Integrated pump set, heating module and instant water heating equipment

Abstract

The utility model relates to the technical field of water heating equipment, in particular to an integrated pump set, a heating module and instant water heating equipment. The integrated pump set comprises a pump body and an integrated connecting piece. A volume-adjustable pump cavity is formed in the pump body, the integrated connecting piece is connected to the pump body, a water inlet cavity and a water outlet channel which are arranged in a separated mode are formed in the integrated connecting piece, the water inlet cavity is communicated with a water inlet of the pump cavity, and the water outlet channel is communicated with a water outlet of the pump cavity. The integrated connecting piece is provided with an integrated part, a negative pressure cavity is formed in the integrated part and communicates with the water inlet cavity, and the integrated part is provided with a water inlet channel; a pressure control assembly is arranged between the water inlet channel and the negative pressure cavity, and the water inlet channel is in on-off connection with the negative pressure cavity through the pressure control assembly. By the adoption of the integrated pump set, the pressure of input water flow can be adjusted and stabilized, the pump body is protected, and meanwhile the overall space utilization rate of the integrated pump set in water using equipment is effectively guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of hot water equipment technology, and in particular to an integrated pump set, heating module and instant hot water equipment. Background Technology

[0002] Common instant water heating devices, such as instant faucets, instant electric water heaters, or instant water dispensers, typically contain a heating module. A water pump pumps water into the heating module, which then heats the water to provide instant hot water. However, when the water pressure at the inlet changes, the pumping process can cause pressure surges, affecting its lifespan.

[0003] In related technologies, a traditional pressure stabilizing tank or complex piping is usually arranged between the water inlet pipe and the water supply pump to buffer water pressure surges and protect the water supply pump. However, the above arrangement can easily lead to an increase in the overall size of the heating module, affecting the internal component layout of the heating equipment. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides an integrated pump unit, heating module, and instant hot water equipment that can regulate and stabilize the input water pressure, protect the pump body, and effectively ensure the overall space utilization rate of the integrated pump unit within the water-using equipment.

[0005] To solve the above-mentioned technical problems, this utility model provides an integrated pump set, comprising:

[0006] The pump body has a pump chamber with an adjustable volume.

[0007] An integrated connector is attached to the pump body. The integrated connector forms a water inlet chamber and a water outlet channel arranged separately. The water inlet chamber is connected to the water inlet of the pump chamber, and the water outlet channel is connected to the water outlet of the pump chamber.

[0008] The integrated connector is provided with an integrated part, and a negative pressure chamber is formed inside the integrated part. The negative pressure chamber is connected to the water inlet chamber. The integrated part is provided with a water inlet channel. A pressure control component is provided between the water inlet channel and the negative pressure chamber. The water inlet channel is connected to the negative pressure chamber through the pressure control component.

[0009] As an improvement to the above solution, the pressure control assembly includes an elastic diaphragm, a pressure rod, a sealing element, and an elastic element, wherein the elastic diaphragm is located in the negative pressure chamber;

[0010] The integrated connector forms a sealing cavity communicating with the water inlet channel. A water passage hole is arranged between the sealing cavity and the negative pressure cavity. The elastic element and the sealing element are arranged in the sealing cavity in a predetermined direction, and the diameter of the sealing element is larger than the diameter of the water passage hole.

[0011] One end of the pressure rod is located in the negative pressure chamber and is in contact with the elastic diaphragm; the other end of the pressure rod passes through the water passage and is in contact with the sealing element.

[0012] As an improvement to the above solution, the elastic diaphragm is made of a soft material, and a pressure end is formed on the side of the elastic diaphragm facing the pressure rod. One side of the pressure end faces the negative pressure cavity, and an atmospheric cavity is formed on the other side of the pressure end.

[0013] As an improvement to the above solution, the integrated part is detachably connected to a first mounting block and a second mounting block, the first mounting block being disposed on one side of the negative pressure chamber and the second mounting block being disposed on one side of the sealing chamber.

[0014] As an improvement to the above solution, the elastic diaphragm has a fixed end face, which is located between the first mounting block and the integrated part. The first mounting block has a balancing vent, which is located inside the fixed end face.

[0015] As an improvement to the above solution, a sealing element is provided between the first mounting block and the integrated part, and between the second mounting block and the integrated part.

