Waste heat recovery integrated dishwasher

Abstract

The invention belongs to the technical field of dish washing machines, and particularly relates to a waste heat recovery integrated dish washing machine which comprises main washing equipment and waste heat recovery equipment arranged above the main washing equipment. The waste heat recovery device comprises a water storage tank, an evaporator, a compressor, a heat exchanger and an expansion valve, a heat recovery water inlet pipe and a heat recovery water outlet pipe of the water storage tank are connected with a heat exchanger pipeline; a hot air recovery channel is arranged at the inlet end and / or the outlet end of the main washing equipment, and the outlet end of the hot air recovery channel directly faces the evaporator; the water storage tank provides hot water for the main washing device. According to the integrated dishwasher, the water storage tank, the compressor, the evaporator, the heat exchanger, the expansion valve and the fan are integrated and arranged above the main washing equipment, the occupied area is saved, and the integrated dishwasher only needs to be directly placed in a decontamination room and does not need to be installed by professional workers. Meanwhile, the hot air recovery channels are directly arranged at the inlet end and the outlet end of the main washing equipment, and heat is effectively collected in time.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of dishwashers, and particularly relates to a waste heat recovery integrated dishwasher. BACKGROUND

[0002] A traditional dishwasher or sterilizer is installed in a decontamination room, and high temperature and high humidity are generated during operation of the equipment, causing a lot of mist in the room. A large amount of hot air needs to be blown to the outside by a fan, causing heat waste. Some air conditioners or waste heat recovery equipment are fixed on the ground in the decontamination room, which needs to occupy the working space and is not accurate in heat absorption position, and the cooling effect is not obvious, and a large amount of heat energy is wasted.

[0003] The dishwasher, the sterilizer, the waste heat recovery equipment and the water storage tank are usually three independent devices, and the installation requires high professional degree of installers, and the two need to be installed according to the site environment. SUMMARY

[0004] The application aims to overcome the defect that the waste heat recovery equipment and the dishwasher are separately installed and occupy a large area in the prior art, and provides a waste heat recovery integrated dishwasher integrating the dishwasher main body, the waste heat recovery equipment and the water storage tank.

[0005] The application adopts the technical scheme to solve the technical problem:

[0006] A waste heat recovery integrated dishwasher, characterized in that: comprising a main washing device and a waste heat recovery device arranged above the main washing device; the waste heat recovery device comprises a water storage tank and an evaporator, a compressor, a heat exchanger and an expansion valve connected in sequence to form a closed loop through a refrigerant pipe; the heat recovery water inlet pipe and the heat recovery water outlet pipe of the water storage tank are connected with the heat exchanger pipe; the inlet end and / or the outlet end of the main washing device is provided with a hot air recovery channel, and the outlet end of the hot air recovery channel is arranged opposite to the evaporator; the water storage tank provides hot water for the main washing device.

[0007] Further, the water storage tank is arranged on the inner side of the evaporator, and the side wall surface opposite to the evaporator of the water storage tank forms an acute angle with the evaporator.

[0008] Further, the inlet end and the outlet end of the main washing device are both provided with hot air recovery channels, and the outlet end of each hot air recovery channel is arranged opposite to one evaporator, and the water storage tank is arranged between the two evaporators.

[0009] Further, the horizontal cross section of the water storage tank is trapezoidal.

[0010] Further, the waste heat recovery equipment further comprises a fan for blowing the cold air after heat exchange, and the shell of the waste heat recovery equipment is provided with a cold air outlet at the upper end.

[0011] Further, the cold air outlet comprises a front outlet and an upper outlet, and a spherical switching valve for switching the direction of the cold air outlet is arranged in the pipeline of the cold air outlet.

[0012] Further, the cold air outlet is connected with a cold air outlet pipeline, the outlet of the cold air outlet pipeline is connected to the inlet end and / or the outlet end of the main washing device, and the cold air outlet pipeline is located outside the hot air recovery pipeline.

[0013] Further, a filter screen is arranged inside the hot air recovery pipeline and is inclined to the horizontal plane, and the lower end of the filter screen is connected to the water guide groove.

[0014] Further, the upper end of the filter screen is connected with a sealing plate, the outer side of the sealing plate is provided with a handle, the outer side of the hot air recovery pipeline is provided with a filter screen mounting hole matched with the sealing plate, and the filter screen is quickly mounted by mounting the sealing plate into the filter screen mounting hole.

[0015] Further, the inner sides of the two opposite side walls of the hot air recovery pipeline are provided with two guide grooves parallel to each other, and when the filter screen is mounted into the hot air recovery pipeline from the filter screen mounting hole, the two side edges of the filter screen are slidingly mounted in the guide grooves.

