CN110094835A - A kind of cold medium flux adjusting method, device and air conditioner - Google Patents
A kind of cold medium flux adjusting method, device and air conditioner Download PDFInfo
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- CN110094835A CN110094835A CN201910424592.2A CN201910424592A CN110094835A CN 110094835 A CN110094835 A CN 110094835A CN 201910424592 A CN201910424592 A CN 201910424592A CN 110094835 A CN110094835 A CN 110094835A
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- temperature
- temperature difference
- control valve
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Classifications
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- 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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
-
- 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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
-
- 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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
Abstract
Cold medium flux adjusting method, device and air conditioner provided by the invention, it is related to air conditioner technical field, inlet temperature, middle portion temperature and the outlet temperature that this method and device pass through acquisition U-tube, and calculate first temperature difference and second temperature difference, since first temperature difference is middle portion temperature and the temperature difference that inlet temperature is formed, the cold medium flux of U-tube entrance to middle part has been reacted；Second temperature difference is the temperature difference that outlet temperature and inlet temperature are formed, and second temperature difference is the cold medium flux that the degree of superheat reflects U-tube entrance to exit.Cold medium flux is thus determined by first temperature difference, second temperature difference, and as benchmark adjusting control valve aperture to realize adjusting cold medium flux, can uniform cold medium flux, improve heat exchanger utilization rate, promotion user experience.
Description
Technical field
The present invention relates to air-conditioning technical fields, in particular to a kind of cold medium flux adjusting method, device and air-conditioning
Device.
Background technique
With economic continuous development, the application of air conditioner is also more and more extensive, since air conditioner can be by regulation room
Environment temperature brings comfortable experience for user, and air conditioner becomes most commonly seen one of household electrical appliance.
But in the prior art, each cold medium flux of heat exchanger is uneven, causes entire heat exchanger heat exchange uneven, to exchange heat
Device utilization rate is poor, and bad experience can be brought to user.
Summary of the invention
Problems solved by the invention be how uniform cold medium flux, reach the uniform effect of heat exchange.
To solve the above problems, the present invention provides a kind of cold medium flux adjusting method, which comprises
When air conditioner enters refrigeration mode, inlet temperature, middle portion temperature and the outlet temperature of U-tube are obtained；
Determine first temperature difference according to the middle portion temperature and the inlet temperature, and according to the outlet temperature with it is described
Inlet temperature determines second temperature difference；
Based on first temperature difference and second temperature difference adjusting control valve aperture.
It is to be appreciated that first temperature difference is middle portion temperature and the temperature difference that inlet temperature is formed, U-tube entrance has been reacted extremely
The cold medium flux at middle part；Second temperature difference is the temperature difference that outlet temperature and inlet temperature are formed, and second temperature difference is degree of superheat reflection
Cold medium flux of the U-tube entrance to exit.Cold medium flux is thus determined by first temperature difference, second temperature difference, and as
Benchmark adjusting control valve aperture to realizing adjusting cold medium flux, can uniform cold medium flux, improve heat exchanger utilization rate, promoted and used
Family experience sense.
Further, described the step of being based on first temperature difference and second temperature difference adjusting control valve aperture, includes:
When first temperature difference is in the first preset range, if second temperature difference less than the first preset value, according to
Presetting first adjusts control valve opening described in rule control and reduces；
If second temperature difference is greater than the second preset value, control valve described in rule control is adjusted according to presetting second
Aperture increases；
If second temperature difference is greater than or equal to first preset value and is less than or equal to second preset value, protect
It is constant to hold the control valve opening；Wherein, first preset value is less than second preset value.
