Soft water heater

Abstract

The utility model discloses a soft water heater, which comprises a main body part, a water inlet part and a water outlet part, the main body part comprises a hot water component for heating water and a soft water component for softening water, and the soft water component is communicated with the hot water component; the salt box assembly is detachably arranged at the bottom of the main body part and communicates with the water softening assembly; the salt box assembly comprises a box body, a salt valve cavity and at least one salt box cavity are formed in the box body in the first direction, and an opening is formed in the side face, parallel to the first direction, of the salt box cavity; the salt boxes are arranged to be matched with the salt box cavities, and the salt boxes are detachably installed in the corresponding salt box cavities through the openings; the water path plate is arranged on the side, away from the opening, of the box body, and the interior of the water path plate is of a communicating structure and correspondingly communicates with the salt valve cavity and the salt box in the at least one salt box cavity. The quick installation of the salt valve cavity and the plurality of salt boxes is realized through a simple integrated water path structure, and the production and assembly difficulty is greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to water treatment equipment technical field especially relates to a soft water water heater. BACKGROUND

[0002] The water heater is a device that makes cold water temperature rise to become hot water in a certain time through various physical principles, and can be divided into electric water heater, gas water heater, solar water heater and the like according to different principles.At present, with the improvement of people's living standards, people's requirements for daily water are also getting higher and higher, and water quality is uneven all over the country due to factors such as region, and the difference of water quality resources is relatively large, and the water quality in most areas is hard, so long-term use of high-hardness water can make people's skin dry, rough and age quickly, so people's demand for soft water is rising.Soft water does not contain or contains less soluble calcium and magnesium compounds, and the use of soft water can effectively inhibit fungi, delay skin aging and prevent water from scaling after heating, which is harmless to life.

[0003] Therefore, a soft water water heater integrating a soft water assembly and a water heater assembly appears in the market, and the soft water assembly in the soft water water heater is provided with a salt tank to reactivate soft water resin.A salt tank assembly and a hot water equipment are disclosed in publication No.CN213362856U, the salt core is provided with a first interface with a first water stop structure, the frame body has a second interface with a second water stop structure, the first interface and the second interface are connected, and the first water stop structure and the second water stop structure are opened to connect the salt core and the water flow channel, and the first interface and the second interface are separated, and the first water stop structure and the second water stop structure are closed.The first interface includes a connecting joint into the salt core, the frame body has a front wall plate, the front wall plate is located between the two salt core chambers, the second interface includes an embedding groove arranged on the front wall plate for embedding the connecting joint, and when the salt core is assembled to the frame body, the connecting joint is inserted into the embedding groove in the form of a male joint to realize the communication of the salt core and the water flow channel.

[0004] However, the connection structure of the first interface and the second interface makes the frame body preferably adapt to one or two salt cores, which is not conducive to the setting of multiple salt cores, and the connection structure is complex, greatly increasing the production and assembly difficulty. UTILITY MODEL CONTENTS

[0005] To solve the above-mentioned defects in the prior art, the purpose of the utility model is to provide a soft water water heater, which realizes the rapid installation of the salt valve cavity and the multiple salt boxes through a simple integrated waterway structure, greatly reducing the production and assembly difficulty.

[0006] The utility model provides a soft water water heater, which comprises:

[0007] A main body part includes a hot water assembly for heating water and a soft water assembly for softening water, the soft water assembly being in communication with the hot water assembly;

[0008] A salt tank assembly is detachably provided at the bottom of the main body part and in communication with the soft water assembly;

[0009] The salt tank assembly comprises:

[0010] A tank body is provided with a salt valve cavity and at least one salt box cavity along a first direction, and an opening is provided on a side of the salt box cavity parallel to the first direction;

[0011] A salt box is adapted to the salt box cavity and is detachably installed in the corresponding salt box cavity through the opening;

[0012] A waterway plate is provided on the side of the tank body away from the opening, and the inside of the waterway plate is in a conductive structure and is in communication with the salt box in the salt valve cavity and the at least one salt box cavity.

