CN105466095B - Low-temperature refrigeration air conditioner unit electric heating controlling method, device and system - Google Patents
Low-temperature refrigeration air conditioner unit electric heating controlling method, device and system Download PDFInfo
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- CN105466095B CN105466095B CN201610052387.4A CN201610052387A CN105466095B CN 105466095 B CN105466095 B CN 105466095B CN 201610052387 A CN201610052387 A CN 201610052387A CN 105466095 B CN105466095 B CN 105466095B
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- air conditioner
- low
- refrigeration air
- temperature
- temperature refrigeration
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Classifications
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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
- 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
- F25B49/022—Compressor control arrangements
-
- 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
- F25B2500/00—Problems to be solved
- F25B2500/28—Means for preventing liquid refrigerant entering into the compressor
-
- 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
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The present invention discloses a kind of low-temperature refrigeration air conditioner unit electric heating controlling method, device and system.The described method includes：The current state of low-temperature refrigeration air conditioner unit is detected, the state includes shutdown status, holding state and operating status；If the current state of low-temperature refrigeration air conditioner unit is shutdown status, after receiving power-on instruction, if downtime reaches the first preset time, control electric heater unit controls compressor starts operation after opening the second preset time；If the current state of low-temperature refrigeration air conditioner unit is operating status, the suction superheat of low-temperature refrigeration air conditioner unit is calculated, if suction superheat is opened not less than the first preset temperature, control electric heater unit.Technical solution provided by the invention, can effectively prevent unit complete machine from being powered on (after power-off) when restarting and in unit running process the problem of compressor band liquid, so as to avoid producing the risk of compressor liquid hammer, can preferably protect compressor.
Description
Technical field
The present invention relates to control technology field, more particularly to a kind of low-temperature refrigeration air conditioner unit electric heating controlling method, dress
Put and system.
Background technology
At present, original forceful electric power is used applied to most of electrically heated control mode of low-temperature refrigeration air conditioner machine set compressor
Control, according to the switch of compressor A.C. contactor, is turned on or off electrical heating.I.e. compressor is opened, and electrical heating is closed；Pressure
Contracting organ closes, and electrical heating is opened.
Although this method control of the prior art is simple, refrigerant migration can be solved under long-time holding state (i.e.
Compressor is with liquid) situation, but can not effectively prevent unit complete machine power off after start when and unit running process in compressor band
The problem of liquid, easily produce the risk of compressor liquid hammer, so as to damage compressor.
The content of the invention
In view of this, the present invention provides a kind of low-temperature refrigeration air conditioner unit electric heating controlling method, device and system, energy
It is enough effectively to prevent unit complete machine from being powered on (after power-off) when restarting and in unit running process the problem of compressor band liquid, so as to avoid
The risk of compressor liquid hammer is produced, can preferably protect compressor.
To achieve the above object, the present invention provides following technical solution：
A kind of low-temperature refrigeration air conditioner unit electric heating controlling method, the low-temperature refrigeration air conditioner unit include compressor and set
The electric heater unit on the compressor is put, including：
The current state of the low-temperature refrigeration air conditioner unit is detected, the state includes shutdown status, holding state and fortune
Row state；
If the current state of the low-temperature refrigeration air conditioner unit is the shutdown status, after receiving power-on instruction, if stopping
The machine time reaches the first preset time, controls the electric heater unit to control the compressor starts after opening the second preset time
Operation；
If the current state of the low-temperature refrigeration air conditioner unit is the operating status, the low-temperature refrigeration air conditioner machine is calculated
The suction superheat of group, if the suction superheat controls the electric heater unit to open not less than the first preset temperature.
Preferably, further include：
If the downtime is not up to first preset time, the compressor starts are controlled to run.
Preferably, further include：
If the suction superheat exceedes first preset temperature, the electric heater unit is controlled to close.
