CN100370200C - Air-conditioner - Google Patents
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- CN100370200C CN100370200C CNB200510007354XA CN200510007354A CN100370200C CN 100370200 C CN100370200 C CN 100370200C CN B200510007354X A CNB200510007354X A CN B200510007354XA CN 200510007354 A CN200510007354 A CN 200510007354A CN 100370200 C CN100370200 C CN 100370200C
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Abstract
The present invention relates to an air conditioning device which at least comprises a compressor, a four-way valve, an indoor and an outdoor heat exchangers, connecting pipes, a control device and an expansion valve, wherein the connecting pipes are used for connecting the compressor, the four-way valve and the indoor and the outdoor heat exchangers; the control device controls the compressor, the four-way valve, the indoor and the outdoor heat exchangers and the connecting pipes. In the conversion process that the air conditioning device is converted from a heating operating mode to a frost removing operating mode and/or from the frost removing operating mode to the heating operating mode, the expansion valve is fully opened and keep the predetermined time; the expansion valve is fully closed and keep the predetermined time; the four-way valve switches during the full open and the full closure of the expansion valve, and the compressor always operates in the whole conversion process of the operating modes. The air conditioning device of the present invention can obviously lower noise generated in the conversion process of the operating modes, and simultaneously, keeps the operation of the compressor and provides comfortable environment for users.
Description
Technical field
The present invention relates to a kind of aircondition and control method thereof, more particularly, the present invention relates to when defrosting, in the control of its expansion valve and cross valve, have the aircondition and the control method thereof of feature.
Background technology
In the prior art, aircondition generally comprises indoor set and off-premises station, and off-premises station comprises compressor, outdoor heat converter, throttling arrangement at least, and tube connector.Tube connector couples together the refrigerating circulation system of forming aircondition with these parts of these indoor sets and off-premises station.For the cold-warm type air-conditioning device, also comprise cross valve, the switching by cross valve realizes that aircondition system is warm, the mutual switching between the defrosting operation mode, makes the warm or defrosting of aircondition system.Aircondition has refrigeration, the warm defrosting of system operation mode, freezes, makes warm, defrosting running respectively.These operation modes are to be in different on-positions by cross valve 2 to realize.In this manual, when establishing cross valve 2 and being positioned at the on-position of " opening ", aircondition is in the warm operation mode of system, makes warm running; When cross valve 2 was positioned at the on-position of " pass ", aircondition was in refrigeration or defrosting operation mode, freezes or defrosts running.
When aircondition warms up operation mode in system, the pressure height of indoor heat converter, the pressure of outdoor heat converter is low.Then just in time opposite when the defrosting operation mode, the indoor set lateral pressure is low, off-premises station lateral pressure height.When aircondition was transformed into the defrosting operation mode from making warm operation mode, cross valve switched, and makes refrigerating circulation system have pressure differential because of inside, causes occurring cross valve and switches sound, just switching noise like this.Pressure reduction is big more, and the switching noise when cross valve switches is obvious more.In addition, be accompanied by the switching of cross valve, the pressure variation that produces because of pressure differential accelerates the gas-liquid two-phase body flowing velocity of cold-producing medium, can produce tangible flow of refrigerant sound.
Also have, when system was warm, cold-producing medium flow to indoor heat converter from compressor earlier, flows to outdoor heat converter from indoor heat converter through throttling arrangement again, returns compressor.And aircondition is in defrosting or when refrigeration, and cold-producing medium is to flow to outdoor heat converter from compressor earlier, flows to indoor heat converter from outdoor heat converter through throttling arrangement again, returns compressor.The flow direction of aircondition cold-producing medium when warm running of system and cooling operation is just in time opposite, when aircondition is transformed into the defrosting operation mode from making warm operation mode, or be transformed into the warm operation mode of system from the defrosting operation mode, when cross valve switches, because a large amount of cold-producing mediums in indoor heat converter or the outdoor heat converter flow back into compressor, cause appearing at the hydraulic pressure that produces under the pressure variation and contract, tangible flow of refrigerant sound also can occur.Obviously, the flow of refrigerant sound is and the direct ratio that flows into of cold-producing medium, that is to say, flowing of cold-producing medium is big more, and the flow of refrigerant sound is big more, and the mobile of cold-producing medium reduces, and the flow of refrigerant sound also reduces thereupon.
Existing aircondition is being transformed into the defrosting operation mode or is being transformed into the operation mode transfer process of the warm operation mode of system from the defrosting operation mode from making warm operation mode, cross valve switching sound and these noises of flow of refrigerant sound are bigger, the user may perceive, and thus, brings discomfort to the user.Especially flow of refrigerant sound, owing to take place in the indoor, so bigger to customer impact, the user can think the noise that indoor set produces.
For addressing the above problem, in the frequency conversion type air conditioning device, be when the defrosting operation mode begins and finishes, reduce pressure differential by the operating frequency that reduces compressor, cross valve when diminishing, pressure differential is switched.Aircondition for the immutable constant speed compressor of compressor operation frequency, owing to there is not VFC, can only reduce pressure differential by the switching that compressor leaves and closes, promptly switch under the situation that compressor shuts down, compressor is restarted then.Like this, though cross valve is switched under the less state of pressure differential, but compressor needs spended time opening again, defrosting time is elongated like this, the user can not feel well, and in addition, also energy loss can take place when restarting owing to compressor, particularly more remarkable to this influence of large-size air conditioning device, so these also are undesirable.
Therefore, need a kind of aircondition, can reduce aircondition and warm up the noise that produces the operation mode process to system to the defrosting operation mode or from the defrosting operation mode from making warm operation mode, for example cross valve switches sound and flow of refrigerant sound, keep compressor operation simultaneously, thereby for the user provides the aircondition of mute type, the environment of Creating Comfort.
Summary of the invention
An object of the present invention is to provide a kind of aircondition, it can significantly reduce the noise that aircondition occurs in the operation mode transfer process, keep compressor operation simultaneously, for the user provides comfortable environment.
One object of the present invention is to provide a kind of control method of aircondition, can significantly reduce the noise that aircondition occurs in the operation mode transfer process, keeps compressor operation simultaneously, for the user provides comfortable environment.