[0013] As a preferred embodiment, in the utility model, the waterway plate comprises a plate body with an internal conductive structure, a first interface corresponding to the salt valve cavity, and a second interface corresponding to the salt box cavity, the first interface and the second interface are both provided on the plate body and are in communication with the internal conductive structure;

[0014] The side of the salt box away from the opening is provided with a connecting port, the second interface is connected to the corresponding connecting port through the salt box cavity, and the first interface is in communication with the side of the salt valve cavity away from the opening.

[0015] As a preferred embodiment, in the utility model, the side of the tank body away from the opening is provided with a mounting cavity adapted to the waterway plate, the waterway plate is detachably mounted in the mounting cavity, the mounting cavity is in communication with the salt valve cavity and the salt box cavity through a first connecting part and a second connecting part respectively, the first interface extends into the first connecting part to communicate with the salt valve cavity, and the second interface and the connecting port extend into the second connecting part to be connected.

[0016] As a preferred embodiment, in the utility model, a water stop structure is provided between the second interface and the connecting port, the water stop structure is in communication when the second interface is connected to the connecting port, and the water stop structure is closed when the second interface is separated from the connecting port.

[0017] As a preferred embodiment, in the utility model, the water stop structure comprises a first one-way valve provided on the second interface and a second one-way valve provided on the connecting port, the first one-way valve and the second one-way valve are connected and in communication when the second interface is connected to the connecting port, and the first one-way valve and the second one-way valve are disconnected and closed when the second interface is separated from the connecting port.

[0018] As a preferred embodiment, in the utility model, the plate body is detachably fixed in the installation cavity through the clamping structure or the locking structure, the plate body is internally provided with a cavity, and the first interface and the second interface are communicated through the cavity.

[0019] As a preferred embodiment, in the utility model, the plate body is detachably fixed in the installation cavity through the locking piece, the cavity is internally provided with a protection part for the locking piece to pass through, the axial two ends of the protection part extend to the fixed connection plate body, and the side wall of the protection part is spaced apart from the side wall of the plate body.

[0020] As a preferred embodiment, in the utility model, the salt box is provided with a force applying part corresponding to the opening side, and the outer wall of the salt box and the inner wall of the salt box cavity are correspondingly provided with matched connecting structures and / or guiding structures, the connecting structure comprises a buckle structure, and the guiding structure comprises a guide rail or a guide groove.

[0021] As a preferred embodiment, in the utility model, the side part and the bottom part of the box body are provided with protection plates, and the protection plates are detachably connected with the box body through locking pieces and / or buckle structures.

[0022] As a preferred embodiment, in the utility model, the hot water assembly comprises a burner and a heat exchanger, the burner is used for heating the heat exchanger, the heat exchanger is communicated with an external water supply pipe and an external water outlet assembly through a water inlet pipe and a water outlet pipe respectively, so that the water flowing into the heat exchanger through the water inlet pipe is heated and then discharged through the water outlet pipe, and the soft water assembly is arranged on the water inlet pipe or the water outlet pipe.

[0023] The soft water heater provided by the utility model has the following technical effects:

[0024] The salt valve cavity and the salt box cavity are arranged side by side, the waterway plate is installed on the side away from the opening of the salt box cavity, the communication of the salt box in the salt valve cavity and the salt box cavity is realized by using the internal guide structure of the waterway plate, the communication of the salt boxes in the salt valve cavity and the multiple salt box cavities is realized by using the waterway plate of the integrated waterway structure, the limitation of the number of salt box cavities and salt boxes is greatly reduced, the disassembly and assembly of the salt box from the salt box cavity are not affected, the integrated waterway connecting structure is simple, and the production and assembly difficulty is reduced. Therefore, the salt tank assembly is applied to the soft water heater, a corresponding number of salt box cavities, salt boxes and corresponding waterway plates can be adapted according to user requirements, so that the salt box can be conveniently replenished with water or saturated brine is output, the soft water resin in the soft water assembly is effectively activated, the soft water heater can stably output softened hot water, and the use safety of the soft water heater is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a structural schematic view of the salt tank assembly of the utility model;

