CN106642417A - Air conditioner and low-temperature refrigeration method thereof - Google Patents
Air conditioner and low-temperature refrigeration method thereof Download PDFInfo
- Publication number
- CN106642417A CN106642417A CN201611219727.4A CN201611219727A CN106642417A CN 106642417 A CN106642417 A CN 106642417A CN 201611219727 A CN201611219727 A CN 201611219727A CN 106642417 A CN106642417 A CN 106642417A
- Authority
- CN
- China
- Prior art keywords
- air
- temperature
- conditioner
- cryogenic refrigeration
- refrigeration method
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/06—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
- F24F3/065—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units with a plurality of evaporators or condensers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
-
- 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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
-
- 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
- F25B41/26—Disposition of valves, e.g. of on-off valves or flow control valves of fluid flow reversing valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
-
- 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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
-
- 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
- F25B2600/25—Control of valves
-
- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2117—Temperatures of an evaporator
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Fluid Mechanics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to the technical field of air conditioner low-temperature refrigeration and provides an air conditioner and a low-temperature refrigeration method thereof. The air conditioner comprises a compressor and a refrigerant channel communicated with the inlet end and the outlet end of the compressor. The refrigerant channel is provided with at least one heat exchanger located indoors and multiple heat exchangers located outdoors. A throttling part and a valve body are connected between every two adjacent heat exchangers in parallel, thus, part of the heat exchangers serving as condensers can be converted into evaporators through switching-on-off control of all the valve bodies, the temperature of refrigerant is raised, and beneficial contributions are made for preventing freezing of an indoor unit. In addition, according to the method, the temperature of the heat exchangers located indoors and used as the evaporators serves as a threshold value for judging whether part of the condensers are converted into the evaporators, and therefore the operating state that the anti-freezing requirement can be met, and it can be guaranteed that the air conditioner has better energy efficiency is found through multiple times of judgment and adjustment.
Description
Technical field
The present invention relates to air-conditioner low-temperature refrigeration technology field, specifically provides a kind of air-conditioner and its cryogenic refrigeration side
Method.
Background technology
Room also needs to persistently freeze when very low for many site surrounding temperature, but, common air-conditioning is compared with low temperature ring
Due to existing, system pressure is relatively low, the more low factor of compressor exhaust temperature during the operation refrigeration of border, so room easily occurs in system
The phenomenon that interior machine anti-freeze protection is shut down, and compressor operating is unreliable.
The content of the invention
(1) technical problem to be solved
The present invention is to solve existing air-conditioner indoor set in cryogenic refrigeration can frequently occur anti-freeze protection shut down,
And the insecure technical problem of compressor operating.
(2) technical scheme
To solve above-mentioned technical problem, the invention provides a kind of air-conditioner, the air-conditioner is including compressor and connects institute
The arrival end of compressor and the coolant path of the port of export are stated, the coolant path is provided with least one and is located at indoor heat exchanger
With multiple heat exchangers being located outside；On the coolant path, throttle part is equipped between every two adjacent heat exchangers,
Each described throttle part is parallel with valve body.
Preferably, the quantity positioned at indoor heat exchanger is one.
Preferably, the quantity of the heat exchanger being located outside is three.
Preferably, also including cross valve, two interfaces of the cross valve respectively with the arrival end of the compressor and go out
Mouth end connection, two other interface of the cross valve is connected respectively with the two ends of the coolant path, and the cross valve is used for
The arrival end and the port of export for making the coolant path and the compressor is cut between positive on-state and reverse on-state
Change.
Preferably, also including the first controller and the first temperature-detecting device；First temperature-detecting device is used to examine
Location is used for according to the temperature-detecting device in the temperature of heat exchanger indoor and as evaporimeter, first controller
Detected temperature information and control the opening and closing of multiple valve bodies.
Preferably, also including second controller and second temperature detection means；The second temperature detection means is used to examine
Outdoor temperature is surveyed, the second controller is used for the temperature information according to detected by the temperature-detecting device and controls multiple
The opening and closing of the valve body.
