Hygienic electromagnetic heating heat exchanger and water circulation system for pharmaceutical plant

Abstract

A sanitary electromagnetic heating heat exchanger and a water circulation system for pharmaceutical workshops are disclosed. The heat exchanger includes a liquid flow pipe, a heating tube, a heat insulation layer, an electromagnetic coil, and an outer sleeve. The heating tube is fitted over the outside of the liquid flow pipe, and a heat-conducting medium is filled between the heating tube and the liquid flow pipe. The heat generated by the heating tube is transferred to the liquid flow pipe through the heat-conducting medium to heat the water for injection inside the liquid flow pipe. The heat insulation layer is fitted over the outside of the heating tube to prevent the heat generated by the heating tube from escaping and to improve the utilization rate of the heat generated by the heating tube. The electromagnetic coil is fitted over the outside of the heat insulation layer. The electromagnetic coil acts on the heating tube, causing the heating tube to heat up. The heat from the heating tube is transferred to the liquid flow pipe through the heat-conducting medium to increase the temperature of the liquid inside the liquid flow pipe. The outer sleeve is fitted over the outside of the electromagnetic coil to provide protection for the electromagnetic coil.

Description

Technical Field

[0001] This invention relates to a water-for-injection circulation system, specifically to a sanitary electromagnetic heating heat exchanger and a water circulation system for use in pharmaceutical workshops. Background Technology

[0002] Existing water-for-injection circulation and distribution systems require maintaining a temperature ≥70℃. However, the temperature of the water-for-injection decreases during circulation due to temperature losses. Currently, industrial steam heat exchangers are commonly used at the return end of the water-for-injection circulation system to reheat the water. However, some pharmaceutical workshops lack an industrial steam supply for these heat exchangers, making it impossible to maintain the circulating temperature of the water-for-injection. The disadvantage of using electrically heated boilers to generate industrial steam is the low energy efficiency.

[0003] An electromagnetic heater is a device that converts electrical energy into heat energy using the principle of electromagnetic induction. The electromagnetic heating controller converts 380V 50 / 60Hz three-phase AC power into DC power, and then into high-frequency, low-voltage, high-current electricity of 10-30kHz. The rapidly changing high-frequency, high-voltage current flowing through the coil generates a rapidly changing alternating magnetic field. When an iron-containing container is placed on it, the surface of the container cuts the alternating magnetic field lines, generating an alternating current (eddy current) in the metal part at the bottom of the container. The eddy current causes the charge carriers at the bottom of the container to move at high speed and randomly, colliding and rubbing against each other to generate heat energy. This achieves the effect of heating the object. In essence, it is a heating method that converts electrical energy into magnetic energy to induce eddy currents on the surface of the heated steel body, used for heating industrial products.

[0004] Most electromagnetic heaters on the market currently heat single liquid flow pipes, resulting in relatively low heating efficiency. Under normal conditions, the liquid in a single liquid flow pipe is heated in a layered manner, meaning that the liquid temperature gradually decreases from the pipe wall to the center. This leads to uneven liquid heating and low heating efficiency, which is not conducive to the recycling of water for injection. Summary of the Invention

[0005] To address the above shortcomings, the technical problem to be solved by the present invention is to provide a hygienic electromagnetic heating heat exchanger and a water circulation system for pharmaceutical workshops. This heat exchanger can rapidly heat water for injection, maintain uniform heating of water for injection within the heat exchanger, and maintain the overall temperature of the water for injection circulation system.

[0006] To solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0007] A sanitary electromagnetic heating heat exchanger is characterized by comprising a heat exchanger, which includes multiple liquid flow pipes, a heating tube, and an electromagnetic coil. The multiple liquid flow pipes are arranged inside the heating tube, and the electromagnetic coil is arranged outside the heating tube. A heat-conducting medium is filled between the heating tube and the liquid flow pipes. The heating tube is triggered by the electromagnetic coil to increase the temperature of the liquid in the liquid flow pipe. Heat-conducting fins are provided inside the heating tube, and a waste heat recovery mechanism for accelerating liquid heating is arranged outside the heating tube. The waste heat recovery mechanism is adapted to the heat-conducting fins.

