CN103363601A - Heat pump type air conditioner - Google Patents
Heat pump type air conditioner Download PDFInfo
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- 238000010257 thawing Methods 0.000 claims abstract description 136
- 239000003507 refrigerant Substances 0.000 claims abstract description 88
- 238000010438 heat treatment Methods 0.000 claims abstract description 47
- 238000004378 air conditioning Methods 0.000 claims abstract description 22
- 238000005057 refrigeration Methods 0.000 claims abstract description 6
- 238000001514 detection method Methods 0.000 claims description 19
- 230000008901 benefit Effects 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 21
- 230000008569 process Effects 0.000 description 19
- 230000000694 effects Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 230000007613 environmental effect Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000002411 adverse 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
- 230000001133 acceleration Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000005096 rolling process Methods 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 invention provides a heat pump type air conditioning device, which comprises an air conditioning main loop and a defrosting device for defrosting an outdoor side heat exchanger (103, 203), wherein the air conditioning main loop comprises a compressor (101, 201), a four-way reversing valve (102, 202), the outdoor side heat exchanger (103, 203), an expansion device (107, 207) and an indoor side heat exchanger (110, 210) which are sequentially connected through a refrigeration pipeline, and the defrosting device is a refrigerant heating device (106, 206) connected in series on the air conditioning main loop. According to the heat pump type air conditioning device of the present invention, the function of defrosting the outdoor heat exchanger while heating can be realized only by connecting the refrigerant heating device in series to the main air conditioning circuit, and therefore, the heat pump type air conditioning device has the advantages of simple structure and low manufacturing cost.
Description
Technical field
The present invention relates to filed of air conditioning, more specifically, relate to a kind of heat pump type air adjusting device.
Background technology
The heat pump type air adjusting device is in the process of operation cold season, and the temperature of outdoor heat exchanger is lower than environment temperature.If outdoor environment temperature is lower than below 7 ℃, the surface temperature of outdoor heat exchanger may be lower than 0 ℃.If the humidity of outdoor environment is enough large simultaneously, can cause the outdoor heat exchanger frosting, even freeze, thereby seriously hinder the heat exchange of outdoor heat exchanger, make the rapidly significantly decay of heating performance of heat pump type air adjusting device, the appreciable impact heating effect, even cause compressor of air conditioner to break down.Need in time the outdoor heat exchanger processing that defrosts for this reason.
Defrost mode traditional in the prior art is as follows: for making the outdoor heat exchanger defrosting, 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 outdoor heat exchanger.
Yet there is more drawback in traditional Defrost mode:
Indoor evaporator absorbs the room heat during defrosting, affects the comfortableness in room.When adopting traditional defrosting mode to defrost, the four-way change-over valve commutation, the temperature fast reducing of indoor heat exchanger is to below-20 ℃, and a large amount of low temperature liquid refrigerants accumulate in indoor heat exchanger, mode by free convection absorbs the indoor set amount of heat, causes room temperature to descend.Especially in the winter of cold, the off-premises station defrosting time is longer, and the room is more violent by the wall heat radiation, and fluctuations in indoor temperature can be larger.According to the comfortableness simulated experiment, the room temperature maximum can descend 8～10 ℃, has had a strong impact on the room comfortableness.
Again obtain hot blast and need the long time.Adopt traditional defrosting mode, at first need compressor shutdown, heat exchange blower fan in indoor 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, and is totally unfavorable to the comfortableness in room.
Traditional defrosting mode is unfavorable for the compressor reliability service.Adopt traditional defrosting mode, mainly utilize compressor that refrigerant institute work is defrosted.Enter when defrosting, the suction temperature of compressor maintains below-25 ℃ even is lower, and air-breathing meter pressure maintains 1～2bar, a large amount of liquid refrigerants accumulates in the place, suction port of compressor, the as easy as rolling off a log hydraulic compression that causes, unfavorable to the reliability service of compressor, affect actual life of compressor.
