CN109629204B - Laundry treatment appliance and method for operating a laundry treatment appliance - Google Patents
Laundry treatment appliance and method for operating a laundry treatment appliance Download PDFInfo
- Publication number
- CN109629204B CN109629204B CN201811149598.5A CN201811149598A CN109629204B CN 109629204 B CN109629204 B CN 109629204B CN 201811149598 A CN201811149598 A CN 201811149598A CN 109629204 B CN109629204 B CN 109629204B
- Authority
- CN
- China
- Prior art keywords
- temperature
- process air
- heat pump
- laundry treatment
- detected
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
-
- 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
- D06F2103/02—Characteristics of laundry or load
- D06F2103/08—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
- D06F2103/32—Temperature
-
- 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
- D06F2103/34—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
- D06F2103/50—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
- D06F2103/58—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers related to condensation, e.g. condensate water level
-
- 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
- D06F2105/30—Blowers
-
- 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
- D06F58/32—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
Abstract
A laundry treatment appliance has a process air system which is open to the outside thereof, a heat pump which is thermally connected to the process air system, and an electronics unit for controlling the process air system and the heat pump. In order to provide such a laundry treatment appliance, by means of which the process air system can also achieve a condensation rate of at least 80% in a closed installation space in which the laundry treatment appliance is installed, the laundry treatment appliance has at least one temperature sensor connected to the electronic unit for detecting the outside temperature and at least one humidity sensor connected to the electronic unit for detecting the relative outside air humidity, the heat pump has at least one expansion valve which can be electrically controlled by means of the electronic unit and which is connected upstream of the evaporator of the heat pump with respect to the flow direction of the coolant circulating in the heat pump, and the electronic unit is provided for controlling the expansion valve so that the temperature of the evaporator lies below the dew point of the outside air taking account of the detected outside temperature and the detected relative outside air humidity.
Description
Technical Field
The invention relates to a laundry treatment appliance, in particular a laundry dryer or washer dryer, having at least one process air system which is open to the outside of the laundry treatment appliance, at least one heat pump which is thermally connected to the process air system, and at least one electronic unit for controlling the process air system and the heat pump, by means of which process air system process air can be conducted during a drying process for drying laundry located in the process air system.
The invention further relates to a method for operating a laundry treatment appliance having at least one process air system which is open to the outside and at least one heat pump which is thermally connected to the process air system, by means of which process air can be conducted during a drying process for drying laundry located in the process air system.
Background
The laundry dryer has a process air system which is open to the outside of the laundry treatment appliance and by means of which process air can be conducted during a drying process for drying laundry in the process air system, which is also referred to as an exhaust air dryer. One section of the process air system is formed by a container in which a washing drum containing the laundry to be dried is rotatably arranged. The process air system usually has a process air blower, by means of which ambient air or room air is drawn into the process air system from the outside of the laundry dryer during the drying process and is conducted through the process air system while absorbing moisture, and by means of which the moisture-laden process air thus produced is discharged into the outside of the laundry dryer. Usually, the process air system has an additional electrical heating unit, by means of which the process air fed into the container can be heated.
It is known to provide a corresponding exhaust air dryer with a heat pump which is thermally coupled to the process air system, by means of which heat recovery can be effected, wherein the recovered heat is used to heat the process air. In this case, the process air carries away heat by means of an evaporator of the heat pump, and the heat absorbed by the evaporator is at least partially conveyed back to the process air by a liquefier of the heat pump, wherein the evaporator and the liquefier form a section of a coolant circuit of the heat pump. Such exhaust air dryers are known from DE 19731826 a 1. Laundry dryers with a heat recovery system without the use of a heat pump are known from DE 19737075 a1 and DE 3000865 a 1. Laundry dryers with a closed process air circulation circuit and a heat recovery system are known from US-Patent 7,055,262 and US 2013/0008049 a 1.
