CN104236027A - Air-conditioning apparatus - Google Patents
Air-conditioning apparatus Download PDFInfo
- Publication number
- CN104236027A CN104236027A CN201410236215.3A CN201410236215A CN104236027A CN 104236027 A CN104236027 A CN 104236027A CN 201410236215 A CN201410236215 A CN 201410236215A CN 104236027 A CN104236027 A CN 104236027A
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- Prior art keywords
- temperature
- air
- indoor
- indoor fan
- threshold value
- Prior art date
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- Granted
Links
- 238000004378 air conditioning Methods 0.000 title abstract description 5
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 36
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 238000004781 supercooling Methods 0.000 claims description 15
- 239000003507 refrigerant Substances 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000003570 air Substances 0.000 description 175
- 238000005057 refrigeration Methods 0.000 description 5
- 230000005494 condensation Effects 0.000 description 4
- 238000009833 condensation Methods 0.000 description 4
- 238000005034 decoration Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000012080 ambient air Substances 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000007791 dehumidification Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0043—Indoor units, e.g. fan coil units characterised by mounting arrangements
- F24F1/0047—Indoor units, e.g. fan coil units characterised by mounting arrangements mounted in the ceiling or at the ceiling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0059—Indoor units, e.g. fan coil units characterised by 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
- 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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/46—Improving electric energy efficiency or saving
-
- 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
-
- 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
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/76—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by means responsive to temperature, e.g. bimetal springs
-
- 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
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
-
- 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
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
-
- 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
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/20—Humidity
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Landscapes
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- Signal Processing (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Atmospheric Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
According to a controller (30) of an air-conditioning apparatus (100), if an air temperature difference delta T between the air temperature Tin and a set temperature Tset is greater than a threshold value T1, the controller determines the number of revolutions per minute Nf for an indoor fan (7). If the air temperature difference delta T exceeds a fan threshold value T2, a heat exchanger temperature Te exceeds a cool warm threshold value T3, and an air humidity Hin is lower than a dry-wet threshold value H1, the controller stops the indoor fan. After the indoor fan has been stopped, if a cooling temperature delta Tedp, which is a difference between the heat exchanger temperature Te and a dew-point temperature Tdp, is lower than a cooling threshold T4, or if a re-rotation period has elapsed since the stop of the indoor fan, the controller rotates the indoor fan (7) again.
Description
Technical field
The present invention relates to air conditioner, particularly possess the air conditioner of dehumidification function.
Background technology
As the existing air conditioner possessing dehumidification function, disclose the operation controller of following air conditioner, this air conditioner has: the compressor of volume-variable, heat source side heat exchanger (being equivalent to outdoor heat converter), expansion mechanism, possess air quantity variable utilize crosswind fan (being equivalent to indoor fan) utilize side heat exchanger (being equivalent to indoor heat converter), control device is first in room temperature control loop, control compressor frequency to make indoor intake air temperature close to design temperature, after indoor intake air temperature is close to design temperature, switch to humidity control loop, the frequency of compressor is increased, make the revolutions per minute of indoor blower reduce (minimizing air quantity) simultaneously, reduce sensible capacity (reduction refrigeration load), guarantee latent heat ability, realization prevented cold (such as, with reference to patent document 1.)。
Prior art document
Patent document
Patent document 1: Japanese Patent No. 2909955 publication (5-6 page, Fig. 6)
Summary of the invention
The problem that invention will solve
But, in the operation controller of the air conditioner recorded at patent document 1, switch to humidity control loop when indoor intake air temperature reaches design temperature and reduce the air quantity of indoor blower.Like this, because of the minimizing of air quantity, blow out air temperature reduces, and therefore when the humidity of the surrounding of blow-off outlet is high time, easily produces condensation at blow-off outlet, there is dew and falls problem in air-conditioning object space.
And when indoor intake air temperature is low, the temperature that there is indoor heat converter is too low and reach the danger of less than 0 DEG C, there is the condensed water being attached to indoor heat converter and freezes and make the danger of indoor heat converter breakage.
