A commercial energy-saving dishwasher that uses steam to preheat incoming water

Abstract

The present invention provides a commercial energy-saving dishwasher that uses steam to preheat incoming water. The dishwasher is equipped with a wash basin and an equipment box, which is equipped with a spray box, a spray pump, a main wash pump, and a drain pump. A removable waterproof cover is installed above the wash basin, and a rotatable spray arm is installed within the waterproof cover. A main wash sink is located at the bottom of the wash basin, and a preheated water tank is fixed within the waterproof cover, located directly above the main wash sink. The dishwasher is equipped with two main water inlet pipes connected to the city water supply. The first main water inlet pipe is a low-temperature main wash pipe directly connected to the spray arm, and the second water inlet pipe is a high-temperature main wash pipe connected to the preheated water tank inlet on one side of the preheated water tank. The water in the preheated water tank flows in a circuitous manner before being transported to the spray box. The water outlet of the spray box is connected to the spray arm via the spray pump. This device can effectively utilize the high-temperature steam generated during the washing process, thereby increasing the incoming water temperature and reducing the energy consumption required for heating.

Description

Technical Field

[0001] The invention relates to a commercial dishwasher, in particular to a commercial energy-saving dishwasher which utilizes steam to preheat inlet water. Background Art

[0002] A dishwasher is a machine that washes tableware after use. Existing dishwashers mostly use high-temperature hot water for disinfection and sterilization. The working process is: city water is connected to a heating box, and after heating, it is used as cleaning water and then discharged.

[0003] A large amount of high-temperature steam is generated during the high-temperature washing process, but this heat is not currently well utilized. Summary of the Invention

[0004] The present invention provides a commercial energy-saving dishwasher that uses steam to preheat incoming water. The dishwasher is equipped with a washing basin and an equipment box. A spray box, a spray pump, a main wash pump, and a drainage pump are installed in the equipment box.

[0005] A removable waterproof cover is provided above the wash basin, a rotatable spray arm is installed in the waterproof cover, a recessed main wash sink is provided at the bottom of one side of the wash basin, a preheated water tank is fixed in the waterproof cover and is located directly above the main wash sink, the main wash sink is provided with a circulating water outlet and a waste water outlet, the circulating water outlet is connected to the spray arm through the main wash pump, and the waste water outlet is discharged to the sewer through the drainage pump;

[0006] The dishwasher is provided with two main water inlet pipes connected to the city water, and each of the two main water inlet pipes is provided with a water inlet solenoid valve, wherein:

[0007] The first main water inlet pipe is a low-temperature main wash pipe directly connected to the spray arm.

[0008] The second water inlet pipe is a high-temperature main wash pipeline, which is connected to the preheating water tank water inlet on one side of the preheating water tank. The water in the preheating water tank flows in a circuitous manner and is transported to the spray box. The spray box water outlet is connected to the spray arm through a spray pump.

[0009] Furthermore, a temperature sensor and a liquid level gauge are provided in the main wash water tank and the spray box;

[0010] When the water temperature in the main wash water tank or the spray box is lower than the respective preset temperatures, the heater in the main wash water tank or the spray box is started.

[0011] Furthermore, the top cover of the spray box is connected to a steam exhaust pipeline, and the other end opening of the steam exhaust pipeline is arranged in the waterproof cover.

[0012] Furthermore, a coil is installed in the upper part of the spray box and is always located above the liquid level. One end of the coil is connected to the water outlet of the preheated water tank through a pipeline.

[0013] Furthermore, a drying agent inlet and a detergent inlet are provided on the side of the equipment box, and the drying agent inlet and the detergent inlet are connected to the spray box and the main washing water tank respectively through piston pumps.

[0014] Furthermore, the dishwasher is equipped with a city water inlet, the two main water inlet pipes are connected to the city water inlet via a three-way valve, and a flow meter is installed between the city water inlet and the three-way valve.

[0015] Furthermore, the washing basin is installed on the top of the equipment box, the drainage pump is fixed on the bottom plate of the equipment box and is connected to the wastewater drain outlet through a sewage pipe, and the drainage outlet of the drainage pump is connected to the sewer through an anti-siphon sewage pipe, and the anti-siphon sewage pipe is an upward arched U-shaped pipe.

[0016] Furthermore, the preheating water tank is provided with spaced partitions to form a circuitous flow channel in the preheating water tank; or

[0017] The preheating water tank is a circuitous heat pipe.

[0018] Furthermore, the spray arm is composed of two lower hollow wash arms coaxially mounted in the wash basin and two upper hollow wash arms coaxially mounted on the lower surface of the preheated water tank;

[0019] Inclined water spray ports are respectively arranged on the upper surface of the lower hollow wash arm and the lower surface of the upper hollow wash arm.

