A pipeline cleaning liquid injection device for heat pump water heater

Abstract

The invention discloses a pipeline cleaning liquid injection device for a heat pump water heater, comprising a connecting pipe, a liquid adding cylinder fixedly connected to the communicating hole, the liquid adding cylinder being a hollow structure and having a vertical tube at the lower end, a sealing ball provided in the liquid adding cylinder, the sealing ball blocking the upper end of the vertical tube and isolating the vertical tube inner cavity from the inner cavity of the liquid adding cylinder; an end cap fixedly connected to the upper end of the liquid adding cylinder, a guide cylinder fixedly connected to the upper end of the end cap, a transmission rod fixedly connected to the upper end of the sealing ball, the upper end of the transmission rod passing through the guide hole and fixedly connected to a guide column, the guide column movably connected in the guide cylinder, the outer diameter of the guide column being greater than the outer diameter of the sealing ball; a first compression spring is provided in the liquid adding cylinder, and the first compression spring is sleeved on the outer side of the transmission rod. The present invention can automatically add cleaning liquid to the pipeline by turning on a driving motor, and can facilitate the cleaning operation.

Description

Technical field:

[0001] The invention relates to the technical field of heat pump water heater structures, and in particular to a pipeline cleaning liquid injection device for a heat pump water heater. Background technology:

[0002] Heat pump water heaters are also called air energy water heaters. They absorb low-temperature heat from the air, gasify it through fluorine medium, compress it through a compressor, increase the pressure and temperature, and then convert it into water heating through a heat exchanger. The compressed high-temperature heat energy is used to heat the water. The heat pump in a heat pump water heater is an efficient energy-saving device that makes full use of low-grade thermal energy. Heat can be transferred spontaneously from a high-temperature object to a low-temperature object, but it cannot be transferred spontaneously in the opposite direction. The working principle of the heat pump is a mechanical device that forces heat to flow from a low-temperature object to a high-temperature object in a reverse cycle. It consumes only a small amount of reverse cycle net work to obtain a large amount of heat supply, and can effectively utilize the difficult-to-use low-grade thermal energy to achieve energy saving.

[0003] The existing air source heat pump water heater has a small water flow cross-sectional area. The scaling of the water heater pipes in the system can easily cause pipe blockage. The pipes are densely packed, and pipe blockage has a greater impact on the system. At the same time, the scaling of the pipes is difficult to clean. Summary of the invention:

[0004] The purpose of the present invention is to solve the technical problem that the existing heat pump water heater pipeline is difficult to clean after scaling, and to provide a pipeline cleaning liquid injection device for a heat pump water heater. Through the cleaning liquid injection device, a descaling agent-type cleaning liquid is regularly injected into the hot water pipeline of the water heater, thereby descaling the dense pipeline.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A pipeline cleaning liquid injection device for a heat pump water heater comprises a connecting pipe, one end of the connecting pipe is fixedly connected to a first one-way valve, and the other end of the connecting pipe is fixedly connected to a second one-way valve, the flow direction of the first one-way valve is the flow direction into the connecting pipe, and the flow direction of the second one-way valve is the flow direction out of the connecting pipe; a connecting pipe wall is provided with a connecting hole, a liquid adding cylinder is fixedly connected to the connecting hole, the liquid adding cylinder is a hollow structure and a vertical pipe is provided at the lower end, the vertical pipe is inserted and fixed in the connecting hole, and the cavity in the pipe of the vertical pipe is connected with the inner cavity of the connecting pipe, a sealing ball is provided in the liquid adding cylinder, the sealing ball blocks the upper end of the vertical pipe and isolates the inner cavity of the vertical pipe from the inner cavity of the liquid adding cylinder; the upper end of the liquid adding cylinder is fixedly connected to an end cap, the upper end of the end cap is fixedly connected to a guide cylinder, the middle part of the end cap is provided with a guide hole, the upper end of the sealing ball is fixedly connected to a transmission rod, the upper end of the transmission rod passes through the guide hole and is fixedly connected to a guide column, the guide column The cam is movably connected in the guide cylinder and sealed with the inner wall of the guide cylinder, the outer diameter of the guide column is larger than the outer diameter of the sealing ball; a first compression spring is provided in the liquid adding cylinder, the first compression spring is sleeved on the outer side of the transmission rod, one end of the first compression spring abuts against the upper surface of the sealing ball and the other end abuts against the lower surface of the end cover; a through hole is provided on the end cover to connect the inner cavity of the liquid adding cylinder with the inner cavity of the guide cylinder; an injection tube is fixedly connected to the cover plate, the interior of the injection tube is a hollow structure and the bottom is provided with an injection hole connected to the inner cavity of the liquid adding cylinder, the upper end of the injection tube is fixedly connected to the upper cover, a driving motor is fixedly installed on the upper cover, the output shaft of the driving motor passes through the upper cover and is fixedly connected to a rotating rod, the rotating rod is located in the injection tube and fixedly connected to a spiral blade on the outer wall, the spiral blade is used to squeeze the liquid in the injection tube to the injection hole after rotation, and a liquid inlet is provided on the upper cover, and a liquid inlet is fixedly connected to the liquid inlet for providing a cleaning liquid.