[0008] As a preferred embodiment of the present invention, the waste heat recovery mechanism includes a waste heat recovery pipeline and an outlet connector and a waste heat recovery connector connected to both ends of the heat exchanger. The waste heat recovery pipeline is connected to the outlet connector and the waste heat recovery connector respectively, and the waste heat recovery pipeline is arranged between the heating tube body and the heat insulation layer.

[0009] As a preferred embodiment of the present invention, a waste heat recovery groove is provided on the outer wall of the heating tube, and the waste heat recovery pipeline is arranged in the waste heat recovery groove.

[0010] As a preferred embodiment of the present invention, a finned unit is connected inside the heating tube, and adjacent finned units are joined together to form a heat-conducting fin. The heat-conducting fin is arranged facing the liquid flow pipe, and a waste heat recovery groove is formed between adjacent heat-conducting fins.

[0011] As a preferred embodiment of the present invention, the heating tube has an inlet chamber and an outlet chamber at both ends, which are connected by a waste heat recovery pipeline. The inlet chamber is connected to the outlet connector, and the outlet chamber is connected to the waste heat recovery connector.

[0012] As a preferred embodiment of the present invention, the fin unit includes an inclined portion and a heat-conducting portion. When adjacent fin units are assembled, a waste heat recovery groove is formed between adjacent inclined portions, and the heat-conducting portion forms a heat-conducting straight plate.

[0013] As a preferred embodiment of the present invention, the water outlet connector includes a water outlet flange and a water outlet regulating valve. The water outlet regulating valve is installed on the heating tube body through the water outlet flange. A heat recovery liquid outlet pipe is provided on the side wall of the water outlet flange and is connected to the waste heat recovery pipeline.

[0014] As a preferred embodiment of the present invention, a temperature sensor is installed inside the water outlet connector, and the temperature sensor is connected to the water outlet regulating valve.

[0015] As a preferred embodiment of the present invention, the waste heat recovery joint includes a joint sleeve and a heat exchange pipe. The joint sleeve is connected to the heating tube body, and the heat exchange pipe is arranged inside the joint sleeve and connected to the waste heat recovery pipeline.

[0016] A water-for-injection circulation system includes a storage tank, a delivery pump, a water connector, and an electromagnetically heated heat exchanger connected in sequence. The electromagnetically heated heat exchanger is connected to the storage tank to form a water-for-injection circulation loop. The heat exchange pipe in the electromagnetically heated heat exchanger is connected to the storage tank to guide the liquid after heat recovery treatment into the storage tank.

[0017] The beneficial effects of the present invention are: (1) by setting an electromagnetic heating coil on the heat exchanger to heat the water for injection during the circulation process, the temperature of the water for injection circulation system is maintained.

[0018] (2) The recovered heat is transferred to the middle of the inlet of the heating tube through the waste heat recovery mechanism, so that the temperature in the middle of the inlet increases, thereby making the initial injection temperature of the liquid entering the middle liquid flow pipe higher than the initial injection temperature of the liquid entering the circumferential liquid flow pipe, thus ensuring that the liquid outlet temperature of the middle liquid flow pipe and the circumferential liquid flow pipe remains basically the same. Attached Figure Description

[0019] Figure 1 This is a half-sectional schematic diagram of a heat exchanger.

[0020] Figure 2 This is a schematic diagram showing the connection between the heating element and the water outlet connector and the waste heat recovery connector.

[0021] Figure 3 This is a half-section diagram of the heating element.

[0022] Figure 4 This is a schematic diagram of the heating element.

[0023] Figure 5 This is a schematic diagram of the water outlet connector.

[0024] Figure 6 This is a schematic diagram of a waste heat recovery connector.

[0025] Figure 7 This is a schematic diagram of a water-for-injection circulation system.

[0026] Reference numerals: Heat exchanger 1, liquid flow pipe 1-1, heating tube 1-2, main pipe 1-2-1, end connecting pipe 1-2-2, liquid flow pipe flange 1-2-3, joint connecting flange 1-2-4, end plate 1-2-5, heat insulation layer 1-3, electromagnetic coil 1-4, outer sleeve 1-5, waste heat recovery pipe 1-6, water outlet joint 1-7, waste heat recovery joint 1-8, waste heat recovery groove 1-9, finned unit 1-10, heat-conducting fin 1-11, liquid inlet chamber 1-12, liquid outlet chamber 1-13, inclined part 1-14, heat-conducting part 1-15, water outlet flange 1-16, water outlet regulating valve 1-17, heat energy recovery liquid outlet pipe 1-18, temperature sensor 1-19, joint sleeve 1-20, heat exchange pipe 1-21, storage tank 2, transfer pump 3, water connector 4. Detailed Implementation

[0027] The present invention will now be further described with reference to the accompanying drawings.

