CN103363709B - Heat pump type air adjusting device - Google Patents
Heat pump type air adjusting device Download PDFInfo
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- CN103363709B CN103363709B CN201210102158.0A CN201210102158A CN103363709B CN 103363709 B CN103363709 B CN 103363709B CN 201210102158 A CN201210102158 A CN 201210102158A CN 103363709 B CN103363709 B CN 103363709B
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Abstract
The invention provides a kind of heat pump type air adjusting device, comprise: air conditioning major loop, air conditioning major loop comprises the compressor connected in turn by refrigeration pipe, four-way change-over valve, outdoor heat exchanger, first throttle device, flash vessel, expansion gear and indoor heat exchanger, the first interface of four-way change-over valve is communicated with the port of export of compressor, second interface is communicated with outdoor heat exchanger, 3rd interface is communicated with indoor heat exchanger, 4th interface is communicated with the arrival end of compressor, tonifying Qi loop, one end is connected with flash vessel, the other end is connected with compressor, tonifying Qi loop comprises the tonifying Qi valve connected by pipeline, defroster, for carrying out defrost operation to outdoor heat exchanger, defroster is the defrosting branch road with branch road valve, heat pump type air adjusting device also comprises refrigerant heater, and refrigerant heater is arranged on air conditioning major loop.Heat pump type air adjusting device defrosting of the present invention is timely and structure is simple.
Description
Technical field
The present invention relates to filed of air conditioning, in particular to a kind of heat pump type air adjusting device.
Background technology
Heat pump type air adjusting device of the prior art generally adopts Two-stage Compression technology, Two-stage Compression technology carries out process of refrigerastion by flash vessel and throttling arrangement, those skilled in the art all know when heating, because the existence of flash vessel, refrigerant when flowing through flash vessel inherently by again excessively cold, namely the refrigerant flowing into outdoor heat exchanger must be in compared to temperature lower single stage compress technology, and so its frosting situation can be more serious, frequent.Traditional Defrost mode is at air-conditioning heating running, four-way change-over valve is switched to kind of refrigeration cycle flow process, the refrigerant of the HTHP allowing compressor discharge is drained in outdoor heat exchanger through four-way change-over valve, to melt frost layer on air conditioner room outdoor heat exchanger or ice sheet.First traditional Defrost mode needs compressor shutdown, and inner blower is after blowing waste heat after a while, and four-way change-over valve just commutates and defrosts.After having defrosted, compressor stagnates a period of time again, and then four-way change-over valve commutates again, heats.After a period of time opened by compressor, interior pipe temperature rise just can obtain hot blast to uniform temperature.This process approximately needs 12 ~ 15min even longer, can not defrost in time.
Summary of the invention
The present invention aims to provide a kind of heat pump type air adjusting device, and heat pump type air adjusting device of the present invention does not need compressor shutdown just can defrost, and defrosting is timely and structure is simple.
To achieve these goals, according to an aspect of the present invention, provide a kind of heat pump type air adjusting device, comprise: air conditioning major loop, air conditioning major loop comprises the compressor connected in turn by refrigeration pipe, four-way change-over valve, outdoor heat exchanger, first throttle device, flash vessel, expansion gear and indoor heat exchanger, the first interface of four-way change-over valve is communicated with the port of export of compressor, second interface is communicated with outdoor heat exchanger, 3rd interface is communicated with indoor heat exchanger, 4th interface is communicated with the arrival end of compressor, four-way change-over valve have by first interface and the second orifice and by the 3rd interface and the 4th orifice with make heat pump type air adjusting device carry out refrigerating operaton the first state and by first interface and the 3rd orifice and by the second interface and the 4th orifice with the second state making heat pump type air adjusting device carry out heating operation, tonifying Qi loop, one end is connected with flash vessel, and the other end is connected with compressor, and tonifying Qi loop comprises the tonifying Qi valve connected by pipeline, defroster, for carrying out defrost operation to outdoor heat exchanger, stating defroster is the defrosting branch road with branch road valve, heat pump type air adjusting device also comprises refrigerant heater, and refrigerant heater is arranged on air conditioning major loop.
Further, defrost that the first end of branch road is connected between the port of export of compressor and four-way change-over valve, the second end is connected between outdoor heat exchanger and first throttle device.
Further, defrost that the first end of branch road is connected between four-way change-over valve and indoor heat exchanger, the second end is connected between outdoor heat exchanger and first throttle device.
Further, the branch road that defrosts also comprises the second throttling arrangement be connected in series with branch road valve.
Further, refrigerant heater is arranged between the arrival end of compressor and four-way change-over valve.
Further, refrigerant heater is arranged between outdoor heat exchanger and the second throttling arrangement.
Further, heat pump type air adjusting device also comprises control device, control device controls heat pump type air adjusting device between different defrost control mode, switches to carry out defrost operation to outdoor heat exchanger, defrost control mode comprises: the first defrosting mode, under the first defrosting mode, valve open, four-way change-over valve is in the second state, and refrigerant heater is opened; Second defrosting mode, under the second defrosting mode, valve closing, four-way change-over valve is in the first state, and refrigerant heater cuts out.
Further, heat pump type air adjusting device also comprises outside heat exchange blower fan; Control device also comprises the first temperature measuring equipment for detecting outdoor environment temperature, under the first defrosting mode, when the first temperature measuring equipment detects that outdoor environment temperature is greater than the first predetermined temperature, outside control device control room, heat exchange blower fan is opened, and outdoor environment temperature is less than or equal to heat exchange blower fan outside the first predetermined temperature timed unit control room and closes.