The present invention, just in order to solve the above problems, its object is to provide a kind of air conditioner, its suppressed cold while, the condensation realizing blow-off outlet prevent with indoor heat converter freeze prevent.
For solving the scheme of problem
The feature of the air conditioner that the present invention relates to is to have: off-premises station, is provided with compressed refrigerant and can changes the outdoor heat converter carrying out heat exchange between the compressor of compressor frequency and outdoor air and the expansion valve that cold-producing medium is expanded, and indoor set, disposed in the interior, and be provided with the indoor heat converter carrying out heat exchange between room air, towards the indoor fan of indoor heat converter supply room air, detect the indoor inhaled air temperature sensor from the temperature of the suction room air of indoor, detect the indoor suction air humidity sensor from the humidity of the suction room air of indoor, detect the heat-exchanger temperature sensor of the temperature of described indoor heat converter, and at least control the control device of described compressor and described indoor fan, described control device the difference of the air themperature Tin that described indoor inhaled air temperature sensor detects and the temperature preset and design temperature Tset and difference in air temperature Δ T larger than the temperature instant heating threshold value T1 preset time, the relation of the heat exchanger temperature Te that the air humidity Hin detected according to described indoor suction air humidity sensor and described heat-exchanger temperature sensor detect decides revolutions per minute Nf, carry out the cooling operation described indoor fan being rotated according to the revolutions per minute Nf of this decision, in described cooling operation, when described difference in air temperature Δ T exceedes the temperature preset than described hot threshold value T1 low temperature and fan threshold value T2, the temperature that described heat-exchanger temperature sensor detects and heat exchanger temperature Te exceed the temperature and changes in temperature threshold value T3 that preset, and described air humidity Hin be less than the humidity that presets namely dry wet threshold value H1 time, described indoor fan is stopped, and after making described indoor fan stop, using heat exchanger temperature Te with suck the difference of dew-point temperature Tdp of room air as supercooling temperature Δ Tedp, when this supercooling temperature Δ Tedp is less than the temperature and supercooling threshold value T4 that preset, or have passed through when stopping from described indoor fan time of presetting namely again rotational time, described indoor fan is rotated again.
Invention effect
According to the present invention, control device determines revolutions per minute Nf according to the relation of air humidity Hin and heat exchanger temperature Te, with the revolutions per minute Nf of this decision, described indoor fan is rotated and carry out cooling operation, fan threshold value T2 is exceeded at difference in air temperature Δ T, heat exchanger temperature Te exceed changes in temperature threshold value T3 and air humidity Hin is less than dry wet threshold value H1 time, indoor fan is stopped, and after making described indoor fan stop, when supercooling temperature Δ Tedp is less than supercooling threshold value T4, or when have passed through again rotational time when stopping from described indoor fan, indoor fan is rotated again.
Therefore, it is possible to suppression supercooling, and the condensation that can realize the periphery of blow-off outlet prevent with indoor heat converter freeze prevent.
Accompanying drawing explanation
Fig. 1 illustrates the air conditioner that embodiments of the present invention 1 relate to, and is the refrigerant loop figure of the structure schematically showing refrigerant loop.
Fig. 2 is the side view cutaway drawing of the part (indoor set) that the air conditioner that embodiments of the present invention 1 relate to is shown.
Fig. 3 illustrates the air conditioner that embodiments of the present invention 1 relate to, and is the block diagram of the structure that a part (control device) is shown.
Fig. 4 is the flow chart that the control flow that the air conditioner that embodiments of the present invention 1 relate to is described is shown.
Fig. 5 is the flow chart that the control flow that the air conditioner that embodiments of the present invention 1 relate to is described is shown.
Fig. 6 illustrates the air conditioner that embodiments of the present invention 1 relate to, and is the form of the value that the compressor frequency determined according to difference in air temperature is shown.
Fig. 7 illustrates the air conditioner that embodiments of the present invention 1 relate to, and is the form of the value (index) of the revolutions per minute that the indoor fan determined according to air humidity and heat exchanger temperature is shown.
Fig. 8 illustrates the air conditioner that embodiments of the present invention 1 relate to, and is to illustrate according to relative humidity and the form sucking the dew-point temperature that dry-bulb temperature determines.
