TR201613670A2 - - Google Patents

Abstract

The present invention includes a body (2), a drum (3) in which the laundry to be dried is placed, an air duct (4) in which the process air is circulated, a fan (5) that circulates the process air in the air channel (4), the drum (3) and the fan. (5) a compressor (7) that performs a motor (6) and refrigerant cycle running together, a thermal protector (8) that protects the compressor (7) against high temperature and electrical currents, an evaporator (9) that provides dehumidification of the process air, and It relates to a heat pump laundry dryer (1) comprising a heat pump system (12) with a condenser (10) that provides heating of the dehumidified process air and its control method.

Description

DESCRIPTION This invention relates to a tumble dryer with a heat pump and a control method. pump system, the refrigerant (refrigerant) that provides its circulation by gaining pressure. The drying process consists of a compressor and an evaporator and a condenser. It is made by passing process air over the laundry. process air, As it passes through the condenser, it gets hot and warms up on the laundry. and after dehumidification of the laundry, it is sent over the evaporator. The motor driving the drum also rotates the process air fan.

In order to dry the laundry homogeneously in the drying cycle, it is necessary to use the drum. The driving motor is stopped at predetermined periods and in the opposite direction. is started, then it is stopped and operated in the straight direction again.

When the engine is stopped and reversed, the process air fan is also is stopped and reversed and the process air flow is cut off.

Compressor temperature is excessive during the time when the air flow stops. increasing. Compressor, thermal protector against high currents and temperature (thermal), but at the said stop and reverse rotation times The rapid increase in temperature causes the thermal protector to open circuit the compressor. causes the feeding current to be interrupted, the drying cycle has not yet terminated before completion.

W number in the state of the art international patent application, preventing the compressor from overheating and drying time It relates to a shortened heat pump dryer.

The aim of this invention is to use a heat pump unit, which prevents the compressor from overheating. is the realization of the laundry dryer and control method.

To achieve the aim of this invention, the heat pump laundry dryer and In the control method, the motor driving the drum moves in a predetermined straight direction. It is operated according to the turn/stop/reverse direction algorithm. drum The driving motor also rotates the process air fan. Meet In the application in question, the environment is detected by the temperature sensors placed inside the body. temperature is detected and the control unit sends the data it receives from the temperature sensors. calculates an average ambient temperature value according to Control unit, set the average outdoor temperature to a preset limit environment compares with the temperature. Calculated ambient temperature is higher than the limit value rotation times of the motor driving the drum and the process air fan in the straight direction. are lengthened, the stop and reverse turn times are shortened. Thus, the process By increasing the times during which the air flow is carried out effectively, the air flow downtimes are reduced. of the heat pump system and especially the compressor. The current of the thermal protector feeding the compressor by preventing overheating cutting and ending the drying process before it is completed is avoided.

To achieve the aim of this invention, the heat pump laundry dryer and control method is shown in the attached figures and from these figures; Figure 1 - A schematic view of a heat pump washer dryer.

Figure 2 - The motor rotational movement of the inventive heat pump tumble dryer It is a graph showing the change over time.

Figure 3 - Control applied in the inventive heat pump tumble dryer is the flow diagram of the method.

The parts in the figures are numbered one by one and the corresponding numbers are given below. laundry dryer drum air duct Compressor thermal protector 99°$9`$^P~WNf^ evaporator . condenser . expansion element . heat pump system . temperature sensor . Control unit T-ambient: Measures ambient temperature A: The rotation times of the motor in the straight direction B: Stop times of the motor C: Reverse rotation times of the motor cw: Clockwise rotation ccw: counterclockwise rotation Washer dryer (1), a body (2), in which the laundry to be dried is placed a drum (3) is an air chamber in which process air (drying air) is circulated. duct (4), a process air fan (5) that circulates the process air in the air duct (4) (hereinafter referred to as the “fan (5)”) is a drive that drives the drum (3) and the fan (5) together. a compressor that performs the engine (6) and the refrigerant cycle (7) is a thermal device that protects the compressor (7) against high temperatures and electrical currents. protective (8) (also called “thermal”), moisture of the process air An evaporator (9), which provides the removal of moisture, heats the dehumidified process air. a condenser (10) that provides the expansion of the refrigerant leaving the condenser (10). an expansion element (11), for example a capillary tube or refrigerant pressurized by an expansion valve and compressor (7), passing through the condenser (10), the expansion element (1 1) and the evaporator (9) to the compressor. (7) a heat pump system (12) with refrigerant flow piping providing the return contains.

