EP2843118B1 - Appareil de traitement de linge à pompe à chaleur et procédé de fonctionnement d'un compresseur - Google Patents

Appareil de traitement de linge à pompe à chaleur et procédé de fonctionnement d'un compresseur Download PDF

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Publication number
EP2843118B1
EP2843118B1 EP13181947.6A EP13181947A EP2843118B1 EP 2843118 B1 EP2843118 B1 EP 2843118B1 EP 13181947 A EP13181947 A EP 13181947A EP 2843118 B1 EP2843118 B1 EP 2843118B1
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EP
European Patent Office
Prior art keywords
compressor
cooling fan
predetermined
thresh
comp
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EP13181947.6A
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German (de)
English (en)
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EP2843118A1 (fr
Inventor
Paolo Driussi
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Electrolux Appliances AB
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Electrolux Appliances AB
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Priority to EP13181947.6A priority Critical patent/EP2843118B1/fr
Priority to PL13181947T priority patent/PL2843118T3/pl
Publication of EP2843118A1 publication Critical patent/EP2843118A1/fr
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/32—Control of operations performed in domestic laundry dryers 
    • D06F58/34—Control of operations performed in domestic laundry dryers  characterised by the purpose or target of the control
    • D06F58/36—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry
    • D06F58/38—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry of drying, e.g. to achieve the target humidity
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/28—Air properties
    • D06F2103/36—Flow or velocity
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/44—Current or voltage
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/50—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers related to heat pumps, e.g. pressure or flow rate
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/54—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers related to blowers or fans
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/16—Air properties
    • D06F2105/24—Flow or velocity
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/26—Heat pumps
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/32—Air flow control means
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F25/00—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry and having further drying means, e.g. using hot air 
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/206—Heat pump arrangements

Definitions

  • the invention relates to a method of operating a compressor in a heat-pump laundry treatment apparatus, in particular a heat-pump laundry dryer or a heat-pump washer-dryer. Further the invention relates to a laundry treatment apparatus having a control unit adapted to control the operation of the laundry treatment apparatus.
  • EP 1 541 745 B1 discloses a heat pump laundry dryer comprising a heat pump system including a compressor which is adapted to circulate a refrigerant through the heat-pump system. Furthermore, the laundry dryer comprises a drum having therein laundry, and a process air path for guiding process air or drying air to the rotary drum. The dryer also comprises a blower for blowing the drying air to the process air path independent of the rotation of the drum and the operation of the compressor. After stopping the compressor operation and when resuming a drying operation, the compressor is restarted only after waiting the lapse of a predetermined period since the time of stopping the compressor. A controller is used for controlling operation of the dryer, in particular for operating the blower and the compressor.
  • EP 2 527 520 A1 which discloses a method according to the preamble of claim 1, relates to a heat-pump dryer having safety elements that react on operation conditions of the refrigerant within the heat-pump system.
  • the operation mode of the heat-pump system is modified to effect reduction of the refrigerant pressure.
  • One of the modifications provides that the compressor is switched off for a predetermined time until pressure equilibration is achieved. Also between deactivation and activation of the compressor of consecutive programs it is checked whether there is an equilibration of refrigerant pressure between high and low pressure side.
  • the motor of the compressor may have an overcurrent sensor.
  • the refrigerant temperature, the refrigerant pressure and the compressor power consumption are monitored. If the parameters reach a predetermined threshold the compressor is shut off.
  • a heat pump laundry treatment apparatus comprises a heat-pump system having a compressor which is adapted to circulate a refrigerant through the heat-pump system during a laundry drying operation. Furthermore, the heat pump laundry treatment apparatus comprises a control unit controlling the operation of the heat pump laundry treatment apparatus.
  • the heat pump laundry treatment apparatus - in the following description also denoted in brief "apparatus" - is in particular configured as a heat pump laundry dryer or a heat pump washing machine having a drying function (washer-dryer).
  • the method of operating the compressor comprises at least the following:
  • the operation mode "suspended” does include also the operation mode "stopped”. Basically this means that in these cases the compressor is in the status "OFF', i.e. not active.
  • Monitoring the value of power or current and switching the operation mode (maintaining and suspending) of the compressor is preferably made by a control unit. Particularly, this unit is part of the control unit controlling the (overall) operation of the apparatus.
  • Suspension of the compressor operation may depend on predetermined conditions.
  • the compressor operation will be suspended, if the drying cycle/drying operation is suspended and/or if a safety threshold temperature of the heat-pump system is exceeded (e.g. compressor temperature or refrigerant temperature, particularly refrigerant temperature at the compressor outlet).
