An air heat pump water heater with high-efficiency heat recovery function

Abstract

The present invention discloses an air source heat pump water heater with a high-efficiency heat recovery function, which belongs to the technical field of air source heat pump water heaters, and includes a straight-discharge pipe, a connecting pipe, a filtering mechanism, a valve mechanism, an air source heat pump water heater body, and a preheating mechanism. The air source heat pump water heater with a high-efficiency heat recovery function in the present invention is provided with a straight-discharge pipe, a connecting pipe, a valve mechanism, and a preheating mechanism. The preheating mechanism can utilize the heat of the wastewater to preheat the water inlet pipe of the air source heat pump water heater body, can effectively recover heat energy, and improve the overall energy efficiency of the system; by providing a filtering mechanism, impurities in the wastewater can be filtered out to prevent these impurities from entering the straight-discharge pipe and the preheating mechanism, thereby ensuring the normal operation of the device.

Description

Technical Field

[0001] The invention belongs to the technical field of air thermal energy heat pump water heaters, and in particular relates to an air thermal energy heat pump water heater with a high-efficiency heat recovery function. Background Art

[0002] Today, as energy is becoming increasingly scarce and environmental awareness is gradually increasing, air heat pump water heaters, as a highly efficient and environmentally friendly water heating equipment, have received widespread attention and application. Air heat pump water heaters absorb low-temperature heat from the air, gasify it through fluorine medium, then compress it through a compressor to increase the pressure and temperature, and then convert it through a heat exchanger to heat water. The compressed high-temperature heat energy is used to heat the water temperature.

[0003] At present, most of the existing air heat pump water heaters on the market focus on improving the heat exchange efficiency of the heat pump, but there are still deficiencies in heat recovery and wastewater utilization. On the one hand, the heat energy in the wastewater is often directly discharged and not effectively recycled; on the other hand, the debris in the wastewater will clog the equipment, affecting the heat exchange efficiency and service life. Summary of the invention

[0004] The purpose of the present invention is to provide an air heat energy heat pump water heater with high-efficiency heat recovery function, which is used to solve the technical problems in the prior art that the heat energy in the wastewater is often directly discharged without being effectively recycled, and the debris in the wastewater will clog the equipment, affecting the heat exchange efficiency and service life.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An air source heat pump water heater with a high-efficiency heat recovery function comprises: a straight-discharge pipe installed under a floor; a connecting pipe fixedly connected to and communicated with the straight-discharge pipe; a filtering mechanism installed in the straight-discharge pipe; a valve mechanism; an air source heat pump water heater body installed above the floor; a preheating mechanism installed under the floor and connected to the connecting pipe, wherein a water inlet pipe of the air source heat pump water heater body passes through the preheating mechanism; wherein when the valve mechanism is closed, waste water in the straight-discharge pipe will enter the preheating mechanism through the connecting pipe, so that the waste water heats the water inlet pipe.

[0007] Preferably, the preheating mechanism comprises: a preheating box, the water inlet pipe passes through the preheating box, the part of the water inlet pipe located in the preheating box is arranged in a "snake shape", the end of the connecting pipe away from the straight-discharge pipe is fixedly connected to and communicated with the preheating box; a drain pipe, one end of which is connected to the preheating box, and the other end of which is connected to the straight-discharge pipe; an electric valve installed on the drain pipe.

[0008] Preferably, the valve mechanism includes: a temperature sensor installed on the inner wall of the straight-discharge pipe; a motor installed on the side of the preheating box, whose power output shaft extends into the straight-discharge pipe and is rotatably connected to the straight-discharge pipe; a ball valve rotatably installed in the straight-discharge pipe and fixedly connected to the power output shaft of the motor; and a controller installed on the side of the preheating box.

[0009] Preferably, the filtering mechanism includes: a filter cartridge installed on the inner top of the straight pipe, the bottom surface of the filter cartridge protruding inward; a rotating shaft passing through the bottom surface of the filter cartridge and rotatably connected to the filter cartridge; an insert rod installed at the upper end of the rotating shaft; a first bevel gear installed at the lower end of the insert rod; and a first cleaning piece for cleaning the inner wall of the filter cartridge.

[0010] Preferably, the first cleaning member includes: an insert sleeve, which is plug-fitted with the insert rod; a connecting rod installed on the side of the insert sleeve; a cleaning brush installed on the end of the connecting rod away from the insert sleeve and in contact with the inner wall of the filter sleeve; and a water leakage cover plate, which is fixedly connected to the upper end of the insert sleeve and plug-fitted with the filter sleeve.

[0011] Preferably, the filtering mechanism also includes: two first reciprocating screws, both rotatably mounted on the filter cartridge; two second bevel gears, respectively fixedly connected to the lower ends of the two first reciprocating screws; a second cleaning member, which includes: a cleaning ring, sleeved on the filter cartridge and in contact with the outer wall of the filter cartridge; two first movable seats, both penetrated and mounted on the cleaning ring, and respectively sleeved on the two first reciprocating screws.

