A water heat recovery device based on a washing apparatus

Abstract

The application relates to the technical field of water resource and waste heat recovery of laundry equipment, and provides a water and heat recovery device based on a washing equipment, which comprises a tunnel type washing machine and a squeezing dewatering machine, the tunnel type washing machine comprises a pre-washing area, a main washing area and a rinsing area which are sequentially connected; a water collecting bin, the water inlets of the water collecting bin are connected with the water outlets of the rinsing area and the squeezing dewatering machine respectively; a distribution water tank, the distribution water tank has a hot water cavity and a cold water cavity which are separated from each other, the cold water cavity is connected with the hot water cavity through a one-way valve, the flow direction of the one-way valve is from the cold water cavity to the hot water cavity, the cold water cavity is connected with the water outlets of the water collecting bin and the water inlets of the pre-washing area respectively, and the hot water cavity is connected with the water inlets of the main washing area; a water vapor condensate water recovery pipe and a heat exchange coil pipe located in the hot water cavity, the water vapor condensate water recovery pipe is connected with the inlet of the heat exchange coil pipe, and the water and heat recovery device based on the washing equipment realizes multistage recovery and utilization of waste water and waste heat, and the energy-saving effect is remarkable.

Description

Technical Field

[0001] This application relates to the field of water resources and waste heat recovery technology for laundry equipment, and more specifically, to a water heat recovery device based on laundry equipment. Background Technology

[0002] A tunnel washing machine, also known as a washing machine with a washing drum, is a highly efficient industrial washing device widely used in large-scale laundry factories, hotels, hospitals, and other similar locations. Its core structure is a long tunnel composed of multiple interconnected washing compartments. Using a spiral conveyor system, clothing, sheets, and other textiles move automatically and continuously between these compartments. Through segmented program control, the washing machine sequentially completes multiple processes such as pre-washing, main washing, and rinsing of clothing, sheets, and other textiles, achieving automated assembly line production and offering significant advantages in water saving, energy conservation, and high efficiency.

[0003] A typical trolley system also includes a separate dehydrator. After rinsing, clothes, sheets, and other textiles exit from the end of the trolley and immediately enter the dehydrator for high-pressure dehydration. The dehydrator mechanically removes most of the water from the clothes, sheets, and other textiles, significantly reducing energy consumption and time in the subsequent drying process.

[0004] However, a common drawback of currently widely used trolley washing technology is the failure to effectively recycle and utilize wastewater generated during the washing and spin-drying processes. Specifically, trolleys discharge large amounts of heat-containing wastewater during each washing stage (especially the high-temperature main wash) and during the high-pressure spin-drying process in the dehydrator. This wastewater is usually discharged directly into the sewer without any treatment. This results in a huge waste of water resources during the washing process and a significant waste of the heat energy carried by the wastewater.

[0005] Therefore, how to recycle and utilize the wastewater and heat energy discharged from the washing machine and its matching dewatering machine to reduce the energy and water consumption of the washing process is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] In view of this, this application provides a water heat recovery device based on a washing equipment to solve the technical problem of poor water and energy saving effect of tunnel washing machines in the prior art when performing washing operations.

[0007] This application provides a water heat recovery device based on a washing machine, wherein the water heat recovery device based on the washing machine includes: A tunnel-type washing machine and a press dehydrator, wherein the tunnel-type washing machine includes a pre-wash zone, a main wash zone, and a rinsing zone connected in sequence; A water collection tank, the water inlet of which is connected to the drain outlet of the rinsing area and the drain outlet of the press dewatering machine, respectively; A distribution tank has a hot water chamber and a cold water chamber separated from each other. The cold water chamber is connected to the hot water chamber through a one-way valve. The flow direction of the one-way valve is from the cold water chamber to the hot water chamber. The cold water chamber is connected to the outlet of the water collection tank and the inlet of the pre-wash area. The hot water chamber is connected to the inlet of the main wash area. A steam condensate recovery pipe and a heat exchange coil located in the hot water chamber, wherein the steam condensate recovery pipe is connected to the inlet of the heat exchange coil.

[0008] Furthermore, the tunnel-type washing machine includes multiple pre-wash compartments, multiple main wash compartments, and multiple rinsing compartments. The multiple pre-wash compartments are connected sequentially in the pre-wash area, the multiple main wash compartments are connected sequentially in the main wash area, and the multiple rinsing compartments are connected sequentially in the rinsing area. The last pre-wash compartment in the sequentially connected multiple pre-wash compartments is connected to the first main wash compartment in the sequentially connected multiple main wash compartments, and the last main wash compartment in the sequentially connected multiple main wash compartments is connected to the first rinsing compartment in the sequentially connected multiple rinsing compartments.