  • Compressor operation may also be suspended upon user Suspension of the compressor operation may depend on predetermined conditions.
  • the compressor operation will be suspended, if the drying cycle/drying operation is suspended and/or if a safety threshold temperature of the heat-pump system is exceeded (e.g. compressor temperature or refrigerant temperature, particularly refrigerant temperature at the compressor outlet).
  • Compressor operation may also be suspended upon user interaction, for example by pressing a pause button or if the user opens a loading opening for adding or removing parts of the laundry to be dried.
  • Maintaining and suspending again the restarted compressor operation is made depending on a predetermined value of the power or current. I.e., the restarted compressor operation is maintained (continued), if the monitored value of the power or current is lower than the predetermined value, and the compressor operation is suspended again, if the monitored value of the monitored power or current is equal or higher than the predetermined value.
  • the value of power or current supplied to the compressor after restarting the compressor operation is monitored for a predetermined delay time period and/or is monitored at a predetermined delay time after restarting the compressor operation.
  • the decision/determination to maintain or suspend again the compressor operation is made in dependency of this monitored value.
  • the predetermined delay time period and/or the predetermined delay time ensures easily a correct evaluation of the compressor's performance status in comparison to its nominal performance whereby achieving the nominal performance value is necessary to maintain the compressor operation after its restart.
  • the delay time period or delay time is defined in the range of milliseconds lower than one second or some seconds (e.g. two seconds).
  • the compressor operation is restarted upon receiving a restarting signal.
  • the restarting signal is initiated manually by a user giving a start signal to a control switch, control panel or the like, and/or by the control unit.
  • the control unit initiates the restarting signal if predetermined conditions and/or circumstances are fulfilled. For example, the control unit detects resumption/restart of a suspended drying operation and subsequently initiates the restarting signal.
  • the compressor operation is restarted a second time after expiry of a predetermined suspension time period.
  • This suspension time period is set accordingly.
  • the suspension time period is predefined as some seconds, particularly two seconds.
  • the second-time restarted compressor operation is maintained and suspended according to the condition for the first time of restart of the compressor operation. If the compressor operation is suspended again after the second time of restart, the compressor operation is preferably restarted (and suspended again if necessary) further times as long as the needed nominal operation conditions have been achieved.
  • the restarted standard operation of the compressor can be achieved by a sequence or loop of switching (ON and OFF) the com-pressor operation status. This switching is repeated as long as the compressor is operating again by a power or current absorption corresponding to nominal conditions, particularly lower than the predetermined value of power or current.
  • a successful restart of the compressor operation is achievable even after a few retrials to re-start successfully the compressor, particularly already some seconds after the first-time re-start of the compressor.
  • the predetermined delay time period (and/or predetermined delay time) and the predetermined suspension time period have equal values.
  • the values can be predetermined in the range of milliseconds lower than one second or in the range of some seconds (e.g. two seconds).
  • the restarting procedure supports a quick successful restart of the com-pressor operation.
  • the apparatus comprises a cooling fan for cooling a component of the heat-pump system, in particular and preferably the compressor.
  • the cooling fan is adapted to convey cooling air over one component and (if applicable) also over other heat-pump system components.
  • the cooling air may be conveyed through or over the component(s) wherein the cooling fan may be arranged upstream or downstream of the heat-pump system component.
  • Operating the cooling fan offers an efficient support in achieving the nominal conditions of the heat-pump system, particularly of the compressor, which are needed for a quick successful restart of the compressor operation after suspending the compressor operation.
  • a unit for controlling the operation of the cooling fan is adapted such that the conveyance capacity (which can also be denoted as cooling capacity) of the cooling fan varied or adjusted depending on operation conditions of the apparatus.
  • the cooling fan is controlled by the already mentioned control unit controlling the overall operation of the apparatus.
  • the method of operating the cooling fan comprises at least the following modes:
  • This cooling routine allows cooling at least a portion/component of the heat-pump system after suspending compressor operation.
  • Such component may be any part of the heat-pump system, in particular the compressor or an auxiliary condenser. Consequently, this cooling routine increases the probability in successfully restarting the heat-pump system, in particular for successfully restarting the compressor. In particular the chance for restarting the compressor is improved by using a cooling fan operation.
  • a quick successful restart of the compressor operation is supported by the cooling fan operation, even after a very short time period after ending a previous drying operation (the compressor is stopped at the end of the previous drying operation) and/or after a short time period when the compressor operation has been suspended in a running (but presently suspended) drying process.
  • the cooling fan operation (particularly having the increased conveyance rate) remains for a predetermined period after the suspension of the compressor operation.