In exhaust air dryers, the process air leaves the process air system with a relative air humidity of approximately 100%, in particular when it is previously cooled by a heat reducer, for example an evaporator of a heat pump, with separation of condensed moisture. When the moist process air enters the installation space of the building in which the exhaust-gas dryer is installed, this can lead to an undesirable increase in the moist air in the installation space, since the moist air finally also enters the exhaust-gas dryer again, resulting in a low condensation rate of significantly less than 80%. It is therefore generally not necessary to discharge the process air from the exhaust-gas dryer directly into the installation space, (wherein it is also conceivable that fluff may also be contained in the process air) but instead to discharge it out of the installation space and the building via the respective exhaust-gas hose or vertical exhaust-gas duct. In contrast, however, the advantage is that the exhaust-gas dryer has a better energy balance than a laundry dryer with a closed process air circuit.
Disclosure of Invention
The object of the present invention is to provide a laundry treatment appliance of the type mentioned at the outset, by means of which a process air system can achieve a condensation rate of at least 80% also in a closed installation space in which the laundry treatment appliance is installed.
This task is solved by the subject matter of the invention. Advantageous embodiments are given in the following description and the drawings, wherein the embodiments are capable of realizing further improved, particularly also preferred or advantageous aspects of the invention, either individually or in combinations in which at least two of the embodiments differ from one another. In this case, the configuration of the laundry treatment appliance can also correspond to the design of the method or vice versa, even if this is not explicitly indicated in the individual case below.
Therefore, the washing treatment device according to the present invention comprises: at least one process air system which is open to the outside of the laundry treatment appliance and by means of which process air can be conducted during a drying process for drying laundry located in the process air system; at least one heat pump thermally coupled to the process air system; at least one electronic unit for controlling the process air system and the heat pump; at least one temperature sensor connected to the electronic unit for detecting an ambient temperature and at least one humidity sensor connected to the electronic unit for detecting a relative ambient air humidity. The heat pump has at least one expansion valve which can be electrically controlled by means of an electronic unit and which is connected upstream of the evaporator of the heat pump with respect to the flow direction of the coolant circulating in the heat pump. The electronic unit is provided for controlling the expansion valve in such a way that the temperature of the evaporator is below the dew point of the ambient air, taking into account the detected ambient temperature and the detected relative ambient air humidity.
The condensation rate of an exhaust gas dryer for heat recovery with a heat pump, in particular a compressor heat pump, arranged on the process air system can be at most 55% in relation to the pump factor of the heat pump. However, if the exhaust air dryer is to be operated in a closed installation space, technical measures for ensuring a required condensation rate of at least 80% are required. This is achieved according to the invention in that the temperature of the evaporator is brought below the dew point of the ambient air by taking into account the ambient temperature and the relative ambient air humidity in the environment of the laundry treatment appliance when controlling the electric expansion valve of the heat pump.
The air leaving the process air system or the laundry treatment appliance therefore has a lower absolute water content than the sucked-in ambient air. By controlling the electric expansion valve according to the invention, a very high condensation rate can thus be achieved, which can even exceed 100%, since the outside air is additionally dehumidified. If the software is implemented in the appliance electronics of the laundry treatment appliance, the laundry treatment appliance can thus also be used as an indoor air dehumidifier. The high condensation rate, which can be achieved by the laundry treatment appliance according to the invention, also in the closed installation space, enables very efficient and rapid drying of the laundry.
The temperature of the coolant flowing to the evaporator, which is circulated in the coolant circulation system of the heat pump, can be adjusted by controlling the electric expansion valve. The temperature of the evaporator can thereby be adjusted or varied.