[0009] Furthermore, the water heat recovery device based on the washing equipment also includes a dryer and an iron, both of which have condensate drain outlets. The condensate drain outlets of the dryer and the iron are both connected to the water vapor condensate recovery pipe.

[0010] Furthermore, the water heat recovery device based on the washing equipment also includes a boiler and an economizer, with the outlet of the heat exchange coil connected to the inlet of the boiler and the outlet of the boiler connected to the inlet of the economizer.

[0011] Furthermore, the drain outlet of the rinsing zone is connected to the inlet of the water collection tank via a first pipe, the drain outlet of the press dewatering machine is connected to the inlet of the water collection tank via a second pipe, the outlet of the water collection tank is connected to the cold water chamber via a third pipe, the cold water chamber is connected to the inlet of the pre-washing zone via a fourth pipe, the hot water chamber is connected to the inlet of the main washing zone via a fifth pipe, the condensate outlet of the dryer is connected to the steam condensate recovery pipe via a sixth pipe, the condensate outlet of the ironing machine is connected to the steam condensate recovery pipe via a seventh pipe, and the outlet of the heat exchange coil is connected to the inlet of the boiler via an eighth pipe. The water heat recovery device based on the washing equipment further includes a first valve installed on the first pipeline, a second valve installed on the second pipeline, a third valve installed on the third pipeline, a fourth valve installed on the fourth pipeline, a fifth valve installed on the fifth pipeline, a sixth valve installed on the sixth pipeline, a seventh valve installed on the seventh pipeline, and an eighth valve installed on the eighth pipeline.

[0012] Furthermore, the water heat recovery device based on the washing equipment also includes a main controller, a first temperature sensor disposed in the cold water chamber, and a second temperature sensor disposed in the hot water chamber. The first valve, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve, the seventh valve, and the eighth valve are all electrically controlled valves. The first temperature sensor, the second temperature sensor, the first valve, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve, the seventh valve, and the eighth valve are all signal connected to the main controller.

[0013] Furthermore, the water heat recovery device based on the washing equipment includes a filtration pipeline and a filter installed on the filtration pipeline. The drain outlet of the rinsing zone and the drain outlet of the press dewatering machine are connected to the inlet of the water collection tank through the filtration pipeline. The filter includes a filter cylinder and a filter switching assembly. The filter cylinder has a filter cylinder inlet and a filter cylinder outlet. The filter cylinder inlet is connected to the drain outlet of the rinsing zone and the drain outlet of the press dewatering machine. The filter cylinder outlet is connected to the inlet of the water collection tank. The filter switching assembly includes a rotating shaft and four filter plates sequentially connected to the outer circumference of the rotating shaft at 90° equal angular intervals. The filter plates are provided with filter holes and filter hole blocking mechanisms. Any one of the four filter plates can be in the filtration working position. The filter plate in the filtration working position is vertically arranged and located directly below the filter plate forming a 180° angle with it. The three filter plates not in the filtration working position are respectively in sealed contact with the filter cylinder and are in filtration working position. The filter holes of the filter plate in the working position are not blocked by the corresponding filter hole blocking mechanism. The filter holes of the three filter plates not in the working position are blocked by the corresponding filter hole blocking mechanism. The two adjacent filter plates in the working position and the filter cylinder form a filter cavity. The filter cylinder inlet and filter cylinder outlet are respectively connected to the filter cavity. The filter plate in the working position is located in the filter cavity and between the filter cylinder inlet and the filter cylinder outlet. The filter includes an elastic holding mechanism disposed on the inner side of the filter cylinder. When the fluid entering the filter cavity from the filter cylinder inlet flows out through the filter plate in the working position and the filter cylinder outlet, if the resistance of the filter plate in the working position to the fluid is less than a predetermined value, the elastic holding mechanism limits the filter plate in the working position to the working position. If the resistance of the filter plate in the working position to the fluid is greater than or equal to the predetermined value, the filter plate in the working position rotates towards the filter cylinder outlet under the push of the fluid.