Fig. 9 is the side view cutaway drawing that the part (indoor set) that the air conditioner that embodiments of the present invention 2 relate to is described is shown.
Detailed description of the invention
[embodiment 1]
Fig. 1 ~ Fig. 3 illustrates the air conditioner that embodiments of the present invention 1 relate to, Fig. 1 is the refrigerant loop figure of the structure schematically showing refrigerant loop, Fig. 2 is the side view cutaway drawing that a part (indoor set) is shown, Fig. 3 is the block diagram of the structure that a part (control device) is shown.In addition, each figure is schematic, and the present invention is not limited to illustrated form.
(refrigerant loop)
In FIG, air conditioner 100 has the off-premises station 10 and indoor set 20 that connect each other by refrigerant piping.
Be provided with at off-premises station 10: compressor 1, its compressed refrigerant and operating frequency (hereinafter referred to as " compressor frequency ") can be changed; Cross valve 2, it is for changing the flow direction of cold-producing medium; Outdoor heat converter 3, carries out heat exchange between itself and outdoor air; Outdoor fan 4, it is towards outdoor heat converter 3 supply chamber outer air; And expansion valve 5, it makes cold-producing medium expand.On the other hand, be provided with at indoor set 20: indoor heat converter 6, between itself and room air, carry out heat exchanger; And indoor fan 7, it supplies room air towards indoor heat converter 6.
And, when to indoor refrigeration, form the cold-producing medium of discharging from compressor 1 and flow through cross valve 2, outdoor heat converter 3, expansion valve 5, indoor heat converter 6 again get back to the refrigerant loop of compressor 1 through cross valve 2 successively, perform kind of refrigeration cycle.
On the other hand, when to indoor heating, form the cold-producing medium of discharging from compressor 1 and flow through cross valve 2, indoor heat converter 6, expansion valve 5, outdoor heat converter 3 again get back to the refrigerant loop of compressor 1 through cross valve 2 successively, perform kind of refrigeration cycle.
(indoor set)
In fig. 2, indoor set 20 is placed in " the roof baried type " in the arrangement recess 92 of the roof 91 being formed at indoor 90, it possesses the framework 21 of the rectangle of lower surface 22 opening, the central authorities of the end face 23 of framework 21 are provided with indoor fan motor 7a, be fixed with indoor fan blade 7b at indoor fan motor 7a, indoor fan motor 7a and indoor fan blade 7b forms indoor fan 7.
Further, indoor heat converter 6 is configured to embracing chamber internal fan blade 7b.Now, indoor heat converter 6 is divided into 4 parts, and described part configures abreast with the side 24 (4 face) of framework 21 separately, and forms wind path 25 (4 place) between side 24.
Therefore, by indoor fan 7, make the room air that aspirates from the lower surface 22 of opening after by indoor heat converter 6, via wind path 25, from the environs of the side 24 of the lower surface 22 of opening to indoor 90 blowouts.
In addition, the decoration panel 26 of rectangular plate-like is detachably provided with at the lower surface 22 of opening, along the lateral margin of decoration panel 26, form blow-off outlet 29 in the position corresponding with wind path 25, and form suction inlet 27 with the form of being surrounded by blow-off outlet 29 in central range.And, be configured with the cover 28 of horn-like (leading a cow flower-shaped) that guides to indoor fan blade 7b of indoor air efficient ground between suction inlet 27 and indoor fan blade 7b.
(sensor)
Further, be provided with at cover 28: indoor inhaled air temperature sensor (hereinafter referred to as " air temperature sensor ") 31, it detects the temperature of the room air sucked; And indoor suction air humidity sensor (hereinafter referred to as " air humidity sensor ") 32, it detects the humidity of the room air sucked.The indoor heat converter temperature sensor (hereinafter referred to as " heat-exchanger temperature sensor ") 33 of the temperature of sensing chamber's inside heat exchanger 6 is provided with at indoor heat converter 6.
Further, the testing result based on air temperature sensor 31, air humidity sensor 32 and heat-exchanger temperature sensor 33 is come in control device 30 machine 20 disposed in the interior of the revolutions per minute of control room internal fan 7 and the speed of compressor 1.
