Water heater

Abstract

The invention discloses a water heater which comprises a shell, a tap water input pipeline, a hot water output pipeline, a heating heat exchanger, a condenser, a heat pump circulating system and a hot water tank. The hot water tank and the heat pump circulating system are arranged in the shell, a heat exchange space is formed in the hot water tank, and the heating heat exchanger and the condenser are both arranged in the heat exchange space; one end of the tap water input pipeline penetrates through the shell and is connected with the input end of the heating heat exchanger. One end of the hot water output pipeline penetrates through the shell and is connected with the output end of the heating heat exchanger. The input end and the output end of the condenser are connected with the heat pump circulating system through pipelines. Through the application of the air source heat pump type water heater, the heat exchange effect is good, hot water supply which is accurate in temperature control and can be output immediately after being used can be provided, the integration degree is high, the structure is simple, the occupied space is small, and manufacturing and later maintenance are convenient; and the frosting and freezing influence of a low-temperature environment on the heat exchanger can be avoided, and overall work is stable.

Description

Technical Field

[0001] The present invention relates to the technical field of hot water supply, in particular to a water heater. Background Art

[0002] At present, in order to achieve the supply of hot water for households, it is more common to use household air source heat pump water heaters, such as the existing Chinese authorized patent CN201310727726.0. Traditional air source heat pump water heaters mostly use a split wall-mounted outdoor unit plus a cylindrical water bucket, which requires a large installation space and is also relatively inconvenient during the installation process.

[0003] Furthermore, these household air-source heat pump water heaters utilize the heat pump heating mode of an air conditioner to heat the water in a cylindrical bucket to a suitable temperature for bathing. However, when the outdoor ambient temperature drops below -15°C, the heat exchanger surface of the outdoor unit will become severely frosted or frozen, rendering it inoperable. Summary of the Invention

[0004] In view of this, in order to solve the above problems, the object of the present invention is to provide a water heater, comprising: a shell, a tap water input pipeline, a hot water output pipeline, a heating heat exchanger, a condenser, a heat pump circulation system and a hot water tank;

[0005] The hot water tank and the heat pump circulation system are both arranged in the housing. A heat exchange space is formed in the hot water tank. The heating heat exchanger and the condenser are both arranged in the heat exchange space. The heat exchange space contains hot water. The heating heat exchanger and the condenser exchange heat through the hot water.

[0006] One end of the tap water input pipe passes through the shell and is connected to the input end of the heating heat exchanger, and one end of the hot water output pipe passes through the shell and is connected to the output end of the heating heat exchanger;

[0007] The input end and the output end of the condenser are both connected to the heat pump circulation system through pipelines, and the heat pump circulation system is used to circulate and supply refrigerant to the condenser.

[0008] In another preferred embodiment, the heating heat exchanger and / or the condenser is a microchannel heat exchange structure;

[0009] The microchannel heat exchange structure includes: a first access pipe, a first cavity, a second cavity, a second access pipe and a plurality of microchannel tubes, one end of the first access pipe is connected to the first cavity, the plurality of microchannel tubes are connected between the first cavity and the second cavity, the second cavity is connected to one end of the second access pipe, and a gap is formed between each adjacent microchannel tube.

[0010] In another preferred embodiment, the heat pump circulation system includes: a first pipeline, a compressor, a throttle valve and an evaporator, the first pipeline is connected between the input end and the output end of the condenser, the first pipeline is sequentially provided with the throttle valve, the evaporator and the compressor along the direction from the output end to the input end, and the compressor and the throttle valve are both arranged in the shell.

[0011] In another preferred embodiment, the heat pump circulation system further comprises: a cold water tank, an air inlet assembly, a spray plate, a shield, a fan, an air outlet assembly and a spray circulation system;

[0012] The shield and the cold water tank are both arranged in the shell, and a storage space is formed in the cold water tank, and the storage space contains a heat exchange solution;

[0013] The air outlet assembly is arranged at the upper part of the housing, and the air outlet assembly is arranged close to the fan;

[0014] The air inlet assembly is arranged at the lower part of the housing, and the air inlet assembly is arranged close to the spray piece;

[0015] The fan, the spray plate and the evaporator are arranged in sequence from top to bottom, the spray plate is arranged in the protective cover, and the evaporator is arranged in the cold water tank;

[0016] The spray circulation system is used to circulate and spray the heat exchange solution in the cold water tank onto the spray sheet.

[0017] In another preferred embodiment, the spray circulation system includes: a second pipeline, a spray head, a spray pump and a first flow switch, one end of the second pipeline is connected to the cold water tank, the other end of the second pipeline is connected to the spray head, the spray head is connected toward the spray plate, and the first flow switch and the spray pump are sequentially arranged from one end to the other end of the second pipeline.

[0018] In another preferred embodiment, the tap water input pipeline includes: a third pipeline, a hot water circulation pump, a first valve, a second flow switch and a first solenoid valve, one end of the third pipeline passes through the shell and is connected to the heating heat exchanger, and the first valve, the second flow switch, the first solenoid valve and the hot water circulation pump are arranged in sequence on the third pipeline in a direction close to the heating heat exchanger.