[0014] Furthermore, the filter hole blocking mechanism includes a blocking plate slidably connected to the filter plate. The blocking plate is elastically engaged with the filter plate via a first elastic member. The blocking plate is connected to a first magnetic member. The upper inner side of the filter cylinder is covered by a second magnetic member. The blocking plates on the filter plates in the working position of the four filter plates are positioned above the corresponding filter holes under the traction force of the corresponding first elastic member. The first magnetic members on the filter plates not in the working position are magnetically attracted by the second magnetic member, thereby driving the corresponding blocking plates to slide against the traction force of the corresponding first elastic member and block the corresponding filter holes.

[0015] Furthermore, grooves are formed on both sides of the filter plate in the width direction, and the elastic retaining mechanism includes a locking head that is retractably disposed inside the filter cylinder by a second elastic member. The locking head is engaged into the groove of the filter plate in the filtration working position by the thrust of the second elastic member.

[0016] Furthermore, the upper part of the filter cartridge forms a cavity with a semi-circular cross-section, and the lower part of the filter cartridge forms a cavity with a rectangular cross-section.

[0017] The beneficial effects of the hydrothermal recovery device based on washing equipment provided in this application are as follows: Compared to existing technologies, the water heat recovery device based on washing equipment provided by this invention collects water discharged from the rinsing zone and the press dewatering machine through a water collection tank and delivers it to the cold water chamber of the distribution tank for replenishing water in the pre-wash zone. Simultaneously, the hot water chamber of the distribution tank uses the heat from the condensation of high-temperature steam to raise the water temperature to a suitable level for the main wash (e.g., from around 30°C to 60-70°C), thus providing preheated washing water for the main wash zone and significantly reducing the energy consumption required for steam heating during the main wash process. A one-way valve between the cold and hot water chambers ensures that water can only flow from the cold water chamber to the hot water chamber, achieving automatic water balance and replenishment. The entire device has a compact structure, realizes multi-stage recovery and utilization of wastewater and waste heat, and has significant energy-saving effects.

[0018] In a further proposed solution, the high-temperature steam condensate comes from the condensate discharged from the dryer and iron, which can efficiently utilize the waste heat generated by the dryer and iron.

[0019] In a further embodiment, the water heat recovery device based on the washing equipment includes a filter pipeline and a filter installed on the filter pipeline. The filter includes a filter cartridge and a filter switching component, which eliminates the need for frequent filter plate replacement and enables automatic filter plate replacement (switching). Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of a water heat recovery device based on a washing equipment according to an embodiment of this application; Figure 2 This is a schematic diagram of some components of a water heat recovery device based on a washing equipment according to an embodiment of this application; Figure 3 This is a perspective view of a portion of the structure of a filter in a water heat recovery device based on a washing equipment according to an embodiment of this application; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5This is a schematic diagram of the filter plate in the filter of a water heat recovery device based on a washing equipment according to an embodiment of this application, when the filter plate is in the filtration working position. Figure 6 for Figure 5 Enlarged view of point B in the middle; Figure 7 This is a schematic diagram of a filter plate in a water heat recovery device based on a washing equipment according to an embodiment of this application, when the filter plate is not in the filtration working position. Figure 8 This is another schematic diagram of the filter plate in the filter of the water heat recovery device based on washing equipment according to an embodiment of this application when the filter plate is in the filtration working position; Figure 9 This is a perspective view of the second magnetic element in the filter of a hydrothermal recovery device based on a washing equipment according to an embodiment of this application.

[0022] Explanation of reference numerals in the attached figures: 1-Pressing and dehydrating machine; 2-Water collection tank; 3-One-way valve; 4-Water vapor condensate recovery pipe; 5-Heat exchange coil; 6-Dryer; 7-Ironing machine; 8-Boiler; 9-Economizer; 10-First pipeline; 11-Second pipeline; 12-Third pipeline; 13-Fourth pipeline; 14-Fifth pipeline; 15-Sixth pipeline; 16-Seventh pipeline; 17-Eighth pipeline; 18-First valve; 19-Second valve; 20-Third valve; 21-Fourth valve; 22-Fifth valve; 23-Sixth valve; 24-Seventh valve; 25-Eighth valve; 26-Filter pipeline; 100-Tunnel washing machine; 101-Pre-wash area; 10 2-Main washing area; 103-Rinse area; 104-Pre-wash chamber; 105-Main washing chamber; 106-Rinse chamber; 200-Distribution water tank; 201-Hot water chamber; 202-Cold water chamber; 300-Filter; 301-Filter cartridge; 302-Filter cartridge inlet; 303-Filter cartridge outlet; 304-Rotating shaft; 305-Filter plate; 306-Baffle plate; 307-First spring; 308-First magnetic suction component; 309-Second magnetic suction component; 310-Connecting rod; 311-Sliding mating cavity; 312-Sliding rod; 313-Groove; 314-Second spring; 315-Telescopic cavity; 316-Clipper; 317-Filter chamber; 318-Filter hole. Detailed Implementation

[0023] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. One or more embodiments of this application are exemplarily shown in the drawings to provide a more accurate and thorough understanding of the technical solutions disclosed herein. However, it should be understood that this application can be implemented in many different forms and is not limited to the embodiments described below.