It is to be appreciated that showing the middle portion temperature and inlet temperature of U-tube when first temperature difference is in the first preset range
Be not much different namely U-tube in the middle part of there are refrigerants.And when second temperature difference is less than the first preset value, show U-tube
Heat exchange amount is not enough to allow all refrigerants when reaching outlet with regard to evaporating completely, and refrigerant is on the high side to cause outlet temperature lower, thus needs
Control control valve opening reduces to reduce cold medium flux.When second temperature difference is greater than the second preset value, show the heat exchange amount of U-tube
So that refrigerant also not up to exports just evaporating completely, refrigerant is on the low side to cause outlet temperature higher, thus needs to control control
Valve opening increases to increase cold medium flux.When second temperature difference is greater than or equal to the first preset value and is less than or equal to the second preset value
When, show ability evaporating completely when the heat exchange amount of U-tube at this time makes refrigerant reach outlet just, the heat transfer rate of U-tube is most at this time
Excellent, heat transfer effect is best, because without control valve opening is adjusted.
Further, the method also includes:
When first temperature difference is in the first preset range, if second temperature difference is less than or equal to third preset value,
Control valve opening described in rule control then is adjusted according to presetting first to reduce, and is controlled rotation speed of fan and increased and control cold
The total liquid measure of matchmaker is reduced, wherein the third preset value is less than first preset value.
It is to be appreciated that showing that the degree of superheat is too small at this time, Ye Jileng when second temperature difference is less than or equal to third preset value
Matchmaker is too many, can not reduce refrigerant rapidly only by control control valve opening reduction, thus controls rotation speed of fan and increase, and increases
The heat exchange amount of U-tube, in order to evaporate more refrigerants；The total liquid measure of refrigerant is controlled simultaneously to reduce, and it is cold can be rapidly achieved reduction
The effect of matchmaker.
Further, the method also includes:
When first temperature difference is in the first preset range, if second temperature difference is greater than or equal to the 4th preset value,
It then adjusts control valve opening described in rule control according to presetting second to increase, and control rotation speed of fan to reduce and control cold
The total liquid measure of matchmaker increases, wherein the 4th preset value is greater than second preset value.
It is to be appreciated that showing that the degree of superheat is too high at this time, Ye Jileng when second temperature difference is greater than or equal to four preset values
Matchmaker is very little, increases the refrigerant that can not increase sharply only by control control valve opening, thus controls rotation speed of fan to reduce, and reduces
The heat exchange amount of U-tube, to reduce the refrigerant of evaporation；The total liquid measure of refrigerant is controlled simultaneously to increase, and can be rapidly achieved increase refrigerant
Effect.
Further, described the step of reducing according to control valve opening described in the first presetting adjusting rule control, wraps
It includes:
The control valve opening is controlled with the first presetting regulations speed to reduce.
Further, described the step of increasing according to control valve opening described in the second presetting adjusting rule control, wraps
It includes:
The control valve opening is controlled with the second presetting regulations speed to increase.
Further, it is described according to presetting first adjust the step of control valve opening described in rule control reduces or
After described the step of adjusting control valve opening increase described in rule control according to presetting second, the method also includes:
When second temperature difference is greater than or equal to first preset value and is less than or equal to second preset value, stop
Only adjust the control valve opening.
Further, it is described according to presetting first adjust the step of control valve opening described in rule control reduces or
After described the step of adjusting control valve opening increase described in rule control according to presetting second, the method also includes:
When the regulating time of acquisition is greater than or equal to presetting time threshold, stop adjusting the control valve opening,
Wherein, the regulating time is the time that the control control valve opening increases or reduces.
Second aspect, the present invention provides a kind of cold medium flux regulating device, described device includes:
Parameter acquisition module, for when air conditioner enters refrigeration mode, obtaining inlet temperature, the middle portion temperature of U-tube
And outlet temperature；
Computing module, for determining first temperature difference according to the middle portion temperature and the inlet temperature, and according to described
Outlet temperature and the inlet temperature determine second temperature difference；
Control module, for being based on first temperature difference and second temperature difference adjusting control valve aperture.
