Multi-stage multi-source heat pump heat recovery instant hot water and shower room moisture-proof device

Abstract

The invention discloses a multi-stage multi-source heat pump heat recovery instant hot water and shower room moisture-proof device, comprising a heat recovery device, a dehumidification device, and a filtering device. The heat recovery device comprises a plate condenser, a compressor, a liquid collector, a first drying filter, a preheating coil heat exchanger, a backwashing filter, a wastewater pump, a primary plate exchanger, a flow regulating valve, a preheating water tank, a tap water inlet pipe and a shower head. The plate condenser, the compressor, the liquid collector, the first drying filter, and the preheating coil heat exchanger are connected through pipelines to form a refrigerant circulation system. The backwashing filter, the wastewater pump, the primary plate exchanger and the plate condenser are connected through pipelines to form a wastewater circulation system. The flow regulating valve, the tap water inlet pipe, the preheating water tank, the shower head, the plate condenser and the primary plate exchanger are connected through pipelines to form a hot water circulation system. The invention realizes "instant heating" of the hot water system, can recover exhaust air waste heat and waste water waste heat, and realizes multi-stage automatic filtration of waste water.

Description

Technical Field

[0001] The invention relates to the field of integrated hot water and moisture-proof system devices, and in particular to a multi-stage multi-source heat pump heat recovery instant hot water and shower room moisture-proof device. Background Art

[0002] Water heaters are essential equipment in people's daily lives. The energy consumed by hot water production accounts for 20-30% of building energy consumption. With the development of my country's economic level and the improvement of people's living standards, the demand for hot water will increase day by day, and the resulting energy consumption cannot be underestimated. At present, in places with large hot water demand such as residences and hotels in my country, hot water preparation devices have gradually changed from energy-consuming electric water heaters and gas water heaters to more energy-saving air energy heat pump water heaters and solar water heaters.

[0003] However, although air-source heat pump water heaters are relatively energy-efficient, they are less effective in winter, especially in the high-humidity areas of central and southern China. The operating efficiency drops sharply due to the frost on the external unit. At the same time, their heating rate is slow, and they require a large-capacity water storage device to store hot water. This results in their large size, high cost, and large heat loss. Solar water heaters are limited by weather conditions and require additional electric heating to prepare hot water on rainy days. Their overall energy-saving benefits are comparable to those of air-source heat pump water heaters.

[0004] In order to seek a more efficient hot water preparation device, the heat recovery of bathing wastewater has attracted the attention of many scholars, engineers and enterprises. Bathing wastewater has a high temperature (for example, when the water supply temperature is 42°C, the wastewater temperature can reach 28-35°C), and has great heat recovery potential. And wastewater heat recovery is not restricted by weather, the operating efficiency is stable all year round, and the energy-saving benefits are very significant, which provides conditions for low-power instant hot water supply. At present, there are many systems and devices for bathing wastewater heat recovery using heat exchangers, heat pump devices, heat pipes, etc., such as: a waste hot water waste heat recovery heat pump water heater (CN201410060347.5), a waste heat recovery device and a heat pump water heater (CN201721345770.5), a variety of waste heat recovery water heaters (CN201210485522.6), etc. However, up to now, the existing patents have solved the problem of heat recovery in the stage of stable hot water supply and stable wastewater discharge, and all retain bulky water storage devices. There are still many key technical difficulties in realizing instant, miniaturized and functionally integrated hot water supply devices that have not been properly resolved:

[0005] (1) Thermal imbalance in the initial stage of hot water supply. When the user turns on the hot water device (within 1 minute), the wastewater discharge flow rate gradually increases due to the flow resistance of the open channel, that is, there is a time difference in the balance between the hot water supply flow rate and the wastewater discharge flow rate; on the other hand, due to the low initial air temperature and the temperature of the surrounding structure such as the floor, the initial wastewater discharge temperature gradually increases. Due to the above two "imbalances", it is very difficult to use heat recovery to achieve "instant heating"; how to overcome the initial flow and thermal imbalance and achieve the "instant heating" technical effect is one of the technical difficulties.

