CN112361657A

CN112361657A - Novel water source phase change heat exchange device and heat pump system

Info

Publication number: CN112361657A
Application number: CN202011263689.9A
Authority: CN
Inventors: 于灏; 吴荣华; 岳远博
Original assignee: Qingdao University
Current assignee: Qingdao University
Priority date: 2020-11-12
Filing date: 2020-11-12
Publication date: 2021-02-12

Abstract

A novel water source phase change heat exchange device and a heat pump system. The invention belongs to the technical field of energy. The invention aims to provide a novel water source phase change heat exchange device and a heat pump system, which are used for realizing dead-corner-free deicing and quick ice discharge of a cold water phase change machine. The device comprises heat exchange tubes, a tube bank, a cold water flow channel, a scraper, a first transmission chain, a second transmission chain, a first main shaft, a second main shaft, a first upper transmission wheel, a second upper transmission wheel, a first lower transmission wheel, a second lower transmission wheel, a first transmission motor, a second transmission motor, a shell, an upper diversion box, a lower diversion box, an upper access door, a lower access door, an antifreezing water solution inlet, an antifreezing water solution outlet, a first ice discharge port, a second ice discharge port, a first ice discharge tube, a second ice discharge tube, a cold water inlet and an external observable stroke control device. The invention adopts the design of the wide flow channel and the upper and lower access ports of the vertical heat exchange tube, and scrapes the ice layer by using the scraper without dead angle, thereby not only ensuring that the resistance borne by the scraper in the deicing process is reduced, but also ensuring that the ice layer peeled off in time quickly forms ice-water mixture which is discharged from the cold water phase change machine, and realizing the continuous heat supply of the cold water phase change energy heat pump system; meanwhile, the double-door access hole facilitates the cold water phase change machine to be overhauled, and the overhauling space is saved. The invention is suitable for the heat pump heating system for extracting cold water phase change energy.

Description

Novel water source phase change heat exchange device and heat pump system

Technical Field

The invention relates to a novel water source phase change heat exchange device and a heat pump system, and belongs to the technical field of energy.

Background

The cold water phase change energy heat pump technology is adopted, and the huge phase change energy accumulated in the cold water is extracted and used for heating and cooling buildings, so that the method is one of effective ways for energy conservation and emission reduction, and has huge energy conservation, environmental protection and economic value. However, when the cold water phase-change energy heat pump system is actually applied, since the uninterrupted circulation of heating, icing, deicing and refreezing cannot be realized in the prior art, the heat pump system cannot continuously extract latent heat of solidification from water, that is, the heat pump system cannot continuously supply heat.

The patent number is "CN 201810748604.2", the name is "a cold water phase change machine and heat pump system", and the publication number is "CN 108626927A", which adopts the methods of intermittent hot ice melting and mechanical ice scraping to remove ice. However, due to the adoption of the methods of mechanical ice scraping and intermittent ice melting, the heat pump system stops heat exchange in the ice discharging process of the cold water phase change machine, the continuous heat exchange of the heat pump system cannot be ensured, and due to the horizontal arrangement of the heat exchange tube rows, the shearing resistance of the scraper on a welding seam is large in the ice removing process, so that the failure probability of the scraper and a chain is improved, and the ice discharging effect of the cold water phase change machine is influenced.

The patent number is 201410448663.X, the name is ' a cold water extracting and solidifying thermal device based on external continuous mechanical ice scraping ', the publication number is CN104197749.A ', and the method of mechanical ice scraping is adopted for deicing. However, the ice cannot be effectively and thoroughly removed by adopting a single mechanical ice scraping method, the ice layer is rapidly thickened along with the heat exchange, and in addition, the wall surface of the heat exchange tube is always covered with the ice layer, so that the heat exchange efficiency is low, and the efficiency of the system is not high.

The inventor filed a patent with application number "201610701458.9" entitled "a heat pump heating and cooling system for extracting freezing heat or making ice". Although theoretically true, in actual operation, because an ice layer is formed quickly and is thick, the ice layer is difficult to be timely and effectively stripped under the impact of sand grains, and continuous extraction of solidification heat and heating are difficult to realize.

The inventor applies for a patent with the application number of 201611267872.X, the name of which is' a latent heat of solidification acquisition device and

system ", this patent has the problem that the scraper can't accurately fall back to the cold water runner, and the scraper has great wearing and tearing with the heat transfer bank of tubes, influences

The service life of the scraper and the heat exchange tube bank is prolonged.