The third aspect, the present invention provides a kind of air conditioners, including controller, the first temperature sensor, second temperature to pass
Sensor, third temperature sensor and U-tube, first temperature sensor, the second temperature sensor, the third temperature
Degree sensor is respectively arranged at the inlet, middle part and exit of the U-tube, the controller and the first temperature sensing
Device, the second temperature sensor and the third temperature sensor are electrically connected；
First temperature sensor, the second temperature sensor, the third temperature sensor are respectively used to acquire
Inlet temperature, middle portion temperature and the outlet temperature of the U-tube, and by the inlet temperature, middle portion temperature and go out respectively
Mouth temperature is transmitted to the controller；
The controller is used to determine first temperature difference according to the middle portion temperature and the inlet temperature, and according to described
Outlet temperature and the inlet temperature determine second temperature difference；
The controller is also used to based on first temperature difference and second temperature difference adjusting control valve aperture.
Detailed description of the invention
Fig. 1 is the structural block diagram of air conditioner provided by the invention.
Fig. 2 is the circuit structure block diagram of air conditioner provided by the invention.
Fig. 3 is the flow chart of cold medium flux adjusting method provided by the invention.
Fig. 4 is the further flow chart of cold medium flux adjusting method provided by the invention.
Fig. 5 is the functional block diagram of cold medium flux regulating device provided by the invention.
Icon: 100- air conditioner；110- control valve；The first temperature sensor of 120-；130- second temperature sensor；140-
Third temperature sensor；150-U type pipe；160- controller；200- cold medium flux regulating device；210- parameter acquisition module；
220- computing module；230- control module.
Specific embodiment
To make the above purposes, features and advantages of the invention more obvious and understandable, with reference to the accompanying drawing to the present invention
Specific embodiment be described in detail.
The present invention provides a kind of air conditioner 100, adjusting cold medium fluxes.Fig. 1 is please referred to, is air-conditioning provided by the invention
The structural block diagram of device 100.The air conditioner 100 includes the first temperature sensor 120, second temperature sensor 130, third temperature biography
Sensor 140, control valve 110 and U-tube 150.Wherein, control valve 110 is connected to the entrance of U-tube 150, the first temperature sensing
Device 120, second temperature sensor 130, third temperature sensor 140 be respectively arranged at the inlet of U-tube 150, middle part and
Exit.
Referring to Fig. 2, being the circuit structure block diagram of air conditioner 100 provided by the invention.The air conditioner 100 further includes control
Device 160, controller 160 and control valve 110, the first temperature sensor 120, second temperature sensor 130 and third temperature pass
Sensor 140 is electrically connected.
Wherein, the first temperature sensor 120 is used to acquire the inlet temperature of U-tube 150；Second temperature sensor 130 is used
In the middle portion temperature of acquisition U-tube 150；Third temperature sensor 140 is used to acquire the outlet temperature of U-tube 150.
It should be noted that U-tube 150 provided by the invention can be U-shaped copper pipe, it is the heat exchanger of air conditioner 100.
The present invention also provides a kind of cold medium flux adjusting methods, are applied to above-mentioned air conditioner 100, for adjusting refrigerant stream
Amount, uniform heat exchange.Referring to Fig. 3, being the flow chart of cold medium flux adjusting method provided by the invention.The cold medium flux adjusting side
Method includes:
S301 obtains the inlet temperature of U-tube 150, middle portion temperature and goes out when air conditioner 100 enters refrigeration mode
Mouth temperature.
It is to be appreciated that inlet temperature, middle portion temperature and outlet temperature are respectively by the first temperature sensor 120, second
After temperature sensor 130, third temperature sensor 140 acquire, it is transmitted to controller 160.
S302 determines first temperature difference according to middle portion temperature and inlet temperature, and true with inlet temperature according to outlet temperature
Fixed second temperature difference.
Wherein, first temperature difference is the difference of middle portion temperature and inlet temperature, has reacted 150 entrance of U-tube to middle part
Cold medium flux.Second temperature difference is the difference of outlet temperature and inlet temperature, is referred to as the degree of superheat of U-tube 150, reflects
150 entrance of U-tube to exit cold medium flux.
S303 is based on first temperature difference and the second temperature difference adjusting control valve aperture.
Referring to Fig. 4, being the further flow chart of cold medium flux adjusting method provided by the invention.