The invention provides a kind of aircondition, this aircondition comprises compressor at least, cross valve, indoor/outdoor heat exchangers, the tube connector that between them, connects, and the control device that above-mentioned parts are controlled, it is characterized in that, described aircondition also comprises: as the expansion valve of throttling arrangement, be transformed into the defrosting operation mode and/or warming up the operation mode transfer process of operation mode to system from making warm operation mode at described aircondition from the defrosting operation mode, described expansion valve standard-sized sheet, and keep the scheduled time, then, described expansion valve full cut-off, and keep the scheduled time; Described cross valve switches during described expansion valve is in standard-sized sheet and full cut-off; And described compressor keeps running in whole described operation mode transfer process.
In one embodiment of the invention, from the operation mode transfer process of making warm operation mode and being transformed into the defrosting operation mode, the expansion valve standard-sized sheet is full cut-off then at described aircondition, and described cross valve is at described expansion valve under the state of standard-sized sheet and switches.
In one embodiment of the invention, described aircondition is being transformed into the operation mode transfer process of the warm operation mode of system from the defrosting operation mode, and the expansion valve standard-sized sheet is full cut-off then, and described cross valve is in entirely at described expansion valve under the state of standard-sized sheet and switches.
In one embodiment of the invention, described aircondition is from make the operation mode transfer process that warm operation mode is being transformed into the defrosting operation mode, and the expansion valve standard-sized sheet is full cut-off then, and described cross valve is at described expansion valve under the state of full cut-off and switches.
In one embodiment of the invention, described aircondition is being transformed into the operation mode transfer process of the warm operation mode of system from the defrosting operation mode, and the expansion valve standard-sized sheet is full cut-off then, and described cross valve is in entirely at described expansion valve under the state of full cut-off and switches.
In one embodiment of the invention, described aircondition at described aircondition from making warm operation mode and be transformed into the defrosting operation mode and turning back to the operation mode transfer process of the warm operation mode of system from the defrosting operation mode, the expansion valve standard-sized sheet is full cut-off then, and described cross valve all is to switch under described expansion valve is in the state of standard-sized sheet.
In one embodiment of the invention, described aircondition at described aircondition from making warm operation mode and be transformed into the defrosting operation mode and turning back to the operation mode transfer process of the warm operation mode of system from the defrosting operation mode, the expansion valve standard-sized sheet is full cut-off then, and described cross valve all switches under described expansion valve is in the state of full cut-off.
In the present invention, described aircondition can further comprise checkout gear, detect temperature, pressure and/or the operating current of described compressor, wherein, during described expansion valve was in full-shut position, described checkout gear detected temperature, the pressure of described compressor and/or works when surpassing its reservation threshold, sends alarm signal, described control device receives described signal, opens described expansion valve.
The present invention also provides a kind of control method of aircondition, this aircondition comprises compressor, cross valve, indoor/outdoor heat exchangers, the tube connector that connects and the control device that above-mentioned parts are controlled at least between them, it is characterized in that described method comprises step: make throttling arrangement with expansion valve; Be transformed into the defrosting operation mode and/or warm up the operation mode transfer process of operation mode to system from making warm operation mode at described aircondition from the defrosting operation mode, described expansion valve standard-sized sheet, and keep the scheduled time, then, described expansion valve full cut-off, and keep the scheduled time; Described cross valve switches during described expansion valve is in standard-sized sheet and full cut-off; And described compressor keeps running in whole described operation mode transfer process.
Compared with prior art, aircondition of the present invention and control method thereof, can reduce aircondition effectively from making warm operation mode to the defrosting operation mode and/or be transformed into the cross valve that produces the operation mode transfer process of the warm operation mode of system from the defrosting operation mode and switch sound and flow of refrigerant sound, thereby the aircondition for the user provides mute type provides comfortable environment.Especially the aircondition of the constant speed compressor that reduces noise for shutting down by compressor, the present invention is the most suitable, and effect is more obvious.
Description of drawings
Fig. 1 illustrates the schematic diagram of aircondition of the present invention;
Fig. 2 illustrates the schematic diagram of aircondition working condition according to an embodiment of the invention;
Fig. 3 illustrates the schematic diagram of aircondition working condition according to another embodiment of the invention;
Fig. 4 illustrates the schematic diagram of aircondition working condition according to another embodiment of the invention;
Fig. 5 illustrates the schematic diagram of aircondition working condition according to another embodiment of the invention; With
Fig. 6 is the schematic flow chart of control method of the present invention.
The specific embodiment
Fig. 1 illustrates the schematic diagram of refrigerating circulation system of the present invention.In the present invention, aircondition comprises compressor 1, cross valve 2, and indoor heat converter 3, throttling arrangement 4, outdoor heat converter 5, with the tube connector 6 that is connected these parts, wherein, throttling arrangement 4 is an expansion gear, is preferably expansion valve.Aircondition also comprises control device 100, the above-mentioned parts in the aircondition are controlled, and the control aircondition freeze, make warm, defrosting is turned round and these operation modes between conversion, or the like.
In specification of the present invention, the switching that said cross valve 2 carries out, comprise aircondition from making the switching of warm operation mode cross valve 2 on-position to the transfer process of defrosting operation mode from " opening " to " passs ", also comprise aircondition from the defrosting operation mode to making the switching of warming up the on-position of cross valve 2 from " pass " to " opening " the operation mode transfer process.
In the warm operation process of the system of aircondition, control device 100 receives the temperature signal that outdoor temperature sensor 7 sends, itself and a predetermined temperature are compared, and according to comparative result, the warm running of control aircondition system or the running that defrosts.When comparative result satisfied the defrosting condition, control device 100 sent the defrosting commencing signal, and aircondition is transformed into the defrosting operation mode from making warm operation mode.Be transformed into the operation mode transfer process of defrosting operation mode from making warm operation mode at aircondition, in the time of beginning, expansion gear 4 is further opened, and is opened to full-gear, and keeps a scheduled time Δ T
OpenThen, expansion valve 4 full cut-offs, and keep a preset time Δ T
CloseDuring expansion gear 4 was in standard-sized sheet and full cut-off, cross valve 2 switched.Compressor 1 keeps running always in the transfer process of whole operation mode.Then, transfer process finishes, and expansion valve 4 is opened once more, and aircondition is in the running that begins to defrost of defrosting operation mode.