The inventor filed a patent with application number "201711495295.4" entitled "a heat pump heating and cooling system for extracting freezing heat or making ice". The scraper of this patent is the pendulum motion, leaves the motion dead zone, can't realize thoroughly deicing.

The invention adopts the design of the wide flow passage and the upper and lower access ports of the vertical heat exchange tube, and scrapes the ice layer by using the scraper without dead angle, thereby not only ensuring that the stress is reduced in the process of scraper deicing, but also ensuring that the ice layer peeled off in time quickly forms ice-water mixture to be discharged out of the cold water phase change machine, and realizing the continuous heat supply of the cold water phase change energy heat pump system; meanwhile, the double-door access hole facilitates the cold water phase change machine to be overhauled, and the overhauling space is saved.

Disclosure of Invention

The invention aims to provide a novel water source phase change heat exchange device and a heat pump system, which utilize the vertical reciprocating motion of a scraper to ensure that a cold water phase change machine can remove ice without dead angles and can discharge crushed ice-water mixture from an ice discharge port in time.

In order to solve the technical problems, the invention adopts the technical scheme that:

the invention provides a novel water source phase change heat exchange device which comprises heat exchange tubes, a tube bank, a cold water flow channel, a scraper, a first transmission chain, a second transmission chain, a first main shaft, a second main shaft, a first upper transmission wheel, a second upper transmission wheel, a first lower transmission wheel, a first transmission motor, a second transmission motor, a shell, an upper diversion box, a lower diversion box, an upper access door, a lower access door, an antifreezing aqueous solution inlet, an antifreezing aqueous solution outlet, a first ice discharge port, a second ice discharge port, a first ice discharge tube, a second ice discharge tube and a cold water inlet, wherein the heat exchange tubes form the tube bank in the vertical direction; cold water flow passages are reserved between the two tube rows and between the tube rows and the shell; the main shaft is arranged at two ends of the shell; the upper driving wheel is uniformly arranged on the main shaft along the axial direction; the lower transmission wheel is arranged at the lower part of the shell and vertically corresponds to the upper transmission wheel; the transmission chain is sleeved on the upper transmission wheel and the lower transmission wheel and can drive the lower transmission wheel to rotate along with the rotation of the upper transmission wheel; two ends of the scraper are connected with the transmission chain, and the scraper body is positioned in the cold water flow passage and vertically reciprocates up and down along the cold water flow passage under the transmission action of the transmission chain; the first main shaft is connected with the first transmission motor; the second main shaft is connected with a second transmission motor; the upper end of the shell is connected with the upper flow guide box, and the lower end of the shell is connected with the lower flow guide box; the lower part of the shell is provided with a cold water inlet, and the upper part of the shell is provided with an ice discharge port I and an ice discharge port II; the first ice discharge opening is communicated with the first ice discharge pipe; the second ice discharge port is communicated with the second ice discharge pipe; the cold water inlet is communicated with the cold water channel; the antifreezing water solution inlet is arranged at the left upper side of the upper diversion box; the anti-freezing water solution outlet is arranged at the right lower side of the lower diversion box.

The novel water source phase-change heat exchange device is characterized in that a guide wheel and ice scraping cutter teeth are arranged on the scraper.

The novel water source phase-change heat exchange device is characterized in that the upper access door and the lower access door are fixed at the upper end and the lower end of the shell respectively through pins and fixing bolts.

The novel water source phase-change heat exchange device further comprises an external observable stroke control device, wherein the external observable stroke control device comprises a slide rail, an upper stroke limit switch, a lower stroke limit switch, a limit collision block, a tensioning chain wheel and an external transmission chain, the upper stroke limit switch is arranged at the top end of the slide rail, and the lower stroke limit switch is arranged at the bottom end of the slide rail; the limiting collision block is sleeved on the slide rail and is connected with an external transmission chain; the tensioning chain wheel is arranged at the base of the shell; one end of the external transmission chain is connected with the tension chain wheel, and the other end of the external transmission chain is connected with the main shaft.