The subject of the invention is the laundry dryer (1), which is placed inside the body (2) and directly or indirectly the ambient air (the environment in which the washer dryer (1) operates) air) at least one temperature (T-ambient: T-ambient) sensor (13), drying cycle according to the data it receives from the temperature sensors (13). the rotation algorithm (profile) of the motor (6) and thus the fan (5) throughout determiner: - straight direction rotation times (A) (predetermined and drying cycle clockwise (CW) applied most of the time and considered “straight” or counterclockwise (ccw) rotation times (durations), - downtimes (B) and - rotation times (C) in the opposite direction with respect to the straight direction of rotation It includes a control unit (14) that allows the

The ambient temperature (T-) measured by the control unit (14), temperature sensors (13) environment) from a predetermined and memorized limit ambient temperature. If (T-limit) is high (T-ambient > T-limit), the motor (6) and fan (5) are in straight direction. the prolongation of the rotation times (A), the stopping times of the motor (6) and the fan (5) (B) shortening and the reverse rotation times of the motor (6) and the fan (5) (C). allows for shortening. In addition, it is particularly affected by the ambient temperature. Control unit (14), environment When the temperature rises above a certain limit value, the compressor (7) is extremely hot. Reverse rotation times of the motor (6) and the fan (5), which cause it to heat up. It reduces (B) and downtimes (C) so that there is no process air flow. or the periods when there is not enough amount are reduced. In contrast, the engine (6) and The rotation times of the fan (5) in the straight direction are increased, therefore, an effective process air The periods in which the flow takes place are also increased. Process air flow by increasing the ratio of the periods in which it takes place to the total duration of the drying cycle. the total duration of the drying cycle of the periods during which the process air flow stops. rate is reduced. Thus, the compressor (7) is at the head and the refrigerant The heat pump system consisting of flow pipes, condenser (10) and evaporator (9) (12) excessive increase in temperature and open circuit of the thermal protector (8) As a result, cutting the current feeding the compressor (7) and the drying process have not yet been completed. It is prevented from being terminated before it is completed.

In one embodiment of the invention, the control unit (14) is installed in the tumble dryer (1) At the beginning of the applied drying process, that is, the laundry dryer (1) When switched on, the ambient temperatures (T-) measured by the temperature sensors (13) environment). The heat pump system at the start of the drying process (12) has just been activated, so the refrigerant temperature has not increased, and therefore, since the heat pump system (12) has not heated up yet, the outer part inside the body (2) Almost equal temperatures to the ambient air are measured. temperature sensors (13) measurements are used as direct temperature data.

In another embodiment of the invention, temperature sensors are used at the beginning of the drying process. (13) for a period predetermined by the manufacturer and in advance a determined number of temperature measurements are made and the control unit (14) by taking the arithmetic average of the ambient temperatures (T-ambient) with the limit temperature (T- limit) compares.

In another embodiment of the invention, the laundry dryer (1) is inserted into the air duct (4). includes at least one temperature sensor (13) placed.

In another embodiment of the invention, the tumble dryer (l) is placed around the compressor (7). includes at least one temperature sensor (13) placed.

