A water treatment apparatus

Abstract

The application relates to the technical field of water treatment equipment, in particular to a water treatment equipment which comprises a heat tank assembly and a waterway system, the heat tank assembly comprises a tank body provided with a medium cavity and a heater in heat conduction connection with heat exchange medium in the medium cavity; the waterway system comprises a medium passage, a water passage, a pressure relief passage in communication with the medium cavity and a recovery passage in communication with the pressure relief passage, the medium passage comprises a medium input waterway, a medium heat exchange waterway and a medium return waterway connected in sequence, the water passage comprises an inlet waterway, a heating waterway and an outlet waterway connected in sequence, the medium heat exchange waterway is in heat conduction connection with the heating waterway; wherein the recovery passage is in heat conduction connection with at least one of the medium input waterway, the medium heat exchange waterway, the inlet waterway, the heating waterway and the outlet waterway. The high-temperature steam discharged by pressure relief of the medium cavity can be effectively utilized, and the material utilization rate and the energy utilization rate of the water treatment equipment are improved.

Description

Technical Field

[0001] This application relates to the field of water treatment equipment technology, specifically to a water treatment device. Background Technology

[0002] With the advancement of technology, people have developed diverse needs for domestic water. Water treatment equipment can treat the input water, such as adjusting its temperature and quality to meet user requirements, before discharging the treated water to users, greatly facilitating their lives. Water treatment equipment typically includes a tank and a heater. The tank contains a medium cavity for storing water and other media, while the heater heats the heat exchange medium within the medium cavity. As the heating process proceeds, the temperature of the heat exchange medium gradually increases, and the pressure within the medium cavity also increases. Therefore, an venting channel connecting the heat pipe to the medium cavity is needed to release gas and relieve pressure in case of excessive pressure, preventing damage to the heat exchange tank and water system due to excessive pressure.

[0003] However, the high-temperature heat exchange medium steam and its heat are lost during the depressurization process, reducing the material and energy utilization rates of the water treatment equipment. Utility Model Content

[0004] In view of this, this application provides a water treatment device that can effectively utilize the high-temperature steam discharged from the pressure relief chamber of the medium to improve the material utilization rate and energy utilization rate of the water treatment device.

[0005] To solve the above-mentioned technical problems, one technical solution adopted in this application is: to provide a water treatment device, including a hot tank assembly and a water circuit system. The hot tank assembly includes a tank body with a medium cavity and a heater that is thermally connected to the heat exchange medium in the medium cavity. The water circuit system includes a medium passage, a water passage, a pressure relief passage connecting to the medium cavity, and a recovery passage connecting to the pressure relief passage. The medium passage includes a medium input water passage, a medium heat exchange water passage, and a medium return water passage connected in sequence. The water passage includes an inlet water passage, a heating water passage, and an outlet water passage connected in sequence. The medium heat exchange water passage is thermally connected to the heating water passage. The recovery passage is thermally connected to at least one of the medium input water passage, the medium heat exchange water passage, the inlet water passage, the heating water passage, and the outlet water passage.

[0006] In one specific embodiment, the water treatment equipment includes a heat exchanger assembly, wherein the recovery passage, the heating water passage, and the medium heat exchange water passage are disposed within the heat exchanger assembly, and the recovery passage is thermally connected to at least one of the heating water passage and the medium heat exchange water passage.

[0007] In one specific embodiment, the heat exchanger assembly includes a first heat exchanger and a second heat exchanger, the heating water circuit includes a first-stage heating circuit and a second-stage heating circuit connected in sequence, the first-stage heating circuit being located inside the first heat exchanger and the second-stage heating circuit being located inside the second heat exchanger; the medium hot water circuit is disposed inside the second heat exchanger, the second-stage heating circuit being thermally connected to the medium hot water circuit, and the recovery passage is disposed inside the first heat exchanger, the recovery passage being thermally connected to the first-stage heating circuit.

[0008] In one specific embodiment, the water system further includes a condensation return path, one end of which is connected to the recovery path and the other end is connected to the medium cavity.

[0009] In one specific embodiment, the tank body is provided with a reflux port, which is located at the bottom of the medium cavity and is connected to the condensation reflux path.

[0010] In one specific embodiment, the water system further includes a medium discharge passage, one end of which is connected to the recycling passage and the other end is used for waste discharge.

[0011] In one specific embodiment, the water treatment equipment further includes a thick film instant heating element, which is connected to the outlet water path. The recovery path is thermally connected to at least one of the inlet water path, the heating water path, and the outlet water path upstream of the thick film instant heating element.