Preferably, the suction superheat for calculating the low-temperature refrigeration air conditioner unit includes：
Determine the suction temperature and evaporating temperature of the compressor；
The difference that the suction temperature subtracts the evaporating temperature is calculated, obtains the suction superheat.
Preferably, further include：
If the current state of the low-temperature refrigeration air conditioner unit is the holding state, if stand-by time is pre- not less than the 3rd
If the time, control the electric heater unit to maintain opening, otherwise, the electric heater unit is controlled every the 4th preset time
Open, open the 5th preset time every time.
A kind of low-temperature refrigeration air conditioner unit electric heating control device, the low-temperature refrigeration air conditioner unit include compressor and set
The electric heater unit on the compressor is put, including：
Detection module, the state current for detecting the low-temperature refrigeration air conditioner unit, the state include shutdown status,
Holding state and operating status；
First control module, if the state current for the low-temperature refrigeration air conditioner unit is the shutdown status, receives
To after power-on instruction, if downtime reaches the first preset time, after controlling the electric heater unit to open the second preset time
The compressor starts are controlled to run；
Second control module, if the state current for the low-temperature refrigeration air conditioner unit is the operating status, calculates
The suction superheat of the low-temperature refrigeration air conditioner unit, if the suction superheat not less than the first preset temperature, described in control
Electric heater unit is opened.
Preferably, further include：
3rd control module, if being not up to first preset time for the downtime, controls the compressor
Bring into operation.
Preferably, further include：
4th control module, if exceeding first preset temperature for the suction superheat, controls the electrical heating
Device is closed.
Preferably, the second control module includes：
Computing unit, for calculating the suction superheat of the low-temperature refrigeration air conditioner unit；
The computing unit includes determination subelement and computation subunit；
The determination subelement, for determining the suction temperature and evaporating temperature of the compressor；
The computation subunit, the difference of the evaporating temperature is subtracted for calculating the suction temperature, obtains the suction
The gas degree of superheat.
Preferably, further include：
5th control module, if the state current for the low-temperature refrigeration air conditioner unit is the holding state, if treating
The machine time not less than the 3rd preset time, controls the electric heater unit to maintain opening, otherwise, every the 4th preset time
Control the electric heater unit to open, open the 5th preset time every time.
A kind of low-temperature refrigeration air conditioner unit electric-heating control system, including：
Controller, the compressor being connected with the controller, and the electric heater unit being arranged on the compressor；
The operation of the controller includes：The current state of the low-temperature refrigeration air conditioner unit is detected, the state includes
Shutdown status, holding state and operating status；If the current state of the low-temperature refrigeration air conditioner unit is the shutdown status, connect
After receiving power-on instruction, if downtime reaches the first preset time, the electric heater unit is controlled to open the second preset time
After control the compressor starts to run；If the current state of the low-temperature refrigeration air conditioner unit is the operating status, calculate
The suction superheat of the low-temperature refrigeration air conditioner unit, if the suction superheat not less than the first preset temperature, described in control
Electric heater unit is opened.
Preferably, the operation of the controller further includes：
If the current state of the low-temperature refrigeration air conditioner unit is the holding state, if stand-by time is pre- not less than the 3rd
If the time, control the electric heater unit to maintain opening, otherwise, the electric heater unit is controlled every the 4th preset time
Open, open the 5th preset time every time.