[0012] Preferably, the preheating mechanism also includes a driving assembly, which includes: a cross bar, which is rotatably connected to the straight-discharge pipes, the water inlet pipe and the preheating box, one end of which is located in the straight-discharge pipes, and the other end of which is located in the water inlet pipe; a first group of blades, which is installed on the part of the cross bar located in the water inlet pipe; a third bevel gear, which is fixedly mounted on the cross bar and meshed with the first bevel gear; two fourth bevel gears, which are both fixedly mounted on the cross bar and meshed with the two second bevel gears respectively.

[0013] Preferably, the preheating mechanism also includes a scraper assembly, which includes: a second reciprocating screw, located in the preheating box, with its lower end passing through the bottom surface of the preheating box and extending into the drain pipe, the second reciprocating screw being rotatably connected to the preheating box and the drain pipe; a second group of blades, installed on the portion of the second reciprocating screw located in the drain pipe; a second movable seat, located in the preheating box and sleeved on the second reciprocating screw; a connecting plate, fixedly sleeved on the second movable seat; and a plurality of ring knives, all fixedly connected to the connecting plate, and all slidably sleeved on the water inlet pipe.

[0014] Preferably, the air thermal energy heat pump water heater with high-efficiency heat recovery function also includes a wastewater detection and control system, which includes: a data acquisition module, used to collect comprehensive data of the wastewater in the preheating box, the comprehensive data including the pH value of the wastewater, the dissolved oxygen content in the wastewater, the chloride ion concentration in the wastewater, the concentration of specific chemical substances in the wastewater, the temperature of the wastewater and the liquid level of the wastewater; a data analysis module, used to generate a wastewater quality index based on the comprehensive data, and then compare the wastewater quality index with a preset wastewater quality index threshold, and generate control instructions based on the comparison results, the temperature of the wastewater and the liquid level; a control module, used to receive the control instructions sent by the data analysis module, and generate a control signal for controlling the electric valve.

[0015] Preferably, the working steps of the wastewater detection and control system are as follows: Step 1, accept the wastewater quality index threshold, wastewater temperature threshold and liquid level height threshold set by the user; Step 2, the data acquisition module collects the comprehensive data in the preheating box, and sends the comprehensive data to the data analysis module; Step 3, the data analysis module generates a wastewater quality index according to the received comprehensive data, and then compares the wastewater quality index with the preset wastewater quality index, and generates a control instruction according to the comparison result, the temperature and liquid level of the wastewater; Step 4, the data analysis module sends the control instruction to the control module; Step 5, the control module generates a corresponding control signal according to the control instruction, and then controls the start of the electric valve according to the control signal.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0017] 1. The air source heat pump water heater with high-efficiency heat recovery function in the present invention is provided with a straight discharge pipe, a connecting pipe, a valve mechanism and a preheating mechanism. The preheating mechanism can use the heat of the wastewater to preheat the water inlet pipe of the air source heat pump water heater body, which can effectively recover heat energy and improve the overall energy efficiency of the system; by providing a filtering mechanism, the sundries in the wastewater can be filtered out to prevent these sundries from entering the straight discharge pipe and the preheating mechanism, thereby ensuring the normal operation of the device.

[0018] 2. The filtering mechanism of the present invention is provided with a rotating shaft, an insertion rod, a first bevel gear, a first cleaning piece, a first reciprocating screw, a second bevel gear, a second cleaning piece and a driving assembly. When water in the water inlet pipe flows, the driving assembly drives the first bevel gear and the second bevel gear to rotate, thereby driving the first reciprocating screw and the rotating shaft to rotate, so that the cleaning brush and the cleaning ring automatically clean the inner wall and outer surface of the filter cartridge, thereby improving the filtering efficiency of the filter cartridge; and the driving method of the cleaning ring and the cleaning brush does not require the provision of an independent power source, thereby reducing the cost of use.

[0019] 3. The scraper assembly in the present invention is provided with a second reciprocating screw, a second set of blades, a second movable seat, a connecting plate and a ring knife. When wastewater flows in the drain pipe, the wastewater will drive the second set of blades to rotate, and then drive the second reciprocating screw to rotate, so that the second movable seat, the connecting plate and the scraper can move back and forth up and down, so that the scraper can remove the debris attached to the water inlet pipe, so that the wastewater can transfer heat to the water inlet pipe more effectively, thereby improving the heat exchange efficiency; and because the scraper assembly is driven by the flow of wastewater, no additional power source is required, which simplifies the structure of the device and reduces the manufacturing cost and use cost.