[0006] (2) Thermal imbalance during the stable water supply stage. When the water supply enters the stable stage, the wastewater discharge flow and temperature are also basically stable. However, at this time, the recoverable heat in the wastewater accounts for about 70% of the total heat supply, and the remaining 20% ​​is taken away by exhaust, and 10% is lost through heat transfer of the enclosure structure. It can be seen that even if the discharge flow and temperature of wastewater heat recovery are stable, there is still a heat imbalance, and the additional heat needs to be supplemented by electrical energy conversion. How to increase the heat recovery amount and reduce the consumption of electricity is one of the key technical difficulties.

[0007] (3) The water quality problem of bathing wastewater. Bathing wastewater contains a large amount of hair, mud, grease, etc. If it is not properly treated, it will cause problems such as blockage and corrosion of the heat exchanger, and ultimately affect its service life. The existing solutions are, first, to avoid wastewater treatment and use large channels, smooth tubes and other heat exchange equipment that are not easy to clog. This solution will inevitably lead to low efficiency and large size of the heat exchanger; the second is to use multi-stage filtration to purify the wastewater and ultimately make its water quality meet the requirements of high-efficiency heat exchangers (such as plate heat exchangers, shell and tube heat exchangers, etc.), but this solution requires frequent replacement of the filter device, which is inconvenient to use. How to achieve low-cost and automated water quality treatment is another key technical difficulty.

[0008] (4) The coupling problem between hot water supply and dehumidification system. Bathing space is the place with the largest amount of moisture produced. Due to unreasonable humidity control, the wall decoration and ceiling decoration near the bathroom are often damaged by mold. This phenomenon of decoration damage caused by large amounts of moisture produced in the bathing space is very common in central and southern my country, especially in hotels, guesthouses, apartments and other places. At present, the solution to this problem is to add additional dehumidifiers. However, additional equipment and investment are required, which is difficult for ordinary families and ordinary hotels to afford. Combining the hot water supply device with the dehumidification system can not only improve the system efficiency, but also reduce the investment cost. How to achieve efficient coupling between the hot water supply device and the dehumidification system is also a technical difficulty. Summary of the invention

[0009] The present invention provides a multi-stage multi-source heat pump heat recovery instant hot water and shower room moisture-proof device, which can realize the "instant heating" of the hot water system, can recover the exhaust air waste heat and the waste water waste heat, realize the multi-stage automatic filtration and backwashing treatment of the waste water, and also has the dehumidification function.

[0010] To achieve the above-mentioned purpose, the present invention provides the following scheme: The present invention provides a multi-stage multi-source heat pump heat recovery instant hot water and shower room moisture-proof device, including a heat recovery device, a dehumidification device, and a filtering device. The heat recovery device includes a plate condenser, a compressor, a liquid collector, a first drying filter, a preheating coil heat exchanger, a backwashing filter, a wastewater pump, a primary plate exchanger, a flow regulating valve, a preheating water tank, a tap water inlet pipe and a shower head. The plate condenser, the compressor, the liquid collector and the first drying filter, the preheating coil heat exchanger are connected by pipelines to form a refrigerant circulation system. The backwashing filter, the wastewater pump, the primary plate exchanger and the plate condenser are connected by pipelines to form a wastewater circulation system. The flow regulating valve, the tap water inlet pipe, the preheating water tank, the shower head, the plate condenser and the primary plate exchanger are connected by pipelines to form a hot water circulation system. The front end of the dehumidification device is connected with an air inlet through an air duct, and the rear end of the dehumidification device is connected by an air duct. The air supply pipe and the exhaust pipe are respectively connected, the air supply pipe is connected to the air supply port, the air supply pipe is equipped with an air supply valve, the exhaust pipe is connected to the exhaust port, the exhaust valve is equipped on the exhaust pipe, the front end of the second filter is connected to the water outlet faucet through a water pipe, and the rear end of the second filter is connected to the valve through a water pipe. The dehumidification device includes a second drying filter, the second drying filter is connected to a refrigerant pipe, and the refrigerant pipe is connected to a preheating coil heat exchanger. The filtering device includes a water collecting tank, one end of the water collecting tank is connected to a wastewater outlet pipe, and the wastewater outlet pipe is connected to a backwash filter, the other end of the water collecting tank is connected to a wastewater inlet pipe, one end of the wastewater inlet pipe is connected to a wastewater pipe, and the wastewater pipe is connected to a plate evaporator. A filtering part is provided on the top of the water collecting tank, and the other end of the wastewater inlet pipe is connected to the filtering part. A drain pipe is inserted at the bottom of the water collecting tank, and a liquid level sensor is provided on the inner wall of the water collecting tank.

