A frost-free air energy heat pump water heater system

Abstract

The utility model relates to the technical field of water heaters, and in particular to a frost-free air energy heat pump water heater system, comprising: an external unit installed outdoors, a hot water tank installed indoors, the external unit comprising: a support platform, an external machine housing is fixedly installed on the top of the support platform, and an inner housing is fixedly installed on the top of the support platform and inside the external machine housing. The utility model, by designing a return branch pipe and a spiral pipe installed on the return branch pipe, can remove frost at the evaporator in winter by circulating hot water in the hot water tank and the heat exchanger, so as to ensure the normal use of the equipment in winter.

Description

Technical Field

[0001] The utility model relates to the technical field of water heaters, in particular to a frost-free air energy heat pump water heater system. Background Art

[0002] The air-source water heater uses refrigerant to obtain heat from the air, and after being compressed by the compressor, heats the cold water in the heat exchanger. It relies on less electrical energy to drive the compressor to heat the cold water, and has the advantages of energy saving and high efficiency. It has been widely used.

[0003] In winter, when the outdoor temperature is low, the evaporator is prone to ice and frost, which makes the water heater unable to be used normally, affecting the user experience. For this reason, the utility model provides a frost-free air energy heat pump water heater system. Summary of the invention

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a frost-free air energy heat pump water heater system.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A frost-free air energy heat pump water heater system, comprising:

[0007] An outdoor unit installed outdoors;

[0008] A hot water tank installed indoors, the hot water tank is used to supply hot water to users, and the external unit is connected to the hot water tank through a pipeline;

[0009] The external unit comprises:

[0010] A support platform, an outer housing is fixedly mounted on the top of the support platform, an inner housing is fixedly mounted on the top of the support platform and inside the outer housing, the bottom end of the inner housing is open, and a mounting opening is provided at the bottom of the support platform and at a position corresponding to the bottom end opening of the inner housing, and an inner side of the outer housing and an outer side of the inner housing form an airflow chamber;

[0011] A heat exchanger, wherein the heat exchanger is fixedly mounted on the inner side of the inner shell;

[0012] A spoiler fan assembly, wherein the spoiler fan assembly is fixedly mounted on the top of the outer housing;

[0013] A compressor, the compressor is located inside the airflow chamber and fixedly mounted on the top of the inner shell;

[0014] A gas-liquid separator, the gas-liquid separator is fixedly mounted on the outer side of the inner shell;

[0015] An evaporator, the evaporator being mounted on the inner wall of the outer casing;

[0016] A spiral tube, which is arranged on the outside of the spoiler fan assembly and is fixedly connected to the inner top of the outer casing;

[0017] The air outlet of the compressor is connected to a four-way valve through a pipeline, the four-way valve is connected to a heat exchanger, an evaporator, and a gas-liquid separator through a pipeline, the gas-liquid separator is connected to the compressor through a pipeline, the heat exchanger is connected to an electronic expansion valve through a pipeline, and the air outlet of the electronic expansion valve is connected to the evaporator through a pipeline;

[0018] A two-way circulation pipe is connected between the hot water tank and the heat exchanger. A pump body is installed on one pipe in the two-way circulation pipe. The liquid outlet of the pump body is connected to a reflux branch pipe through a tee. The solution in the reflux branch pipe refluxes into the heat exchanger. The spiral pipe is arranged in series on the reflux branch pipe.

[0019] Preferably, a first valve body is provided on the reflux branch pipe, a drainage pipeline is connected to the reflux branch pipe, and a second valve body is provided on the drainage pipeline.

[0020] Preferably, the outer casing is a cubic structure, one side of the outer casing is an opening and is provided with a cover plate, and the other three sides of the outer casing are porous plates.

[0021] Preferably, the copper tubes of the evaporator are distributed on the inner side of the porous plate of the outer casing.

[0022] Preferably, the inner shell is a frustum-shaped shell, and the bottom end surface of the inner shell is the same size as the bottom end surface of the outer shell.