S3031 judges first temperature difference whether in the first preset range, if it is, executing S3032；Otherwise, it holds again
Row S301.
When first temperature difference is in the first preset range, show that the middle portion temperature of U-tube 150 differs not with inlet temperature
Greatly namely there are refrigerants at the middle part of U-tube 150.
In a kind of optional embodiment, the first preset range is -1 DEG C~1 DEG C.
S3032 judges second temperature difference whether less than the first preset value, if it is, executing S3033；If it is not, then executing
S3034。
S3033 adjusts rule control control valve opening according to presetting first and reduces.
When second temperature difference is less than the first preset value, show that the heat exchange amount of U-tube 150 is not enough to that all refrigerants is allowed to reach out
With regard to evaporating completely when mouth, refrigerant is on the high side to cause outlet temperature lower, thus needs to control control valve opening and reduce to reduce refrigerant
Flow.
In a kind of optional embodiment, controller 160 controls the control valve with the first presetting regulations speed
Aperture reduces.At this point, control valve opening and the first regulations speed meet formula:
S=S0-k1*t
Wherein, S is control valve opening, S0For the current aperture of control valve 110, k1For the first regulations speed, t is the time.Example
Such as, the first regulations speed k1For 5 valve steps/second, S0For 15 valves step, then 1 second of second temperature difference less than the first preset value is being judged
Afterwards, control valve opening is 15-5*1=10 valve step.
It should be noted that the range of the first regulations speed is 2~10 valve steps/second.
S3034, judges whether second temperature difference is greater than the second preset value, if it is, executing S3035；If it is not, then executing
S3036。
S3035 adjusts rule control control valve opening according to presetting second and increases.
When second temperature difference is greater than the second preset value, show that the heat exchange amount of U-tube 150 exports refrigerant also not up to just
Evaporating completely, refrigerant is on the low side to cause outlet temperature higher, thus needs to control control valve opening and increase to increase refrigerant stream
Amount.
In a kind of optional embodiment, controller 160 controls the control valve with the second presetting regulations speed
Aperture increases.At this point, control valve opening and the second regulations speed meet formula:
S=S0+k2*t
Wherein, S is control valve opening, S0For the current aperture of control valve 110, k2For the second regulations speed, t is the time.Example
Such as, the second regulations speed k2For 5 valve steps/second, S0For 15 valves step, then 1 second of second temperature difference less than the first preset value is being judged
Afterwards, control valve opening is 15+5*1=20 valve step.
In a kind of optional embodiment, the first preset value is 1 DEG C, and the second preset value is 3 DEG C.
S3036 keeps control valve opening constant.
When second temperature difference is greater than or equal to the first preset value and is less than or equal to the second preset value, show U-tube at this time
Ability evaporating completely when 150 heat exchange amount makes refrigerant reach outlet just, the heat transfer rate of U-tube 150 is optimal at this time, heat transfer effect
Preferably, because without control valve opening is adjusted.
S3037, judges whether second temperature difference is greater than or equal to the first preset value and is less than or equal to the second preset value, if
It is then to execute S3039；If it is not, then executing S3038.
By adjusting control valve opening, so that second temperature difference is greater than or equal to the first preset value and is less than or equal to second in advance
If value, ability evaporating completely when the heat exchange amount of U-tube 150 makes refrigerant reach outlet just at this time, the at this time heat exchange of U-tube 150
Rate is optimal, and heat transfer effect is best, thus stops adjustment control valve opening.
S3038, judges whether regulating time is greater than or equal to presetting time threshold, if so, executing S3039；It is no
Then, S3033 or S3035 is re-executed.
Wherein, regulating time is the time that control control valve opening increases or reduces.
When regulating time is greater than or equal to presetting time threshold, stop adjustment control valve opening.Otherwise, if before
Be control control valve opening reduce, then re-execute S3033, continue control control valve opening reduce until second temperature difference be greater than or
Equal to the first preset value and it is less than or equal to the second preset value or regulating time more than or equal to until presetting time threshold；
If being that control control valve opening increases before, S3035 is re-executed, continues control control valve opening and increases until second temperature difference
More than or equal to the first preset value and it is less than or equal to the second preset value or regulating time more than or equal to presetting time threshold
Until value.
