CN103363709A - Heat pump type air conditioner - Google Patents
Heat pump type air conditioner Download PDFInfo
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- CN103363709A CN103363709A CN2012101021580A CN201210102158A CN103363709A CN 103363709 A CN103363709 A CN 103363709A CN 2012101021580 A CN2012101021580 A CN 2012101021580A CN 201210102158 A CN201210102158 A CN 201210102158A CN 103363709 A CN103363709 A CN 103363709A
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- 238000010257 thawing Methods 0.000 claims abstract description 148
- 239000003507 refrigerant Substances 0.000 claims abstract description 124
- 238000010438 heat treatment Methods 0.000 claims abstract description 43
- 238000004378 air conditioning Methods 0.000 claims abstract description 30
- 238000005057 refrigeration Methods 0.000 claims abstract description 8
- 238000001514 detection method Methods 0.000 claims description 19
- 230000001502 supplementing effect Effects 0.000 abstract 3
- 238000000034 method Methods 0.000 description 26
- 230000008569 process Effects 0.000 description 19
- 230000000694 effects Effects 0.000 description 15
- 230000006835 compression Effects 0.000 description 8
- 238000007906 compression Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 8
- 230000008901 benefit Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000001839 systemic circulation Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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Abstract
The present invention provides a heat pump type air conditioning apparatus, including: the air conditioning main loop comprises a compressor, a four-way reversing valve, an outdoor heat exchanger, a first throttling device, a flash evaporator, an expansion device and an indoor heat exchanger which are sequentially connected through a refrigeration pipeline, wherein a first interface of the four-way reversing valve is communicated with an outlet end of the compressor, a second interface of the four-way reversing valve is communicated with the outdoor heat exchanger, a third interface of the four-way reversing valve is communicated with the indoor heat exchanger, a fourth interface of the four-way reversing valve is communicated with an inlet end of the compressor, one end of an air supplementing loop is connected with the flash evaporator, the other end of the air supplementing loop is connected with the compressor, and the air supplementing loop comprises an; the defrosting device is used for defrosting the outdoor heat exchanger; the defrosting device is a defrosting branch with a branch valve; the heat pump type air conditioning device further comprises a refrigerant heating device, and the refrigerant heating device is arranged on the air conditioning main loop. The heat pump type air conditioning device has timely defrosting and simple structure.
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 the Two-stage Compression technology, the Two-stage Compression technology is carried 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 must be by again excessively cold when flowing through flash vessel, the refrigerant that namely flows into outdoor heat exchanger must be in temperature lower compared to the single stage compress technology, and its frosting situation can be more serious, frequent so.Traditional Defrost mode is at the air-conditioning heating running, four-way change-over valve switches to the kind of refrigeration cycle flow process, allow the refrigerant of the HTHP that compressor discharges be drained in the outdoor heat exchanger through four-way change-over valve, to melt frost layer or the ice sheet on the air conditioner room outdoor heat exchanger.Traditional Defrost mode at first 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 defrosting was finished, compressor was stagnated a period of time again, and then four-way change-over valve commutates again, heats.After compressor was opened a period of time, inner tube temperature rise to uniform temperature just can obtain hot blast.This process approximately needs 12～15min even longer, can not in time defrost.
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 defrosts timely and simple in structure.
To achieve these goals, according to an aspect of the present invention, a kind of heat pump type air adjusting device is provided, comprise: the air conditioning major loop, the air conditioning major loop comprises the compressor that connects in turn by refrigeration pipe, four-way change-over valve, outdoor heat exchanger, the 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, the second interface is communicated with outdoor heat exchanger, the 3rd interface is communicated with indoor heat exchanger, the 4th interface is communicated with the arrival end of compressor, and four-way change-over valve has and first interface and the second interface is communicated with and the 3rd interface and the 4th interface is communicated with so that the heat pump type air adjusting device is carried out the first state of refrigerating operaton and with first interface with the 3rd interface is communicated with and the second interface and the 4th interface are communicated with so that the heat pump type air adjusting device is carried out the second state of heating operation; The tonifying Qi loop, an end is connected with flash vessel, and the other end is connected with compressor, and the tonifying Qi loop comprises the tonifying Qi valve that connects by pipeline; Defroster is used for outdoor heat exchanger is carried out defrost operation; Stating defroster is the defrosting branch road with branch road valve; The heat pump type air adjusting device also comprises the refrigerant heater, and the refrigerant heater is arranged on the air conditioning major loop.
Further, the first end of defrosting branch road is connected between the port of export and four-way change-over valve of compressor, the second end is connected between outdoor heat exchanger and the first throttle device.
Further, the defrosting branch road first end be connected between four-way change-over valve and the indoor heat exchanger, the second end is connected to outdoor heat exchanger and the first throttle device between.