[0012] In one specific embodiment, the end of the recovery passage away from the pressure relief passage is used to connect to an external heating pipeline.

[0013] In one specific embodiment, the water treatment equipment is further provided with an external return flow path, one end of which is used to connect to the end of the external heat pipe away from the recovery path, and the other end is used to connect to the bottom of the medium cavity.

[0014] In one specific embodiment, the water system further includes a water inlet passage, one end of which is used for water inlet and the other end of which is connected to the medium input water passage and / or the water inlet passage. The recycling passage is also connected to the end of the water inlet passage used for water inlet.

[0015] The beneficial effects of this application include: by setting up a recovery channel, a portion of the heat exchange medium steam that was originally to be discharged in the pressure relief channel is returned to the water system, and the recovery channel is used to allow this portion of heat exchange medium steam to exchange heat with at least one of the medium input water channel, medium heat exchange water channel, inlet water channel, heating water channel, and outlet water channel, thereby using the heat exchange medium steam to heat the heat exchange medium or water in these channels, and the heat in the heat exchange medium steam can be reused, thereby reducing the energy loss caused by the pressure relief process and improving the energy utilization rate of the water treatment equipment. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the implementation will be briefly introduced below. Obviously, the drawings described below are some implementations of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the assembly structure of an embodiment of the water treatment equipment of this application; Figure 2 This is a schematic block diagram of the water circuit structure of the first embodiment of the water treatment equipment of this application; Figure 3 This is a schematic block diagram of the water circuit structure of the second embodiment of the water treatment equipment of this application; Figure 4 This is a schematic block diagram of the water circuit structure of the third embodiment of the water treatment equipment of this application; Figure 5 This is a schematic block diagram of the water circuit structure of the fourth embodiment of the water treatment equipment of this application; Figure 6 This is a schematic block diagram of the water circuit structure of the fifth embodiment of the water treatment equipment of this application.

[0018] Explanation of reference numerals in the attached figures: 1. Water treatment equipment; 21. Tank; 22. Medium cavity; 23. Return port; 3. Water system; 31. Medium passage; 311. Medium input water passage; 312. Medium heat exchange water passage; 313. Medium return water passage; 32. Water passage; 321. Inlet water passage; 322. Heating water passage; 322a. First stage heating passage; 322b. Second stage heating passage; 323. Outlet water passage; 33. Pressure relief passage; 34. Recovery passage; 35. Condensate return passage; 36. Medium discharge passage; 37. External return passage; 38. Inlet water passage; 4. Heat exchanger assembly; 41. First heat exchanger; 42. Second heat exchanger; 5. Thick film instantaneous heating element; 6. External heat supply piping. Detailed Implementation

[0019] In this application, the terms "set up," "equipped with," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0020] The terms “center,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0022] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0023] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0024] With the advancement of technology, people have developed diverse needs for domestic water. Water treatment equipment can treat the input water, such as adjusting its temperature and quality to meet user requirements, before discharging the treated water to users, greatly facilitating their lives. Water treatment equipment typically includes a tank and a heater. The tank contains a medium cavity for storing water and other media, while the heater heats the heat exchange medium within the medium cavity. As the heating process proceeds, the temperature of the heat exchange medium gradually increases, and the pressure within the medium cavity also increases. Therefore, an venting channel connecting the heat pipe to the medium cavity is needed to release gas and relieve pressure in case of excessive pressure, preventing damage to the heat exchange tank and water system due to excessive pressure.

[0025] However, the high-temperature heat exchange medium steam and its heat are lost during the depressurization process, reducing the material and energy utilization rates of the water treatment equipment.

[0026] In order to improve or solve the above technical problems, the inventors of this application, after long-term research, have proposed at least the following embodiments.

[0027] See Figures 1-6 , Figure 1 This is a schematic diagram of the assembly structure of an embodiment of the water treatment equipment of this application. Figure 2 This is a schematic block diagram of the water circuit structure of the first embodiment of the water treatment equipment of this application. Figure 3 This is a schematic block diagram of the water circuit structure of the second embodiment of the water treatment equipment of this application. Figure 4 This is a schematic block diagram of the water circuit structure of the third embodiment of the water treatment equipment of this application. Figure 5 This is a schematic block diagram of the water circuit structure of the fourth embodiment of the water treatment equipment of this application. Figure 6 This is a schematic block diagram of the water circuit structure of the fifth embodiment of the water treatment equipment of this application. Specific embodiments of this application provide a water treatment equipment 1, including a heat tank assembly and a water circuit system 3.