[0024] In the accompanying drawings of this application, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0025] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously.

[0026] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0027] See Figures 1 to 9 This application provides a water heat recovery device based on a washing machine, wherein the water heat recovery device based on the washing machine includes: The tunnel washing machine 100 and the press dehydrator 1, the tunnel washing machine 100 includes a pre-wash zone 101, a main wash zone 102 and a rinsing zone 103 connected in sequence; Water collection tank 2, the water inlet of water collection tank 2 is connected to the drain outlet of rinsing zone 103 and the drain outlet of press dewatering machine 1 respectively; The water distribution tank 200 has a hot water chamber 201 and a cold water chamber 202 that are separated from each other. The cold water chamber 202 is connected to the hot water chamber 201 through a one-way valve 3. The flow direction of the one-way valve 3 is from the cold water chamber 202 to the hot water chamber 201. The cold water chamber 202 is connected to the outlet of the water collection tank 2 and the inlet of the pre-wash zone 101. The hot water chamber 201 is connected to the inlet of the main wash zone 102. The steam condensate recovery pipe 4 and the heat exchange coil 5 located in the hot water chamber 201 are connected to the inlet of the heat exchange coil 5. It is understood that each area of ​​the tunnel washing machine 100 may also be connected to a known main water supply line.

[0028] The water heat recovery device based on washing equipment provided by this invention collects water discharged from the rinsing zone 103 and the press dewatering machine 1 through a water collection tank 2, and transports it to the cold water chamber 202 of the distribution water tank 200 for replenishing water in the pre-wash zone 101. Simultaneously, the hot water chamber 201 of the distribution water tank 200 uses the heat from the condensation of high-temperature steam to raise the water temperature in the hot water chamber 201 to a suitable temperature for the main wash (e.g., from around 30°C to 60-70°C), thus providing preheated washing water for the main wash zone 102, significantly reducing the energy consumption required for steam heating during the main wash process. A one-way valve 3 between the cold water chamber 202 and the hot water chamber 201 ensures that water can only flow from the cold water chamber 202 to the hot water chamber 201, achieving automatic water balance and replenishment. The entire device has a compact structure, realizes multi-stage recovery and utilization of wastewater and waste heat, and has significant energy-saving effects.

[0029] According to one embodiment of this application, a tunnel-type washing machine 100 includes a plurality of (e.g., 3 to 4) pre-wash chambers 104, a plurality of (e.g., 5 to 7) main wash chambers 105, and (e.g., 3 to 4) a plurality of rinsing chambers 106. The plurality of pre-wash chambers 104 are connected sequentially in a pre-wash zone 101, the plurality of main wash chambers 105 are connected sequentially in a main wash zone 102, and the plurality of rinsing chambers 106 are connected sequentially in a rinsing zone 103. The last pre-wash chamber 104 of the plurality of sequentially connected pre-wash chambers 104 is connected to the first main wash chamber 105 of the plurality of sequentially connected main wash chambers 105, and the last main wash chamber 105 of the plurality of sequentially connected main wash chambers 105 is connected to the first rinsing chamber 106 of the plurality of sequentially connected rinsing chambers 106. The swaying angle of the pre-wash chambers 104, main wash chambers 105, and rinsing chambers 106 is approximately 230°, thereby achieving efficient exchange of clothes and washing water and separation of stains.

[0030] According to a specific embodiment of this application, during the pre-washing process, only cold water is added to the pre-washing zone 101 to remove water-soluble substances from the sheets, quilts, or clothes, as well as dust, lint, and other impurities. Additionally, the pre-washing process also acts as a soaking agent, causing these impurities to swell, especially some protein-based substances. The water from the pre-wash is discarded. Detergent and warm water are added to each main wash compartment 105 in the main wash zone 102. The temperature in each compartment is gradually increased and maintained, typically requiring about 12 minutes for the main wash.