[0011] Preferably, the plate condenser is respectively connected to a first solenoid valve group and a second solenoid valve group through pipelines, the first solenoid valve group includes a first solenoid valve and a second solenoid valve, the first solenoid valve is connected to a compressor through a pipeline, the compressor is connected to a liquid collector through a pipeline, the liquid collector is respectively connected to a first one-way valve and a second one-way valve through pipelines, the first one-way valve is connected to a plate evaporator through a pipeline, the plate evaporator is connected to a first expansion valve through a pipeline, the first expansion valve is connected to a first drying filter through a pipeline, and the second one-way valve is connected to a fin evaporator of a dehumidification device through a refrigerant pipeline.

[0012] Preferably, the second solenoid valve group includes a third solenoid valve and a fourth solenoid valve, the third solenoid valve is connected to a fin tube condenser of a dehumidification device through a refrigerant pipeline; the fourth solenoid valve is connected to a preheating coil heat exchanger through a pipeline.

[0013] Preferably, the backwash filter is connected to a wastewater pump via a pipeline, the wastewater pump is connected to a primary plate heat exchanger via a pipeline, and the primary plate heat exchanger is connected to a plate evaporator via a pipeline.

[0014] Preferably, the tap water inlet pipe is connected to the primary plate exchanger, the plate condenser is respectively connected to a flow regulating valve and a preheating water tank through pipelines, the flow regulating valve and the preheating water tank are respectively connected to a hot water pipe, a temperature control mixing valve is provided on the hot water pipe, and the hot water pipe is connected to a shower.

[0015] Preferably, the dehumidification device further comprises a second expansion valve, a fan, a fin-tube evaporator and a refrigerant pipeline, and the fin-tube evaporator is respectively connected to the second expansion valve and the drying filter.

[0016] Preferably, the filter part includes a primary filter screen, an upper cover plate, an outer shell, a cylindrical filter screen and a brush. The outer shell is fixed to the top of the water collecting tank, the primary filter screen is fixed in the outer shell, the bottom of the primary filter screen is fixed to the upper cover plate, the bottom of the upper cover plate is fixed to the cylindrical filter screen, the cylindrical filter screen is movably connected in the water collecting tank, a water collecting trough is provided in the cylindrical filter screen, and the brush is fixed to the inner wall of the outer shell of the water collecting tank.

[0017] Preferably, the cylindrical filter screen is sleeved with a drum, the water collecting tank is sleeved in the drum, the first support tube and the second support tube are respectively fixed at both ends of the water collecting tank, the first support tube and the second support tube are respectively fixed to the inner wall of the shell, the water collecting tank comprises an upper tank and a lower tank, the upper tank is fixed to the lower tank, the upper tank is provided with a first outlet hole at one end close to the first support tube, the lower tank is provided with a second outlet hole at one end, the wastewater inlet pipe is inserted in the second outlet hole, a strip seam is provided on one side of the lower tank, the wastewater in the upper tank flows into the water collecting box on one side through the first support tube, and the first outlet hole is integrally formed with the first support tube.

[0018] Preferably, a plurality of water retaining strips are fixed on the inner wall of the cylindrical filter screen.