[0016] Further, the waste heat recovery device is fixedly mounted on the upper shell of the main washing device.

[0017] Further, the waste heat recovery device is hung on the ceiling above the main washing device, the upper shell of the main washing device is fixedly provided with a spring frame, a damping spring is arranged in the spring frame, a pull rod is arranged in the damping spring, the top end of the damping spring abuts against the spring frame, and the bottom end of the damping spring is fixedly connected with the bottom end of the pull rod; the top end of the pull rod is fixedly mounted on the ceiling.

[0018] Further, the hot air recovery pipeline is divided into a vertical drainage cavity and a horizontal drainage cavity connected to the upper end of the vertical drainage cavity, the horizontal drainage cavity is arranged opposite to the evaporator, and the filter screen is arranged in the vertical drainage cavity.

[0019] The waste heat recovery integrated dishwasher has the following advantages:

[0020] 1. The water storage tank, compressor, evaporator, heat exchanger, expansion valve and fan are integrated together and arranged above the main washing device, saving floor space, and only the integrated dishwasher needs to be directly placed in the decontamination room, without the need for professional installation. At the same time, the water storage tank is innovatively arranged above the main washing device instead of below the main washing device, greatly reducing the overall size of the dishwasher. At the same time, the hot air recovery channel is directly arranged at the inlet end and the outlet end of the main washing device with the most heat source, and the collected hot air is directly passed through the evaporator to collect heat in time and effectively.

[0021] 2. The angle between the side wall of the water storage tank opposite to the evaporator and the evaporator is an acute angle, so that the side of the water storage tank has a certain angle with the evaporator, which plays a guiding role for the hot air and increases the heat recovery efficiency; the trapezoidal water storage tank design cleverly uses the trapezoidal gap at one end contacting the evaporator to leave enough gap and form a smooth air duct with a half trumpet mouth, enhancing the air inlet guiding effect.

[0022] 3. The cold air outlet pipeline introduces cold air to the outlet end of the main washing device to dry and disinfect the wet tableware. The cold air outlet pipeline introduces cold air to the inlet end of the main washing device, which can accurately cool the operator and improve the comfort of the working environment.

[0023] 4. The filter screen is installed on the hot air recovery pipeline by a handle pull type, which is invisible as a whole from the outside, and the filter screen also has a large contact area to enhance the oil adsorption capacity. The horizontally inclined installation of the filter screen makes the condensed water of water vapor flow down along the slope into the water guide groove, and the water is introduced out through the water guide groove, avoiding the disorderly dripping of condensed water on the washed tableware without a filter screen.

[0024] 5. The cold air outlet is designed to have a forward outlet and an upper outlet at the same time, and a spherical reversing valve is arranged in the cold air outlet. During installation, the spherical reversing valve is adjusted to adjust the air outlet direction according to the site environment. BRIEF DESCRIPTION OF DRAWINGS

[0025] The application will be further described in detail below in combination with the drawings and specific embodiments.

[0026] Figure 1 is the front view of the waste heat recovery integrated dishwasher of embodiment 1 of the application;

[0027] Figure 2 is the A-A sectional view of the waste heat recovery integrated dishwasher of embodiment 1 of the application;

[0028] Figure 3 is the left view of the waste heat recovery integrated dishwasher of embodiment 1 of the application;

[0029] Figure 4is a perspective view of the filter screen installation of the embodiment 1 of the present application;

[0030] Figure 5 is a cross-sectional view of the filter screen installation of the embodiment 1 of the present application;

[0031] Figure 6 is a partial structure view of the filter screen omitted state of the embodiment 1 of the present application;

[0032] Figure 7 is a structure view of the shock absorbing spring installation part of the embodiment 1 of the present application;

[0033] Figure 8 is a front view of the waste heat recovery integrated dishwasher of the embodiment 2 of the present application;

[0034] Figure 9 is a left view of the waste heat recovery integrated dishwasher of the embodiment 2 of the present application;

[0035] Figure 10 is a front view of the waste heat recovery integrated dishwasher of the embodiment 3 of the present application;

[0036] Figure 11 is an A-A cross-sectional view of the waste heat recovery integrated dishwasher of the embodiment 3 of the present application.