In the prior art, the conditioner of continuously heating and defrosting has also been proposed, can realize defrosting while continuing heating, for example the Chinese patent file of publication number CN 1916538A, CN 1916538A, CN101476801A has all proposed the conditioner of continuously heating and defrosting separately.But the conditioner of various continuously heating and defrostings of the prior art, adopt at least two branch roads, and need to set up the devices such as a plurality of valves or electric expansion valve cooperates and realizes the function that defrosts while continuing heating, therefore pipeline and parts are many, syndeton and control device are also very complicated, cause cost of manufacture all significantly to improve.
Summary of the invention
The object of the invention is to provide a kind of heat pump type air adjusting device, and this heat pump type air adjusting device adopts simple structure to have the function that when heating outdoor heat exchanger is defrosted.
The invention provides a kind of heat pump type air adjusting device, comprise: the air conditioning major loop, comprise the compressor that connects in turn by refrigeration pipe, four-way change-over valve, outdoor heat exchanger, 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; Defroster is used for outdoor heat exchanger is carried out defrost operation; Defroster is the refrigerant heater that is connected on the air conditioning major loop.
Further, the refrigerant heater is arranged between outdoor heat exchanger and the expansion gear.
Further, the refrigerant heater is arranged between suction port of compressor end and the four-way change-over valve.
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, four-way change-over valve is in the second state, and the refrigerant heater is opened; The second defrosting mode, under the second defrosting mode, four-way change-over valve is 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, compressor continuous service.
Further, compressor is frequency-changeable compressor, moves in 60 to 120 hertz frequency range 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 coil temperature of outdoor heat exchanger, when heat pump type air adjusting device heating operation, when the coil temperature that detects outdoor heat exchanger when the 3rd temperature measuring equipment was 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 the coil temperature of outdoor heat exchanger, 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 predetermined temperature, control device control refrigerant heater was opened.
According to heat pump type air adjusting device of the present invention, because only series connection refrigerant heater namely can be implemented in the function that outdoor heat exchanger is defrosted when heating in the air conditioning major loop, thereby have that defroster is simple in structure, the advantage of low cost of manufacture.
Description of drawings
The accompanying drawing 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 is the system schematic according to the heat pump type air adjusting device of first embodiment of the invention;
Fig. 2 is that the refrigerant according to the heat pump type air adjusting device refrigerating operaton of first embodiment of the invention flows to schematic diagram;
Fig. 3 is that the refrigerant according to the heat pump type air adjusting device heating operation of first embodiment of the invention flows to schematic diagram;
Fig. 4 flows to schematic diagram according to the refrigerant that the heat pump type air adjusting device of first embodiment of the invention is moved under the first defrosting mode;
Fig. 5 flows to schematic diagram according to the refrigerant that the heat pump type air adjusting device of first embodiment of the invention is moved under the second defrosting mode;
Fig. 6 is the system schematic according to the heat pump type air adjusting device of second embodiment of the invention;
Fig. 7 is that the refrigerant according to the heat pump type air adjusting device refrigerating operaton of second embodiment of the invention flows to schematic diagram;
Fig. 8 is that the refrigerant according to the heat pump type air adjusting device heating operation of second embodiment of the invention flows to schematic diagram;
Fig. 9 flows to schematic diagram according to the refrigerant that the heat pump type air adjusting device of second embodiment of the invention is moved under the first defrosting mode; And
Figure 10 flows to schematic diagram according to the refrigerant that the heat pump type air adjusting device of second embodiment of the invention is moved under the second defrosting mode.
Each mark representative among the figure:
101,201 compressors
102,202 four-way change-over valves
103,203 outdoor heat exchangers
104,204 outside heat exchange blower fans
105,205 outside heat exchange blower motors
106,206 refrigerant heaters
107,207 electric expansion valves
108,208 indoor heat exchange blower motors
109,209 indoor heat exchange blower fans
110,210 indoor heat exchangers
The specific embodiment
Describe below with reference to the accompanying drawings and in conjunction with the embodiments the present invention in detail.Need to prove that in the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.
