Air conditioning system and drainage system thereof

Abstract

The utility model relates to the technical field of air conditioners, in particular to an air conditioning system and a drainage system thereof, and aims to solve the problem that water in a drainage pipe and a drainage pump flows back into an air conditioner and is easy to leak after the existing air conditioning system is shut down or powered off. In order to achieve the purpose, the drainage system of the air conditioning system comprises a drainage pump, a drainage pipe and a check valve, the drainage pipe is connected to a drainage port of the drainage pump, the check valve is arranged on the drainage port or the drainage pipe, and the check valve only allows water to flow to the drainage pipe from the drainage pump. During drainage, the drainage pump is started, so that water is discharged outwards through the check valve and the drainage pipe; when the drainage pump is shut down or powered off, the check valve plays a cut-off role, so that water in the drainage pipe cannot flow back, and water in the drainage pump cannot flow back under the action of negative pressure, so that the water is kept in the drainage pump. In other words, under the action of the check valve, water in the drainage pipe and the drainage pump cannot flow back, and the risk of leakage of the air conditioner is reduced.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, specifically providing an air conditioning system and its drainage system. Background Technology

[0002] With the development of technology and society, air conditioning systems have become indispensable electrical appliances in homes and offices. In cooling mode, the indoor unit produces condensate, which is discharged through a drain pump and drain pipe. In existing top-drain air conditioning systems, after the unit is turned off or the power is cut off, the condensate in the drain pipe and drain pump will flow back into the air conditioner under gravity, accumulating inside; this poses a risk of leakage.

[0003] Therefore, there is an urgent need for an air conditioning system and its drainage system to solve the above-mentioned technical problems. Utility Model Content

[0004] The present invention aims to solve the above-mentioned technical problem, namely, to solve the problem that water in the drain pipe and drain pump flows back into the air conditioner after the existing air conditioning system is turned off or the power is cut off, which easily causes water leakage.

[0005] In a first aspect, the present invention provides a drainage system for an air conditioning system, the drainage system comprising a drainage pump, a drainage pipe and a check valve, the drainage pipe being connected to the drain outlet of the drainage pump, and the check valve being disposed on the drain outlet or the drainage pipe, the check valve allowing water to flow from the drainage pump to the drainage pipe only.

[0006] In a specific embodiment of the drainage system of the aforementioned air conditioning system, the check valve includes a connecting pipe, a sealing ring, and a check element. The sealing ring is embedded in the connecting pipe, and the check element is disposed in the connecting pipe and located above the sealing ring. When the drain pump is turned off, the check element can abut against the sealing ring to block the connecting pipe.

[0007] In a specific embodiment of the drainage system of the aforementioned air conditioning system, the check valve is a spherical component.

[0008] In a specific embodiment of the drainage system of the aforementioned air conditioning system, the bottom end of the check valve is a tapered portion, which can be inserted into the sealing ring to seal the connecting pipe.

[0009] In a specific embodiment of the drainage system of the above-mentioned air conditioning system, a stop member is provided inside the connecting pipe. The stop member is located inside the connecting pipe and is used to stop the backflow preventer.

[0010] In a specific embodiment of the drainage system of the above-mentioned air conditioning system, the inner ring of the connecting pipe is provided with multiple ribs, and the backstop is located within the space enclosed by the multiple ribs.

[0011] In a specific embodiment of the drainage system of the above-mentioned air conditioning system, the sealing ring is located below the rib, and the stop is located above the rib.

[0012] In a specific embodiment of the drainage system of the above-mentioned air conditioning system, eight ribs are evenly distributed inside the connecting pipe.

[0013] In a second aspect, the present invention provides an air conditioning system, the air conditioning system comprising:

[0014] The drainage system of the air conditioning system as described above,

[0015] A water tank; the inlet of the drain pump is connected to the water tank for draining water from the water tank.

[0016] In a specific embodiment of the above-mentioned air conditioning system, the air conditioning system further includes a water receiving tray, the outlet of which is connected to the water tank for draining the collected water into the water tank.

[0017] With the above technical solution adopted, the drainage system of the air conditioning system of this utility model includes a drain pump, a drain pipe, and a check valve. The drain pipe is connected to the drain outlet of the drain pump, and the check valve is installed on the drain outlet or drain pipe. The check valve only allows water to flow from the drain pump to the drain pipe. During drainage, the drain pump is turned on, allowing water to be discharged outward through the check valve and drain pipe. When the system is turned off or the power is cut off, the check valve acts as a cutoff valve, preventing water in the drain pipe from flowing back. Under the action of negative pressure, water in the drain pump also cannot flow back, keeping the water within the drain pump. In other words, the check valve ensures that water in the drain pipe and drain pump will not flow back, reducing the risk of air conditioning leakage. Attached Figure Description

[0018] The preferred embodiments of this utility model are described below with reference to the accompanying drawings, in which:

[0019] Figure 1 This is a schematic diagram of the drainage system provided by this utility model;

[0020] Figure 2 This is a cross-sectional view of the drainage system provided by this utility model.

