Comprehensive implementation tool and method for air conditioner outdoor unit for updating

Abstract

The invention relates to the technical field of air conditioner maintenance, in particular to a comprehensive implementation tool and method for an air conditioner outdoor unit for updating, the comprehensive implementation tool comprises a first two-position reversing valve, and an air filter, a dryer, a first on-off valve and a pump are sequentially arranged at one output end of the first two-position reversing valve in the medium circulation direction; a liquid filter, a second on-off valve and the pump are sequentially arranged at the other output end according to the medium flowing direction; the input end of the second two-position reversing valve is connected with the pump; wherein one output end is sequentially provided with a pressure bin, a fourth on-off valve and an output pipeline in the medium circulation direction, and the other output end is directly connected with the output pipeline. The cleaning agent bin is communicated with the output pipeline by arranging a fifth on-off valve; the mode that cleaning agent mixed gas flushing and deep circulation cleaning are matched is adopted, on one hand, the cleaning effect of the pipeline is improved, and on the other hand, the using amount of a cleaning agent is reduced.

Description

Technical Field

[0001] This invention relates to the field of air conditioning maintenance technology, and in particular to a comprehensive implementation tool and method for replacing outdoor units of air conditioners. Background Technology

[0002] Currently, due to the increasing age of central air conditioning systems, outdoor units are experiencing frequent malfunctions. Furthermore, older air conditioners lag significantly behind current technologies in terms of energy consumption and smart features. Unlike split-type wall-mounted air conditioners, central air conditioning indoor units are typically integrated with the interior design. Replacing the entire central air conditioning system requires demolishing the existing interior decor, which is often unacceptable to users.

[0003] Some manufacturers offer replacement units that only replace the outdoor unit, thus avoiding the need to replace the entire air conditioning system and ensuring no damage to the user's existing decor. Replacing the outdoor unit involves several technical challenges. The pipes, heat exchangers, and other components of the indoor unit have been in operation for many years, accumulating impurities, grease, moisture, and other factors that are detrimental to system operation. If these factors are not controlled, the new outdoor unit will also experience reduced efficiency due to the dirt in the pipes, and may even damage the compressor. Therefore, proper handling of the pipes during the outdoor unit replacement process is crucial.

[0004] Currently, the tools used for on-site pipeline cleaning are mostly general-purpose tools, such as pumps, pressure gauges, and various valve assemblies, resulting in a wide variety of tools. For particularly dirty pipelines, a pump is needed to continuously pump liquid cleaning agent into the pipeline for cleaning. After cleaning, the cleaning agent mixed with impurities flows out from the open port. This cleaning method has the problem of unsatisfactory cleaning effect if a small amount of cleaning agent is used, while a large amount of cleaning agent is needed to achieve the desired cleaning effect, which leads to waste. Summary of the Invention

[0005] The purpose of this invention is to provide a comprehensive implementation tool and method for updating outdoor units of air conditioners, thereby solving the problems existing in the prior art. To achieve the above objective, this invention provides the following technical solution:

[0006] In a first aspect, the present invention provides a comprehensive implementation tool for updating an outdoor unit of an air conditioner, comprising:

[0007] The first and second directional control valves have an air filter, a dryer, a first on / off valve, and a pump arranged in sequence according to the direction of medium flow at one output end; and a liquid filter, a second on / off valve, and the pump arranged in sequence according to the direction of medium flow at the other output end.

[0008] The second two-position reversing valve has its input end connected to the pump; one of its output ends is equipped with a pressure chamber, a fourth on / off valve and an output pipeline in sequence according to the medium flow direction, and the other output end is directly connected to the output pipeline.

[0009] The cleaning agent tank is connected to the output pipeline via a fifth on / off valve.

[0010] As a further technical solution, one-way valves are provided on the pipelines between the pump and the second two-position reversing valve, as well as between the second two-position reversing valve and the pressure chamber.

[0011] As a further technical solution, the pump input end is also provided with a passage and a third on / off valve is provided thereon.

[0012] As a further technical solution, a first pressure sensor is provided in the passage of the third on / off valve.

[0013] As a further technical solution, a first humidity sensor is provided on the pipeline between the dryer and the first on / off valve, and a second pressure sensor and a second humidity sensor are provided on the pressure chamber.

[0014] As a further technical solution, a control system is also included, which is used to control the opening and closing of the valve and to collect sensor information.