[0020] 4. The wastewater detection and control system in the present invention is equipped with a data acquisition module, a data analysis module and a control module. By comprehensively considering multiple key parameters such as the pH value, dissolved oxygen content, chloride ion concentration and concentration of specific chemical substances of the wastewater in the preheating box, it can comprehensively and accurately evaluate the corrosiveness of the wastewater, provide a basis for judging the potential corrosion risk of the wastewater to the water inlet pipe, and then judge whether the wastewater is suitable for preheating according to the wastewater quality index. When it is judged that the wastewater is highly corrosive to the water inlet pipe, the electric valve is opened to discharge the wastewater in the preheating box, thereby reducing the corrosion of the wastewater to the water inlet pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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 or the description of the prior art 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 work.

[0022] Figure 1 A three-dimensional diagram of an air heat pump water heater with a high-efficiency heat recovery function in the present invention;

[0023] Figure 2 Schematic diagram of the assembly structure of the straight pipe, connecting pipe and preheating box in the present invention Figure 1 ;

[0024] Figure 3 Schematic diagram of the assembly structure of the straight pipe, connecting pipe and preheating box in the present invention Figure 2 ;

[0025] Figure 4 It is a schematic diagram of the internal structure of the straight pipe in the present invention;

[0026] Figure 5 An exploded view of the filtering mechanism of the present invention;

[0027] Figure 6 It is a schematic diagram of the assembly structure of the filter mechanism and the drive assembly in the present invention;

[0028] Figure 7 It is a schematic diagram of the internal structure of the filter cartridge in the present invention;

[0029] Figure 8 It is a schematic diagram of the internal structure of the preheating box and the water inlet pipe in the present invention;

[0030] Fig. 9 A three-dimensional diagram of a scraper tube assembly in the present invention;

[0031] Fig.10 It is a module diagram of the wastewater detection and control system in the present invention;

[0032] Fig.11 It is a flow chart of the working steps of the wastewater detection and control system in the present invention;

[0033] Figure numerals: 100, straight pipe; 101, connecting pipe; 110, filtering mechanism; 111, filtering cartridge; 112, rotating shaft; 113, inserting rod; 114, first bevel gear; 115, first cleaning member; 1151, inserting cartridge; 1152, connecting rod; 1153, cleaning brush; 1154, leaking cover plate; 116, first reciprocating screw; 117, second bevel gear; 118, second cleaning member; 1181, cleaning ring; 1182, first moving seat; 120, valve mechanism; 121, temperature sensor; 122, electric machine; 123, ball valve; 124, controller; 200, air source heat pump water heater body; 210, water inlet pipe; 300, preheating mechanism; 301, preheating box; 302, drain pipe; 303, electric valve; 310, drive assembly; 311, cross bar; 312, first set of blades; 313, third bevel gear; 314, fourth bevel gear; 320, scraper assembly; 321, second reciprocating screw; 322, second set of blades; 323, second moving seat; 324, connecting plate; 325, ring knife; 400, floor. DETAILED DESCRIPTION

[0034] 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.

[0035] Example 1

[0036] like Figure 1-Figure 3 As shown, an air source heat pump water heater with a high-efficiency heat recovery function includes a straight pipe 100, a connecting pipe 101, a filtering mechanism 110, a valve mechanism 120, an air source heat pump water heater body 200 and a preheating mechanism 300.

[0037] The straight pipe 100 is installed below the floor 400; the connecting pipe 101 is fixedly connected and communicated with the straight pipe 100, and the filtering mechanism 110 is installed in the straight pipe 100. The air source heat pump water heater body 200 is installed above the floor 400; the preheating mechanism 300 is installed below the floor 400, and the preheating mechanism 300 is connected to the connecting pipe 101. The connecting pipe 101 is inclined, and the position of the connecting pipe 101 connecting to the straight pipe 100 is lower, and the position of the connecting pipe 101 connecting to the preheating box 301 is higher. The water inlet pipe 210 of the air source heat pump water heater body 200 passes through the preheating mechanism 300.

[0038] Specifically, when the valve mechanism 120 is opened, the water in the straight-discharge pipe 100 will flow downward along the straight-discharge pipe 100, and when the valve mechanism 120 is closed, the wastewater in the straight-discharge pipe 100 will enter the preheating mechanism 300 through the connecting pipe 101, so that the wastewater heats the water inlet pipe 210, and then preheats the water in the water inlet pipe 210. By providing the filtering mechanism 110, it is possible to prevent debris in the wastewater from entering the straight-discharge pipe 100 and the preheating mechanism 300.

[0039] like Figure 2 and Figure 3 As shown, the preheating mechanism 300 includes a preheating box 301, a drain pipe 302 and an electric valve 303. The water inlet pipe 210 runs through the preheating box 301, and the part of the water inlet pipe 210 located in the preheating box 301 is arranged in a "snake-like" manner. The end of the connecting pipe 101 away from the straight-discharge pipe 100 is fixedly connected to and communicated with the preheating box 301; one end of the drain pipe 302 is connected to the preheating box 301, and the other end of the drain pipe 302 is connected to the straight-discharge pipe 100; the drain pipe is arranged in a bent manner, and the electric valve 303 is installed on the drain pipe 302.