[0026] Figure 2The utility model discloses a salt tank assembly's exploded view;

[0027] Figure 3 The utility model discloses a waterway board's sectional view;

[0028] Figure 4 The utility model discloses a box body and salt box's assembly drawing;

[0029] Figure 5 The utility model discloses a soft water heater's structure schematic diagram;

[0030] Figure 6 The utility model discloses a soft water heater's exploded view;

[0031] Figure 7 The utility model discloses a soft water heater's waterway structure diagram.

[0032] Signs:

[0033] 1, box body, 11, salt valve cavity, 12, salt box cavity, 121, opening, 13, installation cavity, 14, first connecting portion, 15, second connecting portion, 2, salt box, 21, connecting port, 22, second check valve, 23, force application part, 3, waterway board, 31, board body, 311, cavity, 312, protection part, 32, first interface, 33, second interface, 34, first check valve, 4, connecting structure, 5, guide structure, 6, protection plate, 7, main part, 71, hot water assembly, 711, combustor, 712, heat exchanger, 72, soft water assembly, 73, water inlet pipeline, 74, water outlet pipeline, 8, salt valve. DETAILED DESCRIPTION

[0034] In order to better understand and implement, the technical scheme in the embodiment of the utility model will be clearly and completely described below in combination with the drawings in the embodiment of the utility model.

[0035] In the description of the utility model, it is explained that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs. The terms used in the specification of the utility model are only for the purpose of describing the specific embodiments and are not intended to limit the utility model.

[0037] Referring to Figure 1 , Figure 2 and Figure 4 , the utility model provides a salt tank subassembly, including tank 1, salt box 2 and waterway board 3. Wherein, tank 1 is provided with salt valve cavity 11 and at least one salt box cavity 12 along the first direction, and the side of salt box cavity 12 parallel to the first direction is provided with opening 121. Tank 1 can be integrally formed by injection molding, and salt valve cavity 11 and at least one salt box cavity 12 are arranged side by side or in a row to extend along the first direction, so that Figure 1 As an example, salt valve cavity 11 and salt box cavity 12 can be arranged horizontally in a row, and opening 121 is arranged on the front side or rear side of salt box cavity 12 to facilitate horizontal pulling of the salt box.

[0038] Salt box 2 is arranged in salt box cavity 12, and salt box 2 is detachably mounted in the corresponding salt box cavity 12 through opening 121. Generally, the number of salt box cavities 12 is equal to the number of salt boxes 2, so that each salt box cavity 12 can be detachably arranged with one salt box 2. Of course, the number of salt box cavities 12 can be greater than the number of salt boxes 2, and several salt box cavities 12 can be additionally arranged, and salt boxes 2 can be placed in appropriate salt box cavities 12 according to actual needs, and salt box cavities 12 can be idle for standby. Salt box 2 is detachably mounted in salt box cavity 12 from opening 121, and salt box 2 can be taken out in time to supplement salt when soft water salt in salt box 2 is insufficient.

[0039] Waterway board 3 is arranged on the side of tank 1 away from opening 121, and the inside of waterway board 3 is a through structure and corresponds to the salt box 2 in salt valve cavity 11 and at least one salt box cavity 12. As an example, Figure 1 opening 121 is arranged on the front side or rear side of salt box cavity 12, and waterway board 3 is arranged on the rear side or front side of tank 1 to integrate and quickly connect salt box 2 in salt valve cavity 11 and salt box cavity 12.

[0040] In this way, salt valve cavity 11 and salt box cavity 12 of the salt tank subassembly are arranged side by side, waterway board 3 is mounted on the side away from opening 121 of salt box cavity 12, the inside of waterway board 3 is a through structure to realize the communication of salt box 2 in salt valve cavity 11 and salt box cavity 12, so that waterway board 3 with the integrated waterway structure realizes the communication of salt box 2 in salt valve cavity 11 and multiple salt box cavities 12, greatly reducing the limitation of the number of salt box cavities 12 and salt boxes 2, and not affecting the dismounting of salt box 2 from salt box cavity 12, and the integrated waterway connection structure is simple, which is conducive to reducing the production and assembly difficulty.

