CN218738848U

CN218738848U - Dish washing machine

Info

Publication number: CN218738848U
Application number: CN202222228294.6U
Authority: CN
Inventors: 刘闪闪; 王振; 李瑞嵩
Original assignee: Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
Current assignee: Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
Priority date: 2022-08-23
Filing date: 2022-08-23
Publication date: 2023-03-28
Anticipated expiration: 2032-08-23

Abstract

The embodiment of the application discloses a dish washing machine, which comprises a water tank, a heat exchanger and a washing unit, wherein the water tank is provided with a water storage cavity, a first heat exchange water inlet interface and a first heat exchange water outlet interface; the water storage cavity and the washing cavity are connected through a water supply pipeline; the first heat exchange water inlet connector and the first heat exchange water outlet connector are connected through a new water pipeline, the second heat exchange water inlet connector and the second heat exchange water outlet connector are connected through a hot water pipeline, hot waste water flowing through the hot water heat exchange pipe section and new water flowing through the new water heat exchange pipe section exchange heat in the heat exchanger, and therefore the temperature of the new water is increased. The heat exchange between the hot waste water and the fresh water raises the temperature of the fresh water, realizes the recycling of the heat of the hot waste water, and saves the energy consumption.

Description

Dish washing machine

Technical Field

The utility model relates to a washing equipment field, concretely relates to dish washer.

Background

The dish washer is an intelligent product for replacing manual tableware cleaning, and during the working process, the dish washer can continuously cover and spray the tableware for washing so as to achieve the purpose of cleaning the tableware. In order to shorten the washing time of the dishwasher, the dishwasher in the related art generally heats the washing water, increases the water temperature of the washing water, and brings heat to the tableware while the high-temperature washing water washes away the pollutants on the tableware, so that the dishwasher can obtain higher cleaning rate and drying rate in shorter washing time, and after washing is completed, the washing wastewater needs to be discharged, thereby causing greater energy consumption waste.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a dish washer which can save energy consumption.

In order to achieve the above object, an embodiment of the present invention provides a dishwasher having a heat exchange process, the dishwasher including,

the water tank is provided with a water storage cavity, a first heat exchange water inlet interface and a first heat exchange water outlet interface which are communicated with the water storage cavity;

the heat exchanger is positioned outside the water tank and is provided with a heat exchange cavity;

the washing unit is provided with a washing cavity, and a second heat exchange water inlet interface and a second heat exchange water outlet interface which are communicated with the washing cavity;

the water supply pipeline is connected with the water storage cavity and the washing cavity;

the new water pipeline is connected with the first heat exchange water inlet interface and the first heat exchange water outlet interface and is provided with a new water heat exchange pipe section positioned in the heat exchange cavity;

the first water pump is arranged on the new water pipeline;

the hot water pipeline is connected with the second heat exchange water inlet interface and the second heat exchange water outlet interface and is provided with a hot water heat exchange pipe section positioned in the heat exchange cavity;

the second water pump is arranged on the hot water pipeline; and a process for the preparation of a coating,

in the heat exchange process, the hot waste water flowing through the hot water heat exchange pipe section exchanges heat with the fresh water flowing through the fresh water heat exchange pipe section, so that the temperature of the fresh water is increased.

The heat exchange between the hot waste water and the fresh water raises the temperature of the fresh water, realizes the recycling of the heat of the hot waste water, and saves the energy consumption.

In one embodiment, the dishwasher further comprises an on-off controller, the washing unit further comprises a conveying pipeline and one or more spray arms, and the conveying pipeline is connected with the washing cavity and the spray arms; the on-off of the new water pipeline, the hot water pipeline and the conveying pipeline are controlled by the on-off controller.

Each pipeline is controlled by an on-off controller to be on and off, so that the switching control of heat exchange and washing can be realized.

In one embodiment, the dishwasher further comprises a shunt valve, wherein the shunt valve is arranged on the conveying pipeline; the on-off controller comprises a first stop valve and a second stop valve, the first stop valve is arranged on the new water pipeline, and the second stop valve is arranged on the hot water pipeline; and in the heat exchange process, the first water pump and the second water pump are opened, the first stop valve and the second stop valve are both opened, and the shunt valve is closed.

The on-off control of the new water pipeline and the hot water pipeline is realized through the first stop valve and the second stop valve, so that the switching control of heat exchange and washing can be realized.

In one embodiment, the delivery line and the hot water line have a common pipe section; the on-off controller comprises a first stop valve and a shunt valve, the first stop valve is arranged on the new water pipeline, and the shunt valve is arranged on the common pipe section; and in the heat exchange process, the first water pump and the second water pump are both opened, the first stop valve is opened, and the shunt valve enables the hot water pipeline to be conducted and the conveying pipeline to be disconnected.