[0020] The advantages of the present invention are:

[0021] (1) The present invention sets a preheating water tank just above the water tank. The city water passes through the preheating water tank and then enters the spray box for heating. The high-temperature steam during the high-temperature washing process can preheat the water in the preheating water tank, thereby increasing the inlet water temperature, which is beneficial to reducing the energy consumption required for heating the dishwasher;

[0022] (2) The high-temperature steam in the spray box is discharged into the waterproof cover through the steam discharge pipeline, which can provide an auxiliary heat source for heating the preheating water tank;

[0023] (3) The preheating water tank has a circuitous flow channel, which can improve the preheating efficiency;

[0024] (4) A coil located above the liquid level is set in the top space of the spray box. On the one hand, the high-temperature steam in the spray box can be used to reheat the incoming water. At the same time, it can also play a role in lowering the water temperature in the upper layer of the spray box, making the water temperature in the upper and lower layers of the spray box more uniform, thereby more accurately controlling the outlet water temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 A perspective view of the waterproof cover of the commercial energy-saving dishwasher of the present invention in a closed state;

[0027] Figure 2 for Figure 1 Schematic diagram showing the sink with the waterproof cover hidden;

[0028] Figure 3 for Figure 2 A stereogram from another perspective;

[0029] Figure 4 Shows a schematic diagram of the internal structure of the equipment box;

[0030] Figure 5 for Figure 4 Schematic diagram of the internal structure of the equipment box behind the hidden control cabinet;

[0031] Figure 6 Shows the piping connection diagram inside the equipment box;

[0032] Figure 7 The diagram shows the piping connections inside the equipment box from a rear projection perspective.

[0033] Figure 8 This is a partial enlarged view of the interior of the equipment box;

[0034] Figure 9 This is a schematic diagram of a spray box with coils and heaters inside;

[0035] Figure 10 To form a circuitous flow path in the preheating water tank by setting a partition;

[0036] Figure 11 This is a working principle diagram of the present invention. DETAILED DESCRIPTION

[0037] In the following description, numerous specific details are provided to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced without one or more of these details. In other instances, certain technical features well known in the art are not described to avoid confusion with the present invention.

[0038] In order to fully understand the present invention, detailed steps and detailed structures will be presented in the following description to illustrate the technical solution of the present invention. Preferred embodiments of the present invention are described in detail below, but in addition to these detailed descriptions, the present invention may also have other implementations.

[0039] Reference Figure 1 As shown, the present invention provides a commercial energy-saving dishwasher that uses steam to preheat incoming water. The dishwasher is equipped with a washing basin 9 and an equipment box 1. A spray box 14, a spray pump 14-3, a main wash pump 17, a drain pump 16 and a control cabinet 15 are installed in the equipment box 1; a removable waterproof cover 2 is provided above the washing basin 9, a rotatable spray arm is installed in the waterproof cover 2, a recessed main wash sink 10 is provided at the bottom of one side of the washing basin 9, a preheated water tank 12 is fixed in the waterproof cover 2 and is located directly above the main wash sink 10, the main wash sink 10 is equipped with a circulating water outlet and a waste water outlet, the circulating water outlet is connected to the spray arm through the main wash pump 17, and the waste water outlet is discharged to the sewer through the drain pump 16. The dishwasher is provided with two main water inlet pipes connected to the city water, and a water inlet solenoid valve 6-2 and 6-3 are respectively arranged on the two main water inlet pipes. Among them, the first main water inlet pipe 6-5 is a low-temperature main wash pipe directly connected to the spray arm, and the second water inlet pipe 6-6 is a high-temperature main wash pipe. The second water inlet pipe is connected to the water inlet of the preheating water tank 12 on one side of the preheating water tank 12. The water in the preheating water tank 12 flows in a circuitous manner and is then transported to the spray box 14. The water outlet of the spray box 14 is connected to the spray arm through the spray pump 14-3.

[0040] The commercial energy-saving dishwasher provided by this invention effectively utilizes the high-temperature steam generated during the high-temperature washing process. During the washing process, water entering the high-temperature main wash line is not directly delivered to the spray tank 14. Instead, it first passes through the preheated water tank 12 located directly above the wash basin 9. The city water flows within the preheated water tank 12 and absorbs heat from the high-temperature steam. The circuitous flow path within the preheated water tank 12 allows the water to more fully absorb the heat from the steam, resulting in a better warming effect. Finally, the water heated by the high-temperature steam flows through the pipeline to the spray tank 14, where it is heated and used as high-temperature washing water. This solution effectively utilizes steam heat, reduces the overall power consumption required for heating the dishwasher, and lowers operating costs.

[0041] In an optional embodiment, temperature sensors, liquid level gauges and heaters are provided in the main wash water tank 10 and the spray box 14; when the water temperature in the main wash water tank 10 or the spray box 14 is lower than the respective preset temperatures, the heater in the main wash water tank 10 or the spray box 14 is started.

[0042] In an optional embodiment, if Figure 4 and Figure 6 The top surface of the spray box 14 is provided with a steam exhaust pipe 14-2, and the other end of the steam exhaust pipe 14-2 is opened and connected to the waterproof cover 2. The spray box 14 is not filled with water, and a certain amount of space is reserved at the top to prevent the water from being too full and expanding after heating, causing the spray box 14 to deform and rupture. Therefore, when the heater is heating, the space at the top will be filled with hot steam. If it is not discharged in time, the internal pressure of the spray box 14 will increase, affecting the structural stability of the spray box 14. We discharge the hot steam in the spray box 14 through the steam exhaust port 14-6 into the waterproof cover 2 through the steam exhaust pipe 14-2. On the one hand, it balances the internal pressure of the spray box 14. On the other hand, the steam discharged from the spray box 14 enters the waterproof cover 2 and can be used as a heat source for preheating the water tank 12, further improving the heating efficiency and reducing energy consumption.

[0043] More preferably, Figure 8-9 As shown, a coil 14-4 is fixedly mounted above the liquid level in the spray tank 14. One end of the coil 14-4 is connected to the outlet of the preheated water tank 12 via a pipeline. When the heater 14-5 in the spray tank 14 is heating, the space above the liquid level in the spray tank 14 is filled with high-temperature steam, causing the water temperature in the upper layer of the spray tank 14 to be significantly higher than that in the lower layer. This uneven water temperature affects the outlet temperature of the water ultimately delivered to the spray arms. A coil 14-4, elevated above the liquid level, is installed within the spray box 14. One end of the coil 14-4 is connected to the preheated water tank outlet pipe 12-1 via a port 14-4a. Water output from the preheated water tank 12 flows through the coil 14-4 in a circuitous manner before entering the spray box 14. This lowers the upper water temperature within the spray box 14, making the overall water temperature within the spray box 14 more uniform. Furthermore, the water flowing within the coil 14-4 absorbs high-temperature steam from the upper portion of the spray box 14, further increasing its temperature and raising the inlet water temperature, further reducing energy consumption. Preferably, the coil 14-4 is a spiral coil or a circuitous coil.

[0044] In an optional embodiment, a drying agent inlet 7 and a detergent inlet 8 are provided on the side of the equipment box 1. Outside the equipment box 1, the drying agent inlet 7 and the detergent inlet 8 are connected to the drying agent storage device and the detergent storage device, respectively. Inside the equipment box 1, the drying agent inlet 7 and the detergent inlet 8 are connected to the spray box 14 and the main wash sink 10 respectively via the drying agent piston pump 7-1 and the detergent piston pump 8-1. When the washing process enters the last step, the drying agent piston pump 7-1 automatically pumps the drying agent into the spray box 14, where it dissolves in the water. After washing the dishes in the clean water containing the drying agent, they dry faster.

[0045] In an optional embodiment, the dishwasher is equipped with a city water inlet 6, two main water inlet pipes are connected to the city water inlet 6 through a three-way valve 6-2, and a flow meter 6-1 is installed between the city water inlet 6 and the three-way valve 6-2.

[0046] In an alternative embodiment, the wash basin 9 is mounted on the top of the equipment box 1. A drain pump 16 is fixed to the bottom plate of the equipment box 1 and connected to the wastewater outlet via a drain pipe 16-1. The drain outlet of the drain pump 16 is connected to the sewer via an anti-siphon drain pipe 16-2. The anti-siphon drain pipe 16-2 is an upwardly arched U-shaped pipe 16-2, and its highest point is located above the height of the wash basin 9. The anti-siphon drain pipe 16-2 can prevent sewage from overflowing from the sewer outlet at the moment of drainage.

[0047] In an optional embodiment, if Figure 2 and Figure 10 As shown, the preheating water tank inlet pipe 12-2 is connected to one side of the preheating water tank 12, and the preheating water tank outlet pipe 12-1 is located on the other side of the preheating water tank 12. Spaced partitions 12-3 are provided within the preheating water tank 12 to form a circuitous flow path within the preheating water tank 12. The arrow in the figure indicates the direction of water flow. Preferably, the preheating water tank 12 is a plate-type water tank with an inclined lower surface. This has the advantage of allowing condensed steam droplets on the lower surface of the plate-type water tank to naturally drip down under the action of gravity, preventing the lower surface of the plate-type water tank from being covered with water droplets, which would affect the heat exchange efficiency between the steam and the preheating water tank 12. In another optional embodiment, the preheating water tank 12 can also be a circuitous heat pipe.

[0048] In an optional embodiment, the spray arm consists of two lower hollow wash arms 11 coaxially mounted within the wash basin 9 and two upper hollow wash arms 13 coaxially mounted on the lower surface of the preheated water tank 12; inclined water spray outlets are arranged on the upper surface of the lower hollow wash arms 11 and the lower surface of the upper hollow wash arms 13. When water enters the spray arm and is sprayed out from the inclined water spray outlet, the wash arm is subjected to a reaction force and rotates horizontally, which improves the cleaning effect. Figure 7As shown, the main wash pump 17 pumps the water in the main wash tank 10 into the upper hollow wash arm 13 through the main wash outlet pipe 17-1, and the spray box 14 pumps hot water into the upper hollow wash arm 13 through the spray outlet pipe 14-4.

[0049] The above describes the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the above-mentioned specific embodiments, and the devices and structures that are not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can use the above-mentioned disclosed methods and technical contents to make many possible changes and modifications to the technical solutions of the present invention without departing from the scope of the technical solutions of the present invention, or modify them into equivalent embodiments of equivalent changes, which does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention that do not depart from the content of the technical solutions of the present invention are still within the scope of protection of the technical solutions of the present invention.

Claims

1. A commercial energy-saving dishwasher that uses steam to preheat water, characterized in that: The dishwasher is equipped with a washing basin (9) and an equipment box (1), wherein a spray box (14), a spray pump (14-3), a main wash pump (17) and a drain pump (16) are installed in the equipment box (1); A cover-type waterproof cover (2) is provided above the washing basin (9), a rotatable spray arm is installed in the waterproof cover (2), a concave main washing sink (10) is provided at the bottom of one side of the washing basin (9), a preheated water tank (12) is fixed in the waterproof cover (2) and is located directly above the main washing sink (10), the main washing sink (10) is provided with a circulating water outlet and a waste water outlet, the circulating water outlet is connected to the spray arm through the main washing pump (17), and the waste water outlet is discharged to the sewer through the drainage pump (16); The dishwasher is provided with two main water inlet pipes connected to the city water, and each of the two main water inlet pipes is provided with a water inlet solenoid valve, wherein: The first main water inlet pipe (6-5) is a low-temperature main washing pipeline directly connected to the spray arm. The second water inlet pipe (6-6) is a high-temperature main washing pipe, and the second water inlet pipe is connected to the water inlet of the preheating water tank (12) on one side of the preheating water tank (12). The water in the preheating water tank (12) flows in a circuitous manner and is then transported to the spray box (14). The water outlet of the spray box (14) is connected to the spray arm through a spray pump (14-3); The top cover of the spray box (14) is connected to a steam exhaust pipe (14-2), and the other end of the steam exhaust pipe (14-2) is opened in the waterproof cover (2); a coil (14-4) is installed in the upper part of the spray box (14) and is always located above the liquid level. One end of the coil (14-4) is connected to the water outlet of the preheating water tank (12) through a pipe; A temperature sensor, a liquid level meter and a heater are provided in the main wash water tank (10) and the spray box (14); when the water temperature in the main wash water tank (10) or the spray box (14) is lower than the respective preset temperatures, the heater in the main wash water tank (10) or the spray box (14) is started.

2. The commercial energy-saving dishwasher according to claim 1, characterized in that: A drying agent inlet (7) and a detergent inlet (8) are provided on the side of the equipment box (1); the drying agent inlet (7) and the detergent inlet (8) are connected to the spray box (14) and the main washing water tank (10) respectively through piston pumps.

3. The commercial energy-saving dishwasher according to claim 1, characterized in that: The dishwasher is equipped with a city water inlet (6), the two main water inlet pipes are connected to the city water inlet (6) via a three-way valve (6-2), and a flow meter (6-1) is installed between the city water inlet (6) and the three-way valve (6-2).

4. The commercial energy-saving dishwasher according to claim 1, characterized in that: The washing basin (9) is installed on the top of the equipment box (1), the drainage pump (16) is fixed on the bottom plate of the equipment box (1) and is connected to the wastewater outlet via a sewage pipe (16-1), and the drainage outlet of the drainage pump (16) is connected to the sewer via an anti-siphon sewage pipe (16-2), and the anti-siphon sewage pipe (16-2) is an upwardly arched U-shaped pipe.

5. The commercial energy-saving dishwasher according to claim 1, characterized in that: The preheating water tank (12) is provided with spaced partitions (12-3) to form a circuitous flow channel in the preheating water tank (12); or The preheating water tank (12) is a circuitous heat pipe.

6. The commercial energy-saving dishwasher according to claim 1, characterized in that: The spray arm is composed of two lower hollow wash arms (11) coaxially mounted in the washing basin (9) and two upper hollow wash arms (13) coaxially mounted on the lower surface of the preheated water tank (12); Inclined water spray ports are respectively arranged on the upper surface of the lower hollow washing arm (11) and the lower surface of the upper hollow washing arm (13).

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