Further, heat pump type air adjusting device also comprises indoor heat exchange blower fan; Control device also comprises the second temperature measuring equipment of the coil temperature for detecting indoor heat exchanger, under the first defrosting mode, when the second temperature measuring equipment detects that the coil temperature of indoor heat exchanger is more than or equal to the second predetermined temperature, inside control device control room, heat exchange blower fan is opened, when detecting that the coil temperature of indoor heat exchanger is less than the 3rd predetermined temperature, inside control device control room, heat exchange blower fan cuts out, and wherein, the 3rd predetermined temperature is less than or equal to the second predetermined temperature.
Further, compressor continuous service under the first defrosting mode.
Further, compressor is frequency-changeable compressor, and under the first defrosting mode, compressor runs in the scope of 60 to 120Hz.
Further, control device also comprises the time detection device detecting the operation duration of heat pump type air adjusting device under the first defrosting mode, when time detection device detects that running duration is more than or equal to predetermined amount of time, control device controls heat pump type air adjusting device and switches to the second defrosting mode from the first defrosting mode.
Further, control device also comprises the 3rd temperature measuring equipment for heat exchanger coils temperature outside sensing chamber, when heat pump type air adjusting device heating operation, when the 3rd temperature measuring equipment detects that outdoor heat exchanger coil temperature is less than or equal to the 4th predetermined temperature, control device controls refrigerant heater and opens.
Further, control device also comprises the first temperature measuring equipment for detecting outdoor environment temperature and the 3rd temperature measuring equipment for heat exchanger coils temperature outside sensing chamber, when heat pump type air adjusting device heating operation, when the 3rd temperature measuring equipment detects that the difference that outdoor heat exchanger coil temperature is less than the outdoor environment temperature that the first temperature measuring equipment detects exceedes predetermined temperature difference, control device controls refrigerant heater and opens.
Further, control device also comprises the first temperature measuring equipment for detecting outdoor environment temperature, when heat pump type air adjusting device heating operation, when the first temperature measuring equipment detects that outdoor environment temperature is less than or equal to the 5th temperature, control device controls refrigerant heater and opens.
Further, tonifying Qi loop also comprises the check valve be arranged in series with tonifying Qi valve.
Further, the branch road that defrosts also comprises the second throttling arrangement and check valve that are connected in series with branch road valve.
Apply technical scheme of the present invention, heat pump type air adjusting device, comprise: air conditioning major loop, air conditioning major loop comprises the compressor connected in turn by refrigeration pipe, four-way change-over valve, outdoor heat exchanger, first throttle device, flash vessel, expansion gear and indoor heat exchanger, the first interface of four-way change-over valve is communicated with the port of export of compressor, second interface is communicated with outdoor heat exchanger, 3rd interface is communicated with indoor heat exchanger, 4th interface is communicated with the arrival end of compressor, four-way change-over valve have by first interface and the second orifice and by the 3rd interface and the 4th orifice with make heat pump type air adjusting device carry out refrigerating operaton the first state and by first interface and the 3rd orifice and by the second interface and the 4th orifice with the second state making heat pump type air adjusting device carry out heating operation, tonifying Qi loop, one end is connected with flash vessel, and the other end is connected with compressor, and tonifying Qi loop comprises the tonifying Qi valve connected by pipeline, defroster, for carrying out defrost operation to outdoor heat exchanger, stating defroster is the defrosting branch road with branch road valve, heat pump type air adjusting device also comprises refrigerant heater, and refrigerant heater is arranged on air conditioning major loop.Heat pump type air adjusting device, under the first defrosting mode, can utilize the sensible heat of refrigerant to carry out defrost compressor and not shut down while heating, and directly the high temperature refrigerant that compressor is discharged is passed into outdoor heat exchanger, thus can realize defrosting in time rapidly; Under the second defrosting mode, defrosting intensity can be strengthened.
Accompanying drawing explanation
The Figure of description forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 shows the system schematic of the first embodiment of heat pump type air adjusting device of the present invention;
Refrigerant when Fig. 2 shows the refrigerating operaton of the heat pump type air adjusting device of Fig. 1 flows to schematic diagram;
Refrigerant when Fig. 3 shows the heating operation of the heat pump type air adjusting device of Fig. 1 flows to schematic diagram;
The refrigerant that the heat pump type air adjusting device that Fig. 4 shows Fig. 1 is run under the first defrosting mode flows to schematic diagram;
The refrigerant that the heat pump type air adjusting device that Fig. 5 shows Fig. 1 is run under the second defrosting mode flows to schematic diagram;
Fig. 6 shows the system schematic of the 3rd embodiment of heat pump type air adjusting device of the present invention;
Refrigerant when Fig. 7 shows the refrigerating operaton of the heat pump type air adjusting device of Fig. 6 flows to schematic diagram;
Refrigerant when Fig. 8 shows the heating operation of the heat pump type air adjusting device of Fig. 6 flows to schematic diagram;
The refrigerant that the heat pump type air adjusting device that Fig. 9 shows Fig. 6 is run under the first defrosting mode flows to schematic diagram;
The refrigerant that the heat pump type air adjusting device that Figure 10 shows Fig. 6 is run under the second defrosting mode flows to schematic diagram;
Figure 11 shows the system schematic of the second embodiment of heat pump type air adjusting device of the present invention;
Figure 12 shows the system schematic of the 4th embodiment of heat pump type air adjusting device of the present invention;
Figure 13 shows the system schematic of the 5th embodiment of heat pump type air adjusting device of the present invention; And
Figure 14 shows the system schematic of the 6th embodiment of heat pump type air adjusting device of the present invention.
