Heat recovery drying system and washing and drying equipment

Abstract

The utility model relates to the technical field of drying equipment, in particular to a heat recovery drying system and washing and drying equipment, and aims to solve the problems of insufficient heat utilization and poor user experience in a drying system in the prior art. In order to achieve the purpose, the heat recovery drying system comprises a drying unit, a dehumidification unit and a rewarming unit which are sequentially communicated to form a circulating closed loop, the drying system further comprises a heat exchange unit, the heat exchange unit is provided with a first channel and a second channel, the drying unit is communicated with the dehumidification unit through the first channel, and the dehumidification unit is communicated with the rewarming unit through the second channel. The dehumidification unit communicates with the rewarming unit through the second channel, and the first channel and the second channel are adjacent to each other to achieve heat exchange. By means of the scheme, heat of wet and hot air from the drying unit is effectively utilized, the drying efficiency is improved, and therefore energy consumption is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to drying equipment technical field, concretely provides a kind of heat recovery drying system and washing and drying equipment. BACKGROUND

[0002] Washing and drying integrated machine is a kind of household appliance equipment with washing and drying function, is widely used in family and commercial place.Cold condensing drying is through heating air, the water in clothes evaporates, then water vapor is condensed into water by condenser, to realize the drying of clothes, and condensing drying has advantage in cost.

[0003] With the development of technology, people pay more attention to the energy efficiency of products, based on this, the heat management of drying system in washing and drying integrated machine needs further upgrade, to use heat as efficiently as possible, improve the utilization rate of heat energy, reduce energy consumption.

[0004] Correspondingly, a new heat recovery drying system and washing and drying equipment are needed to solve the above problems in the art. SUMMARY

[0005] The utility model aims at solving the above-mentioned technical problem, that is, solving the problem of insufficient heat utilization in the drying system of the prior art and poor user experience.

[0006] In a first aspect, the utility model provides a kind of heat recovery drying system, the heat recovery drying system includes drying unit, dehumidification unit, re-warming unit in sequence and is communicated to form circulation closed loop, the drying system further includes heat exchange unit, the heat exchange unit has first passageway and second passageway, the drying unit and the dehumidification unit are communicated by the first passageway, the dehumidification unit and the re-warming unit are communicated by the second passageway, the first passageway and the second passageway are adjacent to realize heat exchange.

[0007] In the specific embodiment with the above heat recovery drying system, the first passageway has first inlet and first outlet, the second passageway has second inlet and second outlet, the first inlet and the second outlet are located on one side, and the first outlet and the second inlet are located on one side.

[0008] In the specific embodiment with the above heat recovery drying system, the first passageway and the second passageway are staggered.

[0009] In the specific embodiment with the above heat recovery drying system, the first passageway and the second passageway are both set as folding passageway.

[0010] In the specific implementation of the heat recovery drying system, the dehumidifying unit comprises a condenser and a temperature reducing assembly, one end of the condenser is communicated with the first outlet, the other end of the condenser is communicated with the second inlet, and the temperature reducing assembly is arranged on one side of the condenser and used for reducing the temperature of the condenser.

[0011] In the specific implementation of the heat recovery drying system, the temperature reducing assembly comprises a plurality of spray heads, and the spray direction of the spray heads is towards the condenser.

[0012] Alternatively,

[0013] The temperature reducing assembly comprises a condensing fan, and the air outlet direction of the condensing fan is towards the condenser.

[0014] In the specific implementation of the heat recovery drying system, the drying system further comprises a circulating fan, and the circulating fan, the drying unit, the dehumidifying unit, the rewarming unit and the heat exchange unit form a circulating system.

[0015] In the specific implementation of the heat recovery drying system, the circulating fan is arranged between the dehumidifying unit and the heat exchange unit.

[0016] In the specific implementation of the heat recovery drying system, the rewarming unit comprises a heating cavity and a temperature increasing assembly, one end of the heating cavity is communicated with the second outlet, and the other end of the heating cavity is communicated with the drying unit.

[0017] A washing and drying device comprises the heat recovery drying system in any one of the above solutions.

[0018] In the technical solution, the heat recovery drying system is disclosed, and the circulating system thereof is a closed loop circulating system composed of a drying unit, a dehumidifying unit and a rewarming unit. The drying wet hot air discharged from the drying unit becomes wet cold air through the dehumidifying unit, and the wet cold air becomes dry hot air through the rewarming unit, and then enters the drying unit again to dry the articles to be dried. The wet hot air discharged from the drying unit enters the first channel of the heat exchange unit, and the wet cold air discharged from the dehumidifying unit passes through the second channel of the heat exchange unit. The gases in the first channel and the second channel are heat exchanged, the gas entering the rewarming unit is preheated, heat recovery is realized, the heat of the wet hot air discharged from the drying unit is effectively utilized, the drying efficiency is improved, and the energy consumption is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] The preferred embodiments of the utility model are described below with reference to the drawings, and the drawings show:

[0020] Fig. 1 is the system structure arrangement drawing of one embodiment of the utility model, and

[0021] Fig. 2 is the system structure arrangement drawing of another embodiment of the utility model.

