CN201547994U - Air conditioner - Google Patents
Air conditioner Download PDFInfo
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- CN201547994U CN201547994U CN2009202589937U CN200920258993U CN201547994U CN 201547994 U CN201547994 U CN 201547994U CN 2009202589937 U CN2009202589937 U CN 2009202589937U CN 200920258993 U CN200920258993 U CN 200920258993U CN 201547994 U CN201547994 U CN 201547994U
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Abstract
The utility model provides an air conditioner. The air conditioner comprises a cooling/heating loop consisting of a compressor, a four-way valve, an indoor heat exchanger, a throttling mechanism and an outdoor heat exchanger which are connected in sequence, and an air conditioner control device which controls all components of the air conditioner to work according to control signals; a spraying enthalpy gain by-pass loop and a defrosting by-pass loop are arranged in the cooling/heating loop; one end of the spraying enthalpy gain by-pass loop is connected with an air suction hole in the middle of the compressor, and the other end is connected between the throttling mechanism and the indoor heat exchanger; a spraying enthalpy gain throttling mechanism is at least arranged on the spraying enthalpy gain by-pass loop; one end of the defrosting by-pass loop is connected between the four-way valve and the indoor heat exchanger, and the other end is connected between the throttling mechanism and the outdoor heat exchanger; a defrosting automatic control valve and a throttling mechanism for defrosting are arranged on the defrosting by-pass loop; a defrosting condition detecting unit is also arranged in the air conditioner; and the defrosting condition detecting unit, the defrosting automatic control valve and the air conditioner control device are in signal connection.
Description
Technical field
The utility model relates to a kind of refrigerating/heat pump system of spraying enthalpy-increasing function that has, particularly relate to and a kind ofly heat when operation, on one side can continue the refrigeration of carrying out attached to the frost on the outdoor heat converter spraying enthalpy-increasing function having of defrost operation is fired pumping system at heat pump.
Background technology
At present, it is to be used under the low-temperature heating operating mode that employing has the air-conditioner that sprays enthalpy-increasing function, and the air-conditioning system of good heating effect is arranged, and the ability of its refrigeration is also relatively good simultaneously.For cold district, the situation of its use is also more and more general.
As the novel patent application prospectus of practicality 200610115719 is disclosed, the dilatation knockout receives the liquid refrigerant from heat exchanger, because the dilatation knockout remains on respect to the lower pressure of inlet liquid refrigerant, so the vaporization of some liquid refrigerants makes remaining liquid refrigerant loss heat in the flash vessel and became cold.The steam that obtains in flash vessel is under the pressure of increase, and can be injected in the compressor to increase the heating and/or the cooling capacity of system.Because the cold-producing medium of vaporization is in the pressure that is significantly higher than the gasified refrigerant of leaving evaporimeter but is lower than the outlet cold-producing medium stream that leaves compressor, so the cold-producing medium from the pressurization of flash vessel makes compressor the cold-producing medium of this pressurization can be compressed to its normal output pressure, makes it pass the part of compressor simultaneously.Simultaneously, place the cold excessively cold-producing medium of dilatation knockout to increase the ability and the efficient of heat exchanger similarly.Cross cold liquid and from flash vessel, discharge, and (i.e. heating or cooling) is transported to one of them heat exchanger according to required mode.Because liquid is in supercooled state, so heat exchanger can absorb more heat from surrounding environment, thus the overall performance of raising heating or cool cycles.
But actual the heating in the process in that cold district uses because the temperature of outdoor heat exchanger is lower than common air-conditioning heat pump, is easy to frosting more.And the general Defrost mode that cross valve is switched, makes the refrigerant reverse flow in the freezing loop that adopts of the Defrost mode in the heat pump air conditioner.That is the flow of refrigerant direction during defrost operation is identical with when refrigeration, allows the refrigerant of HTHP flow in outdoor heat converter, thereby will melt attached to the frost on the heat exchanger.But in such Defrost mode, the heat exchanger of an indoor side has become evaporimeter during owing to defrosting, so can produce the problem that indoor temperature descends, the user can have chilling sensation suddenly.Though the designer of air-conditioning is often closed down in the blower fan minimizing cold inlet chamber of indoor by employing, or detection heat exchange temperature, the time close reduce to defrost the influence of mode such as blower fan air-supply to indoor temperature and human body sensory less than setting value when temperature, but in the winter of cold, stop indoor temperature being reduced, the comfort of human body is reduced indoor heating.Particularly frosting and defrosting situation are more abominable has the heat pump air conditioner that sprays enthalpy-increasing function.