Detailed description of the invention
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
As Fig. 1 to Fig. 5 shows the first embodiment of heat pump type air adjusting device of the present invention;
The heat pump type air adjusting device of the first embodiment comprise air conditioning major loop, tonifying Qi loop, for carrying out defroster and the refrigerant heater 14 of defrost operation to outdoor heat exchanger 5.Air conditioning major loop comprises the compressor 1, four-way change-over valve 2, outdoor heat exchanger 5, first throttle device 8, flash vessel 9, electric expansion valve 10 and the indoor heat exchanger 13 that are connected in turn by refrigeration pipe.The first interface of four-way change-over valve 2 is communicated with the port of export of compressor 1, the second interface is communicated with outdoor heat exchanger 5, the 3rd interface is communicated with indoor heat exchanger 13, the 4th interface is communicated with the arrival end of compressor 1.Four-way change-over valve 2 has makes heat pump type air adjusting device carry out the first state of refrigerating operaton and make heat pump type air adjusting device carry out the second state of heating operation.Heat pump type air adjusting device adds the refrigerant heater 14 on a refrigeration pipe being series on air conditioning major loop between compressor 1 arrival end and four-way change-over valve 2.The first end of defrosting branch road is arranged on compressor 1 and exports between four-way change-over valve 2, between the second end side disposed in the outdoor heat exchanger 5 and electric expansion valve 10.Particularly, defrosting route is communicated with the bye-pass of its first end and the second end and is arranged on bye-pass and the branch road valve 3 be connected in series and the second throttling arrangement 4 form.Such setting, make the defrosting branch road of this programme only use branch road valve 3 and the second throttling arrangement 4 and connecting line to form, structure is simple.It should be noted that, the reason of the setting of the second throttling arrangement 4 depends on branch road valve 3; If the aperture of branch road valve 3 is enough little, can throttling action be played, then can inapplicable second throttling arrangement 4.
Wherein, electric expansion valve 10 is for free adjustment aperture in the open range of complete shut-down and standard-sized sheet; Refrigerant heater 14 is for heating to refrigerant to promote its energy state.Its embody rule and advantage will obtain imbody in the following description.Preferably, tonifying Qi loop also comprises the check valve 16 be arranged in series with tonifying Qi valve 15.Wherein tonifying Qi valve 15 is two-port valve, and the setting of check valve 16 makes the refrigerant in tonifying Qi loop can only flow to compressor 1 by flash vessel 9.Wherein tonifying Qi valve 15 is two-port valve, and the setting of check valve 16 makes the refrigerant in tonifying Qi loop can only flow to compressor 1 by flash vessel 9.It should be noted that, the reason that check valve is arranged depends on that two-port valve is to the requirement flowed to; If two-port valve is to flowing to no requirement (NR), not needing to arrange check valve, if two-port valve has requirement to the flow direction, then needing to arrange check valve to assist two-port valve.
The heat pump type air adjusting device of the first embodiment is when refrigerating operaton, and branch road valve 3 is closed, and tonifying Qi valve 15 is opened, and four-way change-over valve 2 is in the first state.As shown in Figure 2, refrigerant circulates according to following flow direction: compressor 1 → four-way change-over valve 2 → outdoor heat exchanger 5 → flash vessel 9 → electric expansion valve 10 → indoor heat exchanger 13 → four-way change-over valve 2 → refrigerant heater 14 → compressor 1.Wherein, some refrigerant entered tonifying Qi loop after entering flash vessel 9, then flowed in compressor 1.
The heat pump type air adjusting device of the first embodiment is when heating operation, and branch road valve 3 is closed, and tonifying Qi valve 15 is opened, and four-way change-over valve 2 is in the second state.As shown in Figure 3, refrigerant circulates according to following flow direction: compressor 1 → four-way change-over valve 2 → indoor heat exchanger 13 → electric expansion valve 10 → flash vessel 9 → first throttle device 8 → outdoor heat exchanger 5 → four-way change-over valve 2 → refrigerant heater 14 → compressor 1.Wherein, some refrigerant entered tonifying Qi loop after entering flash vessel 9, then flowed in compressor 1.
In heating process, refrigerant heater 14 can be opened for heating to inspiratory limb refrigerant, promote the enthalpy that compressor sucks refrigerant, promote the mass density that compressor sucks refrigerant, promote heating effect, and suppress outdoor heat exchanger 5 frosting, promote heating capacity, promote and heat comfort level.
The heat pump type air adjusting device of the first embodiment comprises control device.Control device controls heat pump type air adjusting device between different defrost control mode, switches to carry out defrost operation to outdoor heat exchanger 5, and defrost control mode comprises the first defrosting mode and the second defrosting mode.Below two kinds of defrost control mode are specifically described.
First defrosting mode
Under the first defrosting mode, branch road valve 3 is opened, and four-way change-over valve 2 is in the second state, and refrigerant heater 14 is opened.As shown in Figure 4, under the first defrosting mode, refrigerant circulates according to following flow direction: the refrigerant of compressor 1 port of export is divided into refrigerant main flow and refrigerant tributary.Wherein, refrigerant tributary is converged with refrigerant main flow after successively flowing through branch road valve 3 and the second throttling arrangement 4.Refrigerant main flow enter four-way change-over valve 2 and flow through indoor heat exchanger 13, electric expansion valve 10, flash vessel 9 and first throttle device 8 successively and with flow through refrigerant tributary in the branch road that defrosts converge laggard enter outdoor heat exchanger 5, then after flowing through four-way change-over valve 2 and refrigerant heater 14, get back to the arrival end of compressor 1.Wherein, some refrigerant entered tonifying Qi loop after entering flash vessel 9, then flowed in compressor 1.
If control device judges that conditioner needs to enter the first defrosting mode and runs, then according to following policy control:
1: compressor 1 continuous service.Be preferably frequency-changeable compressor in the present embodiment, under the first defrosting mode, generally preferably adopt high frequency to run, such as, make compressor 1 run in the scope of 60 to 120Hz.