A novel water source phase-change heat pump system is characterized by comprising a first cold water phase-change machine, a second cold water phase-change machine, a heat pump unit, a deicing heat exchanger, a cold water pump, an intermediate water pump, a tail end water pump, a first electric valve, a second electric valve, a third electric valve, a fourth electric valve, a fifth electric valve, a sixth electric valve, a seventh electric valve, a first adjusting valve, a second adjusting valve, a tail end water supply pipe, a tail end water return pipe, a deicing heat exchanger water supply pipe, a deicing heat exchanger water return pipe, an intermediate water supply pipe, an intermediate water return pipe, a second intermediate water return pipe, a water source water inlet pipe, a water source water outlet pipe, an intermediate ice-melting water supply pipe, an intermediate, the heat pump unit, the cold water phase change machine I and the cold water phase change machine II form closed circulation through an intermediate water supply pipe and an intermediate water return pipe; the intermediate water pump is arranged on the intermediate water supply pipe; the tail end water supply pipe and the tail end water return pipe are respectively communicated with the heat pump unit; one end of the water source inlet pipe is communicated with the cold water phase change machine; the cold water pump is arranged on the water source inlet pipe; one end of the intermediary ice melting water supply pipe is communicated with the intermediary water return pipe, and the other end of the intermediary ice melting water supply pipe is communicated with the ice removing heat exchanger; the electric valve seven is arranged on the intermediary ice melting water supply pipe; one end of the medium ice melting water return pipe is communicated with the deicing heat exchanger, the other end of the medium ice melting water return pipe is communicated with the medium ice melting water return pipe I and the medium ice melting water return pipe II in parallel, and the communication point is positioned between the medium ice melting water return pipe I and the medium ice melting water return pipe II; one end of the medium ice melting water return pipe I is communicated with the medium ice melting water return pipe, the other end of the medium ice melting water return pipe I is communicated with the cold water phase change machine I, and the communication point is positioned between the cold water phase change machine I and the communication point between the medium water return pipe II and the medium water return pipe; the electric valve III is positioned between the two communication points; the electrically operated valve V is arranged on the medium ice melting water return pipe I; one end of the medium ice melting water return pipe II is communicated with the cold water phase change machine II, the medium ice melting water return pipe is communicated, and the communication point is positioned between the medium ice melting water return pipe and the communication point of the medium ice melting water return pipe I; the electric valve six and the electric valve four are arranged on the medium ice melting water return pipe II; one end of the water supply pipe of the deicing heat exchanger is communicated with the tail end water return pipe, and the other end of the water supply pipe of the deicing heat exchanger is communicated with the deicing heat exchanger; one end of the deicing heat exchanger water return pipe is communicated with the deicing heat exchanger, and the other end of the deicing heat exchanger water return pipe is communicated with the tail end water return pipe; the tail end water pump is arranged between the heat pump unit and a communication point of a water return pipe and a tail end water return pipe of the deicing heat exchanger; the regulating valve is positioned on the medium water return pipe and between a connection point of the medium ice-melting water supply pipe and the medium water return pipe and a connection point of the medium ice-melting water return pipe II and the medium water return pipe; and the second regulating valve is positioned on the tail end water return pipe and between a communication point of a water supply pipe and the tail end water return pipe of the deicing heat exchanger and a communication point of the water return pipe and the tail end water return pipe of the deicing heat exchanger.

The operation principle of the invention is as follows:

cold water flowing in the cold water flow passage exchanges heat with an anti-freezing aqueous solution at a temperature lower than 0 ℃ in the heat exchange pipe through the wall of the heat exchange pipe, partial cold water releases phase change energy and then freezes on the wall surface of the heat exchange pipe, when the freezing temperature reaches a certain thickness, an electric valve of an intermediate water pipeline connected with a first cold water phase change machine is closed, an electric valve of an intermediate pipeline connected with a second cold water phase change machine is opened, the cold water phase change machine finishes freezing and enters an ice discharging stage, and the cold water phase change machine begins to enter a freezing and heat; meanwhile, an ice melting electric valve of an intermediate water inlet pipe connected with the first cold water phase change machine is opened, part of the anti-freezing aqueous solution and hot water exchange heat in the ice removing heat exchanger, and after the temperature of the anti-freezing aqueous solution is increased to be higher than 0 ℃, an ice layer on the wall surface of a heat exchange pipe in the cold water phase change machine is heated and falls off. The scraper reciprocates from bottom to top to scrape the ice layer and brings the hung ice layer to the upper part of the cold water flow passage, and the wide flow passage design ensures that enough water quantity washes the ice layer away from the phase change machine. And after the deicing is finished, closing the deicing control valve, and repeatedly operating in the way.

Compared with the prior art, the invention has the following characteristics and beneficial effects:

1. the scraper vertically reciprocates up and down along the cold water flow channel under the traction action of the transmission chain to scrape the ice layer, so that the ice layer on the wall surface of the heat exchange tube can be uniformly scraped without dead corners, and the heat exchange efficiency is improved.