[0031] According to one embodiment of this application, the water heat recovery device based on the washing equipment further includes a dryer 6 and an ironing machine 7. Both the dryer 6 and the ironing machine 7 have condensate drain outlets. The condensate drain outlets of the dryer 6 and the ironing machine 7 are connected to the water vapor condensate recovery pipe 4. The high-temperature water vapor condensate comes from the condensate discharged from the dryer 6 and the ironing machine 7 during operation, which can efficiently utilize the waste heat generated by the dryer 6 and the ironing machine 7 during operation.

[0032] According to one embodiment of this application, the water heat recovery device based on the washing equipment further includes a boiler 8 and an economizer 9, with the outlet of the heat exchange coil 5 connected to the inlet of the boiler 8 and the outlet of the boiler 8 connected to the inlet of the economizer 9.

[0033] According to one embodiment of this application, the drain outlet of the rinsing zone 103 is connected to the inlet of the water collection tank 2 through the first pipe 10, the drain outlet of the press dewatering machine 1 is connected to the inlet of the water collection tank 2 through the second pipe 11, the outlet of the water collection tank 2 is connected to the cold water chamber 202 through the third pipe 12, the cold water chamber 202 is connected to the inlet of the pre-washing zone 101 through the fourth pipe 13, the hot water chamber 201 is connected to the inlet of the main washing zone 102 through the fifth pipe 14, the condensate outlet of the dryer 6 is connected to the steam condensate recovery pipe 4 through the sixth pipe 15, the condensate outlet of the ironing machine 7 is connected to the steam condensate recovery pipe 4 through the seventh pipe 16, and the outlet of the heat exchange coil 5 is connected to the inlet of the boiler 8 through the eighth pipe 17. The water heat recovery device based on the washing equipment also includes a first valve 18 installed on the first pipeline 10, a second valve 19 installed on the second pipeline 11, a third valve 20 installed on the third pipeline 12, a fourth valve 21 installed on the fourth pipeline 13, a fifth valve 22 installed on the fifth pipeline 14, a sixth valve 23 installed on the sixth pipeline 15, a seventh valve 24 installed on the seventh pipeline 16, and an eighth valve 25 installed on the eighth pipeline 17.

[0034] According to one embodiment of this application, the water heat recovery device based on the washing equipment further includes a main controller, a first temperature sensor disposed in the cold water chamber 202, and a second temperature sensor disposed in the hot water chamber 201. The first valve 18, second valve 19, third valve 20, fourth valve 21, fifth valve 22, sixth valve 23, seventh valve 24, and eighth valve 25 are all electrically controlled valves. The first temperature sensor, the second temperature sensor, the first valve 18, the second valve 19, the third valve 20, the fourth valve 21, the fifth valve 22, the sixth valve 23, the seventh valve 24, and the eighth valve 25 are all signal-connected to the main controller. The first temperature sensor is used to monitor the water temperature in the cold water chamber 202, and the second temperature sensor is used to monitor the water temperature in the hot water chamber 201. The main controller can automatically control the opening and closing of each valve and the opening degree according to a preset temperature threshold and liquid level logic, thereby optimizing water distribution and heat exchange efficiency.