S3039 stops adjustment control valve opening.
It should be noted that S3037 and S3038, which can be exchanged, executes sequence, also it may be performed simultaneously, when second temperature difference
When more than or equal to the first preset value and being less than or equal to the second preset value, or when the regulating time obtained is greater than or equal in advance
When the time threshold of setting, it can stop adjustment control valve opening.
However, in some cases, relying solely on control control valve opening in actual application, can not reaching equal
The effect of even refrigerant.Therefore, for adjusting refrigerant more accurately and fast, achieve the effect that Homogeneouslly-radiating, the S303 further include:
When first temperature difference is in the first preset range, if second temperature difference is less than or equal to third preset value, according to pre-
First set adjusts rule control control valve opening and reduces, and controls rotation speed of fan raising and control the total liquid measure of refrigerant and subtract
It is few.Wherein, third preset value is less than the first preset value.
When second temperature difference is less than the first preset value, rule control will be adjusted according to presetting first and control valve opening
Reduce, however, it is determined that second temperature difference is also further less than third preset value, shows that the degree of superheat is too small at this time namely refrigerant is too many, only
Refrigerant only can not be reduced rapidly by control control valve opening reduction, it is therefore desirable to adjust rule according to presetting first
On the basis of control control valve opening reduces, while rotation speed of fan raising is controlled, increases the heat exchange amount of U-tube 150, in order to evaporate
More refrigerants；And control the total liquid measure of refrigerant and reduce, the effect for reducing refrigerant can be rapidly achieved.
In a kind of optional embodiment, third preset value is -3 DEG C.
When first temperature difference is in the first preset range, if second temperature difference is greater than or equal to the 4th preset value, according to pre-
Second adjusting rule control control valve opening of setting increases, and controls rotation speed of fan reduction and the total liquid measure increasing of control refrigerant
Add, wherein the 4th preset value is greater than the second preset value.
When second temperature difference is greater than the second preset value, rule control will be adjusted according to presetting second and control valve opening
Increase, however, it is determined that second temperature difference is also further greater than the 4th preset value, shows that the degree of superheat is too high at this time namely refrigerant is very little, only
The refrigerant that can not increase sharply only is increased by control control valve opening, it is therefore desirable to adjust rule according to presetting second
On the basis of control control valve opening increases, while rotation speed of fan reduction is controlled, the heat exchange amount of U-tube 150 is reduced, to reduce
The refrigerant of evaporation；And control the total liquid measure of refrigerant and increase, the effect for increasing refrigerant can be rapidly achieved.
In a kind of optional embodiment, the 4th preset value is 5 DEG C.
In summary content can obtain: when first temperature difference is in the first preset range, if second temperature difference is less than or equal to the
Three preset values, then can according to presetting first adjust rule control control valve opening reduce, and control rotation speed of fan increase with
And the total liquid measure of control refrigerant is reduced.If second temperature difference is greater than third preset value and less than the first preset value, only in accordance with default
Fixed first adjusts rule control control valve opening and reduces.If second temperature difference is greater than or equal to the first preset value and is less than or equal to
Second preset value then keeps control valve opening constant.If second temperature difference is greater than the second preset value and less than the 4th threshold value, only
Rule control control valve opening is adjusted according to presetting second to increase.If second temperature difference is greater than or equal to the 4th threshold value, press
While adjusting rule control control valve opening increase according to presetting second, control rotation speed of fan is reduced and control refrigerant is total
Liquid measure increases.
In order to execute the corresponding steps in above-described embodiment and each possible mode, a kind of cold medium flux tune is given below
The implementation of regulating device 200, optionally, the cold medium flux regulating device 200 can use above-mentioned controller shown in FIG. 1
160 device architecture.Further, referring to Fig. 5, Fig. 5 is the function mould of cold medium flux regulating device 200 provided by the invention
Block figure.It should be noted that the technology of cold medium flux regulating device 200 provided by the present embodiment, basic principle and generation
Effect is identical with above-described embodiment, and to briefly describe, the present embodiment part does not refer to place, can refer to phase in the above embodiments
Answer content.The cold medium flux regulating device 200 includes: parameter acquisition module 210, computing module 220 and control module 230.