2: four-way change-over valve 2 maintains the second state making air conditioning major loop be in heating operation, need not commutate.
3: branch road valve 3 opens conducting, outdoor heat exchanger 5 is delivered to after the hot cold media gas of being discharged by compressor 1 and the cold media gas of electric expansion valve 10 collaborate, to obtain than the refrigerant temperature by outdoor heat exchanger 5 higher during heating operation, thus outdoor heat exchanger 5 is defrosted.
4: the second throttling arrangements 4 are opened conducting due to branch road valve 3 and are also in conducting state, and its effect is that after the hot gas of being discharged by compressor 1 carries out reducing pressure by regulating flow, bypass defrosts to outdoor heat exchanger 5.
5: heat pump type air adjusting device also comprises outside heat exchange blower fan 6.Outside heat exchange blower motor 7 is for heat exchange blower fan 6 outside drive chamber.Control device also comprises the first temperature measuring equipment for detecting outdoor environment temperature, when the first temperature measuring equipment detects that outdoor environment temperature is greater than the first predetermined temperature, outside heat exchange blower fan 6 can be selected to continue to open, and carries out defrosting with the cross-ventilation heat transfer making full use of higher temperature in environment.When the coil temperature of outdoor heat exchanger 5 is greater than a temperature definite value, such as, when being greater than 5 DEG C, heat exchange blower fan 6 outside close chamber can be selected.When the first temperature measuring equipment detects that outdoor environment temperature is lower, when being such as less than or equal to the first predetermined temperature, outside heat exchange blower fan 6 can be chosen as closes immediately, loses to avoid the defrosting heat of outdoor heat exchanger 5 inside.This first predetermined temperature can be such as a value between 4 to 10 DEG C, is preferably 5 DEG C.
6: the aperture of electric expansion valve 10 should guarantee that suitable cold medium flux passes through, enter outdoor heat exchanger 5 and carry out defrosting.
7: heat pump type air adjusting device also comprises indoor heat exchange blower fan 12, indoor heat exchange blower motor 11 is for heat exchange blower fan 12 inside drive chamber.Indoor heat exchange blower fan 12 can cut out according to the coil temperature of indoor heat exchanger 13 and run, or maintain certain wind speed operation, guarantee suitable leaving air temp, guarantee the comfortableness of indoor temperature, and guarantee that a part of heat can enter outdoor heat exchanger and carry out defrosting.Control mode can be particularly, control device also comprises the second temperature measuring equipment of the coil temperature for detecting indoor heat exchanger 13, when the second temperature measuring equipment detects that the coil temperature of indoor heat exchanger 13 is greater than the second predetermined temperature, inside control device control room, heat exchange blower fan 12 is opened.This second predetermined temperature can be such as a value between 40 to 60 DEG C, is preferably 50 DEG C.When the second temperature measuring equipment detects that the coil temperature of indoor heat exchanger 13 is less than the 3rd predetermined temperature, inside control device control room, heat exchange blower fan 12 cuts out, and wherein, the 3rd predetermined temperature should be less than or equal to the second predetermined temperature.3rd predetermined temperature can be in the value of such as between 20 to 40 DEG C, is preferably 30 DEG C.When the second temperature measuring equipment detects that the coil temperature of indoor heat exchanger 13 is between the second predetermined temperature and the 3rd predetermined temperature, inside control device control room, heat exchange blower fan 12 keeps original running status.
8: refrigerant heater 14 is opened, for giving the heating of systemic circulation refrigerant, promoting energy state, accelerating defrosting, and avoiding the risk of compressor Wet Compression, promote the reliability of compressor in defrosting operation process; And realize indoor set continuously heating to run, avoid indoor environment temperature to fluctuate and comfort level reduces.
9: tonifying Qi valve 15 is closed, tonifying Qi loop is not opened.
Second defrosting mode
Under the second defrosting mode, branch road valve 3 is closed, and four-way change-over valve 2 is in the first state, and refrigerant heater 14 cuts out.As shown in Figure 5, under the second defrosting mode, refrigerant circulates according to following flow direction: compressor 1 → four-way change-over valve 2 → outdoor heat exchanger 5 → first throttle device 8 → flash vessel 9 → electric expansion valve 10 → indoor heat exchanger 13 → four-way change-over valve 2 → refrigerant heater 14 → compressor 1.Wherein, some refrigerant entered tonifying Qi loop after entering flash vessel 9, then flowed in compressor 1.
When the outdoor heat exchanger 5 of heat pump type air adjusting device needs defrosting, preferably run under the first defrosting mode.Too low in environment temperature, such as indoor environment temperature is below 20 DEG C, when outdoor environment temperature is below-20 DEG C, or the coil temperature of outdoor heat exchanger 5 can not reach predetermined temperature value experience a period of time under the first defrosting mode after, such as run under the first defrosting mode experience after 8 minutes outdoor heat exchanger coil temperature still can not reach more than 10 DEG C, then according to second defrosting mode run.
In order to control heat pump type air adjusting device from the first defrosting mode to the switching of the second defrosting mode, control device can also comprise the time detection device detecting the operation duration of heat pump type air adjusting device under the first defrosting mode, when time detection device detects that running duration is greater than predetermined amount of time, control device controls heat pump type air adjusting device and switches to the second defrosting mode.Certainly, predetermined amount of time 8 minutes of being not limited to exemplify, such as, also can be a value between 6 to 10 minutes herein.