  • continuation of fan operation for the predetermined (time) period is independent of any other or of additional conditions. E.g. operating the fan for the predetermined time period is started immediately after detecting the suspension of the compressor operation. In other embodiments, this time period is running dependent on predefined additional conditions. For example, the predetermined period is running if predefined temperature conditions of the refrigerant and/or the compressor are fulfilled.
  • the cooling fan operation after suspending the compressor operation is controlled by temperature detection and comparison with a temperature threshold value.
  • the predetermined threshold value can be different - depending on the operation mode of the heat-pump system/compressor.
  • two different threshold values can be defined as follows:
  • Controlling the fan operation using the two different temperature threshold values provides a further possibility to extend cooling operation during suspension of the compressor.
  • the second temperature threshold value used during suspension of the compressor is lower than the first temperature threshold value used during compressor operation (not suspended) and consequently the cooling fan is switched inactive (status "OFF") during compressor suspension not until the temperature of the compressor is lower than the second temperature threshold value.
  • the temperature threshold value corresponds to the lowered second temperature threshold value during heat-pump system/compressor suspension
  • This change can be made as soon as the resumption (i.e. restart) is detected or alternatively when a predetermined time interval has expired after the resumption.
  • the compressor suspension is cancelled in order to resume (i.e. restart) the compressor operation and this resumption is combined with maintaining the cooling fan operation (i.e. active cooling fan) or maintaining the cooling fan operation at the increased conveyance rate for a predetermined delay operation period after resuming the compressor operation.
  • maintaining the cooling fan operation i.e. active cooling fan
  • maintaining the cooling fan operation at the increased conveyance rate for a predetermined delay operation period after resuming the compressor operation.
  • the cooling fan operation is changing (i.e. resuming) to a standard operation as it is used during normal drying operation.
  • the standard operation of the fan may provide that the fan is off or is on and blowing with a predetermined conveyance rate in dependency of the operation conditions (e.g. temperature of the refrigerant and/or compressor) during the standard drying operation.
  • the apparatus (particularly laundry dryer or washer-dryer) comprises a laundry storing compartment and a door covering an opening for loading/unloading the laundry storing compartment wherein the door is closed during a drying operation. If the door is opened the control operation is preferably as follows: The drying operation and the compressor operation are suspended, whereas the cooling fan is kept active at the same conveyance rate or its conveyance rate will be increased. However, if the cooling fan is not active at the time of suspending the drying operation and the compressor operation, the cooling fan will be activated.
  • the laundry storing compartment is configured as a rotatable drum driven by a drum motor and the cooling fan is driven by a fan motor that can be controlled independent of the operation of the drum motor, i.e. the fan motor is capable to be operated independently of the drum motor.
  • the cooling routine can be implemented independently from user actions during operation of the apparatus.
  • the compressor operation is maintained for a predetermined operation period when the drying operation is suspended. Thereby a potential suspension of compressor operation is delayed for a predetermined operation period after suspension of the drying operation.
  • a cooling fan operation is preferably maintained within the predetermined operation period (preferably with an increased fan speed). Extension by this predetermined operation period is beneficial for the heat-pump system efficiency because it is more efficient to avoid any change in the heat-pump system's operation mode (operating or suspending) when the drying operation is suspended only for a short time.
  • This "short time suspension” is made e.g. in case the user opens the door of the laundry storing compartment only short-time to add a laundry piece into the laundry storing compartment and a door safety switch suspends the drying operation.
  • Other possibilities to suspend the drying operation could be made by pressing an extra button and/or repressing a drying start button which results in a suspension (pause) of drying operation.
  • suspending drying operation means at least stopping rotation of the drum-like laundry storing compartment and/or stopping a process air blower.
  • the described cooling routine is applied to cool at least the refrigerant compressor of the heat-pump system in order to increase the probability of an immediate successful restart of the compressor upon a respective request (particularly receiving a restarting signal), even when there was only a short time period since compressor suspension.
  • This target can be supported e.g. by controlling and/or reducing temperatures of the compressor shell or casing during the drying cycle's and/or compressor's suspension mode.
  • cooling the compressor during the suspension mode contributes to a faster re-balancing of pressure differences within the heat-pump system, thus allowing a faster successful restart of the compressor after its suspension.
  • the at least one component of the heat-pump system to be cooled according to the cooling routine is an auxiliary heat exchanger or condenser adapted to cool the refrigerant at a location external to the process air channel.
  • the cooling fan is able to support appropriate refrigerant temperatures for an efficient drying air performance.
  • a laundry treatment apparatus is provided according to claim 11.