[0016] As an improvement to the above solution, the integrated connector has a first connecting portion, the pump body has a second connecting portion, and the first connecting portion and the second connecting portion are detachably connected.

[0017] As an improvement to the above solution, the pump body includes a pump housing, a drive component, a linkage component, and multiple flexible pump plugs. The drive component is connected to the pump housing, and the linkage component and the flexible pump plugs are located inside the pump housing. The rotating shaft of the linkage component is rotatably connected to the output shaft of the drive component, and the rotating shaft of the linkage component is eccentrically arranged with respect to the output shaft of the drive component.

[0018] The flexible pump plug has a plunger formed on the side facing the drive member, and each plunger is connected to the linkage member. The pump chamber is located on the side of the flexible pump plug away from the drive member.

[0019] Accordingly, this utility model also provides a heating module, including a heating tube assembly and an integrated pump assembly as described in any one of the above, wherein the integrated connector is detachably connected to the housing of the heating tube assembly, and the water outlet channel is unidirectionally connected to the water inlet of the heating tube assembly.

[0020] Accordingly, this utility model also provides an instant hot water device, including a housing and the heating module described above, wherein the heating module is disposed inside the housing.

[0021] Implementing this utility model has the following beneficial effects:

[0022] The integrated pump set in this embodiment can be connected to water-using equipment through a water outlet channel to pump water to the equipment and supply it with water. When water needs to be pumped using the integrated pump set, the water inlet channel in the integrated unit is connected to the water inlet pipe, driving the pump body to operate and increasing the pump chamber volume, so that a connected negative pressure environment is formed in the pump chamber, the water inlet chamber, and the negative pressure chamber. Under the combined effect of the negative pressure environment in the negative pressure chamber and the water pressure outside the water inlet channel, the pressure control component is activated, connecting the water inlet channel to the negative pressure chamber, so that water flows into the pump chamber after passing through the water inlet channel, the negative pressure chamber, and the water inlet chamber. Subsequently, during the operation of the pump body, the pump chamber volume decreases, and the water pressure in the pump chamber, the water inlet chamber, and the negative pressure chamber increases, closing the pressure control component, thereby preventing water from the water inlet channel from continuing to flow into the negative pressure chamber.

[0023] Furthermore, the integrated connector provides installation space for the pressure control component, integrating the pressure control component into the pump body. This allows the pressure control component and the negative pressure chamber to work together to regulate and stabilize the input water pressure, protecting the pump body. At the same time, it avoids increasing the volume of the pump body after integrating the pressure stabilizing device, effectively ensuring the overall space utilization rate of the integrated pump set within the water-using equipment. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the pump unit in one embodiment of the present invention;

[0025] Figure 2 This is an exploded structural diagram of the pump unit in one embodiment of the present invention;

[0026] Figure 3 This is a cross-sectional view of the pump unit in one embodiment of the present invention;

[0027] Figure 4 yes Figure 3 Enlarged structural diagram at point A;

[0028] Figure 5 This is one of the schematic diagrams showing the location distribution of the integrated part in one embodiment of this utility model, wherein the water inlet channel is disconnected from the negative pressure chamber;

[0029] Figure 6 This is one of the schematic diagrams showing the position distribution of the integrated part in one embodiment of the present invention, wherein the water inlet channel is connected to the negative pressure chamber;

[0030] Figure 7 This is an exploded structural diagram of the pump body in one embodiment of the present invention;

[0031] Figure 8 This is a schematic diagram of the connection structure between the driving component and the linkage component in one embodiment of the present invention. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will describe this utility model in further detail with reference to the accompanying drawings. It is hereby declared that the terms "up," "down," "left," "right," "front," "back," "inner," and "outer," etc., appearing or about to appear in this document, are based solely on the accompanying drawings and are not intended to specifically limit this utility model.

[0033] The integrated pump set of this utility model can regulate and stabilize the input water flow pressure, protect the pump body 1, and effectively ensure the overall space utilization rate of the integrated pump set in the water-using equipment.