2. The horizontal cold water phase change machine is changed into the vertical cold water phase change machine, so that the scraper is guaranteed to be only subjected to the gravity and the frictional resistance of an ice layer, the shearing resistance of the welding line of the wall of the tube bank is avoided, and the service lives of the chain and the scraper are greatly prolonged.

3. The invention saves an ice breaking propeller, increases the clearance between the tube rows, utilizes large-flow water flow to discharge the broken ice layer out of the cold water phase change machine, improves the stability and the reliability of the operation of the equipment and greatly reduces the manufacturing cost.

4. The invention changes the original left and right one-way access door into the up and down two-way access door, saves the access space of the cold water phase change machine and is more convenient to detect and maintain the middle heat exchange tube.

5. The running system of the invention is provided with two cold water phase change machines, when one cold water set enters a deicing state, the running system can be automatically switched to the other cold water phase change machine to continuously make ice and heat, thereby ensuring the uninterrupted heat supply of a heat pump system.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is a top view of the present invention;

FIG. 4 is a schematic structural diagram of a first embodiment of the present invention;

FIG. 5 is a schematic diagram of the system of the present invention;

in the figure, a heat exchange pipe 1, a pipe row 2, a cold water runner 3, a scraper 4, a transmission chain I5-1, a transmission chain II 5-2, a main shaft I6-1, a main shaft II 6-2, an upper transmission wheel I7-1, an upper transmission wheel II 7-2, a lower transmission wheel I8-1, a lower transmission wheel II 8-2, a transmission motor I9-1, a transmission motor II 9-2, a shell 10, an upper diversion box 11, a lower diversion box 12, an upper access door 13, a lower access door 14, an antifreezing aqueous solution inlet 15, an antifreezing aqueous solution outlet 16, an ice discharge opening I17-1, an ice discharge opening II 17-2, an ice discharge pipe I18-1, an ice discharge pipe II 18-2, a cold water inlet 19, a pin 20, a fixing bolt 21, a guide wheel 22, an ice scraper tooth 23, a cold water phase change machine I24-1, a phase change machine II 24-2, a cold water phase change machine II, A heat pump unit 25, a deicing heat exchanger 26, a cold water pump 27, an intermediary water pump 28, a tail end water pump 29, an electric valve I30-1, an electric valve II 30-2, an electric valve III 30-3, an electric valve IV 30-4, an electric valve V30-5, an electric valve VI 30-6, an electric valve VII 30-7, a regulating valve I31-1, a regulating valve II 31-2, a tail end water supply pipe 32, a tail end water return pipe 33, a deicing heat exchanger water supply pipe 34, a deicing heat exchanger water return pipe 35, an intermediary water supply pipe 36, an intermediary water return pipe 37, an intermediary water return pipe I37-1, an intermediary water return pipe II 37-2, an intermediary water inlet pipe 38, a water source water outlet pipe 39, an intermediary ice melting water supply pipe 40, an intermediary ice melting water return pipe 41, an intermediary ice melting water return pipe I41-1, an intermediary, The device comprises a slide rail 43, an upper travel limit switch 44, a lower travel limit switch 45, a limit collision block 46, a tension sprocket 47 and an external transmission chain 48.

Detailed Description

In a first specific embodiment, as shown in fig. 1 to 3, the novel water source phase change heat exchange device of the first embodiment comprises heat exchange tubes 1, a tube bank 2, a cold water channel 3, a scraper 4, a first transmission chain 5-1, a second transmission chain 5-2, a first main shaft 6-1, a second main shaft 6-2, a first upper transmission wheel 7-1, a second upper transmission wheel 7-2, a second lower transmission wheel 8-1, a second lower transmission wheel 8-2, a first transmission motor 9-1, a second transmission motor 9-2, a shell 10, an upper diversion box 11, a lower diversion box 12, an upper access door 13, a lower access door 14, an antifreeze aqueous solution inlet 15, an antifreeze aqueous solution outlet 16, a first ice discharge port 17-1, a second ice discharge port 17-2, a first ice discharge tube 18-1, a second ice discharge tube 18-2 and a cold water inlet 19, wherein the plurality of heat exchange tubes 1 are arranged in a vertical direction, the upper end and the lower end of a plurality of heat exchange tubes 1 are respectively communicated with an upper flow guide box 11 and a lower flow guide box 12; a cold water flow passage 3 is reserved between the two tube rows 2 and between the tube row 2 and the shell 10; the main shaft 6 is arranged at two ends of the shell 10; the upper driving wheels 7 are uniformly arranged on the main shaft 6 along the axial direction; the lower transmission wheel 8 is arranged at the lower part of the shell 10 and is vertically and correspondingly arranged with the upper transmission wheel 7; the transmission chain 5 is sleeved on the upper transmission wheel 7 and the lower transmission wheel 8 and can drive the lower transmission wheel 8 to rotate along with the rotation of the upper transmission wheel 7; two ends of the scraper 4 are connected with the transmission chain 5, and the scraper body of the scraper 4 is positioned in the cold water flow channel 3 and vertically reciprocates up and down along the cold water flow channel 3 under the transmission action of the transmission chain 5; the main shaft I6-1 is connected with the transmission motor I9-1; the second main shaft 6-2 is connected with a second transmission motor 9-2; the upper end of the shell 10 is connected with the upper flow guide box 11, and the lower end of the shell 10 is connected with the lower flow guide box 12; a cold water inlet 19 is arranged at the lower part of the shell 10, and a first ice discharge port 17-1 and a second ice discharge port 17-2 are arranged at the upper part of the shell 10; the first ice discharge port 17-1 is communicated with the first ice discharge pipe 18-1; the second ice discharge port 17-2 is communicated with the second ice discharge pipe 18-2; the cold water inlet 19 is communicated with the cold water channel 3; the antifreezing water solution inlet 15 is arranged at the left upper side of the upper diversion box 11; the antifreeze aqueous solution outlet 16 is arranged at the lower right side of the lower guide box 12.

