Commercial dish-washing machine with damp and hot steam heat recovery function

Abstract

The utility model provides a commercial dish-washing machine with a damp and hot steam heat recovery function, and belongs to the technical field of commercial dish-washing machines. The problems that an existing commercial dish-washing machine is high in energy consumption, and the environment is humid and hot due to steam discharge are solved. According to the commercial dish-washing machine, the inner cavity for steam suction is additionally designed above the cleaning cavity, and the coil heat exchanger and the heat pump assembly are installed in the inner cavity, so that step-by-step cooling and condensation of high-temperature steam and step-by-step heating of normal-temperature water are achieved; according to the dish-washing machine, the heating bag is arranged in the dish-washing machine, heated water obtained through heat exchange is connected into the heating bag to be further heated, and then the heated water is introduced into the dish-washing machine to be used for cleaning, so that the energy consumption of the dish-washing machine is greatly reduced, meanwhile, damp and hot steam can be completely condensed, and the influence on the environment is effectively reduced.

Description

Technical Field

[0001] This utility model belongs to the field of commercial dishwasher technology, and relates to a commercial dishwasher, and more particularly to a commercial dishwasher with humid heat steam heat recovery. Background Technology

[0002] Large commercial dishwashers are typically humid and hot. Therefore, it is necessary to add air source heat pumps or other heat exchangers to commercial dishwashers to recover heat from the humid steam and condense the steam, thereby effectively reducing steam emissions from commercial dishwashers and improving the humid and hot operating environment of the dishwasher.

[0003] However, since the hot steam generated by large commercial dishwashers during use can reach temperatures of 50 to 70°C, while the most efficient operating temperature for conventional air-source heat pumps is around 40°C, directly drawing in the steam generated by commercial dishwashers for heat exchange and condensation would result in low heat recovery efficiency and adversely affect the operation of the heat pump. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a commercial dishwasher with humid heat steam heat recovery. It solves the technical problems of high energy consumption and humid heat caused by steam emissions in existing commercial dishwashers.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A commercial dishwasher with humid heat steam heat recovery includes a housing with a cleaning chamber and a heating pack. The top of the housing has an inner chamber with a steam intake near the cleaning chamber. A heat pump fan is installed on the top of the inner chamber. The dishwasher is characterized by a coil heat exchanger installed within the inner chamber. The heat pump assembly also includes a heat pump evaporator installed within the inner chamber and above the coil heat exchanger. A room temperature water inlet pipe is connected to the coil heat exchanger, and the outlet of the coil heat exchanger is connected via a pipe to the inlet of a heat exchange tank on the heat pump assembly. The outlet of the heat exchange tank is connected via a pipe to the heating pack.

[0007] This commercial dishwasher features an additional steam intake chamber above the washing chamber. A coil heat exchanger and heat pump assembly are installed in this chamber to progressively cool and condense the high-temperature steam and progressively heat the room-temperature water. The heated water from the heat exchange is then fed into a heating element for further heating before being introduced into the dishwasher for washing. This design significantly reduces the dishwasher's energy consumption, while also ensuring that the hot, humid steam is condensed more completely, effectively minimizing environmental impact.

[0008] Specific innovations are as follows: high-temperature steam is sucked into the inner chamber after coming out of the cleaning cavity, first passes through the coil heat exchanger for first heat exchange and cooling and condensation, then the steam continues to go up to the heat pump evaporator, the low temperature of the surface of the heat pump evaporator can reduce the temperature of the steam to normal temperature or below, after cooling, the airflow is discharged by the heat pump fan, the discharged gas is low in temperature and dry, and will not affect the environment;

[0009] At the same time, normal-temperature water is connected to the coil heat exchanger and heated to about 40 DEG C by first heat exchange with steam, then the heated water is further connected to the heat exchange barrel for second heating to about 70 DEG C, then the second heated water is connected to the heating bag and only needs to be slightly heated to reach the required 82 DEG C working water temperature of the dishwasher, so that the heating is more efficient and the required energy consumption is greatly reduced, and the energy consumption of the overall commercial dishwasher is greatly reduced.

[0010] In the commercial dishwasher with wet hot steam heat recovery, the cleaning cavity on the shell has a side opening inlet and outlet, and the steam suction inlet has two and is located above the inlet and outlet.

[0011] The steam suction inlet of the present application is arranged above the inlet and outlet of the cleaning cavity, so that the high-temperature steam escaping from the inlet and outlet can be directly sucked into the inner chamber for heat exchange, which can further reduce energy consumption and reduce the influence of hot steam on the environment.