[0028] A sanitary electromagnetic heating heat exchanger includes a heat exchanger 1. The heat exchanger 1 includes multiple liquid flow pipes 1-1, a heating tube 1-2, a heat insulation layer 1-3, an electromagnetic coil 1-4, and an outer sleeve 1-5. The heating tube 1-2 is sleeved on the outside of the multiple liquid flow pipes 1-1. A heat-conducting medium is filled between the heating tube 1-2 and the liquid flow pipes 1-1. The heat generated by the heating tube 1-2 is transferred to the liquid flow pipes 1-1 through the heat-conducting medium to heat the water for injection inside the liquid flow pipes 1-1. The heat insulation layer 1-3 is sleeved on the heating tube 1-5. The outer side of the tube 1-2 prevents the heat generated by the heating tube 1-2 from overflowing and improves the heat utilization rate of the heating tube 1-2. The electromagnetic coil 1-4 is sleeved on the outside of the heat insulation layer 1-3. The electromagnetic coil 1-4 acts on the heating tube 1-2, causing the heating tube 1-2 to heat up. The heat of the heating tube 1-2 is transferred to the liquid flow pipe 1-1 through the heat conduction medium to increase the liquid temperature in the liquid flow pipe 1-1. The outer sleeve 1-5 is sleeved on the outside of the electromagnetic coil 1-4 to provide protection for the electromagnetic coil 1-4.

[0029] In this embodiment, the thickness of the heat insulation layer 1-3 is 20-25mm, so that the distance between the electromagnetic coil 1-4 and the heating tube 1-2 is 20-25mm, thereby ensuring that the electrical energy of the electromagnetic coil 1-4 is converted into the heat energy of the heating tube 1-2. The heat insulation layer 1-3 includes a heat insulation layer and a heat insulation layer. The heat insulation layer is sleeved on the outside of the heating tube 1-2, and the heat insulation layer is sleeved on the outside of the heat insulation layer. The heat generated by the heating tube 1-2 is isolated in the heat insulation layer through the heat insulation layer. The heat insulation layer is used to keep the heat insulation layer warm, on the one hand to prevent the external temperature from affecting the heat insulation layer, and on the other hand to prevent heat loss through the heat insulation layer, thereby further improving the thermal efficiency of the device.

[0030] Heat-conducting fins are provided inside the heating tube 1-2, and a waste heat recovery mechanism for accelerating liquid heating is provided on the outside of the heating tube 1-2. The waste heat recovery mechanism is adapted to the heat-conducting fins. The waste heat recovery mechanism recovers the waste heat on the outside of the heating tube 1-2 and transfers the recovered heat to the middle of the liquid inlet of the heating tube 1-2, thereby raising the temperature in the middle of the liquid inlet. This makes the initial injection temperature of the liquid entering the middle liquid flow pipe 1-1 higher than the initial injection temperature of the liquid entering the circumferential liquid flow pipe 1-1, thus ensuring that the liquid outlet temperature of the middle liquid flow pipe 1-1 and the circumferential liquid flow pipe 1-1 remains basically the same.

[0031] The heating element 1-2 includes a main tube 1-2-1, an end connecting tube 1-2-2, a liquid flow pipe flange 1-2-3, a connector flange 1-2-4, and an end plate 1-2-5. The liquid flow pipe flange 1-2-3 is fixedly connected inside the main tube 1-2-1. Both ends of the liquid flow pipe 1-1 are connected to the liquid flow pipe flanges 1-2-3 on both sides, and there is a certain height difference between the liquid flow pipe flanges 1-2-3 and the ends of the main tube 1-2-1. The end connecting tube 1-2-2 is connected to the liquid flow pipe flange 1-2-3, and the end connecting tube 1-2-5... Two parts extend out of the main tube 1-2-1. The end plate 1-2-5 is connected to the end face of the main tube 1-2-1 and to the side wall of the end connecting pipe 1-2-2. A chamber is formed between the end plate 1-2-5 and the liquid flow pipe flange plate 1-2-3, which is connected to the waste heat recovery pipe 1-6. The chamber located at the rear end of the heating tube 1-2 is the liquid inlet chamber 1-12, and the chamber located at the front end of the heating tube 1-2 is the liquid outlet chamber 1-13. The joint connecting flange 1-2-4 is connected to the end connecting pipe 1-2-2 for connecting with the components arranged on both sides of the heat exchanger 1.

