CN103363708A - Heat pump type air conditioning device - Google Patents

Heat pump type air conditioning device Download PDF

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Publication number
CN103363708A
CN103363708A CN2012101020997A CN201210102099A CN103363708A CN 103363708 A CN103363708 A CN 103363708A CN 2012101020997 A CN2012101020997 A CN 2012101020997A CN 201210102099 A CN201210102099 A CN 201210102099A CN 103363708 A CN103363708 A CN 103363708A
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China
Prior art keywords
pump type
type air
heat pump
air adjusting
heat exchanger
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CN2012101020997A
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Chinese (zh)
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CN103363708B (en
Inventor
张辉
陈绍林
熊军
段亮
王现林
孟琪林
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珠海格力电器股份有限公司
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Priority to CN201210102099.7A priority Critical patent/CN103363708B/en
Publication of CN103363708A publication Critical patent/CN103363708A/en
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Publication of CN103363708B publication Critical patent/CN103363708B/en

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Abstract

The invention provides a heat pump type air conditioning device which comprises an air conditioning main loop, an air supply loop and a defrosting device. The air conditioning main loop comprises a compressor, a four-way reversing valve, an outdoor heat exchanger, a throttling device, a flash evaporator, an expansion device and an indoor heat exchanger all of which are sequentially connected through a refrigeration pipeline, wherein a first connector of the four-way reversing valve is communicated with the outlet end of the compressor, a second connector of the four-way reversing valve is communicated with the outdoor heat exchanger, a third connector of the four-way reversing valve is communicated with the indoor heat exchanger, and a fourth connector of the four-way reversing valve is communicated with the inlet end of the compressor. One end of the air supply loop is connected with the flash evaporator, the other end of the air supply loop is connected with the compressor, and the air supply loop comprises air supply valves which are connected through a pipeline. The defrosting device is used for carrying out defrosting on the outdoor heat exchanger, and is a refrigerant heating device which is connected to the air conditioning main loop in series. According to the heat pump type air conditioning device, defrosting can be carried out under the condition that the compressor does not need to be stopped, defrosting is timely, and the structure is simple.

Description

The heat pump type air adjusting device
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 it is timely and simple in structure to defrost.
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, throttling arrangement, 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; 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 throttling arrangement.
Further, the refrigerant heater is arranged between suction port of compressor end and the four-way change-over valve.
Further, the refrigerant heater is arranged between outdoor heat exchanger 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, 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.
Further, the tonifying Qi loop also comprises the check valve of connecting and arranging with the tonifying Qi 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, throttling arrangement, 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; Defroster is the refrigerant heater that is connected on the air conditioning major loop.The heat pump type air adjusting device only in the air conditioning major loop series connection refrigerant heater can be implemented in the function that outdoor heat exchanger is defrosted when heating; thereby it is simple in structure and do not need compressor shutdown to have a defroster; in time realize the advantage of defrosting; certainly can also utilize the sensible heat of refrigerant that outdoor heat exchanger is defrosted, performance is more superior.
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;
The refrigerant that Fig. 2 shows the heat pump type air adjusting device refrigerating operaton of Fig. 1 flows to schematic diagram;
The refrigerant that Fig. 3 shows the heat pump type air adjusting device heating operation 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 second embodiment of heat pump type air adjusting device of the present invention;
The refrigerant that Fig. 7 shows the heat pump type air adjusting device refrigerating operaton of Fig. 6 flows to schematic diagram;
The refrigerant that Fig. 8 shows the heat pump type air adjusting device heating operation 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 3rd embodiment of heat pump type air adjusting device of the present invention;
The refrigerant that Figure 12 shows the heat pump type air adjusting device refrigerating operaton of Figure 11 flows to schematic diagram;
The refrigerant that Figure 13 shows the heat pump type air adjusting device heating operation of Figure 11 flows to schematic diagram;
Figure 14 shows the refrigerant that the heat pump type air adjusting device of Figure 11 moves and flows to schematic diagram under the first defrosting mode; And
Figure 15 shows the refrigerant that the heat pump type air adjusting device of Figure 11 moves and flows to schematic diagram under the second defrosting mode.