[0019] In another preferred embodiment, it further includes: a fourth pipeline, a second valve and a second solenoid valve, one end of the fourth pipeline passes through the shell and is connected to the third pipeline, one end of the fourth pipeline is located between the hot water circulation pump and the first solenoid valve, and the second valve and the second solenoid valve are sequentially arranged on the upper edge of the fourth pipeline near the hot water circulation pump.

[0020] In another preferred embodiment, it further includes: a fifth pipeline and a first water supply valve, one end of the fifth pipeline is connected to the third pipeline, one end of the fifth pipeline is located between the second flow switch and the first solenoid valve, the first water supply valve is connected to the other end of the fifth pipeline, and the first water supply valve is used to supply hot water for exchange to the hot water tank.

[0021] In another preferred embodiment, it further includes: a sixth pipeline and a second water supply valve, one end of the sixth pipeline is connected to the fifth pipeline, and the other end of the sixth pipeline is connected to the second water supply valve, and the second water supply valve is used to replenish the heat exchange solution to the heat pump circulation system.

[0022] In another preferred embodiment, it further comprises: a stirrer, wherein the output end of the stirrer extends into the hot water tank.

[0023] In another preferred embodiment, the outer surface of the hot water tank is surrounded by a thermal insulation layer.

[0024] In another preferred embodiment, the present invention further comprises: a first liquid level gauge, a first replenishing pipe, a first discharge pipe and a third valve;

[0025] The first liquid level gauge is provided on the housing and is used to obtain the liquid level of the hot water in the hot water tank;

[0026] The first replenishing pipe is provided at the upper portion of the housing, and the lower end of the first replenishing pipe is connected to the upper portion of the hot water tank;

[0027] One end of the first discharge pipe passes through the lower portion of the shell and is connected to the bottom of the hot water tank, and the other end of the first discharge pipe is provided with the third valve.

[0028] In another preferred embodiment, the hot water tank further comprises: an air release valve, wherein the air release valve is arranged on the upper part of the hot water tank.

[0029] In another preferred embodiment, the present invention further comprises: a second liquid level gauge, a second replenishing pipe, a second discharge pipe and a fourth valve;

[0030] The second liquid level gauge is provided on the housing, and is used to obtain the liquid level of the heat exchange solution in the cold water tank;

[0031] The second replenishing pipe is provided at the upper portion of the housing, and the lower end of the second replenishing pipe is connected to the upper portion of the shield;

[0032] One end of the second discharge pipe passes through the lower portion of the shell and is connected to the bottom of the cold water tank, and the other end of the second discharge pipe is provided with the fourth valve.

[0033] In another preferred embodiment, the hot water output pipeline includes: a seventh pipeline, a fifth valve and a third flow switch, one end of the seventh pipeline passes through the shell and is connected to the output end of the heating heat exchanger, and the fifth valve and the third flow switch are sequentially arranged on the upper edge of the seventh pipeline in the direction close to the heating heat exchanger.

[0034] In another preferred embodiment, the air inlet assembly includes at least: a second grille structure and a filter screen, the second grille structure includes a plurality of grilles arranged in sequence along the vertical direction, each grille is arranged in an inverted V-shaped structure, and the filter screen is arranged on the outside of the second grille structure.

[0035] In another preferred embodiment, a plurality of hanging holes are provided on the housing.

[0036] Due to the adoption of the above technical solution, the present invention has the following positive effects compared with the prior art:

[0037] Through the application of the present invention, an air source heat pump water heater is provided, which has a good heat exchange effect and can provide hot water supply with accurate temperature control and immediate use. It has a high degree of integration, a simple structure and occupies a small space, which is convenient for production and subsequent maintenance. At the same time, the water heater can avoid the influence of low temperature environment on frost and ice of the heat exchanger, and the overall operation is stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is an overall schematic diagram of a water heater of the present invention;

[0039] Figure 2 This is a schematic diagram of a microchannel heat exchange structure of a water heater of the present invention;

[0040] Figure 3 This is a schematic diagram of an integrated structure of a water heater of the present invention;

[0041] Figure 4 This is a schematic diagram of an air inlet assembly of a water heater of the present invention.

[0042] In the attached figure:

[0043] 1. Shell; 2. Heating heat exchanger; 3. Condenser; 4. Hot water tank; 5. First access pipe; 6. First cavity; 7. Second cavity; 8. Second access pipe; 9. Microchannel tube; 10. Outer pipe cover; 11. Inner pipe cover; 12. Connection hole; 13. Support frame; 14. Mounting hole; 15. First pipeline; 16. Compressor; 17. Throttle valve; 18. Evaporator; 19. Cold water tank; 20. Air inlet assembly; 21. Spray plate; 22. Shield; 23. Fan; 24. Air outlet assembly; 25. Second pipeline; 26. Spray head; 27. Spray pump; 28. First flow switch; 29. ​​Third pipeline; 30. Hot water circulation pump; 31. First valve; 32. Second flow switch; 33. First solenoid valve; 34. Fourth pipeline; 35. Second valve; 36. Second solenoid valve; 37. Fifth pipeline; 38. First water supply valve; 39. Sixth pipeline; 40. Second water supply valve; 41. Agitator; 42. Insulation layer; 43. First liquid level gauge; 44. First replenishing pipe; 45. First discharge pipe; 46. Third valve; 47. Air release valve; 48. Second liquid level gauge; 49. Second replenishing pipe; 50. Second discharge pipe; 51. Fourth valve; 52. Seventh pipeline; 53. Fifth valve; 54. Third flow switch; 55. Second grille structure; 56. Filter; 57. Grid; 58. Hanging hole; 59. Air guide ring. DETAILED DESCRIPTION

[0044] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0045] In the description of the present invention, it should be understood that the orientations or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “inside”, “outside”, “front”, “back”, “horizontal” and “vertical” are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or component referred to must have a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0046] It should be noted that the terms “horizontal” and “vertical” in the present invention are used to illustrate a rough positional relationship, rather than a strict “horizontal plane” or “vertical plane”.