The switching control of the heat exchange and the washing is realized by controlling the first stop valve to be opened and the water distribution valve to be disconnected during the heat exchange and controlling the first stop valve to be closed and the water distribution valve to be opened during the washing.

In one embodiment, the on-off controller comprises a first stop valve and a shunt valve, wherein the first stop valve is arranged on the new water pipeline; the heat exchanger is provided with a first hot water interface and a second hot water interface, and the hot water heat exchange pipe section is connected with the first hot water interface and the second hot water interface; the shunt valve is provided with a first interface, a second interface, a third interface and a fourth interface, the first interface is communicated with the second heat exchange water outlet interface, the second interface is communicated with the spray arm, the third interface is communicated with the first hot water interface, and the fourth interface is communicated with the second hot water interface; and in the heat exchange process, the first interface is communicated with the third interface, and the second interface is communicated with the fourth interface.

The first port is communicated with the third port, and the second port is communicated with the fourth port by controlling the first port and the third port to be communicated and the second port and the fourth port to be communicated during heat exchange; when washing, the first interface is controlled to be communicated with the second interface, so that the switching control of heat exchange and washing is realized; meanwhile, the distribution control of the nozzles can be realized by the shunt valve.

In the technical scheme of the utility model, the temperature of the fresh water is raised by carrying out heat exchange between the hot waste water and the fresh water, thereby realizing the recycling of the heat of the hot waste water and saving the energy consumption; the first water pump and the second water pump are arranged, so that the circulating flow speed of the liquid can be increased, and the heat exchange efficiency is improved; because the heat exchanger is located the outside of water tank, do not occupy the inner space of water tank to can effectively improve the effective volume that is used for storing new water of water tank.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a dishwasher provided in an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a dishwasher according to another embodiment of the present application;

FIG. 3 is a schematic structural diagram of a dishwasher according to another embodiment of the present application;

FIG. 4 is a schematic structural diagram of a heat exchanger of a dishwasher according to an embodiment of the present application;

FIG. 5 is a block flow diagram illustrating a heat exchange process of a dishwasher according to an embodiment of the present invention.

The reference numbers illustrate:

the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the application, as detailed in the appended claims.

As shown in fig. 1 to 4, a dishwasher 100 according to an embodiment of the present invention includes a water tank 10, a heat exchanger 12, and a washing unit 14. The sump 10 defines a reservoir chamber 101 having a certain volume, and the reservoir chamber 101 can store fresh washing water. The washing unit 14 defines a washing chamber 140 having a volume, and a support member may be disposed in the washing chamber 140, and the support member can be used for supporting tableware, which can be washed clean in the washing chamber 140. The heat exchanger 12 defines a heat exchange chamber 121 having a certain volume, and the fresh water having a lower temperature and the hot water having a higher temperature can exchange heat in the heat exchange chamber 121 to increase the temperature of the fresh water.

Referring to fig. 1, the dishwasher 100 further includes a new water pipeline 18, the water tank 10 has a first heat exchange water inlet 103 and a first heat exchange water outlet 102, the first heat exchange water inlet 103 and the first heat exchange water outlet 102 are both communicated with the water storage cavity 101, two ends of the new water pipeline 18 are respectively communicated with the first heat exchange water inlet 103 and the first heat exchange water outlet 102, the new water pipeline 18 is provided with a first water pump 20, under the action of the first water pump 20, the new water in the water storage cavity 101 flows into the new water pipeline 18 and flows back to the water storage cavity 101 again through the new water pipeline 18, and the new water circulates and flows back.

Referring to fig. 2, the dishwasher 100 further includes a hot water pipeline 22, the washing unit 14 has a second heat exchange water inlet 142 and a second heat exchange water outlet 141, the second heat exchange water inlet 142 and the second heat exchange water outlet 141 are both communicated with the washing chamber 140, two ends of the hot water pipeline 22 are respectively communicated with the second heat exchange water inlet 142 and the second heat exchange water outlet 141, the hot water pipeline 22 is provided with a second water pump 24, under the action of the second water pump 24, hot water in the washing chamber 140 flows into the hot water pipeline 22 through the second heat exchange water outlet 141, and flows into the washing chamber 140 again through the hot water pipeline 22 and the second heat exchange water inlet 142, so that the hot water circulates and flows back and forth.

Referring to fig. 4, the fresh water pipeline 18 has a fresh water heat exchange tube section 181 located inside the heat exchange cavity 121. The hot water pipe 22 has a hot water heat exchange tube section 221 inside the heat exchange chamber 121. The fresh water is typically warm water at ambient temperature, which is at a lower temperature. The hot water is usually washing waste water, and its temperature is high. When heat recovery is required, that is, heat exchange is required, since the temperature of the hot waste water in the hot water heat exchange pipe section 221 is higher than that of the fresh water in the fresh water heat exchange pipe section 181, the temperature of the fresh water rises by absorbing heat, and after circulation flow and heat exchange for a set period of time, the temperature of the fresh water in the water storage cavity 101 rises as a whole.