[0022] 1, drying unit, 2, dehumidification unit, 3, re-warming unit, 4, heat exchange unit, 5, first passageway, 6, second passageway, 7, first inlet, 8, first outlet, 9, second inlet, 10, second outlet, 11, condenser, 12, cooling assembly, 13, circulating fan, 14, heating cavity, 15, temperature-rising assembly. DETAILED DESCRIPTION

[0023] The preferred embodiments of the utility model are described below with reference to the drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the utility model, and are not used to limit the protection scope of the utility model. Those skilled in the art can make adjustments according to the needs in order to adapt to specific application occasions. For example, although the description is combined with the washing machine, this is not restrictive, and those skilled in the art can apply the utility model to any other drying device according to the needs, as long as the drying device needs to circulate the drying gas.

[0024] It should be noted that in the description of the utility model, the terms "upper", "lower", "left", "right", "inner", "outer" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and is not indicative or suggestive of the related devices or elements having a specific orientation, being constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, ordinal numbers "first", "second" and the like are only for descriptive purposes and cannot be understood as indicative or suggestive of relative importance.

[0025] In addition, it should be noted that in the description of the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection" should be understood broadly, for example, it can be fixed connection, can also be detachable connection or integral connection, can be mechanical connection, can also be electrical connection, can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0026] Furthermore, in order to more clearly show the core technical scheme of the utility model, the description below omits the description of the known structure of the washing machine, but this omission is only for the convenience of description and does not mean that the washing machine can not have these structures.

[0027] As Figs. 1-2 shown, the utility model provides a kind of heat recovery drying system, including drying unit 1, dehumidification unit 2, reheat unit 3 in turn intercommunication and form circulation closed loop, drying system also includes heat exchange unit 4, heat exchange unit 4 has first passage 5 and second passage 6, drying unit 1 and dehumidification unit 2 are communicated by first passage 5, dehumidification unit 2 and reheat unit 3 are communicated by second passage 6, first passage 5 and second passage 6 are adjacent to realize heat exchange.

[0028] In the embodiment, the heat recovery drying system is combined with the washing machine to explain the principle and structure. In the drying system of the washing machine, the drying unit 1 is the inner drum of the washing machine. The washed clothes are placed in the inner drum. The inner drum has an outlet for drying gas. The outlet is connected to the first passage 5 of the heat exchange unit 4 through a pipeline. Then, the first passage 5 of the heat exchange unit 4 is connected to the dehumidification unit 2. The dehumidification unit 2 cools and dehumidifies the hot and humid drying gas discharged from the inner drum. Then, the dehumidified drying gas is discharged to the second passage 6 of the heat exchange unit 4. At this time, the drying gas in the second passage 6 is relatively cool and dry. The hot and humid air in the first passage 5 is discharged from the inner drum. The first passage 5 and the second passage 6 are adjacent to realize heat exchange. The hot and humid air in the first passage 5 preheats the cool and dry air in the second passage 6. This realizes waste heat recovery, improves the utilization rate of heat, reduces energy consumption, and improves user experience.

[0029] It should be noted that although the washing machine is used as a carrier to elaborate the heat recovery drying system in the above specific embodiments, this does not mean that the application range of the system is limited to this. In fact, the design concept and technical advantages of the heat recovery drying system can be widely applied to other household appliances with drying functions. For example, we can imagine applying it to a dishwasher. By skillfully modifying and optimizing the system arrangement, the dishwasher can quickly and efficiently dry dishes after cleaning them using the heat recovery drying system.

[0030] On the basis of the above embodiment, the first passage 5 has a first inlet 7 and a first outlet 8, and the second passage 6 has a second inlet 9 and a second outlet 10. The first inlet 7 and the second outlet 10 are located on one side, and the first outlet 8 and the second inlet 9 are located on the other side. The inlet and outlet of the first passage 5 and the second passage 6 are mainly used to make the flow direction of the drying gas in the first passage 5 and the second passage 6 opposite, thereby improving the heat exchange efficiency.

[0031] On the basis of the above-mentioned embodiments, the first channel 5 and the second channel 6 are staggered, which can be understood as follows: in order to improve the heat exchange efficiency between the first channel 5 and the second channel 6, and to increase the contact heat exchange area between the first pipeline and the second pipeline, the first pipeline and the second pipeline can be arranged to increase the heat exchange area. Any staggered arrangement that can increase the heat exchange area is acceptable.

[0032] In exploring the implementation of improving the heat exchange efficiency, an innovative design idea is to construct the first channel 5 and the second channel 6 into a folded channel structure. This design ingeniously utilizes the principle of space folding, so that the originally linear channel is transformed into a multi-segment connected folded path. Specifically, the folded first channel 5 and the second channel 6 are arranged in a staggered manner. This layout not only effectively saves the space inside the equipment, but also significantly increases the flow path length of the heat exchange medium in the channel, thereby greatly increasing the heat exchange area. Such design optimization directly promotes the heat transfer efficiency in the heat exchange process, so that heat can be more fully absorbed or released. Of course, it should be clear that the use of a folded channel structure is only one of many embodiments to achieve the goal of increasing the heat exchange area. In actual application, according to the specific heat exchange requirements, space limitations, and cost considerations, other innovative structures can also be explored. For example, a coil type structure is another effective solution widely used.