It can be seen via above technical scheme that compared with prior art, the present invention provides a kind of low-temperature refrigeration air conditioner machine
Group electric heating controlling method, device and system.Low-temperature refrigeration air conditioner unit electric heating controlling method provided by the invention, is examined first
The current state of the low-temperature refrigeration air conditioner unit is surveyed, the state includes shutdown status, holding state and operating status, if institute
It is the shutdown status to state the current state of low-temperature refrigeration air conditioner unit, after power-on instruction is received, if downtime reaches
First preset time, then control the electric heater unit to open the second preset time, to prevent compressor band liquid, then controls again
The compressor starts operation, so as to avoid producing the risk of compressor liquid hammer, if the low-temperature refrigeration air conditioner unit is worked as
Preceding state is the operating status, the suction superheat of the low-temperature refrigeration air conditioner unit is calculated, if the suction superheat
Not less than the first preset temperature, then it may make compressor band liquid, control the electric heater unit to open at this time, to prevent
The problem of compressor band liquid, so as to avoid producing the risk of compressor liquid hammer.Therefore, technical solution provided by the invention,
It can effectively prevent unit complete machine from being powered on (after power-off) when restarting and in unit running process the problem of compressor band liquid, so as to keep away
Exempt from the risk of generation compressor liquid hammer, can preferably protect compressor.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is attached drawing needed in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
The embodiment of invention, for those of ordinary skill in the art, without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of flow chart of low-temperature refrigeration air conditioner unit electric heating controlling method provided in an embodiment of the present invention；
Fig. 2 is a kind of structure chart of low-temperature refrigeration air conditioner unit electric heating control device provided in an embodiment of the present invention.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment, belongs to the scope of protection of the invention.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, it is below in conjunction with the accompanying drawings and specific real
Applying mode, the present invention is described in further detail.
Embodiment
Referring to Fig. 1, Fig. 1 is a kind of low-temperature refrigeration air conditioner unit electric heating controlling method provided in an embodiment of the present invention
Flow chart.Low-temperature refrigeration air conditioner unit electric heating controlling method provided in an embodiment of the present invention, the low-temperature refrigeration air conditioner unit
Including compressor and the electric heater unit being arranged on the compressor.As shown in Figure 1, this method includes：
Step S101, detects the current state of the low-temperature refrigeration air conditioner unit；
Specifically, the state includes shutdown status, holding state and operating status.The shutdown status refers to described low
Warm refrigeration air-conditioning unit complete machine is in off-position, i.e., does not connect alternating current；The holding state refers to the low-temperature refrigeration air conditioner machine
Group complete machine has connect alternating current, current idle and off-duty.
Step S102, if the current state of the low-temperature refrigeration air conditioner unit is the shutdown status, receives start and refers to
After order, if downtime reaches the first preset time, the electric heater unit is controlled to open after the second preset time described in control
Compressor starts are run；
Specifically, if downtime reaches the first preset time, it is possible that the problem of compressor band liquid, at this time,
Control the electric heater unit to open the second preset time to solve the problems, such as the compressor band liquid being likely to occur, then control again
The compressor starts operation, can prevent compressor flooded starts and operation, so as to prevent compressor liquid hammer
Risk.
Step S103, if the current state of the low-temperature refrigeration air conditioner unit is the operating status, calculates the low temperature
The suction superheat of refrigeration air-conditioning unit, if the suction superheat controls the electrical heating to fill not less than the first preset temperature
Put unlatching；
If specifically, the suction superheat not less than the first preset temperature, illustrates that abnormal (such as unit occurs in unit
Load changes in operation), it is possible that the problem of compressor band liquid, at this time, control the electric heater unit to open with
Solve the problems, such as the compressor band liquid being likely to occur, compressor band liquid can be avoided to run, so as to prevent compressor
The risk of liquid hammer.
Optionally, first preset temperature is 4 degrees Celsius.
Optionally, the suction superheat for calculating the low-temperature refrigeration air conditioner unit includes：
Determine the suction temperature and evaporating temperature of the compressor；
Optionally, the suction temperature is obtained by being arranged on the temperature sensing package of compressor air suction mouth, by being arranged on compression
The pressure sensor of machine air entry obtains unit refrigerant evaporation pressure value, and institute is calculated by the unit refrigerant evaporation pressure value
State evaporating temperature.
The difference that the suction temperature subtracts the evaporating temperature is calculated, obtains the suction superheat.
Specifically, the electric heater unit includes heat tape.