[0028] The hot tank assembly includes a tank body 21 with a medium cavity 22 and a heater that is thermally connected to the heat exchange medium within the medium cavity 22. The water system 3 includes a medium passage 31, a water passage 32, a pressure relief passage 33 connecting to the medium cavity 22, and a recovery passage 34 connecting to the pressure relief passage 33. The medium passage 31 includes a medium input water passage 311, a medium heat exchange water passage 312, and a medium return water passage 313 connected in sequence. The water passage 32 includes an inlet water passage 321, a heating water passage 322, and an outlet water passage 323 connected in sequence. The medium heat exchange water passage 312 is thermally connected to the heating water passage 322. The recovery passage 34 is thermally connected to at least one of the medium input water passage 311, the medium heat exchange water passage 312, the inlet water passage 321, the heating water passage 322, and the outlet water passage 323.

[0029] Water treatment equipment 1 refers to a device capable of heating, filtering, softening, and other treatments on input water before outputting it. For example, water treatment equipment 1 can be an instant hot water dispenser, a water purifier and heater integrated unit, a commercial water heater, or a water purifier with a heating function. The heating tank assembly is the core heating module of water treatment equipment 1, functioning similarly to a boiler. It stores heat through an internal heat exchange medium, thereby indirectly heating the water in water passage 32. The medium cavity 22 is the space inside the tank 21 used to contain the heat exchange medium. The water system 3 is the collective term for the network of pipes through which all water and heat exchange medium flow within water treatment equipment 1; it is the piping system that realizes various heating, heat exchange, and recovery functions.

[0030] Medium passage 31 is a dedicated circulation pipeline for the heat exchange medium, enabling it to circulate within the water treatment equipment 1. Medium inlet water passage 311 is the pipeline that outputs the higher-temperature heat exchange medium from the medium container 22. Medium heat exchange water passage 312 is the pipeline through which the higher-temperature heat exchange medium undergoes heat exchange with the water. Medium return water passage 313 is the pipeline that returns the lower-temperature heat exchange medium after heat exchange to the medium container 22 for reheating.

[0031] Water passage 32 is a dedicated pipeline for water flow, from the input of low-temperature water to the final output of hot water. Inlet water passage 321 is the pipeline that inputs low-temperature water from sources such as water tanks, water pipes, and pre-treatment equipment 1. Heating water passage 322 is the pipeline section where the water is heated through heat exchange with the heat exchange medium. Outlet water passage 323 is the pipeline that delivers the finally heated water to faucets and other water outlet channels.

[0032] The pressure relief passage 33 acts as a safety valve for the medium cavity 22 and is normally disconnected. When the pressure and temperature inside the medium cavity 22 become excessively high due to heating, the pressure relief passage 33 can be automatically or manually connected to discharge some of the high-temperature heat exchange medium steam, preventing the tank 21 from exploding. The recovery passage 34 is connected to the pressure relief passage 33 and is used to guide the high-temperature steam that would otherwise be wasted and discharged to the outside to exchange heat with water or the heat exchange medium, thereby recovering the heat from the high-temperature heat exchange medium steam discharged during the pressure relief process.

[0033] In the specific embodiment of this application, by setting up a recovery passage 34, part of the heat exchange medium steam that was originally to be discharged in the pressure relief passage 33 is returned to the water system 3. The recovery passage 34 is used to allow this part of the heat exchange medium steam to exchange heat with at least one of the medium input water passage 311, medium heat exchange water passage 312, water inlet passage 321, heating water passage 322, and water outlet passage 323. In this way, the heat exchange medium steam is used to heat the heat exchange medium or water in these passages, and the heat in the heat exchange medium steam can be reused, thereby reducing the energy loss caused by the pressure relief process and improving the energy utilization rate of the water treatment equipment 1.

[0034] See Figure 2 , Figure 3 , Figure 4 In one specific embodiment of this application, the water treatment equipment 1 includes a heat exchanger assembly 4, the recovery passage 34, the heating water passage 322, and the medium heat exchange water passage 312 are disposed in the heat exchanger assembly 4, and the recovery passage 34 is thermally connected to at least one of the heating water passage 322 and the medium heat exchange water passage 312.