Present invention also offers a kind of cryogenic refrigeration method using air-conditioner as above, it is characterised in that include
Following steps：
S1, by the open and close controlling to each valve body, make air-conditioner refrigerating operaton and first setting duration after execution step
S2；
S2, judgement are located at whether the temperature of the indoor heat exchanger as evaporimeter is less than design temperature threshold value, if so, then
Execution step S3, if it is not, then execution step S4；
Whether S3, n-th valve body judged on refrigerant flow direction are closed mode, if so, then execution step S6, if
It is no, then execution step S5；
S4, air-conditioner keep current state operation；
S5, by the open and close controlling to each valve body, fractional distilling tube is converted into evaporimeter, through second setting duration after
Execution step S2；
S6, air-conditioner get in the defrost pattern of machine, and defrost pattern terminates rear execution step S1.
Preferably, in step sl, on refrigerant flow direction, by the way that last valve body is closed and by remaining valve
Body is opened and makes air-conditioner refrigerating operaton.
Preferably, in step s 2, the temperature of the heat exchanger is the pipe temperature temperature of heat exchanger.
Preferably, in step s 2, in step S3, n=1.
Preferably, step S4 also includes execution step S2.
Preferably, in step S4, air-conditioner is after keeping current state operation the 3rd to set duration, then execution step S2.
Preferably, in step S6, the defrost pattern is：Compressor is out of service, and indoor set keeps air-supply.
Preferably, in step S6, in defrost, the open and-shut mode of each valve body keeps constant to air-conditioner.
Preferably, in step S6, execution step S1 after defrost pattern terminates the 4th preset duration.
Preferably, the design temperature threshold value is -1～4 DEG C.
Preferably, the design temperature threshold value is 0 DEG C.
Preferably, a length of 3～5min during first setting.
Preferably, a length of 3min during first setting.
Preferably, a length of 3～5min during second setting.
Preferably, a length of 3min during second setting.
Preferably, in step S5, a condenser is converted into evaporimeter.
(3) beneficial effect
A kind of air-conditioner and its cryogenic refrigeration method that the present invention is provided, at least one are provided with coolant path and are located at room
Interior heat exchanger and multiple heat exchangers being located outside, and one group of restriction is arranged in parallel between per two adjacent heat exchangers
Part and valve body, from there through the open and close controlling to each valve body, are converted into evaporimeter, with this using part as the heat exchanger of condenser
Raise refrigerant temperature, to prevent indoor set from freezing to make favorable attributes.In addition, the method is also with being used as positioned at interior
The temperature of the heat exchanger of evaporimeter as the judgment threshold whether fractional distilling tube is converted into evaporimeter, with this by repeatedly sentencing
Disconnected and adjustment, seeking one kind can either meet deicing requirements, while and ensure that air-conditioner has the operation of preferable efficiency
State.
Description of the drawings
Fig. 1 is a kind of schematic diagram of air-conditioner of the embodiment of the present invention；
Fig. 2 is a kind of flow chart of the cryogenic refrigeration method of air-conditioner of the embodiment of the present invention.
Reference：
1st, compressor；2nd, heat exchanger；3rd, throttle part；4th, valve body；5th, temperature-detecting device；6th, cross valve.
Specific embodiment
With reference to the accompanying drawings and examples, the specific embodiment of the present invention is described in further detail.Hereinafter implement
Example is not limited to the scope of the present invention for illustrating the present invention.
As shown in figure 1, a kind of air-conditioner that the present invention is provided, including compressor 1 and the arrival end for connecting the compressor 1
With the coolant path of the port of export, the two ends of coolant path directly can connect with the arrival end and the port of export of compressor 1, that is, constitute one
Plant single cold type air-conditioner；Coolant path is provided with one and is located at indoor heat exchanger 2 and three heat exchangers 2 being located outside, i.e.,
Three heat exchangers 2 being located outside and a heat exchanger 2 for being located at interior are sequentially connected in series on coolant path；Per adjacent two
Throttle part 3 is also equipped between heat exchanger 2, the throttle part 3 can be capillary, or electric expansion valve, and often
Individual throttle part 3 is also parallel with valve body 4, i.e., the coolant path between every two adjacent heat exchangers 2 is divided into two branch roads,
Throttle part 3 is set on one of branch road, valve body 4 is set on another branch road.