[0021] 1. Drain pump; 21. First pipeline; 22. Second pipeline; 3. Check valve; 31. Connecting pipe; 311. First pipe section; 312. Second pipe section; 32. Check valve; 33. Stop valve; 34. Sealing ring; 35. Rib. Detailed Implementation

[0022] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0023] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," which indicate directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] To address the problem of water flowing back into the air conditioner after it is turned off or the power is cut off, which can easily cause leaks.

[0026] like Figure 1 and 2 As shown, this embodiment discloses an air conditioning system, which includes an indoor unit, an outdoor unit, and a throttling element, wherein the air conditioning system is a common household air conditioner.

[0027] The outdoor unit includes an outdoor heat exchanger, and the indoor unit includes an indoor heat exchanger and an indoor fan; the outdoor heat exchanger, the throttling element, and the indoor heat exchanger are connected in sequence.

[0028] In this embodiment, the throttling element is specifically an electronic expansion valve; in other embodiments, the throttling element can also be a thermostatic expansion valve or a two-way throttling valve, as long as it can regulate the flow rate and throttle the flow.

[0029] The air conditioning system also includes a control module. The throttling element is connected to the control module. The control module controls the opening of the control valve to control the flow of refrigerant through the throttling element, thereby controlling the cooling or heating capacity of the air conditioning system.

[0030] The air conditioning system also includes a compressor and a four-way valve. The compressor's suction port is connected to the first port of the four-way valve, and its discharge port is connected to the second port. The side of the outdoor heat exchanger furthest from the controlled valve is connected to the third port of the four-way valve, and the side of the indoor heat exchanger furthest from the throttling element is connected to the fourth port. By changing the state of the four-way valve, the operating mode of the air conditioning system is switched. The four-way valve is communicatively connected to the control module, which controls the state of the four-way valve, thereby adjusting the operating mode of the air conditioning system.

[0031] In addition, the air conditioning system includes a gas-liquid separator. The inlet of the gas-liquid separator is connected to the first port of the four-way valve, and the outlet of the gas-liquid separator is connected to the suction port of the compressor. The gaseous refrigerant discharged from the gas-liquid separator is drawn into the compressor. Refrigerant flowing into the gas-liquid separator from the first port of the four-way valve separates the liquid refrigerant, which remains in the gas-liquid separator. Under the action of the subsequently flowing gaseous refrigerant, the liquid refrigerant in the gas-liquid separator absorbs heat from the gaseous refrigerant and vaporizes. It then flows out from the outlet of the gas-liquid separator and into the suction port of the compressor, where it is drawn in and compressed.

[0032] In cooling mode, the first and fourth ports of the four-way valve are connected, as are the second and third ports. The high-temperature, high-pressure refrigerant from the compressor flows through the second and third ports to the outdoor heat exchanger, where it absorbs heat from the air, reducing its temperature to a lower temperature. After exiting the outdoor heat exchanger, it passes through a throttling element and a liquid-side shut-off valve to the indoor heat exchanger for further heat exchange. At the indoor heat exchanger, the low-temperature liquid refrigerant absorbs heat from the air and vaporizes to cool the room. After exiting the indoor heat exchanger, it flows back to the compressor through the gas-side shut-off valve, the first and fourth ports of the four-way valve, and the gas-liquid separator for compression, thus initiating the next cycle.

[0033] In heating mode, the second and fourth ports of the four-way valve are connected, and the first and third ports are connected. The high-temperature, high-pressure refrigerant flowing from the compressor passes through the second and fourth ports, then through the gas-side shut-off valve to the outdoor heat exchanger. Heat exchange occurs in the indoor heat exchanger, where the high-temperature gaseous refrigerant releases heat to heat the room. After releasing heat in the indoor heat exchanger, the high-temperature gaseous refrigerant becomes a low-temperature liquid refrigerant. The refrigerant flowing from the indoor heat exchanger passes through the liquid-side shut-off valve to the electronic expansion valve, then to the outdoor heat exchanger for further heat exchange. The low-temperature liquid refrigerant absorbs heat in the outdoor heat exchanger, becoming a low-temperature gaseous refrigerant. After flowing out of the outdoor heat exchanger, the refrigerant passes through the first and third ports of the four-way valve and the gas-liquid separator back to the compressor for compression, thus initiating the next cycle.