[0040] Specifically, when the valve mechanism 120 is closed, the waste water in the straight-discharge pipe 100 will enter the preheating box 301 through the connecting pipe 101; when the water temperature in the preheating box 301 is low or the liquid level is high, the waste water in the preheating box 301 can be discharged into the straight-discharge pipe 100 through the drain pipe 302 by starting the electric valve 303;

[0041] By arranging the part of the water inlet pipe 210 located in the preheating box 301 in a "snake shape", the contact area between the water inlet pipe 210 and the wastewater in the preheating box 301 can be increased, thereby facilitating improving the heat exchange efficiency.

[0042] Such as 3 and Figure 4As shown, the valve mechanism 120 includes a temperature sensor 121, a motor 122, a ball valve 123 and a controller 124. The temperature sensor 121 is mounted on the inner wall of the straight-discharge pipe 100; the motor 122 is mounted on the side of the preheating box 301, and the power output shaft of the motor 122 extends into the straight-discharge pipe 100 and is rotatably connected to the straight-discharge pipe 100; the ball valve 123 is rotatably mounted in the straight-discharge pipe 100, and the ball valve 123 is fixedly connected to the power output shaft of the motor 122; the controller 124 is mounted on the side of the preheating box 301, and the controller 124 is electrically connected to the temperature sensor 121 and the motor 122.

[0043] Specifically, by presetting the temperature on the controller 124, when the temperature sensor 121 detects that the water temperature in the straight-discharge pipe 100 is lower than the preset temperature, the controller 124 will start the motor 122, so that the motor 122 drives the ball valve 123 to rotate, so that the through hole on the ball valve 123 is connected with the discharge channel of the straight-discharge pipe 100, so that the water above the ball valve 123 is discharged downward;

[0044] When the temperature sensor 121 detects that the water temperature in the straight-discharge pipe 100 is higher than or equal to the preset temperature, the controller 124 will start the motor 122, so that the motor 122 drives the ball valve 123 to rotate, so that the through hole on the ball valve 123 is offset from the discharge channel of the straight-discharge pipe 100, and the water above the ball valve 123 enters the preheating box 301 through the connecting pipe 101.

[0045] like Figure 5-Figure 7 As shown, the filter mechanism 110 includes a filter cartridge 111 , a rotating shaft 112 , an insertion rod 113 , a first bevel gear 114 and a first cleaning member 115 .

[0046] The filter cartridge 111 is installed at the inner top of the straight pipe 100, and the bottom surface of the filter cartridge 111 is convex inward. The rotating shaft 112 passes through the bottom surface of the filter cartridge 111 and is rotatably connected to the filter cartridge 111; the plug rod 113 is installed at the upper end of the rotating shaft 112; and the first bevel gear 114 is installed at the lower end of the plug rod 113.

[0047] The first cleaning member 115 is used to clean the inner wall of the filter cartridge 111. The first cleaning member 115 includes an insert cartridge 1151, a connecting rod 1152, a cleaning brush 1153 and a water leakage cover plate 1154. The insert cartridge 1151 is plugged into and matched with the insert rod 113; the connecting rod 1152 is installed on the side of the insert cartridge 1151; the cleaning brush 1153 is installed on the end of the connecting rod 1152 away from the insert cartridge 1151, and the cleaning brush 1153 contacts the inner wall of the filter cartridge 111; the water leakage cover plate 1154 is fixedly connected to the upper end of the insert cartridge 1151, and the water leakage cover plate 1154 is plugged into and matched with the filter cartridge 111.

[0048] Specifically, by designing the bottom surface of the filter cartridge 111 to be convex inward, the surface area of ​​the filter cartridge 111 can be increased, thereby increasing the filtering area of ​​the filter cartridge 111.

[0049] By setting up the filter cartridge 111, the water entering the straight-discharge pipe 100 can be filtered, and by rotating the first bevel gear 114, the rotating shaft 112 and the insert rod 113 are driven to rotate, thereby driving the insert cartridge 1151 and the connecting rod 1152 to rotate, thereby driving the cleaning brush 1153 to rotate, and then the cleaning brush 1153 cleans the inner wall of the filter cartridge 111, thereby preventing debris from clogging the filter cartridge 111 and affecting the filtering efficiency.

[0050] When it is necessary to remove the debris in the filter cartridge 111 , the leaking cover plate 1154 is moved upward to drive the insert cartridge 1151 , the connecting rod 1152 and the cleaning brush 1153 to move upward, and then a small clamp or a small rake is used to remove the debris in the filter cartridge 111 .