The specific embodiment
Need to prove that in the situation of not conflicting, 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.
As shown in Figure 1, the first embodiment of heat pump type air adjusting device provided by the invention, the heat pump type air adjusting device comprises the air conditioning major loop, tonifying Qi loop and defroster, the air conditioning major loop comprises the compressor 1 that connects in turn by refrigeration pipe, four-way change-over valve 2, outdoor heat exchanger 3, throttling arrangement 8, flash vessel 7, expansion gear 9 and indoor heat exchanger 12, 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 3, the 3rd interface is communicated with indoor heat exchanger 12, the 4th interface is communicated with the arrival end of compressor 1, and four-way change-over valve 2 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; Tonifying Qi loop one end is connected with flash vessel 7, the other end is connected with compressor 1, and the tonifying Qi loop comprises the tonifying Qi valve 13 that connects by pipeline; Defroster is used for outdoor heat exchanger 3 is carried out defrost operation, and defroster is the refrigerant heater 6 that is connected on the air conditioning major loop, and refrigerant heater 6 is arranged between outdoor heat exchanger 3 and the throttling arrangement 8.
The heat pump type air adjusting device of the first embodiment; the function that when refrigerant heater 6 namely can be implemented in and heat owing to only connect in the air conditioning major loop outdoor heat exchanger 3 is defrosted; thereby it is simple in structure and do not need compressor shutdown to have a defroster, in time realizes the advantage of defrosting.Certainly can also utilize the sensible heat of refrigerant that outdoor heat exchanger 3 is defrosted, performance is more superior.
Preferably, the tonifying Qi loop also comprises the check valve 14 of connecting and arranging with tonifying Qi valve 13.Wherein tonifying Qi valve 13 is two-port valve, and the setting of check valve 14 makes the refrigerant in the tonifying Qi loop flow to compressor 1 by flash vessel 7.Need to prove that the reason that check valve 14 arranges 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 four-way change-over valve 2 when refrigerating operaton is in the first state.As shown in Figure 2, when refrigerating operaton, refrigerant circulates according to following flow direction: compressor 1 → four-way change-over valve 2 → outdoor heat exchanger 3 → refrigerant heater 6 → throttling arrangement 8 → flash vessel 7 → expansion gear 9 → indoor heat exchanger 12 → four-way change-over valve 2 → compressor 1.Wherein, some refrigerant entered the tonifying Qi loop after advancing flash vessel 7, flowed in the compressor 1 again.When refrigerating operaton, refrigerant heater 6 cuts out.
The heat pump type air adjusting device of the first embodiment four-way change-over valve 2 when heating operation is in the second state.As shown in Figure 3, when heating operation, refrigerant circulates according to following flow direction: compressor 1 → four-way change-over valve 2 → indoor heat exchanger 12 → expansion gear 9 → flash vessel 7 → throttling arrangement 8 → refrigerant heater 6 → outdoor heat exchanger 3 → four-way change-over valve 2 → compressor 1.Wherein, some refrigerant entered the tonifying Qi loop after advancing flash vessel 7, flowed in the compressor 1 again.
In heating process, can open refrigerant heater 6 and be used for heating to the refrigerant of 9 outdoor heat exchangers, 3 entrances, with 3 frostings of inhibition outdoor heat exchanger, and promote enthalpy and the mass density that compressor 1 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.This control device is used for control heat pump type air adjusting device and switches that outdoor heat exchanger 3 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 2 is in the second state, and refrigerant heater 6 is opened.Refrigerant heater 6 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 1 → four-way change-over valve 2 → indoor heat exchanger 12 → expansion gear 9 → flash vessel 7 → throttling arrangement 8 → refrigerant heater 6 → outdoor heat exchanger 3 → four-way change-over valve 2 → compressor 1.Wherein, some refrigerant entered the tonifying Qi loop after advancing flash vessel 7, 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.Compressor 1 is preferably frequency-changeable compressor in the present embodiment, preferably adopts the high frequency operation under the first defrosting mode, and compressor 1 is moved in 60 to 120 hertz frequency range.
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) the heat pump type air adjusting device also comprises outside heat exchange blower fan 4.Outside heat exchange blower motor 5 is used for drive chamber's outside heat exchange blower fan 4.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 4 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 3 greater than a temperature definite value, for example greater than 5 ℃, can select close chamber's outside heat exchange blower fan 4.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 4 can be chosen as immediately closed, to avoid the defrosting thermal loss of outdoor heat exchanger 3 inside.This first predetermined temperature for example can be a value between 4 to 10 ℃, is preferably 5 ℃.
4) aperture of expansion gear 9 should guarantee that suitable refrigerant flow passes through, and enters outdoor heat exchanger 3 and carries out defrosting.
5) the heat pump type air adjusting device also comprises indoor heat exchange blower fan 11, and indoor heat exchange blower motor 10 is used for the inboard heat exchange blower fan 11 of drive chamber.Indoor heat exchange blower fan 11 can cut out operation according to the coil temperature of indoor heat exchanger 12, 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 3 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 12, the coil temperature that detects indoor heat exchanger 12 when the second temperature measuring equipment is during greater than the second predetermined temperature, and the inboard heat exchange blower fan 11 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 12 when the second temperature measuring equipment is during less than the 3rd predetermined temperature, and the inboard heat exchange blower fan 11 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 6 is opened.
The second defrosting mode
Under the second defrosting mode, four-way change-over valve 2 is in the first state, and refrigerant heater 6 selectively opens or 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 3 → refrigerant heater 6 → throttling arrangement 8 → flash vessel 7 → expansion gear 9 → indoor heat exchanger 12 → four-way change-over valve 2 → compressor 1.Wherein, some refrigerant entered the tonifying Qi loop after advancing flash vessel 7, flowed in the compressor 1 again.
When the outdoor heat exchanger 3 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 3 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 3 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 1; the process that when entering the second defrosting mode, compressor 1 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 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) outside heat exchange blower fan 4 is shut down after the heat pump type air adjusting device enters the second defrosting mode, the defrosting heats in the outdoor heat exchanger 3 is taken away preventing.After finishing, the second defrosting mode determines whether to open operation according to service condition again.
4) aperture of expansion gear 9 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 11 cuts out operation in the second defrosting mode.
6) refrigerant heater 6 cuts out.If but frosting is very thick, can opens operation and accelerate defrosting.
For the heat pump type air adjusting device is controlled refrigerant heater 6 in heating process, control device also comprises the 3rd temperature measuring equipment for detection of the coil temperature of outdoor heat exchanger 3, when the coil temperature that detects outdoor heat exchanger 3 when the 3rd temperature measuring equipment was less than or equal to predetermined the 4th predetermined temperature, defrosting control device control refrigerant heater 6 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 3 when the 3rd temperature measuring equipment detects less than the first temperature measuring equipment surpassed the predetermined temperature difference, control device control refrigerant heater 6 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 6 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.
According to Fig. 6 to Figure 10, the present invention also provides the second embodiment of heat pump type air adjusting device, and the structure of heat pump type air adjusting device and control mode are basic identical among the second embodiment.
Only be that from the difference of the first embodiment the setting position of refrigerant heater 6 is different in the heat pump type air adjusting device of the second embodiment, among the second embodiment, the refrigerant heater 6 of heat pump type air adjusting device is series on the arrival end and the refrigeration pipe between the indoor heat exchanger 12 of compressor 1 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 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 3 → throttling arrangement 8 → flash vessel 7 → expansion gear 9 → indoor heat exchanger 12 → four-way change-over valve 2 → refrigerant heater 6 → compressor 1.Wherein, some refrigerant entered the tonifying Qi loop after advancing flash vessel 7, flowed in the compressor 1 again.Refrigerant heater 6 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 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 12 → expansion gear 9 → flash vessel 7 → throttling arrangement 8 → outdoor heat exchanger 3 → four-way change-over valve 2 → refrigerant heater 6 → compressor 1.Wherein, some refrigerant entered the tonifying Qi loop after advancing flash vessel 7, flowed in the compressor 1 again.
In addition when heating operation, can open refrigerant heater 6 is used for heating to the refrigerant of compressor 1 arrival end, promote the mass density that compressor 1 sucks refrigerant, promote the refrigerant temperature and the heating effect that enter in the indoor heat exchanger 12, and suppress outdoor heat exchanger 3 frostings.The condition of opening refrigerant heater 6 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 3 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 2 is in the second state.As shown in Figure 9, refrigerant circulates according to following flow direction: compressor 1 → four-way change-over valve 2 → indoor heat exchanger 12 → expansion gear 9 → flash vessel 7 → throttling arrangement 8 → outdoor heat exchanger 3 → four-way change-over valve 2 → refrigerant heater 6 → compressor 1.
In the first defrosting mode, opening refrigerant heater 6 is used for heating to the refrigerant of compressor 1 entrance, promote the mass density that compressor 1 sucks refrigerant, lifting enters the refrigerant temperature of outdoor heat exchanger 3, 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 2 is in the first state.As shown in figure 10, under the second defrosting mode, refrigerant circulates according to following flow direction: compressor 1 → four-way change-over valve 2 → outdoor heat exchanger 3 → throttling arrangement 8 → flash vessel 7 → expansion gear 9 → indoor heat exchanger 12 → four-way change-over valve 2 → refrigerant heater 6 → compressor 1.
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 3 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 3, 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.
According to Figure 11 to Figure 15, the present invention also provides the 3rd embodiment of heat pump type air adjusting device, and the structure of heat pump type air adjusting device and control mode are basic identical among the 3rd embodiment.
Only be that from the difference of the first embodiment the setting position of refrigerant heater 6 is different in the heat pump type air adjusting device of the 3rd embodiment, among the 3rd embodiment, the refrigerant heater 6 of heat pump type air adjusting device is series in the air conditioning major loop on the refrigeration pipe between the four-way change-over valve 2 and outdoor heat exchanger 3.
The heat pump type air adjusting device of the 3rd embodiment is when refrigerating operaton, and four-way change-over valve 2 is in the first state.As shown in figure 12, refrigerant circulates according to following flow direction: compressor 1 → four-way change-over valve 2 → refrigerant heater 6 → outdoor heat exchanger 3 → throttling arrangement 8 → flash vessel 7 → expansion gear 9 → indoor heat exchanger 12 → four-way change-over valve 2 → compressor 1.Wherein, some refrigerant entered the tonifying Qi loop after advancing flash vessel 7, flowed in the compressor 1 again.Refrigerant heater 6 is in closed condition.
The heat pump type air adjusting device of the 3rd embodiment is when heating operation, and four-way change-over valve 2 is in the second state.As shown in figure 13, refrigerant circulates according to following flow direction: compressor 1 → four-way change-over valve 2 → indoor heat exchanger 12 → expansion gear 9 → flash vessel 7 → throttling arrangement 8 → outdoor heat exchanger 3 → refrigerant heater 6 → four-way change-over valve 2 → compressor 1.Wherein, some refrigerant entered the tonifying Qi loop after advancing flash vessel 7, flowed in the compressor 1 again.
In addition when heating operation, can open refrigerant heater 6 is used for heating to the refrigerant of compressor 1 arrival end, promote the mass density that compressor 1 sucks refrigerant, promote the refrigerant temperature and the heating effect that enter in the indoor heat exchanger 12, and suppress outdoor heat exchanger 3 frostings.The condition of opening refrigerant heater 6 is all identical with the first embodiment with control mode.
The heat pump type air adjusting device of the 3rd 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 3 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 2 is in the second state.As shown in figure 14, refrigerant circulates according to following flow direction: compressor 1 → four-way change-over valve 2 → indoor heat exchanger 12 → expansion gear 9 → flash vessel 7 → throttling arrangement 8 → outdoor heat exchanger 3 → refrigerant heater 6 → four-way change-over valve 2 → compressor 1.
In the first defrosting mode, opening refrigerant heater 6 is used for heating to the refrigerant of compressor 1 entrance, promote the mass density that compressor 1 sucks refrigerant, lifting enters the refrigerant temperature of outdoor heat exchanger 3, 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 2 is in the first state.As shown in figure 15, under the second defrosting mode, refrigerant circulates according to following flow direction: compressor 1 → four-way change-over valve 2 → refrigerant heater 6 → outdoor heat exchanger 3 → throttling arrangement 8 → flash vessel 7 → expansion gear 9 → indoor heat exchanger 12 → four-way change-over valve 2 → compressor 1.
In the first defrosting mode, open refrigerant heater 6 and be used for promoting the refrigerant temperature that enters outdoor heat exchanger 3 to the refrigerant heating of outdoor heat exchanger 3 entrances, thereby accelerate defrosting.
The not specifically described content of other of the 3rd 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 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 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 (13)

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 (3), throttling arrangement (8), flash vessel (7), expansion gear (9) and indoor heat exchanger (12), 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 (3), the 3rd interface is communicated with described indoor heat exchanger (12), 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 (7), and the other end is connected with described compressor (1), and described tonifying Qi loop comprises the tonifying Qi valve (13) that connects by pipeline;
Defroster is used for described outdoor heat exchanger (3) is carried out defrost operation; It is characterized in that,
Described defroster is the refrigerant heater (6) 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 (6) is arranged between described outdoor heat exchanger (3) and the described throttling arrangement (8).
3. heat pump type air adjusting device according to claim 1 is characterized in that, described refrigerant heater (6) is arranged between described compressor (1) arrival end and the described four-way change-over valve (2).
4. heat pump type air adjusting device according to claim 1 is characterized in that, described refrigerant heater (6) is arranged between described outdoor heat exchanger (3) and the described four-way change-over valve (2).
5. each described heat pump type air adjusting device in 4 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 (3) 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 four-way change-over valve (2) is in described the second state, and described refrigerant heater (6) is opened;
The second defrosting mode, under described the second defrosting mode, described four-way change-over valve (2) is in described the first state, and described refrigerant heater (6) cuts out.
6. heat pump type air adjusting device according to claim 5 is characterized in that,
Described heat pump type air adjusting device also comprises outside heat exchange blower fan (4);
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 (4) and is opened, and described control device controlled described outside heat exchange blower fan (4) and cuts out when described outdoor environment temperature was less than or equal to described the first predetermined temperature.
7. heat pump type air adjusting device according to claim 5 is characterized in that,
Described heat pump type air adjusting device also comprises indoor heat exchange blower fan (11);
Described control device also comprises the second temperature measuring equipment for detection of the coil temperature of described indoor heat exchanger (12), under described the first defrosting mode, the coil temperature that detects described indoor heat exchanger (12) 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 (11) and is opened, the coil temperature that detects described indoor heat exchanger (12) is during less than described the 3rd predetermined temperature, described control device controls described indoor heat exchange blower fan (11) and cuts out, wherein, described the 3rd predetermined temperature is less than or equal to described the second predetermined temperature.
8. heat pump type air adjusting device according to claim 7 is characterized in that, described compressor (1) continuous service.
9. heat pump type air adjusting device according to claim 5, 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 5, 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 (3), when described heat pump type air adjusting device heating operation, when the coil temperature that detects described outdoor heat exchanger (3) 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 (6) and is opened.
11. heat pump type air adjusting device according to claim 5, 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 the coil temperature of described outdoor heat exchanger (3), 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 (3) 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 (6) and is opened.
12. heat pump type air adjusting device according to claim 5, 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 (6) and is opened.
13. heat pump type air adjusting device according to claim 1 is characterized in that, described tonifying Qi loop also comprises the check valve (14) of connecting and arranging with described tonifying Qi valve (13).
CN201210102099.7A 2012-04-09 2012-04-09 Heat pump type air adjusting device CN103363708B (en)

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