Be transformed into the operation mode transfer process of defrosting operation mode from making warm operation mode at aircondition, because expansion gear 4 standard-sized sheets, thereby the high and low pressure between pusher side and the outdoor pusher side in the balance cylinder to a great extent, pressure differential between indoor heat converter 3 and the outdoor heat converter 5 is obviously reduced, thereby reduce the inner pressure differential that exists of refrigerating circulation system greatly.Simultaneously, because when the warm running of system, indoor set lateral pressure height, the off-premises station lateral pressure is low, the standard-sized sheet of expansion gear 4 also makes the cold-producing medium in the indoor heat converter 3 flow to outdoor heat converter 5 in a large number, and the refrigerant amount in the indoor heat converter 3 reduces, like this, the refrigerant amount that flows back to compressor from indoor heat converter 3 when cross valve switches has just reduced, so reduced the appearance that hydraulic pressure contracts effectively.What next, the full cut-off of expansion gear 4 made cold-producing medium mobilely stops or reducing to very little degree.Like this, be transformed into the operation mode transfer process of defrosting operation mode from making warm operation mode at aircondition, the standard-sized sheet of expansion valve and full cut-off can reduce the pressure differential that exists in the refrigerating circulation system effectively, the liquid possibility of compressing appears in the back flow of refrigerant that reduces indoor heat converter 3, and cold-producing medium mobile is reduced to very little or stops, cross valve 2 switches during this period, and the switching sound of the cross valve 2 that just can reduce significantly also can significantly reduce the flow of refrigerant sound.Simultaneously, compressor keeps running, makes just to begin the running that defrosts when cross valve switches the operation mode transfer process end of back aircondition under the defrosting operation mode.Therefore, aircondition of the present invention can reduce cross valve effectively and switch sound and flow of refrigerant sound, particularly for particularly suitable the aircondition that reduces single constant speed compressor of making an uproar that shuts down by compressor, thereby for the user provides the aircondition of mute type, for the user provides comfortable environment.
In this manual, the aperture of described expansion valve is meant degree or the size that expansion valve is opened.Control device 100 can be set first a predetermined aperture K1 who is less than or equal to the expansion valve maximum opening, and when the aperture of expansion valve 4 surpassed or equal the first predetermined aperture K1, control device 100 assert that expansion valves 4 are standard-sized sheet.Control device 100 also can be set second a predetermined aperture T2 more than or equal to the minimum aperture of expansion valve, and when the aperture of expansion valve 4 was less than or equal to the second predetermined aperture K2, system assert that expansion valve 4 is a full cut-off.That is to say that in this manual, the standard-sized sheet of expansion valve 4 is meant that expansion valve 4 opens, aperture surpasses or equals the situation of the first predetermined aperture K1, comprises that expansion valve 4 is opened to the situation of its maximum opening; Expansion valve 4 full cut-offs are meant that expansion valve 4 is closed to the situation that is less than or equal to the second predetermined aperture K2, and the aperture that comprises expansion valve is zero or is in the situation of its minimum aperture.Obviously, K1 and K2 can be set with requiring as the case may be.
Similarly, aircondition is under the defrosting operation mode, and control device 100 receives the temperature signal that outdoor temperature sensor 7 sends, and itself and a predetermined temperature are compared, and according to comparative result, warm running of control aircondition system or row defrosting running.When the satisfied system of comparative result warmed up the operation mode condition, control device 100 sent the defrosting end signal, and aircondition is transformed into system from the defrosting operation mode and warms up operation mode.Be transformed into the operation mode transfer process of the warm operation mode of system from the defrosting operation mode at aircondition, in the time of beginning, expansion gear 4 is further opened, expansion valve 4 standard-sized sheets, and keep preset time Δ T
OpenThen, expansion valve 4 full cut-offs, and keep a preset time Δ T
CloseCross valve 2 switches during expansion gear 4 standard-sized sheets and full cut-off.Compressor 1 keeps running always in the whole process of operation mode conversion.Then, the operation mode transfer process finishes, and expansion valve 4 is opened once more, and the warm operation mode of the aircondition system of getting back to begins to make warm running.
Be transformed into the operation mode transfer process of the warm operation mode of system from the defrosting operation mode at aircondition, standard-sized sheet by expansion gear 4, thereby the high and low pressure between pusher side and the outdoor pusher side in the balance cylinder to a great extent, pressure differential between indoor heat converter 3 and the outdoor heat converter 5 is obviously reduced, thereby reduce the inner pressure differential that exists of refrigerating circulation system greatly.Simultaneously, because when the defrosting running, the indoor set lateral pressure is low, off-premises station lateral pressure height, the standard-sized sheet of expansion gear 4 also makes the cold-producing medium in the outdoor heat converter 5 flow to indoor heat converter 3 in a large number, and the refrigerant amount in the outdoor heat converter 5 reduces, like this, the refrigerant amount that flows back to compressor from outdoor heat converter 5 when cross valve switches has just reduced, so reduced the appearance that hydraulic pressure contracts effectively.What next, the full cut-off of expansion gear 4 made cold-producing medium mobilely stops or reducing to very little degree.Like this, be transformed into the operation mode transfer process of the warm operation mode of system from the defrosting operation mode at aircondition, the standard-sized sheet of expansion valve and full cut-off can reduce the pressure differential that exists in the refrigerating circulation system during this period effectively, the liquid possibility of compressing appears in the back flow of refrigerant that reduces outdoor heat converter 5, and cold-producing medium mobile is reduced to very little or stops, cross valve 2 switches during this period, the switching sound of the cross valve 2 that just can reduce significantly, and can significantly reduce the flow of refrigerant sound, simultaneously, compressor keeps running, makes just to begin to carry out the greenhouse running when cross valve switches the operation mode transfer process end of back aircondition under the warm operation mode of system.Therefore, aircondition of the present invention can reduce cross valve effectively and switch sound and flow of refrigerant sound, for the user provides the aircondition of mute type, and then provides comfortable environment for the user.
