FR2934485A1 - Domestic earthenware washing and drying machine, has washing tank containing washing/rinsing liquid bath, and heat exchanger including eutectic mixture container capturing heat energy of washing/rinsing liquid bath - Google Patents

Abstract

The machine (1) has a washing tank (2) containing a washing and/or rinsing liquid bath used during operating cycle of the washing machine. A heat exchanger (5) includes a eutectic mixture container capturing heat energy of the washing and/or rinsing liquid bath. The eutectic mixture container is in thermal communication with a washing and/or rinsing liquid circulation circuit (7), where the washing and/or rinsing liquid is circulated in a washing and/or rinsing liquid circulation conduit by a pump. An independent claim is also included for a method for recovering heat energy from washing and/or rinsing liquid bath used during operating cycle of a washing machine.

Description

The present invention relates on the one hand to a washing apparatus provided with a heat exchanger so as to recover and store the heat energy of one or more washing baths and / or rinse contained in a tank washing. It also relates to a method for recovering heat energy from at least one bath of washing and / or rinsing liquid used during an operating cycle of a washing apparatus. In general, the invention relates to washing apparatus, particularly appliances for domestic use. In known washing apparatus, the heat energy of the washing and / or rinsing liquid baths is not recovered since these baths are simply drained outside of said apparatuses in network flow pipes. used water. As a result, a large amount of heat energy from the washing and / or rinsing liquid baths is wasted and the energy expended for heating said baths is not recovered for later reuse. Washing and drying machines are also known comprising a static water reserve integrated into a water filling circuit of the network of a washing tank. This water reserve retains a quantity of water at room temperature for the next washing cycle carried out by the washing machine and to dry the dishes. However, these washing and drying machines with a static water reserve have the disadvantage of not allowing the heat energy recovery of hot liquid baths. This static water reserve filled with water from the network after the last hot rinsing phase only serves to promote the condensation of the moisture contained in the washing tank during the drying phase carried out by the washing machine and drying the dishes, and dispense said machine to heat the washing cycle according to the volume of water corresponding to said reserve, the temperature of the network water at room temperature.