[0035] Considering that the washing wastewater may contain impurities such as lint, cotton fibers, and thread ends, directly feeding it into the distribution tank 200 may clog the pipes or affect the heat exchange effect. Therefore, this embodiment adds a filtration stage at the inlet of the water collection tank 2. According to a preferred embodiment of this application, the water heat recovery device based on the washing equipment includes a filter pipe 26 and a filter 300 installed on the filter pipe 26. The drain outlets of the rinsing zone 103 and the press dewatering machine 1 are connected to the inlet of the water collection tank 2 through the filter pipe 26. Specifically, the first pipe 10 and the second pipe 11 are both connected to the filter pipe 26. The filter 300 includes a filter cylinder 301 and a filter switching assembly. The filter cylinder 301 has a filter cylinder inlet 30. 2. The filter cartridge outlet 303 and filter cartridge inlet 302 are connected to the drain outlet of the rinsing zone 103 and the drain outlet of the press dewatering machine 1. The filter cartridge outlet 303 is connected to the inlet of the water collection tank 2. The filtration switching assembly includes a rotating shaft 304 and four filter plates 305 connected sequentially at 90° equal angles to the outer circumference of the rotating shaft 304. The filter plates 305 are provided with filter holes 318 and filter hole blocking mechanisms. The filter plates 305 are preferably detachably installed on the rotating shaft 304. Any one of the four filter plates 305 can be in the filtration working position. The filter plate 305 in the filtration working position is vertically arranged and located directly below the filter plate 305 at a 180° angle to it. The three filter plates 305 not in the filtration working position are... 05 are in sealed contact with the filter cartridge 301. The filter holes 318 of the filter plate 305 in the filtration working position are not blocked by the corresponding filter hole blocking mechanism. The filter holes 318 of the three filter plates 305 not in the filtration working position are blocked by the corresponding filter hole blocking mechanism to prevent the water flow in the filter cartridge from contaminating the filter holes 318 of the three filter plates 305 not in the filtration working position. This ensures that the filter plates 305 switched to the filtration working position later have not been used or have been basically unused. The two adjacent filter plates 305 in the filtration working position and the filter cartridge 301 form a filter cavity 317. The filter cartridge inlet 302 and the filter cartridge outlet 303 are respectively connected to the filter cavity 317. The filter plate 305 is located inside the filter chamber 317 and between the filter cartridge inlet 302 and the filter cartridge outlet 303. The filter 300 includes an elastic retaining mechanism disposed inside the filter cartridge 301. When the fluid entering the filter chamber 317 from the filter cartridge inlet 302 flows out through the filter plate 305 in the filtration working position and the filter cartridge outlet 303, if the resistance of the filter plate 305 in the filtration working position to the fluid is less than a predetermined value, the elastic retaining mechanism will limit the filter plate 305 in the filtration working position to the filtration working position. If the resistance of the filter plate 305 in the filtration working position to the fluid is greater than or equal to the predetermined value, the filter plate 305 in the filtration working position will rotate toward the filter cartridge outlet 303 under the push of the fluid.

[0036] According to a preferred embodiment of this application, a filter hole blocking mechanism is provided on both sides of the filter plate 305 in the thickness direction, which can completely block both ends of the filter hole 318 of the filter plate 305, further ensuring that the water flow in the filter cylinder 301 contaminates the filter holes 318 of the three filter plates 305 that are not in the filtration working position.

[0037] According to a specific embodiment of this application, the filter hole blocking mechanism includes a blocking plate 306 slidably connected to the filter plate 305. The blocking plate 306 is elastically engaged with the filter plate 305 via a first elastic member. The blocking plate 306 is connected to a first magnetic member 308, such as a magnetic rod. The upper inner side of the filter cylinder 301 is covered with a second magnetic member 309 (such as a whole magnetic plate). The blocking plates 306 on the filter plates 305 in the working position are positioned above the corresponding filter holes 318 under the traction force of the corresponding first elastic member. The first magnetic members 308 on the filter plates 305 not in the working position are magnetically attracted by the second magnetic members 309, so as to drive the corresponding blocking plates 306 to slide against the traction force of the corresponding first elastic members and block the corresponding filter holes 318. Specifically, each filter plate 305... The filter plate 305 has multiple rows of filter holes 318. Each row of filter holes 318 is equipped with a baffle plate 306. The baffle plates 306 are connected by a connecting rod 310. The end of the connecting rod 310 is connected to a first magnetic suction member 308. A sliding mating cavity 311 is formed on the filter plate 305. The connecting rod 310 has a sliding rod 312 that extends into the sliding mating cavity 311 and is slidably limited in the sliding mating cavity 311. The first elastic member is a first spring 307 installed in the sliding mating cavity 311. One end of the first spring 307 is connected to the inner wall of the sliding mating cavity 311, and the other end of the first spring 307 is connected to the sliding rod 312. Specifically, the sliding rod 312 is a T-shaped rod. The cross-section of the sliding mating cavity 311 is a T-shape that matches the T-shaped rod, so that the T-shaped head of the sliding rod 312 is slidably limited in the sliding mating cavity 311.