  • control unit of the laundry treatment apparatus is adapted to implement any of the method steps described above or in the following description individually or in any arbitrary combination. Additionally or alternatively the laundry treatment apparatus is further configured according the above or following elements and features individually or in any combination thereof.
  • a laundry treatment apparatus configured in this way and/or with a control unit implementing such method steps provides the advantages as described above and/or below.
  • the apparatus provides a more efficient or improved operation of the heat pump system.
  • Fig. 1 shows a schematically depicted laundry treatment apparatus 2 (denoted in brief "apparatus") which in this embodiment is a heat pump tumble dryer.
  • the tumble dryer 2 comprises a heat pump system 4, including a closed refrigerant loop 6 which comprises in the following order of refrigerant flow B: a first heat exchanger 10 acting as evaporator for evaporating the refrigerant and cooling process air, a compressor 14, a second heat exchanger 12 acting as condenser for cooling the refrigerant and heating the process air, and an expansion device 16 from where the refrigerant is returned to the first heat exchanger 10.
  • the heat pump system 4 forms the refrigerant loop 6 through which the refrigerant is circulated by the compressor 14 as indicated by arrow B.
  • the process air flow within the treatment apparatus 2 is guided through a compartment 18 of the home appliance 2 for receiving articles to be treated, e.g. a drum 18.
  • the articles to be treated are textiles, laundry 19, clothes, shoes or the like.
  • the process air flow is indicated by arrows A in Fig. 1 and is driven by a process air blower 8.
  • the process air channel 20 guides the process air flow A outside the drum 18 and includes different sections, including the section forming the battery channel 20a in which the first and second heat exchangers 10, 12 are arranged.
  • the process air exiting the second heat exchanger 12 flows into a rear channel 20b in which the process air blower 8 is arranged.
  • the air conveyed by blower 8 is guided upward in a rising channel 20c to the backside of the drum 18.
  • the air exiting the drum 18 through the drum outlet (which is the loading opening 21 of the drum and which is covered by a door 24) is filtered by a fluff filter 22 arranged close to the drum outlet in or at the channel 20.
  • the optional fluff filter 22 is arranged in a front channel 20d forming another section of channel 20 which is arranged behind and adjacent the front cover of the dryer 2.
  • the condensate formed at the first heat exchanger 10 is collected and guided to a condensate collector 30 which is connected to an extractable condensate drawer 40 via a drain pipe 46, a drain pump 36 and a drawer pipe 50.
  • the collected condensate can be pumped from the collector 30 to the drawer 40 which is arranged at an upper portion of the apparatus 2 from where it can be comfortably withdrawn and emptied by a user.
  • a control unit 51 is disposed in the cabinet of the apparatus 2 to control several components in order to achieve efficient cooling of the compressor 14.
  • the control unit 51 controls a cooling fan 54.
  • This cooling fan 54 is driven by a fan motor 56.
  • the cooling fan 54 blows cooling air C towards the compressor 14 for cooling.
  • the cooling fan 54 sucks cooling air over the compressor 14 and/or is capable to additionally cool other components of the heat-pump system 4, e.g. an auxiliary heat exchanger arranged outside of the process air channel 20 and/or electronic components of the apparatus 2.
  • the activated cooling fan 54 generates the cooling air flow C indicated in Fig. 2 for cooling the compressor 14 preferably according to cooling routines described below.
  • control unit 51 is adapted to control a compressor motor 59 which is driving the compressor 14.
  • the compressor 14 is operated or activated by the control unit 51 in response to predefined signals according to overall operation of the apparatus 2 and according to a restarting routine (for restarting the compressor) to be described in detail.
  • a restarting routine for restarting the compressor
  • the control unit 51 monitors the value of electric current I_comp supplied to the compressor 14. Monitoring this value is important during the restarting routine.
  • control unit 51 is at the same time the control unit for controlling and monitoring the overall operation of the apparatus 2.
  • the control unit 51 receives a temperature signal from a temperature sensor 41 which is for example arranged at the outlet of the second heat exchanger 12 (condenser) and which is indicative of the refrigerant temperature T_refrig at that position.
  • the cooling fan 54 is operated or activated by the control unit 51 in response to predefined signals according to overall operation of the apparatus 2 and according to the cooling routine to be described in detail.
  • the cooling fan 54 is activated, which means that cooling air C is blown towards or sucked from the compressor 14, the status of the cooling fan 54 is set to "ON”.
  • the cooling fan 54 is not active or deactivated, the status of the cooling fan 54 is "OFF".
  • a compressor temperature sensor 60 is arranged at the compressor 14 to detect the temperature T_comp of the compressor 14.