The utility model content
The technical problems to be solved in the utility model is to overcome the deficiencies in the prior art, a kind of like this air-conditioner that sprays enthalpy-increasing function that has is provided, freezing loop in this air-conditioner is made of simple bypass circulation, on one side can proceed to heat operation, Yi Bian carry out stable defrost operation.
Technical scheme disclosed in the utility model is: a kind of air-conditioner, comprise the refrigerating/heating loop that is formed by connecting by compressor (1), cross valve (2), indoor heat converter (3), first throttle mechanism (4), outdoor heat converter (5) successively, and the air conditioner controlling device (111) of controlling each parts action of air-conditioner according to control signal; It is characterized in that: be provided with injection in the described refrigerating/heating loop and increase enthalpy bypass circulation (6) and defrosting bypass circulation (9), the end that described injection increases enthalpy bypass circulation (6) is connected with air entry (12) in the middle of the compressor, the other end is connected between first throttle mechanism and the indoor heat converter, and described injection increases to be provided with at least on the enthalpy bypass circulation (6) to spray and increases enthalpy throttling arrangement (8); One end of described defrosting bypass circulation (9) is connected between cross valve and the indoor heat converter, and the other end is connected between first throttle mechanism and the outdoor heat converter, is provided with defrosting autocontrol valve (10) on the described defrosting bypass circulation (9) at least; Also be provided with defrosting condition detecting unit (110) in the described air-conditioner, described defrosting condition detecting unit, defrosting autocontrol valve (10) are connected with air conditioner controlling device (111) signal.
As further improvement of the utility model, described injection increases between enthalpy bypass circulation (6) and the indoor heat converter (3) and is provided with second throttle mechanism (13), and described injection increases enthalpy bypass circulation (6) and also is provided with to spray and increases enthalpy autocontrol valve (7); Described injection increases enthalpy autocontrol valve (7) and is connected with air conditioner controlling device (111) signal.
Further improve as of the present utility model, described injection increases between enthalpy bypass circulation (6), first throttle mechanism (4) and second throttle mechanism (13) and is provided with separatory flash vessel (16).
Described injection increases the top that enthalpy bypass circulation (6) is connected separatory flash vessel (16), and first throttle mechanism (4) is connected the bottom of separatory flash vessel (16), and second throttle mechanism (13) is connected the middle part of separatory flash vessel (16).
Described injection increases enthalpy throttle mechanism (8) and is made of capillary or capillary group or electric expansion valve; Described compressor is to have to spray scroll compressor or rotor compressor or the helical-lobe compressor that increases enthalpy.
As another improvement of the present utility model, be connected with the refrigeration branch road in parallel with separatory flash vessel (16) between described first throttle mechanism (4) and second throttle mechanism (13), described refrigeration branch road is provided with refrigeration branch road throttle mechanism (17) and the branch road check valve (18) that freezes.
Described refrigeration branch road throttle mechanism (17) is capillary or capillary group or electric expansion valve.
As another improvement of the present utility model, the branch road between described separatory flash vessel (16) and the first throttle mechanism (4) is provided with check valve (19).
As another improvement of the present utility model, the bottom of described separatory flash vessel is provided with heater, and described heater is connected with the air conditioner controlling device signal.
As another improvement of the present utility model, the outside of described separatory flash vessel is provided with heat-insulation layer.