Following with reference to Fig. 2, the first embodiment of the present invention is described.As shown in Figure 2, in the present embodiment, aircondition is under the warm operation mode of system, when satisfying under the situation of defrosting condition through comparing the outdoor temperature condition, control device 100 sends the defrosting commencing signal, and aircondition is transformed into the defrosting operation mode by the warm operation mode of system.Be transformed into the operation mode transfer process of defrosting operation mode from making warm operation mode at aircondition, expansion gear 4 standard-sized sheets, and maintenance full-gear, the pressure of indoor heat converter 3 and outdoor heat converter 5 tends to balance, pressure differential in the refrigerating circulation system reduces, and the cold-producing medium of indoor heat converter 3 flows to outdoor heat converter 5 in a large number simultaneously.Cross valve 2 switches during expansion valve 4 standard-sized sheets.Then, expansion valve 4 full cut-offs, and keep preset time Δ T
Close, flow of refrigerant stops or being reduced to not half.Then, the warm operation mode of system finishes to the operation mode transfer process of defrosting operation mode, and expansion valve 4 reopens, the aircondition running that defrosts under the defrosting operation mode.In the whole process of operation mode conversion, compressor 1 keeps running always.
In the present embodiment, be transformed into the operation mode transfer process of defrosting operation mode from making warm operation mode at aircondition, cross valve 2 is to switch under the situation that is in standard-sized sheet behind expansion valve 4 standard-sized sheets.Because expansion valve 4 is in full-gear, intrasystem pressure differential reduces, thereby can effectively reduce cross valve switching sound, subsequently, expansion valve 4 full cut-offs, flow of refrigerant stops or almost stopping, and can effectively reduce the flow of refrigerant sound, thereby has tangible noise reduction.
Following with reference to Fig. 3, the second embodiment of the present invention is described.As shown in Figure 3, at present embodiment, aircondition is in to be made under the warm operation mode, and when when relatively the satisfied system of outdoor temperature condition warms up condition, aircondition still is in the warm operation mode of system, the pressure height of indoor heat converter 3, and the pressure of outdoor heat converter 5 is low.When relatively the outdoor temperature condition satisfies the defrosting condition, control device 100 sends the defrosting commencing signal, and aircondition is transformed into the defrosting operation mode by the warm operation mode of system.Be transformed into the operation mode transfer process of defrosting operation mode from making warm operation mode at aircondition, expansion gear 4 standard-sized sheets, and keep preset time Δ T
Open, the pressure between indoor heat converter 3 and the outdoor heat converter 5 tends to balance, and the pressure differential in the refrigerating circulation system reduces, and the cold-producing medium of indoor heat converter 3 flows to outdoor heat converter 5 in a large number simultaneously.Then, expansion valve 4 full cut-offs, and keep the state of full cut-off, flow of refrigerant to stop or being reduced to minimum degree.Cross valve 2 switches during expansion valve 4 full cut-offs.Then, aircondition finishes from the operation mode transfer process of making warm operation mode and being transformed into the defrosting operation mode, and expansion valve 4 reopens, the aircondition running that defrosts under the defrosting operation mode.Simultaneously, compressor 1 keeps running always in the whole process of operation mode conversion.
In the present embodiment, at aircondition from the operation mode transfer process of making warm operation mode and being transformed into the defrosting operation mode, expansion valve 4 standard-sized sheets, full cut-off then, cross valve 2 is to switch under expansion valve 4 is in the situation of full cut-off.Since the standard-sized sheet of expansion valve 4, intrasystem pressure differential minimum, then, and expansion valve 4 full cut-offs, flow of refrigerant stops or almost stopping, and thus, can significantly reduce cross valve and switch sound and flow of refrigerant sound, thereby have tangible noise reduction.
Following with reference to Fig. 4, the third embodiment of the present invention is described.As shown in Figure 4, in the present embodiment, aircondition is under the defrosting operation mode, and when the satisfied system of outdoor temperature condition warmed up condition, control device 100 sent the defrosting end signal, and aircondition turns back to system from the defrosting operation mode and warms up operation mode.Turn back to the operation mode transfer process of the warm operation mode of system from the defrosting operation mode at aircondition, expansion gear 4 standard-sized sheets, and maintenance full-gear, the pressure of indoor heat converter 3 and outdoor heat converter 5 tends to balance, pressure differential in the refrigerating circulation system reduces, and the cold-producing medium of outdoor heat converter 5 flows to indoor heat converter 3 in a large number simultaneously.Cross valve 2 keeps switching during the standard-sized sheet at expansion gear 4.Then, expansion valve 4 full cut-offs, and keep preset time Δ T
Close, flow of refrigerant stops or being reduced to not half.Then, the operation mode transfer process finishes, and expansion valve 4 reopens, and aircondition turns back to the warm running of the warm operation mode system of system.In whole operation mode transfer process, compressor keeps running always.
In the present embodiment, be transformed into the operation mode transfer process of the warm operation mode of system from the defrosting operation mode at aircondition, cross valve 2 is to switch under the state that is in standard-sized sheet behind expansion valve 4 standard-sized sheets.Because expansion valve 4 keeps standard-sized sheet, intrasystem pressure differential reduces, thereby can effectively reduce cross valve switching sound, subsequently, expansion valve 4 full cut-offs, flow of refrigerant stops or almost stopping, and can effectively reduce the flow of refrigerant sound, thereby has tangible noise reduction.
Following with reference to Fig. 5, the fourth embodiment of the present invention is described.As shown in Figure 5, at present embodiment, aircondition is under the defrosting operation mode, and when when relatively the outdoor temperature condition satisfies the defrosting condition, aircondition still is in the defrosting operation mode, the pressure height of outdoor heat converter 5, and indoor heat converter 3 pressure are low.When the satisfied system of outdoor temperature condition warmed up condition, control device 100 sent the defrosting end signal, and aircondition turns back to system by the defrosting operation mode and warms up operation mode.Turn back to the operation mode transfer process of the warm operation mode of system from the defrosting operation mode at aircondition, expansion gear 4 standard-sized sheets, and keep predetermined section time Δ T
Open, the pressure of indoor heat converter 3 and outdoor heat converter 5 tends to balance, and the pressure differential in the refrigerating circulation system reduces, and the cold-producing medium of outdoor heat converter 5 flows to indoor heat converter 3 in a large number simultaneously.Then, expansion valve 4 full cut-offs, and keep the state of full cut-off, flow of refrigerant to stop or being reduced to not half.Cross valve 2 keeps switching during the full cut-off at expansion valve 4.Then, the operation mode transfer process finishes, and expansion valve 4 reopens, and aircondition carries out the greenhouse running under the warm operation mode of system.In the whole process of operation mode conversion, compressor 1 keeps running always.