The first embodiment
To shown in Figure 5, the heat pump type air adjusting device of the first embodiment comprises the air conditioning major loop and is used for outdoor heat exchanger 103 is carried out the defroster of defrost operation such as Fig. 1.The air conditioning major loop connects in turn compressor 101, four-way change-over valve 102, outdoor heat exchanger 103, electric expansion valve 107 and indoor heat exchanger 110 by refrigeration pipe and forms.Electric expansion valve 107 is the free adjustment aperture in the aperture scope of complete shut-down and standard-sized sheet.The first interface of four-way change-over valve 102 is communicated with the port of export of compressor 101, the second interface is communicated with outdoor heat exchanger 103, the 3rd interface is communicated with indoor heat exchanger 110, the 4th interface is communicated with the arrival end of compressor 101.Four-way change-over valve 102 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.Defroster is the refrigerant heater 106 that is connected between outdoor heat exchanger 103 and the electric expansion valve 107.
The heat pump type air adjusting device of the first embodiment, because only series connection refrigerant heater 106 namely can be implemented in the function that outdoor heat exchanger is defrosted when heating in the air conditioning major loop, thereby have that defroster is simple in structure, the advantage of low cost of manufacture.Can utilize the sensible heat of refrigerant that outdoor heat exchanger is defrosted, performance is more superior.
The heat pump type air adjusting device of the first embodiment four-way change-over valve 102 when refrigerating operaton is in the first state.As shown in Figure 2, when refrigerating operaton, refrigerant circulates according to following flow direction: compressor 101 → four-way change-over valve 102 → outdoor heat exchanger 103 → refrigerant heater 106 → electric expansion valve 107 → indoor heat exchanger 110 → four-way change-over valve 102 → compressor 101.When refrigerating operaton, refrigerant heater 106 cuts out.
The heat pump type air adjusting device of the first embodiment four-way change-over valve 102 when heating operation is in the second state.As shown in Figure 3, when heating operation, refrigerant circulates according to following flow direction: compressor 101 → four-way change-over valve 102 → indoor heat exchanger 110 → electric expansion valve 107 → refrigerant heater 106 → outdoor heat exchanger 103 → four-way change-over valve 102 → compressor 101.
In heating process, can optionally open refrigerant heater 106 for 107 outlets also are the refrigerant heating of outdoor heat exchanger 103 entrances to electric expansion valve, to suppress outdoor heat exchanger 103 frostings, and promote enthalpy and mass density that compressor 101 sucks refrigerant, promote heating effect and heating capacity, promote and heat comfort level.
The heat pump type air adjusting device of the first embodiment has also comprised control device.Control device and four-way change-over valve 102, refrigerant heater 106 are connected with compressor and are connected.This control device is used for control heat pump type air adjusting device and switches that outdoor heat exchanger 103 is carried out defrost operation between different defrosting control model.Particularly, the defrosting control model can comprise the first defrosting mode and the second defrosting mode.Below the first defrosting mode and the second defrosting mode are described respectively.
The first defrosting mode
Under the first defrosting mode, four-way change-over valve 102 is in the second state, and refrigerant heater 106 is opened.Refrigerant heater 106 is opened, and can give the heating of systemic circulation refrigerant, promotes energy state, and avoid the risk of compressor Wet Compression, the reliability of lifting 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.
As shown in Figure 4, under the first defrosting mode, refrigerant circulates according to following flow direction: compressor 101 → four-way change-over valve 102 → indoor heat exchanger 110 → electric expansion valve 107 → refrigerant heater 106 → outdoor heat exchanger 103 → four-way change-over valve 102 → compressor 101.
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 101 continuous services.Compressor 101 is preferably frequency-changeable compressor in the present embodiment, preferably adopts the high frequency operation under the first defrosting mode, and compressor 101 is moved in 60 to 120 hertz frequency range.
2) four-way change-over valve 102 maintains the second state that makes the air conditioning major loop be in heating operation, need not commutate.
3) the heat pump type air adjusting device also comprises outside heat exchange blower fan 104.Outside heat exchange blower motor 105 is used for drive chamber's outside heat exchange blower fan 104.Control device is connected with outside heat exchange blower motor 105 with control room outside heat exchange blower fan 104 opens or closes.Control device also comprises the first temperature measuring equipment for detection of outdoor environment temperature.When the first temperature measuring equipment detected outdoor environment temperature greater than the first predetermined temperature, outside heat exchange blower fan 104 can be selected to continue to open, and conducted heat with the cross-ventilation that takes full advantage of higher temperature in the environment and carried out defrosting.When the coil temperature of outdoor heat exchanger 103 greater than a temperature definite value, for example greater than 5 ℃, can select close chamber's outside heat exchange blower fan 104.When the first temperature measuring equipment detected outdoor environment temperature and is less than or equal to the first predetermined temperature, outside heat exchange blower fan 104 can be chosen as immediately closed, to avoid the defrosting thermal loss of outdoor heat exchanger 103 inside.This first predetermined temperature for example can be a value between 4 to 10 ℃, is preferably 5 ℃.