Disclosed band sprays the air-conditioner that increases the enthalpy system and has heated remarkable advantages at cold district in the prior art, and the environment of the frosting that it is faced will more abominable, be lower than the common air-conditioning device owing to the off-premises station temperature on the one hand, be easier to frosting; On the other hand, the cycle of the defrosting defrosting time that shortens increases, and is bigger for user's comfortableness influence.The above disclosed technical scheme of the utility model just at the abominable defrosting situation of above-mentioned air-conditioner, makes that indoor set can heat in defrosting, improves user's comfortableness.
Description of drawings
Fig. 1 is the refrigerating/heating circulation process schematic diagram of the air-conditioner among the utility model embodiment 1,
Fig. 2 heats-the defrost cycle schematic flow sheet for the air-conditioner among the utility model embodiment 1,
Fig. 3 is the system schematic of the air-conditioner among the utility model embodiment 2,
Fig. 4 is the system schematic of the air-conditioner among the utility model embodiment 3,
Fig. 5 is the system schematic of the air-conditioner among the utility model embodiment 4,
Fig. 6 is the refrigerating/heating circulation process schematic diagram of the air-conditioner among the utility model embodiment 5,
Fig. 7 heats-the defrost cycle schematic flow sheet for the air-conditioner among the utility model embodiment 5,
Fig. 8 is the utility model control system block diagram.
In the above-mentioned accompanying drawing, 1 is compressor, and 2 is cross valve, 3 is indoor heat converter, and 4 is first throttle mechanism, and 5 is outdoor heat converter, 6 is to spray to increase the enthalpy bypass circulation, 7 for injection increases the enthalpy autocontrol valve, and 8 for injection increases the enthalpy throttle mechanism, and 9 are the defrosting bypass circulation, 10 are the defrosting autocontrol valve, 11 is the defrosting throttle mechanism, and 12 is air entry in the middle of the compressor, and 13 is second throttle mechanism, 14 is indoor set, 15 is off-premises station, and 16 is the separatory flash vessel, and 17 are refrigeration branch road throttle mechanism, 18 are refrigeration branch road check valve, 19 is the flash vessel check valve, and 20 is heater, and 21 is compressor return air pipe gas-liquid separator.
The specific embodiment
Come with reference to the accompanying drawings some embodiment of the utility model are elaborated, need to prove, such embodiment is not in order to restriction the utility model.
Fig. 1 and Fig. 2 are the refrigerating/heating circulation process schematic diagram of the utility model embodiment 1 and heat-the defrost cycle schematic flow sheet, in Fig. 1, include indoor heat exchanger 3 in the indoor set 14, comprise compressor 1 in the off-premises station 15, cross valve 2, first throttle mechanism 4, outdoor heat converter 5, injection increases enthalpy bypass circulation 6, injection increases enthalpy throttle mechanism 8, defrosting bypass circulation 9, defrosting autocontrol valve 10, air entry 12 in the middle of the compressor, compressor return air pipe gas-liquid separator 21.The first throttle mechanism 4 here is an electric expansion valve, sprays to increase enthalpy throttle mechanism 8 employing electric expansion valves, and defrosting autocontrol valve 10 selects that on-off function is arranged, and the control valve of certain throttling capacity is arranged.
When air conditioner normally freezed or heats, the autocontrol valve 10 of bypass circulation 9 was in closed condition, so there is not refrigerant to flow in this defrosting bypass circulation 9.Shown in Figure 1, when indoor set 14 refrigerating operatons, refrigeration working medium flows along the direction shown in the solid arrow among the figure, the gases at high pressure that compressor 1 is discharged flow to outdoor heat converter 5 by cross valve 2, through of the throttling of the condensed high-pressure liquid of heat exchange, become the refrigeration working medium of low pressure through first throttle mechanism 4; Under cooling condition, spray and to increase enthalpy throttle mechanism 8 and open, so wherein a part enters compressor 1 by air entry 12 in the middle of the compressor after injection increases enthalpy bypass circulation 6 and injection and increases enthalpy throttle mechanism 8; The refrigeration working medium of another part low pressure becomes the refrigeration working medium of low pressure gaseous state through indoor heat converter 3 and room air heat exchange, enters gas-liquid separator 21 through cross valve 2 then, enters compressor low pressure air suction mouth at last.As can be seen a part through the gas of throttling and flash distillation not through indoor set 14, thereby reduce taking of this part gas heat exchanging area, improved the heat exchange efficiency of heat exchanger.