Further, the defrosting branch road also comprises the second throttling arrangement that is connected in series with the branch road valve.
Further, the refrigerant heater is arranged between the arrival end and four-way change-over valve of compressor.
Further, the refrigerant heater is arranged between outdoor heat exchanger and the second throttling arrangement.
Further, the heat pump type air adjusting device also comprises control device, control device control heat pump type air adjusting device is switched so that outdoor heat exchanger is carried out defrost operation between different defrosting control models, the defrosting control model comprises: the first defrosting mode, under the first defrosting mode, valve open, four-way change-over valve are in the second state, and the refrigerant heater is opened; The second defrosting mode, under the second defrosting mode, valve closing, four-way change-over valve are in the first state, and the refrigerant heater cuts out.
Further, the heat pump type air adjusting device also comprises outside heat exchange blower fan; Control device also comprises the first temperature measuring equipment for detection of outdoor environment temperature, under the first defrosting mode, when the first temperature measuring equipment detects outdoor environment temperature greater than the first predetermined temperature, control device control room outside heat exchange blower fan is opened, and outdoor environment temperature is less than or equal to the first predetermined temperature timed unit control room outside heat exchange blower fan and closes.
Further, the heat pump type air adjusting device also comprises indoor heat exchange blower fan; Control device also comprises the second temperature measuring equipment for detection of the coil temperature of indoor heat exchanger, under the first defrosting mode, the coil temperature that detects indoor heat exchanger when the second temperature measuring equipment is during more than or equal to the second predetermined temperature, the inboard heat exchange blower fan in control device control room is opened, the coil temperature that detects indoor heat exchanger is during less than the 3rd predetermined temperature, the inboard heat exchange blower fan in control device control room cuts out, and wherein, the 3rd predetermined temperature is less than or equal to the second predetermined temperature.
Further, at the first defrosting mode lower compression machine continuous service.
Further, compressor is frequency-changeable compressor, moves in 60 to 120Hz scope at the first defrosting mode lower compression machine.
Further, control device also comprises the time detection device that detects the operation duration of heat pump type air adjusting device under the first defrosting mode, when the time checkout gear detected the operation duration more than or equal to predetermined amount of time, control device control heat pump type air adjusting device switched to the second defrosting mode from the first defrosting mode.
Further, control device also comprises the 3rd temperature measuring equipment for detection of the outdoor heat exchanger coil temperature, when heat pump type air adjusting device heating operation, when the 3rd temperature measuring equipment detected the outdoor heat exchanger coil temperature and is less than or equal to the 4th predetermined temperature, control device control refrigerant heater was opened.
Further, control device also comprises for detection of the first temperature measuring equipment of outdoor environment temperature with for detection of the 3rd temperature measuring equipment of outdoor heat exchanger coil temperature, when heat pump type air adjusting device heating operation, when the difference that detects the outdoor environment temperature that the outdoor heat exchanger coil temperature detects less than the first temperature measuring equipment when the 3rd temperature measuring equipment surpassed the predetermined temperature difference, control device control refrigerant heater was opened.
Further, control device also comprises the first temperature measuring equipment for detection of outdoor environment temperature, when heat pump type air adjusting device heating operation, when the first temperature measuring equipment detected outdoor environment temperature and is less than or equal to the 5th temperature, control device control refrigerant heater was opened.
Further, the tonifying Qi loop also comprises the check valve of connecting and arranging with the tonifying Qi valve.
Further, the defrosting branch road also comprises the second throttling arrangement and the check valve that is connected in series with the branch road valve.
Use technical scheme of the present invention, the heat pump type air adjusting device, comprise: the air conditioning major loop, the air conditioning major loop comprises the compressor that connects in turn by refrigeration pipe, four-way change-over valve, outdoor heat exchanger, the 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, the second interface is communicated with outdoor heat exchanger, the 3rd interface is communicated with indoor heat exchanger, the 4th interface is communicated with the arrival end of compressor, and four-way change-over valve has and first interface and the second interface is communicated with and the 3rd interface and the 4th interface is communicated with so that the heat pump type air adjusting device is carried out the first state of refrigerating operaton and with first interface with the 3rd interface is communicated with and the second interface and the 4th interface are communicated with so that the heat pump type air adjusting device is carried out the second state of heating operation; The tonifying Qi loop, an end is connected with flash vessel, and the other end is connected with compressor, and the tonifying Qi loop comprises the tonifying Qi valve that connects by pipeline; Defroster is used for outdoor heat exchanger is carried out defrost operation; Stating defroster is the defrosting branch road with branch road valve; The heat pump type air adjusting device also comprises the refrigerant heater, and the refrigerant heater is arranged on the air conditioning major loop.The heat pump type air adjusting device can be utilized the sensible heat of refrigerant to carry out defrost compressor when heating and not shut down under the first defrosting mode, and the high temperature refrigerant of directly compressor being discharged passes into outdoor heat exchanger, thereby can in time realize rapidly defrosting; Under the second defrosting mode, can strengthen defrosting intensity.