[0015] Secondly, the present invention provides a method of working according to the integrated implementation tool for updating air conditioner outdoor units as described in the first aspect, comprising the following steps:

[0016] Open the first on / off valve, switch the first two-position reversing valve and the second two-position reversing valve, and the pump will continuously pump the air that has passed through the air filter and dryer into the pressure chamber to store and form compressed air, and stop after reaching the set pressure;

[0017] Open the fourth and fifth shut-off valves, and the high-speed flowing compressed gas and cleaning agent will mix and atomize in the output pipeline and be sprayed into the air conditioning duct, and discharged from the open port of the air conditioning duct.

[0018] After being flushed with a mixture of compressed air and cleaning agent, the second and fifth on / off valves are opened, and the first and second position reversing valves are switched. The open port of the air conditioning pipe is connected to the input end of the first and second position reversing valves to form a circulation pipeline. At this time, the pump drives the cleaning agent in the circulation pipeline to circulate, and the liquid filter filters out impurities, thereby achieving circulation cleaning.

[0019] As a further technical solution, during the circulating cleaning process, the cleaning agent tank injects cleaning agent into the circulating pipeline and then shuts off.

[0020] As a further technical solution, after the circulation cleaning is completed, the open port of the air conditioning pipeline is removed from the first and second reversing valves, the fourth on / off valve is opened, and the air conditioning pipeline is flushed separately with dry compressed air to discharge the cleaning agent from the pipeline.

[0021] As a further technical solution, after the air conditioning pipeline is installed, the third on / off valve is opened, the second two-position reversing valve is reversed, the pump evacuates the air conditioner, and the extracted air is discharged from the output pipeline.

[0022] The beneficial effects of the present invention are as follows:

[0023] (1) In this embodiment of the invention, the pressure chamber, cleaning agent chamber, pump, on / off valve, and reversing valve work together. The pressure chamber can store compressed air as a gas source. Then, the high-speed compressed gas discharged from the pressure chamber mixes with the cleaning agent in the output pipeline and is atomized before being sprayed into the air conditioning duct. It is then discharged from the open port of the air conditioning duct, realizing the cleaning agent mixture flushing. This process first blows out the impurities and dust inside the air conditioning duct into the open space, and can also dissolve and discharge a certain amount of grease (preliminary cleaning). After the cleaning agent mixture flushing, the open port of the air conditioning duct is connected to the circulation cleaning inlet to form a circulation pipeline. At this time, the pump drives the cleaning agent in the circulation pipeline to circulate, and the liquid filter continuously filters out the impurities, thereby achieving deep circulation cleaning. The combination of preliminary cleaning and deep circulation cleaning improves the cleaning effect of the pipeline on the one hand, and reduces the amount of cleaning agent used on the other hand.

[0024] (2) After the circulation cleaning is completed, the present invention performs a high-pressure air cleaning operation, using dry compressed air to rinse the air conditioning pipeline separately, and discharges the cleaning agent into the pipeline to ensure that the air conditioning pipeline is free of impurities and moisture.

[0025] (3) This invention provides a comprehensive tool for updating the outdoor unit of an air conditioner. It creatively integrates various tools, and with the help of sensors and various actuators, it relies on the control system to realize multiple modes of operation such as compressed air storage, cleaning agent mixed gas flushing, circulating cleaning, high-pressure air gas washing and vacuuming, which makes it convenient for staff to carry out maintenance. Attached Figure Description

[0026] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute a limitation thereof. It should also be understood that these drawings are for simplicity and clarity and are not necessarily drawn to scale. The invention will now be described and explained with additional features and details using the drawings, wherein:

[0027] Figure 1 A schematic diagram of the integrated implementation tool for updating air conditioner outdoor units in an embodiment of the present invention is shown.

[0028] In the diagram: 1. First two-position directional control valve; 2. Air filter; 3. Dryer; 4. Liquid filter; 5. First on / off valve; 6. Second on / off valve; 7. Third on / off valve; 8. Pump; 9. First check valve; 10. Second two-position directional control valve; 11. Second check valve; 12. Pressure chamber; 13. Fourth on / off valve; 14. Fifth on / off valve; 15. Cleaning agent chamber; 16. First humidity sensor; 17. First pressure sensor; 18. Second humidity sensor; 19. Second pressure sensor. Detailed Implementation

[0029] The technical solutions in typical embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0030] Example 1

[0031] like Figure 1 As shown, this embodiment provides a comprehensive implementation tool for updating an outdoor unit of an air conditioner, including a first two-position reversing valve 1, an air filter 2, a dryer 3, a liquid filter 4, a first on / off valve 5, a second on / off valve 6, a third on / off valve 7, a pump 8, a first check valve 9, a second two-position reversing valve 10, a second check valve 11, a pressure chamber 12, a fourth on / off valve 13, a fifth on / off valve 14, a cleaning agent chamber 15, and a control system.