When indoor set 14 carries out heating operation, refrigeration working medium flows along the direction shown in the dotted arrow among Fig. 1, the gases at high pressure that compressor 1 is discharged flow to indoor heat converter 3 by cross valve 2, become the refrigeration working medium of low pressure through the throttling of first throttle mechanism 4 through the condensed high-pressure liquid working medium part of heat exchange, become the refrigeration working medium of low pressure gaseous state through outdoor heat converter 5 heat exchange, enter gas-liquid separator 21 through cross valve 2 then, enter compressor low pressure air suction mouth at last; Under the heating condition, spray and to increase enthalpy throttle mechanism 8 and open, thus another part working medium through injection increase enthalpy bypass circulation 6 and injection and increase enthalpy throttle mechanism 8 after, enter compressor by air entry 12 in the middle of the compressor.As can be seen a part through the gas of throttling and flash distillation not through off-premises station, thereby reduce taking of this part gas heat exchanging area, improved the heat exchange efficiency of heat exchanger, the gas of flash distillation directly returns the middle air entry 12 of compressor after the throttling simultaneously, improve the delivery temperature of compressor, improved user's comfortableness.
Fig. 2 heats for present embodiment one-the defrost cycle schematic flow sheet, the circulation process schematic diagram that defrosts when promptly heating, part refrigeration working medium carries out heating operation by indoor heat converter 3, refrigeration working medium flows along the direction shown in the dotted arrow among Fig. 2, part refrigeration working medium carries out Defrost operation at outdoor heat converter 5, and refrigeration working medium flows along the direction shown in the figure dotted line arrow.The high temperature and high pressure gas of discharging by compressor 1 flows out through cross valve 2, the working medium that wherein heats circulation is through indoor heat exchanger 3, because first throttle mechanism 4 is in closed condition, injection increases enthalpy throttle mechanism 8 and opens, through the working medium of indoor heat exchange through injection increase enthalpy bypass circulation 6 and injection and increase enthalpy throttle mechanism 8 after, enter compressor by air entry 12 in the middle of the compressor; Because defrosting autocontrol valve 10 is opened, the working medium of another part defrost cycle enters defrosting bypass circulation 9, by defrosting autocontrol valve 10 partial throttlings, flow to outdoor heat converter 5, after working medium after the defrosting cooling was separated through cross valve 2, gas-liquid separator 21, the gaseous working medium of low pressure entered the compressor air suction mouth.Defrosting autocontrol valve 10 is a motor-driven valve in the present embodiment, and spool can remain on the position and the position intermediate of break-make, and has certain throttling function.The compressor that adopts injection to increase enthalpy is scroll compressor, rotor-type compressor or screw compressor, or the combination of above a plurality of compressors, adopts rotor-type compressor in the present embodiment.
As shown in Figure 3, difference between present embodiment and the embodiment 1 is: increasing in injection increases by second throttle mechanism 13 between enthalpy bypass circulation 6 and the indoor heat converter 3, increase on the enthalpy bypass circulation 6 in injection, increased to spray and increased enthalpy autocontrol valve 7, increased enthalpy throttle mechanism 8 and adopt capillaries to control the working medium flow that increases enthalpy bypass circulation 6 by injection and spray.By second throttle mechanism 13, first throttle mechanism 4 and injection increase flow and the pressure drop that enthalpy throttle mechanism 8 is controlled each self-loop.Original defrosting autocontrol valve 10 back have increased defrosting throttle mechanism 11, and defrosting autocontrol valve 10 adopts two-way electronic valve, and defrosting throttle mechanism 11 adopts capillary or capillary group, can under fewer cost effect preferably be arranged.Under such deployment scenarios, while can proceed to heat to defrost.The compressor 1 that adopts in the present embodiment 2 sprays the scroll compressor that increases enthalpy for having.