Low-temperature refrigeration air conditioner unit electric heating controlling method provided in an embodiment of the present invention, detects the cryogenic refrigeration first
The current state of air-conditioner set, the state includes shutdown status, holding state and operating status, if the low-temperature refrigeration air conditioner
The current state of unit is the shutdown status, after power-on instruction is received, if downtime reaches the first preset time,
Control the electric heater unit to open the second preset time, to prevent compressor band liquid, then control the compressor starts again
Operation, so as to avoid producing the risk of compressor liquid hammer, if the current state of the low-temperature refrigeration air conditioner unit is described
Operating status, calculates the suction superheat of the low-temperature refrigeration air conditioner unit, if the suction superheat is default not less than first
Temperature, then may make compressor band liquid, control the electric heater unit to open at this time, to prevent compressor asking with liquid
Topic, so as to avoid producing the risk of compressor liquid hammer.Therefore, technical solution provided in an embodiment of the present invention, can be effective
Prevent unit complete machine from being powered on (after power-off) when restarting and in unit running process the problem of compressor band liquid, so as to avoid producing pressure
The risk of contracting machine liquid hammer, can preferably protect compressor.
Optionally, the technical solution that another embodiment of the present invention provides, the step S102 are further included：
If the downtime is not up to first preset time, the compressor starts are controlled to run.
Optionally, the technical solution that another embodiment of the present invention provides, the step S103 are further included：
If the suction superheat exceedes first preset temperature, the electric heater unit is controlled to close.
Optionally, the technical solution that another embodiment of the present invention provides, further includes：
If the current state of the low-temperature refrigeration air conditioner unit is the holding state, if stand-by time is pre- not less than the 3rd
If the time, control the electric heater unit to maintain opening, otherwise, the electric heater unit is controlled every the 4th preset time
Open, open the 5th preset time every time.
Specifically, such as described 4th preset time is 5 minutes, the 5th preset time is 10 minutes, then, if 9:00
Shi Suoshu stand-by times reach the 3rd preset time, then, (9:00~9:05) period controls the electric heater unit to close
Close, (9:05~9:15) the period control electric heater unit maintenance opening, (9:15~9:20) period control institute
State electric heater unit to close, (9:20~9:30) period controls the electric heater unit to maintain opening, and so on.
That is the technical solution that another embodiment of the present invention provides, is opened using electric heater unit described in intermittency check, and
Electric heater unit unlatching is not always maintained in the prior art, can avoid being always maintained at electric add under unit long-time holding state
Thermal opens caused energy waste problem, while can also solve unit holding state lower short time solution dehumidification while migration, separately
Outside, it can also prevent that being always maintained at electric heater unit unlatching in the prior art causes unit working environment high, and then cause oil temperature
The problem of height, compressor electric motor cooling is abnormal.
In order to illustrate technical solution provided by the invention more fully hereinafter, corresponding to low temperature system provided in an embodiment of the present invention
Cold air-conditioner set electric heating controlling method, the present invention disclose a kind of low-temperature refrigeration air conditioner unit electric heating control device.
Referring to Fig. 2, Fig. 2 is a kind of low-temperature refrigeration air conditioner unit electric heating control device provided in an embodiment of the present invention
Structure chart.Low-temperature refrigeration air conditioner unit electric heating control device provided in an embodiment of the present invention, the low-temperature refrigeration air conditioner unit
Including compressor and the electric heater unit being arranged on the compressor.As shown in Fig. 2, the device is applied to the control of system
Device, including：
Detection module 201, the state current for detecting the low-temperature refrigeration air conditioner unit, the state include shutting down shape
State, holding state and operating status；
First control module 202, if the state current for the low-temperature refrigeration air conditioner unit is the shutdown status, connects
After receiving power-on instruction, if downtime reaches the first preset time, the electric heater unit is controlled to open the second preset time
After control the compressor starts to run；
Second control module 203, if the state current for the low-temperature refrigeration air conditioner unit is the operating status, meter
The suction superheat of the low-temperature refrigeration air conditioner unit is calculated, if the suction superheat controls institute not less than the first preset temperature
State electric heater unit unlatching.