[0034] The indoor unit also includes a drainage system, a drip tray, and a water tank. The indoor fan is located on one side of the indoor heat exchanger and supplies air to it, allowing the heat exchanger to heat or cool the fresh air. The drip tray is located below the indoor heat exchanger and collects the condensate produced. Specifically, in cooling mode, the indoor unit exchanges heat with the air, and water vapor in the air condenses on the surface of the heat exchanger, forming condensate.

[0035] The water tank is located below the drip tray, and the drip tray's outlet is connected to the water tank to collect condensate from the drip tray. The height of the drip tray's drain outlet is lower than the height of other locations, and the height from the edge of the drip tray to the drain outlet gradually decreases, meaning the surface of the drip tray is sloping.

[0036] The drainage system is specifically an upward drainage system, meaning that the water in the tank is first pumped upwards and then discharged downwards. The drainage system includes a drainage pump 1, a drainage pipe, and a check valve 3. The inlet of the drainage pump 1 is connected to the outlet of the tank through an inlet pipe, which allows the water in the tank to be discharged outwards by the pump.

[0037] The drain pipe is connected to the drain outlet of the drain pump 1. A check valve 3 is installed at the drain outlet or on the drain pipe. The check valve 3 only allows water to flow from the drain pump 1 to the drain pipe; that is, the check valve 3 does not allow water in the drain pipe to flow back to the drain pump 1, thus preventing water in the drain pipe and drain pump 1 from flowing back into the air conditioner and avoiding potential leaks. Specifically, the drain pipe includes a first pipe 21 and a second pipe 22, with the check valve 3 located between the first pipe 21 and the second pipe 22. The first pipe 21 is connected to the outlet of the drain pump 1, and the first pipe 21 is a flexible water pipe, allowing it to be installed normally inside the air conditioner without requiring specially reserved wiring.

[0038] The check valve 3 includes a connecting pipe 31, a sealing ring 34, and a check element 32. The sealing ring 34 is embedded in the connecting pipe 31, and the check element 32 is disposed in the connecting pipe 31 and located above the sealing ring 34. When the drain pump 1 is shut off, the check element 32 can abut against the sealing ring 34 to block the connecting pipe 31. Specifically, one end of the connecting pipe 31 with the sealing ring 34 is connected to the first pipeline 21. A connector can be provided at one end of the first pipeline 21, and the connector is connected to the connecting pipe 31 by a threaded connection or by a plug-in connection. The second pipeline 22 is connected to the connecting pipe 31 by a threaded connection or by a plug-in connection.

[0039] The sealing ring 34 is specifically a rubber ring, which is embedded in the connecting pipe 31 and has an interference fit with the connecting pipe 31. The connecting pipe 31 includes a first pipe section 311 and a second pipe section 312. Both the check valve 32 and the sealing ring 34 are disposed within the first pipe section 311. The second pipe section 312 can be inserted into the first pipe section 311, acting as a stop for the sealing ring 34, preventing it from shifting downwards and ensuring that the check valve 3 can continue to function. The first pipe section 311 and the second pipe section 312 are connected by a threaded connection or by a plug-in adhesive bonding method.

[0040] The check valve 32 is a spherical part. After the spherical part moves downward, the spherical surface comes into contact with the sealing ring 34, which can prevent the water in the second pipe 22 from flowing downward. At the same time, due to the negative pressure, the water in the first pipe 21 and the drain pump 1 will not flow back.

[0041] Regarding the shape of the backstop 32, it should be noted that although it is spherical in this embodiment, this is not a limitation of the present invention. Without departing from the principle of the present invention, in other embodiments, the bottom end of the backstop 32 is tapered, which can be inserted into the sealing ring 34 to seal the connecting pipe 31; it can also serve as a backstop. These modifications do not deviate from the basic principle of the present invention and will fall within the protection scope of the present invention.

[0042] A stop 33 is installed inside the connecting pipe 31 to stop the backflow preventer 32. During normal drainage, the backflow preventer 32 will move upwards due to the impact of water. The stop 33 prevents the backflow preventer 32 from being washed away, allowing the check valve 3 to continue its backflow prevention function after the drainage pump 1 is shut off. To ensure normal drainage, the stop 33 does not completely block the connecting pipe 31; it only blocks a portion of it. Furthermore, the maximum cross-sectional area of ​​the stop 33 is smaller than that of the backflow preventer 32, ensuring normal drainage without requiring additional diameter increases at the location of the stop 33 on the connecting pipe 31.