[0007] Furthermore, the first one-way valve and the second one-way valve each include a valve body, a valve cavity penetrating the valve body is provided inside the valve body, a movable valve core ball is provided in the valve cavity, a first water inlet hole is provided in the valve cavity near the end where the internal water flows in, the valve core ball abuts against the end of the first water inlet hole and forms a sealing fit, a limit plate is threadedly connected to the middle of the valve cavity, a second compression spring is provided between the limit plate and the valve core ball, and a through hole is opened on the limit plate.

[0008] Furthermore, the limit plate is provided with a step column protruding toward the side of the valve core ball, and the second compression spring is sleeved on the outer side of the step column.

[0009] Furthermore, a movable in-tube ball is provided in the vertical tube, a second water inlet hole is provided at one end of the vertical tube close to the sealing ball, the in-tube ball abuts against the second water inlet hole, a positioning plate is threadedly connected to the middle part of the vertical tube, a third compression spring is provided between the positioning plate and the in-tube ball, and a through hole is opened on the positioning plate.

[0010] Furthermore, a sealing plate is fixedly connected to the upper end of the guide cylinder, and a ventilation hole is provided in the middle of the sealing plate.

[0011] Furthermore, the end of the first one-way valve away from the connecting pipe is threadedly connected to a first connecting joint, and the first connecting joint is used to be connected to an end of the water heater close to the water inlet; the end of the second one-way valve away from the connecting pipe is threadedly connected to a second connecting joint, and the second connecting joint is used to be connected to the water pipe of the water heater.

[0012] The invention provides a pipeline cleaning liquid injection device for a heat pump water heater, which has the following beneficial effects: during use, the entire device is connected in series in the water pipeline of the heat pump water heater. When the water heater is in normal use, the sealing ball closes the upper end of the vertical pipe, and water flows into the connecting pipe from the first one-way valve and flows out from the second one-way valve; the cleaning liquid for cleaning the pipeline is stored in the injection pipe, and the liquid inlet pipe at the upper end of the injection pipe is connected to a storage container for the cleaning liquid. When the pipeline needs to be cleaned, the water source at the water inlet end of the first one-way valve is closed, the drive motor is powered on, and the output shaft of the drive motor rotates to drive the rotating rod to rotate, thereby driving the spiral blade to rotate. The rotating spiral blades squeeze the liquid in the injection pipe toward the injection hole, so that the cleaning fluid is injected into the liquid adding cylinder. The spiral blades continue to rotate, so that the liquid pressure in the liquid adding cylinder continues to be above. When the pressure increases to a certain level, the pressure in the liquid presses on the lower end surface of the guide column and causes the guide column to move upward, thereby driving the sealing ball to separate from the upper end of the vertical pipe. The cleaning liquid in the liquid adding cylinder then flows into the connecting pipe and flows into the water pipe from the second one-way valve end, thereby cleaning the scale in the water pipe. The above scheme can efficiently clean the water pipe in the heat pump water heater, and can automatically add cleaning liquid to the pipeline by turning on the drive motor, which can facilitate the cleaning operation. Description of the drawings:

[0013] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings:

[0014] Figure 1 A schematic diagram of the structure of a pipeline cleaning liquid injection device for a heat pump water heater provided by the present invention;

[0015] Figure 2 for Figure 1 Schematic diagram of the local structure of part A in the middle;

[0016] Figure 3 for Figure 1 Schematic diagram of the local structure of the middle B part;

[0017] Figure 4 for Figure 1 Schematic diagram of the local structure of part C in the middle.