Optionally, second control module 203 includes：
Computing unit, for calculating the suction superheat of the low-temperature refrigeration air conditioner unit；
The computing unit includes determination subelement and computation subunit；
The determination subelement, for determining the suction temperature and evaporating temperature of the compressor；
The computation subunit, the difference of the evaporating temperature is subtracted for calculating the suction temperature, obtains the suction
The gas degree of superheat.
Low-temperature refrigeration air conditioner unit electric heating control device provided in an embodiment of the present invention, can effectively prevent unit complete machine
(after power-off) powers on when restarting and in unit running process the problem of compressor band liquid, so as to avoid producing the wind of compressor liquid hammer
Danger, can preferably protect compressor.
Optionally, the low-temperature refrigeration air conditioner unit electric heating control device that another embodiment of the present invention provides, is also wrapped
Include：
3rd control module, if being not up to first preset time for the downtime, controls the compressor
Bring into operation.
Optionally, the low-temperature refrigeration air conditioner unit electric heating control device that another embodiment of the present invention provides, is also wrapped
Include：
4th control module, if exceeding first preset temperature for the suction superheat, controls the electrical heating
Device is closed.
Optionally, the low-temperature refrigeration air conditioner unit electric heating control device that another embodiment of the present invention provides, is also wrapped
Include：
5th control module, if the state current for the low-temperature refrigeration air conditioner unit is the holding state, if treating
The machine time not less than the 3rd preset time, controls the electric heater unit to maintain opening, otherwise, every the 4th preset time
Control the electric heater unit to open, open the 5th preset time every time.
In order to illustrate technical solution provided by the invention more fully hereinafter, corresponding to low temperature system provided in an embodiment of the present invention
Cold air-conditioner set electric heating controlling method, invention additionally discloses a kind of low-temperature refrigeration air conditioner unit electric-heating control system, specifically
Content is as follows:
A kind of low-temperature refrigeration air conditioner unit electric-heating control system, including：
Controller, the compressor being connected with the controller, and the electric heater unit being arranged on the compressor；
The operation of the controller includes：The current state of the low-temperature refrigeration air conditioner unit is detected, the state includes
Shutdown status, holding state and operating status；If the current state of the low-temperature refrigeration air conditioner unit is the shutdown status, connect
After receiving power-on instruction, if downtime reaches the first preset time, the electric heater unit is controlled to open the second preset time
After control the compressor starts to run；If the current state of the low-temperature refrigeration air conditioner unit is the operating status, calculate
The suction superheat of the low-temperature refrigeration air conditioner unit, if the suction superheat not less than the first preset temperature, described in control
Electric heater unit is opened.
Optionally, the low-temperature refrigeration air conditioner unit electric-heating control system that another embodiment of the present invention provides, it is described
The operation of controller further includes：
If the downtime is not up to first preset time, the compressor starts are controlled to run.
Optionally, the low-temperature refrigeration air conditioner unit electric-heating control system that another embodiment of the present invention provides, it is described
The operation of controller further includes：
If the suction superheat exceedes first preset temperature, the electric heater unit is controlled to close.
Optionally, the low-temperature refrigeration air conditioner unit electric-heating control system that another embodiment of the present invention provides, it is described
The operation of controller further includes：
If the current state of the low-temperature refrigeration air conditioner unit is the holding state, if stand-by time is pre- not less than the 3rd
If the time, control the electric heater unit to maintain opening, otherwise, the electric heater unit is controlled every the 4th preset time
Open, open the 5th preset time every time.