[0032] The control system includes a human-machine interface screen, a microcontroller system, and a sensor detection system, used to control the opening and closing of valves and collect sensor information. The control system has multiple built-in operating modes; clicking the corresponding mode on the human-machine interface screen controls the opening and closing of the corresponding valve and collects information from the corresponding sensors. The integrated implementation tool in this embodiment can perform the following modes: compressed air storage, cleaning agent mixture flushing, circulating cleaning, high-pressure air washing, and vacuuming.

[0033] The first two-position directional valve 1 has an air filter 2, a dryer 3, a first on / off valve 5, and a pump 8 arranged in sequence according to the direction of medium flow at one of its output ends; and a liquid filter 4, a second on / off valve 6, and a pump 8 arranged in sequence according to the direction of medium flow at the other output end.

[0034] The second two-position directional valve 10 has its input end connected to the pump 8; one of its output ends is equipped with a pressure chamber 12, a fourth on / off valve 13 and an output pipeline in the order of medium flow direction, and the other output end is directly connected to the output pipeline.

[0035] With the first two-position directional valve 1 switched to position A, the first on / off valve 5 opened, and the second two-position directional valve switched to position B, air is continuously pumped into the pressure chamber by the pump 8, thereby achieving compressed air storage. The purpose of compressed air storage is to provide an air source for subsequent cleaning agent mixture flushing and high-pressure air washing processes. Users can preset the compressed air storage pressure through the human-machine interface screen. After startup, the actions of each actuator are shown in Table 1.

[0036] Table 1. Actions of each execution component in each mode

[0037] model First and second directional control valves Second and second position directional valves First on / off valve Second shut-off valve Third shut-off valve Fourth on / off valve Fifth on / off valve Pressurized air storage A B open close close close close Cleaning agent mixture flushing A * close close close open open Circulating cleaning B A close open close close open High-pressure air washing B A close close close open close Vacuuming B A close close open close close

[0038] One-way valves are provided on the pipelines between pump 8 and the second two-position reversing valve 10 and between the second two-position reversing valve 10 and the pressure chamber 12, specifically the first one-way valve 9 and the second one-way valve 11, to prevent gas backflow.

[0039] During the cleaning process, water vapor and impurities should be avoided from entering the pipeline as much as possible. Therefore, after the air passes through the air filter 2 and the dryer 3, it is pressurized by the pump 8. During this process, the first humidity sensor 16 will detect the humidity data in real time. If the dryer 3 cannot meet the dehumidification requirements of the air, the pressurization action will stop until the air is dried again by the dryer 3 and then restarted, thereby ensuring that the humidity of the compressed air in the pressure chamber 12 meets the requirements.

[0040] The pressure chamber 12 is equipped with a second humidity sensor 18 and a second pressure sensor 19. When the internal gas pressure equals the user-set value, the pressurization stops. When the value of the humidity sensor inside the pressure chamber 12 exceeds the standard, it indicates that the internal gas moisture content is too high.

[0041] The cleaning agent tank 15 included in the integrated implementation tool is connected to the output pipeline via a fifth on / off valve 14.

[0042] Once pressure chamber 12 is filled with gas, a cleaning agent mixture flush (i.e., flushing with a mixture of compressed air and cleaning agent) can be performed. At this time, the fourth shut-off valve 13 and the fifth shut-off valve 14 are opened. The actions of the other actuators are shown in Table 1. The high-speed flowing compressed gas and cleaning agent are mixed and atomized in the output pipeline and then sprayed into the air conditioning duct, and discharged from the open port of the air conditioning duct. This process first blows out impurities and dust inside the air conditioning duct into the open space, and can also dissolve and discharge some grease.

[0043] After flushing with the cleaning agent mixture, open the second on / off valve 6 and the fifth on / off valve 14, and switch the first two-position reversing valve 1 and the second two-position reversing valve 10. The first two-position reversing valve 1 switches to position B, and the second two-position reversing valve 10 switches to position A. The actions of the other actuators are shown in Table 1. Connect the open port of the air conditioning duct to the input end of the first two-position reversing valve 1 to form a circulation pipeline. At this time, the pump 8 drives the cleaning agent in the circulation pipeline to circulate, and the liquid filter 4 filters out impurities, thereby achieving circulation cleaning. This process is deep cleaning.