[0047] like Figure 1As shown, a water heater of a preferred embodiment is shown, comprising: a shell 1, a tap water input pipeline, a hot water output pipeline, a heating heat exchanger 2, a condenser 3, a heat pump circulation system and a hot water tank 4; the hot water tank 4 and the heat pump circulation system are both arranged in the shell 1, a heat exchange space is formed in the hot water tank 4, the heating heat exchanger 2 and the condenser 3 are both arranged in the heat exchange space, the heat exchange space is filled with hot water, and the heating heat exchanger 2 and the condenser 3 exchange heat through the hot water; one end of the tap water input pipeline passes through the shell 1 and is connected to the input end of the heating heat exchanger 2, and one end of the hot water output pipeline passes through the shell 1 and is connected to the output end of the heating heat exchanger 2; the input end and the output end of the condenser 3 are both connected to the heat pump circulation system through pipelines, and the heat pump circulation system is used to circulate a refrigerant to the condenser 3. Furthermore, when the water heater is working, tap water enters the heating heat exchanger 2 located in the hot water tank 4 through the tap water inlet pipe, and the tap water is heated to the same or close temperature as the hot water in the hot water tank 4 through heat transfer between the hot water in the hot water tank 4 and the heating heat exchanger 2, and then output to the domestic hot water pipe through the hot water output pipe. The domestic hot water pipe can be part of the water pipe of a shower or a domestic hot water faucet. The heat pump circulation system and the condenser 3 are used together to provide a refrigerant with suitable flow and state and generate heat supply at the condenser 3 that can be transferred to the hot water in the hot water tank 4 to heat the hot water, thereby providing hot water at the shower or the domestic hot water faucet.

[0048] like Figure 2 As shown, further, as a preferred embodiment, the heating heat exchanger 2 and / or the condenser 3 is a microchannel heat exchange structure; the microchannel heat exchange structure includes: a first access pipe 5, a first cavity 6, a second cavity 7, a second access pipe 8 and a plurality of microchannel tubes 9, one end of the first access pipe 5 is connected to the first cavity 6, the plurality of microchannel tubes 9 are connected between the first cavity 6 and the second cavity 7, the second cavity 7 is connected to one end of the second access pipe 8, and a gap is formed between each adjacent microchannel tube 9. Furthermore, when the microchannel heat exchange structure is used as a heating heat exchanger 2, tap water is contained in the first cavity 6 and the second cavity 7, the first access pipe 5 is connected to the hot water output pipeline, and the second access pipe 8 is connected to the tap water input pipeline; when the microchannel heat exchange structure is used as a condenser 3, the first cavity 6 is filled with gaseous refrigerant, the second cavity 7 is filled with liquid refrigerant, the first access pipe 5 is connected to the exhaust port of the compressor 16 of the heat pump circulation system, and the second access pipe 8 is connected to the throttle valve 17 of the heat pump circulation system.

[0049] Furthermore, as a preferred embodiment, each microchannel tube 9 is provided as a mutually independent tube structure, and a plurality of tube structures together form a tube bundle arranged in an array; or Figure 3As shown, several micro-channel tubes 9 can be an integrally formed structure. Several micro-channel tubes 9 are provided on the integrally formed structure. A plurality of the above-mentioned integrally formed structures can be provided.

[0050] Furthermore, as a preferred embodiment, the above-mentioned tube structure can preferably be a concentric capillary tube with an inner diameter not greater than 1 mm; it can be made of materials such as copper, titanium and titanium alloy, and pressure-resistant alloy steel.

[0051] Furthermore, as a preferred embodiment, the number of microchannel tubes 9 can be selected according to actual use requirements to meet different hot water flow requirements.

[0052] Furthermore, as a preferred embodiment, the above-mentioned one-piece structure can be formed by extrusion of profiles; it can be made of materials such as aluminum alloy.

[0053] Furthermore, as a preferred embodiment, the first cavity 6 and the second cavity 7 both include: an outer tube cover 10 and an inner tube cover 11, the outer tube cover 10 is connected to the first access tube 5 or the second access tube 8, and a plurality of connecting holes 12 are opened on the inner tube cover 11, each connecting hole 12 is connected to a microchannel tube 9, and an accommodating space is formed between the outer tube cover 10 and the inner tube cover 11.

[0054] Furthermore, as a preferred embodiment, the outer tube cover 10 and the inner tube cover 11 both have annular walls extending toward each other, and the annular walls of the outer tube cover 10 and the inner tube cover 11 are connected to each other.