[0018] Explanation of the numbers in the figure: 1. connecting pipe; 11. connecting hole; 2. first one-way valve; 21. valve body; 22. valve chamber; 23. valve core ball; 24. first water inlet hole; 25. limit plate; 251. step column; 26. second compression spring; 27. first connecting joint; 3. second one-way valve; 31. second connecting joint; 4. liquid adding cylinder; 41. vertical pipe; 411. ball in the tube; 412. second water inlet hole; 413. positioning plate; 414. third compression spring; 42. sealing ball; 43. end cover; 44. guide cylinder; 45. transmission rod; 46. guide column; 47. first compression spring; 48. sealing plate; 5. liquid injection pipe; 51. liquid injection hole; 52. upper cover; 53. driving motor; 54. rotating rod; 55. spiral blade; 56. liquid inlet pipe. Specific implementation method:

[0019] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] It should be noted that all directional indications in the embodiments of the present invention (such as up-down-left-right-front-back...) are only used to explain the relative position relationship - movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. The connection can be a direct connection or an indirect connection.

[0022] like Figure 1-4As shown, a pipeline cleaning liquid injection device for a heat pump water heater comprises a connecting pipe 1, one end of the connecting pipe 1 is fixedly connected to a first one-way valve 2, the other end of the connecting pipe 1 is fixedly connected to a second one-way valve 3, the flow direction of the first one-way valve 2 is the flow direction into the connecting pipe 1, and the flow direction of the second one-way valve 3 is the flow direction out of the connecting pipe 1; a connecting hole 11 is opened on the pipe wall of the connecting pipe 1, a liquid adding cylinder 4 is fixedly connected to the connecting hole 11, the liquid adding cylinder 4 is a hollow structure and a vertical pipe 41 is provided at the lower end, and the vertical pipe 41 is inserted The vertical tube 41 is fixed in the communicating hole 11 and the inner cavity of the tube is communicated with the inner cavity of the connecting tube 1. A sealing ball 42 is provided in the liquid adding cylinder 4. The sealing ball 42 blocks the upper end of the vertical tube 41 and isolates the inner cavity of the vertical tube 41 from the inner cavity of the liquid adding cylinder 4. The upper end of the liquid adding cylinder 4 is fixedly connected to an end cover 43. The upper end of the end cover 43 is fixedly connected to a guide cylinder 44. A guide hole is provided in the middle of the end cover 43. The upper end of the sealing ball 42 is fixedly connected to a transmission rod 45. The upper end of the transmission rod 45 passes through the guide hole and is fixedly connected to a guide column 46. The guide column 46 The guide column 46 is movably connected in the guide cylinder 44 and seals with the inner wall of the guide cylinder 44. The outer diameter of the guide column 46 is larger than the outer diameter of the sealing ball 42. The liquid adding cylinder 4 is provided with a first compression spring 47, which is sleeved on the outside of the transmission rod 45. One end of the first compression spring 47 abuts against the upper surface of the sealing ball 42 and the other end abuts against the lower surface of the end cover 43. The end cover 43 is provided with a through hole that connects the inner cavity of the liquid adding cylinder 4 with the inner cavity of the guide cylinder 44. The cover plate is fixedly connected with a liquid injection tube 5, and the inside of the liquid injection tube 5 is a hollow structure and A liquid injection hole 51 connected to the inner cavity of the liquid adding cylinder 4 is provided at the bottom, and an upper cover 52 is fixedly connected to the upper end of the liquid injection tube 5, and a driving motor 53 is fixedly installed on the upper cover 52. The output shaft of the driving motor 53 passes through the upper cover 52 and is fixedly connected to a rotating rod 54. The rotating rod 54 is located in the liquid injection tube 5 and is fixedly connected to a spiral blade 55 on the outer wall. The spiral blade 55 is used to squeeze the liquid in the liquid injection tube 5 toward the liquid injection hole 51 after rotation. A liquid inlet is opened on the upper cover 52, and a liquid inlet pipe 56 for providing cleaning liquid is fixedly connected to the liquid inlet.