[0023] Preferably, the outer casing comprises: an embedded cover and a fan, wherein the embedded cover is fixedly installed in a reserved installation on the top of the outer casing, and air holes are provided on the side and bottom of the embedded cover, and the fan is fixedly installed inside the embedded cover.

[0024] The utility model has the following beneficial effects:

[0025] Compared with the prior art, this frost-free air energy heat pump water heater system, by designing a return branch and a spiral tube installed on the return branch, can, in winter, utilize the hot water circulation in the hot water tank and the heat exchanger to flow part of the hot water through the spiral tube, thereby removing frost at the evaporator and ensuring the normal use of the equipment in winter.

[0026] Compared with the prior art, this frost-free air energy heat pump water heater system is designed with a turbulent fan assembly. When the evaporator cannot self-heat well, the turbulent fan assembly sends external gas into the airflow chamber. On the one hand, it can directly dissipate heat for the compressor. On the other hand, it increases the air pressure inside the airflow chamber, so that the airflow passes through the evaporator faster and the heat exchange efficiency is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of a frost-free air energy heat pump water heater system proposed by the utility model;

[0028] Figure 2 A first-view stereoscopic schematic diagram of an external unit of a frost-free air energy heat pump water heater system proposed by the utility model;

[0029] Figure 3 A second perspective stereoscopic schematic diagram of an external unit of a frost-free air energy heat pump water heater system proposed by the utility model;

[0030] Figure 4 This is a front view of an outer unit of a frost-free air energy heat pump water heater system proposed by the utility model.

[0031] Legend:

[0032] 1. External housing; 2. Support platform; 3. Internal housing; 4. Turbine fan assembly; 41. Embedded cover; 42. Fan; 5. Evaporator; 6. Compressor; 7. Heat exchanger; 8. Gas-liquid separator; 9. Electronic expansion valve; 10. Four-way valve; 11. Hot water tank; 12. Pump body; 13. Spiral tube; 14. Drainage pipeline. DETAILED DESCRIPTION

[0033] Reference Figure 1 - Figure 4 The utility model provides a frost-free air energy heat pump water heater system, comprising: an external unit installed outdoors and a hot water tank 11 installed indoors; the hot water tank 11 is used to supply hot water to users, the external unit is connected to the hot water tank 11 through a pipeline, the external unit obtains heat from the air outdoors, and performs heat exchange with the hot water tank 11, thereby heating the cold water inside the hot water tank 11.

[0034] Specifically, the external unit includes: a support platform 2 , an external machine casing 1 , an inner casing 3 , a heat exchanger 7 , a turbulent fan assembly 4 , a compressor 6 , a gas-liquid separator 8 , an evaporator 5 , and a spiral tube 13 .

[0035] The outer casing 1 is fixedly installed on the top of the support platform 2. The bottom of the support platform 2 has four legs for lifting and supporting the outer casing 1. The inner casing 3 is fixedly installed on the top of the support platform 2 and located inside the outer casing 1. The bottom end of the inner casing 3 is open, and the bottom of the support platform 2 and the corresponding position of the bottom end opening of the inner casing 3 are provided with a mounting opening, so that the heat exchanger 7 can be inserted upward from the mounting opening into the inner side of the inner casing 3. The inner side of the inner casing 3 can also be provided with thermal insulation cotton to play a role in heat preservation. The inner side of the outer casing 1 and the outer side of the inner casing 3 form an airflow chamber, and the heat exchanger 7 is fixedly installed on the inner side of the inner casing 3. Figure 3 As shown in the figure, the push plate is first fixed on the outside of the heat exchanger 7. After the heat exchanger 7 is inserted into the inner side of the inner shell 3 from the bottom end, the drag plate is fixedly connected to the bottom of the support platform 2 by screws. The spoiler fan assembly 4 is fixedly installed on the top of the outer shell 1. When the spoiler fan assembly 4 is working, it can transport the outside air to the airflow chamber, so that turbulence is formed inside the airflow chamber and the air pressure inside the airflow chamber is increased. The compressor 6 is located on the inner side of the airflow chamber and is fixedly installed on the top of the inner shell 3. The spoiler fan assembly 4 is located directly above the compressor 6. Part of the gas blown out by the spoiler fan assembly 4 is directly blown on the compressor 6 to dissipate heat from the compressor 6 and ensure the working stability of the compressor 6. The gas-liquid separator 8 is fixedly installed on the outside of the inner shell 3, the evaporator 5 is installed on the inner side wall of the outer shell 1, and the spiral tube 13 is arranged on the outside of the spoiler fan assembly 4 and is fixedly connected to the inner top of the outer shell 1.