Wherein, parameter acquisition module 210 is used to obtain the entrance of U-tube 150 when air conditioner 100 enters refrigeration mode
Temperature, middle portion temperature and outlet temperature.
It is to be appreciated that parameter acquisition module 210 can be used for executing S301 in a kind of optional embodiment.
Computing module 220 is used to determine first temperature difference according to middle portion temperature and inlet temperature, and according to outlet temperature with
Inlet temperature determines second temperature difference.
Wherein, first temperature difference is the difference of middle portion temperature and inlet temperature, and second temperature difference is outlet temperature and inlet temperature
Difference.
It is to be appreciated that computing module 220 can be used for executing S302 in a kind of optional embodiment.
Control module 230 is used to be based on first temperature difference and the second temperature difference adjusting control valve aperture.
Specifically, control module 230 is used for when first temperature difference is in the first preset range, if second temperature difference is less than or waits
In third preset value, then rule control control valve opening can be adjusted according to presetting first and is reduced, and controls rotation speed of fan liter
The high and total liquid measure of control refrigerant is reduced.If second temperature difference is greater than third preset value and less than the first preset value, only in accordance with
Presetting first adjusts rule control control valve opening and reduces.If second temperature difference be greater than or equal to the first preset value and be less than or
Equal to the second preset value, then keep control valve opening constant.If second temperature difference is greater than the second preset value and less than the 4th threshold value,
Rule control control valve opening is adjusted only in accordance with presetting second to increase.If second temperature difference is greater than or equal to the 4th threshold value,
While then adjusting rule control control valve opening increase according to presetting second, control rotation speed of fan is reduced and is controlled cold
The total liquid measure of matchmaker increases.
It is to be appreciated that in a kind of optional embodiment, control module 230 can be used for executing S303, S3031~
S3039。
Optionally, cold medium flux regulating device 200 includes that at least one can be stored in control in the form of software or firmware
Software function module in device 160, for example, can be with direct burning in the memory space of controller 160, in another embodiment party
In formula, it may be stored in other independent storage mediums, executed by controller 160.
In conclusion cold medium flux adjusting method, device and air conditioner provided by the invention, by obtaining entering for U-tube
Mouthful temperature, middle portion temperature and outlet temperature, and calculate first temperature difference and second temperature difference, due to first temperature difference be middle portion temperature with
The temperature difference that inlet temperature is formed, has reacted the cold medium flux of U-tube entrance to middle part；Second temperature difference is outlet temperature and entrance
The temperature difference that temperature is formed, second temperature difference is the cold medium flux that the degree of superheat reflects U-tube entrance to exit.Thus by the
One temperature difference, second temperature difference determine cold medium flux, and as benchmark adjusting control valve aperture to realize adjusting cold medium flux, can
Uniform cold medium flux improves heat exchanger utilization rate, promotes user experience.
Although present disclosure is as above, present invention is not limited to this.Anyone skilled in the art are not departing from this
It in the spirit and scope of invention, can make various changes or modifications, therefore protection scope of the present invention should be with claim institute
Subject to the range of restriction.
Claims (10)
1. a kind of cold medium flux adjusting method, which is characterized in that the described method includes:
When air conditioner (100) enter refrigeration mode, inlet temperature, middle portion temperature and the outlet temperature of U-tube (150) are obtained
Degree；
First temperature difference is determined according to the middle portion temperature and the inlet temperature, and according to the outlet temperature and the entrance
Temperature determines second temperature difference；
Based on first temperature difference and second temperature difference adjusting control valve aperture.
