Waste heat recovery device of dish washing machine

Abstract

The utility model discloses a waste heat recovery device of a dish-washing machine, which comprises a waste heat water tank filled with waste hot water, a waste hot water inlet and a waste hot water outlet are arranged on the waste heat water tank, and a plate heat exchanger which exchanges heat with the waste hot water in the waste heat water tank is arranged in the waste heat water tank. The plate heat exchanger is provided with a cold water pipe for cold water to flow into the plate heat exchanger and a hot water pipe for hot water to flow out of the plate heat exchanger. The plate heat exchanger with larger capacity and wider heat exchange area is arranged in the waste heat water tank, efficient heat exchange of waste hot water is achieved, the heat exchange efficiency of the waste heat recovery device of the dish-washing machine is higher, waste heat resources can be utilized to the maximum extent, energy consumption is reduced, and the purposes of energy conservation and environmental protection are achieved. And the method has remarkable economic and social benefits.

Description

Technical Field

[0001] The utility model relates to the technical field of dishwashers, in particular to a waste heat recovery device for a dishwasher. Background Art

[0002] Dishwashers are commonly used appliances in daily household life, used to wash dishes and other tableware. During the operation of the dishwasher, a large amount of waste hot water is generated. These waste hot water are often directly discharged in traditional dishwashers, resulting in waste of resources and burden on the environment. In order to make full use of these waste hot water resources, waste heat recovery technology has been proposed. However, in the prior art, the heat exchanger in the waste hot water tank of the dishwasher is usually a disc heat exchanger, which has a small capacity and a small heating area, so the heat exchange efficiency is low, which limits the recovery and reuse efficiency of waste heat, and cannot meet the needs of large-capacity heat exchange. Therefore, improvements are needed. Utility Model Content

[0003] The utility model aims to overcome the deficiencies of the prior art and provide a slag discharge device for a washing arm of a dishwasher which is easy to operate.

[0004] The technical solution of the utility model provides a waste heat recovery device for a dishwasher, the waste heat recovery device for the dishwasher comprises a waste hot water tank filled with waste hot water, the waste hot water tank is provided with a waste hot water inlet and a waste hot water outlet, the waste hot water tank is provided with a plate heat exchanger for performing heat exchange with the waste hot water in the waste hot water tank, the plate heat exchanger is provided with a cold water pipe for cold water to flow into the plate heat exchanger and a hot water pipe for hot water to flow out of the plate heat exchanger.

[0005] Furthermore, the plate heat exchanger includes a plurality of mutually adjacent heat exchange plates, each of the heat exchange plates is integrally formed with a liquid conducting channel for liquid to pass through the heat exchange plate, and any two adjacent liquid conducting channels are connected.

[0006] Furthermore, the heat exchange plate comprises a front plate and a rear plate, and the front plate and the rear plate are connected to form the heat exchange plate.

[0007] Furthermore, the front plate and the rear plate are respectively provided with a first groove structure and a second groove structure, and the first groove structure and the second groove structure cooperate to form the liquid guiding channel.

[0008] Furthermore, the liquid guiding channel is integrally formed on the heat exchange plate in a wave shape.

[0009] Furthermore, the heat exchange plate is provided with a liquid inlet for liquid to flow into the liquid guiding channel and a liquid outlet for liquid to flow out of the liquid guiding channel, and any two adjacent liquid inlets and liquid outlets are connected.

[0010] Further, any two adjacent liquid outlets and the liquid inlet are connected by a delivery pipe, one end of the delivery pipe is connected to the liquid outlet, and the other end is connected to the liquid inlet; or any two adjacent liquid outlets and the liquid inlet are respectively connected to a liquid outlet pipe and a liquid inlet pipe, and the liquid outlet pipe and the liquid inlet pipe are connected by Reverse thread A connection is provided, wherein a fastener is provided at the connection.

[0011] Furthermore, the cold water pipe is connected to the liquid inlet on one of the heat exchange plates.

[0012] Furthermore, a plurality of the liquid conducting channels are vertically arranged in the waste hot water tank; or a plurality of the liquid conducting channels are horizontally arranged in the waste hot water tank.

[0013] Furthermore, the plate heat exchanger is provided with at least one fixing frame for fixing a plurality of the heat exchange plates.

[0014] Furthermore, the hot water pipe is connected to the liquid outlet on one of the heat exchange plates via a connecting pipe, and the connecting pipe is arranged on a plurality of the heat exchange plates.

[0015] Furthermore, the cold water pipe and the hot water pipe are located on the same side of the plate heat exchanger.