As shown in Figure 4, the difference of present embodiment and embodiment 2 is: increasing between enthalpy bypass circulation 6, first throttle mechanism 4 and second throttle mechanism 13 in injection has increased separatory flash vessel 16, wherein spray and increase the top that enthalpy bypass circulation 6 is connected to separatory flash vessel 16, first throttle mechanism 4 is connected to the bottom of separatory flash vessel 16, and second throttle mechanism 13 is connected to the middle part of separatory flash vessel 16.Separatory flash vessel 16 is equivalent to the effect of heat exchanger, inner decompression working medium is gasified fully, make to increase working medium that enthalpy bypass circulation 6 flows to air entry 12 in the middle of the compressor based on gaseous working medium, increase the degree of supercooling of liquid refrigerant in the separatory flash vessel 16 simultaneously from injection.During cooling condition, after refrigeration working medium flowed to separatory flash vessel 16 from first throttle mechanism 4, gaseous working medium increased the middle air entry 12 that enthalpy bypass circulation 6 is introduced compressor from the injection on flash vessel top; Liquid working substance flows through second throttle mechanism 13 and enters indoor heat converter 3, enters the air entry of compressor then behind cross valve 2; During heating condition, after high temperature refrigerant flowed to the separatory flash vessel from second throttle mechanism 13, gaseous working medium increased the middle air entry 12 that enthalpy bypass circulation 6 is introduced compressor from the injection on flash vessel top; Liquid working substance flows through first throttle mechanism 4 and enters indoor heat converter 3, enters the air entry of compressor then behind cross valve 2.Present embodiment and embodiment 2 relatively makes separating of Working medium gas and liquid more abundant by flash vessel 16, thereby increased the heat exchange efficiency that liquid flows through the back heat exchanger, also improved and sprays the effect that increases enthalpy.Also can cancel in the present embodiment spraying and increase enthalpy autocontrol valve 7.
Present embodiment and embodiment 3 differences are: have the bypass branch road to be connected to second throttle mechanism 13 from first throttle mechanism 4 on flash vessel 16 next doors, and refrigeration branch road throttle mechanism 17 and refrigeration branch road check valve 18 are arranged on this branch road.Why increase refrigeration branch road throttle mechanism 17 and refrigeration branch road check valve 18 have been mainly the system that solves among the embodiment 3 under cooling condition, the flow resistance of flash vessel 16 of flowing through is bigger, and the problem that refrigerant flow is influenced by intermediate pressure, make under cooling condition, directly pass through the refrigeration branch road throttle mechanism 17 and the branch road check valve 18 that freezes after the cold-producing medium process first throttle mechanism 4 of high-pressure liquid directly to second throttle mechanism 13, thus raising refrigerating operaton efficient.The branch road throttle mechanism that wherein freezes is capillary or capillary group.
Shown in accompanying drawing 6,7, present embodiment and embodiment 4 differences are: flowing in flash vessel 16 bottoms on the branch road of first throttle mechanism 4 has increased check valve 19, make liquid refrigerant flow to first throttle mechanism 4 by flash vessel 16 bottoms, increased heater 20 in the bottom of flash vessel 16 in addition, heater 20 is an electric heater in the present embodiment, be installed on flash vessel 16 inside, at flash vessel 16 outer setting insulation materials parcel flash vessel 16.
In Fig. 6, include indoor heat exchanger 3 in the indoor set 14, comprise 1 compressor in the off- premises station 15,2 cross valves, 4 first throttle mechanisms, 5 outdoor heat converters, 6 injections increase the enthalpy bypass circulation, 7 injections increase the enthalpy autocontrol valve, and 8 injections increase the enthalpy throttle mechanism, 9 defrosting bypass circulations, 10 defrosting autocontrol valves, air entry in the middle of the 11 defrosting throttle mechanisms, 12 compressors, 13 is second throttle mechanism, 14 is indoor set, 15 is off-premises station, and 16 is flash vessel, and 17 are refrigeration branch road throttle mechanism, 18 are refrigeration branch road check valve, 19 is the flash vessel check valve, and 20 is heater, 21 compressor return air pipe gas-liquid separators.The first throttle mechanism 4 here is an electric expansion valve, sprays to increase enthalpy throttle mechanism 8 employing capillary groups.