[0034] In one specific embodiment of this utility model, such as Figures 1 to 3 As shown, the integrated pump unit includes a pump body 1 and an integrated connector 2. The pump body 1 forms a pump chamber 11 with adjustable volume. The integrated connector 2 is connected to the pump body 1 and forms a water inlet chamber 201 and a water outlet channel 202 arranged separately. The water inlet chamber 201 is connected to the water inlet of the pump chamber 11, and the water outlet channel 202 is connected to the water outlet of the pump chamber 11. The integrated connector 2 is provided with an integrated part 21, and a negative pressure chamber 211 is formed inside the integrated part 21. The negative pressure chamber 211 is connected to the water inlet chamber 201. The integrated part 21 is provided with a water inlet channel 212. A pressure control component 22 is provided between the water inlet channel 212 and the negative pressure chamber 211. The water inlet channel 212 is connected to the negative pressure chamber 211 through the pressure control component 22.

[0035] The integrated pump set in this embodiment can be connected to water-using equipment through the water outlet channel 202 to pump water to the water-using equipment and supply water to it. When water needs to be pumped using the integrated pump set, the water inlet channel 212 in the integrated part 21 is connected to the water inlet pipe, driving the pump body 1 to operate and increasing the volume of the pump chamber 11, so that a connected negative pressure environment is formed in the pump chamber 11, the water inlet chamber 201, and the negative pressure chamber 211. Under the cooperation of the negative pressure environment in the negative pressure chamber 211 and the water pressure outside the water inlet channel 212, the pressure control component 22 is opened, connecting the water inlet channel 212 and the negative pressure chamber 211, so that water flows through the water inlet channel 212, the negative pressure chamber 211, and the water inlet chamber 201 before entering the pump chamber 11. Subsequently, during the operation of the pump body 1, the volume of the pump chamber 11 decreases, and the water pressure in the pump chamber 11, the inlet chamber 201 and the negative pressure chamber 211 increases, which closes the pressure control component 22, thereby preventing the water in the inlet channel 212 from continuing to flow into the negative pressure chamber 211.

[0036] Furthermore, the integrated part 21 of the integrated connector 2 provides installation space for the pressure control component 22, and the pressure control component 22 is integrated into the pump body 1 so that the pressure control component 22 and the negative pressure chamber 211 can work together to regulate and stabilize the input water flow pressure and protect the pump body 1; at the same time, it avoids the increase in volume after the pump body 1 is integrated with the pressure stabilizing device, and effectively ensures the overall space utilization rate of the integrated pump set in the water-using equipment.

[0037] It should be noted that the water-using equipment can be an instant faucet, an instant electric water heater, or an instant water dispenser, etc., which requires the use of warm or hot water. The water outlet channel 202 of the integrated pump set is connected to the water inlet pipe of the heating module of the aforementioned hot water-using equipment.

[0038] Of course, the water-using equipment can also be a cold water dispenser, a water purifier, or a cold water circulation system, etc., which require the use of cold water. The water outlet channel 202 of the integrated pump set is connected to the water inlet pipe of the aforementioned cold water-using equipment.

[0039] Among them, such as Figure 3 and Figure 4 As shown, the pressure control assembly 22 includes an elastic diaphragm 221, a pressure rod 222, a sealing element 223, and an elastic element 224. The elastic diaphragm 221 is located in the negative pressure chamber 211. The integrated connector 2 forms a sealing chamber 213 communicating with the water inlet channel 212. A water passage 214 is arranged between the sealing chamber 213 and the negative pressure chamber 211. The elastic element 224 and the sealing element 223 are arranged in the sealing chamber 213 in a predetermined direction, and the diameter of the sealing element 223 is larger than the diameter of the water passage 214. In this embodiment, the predetermined direction is from the sealing chamber 213 to the negative pressure chamber 211 (i.e., the direction from the sealing chamber 213 to the negative pressure chamber 211). Figure 3 (From left to right). One end of the pressure rod 222 is located in the negative pressure chamber 211 and is in contact with the elastic diaphragm 221; the other end of the pressure rod 222 passes through the water passage 214 and is in contact with the sealing member 223.

[0040] It is understandable that, such as Figure 5 As shown, when no negative pressure environment is formed in the negative pressure chamber 211, under the elastic force of the elastic member 224, the sealing member 223 abuts against the wall surface of the water passage 214 formed in the sealing chamber 213, so as to disconnect the water inlet channel 212 from the negative pressure chamber 211 by using the sealing member 223.