In addition, as long as the setting of air temperature sensor 31 and air humidity sensor 32 can detect the position of the temperature and humidity of the room air of suction, arbitrary position can be arranged on.
And control device 30 also can machine 10 disposed in the outdoor.
(control device)
Control device 30 is based on air temperature sensor 31, air humidity sensor 32, and the testing result of heat-exchanger temperature sensor 33 carrys out the revolutions per minute Nf of control room the internal fan 7 and compressor frequency Hz of compressor 1, it has component (the computing component of difference in air temperature Δ T for performing each step shown in following control flow, the comparison means of difference in air temperature Δ T and hot threshold value T1, the decision component of compressor frequency Hz, instruction component compressor 1 being rotated or stops, the decision component of the revolutions per minute Nf of indoor fan 7, the comparison means of difference in air temperature Δ T and fan threshold value T2, air humidity Hin and the comparison means doing wet threshold value H1, the computing component of supercooling temperature Δ Tedp, the comparison means of supercooling temperature Δ Tedp and supercooling threshold value T4, the comparison means of the dwell time of indoor fan 7 and rotational time again, the comparison means of difference in air temperature Δ T and dry heat threshold value T5).
(control flow)
Fig. 4 and Fig. 5 is the flow chart that the control flow that the air conditioner that embodiments of the present invention 1 relate to is described is shown.
Use Fig. 4 and Fig. 5, the control flow (action) when carrying out cooling operation (supply cold energy to indoor heat converter 6 and to come in cooling chamber 90) to air conditioner 100 is described.
When connecting (ON) power supply to air conditioner 100 (S1), start air temperature sensor 31 respectively to the detection of indoor intake air temperature (hereinafter referred to as " air themperature ") Tin, air humidity sensor 32 to the detection (S2) of the temperature (hereinafter referred to as " heat exchanger temperature Te ") of the detection of indoor suction relative humidity (hereinafter referred to as " air humidity ") Hin and heat-exchanger temperature sensor 33 pairs of indoor heat converters 6.
(heat is stopped (Thermo-OFF))
Then, try to achieve the difference in air temperature Δ T (S3) of temperature (hereinafter referred to as " the design temperature ") Tset of air themperature Tin and setting, the relatively size (S4) of difference in air temperature Δ T and the hot threshold value T1 (such as, 1.5 DEG C) preset.
Then, difference in air temperature Δ T at hot below threshold value T1 time, namely, when air themperature Tin arrive design temperature Tset and without the need to regulating the blowout of air, compressor 1 is kept to stop (OFF) (S5), as long as do not pressed the stop button (S6) of instruction running stopping by not shown remote controller etc., then get back to the step (S2) detecting air themperature Tin, air humidity Hin and heat exchanger temperature Te, and perform step thereafter.On the other hand, when stop button is pressed, stop the running (end) of air conditioner 100.In addition, will compressor 1 be made to stop the situation of (OFF) to be called " heat is stopped ".
(heat opens (Thermo-ON))
On the other hand, when difference in air temperature Δ T exceedes hot threshold value T1, namely, when air themperature Tin does not arrive design temperature Tset, determine the frequency (hereinafter referred to as " compressor frequency Hz ") (S7) of the electric power driving compressor 1 according to the size of difference in air temperature Δ T, make compressor 1 rotate (ON) (S8) with the compressor frequency Hz of this decision.In addition, the situation making compressor 1 start (ON) is called " heat is opened ".
Namely, when making compressor 1 start (ON), implement the VFC controlling compressor frequency Hz, when difference in air temperature Δ T is large, increase compressor frequency Hz and improve air conditioning capacity, on the contrary, when difference in air temperature Δ T is little, reduces compressor frequency Hz and reduce air conditioning capacity (with reference to Fig. 6).
(humidity judges: the situation of high humility)
Then, judge whether air humidity Hin exceedes high humility (such as, 78%) (S9).