[0055] Furthermore, as a preferred embodiment, the microchannel heat exchange structure further includes: at least one support frame 13, the support frame 13 having a plurality of mounting holes 14, and each microchannel tube 9 is installed through a mounting hole 14. Furthermore, the position of adjacent microchannel tubes 9 is stabilized by the arrangement of the support frame 13.

[0056] Furthermore, as a preferred embodiment, the plurality of connection holes 12 on the inner tube cover 11 and the plurality of mounting holes 14 on the support frame 13 are arranged in a uniform array. Furthermore, the uniform array is preferably arranged in a circular array.

[0057] Furthermore, as a preferred embodiment, a plurality of support frames 13 are sequentially arranged along the axial direction of the microchannel tube 9 .

[0058] Furthermore, as a preferred embodiment, the outer tube cover 10 and the inner tube cover 11, as well as the support frame 13 and the microchannel tube 9 can be sealed by brazing, argon arc welding or laser welding.

[0059] Furthermore, as a preferred embodiment, the heat pump circulation system includes: a first pipeline 15, a compressor 16, a throttle valve 17 and an evaporator 18. The first pipeline 15 is connected between the input end and the output end of the condenser 3. The first pipeline 15 is sequentially provided with the throttle valve 17, the evaporator 18 and the compressor 16 in the direction from the output end to the input end. The compressor 16 and the throttle valve 17 are both provided in the housing 1. Furthermore, Figure 1 The arrow in the figure indicates the flow direction of the refrigerant. The refrigerant in the corresponding state leaves the output end of the condenser 3 and passes through the throttle valve 17, the evaporator 18 and the compressor 16 in sequence, and then returns to the condenser 3, thereby completing a heat exchange cycle. When the water temperature in the hot water tank 4 drops below the set temperature of 2°C, the heat pump circulation system starts to operate and heats the exchange water in the hot water tank 4. When the temperature of the exchange water in the hot water tank 4 is higher than the set temperature of 2°C, the heat pump circulation system stops running.

[0060] Furthermore, as a preferred embodiment, a temperature sensor can be used to detect the above-mentioned temperature. The temperature sensor can be set in the hot water tank 4 or on the hot water output pipeline.

[0061] Furthermore, as a preferred embodiment, evaporator 18 is a microchannel heat exchange structure. Furthermore, when the microchannel heat exchange structure serves as evaporator 18, first cavity 6 contains a gaseous refrigerant, second cavity 7 contains a gas-liquid two-phase refrigerant, first access pipe 5 is connected to the return air port of compressor 16 of the heat pump circulation system, and second access pipe 8 is connected to the throttle valve 17 of the heat pump circulation system.

[0062] Furthermore, as a preferred embodiment, the heat pump circulation system also includes: a cold water tank 19, an air inlet assembly 20, a spray plate 21, a shield 22, a fan 23, an air outlet assembly 24 and a spray circulation system; the shield 22 and the cold water tank 19 are both arranged in the shell 1, and a storage space is formed in the cold water tank 19, and the storage space contains a heat exchange solution; the air outlet assembly 24 is arranged at the upper part of the shell 1, preferably at the top surface of the shell 1, and the air outlet assembly 24 is arranged close to the fan 23; the air inlet assembly 20 is arranged at the lower part of the shell 1, preferably at the lower position of the right side of the shell 1, and the air inlet assembly 20 is arranged close to the spray plate 21; the fan 23, the spray plate 21 and the evaporator 18 are arranged in sequence from top to bottom, the spray plate 21 is arranged in the shield 22, and the evaporator 18 is arranged in the cold water tank 19; the spray circulation system is used to circulate the heat exchange solution in the cold water tank 19 and spray it onto the spray plate 21. Furthermore, by setting the evaporator 18 in the cold water tank 19, the heat exchange solution in the cold water tank 19 is cooled when the water heater is working, and the sprayed heat exchange solution is heated to a temperature close to that of the atmosphere under the cooperation of the spray circulation system. Specifically, the heat exchange solution in the cold water tank 19 is transported to the top of the spray plate 21 by the spray circulation system and falls freely, and returns to the cold water tank 19 after passing through the spray plate 21. At the same time, under the action of the fan 23, the external air is sucked in from the air inlet component 20 and continues to move upward after passing through the heat exchange solution at the spray plate 21, and finally leaves the shell 1 from the disposal component 24 driven by the fan 23; wherein, the spray plate 21 is surrounded by the inner side of the protective cover 22, and the protective cover 22 is used to provide a range for limiting the movement of the heat exchange solution, and the inner wall of the protective cover 22 can also be passed by the heat exchange solution and can be in contact with the air for heat exchange; the spray plate 21 has a sufficiently large surface area to increase the heat exchange area and heat exchange time between the heat exchange solution and the atmosphere.

[0063] Furthermore, as a preferred embodiment, the heat exchange solution is preferably an ethylene glycol solution, and the concentration of the heat exchange solution can be adjusted according to the local minimum atmospheric temperature.

[0064] Furthermore, as a preferred embodiment, the cold water tank 19 is preferably made of stainless steel.