[0032] In this embodiment, multiple liquid flow pipes 1-1 are evenly arranged inside the heating tube body 1-2 to facilitate heat exchange between the liquid flow pipes 1-1 and the heat transfer medium, thereby improving the efficiency of the heat exchanger 1. The openings of the multiple liquid flow pipes 1-1 are evenly arranged inside the end connecting pipe 1-2-2 to facilitate the flow of water for injection through the end connecting pipe 1-2-2.

[0033] Finned units 1-10 are connected to the side wall of the main tube 1-2-1. Adjacent finned units 1-10 are joined together to form heat-conducting fins 1-11. The heat-conducting fins 1-11 are positioned facing the liquid flow pipe 1-1. Waste heat recovery grooves 1-9 are formed between adjacent heat-conducting fins 1-11. The surface area of ​​the main tube 1-2-1 is increased by the finned units 1-10, thereby increasing the heat transfer area of ​​the main tube 1-2-1 and further improving the heating efficiency of the injection water in the liquid flow pipe 1-1.

[0034] The waste heat recovery groove 1-9 is located on the outside of the main tube 1-2-1, which facilitates the recovery and utilization of heat energy between the heat insulation layer 1-3 and the main tube 1-2-1.

[0035] The finned unit 1-10 includes an inclined portion 1-14 and a heat-conducting portion 1-15. When adjacent finned units 1-10 are assembled, a waste heat recovery groove 1-9 is formed between adjacent inclined portions 1-14. The waste heat recovery groove 1-9 recovers the excess heat outside the heating tube 1-2. The heat-conducting portion 1-15 forms a heat-conducting straight plate that extends into the main tube 1-2-1, increasing the contact area between the main tube 1-2-1 and the heat-conducting medium, and improving the heating rate of the heat-conducting medium.

[0036] Waste heat recovery pipe 1-6 is connected in the waste heat recovery groove 1-9. Waste heat recovery pipe 1-6 is connected to the inlet chamber 1-12 and the outlet chamber 1-13 respectively. The water for injection in the inlet chamber 1-12 flows into the outlet chamber 1-13 through the waste heat recovery pipe 1-6 to heat the water for injection. The water for injection in the outlet chamber 1-13 flows into the waste heat recovery connector 1-8 to heat the water for injection entering the front end of the heat exchanger 1, thereby improving the utilization rate of heat energy.

[0037] In this embodiment, the diameter of the waste heat recovery pipeline 1-6 is much smaller than the diameter of the liquid flow pipeline 1-1, which facilitates the rapid heating of the waste heat recovery pipeline 1-6 and increases the heating rate of the water for injection in the waste heat recovery pipeline 1-6.

[0038] Water outlet connector 1-7 and waste heat recovery connector 1-8 are respectively connected to the connecting flanges 1-2-4 at both ends of the heating tube body 1-2. Waste heat recovery pipeline 1-6 is connected to water outlet connector 1-7 and waste heat recovery connector 1-8 respectively. The water for injection in water outlet connector 1-7 flows into waste heat recovery connector 1-8 through waste heat recovery pipeline 1-6.

[0039] The water outlet connector 1-7 includes a water outlet flange 1-16 and a water outlet regulating valve 1-17. The water outlet regulating valve 1-17 is installed on the heating tube body 1-2 through the water outlet flange 1-16. The water outlet regulating valve 1-17 controls the flow rate of the water for injection in the heating tube body 1-2, thereby ensuring that the temperature of the water for injection after being heated by the heat exchanger 1 is greater than 70℃. A heat recovery outlet pipe 1-18 is provided on the side wall of the water outlet flange 1-16. The heat recovery outlet pipe 1-18 is connected to the inlet chamber 1-12. In order to facilitate the control of heat recovery of the heat exchanger 1, a control valve is provided on the pipeline connecting the heat recovery outlet pipe 1-18 and the inlet chamber 1-12 to control the flow of heat recovery.