Description of drawings
The Figure of description that consists of the application's a part is used to provide a further understanding of the present invention, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction 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 heat pump type air adjusting device of Fig. 1 flows to schematic diagram;
Refrigerant when Fig. 3 shows the heating operation of heat pump type air adjusting device of Fig. 1 flows to schematic diagram;
Fig. 4 shows the refrigerant that the heat pump type air adjusting device of Fig. 1 moves and flows to schematic diagram under the first defrosting mode;
Fig. 5 shows the refrigerant that the heat pump type air adjusting device of Fig. 1 moves and flows to schematic diagram under the second defrosting mode;
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 heat pump type air adjusting device of Fig. 6 flows to schematic diagram;
Refrigerant when Fig. 8 shows the heating operation of heat pump type air adjusting device of Fig. 6 flows to schematic diagram;
Fig. 9 shows the refrigerant that the heat pump type air adjusting device of Fig. 6 moves and flows to schematic diagram under the first defrosting mode;
Figure 10 shows the refrigerant that the heat pump type air adjusting device of Fig. 6 moves and flows to schematic diagram under the second defrosting mode;
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.
The specific embodiment
Need to prove, in the situation that do not conflict, embodiment and the feature among the embodiment among the application can make up mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the present invention in detail.
Show the first embodiment of heat pump type air adjusting device of the present invention such as Fig. 1 to Fig. 5;
The heat pump type air adjusting device of the first embodiment comprises air conditioning major loop, tonifying Qi loop, is used for outdoor heat exchanger 5 is carried out defroster and the refrigerant heater 14 of defrost operation.The air conditioning major loop comprises 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 connects 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 have make the heat pump type air adjusting device carry out refrigerating operaton the first state and make the heat pump type air adjusting device carry out the second state of heating operation.The heat pump type air adjusting device has increased by one and has been series at the refrigerant heater 14 on the refrigeration pipe between compressor 1 arrival end and four-way change-over valve 2 on the air conditioning major loop.The first end of defrosting branch road is arranged between compressor 1 outlet and the four-way change-over valve 2, the second end is arranged between outdoor heat exchanger 5 and the electric expansion valve 10.Particularly, a defrosting route is communicated with the bye-pass and the branch road valve 3 that is arranged on the bye-pass and is connected in series and the second throttling arrangement 4 compositions of its first end and the second end.Such setting makes the defrosting branch road of this programme only use branch road valve 3 and the second throttling arrangement 4 and connecting line to consist of, and is simple in structure.Need to prove, 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 play throttling action, then can inapplicable the second throttling arrangement 4.
Wherein, electric expansion valve 10 is used for free adjustment aperture in the aperture scope of complete shut-down and standard-sized sheet; Refrigerant heater 14 is used for heating to promote its energy state to refrigerant.Its concrete application and advantage will obtain imbody in the following description.Preferably, the tonifying Qi loop also comprises the check valve 16 of connecting and arranging 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 the tonifying Qi loop 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 the tonifying Qi loop flow to compressor 1 by flash vessel 9.Need to prove, the reason of check valve setting depends on the requirement of two-port valve to flowing to; If two-port valve to flowing to no requirement (NR) then do not need to arrange check valve, if two-port valve has requirement to the flow direction, needs that then check valve is set and assists 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 the tonifying Qi loop after advancing flash vessel 9, flowed in the compressor 1 again.
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 → flash vessel 9 → first throttle device 8 → electric expansion valve 10 → outdoor heat exchanger 5 → four-way change-over valve 2 → refrigerant heater 14 → compressor 1.Wherein, some refrigerant entered the tonifying Qi loop after advancing flash vessel 9, flowed in the compressor 1 again.
In heating process, can open refrigerant heater 14 is used for to air-breathing section refrigerant heating, promote the enthalpy that compressor sucks refrigerant, promote the mass density that compressor sucks refrigerant, promote heating effect, and suppress outdoor heat exchanger 5 frostings, promote heating capacity, promote and heat comfort level.
The heat pump type air adjusting device of the first embodiment comprises control device.Control device control heat pump type air adjusting device switches that outdoor heat exchanger 5 is carried out defrost operation between different defrosting control models, the defrosting control model comprises the first defrosting mode and the second defrosting mode.Below to two kinds the defrosting control models be specifically described.