[0038] According to a specific embodiment of this application, grooves 313 are formed on both sides of the filter plate 305 in the width direction. The elastic holding mechanism includes a locking head 316 that is telescopically disposed inside the filter cylinder 301 by a second elastic member. The locking head 316 is inserted into the groove 313 of the filter plate 305 in the filtration working position by the pushing force of the second elastic member. A telescopic cavity 315 is formed inside the filter cylinder 301. The second elastic member is a second spring 314 installed in the telescopic cavity 315. One end of the second spring 314 is connected to the bottom wall of the telescopic cavity 315, and the other end of the second spring 314 is connected to the locking head 316. The end of the locking head 316 facing the groove 313 forms an arc-shaped convex surface. The locking head 316 moves telescopically along the axial direction of the rotating shaft 304 by the elastic force of the second spring 314. The resistance of the filter plate 305 in the filtration working position to the fluid is greater than or equal to When the preset value is reached, the force of the filter plate 305 pressing the clamp 316 increases, causing the clamp 316 to overcome the elastic force of the second spring 314 and retract into the telescopic cavity 315. In this way, the clamp 316 is no longer stuck in the groove 313 of the filter plate 305 in the filtration working position. Driven by the fluid, it rotates toward the filter cartridge outlet 303. The other filter plate 305 that was originally adjacent will rotate to the filtration working position to continue to perform filtration work. This can ensure the working stability and continuity of the filter 300, without the need for frequent replacement of the filter plate 305, and can realize the automatic replacement (switching) of the filter plate 305. When the originally blocked filter plate 305 rotates to the top position of the four filter plates 305, it enters the position to be replaced. An inspection door can be opened at the top of the filter cartridge 301 to facilitate the replacement of the top blocked filter plate 305 of the four filter plates 305.

[0039] According to a specific embodiment of this application, the upper part of the filter cylinder 301 forms a cavity with a semi-circular cross-section, and the lower part of the filter cylinder 301 forms a cavity with a rectangular cross-section. Because the rotation trajectory of the four filter plates 305 is arc-shaped, this design can ensure that the three filter plates 305 not in the filtration working position are in sealed contact with the semi-circular cavity at the upper part of the filter cylinder 301.

[0040] It should be noted that the above embodiments only illustrate preferred embodiments of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting this application. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of this application, such as combining different features in various embodiments, and these should all fall within the protection scope of this application.

Claims

1. A water heat recovery device based on washing equipment, characterized in that, The water heat recovery device based on the washing equipment includes: A tunnel-type washing machine and a press dehydrator, wherein the tunnel-type washing machine includes a pre-wash zone, a main wash zone, and a rinsing zone connected in sequence; A water collection tank, the water inlet of which is connected to the drain outlet of the rinsing area and the drain outlet of the press dewatering machine, respectively; A distribution tank has a hot water chamber and a cold water chamber separated from each other. The cold water chamber is connected to the hot water chamber through a one-way valve. The flow direction of the one-way valve is from the cold water chamber to the hot water chamber. The cold water chamber is connected to the outlet of the water collection tank and the inlet of the pre-wash area. The hot water chamber is connected to the inlet of the main wash area. A steam condensate recovery pipe and a heat exchange coil located in the hot water chamber, wherein the steam condensate recovery pipe is connected to the inlet of the heat exchange coil.

2. The water heat recovery device based on washing equipment according to claim 1, characterized in that, The tunnel-type washing machine includes multiple pre-wash compartments, multiple main wash compartments, and multiple rinsing compartments. The multiple pre-wash compartments are connected sequentially in the pre-wash area, the multiple main wash compartments are connected sequentially in the main wash area, and the multiple rinsing compartments are connected sequentially in the rinsing area. The last pre-wash compartment in the sequentially connected multiple pre-wash compartments is connected to the first main wash compartment in the sequentially connected multiple main wash compartments, and the last main wash compartment in the sequentially connected multiple main wash compartments is connected to the first rinsing compartment in the sequentially connected multiple rinsing compartments.

3. The water heat recovery device based on washing equipment according to claim 1, characterized in that, The water heat recovery device based on the washing equipment also includes a dryer and an ironing machine. Both the dryer and the ironing machine have condensate drain outlets, and the condensate drain outlets of the dryer and the ironing machine are connected to the water vapor condensate recovery pipe.

4. The water heat recovery device based on washing equipment according to claim 3, characterized in that, The water heat recovery device based on the washing equipment also includes a boiler and an economizer. The outlet of the heat exchange coil is connected to the inlet of the boiler, and the outlet of the boiler is connected to the inlet of the economizer.