When air conditioner normally freezed or heats, the autocontrol valve 10 of defrost circuit was in closed condition, so there is not refrigerant to flow in this defrosting bypass circulation 9.Shown in Figure 6, when indoor set 14 refrigerating operatons, refrigeration working medium flows along the direction shown in the solid arrow among the figure, the gases at high pressure that compressor 1 is discharged flow to outdoor heat converter 5 by cross valve 2, through of the throttling of the condensed high-pressure liquid of heat exchange through first throttle mechanism 4, become the refrigeration working medium of low pressure, because check valve 18 restrictions of flash vessel 16 lower leg, refrigeration working medium can only be by refrigeration branch road throttle mechanism 17, refrigeration branch road check valve 18, second throttle mechanism 13 flows to indoor heat converter, become the refrigeration working medium of low pressure gaseous state through indoor heat converter 3 and room air heat exchange, enter gas-liquid separator 21 through cross valve 2 then, enter compressor low pressure air suction mouth at last.A refrigeration working medium part increases enthalpy bypass circulation 6 through check valve 18 after the gas that flash vessel 16 flash distillations are come out enters the injection on flash vessel top, through injection increase enthalpy autocontrol valve 7 and injection and increase enthalpy throttle mechanism 8 after, enter compressor by air entry 12 in the middle of the compressor.
When indoor set 14 carries out heating operation, refrigeration working medium flows along the direction shown in the dotted arrow among the figure, the gases at high pressure that compressor 1 is discharged flow to indoor heat converter 3 by cross valve 2, after 13 decompressions of second throttle mechanism, flow into flash vessel 16 through the condensed high-pressure liquid working medium of heat exchange, the injection that the gas that flash distillation is come out in flash vessel 16 enters flash vessel top increases enthalpy bypass circulation 6, through injection increase enthalpy autocontrol valve 7 and injection and increase enthalpy throttle mechanism 8 after, enter compressor by air entry 12 in the middle of the compressor; Liquid refrigerant in flash vessel 16 flows out from the flash vessel bottom, flow to outdoor heat converter 5 through flash vessel check valve 19, first throttle mechanism 4, become the refrigeration working medium of low pressure gaseous state through heat exchange, enter gas-liquid separator 21 through cross valve 2 then, enter compressor low pressure air suction mouth at last.In addition, when the user has higher requirements to heating capacity or the speed of heating, can start-up point heater 20, to the heating of the liquid working substance in the flash vessel 16, increase the Working medium gas flow that increases the enthalpy bypass circulation by injection, improve compressor exit temperature and working medium internal circulating load.Adopt refrigeration branch road throttle mechanism 17, refrigeration branch road check valve 18, flash vessel check valve 19 makes the working medium flow direction that heats and freeze be more conducive to improve the ability that heats or freeze, in addition, increased heater 20 and made that the user can be under the situation of extreme cold, under the situation that the user has relatively high expectations to comfort level, guarantee the flexibility that higher comfortableness and user select.