In the second embodiment, as shown in fig. 2, the guide wheel 22 and the ice scraping teeth 23 are arranged on the scraper 4 of the novel water source phase change heat exchange device of the second embodiment. The beneficial effects of this embodiment are that reduce the collision of scraper and heat transfer wall, increase the life of scraper.

In a third embodiment, as shown in fig. 3, in the novel water source phase change heat exchanger of this embodiment, the upper access door 13 and the lower access door 14 are respectively fixed at the upper end and the lower end of the casing 10 by a pin 20 and a fixing bolt 21.

In a fourth specific embodiment, as shown in fig. 4, the novel water source phase-change heat exchange device of this embodiment further includes an external observable stroke control device 42, where the external observable stroke control device 42 includes a slide rail 43, an upper stroke limit switch 44, a lower stroke limit switch 45, a limit bump 46, a tension sprocket 47 and an external transmission chain 48, the top end of the slide rail 43 is provided with the upper stroke limit switch 44, and the lower part of the slide rail 43 is provided with the bottom stroke limit switch 45; the limiting collision block 46 is sleeved on the slide rail 43 and is connected with an external transmission chain 48; the tension chain wheel 47 is arranged at the base of the shell 10; one end of the external transmission chain 48 is connected with the tension chain wheel 47, and the other end is connected with the main shaft 6. The beneficial effects of this embodiment are that external observable stroke controlling means can carry out limit control to the up-and-down reciprocating motion of scraper, prevents to appear damaging mechanical parts beyond a journey. In addition, the external chain collision block and the scraper synchronously reciprocate, so that the debugging and observation are convenient, and the movement track is error-free.