[0044] This embodiment utilizes a pressure chamber, a cleaning agent chamber, a pump, and on / off valves and reversing valves. The pressure chamber stores compressed air as a gas source. The high-speed compressed gas discharged from the pressure chamber mixes with the cleaning agent in the output pipeline, atomizes, and is then sprayed into the air conditioning ductwork. The mixture is discharged from the open port of the air conditioning ductwork, achieving cleaning agent-gas flushing. This process first blows out impurities and dust from inside the air conditioning ductwork into the open space, and also dissolves and removes some grease (preliminary cleaning). After flushing with the cleaning agent-gas mixture, the open port of the air conditioning ductwork is connected to the circulation cleaning inlet to form a circulation pipeline. At this time, pump 8 drives the cleaning agent in the circulation pipeline to circulate, and liquid filter 4 continuously filters out impurities, thereby achieving deep circulation cleaning. The combination of preliminary cleaning and deep circulation cleaning improves the cleaning effect of the pipeline and reduces the amount of cleaning agent used.

[0045] After the circulation cleaning is completed, a high-pressure air cleaning operation is performed. The open port of the air conditioning pipeline is disconnected from the first and second position reversing valve 1, and the fourth on / off valve 13 is opened. The actions of the other actuators are shown in Table 1. Dry compressed air is used to flush the air conditioning pipeline separately and the cleaning agent is discharged from the pipeline.

[0046] The pump 8 input end is also provided with a passage and a third on / off valve 7 is installed on it. A first pressure sensor 17 is installed on the passage with the third on / off valve 7. With the above structure, the integrated implementation tool can also realize vacuum operation.

[0047] After the air conditioning piping is installed, a vacuuming operation is required before refrigerant charging. During the vacuuming operation, connect the vacuum line to the vacuum inlet, open the third on / off valve 7, and switch the second two-position directional valve to position A. Refer to Table 1 for the operating status of the remaining actuators. Pump 8 starts working, and the first pressure sensor 17 collects the vacuuming pressure in real time. When the user-preset pressure is reached, the control system notifies the user that the vacuuming is complete via the human-machine interface screen and closes the third on / off valve 7.

[0048] This embodiment provides a comprehensive tool for updating air conditioner outdoor units, which creatively integrates various tools and, together with sensors and various actuators, relies on a control system to realize multiple modes of operation such as compressed air storage, cleaning agent mixture flushing, circulating cleaning, high-pressure air washing, and vacuuming, making it convenient for staff to perform maintenance.

[0049] Example 2

[0050] This embodiment, based on the working method of the integrated implementation tool for updating air conditioner outdoor units as described in Embodiment 1, includes the following steps:

[0051] S101, Compressed air storage

[0052] Open the first on / off valve 5, and switch the first two-position reversing valve 1 (position A) and the second two-position reversing valve 10 (position B). Pump 8 continuously pumps the air that has passed through air filter 2 and dryer 3 into pressure chamber 12 to store compressed air until the set pressure is reached and then stops. After the operation starts, the control system will automatically replenish air according to the pressure. When replenishing air, a prompt will be displayed on the human-machine interface screen.

[0053] S102, Cleaning agent mixture flushing

[0054] When the fourth shut-off valve 13 and the fifth shut-off valve 14 are opened, the high-speed flowing compressed gas and cleaning agent are mixed and atomized in the output pipeline and then sprayed into the air conditioning duct, and discharged from the open port of the air conditioning duct; the control system can set the time required for flushing, and an alarm sound will remind you when the set flushing time is reached.

[0055] S103, Circulating Cleaning

[0056] After rinsing with a mixture of compressed air and cleaning agent, the second on / off valve 6 and the fifth on / off valve 14 are opened, and the first two-position reversing valve 1 and the second two-position reversing valve 10 are switched. The open port of the air conditioning duct is connected to the input end (circulation cleaning inlet) of the first two-position reversing valve 1 to form a circulation pipeline. At this time, the pump 8 drives the cleaning agent in the circulation pipeline to circulate, and the liquid filter 4 filters out impurities, thereby achieving circulation cleaning. During the circulation cleaning process, the cleaning agent tank 15 injects cleaning agent into the circulation pipeline and then closes. The control system sets the cleaning time for this step, and an audible reminder will sound when the set rewash time is reached.