[0051] like Figure 6 and Figure 7 As shown, the filter mechanism 110 further includes two first reciprocating screws 116, two second bevel gears 117 and a second cleaning member 118. The two first reciprocating screws 116 are both rotatably mounted on the filter cartridge 111; the two second bevel gears 117 are fixedly connected to the lower ends of the two first reciprocating screws 116 respectively.

[0052] The second cleaning member 118 includes a cleaning ring 1181 and two first movable seats 1182. The cleaning ring 1181 is sleeved on the filter cartridge 111 and contacts the outer wall of the filter cartridge 111; the two first movable seats 1182 are both installed through the cleaning ring 1181 and sleeved on the two first reciprocating screws 116 respectively.

[0053] Specifically, when the two second bevel gears 117 rotate, the two first reciprocating screws 116 are driven to rotate, and the two first moving seats 1182 are moved back and forth up and down along the first reciprocating screws 116, thereby driving the cleaning ring 1181 to move back and forth up and down, and the cleaning ring 1181 cleans the outer surface of the filter cartridge 111, thereby improving the filtering efficiency of the filter cartridge 111.

[0054] like Figure 6-Figure 8 As shown, the preheating mechanism 300 further includes a driving assembly 310 , and the driving assembly 310 includes a crossbar 311 , a first set of blades 312 , a third bevel gear 313 , and two fourth bevel gears 314 .

[0055] The cross bar 311 is rotatably connected to the straight-row pipe 100, the water inlet pipe 210 and the preheating box 301, one end of the cross bar 311 is located in the straight-row pipe 100, and the other end of the cross bar 311 is located in the water inlet pipe 210; the first group of blades 312 is installed on the part of the cross bar 311 located in the water inlet pipe 210; the third bevel gear 313 is fixedly mounted on the cross bar 311, and the third bevel gear 313 is meshed with the first bevel gear 114; the two fourth bevel gears 314 are both fixedly mounted on the cross bar 311, and the two fourth bevel gears 314 are respectively meshed with the two second bevel gears 117.

[0056] Working principle: Before use, the temperature is preset on the controller 124. During specific use, the wastewater above the bottom plate will enter the straight pipe 100, and the filter cartridge 111 in the straight pipe 100 will filter the wastewater, and the filtered wastewater will fall onto the temperature sensor 121.

[0057] When the temperature sensor 121 detects that the water temperature in the straight-discharge pipe 100 is higher than or equal to the preset temperature, the controller 124 will start the motor 122, so that the motor 122 drives the ball valve 123 to rotate, so that the through hole on the ball valve 123 is offset from the discharge channel of the straight-discharge pipe 100, so that the wastewater above the ball valve 123 can only enter the preheating box 301 through the connecting pipe 101.

[0058] The waste water entering the preheating box 301 will contact the water inlet pipe 210 of the air source heat pump water heater body 200 , and the waste water will heat the water inlet pipe 210 , thereby preheating the water in the water inlet pipe 210 .

[0059] When the temperature of the wastewater in the preheating box 301 is low, or the liquid level of the wastewater is high (level with the connecting pipe 101), the electric valve 303 is started to discharge the wastewater in the preheating box 301 through the drain pipe 302, and the discharged wastewater will enter the straight discharge pipe 100.

[0060] Among them, when the air source heat pump water heater body 200 is in operation, the water in the water inlet pipe 210 will enter the air source heat pump water heater body 200. When the water flows in the water inlet pipe 210, it will drive the first set of blades 312 to rotate, and then drive the cross bar 311 to rotate, and then drive the third bevel gear 313 to rotate, and then mesh and drive the first bevel gear 114 to rotate, and then drive the rotating shaft 112 and the insertion rod 113 to rotate, and then drive the insertion tube 1151, the connecting rod 1152 and the cleaning brush 1153 to rotate, and then make the cleaning brush 1153 clean the inner wall of the filter tube 111, so as to prevent debris from clogging the filter tube 111 and affecting the filtration efficiency.

[0061] And when the cross bar 311 rotates, it will also drive the two fourth bevel gears 314 to rotate, and then engage and drive the two second bevel gears 117 to rotate, and then drive the two first reciprocating screws 116 to rotate, and then make the two first moving seats 1182 move back and forth up and down along the first reciprocating screws 116, and then drive the cleaning ring 1181 to move back and forth up and down, and then make the cleaning ring 1181 clean the outer surface of the filter cartridge 111, so as to improve the filtering efficiency of the filter cartridge 111.

[0062] When it is necessary to remove the debris in the filter cartridge 111 , the leaking cover plate 1154 is moved upward to drive the insert cartridge 1151 , the connecting rod 1152 and the cleaning brush 1153 to move upward, and then a small clamp or a small rake is used to remove the debris in the filter cartridge 111 .