In a fifth embodiment, as shown in fig. 5, a novel water source phase change heat exchange device and heat pump system of this embodiment comprises a first cold water phase change machine 24-1, a second cold water phase change machine 24-2, a heat pump unit 25, a deicing heat exchanger 26, a cold water pump 27, an intermediate water pump 28, a tail end water pump 29, a first electric valve 30-1, a second electric valve 30-2, a third electric valve 30-3, a fourth electric valve 30-4, a fifth electric valve 30-5, a sixth electric valve 30-6, a seventh electric valve 30-7, a first regulating valve 31-1, a second regulating valve 31-2, a tail end water supply pipe 32, a tail end water return pipe 33, a deicing heat exchanger water supply pipe 34, a deicing heat exchanger water return pipe 35, an intermediate water supply pipe 36, an intermediate water return pipe 37-1, an intermediate water return pipe 37-2, The heat pump unit 25, the cold water phase change machine I24-1 and the cold water phase change machine II 24-2 form closed circulation through the intermediary water supply pipe 36 and the intermediary water return pipe 37; the intermediate water pump 28 is arranged on an intermediate water supply pipe 36; the tail end water supply pipe 32 and the tail end water return pipe 33 are respectively communicated with the heat pump unit 25; one end of the water source inlet pipe (38) is communicated with the second cold water phase change machine (24-2); the cold water pump 27 is arranged on a water source inlet pipe 38; one end of the intermediary ice melting water supply pipe 40 is communicated with the intermediary water return pipe 37, and the other end is communicated with the deicing heat exchanger 26; the electric valve seven 30-7 is arranged on the intermediary ice melting water supply pipe 40; one end of the medium ice melting water return pipe 41 is communicated with the deicing heat exchanger 26, the other end of the medium ice melting water return pipe 41 is communicated with the medium ice melting water return pipe I41-1 and the medium ice melting water return pipe II 41-2 in parallel, and the communication point is positioned between the medium ice melting water return pipe I41-1 and the medium ice melting water return pipe II 41-2; one end of the medium ice-melting water return pipe I41-1 is communicated with the medium ice-melting water return pipe 41, the other end of the medium ice-melting water return pipe I is communicated with the cold water phase change machine I24-1, and the communication point is positioned between the cold water phase change machine I24-1 and the communication point between the medium water return pipe II 37-2 and the medium water return pipe 37; the electric valve III 30-3 is positioned between the two communication points; the electric valve V30-5 is arranged on the medium ice melting water return pipe I41-1; one end of the medium ice melting water return pipe II 41-2 is communicated with the cold water phase change machine II 24-2, the medium ice melting water return pipe 41 is communicated, and the communication point is positioned between the medium ice melting water return pipe 41 and the communication point of the medium ice melting water return pipe I41-1; the electric valve six 30-6 and the electric valve four 30-4 are arranged on the medium ice melting water return pipe two 41-2; one end of the deicing heat exchanger water supply pipe 34 is communicated with the tail end water return pipe 33, and the other end is communicated with the deicing heat exchanger 26; one end of the deicing heat exchanger water return pipe 35 is communicated with the deicing heat exchanger 26, and the other end of the deicing heat exchanger water return pipe is communicated with the tail end water return pipe 33; the tail end water pump 29 is arranged between the heat pump unit 25 and a communication point of the deicing heat exchanger water return pipe 35 and the tail end water return pipe 33; the regulating valve I31-1 is positioned on the intermediary water return pipe 37 and is positioned between the communication point of the intermediary ice-melting water supply pipe 40 and the intermediary water return pipe 37 and the communication point of the intermediary ice-melting water return pipe II 41-2 and the intermediary water return pipe 37; and the second regulating valve 31-2 is positioned on the tail end water return pipe 33 and is positioned between a communication point of a water supply pipe 34 of the deicing heat exchanger and the tail end water return pipe 33 and a communication point of a water return pipe 35 of the deicing heat exchanger and the tail end water return pipe 33.

Principle of operation

Under the action of a cold water pump 27, cold water enters a cold water runner 3 corresponding to a cold water phase change machine I24-1 from a cold water inlet 19, the cold water flows in the cold water runner 3 and exchanges heat with an anti-freezing aqueous solution with the temperature lower than 0 ℃ in a heat exchange tube 1 through the wall of the heat exchange tube, partial cold water releases phase change energy and then freezes on the wall surface of the heat exchange tube 1, when the freezing reaches a certain thickness, electric valves 30-2 and 30-3 are closed, an electric valve 30-1 is opened, the cold water and the medium anti-freezing aqueous solution are switched to a cold water phase change machine II 24-2 from the cold water phase change machine I24-1, the cold water phase change machine I24-1 enters a deicing state, and the; meanwhile, the electric valves 30-5 and 30-7 are opened, a switching part of the anti-freezing aqueous solution enters the ice melting heat exchanger 26 to exchange heat with hot water at the tail end, when the temperature of the anti-freezing aqueous solution is raised to be higher than 0 ℃, an ice layer on the wall surface of the heat exchange tube 1 in the cold water phase change machine 24-1 is heated and falls off, at the moment, the first transmission motor 9-1 and the second transmission motor 9-2 start to work simultaneously, the scraper 4 reciprocates along the cold water flow channel 3 from bottom to top under the action of the pulling force of the transmission chains 5-1 and 5-2 to scrape the ice layer, the cold water flow carries the ice layer out of the cold water flow channel 3 after the scraper 4 scrapes the ice layer from the tube row, and an ice-water mixture flows out of the cold. After the ice layer falls off, the electric valves 30-5 and 30-7 are closed, after the ice layer 24-2 of the second cold water phase change machine is connected to a certain thickness, the electric valves 30-1 and 30-4 are closed, the electric valves 30-2 and 30-3 are opened, cold water and a medium antifreezing water solution enter the first cold water phase change machine 24-1 again, and the first cold water phase change machine 24-1 enters the icing and heat-taking stage again; meanwhile, the electric valves 30-6 and 30-7 are opened, and the second cold water phase change machine 24-2 enters an ice discharging state, so that continuous heat exchange is repeatedly circulated. Under the action of the intermediate water pump 28, the intermediate heat exchange medium enters the heat pump unit 25 through the intermediate water supply pipe 36, releases heat in the heat pump unit 25 and then enters the cold water phase change machine 24 through the intermediate water return pipe 37, and the intermediate heat exchange medium absorbs phase change latent heat of water in the cold water phase change machine 24 and then flows into the intermediate water supply pipe 36 to complete closed circulation. Under the action of the tail-end water pump 29, tail-end water enters the heat pump unit 25 through the tail-end water return pipe 33, absorbs heat in the heat pump unit 25 and is heated, and then the heat is sent to a user through the tail-end water supply pipe 33 for heating.