Then, when being judged to be high humility, the revolutions per minute Nf of indoor fan 7 is determined, for the relation according to air humidity Hin and heat exchanger temperature Te and predetermined revolutions per minute Nf (with reference to Fig. 7) (S10), make indoor fan motor 7a rotate (S11) with the revolutions per minute Nf of this decision.Then, as long as do not pressed the stop button (S12) of instruction running stopping by not shown remote controller etc., then get back to the step (S2) detecting air themperature Tin, air humidity Hin and heat exchanger temperature Te, and perform step thereafter.On the other hand, when stop button is pressed, stop the running (end) of air conditioner 100.
(humidity judges: the situation of low humidity)
On the other hand, when being judged to be low humidity, the revolutions per minute Nf of indoor fan 7 is determined, for the relation according to air humidity Hin and heat exchanger temperature Te and predetermined revolutions per minute Nf (with reference to Fig. 7) (S13), make indoor fan motor 7a rotate (S14) with the revolutions per minute Nf of this decision.
Then, detect air themperature Tin, air humidity Hin and heat exchanger temperature Te (S15), try to achieve difference in air temperature Δ T (Δ T=Tin-Tset) (S16).
(stopping of indoor fan)
Next, the fan threshold value T2 that presets is exceeded (such as at difference in air temperature Δ T, 1.0 DEG C) (Δ T>1.0 DEG C), heat exchanger temperature Te exceed the changes in temperature threshold value T3 that presets (such as, 1.0 DEG C) and warmer (such as, Te>8 DEG C) and air humidity Hin is less than the dry wet threshold value H1 that presets (such as, 68%) and drier (such as, Hin<68%), when (S17), indoor fan 7 is stopped (S18).
On the other hand, when not meeting above-mentioned condition (" Δ T>T2 " and " Te>T3 " and " Hin<H1 "), continue the rotation of indoor fan 7, get back to the step (S13) detecting air themperature Tin, air humidity Hin and heat exchanger temperature Te, perform step thereafter.
(rotating again of indoor fan)
And, after making indoor fan 7 stop (S18), detect air themperature Tin, air humidity (Hin) and heat exchanger temperature Te (S19), the dew-point temperature Tdp of room air that computing sucks and difference (hereinafter referred to as " supercooling temperature ") the Δ Tedp (Δ Tedp=Te-Tdp) (S20) of heat exchanger temperature Te and dew-point temperature Tdp.In addition, dew-point temperature Tdp can be calculated by the approximate expression obtained by air line chart, also can be that the form (arranging relative to air themperature (dry-bulb temperature) Tin and air humidity (relative humidity) Hin) such as according to Fig. 8 judges.
Then, the supercooling threshold value T4 that presets is less than (such as at supercooling temperature Tedp,-3.0 DEG C) or indoor the stopping (S18) of fan 7 rise and have passed through the rotational time again that presets (such as, 30 seconds) when (S21), for the object freezed preventing indoor heat converter 6, indoor fan 7 is made to rotate (S22) once again.
Then, detect air themperature Tin (S23), try to achieve difference in air temperature Δ T (S24), compare difference in air temperature Δ T and the size (S25) of dry heat threshold value T5 (such as ,-0.5 DEG C) preset.
Then, difference in air temperature Δ T at below dry heat threshold value T5 time, that is, when air themperature Tin is than design temperature Tset low temperature, make compressor 1 stop (OFF) (S26).Then, as long as do not press stop button, then get back to the step (S2) detecting air themperature Tin, air humidity Hin and heat exchanger temperature Te, and perform step thereafter.
On the other hand, when difference in air temperature Δ T exceedes dry heat threshold value T5, namely, when air themperature Tin reach design temperature Tset or slightly lower than design temperature Tset time, get back to and the revolutions per minute Nf of indoor fan 7 determined, for the relation according to air humidity Hin and heat exchanger temperature Te and the step (S13) of revolutions per minute Nf (with reference to Fig. 6) that predetermines, perform step thereafter.
