WO2022007343A1

WO2022007343A1 - Air conditioning unit

Info

Publication number: WO2022007343A1
Application number: PCT/CN2020/138481
Authority: WO
Inventors: 谷彦涛; 代斌; 牟珊珊
Original assignee: 重庆美的通用制冷设备有限公司
Priority date: 2020-07-07
Filing date: 2020-12-23
Publication date: 2022-01-13
Also published as: CN111811173A

Abstract

The present application provides an air conditioning unit, comprising: a gas-liquid separator, the gas-liquid separator being provided with an oil discharging port; and an oil pumping assembly, the oil pumping assembly being connected to the gas-liquid separator and provided with an oil pumping channel, the oil pumping channel being communicated with the oil discharging port, and the oil pumping assembly providing suction force. According to the air conditioning unit provided by the present application, oil discharging power is increased by means of the oil pumping assembly, so that oil in the gas-liquid separator can be pumped out from the oil discharging port, blockage of the gas-liquid separator is avoided; moreover, the part of oil flows back to a compressor, continuous reduction of the oil amount of the compressor is avoided, and normal work of the whole air conditioning unit is guaranteed.

Description

Air conditioning units

This application claims the priority of the Chinese patent application with the application number "202010643682.3" and the application name "Air Conditioning Unit", which was submitted to the State Intellectual Property Office of China on July 7, 2020, the entire contents of which are incorporated into this application by reference .

technical field

The present application belongs to the technical field of air-conditioning equipment, and in particular, relates to an air-conditioning unit.

Background technique

Air-cooled heat pump units are generally equipped with gas-liquid separators. When the oil in the system flows through the gas-liquid separator with the refrigerant, the oil is retained in the gas-liquid separator due to the decrease in flow rate. If this part of the oil is not discharged in time, the oil will accumulate more and more, resulting in the gas-liquid separator. It is blocked, so it is necessary to discharge this part of the oil through certain measures.

As shown in FIG. 1 , in the prior art, an oil discharge port and a pipeline are usually provided at the bottom of the gas-liquid separator 100 ′, so that the oil can be discharged from the gas-liquid separator 100 ′ and return to the compressor 200 ′. The viscosity of the oil is relatively high, and when the power to discharge the oil is insufficient, the oil return efficiency is low, which will still cause the gas-liquid separator 100' to be blocked.

Application content

The present application aims to solve at least one of the technical problems existing in the prior art.

In view of this, the present application provides an air-conditioning unit, which includes a gas-liquid separator, and the gas-liquid separator is provided with an oil discharge port; an oil pumping assembly is connected to the gas-liquid separator, and the oil pumping assembly is provided with an oil pumping channel for pumping oil. The passage communicates with the oil discharge port, and the oil sucking assembly provides the suction force.

The air-conditioning unit provided by the present application is provided with an oil discharge port on the gas-liquid separator, and further includes an oil suction assembly connected to the gas-liquid separator, the oil suction channel of the oil suction assembly is connected to the oil discharge port, and the oil suction assembly provides suction The air-conditioning unit provided by this application increases the oil discharge power through the oil pumping assembly, so that the oil in the gas-liquid separator can be extracted from the oil discharge port to avoid gas The liquid separator is blocked, and at the same time, this part of the oil is returned to the compressor, so as to avoid the continuous reduction of the oil volume of the compressor, and ensure the normal operation of the entire air conditioning unit.

In addition, the air-conditioning unit provided according to the above-mentioned technical solutions of the present application also has the following additional technical features:

In a possible design, the air conditioning unit further includes: a compressor, the compressor has an intake end, and the oil suction passage communicates with the intake end.

In this design, the oil pumping channel transports the oil extracted from the gas-liquid separator to the compressor, and supplies the compressor with the oil needed for its normal operation, so that the oil enters the system circulation and avoids the waste of oil.

In a possible design, the oil sucking assembly includes: an oil sucking pipe, the first end of the oil sucking pipe is connected to an oil discharge port; a venturi pipe, an oil sucking passage is arranged in the venturi pipe, and the oil sucking passage is provided with an air inlet and an oil outlet The air port, the venturi tube is also provided with a connecting part, the connecting part is provided with an oil suction port communicating with the oil suction channel, and the second end of the oil suction pipe is connected with the oil suction port; along the extension direction of the oil suction channel, the oil suction channel is located in the inlet The flow area at the air port is larger than the flow area of the oil suction channel at the connection part.