The 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, successively flowing through behind branch road valve 3 and the second throttling arrangement 4 in the refrigerant tributary, converges with the refrigerant main flow.The refrigerant main flow enter four-way change-over valve 2 and flow through successively indoor heat exchanger 13, electric expansion valve 10, flash vessel 9 and first throttle device 8 and with the defrosting branch road of flowing through in the refrigerant tributary converge the laggard outside heat exchanger 5 that enters, get back to the arrival end of compressor 1 behind flow through again four-way change-over valve 2 and the refrigerant heater 14.Wherein, some refrigerant entered the tonifying Qi loop after advancing flash vessel 9, flowed in the compressor 1 again.
If control device is judged conditioner and need to be entered the operation of the first defrosting mode, then according to following policy control:
1: compressor 1 continuous service.Be preferably in the present embodiment frequency-changeable compressor, under the first defrosting mode, preferably adopt generally speaking the high frequency operation, compressor 1 is moved in 60 to 120Hz scope.
2: four-way change-over valve 2 maintains the second state that makes the air conditioning major loop be in heating operation, need not commutate.
3: branch road valve 3 is opened conducting, the hot cold media gas that compressor 1 is discharged is delivered to outdoor heat exchanger 5 after collaborating with the cold media gas of electric expansion valve 10, the higher refrigerant temperature that passes through outdoor heat exchanger 5 when obtaining than heating operation, thus outdoor heat exchanger 5 is defrosted.
5: the heat pump type air adjusting device also comprises outside heat exchange blower fan 6.Outside heat exchange blower motor 7 is used for drive chamber's outside heat exchange blower fan 6.Control device also comprises the first temperature measuring equipment for detection of outdoor environment temperature, when the first temperature measuring equipment detects outdoor environment temperature greater than the first predetermined temperature, outside heat exchange blower fan 6 can be selected to continue to open, and conducts heat with the cross-ventilation that takes full advantage of higher temperature in the environment and carries out defrosting.When the coil temperature of outdoor heat exchanger 5 greater than a temperature definite value, during for example greater than 5 ℃, can select close chamber's outside heat exchange blower fan 106.When the first temperature measuring equipment detects in the lower situation of outdoor environment temperature, when being less than or equal to the first predetermined temperature, outside heat exchange blower fan 6 can be chosen as immediately closes, to avoid the defrosting thermal loss of outdoor heat exchanger 5 inside.This first predetermined temperature for example can be a value between 4 to 10 ℃, is preferably 5 ℃.
6: the aperture of electric expansion valve 10 should guarantee that suitable cold medium flux passes through, and enters outdoor heat exchanger 5 and carries out defrosting.
7: the heat pump type air adjusting device also comprises indoor heat exchange blower fan 12, and indoor heat exchange blower motor 11 is used for the inboard heat exchange blower fan 12 of drive chamber.Indoor heat exchange blower fan 12 can cut out operation according to the coil temperature of indoor heat exchanger 13, or keep certain wind speed and move, 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.Particularly control mode can for, control device also comprises the second temperature measuring equipment for detection of the coil temperature of indoor heat exchanger 13, the coil temperature that detects indoor heat exchanger 13 when the second temperature measuring equipment is during greater than the second predetermined temperature, and the inboard heat exchange blower fan 12 in control device control room is opened.This second predetermined temperature for example can be a value between 40 to 60 ℃, is preferably 50 ℃.The coil temperature that detects indoor heat exchanger 13 when the second temperature measuring equipment is during less than the 3rd predetermined temperature, and the inboard heat exchange blower fan 12 in control device control room cuts out, and wherein, the 3rd predetermined temperature should be less than or equal to the second predetermined temperature.The 3rd predetermined temperature can be in a for example value between 20 to 40 ℃, is preferably 30 ℃.The coil temperature that detects indoor heat exchanger 13 when the second temperature measuring equipment is between the second predetermined temperature and the 3rd predetermined temperature the time, and the inboard heat exchange blower fan 12 in control device control room keeps original running status.
8: refrigerant heater 14 is opened, and is used for promoting energy state to the heating of systemic circulation refrigerant, accelerates defrosting, and avoids the risk of compressor Wet Compression, promotes the reliability of compressor in the defrosting operation process; And realize the operation of indoor set continuously heating, avoid the indoor environment temperature fluctuation and the comfort level reduction.
9: tonifying Qi valve 15 is closed, and does not open in the tonifying Qi loop.
The 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 the tonifying Qi loop after advancing flash vessel 9, flowed in the compressor 1 again.