The process air system is formed in part by a container in which a washing drum, which receives the laundry to be dried, is rotatably supported or is the washing drum. The laundry treatment appliance can additionally have at least one electrical heating unit, which is arranged on the process air system and can be controlled by an electronic unit, and by means of which the process air fed into the container can be heated. The process air system has at least one process air blower, by means of which ambient air can be drawn into the process air system and process air can be discharged from the process air system. At least one temperature sensor connected to the electronic unit can be arranged on the process air system, by means of which temperature sensor the temperature of the process air to be fed into the container can be detected. An electronic unit may be provided for controlling and/or regulating the process air system, the additional heating unit and/or the heat pump taking into account the signal of the temperature sensor.
The heat pump has a coolant circulation system in which coolant circulates, and the coolant circulation system has an evaporator, a compressor, a liquefier, and an electrically controllable expansion valve. The evaporator removes heat from the process air output by the container, so that moisture contained in the process air can condense out of the process air and be collected. The collected condensate can be removed or used, for example, by a washing system of the laundry treatment appliance, by means of which at least one heat exchanger (evaporator, liquefier) of the heat pump can be automatically washed, so that maintenance work can be reduced and heat recovery efficiency can be maintained. The evaporator transfers the absorbed heat to a coolant, which transfers the absorbed heat to and releases it at a liquefier. The liquefier releases the absorbed heat into the process air to be conveyed into the vessel, thereby heating the process air. The supply of electrical energy to an electrical heating unit arranged on the process air system can thereby be reduced.
The electronic unit can be implemented by software implemented into the existing appliance electronics of the laundry treatment appliance or be designed as a separate unit for this purpose. The electronic unit may have a program control system in order to be able to control the process air system and the heat pump according to a predefined program. Furthermore, the electronic unit can be provided for controlling and/or regulating the process air system and/or the heat pump as a function of one or more detected current operating parameters of the laundry treatment appliance. The electronic unit is provided for controlling the expansion valve in such a way that the temperature of the evaporator is below the dew point of the ambient air, taking into account the detected ambient temperature and the detected relative ambient air humidity. For this purpose, the electronics unit can, for example, call up a combined characteristic or characteristic curve which contains the dependency of the temperature of the evaporator on the ambient temperature and the relative ambient air humidity.
A temperature sensor for detecting the ambient temperature is arranged inside or outside the appliance housing of the laundry treatment appliance and beside the process air system. A humidity sensor for detecting the relative humidity of the outside air is arranged inside or outside the appliance housing of the laundry treatment appliance and beside the process air system.
The laundry treatment appliance can be designed as a laundry dryer, a washer dryer or a cabinet dryer.
According to a preferred embodiment, the laundry treatment appliance has at least one temperature or pressure sensor connected to the electronics unit and arranged on the coolant circuit of the heat pump, the electronics unit being provided to determine the temperature of the evaporator from a sensor signal of the temperature or pressure sensor. The temperature sensor can be arranged in or on the coolant circuit, in particular in the region of or on the evaporator. A pressure sensor may be arranged in the coolant circulation system and detect the pressure inside the coolant to be delivered to or from the evaporator. The electronic unit can be provided to determine the current temperature of the evaporator from the measurement signal of the temperature sensor or the pressure sensor. For this purpose, the electronic unit can, for example, recall a characteristic curve which contains the dependency of the temperature of the evaporator on the temperature measured by means of a temperature sensor or on the coolant pressure measured by means of a pressure sensor. Alternatively, an algorithm implemented in a computing unit of the electronic unit may be used for determining the temperature of the evaporator.
According to a further advantageous embodiment, the electronic unit is provided for determining the absolute amount of water in the ambient air from the detected ambient temperature and the detected relative ambient air humidity and for controlling the expansion valve taking into account the determined absolute amount of water in the ambient air. The electronic unit, knowing the absolute amount of water in the ambient air, can determine the dew point of the ambient air and accordingly control the electrically controllable expansion valve in order to be able to keep the temperature of the evaporator below the dew point during the drying process.