[0057] S104, High-pressure air washing

[0058] After the circulation cleaning is completed, disconnect the open port of the air conditioning pipe from the first and second position reversing valve 1, open the fourth on / off valve 13, use dry compressed air to flush the air conditioning pipe separately, and discharge the cleaning agent from the inside of the pipe.

[0059] S105, Vacuuming

[0060] After the air conditioning piping is installed, open the third on / off valve 7, switch the second two-position reversing valve 10, and pump 8 will evacuate the air conditioner. The extracted air will be discharged from the output pipe. Once the set pressure is reached, a notification will be given. After all the air inside the pipes has been completely purged, the subsequent refrigerant charging operation can proceed.

[0061] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solutions of the present invention by utilizing the methods and techniques disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall fall within the protection scope of the technical solutions of the present invention.

Claims

1. A comprehensive implementation tool for updating outdoor units of air conditioners, characterized in that, include: The first and second directional control valves have an air filter, a dryer, a first on / off valve, and a pump arranged in sequence according to the direction of medium flow at one output end; and a liquid filter, a second on / off valve, and the pump arranged in sequence according to the direction of medium flow at the other output end. The second two-position directional valve has its input end connected to the pump; One of the output ends is equipped with a pressure chamber, a fourth on / off valve, and an output pipeline in sequence according to the direction of medium flow; the other output end is directly connected to the output pipeline. The cleaning agent tank is connected to the output pipeline via a fifth on / off valve.

2. The comprehensive implementation tool for updating air conditioner outdoor units as described in claim 1, characterized in that, One-way valves are installed on the pipelines between the pump and the second two-position reversing valve, as well as between the second two-position reversing valve and the pressure chamber.

3. The comprehensive implementation tool for updating outdoor air conditioning units as described in claim 1, characterized in that, The pump input end is also provided with a passage and a third on / off valve is provided thereon.

4. The comprehensive implementation tool for updating air conditioner outdoor units as described in claim 3, characterized in that, A first pressure sensor is installed in the passage of the third on / off valve.

5. The comprehensive implementation tool for updating outdoor air conditioning units as described in claim 1, characterized in that, A first humidity sensor is installed on the pipeline between the dryer and the first on / off valve, and a second pressure sensor and a second humidity sensor are installed in the pressure chamber.

6. The comprehensive implementation tool for updating air conditioner outdoor units as described in claim 1, characterized in that, It also includes a control system for controlling the opening and closing of valves and collecting sensor information.

7. The working method of the integrated implementation tool for updating air conditioner outdoor units according to any one of claims 1-6, characterized in that, Includes the following steps: Open the first on / off valve, switch the first two-position reversing valve and the second two-position reversing valve, and the pump will continuously pump the air that has passed through the air filter and dryer into the pressure chamber to store and form compressed air, and stop after reaching the set pressure; Open the fourth and fifth shut-off valves, and the high-speed flowing compressed gas and cleaning agent will mix and atomize in the output pipeline and be sprayed into the air conditioning duct, and discharged from the open port of the air conditioning duct. After being flushed with a mixture of compressed air and cleaning agent, the second and fifth on / off valves are opened, and the first and second position reversing valves are switched. The open port of the air conditioning pipe is connected to the input end of the first and second position reversing valves to form a circulation pipeline. At this time, the pump drives the cleaning agent in the circulation pipeline to circulate, and the liquid filter filters out impurities, thereby achieving circulation cleaning.

8. The working method of the comprehensive implementation tool for updating air conditioner outdoor units as described in claim 7, characterized in that, During the circulating cleaning process, the cleaning agent tank injects cleaning agent into the circulating pipeline and then shuts off.

9. The working method of the comprehensive implementation tool for updating air conditioner outdoor units as described in claim 7, characterized in that, After the circulation cleaning is completed, disconnect the open port of the air conditioning pipe from the first and second reversing valves, open the fourth on / off valve, and use dry compressed air to flush the air conditioning pipe separately to discharge the cleaning agent from the inside of the pipe.

10. The working method of the comprehensive implementation tool for updating air conditioner outdoor units as described in claim 9, characterized in that, After the air conditioning piping is installed, open the third on / off valve and switch the second two-position reversing valve. The pump will then evacuate the air conditioner, and the extracted air will be discharged from the output pipe.

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