[0065] Furthermore, as a preferred embodiment, the spray circulation system includes: a second pipeline 25, a spray head 26, a spray pump 27 and a first flow switch 28, one end of the second pipeline 25 is connected to the cold water tank 19, the other end of the second pipeline 25 is connected to the spray head 26, the spray head 26 is connected toward the spray plate 21, and the first flow switch 28 and the spray pump 27 are sequentially arranged from one end to the other end of the second pipeline 25. Furthermore, the spray head 26 sprays the heat exchange solution on the spray plate 21 under the power supply of the spray pump 27 and forms a uniform water film on the spray plate 21, and flows downward along the spray plate 21 into the cold water tank 19; the first flow switch 28 is used to detect the flow of the heat exchange solution in the second pipeline 25. When the first flow switch 28 is still not closed after the spray pump 27 has been running for 5 seconds, that is, no heat exchange solution passes through, the compressor 16, the fan 23, the spray pump 27, etc. all stop running, and an alarm message is issued that the heat exchange solution is frozen or there is no heat exchange solution in the cold water tank 19.

[0066] Furthermore, as a preferred embodiment, the tap water input pipeline includes: a third pipeline 29, a hot water circulation pump 30, a first valve 31, a second flow switch 32, and a first solenoid valve 33. One end of the third pipeline 29 passes through the housing 1 and is connected to the heating heat exchanger 2. The first valve 31, the second flow switch 32, the first solenoid valve 33, and the hot water circulation pump 30 are sequentially arranged on the third pipeline 29 in a direction approaching the heating heat exchanger 2. Furthermore, the hot water circulation pump 30 can be selectively closed or opened when introducing external tap water. When closed, it allows tap water to continue to flow through the hot water circulation pump 30 into the heating heat exchanger 2 under the water network pressure. When opened, it can provide a certain amount of auxiliary power. In addition, the hot water circulation pump 30 can also circulate hot water without the introduction of new tap water by additionally connecting to the domestic hot water pipeline.

[0067] Furthermore, as a preferred embodiment, the system further includes: a fourth pipe 34, a second valve 35, and a second solenoid valve 36. One end of the fourth pipe 34 passes through the housing 1 and is connected to the third pipe 29. One end of the fourth pipe 34 is located between the hot water circulation pump 30 and the first solenoid valve 33. The second valve 35 and the second solenoid valve 36 are sequentially provided on the upper edge of the fourth pipe 34 near the hot water circulation pump 30. Furthermore, when no water is flowing from the shower or domestic hot water faucet, the hot water circulation pump 30 operates for a certain period of time according to a certain cycle. The operating cycle is the time during which the water temperature in the domestic hot water pipe drops by no more than 2°C. In this way, the hot water can complete two cycles of flowing from the hot water tank 4 to the domestic hot water pipe and then back into the hot water tank 4 in the shortest operating time. That is, the provision of the hot water circulation pump 30 allows the domestic hot water pipe to flow out when the shower or domestic hot water faucet is opened. Furthermore, a temperature sensor is installed at the hot water output pipeline, i.e., the seventh pipeline 52, to detect the outlet water temperature. When the outlet water temperature falls below the set temperature, the heat pump circulation system is immediately activated for heating. When the hot water circulation pump 30 is operating, the second solenoid valve 36 can be opened and the first solenoid valve 33 closed to prevent the introduction of new tap water. When the shower or domestic hot water faucet is turned on, the hot water circulation pump 30 can be optionally turned off, the second solenoid valve 36 closed, and the hot water itself can no longer circulate. The first solenoid valve 33 is opened to allow tap water to be introduced. In addition, if the first solenoid valve 33 is open and the second flow switch 32 is not closed, all pumps, compressor 16, fan 23, etc. of the water heater immediately stop operating, and the water heater alarm message indicates that there is no tap water.

[0068] Furthermore, as a preferred embodiment, the hot water tank 4 is further provided with a fifth pipe 37 and a first water supply valve 38. One end of the fifth pipe 37 is connected to the third pipe 29 and is located between the second flow switch 32 and the first solenoid valve 33. The first water supply valve 38 is connected to the other end of the fifth pipe 37. The first water supply valve 38 is used to supply hot water for exchange to the hot water tank 4. Furthermore, tap water from the tap water input pipe can be added to the hot water tank 4 through the fifth pipe 37 and the first water supply valve 38.

[0069] Furthermore, as a preferred embodiment, the system further includes a sixth pipe 39 and a second water replenishment valve 40. One end of the sixth pipe 39 is connected to the fifth pipe 37, and the other end of the sixth pipe 39 is connected to the second water replenishment valve 40. The second water replenishment valve 40 is used to replenish the heat exchange solution to the heat pump circulation system. Furthermore, by opening the second water replenishment valve 40, tap water can be replenished into the cold water tank 19 through the sixth pipe 39.

[0070] Furthermore, as a preferred embodiment, it further includes: an agitator 41, the output end of the agitator 41 is extended into the hot water tank 4. Furthermore, through the periodic operation of the agitator 41, the convection of the heated water in the hot water tank 4 is enhanced, thereby quickly maintaining the temperature of the heated water.

[0071] Furthermore, as a preferred embodiment, the outer surface of the hot water tank 4 is surrounded by a heat-insulating layer 42. Furthermore, the heat-insulating layer 42 is provided around the outer surface of the entire hot water tank to reduce the temperature loss of the hot water in the hot water tank 4.