If control device judges that conditioner needs to enter the second defrosting mode and runs, then according to following policy control:
1: when compressor 1 is frequency-changeable compressor; when entering the second defrosting mode, compressor 1 need through first shutdowns, initial start-up, raising frequency and run at high frequency (such as in the scope of 60 to 120Hz), defrosted after the process that again again starts after shutdown, the pressure balance of system high-low pressure.
2: when entering the second defrosting mode; the first state that four-way change-over valve 2 commutates as making air conditioning major loop refrigerating operaton in a period of time after compressor 1 is shut down for the first time, switches to the second state making air conditioning major loop carry out heating operation after compressor 1 shuts down a period of time again after having defrosted.
3: branch road valve 3 closes to cut off defrosting branch road.
4: outside heat exchange blower fan 6 is shut down after heat pump type air adjusting device enters the second defrosting mode, to prevent the defrosting heat in outdoor heat exchanger 5 to take away.After the second defrosting mode terminates, determine whether open operation according to service condition again.
5: the aperture of electric expansion valve 10 should guarantee that suitable cold medium flux passes through, and guarantees rapid defrosting.
6: in order to prevent lowering room temperature fast in the second defrosting mode, indoor heat exchange blower fan 12 cuts out operation in the second defrosting mode.
7: refrigerant heater 14 cuts out.
8: tonifying Qi valve 15 is closed, tonifying Qi loop is not opened.
In heating process, refrigerant heater 14 is controlled in order to make the heat pump type air adjusting device of the first embodiment, control device also comprises the 3rd temperature measuring equipment of the coil temperature for detecting outdoor heat exchanger 5, when the 3rd temperature measuring equipment detects that the coil temperature of outdoor heat exchanger 5 is less than or equal to predetermined 4th predetermined temperature, defrost control device controls refrigerant heater 14 and opens.4th predetermined temperature can be such as a value between-10 to-3 DEG C, is preferably-5 DEG C.
In addition, when heat pump type air adjusting device heating operation, when the 3rd temperature measuring equipment detect outdoor heat exchanger 5 coil temperature be less than outdoor environment temperature that the first temperature measuring equipment detects exceed predetermined temperature difference time, control device controls refrigerant heater 14 and opens.This predetermined temperature difference can be such as a value between 5 to 15 DEG C, is preferably 10 DEG C.
In addition, when heat pump type air adjusting device heating operation, when the first temperature measuring equipment detects that outdoor environment temperature is less than or equal to the 5th predetermined predetermined temperature, control device controls refrigerant heater 14 and opens.5th predetermined temperature can be such as a value between-5 to 5 DEG C, is preferably 5 DEG C.
It should be noted that, the second defrosting mode is the useful supplement to the first defrosting mode, and its effect is under severe outdoor environmental conditions or strengthens the ability of defrosting when frost situation is more serious.But, those skilled in the art will envision that, even if above conditioner also can only adopt the first defrosting mode to carry out defrost operation, as long as the time long enough of defrost process under rugged environment condition.
According to above description, the heat pump type air adjusting device of the first embodiment, at typical condition, the first defrosting mode of defrosting while heating can be adopted, thus, under, system less at parts and simple, the cost-saving precondition of control mode, substantially realize following effect:
1: owing to can run under the first defrosting mode under common outdoor environmental conditions, the sensible heat of refrigerant namely can be utilized while heating to defrost, there is following advantage:
Four-way change-over valve does not commutate, and compressor is not shut down, and directly the high temperature refrigerant that compressor is discharged is passed into outdoor heat exchanger; thus defrosting can be realized in time rapidly; defrosting can be completed in 8 ~ 10min, because interior pipe temperature during defrosting is higher, after having defrosted, hot blast can be obtained at once.Because of compressor shutdown when adopting traditional defrosting mode, four-way change-over valve commutation and defrosting total time of causing long, a complete defrost process needs general 12 ~ 15min, and even the longer time could obtain hot blast again, larger on the impact of room comfortableness.
The interior pipe of indoor heat exchanger can maintain higher temperature, not only can not absorb the heat in room, when indoor heat exchange fan parking, can be dispelled the heat to room by the mode of free convection, in the process of defrosting, fluctuations in indoor temperature is less, larger to the comfortableness contribution in room; Also can in the process of defrosting heat exchange blower fan inside opening chamber, continue indoor room heat supply.Can avoid in conventional defrost process because the temperature of indoor heat exchanger absorbs the larger fluctuation of indoor temperature that room heat causes below-20 DEG C.
Suction temperature, the pressure of inspiration(Pi) of compressor obtain very fast lifting after entering defrosting, and be not easy to cause compressor hydraulic compression, compressor operating is more reliable.Can avoid in conventional defrost process, the compressor hydraulic compression caused because a large amount of liquid refrigerants accumulates in suction port of compressor place.
2: further, under the condition that outdoor environment is severe, the second defrosting mode (corresponding with conventional defrost pattern) can be switched to and carry out defrost operation, defrosting intensity can be strengthened; Meanwhile, due to the cooperation adopting the second defrosting mode can have the first defrosting mode, thus omnidistancely in defrosting overall process need not adopt the second defrosting mode, the adverse effect of the second defrosting mode can be reduced to the full extent.
According to above description, the heat pump type air adjusting device of the first embodiment, at typical condition, the first defrosting mode of defrosting while heating can be adopted, and under the condition that outdoor environment is severe, the second defrosting mode can be switched to and carry out defrost operation, thus the technique effect that the first embodiment has can be realized.Further, due to refrigerant heater 14 of having connected in air conditioning major loop, therefore, when conditioner needs, refrigerant heater 14 can also be opened and plays the effect accelerating to heat or accelerate to defrost.