The static water reserve is at ambient temperature and of low capacity, with a consequent very low energy gain. Therefore, such a washing machine and drying dishes does not recover the heat energy of hot liquid baths to improve energy performance and reduce the power consumption of said machine. The present invention aims to solve the aforementioned drawbacks and to provide a washing apparatus provided with a heat exchanger so as to recover 2934485 -2- and to store the heat energy of one or more wash baths and / or or rinsing contained in a washing tub and an associated method for improving the energy performance of said washing apparatus. For this purpose, the present invention aims, in a first aspect, a washing apparatus comprising a washing tank, a heat exchanger, said washing tank containing at least a bath of washing and / or rinsing liquid used during a cycle of operation of said washing apparatus. According to the invention, said heat exchanger comprises at least one reserve of an eutectic mixture capturing the heat energy of said at least one bath of washing and / or rinsing liquid. Thus, the heat exchanger comprising at least one reserve of an eutectic mixture makes it possible to recover the heat energy of one or more washing and / or rinsing baths in a washing apparatus in order to store and restore this energy. later. A washing apparatus according to the invention makes it possible to save and reduce the energy consumption required to implement an operating cycle of said washing apparatus. According to a preferred feature of the invention, said at least one reserve of a eutectic mixture is in thermal relation with a washing and / or rinsing liquid circulation circuit. Thus, during the thermal exchange between said at least one reserve of a eutectic mixture and the washing and / or rinsing liquid circulation circuit, the solidified eutectic mixture heats up when it is placed in thermal relation with a bath of washing and / or rinsing liquid. When the eutectic mixture reaches its melting temperature, it melts at this melting temperature by capturing the heat energy of the washing and / or rinsing liquid bath. A eutectic mixture is a mixture in binary solution that melts and solidifies at a constant temperature. The use of a eutectic mixture having a change of state between a solid phase and a liquid phase makes it possible to increase the heat energy storage capacity of a heat exchanger because the latent heat of change of state is more important than sensible heat of warming, usually on the order of seventy times more. The present invention aims, in a second aspect, a heat energy recovery method of at least one bath of washing liquid and / or rinse according to the invention. The invention relates to a method for recovering heat energy from at least one bath of washing and / or rinsing liquid used during a cycle of operation of a washing apparatus, said washing apparatus comprising a wash tank, a heat exchanger, said wash tank containing said at least one bath of washing and / or rinsing liquid. According to the invention, said method comprises at least one step of collecting the heat energy of at least one bath of washing and / or rinsing liquid by said heat exchanger comprising at least one reserve of an eutectic mixture. . Thus, the heat exchanger comprising at least one reserve of a eutectic mixture makes it possible to capture the heat energy of one or more washing and / or rinsing baths contained in a wash tank of a washing apparatus in order to store and return this heat energy later. A method for recovering heat energy from at least one bath of washing and / or rinsing liquid used during a cycle of operation of a washing apparatus according to the invention makes it possible to save and reduce the energy consumption required to implement an operating cycle of said washing apparatus. Other features and advantages will become apparent in the description below. In the accompanying drawings, given by way of nonlimiting example: FIG. 1 is a schematic view illustrating a washing machine and drying the dishes during a step of collecting the heat energy of at least one bath of liquid washing and / or rinsing then during a step of heating said at least one bath of washing and / or rinsing liquid according to one embodiment of the invention; FIG. 2 is a diagrammatic view illustrating a washing machine and drying the dishes during a step of collecting the heat energy of at least one bath of washing and / or rinsing liquid and then during a step of heating an air stream introduced into a washing tub according to one embodiment of the invention; Figure 3 is a schematic view illustrating a heat exchanger comprising at least one reserve of a eutectic mixture according to one embodiment of the invention; FIG. 4 is a schematic view illustrating a circuit for circulating washing and / or rinsing liquid of a heat exchanger according to one embodiment of the invention; and Figure 5 is a schematic view illustrating a drying air flow circuit of a heat exchanger according to one embodiment of the invention. Firstly, with reference to FIGS. 1 to 5, a washing and drying machine according to the invention suitable for carrying out the recovery process of the invention will be described. heat energy of at least one bath of washing and / or rinsing liquid according to the invention. A washing and drying machine 1 comprises a vessel 2 whose front face is closed by a door (not shown). The tank 2 is surrounded by a housing 3 comprising an upper wall 3a, side walls 3b, a bottom wall 3c and a bottom wall 3d. The tank 2 comprises at least one means for spraying water with a bath of washing and / or rinsing liquid on the dishes. A water in a bath of washing and rinsing liquid is defined as water allowing the cleaning of the dishes and circulating in a hydraulic circuit of a washing machine and drying the dishes 1. The origin of the The water of a bath of washing and / or rinsing liquid is water coming from the supply network of the washing machine and drying the dishes 1. The tank 2 comprises an upper wall 2a, side walls 2b, a bottom wall 2c and a bottom wall 2d. The housing 3 of the washing machine and drying the dishes 1 is adapted to house the tank 2. Said tank 2 is adapted in particular to contain the water of the washing liquid bath and / or rinsing the phases of a cycle of