[0063] Example 2

[0064] like Figure 8 and Fig. 9 As shown, while other parts are the same as those in Example 1, the difference between this embodiment and Example 1 is that the preheating mechanism 300 also includes a scraper assembly 320, and the scraper assembly 320 includes a second reciprocating screw 321, a second group of blades 322, a second movable seat 323, a connecting plate 324 and a plurality of ring knives 325.

[0065] The second reciprocating screw 321 is located in the preheating box 301, and the lower end of the second reciprocating screw 321 passes through the bottom surface of the preheating box 301 and extends into the drain pipe 302. The second reciprocating screw 321 is rotatably connected to the preheating box 301 and the drain pipe 302; the second group of blades 322 is installed on the part of the second reciprocating screw 321 located in the drain pipe 302; the second movable seat 323 is located in the preheating box 301, and the second movable seat 323 is sleeved on the second reciprocating screw 321; the connecting plate 324 is fixedly sleeved on the second movable seat 323; multiple ring knives 325 are fixedly connected to the connecting plate 324, and multiple ring knives 325 are slidably sleeved on the water inlet pipe 210.

[0066] Specifically, when the multiple ring knives 325 move, the ring knives 325 will scrape off the debris attached to the water inlet pipe 210. Removing the debris on the outer surface of the water inlet pipe 210 can reduce thermal resistance, allowing the wastewater to transfer heat to the water inlet pipe 210 more effectively, thereby improving heat exchange efficiency.

[0067] Working principle: During specific use, when the electric valve 303 is opened, the wastewater in the preheating box 301 will flow to the direct current pipe through the drain pipe 302, and the flowing wastewater will drive the second set of blades 322 to rotate, and then drive the second reciprocating screw 321 to rotate, so that the second movable seat 323 moves back and forth up and down along the second reciprocating screw 321, and then drive the connecting plate 324 and multiple ring knives 325 to move back and forth up and down. When the multiple ring knives 325 move, the ring knives 325 will scrape off the debris attached to the water inlet pipe 210. Removing the debris on the outer surface of the water inlet pipe 210 can reduce thermal resistance, so that the wastewater can more effectively transfer heat to the water inlet pipe 210, thereby improving the heat exchange efficiency.

[0068] Example 3

[0069] like Figure 10-11 As shown, when other parts are the same as those in Example 2, the difference between this embodiment and Example 2 is that: the air thermal energy heat pump water heater with high-efficiency heat recovery function also includes a wastewater detection control system, and the wastewater detection control system includes:

[0070] The data acquisition module is used to collect comprehensive data of the wastewater in the preheating box 301, the comprehensive data including the pH value of the wastewater, the dissolved oxygen content in the wastewater, the chloride ion concentration in the wastewater, the concentration of specific chemical substances in the wastewater, the temperature of the wastewater and the liquid level height of the wastewater;

[0071] The data analysis module is used to generate a wastewater quality index based on the comprehensive data, and then compare the wastewater quality index with a preset wastewater quality index threshold, and generate a control instruction based on the comparison result, the temperature and liquid level of the wastewater;

[0072] The control module is used to receive the control instruction sent by the data analysis module and generate a control signal for controlling the electric valve 303 .

[0073] The working steps of the wastewater detection and control system are as follows:

[0074] Step 1: accept the wastewater quality index threshold, wastewater temperature threshold and liquid level height threshold set by the user, and mark the wastewater quality index threshold as Q1;

[0075] Step 2: The data acquisition module collects comprehensive data in the preheating box and sends the comprehensive data to the data analysis module, wherein the comprehensive data includes the pH value of the wastewater, the dissolved oxygen content in the wastewater, the chloride ion concentration in the wastewater, the concentration of specific chemical substances in the wastewater (such as sulfate, nitrate, etc.), the temperature of the wastewater and the liquid level of the wastewater;

[0076] Step 3: The data analysis module generates a wastewater quality index based on the received comprehensive data, compares the wastewater quality index with a preset wastewater quality index, and generates a control instruction based on the comparison result, the temperature and liquid level of the wastewater;

[0077] Step 4: The data analysis module sends the control instruction to the control module;

[0078] Step 5: The control module generates a corresponding control signal according to the control instruction, and then starts the electric valve 303 according to the control signal.

[0079] In step three, the wastewater quality index is generated as follows:

[0080]

[0081] Where Q is the wastewater quality index, which is used to evaluate the corrosiveness of wastewater; pH is the pH value of wastewater; DO is the dissolved oxygen content in wastewater; Cl - is the concentration of chloride ions in the wastewater; Chem is the concentration of specific chemical substances in the wastewater (such as sulfate, nitrate, etc.); μ DO and σ DO are the mean and standard deviation of dissolved oxygen content, respectively, used for normalization; μ Chem and σ Chem are the mean and standard deviation of the concentration of specific chemical substances, respectively, for normalization; T is the monitoring time period; max(pH), max(DO), max(Cl - ) and max(Chem) are the maximum values ​​of pH value, dissolved oxygen content, chloride ion concentration and specific chemical concentration respectively; dt represents the time differential, which is a basic element in the integral operation. T In (···)dt, dt represents the small division of the time variable t so that the function in the brackets can be accumulated over the entire time period T.