It should be noted that, present invention also offers the second embodiment, specifically see Figure 11, the difference of the second embodiment and the first embodiment be only the to defrost first end of branch road is arranged between four-way change-over valve 2 the 3rd interface and indoor heat exchanger 13.Preferably, defrosting branch road also comprises the check valve be connected in series with branch road valve 3, and wherein branch road valve 3 is two-port valve.It should be noted that, the reason that check valve is arranged depends on that two-port valve is to the requirement flowed to; If two-port valve is to flowing to no requirement (NR), not needing to arrange check valve, if two-port valve has requirement to the flow direction, then needing to arrange check valve to assist two-port valve.
But in the air conditioning major loop of the heat pump type air adjusting device of this embodiment, refrigerant flows to all identical with the first embodiment with control mode, can solve problem to be solved equally, reach identical technique effect, no longer carry out repetition herein.
If Fig. 6 is to the 3rd embodiment that Figure 10 shows that heat pump type air adjusting device, its structure and control mode are substantially identical with the first embodiment.Therefore in the following description, the something in common of the two is no longer specifically described, only difference is described.
Be that the setting position of refrigerant heater 14 is different from the difference of the first embodiment in the heat pump type air adjusting device of the 3rd embodiment, in the 3rd embodiment, refrigerant heater 14 is series on the refrigeration pipe in air conditioning major loop between outdoor heat exchanger 5 and first throttle device 8.
The heat pump type air adjusting device of the 3rd embodiment is when refrigerating operaton, and branch road valve 3 is closed, and tonifying Qi valve 15 is opened, and four-way change-over valve 2 is in the first state.As shown in Figure 7, refrigerant circulates according to following flow direction: compressor 1 → four-way change-over valve 2 → outdoor heat exchanger 5 → refrigerant heater 14 → first throttle device 8 → flash vessel 9 → electric expansion valve 10 → indoor heat exchanger 13 → four-way change-over valve 2 → compressor 1.Wherein, some refrigerant entered tonifying Qi loop after entering flash vessel 9, then flowed in compressor 1.
The heat pump type air adjusting device of the 3rd embodiment is when heating operation, and branch road valve 3 is closed, and tonifying Qi valve 15 is opened, and four-way change-over valve 2 is in the second state.As shown in Figure 8, refrigerant circulates according to following flow direction: compressor 1 → four-way change-over valve 2 → indoor heat exchanger 13 → electric expansion valve 10 → flash vessel 9 → first throttle device 8 → refrigerant heater 14 → outdoor heat exchanger 5 → four-way change-over valve 2 → compressor 1.Wherein, some refrigerant entered tonifying Qi loop after entering flash vessel 9, then flowed in compressor 1.
The heat pump type air adjusting device of the 3rd embodiment also comprises control device.Defrost control mode also comprises the first defrosting mode and the second defrosting mode.
Under the first defrosting mode, branch road valve 3 is opened, and four-way change-over valve 2 is in the second state.As shown in Figure 9, refrigerant circulates according to following flow direction: the refrigerant of compressor 1 port of export is divided into refrigerant main flow and refrigerant tributary.Wherein, refrigerant tributary is converged with refrigerant main flow after successively flowing through branch road valve 3 and the second throttling arrangement 4.Refrigerant main flow enter four-way change-over valve 2 and flow through indoor heat exchanger 13, electric expansion valve 10, flash vessel 9, first throttle device 8 and refrigerant heater 14 successively and with flow through refrigerant tributary in the branch road that defrosts converge laggard enter outdoor heat exchanger 5, then after flowing through four-way change-over valve 2, get back to the arrival end of compressor 1.Wherein, some refrigerant entered tonifying Qi loop after entering flash vessel 9, then flowed in compressor 1.
Under the second defrosting mode, branch road valve 3 is closed, and four-way change-over valve 2 is in the first state.As shown in Figure 10, refrigerant circulates according to following flow direction: compressor 1 → four-way change-over valve 2 → outdoor heat exchanger 5 → refrigerant heater 14 → first throttle device 8 → flash vessel 9 → electric expansion valve 10 → indoor heat exchanger 13 → four-way change-over valve 2 → compressor 1.Wherein, some refrigerant entered tonifying Qi loop after entering flash vessel 9, then flowed in compressor 1.
In the first defrosting mode, refrigerant heater 14 can be opened for exporting to indoor set, also be the refrigerant heating of outdoor heat exchanger 5 porch, thus promote the refrigerant temperature entering outdoor heat exchanger 5, accelerate defrosting, and realize indoor set continuously heating to run, avoid indoor environment temperature to fluctuate and comfort level reduces.
In addition in conditioner heating operation, also refrigerant heater 14 can be opened for exporting to indoor set, i.e. outdoor heat exchanger 5 entrance refrigerant heating, promote the refrigerant temperature entered in outdoor heat exchanger 5, promote the mass density that compressor sucks refrigerant, promote heating effect, and suppress outdoor heat exchanger 5 frosting, promote heating capacity, promote and heat comfort level.The condition of opening refrigerant heater 14 is all identical with the first embodiment with control mode.
The heat pump type air adjusting device of the 3rd embodiment is roughly the same with the technique effect of the first embodiment.
As can be seen from the above description, the above embodiments of the present invention achieve following technique effect:
Owing to only arranging a defrosting branch road, or a defrosting branch road is only set and adds the refrigerant heater be arranged in air conditioning major loop, namely can be implemented in the function that outdoor heat exchanger defrosts while heating, thus have that defroster structure is simple, the advantage of low cost of manufacture.
