Waste heat recovery water curtain cooling equipment

Abstract

The invention belongs to the technical field of waste heat recovery, and particularly relates to waste heat recovery water curtain cooling equipment which comprises a shell and an air duct formed in the shell, the air duct comprises an air inlet cavity, a hot air cavity and a cold air cavity which are sequentially isolated from one another, and hot air in air is sucked into the air inlet cavity through a fan; an air suction port of the fan communicates with the air inlet cavity, and an air outlet of the fan communicates with the hot air cavity and faces the upper wall face of the shell; the hot air cavity and the cold air cavity are isolated through an evaporator, a water curtain cooling assembly is arranged in the hot air cavity in front of the evaporator, and ventilation holes are formed in the shell at the cold air cavity. The water curtain cooling assembly comprises a circulating water pipe and a circulating pump connected to the circulating water pipe, and the circulating water pipe circularly absorbs water from the bottom of the hot air cavity to preliminarily cool the hot air. The water curtain cooling assembly is arranged in front of the evaporator, it is guaranteed that hot air with water vapor is condensed after passing through the evaporator, air blown out of the ventilation holes is relatively dry and comfortable, mist in the decontamination room is kept as little as possible, and the working environment of the decontamination room is improved.

Description

Technical Field

[0001] This invention belongs to the field of waste heat recovery technology, specifically relating to a waste heat recovery water curtain cooling device and a dishwasher. Background Technology

[0002] Dishwashers or sterilizers are installed in the washing and sterilization room. Since the equipment generates a lot of heat during operation, the heat can be recovered by the waste heat recovery equipment to heat the water, while the fan blows out cold air.

[0003] The applicant's previous generation of waste heat recovery equipment placed the evaporator, condenser, expansion valve, heat exchanger, water tank, and fan in the same cavity. The water in the tank was heated by heat exchange with hot air collected from the inlet and outlet of the dishwasher. After passing through the evaporator, the hot air became cold air. This cold air mixed into the cavity, which was detrimental to the heat preservation of the water in the tank. At the same time, the cold air mixed with the heat generated by the compressor, heat exchanger, and elevated water tank in the cavity, causing the temperature of the air blown out by the fan to rise, failing to reach the required indoor cooling temperature.

[0004] In the waste heat recovery process, the flow velocity and direction of the airflow as it passes through the evaporator are key factors affecting heat recovery efficiency. If the airflow passes through the evaporator perpendicularly in the same direction, the heat recovery efficiency will be relatively low due to the high speed. In existing technologies, the fan is generally located behind the evaporator, drawing hot air into the duct through negative pressure and blowing cold air directly to the outside of the waste heat recovery equipment. Due to the negative pressure, the hot airflow usually flows towards the fan inlet in a similar direction, resulting in low waste heat recovery efficiency. Furthermore, the airflow from the fan outlet is very strong, blowing directly onto the operators inside the room and affecting their comfort.

[0005] Although the cold air after passing through the evaporator is blown into the decontamination room to cool the air, it still does not reach the temperature required for indoor cooling during actual use, resulting in a poor working environment for operators in the hot decontamination room. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of existing technologies, such as low heat recovery efficiency and insufficient cold air temperature to meet the cooling requirements of the washing and disinfection room, and to provide a waste heat recovery water curtain cooling device and dishwasher that can both improve heat recovery efficiency and meet indoor cooling requirements.

[0007] The technical solution adopted by this invention to solve its technical problem is: A waste heat recovery water curtain cooling device is characterized by comprising an outer shell and an air duct formed within the outer shell. The air duct includes an air inlet chamber, a hot air chamber, and a cold air chamber that are sequentially isolated from each other. A fan draws in hot air from the air and sends it into the air inlet chamber. The air inlet of the fan is connected to the air inlet chamber, and the air outlet of the fan is connected to the hot air chamber and faces the upper wall of the outer shell. The hot air chamber and the cold air chamber are isolated by an evaporator. A water curtain cooling component is installed in the hot air chamber before the evaporator, and the outer shell at the cold air chamber has ventilation holes. The water curtain cooling component includes a circulating water pipe and a circulating pump connected to the circulating water pipe. The circulating water pipe circulates water from the bottom of the hot air chamber to initially cool the hot air.

[0008] Furthermore, the bottom of the hot air cavity has a downwardly recessed water storage tank, into which the condensate from the evaporator and the circulating water from the water curtain cooling assembly flow; the bottom end of the circulating water pipe is connected to the water storage tank.

[0009] Furthermore, the water curtain cooling assembly also includes a honeycomb panel and a spray pipe. The spray pipe is connected to the upper end of the circulating water pipe, and a diversion plate is provided at the upper end of the honeycomb panel. The spray pipe is located within the triangular space formed by the diversion plate and the honeycomb panel.