When the outdoor heat exchanger 5 of heat pump type air adjusting device needs defrosting, preferably under the first defrosting mode, move.Excessively low in environment temperature, such as indoor environment temperature below 20 ℃, outdoor environment temperature is below-20 ℃ the time, perhaps the coil temperature of outdoor heat exchanger 5 can not reach predetermined temperature value after experience a period of time under the first defrosting mode, for example the outdoor heat exchanger coil temperature still can not reach more than 10 ℃ after operation is experienced 8 minutes under the first defrosting mode, then moves according to the second defrosting mode.
In order to control the switching of heat pump type air adjusting device from the first defrosting mode to the second defrosting mode, control device can also comprise the time detection device that detects the operation duration of heat pump type air adjusting device under the first defrosting mode, when the time checkout gear detected the operation duration greater than predetermined amount of time, control device control heat pump type air adjusting device switched to the second defrosting mode.Certainly, 8 minutes of being not limited to exemplify of predetermined amount of time for example also can be values between 6 to 10 minutes herein.
If control device is judged conditioner and need to be entered the operation of the second defrosting mode, then according to following policy control:
1: in the situation that compressor 1 is frequency-changeable compressor; when entering the second defrosting mode, the process that compressor 1 needs through first shutdown, initial start-up, raising frequency and again shuts down after high frequency (for example in 60 to 120Hz scope) operation, defrosting are finished, again starts after system's high-low pressure pressure balance.
2: when entering the second defrosting mode; four-way change-over valve 2 commutates as making the first state of air conditioning major loop refrigerating operaton in a period of time after compressor 1 first the shutdown, switches to after defrosting is finished to make the air conditioning major loop carry out the second state of heating operation after compressor 1 is shut down a period of time again.
3: branch road valve 3 closes to cut off the defrosting branch road.
4: outside heat exchange blower fan 6 is shut down after the heat pump type air adjusting device enters the second defrosting mode, the defrosting heats in the outdoor heat exchanger 5 is taken away preventing.After finishing, the second defrosting mode determines whether to 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 fast room temperature 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, and does not open in the tonifying Qi loop.
For the heat pump type air adjusting device that makes the first embodiment is controlled refrigerant heater 14 in heating process, control device also comprises the 3rd temperature measuring equipment for detection of the coil temperature of outdoor heat exchanger 5, when the coil temperature that detects outdoor heat exchanger 5 when the 3rd temperature measuring equipment was less than or equal to predetermined the 4th predetermined temperature, defrosting control device control refrigerant heater 14 was opened.The 4th predetermined temperature for example can be a value between-10 to-3 ℃, is preferably-5 ℃.
In addition, when heat pump type air adjusting device heating operation, when the 3rd temperature measuring equipment detected outdoor environment temperature that outdoor heat exchanger 5 coil temperatures detect less than the first temperature measuring equipment and surpasses the predetermined temperature difference, control device control refrigerant heater 14 was opened.This predetermined temperature difference for example can be a value between 5 to 15 ℃, is preferably 10 ℃.
In addition, when heat pump type air adjusting device heating operation, when the first temperature measuring equipment detected outdoor environment temperature and is less than or equal to the 5th predetermined predetermined temperature, control device control refrigerant heater 14 was opened.The 5th predetermined temperature for example can be a value between-5 to 5 ℃, is preferably 5 ℃.
Need to prove, the second defrosting mode is that the useful of the first defrosting mode replenished, and its effect is under the abominable outdoor environmental conditions or strengthen the ability of defrosting in the more serious situation of frost situation.But, those skilled in the art will envision that, even above conditioner also can only adopt the first defrosting mode to carry out defrost operation under the rugged environment condition, as long as the time long enough of defrost process.
According to above description, the heat pump type air adjusting device of the first embodiment is under usual conditions, can adopt the first defrosting mode of defrosting when heating, thereby, system less at parts and control mode be simple, save under the precondition of cost, substantially is achieved as follows effect:
1: owing to can under the first defrosting mode, move under the common outdoor environmental conditions, namely can when heating, utilize the sensible heat of refrigerant to defrost, have following advantage:
Four-way change-over valve does not commutate, and compressor is not shut down, and the high temperature refrigerant of directly compressor being discharged passes into outdoor heat exchanger; thereby can in time realize rapidly defrosting; can finish defrosting in 8～10min, the inner tube temperature is higher during owing to defrosting, can obtain hot blast after defrosting is finished at once.Because of compressor shutdown, four-way change-over valve commutation and defrosting total time of causing are long when adopting traditional defrosting mode, and a complete defrost process needs general 12～15min even longer time could again obtain hot blast, and is larger on the impact of room comfortableness.