[0019] The present invention discloses the following technical effects:

[0020] (1) The unit can be miniaturized: high-efficiency heat exchangers such as plate heat exchangers are used as heat recovery and heat exchange components. The system is compact and small in size (equivalent to the size of a gas water heater), making it easy to install;

[0021] (2) It can achieve instant heating effect, avoid heat loss of large-capacity water storage devices, have high energy utilization efficiency, and be easy to use;

[0022] (3) It adopts three-stage filtration and purification, in which the first-stage filtration device can be cleaned or replaced regularly by the user, and the second-stage and third-stage filtration devices can be automatically cleaned without the need to replace parts;

[0023] (4) It can realize exhaust heat recovery, using the large amount of heat energy contained in the air in the bathing space at the end of the bathing period to preheat the small insulation water tank on the one hand, and quickly remove the high humidity air in the bathing space on the other hand, improving the sanitary conditions;

[0024] (5) The dehumidification function can be realized. The device can be used to dehumidify the air, especially in the high humidity areas in central and southern my country, which can effectively control the "return of dampness in the south" effect and improve the overall sanitary conditions of the room;

[0025] (6) The present invention utilizes multi-stage and multi-source heat recovery, and its overall energy efficiency ratio is high, which can be as high as 8.0 or more in summer, 7 or more in transitional seasons, and 5.5 or more in winter. The average power consumption of the device can be controlled at about 800W. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the pipeline connection of the overall structure of the present invention;

[0029] Figure 3 It is a schematic diagram of the structure of the heat recovery device of the present invention;

[0030] Figure 4 It is a schematic diagram of the structure of the dehumidification device of the present invention;

[0031] Figure 5 It is a schematic diagram of the structure of the filtering device of the present invention;

[0032] Figure 6 It is a schematic diagram of the layered structure of the filtering device of the present invention;

[0033] Figure 7 It is a schematic diagram of the water collecting tank structure of the present invention;

[0034] Figure 8It is a partial enlarged structural schematic diagram of the cylindrical filter screen of the present invention;

[0035] Fig. 9 This is a schematic diagram of the water collection pool structure of the present invention

[0036] Fig.10 This is a schematic diagram of the connection between the cylindrical filter and the roller of the present invention.

[0037] In the figure, 1 is a heat recovery device, 2 is a dehumidification device, 3 is a filtering device, 4 is an air inlet, 5 is a hot water pipe, 6 is a shower, 7 is a temperature-controlled mixing valve, 8 is an air supply valve, 9 is an exhaust valve, 10 is an exhaust port, 11 is a refrigerant pipeline, 12 is a control line, 13 is an air supply port, 14 is a waste water pipe, 1-1 is a compressor, 1-2 is a plate condenser, 1-3 is a first expansion valve, 1-4 is a plate evaporator, 1-5 is a primary plate exchanger, 1-6 is a preheating water tank, 1-7 is a recoil filter, 1-8 is a waste water pump, 1-9a is a first solenoid valve, 1-9b is a second solenoid valve, 1-10 is a liquid collector, 1-11a is a first check valve, 1-11b is a second check valve, 1-12 is a drying filter, 1-13 is an electric flow control valve, 1-14a is a third solenoid valve, 1-14b is a fourth solenoid valve, 1-15 is a preheating coil heat exchanger, 1-16 is a temperature sensor, 1-17 is an electric heater, 1-18 is a compressor start controller, 2-1 is a finned tube evaporator, 2-2 is a finned tube condenser, 2-3 is a second expansion valve, 2-4 is a drying filter, 2-5a / b is a one-way valve, 2-6 is a humidity sensor, 2-7 is a temperature sensor, 2-8 is a fan, 3-1 is a primary filter, 3-2 is an upper cover plate, 3-3 is a shell, 3-4 is a cylindrical filter screen, 3-5 is a water collection tank, 3-6 is a brush, 3-7 is a water collection tank, 3-8 is a wastewater outlet pipe, 3-9 is a wastewater inlet pipe, 3-10 is a seam, 3-11 is a water retaining bar, 3-12 is a drain pipe, 3-13 is a roller, 3-14a is a first supporting pipe section, 3-14b is a second supporting pipe section, and 3-15 is a liquid level sensor. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] Reference Figure 1-10The present invention discloses a multi-stage multi-source heat pump heat recovery instant hot water and shower room moisture-proof device, which includes a heat recovery device 1, a dehumidification device 2, a filter device 3, and an air duct, a water pipe and a refrigerant pipe connecting the three devices. The filter device is connected to the heat recovery device 3 through a wastewater pipe 14 and a control line 12. After the high-temperature waste water from bathing is treated by the filter device 3, it enters the heat recovery device 1 through the wastewater pipe 14, completes the heat recovery and becomes low-temperature waste water, then enters the filter device 3 through the wastewater pipe, and finally enters the drainage system through the drain pipe. The tap water inlet pipe is connected to the heat recovery device 1, and the tap water becomes hot water after being heated. The hot water is sequentially sent to the bathing space through a temperature-controlled mixing valve 7, a hot water pipe 5, and a shower head 6; the dehumidification device 2 is connected to the heat recovery device 1 through a refrigerant pipe 11 and a control line 12. Along the airflow direction, the front end of the dehumidification device 2 is connected to the air inlet 4 through the air duct, and the rear end is divided into two paths after passing through the air duct. One path is the air supply duct, and the air supply valve 8 and the air supply port 13 are installed in sequence along the airflow direction; the other path is the exhaust duct, and the exhaust valve 9 and the exhaust port 10 are installed in sequence along the airflow direction.