[0082] The value range of Q is [0, +∞]; when Q is close to 0, it means that the wastewater has a smaller corrosion effect on the water inlet pipe 210, and when Q is larger, it means that the wastewater has a larger corrosion effect on the water inlet pipe 210.

[0083] The way to generate control instructions in step three is as follows:

[0084] When Q<Q1, and the actual temperature of the wastewater in the preheating tank ≥ the temperature threshold of the wastewater, and the actual liquid level in the preheating tank <the liquid level threshold, no control instruction is generated;

[0085] When Q≥Q1, the first control instruction is generated;

[0086] When the actual temperature of the wastewater in the preheating box 301 is less than the temperature threshold of the wastewater, a second control instruction is generated;

[0087] When the actual liquid level in the preheating tank 301 is greater than or equal to the liquid level threshold, a third control instruction is generated.

[0088] In step 5, the control module generates the corresponding control signal in the following manner:

[0089] If the control module receives the first control instruction, it generates a first control signal;

[0090] If the control module receives the second control instruction, it generates a second control signal;

[0091] If the control module receives the third control instruction, it generates a third control signal; wherein, the first control signal and the second control signal are for controlling the start of the electric valve 303 for twenty seconds; the third control signal is for controlling the start of the electric valve 303 for five seconds; when the electric valve 303 is opened for twenty seconds, a whole box of waste water in the preheating box 301 can be emptied (when not filled with water).

[0092] In the above, the pH value of the wastewater can be obtained by measuring with a pH meter, the dissolved oxygen content in the wastewater can be obtained by measuring with a dissolved oxygen meter, the chloride ion concentration in the wastewater can be obtained by measuring with a chloride ion meter, and the concentration of specific chemical substances in the wastewater (such as sulfate, nitrate, etc.) can be obtained by measuring with a spectrophotometer or an ion chromatograph.

[0093] The wastewater detection and control system is provided with a data acquisition module, a data analysis module and a control module, and by comprehensively considering multiple key parameters such as the pH value, dissolved oxygen content, chloride ion concentration and concentration of specific chemical substances (such as sulfate, nitrate, etc.) of the wastewater in the preheating box 301, it can comprehensively and accurately evaluate the corrosiveness of the wastewater, provide a basis for judging the potential corrosion risk of the wastewater to the water inlet pipe 210, and then judge whether the wastewater is suitable for preheating according to the wastewater quality index. When it is judged that the wastewater is highly corrosive to the water inlet pipe 210, the electric valve 303 is opened to discharge the wastewater in the preheating box 301, thereby reducing the corrosion of the wastewater to the water inlet pipe 210.

[0094] By detecting the liquid level and water temperature of the wastewater in the preheating box 301, when the temperature of the wastewater is too low to heat the water inlet pipe 210, the wastewater in the preheating box 301 is drained; when the liquid level is too high, part of the wastewater in the preheating box 301 is drained to prevent other wastewater from entering the preheating box 301.

[0095] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

[0096] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An air heat pump water heater with high-efficiency heat recovery function, characterized in that: include: A straight pipe (100) is installed under the floor (400); A connecting pipe (101) is fixedly connected to and communicates with the straight pipe (100); A filtering mechanism (110) installed in the straight pipe (100); Valve mechanism (120); The air source heat pump water heater body (200) is installed above the floor (400); A preheating mechanism (300) is installed under the floor (400) and is connected to the connecting pipe (101); the water inlet pipe (210) of the air source heat pump water heater body (200) passes through the preheating mechanism (300); When the valve mechanism (120) is closed, the wastewater in the straight-discharge pipe (100) enters the preheating mechanism (300) through the connecting pipe (101), so that the wastewater heats the water inlet pipe (210); The preheating mechanism (300) comprises: A preheating box (301), wherein the water inlet pipe (210) passes through the preheating box (301), the portion of the water inlet pipe (210) located inside the preheating box (301) is arranged in a "snake-like" manner, and one end of the connecting pipe (101) away from the straight-discharge pipe (100) is fixedly connected to and communicates with the preheating box (301); A drainage pipe (302), one end of which is connected to the preheating box (301), and the other end of which is connected to the straight drainage pipe (100); An electric valve (303) installed on the drain pipe (302); The filtering mechanism (110) comprises: A filter cartridge (111) is installed on the inner top of the straight pipe (100), and the bottom surface of the filter cartridge (111) is convex inwards; A rotating shaft (112) passes through the bottom surface of the filter cartridge (111) and is rotatably connected to the filter cartridge (111); An insertion rod (113) mounted on the upper end of the rotating shaft (112); A first bevel gear (114) mounted on the lower end of the insertion rod (113); A first cleaning member (115) for cleaning the inner wall of the filter cartridge (111); The preheating mechanism (300) further comprises a scraper tube assembly (320), wherein the scraper tube assembly (320) comprises: A second reciprocating screw (321) is located in the preheating box (301), with its lower end passing through the bottom surface of the preheating box (301) and extending into the drain pipe (302), and the second reciprocating screw (321) is rotatably connected to the preheating box (301) and the drain pipe (302); A second set of blades (322) mounted on a portion of the second reciprocating screw (321) located inside the drain pipe (302); A second movable seat (323) is located in the preheating box (301) and is sleeved on the second reciprocating screw (321); A connecting plate (324) fixedly sleeved on the second movable seat (323); A plurality of ring cutters (325) are all fixedly connected to the connection plate (324) and are slidably sleeved on the water inlet pipe (210).