[0035] Among them, the heat exchanger assembly 4 is a device for realizing heat exchange between water and heat exchange medium. It has an isolated heating water circuit 322 and a medium heat exchange water circuit 312, which can make the heat exchange medium with a higher temperature and the water with a lower temperature tightly connected under isolated conditions to transfer heat.

[0036] In the specific embodiment of this application, the recovery passage 34, the heating water passage 322, and the medium heat exchange passage 312 are integrated into the heat exchanger assembly 4. Heat exchange is achieved by utilizing the heat exchange medium steam in the recovery passage 34 to exchange heat with the water in the heating water passage 322 and / or the heat exchange medium in the medium heat exchange passage 312, maximizing heat utilization at the most critical locations. Furthermore, integrating these three functionally different passages into a single heat exchanger assembly 4 greatly simplifies the piping design of the water system 3, facilitates a more compact design of the water treatment equipment 1, and improves the assembly and maintenance efficiency of the water treatment equipment 1.

[0037] like Figure 4As shown in a specific embodiment of this application, the heat exchanger assembly 4 includes a first heat exchanger 41 and a second heat exchanger 42. The heating water path 322 includes a first-stage heating path 322a and a second-stage heating path 322b connected in sequence. The first-stage heating path 322a is located within the first heat exchanger 41, and the second-stage heating path 322b is located within the second heat exchanger 42. The medium heat exchange water path 312 is disposed within the second heat exchanger 42, and the second-stage heating path 322b is thermally connected to the medium heat exchange water path 312. The recovery path 34 is disposed within the first heat exchanger 41, and the recovery path 34 is thermally connected to the first-stage heating path 322a.

[0038] The first-stage heating circuit 322a is a pipeline where water exchanges heat with the heat exchange medium steam, thereby utilizing the waste heat from the steam heat exchange for preheating. The second-stage heating circuit 322b is a pipeline where water exchanges heat with a high-temperature heat exchange medium, thereby being heated by the high-temperature heat exchange medium.

[0039] Since the depressurization process is not continuous, the recovery passage 34 does not always contain high-temperature heat exchange medium steam. Therefore, the heating effect of the recovery passage 34 on the water or heat exchange medium is unstable and inefficient. That is, the heat exchange medium steam is of lower quality than the heat exchange medium in the medium heat exchange water passage 312, making it difficult to significantly raise the temperature of the water or heat exchange medium. In the specific embodiment of this application, the heat exchanger assembly 4 is divided into a first heat exchanger 41 and a second heat exchanger 42. The recovery passage 34 is set in the first heat exchanger 41, using low-grade heat exchange medium steam to preheat the water in the first-stage heating passage 322a. The medium heat exchange water passage 312 is set in the second heat exchanger 42, using high-grade heat exchange medium to formally heat the water in the second-stage heating passage 322b. This ensures the heating effect of the water while effectively recovering and utilizing the heat from the depressurized heat exchange medium steam.

[0040] See Figure 2 , Figure 4 In one specific embodiment of this application, the water system 3 further includes a condensation return path 35, one end of which is connected to the recovery path 34 and the other end is connected to the medium cavity 22.

[0041] The condensation return path 35 is the return route of the heat exchange medium vapor after flowing through the recovery path 34. When the high-temperature heat exchange medium vapor releases heat in the recovery path 34, it will condense into liquid. The condensation return path 35 is responsible for sending these liquid heat exchange media back to the tube body, thereby completing the recovery of the heat exchange medium.

[0042] In the specific embodiment of this application, by setting up a condensation return path 35, after recovering and reusing the energy in the heat exchange medium steam, this part of the heat exchange medium can also be returned to the medium cavity 22 through the condensation return path 35, realizing the recovery of the heat exchange medium and the heat carried therein, thereby improving the energy utilization rate of the water treatment equipment 1 and the material utilization rate of the water treatment equipment 1.

[0043] like Figure 2 , Figure 4 As shown in a specific embodiment of this application, the tank 21 is provided with a reflux interface 23, which is located at the bottom of the medium cavity 22 and is connected to the condensation reflux path 35. The reflux interface 23 refers to the interface located at the bottom of the medium cavity 22, used to connect to the condensation reflux path 35, allowing the condensed liquid medium to flow smoothly and steadily back to the bottom of the medium cavity 22, avoiding any impact on the temperature of the heat exchange medium at the top of the medium cavity 22.

[0044] Specifically, since the heat exchange medium steam in the recovery passage 34 has undergone heat exchange and condensation reflux processes, a large amount of heat is lost, and the temperature of this part of the heat exchange medium drops significantly. In the medium cavity 22, the high-temperature heat exchange medium has a lower density and is therefore located in the upper layer, while the low-temperature heat exchange medium has a higher density and is located in the lower layer.