The inner tube of indoor heat exchanger can maintain higher temperature, not only can not absorb the heat in room, when indoor heat exchange fan parking, can dispel the heat to the room by the mode of free convection, in the process of defrosting, fluctuations in indoor temperature is less, and is larger to the comfortableness contribution in room; Also can be in the process of defrosting the inboard heat exchange blower fan of opening chamber, continue the indoor room heat supply.Can avoid in traditional defrost process the larger fluctuation of indoor temperature that absorbing the room heat below-20 ℃ and cause because of the temperature of indoor heat exchanger.
The suction temperature of compressor, pressure of inspiration(Pi) obtain very fast the lifting after entering defrosting, be not easy to cause the compressor hydraulic compression, and compressor operating is more reliable.Can avoid in traditional defrost process, because a large amount of liquid refrigerants accumulates in the compressor hydraulic compression that the place, suction port of compressor causes.
2: further, under the abominable condition of outdoor environment, can switch to the second defrosting mode (corresponding with traditional defrosting mode) and carry out defrost operation, can strengthen defrosting intensity; Simultaneously owing to adopting the second defrosting mode that the cooperation of the first defrosting mode can be arranged, thereby needn't be in the defrosting overall process whole process using the second defrosting mode, can reduce to the full extent the adverse effect of the second defrosting mode.
According to above description, the heat pump type air adjusting device of the first embodiment, under usual conditions, can adopt the first defrosting mode of defrosting when heating, and under the abominable condition of outdoor environment, can switch to the second defrosting mode and carry out defrost operation, thereby can realize the technique effect that the first embodiment has.Further, because therefore the refrigerant heater 14 of having connected in the air conditioning major loop, can also when conditioner need, be opened refrigerant heater 14 and be played the effect that quickening heats or accelerates to defrost.
Of particular note, the present invention also provides the second embodiment, and specifically referring to Figure 11, the difference of the second embodiment and the first embodiment only be the to defrost first end of branch road is arranged between four-way change-over valve 2 the 3rd interface and the indoor heat exchanger 13.Preferably, the defrosting branch road also comprises the check valve that is connected in series with branch road valve 3, and wherein branch road valve 3 is two-port valve.Need to prove, the reason of check valve setting depends on the requirement of two-port valve to flowing to; If two-port valve to flowing to no requirement (NR) then do not need to arrange check valve, if two-port valve has requirement to the flow direction, needs that then check valve is set and assists two-port valve.
But the refrigerant flow direction is all identical with the first embodiment with control mode in the air conditioning major loop of the heat pump type air adjusting device of this embodiment, can solve problem to be solved equally, reaches identical technique effect, no longer carries out repetition herein.
To the 3rd embodiment that Figure 10 shows that the heat pump type air adjusting device, its structure is basically identical with the first embodiment with control mode such as Fig. 6.Therefore in the following description, the two something in common is no longer specifically described, only difference is described.
Be that from the difference of the first embodiment the setting position of refrigerant heater 14 is different in the heat pump type air adjusting device of the 3rd embodiment, refrigerant heater 14 is series in the air conditioning major loop on the refrigeration pipe between the outdoor heat exchanger 5 and first throttle device 8 among the 3rd embodiment.
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 the tonifying Qi loop after advancing flash vessel 9, flowed in the compressor 1 again.
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 → flash vessel 9 → first throttle device 8 → electric expansion valve 10 → refrigerant heater 14 → outdoor heat exchanger 5 → four-way change-over valve 2 → compressor 1.Wherein, some refrigerant entered the tonifying Qi loop after advancing flash vessel 9, flowed in the compressor 1 again.
The heat pump type air adjusting device of the 3rd embodiment also comprises control device.The defrosting control model 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, successively flowing through behind branch road valve 3 and the second throttling arrangement 4 in the refrigerant tributary, converges with the refrigerant main flow.The refrigerant main flow enter four-way change-over valve 2 and flow through successively indoor heat exchanger 13, electric expansion valve 10, flash vessel 9, first throttle device 8 and refrigerant heater 14 and with the defrosting branch road of flowing through in the refrigerant tributary converge the laggard outside heat exchanger 5 that enters, get back to the arrival end of compressor 1 behind the four-way change-over valve 2 of flowing through again.Wherein, some refrigerant entered the tonifying Qi loop after advancing flash vessel 9, flowed in the compressor 1 again.
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 the tonifying Qi loop after advancing flash vessel 9, flowed in the compressor 1 again.
In the first defrosting mode, can open refrigerant heater 14 is used for exporting to indoor set, it also is the refrigerant heating of outdoor heat exchanger 5 porch, thereby promote the refrigerant temperature that enters outdoor heat exchanger 5, accelerate defrosting, and realize the operation of indoor set continuously heating, avoid the indoor environment temperature fluctuation and the comfort level reduction.
