condense but not frosting, and return continues to execute step S102, eligible, enters step S103；
Step S103 detects leaving water temperature T2Whether > allows the leaving water temperature T that defrosts3If leaving water temperature≤allowing to defrost is discharged
When temperature, system, which carries out defrosting, will lead to water-side heat icing, and return continues to execute step S103, eligible then to enter step
Rapid S104；
Step S104 detects compressor operating time h1Whether≤start detection time h2If compressor operating time > starts
Detection time, compressor operation start detection afterwards for a period of time and guarantee that detection data is stablized, and return continues to execute step S104, accords with
Conjunction condition then enters step S105；
Step S105 detects compressor operating time h1Whether the minimum runing time h of > compressor3, it is ineligible, it returns
Step S105 is continued to execute, high frequent start and stop are prevented, it is eligible, enter step S106, step S108 and step
S113；
Step S106, water flow switch normal ON detect compressor continuous working period h1Whether > 30 minutes, if eligible
Then enter step S107；
Step S107 detects backwater temperature difference T△Whether≤start backwater temperature difference T out when detection△1Half, it is eligible, enter
Step S112, unit defrost；
Step S108 detects environment temperature T0Whether > allows the low ambient temperature T that defrosts02If eligible, enter step
Otherwise S109 returns to step S108；
Step S109 detects fin temperature T4Whether≤allow the fin temperature T that defrosts5If eligible, enter step
Otherwise S110 returns to step S109；
Step S110 detects fin temperature T4Whether≤current environmental temperature humidity under corresponding dew-point temperature T6If symbol
Conjunction condition then enters step S111, otherwise returns to step S110；
Step S111 detects fin temperature T4Whether≤start detection when fin temperature T41Frosting fin changes temperature difference T4△,
As Defrost operation time > Defrost operation last time, 30S time frosting fin change -0.3 DEG C of the temperature difference, when the Defrost operation time≤
Frosting fin changes+0.3 DEG C of the temperature difference when Defrost operation last time, 30S time, if eligible, enters step S112, unit into
Row defrosting, otherwise returns to step S111；
Step S113 detects whether to reach low-voltage variation, if then entering step S112, disconnects unit and defrosts, otherwise return
It returns and continues to execute step S113.
According to foregoing description it can be concluded that, into defrosting mode there are three types of, be to be entered by fin temperature detection respectively
The mode of defrosting detects in such a way that low pressure detects and enters defrosting and going out backwater temperature difference by way of defrosting, three kinds
As long as the mode into defrosting has a kind of defrosting condition that meets to can be carried out defrosting, three kinds of modes for entering defrosting all be can be used
Four-way valve commutation defrosting embodiment and electric heated defrosting embodiment.
The public conditions that the need for entering defrosting meet are as follows:
1, environment temperature≤allow defrosts environment temperature；
When environment temperature > allows to defrost environment temperature, fin can condense but not frosting；
2, leaving water temperature > allows the leaving water temperature that defrosts；
When leaving water temperature≤allow defrosts leaving water temperature, system, which carries out defrosting, will lead to water-side heat icing；
3, compressor operating time > starts detection time；
Compressor operation starts detection afterwards for a period of time and guarantees that detection data is stablized；
4, the minimum runing time of compressor operating time > compressor；
Prevent high frequent start and stop.
The condition that need to meet in such a way that fin temperature detection enters defrosting are as follows:
1, environment temperature > allows the low ambient temperature that defrosts；
2, fin temperature≤allow defrosts fin temperature；
3, dew-point temperature corresponding under fin temperature≤current environmental temperature humidity；
4, fin temperature when fin temperature≤start detection-frosting fin variation temperature difference；
As Defrost operation time > Defrost operation last time, 30S time, frosting fin changes -0.3 DEG C of the temperature difference, when Defrost operation
Between≤Defrost operation last time, 30S time when frosting fin change+0.3 DEG C of the temperature difference.