[0041] like Figure 6As shown, when the negative pressure chamber 211 forms a negative pressure environment under the action of the pump body 1, the elastic diaphragm 221 is subjected to suction and undergoes elastic deformation, pushing the pressure rod 222 towards the sealing chamber 213. The pressure rod 222 presses the sealing member 223, and the sealing member 223 compresses the elastic member 224, causing the sealing member 223 to detach from the inner wall surface of the sealing chamber 213, connecting the water passage 214 with the sealing chamber 213, so that the negative pressure suction in the negative pressure chamber 211 draws the water flow in the sealing chamber 213 into the negative pressure chamber 211 and the water inlet chamber 201, and into the pump chamber 11 of the pump body 1, thus realizing the input of water flow.

[0042] When the water pressure in the negative pressure chamber 211 increases, the elastic diaphragm 221 is subjected to pressure and disengages from the pressure rod 222. At this time, under the action of the elastic force of the elastic element 224, the sealing element 223 moves towards the wall surface of the water passage 214 formed in the sealing chamber 213, disconnecting the water passage 214 from the sealing chamber 213, thereby preventing the water in the negative pressure chamber 211 from flowing back to the water inlet channel 212, and ensuring that the water can be pumped out from the water outlet channel 202 of the integrated connector 2.

[0043] It should be noted that the elastic element 224 is preferably a spring, and the sealing element 223 is a piston. The sum of the free length of the spring and the length of the piston is preferably greater than or equal to the length of the sealing cavity 213, to ensure that the piston can abut against the wall of the sealing cavity 213 forming the water passage 214 under the action of the spring. At the same time, the diameter of the end of the piston facing the water passage 214 is larger than the diameter of the water passage 214, to ensure the sealing effect of the piston on the water passage 214.

[0044] Specifically, such as Figure 5 and Figure 6 As shown, the elastic diaphragm 221 is made of a soft material, preferably rubber. A pressure end 225 is formed on the side of the elastic diaphragm 221 facing the pressure rod 222. One side of the pressure end 225 faces the negative pressure chamber 211, and the other side forms an atmospheric cavity 226. This ensures that, under the negative pressure environment of the negative pressure chamber 211 and the cooperation of the atmospheric cavity 226, the elastic diaphragm 221 can undergo elastic deformation into the negative pressure chamber 211 and move the pressure rod 222 towards the sealing cavity 213 via the pressure end 225. Simultaneously, when the water pressure in the negative pressure chamber 211 increases, the elastic diaphragm 221 can reset and disengage from the pressure rod 222, ensuring the effective cooperation between the elastic diaphragm 221 and the pressure rod 222.

[0045] In this embodiment, to facilitate the installation of the pressure control component 22 in the integration unit 21, such as Figure 1 and Figure 2As shown, the integration unit 21 is detachably connected to a first mounting block 231 and a second mounting block 232. The first mounting block 231 is disposed on one side of the negative pressure chamber 211, and the second mounting block 232 is disposed on one side of the sealing chamber 213. When installing the pressure control component 22, the first mounting block 231 and the second mounting block 232 can be removed from the integration unit 21, and the sealing member 223 and the elastic member 224 can be sequentially assembled into the sealing chamber 213. The pressure rod 222 and the elastic diaphragm 221 can be sequentially assembled into the negative pressure chamber 211, thus completing the installation process of the pressure control component 22 in the integration unit 21.

[0046] like Figure 4 and Figure 5 As shown, the elastic diaphragm 221 has a fixed end face 228, which is located between the first mounting block 231 and the integrated part 21. The first mounting block 231 has a balancing vent 233, which is located inside the fixed end face 228, so that an atmospheric cavity 226 is formed between the balancing vent 233 and the elastic diaphragm 221. The balancing vent 233 is connected to the external atmosphere of the first mounting block 231, ensuring that the elastic diaphragm 221 moves towards the negative pressure cavity 211 under the cooperation of the negative pressure cavity 211 and the atmospheric cavity 226, thereby pushing the pressure rod 222 to move.

[0047] Furthermore, a sealing element (not shown in the figure) is provided between the first mounting block 231 and the integrated part 21, and between the second mounting block 232 and the integrated part 21, so as to seal the negative pressure chamber 211 and the sealing chamber 213, and prevent water leakage in the sealing chamber 213 and the negative pressure chamber 211 when the integrated pump unit is filled with water.