In the present embodiment, be transformed into the operation mode transfer process of the warm operation mode of system from the defrosting operation mode at aircondition, cross valve 2 is to switch under the state that is in full cut-off after expansion valve 4 standard-sized sheets, the full cut-off.Because expansion valve 4 standard-sized sheets, intrasystem pressure differential reduces, then, expansion valve 4 full cut-offs, flow of refrigerant stops or almost stopping, and thus, can significantly reduce cross valve and switch sound and flow of refrigerant sound, thereby have tangible noise reduction.
Following with reference to Fig. 2 and Fig. 4, another embodiment of the present invention is described.As shown in Figure 2, in the present embodiment, aircondition is in the warm operation mode of system, and when the outdoor temperature condition satisfied the defrosting condition, control device 100 sent the defrosting commencing signal, and aircondition is transformed into the defrosting operation mode by the warm operation mode of system.Be transformed in the operation mode transfer process of defrosting operation mode by the warm operation mode of system at aircondition, expansion gear 4 standard-sized sheets, and keep full-gear.During expansion valve 4 kept full-gear, cross valve 2 switched.Next, expansion valve 4 full cut-offs, and keep preset time Δ T
CloseThen, transfer process finishes, and expansion valve 4 reopens, and aircondition is in the running that defrosts of defrosting operation mode.Simultaneously, compressor 1 keeps running always in whole transfer process.
As shown in Figure 4, aircondition is under the defrosting operation mode, and when when relatively the satisfied system of outdoor temperature condition warms up condition, control device 100 sends the defrosting end signal, and aircondition turns back to system by the defrosting operation mode and warms up operation mode.Turn back to the operation mode transfer process of the warm operation mode of system from the defrosting operation mode at aircondition, expansion gear 4 standard-sized sheets, and keep full-gear.During expansion valve 4 hold modes, cross valve 2 switches.Next, expansion valve 4 full cut-offs, and keep preset time Δ T
CloseThen, transfer process finishes, and expansion valve 4 reopens, and aircondition is made warm running under the warm operation mode of system.Simultaneously, compressor 1 keeps running always in whole transfer process.
In the present embodiment, warm up operation mode at aircondition to the operation mode transfer process of defrosting operation mode from making, expansion valve 4 standard-sized sheets, full cut-off, cross valve 2 is to switch under the state that is in standard-sized sheet behind expansion valve 4 standard-sized sheets, make the operation mode transfer process that warms up operation mode with returning from the defrosting operation mode, expansion valve 4 standard-sized sheets, full cut-off, cross valve 2 are to switch under the state that is in standard-sized sheet behind expansion valve 4 standard-sized sheets.Because expansion valve 4 is in full-gear, intrasystem pressure differential reduces, thereby can effectively reduce cross valve switching sound, subsequently, expansion valve 4 full cut-offs, flow of refrigerant stops or almost stopping, and effectively reduces the flow of refrigerant sound, thereby has tangible noise reduction.
Following with reference to Fig. 3 and Fig. 5, another embodiment of the present invention is described.As shown in Figure 3, in the present embodiment, aircondition is in to be made under the warm operation mode, and when when relatively the satisfied system of outdoor temperature condition warms up condition, aircondition still is in the warm operation mode of system.When the outdoor temperature condition satisfied the defrosting condition, control device 100 sent the defrosting commencing signal, and aircondition is transformed into the defrosting operation mode by the warm operation mode of system.Be transformed into the operation mode transfer process of defrosting operation mode from making warm operation mode at aircondition, expansion gear 4 standard-sized sheets, and keep scheduled time Δ T
OpenThen, expansion valve 4 full cut-offs, and keep full cut-off.During expansion valve 4 kept full-shut position, cross valve 2 switched.Then, the operation mode transfer process finishes, and expansion valve 4 reopens, the aircondition running that defrosts under the defrosting operation mode.In whole operation mode transfer process, compressor 1 keeps running always.
In Fig. 5, aircondition is under the defrosting operation mode, and when when relatively the satisfied system of outdoor temperature condition warms up condition, control device 100 sends the defrosting end signal, and aircondition turns back to system by the defrosting operation mode and warms up operation mode.Turn back to the running die change formula transfer process of the warm operation mode of system from the defrosting operation mode at aircondition, expansion gear 4 standard-sized sheets, and keep scheduled time Δ T
OpenThen, expansion valve 4 full cut-offs, and keep full cut-off.During expansion valve 4 kept full cut-off, cross valve 2 switched.Then, the operation mode transfer process finishes, and expansion valve 4 reopens, the warm running of the warm operation mode system of the aircondition system of getting back to.Simultaneously, compressor 1 keeps running always in the whole process of operation mode conversion.
In the present embodiment, be transformed into the operation mode transfer process of defrosting operation mode from making warm operation mode at aircondition, expansion valve 4 standard-sized sheets, follow full cut-off, cross valve 2 switches during expansion valve 4 is in full-shut position, with the operation mode transfer process that warms up operation mode in the system of returning from the defrosting operation mode, expansion valve 4 standard-sized sheets, full cut-off, cross valve 2 switches during expansion valve 4 keeps full-shut positions.Because the pressure differential minimum in expansion valve 4 standard-sized sheets, refrigerating circulation system, expansion valve full cut-off, flow of refrigerant stop or almost stopping, and thus, can significantly reduce cross valve and switch sound and flow of refrigerant sound, thereby have tangible noise reduction.
Will be understood that expansion valve 4 keeps the preset time Δ T of standard-sized sheet
OpenAnd the preset time Δ T of maintenance full cut-off
Close, can be the same or different, but all must switch required time more than or equal to cross valve.Obviously, this can be as the case may be determines with requiring, as being determined according to the scale of aircondition, refrigerating capacity or the like.