[0010] Furthermore, the fan is installed inside the air inlet cavity.

[0011] Furthermore, an isolation cavity is formed inside the outer casing, which is isolated from the cold air cavity. The isolation cavity is equipped with a compressor, a heat exchanger, and a water tank that are connected to the evaporator.

[0012] Furthermore, air ducts are symmetrically arranged on the left and right sides of the outer shell, and the isolation cavity is located between the cold air ducts of the two air ducts.

[0013] Furthermore, the outer casing of the cold air cavity has ventilation holes on both the upper and front sides.

[0014] Furthermore, the opening of the air inlet cavity faces downwards, and a filter screen is provided at the opening of the air inlet cavity.

[0015] Furthermore, the opening of the air inlet cavity faces the left / right side wall of the outer casing, and an L-shaped extended air duct is connected to the opening side of the air inlet cavity. The L-shaped extended air duct includes a vertical air duct and a horizontal air duct. The end of the horizontal air duct is connected to the air inlet cavity. The opening of the vertical air duct faces downward, and a filter screen is installed inside the vertical air duct.

[0016] Furthermore, the filter screen is installed at an angle by being pulled out from the side wall of the housing into the air inlet cavity.

[0017] The beneficial effects of the waste heat recovery water curtain cooling device of the present invention are: 1. This invention positions the fan outlet in front of the water curtain cooling assembly and the evaporator, blowing air upwards. The upward hot airflow is evenly dispersed upon encountering the top surface of the outer casing, resulting in initial cooling of the hot airflow as it passes through the water curtain cooling assembly. This also allows for more disordered airflow, increasing the contact area with the evaporator and improving its heat exchange efficiency. After initial cooling by the water curtain cooling assembly, the required temperature for the decontamination room is achieved. Placing the water curtain cooling assembly in front of the evaporator ensures that the hot air containing moisture is condensed after passing through the evaporator, resulting in relatively dry air blowing out of the ventilation holes, minimizing mist in the decontamination room and improving the working environment.

[0018] 2. This invention places the fan in front of the evaporator, thus abandoning the traditional direct blowing method of the fan. After the airflow reaches the cold air chamber, it is naturally blown out from the ventilation hole by the compression of the new airflow drawn in by the fan in front. The cold air is no longer blown directly towards the operator in the decontamination room, improving the comfort of the operator in the decontamination room environment.

[0019] 3. This invention places the water tank, heat exchanger, etc., in an isolation chamber isolated from the air duct, and ensures that the cold air formed after the hot air passes through the evaporator in the air duct is directly blown out by the fan, avoiding the mixing of cold air with the hot air in the isolation chamber, thereby ensuring the heat preservation effect of the hot water in the water tank. The fan directly draws the cold air from the cold air chamber and blows it into the disinfection room, where the cold air temperature is the lowest, effectively cooling the room. Attached Figure Description

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] Figure 1 This is a schematic diagram of the default left front door panel of the waste heat recovery water curtain cooling device in Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the default portion of the housing of the waste heat recovery water curtain cooling device according to Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the default portion of the housing of the waste heat recovery water curtain cooling device according to Embodiment 2 of the present invention; Figure 4 This is a schematic diagram of the waste heat recovery water curtain cooling device of Embodiment 2 of the present invention installed on a dishwasher.

[0022] In the diagram: 1. Evaporator, 2. Air duct, 21. Air inlet chamber, 22. Hot air chamber, 23. Cold air chamber, 3. Isolation chamber, 4. Fan, 41. Air intake, 42. Air outlet, 5. Water tank, 6. L-shaped extended air duct, 61. Vertical air duct, 62. Horizontal air duct, 7. Compressor, 8. Outer casing, 81. Ventilation hole, 9. Water curtain cooling component, 91. Circulating water pipe, 92. Circulating pump, 93. Honeycomb panel, 94. Spray pipe, 95. Drainage plate, 10. Filter screen, 12. Dishwasher, 13. Water storage tank. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0024] Example 1 like Figure 1 and 2 The waste heat recovery water curtain cooling device of the present invention shown in Embodiment 1 is illustrated to more clearly show its internal structure. Figure 1 This is a rendering of the left front door panel of the outer shell 8 after it has been left untouched. Figure 2 This is a rendering showing the effect after the left front door panel and part of the upper shell are left as is.

[0025] The waste heat recovery water curtain cooling device includes an outer shell 8 and an air duct 2 formed within the outer shell 8. The air duct 2 includes an air inlet chamber 21, a hot air chamber 22, and a cold air chamber 23 that are sequentially isolated from each other. Hot air is drawn into the air inlet chamber 21 by a fan 4. The air inlet of the fan 4 is connected to the air inlet chamber 21, and the air outlet 42 of the fan 4 is connected to the hot air chamber 22 and faces the upper wall of the outer shell 8. The hot air chamber 22 and the cold air chamber 23 are isolated by an evaporator 1. A water curtain cooling component 9 is installed in the hot air chamber 22 before the evaporator 1. The outer shell 8 at the cold air chamber 23 has a ventilation hole 81. The water curtain cooling component 9 includes a circulating water pipe 91 and a circulating pump 92 connected to the circulating water pipe 91. The circulating water pipe 91 circulates water from the bottom of the hot air chamber to perform preliminary cooling of the hot air. To prevent condensate from flowing into the air outlet 42 of the fan 4 at the bottom of the hot air chamber 22, the air outlet 42 of the fan 4 should be at a certain height relative to the bottom surface of the hot air chamber 22. The bottom of the hot air chamber 22 has a downwardly recessed water storage tank 13, into which the condensate from the evaporator 1 and the circulating water from the water curtain cooling component 9 flow. The bottom end of the circulating water pipe 91 is connected to the water storage tank 13.

[0026] The water curtain cooling assembly 9 also includes a honeycomb panel 93 and a spray pipe 94. The spray pipe 94 is connected to the upper end of the circulating water pipe 91. A guide plate 95 is provided at the upper end of the honeycomb panel 93. The spray pipe 94 is located in the triangular space formed by the guide plate 95 and the honeycomb panel 93. The spray pipe 94 sprays water directly onto the honeycomb panel 93 for cooling. At the same time, the guide plate 95 ensures that the water does not fall vertically directly, but flows along the honeycomb panel 93 as much as possible into the water storage tank 13 at the bottom of the hot air chamber 22.

[0027] In this embodiment, the fan 4 is disposed inside the air inlet cavity 21. An isolation cavity 3 is also formed inside the outer casing 8, which is isolated from the cold air cavity 23. The isolation cavity 3 is equipped with a compressor 7, a heat exchanger, and a water tank 5 that are connected to the evaporator 1.

[0028] In this embodiment, air ducts 2 are symmetrically arranged on the left and right sides of the outer shell 8, and the isolation cavity 3 is located between the cold air cavity 23 of the two air ducts 2.

[0029] In order to blow out cold air more evenly, ventilation holes 81 are provided on the upper and front sides of the outer shell 8 at the cold air cavity 23.

[0030] In this embodiment, the air inlet chamber 21 has an opening facing downwards, and a filter 10 is installed at the opening inside the air inlet chamber 21. The air inlet chamber 21 is directly opposite the inlet and outlet of the dishwasher 12, making it suitable for small dishwashers that integrate washing and heat recovery.

[0031] In this embodiment, the filter 10 adopts an integrated modular design. A handle is provided at the upper end of the filter 10. The filter 10 is installed into the air inlet cavity 21 by being pulled out from the side wall of the outer shell 8 at an angle.

[0032] The working principle of this invention is as follows: 2. Hot air from the inlet and outlet of the dishwasher 12 is drawn directly into the air intake of the fan 4 and blown vertically upwards onto the upper wall of the outer casing 8 at the top of the hot air chamber 22. The upward hot airflow is evenly dispersed upon encountering the top surface of the outer casing 8, allowing the hot airflow to be initially cooled by the water curtain cooling component 9. This also makes the airflow more disordered, allowing for a larger contact area when passing through the evaporator 1, thus improving the heat exchange efficiency of the evaporator 1. After the initial cooling by the water curtain cooling component 9, the required temperature for the washing and disinfection room can be achieved. Placing the water curtain cooling component 9 in front of the evaporator 1 ensures that the hot air containing moisture is condensed after passing through the evaporator 1, and the air blown out from the ventilation holes is relatively dry, keeping the washing and disinfection room as dry as possible and improving the working environment of the washing and disinfection room.

[0033] This invention places the fan in front of the evaporator 1, thus abandoning the traditional direct blowing method of the fan. After the airflow reaches the cold air cavity, it is naturally blown out from the ventilation hole by the compression of the new airflow drawn in by the fan 4 in front. The cold air is no longer blown directly to the operator in the decontamination room, improving the comfort of the operator in the decontamination room environment.

[0034] The water tank 5, heat exchanger, etc., are placed in the isolation chamber 3, which is isolated from the air duct. This ensures that the cold air formed after the hot air passes through the evaporator 1 in the air duct 2 is directly blown out by the fan, preventing the cold air from mixing with the hot air in the isolation chamber 3, thus guaranteeing the heat preservation effect of the hot water in the water tank. The fan 4 directly draws the cold air from the cold air chamber and blows it into the disinfection room. The cold air has the lowest temperature and can effectively cool the room.

[0035] Example 2 See Figure 3 and Figure 4 This embodiment is more suitable for installation with long-line dishwashers. In this embodiment, the opening of the air inlet cavity 21 faces the left / right side wall of the outer casing 8. An L-shaped extended air duct 6 is connected to the opening side of the air inlet cavity 21. The L-shaped extended air duct 6 includes a vertical air duct 61 and a horizontal air duct 62. The end of the horizontal air duct 62 is connected to the air inlet cavity 21. The opening of the vertical air duct 61 faces downwards, and a filter screen 10 is installed inside the vertical air duct 61. The lower end of the vertical air duct is directly opposite the inlet and outlet ends of the dishwasher 12.

[0036] It should be understood that the specific embodiments described above are for illustrative purposes only and are not intended to limit the scope of the invention. Obvious variations or modifications derived from the spirit of the invention are still within the protection scope of the invention.

Claims

1. A waste heat recovery water curtain cooling device, characterized in that: Includes an outer shell (8) and an air duct (2) formed within the outer shell (8). The air duct (2) includes an air inlet chamber (21), a hot air chamber (22), and a cold air chamber (23) that are sequentially isolated from each other. A fan (4) draws in hot air from the air and sends it into the air inlet chamber (21). The air inlet of the fan (4) is connected to the air inlet chamber (21), and the air outlet (42) of the fan (4) is connected to the hot air chamber (22) and faces the upper wall of the outer shell (8). The air chambers (23) are isolated by an evaporator (1). A water curtain cooling assembly (9) is installed in the hot air chamber (22) in front of the evaporator (1). The outer shell (8) of the cold air chamber (23) has ventilation holes (81). The water curtain cooling assembly (9) includes a circulating water pipe (91) and a circulating pump (92) connected to the circulating water pipe (91). The circulating water pipe (91) circulates water from the bottom of the hot air chamber (22) to initially cool the hot air.

2. The waste heat recovery water curtain cooling device according to claim 1, characterized in that: The bottom of the hot air chamber (22) has a downwardly recessed water storage tank (13), into which the condensate from the evaporator (1) and the circulating water from the water curtain cooling assembly (9) flow; the bottom end of the circulating water pipe (91) is connected to the water storage tank (13).

3. The waste heat recovery water curtain cooling device according to claim 1, characterized in that: The water curtain cooling component (9) also includes a honeycomb plate (93) and a spray pipe (94). The spray pipe (94) is connected to the upper end of the circulating water pipe (91). A diversion plate (95) is provided at the upper end of the honeycomb plate (93). The spray pipe (94) is located in the triangular space formed by the diversion plate (95) and the honeycomb plate (93).

4. The waste heat recovery water curtain cooling device according to claim 1, characterized in that: The fan (4) is installed inside the air inlet cavity (21).

5. The waste heat recovery water curtain cooling device according to claim 1, characterized in that: The outer shell (8) also forms an isolation chamber (3) that is isolated from the cold air chamber (23). The isolation chamber (3) is equipped with a compressor (7), a heat exchanger and a water tank (5) that are connected to the evaporator (1).

6. The waste heat recovery water curtain cooling device according to claim 5, characterized in that: The outer shell (8) is symmetrically provided with air ducts (2) on the left and right sides, and the isolation cavity (3) is located between the cold air cavity (23) of the two air ducts (2).

7. The waste heat recovery water curtain cooling device according to claim 1, characterized in that: Ventilation holes (81) are provided on the upper and front sides of the outer shell (8) at the cold air cavity (23).

8. The waste heat recovery water curtain cooling device according to claim 1, characterized in that: The opening of the air inlet cavity (21) faces downward, and a filter screen (10) is provided at the opening of the air inlet cavity (21).

9. The waste heat recovery water curtain cooling device according to claim 1, characterized in that: The opening of the air inlet cavity (21) faces the left / right side wall of the outer shell (8). An L-shaped extension air duct (6) is connected to the opening side of the air inlet cavity (21). The L-shaped extension air duct (6) includes a vertical air duct (61) and a horizontal air duct (62). The end of the horizontal air duct (62) is connected to the air inlet cavity (21). The opening of the vertical air duct (61) faces downward. A filter screen (10) is installed inside the vertical air duct (61).

10. The waste heat recovery water curtain cooling device according to claim 8 or 9, characterized in that: The filter (10) is installed at an angle by being pulled out from the side wall of the housing (8) into the air inlet cavity (21).

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