[0040] A temperature sensor 1-19 is installed inside the outlet flange 1-16 of the outlet connector 1-7. The temperature sensor 1-19 is connected to the outlet regulating valve 1-17. The outlet regulating valve 1-17 is opened and closed according to the temperature detected by the temperature sensor 1-19, thereby changing the liquid flow rate in the heat exchanger 1.

[0041] The waste heat recovery connector 1-8 includes a connector sleeve 1-20 and a heat exchange pipe 1-21. The connector sleeve 1-20 is connected to the heating tube 1-2. The heat exchange pipe 1-21 is installed inside the connector sleeve 1-20 and connected to the waste heat recovery pipeline 1-6. The heat exchange pipe 1-21 is spiral-shaped. The hot water heated by the waste heat recovery pipeline 1-6 flows into the heat exchange pipe 1-21 and exchanges heat with the water for injection in the connector sleeve 1-20, thereby increasing the temperature of the water for injection in the connector sleeve 1-20. The water for injection in the connector sleeve 1-20 flows back to the storage tank 2 after heat exchange. Since the volume of the storage tank 2 is large, and the flow rate of the heat exchange pipe 1-21 per unit time is negligible relative to the volume of the storage tank 2, the water for injection flowing into the storage tank through the heat exchange pipe 1-21 will not have a significant impact on the water temperature in the storage tank 2.

[0042] The heat exchange pipe 1-21 has a spiral structure and is located at the center of the connector sleeve 1-20. This increases the temperature of the injection water in the middle of the connector sleeve 1-20, thereby making the initial injection temperature of the liquid entering the middle liquid flow pipe 1-1 higher than the initial injection temperature of the liquid entering the circumferential liquid flow pipe 1-1.

[0043] A water-for-injection circulation system includes a storage tank 2, a delivery pump 3, a water connector 4, and an electromagnetic heating heat exchanger connected in sequence. The electromagnetic heating heat exchanger 1 is connected to the storage tank 2 to form a water-for-injection circulation loop. The water for injection flows into the storage tank 2 sequentially through the waste heat recovery connector 1-8, the heat exchanger 1, and the water outlet connector 1-7. The heat exchange pipe 1-21 in the electromagnetic heating heat exchanger is connected to the storage tank 2 to guide the liquid after heat recovery treatment into the storage tank 2.

[0044] The working principle of this heat exchanger is as follows: When the temperature sensor 1-19 detects that the water temperature is low, the liquid flow rate in the heat exchanger 1 is reduced through the outlet regulating valve 1-17. With the working efficiency of the delivery pump 3 being constant, the flow rate of the injection water flowing into the waste heat recovery pipeline 1-6 becomes faster. At the same time, due to the small diameter of the waste heat recovery pipeline 1-6, the injection water in the waste heat recovery pipeline 1-6 is rapidly heated and flows into the waste heat recovery connector 1-8, where it exchanges heat with the injection water in the waste heat recovery connector 1-8, thereby increasing the water temperature flowing into the heat exchanger 1. After the initial heating, the injection water flowing into the heat exchanger 1 can reach a temperature of over 70°C more quickly, thus rapidly heating the water temperature through the heat exchanger 1 and improving the efficiency of the heat exchanger 1.

[0045] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention; therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0046] Although this document makes extensive use of terms corresponding to the figure labels, the possibility of using other terms is not excluded; these terms are used merely to more conveniently describe and explain the essence of the invention; interpreting them as any kind of additional limitation would be contrary to the spirit of the invention.