[0041] Specifically, the waterway plate 3 comprises a plate body 31 with an internal conductive structure, a first interface 32 corresponding to the salt valve cavity 11, and a second interface 33 corresponding to the salt box cavity 12, the first interface 32 and the second interface 33 are arranged on the plate body 31 and communicate with the internal conductive structure. The bottom of the side away from the outlet 121 of the salt box 2 is provided with a connecting port 21, the second interface 33 is connected to the corresponding connecting port 21 through the salt box cavity 12, and the first interface 32 communicates with the bottom of the side away from the outlet 121 of the salt valve cavity 11.

[0042] The first interface 32 and the second interface 33 are fixed on the plate body 31, the waterway plate 3 can be integrally formed by injection molding, or the plate body 31 with an internal conductive structure can be formed by buckling two separate plates, and the first interface 32 and the second interface 33 are fixed on one of the two separate plates. The structure that the first interface 32 and the second interface 33 of the waterway plate 3 communicate through the internal conductive structure of the plate body 31, in cooperation with the communication of the first interface 32 and the salt valve cavity 11 and the butt joint communication of the second interface 33 and the connecting port 21 of the salt box 2, can realize the communication between the salt valve cavity 11 arranged in the first direction and the salt box 2 in the at least one salt box cavity 12 through the integrated waterway structure of the waterway plate 3.

[0043] It should be noted that the waterway plate 3 is generally arranged at the bottom of one side of the box body 1, so as to facilitate the connection of the waterway plate 3 with the salt valve cavity 11, the salt box cavity 12 and the bottom of the salt box 2, and facilitate the water supplement in the salt box 2 or the output of saturated brine from the salt box 2.

[0044] The box body 1 is provided with a mounting cavity 13 adapted to the waterway plate 3 on the side away from the outlet 121, the waterway plate 3 is detachably mounted in the mounting cavity 13, the mounting cavity 13 communicates with the salt valve cavity 11 and the salt box cavity 12 through the first connecting portion 14 and the second connecting portion 15 respectively, the first interface 32 extends into the first connecting portion 14 to communicate with the salt valve cavity 11, and the second interface 33 and the connecting port 21 extend into the second connecting portion 15 to be connected in butt joint. The mounting cavity 13 is arranged at the lower part of the side away from the outlet 121 of the box body 1, so as to facilitate the connection of the waterway plate 3 with the salt valve cavity 11, the salt box cavity 12 and the bottom of the salt box 2, the arrangement of the first connecting portion 14 and the second connecting portion 15 ensures the sealing of the connection of the waterway plate 3 with the salt valve cavity 11, the salt box cavity 12 and the salt box 2, avoids the occurrence of water leakage, and has a guiding effect, facilitating the assembly of the waterway plate 3 with the salt valve cavity 11, the salt box cavity 12 and the salt box 2.

[0045] The second interface 33 and the connecting port 21 are provided with a water stop structure. When the second interface 33 is connected with the connecting port 21, the water stop structure is open. When the second interface 33 is separated from the connecting port 21, the water stop structure is closed. Since the salt box 2 is detachably arranged in the salt box cavity 12, when the soft water salt in the salt box 2 is insufficient, the salt box 2 needs to be taken out of the salt box cavity 12 to supplement the soft water salt in the salt box 2. The water stop structure can close the water path when the salt box 2 is taken out to avoid water leakage at the connecting port 21 of the salt box 2 and the second interface 33 of the water path plate 3. When the salt box 2 is assembled in the salt box cavity 12 and the second interface 33 is connected with the connecting port 21, the water stop structure can open the water path to ensure the communication between the salt box 2 and the water path plate 3.