Fig. 7 heats for present embodiment 5-the defrost cycle schematic flow sheet, the circulation process schematic diagram that defrosts when promptly heating, part refrigeration working medium carries out heating operation by indoor heat converter 3, refrigeration working medium flows along the direction shown in the dotted arrow among the figure, part refrigeration working medium carries out Defrost operation by outdoor heat converter 5, and refrigeration working medium flows along the direction shown in the figure dotted line arrow.The high temperature and high pressure gas that compressor 1 is discharged flows out through cross valve 2, the working medium that wherein heats circulation is through indoor heat exchanger 3, to indoor transfer heat, first throttle mechanism 4 is in closed condition at this moment, injection increases enthalpy autocontrol valve 7 and opens, working medium through indoor heat exchange enters flash vessel 16 through second throttle mechanism 13, wherein the gas part is discharged from the top of flash vessel 16, increase enthalpy bypass circulation 6 through spraying, spray increase enthalpy autocontrol valve 7 and injection and increase enthalpy throttle mechanism 8 after, enter compressor by air entry 12 in the middle of the compressor; Because defrosting autocontrol valve 10 is opened, the working medium of another part defrost cycle enters defrosting bypass circulation 9, by defrosting autocontrol valve 10, defrosting throttle mechanism 11, flow to outdoor heat converter 5, after working medium after the defrosting cooling was separated through cross valve 2, gas-liquid separator 21, the gaseous working medium of low pressure entered the compressor air suction mouth.Defrosting autocontrol valve 10 is a two-way electronic valve in the present embodiment, and defrosting throttle mechanism 11 is a capillary, and injection increases enthalpy autocontrol valve 7 and is two-way electronic valve, and injection increases enthalpy throttle mechanism 8 and is the capillary group.Increased heater 20 in the bottom of flash vessel 16, when condensation in the flash vessel during liquid working substance of some, can become gas to working medium by heater 20, and sucked by air entry in the middle of the compressor 12, increase the delivery temperature of compressor simultaneously, improve the comfortableness of room conditioning and the effect of defrosting, reduce defrosting time.
More than during to the system's stream of a plurality of embodiment of the utility model and operation the flow direction of working medium introduce, particularly under the cooling condition, heating condition descends and heats under the while defrosting operating condition, because the mutual conversion of cooling and warming operating mode belongs to widely used known technology, here do not do detailed description, describe in detail from heating condition below and be transformed into the control step that heats the while defrosting operating condition, see Fig. 8 the utility model control system block diagram, this control system comprises: defrosting condition detecting unit 110, air conditioner controlling device 111, indoor fan wind-speed adjusting device 121, outdoor fan wind-speed adjusting device 122, defrosting autocontrol valve control device 123, first throttle mechanism controls device 124, compressor rotary speed control device 125, cross valve flow control apparatus 126, heater control device 127 and injection increase enthalpy autocontrol valve control device 128.
When the air conditioner controlling device in the indoor set 14 111 when the defrosting condition detecting unit 110 of off-premises station 15 receives the defrosting commencing signal, according to the judged result of defrost operation a plurality of control and regulation devices are controlled.It is shown in Figure 8,
Heat when air-conditioner changes over to from heating condition-during defrosting operating condition, air conditioner controlling device 111 control outdoor fan wind-speed adjusting devices 122 stop outdoor fan;
Air conditioner controlling device 111 control defrosting autocontrol valve control device 123 are opened defrosting autocontrol valve 10;
Air conditioner controlling device 111 control is sprayed and is increased enthalpy autocontrol valve control device 128 and make to spray and increase enthalpy autocontrol valve 7 (or do not spray when not increasing enthalpy autocontrol valve 7, electric expansion valve-injections of control flow increases enthalpy throttle mechanism 8) unlatching;
Air conditioner controlling device 111 control first throttle mechanism controls devices 124 are closed first throttle mechanism 4;
Air conditioner controlling device 111 control compressor rotary speed control device 125 make compressor 1 rotating speed keep current rotating speed or improve compressor rotary speed;
Air conditioner controlling device 111 control cross valve flow control apparatus 126 remain unchanged the existing flow direction of cross valve 2;
Air conditioner controlling device 111 control heater control device 127 make the heater 20 of flash vessel 16 open or open according to the amount of liquid working substance wherein;
Air conditioner controlling device 111 control room inner blower wind-speed adjusting devices 121 make indoor fan keep original rotating speed or adjust to low wind shelves.
Next, when the air conditioner controlling device in the indoor set 14 111 when the defrosting condition detecting unit 110 of off-premises station 15 receives the defrosting end signal, the judged result that finishes according to defrost operation is controlled all control modules 121～128 and is returned to normal air-conditioning and heat state.