[0037] In the figure: 1. main washing device, 2. hot air recovery channel, 21. vertical flow guide cavity, 22. horizontal flow guide cavity, 3. waste heat recovery device, 31. evaporator, 32. expansion valve, 33. compressor, 34. heat exchanger, 4. water storage tank, 5. cold air outlet, 51. front outlet, 52. upper outlet, 6. fan, 8. cold air outlet duct, 9. filter screen, 10. water guide groove, 11. sealing plate, 12. handle, 13. filter screen installation hole, 14. guide groove, 15. spring holder, 16. shock absorbing spring, 17. pull rod, 18. ceiling. DETAILED DESCRIPTION

[0038] The present application will now be described in further detail by reference to the accompanying drawings. These drawings are simplified schematic views which show the basic structure of the present application in a schematic manner only, and thus only show the components relevant to the present application.

[0039] Embodiment 1

[0040] As Figures 1-7The shown embodiment of the waste heat recovery integrated dishwasher of the present application comprises a main washing device 1 and a waste heat recovery device 3 arranged above the main washing device 1; the waste heat recovery device 3 comprises a water storage tank 4 and an evaporator 31, a compressor 33, a heat exchanger 34 and an expansion valve 32 connected in sequence to form a closed loop through refrigerant pipes; the heat recovery water inlet pipe and the heat recovery water outlet pipe of the water storage tank 4 are connected to the heat exchanger 34; the inlet end and / or the outlet end of the main washing device 1 is provided with a hot air recovery channel 2, the outlet end of the hot air recovery channel 2 is arranged opposite to the evaporator 31; the water storage tank 4 provides hot water for the main washing device 1.

[0041] Of course, the waste heat recovery integrated dishwasher described in this embodiment can also be a sterilizer or a dishwasher and sterilizer integrated machine, and the main washing device 1 can be a dishwasher, a sterilizer or a dishwasher and sterilizer. Here, it is summarized as a dishwasher.

[0042] Generally, a large amount of hot air will be generated at the inlet end and outlet end of the main washing device 1, so in order to better recover the hot air, hot air recovery channels 2 can be arranged above the inlet end and outlet end to collect the hot air into the waste heat recovery device 3 for recovery.

[0043] Due to the limited internal space of the waste heat recovery device 3, in order to provide sufficient hot water for the main washing device 1, it is necessary to ensure the large capacity of the water storage tank 4 as much as possible, the water storage tank 4 is arranged inside the evaporator 31, and the angle between the side wall opposite to the evaporator 31 and the evaporator 31 is an acute angle. In order to increase the heat absorption efficiency of the evaporator 31, it is necessary to ensure that the hot air passes through the evaporator 31 as smoothly as possible without generating vortex.

[0044] The conventional water storage tank 4 is generally cylindrical, rectangular or square, if the above-shaped large water tank is placed at the evaporator 31, it will block the evaporator 31 inlet, and the evaporator 31 is easy to form a dead air zone, affecting the uniformity of heat exchange. If the side surface of the water storage tank 4 opposite to the evaporator 31 is parallel to each other, the hot air flows through the evaporator 31 and blows vertically to the water storage tank 4, then the next flow direction of the hot air is chaotic, forming vortex and other phenomena, which is not conducive to heat recovery. In this embodiment, the side surface of the water storage tank 4 has a certain angle with the evaporator 31, which plays a guiding role for the hot air and increases the heat recovery efficiency.

[0045] In embodiment 1, the inlet end and outlet end of the main washing device 1 are provided with hot air recovery channels 2, and the outlet end of each hot air recovery channel 2 is provided with an evaporator 31 arranged opposite to it, and the water storage tank 4 is arranged between the two evaporators 31, and the horizontal cross section of the water storage tank 4 is trapezoidal.

[0046] The trapezoidal water storage tank 4 is designed to have a trapezoidal notch at one end contacting the evaporator 31, leaving enough space and forming a half-horn-shaped smooth air duct, which enhances the air guiding effect.

[0047] The water storage tank 4 is connected to a water pipe and a heat recovery circulation pipe, which is connected to the heat exchanger 34. The water in the water storage tank 4 is heated by the refrigerant in the heat exchanger 34, and a circulation pump is installed on the water storage tank 4 to circulate the water. The hot water in the water storage tank 4 is delivered to the main washing equipment 1 through the water pipe.

[0048] The waste heat recovery equipment 3 also includes a fan 6 for blowing the cooled air after heat exchange. The shell of the waste heat recovery equipment 3 is provided with a cold air outlet 5 at the top. The cold air outlet 5 can be forward or upward, and the orientation of the cold air outlet 5 is set according to the distance between the top of the waste heat recovery equipment 3 and the ceiling 18 and the installation environment.

[0049] The blown cold air can cool the hot kitchen.