In refrigerating operaton, when that valve body 4 between the heat exchanger 2 positioned at interior and the heat exchanger 2 being located outside is closed
Close and when other valve bodies 4 are opened, the refrigerant of the high pressure gaseous that the port of export of compressor 1 sprays is first into being located at
In first outdoor heat exchanger 2, then pass sequentially through remaining two by the place branch road of valve body 4 of each unlatching and be located outside
Heat exchanger 2, so far, the gaseous coolant of HTHP is condensed into medium temperature and medium pressure in these three heat exchangers being located outside 2
Liquid refrigerants, condenser of three heat exchangers 2 being located outside equivalent to air-conditioner.
In coolant path then, due to positioned at indoor heat exchanger 2 be located outside between corresponding heat exchanger 2 that
The place branch road of bar valve body 4 is shut, therefore, the liquid coolant of medium temperature and medium pressure is had to be flowed into by the throttle part 3 of another branch road
In indoor heat exchanger 2, and refrigerant is when by the throttle part 3, because pressure is drastically reduced, the liquid of medium temperature and medium pressure
Refrigerant is changed into the gaseous coolant of low-temp low-pressure, and the gaseous coolant of low-temp low-pressure is then flowed into indoor heat exchanger 2, led to
The tube wall and room air for crossing the heat exchanger 2 is exchanged heat, and room air is formed and is cooled down, i.e. positioned at the valve body 4 of above-mentioned closing
Evaporimeter of the heat exchanger 2 afterwards equivalent to air-conditioner.
From the foregoing, it will be observed that on the direction of refrigerant flowing, the heat exchanger 2 before the valve body 4 closed is configured to air-conditioner
Condenser, and be located at the evaporimeter that the heat exchanger 2 after the valve body 4 of closing is then configured to air-conditioner；And it is multiple due to closing
Which in valve body 4 is selectable, so, condenser is adjustable with the relative scale of evaporimeter, i.e., often control is reduced
While one condenser, an evaporimeter can be accordingly increased.
Thus, on the one hand, the impact of the reduction to system of condenser is singly seen, due to changing for the gaseous coolant to HTHP
Hot area is reduced, so, relative to the state for not reducing condenser, less refrigerant is changed into liquid, and the refrigerant before throttling
Initial temperature it is also higher, thus make the temperature of the refrigerant after throttling can be higher.
On the other hand, the impact of the increase to system of evaporimeter is singly seen, due to the heat-transfer surface of the gaseous coolant of low-temp low-pressure
Product is increased, so, relative to the state for not increasing evaporimeter, being flowed into the refrigerant of evaporimeter tail portion can suck more
Heat, that is, the temperature of the refrigerant being flowed into indoor set is higher.
Therefore, in general, in cryogenic refrigeration, the heat exchanger 2 in indoor set is found has risk of icing to this air-conditioner
When, the selective valve body 4 closed can be moved forward on coolant path, to realize reducing heat exchange area and the increase of condenser simultaneously
The effect of the heat exchange area of evaporimeter, and under the influence of this double action, the refrigerant in indoor set heat exchanger 2 not only can be made
Heat up faster, the extreme value of refrigerant intensification can also be expanded, therefore indoor machine evaporation is tied when can effectively prevent cryogenic refrigeration
The phenomenon of ice occurs.In addition, this air-conditioner not only can be in cryogenic refrigeration by the extreme value of increase indoor machine evaporation high temperature
And effectively prevent indoor set from freezing, can with normal work by increase condenser heat exchange area and improve indoor set
The extreme value of the low temperature of heat exchanger 2, thus can also improve refrigeration.
Further, since the multiple heat exchangers 2 in off-premises station lean on nearer, therefore can also to a certain extent improve throttling
The temperature of front refrigerant, further improves the temperature that refrigerant is entered into indoor set after throttling.
It should be noted that positioned at indoor heat exchanger 2 quantity and be not limited to one shown in accompanying drawing, may be used also
Being two or more multiple；The heat exchanger 2 being located outside also and is not limited to three shown in accompanying drawing, may be used also
Be two, four or more.
This air-conditioner can also be the double mode air-conditioner of changes in temperature including cross valve 6, two interfaces of cross valve 6 respectively with
The arrival end of compressor 1 is connected with the port of export, and two other interface of cross valve 6 is connected respectively with the two ends of coolant path, and four
Port valve 6 is used to make the arrival end and the port of export of coolant path and compressor 1 between positive on-state and reverse on-state
Switching, is achieved in switching between refrigeration mode and heating mode.