cleaning. At least one basket of dishes (not shown) is mounted inside the tank 2. A basket of dishes located in the upper part of the tank 2 is designated by upper basket and a dish rack located in the lower part of the tank 2 by lower basket. The dish baskets can be pushed and removed by sliding them inside the tub 2 of the washing machine and drying the dishes 1 either at the end of a cleaning cycle for unloading the dishes or at the beginning cleaning cycle for loading dishes. This washing and drying machine 1 is provided with a pump for the circulation of the water of the washing liquid and / or rinsing bath in the tank 2. Control means make it possible to carry out cleaning programs predetermined. The tank door 2 makes it possible to close an opening made in the tank 2. This tank door 2 can thus be movable between a closed position in which it closes the opening, in a sealed manner, and an open position. In this embodiment, and in no way limiting, the door 2934485 -5- tank 2 is pivotally mounted about an axis of rotation integral with the housing of the washing machine and drying dishes 1. This washing machine and drying the dishes 1 comprises a door formed in particular of two parts. The first part of the door corresponds to the external facade 5 visible to the customer. The facade may also be a panel adapted to receive a piece of furniture of the kitchen. The second part of the door is the counter door, that is to say the inner wall of the door closing the tank 2. In the embodiment, the washing machine and drying dishes 1 operates in such a way to minimize the volume of the bath of washing liquid and / or rinsing retained in a bowl 4 formed in the bottom wall 2d of the tank 2 from the spraying means. The pump (not shown) draws water from the washing and / or rinsing liquid bath into the bowl 4 to circulate said water of the washing and / or rinsing liquid bath under pressure to the spraying means. Then, the washing and / or rinsing liquid bath returns to the bowl 4. The pump is driven by an electric motor. There will now be described a heat exchanger comprising at least one reserve of an eutectic mixture, with reference to FIGS. 1 to 5, of a washing apparatus, and in particular a washing and drying machine, in accordance with FIG. the invention. A washing and drying machine 1 comprises a washing tub 2, a heat exchanger 5. The washing tub 2 contains at least one bath of washing and / or rinsing liquid used in a cycle of washing. Operation of the washing machine and drying the dishes 1. The heat exchanger 5 comprises at least one reserve of a eutectic mixture 6 capturing the heat energy of the at least one bath of washing and / or rinsing liquid. . Thus, the heat exchanger 5 comprising at least one reserve of a eutectic mixture 6 makes it possible to recover the heat energy of one or more washing and / or rinsing baths in a washing machine and to dry the dishes. 1 to store and return this heat energy later. A washing and drying machine according to the invention saves and reduces the energy consumption required to implement a cycle of operation of said washing machine and to dry the dishes 1. A washing and drying machine according to the invention also makes it possible to use the recovered energy to improve the performance of said washing machine and to dry the dishes 1. a eutectic mixture 6 is in thermal relation with a circulation circuit of washing and / or rinsing liquid 7. Thus, during the heat exchange between the at least one reserve of a eutectic mixture 6 and the 7, the solidified eutectic mixture is heated when it is placed in thermal relation with a bath of washing and / or rinsing liquid. When the eutectic mixture reaches its melting temperature Tfe, it melts at this melting temperature Tfe by capturing the heat energy of the washing and / or rinsing liquid bath. An eutectic mixture is a binary solution mixture which melts and solidifies at constant temperature. The use of a eutectic mixture having a change of state between a solid phase and a liquid phase makes it possible to increase the heat energy storage capacity of a heat exchanger 5 because the latent heat of change of The state is more important than the sensible heat of warming, generally about seventy times more. The optimum amount of eutectic mixture to be placed in said at least one reserve of a eutectic mixture 6 of a heat exchanger 5 is determined so that said eutectic mixture can be liquefied almost completely after optimum heat exchange between said at least one bath of washing and / or rinsing liquid and said eutectic mixture. In an exemplary embodiment of the invention used in a washing machine and drying dishes 1, the initial temperature of a bath of rinsing liquid is 70 ° C to be lowered to a final temperature after heat exchange between said rinse liquid bath and the eutectic mixture equal to the melting temperature Tfe of said eutectic mixture. If it is considered that the initial temperature of the eutectic mixture is of the order of 30 ° C at the beginning of the heat exchange between the rinsing liquid bath and said eutectic mixture and that the amount of said bath of liquid liquid rinsing is 3 liters, we obtain then: 30 Me x [Cpe x (Tfe - Tie) + Lfe] = Cpw x (Th, - Tfe) x VW Me: mass of the eutectic mixture Cpe: specific heat of the eutectic Lfe: latent heat of eutectic Tfe: melting temperature of eutectic 35 Tie: initial eutectic temperature Cpw: specific heat of water Tiw: initial temperature of water 2934485 -7 Vw: volume of water Application numerical with the following assumptions: Cpe = 2.1 KJ / kg; Tfe = 38 ° C; Tie = 30 ° C; Lfe = 146KJ / kg; Cpw = 4.18 KJ / kg; Tiw = 70 ° C; Vw = 3L 5 Me û Cpw x (T ~ w û Tfe) x Vw Cpe X (Tfe û Tie) + Lfe 418.103 x (70u38) x3 Me ù, 2.1.103 x (3830) +146.10 'Me 2.5kg of Eutectic mixing The recovery of the heat energy from the rinsing liquid bath by the eutectic mixture is of the order of 4 × 10 5 J or 110 Wh for the embodiment of the invention presented above. This value of the heat energy from the rinse bath and recovered by the eutectic mixture is obtained by applying the heat exchange balance formula below: Me X [Cpe X (Tfe-Ti.) + Lfe Preferably, the eutectic mixture has a melting temperature Tfe in a range extending between 30 ° C. and 60 ° C., and preferably between 35 ° C. and preferably between 35 ° C. and 40 ° C. and 50 ° C.