[0016] Furthermore, an overflow pipe is provided in the waste hot water tank, an overflow port is provided at the upper end of the overflow pipe, and the lower end is connected to the waste hot water outlet.

[0017] After adopting the above technical solution, the following beneficial effects are achieved:

[0018] The utility model realizes efficient heat exchange of waste hot water by designing a plate heat exchanger with larger capacity and wider heat exchange area in the waste hot water tank. The waste heat recovery device of the dishwasher has higher heat exchange efficiency, can make maximum use of waste heat resources, reduce energy consumption, achieve the purpose of energy saving and environmental protection, and has significant economic and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The disclosure of the present invention will become easier to understand with reference to the accompanying drawings. It should be understood that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In the drawings:

[0020] Figure 1 is a schematic diagram of a dishwasher waste heat recovery device applied to a dishwasher in one embodiment of the utility model;

[0021] Figure 2 is a schematic diagram of a waste heat recovery device for a dishwasher in one embodiment of the utility model;

[0022] Figure 3is a three-dimensional diagram of a waste heat recovery device for a dishwasher in one embodiment of the utility model;

[0023] Figure 4 It is a three-dimensional diagram of a vertical plate heat exchanger in one embodiment of the utility model;

[0024] Figure 5 It is a three-dimensional view from another angle of a vertical plate heat exchanger in one embodiment of the utility model;

[0025] Figure 6 It is a three-dimensional diagram of a horizontal plate heat exchanger in one embodiment of the utility model;

[0026] Figure 7 is a three-dimensional diagram of a heat exchanger in one embodiment of the utility model;

[0027] Figure 8 yes Figure 7 A front view of one of the heat exchangers;

[0028] Fig. 9 yes Figure 7 Rear view of one of the heat exchangers.

[0029] Reference table of reference numerals:

[0030] Waste hot water tank 1: waste hot water inlet 11, waste hot water outlet 12; overflow pipe 13; overflow outlet 131;

[0031] Plate heat exchanger 2: cold water pipe 21, hot water pipe 22, heat exchange plate 23: liquid guide channel 231, liquid inlet 232, liquid outlet 233, front plate 234, first groove structure 2341, rear plate 235, second groove structure 2351, fixing frame 24, connecting pipe 25, delivery pipe 26: liquid inlet pipe 261, liquid outlet pipe 262, fastener 263. DETAILED DESCRIPTION

[0032] The specific implementation of the present utility model will be further described below in conjunction with the accompanying drawings.

[0033] It is easy to understand that according to the technical solution of the utility model, without changing the essential spirit of the utility model, a variety of structural modes and implementation modes can be replaced by those skilled in the art. Therefore, the following specific implementation methods and drawings are only exemplary descriptions of the technical solution of the utility model, and should not be regarded as the entirety of the utility model or as a limitation or restriction on the technical solution of the utility model.

[0034] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. They are relative concepts and may change accordingly according to their different positions and different usage conditions. Therefore, these or other directional terms should not be interpreted as restrictive terms. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above-mentioned in the present utility model can be understood according to the specific circumstances.

[0036] In some embodiments of the utility model, a waste hot water tank 1 containing waste hot water is included, the waste hot water tank 1 is provided with a waste hot water inlet 11 and a waste hot water outlet 12, a plate heat exchanger 2 for heat exchange with the waste hot water in the waste hot water tank 1 is provided in the waste hot water tank 1, and the plate heat exchanger 2 is provided with a cold water pipe 21 for cold water to flow into the plate heat exchanger 2 and a hot water pipe 22 for hot water to flow out of the plate heat exchanger 2.