  • the control unit 51 compares the signals of this compressor temperature sensor 60 with a defined temperature threshold value to control the cooling operation of the heat-pump system 4.
  • the compressor temperature sensor 60 can be arranged in a suitable position at or in or on a casing of the compressor 14.
  • the control by the control unit 51 for restarting the compressor 14 according to a restarting routine or method will be explained by the flow diagram according to Fig. 3 .
  • the section of the operation of the dryer 2 shown in Fig. 3 is starting (step S1) under a status where the operation of the compressor 14 is suspended, i.e. the status of the compressor motor 59 is inactive and the compressor 14 is "OFF".
  • the term "suspension” includes e.g. a pause of the compressor operation during a running drying cycle or stopping the compressor operation at the end or after the end of a drying cycle.
  • the operation of the compressor 14 is restarted, i.e. its status will be switched to "ON" in step S2, as soon as a restarting signal is received by the control unit 51.
  • This restarting signal is preferably initiated by a user giving a start signal or ending a pause and/or by the control unit 51 itself.
  • the compressor operation is able to be restarted independent of any predetermined time delay after suspension of the compressor operation.
  • the value of electric current I_comp supplied to the compressor 14 is monitored by the control unit 51 (step S3) at least for a predetermined delay time period t_delay-t.
  • step S4 the monitored value of electric current I_comp is compared with a predetermined threshold value of current I_thresh (step S5). Depending on the result of this comparison the compressor operation is maintained (kept active) or suspended again. The restarted compressor operation is maintained, if the monitored value of current I_comp is lower than the predetermined threshold value of current I_thresh, i.e. the compressor 14 remains in the status "ON" (step S6).
  • step S5 If the monitored value of current I_comp is equal to or is higher than the predetermined threshold value of current I_thresh according to the comparison in step S5, the compressor operation is suspended again, i.e. the compressor 14 is switched into the status "OFF' (step S7). According to subsequent step S8, the compressor 14 remains in this status "OFF" during a predetermined time, i.e. during a set predetermined suspension time period t_susp (step S8). After expiry of this predetermined suspension time period t_susp the compressor operation is restarted automatically a second time, i.e. the compressor 14 is switched into the status "ON" (step S9). The latter status corresponds to the status according to step S2 and the restarting routine is transit to step S3 and subsequent steps. This means that the second-time restarted compressor operation again is generally maintained depending on the value of current I_comp of the compressor 14. In other words, the second-time restarted compressor operation is maintained and suspended according to the condition for the first time of restart of compressor operation.
  • this restarting routine it is possible to successfully restart the normal operation of the compressor 14 at any time after its suspension by a sequence of switching the status of the compressor 14 between "ON” and “OFF” - as long as the starting current I_comp is at or above the threshold I_thresh. If not successful the first time, the restarting routine repeats steps S7 till step S9 until the suspended compressor 14 is running again in its normal operation by remaining the status "ON” according to step S6 (the starting compressor current falls below I_thresh).
  • the predetermined delay time period t_delay-t and/or the predetermined suspension time period t_susp is/are preferably within the range of milliseconds lower than one second or within the range of some seconds. Particularly, the predetermined delay time period t_delay-t and the predetermined suspension time period t_susp are equal. For example, the delay time period t_delay-t and/or the suspension time period t_susp are predetermined as two seconds.
  • Figs. 4 to 6 represent embodiments of a cooling routine or method controlled by the control unit 51 for cooling the compressor 14. These embodiments may be implemented independent of the compressor restarting routine (exemplified in the embodiment of Fig. 3 ) or may be implemented in combination as further embodiment(s) of the compressor restarting routine while the compressor operation is suspended or when the suspension of the compressor cancelled.
  • the exemplary embodiment for a compressor cooling routine shown in Fig. 4 as a portion of the operation of the dryer 2 is starting (step S10) under a standard operation mode.
  • the status of the compressor 14 is "ON”, i.e. the compressor 14 is in operation.
  • the cooling fan 54 is in the standard operation mode "STANDARD”, i.e. the cooling fan 54 is either in the state “ON” with a predetermined conveyance rate or in the state "OFF” according to the standard operation mode.
  • step S20 it is verified, if a drying operation is suspended. If this is the case, the compressor 14 remains in operation until expiry of a predetermined operation period t_op (step S30).
  • This extension of the compressor operation as compared to the drying operation by step S30 provides the chance that a restart of the drying operation is initiated and suspension of the drying operation is cancelled without stopping the compressor at all. In this 'best' case the operation of the heat pump system is not or minimally affected (normally the process air blower is stopped which results in increase of condenser temperature (here at numeral 12) and decrease of evaporator temperature (here at numeral 10). No compressor 14 restart or waiting period processing with a temporal delay of the overall drying process is necessary here. It is to be noted that step S30 is optional and with suspension of the drying process the compressor operation may be suspended directly (S20 to S40).