5. The water heat recovery device based on washing equipment according to claim 4, characterized in that, The drain outlet of the rinsing zone is connected to the inlet of the water collection tank via a first pipe; the drain outlet of the press dewatering machine is connected to the inlet of the water collection tank via a second pipe; the outlet of the water collection tank is connected to the cold water chamber via a third pipe; the cold water chamber is connected to the inlet of the pre-washing zone via a fourth pipe; the hot water chamber is connected to the inlet of the main washing zone via a fifth pipe; the condensate outlet of the dryer is connected to the steam condensate recovery pipe via a sixth pipe; the condensate outlet of the ironing machine is connected to the steam condensate recovery pipe via a seventh pipe; and the outlet of the heat exchange coil is connected to the inlet of the boiler via an eighth pipe. The water heat recovery device based on the washing equipment further includes a first valve installed on the first pipeline, a second valve installed on the second pipeline, a third valve installed on the third pipeline, a fourth valve installed on the fourth pipeline, a fifth valve installed on the fifth pipeline, a sixth valve installed on the sixth pipeline, a seventh valve installed on the seventh pipeline, and an eighth valve installed on the eighth pipeline.

6. The water heat recovery device based on washing equipment according to claim 5, characterized in that, The water heat recovery device based on the washing equipment also includes a main controller, a first temperature sensor installed in the cold water chamber, and a second temperature sensor installed in the hot water chamber. The first valve, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve, the seventh valve, and the eighth valve are all electrically controlled valves. The first temperature sensor, the second temperature sensor, the first valve, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve, the seventh valve, and the eighth valve are all signal connected to the main controller.

7. The hydrothermal recovery device based on a washing equipment according to any one of claims 1 to 6, characterized in that, The water heat recovery device based on the washing equipment includes a filtration pipeline and a filter installed on the filtration pipeline. The drain outlet of the rinsing zone and the drain outlet of the press dewatering machine are connected to the inlet of the water collection tank through the filtration pipeline. The filter includes a filter cylinder and a filter switching assembly. The filter cylinder has a filter cylinder inlet and a filter cylinder outlet. The filter cylinder inlet is connected to the drain outlet of the rinsing zone and the drain outlet of the press dewatering machine. The filter cylinder outlet is connected to the inlet of the water collection tank. The filter switching assembly includes a rotating shaft and four filter plates connected sequentially to the outer circumference of the rotating shaft at 90° equal angles. The filter plates are provided with filter holes and filter hole blocking mechanisms. Any one of the four filter plates can be in the filtration working position. The filter plate in the filtration working position is vertically arranged and located directly below the filter plate forming a 180° angle with it. The three filter plates not in the filtration working position are in sealed contact with the filter cylinder. The filter holes of the filter plate are not blocked by the corresponding filter hole blocking mechanism. The filter holes of the three filter plates not in the filtration working position are blocked by the corresponding filter hole blocking mechanism. The two adjacent filter plates in the filtration working position and the filter cylinder form a filtration cavity. The filter cylinder inlet and filter cylinder outlet are respectively connected to the filtration cavity. The filter plate in the filtration working position is located in the filtration cavity and between the filter cylinder inlet and the filter cylinder outlet. The filter includes an elastic holding mechanism disposed on the inner side of the filter cylinder. When the fluid entering the filtration cavity from the filter cylinder inlet flows out through the filter plate in the filtration working position and the filter cylinder outlet, if the resistance of the filter plate in the filtration working position to the fluid is less than a predetermined value, the elastic holding mechanism limits the filter plate in the filtration working position to the filtration working position. If the resistance of the filter plate in the filtration working position to the fluid is greater than or equal to the predetermined value, the filter plate in the filtration working position rotates towards the filter cylinder outlet under the push of the fluid.

8. The water heat recovery device based on washing equipment according to claim 7, characterized in that, The filter hole blocking mechanism includes a blocking plate slidably connected to the filter plate. The blocking plate is elastically engaged with the filter plate through a first elastic member. The blocking plate is connected to a first magnetic member. The upper inner side of the filter cylinder is covered by a second magnetic member. The blocking plates on the filter plates in the working position of the four filter plates are positioned above the corresponding filter holes under the traction force of the corresponding first elastic member. The first magnetic members on the filter plates not in the working position are magnetically attracted by the second magnetic member, so as to drive the corresponding blocking plates to slide against the traction force of the corresponding first elastic member and block the corresponding filter holes.

9. The water heat recovery device based on washing equipment according to claim 8, characterized in that, The filter plate has grooves formed on both sides in the width direction. The elastic retaining mechanism includes a locking head that is retractably disposed inside the filter cylinder by a second elastic member. The locking head is engaged into the groove of the filter plate in the filtration working position by the thrust of the second elastic member.

10. The water heat recovery device based on washing equipment according to claim 8, characterized in that, The upper part of the filter cylinder forms a cavity with a semi-circular cross-section, and the lower part of the filter cylinder forms a cavity with a rectangular cross-section.

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