[0050] In this embodiment, the cold air outlet 5 is connected to a cold air outlet pipeline 8, the outlet of which is connected to the inlet and / or outlet of the main washing equipment 1, and the cold air outlet pipeline 8 is located outside the hot air recovery pipeline. The operator needs to put the tableware into the main washing equipment 1 at the inlet of the main washing equipment 1, and the cold air outlet pipeline 8 can accurately cool the operator by guiding the cold air to the inlet of the main washing equipment 1, thereby improving the comfort of the working environment. At the outlet of the main washing equipment 1, the tableware is not completely dried, or the main washing equipment 1 does not have a drying device, and the cold air outlet pipeline 8 can dry and disinfect the wet tableware by guiding the cold air to the outlet of the main washing equipment 1.

[0051] The cold air outlet pipeline 8 can also be provided with a wind valve switch to adjust the air volume of the two cold air outlet pipelines 8 as needed.

[0052] The surface temperature of the washed and cleaned article is about 80℃, and there are some water droplets, and the temperature of the surrounding environment at the outlet is about 40℃. It is not friendly to the operator. At this time, the strong cold air of about 25℃ from the waste heat recovery equipment 3 is blown to the article through the cold air outlet pipeline 8, realizing rapid cooling and drying, and the temperature of the surrounding working environment is controlled within 30℃.

[0053] The hot air recovery pipeline is internally provided with a filter screen 9 which is obliquely arranged with respect to the horizontal plane, the lower end of the filter screen 9 being connected to a water guide groove 10. The upper end of the filter screen 9 is connected with a sealing plate 11, the outer side of the sealing plate 11 being provided with a handle 12, the outer side of the hot air recovery pipeline being provided with a filter screen mounting hole 13 which is adapted to the sealing plate 11, and the filter screen 9 is quickly mounted by mounting the sealing plate 11 into the filter screen mounting hole 13. The inner sides of the two opposite side walls of the hot air recovery pipeline are provided with two guide grooves 14 which are parallel to each other, and when the filter screen 9 is mounted into the hot air recovery pipeline from the filter screen mounting hole 13, the two side edges of the filter screen 9 are slidingly mounted in the guide grooves 14. The filter screen 9 is pullably mounted on the hot air recovery pipeline by the handle 12, and can be invisible as a whole from the outside, and the filter screen 9 also has a super large contact area and enhanced oil stain adsorption capacity, and the obliquely arranged filter screen 9 enables the condensed water formed by the water vapor to flow downward along the slope into the water guide groove 10, and the water is guided out through the water guide groove 10, thereby avoiding the disordered dripping of the condensed water onto the washed tableware when there is no filter screen 9. The dried inlet air through the filter screen 9 can improve the service efficiency and life of the evaporator 31. The filter screen 9 is designed in a multi-layer stainless steel wire filter screen, which can be used for effective filtration of oil fume and has the advantage of repeated cleaning.

[0054] In the embodiment, the waste heat recovery device 3 is hung on the ceiling 18 above the main washing device 1, the upper shell of the main washing device 1 is fixedly provided with a spring frame 15, the spring frame 15 is provided with a damping spring 16, the damping spring 16 is internally provided with a pull rod 17, the top end of the damping spring 16 abuts against the spring frame 15, and the bottom end of the damping spring 16 is fixedly connected with the bottom end of the pull rod 17; the top end of the pull rod 17 is fixedly mounted on the ceiling 18.

[0055] Since vibration is usually generated in the working process of the fan 6, the vibration will generate noise and cause failure of the mounting and fixing structure. The waste heat recovery device 3 is mounted by at least four damping springs 16 and pull rods 17, which can reduce the noise of the whole machine and control the noise within 65db due to the characteristics such as large damping and self-vibration frequency of about 2.1-2.7hz.

[0056] The hot air recovery pipeline is provided in an L shape and is divided into a vertical flow guide cavity 21 and a horizontal flow guide cavity 22 which is connected to the upper end of the vertical flow guide cavity 21, and the horizontal flow guide cavity 22 is oppositely arranged with respect to the evaporator 31. The filter screen 9 is arranged in the vertical flow guide cavity 21, and the hot air is vertically blown to the evaporator 31 after being guided by the horizontal flow guide cavity 22, thereby effectively improving the heat recovery efficiency.

[0057] Embodiment 2

[0058] Reference is made to Figure 8 and Figure 9The difference between this embodiment and embodiment 1 is that the waste heat recovery device 3 is fixedly installed on the upper shell of the main washing device 1. The cold air outlet 5 comprises a front outlet 51 and an upper outlet 52, and a spherical reversing valve for switching the direction of the cold air outlet is installed in the pipeline of the cold air outlet 5.