[0023] Specifically, the first one-way valve 2 and the second one-way valve 3 each include a valve body 21, the valve body 21 is internally provided with a valve cavity 22 which passes through the valve body 21, the valve cavity 22 is provided with a movable valve core ball 23, the valve cavity 22 is provided with a first water inlet hole 24 near the end where the internal water flows in, the valve core ball 23 abuts against the end of the first water inlet hole 24 and forms a sealing fit, the middle part of the valve cavity 22 is threadedly connected with a limit plate 25, a second compression spring 26 is provided between the limit plate 25 and the valve core ball 23, and a through hole is opened on the limit plate 25.

[0024] Specifically, the limiting plate 25 is provided with a step column 251 protruding toward one side of the valve core ball 23 , and the second compression spring 26 is sleeved on the outer side of the step column 251 .

[0025] Specifically, a movable in-tube ball 411 is provided in the vertical tube 41, and a second water inlet hole 412 is provided at one end of the vertical tube 41 close to the sealing ball 42. The in-tube ball 411 abuts against the second water inlet hole 412. A positioning plate 413 is threadedly connected to the middle part of the vertical tube 41, and a third compression spring 414 is provided between the positioning plate 413 and the in-tube ball 411. A through hole is opened on the positioning plate 413.

[0026] Specifically, a sealing plate 48 is fixedly connected to the upper end of the guide cylinder 44 , and a ventilation hole is provided in the middle of the sealing plate 48 .

[0027] Specifically, the end of the first one-way valve 2 away from the connecting pipe 1 is threadedly connected to a first connecting joint 27, and the first connecting joint 27 is used to be connected to an end of the water heater close to the water inlet; the end of the second one-way valve 3 away from the connecting pipe 1 is threadedly connected to a second connecting joint 31, and the second connecting joint 31 is used to be connected to the water pipe of the water heater.

[0028] By adopting the above technical solution, during use, the entire device is connected in series in the water pipeline of the heat pump water heater. When the water heater is in normal use, the sealing ball 42 closes the upper end of the vertical pipe 41, and the water flows into the connecting pipe 1 from the first one-way valve 2 and flows out from the second one-way valve 3; the injection pipe 5 stores a cleaning liquid for cleaning the pipeline, and the liquid inlet pipe 56 at the upper end of the injection pipe 5 is connected to the storage container of the cleaning liquid. When the pipeline needs to be cleaned, the water source at the water inlet end of the first one-way valve 2 is closed, the drive motor 53 is powered on, and the output shaft of the drive motor 53 rotates to drive the rotating rod 54 rotates, thereby driving the spiral blade 55 to rotate. The rotating spiral blade 55 squeezes the liquid in the injection tube 5 toward the injection hole 51, so that the cleaning liquid is injected into the liquid adding cylinder 4. The spiral blade 55 continues to rotate, so that the liquid pressure in the liquid adding cylinder 4 continues to be as above. When the pressure increases to a certain level, the pressure in the liquid presses the lower end surface of the guide column 46 and causes the guide column 46 to move upward, thereby driving the sealing ball 42 to separate from the upper end of the vertical pipe 41. The cleaning liquid in the liquid adding cylinder 4 then flows into the connecting pipe 1 and flows into the water pipe from the end of the second one-way valve 3, thereby cleaning the scale in the water pipe.