It is described to meet condition in such a way that low pressure detects and enters defrosting:
Low-voltage variation disconnects, and does not alarm at this time.
The condition that need to be met by way of going out backwater temperature difference detection and entering defrosting are as follows:
1, water flow switch normal ON；
2, compressor continuous service 30 minutes；
3, backwater temperature difference half out when going out backwater temperature difference≤start detection.
The condition that exits defrosting and need to meet are as follows:
1, Defrost operation time > defrosting maximum duration；
2, fin temperature > defrosting terminates fin temperature；
3, high voltage protective disconnects, delivery temperature protects (not alarming at this time)；
4, leaving water temperature≤allow defrosts leaving water temperature.
The intelligent comprehensive defroster and its implementation can be improved the comprehensive energy efficiency of unit operation, reduce because accidentally removing
Frost causes unit frequent start-stop to increase unit service life.
Description of the invention is given for the purpose of illustration and description, and is not exhaustively or will be of the invention
It is limited to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.It selects and retouches
Stating embodiment is principle and practical application in order to better illustrate the present invention, and enables those skilled in the art
Understand the present invention to design various embodiments suitable for specific applications with various modifications.
Claims (10)
1.-35 DEG C of low temperature air screw source heat pump intelligent comprehensive defroster, it is characterised in that: the defroster includes CPU,
The model SR60 of CPU, CPU be connected with control contactor, coil, temperature sensor, humidity sensor, pressure switch and heat after
Electric appliance, contactor is for controlling compressor, defrosting electric heating, condensation fan and water pond heating, and coil is for controlling solenoid valve, four-way
Valve, temperature sensor be used to measure air source heat pump water outlet, return water, exhaust, fin and environment temperature, humidity sensor is used for
Ambient humidity is measured, pressure switch is protected for compressor high-low pressure, and electrothermal relay is protected for overload of compressor and condensating wind
Machine overload protection.
2. -35 DEG C of low temperature air screw source heat pump intelligent comprehensive defrosters as described in claim 1, it is characterised in that: also
Including power supply triple line, power supply triple line is connected with the one end circuit breaker Q F1, the one end circuit breaker Q F2 and the one end circuit breaker Q F3, breaks
The road device QF1 other end is connected with that contactor KM3 switchs one end and contactor KM1 switchs one end, and contactor KM1 switchs the other end and connects
Be connected to the one end electrothermal relay FR1, the electrothermal relay FR1 other end is connected with the one end compressor M1, contactor KM3 switch the other end and
The compressor M1 other end is connected with contactor KM2 switch；The circuit breaker Q F2 other end is connected with contactor KM4 and switchs one end, contact
Device KM4 switchs other end connection defrosting electric heater；The circuit breaker Q F3 other end is connected with contactor KM5 and switchs one end, contactor
The KM5 switch other end is connected with the one end electrothermal relay FR2, and the electrothermal relay FR2 other end is connected with condensation fan M2.