It can be seen via above technical scheme that compared with prior art, the present invention provides a kind of low-temperature refrigeration air conditioner machine
Group electric heating controlling method, device and system.Low-temperature refrigeration air conditioner unit electric heating controlling method provided by the invention, is examined first
The current state of the low-temperature refrigeration air conditioner unit is surveyed, the state includes shutdown status, holding state and operating status, if institute
It is the shutdown status to state the current state of low-temperature refrigeration air conditioner unit, after power-on instruction is received, if downtime reaches
First preset time, then control the electric heater unit to open the second preset time, to prevent compressor band liquid, then controls again
The compressor starts operation, so as to avoid producing the risk of compressor liquid hammer, if the low-temperature refrigeration air conditioner unit is worked as
Preceding state is the operating status, the suction superheat of the low-temperature refrigeration air conditioner unit is calculated, if the suction superheat
Not less than the first preset temperature, then it may make compressor band liquid, control the electric heater unit to open at this time, to prevent
The problem of compressor band liquid, so as to avoid producing the risk of compressor liquid hammer.Therefore, technical solution provided by the invention,
It can effectively prevent unit complete machine from being powered on (after power-off) when restarting and in unit running process the problem of compressor band liquid, so as to keep away
Exempt from the risk of generation compressor liquid hammer, can preferably protect compressor.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or order.Moreover, term " comprising ", "comprising" or its any other variant meaning
Covering non-exclusive inclusion, so that process, method, article or equipment including a series of elements not only include that
A little key elements, but also including other elements that are not explicitly listed, or further include for this process, method, article or
The intrinsic key element of equipment.In the absence of more restrictions, the key element limited by sentence "including a ...", is not arranged
Except also there are other identical element in the process, method, article or apparatus that includes the element.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.For device disclosed in embodiment
For system, due to its with embodiment disclosed in method part it is corresponding, so description is fairly simple, related part referring to
Method part illustration.
Can directly it be held with reference to the step of method or algorithm that the embodiments described herein describes with hardware, processor
Capable software module, or the two combination are implemented.Software module can be placed in random access memory (RAM), memory, read-only deposit
Any other shape well known in reservoir (ROM), electrically programmable ROM, electrically erasable ROM, register or technical field
In the storage medium of formula.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or use the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and the principles and novel features disclosed herein phase one
The most wide scope caused.
Claims (9)
1. a kind of low-temperature refrigeration air conditioner unit electric heating controlling method, the low-temperature refrigeration air conditioner unit includes compressor and setting
Electric heater unit on the compressor, it is characterised in that including：
The current state of the low-temperature refrigeration air conditioner unit is detected, the state includes shutdown status, holding state and operation shape
State；
If the current state of the low-temperature refrigeration air conditioner unit is the shutdown status, after receiving power-on instruction, if shut down
Between reach the first preset time, control the electric heater unit to control the compressor starts to transport after opening the second preset time
OK；
If the current state of the low-temperature refrigeration air conditioner unit is the operating status, the low-temperature refrigeration air conditioner unit is calculated
Suction superheat, if the suction superheat controls the electric heater unit to open not less than the first preset temperature；
If the current state of the low-temperature refrigeration air conditioner unit is the holding state, if stand-by time is default not less than the 3rd
Between, control the electric heater unit to maintain opening, otherwise, control the electric heater unit to open every the 4th preset time
Open, open the 5th preset time every time.
2. according to the method described in claim 1, it is characterized in that, further include：
If the downtime is not up to first preset time, the compressor starts are controlled to run.
3. according to the method described in claim 1, it is characterized in that, further include：
If the suction superheat exceedes first preset temperature, the electric heater unit is controlled to close.
4. the according to the method described in claim 1, it is characterized in that, air-breathing mistake for calculating the low-temperature refrigeration air conditioner unit
Temperature includes：
Determine the suction temperature and evaporating temperature of the compressor；
The difference that the suction temperature subtracts the evaporating temperature is calculated, obtains the suction superheat.