The subject of the invention is applied by the control unit (14) in the tumble dryer (1). The control method includes the following steps: - predetermined by the temperature sensors (13) at the beginning of the drying process taking a predetermined number of temperature measurements over a period of time (one hundred); - the arithmetic mean of all temperature data by the control unit (14) calculating a single ambient temperature (T-ambient) by taking 101; - with the limit ambient temperature (T-limit) of the calculated ambient temperature (T-ambient) (T-oitam > T-limit ?) (102); - the calculated ambient temperature (T-ambient) is higher than the limit ambient temperature (T-limit) on the other hand, extending the rotation times (A) of the motor (6) in the straight direction and stopping times (B) shortening the reverse rotation times (C) with (103); - the calculated ambient temperature (T-ambient) is lower than the limit ambient temperature (T-limit) motor (6) rotation times in straight direction (A), stopping times (B) and in reverse direction. engine at predetermined normal conditions without changing the rotation times (C). (6) implementation of the rotation algorithm (profile) (104).

In the application subject to the invention, the ambient temperature (T- environment) is measured by the temperature sensors (13) located inside the body (2).

The control unit (14) evaluates the data it receives from the temperature sensors (13). the motor (6) and thus the process air fan (5) during the drying cycle the straight direction rotation times (A), stop times (B) and changes the rotation times (C) in the opposite direction. Thus, the heat pump system (12) overheating due to ambient temperature and compressor (7) The thermal protector (8) that protects against high heat and currents as an open circuit. It is prevented from terminating the drying process. movement by temperature sensors (13) temperature measurement Ambient temperature (T-ambient) calculation YES A: Extended A: Shortened Engine under normal conditions (6) turn algorithm is applied

Claims (7)

REQUESTS l - A body (2), a drum (3) in which the laundry to be dried is placed, an air duct (4) in which the process air is circulated, a fan (5) circulating the process air in the air duct (4), the drum (3) and the fan ( 5) a heat pump system (12) comprising a motor (6) driving together and a compressor (7) executing the refrigerant cycle, an evaporator (9) for dehumidifying the process air, and a condenser (10) for heating the dehumidified process air. According to the data it receives from at least one temperature sensor (13) and temperature sensors (13) placed inside the body (2) and which enables the temperature of the ambient air (T-ambient) to be measured, the rotation of the motor (6) and the fan (5) in the straight direction during the drying cycle. a laundry dryer (l) characterized by a control unit (14) that allows changing the times (A), the stop times (B) and the reverse rotation times (C). 2 - If the ambient temperature (T-ambient) measured by the temperature sensors (13) is higher than a limit ambient temperature (T-limit) predetermined and stored in its memory, the motor (6) and fan (5) must be extended in the straight direction (A). and the control unit (14) that provides the shortening of the stopping times (B) and the reverse rotation times (C) of the motor (6) and the fan (5). 3 - A laundry dryer (l) as in Claim 1 or 2, characterized by a control unit (14) that evaluates the ambient temperatures (T-ambient) measured by the temperature sensors (13) at the beginning of the drying process applied in the laundry dryer (l). 4 - Claim 1, characterized by temperature sensors (13) that measure a predetermined number of temperatures over a predetermined period of time, and a control unit (14) that compares it with the limit temperature (T-limit) by taking the arithmetic average of the measured ambient temperatures (T-ambient). or a 2" dryer (l). 5 - A laundry dryer (1) as in Claim 1, characterized by at least one temperature sensor (13) placed in the air duct (4). 6 - A laundry dryer (1) as in Claim 1 or 5, characterized by at least one temperature sensor (13) placed around the compressor (7). 7 - Applied in a clothes dryer (1): - taking temperature measurements (100) for a predetermined time and a predetermined number of times by the temperature sensors (13) at the beginning of the drying process; - calculation (101) of a single ambient temperature (T-ambient) by the control unit (14) by taking the arithmetic average of all temperature data; - comparison of the calculated ambient temperature (T-ambient) with the limit ambient temperature (T-limit) (T-ambient > T-limit ?) (102); - if the calculated ambient temperature (T-ambient) is higher than the limit ambient temperature (T-limit), extending the motor (6) straight rotation times (A), shortening the stop times (B) and reverse rotation times (C) (103) ; - a control method comprising the steps (104) of applying the motor (6) rotation algorithm at predetermined normal conditions if the calculated ambient temperature (T-ambient) is lower than the limit ambient temperature (T-limit).