[0046] Specifically, the water stop structure includes a first one-way valve 34 arranged at the second interface 33 and a second one-way valve 22 arranged at the connecting port 21. When the second interface 33 is connected with the connecting port 21, the first one-way valve 34 and the second one-way valve 22 are connected and open. When the second interface 33 is separated from the connecting port 21, the first one-way valve 34 and the second one-way valve 22 are disconnected and closed. In this way, when the soft water salt in the salt box 2 is insufficient, the salt box 2 needs to be taken out of the salt box cavity 12 to supplement the soft water salt in the salt box 2. When the salt box 2 is taken out of the salt box cavity 12, the first one-way valve 34 and the second one-way valve 22 are disconnected and closed to avoid water leakage at the connecting port 21 of the salt box 2 and the second interface 33 of the water path plate 3. When the salt box 2 is assembled in the salt box cavity 12 and the second interface 33 is connected with the connecting port 21, the first one-way valve 34 and the second one-way valve 22 are open to ensure the communication of the water path between the salt box 2 and the water path plate 3.

[0047] The water path plate 3 is detachably mounted on the box body 1 through a clamping structure or a locking structure. The plate body 31 is detachably fixed in the mounting cavity 13 through the clamping structure or the locking structure. The first interface 32 and the second interface 33 are fixed on the plate body 31 and extend into the corresponding first connecting part 14 and second connecting part 15 from the mounting cavity 13. The plate body 31 is internally provided with a cavity 311. The first interface 32 and the second interface 33 are communicated through the cavity 311. The cavity 311 can be integrally formed by injection molding or formed by buckling two separate plates. The cavity 311 is a water passage and can communicate the salt valve cavity 11 and the salt box 2 through the first interface 32 and the second interface 33.

[0048] Specifically, the clamping structure can be arranged on the mounting cavity 13 to adapt to the plate body 31. The plate body 31 is clamped at the mounting cavity 13, which is convenient to install and simple in structure.

[0049] For the locking structure, refer to Figure 3The plate body 31 is detachably fixed to the installation cavity 13 by the locking member, the cavity 311 is provided with a protection part 312 for the locking member to pass through, the axial two ends of the protection part 312 extend to the fixed connection plate body 31, and the side wall of the protection part 312 is spaced apart from the side wall of the plate body 31. The locking member can be a screw, a pin, a rivet or the like, and the protection part 312 can avoid corrosion of the locking member by water and saturated brine, thereby prolonging the service life of the locking member and enabling the waterway plate 3 to be stably installed on the box body 1.

[0050] It is worth noting that the protection part 312 contacts the plate body 31 at the axial two ends to protect the locking member in all directions, and the side wall of the protection part 312 needs to be spaced apart from the side wall of the plate body 31 to avoid cutting off the water passage of the cavity 311. The protection part 312 can be integrally formed with the waterway plate 3, or formed by buckling two separate plates.

[0051] Referring to Figure 4 , the salt box 2 is provided with a force applying part 23 corresponding to the opening 121, and the outer wall of the salt box 2 and the inner wall of the salt box cavity 12 are provided with corresponding connecting structures 4 and / or guiding structures 5. The connecting structure 4 includes a buckle structure, and the guiding structure 5 includes a guide rail or a guide groove. The force applying part 23 can be a handle, a pull handle, a lifting handle or the like, which facilitates force application to push and pull the salt box 2. The guide rail or the guide groove and other guiding structures 5 play a guiding role in the pushing and pulling of the salt box 2, facilitating the disassembly of the salt box 2.

[0052] The buckle structure can be arranged at any position corresponding to the outer wall of the salt box 2 and the inner wall of the salt box cavity 12, as shown in Figure 4 , the buckle structure is arranged at the bottom corresponding to the salt box 2 and the salt box cavity 12. When installing the salt box 2, the salt box 2 is slightly lifted upward to push the salt box 2 into the salt box cavity 12, and then pressed downward to stably connect the salt box 2 and the salt box cavity 12 through the buckle structure; when disassembling the salt box 2, the salt box 2 is lifted upward to separate the buckle structure, and then the salt box 2 can be pulled out of the salt box cavity 12.