In a further preferred embodiment, the process air system has at least one blower which can be electrically controlled by means of an electronic unit, wherein the electronic unit is provided for controlling the blower taking into account the detected outside temperature and the detected relative outside air humidity. If, for example, the evaporator is kept at a higher temperature below the dew point of the ambient air by means of the electronics unit, the blower can be controlled in such a way that the process air flow generated thereby is greater than in the case of the temperature of the evaporator being kept at a lower temperature below the dew point of the ambient air by means of the electronics unit.
In a method according to the invention for operating a laundry treatment appliance having at least one process air system which is open to the environment and at least one heat pump which is thermally connected to the process air system, by means of which process air can be conducted during a drying process for drying laundry located in the process air system, the environment temperature and the relative environment air humidity are detected, wherein an electrically controllable expansion valve of the heat pump is controlled in such a way that the temperature of the evaporator lies below the dew point of the environment air, taking into account the detected environment temperature and the detected relative environment air humidity, said expansion valve being connected upstream of the evaporator of the heat pump with respect to the flow direction of a coolant which circulates in the heat pump.
The method is accordingly associated with the advantages mentioned above in connection with the laundry treatment appliance. In particular, a laundry treatment appliance according to any of the preceding configurations or any combination of at least two of said configurations with one another can be used for carrying out the method.
According to one advantageous embodiment, the temperature of the evaporator is determined and taken into account in the control of the expansion valve. This embodiment is associated with the advantages mentioned above with regard to the corresponding configuration of the laundry treatment appliance. For this purpose, the laundry treatment appliance can in particular have at least one temperature sensor or pressure sensor connected to the electronics unit, which is arranged on the coolant circuit of the heat pump, wherein the electronics unit can be provided for determining the temperature of the evaporator from a sensor signal of the temperature sensor or pressure sensor.
A further advantageous embodiment provides that an absolute quantity of water in the ambient air is determined from the detected ambient temperature and the detected relative ambient air humidity, and the expansion valve is controlled taking into account the determined absolute quantity of water in the ambient air. This embodiment is associated with the advantages mentioned above with regard to the corresponding configuration of the laundry treatment appliance.
According to a further advantageous embodiment, the air flow of the process air through the process air system during the drying process is regulated taking into account the detected ambient temperature and the detected relative ambient air humidity. This embodiment is associated with the advantages mentioned above with regard to the corresponding configuration of the laundry treatment appliance. For this purpose, the process air system may in particular have at least one blower which can be electrically controlled by means of an electronic unit, wherein the electronic unit may be provided for controlling the blower taking into account the detected outside temperature and the detected relative outside air humidity.
The invention is not limited to the given combination of features of the independent and dependent patent claims. Further possibilities of combining the individual features with one another, in particular when derived from the claims, the following description of an embodiment or directly from the drawings, are also realized. Furthermore, the reference of the claims to the drawings by using reference signs shall in no way limit the scope of the claims to the embodiments shown.
Drawings
The invention is exemplarily described below according to a preferred embodiment with reference to the drawings of the accompanying drawings. In the drawings:
fig. 1 shows a schematic view of an embodiment of a laundry treatment appliance.
Detailed Description
Fig. 1 shows a schematic view of an exemplary embodiment of a laundry treatment appliance 1. The laundry treatment appliance 1 can be designed as a laundry dryer or as a washer dryer.
The laundry treatment appliance 1 has a process air system 2 which is open to the environment of the laundry treatment appliance 1 and by means of which process air can be conducted in accordance with the illustrated arrow 7 during a drying process for drying laundry in the process air system 2. For this purpose, the process air system 2 has a blower 3, by means of which ambient air can be drawn into the process air system 2 and process air can be blown out of the process air system 2. The process air system 2 also has an inlet section 4, into which the inlet section 4 opens, and a container 5, in which a washing drum, not shown, is rotatably arranged, and an outlet section 6, by means of which process air can be discharged from the container 5. The blower 3 is arranged on the input section 4. Furthermore, an electrical heating unit 8 is arranged on the inlet section 4, by means of which process air to be conveyed to the containers 5 can be heated.