[0041] Combination Figure 1 and Figure 3 A specific implementation of the hot water preparation mode is described.

[0042] In the hot water preparation mode, the first solenoid valve 1-9a is turned on and the second solenoid valve 1-9b is turned off. In the initial stage of hot water, the hot water pre-stored in the preheating water tank 1-6 supplies water. At this time, the flow control valve 1-13 is in the off state. When the liquid level sensor 3-15 in the sump 3-7 monitors that the water level reaches the high setting value, it sends a signal to start the wastewater pump 1-8 and the compressor 1-1 in sequence to start heat recovery. After 30-50 seconds of heat recovery operation, the water temperature at the outlet of the plate condenser 1-2 tends to stabilize. At this time, the hot water pre-stored in the preheating water tank is about to be exhausted, and the hot water temperature monitored by the temperature sensor 1-16 decreases. At this time, the electric flow control valve is fully opened, and the hot water at the outlet of the preheating water tank 1-6 is replaced by the hot water at the outlet of the plate condenser 1-2. When the electric flow regulating valve is in the fully open state, if the water temperature monitored by the temperature sensor 1-16 is still lower than the set value, the electric heater 1-17 is turned on, and the opening of the electric flow regulating valve 1-13 is gradually reduced; if the water temperature monitored by the temperature sensor 1-16 is still higher than the set value, the hot water temperature is controlled by adjusting the ratio of cold and hot water through the temperature control mixing valve 7. Through the above control scheme, accurate adjustment of hot water temperature and stable supply of hot water can be achieved.

[0043] In the hot water preparation mode, when the user suddenly stops the hot water, the compressor 1-1 stops running, and the wastewater pump 1-8 continues to run until the water level in the sump 3-7 drops to the low setting value, and then stops running. At this time, the system is put into standby mode through the timing controller. When the timing exceeds 30 seconds, the system runs the exhaust heat recovery mode; when the timing does not reach 30 seconds, the user turns on the hot water again, the compressor starts immediately and continues to run the hot water preparation mode.

[0044] Combination Figure 1 and Figure 3 A specific implementation of the exhaust air heat recovery mode is described.

[0045] The operation of the exhaust heat recovery mode is to dehumidify or preheat the preheating water tank after bathing. When bathing is completed, the timing controller exceeds 30 seconds and enters the exhaust heat recovery mode. At this time, the exhaust valve 9 is opened, the air supply valve 8 is closed, and the first solenoid valve 1-9a is closed, the second solenoid valve 1-9b is opened, the third solenoid valve 1-14a is opened, and the fourth solenoid valve 1-14b is closed. The fan 2-8 is adjusted to a high gear, and the compressor 1-1 is turned on. By running the exhaust heat recovery mode, the water in the preheating water tank is heated to a preset high temperature of 70°C. When the preset high temperature is reached, the compressor stops running, and the exhaust fan is adjusted to a low gear, and continues to run until the set time ends, for example, it can be set to 10 minutes. During the non-bathing period, when the water temperature in the preheating water tank drops to a low temperature of 50°C, the exhaust heat recovery mode is run to control the water temperature in the preheating water tank within the set range.