[0053] In addition, the side and bottom of the box body 1 are provided with a protection plate 6, which is detachably connected to the box body 1 by a locking member and / or a buckle structure. The protection plate 6 is detachably installed on the side and bottom of the box body 1 by a locking member such as a screw and / or a buckle structure of a clamping protrusion-clamping groove cooperation, which not only has the effect of improving the structural strength, but also is beautiful.

[0054] On the basis of the above-mentioned salt tank assembly, the utility model also provides a soft water heater, referring to Figure 5 and Figure 6 , which comprises a main body part 7 and the above-mentioned salt tank assembly, the main body part 7 comprises a hot water assembly for heating water and a soft water assembly for softening water, the soft water assembly is communicated with the hot water assembly and the salt tank assembly, and the salt tank assembly is detachably arranged at the bottom of the main body part 7 by a locking member and / or a buckle structure.

[0055] The soft water component supplies the water softened to the hot water component for heating to output the softened hot water. The soft water component is provided with soft water resin for softening the water. The soft water resin will have its adsorption capacity reduced after long time use. The saturated brine in the salt box 2 flows to the second connecting part 15 through the connecting port 21, then flows to the first connecting part 14 through the first interface 32, the cavity 311 and the second interface 33 in sequence, so as to flow to the salt valve cavity 11 through the first connecting part 14, and then the saturated brine is transported to the soft water component by the salt valve 8 in the salt valve cavity 11 to reactivate the soft water resin. When the water in the salt box 2 is insufficient, the water in the main body part 7 flows to the first connecting part 14 through the salt valve cavity 11 by the salt valve 8, then flows to the second connecting part 15 through the second interface 33, the cavity 311 and the first interface 32 in sequence, so as to flow to the salt box 2 through the connecting port 21 matched with the second interface 33, thereby supplementing the water in the salt box 2 to dissolve the soft water salt to obtain the saturated brine.

[0056] The salt tank assembly is detachably arranged at the bottom of the main body part 7, which does not occupy the space of the main body part 7 and is convenient for dismounting and mounting to supplement the soft water salt. The salt tank assembly can be mounted at the bottom of the main body part 7 by screws or the like. The top of the salt tank assembly is provided with a clamping hook, and the bottom of the main body part 7 is provided with a clamping groove matched with the clamping hook, so as to realize the assembly of the salt tank assembly at the bottom of the main body part 7 by clamping the clamping hook in the clamping groove.

[0057] Therefore, the salt tank assembly is applied to the soft water heater, and the corresponding number of salt box cavities 12, salt boxes 2 and corresponding waterway plates 3 can be adapted according to the user's demand, so as to facilitate the water supplementing or saturated brine outputting of the salt box 2, thereby ensuring the effective activation of the soft water resin in the soft water component, so that the soft water heater can stably output the softened hot water and ensure the use safety of the soft water heater.

[0058] Referring to Figure 7 The hot water component 71 comprises a burner 711 and a heat exchanger 712. The burner 711 is used for heating the heat exchanger 712. The heat exchanger 712 is connected with an external water supply pipe and an external water outlet component through a water inlet pipe 73 and a water outlet pipe 74, so that the water flowing into the heat exchanger 712 through the water inlet pipe 73 is heated and then discharged through the water outlet pipe 74. The soft water component 72 is arranged on the water inlet pipe 73 or the water outlet pipe 74. When the soft water component 72 is arranged on the water inlet pipe 73, the raw water of the external water supply pipe is first softened to obtain soft water, and then heated by the hot water component 71. When the soft water component 72 is arranged on the water outlet pipe 74, the raw water heated by the hot water component 71 is softened.