Furthermore, the laundry treatment appliance 1 has a heat pump 9 which is thermally connected to the process air system 2. The heat pump 9 has a liquefier 10 arranged on the inlet section 4, a compressor 11, an evaporator 12 arranged on the outlet section 6, and an electrically controllable expansion valve 13, which is connected upstream of the evaporator 13 with respect to a flow direction, not shown, of a coolant circulating in the heat pump 9, not shown.
Furthermore, the laundry treatment appliance 1 comprises an electronic unit 14 for controlling the process air system 2 or the blower 3 and the heat pump 9 or the compressor 11 and the electric expansion valve 13. The electronics unit 14 is connected to the blower 3, the electrical heating unit 8, the compressor 11 and the expansion valve 13 in a signal-technical manner.
Furthermore, the laundry treatment appliance 1 has a first temperature sensor 15, which is connected to the electronic unit 14 in a signal-technical manner, for detecting the ambient temperature. Furthermore, the laundry treatment appliance 1 has a humidity sensor 16 connected to the electronic unit 14 for detecting the relative humidity of the outside air.
The electronics unit 14 is provided for controlling the expansion valve 13 in such a way that the temperature of the evaporator 12 lies below the dew point of the ambient air, taking into account the detected ambient temperature and the detected relative ambient air humidity. For this purpose, the electronics unit 13 can be provided for determining the absolute amount of water in the ambient air from the detected ambient temperature and the detected relative ambient air humidity and for controlling the expansion valve 13 taking into account the determined absolute amount of water in the ambient air. Furthermore, the electronic unit 14 can be provided for controlling the blower 3 taking into account the detected outside temperature and the detected relative outside air humidity.
The laundry treatment appliance 1 also has a second temperature sensor 17 or a pressure sensor (not shown) which is connected to the electronics unit 14 and is arranged on the coolant circuit 18 of the heat pump 9, wherein the electronics unit 14 is provided for determining the temperature of the evaporator 12 from a sensor signal of the second temperature sensor 17 or the pressure sensor.
List of reference numerals
1 washing treatment device
2-process air system
3 blower
4 input section
5 Container
6 output section
7 arrow (Process air flow)
8 heating unit
9 Heat pump
10 liquefier
11 compressor
12 evaporator
13 expansion valve
14 electronic unit
15 first temperature sensor (outside air temperature)
16 humidity sensor
17 second temperature sensor (evaporator temperature)
18 coolant circulation system.
Claims (11)
1. A laundry treatment appliance (1) having
At least one process air system (2) which is open to the environment of the laundry treatment appliance (1) and by means of which process air can be conducted during a drying process for drying laundry in the process air system (2),
-at least one heat pump (9) thermally connected to the process air system (2), and
-at least one electronic unit (14) for controlling the process air system (2) and the heat pump (9),
it is characterized in that the preparation method is characterized in that,
-providing at least one first temperature sensor (15) connected to the electronic unit (14) for detecting the outside temperature and
-at least one humidity sensor (16) connected to the electronic unit (14) for detecting the relative outside air humidity,
-wherein the heat pump (9) has at least one expansion valve (13) that can be electrically controlled by means of the electronic unit (14), which expansion valve is connected upstream of an evaporator (12) of the heat pump (9) with respect to the flow direction of the coolant circulating in the heat pump (9),
-wherein the electronic unit (14) is arranged for controlling the expansion valve (13) taking into account the detected outside temperature and the detected relative outside air humidity such that the temperature of the evaporator (12) is below the dew point of the outside air.
2. Laundry treatment appliance (1) according to claim 1, characterized by at least one second temperature sensor (17) or pressure sensor connected to the electronics unit (14) and arranged on the coolant circulation system (18) of the heat pump (9), wherein the electronics unit (14) is provided for determining the temperature of the evaporator (12) from a sensor signal of the second temperature sensor (17) or pressure sensor.