[0048] Preferably, the sealing element is a gasket.

[0049] It should be noted that the integration part 21 and the first mounting block 231 and the second mounting block 232 are all formed with dovetail grooves. When the first mounting block 231 and the second mounting block 232 are connected to the integration part 21, the first mounting block 231 and the second mounting block 232 can be embedded in the integration part 21 through the cooperation of the dovetail grooves, thereby completing the installation of the first mounting block 231 and the second mounting block 232.

[0050] Of course, the detachable connection between the first mounting block 231 and the second mounting block 232 is not limited to the detachable connection achieved by the dovetail groove. Threaded holes can also be formed in the first mounting block 231 and the second mounting block 232, and the first mounting block 231 and the second mounting block 232 can be detachably connected by threaded fasteners (such as bolts, studs, or screws).

[0051] In embodiments of this utility model, such as Figure 2As shown, the integrated connector 2 has a first connecting portion 24, and the pump body 1 has a second connecting portion 12. The first connecting portion 24 and the second connecting portion 12 are detachably connected so that the integrated connector 2 can be installed in the pump body 1 and the integrity between the pressure control assembly 22 and the pump body 1 can be ensured.

[0052] Specifically, the first connecting part 24 is a through hole formed in the integrated connector 2, and the second connecting part 12 is a threaded hole formed in the pump body 1. When the integrated connector 2 is installed on the pump body 1, the integrated connector 2 and the pump body 1 can be detachably connected by fasteners such as bolts or studs being inserted into the through hole and the threaded hole in sequence.

[0053] In embodiments of this utility model, such as Figure 3 and Figure 7 As shown, the pump body 1 includes a pump housing 13, a drive member 14, a linkage member 15, and multiple flexible pump plugs 16. The drive member 14 is connected to the pump housing 13. The linkage member 15 and the flexible pump plugs 16 are located inside the pump housing 13. The rotating shaft of the linkage member 15 is rotatably connected to the output shaft of the drive member 14, and the rotating shaft of the linkage member 15 is eccentrically arranged with respect to the output shaft of the drive member 14. A plug 161 is formed on the side of the flexible pump plug 16 facing the drive member 14. Each plug 161 is connected to the linkage member 15. The pump chamber 11 is located on the side of the flexible pump plug 16 away from the drive member 14.

[0054] When the pump body 1 is working, the drive component 14 rotates, causing the linkage component 15 to reciprocate up and down relative to the pump casing 13. During this movement, the linkage component 15 tilts relative to the pump body 1 and, through the plunger 161, pulls up the flexible pump plug 16, increasing the volume of the pump chamber 11 to ensure a connected negative pressure environment in the pump chamber 11, the inlet chamber 201, and the negative pressure chamber 211. Subsequently, the drive component 14 drives the linkage component 15 to continue rotating, pressing the flexible pump plug 16 through the plunger 161 to reduce the volume of the pump chamber 11, thus pumping the water from the pump chamber 11 out through the outlet channel 202 to supply water to the water-using equipment.

[0055] It should be noted that since the linkage 15 is connected to multiple flexible pump plugs 16 at the same time, when the linkage 15 is tilted, it can simultaneously press down on the flexible pump plugs 16 and pull up on the flexible pump plugs 16, thereby improving the pumping efficiency of the pump body 1.

[0056] Preferably, such as Figure 8 As shown, the output shaft of the drive member 14 is connected to an eccentric connector 141, and the rotating shaft of the linkage member 15 is inclinedly connected to the side of the eccentric connector 141 away from the drive member 14, so as to achieve an eccentric connection between the rotating shaft of the linkage member 15 and the output shaft of the drive member 14, ensuring that the linkage member 15 can pull up or press the flexible pump plug 16 when rotating, forming a negative pressure environment or pumping water to the outlet channel 202.

[0057] Preferably, the linkage 15 has multiple connecting holes, and each plunger 161 is connected to one of the connecting holes to ensure that the linkage 15 can drive the flexible pump plunger 16 to undergo elastic deformation when it reciprocates up and down. The flexible pump plunger 16 is made of rubber material to ensure that the structure of the flexible pump plunger 16 is not damaged when it undergoes elastic deformation.