In this embodiment, since the heat exchanger 12 is located outside the water tank 10 as a whole, the internal space of the water tank 10 is not occupied, so that the effective volume of the water tank 10, which can be used for storing new water, can be effectively increased, that is, the water storage cavity 101 can have a larger volume. Due to the arrangement of the first water pump 20 and the second water pump 24, the liquid circulation flowing speed can be increased, and the heat exchange efficiency is improved. Through carrying out the heat exchange with hot waste water and new water, make the temperature of new water rise, realized the thermal recycle to hot waste water to can effectively reduce the required energy consumption of heating new water to the settlement temperature, saved the energy.

Referring to fig. 1, further, the dishwasher 100 may further include a water supply line 46, the water supply line 46 connecting the sump 10 and the washing unit 14, and fresh water inside the sump 10 may be supplied to the washing unit 14 through the water supply line 46. Specifically, the water tank 10 may have a fresh water outlet port 104, the fresh water outlet port 104 is communicated with the water storage cavity 101, the washing unit 14 may have a water inlet port, the water inlet port is communicated with the washing cavity 140, one end of the water supply pipeline 46 is communicated with the fresh water outlet port 104, and the other end of the water supply pipeline 46 is communicated with the water inlet port. In general, the inlet and second heat

exchange inlet connections

142 and 142 of the wash unit 14 may be different connections, both of which are provided independently of each other. Referring to the figure, the water supply line 46 may be provided with another shutoff valve 42 for on/off control of the line.

Referring to fig. 2, the washing chamber 140 may include a liner 147 and a water collecting cup 148, the water collecting cup 148 is located at the bottom wall of the liner 147 and is communicated with the liner 147, and the liner 147 and the water collecting cup 148 have a certain volume. The water inlet interface of the washing unit 14, the second heat exchange water inlet interface 142 and the second heat exchange water outlet interface 141 may all be disposed on the water collecting cup 148.

Further, referring to fig. 3, the dishwasher 100 may further include a drain line 28, the drain line 28 being connected to the washing unit 14, and waste water generated from washing may be discharged through the drain line 28. Specifically, the wash unit 14 has a drain interface that communicates with the wash chamber 140, and the drain line 28 communicates with the drain interface. To increase the rate of waste water discharge, a drain pump 30 may be provided on the drain line 28. Generally, the drain port of the washing unit 14 and the second heat exchange outlet port 141 may be different ports, and the two ports may be independently provided. That is, the washing unit 14 may have a water inlet, a water outlet, a second heat exchange water inlet 142 and a second heat exchange water outlet 141, which are independent from each other, and specifically, the water inlet, the water outlet, the second heat exchange water inlet 142 and the second heat exchange water outlet 141 are all disposed on the water collecting cup 148, the water inlet is used for introducing new washing water output from the water storage cavity 101, the water outlet is used for discharging washing wastewater from the washing cavity 140, and the first heat exchange water inlet 142 and the first heat exchange water outlet 141 are used for circulating the heating wastewater. Generally, the fresh water in the reservoir cavity 101 can flow into the washing cavity 140 through the water supply line 46 under the action of its own weight, so that the fresh water outlet 104 of the water tank 10 can be higher than the water inlet of the washing unit 14 in the direction of gravity.

Referring to fig. 1, further, the washing unit 14 further includes a spray arm 145 and a delivery pipe 149, the spray arm 145 is located in the washing chamber 140 of the washing unit 14, and the spray arm 145 may have one or more spray arms. Each of the spray arms 145 may have a water inlet through which wash water may enter the spray arm 145 and may be sprayed toward the dishes through the nozzles of the spray arm 145, thereby washing the dishes. The water collection cup 148 is connected to each spray arm 145 by a delivery line 149. The transfer line 149 may be provided with a washing pump which can pump washing water from the inside of the sump cup 148 and pressurize the washing water to be transferred to the spray arms 145 through the transfer line 149. When there are a plurality of spray arms 145, they may be spaced apart in the direction of gravity, may be spaced apart in the horizontal direction, or may be mixed in the horizontal direction and the direction of gravity.

Alternatively, the washing pump may be the second water pump 24 described above, i.e., the second water pump 24 circulates the hot wastewater in the hot water pipe 22 when heat exchange is required. When washing is required, the second water pump 24 delivers the washing water in the washing chamber 140 to the spray arms 145 through the delivery pipes 149. In the structure, only one water pump is needed, so the structure is simple.