4) aperture of electric expansion valve 107 should guarantee that suitable refrigerant flow passes through, and enters outdoor heat exchanger 103 and carries out defrosting.
5) the heat pump type air adjusting device also comprises indoor heat exchange blower fan 109, and indoor heat exchange blower motor 108 is used for the inboard heat exchange blower fan 109 of drive chamber.Control device is connected with indoor heat exchange blower motor 108 with the inboard heat exchange blower fan 109 in control room opens or closes.Indoor heat exchange blower fan 109 can cut out operation according to the coil temperature of indoor heat exchanger 110, 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 110, the coil temperature that detects indoor heat exchanger 110 when the second temperature measuring equipment is during greater than the second predetermined temperature, and the inboard heat exchange blower fan 109 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 110 when the second temperature measuring equipment is during less than the 3rd predetermined temperature, and the inboard heat exchange blower fan 109 in control device control room cuts out.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 ℃.
6) refrigerant heater 106 is opened.
The second defrosting mode
Under the second defrosting mode, four-way change-over valve 102 is in the first state, and refrigerant heater 106 selectively opens or cuts out.
As shown in Figure 5, under the second defrosting mode, refrigerant circulates according to following flow direction: compressor 101 → four-way change-over valve 102 → outdoor heat exchanger 103 → refrigerant heater 106 → electric expansion valve 107 → indoor heat exchanger 110 → four-way change-over valve 102 → compressor 101.
When the outdoor heat exchanger 103 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 103 can not reach predetermined temperature value after experience a period of time under the first defrosting mode, for example the coil temperature at operation experience outdoor heat exchanger 103 after 8 minutes under the first defrosting mode still can not reach more than 10 ℃, 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) be in the situation of frequency-changeable compressor at compressor 101; the process that when entering the second defrosting mode, compressor 101 is shut down after needing finish through first shutdown, initial start-up, raising frequency and high frequency operation (for example moving in 60 to 120 hertz frequency range), defrosting again, again start after system's high-low pressure pressure balance.
When 2) entering the second defrosting mode; four-way change-over valve 102 commutates as making the first state of air conditioning major loop refrigerating operaton in a period of time after compressor 101 first shutdown, switches to after defrosting is finished to make the air conditioning major loop carry out the second state of heating operation after compressor 101 is shut down a period of time again.
3) outside heat exchange blower fan 104 is shut down after the heat pump type air adjusting device enters the second defrosting mode, the defrosting heats in the outdoor heat exchanger 103 is taken away preventing.After finishing, the second defrosting mode determines whether to open operation according to service condition again.
4) aperture of electric expansion valve 107 should guarantee that suitable refrigerant flow passes through, and guarantees rapid defrosting.
5) lower fast room temperature in order to prevent in the second defrosting mode, indoor heat exchange blower fan 109 cuts out operation in the second defrosting mode.
6) refrigerant heater 106 cuts out.
For the heat pump type air adjusting device is controlled refrigerant heater 106 in heating process, control device also comprises the 3rd temperature measuring equipment for detection of the coil temperature of outdoor heat exchanger 103, when the coil temperature that detects outdoor heat exchanger 103 when the 3rd temperature measuring equipment was less than or equal to predetermined the 4th predetermined temperature, defrosting control device control refrigerant heater 106 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 outdoor environment temperature that the coil temperature that detects outdoor heat exchanger 103 when the 3rd temperature measuring equipment detects less than the first temperature measuring equipment surpassed the predetermined temperature difference, control device control refrigerant heater 106 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 106 was opened.The 5th predetermined temperature for example can be a value between-5 to 5 ℃, is preferably 5 ℃.