The eutectic mixture may for example be composed of palm oil, cocoa butter or paraffin for use in a washing apparatus 1 requiring a melting temperature Tfe within a range of from 30 ° C to 40 ° C. 60 ° C.

This eutectic mixture thus makes it possible to recover and store the heat energy of at least one bath of washing and / or rinsing liquid before said at least one bath of washing and / or rinsing liquid is drained out of the water. washing and drying machine 1. The emptying of at least one bath of washing and / or rinsing liquid from the washing and drying machine 1 can be carried out via a drain line connected to the washing tub 2 and a drain pump. Said at least one bath of washing and / or rinsing liquid is thus discharged outside the washing machine and to dry the dishes 1 in a pipe of a wastewater network having previously recovered the energy heat of said at least one bath of washing and / or rinsing liquid. In this way, the heat energy of at least one bath of washing and / or rinsing liquid is recovered and can be stored and then returned by the eutectic mixture so as to reduce the energy consumption of the In addition, such a heat exchanger 5 comprising at least one reserve of a eutectic mixture 6 capturing the heat energy of at least one bath of washing liquid 5 and / or rinsing avoids the discharge of hot liquids and the environment. The circulation circuit of at least one washing and / or rinsing liquid 7 comprises at least one washing and / or rinsing liquid circulation line in thermal relation with said at least one reserve of a eutectic mixture 6. Said at least one washing and / or rinsing liquid is circulated in said at least one pipe by a pump (not shown). Said at least one washing and / or rinsing liquid can be circulated by a single passage in said at least one pipe so as to create a heat exchange between said at least one washing and / or rinsing liquid and the Eutectic mixture capturing a major part of the heat energy of said at least one washing and / or rinsing liquid. Said at least one washing and / or rinsing liquid can be recirculated by a successive passage in said at least one pipe so as to create a heat exchange between said at least one washing and / or rinsing liquid and the eutectic mixture capturing substantially all the heat energy of said at least one washing and / or rinsing liquid. Recirculating said at least one washing and / or rinsing liquid in said at least one line of the circulation circuit of at least one washing and / or rinsing liquid 7 makes it possible to improve the heat exchange between said at least one a washing and / or rinsing liquid and the eutectic mixture.

The washing and drying machine 1 comprises a device for recirculating at least one washing and / or rinsing liquid before the latter is emptied, so as to promote the heat exchange with the eutectic mixture. . The circulation circuit of at least one washing and / or rinsing liquid 7 is thermally related to the heat exchanger 5 comprising the at least one reserve of a eutectic mixture 6. Said at least one circulation of the circulation circuit of at least one washing and / or rinsing liquid 7 may be in contact with the said at least one reserve of a eutectic mixture 6. Said at least one circulation line of the circulation circuit of at least at least one washing and / or rinsing liquid 7 can be produced in the form of a loop supplied with washing and / or rinsing liquid by the main circulating circuit of said washing and / or rinsing liquid of the machine 1 using a pump. A valve may be used to open the at least one circulation line of the circulation circuit of a washing and / or rinsing liquid 7 placed in thermal relation with the said at least one reserve of a eutectic mixture 6. while the main circulation circuit of the washing and / or rinsing liquid of the machine 1 is closed by a distribution valve hydraulically connected to the pump of said main circuit. The draining of at least one bath of washing and / or rinsing liquid from the washing machine and drying the dishes 1 is carried out after the circulation and / or recirculation of the at least one bath of washing liquid and or rinsing in at least one line of the circulation circuit of at least one washing and / or rinsing liquid 7 in thermal relation with said at least one reserve of a eutectic mixture 6. The choice of the mixture of eutectic to be introduced into said at least one reserve of a eutectic mixture 6 of the heat exchanger 5, with regard to its melting temperature Tfe, is important for optimizing the recovery of the heat energy of at least one bath washing and / or rinsing liquid.

Indeed, the melting temperature Tfe of the eutectic mixture is adapted to efficiently recover the heat energy of said at least one bath of washing and / or rinsing liquid. If the Tfe temperature of the eutectic mixture is too high, said at least one bath of washing and / or rinsing liquid cools too rapidly without allowing complete change of state of the eutectic mixture. If the temperature Tfe of the eutectic mixture is too low, the change in state of the eutectic mixture can occur during a rise in temperature of at least one bath of washing and / or rinsing liquid causing a slowing of the heating said at least one bath of washing and / or rinsing liquid. Therefore, the energy consumed to reach the programmed temperature of said at least one bath of washing and / or rinsing liquid is greater. The heat exchanger 5 comprising said at least one eutectic reserve 6 may be used to heat at least one bath of washing and / or rinsing liquid constituted from the cold water of the network introduced into the washing tub. 2.