(compressor frequency)
Fig. 6 ~ Fig. 8 illustrates the air conditioner that embodiments of the present invention 1 relate to, Fig. 6 is the form of the value that the compressor frequency determined according to difference in air temperature is shown, Fig. 7 is the form of the value (index) of the revolutions per minute Nf that the indoor fan determined according to air humidity and heat exchanger temperature is shown, Fig. 8 illustrates according to relative humidity and the form sucking the dew-point temperature that dry-bulb temperature determines.
In figure 6, T is larger for difference in air temperature Δ, then revolutions per minute Nf is larger, promotes the refrigeration of room air.Further, when difference in air temperature Δ T reaches dry heat threshold value T5 (such as ,-0.5 DEG C), compressor 1 is stopped.
(revolutions per minute)
In the figure 7, be lowest temperature by heat exchanger temperature Te, air humidity Hin when being most high humility, the revolutions per minute Nf of indoor fan 7 is set to " 100 ", heat exchanger temperature Te is divided into 4 grades, and air humidity Hin being divided into 5 grades, the revolutions per minute Nf of the indoor fan 7 under each being divided is with the exponential representation relative to described " 100 ".
Namely, be judged to be the situation (78%<Hin) of high humility, compared with the situation (Hin≤78%) being judged to be low humidity, the revolutions per minute Nf of indoor fan 7 increases, air humidity Hin is higher, then indoor fan 7 general stages ground speedup.And under same air humidity Hin, heat exchanger temperature Te is lower, then the revolutions per minute Nf of indoor fan 7 is larger.
At this, the relation that the dry wet threshold value H1 of air humidity Hin grasps by test do not condense such humidity and air quantity makes form (Fig. 6).And, the threshold value of heat exchanger temperature Te is with following direction setting, " 4 DEG C " that will have a surplus relative to " 0 DEG C " in lower limit side freeze to prevent indoor heat converter 6 as lower limit, and in order to guarantee that latent heat ability makes the temperature of indoor heat converter 6 reduce as much as possible.
(dew-point temperature)
Fig. 8 replaces formula and the value of the dew-point temperature determined according to relative velocity and suction dry-bulb temperature is illustrated with form, relative humidity (relative to air humidity Hin) higher (high humidity), suction dry-bulb temperature (being equivalent to air themperature Tin) higher (high temperature), then the value of dew-point temperature (Tdp) is higher.
(action effect)
Air conditioner 100 at satisfied " T>1.0 DEG C " and " Te>8 DEG C " and " Hin<68% " indoor fan 7 is stopped (S18).This means at low humidity and do not exist the worry freezed of indoor heat converter 6, difference in air temperature Δ T (difference of air themperature Tin and design temperature Tset) little, dehumidify to reduce sensible capacity further, continue the running of compressor 1, make indoor fan 7 stop simultaneously, thus heat exchanger temperature Te is declined further.That is, when indoor fan 7 stops, at indoor heat converter 6, and suck between air and there is no heat exchange, therefore cannot dehumidify, but due to when indoor fan 7 operates heat exchanger temperature Te have dropped, even therefore less air quantity also can guarantee latent heat ability.
And, the indoor fan 7 temporarily stopped is made again to rotate the words of (S22), ensure that heat exchanger temperature Te less than dew-point temperature Tdp (more low temperature), even thus room conditioning load hour also can guarantee latent heat ability, and pass through also setting-up time condition, even if when contingency heat-exchanger temperature sensor 33 fault, also can prevent indoor heat converter 6 from freezing.
As mentioned above, air conditioner 100 detects air themperature Tin, air humidity Hin and heat exchanger temperature Te, the revolutions per minute of compressor frequency and indoor fan 7 is controlled based on this, therefore, even also latent heat ability can be guaranteed in indoor load hour, and trying to achieve dew-point temperature Tdp, by comparing with heat exchanger temperature Te dew-point temperature Tdp, indoor fan 7 being rotated again, therefore, it is possible to realize condensation prevent with heat exchanger freeze prevent.
[embodiment 2]
Fig. 9 is the side view cutaway drawing that the part (indoor set) that the air conditioner that embodiments of the present invention 2 relate to is described is shown.In addition, identical label is marked with to the part identical with embodiment 1 or suitable part, clipped explanation.And Fig. 9 is schematic, the present invention is not limited to illustrated form.