Optionally, the dishwasher 100 includes a washing pump and a second water pump 24 that are independent from each other, and correspondingly, the washing unit 14 is provided with a second heat-exchange water outlet port 141 that is communicated with the second water pump 24 and a water outlet port that is communicated with the washing pump, and the water outlet port and the second heat-exchange water outlet port 141 may be independent from each other. In this configuration, the delivery line 149 and hot water line 22 may not share a common pipe section.

Referring to fig. 1, in one embodiment, the water tank 10 may further include a water inlet line 106 and a new water inlet interface 105, the water inlet line 106 is separated from the water storage cavity 101, the new water inlet interface 105 is located at the bottom of the water inlet line 106 and is communicated with the water inlet line 106, the dishwasher 100 further includes a water supply line 34, the new water inlet interface 105 is capable of being connected to a municipal water source through the water supply line 34, so that the new water at normal temperature can flow into the water inlet line 106 through the water supply line 34 and the new water inlet interface 105. The top of the inlet line 106 may communicate with the top of the reservoir cavity 101, enabling fresh water to flow through the inlet line 106 and be stored in the reservoir cavity 101. The first heat exchange water inlet interface 103, the first heat exchange water outlet interface 102, the new water inlet interface 105 and the new water outlet interface 104 of the water tank 10 may all be located at the bottom of the water tank 10 and be arranged independently of each other.

Referring to fig. 1, a flow meter 36 may be disposed on the water supply line 34 or the water inlet line 106 to accurately meter the amount of fresh water flowing into the water tank 10. A flow meter 36 is provided in the water supply line 34 to facilitate user viewing of the metering. The flow meter 36 is disposed in the water inlet line 106 and is disposed within the tank 10. The water supply line 34 may be provided with a shut-off valve 44. The water inlet line 106 is located inside the water tank 10, and may be a water pipe or a plurality of baffles inside the water tank 10.

Referring to fig. 1 and fig. 4, in an embodiment, the new water pipeline 18 connects the water tank 10 and the heat exchanger 12, the new water pipeline 18 penetrates the heat exchanger 12, the heat exchanger 12 divides the new water pipeline 18 into a first pipe section 182, a new water heat exchange pipe section 181 and a second pipe section 183, the first pipe section 182 is a pipe section located between the heat exchanger 12 and the first heat exchange water outlet port 102, the heat exchange pipe section 181 is a pipe section located in the heat exchange cavity 121, and the third pipe section 183 is a pipe section located between the heat exchanger 12 and the first heat exchange water inlet port 103. A hot water line 22 connects the washing chamber 140 and the heat exchanger 12. The hot water pipeline 22 penetrates through the heat exchanger 12, the heat exchanger 12 divides the hot water pipeline 22 into a third pipe section 222, a hot water heat exchange pipe section 221 and a fourth pipe section 223, the third pipe section 222 is a pipe section located between the heat exchanger 12 and the second heat exchange water outlet connector 141, the hot water heat exchange pipe section 221 is a pipe section located in the heat exchange cavity 121, and the fourth pipe section 223 is a pipe section located between the heat exchanger 12 and the second heat exchange hot water inlet connector 142.

Optionally, the heat exchanger 12 has a first new water connection 122, a second new water connection 123, a first hot water connection 124 and a second hot water connection 125. The new water pipeline 18 may be an integral pipeline, one end of which is connected to the first heat exchange water outlet port 102, the other end of which is connected to the first heat exchange water inlet port 103, and the portion between the two ends is the middle portion of the new water pipeline 18, as shown in fig. 4, and the middle portion is penetrated by the first new water port 122 and the second new water port 123 of the heat exchanger 12. The hot water pipeline 22 may be a whole pipeline, one end of which is connected to the second heat exchange outlet port 141, the other end of which is connected to the second heat exchange inlet port 142, and the portion between the two ends is the middle portion of the hot water pipeline 22, as shown in fig. 4, and the middle portion is penetrated by the first hot water port 124 and the second hot water port 125 of the heat exchanger 12.

Alternatively, the new water line 18 may be comprised of a plurality of independently disposed pipe sections joined in series. The hot water line 22 may be made up of a plurality of independently disposed pipe sections joined in series. The heat exchanger 12 may have a first new water port 122, a second new water port 123, a first hot water port 124 and a second hot water port 125 in communication with the heat exchange cavity 121.

The fresh water heat exchange pipe section 181 connects the first fresh water port 122 and the second fresh water port 123. The first pipe section 182 connects the first hot water outlet 102 and the first fresh water inlet 122. The second pipe segment 183 connects the first heat exchange water inlet connection 103 and the second fresh water connection 123.

The hot water heat exchange pipe section 221 connects the first hot water port 124 and the second hot water port 125. The third pipe section 222 connects the second hot water outlet port 141 and the first hot water port 124. The fourth pipe segment 223 connects the second heat exchange water inlet port 142 and the second hot water port 125.

Alternatively, the new and hot water heat

exchange tube segments

181 and 221 may be defined by heat exchangers. For example, the heat exchange cavity 121 may be divided into two parts, one part as a new water heat exchange pipe section 181 and the other part as a hot water heat exchange pipe section 221. For example, a plurality of baffles may be disposed in the heat exchange chamber 121, one set of baffles forms the new water heat exchange pipe section 181, and the other set of baffles forms the hot water heat exchange pipe section 221.

Referring to fig. 4, in an exemplary embodiment, the new water heat exchange pipe section 181 and the hot water heat exchange pipe section 221 are disposed adjacent to each other, and both the new water heat exchange pipe section 181 and the hot water heat exchange pipe section 221 may be disposed inside the heat exchange cavity 121 of the heat exchanger 12 in a winding manner. Because the two pipelines are in a circuitous and bent shape, the length of new water and hot water flowing through can be increased, and the heat exchange effect is improved. In order to further improve the heat exchange effect, the new water heat exchange pipe section 181 and the hot water heat exchange pipe section 221 may be made of a material with good heat transfer performance, a material layer with good heat transfer performance may be disposed between the two pipes, or a heat dissipation member, such as a heat dissipation fin, may be disposed on the hot water heat exchange pipe section 221. The shapes of the new water heat exchange pipe section 181 and the hot water heat exchange pipe section 221 may be designed according to heat dissipation requirements and manufacturing requirements.

In one embodiment, the new water line 18 and the hot water line 22 of the dishwasher 100 require on-off control. When the heat recovery is needed to be performed on the washing wastewater, the new water pipeline 18 and the hot water pipeline 22 are both conducted, the new water and the hot wastewater respectively flow in the new water pipeline 18 and the hot water pipeline 22, and heat exchange is performed in the heat exchange cavity 121, so that the temperature of the new water is increased. When heat recovery is not required, the fresh water line 18 and the hot water line 22 are disconnected from each other, and the water tank 10 can supply water to the washing chamber 140 through the water supply line 46. The water in the washing chamber 140 can be delivered to each spray arm 145 through the delivery pipe 149, thereby realizing spray washing of the dishes.

Alternatively, the new water line 18 and the hot water line 22 are on-off controlled by water pumps, i.e., the first water pump 20 and the second water pump 24 may be water pumps with a shut-off function. The first water pump 20 is disposed on the new water pipeline 18, such as the first pipe section 182 or the second pipe section 183 of the new water pipeline 18, and generally, the first water pump 20 may be disposed on the first pipe section 182 so as to be closer to the first heat-exchange water outlet interface 102 of the water tank 10. The second water pump 24 is disposed on the hot water pipeline 22, such as a third pipe section 222 or a fourth pipe section 223 of the hot water pipeline 22, and in general, the second water pump 24 may be disposed on the third pipe section 222, so as to be closer to the second heat exchange outlet port 141 of the washing unit 14. When heat recovery is required, the first water pump 20 and the second water pump 24 are both turned on, so that the new water pipeline 18 and the hot water pipeline 22 are both conducted. At the end of the heat recovery, the first and second water pumps 20, 24 are both turned off, so that the new water line 18 and the hot water line 22 are both disconnected.

Alternatively, referring to fig. 1, the new water line 18 and the hot water line 22 are controlled by on-off valves. That is, the new water line 18 is provided with a first shut-off valve 38, and the hot water line 22 is provided with a second shut-off valve 40. The first shut off valve 38 may be located in a first section 182 of the new water line 18 and the first shut off valve 38 may be located between the first water pump 20 and the heat exchanger 12. The second cut-off valve 40 may be located in the third pipe 222 of the hot water pipe 22 and the second cut-off valve 40 may be located between the second water pump 24 and the heat exchanger 12.

When heat recovery is required, the first and second cut-off

valves

38 and 40 are opened, and the first and second water pumps 20 and 24 are operated to circulate fresh water in the fresh water pipe 18 and hot waste water in the hot water pipe 22 for heat exchange in the heat exchanger 12. At the end of the heat recovery, the first and second water pumps 20, 24 are closed, and the first and second shut-off

valves

38, 40 are both closed.

In this structure, the second heat exchange water inlet port 142 and the second heat exchange water outlet port 141 are both disposed on the water collecting cup 148, and the hot waste water flows out of the water collecting cup 148 and flows back to the water collecting cup 148 through the hot water pipeline 22. The dishwasher 100 may include the shunt valve 32, the shunt valve 32 is provided to the delivery line 149, and when there are a plurality of spray arms 145, the shunt valve 32 may selectively distribute the washing water to one spray arm 145 or to a plurality of spray arms 145 at the same time. As shown in fig. 2, the third pipe section 222 of the hot water pipe 22 and the delivery pipe 149 have a common pipe section 224 that coincides, and the second water pump 24 is located at the common pipe section 224. When heat recovery is required, the shunt valve 32 is closed. When the washing water needs to be delivered, the shunt valve 32 is opened, and under the action of the second water pump 24, the washing water in the washing cavity 140 flows through the second water pump 24 and the shunt valve 32 and then enters each spray arm 145. In a modified structure, the water diversion valve 32 is not needed, and when the washing water needs to be conveyed, the washing water in the washing cavity 100 is directly conveyed to each spray arm 145 through the second water pump 24 and the conveying pipeline 149; the transfer line 149 may be disconnected during heat recovery.

In this structure, when heat is recovered, the shunt valve 32 is closed, and the hot waste water does not enter the inner container 147 through the transfer line 149, so that heat loss can be reduced.

Alternatively, referring to fig. 2, the new water pipeline 18 is controlled by a stop valve, and the hot water pipeline 22 is controlled by a shunt valve 32. The new water line 18 is provided with a first shut-off valve 38, which first shut-off valve 38 may be provided in a second section 183 of the new water line 18. The shunt valve 32 has a first port 32a, one or more second ports 32b, and a third port 32c. The first port 32a communicates with the outlet of the second water pump 24, the second port 32b communicates with the inlet of the spray arm 145, and the third port 32c communicates with the first hot water port 124 of the heat exchanger 12. One or more second ports 32b may be provided, one or more spray arms 145 may be provided, and the second ports 32b correspond to the spray arms 145 one to one.

When heat recovery is needed, the first water pump 20 and the second water pump 24 are both opened, the first interface 32a and the third interface 32c of the shunt valve 32 are communicated, so that the water outlet of the second water pump 24 is communicated with the first hot water interface 124 of the heat exchanger 12, the whole hot water pipeline 22 is communicated, and hot wastewater can circularly flow in the hot water pipeline 22. When the heat recovery is completed, the first cut-off valve 38, the first water pump 20, and the second water pump 24 are closed, and the first connection port 32a and the third connection port 32c of the diversion valve 32 are disconnected. When the washing water needs to be delivered, the second water pump 24 is turned on, so that the first port 32a is communicated with the second port 32b, the water outlet of the second water pump 24 is communicated with the water inlet of the spray arm 145, the whole delivery pipeline 149 is conducted, and the washing water in the washing chamber 140 can be introduced into the spray arm 145 through the delivery pipeline 149. When there are a plurality of spray arms 145, the first connection port 32a may be controlled to communicate with one of the second connection ports 32b or communicate with a plurality of the second connection ports 32b at the same time, so that the washing water can flow into one or more spray arms 145 through the second water pump 24 and the shunt valve 32.

In this configuration, the third pipe section 222 of the hot water pipe 22 and the delivery pipe 149 may have a common pipe section 224, and the second water pump 24 is provided at the common pipe section 224.

Optionally, referring to fig. 3 and 4, the new water pipeline 18 is controlled by the first cut-off valve 38, and the hot water pipeline 22 is controlled by the shunt valve 32.

The first shut-off valve 38 is provided in the second section 183 of the new water line 18 between the second new water connection 122 of the heat exchanger 12 and the first heat exchange water inlet connection 103 of the water tank 10.

The second water pump 24 is provided at the third pipe section 222 of the hot water pipe 22. The shunt valve 32 has a first port 32a, one or more second ports 32b, a third port 32c, and a fourth port 32d. The first port 32a is communicated with the water outlet of the second water pump 24, the second ports 32b are in one-to-one correspondence with the spray arms 145, each second port 32b is communicated with the water inlet of the corresponding spray arm 145, the third port 32c is communicated with the first hot water port 124 of the heat exchanger 12, and the fourth port 32d is communicated with the second hot water port 125 of the heat exchanger 12.

When heat recovery is required, the first water pump 20 and the second water pump 24 are both opened, the first stop valve 38 is opened, the first port 32a and the third port 32c of the shunt valve 32 are communicated, the fourth port 32d of the shunt valve 32 is communicated with one or more second ports 32b, and the hot wastewater flows through the second water pump 24, the first port 32a of the shunt valve 32, the third port 32c of the shunt valve 32, the first hot water port 124, the second hot water port 125, the fourth port 32d of the shunt valve 32, and the second port 32b of the shunt valve 32, and finally enters the washing chamber 140 through the spray arm 145. At the end of the heat recovery, the first cut-off valve 38 is closed and the first and second water pumps 20, 24 are shut off. When the washing water needs to be delivered, the second water pump 24 is turned on, the first port 32a and the second port 32b of the shunt valve 32 are communicated, and the washing water in the washing chamber 140 flows through the second water pump 24, the first port 32a of the shunt valve 32, the second port 32b of the shunt valve 32, and finally flows into the spray arm 145, and the spray arm 145 sprays the washing water to the dishes.

In this configuration, the transfer line 149 and the hot water line 22 partially overlap, and the hot water line 22 is used to circulate hot wastewater when heat recovery is required. In washing, the hot water line 22 is used to deliver washing water to the inner tub 147. The second heat exchange water outlet port 141 is arranged on the water collecting cup 148, the second heat exchange water inlet port 142 is arranged on the spray arm 145, and when heat recovery is needed, hot waste water flows out of the water collecting cup 148 and flows back to the inner container 147 through the spray arm 145 via the hot water pipeline 22.

With reference to the above embodiments, the operation of the dishwasher 100 provided by one embodiment will be described. The wash stage of the dishwasher 100 may include a pre-wash stage, a main wash stage, a cold rinse stage, a hot rinse stage, and a dry stage. The pre-wash stage is primarily to allow fresh water for washing to soak the contaminants on the dishes, so that the contaminants are more easily washed away in the subsequent wash stage. The pre-wash stage typically does not require heating of fresh water, which is typically ambient temperature water, and can be directed from the tank 10. The pre-washing stage generally includes a pre-draining process, a water supply process, a washing process, and a draining process, and the pre-draining process generally drains the washing water left in the washing chamber 140 during the last washing. The water supply process is usually to supply fresh water at normal temperature from the water tank 10 to the washing chamber 140. The washing process generally involves delivering wash water from the washing chamber 140 to the spray arms 145 via the delivery line 149 for spray cleaning of the dishes. The drainage process is to drain the washing wastewater in the stage. The main washing stage and the hot bleaching stage can both comprise a water supply process, a heating process, a washing process and a drainage process, the main washing stage usually adds a cleaning agent into washing water, and the hot bleaching stage usually does not add the cleaning agent. The cold bleaching stage may include a water supply process, a washing process and a water discharge process, and the washing water is not generally required to be heated in the cold bleaching stage. Usually, the heat recovery process can be performed before the water is discharged in the previous washing stage, the discharged hot waste water participates in the heat recovery process, for example, the heat recovery process can be performed in the main washing stage, the hot rinsing stage and the cold rinsing stage, and after the heat recovery, the water supply process in the next washing stage is performed. When the dishwasher has no cold-bleaching stage, the main wash stage and the hot-bleaching stage can be subjected to the heat recovery process described above. The above-mentioned washing stages are not intended to be limiting for the dishwasher of the present embodiment, and different models of functional dishwashers may have different washing stages.

Referring to fig. 1 and 5, for each complete washing process, before S500 before the draining of water in the present washing stage and S506 before the draining of water in the next washing stage, the following steps are included:

s501, when heat recovery is needed, the first water pump 20 and the second water pump 24 are started, the first stop valve 38 and the second stop valve 40 are opened, and the shunt valve 32 is closed;

s502, running for a set time to ensure that the new water in the new water heat exchange pipe section 181 and the hot wastewater in the hot water heat exchange pipe section 221 are subjected to full heat exchange, so that the temperature of the new water is increased; the set time is 2-10 minutes, and the set time can be set according to the washing requirement;

s503, when the heat recovery is finished, the first water pump 20 and the second water pump 24 are closed, and the first stop valve 38 and the second stop valve 40 are closed;

s504, when water is supplied, the second water pump 24 and the shunt valve 32 are opened, so that new water in the water tank 10 flows into the washing cavity 140, and the new water is relatively normal temperature and has higher temperature due to the heat exchange process;

s505, a normal washing step or a heating washing, wherein the heating washing is to heat the new water that has been heat exchanged again until the temperature reaches a set temperature, and the hot water reaching the set temperature is reused for washing, and the reheating may be to heat the washing water inside the washing chamber 140 by using the heating device of the washing unit 14. The normal washing means that washing is directly performed using fresh water that has been heat-exchanged.

For the dishwasher 100, it may include a water tank 10 having a water storage chamber 101, a washing unit 14 having a washing chamber 140, and a heat exchanger 12. The fresh water in the reservoir chamber 101 is circulated by the provision of the first water pump 20 and the fresh water line 18. The second water pump 24 and the hot water pipe 22 are provided to circulate the hot waste water in the washing chamber 140. By providing the water supply line 46, fresh water in the reservoir chamber 101 can be supplied to the washing chamber 140. The supply pipe 149 is provided to supply the washing water in the washing chamber 140 to each spray arm 145. The washing chamber 140 may have a bottom wall and a side wall, and the second heat-exchanging water inlet 142 and the second heat-exchanging water outlet 141 may be disposed on the bottom wall, so that during the heat exchange, the hot waste water flows out of the washing chamber 140 from the bottom wall and flows back to the washing chamber 140 from the bottom wall through the hot water pipe 22, and the heat loss during the heat exchange is small. In another structure, the second heat-exchange water outlet port 141 is disposed on the bottom wall, the second heat-exchange water inlet port 142 is disposed on the spray arm 145, and the hot wastewater flows out of the washing chamber 140 from the bottom wall, and flows back to the washing chamber 140 from the spray arm 145 through the delivery pipe 149 after being lifted.

The above only is the preferred embodiment of the present invention, not so limiting the patent scope of the present invention, all under the concept of the present invention, the equivalent structure transformation made by the contents of the specification and the drawings is utilized, or the direct/indirect application is included in other related technical fields in the patent protection scope of the present invention.

Claims

1. A dishwasher characterized by having a heat exchange process, the dishwasher comprising,

the new water pipeline is connected with the first heat exchange water inlet connector and the first heat exchange water outlet connector and is provided with a new water heat exchange pipe section positioned in the heat exchange cavity;

the first water pump is arranged on the new water pipeline;

the second water pump is arranged on the hot water pipeline; and a (C) and (D) and,

in the heat exchange process, the hot waste water flowing through the hot water heat exchange pipe section and the fresh water flowing through the fresh water heat exchange pipe section exchange heat in the heat exchange cavity, so that the temperature of the fresh water is increased.

2. The dishwasher of claim 1,

the dishwasher further comprises an on-off controller;

the washing unit also comprises a conveying pipeline and one or more spray arms, the spray arms are arranged in the washing cavity, and the conveying pipeline is connected with the washing cavity and the spray arms; and a process for the preparation of a coating,

and the on-off of the new water pipeline, the hot water pipeline and the conveying pipeline are controlled by the on-off controller.

3. The dishwasher of claim 2,

the washing cavity comprises an inner container and a water collecting cup, the spray arm is positioned in the inner container, and the water collecting cup is positioned at the bottom of the inner container and is communicated with the inner container;

the second heat exchange water outlet port is arranged on the water collecting cup, and the second heat exchange water inlet port is arranged on the water collecting cup or the spray arm.

4. The dishwasher of claim 2,

the dishwasher also comprises a shunt valve which is arranged on the conveying pipeline;

the on-off controller comprises a first stop valve and a second stop valve, the first stop valve is arranged on the new water pipeline, and the second stop valve is arranged on the hot water pipeline; and a (C) and (D) and,

in the heat exchange process, the first water pump and the second water pump are opened, the first stop valve and the second stop valve are both opened, and the shunt valve is closed.

5. The dishwasher of claim 2,

the delivery pipeline and the hot water pipeline are provided with a common pipe section;

the on-off controller comprises a first stop valve and a shunt valve, the first stop valve is arranged on the new water pipeline, and the shunt valve is arranged on the common pipe section; and a (C) and (D) and,

in the heat exchange process, the first water pump and the second water pump are opened, the first stop valve is opened, and the water dividing valve enables the hot water pipeline to be connected and the conveying pipeline to be disconnected.

6. The dishwasher of claim 2,

the on-off controller comprises a first stop valve and a shunt valve, and the first stop valve is arranged on the new water pipeline;

the heat exchanger is provided with a first hot water interface and a second hot water interface, and the hot water heat exchange pipe section is connected with the first hot water interface and the second hot water interface;

the shunt valve is provided with a first interface, a second interface, a third interface and a fourth interface, the first interface is communicated with the second heat exchange water outlet interface, the second interface is communicated with the spray arm, the third interface is communicated with the first hot water interface, and the fourth interface is communicated with the second hot water interface; and a process for the preparation of a coating,

in the heat exchange process, the first water pump and the second water pump are opened, the first interface is communicated with the third interface, and the second interface is communicated with the fourth interface.

7. The dishwasher of claim 1, characterized in that the washing unit further comprises a heating device capable of heating the washing water in the washing chamber.

8. The dishwasher of claim 1, wherein the wash unit further has a drain interface, the dishwasher further comprising a drain line connected to the drain interface of the wash unit and a drain pump disposed in the drain line.

9. The dishwasher of claim 1, wherein the tank further comprises a water inlet line in communication with the reservoir cavity.

10. The dishwasher of claim 1, having a main wash stage and a hot rinse stage, both having the heat exchange process.