[0072] Furthermore, as a preferred embodiment, the system further includes: a first liquid level gauge 43, a first replenishing pipe 44, a first discharge pipe 45, and a third valve 46. The first liquid level gauge 43 is disposed on the housing 1 and is used to measure the liquid level of the hot water in the hot water tank 4. The first replenishing pipe 44 is disposed at the upper portion of the housing 1, with its lower end connected to the upper portion of the hot water tank 4. One end of the first discharge pipe 45 passes through the lower portion of the housing 1 and is connected to the bottom of the hot water tank 4. The other end of the first discharge pipe 45 is provided with a third valve 46. Furthermore, the liquid level of the hot water in the hot water tank 4 can be measured using the first liquid level gauge 43, and purified water or soft water can be added through the first replenishing pipe 44 based on the liquid level. During subsequent maintenance, the water heater power supply can be turned off, and the third valve 46 can be opened to allow the hot water in the hot water tank 4 to be discharged through the first discharge pipe 45, thereby facilitating cleaning of the inner wall of the hot water tank 4.

[0073] Furthermore, as a preferred embodiment, it further includes: an air release valve 47, which is arranged at the upper part of the hot water tank 4. Furthermore, when the hot water in the hot water tank 4 is heated, a certain amount of steam will be generated, and the air release valve 47 can automatically discharge the steam to avoid excessive pressure.

[0074] Furthermore, as a preferred embodiment, the system further includes: a second liquid level gauge 48, a second replenishing pipe 49, a second discharge pipe 50, and a fourth valve 51. The second liquid level gauge 48 is disposed on the housing 1 and is used to measure the liquid level of the heat exchange solution in the cold water tank 19. The second replenishing pipe 49 is disposed at the upper portion of the housing 1, and the lower end of the second replenishing pipe 49 is connected to the upper portion of the protective cover 22. One end of the second discharge pipe 50 passes through the lower portion of the housing 1 and is connected to the bottom of the cold water tank 19. The other end of the second discharge pipe 50 is provided with a fourth valve 51. Furthermore, the liquid level of the heat exchange solution in the cold water tank 19 can be measured using the second liquid level gauge 48, and ethylene glycol solution can be added through the second replenishing pipe 49 based on the liquid level. During subsequent maintenance, the power supply of the water heater can be turned off, and the fourth valve 51 can be opened to allow the heat exchange solution in the cold water tank 19 to be discharged through the second discharge pipe 50, thereby facilitating cleaning of the inner wall of the cold water tank 19.

[0075] Furthermore, as a preferred embodiment, the hot water output pipeline includes: a seventh pipeline 52, a fifth valve 53, and a third flow switch 54. One end of the seventh pipeline 52 passes through the housing 1 and is connected to the output end of the heating heat exchanger 2. The fifth valve 53 and the third flow switch 54 are sequentially arranged along the seventh pipeline 52 in a direction closer to the heating heat exchanger 2. Furthermore, when a shower or domestic hot water faucet is turned on, the third flow switch 54 detects a decrease in flow (i.e., the third flow switch 54 is disconnected), immediately shutting off the hot water circulation pump 30 and the second solenoid valve 36, and opening the first solenoid valve 33 to rapidly supply tap water. Then, when the third flow switch 54 detects no flow in the seventh pipeline 52, it closes the first solenoid valve 33, restarting the hot water cycle in the domestic hot water pipeline.

[0076] like Figure 4 As shown, further, as a preferred embodiment, the air inlet assembly 20 includes at least: a second grille structure 55 and a filter 56. The second grille structure 55 includes a plurality of grilles 57 arranged in sequence along the vertical direction, each grille 57 being arranged in an inverted V-shaped structure. The filter 56 is arranged on the outside of the second grille structure 55. Furthermore, the height of the air inlet assembly 20 is greater than the height of the cold water tank 19 and is arranged directly opposite the spray plate 21. The inverted V-shaped arrangement allows the side of the grille 57 closer to the interior to prevent the heat exchange solution from splashing outward and prevent dust or water droplets on the outside of the housing 1 from entering the housing 1.

[0077] Furthermore, as a preferred embodiment, the air inlet assembly 20 and the air outlet assembly 24 are both embedded in the housing 1 through-out.

[0078] The above descriptions are merely preferred embodiments of the present invention and are not intended to limit the implementation and protection scope of the present invention.

[0079] The present invention also has the following implementation modes based on the above:

[0080] In a further embodiment of the present invention, the housing 1 is provided with a plurality of mounting holes 58. Furthermore, the water heater can be hung on a balcony or on a ventilated indoor wall via the mounting holes 58. The lower end of the housing 1 is maintained at a certain distance from the ground, and the fan 23 is at least 0.3 meters above the roof.

[0081] In a further embodiment of the present invention, four hanging holes 58 are preferably provided and arranged in a rectangular array on the back side of the housing 1 .

[0082] In a further embodiment of the present invention, the back of the housing 1 may be formed with a flat portion to facilitate matching with a wall, or to facilitate connection by attaching an additional mounting bracket.

[0083] In a further embodiment of the present invention, an annular air guide ring 59 is provided at the lower edge of the air outlet assembly 24. The air guide ring 59 is arranged in a downwardly extending manner. Furthermore, the provision of the air guide ring 59 allows the air within the housing 1 to be properly directed upward. The radial inner profile of the air guide ring is at least partially configured to gradually decrease from top to bottom.