[0043] The inner ring of the connecting pipe 31 is provided with multiple raised ribs 35, and the check valve 32 is located within the space enclosed by the raised ribs 35. The sealing ring 34 is located below the raised ribs 35, and the stop 33 is located above the raised ribs 35; that is, the check valve 32 moves up and down within the space enclosed by the raised ribs 35, and the movement path is straight. During drainage, when water enters the connecting pipe 31 and flows at the check valve 32, it specifically flows towards the end where the stop 33 is located in the gap between two adjacent raised ribs 35. By setting the raised ribs 35, the water flow can be made to flow around the outer periphery of the check valve 32, which can ensure a relatively stable water flow and reduce water flow noise.

[0044] Specifically, the connecting pipe 31 is provided with eight evenly distributed protruding ribs 35. Regarding the number of protruding ribs 35, it should be noted that although there are eight in this embodiment, this is not a limitation of the present invention. In other embodiments, without departing from the principle of the present invention, the number of protruding ribs 35 can be four, five, six, or more, etc., all of which can limit the movement path of the backstop 32 and ensure normal water flow. Therefore, these all do not deviate from the basic principle of the present invention and will fall within the protection scope of the present invention.

[0045] When the indoor unit is running in cooling mode, condensation occurs on the surface of the indoor heat exchanger. This condensation drips onto the drip tray and flows into the water tank. A level sensor is installed in the water tank. When the level reaches a set value, the drain pump 1 starts, discharging water from the tank. During drainage, the check valve 32 moves upward under the influence of the water flow, reaching the stop valve 33, which limits its movement. The water flows upward through the gaps in the raised ribs 35 around the check valve 32 and then flows out through the second pipe 22.

[0046] When the level sensor detects that the liquid level is below the minimum level, the drain pump 1 is shut off. Under the action of gravity, the check valve 32 moves downward to the sealing ring 34. Together with the sealing ring 34, it seals the connecting pipe 31, preventing water in the second pipe 22 from flowing back, and consequently preventing water in the first pipe 21 from flowing back. This ensures that the air conditioner will not leak.

[0047] Regarding the air conditioning system, it should be noted that although the air conditioning system in this embodiment is a common household air conditioner, this is not a limitation of the present invention. Without departing from the principles of the present invention, in other embodiments, the air conditioning system can also be a motorhome air conditioner, wherein the drainage system is the drainage system of the motorhome air conditioner's indoor unit; the air conditioning system can also be a central air conditioning system, wherein the drainage system is specifically the drainage system of the central air conditioning unit's indoor unit. These will not deviate from the basic principles of the present invention and will fall within the protection scope of the present invention.

[0048] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A drainage system for an air conditioning system, characterized in that, The drainage system includes a drainage pump (1), a drainage pipe and a check valve (3). The drainage pipe is connected to the drain outlet of the drainage pump (1). The check valve (3) is installed on the drain outlet or the drainage pipe. The check valve (3) only allows water to flow from the drainage pump (1) to the drainage pipe. The check valve (3) includes a connecting pipe (31), a sealing ring (34), and a check element (32). The sealing ring (34) is embedded in the connecting pipe (31), and the check element (32) is disposed in the connecting pipe (31) and located above the sealing ring (34). When the drain pump (1) is closed, the check element (32) can abut against the sealing ring (34) to block the connecting pipe (31). A stop (33) is provided inside the connecting pipe (31). The stop (33) is provided inside the connecting pipe (31) and is used to stop the backstop (32).

2. The drainage system of the air conditioning system according to claim 1, characterized in that, The backstop (32) is a spherical part.

3. The drainage system of the air conditioning system according to claim 1, characterized in that, The bottom end of the backstop (32) is tapered, and the tapered part can be inserted into the sealing ring (34) to seal the connecting pipe (31).

4. The drainage system of the air conditioning system according to claim 1, characterized in that, The inner ring of the connecting pipe (31) is provided with a plurality of ribs (35), and the backstop (32) is located within the space enclosed by the plurality of ribs (35).

5. The drainage system of the air conditioning system according to claim 4, characterized in that, The sealing ring (34) is located below the rib (35), and the stop (33) is located above the rib (35).

6. The drainage system of the air conditioning system according to claim 4, characterized in that, The connecting pipe (31) is provided with eight protruding ribs (35) evenly distributed inside.

7. An air conditioning system, characterized in that, It includes: The drainage system of the air conditioning system as described in any one of claims 1-6, Water tank; the inlet of the drain pump (1) is connected to the water tank for draining water from the water tank.

8. The air conditioning system according to claim 7, characterized in that, The air conditioning system also includes a water collection tray, the outlet of which is connected to the water tank for draining collected water into the water tank.

Images