2. The air heat energy heat pump water heater with high efficiency heat recovery function according to claim 1, characterized in that: The valve mechanism (120) comprises: A temperature sensor (121) is installed on the inner wall of the straight pipe (100); A motor (122) is installed on a side of the preheating box (301), and its power output shaft extends into the straight pipe (100) and is rotatably connected to the straight pipe (100); A ball valve (123) is rotatably mounted in the straight pipe (100) and is fixedly connected to the power output shaft of the motor (122); A controller (124) is installed on a side of the preheating box (301).

3. The air heat energy heat pump water heater with high efficiency heat recovery function according to claim 2, characterized in that: The first cleaning member (115) comprises: An inserting tube (1151) is plugged into and matched with the inserting rod (113); A connecting rod (1152) is mounted on a side of the inserting tube (1151); A cleaning brush (1153) is mounted on an end of the connecting rod (1152) away from the insert cylinder (1151) and is in contact with the inner wall of the filter cylinder (111); The water leakage cover plate (1154) is fixedly connected to the upper end of the insert cylinder (1151) and is plugged into and matched with the filter cylinder (111).

4. The air heat pump water heater with high-efficiency heat recovery function according to claim 3, characterized in that: The filtering mechanism (110) further comprises: Two first reciprocating screws (116) are both rotatably mounted on the filter cartridge (111); Two second bevel gears (117) are fixedly connected to the lower ends of the two first reciprocating screws (116) respectively; The second cleaning member (118) comprises: A cleaning ring (1181) is sleeved on the filter cartridge (111) and is in contact with an outer wall of the filter cartridge (111); The two first movable seats (1182) are both installed through the cleaning ring (1181) and are respectively sleeved on the two first reciprocating screws (116).

5. The air heat pump water heater with high-efficiency heat recovery function according to claim 4, characterized in that: The preheating mechanism (300) further comprises a driving assembly (310), wherein the driving assembly (310) comprises: A cross bar (311) rotatably connected to the straight pipe (100), the water inlet pipe (210) and the preheating box (301), one end of which is located in the straight pipe (100) and the other end of which is located in the water inlet pipe (210); A first set of blades (312) mounted on a portion of the crossbar (311) located inside the water inlet pipe (210); A third bevel gear (313) is fixedly sleeved on the crossbar (311) and meshedly connected with the first bevel gear (114); The two fourth bevel gears (314) are both fixedly sleeved on the crossbar (311) and are respectively meshed and connected with the two second bevel gears (117).

6. The air heat pump water heater with high-efficiency heat recovery function according to claim 5, characterized in that: It also includes a wastewater detection and control system, which includes: A data acquisition module, used for collecting comprehensive data of the wastewater in the preheating box (301), the comprehensive data including pH value of the wastewater, dissolved oxygen content in the wastewater, chloride ion concentration in the wastewater, temperature of the wastewater and liquid level height of the wastewater; The data analysis module is used to generate a wastewater quality index based on the comprehensive data, compare the wastewater quality index with a preset wastewater quality index threshold, and generate a control instruction based on the comparison result, the temperature and liquid level of the wastewater; The control module is used to receive the control instruction sent by the data analysis module and generate a control signal for controlling the electric valve (303).

7. The air heat pump water heater with high-efficiency heat recovery function according to claim 6, characterized in that: The working steps of the wastewater detection and control system are as follows: Step 1: accept the wastewater quality index threshold, wastewater temperature threshold and liquid level height threshold set by the user; Step 2: The data acquisition module collects the comprehensive data in the preheating box and sends the comprehensive data to the data analysis module; Step 3: The data analysis module generates a wastewater quality index based on the received comprehensive data, compares the wastewater quality index with a preset wastewater quality index, and generates a control instruction based on the comparison result, the temperature and liquid level of the wastewater; Step 4: The data analysis module sends the control instruction to the control module; Step 5: The control module generates a corresponding control signal according to the control instruction, and then controls the start-up of the electric valve (303) according to the control signal.

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