[0084] In a further embodiment of the present invention, the second grid structure 55 is preferably made of plastic injection molding.

[0085] In a further embodiment of the present invention, the filter screen 56 is preferably made of PP resin material.

[0086] In a further embodiment of the present invention, a plurality of spray heads 26 may be provided, and the spray plate 21 may be provided in a rectangular plate structure. The plurality of spray heads 26 are sequentially provided above the spray plate 21 along the width direction.

[0087] In a further embodiment of the present invention, the spray sheet 21 may preferably be a diagonally staggered polyvinyl chloride filler sheet used in a conventional cooling tower.

[0088] In a further embodiment of the present invention, the shield 22 is preferably made of stainless steel.

[0089] In a further embodiment of the present invention, the shield 22 is provided in a cylindrical structure extending in a vertical direction and open at the top and bottom. The lower end of the shield 22 can be sealedly connected to the upper end of the cold water tank 19.

[0090] In a further embodiment of the present invention, the air outlet assembly 24 at least includes: a first grille structure. Furthermore, a filter may be attached to the upper end of the first grille structure.

[0091] In a further embodiment of the present invention, corresponding openings are provided on the housing 1 at the locations where the second grid structure 55 and the first grid structure are provided, so as to enable corresponding embedded installation.

[0092] In a further embodiment of the present invention, the opening corresponding to the second grid structure 55 can be formed by extending the portion of the housing 1 at the inner edge of the opening inward to form an edge surface perpendicular to the axial direction of the opening, so as to form an installation limit for the second grid structure 55 .

[0093] In a further embodiment of the present invention, the refrigerant is preferably R744 carbon dioxide refrigerant.

[0094] In a further embodiment of the present invention, the compressor 16, the hot water circulation pump 30 and the spray pump 27 are all located in the lower part of the housing 1, so that the center of gravity of the entire water heater is relatively low to ensure stability during installation and transportation.

[0095] In a further embodiment of the present invention, the compressor 16 is preferably a variable frequency compressor 16. Furthermore, by selecting the variable frequency compressor 16, the power consumption caused by frequent startup is reduced.

[0096] In a further embodiment of the present invention, the housing 1 is configured as a cylindrical structure as a whole.

[0097] In a further embodiment of the present invention, the lower portion of the shell 1 can be partially opened, and a horizontally extending partition is provided on the inner side of the opening. The pump of the water heater and part of the pipes and valves can be provided below the partition for easy inspection and maintenance, and the above-mentioned pump and part of the pipes and valves can still be mostly surrounded by the inner side of the lower end of the shell 1, so as to maintain beauty and avoid dust.

[0098] In a further embodiment of the present invention, the housing 1 is preferably made of carbon steel.

[0099] In a further embodiment of the present invention, the outer surface of the housing 1 is covered with a spray paint and resin powder coating to protect the housing 1 from corrosion and rust.

[0100] In a further embodiment of the present invention, the capacity of the hot water exchanged in the hot water tank 4 should at least meet the heating requirement of the hot water output for 2 minutes when the hot water output pipeline is in a normal state.

[0101] In a further embodiment of the present invention, the connection parts between the tap water input pipeline and the hot water output pipeline and the outside world may be provided with two parallel branches, each branch may be provided with corresponding valves and sensors, etc., and the two branches extend left and right in the horizontal direction respectively to provide suitable positions relative to the shell 1; in actual use, one of the left or right branches is generally selected for connection, and the other unconnected branch can be blocked by a blocking cover or the like and be in a non-use state.

[0102] Furthermore, as a preferred embodiment, the hot water in the hot water tank 4 is preferably pure water or soft water.

[0103] In a further embodiment of the present invention, when the water heater is in operation, the spray pump 27 and the fan 23 are preferably pre-started 10 seconds before the compressor 16 is started, and stopped 20 seconds after the compressor 16 stops.

[0104] Furthermore, as a preferred embodiment, the first liquid level gauge 43 and / or the second liquid level gauge 48 may be a liquid level gauge with a visual function and / or a sensor communication function, thereby effectively obtaining the corresponding liquid level.

[0105] The above description is only a preferred embodiment of the present invention and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A water heater, characterized in that: include: Shell, tap water input pipeline, hot water output pipeline, heating heat exchanger, condenser, heat pump circulation system and hot water tank; The hot water tank and the heat pump circulation system are both arranged in the housing. A heat exchange space is formed in the hot water tank. The heating heat exchanger and the condenser are both arranged in the heat exchange space. The heat exchange space contains hot water. The heating heat exchanger and the condenser exchange heat through the hot water. One end of the tap water input pipe passes through the shell and is connected to the input end of the heating heat exchanger, and one end of the hot water output pipe passes through the shell and is connected to the output end of the heating heat exchanger; The input end and the output end of the condenser are both connected to the heat pump circulation system through pipelines, and the heat pump circulation system is used to circulate and supply refrigerant to the condenser.

2. The water heater according to claim 1, characterized in that The heating heat exchanger and / or the condenser is a microchannel heat exchange structure; The microchannel heat exchange structure includes: a first access pipe, a first cavity, a second cavity, a second access pipe and a plurality of microchannel tubes, one end of the first access pipe is connected to the first cavity, the plurality of microchannel tubes are connected between the first cavity and the second cavity, the second cavity is connected to one end of the second access pipe, and a gap is formed between each adjacent microchannel tube.