[0029] The above shows and describes the basic principles, main features and characteristics of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A pipeline cleaning liquid injection device for a heat pump water heater, characterized in that: The invention comprises a connecting pipe (1), one end of the connecting pipe (1) is fixedly connected to a first one-way valve (2), the other end of the connecting pipe (1) is fixedly connected to a second one-way valve (3), the flow direction of the first one-way valve (2) is the flow direction into the connecting pipe (1), and the flow direction of the second one-way valve (3) is the flow direction out of the connecting pipe (1); a connecting hole (11) is provided on the wall of the connecting pipe (1), a liquid adding cylinder (4) is fixedly connected to the connecting hole (11), the liquid adding cylinder (4) is a hollow structure and a vertical pipe (41) is provided at the lower end, the vertical pipe (41) is inserted and fixed in the connecting hole (11), and the vertical pipe (41) is provided at the bottom of the connecting pipe (4). The cavity in the tube is communicated with the cavity of the connecting tube (1); a sealing ball (42) is provided in the liquid adding cylinder (4); the sealing ball (42) blocks the upper end of the vertical tube (41) and isolates the cavity of the vertical tube (41) from the cavity of the liquid adding cylinder (4); the upper end of the liquid adding cylinder (4) is fixedly connected to an end cover (43); the upper end of the end cover (43) is fixedly connected to a guide cylinder (44); a guide hole is provided in the middle of the end cover (43); the upper end of the sealing ball (42) is fixedly connected to a transmission rod (45); the upper end of the transmission rod (45) passes through the guide hole and is fixedly connected to a guide column (46); the guide column (46) is movably connected to the guide cylinder (44) ) and is sealed with the inner wall of the guide cylinder (44), the outer diameter of the guide column (46) is larger than the outer diameter of the sealing ball (42); a first compression spring (47) is provided in the liquid adding cylinder (4), the first compression spring (47) is sleeved on the outside of the transmission rod (45), one end of the first compression spring (47) abuts against the upper surface of the sealing ball (42) and the other end abuts against the lower surface of the end cover (43); a through hole is provided on the end cover (43) for connecting the inner cavity of the liquid adding cylinder (4) with the inner cavity of the guide cylinder (44); an injection tube (5) is fixedly connected to the end cover (43), the interior of the injection tube (5) is a hollow structure and the bottom is provided with a through hole for connecting the inner cavity of the liquid adding cylinder (4) with the inner cavity of the guide cylinder (44); The inner cavity of the liquid adding cylinder (4) is connected to a liquid injection hole (51), the upper end of the liquid injection tube (5) is fixedly connected to an upper cover (52), a driving motor (53) is fixedly installed on the upper cover (52), an output shaft of the driving motor (53) passes through the upper cover (52) and is fixedly connected to a rotating rod (54), the rotating rod (54) is located in the liquid injection tube (5) and is fixedly connected to a spiral blade (55) on the outer wall, the spiral blade (55) is used to squeeze the liquid in the liquid injection tube (5) toward the liquid injection hole (51) after rotation, the upper cover (52) is provided with a liquid inlet, and the liquid inlet is fixedly connected to a liquid inlet tube (56) for providing cleaning liquid; A movable in-tube ball (411) is provided in the vertical tube (41); a second water inlet hole (412) is provided at one end of the vertical tube (41) close to the sealing ball (42); the in-tube ball (411) abuts against the second water inlet hole (412); a positioning plate (413) is connected to the middle of the vertical tube (41) by threads; a third compression spring (414) is provided between the positioning plate (413) and the in-tube ball (411); and a through hole is provided on the positioning plate (413); The upper end of the guide cylinder (44) is fixedly connected to a sealing plate (48), and a ventilation hole is provided in the middle of the sealing plate (48).

2. A pipeline cleaning liquid injection device for a heat pump water heater according to claim 1, characterized in that: The first one-way valve (2) and the second one-way valve (3) both comprise a valve body (21), the valve body (21) being provided with a valve cavity (22) penetrating the valve body (21), the valve cavity (22) being provided with a movable valve core ball (23), the valve cavity (22) being provided with a first water inlet hole (24) near the end of the internal water inlet, the valve core ball (23) abutting against the end of the first water inlet hole (24) to form a sealing fit, the middle of the valve cavity (22) being connected with a limit plate (25) by means of a thread, a second compression spring (26) being provided between the limit plate (25) and the valve core ball (23), and the limit plate (25) being provided with a through hole.

3. A pipeline cleaning liquid injection device for a heat pump water heater according to claim 2, characterized in that: The limiting plate (25) is provided with a step column (251) protruding toward one side of the valve core ball (23), and the second compression spring (26) is sleeved on the outside of the step column (251).

4. A pipeline cleaning liquid injection device for a heat pump water heater according to claim 1, characterized in that: The end of the first one-way valve (2) away from the connecting pipe (1) is threadedly connected to a first connecting joint (27), and the first connecting joint (27) is used to be connected to an end of the water heater close to the water inlet; the end of the second one-way valve (3) away from the connecting pipe (1) is threadedly connected to a second connecting joint (31), and the second connecting joint (31) is used to be connected to the water pipe of the water heater.

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