  • step S40 after expiry of this time period t_op (YES) the compressor operation is suspended, i.e. the compressor 14 is in the state "OFF" (step S40).
  • the temperature threshold value T_thresh corresponds to a second temperature threshold value T_thresh-2 used during suspension of the compressor 14 (step S50).
  • This second temperature threshold value T_thresh-2 is lower than a first temperature threshold value T_thresh-1 used during operation of the compressor 14 and the heat-pump system 4 for operating the cooling fan 54 when the refrigerant temperature T_refrig is above the first temperature threshold value T_thresh-1.
  • step S70 If the detected refrigerant temperature T_refrig is equal to or lower than the defined temperature threshold value T_thresh (step S70) the temperature threshold T_thresh is changed (S80) and the operation of the cooling fan 54 is suspended, i.e. is changed to the state "OFF" (step S90).
  • step S90 the drying process suspension processing routine continues with other steps - compare e.g. Fig. 6 .
  • the compressor operation suspended and the fan operation stopped (OFF) the control unit 51 waits for a drying operation restart command (cancellation of suspension) and performs a compressor and drying process restart routine in dependency of the then existing conditions.
  • Fig. 6 gives an embodiment for restarting the compressor 14 as soon as (e.g. drying operation suspension is cancelled and thus) compressor suspension is cancelled.
  • step S100 An alternative routine to temporally extend or expand the cooling operation during the suspended compressor operation is provided by step S100 in Fig. 5 (instead of steps S50 and S80 in Fig. 4 ).
  • step S70 the detected refrigerant temperature T_refrig is compared with the standard temperature threshold value T_thresh (corresponding to T_thresh_1 in the routine according to Fig 4 ). If the detected refrigerant temperature T_refrig is higher than the temperature threshold value T_thresh, the cooling fan operation is maintained (according to step S60).
  • step S70 Even if the detected refrigerant temperature T_refrig is lower than or equal to the temperature threshold value T_thresh in step S70 the cooling fan operation is maintained for a predetermined operation period or predetermined time period t_pred by the delay implemented by step S100. After expiry of the predetermined operation period or predetermined time period t_pred (and after the detected refrigerant temperature T_refrig dropped below the threshold T_thresh), the operation of the cooling fan 54 is suspended, i.e. its operation mode is changed to the state "OFF' (step S90) as already described along the routine in Fig. 4 .
  • control routine according to the steps S50 - S90 or according to the steps S60 - S100 is implemented by substituting the refrigerant temperature T_refrig by the compressor temperature T_comp.
  • the flow diagram in Fig. 6 provides another section of the compressor cooling control routine.
  • the status of the compressor 14 is "OFF" (i.e. the compressor operation is suspended) according to step S120, it is verified, if this suspension is cancelled (step S130). If not cancelled, the compressor 14 remains suspended (step 120). If the suspension is cancelled (e.g. due to resuming drying operation), the operation of the compressor 14 is resumed and consequently the state of the compressor 14 is "ON" (step S140).
  • the routine of Fig. 6 can be implemented in combination with the routines of Figs. 4 and 5 and vice versa. E.g. and as mentioned above, this routine is implemented as (drying operation +) compressor operation restart routine after step S90 ( Figs. 4 and 5 ).
  • the routines or methods for compressor cooling shown in Figs. 4 to 6 may be combined with the compressor restart routine shown in Fig. 3 .
  • the continuation of compressor cooling according to the routine shown in Fig. 6 is the next step following to step S6 in Fig. 3 or the routine of Fig. 6 is initiated in parallel to execution of step S6.