3. Laundry treatment appliance (1) according to claim 1 or 2, characterized in that the electronic unit (14) is provided for deriving the absolute amount of water in the outside air from the detected outside temperature and the detected relative outside air humidity and for controlling the expansion valve (13) taking into account the already derived absolute amount of water in the outside air.
4. Laundry treatment appliance (1) according to claim 1 or 2, characterized in that the process air system (2) has at least one blower (3) which can be electrically controlled by means of the electronic unit (14), wherein the electronic unit (14) is provided for controlling the blower (3) taking into account the detected outside temperature and the detected relative outside air humidity.
5. Laundry treatment appliance (1) according to claim 3, characterized in that the process air system (2) has at least one blower (3) which can be electrically controlled by means of the electronic unit (14), wherein the electronic unit (14) is provided for controlling the blower (3) taking into account the detected outside temperature and the detected relative outside air humidity.
6. Laundry treatment appliance (1) according to claim 1 or 2, characterized in that it is a laundry dryer or a washer-dryer.
7. A method for operating a laundry treatment appliance (1) having at least one process air system (2) which is open to the outside and at least one heat pump (9) which is thermally connected to the process air system (2), by means of which process air can be conducted during a drying process for drying laundry in the process air system (2), characterized in that the outside temperature and the relative outside air humidity are detected and an electrically controllable expansion valve (13) of the heat pump (9) is controlled taking into account the detected outside temperature and the detected relative outside air humidity, so that the temperature of the evaporator (12) is below the dew point of the ambient air, said expansion valve being connected upstream of the evaporator (12) of the heat pump (9) with respect to the flow direction of the coolant circulating in the heat pump (9).
8. Method according to claim 7, characterized in that the temperature of the evaporator (12) is found and taken into account when controlling the expansion valve (13).
9. Method according to claim 7 or 8, characterized in that the absolute amount of water in the ambient air is determined from the detected ambient temperature and the detected relative ambient air humidity, and the expansion valve (13) is controlled taking into account the determined absolute amount of water in the ambient air.
10. Method according to claim 7 or 8, characterized in that the air flow of the process air through the process air system (2) during the drying process is adjusted taking into account the detected outside temperature and the detected relative outside air humidity.
11. Method according to claim 9, characterized in that the air flow of the process air through the process air system (2) during the drying process is adjusted taking into account the detected outside temperature and the detected relative outside air humidity.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102017217767.5 | 2017-10-06 | ||
| DE102017217767.5A DE102017217767A1 (en) | 2017-10-06 | 2017-10-06 | Laundry treatment apparatus and method for operating a laundry treatment appliance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109629204A CN109629204A (en) | 2019-04-16 |
| CN109629204B true CN109629204B (en) | 2022-05-24 |
Family
ID=65817324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811149598.5A Active CN109629204B (en) | 2017-10-06 | 2018-09-29 | Laundry treatment appliance and method for operating a laundry treatment appliance |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109629204B (en) |
| DE (1) | DE102017217767A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102019207225A1 (en) * | 2019-05-17 | 2020-11-19 | BSH Hausgeräte GmbH | Apparatus for drying laundry and a method for operating a heat pump of such an apparatus |