Though, more than aircondition of the present invention is illustrated, and enumerated some embodiment.But, in connotation of the present invention and scope, other variation can be arranged also.Such as, for aircondition of the present invention, change to the operation mode transfer process of defrosting operation mode from making warm operation mode at aircondition, expansion valve 4 standard-sized sheets, full cut-off, cross valve 2 can switch under expansion valve 4 is in the situation of full cut-off and change to the operation mode transfer process of the warm operation mode of system from the defrosting operation mode, expansion valve 4 standard-sized sheets, full cut-off, cross valve 2 is at expansion valve 4 under the situation of standard-sized sheet and switches, and vice versa, or the like.This can be selected with needs as the case may be.
In the operation mode transfer process of aircondition, as being transformed into the defrosting operation mode from making warm operation mode, or be transformed into the warm operation mode of system from the defrosting operation mode, when compressor 1 keeps running and expansion valve 4 is under the situation of cutting out, the temperature that spues in compressor 1 exit raises very fast, might surpass its rated value, make compressor 1 operation irregularity occur, cause compressor 1 to shut down.Obviously, compressor 1 is at expansion valve 4 under the situation of cutting out and keeps running, and expansion valve 4 is in to cut out and also may causes other situation that compressor 1 operation irregularity occurs causing, surpasses normal value as the pressure at compressor outlet place, or the like.Therefore, control device 100 of the present invention also can comprise checkout gear, and whether temperature, pressure or the operating current etc. that are used for detecting compressor surpass its reservation threshold.In the transfer process of aircondition operation mode, be at expansion valve 4 under the situation of full cut-off, if checkout gear detect compressor 1 temperature, pressure or operating current etc. surpass its reservation threshold, just send alarm signal, control device 100 receives this alarm signal, opens expansion valve 4, makes temperature, pressure or the operating current of compressor 1 recover normal, it is unusual to prevent that compressor 1 work from occurring, and guarantees that compressor 1 is in normal operation.Obviously, reservation threshold can be set at is less than or equal to the unusual rated value of compressor 1 work appearance, and this is decided by concrete condition and requirement.
Checkout gear can comprise at least one sensor, is used for detecting at least one working condition of compressor, and will detect data and compare with corresponding reservation threshold.When comparative result is when surpassing reservation threshold, checkout gear 7 sends error signals.Obviously, number of sensors in the checkout gear, position and test item etc. can be determined with requiring as the case may be.
The present invention also provides a kind of control method of aircondition.In a preferred embodiment of control method of the present invention, aircondition comprises compressor 1, cross valve 2, and indoor heat converter 3, throttling arrangement 4, indoor heat converter 5, with the tube connector 6 that is connected these parts, wherein, throttling arrangement 4 is an expansion valve.Aircondition also comprises control device 100, and the above-mentioned parts in the aircondition are controlled, and the control aircondition freezes, makes the conversion of warming up, defrosting between running and these operation modes, or the like.
Referring now to Fig. 6, control method of the present invention is described.As shown in Figure 6, in the method for the invention, aircondition is in the warm operation mode of system, control device 100 receives the temperature signal that outdoor temperature sensor 7 sends, itself and a predetermined temperature are compared, and according to comparative result, warm running of control aircondition system or row defrosting running.When the outdoor temperature condition satisfied the defrosting condition, control device 100 sent the defrosting commencing signal.In step 110, aircondition is from making the operation mode transfer process that warm operation mode is transformed into the defrosting operation mode.In the initial time that the operation mode transfer process of making warm operation mode and being transformed into the defrosting operation mode begins, in step 120, expansion gear 4 is further opened, expansion valve 4 standard-sized sheets, and maintenance preset time Δ T at aircondition
Open, the pressure of indoor heat converter 3 and outdoor heat converter 5 tends to balance, and the pressure differential in the refrigerating circulation system reduces, and the cold-producing medium of indoor heat converter 3 flows to outdoor heat converter 5 in a large number simultaneously.Next, in step 130, expansion valve 4 full cut-offs, and keep a preset time Δ T
Close, flow of refrigerant stops or being reduced to not half.During expansion gear 4 standard-sized sheets and full cut-off, in step 140, cross valve 2 switches.Then, in step 160, aircondition finishes to the operation mode transfer process of defrosting operation mode from making warm operation mode, and expansion valve 4 is opened once more, and aircondition is in the running that defrosts of defrosting operation mode.Simultaneously, in the whole process of operation mode conversion, in step 150, compressor 1 keeps running always.
Control method of the present invention, aircondition is transformed into the operation mode transfer process of defrosting operation mode expansion valve 4 standard-sized sheets, full cut-off from making warm operation mode.The standard-sized sheet of expansion valve, can reduce the pressure differential that exists in the refrigerating circulation system effectively, the liquid possibility of compressing appears in the back flow of refrigerant that reduces indoor heat converter 3, the expansion valve full cut-off, cold-producing medium mobile is reduced to very little or stops, cross valve 2 switches during this period, the switching sound of the cross valve 2 that just can reduce significantly, and can significantly reduce the flow of refrigerant sound, simultaneously, compressor keeps running, makes just to begin the running that defrosts when cross valve switches the operation mode transfer process end of back aircondition under the defrosting operation mode.Therefore, control method of the present invention can reduce cross valve effectively and switch sound and flow of refrigerant sound, is particularly useful for the aircondition of constant speed compressor, and effect is more obvious, thereby, and then provide comfortable environment for the user for the user provides the aircondition of mute type.
An embodiment of control method of the present invention is described referring now to Fig. 2 and Fig. 6.In the present embodiment, aircondition is under the warm operation mode of system, and aircondition is being transformed into the operation mode transfer process of defrosting operation mode from making warm operation mode, and cross valve 2 is in behind the expansion valve standard-sized sheet that the state of standard-sized sheet switches.That is, in step 110, transfer process begins.In step 120, expansion valve 4 standard-sized sheets, and keep full-gear.In step 140, during expansion valve 4 kept full-gear, cross valve 2 switched.Next, in step 130, expansion valve 4 full cut-offs, and keep preset time Δ T
CloseThen, in step 160, aircondition is from making the operation mode transfer process end of warm operation mode to the defrosting operation mode, and expansion valve 4 is opened, and aircondition is in the defrosting operation mode.Simultaneously, in step 150, compressor 1 keeps running always in the transfer process of whole operation mode.
In the present embodiment, be transformed into the operation mode transfer process of defrosting operation mode from making warm operation mode at aircondition, cross valve 2 switches during expansion valve 4 is in standard-sized sheet, expansion valve 4 cuts out then, thus, can effectively reduce cross valve and switch sound and flow of refrigerant sound, thereby have tangible noise reduction.
Another embodiment of control method of the present invention is described referring now to Fig. 3 and Fig. 6.In the present embodiment, aircondition is under the warm operation mode of system, and aircondition is being transformed into the operation mode transfer process of defrosting operation mode from making warm operation mode, and cross valve 2 is in after the expansion valve full cut-off that full-shut position switches.That is, in step 110, the operation mode transfer process begins, in step 120, and expansion valve 4 standard-sized sheets, and keep preset time Δ T
OpenNext, in step 130, expansion valve 4 full cut-offs, and keep full-shut position; Then, in step 140, during expansion valve 4 kept full-shut position, cross valve 2 switched; Then, in step 160, aircondition is from making the operation mode transfer process end of warm operation mode to the defrosting operation mode, and expansion valve 4 is opened, and aircondition is in the defrosting operation mode.Simultaneously, in step 150, compressor 1 keeps running always in the transfer process of whole operation mode.
In the present embodiment, be transformed into the operation mode transfer process of defrosting operation mode from making warm operation mode at aircondition, expansion valve 4 standard-sized sheets, full cut-off, cross valve 2 switches during expansion valve 4 is in full cut-off, the cross valve standard-sized sheet, pressure differential in the system reduces, the cross valve full cut-off, the flow of refrigerant minimum, thus, can significantly reduce cross valve and switch sound and flow of refrigerant sound, thereby have tangible noise reduction.
The present invention also provides a kind of control method of aircondition.Now continue control method of the present invention to be described with reference to Fig. 6.In this control method, aircondition is in the defrosting operation mode, and when the satisfied system of outdoor temperature condition warmed up condition, control device 100 sent the defrosting end signal.In step 110, aircondition is transformed into the operation mode transfer process of the warm operation mode of system from the defrosting operation mode.In step 120, expansion gear 4 is further opened, expansion valve 4 standard-sized sheets, and keep preset time Δ T
Open, the pressure between indoor heat converter 3 and the outdoor heat converter 5 tends to balance, and the pressure differential in the refrigerating circulation system reduces, and the cold-producing medium of outdoor heat converter 5 flows to indoor heat converter 3 in a large number simultaneously.Next, in step 130, expansion valve 4 full cut-offs, and keep a preset time Δ T
Close, flow of refrigerant stops or being reduced to not half.During expansion gear 4 standard-sized sheets and full cut-off, in step 140, cross valve 2 switches.Then, in step 160, the operation mode transfer process of aircondition from the defrosting operation mode to the warm operation mode of system finishes, and expansion valve 4 is opened once more, and aircondition is in the warm operation mode of system.Simultaneously, in step 150, compressor 1 keeps running always in the whole process of operation mode conversion.
An embodiment in control method of the present invention, aircondition is under the defrosting operation mode, aircondition is being transformed into the operation mode transfer process of the warm operation mode of system from the defrosting operation mode, and cross valve 2 switches under the situation that is in standard-sized sheet behind the expansion valve standard-sized sheet.That is, transfer process begins, expansion valve 4 standard-sized sheets, and keep full-gear; Cross valve 2 switches; Next, expansion valve 4 full cut-offs, and keep preset time Δ T
CloseThen, the operation mode transfer process of aircondition from the defrosting operation mode to the warm operation mode of system finishes, and expansion valve 4 is opened, and aircondition is in the warm operation mode of system.Simultaneously, compressor 1 keeps running always in the transfer process of whole operation mode.
An embodiment in control method of the present invention, aircondition is under the defrosting operation mode, aircondition is being transformed into the operation mode transfer process of the warm operation mode of system from the defrosting operation mode, and cross valve 2 switches under the situation that is in full cut-off after the expansion valve full cut-off.That is, transfer process begins, expansion valve 4 standard-sized sheets, and keep preset time Δ T
OpenNext, expansion valve 4 full cut-offs, and keep full-shut position; Cross valve 2 switches; Then, the operation mode transfer process of aircondition from the defrosting operation mode to the warm operation mode of system finishes, and expansion valve 4 is opened, and aircondition is in the warm operation mode of system.Simultaneously, compressor 1 keeps running always in the transfer process of whole operation mode.
The present invention also provides a kind of control method of aircondition.In the method for the invention, be transformed into the operation mode transfer process of defrosting operation mode from making warm operation mode at aircondition, expansion valve 4 standard-sized sheets also keep the scheduled time, then full cut-off and keeping the scheduled time, cross valve 2 is at expansion valve and switches under the state of standard-sized sheet, make the operation mode transfer process that warms up operation mode with turning back to from the defrosting operation mode at aircondition, expansion valve 4 standard-sized sheets also keep the scheduled time, then full cut-off and keeping the scheduled time, cross valve 2 switches during expansion valve keeps standard-sized sheet, shown in Fig. 2,4 and 6.
The present invention also provides a kind of control method of aircondition.In the method for the invention, be transformed into the operation mode transfer process of defrosting operation mode from making warm operation mode at aircondition, expansion valve 4 standard-sized sheets also keep the scheduled time, full cut-off and keeping the scheduled time then, cross valve 2 is at expansion valve and switches under the state of full cut-off, make the operation mode transfer process that warms up operation mode with turning back to from the defrosting operation mode at aircondition, expansion valve 4 standard-sized sheets also keep the scheduled time, full cut-off and keeping the scheduled time then, cross valve 2 switches during expansion valve keeps full cut-off, shown in Fig. 3,5 and 6.
The present invention also provides a kind of control method of aircondition.In the method for the invention, be transformed into the operation mode transfer process of defrosting operation mode from making warm operation mode at aircondition, expansion valve 4 standard-sized sheets also keep the scheduled time, full cut-off also keeps the scheduled time, cross valve 2 switches during keeping full-shut position after the expansion valve full cut-off, make the operation mode transfer process that warms up operation mode with turning back to from the defrosting operation mode at aircondition, expansion valve 4 standard-sized sheets also keep the scheduled time, full cut-off also keeps the scheduled time, cross valve 2 switches under the state that is in standard-sized sheet behind the expansion valve standard-sized sheet, as Fig. 3, shown in 4 and 6.