As to how know whether the heat exchanger 2 in indoor set has risk of icing, can be warm by the first controller and first
Degree detection means 5 is realized.Specifically, the first temperature-detecting device 5 is used for detection positioned at the indoor and heat exchanger as evaporimeter
2 temperature, i.e., by the temperature of the heat exchanger 2 in the direct access indoor set of the first temperature-detecting device 5；And controller is then used for
The temperature information according to detected by temperature-detecting device 5 and control the opening and closing of multiple valve bodies 4, i.e. when the first temperature-detecting device 5
When detected temperature value is less than design temperature threshold value, then the valve body 4 that is presently off of controller control open, while control exists
Certain valve body 4 that the front of valve body 4 is located in coolant path is closed, and makes fractional distilling tube be converted into evaporimeter, thus improves room
The temperature of refrigerant in interior machine evaporimeter, improves the resistance to frost of indoor machine evaporation.
Except it is above-mentioned know whether indoor set heat exchanger 2 has risk of icing in addition to, can also pass through second controller and second
Temperature-detecting device 5 is realized.Specifically, second temperature detection means 5 is used to detect outdoor temperature that second controller to be used for basis
Temperature information detected by temperature-detecting device 5 and control the opening and closing of multiple valve bodies 4.Due to 2, heat exchanger in indoor set
Raw risk of icing is caused because outdoor environment temperature is too low, that is to say, that outdoor temperature is lower, and the heat exchanger 2 in indoor set is got over
Easily freeze, therefore, whether the heat exchanger 2 that can be indirectly reflected in indoor set by outdoor environment temperature has risk of icing,
The decision threshold of outdoor temperature is determined according to the specific model of air-conditioner, and then the opening and closing of each valve body 4 as described above can be taken to grasp
Make.
In addition, it might even be possible to which mode completely manually controls the opening and closing of each valve body 4, i.e. can be by the opening and closing of each valve body 4
State is formed as the different gears on remote control, and each gear also corresponds to an outdoor temp angle value, means, works as operator
When member has found that outdoor temperature is relatively low, a gear can be selected according to its judgement, and then air-conditioner is according to control instruction, according to pre-
If program, the opening and closing of the corresponding valve body 4 of the corresponding control of air-conditioner, to meet deicing requirements.
As shown in Fig. 2 the present embodiment additionally provides a kind of cryogenic refrigeration method of air-conditioner as above, the method bag
Include following steps：
S1, by the open and close controlling to each valve body, make air-conditioner refrigerating operaton and first setting duration after execution step
S2；
Specifically, if it is desired to make air-conditioner refrigerating operaton, then a valve body is at least closed, multiple heat exchangers is divided into
Condenser and evaporimeter two parts, certainly, are also not excluded for, when compressor is double stage compressor, there is two-stage section simultaneously in system
The situation of stream；Further, since air-conditioner is in initial launch, the pipe temperature of the evaporimeter in indoor set needs the regular hour to become
Temperature, after the operation of one end time, just entering into more stable state, therefore can make air-conditioner in refrigerating operaton
Decision after one setting duration again in execution step S2, and the first setting duration can be 3～5min, preferably
3min。
In addition, on refrigerant flow direction, preferably by the way that last valve body is closed and remaining valve body unlatching is made
Air-conditioner refrigerating operaton, will last heat exchanger as evaporimeter, and using above so heat exchanger is as condenser,
So initial refrigeration is optimal, and then the temperature further according to evaporimeter is adjusted to the ratio of condenser and evaporimeter, most
Eventually on the premise of deicing requirements are met, it is ensured that optimal refrigeration.
S2, judgement are located at whether the temperature of the indoor heat exchanger as evaporimeter is less than design temperature threshold value, if so, then
Execution step S3, if it is not, then execution step S4；
Specifically, after air-conditioner stable operation, by the direct detection to the indoor heat exchanger as evaporimeter, come
The temperature whether accurately react it has the risk of icing, heat exchanger is preferably the pipe temperature temperature of heat exchanger, the temperature for so measuring
Angle value can more reflect actual conditions；Design temperature threshold value therein can be -1～4 DEG C, preferably 0 DEG C.