[0059] The technical means disclosed by the utility model scheme are not limited to the technical means disclosed by the above-mentioned embodiments, and also include technical schemes composed of any combination of the above technical features. It should be noted that, for ordinary skilled persons in the art, without departing from the principles of the utility model, a number of improvements and refinements can be made, and these improvements and refinements are also considered within the protection scope of the utility model.

Claims

1. A soft water water heater, characterized in that, include: The main body includes a hot water assembly for heating water and a soft water assembly for softening water, the soft water assembly being in communication with the hot water assembly; A salt tank assembly, which is detachably disposed at the bottom of the main body and connected to the water softener assembly; The salt tank assembly includes: The box body has a salt valve chamber and at least one salt box chamber opened along a first direction, and the salt box chamber has an opening on one side parallel to the first direction; A salt box, wherein the salt box is adapted to the salt box cavity, and the salt box is detachably installed in the corresponding salt box cavity through the opening; A water channel plate is provided on the side of the housing away from the opening. The interior of the water channel plate has a conductive structure and is correspondingly connected to the salt valve cavity and at least one salt box in the salt box cavity.

2. The soft water water heater according to claim 1, characterized in that: The water circuit board includes a plate body with an internal conductive structure, a first interface corresponding to the salt valve cavity, and a second interface corresponding to the salt box cavity. Both the first interface and the second interface are located on the plate body and are connected to the internal conductive structure. The salt box has a connection port on the bottom side away from the opening. The second interface is connected to the corresponding connection port through the salt box cavity. The first interface is connected to the bottom side of the salt valve cavity away from the opening.

3. The soft water water heater according to claim 2, characterized in that: The housing has an installation cavity on the side opposite to the opening that is adapted to the water circuit board. The water circuit board is detachably installed in the installation cavity. The installation cavity is connected to the salt valve cavity and the salt box cavity through a first connecting part and a second connecting part, respectively. The first interface extends into the first connecting part to connect to the salt valve cavity, and the second interface and the connecting port extend into the second connecting part to be connected.

4. The soft water water heater according to claim 2, characterized in that: A water-stop structure is provided between the second interface and the connection port. When the second interface is connected to the connection port, the water-stop structure is open, and when the second interface is separated from the connection port, the water-stop structure is closed.

5. The soft water water heater according to claim 4, characterized in that: The water-stopping structure includes a first one-way valve located at the second interface and a second one-way valve located at the connection port. When the second interface is connected to the connection port, the first one-way valve and the second one-way valve are connected and open. When the second interface is separated from the connection port, the first one-way valve and the second one-way valve are disconnected and closed.

6. The soft water water heater according to claim 3, characterized in that: The plate is detachably fixed to the mounting cavity by a snap-fit ​​structure or a locking structure. The plate has a cavity inside, and the first interface and the second interface are connected through the cavity.

7. The soft water water heater according to claim 6, characterized in that: The plate is detachably fixed to the mounting cavity by a locking member. The cavity is provided with a protective part for the locking member to pass through. The two ends of the protective part extend axially to be fixedly connected to the plate, and the side wall of the protective part is spaced apart from the side wall of the plate.

8. The soft water water heater according to claim 1, characterized in that: The salt box is provided with a force-applying part corresponding to the opening side, and the outer wall of the salt box and the inner wall of the salt box cavity are provided with a matching connection structure and / or guide structure. The connection structure includes a snap-fit ​​structure, and the guide structure includes a guide rail or a guide groove.

9. The soft water water heater according to claim 1, characterized in that: The sides and bottom of the enclosure are provided with protective plates, which are detachably connected to the enclosure by locking components and / or buckle structures.

10. The soft water water heater according to any one of claims 1-9, characterized in that: The hot water assembly includes a burner and a heat exchanger. The burner is used to heat the heat exchanger. The heat exchanger is connected to an external water supply pipe and an external water outlet assembly through an inlet pipe and an outlet pipe, respectively, so that the water flowing into the heat exchanger from the inlet pipe absorbs heat and is discharged through the outlet pipe. The soft water assembly is installed on the inlet pipe or the outlet pipe.

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