In fig .9, the indoor set 220 of air conditioner 200, the decoration panel 26 of the indoor set 20 in embodiment 1 possesses the surface temperature sensor 34 of the temperature of the ground surface (not shown) of in sensing chamber 90.
(surface temperature sensor)
Surface temperature sensor 34 detects the infrared ray sent from ground surface, detect the thermocouple type sensor of the temperature (hereinafter referred to as " surface temperature Tf ") of ground surface non-contactly, but the present invention is not limited to this form and shape etc.
(sendible temperature)
In addition, for the sendible temperature that human feeling arrives, except ambient air temperature, be also subject to the considerable influence of the radiation temperature that the humidity of air, ground surface and even metope obtain.Therefore, for air conditioner 200, relative to the situation that the control device 30 of air conditioner (embodiment 1) 100 controls based on air themperature Tin etc., the control device 30 of air conditioner (embodiment 2) 200 replaces air themperature Tin and uses sendible temperature Ta.
That is, sendible temperature Ta is tried to achieve by air themperature Tin, air humidity Hin, the function of surface temperature Tf and formula " Ta=Tin+ α × (Hin-60)+β × (Tf-Tin) ".
Now, α is the correction factor (dimension is [DEG C/%]) when considering air humidity Hin, β is correction factor when considering air themperature Tin and surface temperature Tf, according to test substitute into for comfort index consider 0 to 1 value (0< α <1.0,0< β <1.0).
Such as, if α be 0.003 [DEG C/%], β is 0.25, uses concrete numbers illustrated effect.When Tin=26 DEG C, Hin=50%, Tf=25 DEG C time, Ta=25.45 DEG C.This adds to revise to make to experience the sendible temperature Ta result lower than ambient air temperature Tin with the situation that, radiation temperature low at air humidity Hin (surface temperature Tf) are low.That is, in this case, by using sendible temperature Ta, difference in air temperature Δ T than when using air themperature Tin little ((Ta-Tset) < (Tin-Tset)).
Therefore, used by the air themperature Tin that corrected sendible temperature Ta like this is replaced in air conditioner 100, as mentioned above, the compressor frequency Hz of compressor 1 is controlled in lower temperature, the duration of runs of compressor 1 can be shortened, and compressor frequency can be reduced, therefore, it is possible to carry out energy-saving operation.
On the contrary, if α is 0.003, [DEG C/%], β are 0.25, when Tin=26 DEG C, Hin=70%, Tf=27 DEG C time, sendible temperature Ta is 26.55 DEG C.That is, in this case, by using sendible temperature Ta, difference in air temperature Δ T than when using air themperature Tin large ((Ta-Tset) > (Tin-Tset)).
Therefore, because air humidity Hin is high, surface temperature Tf is also high, so more feel bad relative to the air themperature Tin of reality, therefore sendible temperature Ta is modified to higher than air themperature Tin.By controlling based on this sendible temperature Ta, more comfortable running can be carried out.
(control device)
The control device 30 of air conditioner 200 and the control device 30 (with reference to Fig. 3) of air conditioner 100 upper connect surface temperature sensor 34 and possess the computing component of sendible temperature Ta, air themperature Tin is identical to the structure of the displacement members of sendible temperature Ta, therefore omits diagram.
Label declaration
1: compressor; 2: cross valve; 3: outdoor heat converter; 4: outdoor fan; 5: expansion valve; 6: indoor heat converter; 7: indoor fan; 7a: indoor fan motor; 7b: indoor fan blade; 10: off-premises station; 20: indoor set; 21: framework; 22: lower surface; 23: end face; 24: side; 25: wind path; 26: decoration panel; 27: suction inlet; 28: cover; 29: blow-off outlet; 30: control device; 31: air temperature sensor; 32: air humidity sensor; 33: heat-exchanger temperature sensor; 34: surface temperature sensor; 90: indoor; 91: roof; 92: arrangement recess; 100: air conditioner (embodiment 1); 200: air conditioner (embodiment 2); 220: indoor set (embodiment 2).