[0046] Combination Figure 1 and Figure 3 A specific implementation of the dehumidification mode is described.

[0047] In dehumidification mode, exhaust valve 9 is closed, air supply valve 8 is opened, solenoid valve 1-9a is closed, second solenoid valve 1-9b is opened, third solenoid valve 1-14a is closed, fourth solenoid valve 1-14b is opened, and fan 2-8 is adjusted to high speed. When temperature sensor 2-7 and humidity sensor 2-6 detect that indoor relative humidity is greater than set value, compressor 1-1 is turned on, high temperature and high pressure refrigerant gas at the outlet of compressor 1-1 enters fin tube condenser 2-2, high temperature and high pressure refrigerant gas is condensed into high temperature and high pressure refrigerant liquid after passing through fin tube condenser 2-2, and enters fin tube evaporator 2-1 after passing through drying filter 2-4 and expansion valve 2-3. In fin evaporator 2-1, refrigerant liquid is depressurized and evaporates and exchanges heat with air, so that air passes through fin tube evaporator 2-1 to achieve cooling and dehumidification effect, and air is heated after passing through fin tube condenser 2-2 and sent into the room to achieve dehumidification purpose.

[0048] Combination Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10 The specific implementation of the water quality treatment of the filtration device is described.

[0049] The filter device 3 is composed of a primary filter screen 3-1, an upper cover plate 3-2, a housing 3-3, a cylindrical filter screen (3-4), a water collection tank 3-5 and a brush 3-6. The bathing wastewater passes through the primary filter screen 3-1 and the upper cover plate 3-2 in sequence, then flows through the cylindrical filter screen 3-4, and is finally collected in the upper tank 3-5a of the water collection tank. One end of the upper tank 3-5a of the water collection tank is provided with a first outflow hole 3-5c with a semicircular opening. The bathing wastewater after secondary filtration flows into the water collection tank 3-7 through the first outflow hole 3-5c. One end of the water collection tank is connected to the wastewater outlet pipe 3-8, and the wastewater pipe is connected to the backwash filter 1-7 in the heat recovery device 1. After the heat recovery treatment, the low-temperature wastewater flows out from the plate evaporator 1-4 in the heat recovery device 1, and is connected to the wastewater inlet pipe 3-9 of the filter device through the wastewater pipe. The end of the wastewater inlet pipe 3-9 is provided with a semicircular second outflow hole 3-5d. The low-temperature wastewater flows through the semicircular second outflow hole 3-5d and enters the lower groove 3-5b of the water collection tank 3-5. The lower groove 3-5b has a strip slit 3-10 on one side. After the wastewater flows through the strip slit 3-10, it falls into the inside of the cylindrical filter screen 3-4. The inside of the cylindrical filter screen is set in a sawtooth shape, and a water retaining strip 3-11 is set on the tooth side. The cylindrical filter screen 3-4 is rotated by the driving force of the water flow. After flushing and cleaning with a brush 3-6 set on one side, the cylindrical filter screen 3-4 can achieve continuous filtration. After flushing, the low-temperature wastewater is finally discharged to the outside through the drain pipe 3-12.