Need to prove that the second defrosting mode is that the useful of the first defrosting mode replenished, its effect is to strengthen the defrosting ability under the abominable outdoor environmental conditions or 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 increase the defrosting ability; Simultaneously owing to adopt 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.Simultaneously, because the refrigerant heater can optionally open or cut out, under the second defrosting mode, also can further strengthen the defrosting ability.
The second embodiment
The structure of the heat pump type air adjusting device of the second embodiment and control mode such as Fig. 6 are to shown in Figure 10, basically identical with the first embodiment.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 206 is different in the heat pump type air adjusting device of the second embodiment, among the second embodiment, refrigerant heater 206 is series on the arrival end and the refrigeration pipe between the indoor heat exchanger 210 of compressor 201 in the air conditioning major loop.
The heat pump type air adjusting device of the second embodiment is when refrigerating operaton, and four-way change-over valve 202 is in the first state.As shown in Figure 7, refrigerant circulates according to following flow direction: compressor 201 → four-way change-over valve 202 → outdoor heat exchanger 203 → electric expansion valve 207 → indoor heat exchanger 210 → four-way change-over valve 202 → refrigerant heater 206 → compressor 201.Refrigerant heater 206 is in closed condition.
The heat pump type air adjusting device of the second embodiment is when heating operation, and four-way change-over valve 202 is in the second state.As shown in Figure 8, refrigerant circulates according to following flow direction: compressor 201 → four-way change-over valve 202 → indoor heat exchanger 210 → electric expansion valve 207 → outdoor heat exchanger 203 → four-way change-over valve 202 → refrigerant heater 206 → compressor 201.
In addition when heating operation, can optionally open refrigerant heater 206 is used for heating to the refrigerant of compressor 201 arrival ends, promote the mass density that compressor 201 sucks refrigerant, lifting enters refrigerant temperature and the heating effect in the indoor heat exchanger 210, and suppresses outdoor heat exchanger 203 frostings.The condition of opening refrigerant heater 206 is all identical with the first embodiment with control mode.
The heat pump type air adjusting device of the second embodiment is the same with the first embodiment, has also comprised control device.This control device is used for control heat pump type air adjusting device and switches that outdoor heat exchanger 203 is carried out defrost operation between different defrosting control model.Particularly, the defrosting control model comprises the first defrosting mode and the second defrosting mode.
Under the first defrosting mode, four-way change-over valve 202 is in the second state.As shown in Figure 9, refrigerant circulates according to following flow direction: compressor 201 → four-way change-over valve 202 → indoor heat exchanger 210 → electric expansion valve 207 → outdoor heat exchanger 203 → four-way change-over valve 202 → refrigerant heater 206 → compressor 201.
In the first defrosting mode, opening refrigerant heater 206 is used for heating to the refrigerant of compressor 201 entrances, promote the mass density that compressor 201 sucks refrigerant, lifting enters the refrigerant temperature of outdoor heat exchanger 203, thereby acceleration defrosting, and realize the operation of indoor set continuously heating, avoid the indoor environment temperature fluctuation and the comfort level reduction.
Under the second defrosting mode, four-way change-over valve 202 is in the first state.As shown in figure 10, under the second defrosting mode, refrigerant circulates according to following flow direction: compressor 201 → four-way change-over valve 202 → outdoor heat exchanger 203 → electric expansion valve 207 → indoor heat exchanger 210 → four-way change-over valve 202 → refrigerant heater 206 → compressor 201.
The not specifically described content of other of the second embodiment, for example under the first defrosting mode and the control strategy under the second defrosting mode and switching condition of the first defrosting mode and the second defrosting mode etc., all can with reference to the associated description of the first embodiment, no longer repeat at this.
The heat pump type air adjusting device of the second 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 only series connection refrigerant heater namely can be implemented in the function that outdoor heat exchanger is defrosted when heating in the air conditioning major loop, thereby have that defroster is simple in structure, the advantage of 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, because the refrigerant heater of connecting in the air conditioning major loop also can be accelerated the defrost process under the process that heats and the second defrosting mode.