Claims (2)
1. an air conditioner, is characterized in that,
Have:
Off-premises station, is provided with compressed refrigerant and can changes the outdoor heat converter carrying out heat exchange between the compressor of compressor frequency and outdoor air and the expansion valve that cold-producing medium is expanded; And
Indoor set, disposed in the interior, and be provided with carry out heat exchange between room air indoor heat converter, towards indoor heat converter supply room air indoor fan, detect the temperature of the suction room air from indoor indoor inhaled air temperature sensor, detect the humidity of the suction room air from indoor indoor suction air humidity sensor, detect the heat-exchanger temperature sensor of the temperature of described indoor heat converter and at least control the control device of described compressor and described indoor fan
Described control device the difference of the air themperature Tin that described indoor inhaled air temperature sensor detects and the design temperature Tset as the temperature preset and difference in air temperature Δ T larger than the temperature instant heating threshold value T1 preset time, the relation of the heat exchanger temperature Te that the air humidity Hin detected according to described indoor suction air humidity sensor and described heat-exchanger temperature sensor detect decides revolutions per minute Nf, carries out the cooling operation described indoor fan being rotated according to the revolutions per minute Nf of this decision;
In described cooling operation, when described difference in air temperature Δ T exceedes the temperature preset than described hot threshold value T1 low temperature and fan threshold value T2, the temperature that described heat-exchanger temperature sensor detects and heat exchanger temperature Te exceed the temperature and changes in temperature threshold value T3 that preset, and described air humidity Hin be less than the humidity that presets namely dry wet threshold value H1 time, described indoor fan is stopped;
And after making described indoor fan stop, using heat exchanger temperature Te with suck the difference of dew-point temperature Tdp of room air as supercooling temperature Δ Tedp, when this supercooling temperature Δ Tedp is less than the temperature and supercooling threshold value T4 that preset, or have passed through when stopping from described indoor fan time of presetting namely again rotational time, described indoor fan is rotated again.
2. air conditioner according to claim 1, is characterized in that,
Described indoor set has the surface temperature sensor of the temperature of the ground surface detecting described indoor;
The temperature that described control device detects based on described surface temperature sensor and surface temperature Tf, described air themperature Tin and described air humidity Hin, according to Ta=Tin+ α × (Hin-60)+β × (Tf-Tin), try to achieve sendible temperature Ta, replace described air themperature Tin and control described compressor and described indoor fan based on described sendible temperature Ta, wherein, to be correction factor, its dimension when considering air humidity Hin be α DEG C/%, β correction factor when being consideration air themperature Tin and surface temperature Tf.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013124407A JP5975937B2 (en) | 2013-06-13 | 2013-06-13 | Air conditioner |
| JP2013-124407 | 2013-06-13 |
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| Publication Number | Publication Date |
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| CN104236027A true CN104236027A (en) | 2014-12-24 |
| CN104236027B CN104236027B (en) | 2017-01-04 |
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| CN201410236215.3A Expired - Fee Related CN104236027B (en) | 2013-06-13 | 2014-05-30 | Air conditioner |
| CN201420286678.6U Expired - Fee Related CN203940582U (en) | 2013-06-13 | 2014-05-30 | Air conditioner |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420286678.6U Expired - Fee Related CN203940582U (en) | 2013-06-13 | 2014-05-30 | Air conditioner |
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| JP (1) | JP5975937B2 (en) |
| CN (2) | CN104236027B (en) |
| GB (1) | GB2516336B (en) |
| MX (1) | MX342141B (en) |
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- 2014-05-30 CN CN201410236215.3A patent/CN104236027B/en not_active Expired - Fee Related
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Also Published As
| Publication number | Publication date |
|---|---|
| CN203940582U (en) | 2014-11-12 |
| JP5975937B2 (en) | 2016-08-23 |
| GB2516336B (en) | 2016-03-09 |
| MX2014007073A (en) | 2014-12-12 |
| GB201406482D0 (en) | 2014-05-28 |
| MX342141B (en) | 2016-09-14 |
| JP2015001310A (en) | 2015-01-05 |
| GB2516336A (en) | 2015-01-21 |
| CN104236027B (en) | 2017-01-04 |
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