[0059] The waste heat recovery device 3 can be selected to be hoisted or directly installed on the main washing device 1 according to the need of on-site installation. If the ceiling 18 is low, the cold air outlet 5 cannot be set to blow upwards, and needs to blow forward or backward. In order to modularize and standardize the production equipment, the cold air outlet 5 is designed to have both the front outlet 51 and the upper outlet 52, and the spherical reversing valve is installed in the cold air outlet 5, and the installation worker adjusts the direction of the cold air outlet according to the on-site environment.

[0060] In this embodiment, the cold air outlet pipeline 8 is not set, and the cold air is directly blown out from the cold air outlet 5 to cool the dishwashing room.

[0061] Embodiment 3

[0062] See Figure 10 and Figure 11 The difference between this embodiment and embodiment 1 is:

[0063] The waste heat recovery device 3 is directly fixedly installed on the main washing device 1, so that the space above the main washing device 1 is maximally utilized in the case of limited room height, the area of the evaporator 31 and the capacity of the water storage tank 4 are increased, and only the vertical waste heat recovery pipeline is set to maximize the contact of the hot air with the evaporator 31.

[0064] It should be understood that the specific embodiments described above are only used to explain the present application, and are not used to limit the present application. The obvious changes or modifications derived from the spirit of the present application are still within the protection scope of the present application.

Claims

1. A waste heat recovery integrated dishwasher, characterized by: The invention comprises a main washing device (1) and a waste heat recovery device (3) arranged above the main washing device (1); the waste heat recovery device (3) comprises: a water storage tank (4) and an evaporator (31), a compressor (33), a heat exchanger (34) and an expansion valve (32) which are sequentially connected in a closed circuit via a refrigerant pipe; the heat recovery water inlet pipe and the heat recovery water outlet pipe of the water storage tank (4) are both connected to the heat exchanger (34) pipe; a hot air recovery channel (2) is provided at the inlet end and / or the outlet end of the main washing device (1), and the outlet end of the hot air recovery channel (2) is arranged opposite to the evaporator (31); the water storage tank (4) provides hot water to the main washing device (1).

2. The waste heat recovery integrated dishwasher according to claim 1, characterized in that: The water storage tank (4) is arranged on the inner side of the evaporator (31), and the angle between the side wall surface of the water storage tank (4) opposite to the evaporator (31) and the evaporator (31) is an acute angle.

3. The waste heat recovery integrated dishwasher according to claim 2, characterized in that: The inlet and outlet ends of the main washing device (1) are both provided with hot air recovery channels (2), the outlet end of each hot air recovery channel (2) is directly opposite to an evaporator (31), and the water storage tank (4) is provided between the two evaporators (31).

4. The waste heat recovery integrated dishwasher according to claim 2, characterized in that: The horizontal cross section of the water storage tank (4) is trapezoidal.

5. The waste heat recovery integrated dishwasher according to claim 1, characterized in that: The waste heat recovery device (3) further comprises a fan (6) for blowing out cold air after heat exchange, and a cold air outlet (5) is provided at the upper end of the shell of the waste heat recovery device (3).

6. The waste heat recovery integrated dishwasher according to claim 5, characterized in that: The cold air outlet (5) comprises a forward outlet (51) and an upper outlet (52), and a spherical reversing valve for switching the cold air outlet direction is installed in the pipe of the cold air outlet (5).

7. The waste heat recovery integrated dishwasher according to claim 1, characterized in that: The cold air outlet (5) is connected to a cold air outlet duct (8), the outlet of the cold air outlet duct (8) is connected to the inlet and / or outlet of the main washing device (1), and the cold air outlet duct (8) is located outside the hot air recovery duct.

8. The waste heat recovery integrated dishwasher according to claim 1, characterized in that: A filter screen (9) arranged obliquely to the horizontal plane is provided inside the hot air recovery pipe, and the lower end of the filter screen (9) is connected to the water guide trough (10).

9. The waste heat recovery integrated dishwasher according to claim 8, characterized in that: The upper end of the filter screen (9) is connected to a sealing plate (11), and a handle (12) is installed on the outer side of the sealing plate (11). The outer side surface of the hot air recovery duct is provided with a filter screen installation hole (13) adapted to the sealing plate (11). By installing the sealing plate (11) into the filter screen installation hole (13), the filter screen (9) can be quickly installed.

10. The waste heat recovery integrated dishwasher according to claim 9, characterized in that: Two mutually parallel guide grooves (14) are provided on the inner sides of the two opposite side walls of the hot air recovery duct. When the filter screen (9) is installed into the hot air recovery duct through the filter screen installation hole (13), the two side edges of the filter screen (9) are slidably installed in the guide grooves (14).

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