3. -35 DEG C of low temperature air screw source heat pump intelligent comprehensive defrosters as described in claim 1, it is characterised in that: institute
The DQa.0 foot for stating CPU is connected with one end of coil KM12, and another terminal connecting zero line N of coil KM12, coil KM12 are unloaded for controlling
Carry valve；The DQa.1 foot of CPU is connected with one end of coil KM11, and another terminal connecting zero line N of coil KM11, coil KM11 are for controlling
Make 10% solenoid valve；The DQa.2 foot of CPU is connected with one end of coil KM10, another terminal connecting zero line N, coil KM10 of coil KM10
For controlling 50% solenoid valve；The DQa.3 foot of CPU is connected with one end of coil KM9, another terminal connecting zero line N of coil KM9, coil
KM9 is for controlling 75% solenoid valve；The DQa.4 foot of CPU is connected with one end of coil KM8, another terminal connecting zero line N of coil KM8,
Coil KM8 is for controlling 100% solenoid valve；The DQa.5 foot of CPU is connected with coil one end of contactor KM1, the line of contactor KM1
Enclose another terminal connecting zero line N, main contactor of the contactor KM1 as control compressor；The DQa.6 foot of CPU is connected with contactor KM2
Coil one end, the coil of contactor KM2 another terminal connecting zero line N, contactor KM2 as control compressor star contactor；CPU
DQa.7 foot be connected with coil one end of contactor KM3, another terminal connecting zero line N of the coil of contactor KM3, contactor KM3 conduct
Control the corner connection tentaculum of compressor；The DQb.6 foot of CPU is connected with one end of coil KM7, another terminal connecting zero line N of coil KM7,
Coil KM7 is for controlling four-way valve；The DQb.7 foot of CPU is connected with coil one end of contactor KM4, and the coil of contactor KM4 is another
One terminal connecting zero line N, contactor KM4 are for controlling defrosting electric heating；The DQc.1 foot of CPU is connected with coil one end of contactor KM5,
The coil of contactor KM5 another terminal connecting zero line N, contactor KM5 are for controlling condensation fan；The DQc.2 foot of CPU is connected with contact
Coil one end of device KM6, the coil of contactor KM6 another terminal connecting zero line N, contactor KM6 are for controlling water pond heating.
4. -35 DEG C of low temperature air screw source heat pump intelligent comprehensive defrosters as described in claim 1, it is characterised in that: institute
The T1 foot for stating CPU is connected with the one end temperature sensor T1, and the temperature sensor T1 other end connects the COM foot of CPU, temperature sensor
T1 is for measuring leaving water temperature；The T2 foot of CPU is connected with the one end temperature sensor T2, and the temperature sensor T2 other end connects CPU
COM foot, temperature sensor T2 is for measuring return water temperature；The T3 foot of CPU is connected with the one end temperature sensor T3, temperature sensing
The device T3 other end connects the COM foot of CPU, and temperature sensor T3 is for measuring delivery temperature；The T4 foot of CPU is connected with temperature sensing
The one end device T4, the temperature sensor T4 other end connect the COM foot of CPU, and temperature sensor T4 is for measuring fin temperature；CPU's
T8 foot is connected with the one end temperature sensor T5, and the temperature sensor T5 other end connects the COM foot of CPU, and temperature sensor T5 is used for
Measure environment temperature；The I1 foot and I2 foot of CPU is connected separately with pressure gauge one end, another termination 24V of pressure gauge, two pressure gauges
It is respectively used to measurement pressure of inspiration(Pi) and pressure at expulsion；The I3 foot of CPU is connected with the one end humidity sensor T6, and humidity sensor T6 is another
One termination 24V, humidity sensor T6 is for measuring ambient humidity.
5. -35 DEG C of low temperature air screw source heat pump intelligent comprehensive defrosters as described in claim 1, it is characterised in that: institute
The DIa.4 foot for stating CPU is connected with the one end low pressure switch FR3, another termination 24V of low pressure switch FR3, and low pressure is opened
It closes FR3 and is used for compressor low-voltage variation；The DIa.5 foot of CPU is connected with the one end high-pressure switch FR4, high-pressure switch FR4
Another termination 24V, high-pressure switch FR4 are used for compressor high voltage protective；The DIa.6 foot of CPU is connected with electrothermal relay FR1 mono-
End, electrothermal relay FR1 another termination 24V, electrothermal relay FR1 are protected for overload of compressor；The DIb.2 foot of CPU is connected with heat
The one end relay FR2, electrothermal relay FR2 another termination 24V, electrothermal relay FR2 are used for condensation fan overload protection；CPU's
DIb.5 foot is connected with the one end switch K, and switch K another termination 24V, switch K are detected for water flow switch.