[0058] Accordingly, this utility model also provides a heating module, which includes a heating tube assembly and an integrated pump assembly as described in any of the above embodiments. The integrated connector 2 is detachably connected to the housing of the heating tube assembly, and the water outlet channel 202 is unidirectionally connected to the water inlet of the heating tube assembly. The integrated connector 2 can integrate the heating tube assembly and the pump body 1 into a single structure, thereby simplifying the assembly method of each component in the heating module and ensuring the installation efficiency of the heating module.

[0059] In addition, the heating module has all the beneficial effects of the integrated pump unit mentioned above, which will not be elaborated here.

[0060] Accordingly, this utility model also provides an instant hot water device, which includes a housing and the heating module described in the above embodiments, with the heating module disposed inside the housing. The instant hot water device possesses all the beneficial effects of the aforementioned heating module and the aforementioned integrated pump unit, which will not be elaborated further here.

[0061] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this invention, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. An integrated pump package, characterized by, include: The pump body has a pump chamber with an adjustable volume. An integrated connector is attached to the pump body. The integrated connector forms a water inlet chamber and a water outlet channel arranged separately. The water inlet chamber is connected to the water inlet of the pump chamber, and the water outlet channel is connected to the water outlet of the pump chamber. The integrated connector is provided with an integrated part, and a negative pressure chamber is formed inside the integrated part. The negative pressure chamber is connected to the water inlet chamber. The integrated part is provided with a water inlet channel. A pressure control component is provided between the water inlet channel and the negative pressure chamber. The water inlet channel is connected to the negative pressure chamber through the pressure control component.

2. The integrated pump set of claim 1, wherein, The pressure control assembly includes an elastic diaphragm, a pressure rod, a sealing element, and an elastic element, wherein the elastic diaphragm is located in the negative pressure chamber; The integrated connector forms a sealing cavity communicating with the water inlet channel. A water passage hole is arranged between the sealing cavity and the negative pressure cavity. The elastic element and the sealing element are arranged in the sealing cavity in a predetermined direction, and the diameter of the sealing element is larger than the diameter of the water passage hole. One end of the pressure rod is located in the negative pressure chamber and is in contact with the elastic diaphragm; the other end of the pressure rod passes through the water passage and is in contact with the sealing element.

3. The integrated pump set of claim 2, wherein, The elastic diaphragm is made of a soft material, and a pressure end is formed on the side of the elastic diaphragm facing the pressure rod. One side of the pressure end faces the negative pressure cavity, and the other side of the pressure end forms an atmospheric cavity.

4. The integrated pump set of claim 2, wherein, The integrated unit is detachably connected to a first mounting block and a second mounting block. The first mounting block is disposed on one side of the negative pressure chamber, and the second mounting block is disposed on one side of the sealing chamber.

5. The integrated pump set of claim 4, wherein, The elastic diaphragm has a fixed end face, which is located between the first mounting block and the integrated part. The first mounting block has a balancing vent, which is located inside the fixed end face.

6. The integrated pump set of claim 5, wherein, A sealing element is provided between the first mounting block and the integrated part, and between the second mounting block and the integrated part.

7. The integrated pump set of claim 1, wherein, The integrated connector has a first connecting portion, and the pump body has a second connecting portion, wherein the first connecting portion and the second connecting portion are detachably connected.

8. The integrated pump set of claim 1, wherein, The pump body includes a pump housing, a drive component, a linkage component, and multiple flexible pump plugs. The drive component is connected to the pump housing, and the linkage component and the flexible pump plugs are located inside the pump housing. The rotating shaft of the linkage component is rotatably connected to the output shaft of the drive component, and the rotating shaft of the linkage component is eccentrically arranged with respect to the output shaft of the drive component. The flexible pump plug has a plunger formed on the side facing the drive member, and each plunger is connected to the linkage member. The pump chamber is located on the side of the flexible pump plug away from the drive member.

9. A heating module, characterized in that It includes a heating tube assembly and an integrated pump assembly as described in any one of claims 1 to 8, wherein the integrated connector is detachably connected to the housing of the heating tube assembly, and the water outlet channel is unidirectionally connected to the water inlet of the heating tube assembly.

10. An instant hot water appliance characterized in that, It includes a housing and the heating module as described in claim 9, wherein the heating module is disposed inside the housing.

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