Energy-saving washing machine

Abstract

The utility model discloses an energy-saving washing machine which comprises a roller, a container assembly, a heat pump assembly and a waste water heat exchange assembly. The roller is provided with a wastewater outlet; the container assembly comprises a first container and a second container, the first container is provided with a fresh water inlet, and the second container is directly or indirectly communicated with the roller; the heat pump assembly comprises a compressor, a condenser, a throttling element and an evaporator, the evaporator is arranged in the first container, and the condenser is arranged in the second container; the wastewater heat exchange assembly comprises a wastewater heat exchanger, the wastewater heat exchanger is provided with a wastewater heat exchange flow channel and a new water heat exchange flow channel which exchange heat with each other, the wastewater heat exchange flow channel is directly or indirectly communicated with the wastewater outlet, the new water heat exchange flow channel is provided with a first inlet and a first outlet, the first inlet is communicated with the first container, and the first outlet is communicated with the second container. The utility model relates to the technical field of washing machines, waste water and new water can be subjected to heat exchange, waste heat of the waste water is fully utilized, and the heating cost of hot water is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of washing machines, in particular to an energy-saving washing machine. BACKGROUND

[0002] At present, washing machines are widely used in hospitals, schools, hotels, mines and other places. The water source of washing machines on the market is usually tap water at room temperature. In order to improve the washing effect and efficiency, more and more washing machines begin to use hot water, especially commercial drum washing machines.

[0003] However, since the specific heat capacity of water is large, a lot of heat is consumed in the process of heating water. The common heat source on the market is usually steam and electricity, and the heating cost is high. The high heating cost hinders the popularization and application of hot water washing machines. On the other hand, the waste water discharged in the washing process of hot water washing machines is still high in temperature. Direct discharge of waste water not only wastes energy, but also causes thermal pollution.

[0004] How to reduce the heating cost of hot water washing machines and how to utilize waste water heat recovery are technical problems that need to be solved for hot water washing machines at present. SUMMARY

[0005] The present application aims to at least solve one of the above technical problems in the prior art to some extent. To this end, the present application provides an energy-saving washing machine which can heat exchange waste water and fresh water, fully utilize the waste water heat, and reduce the heating cost of hot water.

[0006] According to the energy-saving washing machine of the present application, the energy-saving washing machine comprises a drum, a container assembly, a heat pump assembly and a waste water heat exchange assembly. The drum is provided with a waste water outlet. The container assembly comprises a first container and a second container. The first container is provided with a fresh water inlet for fresh water to pass in. The second container is directly or indirectly communicated with the drum. The heat pump assembly comprises a compressor, a condenser, a throttling element and an evaporator which form a refrigerant cycle. The evaporator is arranged in the interior of the first container, and the condenser is arranged in the interior of the second container. The waste water heat exchange assembly comprises a waste water heat exchanger which has a waste water heat exchange flow channel and a fresh water heat exchange flow channel for heat exchange with each other. The waste water heat exchange flow channel is directly or indirectly communicated with the waste water outlet for waste water to pass in. The fresh water heat exchange flow channel has a first inlet and a first outlet. The first inlet is communicated with the first container, and the first outlet is communicated with the second container.

[0007] In an optional or preferred embodiment, the first container is communicated with the first inlet of the fresh water heat exchange flow channel through a first pipeline, and the first outlet of the fresh water heat exchange flow channel is communicated with the second container through a second pipeline.

[0008] In an optional or preferred embodiment, the second pipeline is provided with a one-way valve.

[0009] In an optional or preferred embodiment, a hot water storage tank is further provided between the second container and the drum, the second container is communicated with the hot water storage tank through a third pipeline, and the hot water storage tank is communicated with the drum through a fourth pipeline.

[0010] In an optional or preferred embodiment, the fourth pipeline is provided with a hot water valve.

[0011] In an optional or preferred embodiment, a waste water storage tank is further provided between the waste water heat exchanger and the drum, the waste water outlet is communicated with the waste water storage tank through a fifth pipeline, the waste water heat exchange channel has a second inlet and a second outlet, the waste water storage tank is communicated with the second inlet through a sixth pipeline, and the second outlet is a waste water discharge outlet.

[0012] In an optional or preferred embodiment, the fifth pipeline is provided with a waste water discharge valve, and the sixth pipeline is provided with a waste water pump.