Claims (10)
1. air-conditioner, comprise the refrigerating/heating loop that is formed by connecting by compressor (1), cross valve (2), indoor heat converter (3), first throttle mechanism (4), outdoor heat converter (5) successively, and the air conditioner controlling device (111) of controlling each parts action of air-conditioner according to control signal; It is characterized in that: be provided with injection in the described refrigerating/heating loop and increase enthalpy bypass circulation (6) and defrosting bypass circulation (9), the end that described injection increases enthalpy bypass circulation (6) is connected with air entry (12) in the middle of the compressor, the other end is connected between first throttle mechanism and the indoor heat converter, and described injection increases to be provided with at least on the enthalpy bypass circulation (6) to spray and increases enthalpy throttling arrangement (8); One end of described defrosting bypass circulation (9) is connected between cross valve and the indoor heat converter, and the other end is connected between first throttle mechanism and the outdoor heat converter, is provided with defrosting autocontrol valve (10) on the described defrosting bypass circulation (9) at least; Also be provided with defrosting condition detecting unit (110) in the described air-conditioner, described defrosting condition detecting unit, defrosting autocontrol valve (10) are connected with air conditioner controlling device (111) signal.
2. air-conditioner according to claim 1, it is characterized in that: described injection increases between enthalpy bypass circulation (6) and the indoor heat converter (3) and is provided with second throttle mechanism (13), and described injection increases enthalpy bypass circulation (6) and also is provided with to spray and increases enthalpy autocontrol valve (7); Described injection increases enthalpy autocontrol valve (7) and is connected with air conditioner controlling device (111) signal.
3. air-conditioner according to claim 2 is characterized in that: described injection increases between enthalpy bypass circulation (6), first throttle mechanism (4) and second throttle mechanism (13) and is provided with separatory flash vessel (16).
4. air-conditioner according to claim 2, it is characterized in that: described injection increases the top that enthalpy bypass circulation (6) is connected separatory flash vessel (16), first throttle mechanism (4) is connected the bottom of separatory flash vessel (16), and second throttle mechanism (13) is connected the middle part of separatory flash vessel (16).
5. air-conditioner according to claim 2 is characterized in that: described injection increases enthalpy throttle mechanism (8) and is made of capillary or capillary group or electric expansion valve; Described compressor is to have to spray scroll compressor or rotor compressor or the helical-lobe compressor that increases enthalpy.
6. air-conditioner according to claim 3, it is characterized in that: be connected with the refrigeration branch road in parallel with separatory flash vessel (16) between described first throttle mechanism (4) and second throttle mechanism (13), described refrigeration branch road is provided with refrigeration branch road throttle mechanism (17) and the branch road check valve (18) that freezes.
7. air-conditioner according to claim 6 is characterized in that: described refrigeration branch road throttle mechanism (17) is capillary or capillary group or electric expansion valve.
8. air-conditioner according to claim 6 is characterized in that: the branch road between described separatory flash vessel (16) and the first throttle mechanism (4) is provided with check valve (19).
9. air-conditioner according to claim 8 is characterized in that: the bottom of described separatory flash vessel (16) is provided with heater (20), and described heater (20) is connected with air conditioner controlling device (111) signal.
10. according to Claim 8 or 9 described air-conditioners, it is characterized in that: the outside of described separatory flash vessel (16) is provided with heat-insulation layer.
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| CN2009202589937U CN201547994U (en) | 2009-11-12 | 2009-11-12 | Air conditioner |
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| CN2009202589937U CN201547994U (en) | 2009-11-12 | 2009-11-12 | Air conditioner |
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Cited By (11)
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| CN102563974A (en) * | 2012-02-17 | 2012-07-11 | 重庆大学 | Coupling injection enthalpy-increasing air source heat pump system |
| CN102748807A (en) * | 2011-12-20 | 2012-10-24 | 广东美的电器股份有限公司 | Air conditioning system and control method thereof |
| CN103123147A (en) * | 2013-03-27 | 2013-05-29 | 宁波奥克斯空调有限公司 | Variable refrigerant flow air conditioning system and control method thereof |
| CN104422086A (en) * | 2013-08-26 | 2015-03-18 | 松下电器产业株式会社 | Air conditioner |
| CN104634019A (en) * | 2015-01-22 | 2015-05-20 | 青岛澳柯玛超低温冷冻设备有限公司 | Medical refrigeration container hot gas defrosting system for temperature and humidity control |
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