Whether S3, n-th valve body judged on refrigerant flow direction are closed mode, if so, then execution step S6, if
It is no, then execution step S5；
S4, air-conditioner keep current state operation；
When the temperature positioned at the indoor heat exchanger as evaporimeter and be not less than design temperature threshold value, illustrate air-conditioner with
Current state operation can't cause the risk that indoor set freezes, therefore air-conditioner can keep current state to run.But due to room
External environment is change, so outdoor temperature is possible to further reduction, and after outdoor temperature is reduced, the operation shape of air-conditioner
State just not necessarily disclosure satisfy that require that for anti-freeze, so after execution step S4, preferred execution step S2 again, and preferably exist
Current state operation the 3rd is kept to set after duration, then execution step S2, can so avoid insignificant frequent judgement.
S5, by the open and close controlling to each valve body, fractional distilling tube is converted into evaporimeter, through second setting duration after
Execution step S2；
The process of step S3 to S5 is specially：After judging to have risk of icing positioned at the indoor heat exchanger for making evaporimeter,
Should first attempt that part is just being served as into condenser by way of the selective valve body closed is moved forward in coolant path
Heat exchanger is transformed into evaporimeter and uses, and then verifies whether by step S2 again to have reached deicing requirements, if it is, continuing
Current state operation is kept, if it is not, then more condensers are converted into evaporimeter by execution step S5 again, it is reciprocal with this
Circulation, until it reaches till deicing requirements.Thus, while deicing requirements are realized, ensure that system has as far as possible higher
Efficiency, wherein, step S5 is not performed, preferably a condenser is converted into evaporimeter, such efficiency highest.
But in above process, condenser is converted into before evaporimeter, should first consider whether there is the condition of conversion, because
It is should at least to retain a heat exchanger as condenser, or is determined according to the specific model of air-conditioner and at least should retain several changing
Hot device should first judge whether to meet conversion condition as condenser, therefore before execution step S5, i.e., when n-th valve body is closed
When, illustrating that current condenser quantity can not be reduced again, usual n=1 at least retains a heat exchanger as condensation
Device, otherwise occurs that compressor returns the phenomenon of liquid and occurs, therefore air-conditioner needs to shut down defrost for a period of time.
Because air-conditioner by fractional distilling tube after evaporimeter is converted into, the pipe temperature of the evaporimeter in indoor set needs necessarily
Time alternating temperature, after the operation of one end time, just entering into more stable state, therefore air-conditioner can be made in system
Decision after the setting duration of cold operation second again in execution step S2, and the second setting duration can be 3～5min, it is excellent
Elect 3min as.
S6, air-conditioner get in the defrost pattern of machine, and defrost pattern terminates rear execution step S1；
Defrost pattern is a kind of pattern that air-conditioner generally possesses, usually compressor shutdown, and indoor fan is continued to run with,
The frost in indoor evaporator is eliminated by the heat exchange of room air or its hidden danger that frost occurs is eliminated.Wherein, air-conditioner exists
During defrost, the open and-shut mode of each valve body is preferably and keeps constant, because the open and-shut mode of current each valve body is then adaptable to defrost
Front outdoor temperature, and outdoor environment temperature will not be varied widely at short notice, so air-conditioner is after defrost is finished,
With the open and-shut mode operation of each valve body under previous state, current environmental condition can be directly adapted to, and need not be repeated one by one
Condenser is converted into the operation of evaporimeter.
In addition, in step S6, execution step S1 preferably after defrost pattern terminates the 4th preset duration, because air-conditioner exists
During into defrost pattern, illustrate that the condenser for being possible to be converted into evaporimeter by abovementioned steps converted, but so all
Do not eliminate the risk of frost, the outdoor environment temperature for illustrating now be it is too low, if air-conditioner after defrost immediately before
The open and-shut mode operation of each valve body under one state, that still may frosting again, so air-conditioner is preferably in defrost pattern frosting the
In execution step S1 after four preset durations, now outdoor environment temperature is possible to rise, but also still possibly too low, that
Air-conditioner is just only switched in of short duration refrigeration between defrost pattern.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, on the premise of without departing from the technology of the present invention principle, some improvement and replacement can also be made, these improve and replace
Also should be regarded as protection scope of the present invention.