[0045] In the specific embodiment of this application, by setting the return port 23 at the bottom of the medium cavity 22, the lower temperature portion of the heat exchange medium in the condensation return path 35 enters the lower layer of the medium cavity 22, thus avoiding impact on the upper high temperature heat exchange medium and keeping the temperature of the upper high temperature heat exchange medium stable. This ensures the effect of heating the water using the high temperature heat exchange medium, and while recovering energy and materials from the heat exchange medium, makes the performance of the water treatment equipment 1 more stable.

[0046] See Figure 3 In a specific embodiment of this application, the water system 3 further includes a medium discharge passage 36, one end of which is connected to the recycling passage 34 and the other end is used for waste discharge.

[0047] In the specific embodiment of this application, after the heat in the heat exchange medium is recovered using the recovery passage 34, the heat exchange medium with a significantly reduced temperature can also be directly discharged to the outside through the medium discharge passage 36, thereby effectively and thoroughly releasing the pressure in the medium cavity 22 to the outside and realizing a complete pressure relief process.

[0048] See Figure 2 , Figure 3 , Figure 4In one specific embodiment of this application, the water treatment device 1 further includes a thick film instant heating element 5, which is connected to the outlet water passage 323. The recovery passage 34 is thermally connected to at least one of the inlet water passage 321, the heating water passage 322, and the outlet water passage 323 upstream of the thick film instant heating element 5.

[0049] Among them, the thick film instant heating element 5 is an instant heating device. By spraying a thick film resistor on the pipe through which the water flows, high heat is generated instantly after being energized, which can quickly and accurately heat the water flowing through it.

[0050] In the specific embodiment of this application, in addition to using the heat from the heat exchange medium in the recovery path 34 and the medium heat exchange path to heat the water, a thick film instant heating element 5 is added to further heat the water. Based on the existing efficient waste heat recovery, the highest quality electrical energy is introduced to provide the ability to precisely control and instantaneously compensate for the final temperature of the water, maximizing the preheating value of waste heat, thereby ensuring that the water can be quickly, accurately and stably raised to the required temperature, and further reducing the overall energy consumption of the water treatment equipment 1.

[0051] like Figure 5 As shown in a specific embodiment of this application, the end of the recovery passage 34 away from the pressure relief passage 33 is used to connect to the external heating pipe 6.

[0052] In the specific embodiment of this application, in addition to using the heat exchange medium steam in the recovery passage 34 to heat the water and / or heat exchange medium inside the water treatment equipment 1, this part of the heat exchange medium steam can also be input into the external heat-using equipment to release heat and pressure to the external heat-using equipment, thereby making full use of the high pressure and high temperature characteristics of this part of the heat exchange medium steam and improving the energy utilization rate of the water treatment equipment 1.

[0053] See Figure 5 In a specific embodiment of this application, the water treatment equipment 1 is further provided with an external return flow path 37, one end of which is used to connect to the end of the external heating pipe 6 away from the recovery passage 34, and the other end is used to connect to the bottom of the medium cavity 22.

[0054] In the specific embodiment of this application, by setting an external return flow path 37, the heat exchange medium that has released energy in the external heat-using equipment is returned to the bottom of the medium cavity 22. This can prevent the high-temperature heat exchange medium on the upper layer of the medium cavity 22 from being impacted, and keep the temperature of the high-temperature heat exchange medium on the upper layer stable. This ensures the effect of heating the water with the high-temperature heat exchange medium. At the same time, energy and material recovery can be performed on the heat exchange medium returning from the external heat-using equipment, which can make the performance of the water treatment equipment 1 more stable and improve the energy utilization rate of the water treatment equipment 1.

[0055] See Figure 6 In a specific embodiment of this application, the water system 3 further includes a water inlet passage 38, one end of which is used for water inlet and the other end is connected to the medium input water passage 311 and / or the water inlet water passage 321. The recovery passage 34 is also connected to the end of the water inlet passage 38 used for water inlet.

[0056] In the specific embodiment of this application, by connecting the recovery passage 34 to the end of the water inlet passage 38 for water inlet, high-temperature heat exchange medium steam can be used to sterilize the passages in the water system 3, such as the water inlet passage 38 and the subsequent water inlet passage 321. After sterilization, the cooled heat exchange medium can be returned to the water inlet passage 321 or the medium cavity 22. Thus, while recovering energy and materials from the depressurized heat exchange medium steam, the hygienic performance of the water system 3 is improved, thereby improving the cleanliness, safety, material utilization rate and energy utilization rate of the water treatment equipment 1.