Under common outdoor environmental conditions; can run under the first defrosting mode; and under the first defrosting mode; the sensible heat of refrigerant can be utilized while heating to defrost; there is following advantage: four-way change-over valve does not commutate; compressor is not shut down, and directly the high temperature refrigerant that compressor is discharged is passed into outdoor heat exchanger, thus can realize defrosting in time rapidly.The interior pipe of indoor heat exchanger can maintain higher temperature, not only can not absorb the heat in room, when indoor heat exchange fan parking, can be dispelled the heat to room by the mode of free convection, in the process of defrosting, fluctuations in indoor temperature is less, larger to the comfortableness contribution in room; Also can in the process of defrosting heat exchange blower fan inside opening chamber, continue indoor room heat supply.Suction temperature, the pressure of inspiration(Pi) of compressor obtain very fast lifting after entering defrosting, and be not easy to cause compressor hydraulic compression, compressor operating is more reliable.
Under the condition that outdoor environment temperature is severe, the second defrosting mode (corresponding with conventional defrost pattern) can be adopted to carry out defrosting process, because the cooperation of the first defrosting mode can be had, and in defrost process, whole process need not adopt the second defrosting mode, also can reduce the adverse effect of the second defrosting mode to the full extent.
Further, connect in air conditioning major loop refrigerant heater, also can accelerate heating operations and defrost process.
Present invention also offers the 4th embodiment, specifically see Figure 12, the difference of the 4th embodiment and the 3rd embodiment be only the to defrost first end of branch road is arranged on the pipeline between four-way change-over valve 2 the 3rd interface and indoor heat exchanger 13, and defrosting branch road has been arranged in series check valve.Preferably, defrosting branch road second end can be arranged between refrigerant heater 14 and electric expansion valve 10.Such setting prevents the refrigerant due to the introducing of defrosting branch road from being all gaseous state, after the liquid refrigerants of coming with indoor heat exchanger side mixing, transfers biphase gas and liquid flow to most probably, unfavorable to refrigerant heater.It should be noted that, in the air conditioning major loop of the heat pump type air adjusting device of this embodiment, refrigerant flows to all identical with the 3rd embodiment with control mode, problem to be solved can be solved equally, reach identical technique effect, no longer carry out repetition herein.
Present invention also offers the 5th embodiment, specifically see Figure 13, the difference of the 5th embodiment and the first embodiment is only between refrigerant heater 14 side disposed in the outdoor heat exchanger 5 and four-way change-over valve 2 second interface.It should be noted that, in the air conditioning major loop of the heat pump type air adjusting device of this embodiment, refrigerant flows to all identical with the first embodiment with control mode, even if the position of refrigerant heater is different, but problem to be solved can be solved equally, reach identical technique effect, no longer carry out repetition herein.
Present invention also offers the 6th embodiment, specifically see Figure 14, the difference of the 6th embodiment and the second embodiment is only between refrigerant heater 14 side disposed in the outdoor heat exchanger 5 and four-way change-over valve 2 second interface.In the air conditioning major loop of the heat pump type air adjusting device of this embodiment, refrigerant flows to all identical with the second embodiment with control mode, even if the position of refrigerant heater is different, but problem to be solved can be solved equally, reach identical technique effect, no longer carry out repetition herein.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (16)
1. a heat pump type air adjusting device, comprising:
Air conditioning major loop, described air conditioning major loop comprises the compressor (1) connected in turn by refrigeration pipe, four-way change-over valve (2), outdoor heat exchanger (5), first throttle device (8), flash vessel (9), expansion gear (10) and indoor heat exchanger (13), the first interface of described four-way change-over valve (2) is communicated with the port of export of described compressor (1), second interface is communicated with described outdoor heat exchanger (5), 3rd interface is communicated with described indoor heat exchanger (13), 4th interface is communicated with the arrival end of described compressor (1), described four-way change-over valve (2) have by described first interface and described second orifice and by described 3rd interface and described 4th orifice with make described heat pump type air adjusting device carry out refrigerating operaton the first state and by described first interface and described 3rd orifice and by described second interface and described 4th orifice with the second state making described heat pump type air adjusting device carry out heating operation,
Tonifying Qi loop, one end is connected with described flash vessel (9), and the other end is connected with described compressor (1), and described tonifying Qi loop comprises the tonifying Qi valve (15) connected by pipeline;
Defroster, for carrying out defrost operation to described outdoor heat exchanger (5);
It is characterized in that, described defroster is for having the defrosting branch road of branch road valve (3);
Described heat pump type air adjusting device also comprises refrigerant heater (14), and described refrigerant heater (14) is arranged on described air conditioning major loop;
Described heat pump type air adjusting device also comprises control device, described control device controls described heat pump type air adjusting device between different defrost control mode, switches to carry out defrost operation to described outdoor heat exchanger (5), and described defrost control mode comprises:
First defrosting mode, under described first defrosting mode, described branch road valve (3) is opened, and described four-way change-over valve (2) is in described second state, and described refrigerant heater (14) is opened;
Second defrosting mode, under described second defrosting mode, described branch road valve (3) is closed, and described four-way change-over valve (2) is in described first state, and described refrigerant heater (14) is closed.
2. heat pump type air adjusting device according to claim 1, it is characterized in that, the first end of described defrosting branch road is connected between the port of export of described compressor (1) and described four-way change-over valve (2), the second end is connected between described outdoor heat exchanger (5) and described first throttle device (8).
3. heat pump type air adjusting device according to claim 1, it is characterized in that, the first end of described defrosting branch road is connected between described four-way change-over valve (2) and described indoor heat exchanger (13), the second end is connected between described outdoor heat exchanger (5) and described first throttle device (8).
4. the heat pump type air adjusting device according to Claims 2 or 3, is characterized in that, described defrosting branch road also comprises the second throttling arrangement (4) be connected in series with described branch road valve (3).