Claims (22)
1. a kind of air-conditioner, it is characterised in that including compressor and connect the arrival end of the compressor and the refrigerant of the port of export
Path, the coolant path is provided with least one and is located at indoor heat exchanger and multiple heat exchangers being located outside；Described
On coolant path, throttle part is equipped between every two adjacent heat exchangers, each described throttle part is parallel with valve body.
2. air-conditioner according to claim 1, it is characterised in that the quantity positioned at indoor heat exchanger is.
3. air-conditioner according to claim 1, it is characterised in that the quantity of the heat exchanger being located outside is three.
4. air-conditioner according to claim 1, it is characterised in that also including cross valve, two interfaces of the cross valve
Connect with the arrival end and the port of export of the compressor respectively, two other interface of the cross valve is logical with the refrigerant respectively
The two ends connection on road, the cross valve is used to make the coolant path connect in forward direction with the arrival end and the port of export of the compressor
Switch between logical state and reverse on-state.
5. the air-conditioner according to any one of Claims 1-4, it is characterised in that also warm including the first controller and first
Degree detection means；First temperature-detecting device is used for the temperature that detection is located at heat exchanger indoor and as evaporimeter, institute
State the first controller and control opening for multiple valve bodies for the temperature information according to detected by the temperature-detecting device
Close.
6. the air-conditioner according to any one of Claims 1-4, it is characterised in that also warm including second controller and second
Degree detection means；The second temperature detection means is used to detect outdoor temperature that the second controller to be used for according to the temperature
Spend the temperature information detected by detection means and control the opening and closing of multiple valve bodies.
7. a kind of usage right requires the cryogenic refrigeration method of the air-conditioner described in 1 to 6 any one, it is characterised in that include with
Lower step：
S1, by the open and close controlling to each valve body, make air-conditioner refrigerating operaton and first setting duration after execution step S2；
S2, judgement are located at whether the temperature of the indoor heat exchanger as evaporimeter is less than design temperature threshold value, if so, then perform
Step S3, if it is not, then execution step S4；
Whether S3, n-th valve body judged on refrigerant flow direction are closed mode, if so, then execution step S6, if it is not,
Then execution step S5；
S4, air-conditioner keep current state operation；
S5, by the open and close controlling to each valve body, fractional distilling tube is converted into evaporimeter, through second setting duration after perform
Step S2；
S6, air-conditioner get in the defrost pattern of machine, and defrost pattern terminates rear execution step S1.
8. the cryogenic refrigeration method of air-conditioner according to claim 7, it is characterised in that in step sl, in refrigerant stream
On dynamic direction, by the way that last valve body is closed and remaining valve body unlatching is made into air-conditioner refrigerating operaton.
9. the cryogenic refrigeration method of air-conditioner according to claim 7, it is characterised in that in step s 2, the heat exchange
The temperature of device is the pipe temperature temperature of heat exchanger.
10. the cryogenic refrigeration method of air-conditioner according to claim 7, it is characterised in that in step s 2, step S3
In, n=1.
The cryogenic refrigeration method of 11. air-conditioners according to claim 7, it is characterised in that step S4 also includes performing step
Rapid S2.
The cryogenic refrigeration method of 12. air-conditioners according to claim 11, it is characterised in that in step S4, air-conditioner exists
Current state operation the 3rd is kept to set after duration, then execution step S2.
The cryogenic refrigeration method of 13. air-conditioners according to claim 7, it is characterised in that in step S6, the defrost mould
Formula is：Compressor is out of service, and indoor set keeps air-supply.
The cryogenic refrigeration method of 14. air-conditioners according to claim 7, it is characterised in that in step S6, air-conditioner is being changed
When white, the open and-shut mode of each valve body keeps constant.
The cryogenic refrigeration method of 15. air-conditioners according to claim 7, it is characterised in that in step S6, in defrost pattern
Terminate execution step S1 after the 4th preset duration.
The cryogenic refrigeration method of 16. air-conditioners according to claim 7, it is characterised in that the design temperature threshold value for-
1～4 DEG C.
The cryogenic refrigeration method of 17. air-conditioners according to claim 16, it is characterised in that the design temperature threshold value is
0℃。
The cryogenic refrigeration method of 18. air-conditioners according to claim 7, it is characterised in that a length of 3 during first setting
～5min.