[0033] In this embodiment, the dehumidification unit 2 cools and dehumidifies the drying gas discharged from the first channel 5, mainly condensing and discharging the large amount of water vapor carried in the drying gas. Specifically, the hot and humid drying gas discharged from the first channel 5 passes through the condenser 11, and a cooling assembly 12 is arranged beside the condenser 11 to cool the condenser 11, thereby condensing the water vapor inside and removing part of the water.

[0034] In the conceivable implementation, cooling and temperature reduction can be achieved by providing multiple spray heads, and the condenser 11 can also be cooled by a condensing fan. The specific cooling method can be selected flexibly according to the actual installation situation.

[0035] On the basis of the above-mentioned embodiments, a circulating fan 13 is also arranged in the closed-loop circulating drying system. The circulating fan 13 can be selected at a reasonable position in the circulating system, which is not restrictive. In a possible implementation, the circulating fan 13 is arranged between the dehumidification unit 2 and the heat exchange unit 4, i.e., between the outlet of the dehumidification unit 2 and the inlet of the second channel 6. The drying gas at this position has a low temperature and a relatively small humidity, and the circulating fan 13 can be continuously operated.

[0036] On the basis of the above-mentioned embodiments, the rewarming unit 3 adopts the combination of the heating cavity 14 and the temperature raising assembly 15, the drying gas discharged by the heat exchange unit 4 enters the heating cavity 14, and then the drying gas is raised in temperature by the temperature raising assembly 15, the temperature raising assembly 15 can be an electric heating wire, the temperature raising speed is fast, and the heat utilization rate is high.

[0037] The utility model discloses still a kind of washing and drying equipment, the washing and drying equipment can utilize heat recovery drying system in above-mentioned embodiment to improve heat utilization rate, improve equipment energy efficiency, the drying equipment can be washing machine also can be dish washer, this is not restrictive.

[0038] So far, the technical scheme of the utility model has been described in combination with the preferred embodiments shown in the drawings, but it is easy for those skilled in the art to understand that the protection scope of the utility model is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to related technical features without deviating from the principles of the utility model, and the technical schemes after these changes or replacements will all fall within the protection scope of the utility model.

Claims

1. A heat recovery drying system characterized by, The drying system comprises a drying unit (1), a dehumidifying unit (2) and a rewarming unit (3) which are sequentially communicated to form a circulating closed loop, and further comprises a heat exchange unit (4), the heat exchange unit (4) has a first channel (5) and a second channel (6), the drying unit (1) and the dehumidifying unit (2) are communicated by means of the first channel (5), the dehumidifying unit (2) and the rewarming unit (3) are communicated by means of the second channel (6), and the first channel (5) and the second channel (6) are adjacent to realize heat exchange.

2. The heat recovery drying system of claim 1, wherein, The first channel (5) has a first inlet (7) and a first outlet (8), the second channel (6) has a second inlet (9) and a second outlet (10), the first inlet (7) and the second outlet (10) are located on one side, and the first outlet (8) and the second inlet (9) are located on one side.

3. The heat recovery drying system of claim 2, wherein, The first channel (5) and the second channel (6) are staggered.

4. The heat recovery drying system of claim 3, wherein, The first channel (5) and the second channel (6) are both arranged as folded channels.

5. The heat recovery drying system of claim 2, wherein, The dehumidifying unit (2) comprises a condenser (11) and a cooling assembly (12), one end of the condenser (11) is communicated with the first outlet (8), the other end of the condenser (11) is communicated with the second inlet (9), and the cooling assembly (12) is arranged on one side of the condenser (11) and used for lowering the temperature of the condenser (11).

6. The heat recovery drying system of claim 5, wherein, The cooling assembly (12) comprises a plurality of spray heads, and the spray direction of the spray heads is towards the condenser (11). Alternatively, The cooling assembly (12) comprises a condenser fan, and the air outlet direction of the condenser fan is towards the condenser (11).

7. The heat recovery drying system of claim 1, wherein, The drying system further comprises a circulating fan (13), and the circulating fan (13), the drying unit (1), the dehumidifying unit (2), the rewarming unit (3) and the heat exchange unit (4) form a circulating system.

8. The heat recovery drying system of claim 7, wherein, The circulating fan (13) is arranged between the dehumidifying unit (2) and the heat exchange unit (4).

9. The heat recovery drying system of claim 2, wherein, The rewarming unit (3) comprises a heating cavity (14) and a heating assembly (15), one end of the heating cavity (14) is communicated with the second outlet (10), and the other end of the heating cavity (14) is communicated with the drying unit (1).

10. A laundry and drying appliance, characterized in that, The washing and drying equipment comprises the heat recovery drying system according to any one of claims 1 to 9.

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