A bath of rinse liquid may be heated by recovering the heat energy captured by said at least one reserve of a eutectic mixture 6 following the capture of the heat energy of a bath of washing liquid. The heat exchanger 5 comprising the at least one eutectic reservoir 6 may be used to heat the thermally connected rinse bath with the eutectic mixture which has been heated and liquefied by the liquid bath. preceding washing having been drained from the washing tank 2. Said at least one reserve of a eutectic mixture 6 is thermally insulated by at least one heat-insulating means 11. Thus, the heat energy captured by said at least one reserve of a eutectic mixture 6 is preserved by means of thermal insulation means 11 so as to prevent heat losses in the washing machine and to dry the dishes 5 1. Said at least one means thermal insulation 11 may be a plate of thermally insulating material, such as polystyrene, disposed between a side wall 2b of the washing tank 2 and said at least one reserve of a mixture of utectic 6, and / or a plate of a thermally insulating material, such as polystyrene, disposed between a side wall 3b of the housing 3 and said at least one reserve of a eutectic mixture 6. Of course, the embodiment of the invention described above in a washing machine and drying dishes can be implemented in a similar manner in a washing machine.

In one embodiment of the invention, said at least one reserve of a eutectic mixture 6 is in thermal relation with a drying air circulation circuit 8. Thus, the heat energy captured by the eutectic mixture in at least one bath of washing and / or rinsing liquid is returned to drying air circulated in the washing apparatus, and in particular in the washing and drying machine illustrated in FIGS. 1 to 5. In this way, the drying performance of the washing and drying machine 1 having a drying air dryer are improved.

The drying air circulation circuit 8 is partially or totally discharged outside the washing apparatus, in particular from the washing machine and the dishes 1, from the air contained in the tank. 2. The drying air circulation circuit 8 of the washing and drying machine 1 comprises at least one drying air introduction port connected to the outside of said machine 1, a drying air circulation duct 9 connected to the heat exchanger 5 and arranged between at least one side wall 2b of the washing tub 2 and a side wall 3b of the casing 3 of said machine 1, a circulation duct 5 drying air 10 connected on the one hand to the washing tank 2 in closed circuit and on the other hand to at least one drying air outlet opening opening outside said machine 1. Circulation drying air in the drying air circulation circuit 8 can be set It is operated by a fan 11 placed in a drying air circulation duct. The drying air circulation circuit 8 comprises at least one air introduction orifice coming from the outside of the washing apparatus, in particular from the washing machine and to drying the dishes 1.

Said at least one air introduction orifice is formed close to said at least one reserve of a eutectic mixture 6. The heat exchanger 5 comprising said at least one eutectic reserve 6 can be used for heating the fresh air introduced into the washing tank 2 to implement a drying air circulation with partial or total evacuation outside the washing machine and drying dishes 1. The air introduced into the The washing and drying machine 1 is thermally connected, via the heat exchanger 5, with the eutectic mixture having been previously heated and liquefied by at least one bath of washing liquid and / or rinsing. The heat energy captured and stored by the eutectic mixture during the heat exchange with at least one bath of washing and / or rinsing liquid having caused the change of state of said eutectic mixture is returned to the drying air. introduced into the washing machine and to dry the dishes 1. The fresh drying air, introduced into the washing machine and to dry the dishes 1 and admitted through the heat exchanger 5, heats up and increases its capacity 20 to capture moisture without losing the heat energy restored by the eutectic mixture during the introduction of said drying air into the washing tank 2. During a drying step carried out by a circulation of air of drying in a washing machine and drying dishes 1, a portion of the drying air is not recycled and discharged outside said machine 1. This drying air not recycled and 25 evacuated outside the washing machine e To dry dishes 1 is then replaced by fresh drying air introduced by said at least one drying air introduction port. Said at least one reserve of a eutectic mixture 6 is preferably disposed near said at least one air introduction orifice so as to simplify the drying air circulation circuit 8. In the embodiment of the with reference to FIGS. 3 to 5, the heat exchanger 5 comprising said at least one reserve of a eutectic mixture 6 consists of at least two heat exchange surfaces arranged on either side of said at least one a reserve of an eutectic mixture 6.

With reference to FIGS. 3 and 4, a heat exchange surface is formed along a side wall 2b of the tank 2 so as to constitute a eutectic heat exchanger between said at least one reserve of an eutectic mixture. 6 and a circuit 2934485 -12- circulation of at least one washing and / or rinsing liquid 7 in which water from the network is circulated. The circulation circuit of at least one washing and / or rinsing liquid 7 comprises a closed envelope 12, illustrated in FIG. 4, in which water from the network enters through an inlet opening 13, said water the network rises along a hot wall 14 vis-à-vis the said at least one reserve of a eutectic mixture 6. The water of the network heats up gradually, said water network flows into an outlet channel 15, then said water of the network exits through an outlet opening 16. With reference to FIGS. 3 and 5, a heat exchange surface is formed along a side wall 3b of the housing 3 so as to forming a eutectic heat exchanger air between said at least one reserve of a eutectic mixture 6 and a drying air circulation circuit 8 in which air is circulated. The drying air circulation circuit 8 comprises a wall 17 consisting of fins 18, illustrated in FIG. 5, forming air circulation channels 19 facing said at least one reserve of air. A eutectic mixture 6. The air circulation channels 19 converge towards a drying air intake opening 20 opening into the tank 2. The drying air inlet is formed by openings 21 along the edges The fins 18 of the wall 17 are arranged in the form of a spiral around the drying air intake opening 20 opening into the tank 2. The fins 18 of the wall 17 have a section V-shaped, as shown in Figure 5 by the detail view shown in dashed lines, so as to optimize the heat exchange between the eutectic mixture and the drying air. The V-shape of the fin section 18 of the wall 17 makes it possible to increase the heat exchange surface between the eutectic mixture and the drying air. The air circulation channels 19 are curved from an edge of the wall 17 to the drying air admission opening 20 opening into the tank 2. The progressive curvatures and the sections of the air circulation channels 19 are dimensioned so as to optimize the heat exchange of the drying air with said at least one reserve 30 of a eutectic mixture 6. The heat exchange is carried out by sweeping the drying air along a wall of said at least one reserve of a eutectic mixture 6 and on a maximum exchange surface. Of course, the embodiment of the invention previously described in a washing and drying machine can be carried out analogously in a washing and drying machine, by introducing the drying air. firstly in the washing tub and in a drum housed inside said washing tub. Of course, the recovery of the heat energy of at least one washing bath 2934485 and / or rinsing may be used to create a heat exchange with a circulation circuit washing liquid and / or rinse 7 , with a drying air circulation circuit 8 so as to implement these heat exchanges during the same operating cycle of a washing apparatus 1, or even one of these heat exchanges during In addition, the recovery of the heat energy of at least one washing bath and the heat energy recovery of at least one rinsing bath can be used. In order to create a heat exchange with a drying air circulation circuit 8. A heat energy recovery method of at least one bath of washing and / or rinsing liquid used in the present invention will now be described. an operating cycle of an app washing device according to the invention. The method comprises at least one step of collecting the heat energy of at least one bath of washing and / or rinsing liquid through the heat exchanger 5 comprising at least one reserve of a eutectic mixture 6.

Thus, the heat exchanger 5 comprising at least one reserve of a eutectic mixture 6 makes it possible to capture the heat energy of one or more washing and / or rinsing baths contained in a washing tank 2 of a washing apparatus 1 to store and return this heat energy later. A method for recovering heat energy from at least one wash and / or rinsing liquid bath used during an operating cycle of a washing apparatus according to the invention saves and reduces the energy consumption required to implement an operating cycle of said washing apparatus 1. The step of collecting the heat energy of at least one bath of washing and / or rinsing liquid comprises a circulating and / or recirculating phase of at least one bath of washing and / or rinsing liquid in thermal relation with said at least one reserve of a eutectic mixture 6. Thus, said at least one liquid bath of washing and / or rinsing is circulated and / or recirculated from the washing tub 2, and in particular from an area located at the bottom of said washing tub 2, to said at least one reserve of an eutectic mixture 6 of a heat exchanger 5 so as to capture the heat energy of said at least one bath of washing and / or rinsing liquid. The passage of said at least one bath of washing and / or rinsing liquid along at least one wall of said at least one reserve of a eutectic mixture 6 makes it possible to create a heat exchange between a bath of washing liquid and and / or rinsing and eutectic mixing so as to recover the heat energy of said at least one bath of washing and / or rinsing liquid and thereafter store and restore it in a subsequent step of the process carried out by a washing apparatus 1. The method comprises at least one step of storing the heat energy of at least one bath of washing and / or rinsing liquid by said at least one reserve of an eutectic mixture. 6 after said step of collecting the heat energy of at least one bath of washing and / or rinsing liquid.

Thus, the heat energy of at least one bath of washing and / or rinsing liquid is preserved by an eutectic mixture until the next step of the process carried out by the washing apparatus 1 benefiting from the restitution. of said heat energy so as to heat a bath of washing liquid and / or subsequent rinse during a washing phase and / or to heat drying air introduced into said washing apparatus 1 during a drying phase, or to use the recovered energy to improve the performance of said washing apparatus 1. Said method comprises at least one step of draining at least one bath of washing and / or rinsing liquid after said step capturing the heat energy of at least one bath of washing and / or rinsing liquid.

Thus, the heat energy of at least one bath of washing and / or rinsing liquid is recovered and then said at least one bath of washing and / or rinsing liquid is drained outside the washing apparatus. washing 1 so as to avoid wasting the energy consumed to heat said at least one bath of washing and / or rinsing liquid by draining the washing tub 2 of a bath of washing liquid and / or used rinse.

The method comprises at least one step of heating at least one bath of washing and / or rinsing liquid by restitution of the heat energy captured by said at least one reserve of a eutectic mixture. Thus, said at least one bath of washing and / or rinsing liquid is circulated and / or recirculated from the washing tub 2, and in particular from an area at the bottom of said wash tub 2, to said at least one reserve of a eutectic mixture 6 of a heat exchanger 5 so as to capture the heat energy of the eutectic mixture and to limit the energy consumed to heat said at least one bath of washing liquid and / or rinsing. The passage of said at least one bath of washing and / or rinsing liquid along at least one wall of said at least one reserve of a eutectic mixture 6 makes it possible to create a heat exchange between a bath of washing liquid and / or rinsing and an eutectic mixture so as to recover the heat energy of the eutectic mixture for heating said at least one bath of washing and / or rinsing liquid used during a phase of a washing cycle set in motion. by washing apparatus 1.

The method comprises at least one water filling step of the network preceding said step of heating at least one bath of washing and / or rinsing liquid. Thus, said at least one bath of washing and / or rinsing liquid is at least partially composed of water from the network, in particular to improve the washing and / or rinsing performance of the washing apparatus. 1 and to renew the liquid of said at least one bath.

The mains water introduced into the washing tub 2 may be at a temperature below the temperature programmed for the operating cycle of the washing apparatus 1 and therefore requiring heating. The eutectic mixture makes it possible to heat this water of the network by heat exchange so as to limit the energy consumption to reach the temperature programmed for the operating cycle of the washing apparatus 1. In one embodiment of the invention , a bath of rinsing liquid is heated by restitution of the heat energy captured by said at least one reserve of a eutectic mixture 6 following the capture of the heat energy of a bath of washing liquid.

At least one bath of washing and / or rinsing liquid is heated by recovering the heat energy captured by said at least one reserve of a eutectic mixture 6 from a bath of washing liquid and / or Rinsing a previous operating cycle of the washing apparatus 1. Thus, the heat energy captured by the eutectic mixture during a cycle of operation of the preceding washing apparatus 1 is returned to at least one bath. washing liquid and / or rinsing a subsequent operating cycle of said washing apparatus 1 so as to limit the energy consumption during the implementation of said next operating cycle. Said at least one reserve of a eutectic mixture 6 is thus adapted to store the heat energy between two operating cycles of a washing apparatus 1. The method comprises at least one step of heating an air flow drying device introduced into said washing tank 2 by recovering the heat energy captured by said at least one reserve of a eutectic mixture 6.

Thus, the drying air is circulated and / or recirculated in a drying air circulation circuit 8 to said at least one reserve of a eutectic mixture 6 of a heat exchanger 5 so that capturing the heat energy of the eutectic mixture and limiting the energy consumed to heat said drying air. The passage of said drying air along at least one wall of said at least one reserve of a eutectic mixture 6 makes it possible to create a heat exchange between said drying air and an eutectic mixture so as to recover the heat energy. of the eutectic mixture for heating said drying air used during a drying cycle phase carried out by a washing apparatus 1. The drying air flow introduced into said washing tank is heated by recovering the heat energy captured by said at least one reserve of an eutectic mixture following the capture of the heat energy of at least one bath of washing and / or rinsing liquid. Thus, the heat energy captured by the eutectic mixture during a washing and / or rinsing phase of an operating cycle of the washing apparatus 1 using at least one bath of washing and / or rinsing liquid is returned to the drying air during a drying phase of an operating cycle of said washing apparatus 1 so as to limit the energy consumption during the implementation of said drying phase of said cycle of drying. operation. Said at least one reserve of a eutectic mixture 6 is thus adapted to store the heat energy between at least one washing and / or rinsing phase and a drying phase of an operating cycle of the washing apparatus 1 .

The previously developed embodiment relates to a washing and drying machine. The same methods and devices can be used on a washing machine or on a washing and drying machine.

Claims (16)

CLAIMS Washing apparatus (1) comprising a washing tub (2), a heat exchanger (5), said washing tub (2) containing at least one bath of washing and / or rinsing liquid used during an operating cycle of said washing apparatus (1), characterized in that said heat exchanger (5) comprises at least one reserve of a eutectic mixture (6) capturing the heat energy of said at least one bath of washing liquid and / or rinsing. 2- washing apparatus (1) according to claim 1, characterized in that said at least one reserve of a eutectic mixture (6) is in thermal relation with a circulation circuit for washing and / or rinsing liquid (7). ). 3- Washing apparatus (1) according to claim 2, characterized in that said circulation circuit of at least one washing and / or rinsing liquid (7) comprises at least one washing liquid circulation line and / or rinsing in thermal relation with said at least one reserve of a eutectic mixture (6), said at least one washing and / or rinsing liquid being circulated in said at least one pipe by a pump. 4- Washing apparatus (1) according to any one of claims 1 to 3, characterized in that said at least one reserve of a eutectic mixture (6) is in thermal relation with a drying air circulation circuit (8). 5. Washing apparatus (1) according to claim 4, characterized in that said drying air circulation circuit (8) is partially or completely discharged outside said washing apparatus (1) air contained in said washing tub (2), said drying air circulation circuit (8) comprising at least one air introduction port from outside said washing apparatus (1), said at least one air introduction port being formed near said at least one reserve of a eutectic mixture (6). 6. Washing apparatus (1) according to any one of claims 1 to 5, characterized in that said at least one reserve of a eutectic mixture (6) is thermally insulated by at least one thermal insulation means (11). ). 7- A method for recovering heat energy from at least one bath of washing and / or rinsing liquid used during an operating cycle of a washing apparatus (1), said washing apparatus (1) comprising a washing tub (2), a heat exchanger (5), said washing tub (2) containing said at least one bath of washing and / or rinsing liquid, characterized in that said method comprises at least one step capturing the heat energy of at least one bath of washing and / or rinsing liquid by said heat exchanger (5) comprising at least one reserve of a eutectic mixture (6). 8- A method for recovering heat energy from at least one bath of washing and / or rinsing liquid according to claim 7, characterized in that said step of collecting the heat energy of at least one bath of liquid washing and / or rinsing comprises a circulating and / or recirculating phase of at least one bath of washing and / or rinsing liquid in thermal relation with said at least one reserve of an eutectic mixture (6) . 9. A method for recovering heat energy from at least one bath of washing and / or rinsing liquid according to claim 7 or 8, characterized in that said method comprises at least one step of storing the heat energy. at least one bath of washing and / or rinsing liquid by said at least one reserve of a eutectic mixture (6) after said step of collecting the heat energy of at least one bath of washing liquid and / or rinsing. 10- A method for recovering heat energy from at least one bath of washing and / or rinsing liquid according to any one of claims 7 to 9, characterized in that said process comprises at least one emptying step of at least one bath of washing and / or rinsing liquid after said step of collecting the heat energy of at least one bath of washing and / or rinsing liquid. 11-Process for recovering heat energy from at least one bath of washing and / or rinsing liquid according to any one of claims 7 to 10, characterized in that said process comprises at least one heating step of at least one bath of washing and / or rinsing liquid by restitution of the heat energy captured by said at least one reserve of a eutectic mixture (6). 12- A method for recovering heat energy from at least one bath of washing and / or rinsing liquid according to claim 11, characterized in that said method comprises at least one step of filling the water network preceding said step heating at least one bath of washing and / or rinsing liquid. 13- A method for recovering heat energy from at least one bath of washing and / or rinsing liquid according to claim 11 or 12, characterized in that a bath of rinsing liquid is heated by restitution of the heat energy captured by said at least one reserve of a eutectic mixture (6) following the capture of the heat energy of a bath of washing liquid. 14- A method for recovering heat energy from at least one bath of washing and / or rinsing liquid according to claim 11 or 12, characterized in that at least one bath of washing and / or rinsing liquid. is heated by recovering the heat energy captured by said at least one reserve of a eutectic mixture (6) following the heat energy capture of a washing liquid bath and / or rinsing liquor. a previous operating cycle of said washing apparatus (1). 15- A method for recovering heat energy from at least one bath of washing and / or rinsing liquid according to any one of claims 7 to 14, characterized in that said process comprises at least one heating step 5 a flow of drying air introduced into said washing tank (2) by restoring the heat energy captured by said at least one reserve of a eutectic mixture (6). 16- A method for recovering heat energy from at least one bath of washing and / or rinsing liquid according to claim 15, characterized in that said flow of drying air introduced into said washing tub (2) is heated by recovering the heat energy captured by said at least one reserve of a eutectic mixture (6) following the capture of the heat energy of at least one bath of washing and / or rinsing liquid.