The implementation method of 6.-35 DEG C of low temperature air screw source heat pump intelligent comprehensive defroster, it is characterised in that: removed including entering
Frost and exit defrosting；
There are three types of the modes for entering defrosting, is examined in such a way that fin temperature detection enters defrosting, through low pressure respectively
It surveys the mode for entering defrosting and is detected going out backwater temperature difference by way of defrosting, as long as three kinds of modes for entering defrosting have one
Kind meets defrosting condition and can be carried out defrosting, and four-way valve commutation defrosting embodiment all can be used in three kinds of modes for entering defrosting
With electric heated defrosting embodiment；
The condition that exits defrosting and need to meet are as follows:
1, Defrost operation time > defrosting maximum duration；
2, fin temperature > defrosting terminates fin temperature；
3, high voltage protective disconnects, delivery temperature is protected；
4, leaving water temperature≤allow defrosts leaving water temperature.
7. the implementation method of -35 DEG C of low temperature air screw source heat pump intelligent comprehensive defrosters as claimed in claim 6, special
Sign is: the public conditions that the need for entering defrosting meet are as follows:
1, environment temperature≤allow defrosts environment temperature；
2, leaving water temperature > allows the leaving water temperature that defrosts；
3, compressor operating time > starts detection time；
4, the minimum runing time of compressor operating time > compressor.
8. the implementation method of -35 DEG C of low temperature air screw source heat pump intelligent comprehensive defrosters as claimed in claim 6, special
Sign is: the condition that need to meet in such a way that fin temperature detection enters defrosting are as follows:
1, environment temperature > allows the low ambient temperature that defrosts；
2, fin temperature≤allow defrosts fin temperature；
3, dew-point temperature corresponding under fin temperature≤current environmental temperature humidity；
4, fin temperature when fin temperature≤start detection-frosting fin variation temperature difference；
As Defrost operation time > Defrost operation last time, 30S time, frosting fin changes -0.3 DEG C of the temperature difference, when Defrost operation
Between≤Defrost operation last time, 30S time when frosting fin change+0.3 DEG C of the temperature difference.
9. the implementation method of -35 DEG C of low temperature air screw source heat pump intelligent comprehensive defrosters as claimed in claim 6, special
Sign is: the condition that need to be met by way of going out backwater temperature difference detection and entering defrosting are as follows:
1, water flow switch normal ON；
2, compressor continuous service 30 minutes；
3, backwater temperature difference half out when going out backwater temperature difference≤start detection.
10. the implementation method of -35 DEG C of low temperature air screw source heat pump intelligent comprehensive defrosters as claimed in claim 6,
It is characterized in that: described to meet condition in such a way that low pressure detects and enters defrosting:
Unit reaches low-voltage variation and disconnects, and does not alarm at this time, unit enters defrosting.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910676716.6A CN110345675A (en) | 2019-07-25 | 2019-07-25 | - 35 DEG C of low temperature air screw source heat pump intelligent comprehensive defrosters and its implementation |
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| CN201910676716.6A CN110345675A (en) | 2019-07-25 | 2019-07-25 | - 35 DEG C of low temperature air screw source heat pump intelligent comprehensive defrosters and its implementation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111306854A (en) * | 2020-03-05 | 2020-06-19 | 浙江中广电器股份有限公司 | Defrosting control method, processor and air source heat pump system |
| CN113623889A (en) * | 2021-07-30 | 2021-11-09 | 青岛海尔空调电子有限公司 | Control method for air source heat pump unit |
-
2019
- 2019-07-25 CN CN201910676716.6A patent/CN110345675A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111306854A (en) * | 2020-03-05 | 2020-06-19 | 浙江中广电器股份有限公司 | Defrosting control method, processor and air source heat pump system |
| CN113623889A (en) * | 2021-07-30 | 2021-11-09 | 青岛海尔空调电子有限公司 | Control method for air source heat pump unit |
| WO2023005246A1 (en) * | 2021-07-30 | 2023-02-02 | 青岛海尔空调电子有限公司 | Control method for air source heat pump unit |
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