[0036] Among them, the air outlet of the compressor 6 is connected to the four-way valve 10 through a pipeline, the four-way valve 10 is connected to the heat exchanger 7, the evaporator 5, and the gas-liquid separator 8 through a pipeline, the gas-liquid separator 8 is connected to the compressor 6 through a pipeline, the heat exchanger 7 is connected to the electronic expansion valve 9 through a pipeline, and the air outlet of the electronic expansion valve 9 is connected to the evaporator 5 through a pipeline.

[0037] A two-way circulation pipe is connected between the hot water tank 11 and the heat exchanger 7. A pump body 12 is installed on one pipe in the two-way circulation pipe. The liquid outlet of the pump body 12 is connected to a reflux branch pipe through a tee. The solution in the reflux branch pipe refluxes into the heat exchanger 7. The spiral tube 13 is arranged in series on the reflux branch pipe.

[0038] When working, the compressor 6 works to compress the gaseous refrigerant to generate high temperature and high pressure, and then transports it to the heat exchanger 7. At the same time, the pump body 12 works to transport the cold water in the hot water tank 11 into the heat exchanger 7. The gaseous refrigerant (high temperature and high pressure state) exchanges heat with the cold water. The gaseous refrigerant is cooled to a liquid state, passes through the electronic expansion valve 9, and evaporates to a gaseous state in the evaporator 5. The gaseous refrigerant absorbs heat from the air in the evaporator 5, passes through the gas-liquid separator 8, and then flows back to the compressor 6 for circulation.

[0039] During the above work, the spoiler fan assembly 4 works according to demand. For example, when the evaporator 5 cannot perform self-heating well, the spoiler fan assembly 4 sends external gas into the airflow chamber. On the one hand, it can directly dissipate heat for the compressor 6. On the other hand, it increases the air pressure inside the airflow chamber, so that the airflow passes through the evaporator 5 faster and the heat exchange efficiency is higher.

[0040] In winter, the evaporator 5 of the external unit is frosted, the return branch is opened, the spoiler fan assembly 4 is turned on, the hot water in the hot water tank 11 passes through the spiral tube 13, and the air flow blown by the spoiler fan assembly 4 contacts the spiral tube 13 and is heated, and then blows on the copper tube of the evaporator 5 to achieve defrosting.

[0041] In one embodiment, a first valve body is disposed on the reflux branch pipe, a drainage pipeline 14 is connected to the reflux branch pipe, and a second valve body is disposed on the drainage pipeline 14 .

[0042] In summer, the first valve body is normally closed and the second valve body is normally open, so that there is no water flow inside the return branch pipe, thereby preventing the return branch pipe from being corroded by water.

[0043] In winter, the detection module and the control module arranged inside the external unit control the opening and closing of the first valve body and the second valve body.

[0044] In one embodiment, the external housing 1 is a cubic structure, and one side of the external housing 1 is open and has a cover plate installed, and the other three sides of the external housing 1 are porous plates. The copper tubes of the evaporator 5 are distributed on the inner side of the porous plate of the external housing 1. The copper tubes of the evaporator 5 are in a semi-enclosed structure, with a larger expansion area and higher heat exchange efficiency.

[0045] In one embodiment, the inner shell 3 is a frustum shell, and the bottom end surface of the inner shell 3 is the same size as the bottom end surface of the outer shell 1, so that the airflow chamber formed is larger at the top and smaller at the bottom, so that the input airflow can flow outward from the porous plate of the outer shell 1 more evenly.