The foregoing merely illustrates the principles and features of the invention, which is not to be limited to the specific embodiments described herein, but is capable of numerous modifications and variations within the spirit and scope of the invention as hereinafter claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A novel water source phase change heat exchange device is characterized by comprising a heat exchange tube (1), a tube bank (2), a cold water flow channel (3), a scraper (4), a transmission chain I (5-1), a transmission chain II (5-2), a main shaft I (6-1), a main shaft II (6-2), an upper transmission wheel I (7-1), an upper transmission wheel II (7-2), a lower transmission wheel I (8-1), a lower transmission wheel II (8-2), a transmission motor I (9-1), a transmission motor II (9-2), a shell (10), an upper flow guide box (11), a lower flow guide box (12), an upper access door (13), a lower access door (14), an antifreezing aqueous solution inlet (15), an antifreezing aqueous solution outlet (16), an ice discharge port I (17-1), an ice discharge port II (17-2), The heat exchanger comprises a first ice discharge pipe (18-1), a second ice discharge pipe (18-2) and a cold water inlet (19), wherein the plurality of heat exchange pipes (1) form a pipe row (2) in the vertical direction, and the upper end and the lower end of each of the plurality of heat exchange pipes (1) are respectively communicated with an upper flow guide box (11) and a lower flow guide box (12); cold water flow channels (3) are reserved between the two tube rows (2) and between the tube rows (2) and the shell (10); the main shaft (6) is arranged at two ends of the shell (10); the upper driving wheels (7) are uniformly arranged on the main shaft (6) along the axial direction; the lower driving wheel (8) is arranged at the lower part of the shell (10) and is vertically and correspondingly arranged with the upper driving wheel (7); the transmission chain (5) is sleeved on the upper transmission wheel (7) and the lower transmission wheel (8) and can drive the lower transmission wheel (8) to rotate along with the rotation of the upper transmission wheel (7); two ends of the scraper (4) are connected with the transmission chain (5), and the blade of the scraper (4) is positioned in the cold water flow passage (3) and vertically reciprocates along the cold water flow passage (3) under the transmission action of the transmission chain (5); the first main shaft (6-1) is connected with the first transmission motor (9-1); the second main shaft (6-2) is connected with a second transmission motor (9-2); the upper end of the shell (10) is connected with the upper flow guide box (11), and the lower end of the shell (10) is connected with the lower flow guide box (12); a cold water inlet (19) is arranged at the lower part of the shell (10), and a first ice discharge port (17-1) and a second ice discharge port (17-2) are arranged at the upper part of the shell (10); the first ice discharge port (17-1) is communicated with the first ice discharge pipe (18-1); the second ice discharge port (17-2) is communicated with the second ice discharge pipe (18-2); the cold water inlet (19) is communicated with the cold water flow passage (3); the antifreezing water solution inlet (15) is arranged at the left upper side of the upper diversion box (11); the antifreezing water solution outlet (16) is arranged at the right lower side of the lower diversion box (12).

2. The novel water source phase-change heat exchange device as claimed in claim 1, wherein the scraper (4) is provided with a guide wheel (22) and ice scraping teeth (23).

3. The novel water source phase-change heat exchange device as claimed in claim 1, wherein the upper access door (13) and the lower access door (14) are respectively fixed at the upper end and the lower end of the shell (10) by a pin (20) and a fixing bolt (21).

4. The novel water source phase-change heat exchange device as claimed in claim 1, further comprising an external observable travel control device (42), wherein the external observable travel control device (42) comprises a slide rail (43), an upper travel limit switch (44), a lower travel limit switch (45), a limit bump (46), a tension sprocket (47) and an external transmission chain (48), the upper travel limit switch (44) is arranged at the top end of the slide rail (43), and the lower travel limit switch (45) is arranged at the bottom end of the slide rail (43); the limiting collision block (46) is sleeved on the slide rail (43) and is connected with an external transmission chain (48); the tensioning chain wheel (47) is arranged at the footing of the shell (10); one end of the external transmission chain (48) is connected with the tension chain wheel (47), and the other end is connected with the main shaft (6).