5. heat pump type air adjusting device according to claim 4, is characterized in that, described refrigerant heater (14) is arranged between the arrival end of described compressor (1) and described four-way change-over valve (2).
6. heat pump type air adjusting device according to claim 4, is characterized in that, described refrigerant heater (14) is arranged between outdoor heat exchanger (5) and described second throttling arrangement (4).
7. heat pump type air adjusting device according to claim 1, is characterized in that,
Described heat pump type air adjusting device also comprises outside heat exchange blower fan (6);
Described control device also comprises the first temperature measuring equipment for detecting outdoor environment temperature, under described first defrosting mode, when described first temperature measuring equipment detects that described outdoor environment temperature is greater than the first predetermined temperature, described control device controls the unlatching of described outside heat exchange blower fan (6), and when described outdoor environment temperature is less than or equal to described first predetermined temperature, described control device controls the closedown of described outside heat exchange blower fan (6).
8. heat pump type air adjusting device according to claim 1, is characterized in that,
Described heat pump type air adjusting device also comprises indoor heat exchange blower fan (12);
Described control device also comprises the second temperature measuring equipment of the coil temperature for detecting described indoor heat exchanger (13), under described first defrosting mode, when described second temperature measuring equipment detects that the coil temperature of described indoor heat exchanger (13) is more than or equal to the second predetermined temperature, described control device controls the unlatching of described indoor heat exchange blower fan (12), when detecting that the coil temperature of described indoor heat exchanger (13) is less than the 3rd predetermined temperature, described control device controls the closedown of described indoor heat exchange blower fan (12), wherein, described 3rd predetermined temperature is less than or equal to described second predetermined temperature.
9. heat pump type air adjusting device according to claim 8, is characterized in that, described compressor (1) continuous service under described first defrosting mode.
10. heat pump type air adjusting device according to claim 9, it is characterized in that, described compressor (1) is frequency-changeable compressor (1), and under described first defrosting mode, described compressor (1) runs in the scope of 60 to 120Hz.
11. heat pump type air adjusting devices according to claim 1, it is characterized in that, described control device also comprises the time detection device detecting the operation duration of described heat pump type air adjusting device under described first defrosting mode, when described time detection device detects that described operation duration is more than or equal to predetermined amount of time, described control device controls described heat pump type air adjusting device and switches to described second defrosting mode from described first defrosting mode.
12. heat pump type air adjusting devices according to claim 1, it is characterized in that, described control device also comprises the 3rd temperature measuring equipment for detecting described outdoor heat exchanger (5) coil temperature, when described heat pump type air adjusting device heating operation, when described 3rd temperature measuring equipment detects that described outdoor heat exchanger (5) coil temperature is less than or equal to the 4th predetermined temperature, described control device controls the unlatching of described refrigerant heater (14).
13. heat pump type air adjusting devices according to claim 1, it is characterized in that, described control device also comprises the first temperature measuring equipment for detecting outdoor environment temperature and the 3rd temperature measuring equipment for detecting described outdoor heat exchanger (5) coil temperature, when described heat pump type air adjusting device heating operation, when described 3rd temperature measuring equipment detects that the difference that described outdoor heat exchanger (5) coil temperature is less than the described outdoor environment temperature that described first temperature measuring equipment detects exceedes predetermined temperature difference, described control device controls the unlatching of described refrigerant heater (14).
14. heat pump type air adjusting devices according to claim 1, it is characterized in that, described control device also comprises the first temperature measuring equipment for detecting outdoor environment temperature, when described heat pump type air adjusting device heating operation, when described first temperature measuring equipment detects that described outdoor environment temperature is less than or equal to the 5th temperature, described control device controls the unlatching of described refrigerant heater (14).
15. heat pump type air adjusting devices according to claim 1, is characterized in that, described tonifying Qi loop also comprises the check valve (16) be arranged in series with described tonifying Qi valve (15).
16. heat pump type air adjusting devices according to claim 3, is characterized in that, described defrosting branch road also comprises the second throttling arrangement (4) and check valve that are connected in series with described branch road valve (3).
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| CN104729161B (en) * | 2013-12-19 | 2018-08-24 | 珠海格力电器股份有限公司 | Air conditioner and its control method |
| CN103983037B (en) * | 2014-04-22 | 2016-08-24 | 珠海格力电器股份有限公司 | The Two-stage Compression air conditioning system of band defrosting function |
| CN104061705B (en) * | 2014-06-12 | 2017-03-15 | 珠海格力电器股份有限公司 | Two-stage Compression air-conditioning system and its control method |
| CN104567099B (en) * | 2014-12-22 | 2018-11-27 | 广东美的制冷设备有限公司 | air conditioner |
| CN104676839B (en) * | 2015-02-28 | 2017-08-29 | 广东美的制冷设备有限公司 | The control method and device of outdoor fan in detachable air conditioner |
| CN106369877A (en) * | 2016-11-30 | 2017-02-01 | 广东美的制冷设备有限公司 | Heat pump system and defrosting control method thereof |
| CN109654764A (en) * | 2019-01-28 | 2019-04-19 | 奥克斯空调股份有限公司 | A kind of two-stage enthalpy increasing system and its defrosting control method |
| CN110454917A (en) * | 2019-08-23 | 2019-11-15 | 四川长虹空调有限公司 | Low ambient temperature air-source heat-pump air heater defrosting tonifying Qi electromagnetic valve control method |
| CN110736209B (en) * | 2019-09-26 | 2022-04-15 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN110736213B (en) * | 2019-09-27 | 2021-11-23 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN111076363A (en) * | 2019-12-24 | 2020-04-28 | 珠海格力电器股份有限公司 | Control method and device of air conditioner, air conditioning system, storage medium and processor |
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