In addition in the conditioner heating operation, also can open refrigerant heater 14 is used for exporting to indoor set, be the heating of outdoor heat exchanger 5 entrance refrigerants, lifting enters the refrigerant temperature in the outdoor heat exchanger 5, promote the mass density that compressor sucks refrigerant, promote heating effect, and suppress outdoor heat exchanger 5 frostings, 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 and the technique effect of the first embodiment are roughly the same.
As can be seen from the above description, the above embodiments of the present invention have realized following technique effect:
Because a defrosting branch road only being set, a defrosting branch road perhaps only is set adds the refrigerant heater that is arranged in the air conditioning major loop, namely can realize the function that when heating, outdoor heat exchanger defrosted, thereby have advantages of that defroster is simple in structure, low cost of manufacture.
Under the common outdoor environmental conditions; can under the first defrosting mode, move; and under the first defrosting mode; can when heating, utilize the sensible heat of refrigerant to defrost; have following advantage: four-way change-over valve does not commutate; compressor is not shut down, and the high temperature refrigerant of directly compressor being discharged passes into outdoor heat exchanger, thereby can in time realize rapidly defrosting.The inner tube of indoor heat exchanger can maintain higher temperature, not only can not absorb the heat in room, when indoor heat exchange fan parking, can dispel the heat to the room by the mode of free convection, in the process of defrosting, fluctuations in indoor temperature is less, and is larger to the comfortableness contribution in room; Also can be in the process of defrosting the inboard heat exchange blower fan of opening chamber, continue the indoor room heat supply.The suction temperature of compressor, pressure of inspiration(Pi) obtain very fast the lifting after entering defrosting, be not easy to cause the compressor hydraulic compression, and compressor operating is more reliable.
Under the abominable condition of outdoor environment temperature, can adopt the second defrosting mode (corresponding with traditional defrosting mode) processing that defrosts, because the cooperation of the first defrosting mode can be arranged, and needn't be in defrost process whole process using the second defrosting mode, also can reduce to the full extent the adverse effect of the second defrosting mode.
Further, in the situation that series connection refrigerant heater in the air conditioning major loop also can be accelerated the process that heats and defrost process.
The present invention also provides the 4th embodiment, specifically referring to Figure 12, the difference of the 4th embodiment and the 3rd embodiment only be the to defrost first end of branch road is arranged on the pipeline between four-way change-over valve 2 the 3rd interface and the indoor heat exchanger 13, and series connection is provided with check valve on the defrosting branch road.Preferably, defrosting branch road the second end can be arranged between refrigerant heater 14 and the electric expansion valve 10.Arrange like this and prevent because the refrigerant that the defrosting branch road is introduced all is gaseous state, after the liquid refrigerants of coming with the indoor heat exchanger side mixes, transfer most probably biphase gas and liquid flow to, unfavorable to the refrigerant heater.Of particular note, refrigerant flows to all identical with the 3rd embodiment with control mode in the air conditioning major loop of the heat pump type air adjusting device of this embodiment, can solve problem to be solved equally, reach identical technique effect, no longer carry out repetition herein.
The present invention also provides the 5th embodiment, and specifically referring to Figure 13, the difference of the 5th embodiment and the first embodiment only is that refrigerant heater 14 is arranged between outdoor heat exchanger 5 and four-way change-over valve 2 second interfaces.Of particular note, refrigerant flows to all identical with the first embodiment with control mode in the air conditioning major loop of the heat pump type air adjusting device of this embodiment, even the position of refrigerant heater is different, but can solve problem to be solved equally, reach identical technique effect, no longer carry out repetition herein.
The present invention also provides the 6th embodiment, and specifically referring to Figure 14, the difference of the 6th embodiment and the second embodiment only is that refrigerant heater 14 is arranged between outdoor heat exchanger 5 and four-way change-over valve 2 second interfaces.Refrigerant flows to all identical with the second embodiment with control mode in the air conditioning major loop of the heat pump type air adjusting device of this embodiment, even the position of refrigerant heater is different, but can solve problem to be solved equally, reach identical technique effect, no longer carry out repetition herein.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and 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 modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (17)
1. heat pump type air adjusting device comprises:
The air conditioning major loop, described air conditioning major loop comprises the compressor (1) that connects 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), the second interface is communicated with described outdoor heat exchanger (5), the 3rd interface is communicated with described indoor heat exchanger (13), the 4th interface is communicated with the arrival end of described compressor (1), described four-way change-over valve (2) have described first interface and described the second interface is communicated with and will described the 3rd interface and described the 4th interface be communicated with so that described heat pump type air adjusting device carry out refrigerating operaton the first state and with described first interface and described the 3rd interface is communicated with and with described the second interface and the connection of described the 4th interface so that described heat pump type air adjusting device is carried out the second state of heating operation;
The tonifying Qi loop, an 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) that connects by pipeline;
Defroster is used for described outdoor heat exchanger (5) is carried out defrost operation;
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 the described air conditioning major loop.