[0013] In an optional or preferred embodiment, the first outlet of the waste water heat exchange channel is provided with a seventh pipeline communicated with the first container.

[0014] In an optional or preferred embodiment, one end of the seventh pipeline is connected to the first container, and the other end is connected to the second pipeline.

[0015] In an optional or preferred embodiment, the seventh pipeline is provided with a circulating pump.

[0016] Based on the above technical solution, the embodiments of the present application have at least the following beneficial effects: the above technical solution designs a waste water heat exchanger, the waste water heat exchange channel of the primary side flows through waste water, the fresh water heat exchange channel of the secondary side flows through fresh water, the waste water and the fresh water exchange heat in the waste water heat exchanger, and the waste water discharged by the drum can be recycled. In addition, the waste heat recovery mode adopts a heat exchange enhancement technology, specifically, a heat pump technology is used to increase the temperature difference between the fresh water and the waste water, the evaporator in the heat pump assembly absorbs the heat of the fresh water, and the fresh water after heat exchange with the waste water is heated through the condenser to further increase the temperature. In this way, not only the heat exchange amount and the waste heat utilization rate are increased, and the heat exchange speed is improved, but also the direct contact between the waste water and the evaporator is avoided, and the corrosion and blockage of the evaporator are prevented, and the equipment operation stability is improved. The present application can absorb the heat of the waste water discharged by the washing machine, heat the fresh water to a set temperature, and be reused in the washing process of the washing machine. BRIEF DESCRIPTION OF DRAWINGS

[0017] The present application will be further described below in conjunction with the drawings and embodiments;

[0018] Figure 1is a structural schematic diagram of embodiment one of the present application.

[0019] Figure 2 is a structural schematic diagram of embodiment two of the present application.

[0020] Reference signs: drum 11;

[0021] Compressor 21, condenser 22, throttling element 23, evaporator 24;

[0022] First container 31, second container 32, hot water storage tank 33, waste water storage tank 34;

[0023] Waste water heat exchanger 41;

[0024] First pipeline 51, second pipeline 52, third pipeline 53, fourth pipeline 54, fifth pipeline 55, sixth pipeline 56, seventh pipeline 57, fresh water injection pipe 58, waste water discharge pipe 59;

[0025] Check valve 61, hot water valve 62, waste water drain valve 63, waste water pump 64, circulating pump 65, fresh water valve 66. DETAILED DESCRIPTION

[0026] In order to make the above objectives, features and advantages of the present application more apparent and easy to understand, the specific embodiments of the present application are described in detail below. In the following description, a large number of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, therefore the present application is not limited to the specific embodiments disclosed below.

[0027] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0028] In addition, the terms "first", "second", etc. are used herein only to describe different instances, and are not used to denote or imply relative importance or a number of indications of the technical features indicated. Thus, the technical features defined with "first", "second", etc. can explicitly or implicitly include at least one of the technical features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0029] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0030] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0031] It should be noted that when an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for illustrative purposes, and do not represent the only embodiment.

[0032] Embodiment one

[0033] The following refers to Figure 1 The present embodiment describes an energy-saving washing machine, which includes a drum 11, a container assembly, a heat pump assembly and a waste water heat exchange assembly.

[0034] The drum 11 is provided with a waste water outlet for discharging the waste water after washing.

[0035] The container assembly comprises a first container 31 and a second container 32; the heat pump assembly comprises a compressor 21, a condenser 22, a throttling element 23 and an evaporator 24 forming a refrigerant cycle, the evaporator 24 being arranged inside the first container 31 and the condenser 22 being arranged inside the second container 32.

[0036] The waste water heat exchange assembly comprises a waste water heat exchanger 41 having a waste water heat exchange flow channel and a fresh water heat exchange flow channel which exchange heat with each other. The fresh water heat exchange flow channel has a first inlet and a first outlet, and the waste water heat exchange flow channel has a second inlet and a second outlet.

[0037] As shown in the figure, the first container 31 is provided with a fresh water inlet for the fresh water to pass through, in particular, the fresh water inlet is connected with a fresh water injection pipe 58, and the fresh water injection pipe 58 is provided with a fresh water valve 66. Figure 1

[0038] The first inlet of the fresh water heat exchange flow channel is communicated with the first container 31, in particular, the first container 31 is communicated with the first inlet of the fresh water heat exchange flow channel through a first pipe 51. The first outlet of the fresh water heat exchange flow channel is communicated with the second container 32. In particular, the first outlet of the fresh water heat exchange flow channel is communicated with the second container 32 through a second pipe 52, wherein the second pipe 52 is provided with a one-way valve 61.

[0039] The waste water heat exchange flow channel is directly or indirectly communicated with a waste water outlet for the waste water to pass through. In this embodiment, a waste water storage tank 34 is further arranged between the waste water heat exchanger 41 and the drum 11, that is to say, the waste water heat exchange flow channel is indirectly communicated with the waste water outlet, and the waste water storage tank 34 is arranged at the bottom of the drum and used for storing the waste water discharged after washing clothes. In particular, the waste water outlet is communicated with the waste water storage tank 34 through a fifth pipe 55; the waste water storage tank 34 is communicated with the second inlet of the waste water heat exchange flow channel through a sixth pipe 56, and the second outlet of the waste water heat exchange flow channel is a waste water discharge outlet connected with a waste water discharge pipe 59. Wherein, the fifth pipe 55 is provided with a waste water drain valve 63, and the sixth pipe 56 is provided with a waste water pump 64.

[0040] The second container 32 is directly or indirectly communicated with the drum 11. In this embodiment, a hot water storage tank 33 is further arranged between the second container 32 and the drum 11, that is to say, the second container 32 is indirectly communicated with the drum 11. The second container 32 is communicated with the hot water storage tank 33 through a third pipe 53, and the hot water storage tank 33 is communicated with the drum 11 through a fourth pipe 54. Wherein, the fourth pipe 54 is provided with a hot water valve 62.

[0041] ​The above technical solution, the wastewater in the drum flows to the wastewater storage tank 34 through the fifth pipeline 55 from the wastewater of the drum, and then flows to the wastewater heat exchange flow channel of the wastewater heat exchanger 41. The fresh water flows into the first container 31 from the fresh water injection pipe 58, the evaporator 24 absorbs the heat of the fresh water, and the fresh water is cooled and then flows to the fresh water heat exchange flow channel of the wastewater heat exchanger 41. The temperature difference between the fresh water and the wastewater after the heat of the fresh water is absorbed by the evaporator 24 is increased, the heat exchange capacity of the wastewater heat exchanger 41 is improved, and the fresh water can absorb more heat of the wastewater. After the fresh water absorbs the heat of the wastewater, the fresh water flows into the second container 32 through the second pipeline 52, and the condenser 22 heats the fresh water in the second container 32 to further heat the fresh water to hot water. The hot water after being heated is stored in the hot water storage tank 33 and is used by the washing machine at any time.

[0042] It can be understood that the wastewater heat exchanger 41 in the embodiment exchanges heat between the wastewater and the fresh water, and the wastewater and the fresh water exchange heat in the wastewater heat exchanger, so that the waste heat of the wastewater discharged from the drum can be recovered. Specifically, the wastewater heat exchanger 41 is a partition heat exchanger, and the fresh water and the wastewater are in countercurrent heat exchange through the partition, so that the heat exchange efficiency is high.

[0043] The energy-saving washing machine of the embodiment adopts the enhanced heat exchange technology, and uses the heat pump technology to increase the temperature difference between the fresh water and the wastewater. Specifically, the evaporator 24 in the heat pump assembly absorbs the heat of the fresh water, and then the condenser 22 heats the fresh water after heat exchange with the wastewater, so that the fresh water is further heated. The enhanced heat exchange technology uses the evaporator of the heat pump assembly to absorb the heat of the fresh water to cool the fresh water, and uses the condenser of the heat pump assembly to heat the fresh water after heat exchange with the wastewater, so that the fresh water is further heated to hot water. On the one hand, the temperature difference between the fresh water and the wastewater is increased, and the heat exchange capacity of the wastewater heat exchanger is significantly improved, so that the fresh water can absorb more heat of the wastewater. On the other hand, the waste heat of the wastewater is recovered in an indirect way without flowing through the evaporator of the heat pump assembly, so that the fresh water and the evaporator are not in direct contact, and the corrosion and blockage of the evaporator are prevented, and the running stability of the equipment is improved.

[0044] In this way, the waste heat is transferred from the wastewater to the fresh water; the fresh water is heated to become hot water, and the hot water becomes wastewater after being used, and the waste heat in the wastewater is used again to heat the fresh water. In this way, the heat is recycled, so that the purposes of energy saving and emission reduction are achieved.

[0045] Embodiment two

[0046] Reference Figure 2 The embodiment is different from the first embodiment in that the first outlet of the wastewater heat exchange flow channel is provided with the seventh pipeline 57 communicating with the first container 31, one end of the seventh pipeline 57 is connected to the first container 31, and the other end is connected to the second pipeline 52. The seventh pipeline 57 is provided with a circulating pump 65.

[0047] It can be understood that the circulating pump 65 drives the fresh water circulating flow between the first container 31 and the fresh water and waste water heat exchanger 41, that is, the fresh water flows from the first container 31 to the fresh water heat exchange channel of the waste water heat exchanger 41 through the first pipeline 51, and then flows to the first container 31 through the seventh pipeline 57, so that the fresh water can circulate through the waste water heat exchanger to absorb the waste heat of the waste water to heat the fresh water in the first container 31.

[0048] The embodiment has wide application range, for example, when the fresh water temperature is low or the waste water amount is large, the circulating pump 65 can be started to heat the fresh water in the first container 31 by using the waste heat of the waste water, thereby increasing the waste water utilization rate and improving the operation efficiency of the heat pump assembly. It can still be applied in the environment with low fresh water temperature. It should be noted that the fresh water refers to tap water or washing water newly injected into the drum.

[0049] The energy-saving washing machine of the above two embodiments integrates the waste water heat exchanger and the heat pump assembly with the drum, and is installed inside the shell of the washing machine, thereby reducing the equipment cost and the floor area. The waste water discharged at normal temperature or low temperature after waste heat utilization also reduces thermal pollution, which is conducive to waste water treatment and environmental protection.

[0050] The embodiments of the application are described in detail above in combination with the drawings, but the application is not limited to the above embodiments, and various changes can be made within the knowledge range of ordinary skilled persons in the art without departing from the purpose of the application.

Claims

1. An energy saving type washing machine, characterized by, The application relates to a heat pump washing machine. The application comprises: a drum provided with a wastewater outlet; a container assembly comprising a first container provided with a fresh water inlet for fresh water to pass in and a second container directly or indirectly communicated with the drum; a heat pump assembly comprising a compressor, a condenser, a throttling element and an evaporator forming a refrigerant cycle, the evaporator being arranged inside the first container and the condenser being arranged inside the second container; a wastewater heat exchange assembly comprising a wastewater heat exchanger having a wastewater heat exchange flow channel and a fresh water heat exchange flow channel for heat exchange with each other, the wastewater heat exchange flow channel being directly or indirectly communicated with the wastewater outlet for wastewater to pass in, the fresh water heat exchange flow channel having a first inlet communicated with the first container and a first outlet communicated with the second container.

2. The energy saving washing machine according to claim 1, characterized in that: The first container is communicated with the first inlet of the fresh water heat exchange flow channel through a first pipeline, and the first outlet of the fresh water heat exchange flow channel is communicated with the second container through a second pipeline.

3. The energy saving washing machine according to claim 2, characterized in that: The second pipeline is provided with a one-way valve.

4. The energy saving washing machine according to claim 2, characterized in that: A hot water storage tank is further arranged between the second container and the drum, the second container is communicated with the hot water storage tank through a third pipeline, and the hot water storage tank is communicated with the drum through a fourth pipeline.

5. The energy saving washing machine according to claim 4, characterized in that: The fourth pipeline is provided with a hot water valve.

6. The energy saving washing machine according to claim 2, characterized in that: A wastewater storage tank is further arranged between the wastewater heat exchanger and the drum, the wastewater outlet is communicated with the wastewater storage tank through a fifth pipeline, the wastewater heat exchange flow channel has a second inlet and a second outlet, the wastewater storage tank is communicated with the second inlet through a sixth pipeline, and the second outlet is a wastewater discharge port.

7. The energy saving washing machine according to claim 6, characterized in that: The fifth pipeline is provided with a wastewater discharge valve, and the sixth pipeline is provided with a wastewater pump.

8. The energy saving washing machine according to any one of claims 2 to 7, characterized in that: The first outlet of the wastewater heat exchange flow channel is provided with a seventh pipeline communicated with the first container.

9. The energy saving washing machine according to claim 8, characterized in that: One end of the seventh pipeline is connected to the first container, and the other end is connected to the second pipeline.

10. The energy saving washing machine according to claim 8, characterized in that: The seventh pipeline is provided with a circulating pump.

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