Claims

1. A sanitary electromagnetic heating heat exchanger, characterized in that, The device includes a heat exchanger (1), which includes multiple liquid flow pipes (1-1), a heating tube (1-2), and an electromagnetic coil (1-4). The multiple liquid flow pipes (1-1) are arranged inside the heating tube (1-2), and the electromagnetic coil (1-4) is arranged outside the heating tube (1-2). A heat-conducting medium is filled between the heating tube (1-2) and the liquid flow pipes (1-1). The heating tube (1-2) is triggered to heat up by the electromagnetic coil (1-4) to increase the liquid temperature in the liquid flow pipes (1-1). Heat-conducting fins are provided inside the heating tube (1-2), and a waste heat recovery mechanism for accelerating liquid heating is arranged outside the heating tube (1-2). The waste heat recovery mechanism is adapted to the heat-conducting fins. The waste heat recovery mechanism includes a waste heat recovery pipeline (1-6) and an outlet connector (1-7) and a waste heat recovery connector (1-8) respectively connected to both ends of the heat exchanger (1). The waste heat recovery pipeline (1-6) is connected to the outlet connector (1-7) and the waste heat recovery connector (1-8) respectively. The waste heat recovery pipeline (1-6) is arranged between the heating tube body (1-2) and the heat insulation layer (1-3). The water outlet connector (1-7) includes a water outlet regulating valve (1-17). When the liquid flow rate delivered to the heat exchanger (1) is constant, the liquid flow rate in the heat exchanger (1) is reduced by the water outlet regulating valve (1-17), and the injection water flowing into the waste heat recovery pipeline (1-6) becomes faster. After the injection water in the waste heat recovery pipeline (1-6) is heated, it flows into the waste heat recovery connector (1-8) and exchanges heat with the injection water in the waste heat recovery connector (1-8) to increase the water temperature flowing into the heat exchanger (1).

2. The sanitary electromagnetic heating heat exchanger according to claim 1, characterized in that, The outer wall of the heating tube (1-2) is provided with a waste heat recovery groove (1-9), and the waste heat recovery pipeline (1-6) is arranged in the waste heat recovery groove (1-9).

3. The sanitary electromagnetic heating heat exchanger according to claim 2, characterized in that, The heating tube body (1-2) is connected to a finned unit (1-10). Adjacent finned units (1-10) are joined together to form a heat-conducting fin (1-11). The heat-conducting fin (1-11) is positioned facing the liquid flow pipe (1-1). A waste heat recovery groove (1-9) is formed between adjacent heat-conducting fins (1-11).

4. The sanitary electromagnetic heating heat exchanger according to claim 3, characterized in that, The heating tube (1-2) has an inlet chamber (1-12) and an outlet chamber (1-13) at its two ends. The inlet chamber (1-12) and the outlet chamber (1-13) are connected by a waste heat recovery pipeline (1-6). The inlet chamber (1-12) is connected to the water outlet connector (1-7), and the outlet chamber (1-13) is connected to the waste heat recovery connector (1-8).

5. The sanitary electromagnetic heating heat exchanger according to claim 3, characterized in that, The fin unit (1-10) includes an inclined portion (1-14) and a heat-conducting portion (1-15). When adjacent fin units (1-10) are assembled, a waste heat recovery groove (1-9) is formed between adjacent inclined portions (1-14), and the heat-conducting portion (1-15) forms a heat-conducting straight plate.

6. The sanitary electromagnetic heating heat exchanger according to claim 1, characterized in that, The water outlet connector (1-7) includes a water outlet flange (1-16) and a water outlet regulating valve (1-17). The water outlet regulating valve (1-17) is installed on the heating tube body (1-2) through the water outlet flange (1-16). A heat recovery liquid outlet pipe (1-18) is provided on the side wall of the water outlet flange (1-16). The heat recovery liquid outlet pipe (1-18) is connected to the waste heat recovery pipeline (1-6).

7. The sanitary electromagnetic heating heat exchanger according to claim 1, characterized in that, A temperature sensor (1-19) is installed inside the water outlet connector (1-7), and the temperature sensor (1-19) is connected to the water outlet regulating valve (1-17).

8. The sanitary electromagnetic heating heat exchanger according to claim 1, characterized in that, The waste heat recovery connector (1-8) includes a connector sleeve (1-20) and a heat exchange pipe (1-21). The connector sleeve (1-20) is connected to the heating tube (1-2), and the heat exchange pipe (1-21) is installed inside the connector sleeve (1-20) and connected to the waste heat recovery pipe (1-6).

9. A water circulation system for a pharmaceutical workshop, characterized in that, The device includes a storage tank (2), a delivery pump (3), a water connector (4), and a sanitary electromagnetic heating heat exchanger as described in any one of claims 1-8, which are connected in sequence. The electromagnetic heating heat exchanger is connected to the storage tank (2) to form a water-injection circulation loop. The heat exchange pipes (1-21) in the electromagnetic heating heat exchanger are connected to the storage tank (2) to guide the liquid after heat recovery treatment into the storage tank (2).

Images