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 and described four-way change-over valve (2) of described compressor (1), the second end is connected between described outdoor heat exchanger (5) and the 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 the described indoor heat exchanger (13), the second end is connected between described outdoor heat exchanger (5) and the described first throttle device (8).
4. according to claim 2 or 3 described heat pump type air adjusting devices, it is characterized in that, described defrosting branch road also comprises the second throttling arrangement (4) that is 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 and described four-way change-over valve (2) of described compressor (1).
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 the second throttling arrangement (4).
7. heat pump type air adjusting device according to claim 1, it is characterized in that, described heat pump type air adjusting device also comprises control device, described control device is controlled described heat pump type air adjusting device and switch that described outdoor heat exchanger (5) is carried out defrost operation between different defrosting control model, and described defrosting control model comprises:
The first defrosting mode, under described the first defrosting mode, described valve open, described four-way change-over valve (2) is in described the second state, and described refrigerant heater (14) is opened;
The second defrosting mode, under described the second defrosting mode, described valve closing, described four-way change-over valve (2) is in described the first state, and described refrigerant heater (14) cuts out.
8. heat pump type air adjusting device according to claim 7 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 detection of outdoor environment temperature, under described the first defrosting mode, when described the first temperature measuring equipment detects described outdoor environment temperature greater than the first predetermined temperature, described control device is controlled described outside heat exchange blower fan (6) and is opened, and described control device controlled described outside heat exchange blower fan (6) and cuts out when described outdoor environment temperature was less than or equal to described the first predetermined temperature.
9. heat pump type air adjusting device according to claim 7 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 for detection of the coil temperature of described indoor heat exchanger (13), under described the first defrosting mode, the coil temperature that detects described indoor heat exchanger (13) when described the second temperature measuring equipment is during more than or equal to the second predetermined temperature, described control device is controlled described indoor heat exchange blower fan (12) and is opened, the coil temperature that detects described indoor heat exchanger (13) is during less than the 3rd predetermined temperature, described control device controls described indoor heat exchange blower fan (12) and cuts out, wherein, described the 3rd predetermined temperature is less than or equal to described the second predetermined temperature.
10. heat pump type air adjusting device according to claim 9 is characterized in that, described compressor (1) continuous service under described the first defrosting mode.
11. heat pump type air adjusting device according to claim 10 is characterized in that, described compressor (1) is frequency-changeable compressor (1), and described compressor (1) moves in 60 to 120Hz scope under described the first defrosting mode.
12. heat pump type air adjusting device according to claim 7, it is characterized in that, described control device also comprises the time detection device that detects the operation duration of described heat pump type air adjusting device under described the first defrosting mode, when described time detection device detected described operation duration more than or equal to predetermined amount of time, described control device was controlled described heat pump type air adjusting device and is switched to described the second defrosting mode from described the first defrosting mode.
13. heat pump type air adjusting device according to claim 7, it is characterized in that, described control device also comprises the 3rd temperature measuring equipment for detection of described outdoor heat exchanger (5) coil temperature, when described heat pump type air adjusting device heating operation, when described the 3rd temperature measuring equipment detects described outdoor heat exchanger (5) when coil temperature is less than or equal to the 4th predetermined temperature, described control device is controlled described refrigerant heater (14) and is opened.
14. heat pump type air adjusting device according to claim 7, it is characterized in that, described control device also comprises for detection of the first temperature measuring equipment of outdoor environment temperature with for detection of the 3rd temperature measuring equipment of described outdoor heat exchanger (5) coil temperature, when described heat pump type air adjusting device heating operation, when the difference that detects the described outdoor environment temperature that described outdoor heat exchanger (5) coil temperature detects less than described the first temperature measuring equipment when described the 3rd temperature measuring equipment surpassed the predetermined temperature difference, described control device was controlled described refrigerant heater (14) and is opened.
15. heat pump type air adjusting device according to claim 7, it is characterized in that, described control device also comprises the first temperature measuring equipment for detection of outdoor environment temperature, when described heat pump type air adjusting device heating operation, when described the first temperature measuring equipment detected described outdoor environment temperature and is less than or equal to the 5th temperature, described control device was controlled described refrigerant heater (14) and is opened.
16. heat pump type air adjusting device according to claim 1 is characterized in that, described tonifying Qi loop also comprises the check valve (16) of connecting and arranging with described tonifying Qi valve (15).
17. heat pump type air adjusting device according to claim 3 is characterized in that, described defrosting branch road also comprises the second throttling arrangement (4) and the check valve that is connected in series with described branch road valve (3).
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