The present invention also provides a kind of control method of aircondition.In the method for the invention, be transformed into the operation mode transfer process of defrosting operation mode from making warm operation mode at aircondition, expansion valve 4 standard-sized sheets also keep the scheduled time, full cut-off also keeps the scheduled time, cross valve 2 switches during keeping full-gear behind the expansion valve standard-sized sheet, make the operation mode transfer process that warms up operation mode with turning back to from the defrosting operation mode at aircondition, expansion valve 4 standard-sized sheets also keep the scheduled time, full cut-off also keeps the scheduled time, cross valve 2 switches under the state that is in full cut-off after the expansion valve full cut-off, as Fig. 2, shown in 5 and 6.
Control method of the present invention can comprise that also whether the temperature that detects the compressor outlet place with a checkout gear surpasses the step of a reservation threshold.In the transfer process of operation mode, expansion valve is under the situation of cutting out, when the temperature that checkout gear detects compressor 1 exit surpasses its reservation threshold, send alarm signal, control device 100 receives this alarm signal, opens expansion valve 4, and the temperature in compressor 1 exit is fallen after rise, thereby it is unusual to prevent that compressor 1 work from occurring, the normal operation that keeps compressor 1.Obviously, method of the present invention can comprise that also the checkout gear with other detects the step that other unusual situation of compressor operating whether occurs causing.
Though, more than by embodiment refrigerating circulation system of the present invention and control method thereof are illustrated.But, will be understood that those skilled in the art can change the present invention or improve under the situation that does not depart from connotation of the present invention and scope.These changes and improvements all should fall within the scope of the present invention.
Claims (8)
1. an aircondition comprises compressor, cross valve, indoor/outdoor heat exchangers, the tube connector that connects and the control device that above-mentioned parts are controlled at least between them, it is characterized in that described aircondition also comprises:
Expansion valve as throttling arrangement, be transformed into the defrosting operation mode and/or warm up the operation mode transfer process of operation mode to system from making warm operation mode at described aircondition from the defrosting operation mode, described expansion valve standard-sized sheet, and keep the scheduled time, then, described expansion valve full cut-off, and keep the scheduled time;
Described cross valve switches during described expansion valve is in standard-sized sheet and full cut-off; And described compressor keeps running in whole described operation mode transfer process.
2. aircondition as claimed in claim 1 is characterized in that, described cross valve from make the operation mode transfer process that warm operation mode is being transformed into the defrosting operation mode, is at described expansion valve under the state of standard-sized sheet and switches.
3. aircondition as claimed in claim 1 is characterized in that, described cross valve is being transformed into the operation mode transfer process of the warm operation mode of system from the defrosting operation mode, is at described expansion valve under the state of standard-sized sheet to switch.
4. aircondition as claimed in claim 1 is characterized in that, described cross valve from make the operation mode transfer process that warm operation mode is being transformed into the defrosting operation mode, is at described expansion valve under the state of full cut-off and switches.
5. aircondition as claimed in claim 1 is characterized in that, described cross valve is being transformed into the operation mode transfer process of the warm operation mode of system from the defrosting operation mode, is at described expansion valve under the state of full cut-off to switch.
6. aircondition as claimed in claim 1, it is characterized in that, described cross valve, from making warm operation mode and be transformed into the defrosting operation mode and turning back to the operation mode transfer process of the warm operation mode of system from the defrosting operation mode, all is to switch under described expansion valve is in the state of standard-sized sheet at described aircondition.
7. aircondition as claimed in claim 1, it is characterized in that, described cross valve, from making warm operation mode and be transformed into the defrosting operation mode and turning back to the operation mode transfer process of the warm operation mode of system from the defrosting operation mode, all is to switch under described expansion valve is in the state of full cut-off at described aircondition.
8. as any one described aircondition of claim 1-7, it is characterized in that, described aircondition further comprises checkout gear, detect temperature, pressure and/or the operating current of described compressor, wherein, during described expansion valve is in full-shut position, when temperature, pressure and/or the operating current that described checkout gear detects described compressor surpasses its reservation threshold, send alarm signal, described control device receives described signal, opens described expansion valve.
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| CNB200510007354XA CN100370200C (en) | 2005-02-04 | 2005-02-04 | Air-conditioner |
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| CNB200510007354XA CN100370200C (en) | 2005-02-04 | 2005-02-04 | Air-conditioner |
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| CN100370200C true CN100370200C (en) | 2008-02-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| AU2010253331B2 (en) * | 2009-05-29 | 2013-04-11 | Daikin Industries, Ltd. | Air conditioner |
| CN104976809A (en) * | 2014-04-14 | 2015-10-14 | 大金工业株式会社 | Refrigerating device |
| CN104748316B (en) * | 2015-03-31 | 2017-06-06 | 广东美的制冷设备有限公司 | The control method of compressor electric motor, control device in air-conditioner and air-conditioner |
| JP6123853B2 (en) * | 2015-08-18 | 2017-05-10 | ダイキン工業株式会社 | air conditioner |
| CN107490208B (en) * | 2017-09-04 | 2023-05-19 | 广东芬尼克兹节能设备有限公司 | Refrigerant recovery control system of heat pump unit and control method thereof |
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| JPH11182994A (en) * | 1997-12-18 | 1999-07-06 | Toshiba Corp | Air conditioner |
| JP2003156243A (en) * | 2001-11-20 | 2003-05-30 | Fujitsu General Ltd | Control method for air-conditioner |
| JP2003240391A (en) * | 2002-02-21 | 2003-08-27 | Mitsubishi Electric Corp | Air conditioner |
| CN2665580Y (en) * | 2003-12-05 | 2004-12-22 | 清华大学 | Parallel connection heat pump conditioning unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11182994A (en) * | 1997-12-18 | 1999-07-06 | Toshiba Corp | Air conditioner |
| JP2003156243A (en) * | 2001-11-20 | 2003-05-30 | Fujitsu General Ltd | Control method for air-conditioner |
| JP2003240391A (en) * | 2002-02-21 | 2003-08-27 | Mitsubishi Electric Corp | Air conditioner |
| CN2665580Y (en) * | 2003-12-05 | 2004-12-22 | 清华大学 | Parallel connection heat pump conditioning unit |
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