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 (12)
1. heat pump type air adjusting device comprises:
The air conditioning major loop, comprise the compressor (101 that connects in turn by refrigeration pipe, 201), four-way change-over valve (102,202), outdoor heat exchanger (103,203), expansion gear (107,207) and indoor heat exchanger (110,210), described four-way change-over valve (102,202) first interface and described compressor (101,201) the port of export is communicated with, the second interface and described outdoor heat exchanger (103,203) be communicated with, the 3rd interface and described indoor heat exchanger (110,210) be communicated with, the 4th interface and described compressor (101,201) arrival end is communicated with, described four-way change-over valve (102,202) 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;
Defroster is used for described outdoor heat exchanger (103,203) is carried out defrost operation;
It is characterized in that,
Described defroster is the refrigerant heater (106,206) that is connected on the described air conditioning major loop.
2. heat pump type air adjusting device according to claim 1 is characterized in that, described refrigerant heater (106) is arranged between described outdoor heat exchanger (103) and the described expansion gear (107).
3. heat pump type air adjusting device according to claim 1 is characterized in that, described refrigerant heater (206) is arranged between described compressor (201) arrival end and the described four-way change-over valve (202).
4. each described heat pump type air adjusting device in 3 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 is switched between different defrosting control models with to described outdoor heat exchanger (103,203) carry out defrost operation, described defrosting control model comprises: the first defrosting mode, under described the first defrosting mode, described four-way change-over valve (102,202) be in described the second state, described refrigerant heater (106,206) open;
The second defrosting mode, under described the second defrosting mode, described four-way change-over valve (102,202) is in described the first state, and described refrigerant heater (106,206) cuts out.
5. heat pump type air adjusting device according to claim 4 is characterized in that,
Described heat pump type air adjusting device also comprises outside heat exchange blower fan (104,204);
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 (104,204) and is opened, and described control device controlled described outside heat exchange blower fan (104,204) and cuts out when described outdoor environment temperature was less than or equal to described the first predetermined temperature.
6. heat pump type air adjusting device according to claim 4 is characterized in that,
Described heat pump type air adjusting device also comprises indoor heat exchange blower fan (109,209);
Described control device also comprises for detection of described indoor heat exchanger (110, the second temperature measuring equipment of coil temperature 210), under described the first defrosting mode, when described the second temperature measuring equipment detects described indoor heat exchanger (110,210) coil temperature is during more than or equal to the second predetermined temperature, described control device is controlled described indoor heat exchange blower fan (109,209) open, detect described indoor heat exchanger (110,210) coil temperature is during less than described the 3rd predetermined temperature, described control device is controlled described indoor heat exchange blower fan (109,209) close, wherein, described the 3rd predetermined temperature is less than or equal to described the second predetermined temperature.
7. heat pump type air adjusting device according to claim 6 is characterized in that, described compressor (101,201) continuous service.
8. heat pump type air adjusting device according to claim 7, it is characterized in that, described compressor (101,201) is frequency-changeable compressor, moves in 60 to 120 hertz frequency range at described compressor (101,201) under described the first defrosting mode.
9. heat pump type air adjusting device according to claim 4, 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.
10. heat pump type air adjusting device according to claim 4, it is characterized in that, described control device also comprises the 3rd temperature measuring equipment for detection of the coil temperature of described outdoor heat exchanger (103,203), when described heat pump type air adjusting device heating operation, when the coil temperature that detects described outdoor heat exchanger (103,203) when described the 3rd temperature measuring equipment was less than or equal to the 4th predetermined temperature, described control device was controlled described refrigerant heater (106,206) and is opened.
11. heat pump type air adjusting device according to claim 4, 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 described outdoor heat exchanger (103, the 3rd temperature measuring equipment of coil temperature 203), 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 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 (106,206) open.
12. heat pump type air adjusting device according to claim 4, 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 predetermined temperature, described control device was controlled described refrigerant heater (106,206) and is opened.
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| CN105605840A (en) * | 2016-02-01 | 2016-05-25 | 浙江丹特卫顿热泵有限公司 | Intelligent defrosting method with learning function |
| CN106247479A (en) * | 2016-10-09 | 2016-12-21 | 江苏心日源建筑节能科技股份有限公司 | Air-conditioner outdoor unit and there is its air-conditioning |
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