[0012] In the commercial dishwasher with wet hot steam heat recovery, the coil heat exchanger is arranged in the inner chamber between the steam suction inlet and the heat pump fan and divides the inner chamber into an upper chamber and a lower chamber, and the heat pump evaporator is installed in the upper chamber.

[0013] The coil heat exchanger of the present application divides the inner chamber into an upper chamber and a lower chamber, so that the hot steam can fully contact the coil heat exchanger if it wants to spread upward, which can improve the heat exchange efficiency.

[0014] In the commercial dishwasher with wet hot steam heat recovery, the coil heat exchanger includes double-layer arranged heat exchange coils.

[0015] The coil heat exchanger of the present application is a double-layer structure, which can further improve the heat exchange efficiency and reduce the energy consumption.

[0016] In the commercial dishwasher with wet hot steam heat recovery, the condenser pipe of the heat pump evaporator is a double-layer structure and each layer of the condenser pipe is laid flat on the inner side of the inner chamber.

[0017] The heat pump evaporator of the application is also a double-layer structure, and each layer is uniformly laid in the inner chamber to block the upper and lower parts, can fully contact with steam to perform heat exchange, and reduce energy consumption.

[0018] In the commercial dishwasher with wet hot steam heat recovery, the heat pump assembly further comprises a heat pump compressor connected with the heat pump evaporator and the heat exchange barrel respectively for heat exchange, and the heat pump compressor and the heat exchange barrel are both installed on the top outer side of the shell.

[0019] The heat pump compressor and the heat exchange barrel of the heat pump assembly of the application are both installed on the outer side of the shell, and since the heat exchange object is hot steam, the installation positions of the two are spaced apart from the position of the heat pump evaporator, so that the steam erosion can be effectively avoided, and the service life is effectively prolonged.

[0020] In the commercial dishwasher with wet hot steam heat recovery, the heating bag has a water outlet connected with the spray pipe of the commercial dishwasher through a pipeline.

[0021] The heating bag of the application is directly connected with the spray pipe of the dishwasher, so that the temperature of the water heated through multiple stages of heating can be further increased to be output for spraying, thereby improving the water output efficiency and greatly reducing the energy consumption.

[0022] In the commercial dishwasher with wet hot steam heat recovery, the commercial dishwasher further comprises a water storage tank installed below the cleaning cavity, and the water storage tank is connected with the normal-temperature water inlet pipe and the water inlet pipe of the water storage tank is arranged at a position close to the bottom of the cleaning cavity.

[0023] The commercial dishwasher further comprises a water storage tank for storing a certain amount of normal-temperature water to stably supply the coil heat exchanger, and the water inlet pipe of the water storage tank is arranged along the bottom of the shell where the cleaning cavity is located, so that the normal-temperature water can absorb part of the heat dissipated from the bottom of the shell during the conveying process and be preliminarily heated, and the slight temperature difference can facilitate the coil heat exchanger to rapidly increase the temperature to meet the subsequent heating requirement.

[0024] The commercial dishwasher has the following beneficial effects: the steam suction inner chamber is additionally designed above the cleaning cavity, the coil heat exchanger and the heat pump assembly are installed in the inner chamber to realize the step-by-step cooling and condensation of high-temperature steam and the step-by-step heating of normal-temperature water, the heated water obtained through heat exchange is connected into the heating bag for further heating and then is introduced into the dishwasher for cleaning, and the design can greatly reduce the energy consumption of the dishwasher, and the wet hot steam can be completely condensed, thereby effectively reducing the influence on the environment. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The utility model discloses a structure schematic drawing.

[0026] In the drawing: 1, shell, 11, cleaning cavity, 12, steam suction port, 13, inner chamber, 2, heating bag, 3, heat pump fan, 4, coil heat exchanger, 5, heat pump assembly, 51, heat pump evaporator, 52, heat exchange barrel, 53, heat pump compressor, 6, water storage tank, 7, normal temperature water inlet pipe. DETAILED DESCRIPTION

[0027] As Figure 1The commercial dishwasher with wet hot steam heat recovery shown includes a shell 1 with a cleaning cavity 11 and a heating bag 2, and a spray assembly is arranged in the cleaning cavity 11, which mainly includes a spray arm and a water pipeline, the water pipeline is connected with the heating bag 2, the water heated by the heating bag 2 is output to the spray arm for spraying cleaning, and the water temperature of the spray arm is usually about 80℃. The top of the shell 1 is provided with an inner chamber 13, the inner chamber 13 is provided with a steam suction port 12 near the cleaning cavity 11, the top of the inner chamber 13 is provided with a heat pump fan 3, and a coil heat exchanger 4 is arranged in the inner chamber 13, the coil heat exchanger 4 is a mature technology and will not be described in detail here, and the coil heat exchanger 4 mainly includes a relatively long pipeline, the pipeline is in a spiral state with a certain shape, and the water flowing in the pipeline can be heated by heat exchange with a high-temperature cutoff. The commercial dishwasher further includes a heat pump assembly 5, the heat pump evaporator 51 of the heat pump assembly 5 is arranged in the inner chamber 13 and located above the coil heat exchanger 4, the coil heat exchanger 4 is connected with a normal-temperature water inlet pipe 7, and the water outlet of the coil heat exchanger 4 is connected with the water inlet of the heat exchange barrel 52 on the heat pump assembly 5 through a pipeline, and the water outlet of the heat exchange barrel 52 is connected with the heating bag 2 through a pipeline. The commercial dishwasher is additionally designed with the inner chamber 13 for steam suction above the cleaning cavity 11, the coil heat exchanger 4 and the heat pump assembly 5 are arranged in the inner chamber 13 to realize step-by-step cooling and condensation of high-temperature steam and step-by-step heating of normal-temperature water, and the heated water obtained by heat exchange is input into the heating bag 2 for further heating and then input into the dishwasher for cleaning. The design can greatly reduce the energy consumption of the dishwasher, and the wet hot steam can be completely condensed, effectively reducing the influence on the environment. The specific innovations are as follows: the high-temperature steam is sucked into the inner chamber 13 from the cleaning cavity 11, firstly undergoes first heat exchange and cooling in the coil heat exchanger 4, then continues to move upward to the heat pump evaporator 51, the low-temperature surface of the heat pump evaporator 51 can reduce the temperature of the steam to normal temperature or below, the water vapor is condensed after being cooled, and the airflow is discharged by the heat pump fan 3, the discharged gas is low in temperature and dry, and does not affect the environment; at the same time, the normal-temperature water is input into the coil heat exchanger 4 and heated to about 40℃ by first heat exchange with the steam, then the heated water is further input into the heat exchange barrel 52 for second heating to about 70℃, and then the twice-heated water is input into the heating bag 2 and only needs to be slightly heated to reach the required 82℃ working water temperature of the dishwasher, so that the heating is more efficient and the energy consumption is greatly reduced compared with directly inputting normal-temperature water for heating, thereby greatly reducing the energy consumption of the overall commercial dishwasher.

[0028] Further, the cleaning cavity 11 on the shell 1 has a side opening inlet and outlet, and the steam suction inlet 12 has two and is located above the inlet and outlet respectively. The steam suction inlet 12 of the present application is arranged above the inlet and outlet of the cleaning cavity 11, so that the high-temperature steam escaping from the inlet and outlet can be directly sucked into the inner chamber 13 by the steam suction inlet 12 for heat exchange, which can further reduce energy consumption and reduce the impact of hot steam on the environment.

[0029] Further, the coil heat exchanger 4 is distributed in the inner chamber 13 between the steam suction inlet 12 and the heat pump fan 3 and separates the inner chamber 13 into an upper chamber and a lower chamber, and the heat pump evaporator 51 is installed in the upper chamber. The coil heat exchanger 4 of the present application separates the inner chamber 13 into two chambers, so that the hot steam can be fully contacted with the coil heat exchanger 4 when it wants to diffuse upward, which can improve the heat exchange efficiency. Preferably, the coil heat exchanger 4 includes double-layer arranged heat exchange coils. The coil heat exchanger 4 of the present application is a double-layer structure, which can further improve the heat exchange efficiency and reduce energy consumption. Preferably, the condenser pipe of the heat pump evaporator 51 is a double-layer structure, and each layer of the condenser pipe is laid flat on the inner side of the inner chamber 13. The heat pump evaporator 51 of the present application is also a double-layer structure, and each layer is evenly laid flat in the inner chamber 13 to block the upper and lower chambers, which can be fully contacted with the steam for heat exchange and reduce energy consumption.

[0030] Further, the heat pump assembly 5 mainly includes a heat pump compressor 53, a heat exchange barrel 52 and a heat pump evaporator 51, and the heat pump assembly 5 is a mature technology and will not be described in detail. The heat pump compressor 53 is connected with the heat pump evaporator 51 and the heat exchange barrel 52 for heat exchange, and the heat pump compressor 53 and the heat exchange barrel 52 are installed on the top outside of the shell 1. The heat pump compressor 53 and the heat exchange barrel 52 of the heat pump assembly 5 of the present application are installed on the outside of the shell 1, and since the heat exchange object is hot steam, the installation positions of the two are spaced apart from the position of the heat pump evaporator 51 to effectively avoid being eroded by the steam and effectively improve the service life.

[0031] Further, the heating bag 2 has a water outlet, and the water outlet is connected with the spray pipe of the commercial dishwasher through a pipeline. The heating bag 2 of the present application is directly connected with the spray pipe of the dishwasher, so that the temperature of the water that has been heated multiple times and step by step into the heating bag 2 only needs to be further heated to be output for spraying, which can improve the water output efficiency and greatly reduce the energy consumption.

[0032] Further, the commercial dishwasher further comprises a water storage tank 6, which is installed below the cleaning cavity 11, the water storage tank 6 is connected with the normal-temperature water inlet pipe 7, and the water inlet pipe of the water storage tank 6 is arranged at a position close to the bottom of the cleaning cavity 11. The commercial dishwasher further comprises a water storage tank 6, which is used for accumulating a certain amount of normal-temperature water to stably supply the coil heat exchanger 4, and the water inlet pipe of the water storage tank 6 is arranged along the bottom of the shell 1 where the cleaning cavity 11 is located. In this way, the normal-temperature water can absorb part of the heat dissipated from the bottom of the shell 1 during the conveying process and be preliminarily heated, so that the slight temperature difference can facilitate the coil heat exchanger 4 to rapidly increase the temperature and meet the subsequent heating demand.

[0033] In the description of the present application, it should be explained that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the present application, at the same time, the basic principle, main features and advantages of the present application are shown and described above, which should be understood by those skilled in the art.

Claims

1. A commercial dishwasher with wet heat steam heat recovery, comprising a shell (1) with a cleaning cavity (11) and a heating bag (2), the top of the shell (1) is provided with an inner chamber (13), the inner chamber (13) is provided with a steam suction port (12) near the cleaning cavity (11), the top of the inner chamber (13) is provided with a heat pump fan (3), characterized in that, The inner chamber (13) is provided with a coil heat exchanger (4), and the commercial dishwasher further comprises a heat pump assembly (5), wherein a heat pump evaporator (51) of the heat pump assembly (5) is arranged in the inner chamber (13) and above the coil heat exchanger (4), the coil heat exchanger (4) is connected with a normal-temperature water inlet pipe (7), and a water outlet of the coil heat exchanger (4) is connected with a water inlet of a heat exchange barrel (52) of the heat pump assembly (5) through a pipeline, and a water outlet of the heat exchange barrel (52) is connected with the heating bag (2).

2. A commercial dishwasher with heat recovery of wet heat steam according to claim 1, characterized in that, The cleaning cavity (11) of the shell (1) is provided with a lateral inlet and a lateral outlet, and the steam suction inlet (12) is provided with two steam suction inlets which are arranged above the inlet and the outlet respectively.

3. A commercial dishwasher with heat recovery of wet heat vapour according to claim 2, characterized in that, The coil heat exchanger (4) is arranged in the inner chamber (13) between the steam suction inlet (12) and the heat pump fan (3) and divides the inner chamber (13) into an upper chamber and a lower chamber, and the heat pump evaporator (51) is arranged in the upper chamber.

4. A commercial dishwasher with heat recovery of wet heat steam according to claim 1 or 2 or 3, characterized in that, The coil heat exchanger (4) comprises double-layer heat exchange coils.

5. A commercial dishwasher with heat recovery of wet heat steam according to claim 1 or 2 or 3, characterized in that, The condenser pipe of the heat pump evaporator (51) is of a double-layer structure, and each layer of the condenser pipe is laid flat on the inner side of the inner chamber (13).

6. A commercial dishwasher with heat recovery of wet heat steam according to claim 1 or 2 or 3, characterized in that, The heat pump assembly (5) further comprises a heat pump compressor (53), the heat pump compressor (53) is connected with the heat pump evaporator (51) and the heat exchange barrel (52) respectively for heat exchange, and the heat pump compressor (53) and the heat exchange barrel (52) are both arranged on the outer side of the top of the shell (1).

7. A commercial dishwasher with heat recovery of wet heat vapour according to claim 6, characterized in that, The heating bag (2) is provided with a water outlet, and the water outlet is connected with a spray pipe of the commercial dishwasher through a pipeline.

8. A commercial dishwasher with heat recovery of wet heat vapour according to claim 7, characterized in that, The commercial dishwasher further comprises a water storage tank (6), the water storage tank (6) is arranged below the cleaning cavity (11), the water storage tank (6) is connected with the normal-temperature water inlet pipe (7), and a water inlet pipe of the water storage tank (6) is arranged close to the bottom of the cleaning cavity (11).

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