| CN112430976B (en) * | 2019-08-09 | 2024-01-30 | 上海海尔洗涤电器有限公司 | Clothes treatment equipment and control method thereof |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3000865A1 (en) | 1980-01-11 | 1981-07-16 | Fichtel & Sachs Ag, 8720 Schweinfurt | Clothes dryer - has heat exchanger before heater to increase efficiency |
| DE19725536C2 (en) * | 1997-06-17 | 2000-06-15 | Miele & Cie | Process for controlling the heating power of a clothes dryer |
| DE19731826A1 (en) | 1997-07-24 | 1998-02-12 | Joachim Rieder | Laundry dryer for sensitive fabrics |
| DE19737075A1 (en) | 1997-08-26 | 1998-03-19 | Joachim Rieder | Laundry dryer |
| CA2540368C (en) | 2003-09-29 | 2012-12-11 | Self Propelled Research And Development Specialists, Llc | Heat pump clothes dryer |
| KR101224053B1 (en) * | 2010-09-30 | 2013-01-21 | 엘지전자 주식회사 | Clothes treating apparatus with a heat pump system and operating method thereof |
| US9834882B2 (en) | 2011-07-07 | 2017-12-05 | Haier Us Appliance Solutions, Inc. | Device and method for heat pump based clothes dryer |
| DE102012212159A1 (en) * | 2012-07-11 | 2014-01-16 | BSH Bosch und Siemens Hausgeräte GmbH | Front loading exhaust air laundry drying apparatus e.g. exhaust air washer-dryer, has recovery aggregate for transferring heat from channel to passage and designed as heat pump that comprises vaporizer, condenser, compressor and valve |
| CN103245151B (en) * | 2013-04-28 | 2015-02-25 | 南京师范大学 | Frost-less air-source heat pump hot water unit and proportional-integral-differential control method for same |
| DE102013222929A1 (en) * | 2013-11-11 | 2015-05-13 | BSH Bosch und Siemens Hausgeräte GmbH | Method for operating a dryer with a heat pump and dryer suitable for this purpose |
| CN104790191B (en) * | 2015-04-20 | 2017-05-10 | 广东美的制冷设备有限公司 | Method and device for controlling dehumidifier and dehumidifier |
-
2017
- 2017-10-06 DE DE102017217767.5A patent/DE102017217767A1/en active Pending
-
2018
- 2018-09-29 CN CN201811149598.5A patent/CN109629204B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109629204A (en) | 2019-04-16 |
| DE102017217767A1 (en) | 2019-04-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20110005097A1 (en) | Clothes treating apparatus and controlling method thereof | |
| US20100154248A1 (en) | Dryer with heat pump and recirculation component and also method for its operation | |
| JP4858321B2 (en) | Clothes dryer | |
| CN101627156B (en) | Ductless dryer | |
| CN110597332B (en) | Baking room dry and wet ball temperature control method and baking room dry and wet ball temperature control system | |
| EP2460928A1 (en) | Method of operating a heat pump dryer and heat pump dryer | |
| US20100263226A1 (en) | Washing/drying device comprising a moisture determining device and method for operating a washing/drying device | |
| US9146056B2 (en) | Laundry treating apparatus having expansion valve which is variable according to the driving mode | |
| EP2599912A1 (en) | Heat pump laundry drying appliance | |
| EP2460927B1 (en) | Method of operating a heat pump dryer and heat pump dryer | |
| CN102016161A (en) | Household appliance, particularly for drying a laundry article | |
| CN107489008B (en) | Method for operating a condensation dryer and condensation dryer | |
| CN109629204B (en) | Laundry treatment appliance and method for operating a laundry treatment appliance | |
| EP2460926A1 (en) | Heat pump dryer | |
| JP2008188147A (en) | Washing and drying system | |
| US20090211107A1 (en) | Dryer with cooled motor | |
| CN106245295A (en) | The control method of dryer | |
| KR20110029579A (en) | Drying machine of use heat pump and method of controlling the same | |
| CN110093759B (en) | Appliance for drying laundry and method for operating a heat pump of such an appliance | |
| EP3256635B1 (en) | Clothes dryer and method for operating a clothes dryer | |
| KR20110043084A (en) | Drying machine of use heat pump and method of controlling the same | |
| KR101317621B1 (en) | Washing and drying machine | |
| KR100577248B1 (en) | Drying Machine and Method for Controlling Drying Process of Drying Machine | |
| WO2013182403A1 (en) | Laundry dryer with air-cooled condenser | |
| CN102227530A (en) | Laundry dryer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |