CN115369630A - Clothes drying device and washing machine - Google Patents

Abstract

The invention discloses a clothes drying device and a washing machine, wherein the clothes drying device comprises a drying cavity and a condensation dehumidifier; the condensation dehumidifier comprises a double-cold heat exchanger, and the double-cold heat exchanger is provided with a hot fluid flow channel for wet and hot air to flow through and a cold fluid flow channel for cooling medium to flow through, wherein the cooling medium comprises cooling liquid and indoor air so as to exchange heat between the cooling medium and the wet and hot air to condense the wet and hot air; a first fan for driving the hot and humid air to flow toward the hot fluid flow path; a cold source; a second fan for driving the indoor air to flow to the cold fluid flow passage; a temperature sensor for detecting the temperature of the indoor air; a controller for controlling at least the second fan to operate when the indoor air temperature is less than a first target temperature value; and when the indoor air temperature is not less than the first target temperature value, the cooling source is used for introducing cooling liquid into the cold fluid flow channel. This application adopts the mode that liquid cooling and forced air cooling combined together, selects coolant liquid and/or room air to carry out the condensation dehumidification to damp and hot air according to room air temperature, has improved drying efficiency, has still saved the energy.

Description

Clothes dryer and washing machine

technical field

The present invention relates to the technical field of clothes drying, more specifically, to a clothes drying device, and also to a washing machine.

Background technique

A clothes dryer or a washing machine with a clothes drying function uses hot air to dry clothes quickly. The air that has dried clothes has high heat and moisture content, and direct discharge will seriously affect the surrounding environment. Through condensation and dehumidification, this part of the air can be recycled and reused to achieve zero emission of hot and humid exhaust gas. The principle of condensation dehumidification is to cool the hot and humid air below the dew point temperature to condense the water vapor in it to achieve the purpose of reducing the water vapor content in the air, and then reheat the air to meet the relative humidity and temperature that meets the requirements, and then re-condition the clothes to dry.

However, at present, the purpose of condensation and dehumidification of hot and humid air is achieved by introducing indoor air to exchange heat with hot and humid air. Due to the limitation of indoor air temperature, the efficiency of condensation and dehumidification is low, which affects the drying efficiency.

Contents of the invention

In view of this, the object of the present invention is to disclose a clothes drying device to improve drying efficiency.

Another object of the present invention is to disclose a washing machine with the above clothes drying device, so as to improve the drying efficiency.

In order to achieve the above object, the present invention discloses the following technical solutions:

A clothes drying device, comprising a drying chamber for placing clothes, and a condensation dehumidifier for condensing and dehumidifying the hot and humid air discharged from the drying chamber, the condensation dehumidifier comprising:

The dual-cooling heat exchanger has a hot fluid flow channel and a cold fluid flow channel sealed and separated, the hot fluid flow channel is used for hot and humid air to flow through, and the cold fluid flow channel is used for cooling medium to flow through, cooling The medium includes cooling liquid and indoor air, so that the cooling medium exchanges heat with the hot and humid air to condense the hot and humid air. The inlet of the hot fluid flow channel communicates with the exhaust port of the drying chamber. The air outlet of the drying chamber communicates with the air return port of the drying chamber;

a first fan driving hot and humid air to flow to the hot fluid passage;

a cold source for feeding cooling liquid into the cold fluid passage;

a second fan driving indoor air to the cold fluid flow path;

A temperature sensor for detecting indoor air temperature;

A controller connected to the temperature sensor, when the indoor air temperature is lower than the first target temperature value, the controller at least controls the operation of the second fan so that the cold fluid channel flows into the indoor air; when the When the indoor air temperature is not less than the first target temperature value, the controller controls the second fan to stop running and controls the cold source to pass cooling liquid into the cold fluid channel;

Wherein, a heater is arranged between the air outlet of the hot fluid channel and the air return port of the drying chamber.

Preferably, in the above drying device, when the indoor air temperature is less than the first target temperature value and greater than the second target temperature value, the controller controls the operation of the second fan and controls the cooling source into the cold fluid channel; when the indoor air temperature is lower than the second target temperature value, the controller controls the second fan to run, and at the same time controls the cooling source to stop flowing to the Cooling liquid is passed into the cold fluid flow channel;

Wherein, the second target temperature value is smaller than the first target temperature value.

Preferably, in the above clothes drying device, the cold fluid flow channel includes a liquid cooling fluid flow channel and an air cooling fluid flow channel, the liquid cooling fluid flow channel is used for cooling liquid to flow through, and the air cooling fluid flow channel For the flow of indoor air; the cooling source includes:

A liquid storage structure storing cooling liquid, the liquid outlet of the liquid storage structure is connected to the liquid inlet of the liquid cooling fluid flow channel, the liquid return port of the liquid storage structure is connected to the liquid cooling fluid flow channel outlet connection;

A circulation pump that drives the cooling liquid to circulate between the liquid storage structure and the liquid cooling fluid channel.

Preferably, the above clothes drying device further includes a semiconductor cooler for cooling the cooling liquid and a third fan arranged at the hot end of the semiconductor cooler, and the hot end of the semiconductor cooler is provided with cooling fins.

Preferably, in the above clothes drying device, the semiconductor refrigerator is arranged between the liquid outlet of the liquid storage structure and the liquid inlet of the liquid cooling fluid channel, and the cold end of the semiconductor refrigerator is provided with Heat exchange channels through which coolant flows.

Preferably, in the above clothes drying device, the heat exchange channel is a serpentine coil, and the serpentine coil is in close contact with the cold end of the semiconductor refrigerator.

Preferably, in the above clothes drying device, the liquid storage structure is a liquid storage tank with an opening at the top, the semiconductor refrigerator is arranged in the liquid storage tank, the third fan is arranged in the opening, and the The cold end of the semiconductor refrigerator is in contact with the cooling liquid in the liquid storage tank.

Preferably, in the above clothes drying device, the double-cooling heat exchanger includes multi-layer heat exchange plates, and a first interval is provided between adjacent heat exchange plates to form multiple layers of the hot fluid flow channel, each The heat exchange plates in each layer include two layers of liquid cooling plates arranged in parallel, with a second space between them to form the air-cooled fluid channel, and the two layers of liquid cooling plates are provided with cavities to form the liquid cooling fluid channel;

Wherein, the liquid outlet of the liquid storage structure is connected to the liquid inlet of all the liquid-cooled fluid channels through a liquid supply pipe, and the liquid outlets of all the liquid-cooled fluid channels are connected through a confluence A liquid return pipe is connected to the liquid return port of the liquid storage structure.

Preferably, in the above clothes drying device, the two layers of the liquid cooling plates are inflatable plates, and the outer surface for contacting with hot and humid air is covered with ribs.

Preferably, in the above clothes drying device, the cooling liquid is a mixed liquid of water, ethylene glycol, and graphene;

The hot fluid flow direction of the hot and humid air in the hot fluid flow channel is perpendicular to the cold fluid flow direction of the cooling medium in the cold fluid flow channel.

It can be seen from the above technical solutions that the clothes drying device disclosed in the present invention includes a drying chamber for placing clothes, and a condensation dehumidifier for condensing and dehumidifying the hot and humid air discharged from the drying chamber; wherein, the condensation dehumidifier includes The double cooling heat exchanger has a hot fluid flow channel and a cold fluid flow channel sealed and separated, the hot fluid flow channel is used for the flow of hot and humid air, and the cold fluid flow channel is used for the flow of the cooling medium, the cooling medium includes the cooling liquid and indoor air, so that the cooling medium exchanges heat with the hot and humid air to condense the hot and humid air. The air inlet of the hot fluid flow channel is connected to the exhaust port of the drying chamber, and the air outlet of the hot fluid flow channel is connected to the return air port of the drying chamber. Communication; the first fan that drives hot and humid air to flow to the hot fluid flow channel; the cold source that is used to feed cooling fluid to the cold fluid flow channel; the second fan that drives indoor air to flow to the cold fluid flow channel; A temperature sensor; a controller connected to the temperature sensor, when the indoor air temperature is less than the first target temperature value, the controller at least controls the operation of the second fan so that the cold fluid flow path flows into the indoor air; when the indoor air temperature is not less than the first target temperature value, the controller controls the second fan to stop running and controls the cold source to pass cooling liquid into the cold fluid channel; wherein, a heater is arranged between the air outlet of the hot fluid channel and the air return port of the drying chamber.

When the clothes drying device is drying, the hot air flows through the surface of the clothes in the drying chamber to heat the clothes and take away a large amount of water vapor generated by evaporation. At this time, the air is hot and humid air with high heat and high humidity. The exhaust port of the drying chamber filters the hot and humid air; then it is led by the first fan to the air inlet of the hot fluid flow channel of the double-cooling heat exchanger, and enters the hot fluid flow channel of the double-cooling heat exchanger;

At the same time, the temperature sensor detects the temperature of the indoor air, and sends the detected temperature to the controller. When the indoor air temperature is lower than the first target temperature value, the controller at least controls the operation of the second fan so that the cold fluid channel flows into the indoor air, At least indoor air is used as the cooling medium; when the indoor air temperature is not less than the first target temperature value, the controller controls the second fan to stop running and controls the cold source to pass cooling liquid into the cold fluid channel, using the cooling liquid as the cooling medium.

In the double-cooling heat exchanger, the hot and humid air with a high temperature is cooled by the cooling medium with a low temperature to reduce the temperature and humidity of the hot and humid air; the hot and humid air is condensed and discharged from the outlet of the hot fluid flow channel, and then drained to The heater, after being heated to the target drying temperature, enters the drying chamber from the air return port of the drying chamber, and is recycled and reused for drying clothes; the temperature of the cooling medium rises after heat exchange, and flows out from the outlet of the cold fluid channel.

In summary, the dual-cooling heat exchanger of the present invention adopts a combination of liquid cooling and air cooling, and selects cooling liquid and/or indoor air as the cooling medium according to the temperature of the indoor air to condense and dehumidify the hot and humid air; when the indoor air When the temperature is lower than the first target temperature value, the hot and humid air is condensed and dehumidified by air-cooling at least through the low-temperature indoor air when the weather is cold, which reduces the heat exchange of cooling liquid condensation, thereby saving energy; when the indoor air temperature Not less than the first target temperature value, when the indoor air is not enough to meet the condensation and dehumidification requirements of hot and humid air, the hot and humid air will be condensed and dehumidified by liquid cooling through the cooling liquid, thereby eliminating the limitation of the indoor air temperature, and the specific heat capacity of the cooling liquid is higher Large, high condensation dehumidification efficiency, thus improving the drying efficiency.

In addition, the hot and humid waste gas of the present invention is not directly exhausted, and is used to circulate and dry clothes, thereby reducing the impact on the environment.

The present invention also discloses a washing machine, which includes a washing drum with a washing chamber, and any one of the above drying devices, and the washing chamber forms the drying chamber of the drying device, because the above drying device has the above effects , the washing machine with the above drying device has the same effect, so it will not be repeated here.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are For some embodiments of the present invention, those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic diagram of the working principle of the condensation dehumidifier of the clothes drying device disclosed in the embodiment of the present invention;

Fig. 2 is a schematic structural view of a double-cooled heat exchanger disclosed in an embodiment of the present invention;

Fig. 3 is a schematic diagram of the flow of cold and hot fluids in the double-cooled heat exchanger disclosed in the embodiment of the present invention;

Fig. 4 is a schematic structural diagram of the relative positions of the semiconductor refrigerator and the third fan disclosed in the embodiment of the present invention;

Fig. 5 is a schematic diagram of the structure of the heat exchange interface of the liquid cooling plate disclosed in the embodiment of the present invention.

Detailed ways

The embodiment of the invention discloses a clothes drying device, which improves the drying efficiency.

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to the accompanying drawings 1-5, the clothes drying device disclosed in the embodiment of the present invention includes a drying chamber for placing clothes, and a condensation dehumidifier for condensing and dehumidifying the hot and humid air discharged from the drying chamber; wherein, the condensation dehumidifier It includes a double-cooling heat exchanger 1, which has a sealed and separated hot fluid flow channel 13 and a cold fluid flow channel. The hot fluid flow channel 13 is used to flow through the hot and humid air, and the cold fluid flow channel is used to flow through the cooling medium. The medium includes cooling liquid and indoor air, so that the cooling medium exchanges heat with the hot and humid air to condense the hot and humid air. The air return port of the drying chamber is connected; the first fan 7 that drives the hot and humid air to flow to the hot fluid flow channel 13; the cold source for passing cooling liquid to the cold fluid flow channel; the second fan that drives the indoor air to flow to the cold fluid flow channel 6. A temperature sensor for detecting indoor air temperature; a controller connected to the temperature sensor. When the indoor air temperature is lower than the first target temperature value, the controller at least controls the operation of the second fan 6 so that the cold fluid flow path flows into the indoor air ; When the indoor air temperature is not less than the first target temperature value, the controller controls the second fan 6 to stop running and controls the cold source to feed cooling liquid into the cold fluid flow channel; wherein, the air outlet of the hot fluid flow channel 13 is connected with the drying A heater is arranged between the gas return ports of the cavity.

It should be noted that the body of the clothes drying device is provided with an air inlet for introducing indoor air into the cold fluid flow path and an air outlet for leading indoor air out of the cold fluid flow path, both of which are in communication with the outside world.

When the clothes drying device is drying, the hot air flows through the surface of the clothes in the drying chamber to heat the clothes and take away a large amount of water vapor generated by evaporation. At this time, the air is hot and humid air with high heat and high humidity. The exhaust port of the drying chamber filters the hot and humid air; then it is led by the first fan 7 to the air inlet of the hot fluid flow channel 13 of the double cooling heat exchanger 1, and enters the hot fluid flow channel 13 of the double cooling heat exchanger 1 ;

At the same time, the temperature sensor detects the temperature of the indoor air, and sends the detected temperature to the controller. When the indoor air temperature is lower than the first target temperature value, the controller at least controls the operation of the second fan 6 so that the cold fluid flow path flows into the indoor air. , at least use the indoor air as the cooling medium; when the indoor air temperature is not less than the first target temperature value, the controller controls the second fan 6 to stop running and controls the cold source to feed the cooling liquid into the cold fluid flow channel, and the cooling liquid is used as the cooling medium. medium.

In the double-cooling heat exchanger 1, the hot and humid air with a higher temperature is cooled by the cooling medium with a lower temperature to reduce the temperature and humidity of the hot and humid air; the hot and humid air is condensed and discharged from the outlet of the hot fluid flow channel 13, Drainage to the heater, heated to the target drying temperature, enters the drying chamber from the air return port of the drying chamber, and recycles it for drying clothes again; the temperature of the cooling medium rises after heat exchange, and flows out from the outlet of the cold fluid flow channel .

In summary, the dual-cooling heat exchanger 1 of the present invention adopts a combination of liquid cooling and air cooling, and selects cooling liquid and/or indoor air as the cooling medium to condense and dehumidify the hot and humid air according to the temperature of the indoor air; When the temperature of the air is lower than the first target temperature value, the hot and humid air is condensed and dehumidified by air-cooling at least through the low-temperature indoor air when the weather is cold, which reduces the heat exchange of cooling liquid condensation, thereby saving energy; when the indoor air The temperature is not less than the first target temperature value, and when the indoor air is not enough to meet the condensation and dehumidification requirements of the hot and humid air, the hot and humid air is condensed and dehumidified through the cooling liquid, thereby eliminating the limitation of the indoor air temperature, and the specific heat capacity of the cooling liquid Larger, higher condensation and dehumidification efficiency, thus improving drying efficiency.

In addition, the hot and humid waste gas of the present invention is not directly exhausted, and is used to circulate and dry clothes, thereby reducing the impact on the environment.

In a preferred embodiment, when the indoor air temperature is less than the first target temperature value and greater than the second target temperature value, the controller controls the second fan 6 to run, and at the same time controls the cold source to feed cooling fluid into the cold fluid flow channel; when the indoor When the air temperature is lower than the second target temperature value, the controller controls the second fan 6 to run, and at the same time controls the cooling source to stop feeding the cooling fluid into the cold fluid channel; wherein the second target temperature value is lower than the first target temperature value.

The above-mentioned first target temperature value is selected as the critical temperature of indoor air when it is not enough to meet the condensation conditions of hot and humid air, specifically 30°C; the above-mentioned second target temperature value is selected as indoor air alone is not enough to meet the condensation degree requirements, and it needs to be used in combination The critical temperature of the indoor air in the liquid cooling mode is specifically 20°C; of course, the two target temperature values are adaptively changed according to the adjustment of the actual drying parameters.

When the clothes drying device is drying, when the temperature sensor detects that the temperature of the indoor air is lower than 20°C, the controller controls the operation of the second fan 6 to introduce the indoor air into the cold fluid channel. At this time, the ambient temperature is low enough that only the indoor Air is used as the cooling medium to exchange heat with hot and humid air, which can meet the requirements of condensation degree, especially suitable for low indoor temperature in winter and early spring in unheated areas. ; When the temperature of the indoor air is between 20°C and 30°C, the controller controls the operation of the second fan 6 to introduce the indoor air into the cold fluid flow path, and at the same time controls the cooling source to feed the cooling liquid into the cold fluid flow path, at this time The ambient temperature is not low enough, and the indoor air is not enough to meet the requirements of the degree of condensation. Using indoor air and coolant as the cooling medium and exchanging heat with hot and humid air at the same time can not only meet the condensation requirements, but also reduce the amount of coolant and save energy; when the indoor air When the temperature is greater than or equal to 30°C, the controller only controls the cold source to feed the cooling liquid into the cold fluid flow channel. At this time, the ambient temperature is high, and the condensation effect of the indoor air is limited, which may also affect the cooling liquid on the hot and humid air. Condensation effect, so only the cooling liquid is used as the cooling medium to exchange heat with the hot and humid air, which improves the condensation efficiency.

The above embodiments can save energy to the greatest extent and reduce costs; the present invention can also only set the first target temperature value, and when the indoor air temperature is lower than the first target temperature value, only air cooling is used; otherwise, only liquid cooling is used.

Specifically, the cooling fluid channel includes a liquid cooling fluid channel and an air cooling fluid channel 12 , the liquid cooling fluid channel is used for cooling liquid to flow through, and the air cooling fluid channel 12 is used for indoor air to flow through. In the present application, the cooling liquid is introduced through the liquid-cooling fluid flow channel, and the indoor air is introduced through the air-cooling fluid flow channel 12. The two cooling media have separate flow channels, which facilitates the switching of cooling media. It can be understood that the above-mentioned cold fluid channel may also include only one flow channel, and when air cooling is adopted, indoor air is passed through; when liquid cooling is adopted, cooling liquid is passed through.

The cold source includes a liquid storage structure 3 that stores cooling liquid. The liquid outlet of the liquid storage structure 3 is connected to the liquid inlet 14 of the liquid cooling fluid flow channel, and the liquid return port of the liquid storage structure 3 is connected to the outlet of the liquid cooling fluid flow channel. The liquid port 15 is connected to a circulation pump that drives the cooling liquid to circulate between the liquid storage structure 3 and the liquid cooling fluid channel. It should be noted that, due to the large heat capacity of the coolant in the liquid storage structure 3, the temperature rise generated under the same heat is small, so the coolant flowing out from the liquid cooling fluid channel can cool down after entering the liquid storage structure 3 .

In order to facilitate the heat in and out of the liquid storage structure 3, the liquid outlet of the liquid storage structure 3 is arranged at the bottom of the liquid storage structure 3, and the liquid return port of the liquid storage structure 3 is arranged at the top of the liquid storage structure 3, so that The heated cooling liquid enters from the top, and the cooling liquid with a lower temperature flows out from the bottom, which ensures the cooling effect of the cooling liquid.

When the clothes drying device is drying, when the liquid cooling method is adopted, the cooling liquid in the liquid storage structure 3 is drained from the liquid outlet of the liquid storage structure 3 to the double cooling heat exchanger 1 under the action of the circulating pump. The liquid cooling fluid flow path of the heater 1. In the dual-cooling heat exchanger 1, the hot and humid air with a higher temperature is cooled by the cooling liquid with a lower temperature to reduce the temperature and humidity of the hot and humid air; The liquid outlet 15 of the liquid storage structure 3 flows out, and then flows back to the liquid storage structure 3 from the liquid return port of the liquid storage structure 3 for cooling and cooling. The liquid inlet 14 enters the liquid cooling fluid channel to realize the circulating flow of the cooling liquid and ensure the cooling effect.

The condensation dehumidifier is placed in the condensation chamber of the clothes drying device as a whole, and the condensation chamber and the drying chamber are set independently. The cooling liquid exists in the circulating closed system, and the circulating cooling utilization of the cooling liquid is realized through the liquid storage structure 3, thereby reducing the consumption of the cooling liquid. It can be understood that, in the present invention, the water supply pipe can also be used as the cooling source, and the continuously flowing water can be used as the cooling liquid.

Further, the clothes drying device also includes a semiconductor cooler 8 for cooling the cooling liquid and a third fan 10 arranged at the hot end of the semiconductor cooler 8 , and the hot end of the semiconductor cooler 8 is provided with cooling fins 9 . In order to simplify the structure, the radiating fins 9 are linear and evenly distributed over the end face of the hot end of the semiconductor refrigerator 8 .

The present invention uses the large-capacity cooling liquid in the liquid storage structure 3 to cool the heated cooling liquid, and uses the semiconductor refrigerator 8 to assist cooling of the cooling liquid, and at the same time increases the heat dissipation efficiency through the cooling fins 9, and uses the third fan 10 The surrounding air flow is disturbed to realize forced convection in the cavity, which is beneficial to the heat dissipation of the hot end of the semiconductor refrigerator 8, which can make the cooling liquid reach a lower temperature, and the cooling efficiency is higher, thereby improving the condensation efficiency of the hot and humid air, thereby improving the entire drying device. High work efficiency and fast drying.

Certainly, in the present invention, the above-mentioned semiconductor refrigerator 8 may not be provided, and the third fan 10 may blow air to the liquid storage structure 3 .

In a specific embodiment, the semiconductor refrigerator 8 is arranged between the liquid outlet of the liquid storage structure 3 and the liquid inlet 14 of the liquid-cooled fluid flow channel, and the cold end of the semiconductor refrigerator 8 is provided with a hole for cooling liquid to flow through. Heat exchange runner.

In this embodiment, the coolant flowing out of the liquid outlet of the liquid storage structure 3 first flows into the heat exchange channel of the semiconductor refrigerator 8, and the semiconductor refrigerator 8 is used to lower the temperature of the coolant again, so that the coolant can reach a lower temperature. Then flow into the liquid inlet 14 of the liquid-cooled fluid channel. In this embodiment, the semiconductor refrigerator 8 is used to cool the cooling liquid flowing into the liquid-cooling fluid channel in a targeted manner, and the cooling efficiency is high.

As shown in FIG. 4 , in order to further improve the cooling efficiency of the cooling liquid, the heat exchange channel is a serpentine coil 4 , and the serpentine coil 4 is closely attached to the cold end of the semiconductor refrigerator 8 . The liquid outlet of the liquid storage structure 3 is connected to the liquid inlet of the serpentine coil 4, and the primary cooled cooling liquid flowing out from the liquid storage structure 3 enters the serpentine coil 4 through the pipeline, and is further cooled by the semiconductor refrigerator 8, After the cooling liquid is cooled, it is diverted to the liquid-cooled fluid flow path of the double-cooled heat exchanger 1 through the pipeline connecting the liquid outlet of the serpentine coil 4 with the liquid-cooled fluid inlet 14 of the liquid-cooled fluid flow path, and reused For cooling hot and humid air.

Alternatively, the above-mentioned heat exchange channel may also be of other structures, such as an annular coil, or a hollow cooling block, as long as it can provide a cavity for the cooling liquid to flow through.

In another specific embodiment, the liquid storage structure 3 is a liquid storage tank with an opening at the top. The opening of the liquid storage tank can realize heat exchange with the outside, and improve the cooling efficiency of the cooling liquid. Certainly, the liquid storage structure 3 may also be a closed liquid storage tank, a liquid storage bucket, and the like.

In this embodiment, the semiconductor refrigerator 8 is disposed in the liquid storage tank, the third fan 10 is disposed at the opening, and the cold end of the semiconductor refrigerator 8 is in contact with the cooling liquid in the liquid storage tank. In this embodiment, the cooling end of the semiconductor refrigerator 8 is used to cool down the cooling liquid in the liquid storage tank, so as to realize indirect cooling of the cooling liquid, and also speed up the cooling efficiency of the cooling liquid.

As shown in Figure 1-2, the double-cooling heat exchanger 1 includes multi-layer heat exchange plates, and a first interval is provided between adjacent heat exchange plates to form a multi-layer hot fluid flow channel 13, and each layer of heat exchange plates Including two layers of liquid cooling plates 11 arranged in parallel, a second interval is provided between them to form an air-cooled fluid flow channel 12, and both layers of liquid cooling plates 11 are provided with cavities to form a liquid cooling fluid flow channel; wherein, The liquid outlet of the liquid storage structure 3 is connected to the flow divider 5 through a liquid supply pipe and connected to the liquid inlet 14 of all liquid cooling fluid flow channels, and the liquid outlet 15 of all liquid cooling fluid flow channels is connected to a The liquid return pipe is connected with the liquid return port of the liquid storage structure 3 .

Each layer of hot fluid flow channels 13 has oppositely arranged air inlets and air outlets, and each layer of heat exchange plate includes two layers of liquid cooling fluid flow channels arranged at intervals formed by liquid cooling plates 11 and two layers of liquid cooling fluid flow channels. Between the air-cooled fluid passages 12, each layer of liquid-cooled fluid passages has a liquid inlet 14 and a liquid outlet 15 arranged oppositely, and each layer of air-cooled fluid passages 12 has an air inlet and an air outlet oppositely arranged.

When the liquid cooling method is adopted, the cooling liquid realizes diversion and confluence respectively at the liquid inlet 14 and the liquid outlet 15 of the liquid cooling fluid flow channel, and after the cooled cooling liquid is diverted at the liquid inlet side of the liquid cooling fluid flow channel, Enter the liquid inlets 14 of the liquid-cooled fluid channels of each layer respectively, and exchange heat with the hot and humid air through the liquid-cooled plate 11. 15 After converging, the flow is led to the liquid inlet of the liquid storage structure 3 through the pipeline for cooling.

When the air-cooling method is adopted, the indoor air is introduced into the air-cooled fluid flow channel 12 by using the second air cooling, and by cooling the heat exchange plates on both sides, the side of the heat exchange plate away from the air-cooled fluid flow channel 12 is indirectly controlled. The hot and humid air is condensed, and the heated indoor air is discharged.

In the double-cooling heat exchanger 1, the multi-layer hot fluid flow channel 13 divides the hot and humid air into multiple strands, and the multi-layer cold fluid flow channel formed by the multi-layer heat exchange plate is used to disperse and cool the hot and humid air, increasing the heat and humidity of the hot and humid air. The heat exchange contact area with the cooling liquid ensures the uniformity of heat exchange and improves the condensation efficiency. It can be understood that the dual-cooling heat exchanger 1 of the present invention can also be of other structures, such as liquid-cooled heat exchange tubes and air-cooled heat exchange tubes arranged at intervals on the same layer, and there is a gap between the heat exchange tubes for hot and humid air to flow through. , or a hot fluid channel 13 is set between two adjacent layers of heat exchange tubes.

In order to facilitate processing, the two layers of liquid cooling plates 11 are all inflation plates, and the outer surface used to contact with hot and humid air is covered with ribs. The inflation plate is made of aluminum alloy, and the flow paths that communicate with each other are arranged inside to form a liquid-cooled fluid flow path to facilitate the circulation of cooling liquid. The heat exchange interface in contact with the hot and humid air is the surface of the inflatable plate, and the heat exchange efficiency is high; as shown in Figure 5, the ribs are circular, but of course they can also be in other shapes. The outer surface of the inflation plate serves as the heat exchange interface of the hot and cold fluids, and the raised ribs are beneficial to enhance the airflow disturbance, strengthen the heat exchange, and improve the condensation efficiency of the hot and humid air. Of course, the surface of the heat exchange plate can also be plane.

The outer surface of the liquid-cooled plate 11 forming the air-cooled fluid channel 12 may also be provided with fins to increase the heat exchange area of the air-cooled system and enhance heat exchange.

In order to further optimize the above-mentioned technical scheme, the cooling liquid is a mixed liquid of water, ethylene glycol, and graphene. The cooling liquid can meet the requirements of non-freezing and strong heat exchange capacity in low-temperature working conditions, and the cost is low, and the heat carrying capacity of water is strong, so that high-efficiency water condensation can be realized. The coolant can also use other liquids, such as hydrocarbon refrigerants, Freon, etc.

For the convenience of layout, the hot fluid flow direction of the hot and humid air in the hot fluid flow channel 13 is perpendicular to the cold fluid flow direction of the cooling medium in the cold fluid flow channel. As shown in Figure 3, the flow direction of hot and humid air is direction A, and the flow direction of cooling medium is direction B, and direction A and direction B are vertically arranged; at this time, the inlet and outlet pipes of cooling medium will not interfere with the inlet and outlet of hot and humid air in the hot fluid flow channel 13 , to ensure the heat transfer efficiency. It can be understood that the directions A and B can also be arranged in parallel; the flow directions of the cooling liquid as the cooling medium and the indoor air can also be the same or different.

The clothes drying device of the present invention may be a separate clothes dryer, or may be a structure on a washing machine with a drying function.

The embodiment of the present invention also discloses a washing machine, which includes a washing tub with a washing chamber, and also includes the drying device provided in any one of the above embodiments. The washing chamber forms the drying chamber of the drying device, which improves the drying efficiency. , the advantages are brought by the clothes drying device. For details, please refer to the relevant parts in the above embodiments, and details will not be repeated here.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (11)

1. A clothes drying apparatus comprising a drying chamber for placing clothes, and further comprising a condensation dehumidifier for condensing and dehumidifying hot and humid air exhausted from the drying chamber, the condensation dehumidifier comprising:

the double-cold heat exchanger (1) is provided with a hot fluid flow channel (13) and a cold fluid flow channel which are sealed and separated, the hot fluid flow channel (13) is used for wet hot air to flow through, the cold fluid flow channel is used for cooling medium to flow through, the cooling medium comprises cooling liquid and indoor air so as to enable the cooling medium to exchange heat with the wet hot air and further condense the wet hot air, an air inlet of the hot fluid flow channel (13) is communicated with an air outlet of the drying cavity, and an air outlet of the hot fluid flow channel (13) is communicated with an air return port of the drying cavity;

a first fan (7) for driving hot and humid air to the hot fluid flow path (13);

a cold source for introducing cooling liquid into the cold fluid flow channel;

a second fan (6) for driving indoor air to flow to the cold fluid flow passage;

a temperature sensor for detecting the temperature of the indoor air;

a controller connected to the temperature sensor, wherein the controller controls at least the second fan (6) to operate to flow indoor air into the cold fluid flow passage when the indoor air temperature is lower than a first target temperature value; when the indoor air temperature is not lower than the first target temperature value, the controller controls the second fan (6) to stop running and controls the cold source to introduce cooling liquid into the cold fluid flow channel;

and a heater is arranged between the air outlet of the hot fluid flow channel (13) and the air return port of the drying cavity.

2. The clothes drying device according to claim 1, wherein when the indoor air temperature is lower than the first target temperature value and higher than a second target temperature value, the controller controls the second fan (6) to operate and controls the cold source to feed cooling liquid into the cold fluid flow channel; when the indoor air temperature is lower than the second target temperature value, the controller controls the second fan (6) to operate, and controls the cold source to stop introducing cooling liquid into the cold fluid flow channel;

wherein the second target temperature value is less than the first target temperature value.

3. The clothes drying apparatus of claim 1, wherein said cold fluid flow path includes a liquid cooling fluid flow path for passing a cooling fluid therethrough and an air cooling fluid flow path (12) for passing indoor air therethrough; the cold source includes:

the liquid storage structure (3) is stored with cooling liquid, a liquid outlet of the liquid storage structure (3) is connected with a liquid inlet (14) of the liquid cooling fluid flow channel, and a liquid return port of the liquid storage structure (3) is connected with a liquid outlet (15) of the liquid cooling fluid flow channel;

and the circulating pump drives the cooling liquid to circularly flow between the liquid storage structure (3) and the liquid cooling fluid flow channel.

4. The clothes drying apparatus according to claim 3, further comprising a semiconductor refrigerator (8) for cooling the cooling liquid and a third fan (10) disposed at the hot end of the semiconductor refrigerator (8), and the hot end of the semiconductor refrigerator (8) is provided with heat dissipating fins (9).

5. Clothes drying apparatus according to claim 4, characterized in that said semiconductor refrigerator (8) is arranged between the outlet of said liquid holding structure (3) and the inlet (14) of said liquid-cooled fluid flow passage, the cold end of said semiconductor refrigerator (8) being provided with a heat exchange flow passage for the cooling liquid to flow through.

6. Clothes drying apparatus according to claim 5, characterized in that the heat exchange flow path is a serpentine (4), the serpentine (4) being in close contact with the cold end of the semiconductor refrigerator (8).

7. Clothes drying device according to claim 4, characterized in that said liquid storage structure (3) is a liquid tank with an opening at the top, said semiconductor refrigerator (8) is arranged in said liquid tank, said third fan (10) is arranged at said opening, and said cold end of said semiconductor refrigerator (8) is in contact with the cooling liquid in said liquid tank.

8. Laundry drying apparatus according to claim 3, characterized in that said double-cold heat exchanger (1) comprises a plurality of layers of heat exchanger plates, adjacent heat exchanger plates being provided with a first space therebetween to form a plurality of layers of said hot fluid flow channel (13), each of said layers of heat exchanger plates comprising two layers of liquid-cold plates (11) arranged in parallel, a second space being provided therebetween to form said air-cooled fluid flow channel (12), both layers of said liquid-cold plates (11) being provided with cavities to form said liquid-cooled fluid flow channel;

the liquid outlet of the liquid storage structure (3) is connected with the liquid inlets (14) of the liquid cooling fluid flow passages through a liquid supply pipe connecting splitter (5), and the liquid outlets (15) of the liquid cooling fluid flow passages are connected with a liquid return pipe through a confluence device (2) and connected with a liquid return port of the liquid storage structure (3).

9. Clothes drying device according to claim 8, characterized in that both layers of said liquid-cooled panels (11) are inflatable panels, and the outer surface intended to come into contact with the hot and humid air is lined with ribs.

10. The clothes drying device according to claim 1, wherein the cooling liquid is a mixed liquid of water, ethylene glycol and graphene;

the hot fluid flow direction of the wet hot air in the hot fluid flow channel (13) is vertical to the cold fluid flow direction of the cooling medium in the cold fluid flow channel.

11. A washing machine comprising a washing drum having a washing chamber, characterized in that it further comprises a drying appliance as claimed in any one of claims 1 to 10, said washing chamber forming a drying chamber of said drying appliance.

Images