2. cold medium flux adjusting method according to claim 1, which is characterized in that described to be based on first temperature difference and institute
The step of stating the second temperature difference adjusting control valve aperture include:
When first temperature difference is in the first preset range, if second temperature difference less than the first preset value, according to default
Fixed first adjusts control valve opening described in rule control and reduces；
If second temperature difference is greater than the second preset value, valve opening is controlled according to described in the second presetting adjusting rule control
Increase；
If second temperature difference is greater than or equal to first preset value and is less than or equal to second preset value, institute is kept
It is constant to state control valve opening；Wherein, first preset value is less than second preset value.
3. cold medium flux adjusting method according to claim 2, which is characterized in that the method also includes:
When first temperature difference is in the first preset range, if second temperature difference is less than or equal to third preset value, press
Control valve opening described in rule control is adjusted according to presetting first to reduce, and controls that rotation speed of fan increases and control refrigerant is total
Liquid measure is reduced, wherein the third preset value is less than first preset value.
4. cold medium flux adjusting method according to claim 2, which is characterized in that the method also includes:
When first temperature difference is in the first preset range, if second temperature difference is greater than or equal to the 4th preset value, press
Control valve opening described in rule control is adjusted according to presetting second to increase, and controls that rotation speed of fan reduces and control refrigerant is total
Liquid measure increases, wherein the 4th preset value is greater than second preset value.
5. the cold medium flux adjusting method according to any one of claim 2-4, which is characterized in that described according to default
Controlling the step of valve opening reduces described in the first fixed adjusting rule control includes:
The control valve opening is controlled with the first presetting regulations speed to reduce.
6. according to the cold medium flux adjusting method any one in claim 2-4, which is characterized in that described according to presetting
Second adjusting rule control described in control valve opening increase the step of include:
The control valve opening is controlled with the second presetting regulations speed to increase.
7. the cold medium flux adjusting method according to any one of claim 2-4, which is characterized in that described according to pre-
The step of control valve opening described in first adjusting rule control of setting reduces is described according to the second presetting adjusting rule
After controlling the step of control valve opening increases, the method also includes:
When second temperature difference is greater than or equal to first preset value and is less than or equal to second preset value, stop adjusting
The whole control valve opening.
8. the cold medium flux adjusting method according to any one of claim 2-4, which is characterized in that described according to pre-
The step of control valve opening described in first adjusting rule control of setting reduces is described according to the second presetting adjusting rule
After controlling the step of control valve opening increases, the method also includes:
When the regulating time of acquisition is greater than or equal to presetting time threshold, stop adjusting the control valve opening, wherein
The regulating time is the time that the control control valve opening increases or reduces.
9. a kind of cold medium flux regulating device, which is characterized in that described device includes:
Parameter acquisition module (210), for obtaining the entrance temperature of U-tube (150) when air conditioner (100) enter refrigeration mode
Degree, middle portion temperature and outlet temperature；
Computing module (220), for determining first temperature difference according to the middle portion temperature and the inlet temperature, and according to described
Outlet temperature and the inlet temperature determine second temperature difference；
Control module (230), for being based on first temperature difference and second temperature difference adjusting control valve aperture.
10. a kind of air conditioner, which is characterized in that including controller (160), the first temperature sensor (120), second temperature sensing
Device (130), third temperature sensor (140) and U-tube (150), first temperature sensor (120), second temperature
Degree sensor (130), the third temperature sensor (140) be respectively arranged at the inlet of the U-tube (150), middle part with
And exit, the controller (160) and the first temperature sensor (120), the second temperature sensor (130) and described
Third temperature sensor (140) is electrically connected；
First temperature sensor (120), the second temperature sensor (130), the third temperature sensor (140) point
Inlet temperature, middle portion temperature and the outlet temperature of the U-tube (150) Yong Yu not acquired, and respectively by the inlet temperature,
Middle portion temperature and outlet temperature are transmitted to the controller (160)；
The controller (160) is used to determine first temperature difference according to the middle portion temperature and the inlet temperature, and according to institute
It states outlet temperature and the inlet temperature determines second temperature difference；
The controller (160) is also used to based on first temperature difference and second temperature difference adjusting control valve aperture.
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