5. a kind of low-temperature refrigeration air conditioner unit electric heating control device, the low-temperature refrigeration air conditioner unit includes compressor and setting
Electric heater unit on the compressor, it is characterised in that including：
Detection module, the state current for detecting the low-temperature refrigeration air conditioner unit, the state include shutdown status, standby
State and operating status；
First control module, if the state current for the low-temperature refrigeration air conditioner unit is the shutdown status, receives out
After machine instruction, if downtime reaches the first preset time, the electric heater unit is controlled to be controlled after opening the second preset time
The compressor starts operation；
Second control module, if the state current for the low-temperature refrigeration air conditioner unit is the operating status, described in calculating
The suction superheat of low-temperature refrigeration air conditioner unit, if the suction superheat controls the electricity to add not less than the first preset temperature
Thermal is opened；
5th control module, if the state current for the low-temperature refrigeration air conditioner unit is the holding state, if when standby
Between not less than the 3rd preset time, control the electric heater unit to maintain opening, otherwise, controlled every the 4th preset time
The electric heater unit is opened, and opens the 5th preset time every time.
6. device according to claim 5, it is characterised in that further include：
3rd control module, if being not up to first preset time for the downtime, controls the compressor starts
Operation.
7. device according to claim 5, it is characterised in that further include：
4th control module, if exceeding first preset temperature for the suction superheat, controls the electric heater unit
Close.
8. device according to claim 5, it is characterised in that the second control module includes：
Computing unit, for calculating the suction superheat of the low-temperature refrigeration air conditioner unit；
The computing unit includes determination subelement and computation subunit；
The determination subelement, for determining the suction temperature and evaporating temperature of the compressor；
The computation subunit, the difference of the evaporating temperature is subtracted for calculating the suction temperature, obtains the air-breathing mistake
Temperature.
A kind of 9. low-temperature refrigeration air conditioner unit electric-heating control system, it is characterised in that including：
Controller, the compressor being connected with the controller, and the electric heater unit being arranged on the compressor；
The operation of the controller includes：The current state of the low-temperature refrigeration air conditioner unit is detected, the state includes shutting down
State, holding state and operating status；If the current state of the low-temperature refrigeration air conditioner unit is the shutdown status, receive
After power-on instruction, if downtime reaches the first preset time, the electric heater unit is controlled to be controlled after opening the second preset time
Make the compressor starts operation；If the current state of the low-temperature refrigeration air conditioner unit is the operating status, described in calculating
The suction superheat of low-temperature refrigeration air conditioner unit, if the suction superheat controls the electricity to add not less than the first preset temperature
Thermal is opened；If the current state of the low-temperature refrigeration air conditioner unit is the holding state, if stand-by time is not less than
Three preset times, control the electric heater unit to maintain opening, otherwise, the electrical heating are controlled every the 4th preset time
Device is opened, and opens the 5th preset time every time.
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| EP3321603B1 (en) * | 2016-08-16 | 2019-05-22 | Mitsubishi Electric Corporation | Air conditioning device |
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| CN106440589B (en) * | 2016-11-03 | 2019-07-26 | 广东美的暖通设备有限公司 | A kind of method for heating and controlling, system and the air conditioner of crankcase heating tape |
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| US11435125B2 (en) | 2019-01-11 | 2022-09-06 | Carrier Corporation | Heating compressor at start-up |
| US11624539B2 (en) | 2019-02-06 | 2023-04-11 | Carrier Corporation | Maintaining superheat conditions in a compressor |
| CN110762914A (en) * | 2019-10-25 | 2020-02-07 | 青岛海尔空调电子有限公司 | Method for controlling heating belt of compressor |
| CN113654178B (en) * | 2021-07-30 | 2023-05-26 | 青岛海尔空调电子有限公司 | Method for starting air conditioner compressor |
| CN113758048B (en) * | 2021-08-12 | 2024-04-19 | 深圳市派沃新能源科技股份有限公司 | Air source heat pump low temperature protection system |
| CN114353361A (en) * | 2022-01-07 | 2022-04-15 | 青岛海尔空调电子有限公司 | Method and device for controlling refrigeration and freezing unit and refrigeration and freezing unit |
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