3. The water heater according to claim 1, wherein: The heat pump circulation system includes: a first pipeline, a compressor, a throttle valve and an evaporator. The first pipeline is connected between the input end and the output end of the condenser. The first pipeline is sequentially provided with the throttle valve, the evaporator and the compressor along the direction from the output end to the input end. The compressor and the throttle valve are both arranged in the shell.

4. The water heater according to claim 2, characterized in that The heat pump circulation system also includes: a cold water tank, an air inlet component, a spray plate, a shield, a fan, an air outlet component and a spray circulation system; The shield and the cold water tank are both arranged in the shell, and a storage space is formed in the cold water tank, and the storage space contains a heat exchange solution; The air outlet assembly is arranged at the upper part of the housing, and the air outlet assembly is arranged close to the fan; The air inlet assembly is arranged at the lower part of the shell, and the air inlet assembly is arranged close to the spray plate; the fan, the spray plate and the evaporator are arranged in sequence from top to bottom, the spray plate is arranged in the shield, and the evaporator is arranged in the cold water tank; The spray circulation system is used to circulate and spray the heat exchange solution in the cold water tank onto the spray sheet.

5. The water heater according to claim 4, characterized in that The spray circulation system includes: a second pipeline, a spray head, a spray pump and a first flow switch, one end of the second pipeline is connected to the cold water tank, the other end of the second pipeline is connected to the spray head, the spray head is connected toward the spray plate, and the first flow switch and the spray pump are sequentially arranged from one end to the other end of the second pipeline.

6. The water heater according to claim 1, characterized in that The tap water input pipeline includes: a third pipeline, a hot water circulation pump, a first valve, a second flow switch and a first solenoid valve. One end of the third pipeline passes through the shell and is connected to the heating heat exchanger. The first valve, the second flow switch, the first solenoid valve and the hot water circulation pump are arranged in sequence on the third pipeline along the direction close to the heating heat exchanger.

7. The water heater according to claim 6, characterized in that Also includes: A fourth pipeline, a second valve and a second solenoid valve, one end of the fourth pipeline passes through the shell and is connected to the third pipeline, one end of the fourth pipeline is between the hot water circulation pump and the first solenoid valve, and the second valve and the second solenoid valve are sequentially arranged on the upper edge of the fourth pipeline near the hot water circulation pump.

8. The water heater according to claim 7, characterized in that Also includes: A fifth pipeline and a first water supply valve, one end of the fifth pipeline is connected to the third pipeline, one end of the fifth pipeline is located between the second flow switch and the first solenoid valve, the first water supply valve is connected to the other end of the fifth pipeline, and the first water supply valve is used to supply hot water for exchange to the hot water tank.

9. The water heater according to claim 8, characterized in that Also includes: A sixth pipeline and a second water supply valve, one end of the sixth pipeline is connected to the fifth pipeline, and the other end of the sixth pipeline is connected to the second water supply valve, and the second water supply valve is used to replenish heat exchange solution to the heat pump circulation system.

10. The water heater according to claim 1, wherein Also includes: A stirrer, wherein the output end of the stirrer extends into the hot water tank.

11. The water heater according to claim 1, wherein The outer surface of the hot water tank is surrounded by a heat-insulating layer.

12. The water heater according to claim 1, wherein Also includes: a first liquid level gauge, a first replenishing pipe, a first discharge pipe, and a third valve; The first liquid level gauge is provided on the housing and is used to obtain the liquid level of the hot water in the hot water tank; The first replenishing pipe is provided at the upper portion of the housing, and the lower end of the first replenishing pipe is connected to the upper portion of the hot water tank; One end of the first discharge pipe passes through the lower portion of the shell and is connected to the bottom of the hot water tank, and the other end of the first discharge pipe is provided with the third valve.

13. The water heater according to claim 1, wherein Also includes: An air release valve is provided on the upper portion of the hot water tank.

14. The water heater according to claim 4, characterized in that Also includes: a second liquid level gauge, a second replenishing pipe, a second discharge pipe, and a fourth valve; The second liquid level gauge is provided on the housing, and is used to obtain the liquid level of the heat exchange solution in the cold water tank; The second replenishing pipe is provided at the upper portion of the housing, and the lower end of the second replenishing pipe is connected to the upper portion of the shield; One end of the second discharge pipe passes through the lower portion of the shell and is connected to the bottom of the cold water tank, and the other end of the second discharge pipe is provided with the fourth valve.

15. The water heater according to claim 1, wherein The hot water output pipeline includes: a seventh pipeline, a fifth valve and a third flow switch. One end of the seventh pipeline passes through the shell and is connected to the output end of the heating heat exchanger. The fifth valve and the third flow switch are sequentially arranged on the upper edge of the seventh pipeline in the direction close to the heating heat exchanger.

16. The water heater according to claim 4, characterized in that The air inlet assembly includes at least: a second grille structure and a filter screen. The second grille structure includes a plurality of grille plates arranged in sequence along the vertical direction, each grille plate is arranged in an inverted V-shaped structure, and the filter screen is arranged on the outside of the second grille structure.

17. The water heater according to claim 1, wherein A plurality of hanging holes are provided on the shell.

Images