The cryogenic refrigeration method of 19. air-conditioners according to claim 18, it is characterised in that a length of during first setting
3min。
The cryogenic refrigeration method of 20. air-conditioners according to claim 7, it is characterised in that a length of 3 during second setting
～5min.
The cryogenic refrigeration method of 21. air-conditioners according to claim 20, it is characterised in that a length of during second setting
3min。
The cryogenic refrigeration method of 22. air-conditioners according to any one of claim 6 to 21, it is characterised in that in step S5,
One condenser is converted into evaporimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611219727.4A CN106642417B (en) | 2016-12-26 | 2016-12-26 | Air conditioner and low-temperature refrigeration method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611219727.4A CN106642417B (en) | 2016-12-26 | 2016-12-26 | Air conditioner and low-temperature refrigeration method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106642417A true CN106642417A (en) | 2017-05-10 |
| CN106642417B CN106642417B (en) | 2022-08-02 |
Family
ID=58827499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611219727.4A Active CN106642417B (en) | 2016-12-26 | 2016-12-26 | Air conditioner and low-temperature refrigeration method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106642417B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109282448A (en) * | 2018-09-19 | 2019-01-29 | 珠海格力电器股份有限公司 | Air conditioner control method and air conditioner capable of not stopping after reaching set temperature |
| CN110762678A (en) * | 2019-11-28 | 2020-02-07 | 无锡同方人工环境有限公司 | Air-cooled heat exchanger assembly and load-adjustable air conditioning system |
| CN110793159A (en) * | 2019-11-19 | 2020-02-14 | 宁波奥克斯电气股份有限公司 | Air conditioner refrigeration anti-freezing protection control method and device and air conditioner |
| CN112833584A (en) * | 2020-12-01 | 2021-05-25 | 青岛海尔新能源电器有限公司 | Heat pump module unit and anti-freezing control method thereof |
| CN113566380A (en) * | 2020-04-29 | 2021-10-29 | 宁波奥克斯电气股份有限公司 | Compressor heat dissipation device and method and air conditioner |
| CN113802352A (en) * | 2021-10-19 | 2021-12-17 | 珠海格力电器股份有限公司 | Control method and device for drying clothes by clothes washing and protecting equipment |
| CN114198817A (en) * | 2021-12-22 | 2022-03-18 | 珠海格力电器股份有限公司 | Air conditioning system, control method and air conditioner |
| CN114353277A (en) * | 2021-11-30 | 2022-04-15 | 珠海格力电器股份有限公司 | Anti-frosting control method and anti-frosting air conditioner |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0854149A (en) * | 1994-08-11 | 1996-02-27 | Matsushita Electric Ind Co Ltd | Refrigerating device |
| CN101639258A (en) * | 2008-07-31 | 2010-02-03 | Tcl集团股份有限公司 | Dehumidifying air conditioner and dehumidifying method thereof |
| CN202066256U (en) * | 2010-12-20 | 2011-12-07 | 广东美的制冷设备有限公司 | Air-cooled air conditioning system |
| CN204100635U (en) * | 2014-07-14 | 2015-01-14 | 珠海格力电器股份有限公司 | Environmental conditioning device for low-temperature laboratory |
| CN104832989A (en) * | 2015-04-29 | 2015-08-12 | 广东美的制冷设备有限公司 | Air conditioner and control method for air conditioner |
| CN105627432A (en) * | 2015-12-25 | 2016-06-01 | 珠海格力电器股份有限公司 | Air conditioning system and defrosting control method thereof |
| CN206310639U (en) * | 2016-12-26 | 2017-07-07 | 广州华凌制冷设备有限公司 | Air-conditioner |
-
2016
- 2016-12-26 CN CN201611219727.4A patent/CN106642417B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0854149A (en) * | 1994-08-11 | 1996-02-27 | Matsushita Electric Ind Co Ltd | Refrigerating device |
| CN101639258A (en) * | 2008-07-31 | 2010-02-03 | Tcl集团股份有限公司 | Dehumidifying air conditioner and dehumidifying method thereof |
| CN202066256U (en) * | 2010-12-20 | 2011-12-07 | 广东美的制冷设备有限公司 | Air-cooled air conditioning system |