[0057] In this application, the terms "embodiment" and "implementation" mean that a specific feature, part, or characteristic described in connection with an embodiment can be included in at least one embodiment of this application. The appearance of these phrases in various places in the specification does not necessarily refer to the same embodiment, nor are they independent or alternative embodiments mutually exclusive with other embodiments. Those skilled in the art will understand, explicitly and implicitly, that the embodiments described in this application can be combined with other embodiments. Furthermore, it should be understood that the features, parts, or characteristics described in the various embodiments of this application can be arbitrarily combined to form another embodiment that does not depart from the spirit and scope of the technical solution of this application, provided there is no contradiction between them.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of this application should not depart from the spirit and scope of the technical solutions of this application.

Claims

1. A water treatment device, characterized in that, include: The hot tank assembly includes a tank body (21) having a medium cavity (22) and a heater that is thermally connected to the heat exchange medium in the medium cavity (22); The water system (3) includes a medium passage (31), a water passage (32), a pressure relief passage (33) connecting the medium cavity (22), and a recovery passage (34) connecting the pressure relief passage (33). The medium passage (31) includes a medium input water passage (311), a medium heat exchange water passage (312), and a medium return water passage (313) connected in sequence. The water passage (32) includes an inlet water passage (321), a heating water passage (322), and an outlet water passage (323) connected in sequence. The medium heat exchange water passage (312) and the heating water passage (322) are thermally connected. The recovery passage (34) is thermally connected to at least one of the medium input water passage (311), the medium heat exchange water passage (312), the water inlet passage (321), the heating water passage (322), and the water outlet passage (323).

2. The water treatment equipment according to claim 1, characterized in that, The water treatment equipment (1) includes a heat exchanger assembly (4), the recovery passage (34), the heating water passage (322), and the medium heat exchange water passage (312) are disposed in the heat exchanger assembly (4), and the recovery passage (34) is thermally connected to at least one of the heating water passage (322) and the medium heat exchange water passage (312).

3. The water treatment equipment according to claim 2, characterized in that, The heat exchanger assembly (4) includes a first heat exchanger (41) and a second heat exchanger (42). The heating water path (322) includes a first-stage heating path (322a) and a second-stage heating path (322b) connected in sequence. The first-stage heating path (322a) is located inside the first heat exchanger (41), and the second-stage heating path (322b) is located inside the second heat exchanger (42). The medium heat exchange path (312) is located inside the second heat exchanger (42), the second stage heating path (322b) is thermally connected to the medium heat exchange path (312), the recovery path (34) is located inside the first heat exchanger (41), and the recovery path (34) is thermally connected to the first stage heating path (322a).

4. The water treatment equipment according to claim 1, characterized in that, The water system (3) also includes a condensation return path (35), one end of which is connected to the recovery path (34) and the other end is connected to the medium cavity (22).

5. The water treatment equipment according to claim 4, characterized in that, The tank (21) is provided with a reflux port (23), which is located at the bottom of the medium cavity (22) and is connected to the condensation reflux path (35).

6. The water treatment equipment according to claim 1, characterized in that, The water system (3) also includes a medium discharge passage (36), one end of which is connected to the recycling passage (34) and the other end is used for waste discharge.

7. The water treatment equipment according to claim 1, characterized in that, The water treatment equipment (1) further includes a thick film instant heating element (5), which is connected to the outlet water path (323). The recovery path (34) is thermally connected to at least one of the inlet water path (321), the heating water path (322), and the outlet water path (323) upstream of the thick film instant heating element (5).

8. The water treatment equipment according to claim 1, characterized in that, The end of the recovery passage (34) away from the pressure relief passage (33) is used to connect to an external heating pipe (6).

9. The water treatment equipment according to claim 8, characterized in that, The water treatment equipment (1) is also provided with an external return flow path (37), one end of which is used to connect the external heat pipe (6) away from the recovery passage (34), and the other end is used to connect the bottom of the medium cavity (22).

10. The water treatment equipment according to claim 1, characterized in that, The water system (3) further includes a water inlet passage (38), one end of which is used for water inlet and the other end is connected to the medium input water passage (311) and / or the water inlet water passage (321). The recovery passage (34) is also connected to the end of the water inlet passage (38) used for water inlet.

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