  • Reference Numeral List 2 tumble dryer 60 compressor temperature sensor 4 heat pump system 6 refrigerant loop A process air flow 8 blower B refrigerant flow 10 first heat exchanger C cooling air flow 12 second heat exchanger I_comp monitored value of current 14 compressor I_thresh predetermined value of current 16 expansion device 18 drum r_convey conveyance rate 19 laundry stat_fan status of cooling fan 20 process air channel stat_comp status of compressor 20a battery channel S1 - S170 control steps 20b rear channel t_delay-op predetermined delay operation period 20c rising channel 20d front channel t_delay-t predetermined delay time period 21 loading opening 22 filter element t_op predetermined operation period 24 door 30 condensate collector t_pred predetermined time period 36 drain pump t_susp predetermined suspension time period 40 condensate container 41 refrigerant temperature sensor T_comp compressor temperature T_refrig refrigerant temperature 46 drain pipe T_thresh temperature threshold value 50 drawer pipe T_thresh-1 first temperature threshold value 51 control

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)

Claims (11)

  1. Procédé de mise en œuvre de compresseur (14) dans un appareil de traitement du linge, en particulier un sèche-linge (2) ou un lave-linge séchant, l'appareil de traitement du linge comprenant :
    un système de pompe à chaleur (4) comportant un compresseur (14) conçu pour faire circuler un réfrigérant au travers du système de pompe à chaleur (4) pendant une opération de séchage du linge, et
    une unité de commande (51) pilotant le fonctionnement de l'appareil de traitement du linge (2), le procédé comprenant :
    l'interruption du fonctionnement du compresseur (14),
    le redémarrage du fonctionnement du compresseur (14) à la réception d'un signal de redémarrage, le fonctionnement du compresseur étant redémarré indépendamment d'un quelconque délai prédéterminé après l'interruption du fonctionnement du compresseur, et
    la surveillance de la valeur (I_comp) de l'énergie ou du courant fourni au compresseur (14) après le redémarrage du fonctionnement du compresseur, et caractérisé par :
    en fonction de la valeur (I_comp) de l'énergie du courant :
    le maintien du fonctionnement du compresseur si la valeur (I_comp) surveillée de l'énergie du courant est inférieure à une valeur (I_tresh) prédéterminée, et
    l'interruption à nouveau du fonctionnement du compresseur si la valeur (I_comp) surveillée de l'énergie ou du courant est supérieure ou égale à la valeur (I_tresh) prédéterminée,
    dans lequel, dans le cas d'une nouvelle interruption du fonctionnement du compresseur, un intervalle de temps (t_susp) d'interruption est établi, et
    le fonctionnement du compresseur est redémarré un second temps après l'expiration de l'intervalle de temps (t_susp) d'interruption prédéterminé, et
    dans lequel le fonctionnement du compresseur redémarré après le second temps est maintenu et interrompu en fonction d'une condition concernant le premier temps de redémarrage du fonctionnement du compresseur.
  2. Procédé selon la revendication 1, dans lequel la valeur (I_comp) d'énergie de courant fourni au compresseur (14) après le redémarrage du fonctionnement du compresseur est surveillée pendant un intervalle de temps de retard (t_delay-t) prédéterminé ou bien est surveillée à un temps de retard prédéterminé après le redémarrage du fonctionnement du compresseur, avant la détermination de ce que le fonctionnement du compresseur est maintenu ou de nouveau interrompu.
  3. Procédé selon l'une quelconque des revendications précédentes, dans lequel la réception du signal de redémarrage est déclenchée par un ou plusieurs éléments parmi :
    un signal de démarrage donné par l'utilisateur ou bien la fin d'une pause, et
    l'unité de commande (51).
  4. Procédé selon la revendication 1, dans lequel le fonctionnement du compresseur redémarré après un second temps est maintenu en fonction de la valeur (I_comp) d'énergie ou de courant du compresseur (14).
  5. Procédé selon l'une quelconque des revendications précédentes, lorsqu'elles dépendent de la revendication 2, dans lequel l'intervalle de temps de retard (t_delay-t) prédéterminée ou le temps de retard prédéterminé et l'intervalle de temps (t_susp) d'interruption prédéterminé présentent des valeurs égales.
  6. Procédé selon l'une quelconque des revendications précédentes, dans lequel l'appareil de traitement du linge (2) comprend un ventilateur de refroidissement (54) utilisé pour refroidir le compresseur (14) en transportant de l'air de refroidissement (C) sur le compresseur (14).
  7. Procédé selon la revendication 6, dans lequel, dans le cas où le fonctionnement du compresseur est interrompu, le procédé comprend en outre :
    si le ventilateur de refroidissement (54) est actif au moment de l'interruption du fonctionnement du compresseur (14), le maintien du fonctionnement du ventilateur de refroidissement (54) avec le même débit de transport (r_convey) ou bien l'augmentation du débit de transport (r_convey) du ventilateur de refroidissement (54), et
    si le ventilateur de refroidissement (54) n'est pas actif au moment de l'interruption du fonctionnement du compresseur, l'activation du ventilateur de refroidissement (54) afin de transporter de l'air de refroidissement (C) vers le compresseur (14).
  8. Procédé selon la revendication 7, comprenant en outre : le maintien du fonctionnement du ventilateur de refroidissement pendant une période (t_pred) prédéterminée après l'interruption du fonctionnement du compresseur.