5. A novel water source phase-change heat pump system is characterized by comprising a first cold water phase-change machine (24-1), a second cold water phase-change machine (24-2), a heat pump unit (25), a deicing heat exchanger (26), a cold water pump (27), an intermediate water pump (28), a tail end water pump (29), a first electric valve (30-1), a second electric valve (30-2), a third electric valve (30-3), a fourth electric valve (30-4), a fifth electric valve (30-5), a sixth electric valve (30-6), a seventh electric valve (30-7), a first regulating valve (31-1), a second regulating valve (31-2), a tail end water supply pipe (32), a tail end water return pipe (33), a deicing heat exchanger water supply pipe (34), a deicing heat exchanger water return pipe (35), an intermediate water supply pipe (36), an intermediate water return pipe (37), The system comprises a medium water return pipe I (37-1), a medium water return pipe II (37-2), a water source water inlet pipe (38), a water source water outlet pipe (39), a medium ice melting water supply pipe (40), a medium ice melting water return pipe (41), a medium ice melting water return pipe I (41-1) and a medium ice melting water return pipe II (41-2), wherein the heat pump unit (25), the cold water phase change machine I (24-1) and the cold water phase change machine II (24-2) form closed circulation through the medium water supply pipe (36) and the medium water return pipe (37); the intermediate water pump (28) is arranged on the intermediate water supply pipe (36); the tail end water supply pipe (32) and the tail end water return pipe (33) are respectively communicated with the heat pump unit (25); one end of the water source inlet pipe (38) is communicated with the second cold water phase change machine (24-2); the cold water pump (27) is arranged on the water source inlet pipe (38); one end of the intermediary ice melting water supply pipe (40) is communicated with the intermediary water return pipe (37), and the other end is communicated with the deicing heat exchanger (26); the electric valve seven (30-7) is arranged on the intermediary ice melting water supply pipe (40); one end of the medium ice melting water return pipe (41) is communicated with the deicing heat exchanger (26), the other end of the medium ice melting water return pipe is communicated with the medium ice melting water return pipe I (41-1) and the medium ice melting water return pipe II (41-2) in parallel, and the communication point is positioned between the medium ice melting water return pipe I (41-1) and the medium ice melting water return pipe II (41-2); one end of the medium ice-melting water return pipe I (41-1) is communicated with the medium ice-melting water return pipe (41), the other end of the medium ice-melting water return pipe I is communicated with the cold water phase change machine I (24-1), and the communication point is positioned between the cold water phase change machine I (24-1) and the communication point of the medium water return pipe II (37-2) and the medium water return pipe (37); the electric valve III (30-3) is positioned between the two communication points; the electric valve V (30-5) is arranged on the medium ice melting water return pipe I (41-1); one end of the medium ice melting water return pipe II (41-2) is communicated with the cold water phase change machine II (24-2), the medium ice melting water return pipe (41) is communicated, and the communication point is positioned between the medium ice melting water return pipe (41) and the communication point of the medium ice melting water return pipe I (41-1); the electric valve six (30-6) and the electric valve four (30-4) are arranged on the medium ice melting water return pipe two (41-2); one end of a water supply pipe (34) of the deicing heat exchanger is communicated with a tail end water return pipe (33), and the other end of the water supply pipe is communicated with the deicing heat exchanger (26); one end of the deicing heat exchanger water return pipe (35) is communicated with the deicing heat exchanger (26), and the other end of the deicing heat exchanger water return pipe is communicated with the tail end water return pipe (33); the tail end water pump (29) is arranged between the heat pump unit (25) and a communication point of a water return pipe (35) of the deicing heat exchanger and a tail end water return pipe (33); the regulating valve I (31-1) is positioned on the intermediary water return pipe (37) and is positioned between the communication point of the intermediary ice melting water supply pipe (40) and the intermediary water return pipe (37) and the communication point of the intermediary ice melting water return pipe II (41-2) and the intermediary water return pipe (37); and the second adjusting valve (31-2) is positioned on the tail end water return pipe (33) and is positioned between a communication point of a water supply pipe (34) of the deicing heat exchanger and the tail end water return pipe (33) and a communication point of a water return pipe (35) of the deicing heat exchanger and the tail end water return pipe (33).