[0050] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0051] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A multi-stage multi-source heat pump heat recovery instant hot water and shower room moisture-proof device, characterized in that: It includes a heat recovery device, a dehumidification device, and a filtering device. The heat recovery device includes a plate condenser, a compressor, a liquid collector, a first drying filter, a preheating coil heat exchanger, a backwash filter, a wastewater pump, a primary plate exchanger, a flow regulating valve, a preheating water tank, a tap water inlet pipe and a shower. The plate condenser, the compressor, the liquid collector, the first drying filter, and the preheating coil heat exchanger are connected through pipelines to form a refrigerant circulation system. The backwash filter, the wastewater pump, the primary plate exchanger and the plate condenser are connected through pipelines to form a wastewater circulation system. The flow regulating valve, the tap water inlet pipe, the preheating water tank, the shower, the plate condenser and the primary plate exchanger are connected through pipelines to form a hot water circulation system. The front end of the dehumidification device is connected to an air inlet through an air duct, and the rear end of the dehumidification device is respectively connected through air ducts. There are air supply pipes and exhaust pipes, the air supply pipe is connected to an air supply port, the air supply pipe is equipped with an air supply valve, the exhaust pipe is connected to an exhaust port, the exhaust pipe is equipped with an exhaust valve, the dehumidification device includes a second drying filter, the second drying filter is connected to a refrigerant pipeline, the refrigerant pipeline is connected to a preheating coil heat exchanger, the filtering device includes a water collecting tank, one end of the water collecting tank is connected to a wastewater outlet pipe, the wastewater outlet pipe is connected to a backwash filter, the other end of the water collecting tank is connected to a wastewater inlet pipe, one end of the wastewater inlet pipe is connected to a wastewater pipe, the wastewater pipe is connected to a plate evaporator, a filtering part is provided on the top of the water collecting tank, the other end of the wastewater inlet pipe is connected to the filtering part, a drain pipe is plugged into the bottom of the water collecting tank, and a liquid level sensor is provided on the inner wall of the water collecting tank; The plate condenser is respectively connected to a first solenoid valve group and a second solenoid valve group through pipelines, the first solenoid valve group includes a first solenoid valve and a second solenoid valve, the first solenoid valve is connected to a compressor through a pipeline, the compressor is connected to a liquid collector through a pipeline, the liquid collector is respectively connected to a first check valve and a second check valve through pipelines, the first check valve is connected to a plate evaporator through a pipeline, the plate evaporator is connected to a first expansion valve through a pipeline, the first expansion valve is connected to a first drying filter through a pipeline, and the second check valve is connected to a fin evaporator of a dehumidification device through a refrigerant pipeline; The second solenoid valve group includes a third solenoid valve and a fourth solenoid valve, wherein the third solenoid valve is connected to a finned tube condenser of a dehumidification device through a refrigerant pipeline; and the fourth solenoid valve is connected to a preheating coil heat exchanger through a pipeline; The backwash filter is connected to a wastewater pump through a pipeline, the wastewater pump is connected to a primary plate heat exchanger through a pipeline, and the primary plate heat exchanger is connected to a plate evaporator through a pipeline; The tap water inlet pipe is connected to the primary plate exchanger, the plate condenser is respectively connected to a flow regulating valve and a preheating water tank through pipelines, the flow regulating valve and the preheating water tank are respectively connected to a hot water pipe, a temperature control mixing valve is provided on the hot water pipe, and the hot water pipe is connected to a shower; The dehumidification device further includes a second expansion valve, a fan, a fin tube evaporator and a refrigerant pipeline, the fin tube evaporator is respectively connected to the second expansion valve and the second drying filter, the second drying filter is respectively connected to the third check valve and the fourth check valve through pipelines, the third check valve is connected to the fin condenser, the fin condenser is connected to the third solenoid valve, and the fourth check valve is connected to the preheating coil heat exchanger; The filter unit includes a primary filter screen, an upper cover plate, an outer shell, a cylindrical filter screen and a brush. The outer shell is fixed to the top of the water collecting tank. The primary filter screen is fixed in the outer shell. The bottom of the primary filter screen is fixed to the upper cover plate. The bottom of the upper cover plate is fixed to the cylindrical filter screen. The cylindrical filter screen is movably connected in the water collecting tank. A water collecting tank is provided in the cylindrical filter screen. The brush is fixed to the inner wall of the outer shell of the water collecting tank. A drum is sleeved in the cylindrical filter screen, and the water collecting tank is sleeved in the drum. A first supporting tube and a second supporting tube are fixed at both ends of the water collecting tank respectively. The first supporting tube and the second supporting tube are respectively fixed to the inner wall of the shell. The water collecting tank includes an upper tank and a lower tank. The upper tank is fixed to the lower tank. A first outlet hole is opened at one end of the upper tank close to the first supporting tube, and a second outlet hole is opened at one end of the lower tank. The wastewater inlet pipe is inserted in the second outlet hole, and a strip seam is opened on one side of the lower tank.

2. The multi-stage multi-source heat pump heat recovery instant hot water and shower room moisture-proof device according to claim 1, characterized in that: A plurality of water retaining strips are fixed on the inner wall of the cylindrical filter screen.

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