  9. Procédé selon la revendication 7 ou la revendication 8, dans lequel, après l'interruption du fonctionnement du compresseur, le procédé comprend en outre :
    le maintien du fonctionnement du ventilateur de refroidissement tant que la température (T_comp) du compresseur (14) est au-dessus d'une valeur seuil de température (T_tresh), ou
    le maintien du fonctionnement du ventilateur de refroidissement pendant une période de fonctionnement prédéterminée (T_pred) après que la température (T_comp) du compresseur (14) ait atteint ou soit en dessous d'une valeur seuil de température (T_tresh).
  10. Procédé selon la revendication 9, dans lequel la valeur seuil de température (T_tresh) est :
    une première valeur seuil de température (T_tresh-1) qui est utilisée pendant le fonctionnement du compresseur pour mettre en œuvre le ventilateur de refroidissement (54) lorsque la température (T_comp) du compresseur est au-dessus de la première valeur seuil de température (T_tresh-1), ou
    une seconde valeur seuil de température (T_tresh-2) qui est inférieure à la première valeur seuil de température (T_tresh-1) et qui est utilisée pendant l'interruption du fonctionnement du compresseur pour mettre en œuvre le ventilateur de refroidissement (54).
  11. Appareil de traitement du linge, en particulier sèche-linge (2) ou lave-linge séchant, l'appareil de traitement du linge comprenant :
    un système de pompe à chaleur (4) comportant un compresseur (14) conçu pour faire circuler un réfrigérant au travers du système de pompe à chaleur (4) pendant une opération de séchage du linge, et
    une unité de commande (51) pilotant le fonctionnement de l'appareil de traitement du linge (2), l'unité de commande (51) étant conçue pour piloter le fonctionnement du compresseur (14) conformément à l'une quelconque des revendications précédentes du procédé.
EP13181947.6A 2013-08-28 2013-08-28 Appareil de traitement de linge à pompe à chaleur et procédé de fonctionnement d'un compresseur Active EP2843118B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP13181947.6A EP2843118B1 (fr) 2013-08-28 2013-08-28 Appareil de traitement de linge à pompe à chaleur et procédé de fonctionnement d'un compresseur
PL13181947T PL2843118T3 (pl) 2013-08-28 2013-08-28 Aparat do obróbki prania z pompą ciepła i sposób działania sprężarki

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13181947.6A EP2843118B1 (fr) 2013-08-28 2013-08-28 Appareil de traitement de linge à pompe à chaleur et procédé de fonctionnement d'un compresseur

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EP2843118B1 true EP2843118B1 (fr) 2021-07-07

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EP3124678B1 (fr) * 2015-07-27 2018-06-20 Electrolux Appliances Aktiebolag Procédé de fonctionnement d'un appareil de lavage et/ou de séchage de pompe à chaleur et un tel appareil de lavage ou de séchage
CN106436227B (zh) * 2015-08-10 2020-06-16 博西华电器（江苏）有限公司 一种干衣机及其故障自检方法
EP3467187B1 (fr) 2017-10-09 2021-12-22 Whirlpool Corporation Filtre conçu pour être utilisé dans une machine à sécher le linge et machine à sécher le linge équipé d'un tel filtre
KR20210070568A (ko) * 2019-12-05 2021-06-15 삼성전자주식회사 의류 처리 장치 및 그의 제어 방법

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CN100436700C (zh) 2003-12-08 2008-11-26 松下电器产业株式会社 衣物干燥装置
JP3897037B2 (ja) * 2004-08-26 2007-03-22 松下電器産業株式会社 衣類乾燥装置
US8533975B2 (en) * 2010-10-29 2013-09-17 General Electric Company Apparatus and method for refrigeration cycle elevation by modification of cycle start condition
EP2527520B1 (fr) * 2011-05-26 2018-12-26 Electrolux Home Products Corporation N.V. Appareil de traitement d'articles doté d'un système de pompe à chaleur avec élément de sécurité
CA2752932C (fr) * 2011-09-22 2018-04-17 General Electric Company Appareil et methode de controle de cycle sec complet dans un sechoir a pompe a chaleur en diminuant l'indication de capacite en fonctionnant a la valeur moyenne de puissance du compresseur ou de pression ou de temperature de la pompe a chaleur
PL2764152T3 (pl) * 2011-10-04 2016-03-31 Arcelik As Suszarka do bielizny z pompą ciepła
EP2679718A1 (fr) * 2012-06-29 2014-01-01 Electrolux Home Products Corporation N.V. Machine de traitement du linge ou de la vaisselle

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