| CN204100635U (en) * | 2014-07-14 | 2015-01-14 | 珠海格力电器股份有限公司 | Environmental conditioning device for low-temperature laboratory |
| CN104832989A (en) * | 2015-04-29 | 2015-08-12 | 广东美的制冷设备有限公司 | Air conditioner and control method for air conditioner |
| CN105627432A (en) * | 2015-12-25 | 2016-06-01 | 珠海格力电器股份有限公司 | Air conditioning system and defrosting control method thereof |
| CN206310639U (en) * | 2016-12-26 | 2017-07-07 | 广州华凌制冷设备有限公司 | Air-conditioner |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109282448A (en) * | 2018-09-19 | 2019-01-29 | 珠海格力电器股份有限公司 | Air conditioner control method and air conditioner capable of not stopping after reaching set temperature |
| CN110793159A (en) * | 2019-11-19 | 2020-02-14 | 宁波奥克斯电气股份有限公司 | Air conditioner refrigeration anti-freezing protection control method and device and air conditioner |
| CN110793159B (en) * | 2019-11-19 | 2021-10-26 | 宁波奥克斯电气股份有限公司 | Air conditioner refrigeration anti-freezing protection control method and device and air conditioner |
| CN110762678A (en) * | 2019-11-28 | 2020-02-07 | 无锡同方人工环境有限公司 | Air-cooled heat exchanger assembly and load-adjustable air conditioning system |
| CN113566380A (en) * | 2020-04-29 | 2021-10-29 | 宁波奥克斯电气股份有限公司 | Compressor heat dissipation device and method and air conditioner |
| CN112833584A (en) * | 2020-12-01 | 2021-05-25 | 青岛海尔新能源电器有限公司 | Heat pump module unit and anti-freezing control method thereof |
| CN112833584B (en) * | 2020-12-01 | 2022-11-15 | 青岛海尔新能源电器有限公司 | Heat pump module unit and anti-freezing control method thereof |
| CN113802352A (en) * | 2021-10-19 | 2021-12-17 | 珠海格力电器股份有限公司 | Control method and device for drying clothes by clothes washing and protecting equipment |
| CN114353277A (en) * | 2021-11-30 | 2022-04-15 | 珠海格力电器股份有限公司 | Anti-frosting control method and anti-frosting air conditioner |
| CN114198817A (en) * | 2021-12-22 | 2022-03-18 | 珠海格力电器股份有限公司 | Air conditioning system, control method and air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106642417B (en) | 2022-08-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106642417A (en) | Air conditioner and low-temperature refrigeration method thereof | |
| CN203231419U (en) | Air conditioner | |
| CN103363600B (en) | Heat pump type air conditioner | |
| CN101592414B (en) | Air conditioner | |
| CN203907965U (en) | An air-conditioner heat exchange system | |
| WO2019134509A1 (en) | Outdoor unit, air conditioning system, and control method | |
| CN103363601B (en) | Heat pump type air conditioner | |
| CN204593992U (en) | Air-conditioning equipment and defrost control system thereof | |
| CN103673138B (en) | Air-conditioner and control method thereof | |
| CN104329824A (en) | Multi-connected type air conditioner system and control method thereof | |
| CN106931676A (en) | Air-conditioning system and its defrosting control method | |
| CN107421072A (en) | Air conditioner and high-temperature-resistant control method thereof | |
| CN107940677A (en) | A kind of control method and device for slowing down air-conditioner outdoor unit frosting | |
| CN104197571A (en) | Three-pipe heat recovery multiple-on-line system | |
| CN207865750U (en) | Outdoor unit and air conditioning system | |
| CN201314725Y (en) | Heat pump type room air conditioner | |
| CN206310639U (en) | Air-conditioner | |
| CN111006301A (en) | Carbon dioxide cascade heating system and control method thereof | |
| CN206771795U (en) | Air-conditioning system | |
| CN209165825U (en) | Air conditioner | |
| CN210000324U (en) | Outdoor heat exchanger of air conditioner and heat pump air conditioner | |
| CN111720953A (en) | Air conditioner and control method thereof | |
| CN113375290B (en) | Air conditioner and control method thereof | |
| CN110595093A (en) | Air conditioning system | |
| CN206973925U (en) | Multiple on-line system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |