A waste heat recovery apparatus

Abstract

The utility model belongs to the waste heat recovery technical field, concretely relates to a waste heat recovery equipment, including heat recovery channel, the evaporimeter of setting in the air outlet of heat recovery channel and the water tank of setting in the inboard of evaporimeter, the included angle of the side wall surface opposite water tank and evaporimeter is acute angle, the horizontal cross section of water tank is trapeziform, the utility model discloses the included angle of the side wall surface opposite water tank and evaporimeter is acute angle, so that the side of water tank and evaporimeter have certain angle of inclusion, and the hot air plays a guiding effect, and increases heat recovery efficiency, trapeziform water tank design, cleverly utilize the trapeziform gap of one end of evaporimeter contacted, and the sufficient clearance is left, and forms a half horn mouth smooth air duct, and the air inlet guiding effect is enhanced.

Description

Technical Field

[0001] This utility model belongs to the field of waste heat recovery technology, and specifically relates to a waste heat recovery device. Background Technology

[0002] When dishwashers or sterilizers are installed in the washing and sterilization room, the high temperature and humidity generated during operation cause a lot of indoor fog, and a large amount of hot air needs to be blown to the outside by the fan, resulting in heat waste.

[0003] If heat is recovered through waste heat recovery equipment and used to heat water, the hot water can be used for decontamination, saving a lot of energy. Heat recovery can be achieved through heat pumps, allowing the heat to be effectively heated by passing through an evaporator. However, waste heat recovery equipment has a water tank located inside the evaporator. After the heat flows through the evaporator, a vortex is formed between the evaporator and the water tank, affecting the flow of heat and thus impacting the heat recovery efficiency. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies where hot gas forms a vortex between the evaporator and the water tank after passing through the evaporator, resulting in low heat recovery efficiency. This invention provides a waste heat recovery device that can effectively guide hot gas.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A waste heat recovery device is characterized in that it includes a heat recovery channel, an evaporator disposed at the air outlet of the heat recovery channel, and a water tank disposed inside the evaporator; the angle between the side wall of the water tank opposite to the evaporator and the evaporator is an acute angle.

[0007] Furthermore, it has two hot air recovery channels and evaporators, with the water tank positioned between the two evaporators.

[0008] Furthermore, a funnel-shaped opening for guiding hot air is formed between the evaporator and the outer wall of the water tank.

[0009] Furthermore, it also includes a compressor connected to the evaporator via a refrigerant pipe, a heat exchanger connected to the compressor via a refrigerant pipe, and an expansion valve connected to the heat exchanger via a refrigerant pipe; the expansion valve is connected to the evaporator via a refrigerant pipe; the heat recovery inlet pipe and heat recovery outlet pipe of the water tank both achieve heat exchange with the refrigerant pipe through the heat exchanger.

[0010] Furthermore, it also includes a fan, the air outlet of which is connected to a cold air duct, the cold air duct having multiple exhaust vents.

[0011] Furthermore, the exhaust port includes a forward-blowing port and an upward-blowing port, and a ball-shaped reversing valve for switching the direction of cold air outlet is installed inside the cold air duct.

[0012] Furthermore, the heat recovery channel has a filter screen installed at an angle to the horizontal plane, and the bottom of the filter screen is set in the diversion groove.

[0013] Furthermore, the horizontal cross-section of the water tank is trapezoidal.

[0014] Furthermore, the heat recovery channel includes: a vertical drainage cavity and a horizontal drainage cavity connected to each other, with the end of the horizontal drainage cavity facing the evaporator.

[0015] Furthermore, the cold air channel is arched, with the bottom end of the cold air channel blowing downwards.

[0016] The beneficial effects of the waste heat recovery device of this utility model are:

[0017] 1. The angle between the side wall of the water tank and the evaporator is acute, which makes the side of the water tank and the evaporator have a certain angle, which plays a guiding role for hot air and increases heat recovery efficiency; the trapezoidal water tank design cleverly utilizes the trapezoidal notch at the end that contacts the evaporator to leave enough gap and form a semi-flared air duct, which enhances the air intake guiding effect.

[0018] 2. By setting up two heat recovery channels, with an evaporator at the end of each channel and a fan inside the waste heat recovery equipment, negative pressure is created inside the equipment by the fan, allowing air to enter simultaneously from the air inlets of both heat recovery channels, increasing the air volume and the contact area of ​​the heat evaporator, thereby improving heat recovery efficiency.

[0019] 3. Design the exhaust vent to have both a forward-blowing vent and an upward-blowing vent. Install a ball valve inside the cold air duct. During installation, adjust the ball valve according to the site environment to select whether the cold air blows forward or upward.

[0020] 4. The filter screen has the ability to adsorb oil and dust, and the horizontally inclined installation of the filter screen allows water droplets formed by water vapor condensation to flow down the slope into the drainage channel, and the water is drawn out through the drainage channel, avoiding the disorderly dripping of condensate onto the washed dishes that is not possible with traditional filters. Attached Figure Description

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0022] Figure 1 This is a front view of the waste heat recovery device according to Embodiment 1 of this utility model;

[0023] Figure 2 yes Figure 1 Sectional view of AA;

[0024] Figure 3 This is a left view of the waste heat recovery device of Embodiment 1 of this utility model;

[0025] Figure 4 This is a schematic diagram of the filter screen installation in Embodiment 1 of this utility model;

[0026] Figure 5 This is a front view of the waste heat recovery device according to Embodiment 2 of this utility model;

[0027] Figure 6 yes Figure 5 Sectional view of AA;

[0028] Figure 7 This is a left view of the waste heat recovery device of Embodiment 2 of this utility model.

[0029] In the diagram: 1. Evaporator, 2. Heat recovery channel, 21. Vertical drainage chamber, 22. Horizontal drainage chamber, 3. Water tank, 4. Expansion valve, 5. Compressor, 6. Heat exchanger, 7. Vent, 8. Cold air channel, 9. Exhaust vent, 91. Forward air outlet, 92. Upward air outlet, 10. Fan, 11. Filter screen, 12. Drainage groove. Detailed Implementation

[0030] 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 present invention, and therefore only show the components relevant to the present invention.

[0031] The waste heat recovery device described in this patent can be placed in any location with hot air or hot steam, and is particularly suitable for placement in a decontamination room. Specifically, it can be placed anywhere within the decontamination room, but is preferably placed at locations where hot air overflows, such as the inlet or outlet of a dishwasher or disinfectant.

[0032] Example 1

[0033] like Figures 1-4The present invention provides a specific embodiment of a waste heat recovery device, including a heat recovery channel 2, an evaporator 1 disposed at the outlet of the heat recovery channel 2, and a water tank 3 disposed inside the evaporator 1; the angle between the side wall of the water tank 3 and the evaporator 1 is acute. To better collect heat, if the waste heat recovery device is installed above a dishwasher, two heat recovery channels and evaporators 1 can be provided. The two heat recovery channels can be respectively located at the inlet and outlet of the dishwasher. To effectively utilize space and reduce the volume of the waste heat recovery device, the water tank 3 is positioned between the two evaporators 1. The water tank 3 can be configured as a trapezoidal water tank 3, i.e., the horizontal cross-section of the water tank 3 is trapezoidal, thus forming a funnel-shaped opening 7 between the outer wall of the evaporator 1 and the water tank 3 to guide the hot air flow. A fan 10 is also installed between the two evaporators 1, along with a compressor 5 connected to the evaporators 1 via refrigerant pipes, a heat exchanger 6 connected to the compressor 5 via refrigerant pipes, and an expansion valve 4 connected to the heat exchanger 6 via refrigerant pipes. The expansion valve 4 is connected to the evaporators 1 via refrigerant pipes. The heat recovery inlet and outlet pipes of the water tank 3 both exchange heat with the refrigerant pipes via the heat exchanger 6. The coil connected to the water tank 3 heats the water in the coil through the heat of the refrigerant in the refrigerant pipes in the heat exchanger 6.

[0034] The rotation of the fan 10 draws hot air into the two heat recovery channels 2, which then heats the refrigerant after passing through the evaporator 1. The refrigerant, after passing through the compressor 5, becomes a high-temperature, high-pressure gas that exchanges heat with the coils in the heat exchanger 6, heating the water within the coils. To increase the contact area between the hot air and the evaporator 1, the evaporator 1 is entirely positioned inside the heat recovery channels 2. After passing through the evaporator 1, the hot air is guided by the outer wall of the trapezoidal water tank 3 by the flared opening 7, creating an orderly flow direction and enhancing the airflow guidance.

[0035] The fan 10 blows out cold air to cool the room. The air outlet of the fan 10 is connected to the cold air duct 8, which has multiple exhaust vents 9.

[0036] Preferably, the exhaust vent 9 includes a forward-blowing vent 91 and an upward-blowing vent 92, and a ball-shaped reversing valve is installed inside the cold air duct to switch the direction of the cold air output. If there is ample space above the waste heat recovery equipment at the installation site, the installer can adjust the ball-shaped reversing valve to blow cold air upwards; otherwise, it can blow cold air forwards. Alternatively, the cold air can be blown backwards or in other directions; those skilled in the art can design the direction of the exhaust vent as needed.

[0037] The heat recovery channel 2 contains a filter screen 11 installed at an angle to the horizontal plane, with the bottom of the filter screen 11 located within a drainage channel 12. The filter screen 11 also features a large contact area, enhancing its oil adsorption capacity. The horizontally angled installation of the filter screen 11 allows water droplets formed by water vapor condensation to flow down the slope into the drainage channel 12, where the water is drained away, preventing the disorderly dripping of condensate onto washed dishes, as is common without a filter screen 11. The dried air intake after passing through the filter screen 11 improves the efficiency and lifespan of the evaporator 1. The filter screen 11 uses a multi-layer stainless steel wire design, effectively filtering oil fumes and allowing for repeated cleaning. The drainage channel 12 can be fixedly installed within the heat recovery channel 2.

[0038] Example 2

[0039] See Figures 5-7 In this embodiment, the heat recovery channel 2 is L-shaped, including a vertically connected flow chamber 21 and a horizontally connected flow chamber 22, with the end of the horizontally connected flow chamber 22 facing the evaporator 1. The vertically connected flow chamber 21 can be located at the inlet or outlet of the dishwasher, where there is a lot of hot air. Through the vertically connected flow chamber 21, the hot air is guided into the horizontally connected flow chamber 22. The horizontally connected flow chamber 22 changes the blowing direction of the hot air, so that the hot air is blown vertically towards the evaporator 1, which can effectively improve the efficiency of heat exchange.

[0040] In this embodiment, the cold air duct 8 extends downwards, with its bottom end blowing air downwards. If the waste heat recovery device is placed above the dishwasher, the bottom end of the cold air duct 8 can blow cold air onto the tableware to accelerate its drying. A single downward-blowing outlet can be provided for drying the tableware, or the cold air duct 8 can be arched with two downward-blowing outlets: one for drying the tableware and the other for cooling the operator. A rotating air knife can be installed at the bottom of the cold air duct 8, rotating it to direct the air outlet directly onto the tableware for drying.

[0041] It should be understood that the specific embodiments described above are only for explaining the present invention and are not intended to limit the present invention. Obvious variations or modifications derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims

1. A waste heat recovery device, characterized in that: It includes a heat recovery channel (2), an evaporator (1) set at the air outlet of the heat recovery channel (2), and a water tank (3) set inside the evaporator (1); the angle between the side wall of the water tank (3) opposite to the evaporator (1) and the evaporator (1) is an acute angle.

2. The waste heat recovery equipment according to claim 1, characterized in that: It has two hot air recovery channels and evaporators (1), with the water tank (3) located between the two evaporators (1).

3. The waste heat recovery equipment according to claim 1, characterized in that: A funnel-shaped opening (7) for guiding hot air is formed between the outer wall of the evaporator (1) and the water tank (3).

4. The waste heat recovery equipment according to claim 3, characterized in that: It also includes a compressor (5) connected to the evaporator (1) via a refrigerant pipe, a heat exchanger (6) connected to the compressor (5) via a refrigerant pipe, and an expansion valve (4) connected to the heat exchanger (6) via a refrigerant pipe; the expansion valve (4) is connected to the evaporator (1) via a refrigerant pipe; the heat recovery inlet pipe and heat recovery outlet pipe of the water tank (3) are both heat exchanged with the refrigerant pipe via the heat exchanger (6).

5. The waste heat recovery equipment according to claim 1, characterized in that: It also includes a fan (10), the air outlet of which is connected to a cold air duct (8), which has multiple exhaust ports (9).

6. The waste heat recovery equipment according to claim 5, characterized in that: The exhaust port (9) includes a forward air outlet (91) and an upward air outlet (92), and a ball reversing valve for switching the direction of cold air outlet is installed in the cold air channel.

7. The waste heat recovery equipment according to claim 1, characterized in that: The heat recovery channel (2) has a filter screen (11) installed at an angle to the horizontal plane, and the bottom of the filter screen (11) is set in the diversion groove (12).

8. The waste heat recovery equipment according to claim 2, characterized in that: The horizontal cross-section of the water tank (3) is trapezoidal.

9. The waste heat recovery equipment according to any one of claims 1-8, characterized in that: The heat recovery channel (2) includes a vertical drainage chamber (21) and a horizontal drainage chamber (22) connected to each other, with the end of the horizontal drainage chamber (22) facing the evaporator (1).

10. The waste heat recovery equipment according to claim 5, characterized in that: The cold air channel (8) extends downwards, and the bottom end of the cold air channel (8) blows air downwards.

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