[0046] In one embodiment, the external housing 1 includes: an embedded cover 41 and a fan 42. The embedded cover 41 is fixedly installed in a reserved installation on the top of the external housing 1, and air holes are opened on the side and bottom of the embedded cover 41. The fan 42 is fixedly installed inside the embedded cover 41.

[0047] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A frost-free air energy heat pump water heater system, comprising: An outdoor unit installed outdoors; A hot water tank (11) installed indoors, the hot water tank (11) being used to supply hot water to users, the external unit being connected to the hot water tank (11) via a pipeline; Characterized in that the external unit comprises: A support platform (2), an outer casing (1) is fixedly mounted on the top of the support platform (2), an inner casing (3) is fixedly mounted on the top of the support platform (2) and located inside the outer casing (1), the bottom end of the inner casing (3) is open, and a mounting opening is provided at the bottom of the support platform (2) and at a position corresponding to the bottom end opening of the inner casing (3), and an airflow chamber is formed between the inner side of the outer casing (1) and the outer side of the inner casing (3); A heat exchanger (7), wherein the heat exchanger (7) is fixedly mounted on the inner side of the inner shell (3); A spoiler fan assembly (4), wherein the spoiler fan assembly (4) is fixedly mounted on the top of the external machine housing (1); A compressor (6), the compressor (6) being located inside the airflow chamber and fixedly mounted on the top of the inner shell (3); A gas-liquid separator (8), wherein the gas-liquid separator (8) is fixedly mounted on the outside of the inner shell (3); an evaporator (5), the evaporator (5) being mounted on the inner wall of the outer casing (1); A spiral tube (13), the spiral tube (13) being arranged on the outside of the spoiler fan assembly (4) and fixedly connected to the inner top of the outer casing (1); The air outlet of the compressor (6) is connected to a four-way valve (10) via a pipeline, the four-way valve (10) is connected to a heat exchanger (7), an evaporator (5), and a gas-liquid separator (8) via a pipeline, the gas-liquid separator (8) is connected to the compressor (6) via a pipeline, the heat exchanger (7) is connected to an electronic expansion valve (9) via a pipeline, and the air outlet of the electronic expansion valve (9) is connected to the evaporator (5) via a pipeline; A two-way circulation pipe is connected between the hot water tank (11) and the heat exchanger (7). A pump body (12) is installed on a pipe in the two-way circulation pipe. The liquid outlet of the pump body (12) is connected to a reflux branch pipe through a tee. The solution in the reflux branch pipe refluxes into the heat exchanger (7). The spiral pipe (13) is arranged in series on the reflux branch pipe.

2. The frost-free air energy heat pump water heater system according to claim 1, characterized in that: The reflux branch pipe is provided with a first valve body, the reflux branch pipe is connected to a drainage pipeline (14), and the drainage pipeline (14) is provided with a second valve body.

3. The frost-free air energy heat pump water heater system according to claim 1, characterized in that: The outer machine housing (1) is a cubic structure, one side of the outer machine housing (1) is open and has a cover plate installed thereon, and the other three sides of the outer machine housing (1) are porous plates.

4. The frost-free air energy heat pump water heater system according to claim 3, characterized in that: The copper tubes of the evaporator (5) are distributed on the inner side of the porous plate of the outer casing (1).

5. The frost-free air energy heat pump water heater system according to claim 3, characterized in that: The inner shell (3) is a frustum shell, and the bottom end surface of the inner shell (3) is the same size as the bottom end surface of the outer shell (1).

6. The frost-free air energy heat pump water heater system according to claim 1, characterized in that: The outer housing (1) comprises an embedded cover (41) and a fan (42); the embedded cover (41) is fixedly mounted in a reserved mounting area at the top of the outer housing (1); air holes are provided on the side and bottom surfaces of the embedded cover (41); and the fan (42) is fixedly mounted inside the embedded cover (41).

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