[0037] Specifically, Figure 1The waste hot water tank 1 is filled with waste hot water, which comes from the waste hot water in the dishwasher circulating water tank. The waste hot water tank 1 is provided with a waste hot water inlet 11 and a waste hot water outlet 12, which are used to guide the waste hot water into and out of the waste hot water tank 1. The waste hot water in the dishwasher circulating water tank flows into the waste hot water inlet 11 through the drain pipe. The waste hot water inlet 11 is responsible for introducing the waste hot water generated by the dishwasher into the waste hot water tank 1, and the waste hot water outlet 12 is responsible for discharging the waste hot water after heat exchange from the waste hot water tank 1. The plate heat exchanger 2 is located in the waste hot water tank 1, and is used to realize the heat exchange between the waste hot water and the cold water. The plate heat exchanger 2 has a large heat exchange area to improve the heat exchange efficiency. The cold water pipe 21 is connected to the cold water source, and the cold water flows into the plate heat exchanger 2 to exchange heat with the waste hot water. The hot water pipe 22 is responsible for the hot water to flow out of the plate heat exchanger 2, which can be connected to the hot water use system. The cold water pipe 21 is connected to the cold water source to supply cold water, and the hot water pipe 22 is connected to the hot water use system to transport the hot water to the place where it is needed. The waste hot water inlet 11 introduces the waste hot water into the waste hot water tank 1, and the waste hot water outlet 12 is connected to the discharge system to discharge the waste hot water after heat exchange. The waste hot water tank 1 is located at the bottom or side of the dishwasher to receive the waste hot water generated by the dishwasher. The plate heat exchanger 2 is installed in the waste hot water tank 1 to ensure that the waste hot water can fully exchange heat with the cold water. After the waste hot water enters the waste hot water tank 1 through the waste hot water inlet 11, it exchanges heat with the cold water flowing in the plate heat exchanger 2. The cold water flows into the plate heat exchanger 2 from the cold water pipe 21 and absorbs the heat of the waste hot water. At the same time, the waste hot water is cooled, and the cold water becomes warm water and flows out of the plate heat exchanger 2. It can be further heated into hot water and supplied to other systems or equipment that need hot water. The cooled waste hot water flows out of the waste hot water tank 1 and is discharged through the waste hot water outlet 12, which can be further processed or discharged. By using the plate heat exchanger 2, the heat exchange area is increased, the heat exchange efficiency between the waste hot water and the cold water is improved, and thus the heat exchange efficiency is improved. By utilizing the waste heat recovery principle, the heat energy in the waste hot water of the dishwasher can be effectively recovered and used to heat the water required by other systems, saving energy, reducing energy consumption, and achieving the goal of energy conservation and environmental protection.

[0038] In some embodiments of the present invention, the plate heat exchanger 2 includes a plurality of adjacent heat exchange plates 23 , each heat exchange plate 23 is integrally formed with a liquid guide channel 231 for liquid to pass through the heat exchange plate 23 , and any two adjacent liquid guide channels 231 are connected.

[0039] Specifically, the heat exchange plates 23 constitute the surface of the plate heat exchanger 2 for heat exchange, and each heat exchange plate 23 is integrally formed with a liquid guide channel 231. The liquid guide channel 231 is integrally formed on the heat exchange plate 23 for liquid to flow through to achieve heat exchange. The liquid guide channel 231 on each heat exchange plate 23 is responsible for guiding the liquid flowing through. The heat exchange plates 23 are arranged into a plurality of adjacent plates to form the entire plate heat exchanger 2. The liquid guide channel 231 is located on each heat exchange plate 23 and communicates with the adjacent liquid guide channels 231 to achieve the flow of liquid and heat exchange between the plates. The heat exchange plates 23 are adjacent to each other and are arranged evenly at intervals to form the structure of the entire plate heat exchanger 2. The structure of multiple adjacent heat exchange plates 23 and liquid guide channels 231 increases the heat exchange area and improves the heat exchange efficiency. It is more efficient than the traditional disc heat exchanger. The design of the plate heat exchanger 2 makes the waste heat recovery device have a larger capacity and can process more waste hot water.

[0040] In some embodiments of the present invention, the liquid guiding channel 231 is integrally formed on the heat exchange plate 23 in a wave shape.

[0041] Specifically, the wavy liquid-conducting channel 231 is arranged in a wavy shape. Compared with the planar liquid-conducting channel 231, the special structure of the wave crests and troughs makes the surface area larger. Such a design can effectively increase the contact area of ​​heat exchange, thereby improving the heat exchange efficiency. The wave structure of the wavy liquid-conducting channel 231 can increase the resistance and turbulence effect of the fluid flow, thereby causing the liquid to generate turbulence in the channel. The turbulent flow can further enhance heat transfer and improve heat exchange efficiency. The irregular structure of the wavy liquid-conducting channel 231 causes the fluid speed in the channel to change and the flow path to be distorted, thereby accelerating the heat transfer rate between the fluid and the channel wall, further enhancing the heat exchange effect.

[0042] In some embodiments of the present invention, the heat exchange plate 23 is provided with a liquid inlet 232 for liquid to flow into the liquid guiding channel 231 and a liquid outlet 233 for liquid to flow out of the liquid guiding channel 231, and any two adjacent liquid inlets 232 and liquid outlets 233 are connected.

[0043] Specifically, the liquid inlet 232 is provided on the heat exchange plate 23, and is used for the liquid to flow into the liquid guide channel 231, and is connected to the liquid guide channel 231 to ensure that the liquid flows smoothly into the channel. The liquid outlet 233 is provided on the heat exchange plate 23, and is used for the liquid to flow out of the liquid guide channel 231, and is connected to the liquid guide channel 231 to ensure that the liquid flows out of the channel. The liquid guide channel 231 on each heat exchange plate 23 is provided with a liquid inlet 232 and a liquid outlet 233 at both ends, respectively, and the liquid guide channels 231 on two adjacent heat exchange plates 23 are connected through the liquid inlets 232 and the liquid outlets 233 on the two heat exchange plates 23, thereby connecting the liquid guide channels 231 on all the heat exchange plates 23 in series.

[0044] In some embodiments of the present invention, Figure 7 Any two adjacent liquid outlets 233 and liquid inlets 232 are connected by a delivery pipe 26 , one end of the delivery pipe 26 is connected to the liquid outlet 233 , and the other end is connected to the liquid inlet 232 .

[0045] Specifically, Figure 7 The two ends of the delivery pipe 26 are respectively connected to the liquid inlet 232 and the liquid outlet 233 by welding.

[0046] In some embodiments of the present invention, Figure 4 Any two adjacent liquid outlets 233 and liquid inlet 2 are connected to a liquid outlet pipe and a liquid inlet pipe respectively, and the liquid outlet pipe and the liquid inlet pipe are connected to each other through Reverse thread Connection, with fasteners at the connection.

[0047] Specifically, the reverse threaded connection provides a secure connection, prevents the pipe from loosening or falling off, and ensures the stable operation of the system. The reverse threaded connection can effectively prevent liquid leakage, maintain the sealing of the system, and avoid energy waste.

[0048] In some embodiments of the present invention, the cold water pipe 21 is connected to a liquid inlet 232 on one of the heat exchange plates 23. Specifically, the liquid inlet 232 receives cold water input from the cold water pipe 21, and the cold water enters the liquid guide channel 231 through the liquid inlet 232 for heat exchange.

[0049] In some embodiments of the present invention, Figure 3 and Figure 5 , multiple liquid-conducting channels 231 are vertically arranged in the waste hot water tank 1; or multiple liquid-conducting channels 231 are horizontally arranged in the waste hot water tank 1. Specifically, the plate heat exchanger 2 can be a vertical plate heat exchanger or a horizontal plate heat exchanger. When the plate heat exchanger is a vertical plate heat exchanger, the liquid in the liquid-conducting channels 231 flows in the vertical direction; when the plate heat exchanger is a horizontal plate heat exchanger, the liquid in the liquid-conducting channels 231 flows in the horizontal direction. Users can choose vertical or horizontal arrangement according to actual needs to adapt to different dishwasher designs or waste hot water tank 1 sizes.

[0050] In some embodiments of the present invention, at least one fixing frame 24 for fixing a plurality of heat exchange plates 23 is disposed on the plate heat exchanger 2 .

[0051] Specifically, the fixing frame 24 is installed on the plate heat exchanger 2, and multiple heat exchange plates 23 are fixed together by appropriate assembly methods to ensure that they do not move relative to each other. The fixing frame 24 is located on the plate heat exchanger 2, and fixes multiple heat exchange plates 23 to ensure that they maintain a relatively stable position. Fixing multiple heat exchange plates 23 by the fixing frame 24 can enhance the stability of the heat exchange plates 23 and prevent them from moving or loosening during the heat exchange process.

[0052] In some embodiments of the present invention, the cold water pipe 21 and the hot water pipe 22 are located on the same side of the plate heat exchanger 2 .

[0053] Specifically, the cold water pipe 21 and the hot water pipe 22 are located on the same side mainly for the convenience of maintenance and replacement. This design can indeed simplify the maintenance process and make it easier for maintenance personnel to access and handle these pipes. This can reduce maintenance time, improve maintenance efficiency, reduce maintenance costs, and have a positive impact on the reliability and maintainability of the system.

[0054] In some embodiments of the present invention, the hot water pipe 22 is connected to the liquid outlet 233 on one of the heat exchange plates 23 via a connecting pipe 25 .

[0055] Specifically, the connection is made through the connecting pipe 25, which is preferably a corrugated pipe, so that the cold water pipe 21 and the hot water pipe 22 can be located on the same side of the plate heat exchanger 2. The hot water after heat exchange should originally be discharged from the other side of the plate heat exchanger 2, but after the connecting pipe 25 is provided, the cold water pipe 21 and the hot water pipe 22 can be located on the same side of the plate heat exchanger 2. The pipeline layout is simplified, making the connection between the hot water pipe 22 and the liquid outlet 233 more convenient. The hot water after heat exchange flows out through the connecting pipe 25, is connected to the liquid outlet 233, and flows out of the heat exchange plate 23. The connection is made through the connecting pipe 25, so that the hot water pipe 22 and the cold water pipe 21 are located on the same side of the plate heat exchanger 2, simplifying the pipeline layout, making the connection between the hot water pipe 22 and the liquid outlet 233 more convenient.

[0056] The utility model realizes efficient heat exchange of waste hot water by designing a plate heat exchanger 2 with larger capacity and wider heat exchange area in the waste hot water tank 1. The waste heat recovery device of the dishwasher has higher heat exchange efficiency, can make maximum use of waste heat resources, reduce energy consumption, achieve the purpose of energy saving and environmental protection, and has significant economic and social benefits.

[0057] The above are only the principles and preferred embodiments of the present invention. It should be noted that, for those skilled in the art, on the basis of the principles of the present invention, several other modifications can be made, which should also be considered as the protection scope of the present invention.

Claims

1. A waste heat recovery device for a dishwasher, characterized in that: The dishwasher waste heat recovery device includes a waste hot water tank filled with waste hot water, the waste hot water tank is provided with a waste hot water inlet and a waste hot water outlet, the waste hot water tank is provided with a plate heat exchanger for heat exchange with the waste hot water in the waste hot water tank, and the plate heat exchanger is provided with a cold water pipe for cold water to flow into the plate heat exchanger and a hot water pipe for hot water to flow out of the plate heat exchanger.

2. The dishwasher waste heat recovery device according to claim 1, characterized in that: The plate heat exchanger comprises a plurality of mutually adjacent heat exchange plates, each of the heat exchange plates is integrally formed with a liquid conducting channel for liquid to pass through the heat exchange plate, and any two adjacent liquid conducting channels are connected.

3. The dishwasher waste heat recovery device according to claim 2, characterized in that: The heat exchange plate comprises a front plate and a rear plate, and the front plate and the rear plate are connected to form the heat exchange plate.

4. The waste heat recovery device for a dishwasher according to claim 3, characterized in that: The front plate and the rear plate are respectively provided with a first groove structure and a second groove structure, and the first groove structure and the second groove structure cooperate to form the liquid guiding channel.

5. The waste heat recovery device for a dishwasher according to claim 2, characterized in that: The liquid guiding channel is integrally formed on the heat exchange plate in a wave shape.

6. The waste heat recovery device for a dishwasher according to claim 2, characterized in that: The heat exchange plate is provided with a liquid inlet for liquid to flow into the liquid guiding channel and a liquid outlet for liquid to flow out of the liquid guiding channel, and any two adjacent liquid inlets and liquid outlets are connected.

7. The waste heat recovery device for a dishwasher according to claim 6, characterized in that: Any two adjacent liquid outlets and liquid inlets are connected by a delivery pipe, one end of the delivery pipe is connected to the liquid outlet, and the other end is connected to the liquid inlet; or any two adjacent liquid outlets and liquid inlets are respectively connected with a liquid outlet pipe and a liquid inlet pipe, the liquid outlet pipe and the liquid inlet pipe are connected by reverse threads, and fasteners are provided at the connection.

8. The waste heat recovery device for a dishwasher according to claim 6, characterized in that: The cold water pipe is connected to the liquid inlet on one of the heat exchange plates.

9. The waste heat recovery device for a dishwasher according to claim 2, characterized in that: A plurality of the liquid guiding channels are vertically arranged in the waste hot water tank; or a plurality of the liquid guiding channels are horizontally arranged in the waste hot water tank.

10. The waste heat recovery device for a dishwasher according to claim 2, characterized in that: The plate heat exchanger is provided with at least one fixing frame for fixing a plurality of the heat exchange plates.

11. The waste heat recovery device for a dishwasher according to claim 6, characterized in that: The hot water pipe is connected to the liquid outlet on one of the heat exchange plates via a connecting pipe, and the connecting pipe is arranged on a plurality of the heat exchange plates.

12. The waste heat recovery device for a dishwasher according to any one of claims 1 to 11, characterized in that: The cold water pipe and the hot water pipe are located on the same side of the plate heat exchanger.

13. The waste heat recovery device for a dishwasher according to any one of claims 1 to 11, characterized in that: An overflow pipe is provided in the waste hot water tank, an overflow port is provided at the upper end of the overflow pipe, and the lower end is connected to the waste hot water outlet.

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