In this design, according to the principle of the Venturi effect, the pressure in the place where the flow rate is fast is low, the pressure in the gas-liquid separator is greater than the pressure at the connection part of the oil-suction passage, and a pressure difference is formed between the gas-liquid separator and the oil-suction passage. , the first end of the oil suction pipe is connected to the oil discharge port, and the second end of the oil suction pipe is connected to the oil suction port. Due to the existence of the pressure difference, the Venturi pipe smoothly draws the oil from the gas-liquid separator.

In a possible design, the compressor also has an exhaust end; the air conditioning unit further includes: a first connection pipe, the first end of the first connection pipe is connected to the exhaust end, and the second end of the first connection pipe is connected to the intake air a second connecting pipe, the first end of the second connecting pipe is connected to the exhaust port, and the second end of the second connecting pipe is connected to the intake end.

In this design, the first end of the first connecting pipe is connected to the exhaust end, the second end of the first connecting pipe is connected to the air inlet, the compressor sends the exhaust gas into the air inlet, and the air conditioning unit usually includes a compressor, The air-conditioning unit of the present application does not require an external air source, and provides flowing gas for the oil pumping member through the gas circulation of the compressor. In addition, the first end of the second connecting pipe is connected to the exhaust port, and the second end of the second connecting pipe is connected to the inlet and outlet. At the gas end, the oil discharged from the exhaust port can be returned to the compressor to ensure the normal operation of the compressor.

In a possible design, the air-conditioning unit further includes: a solenoid valve, which is arranged on the oil suction pipe.

In this design, the solenoid valve is set on the oil pumping pipe, which can be changed according to the working conditions, such as changes in water temperature, ambient temperature, compressor load, etc., through the on-off of the solenoid valve or the size of the opening of the solenoid valve, the discharge of the oil outlet can be adjusted. The amount of oil is controlled, so that too much refrigerant will not return to the compressor together with the oil, so as to ensure the normal operation of the compressor and even the entire air conditioning unit.

In a possible design, the oil pumping assembly includes: a third connecting pipe, the first end of which is connected to the oil discharge port; a pump body, the pump body has a suction part and an exhaust part, and the third connecting pipe The second end is connected to the suction part, and the pump body provides suction; the fourth connecting pipe, the first end of the fourth connecting pipe is connected to the exhaust part, and the second end of the fourth connecting pipe is connected to the intake end.

In this design, the pump body has a suction part and an exhaust part, the first end of the second connecting pipe is connected to the oil discharge port, the second end of the second connecting pipe is connected to the suction part, and the pump body provides suction force, Pump out the oil from the gas-liquid separator, the first end of the fourth connecting pipe is connected to the exhaust part, and the second end of the fourth connecting pipe is connected to the intake end, that is, after the pump body draws out the oil, it is transported to the compressor for For the normal operation of the compressor, the oil can be circulated in the system and the waste of oil is avoided.

In a possible design, along the vertical line, the oil discharge port is located at the lowest position of the gas-liquid separator.

In this design, the air-conditioning unit is in the direction of the vertical line, and the oil discharge port is located at the lowest part of the gas-liquid separator, and the oil in the gas-liquid separator gathers at the oil discharge port, which speeds up the efficiency of oil discharge and makes the oil from The gas-liquid separator can be discharged smoothly to avoid the waste of oil.

In a possible design, the first wall surface of the gas-liquid separator is configured as a curved surface, and the first wall surface is provided with an oil discharge port; the first wall surface is the lowest wall surface of the gas-liquid separator along the vertical line.

In this design, the first wall is the lowest wall of the gas-liquid separator along the vertical line, the first wall of the gas-liquid separator is a curved surface, and an oil discharge port is provided on the curved surface. The oil gathers to the oil discharge port more quickly, which speeds up the efficiency of oil discharge, so that the oil can be smoothly discharged from the gas-liquid separator, avoiding the waste of oil.

In a possible design, the gas-liquid separator is provided with an air outlet; the air-conditioning unit further includes: a fifth connecting pipe, the first end of the fifth connecting pipe is connected to the air outlet, and the second end of the fifth connecting pipe is connected to the intake air end.

In this design, the first end of the fifth connecting pipe is connected to the air outlet, the second end of the fifth connecting pipe is connected to the intake end, the oil in the gas-liquid separator can be discharged from the oil discharge port, and the fifth connecting pipe The separated gas is sent to the compressor.

Additional aspects and advantages of the present application will be presented in the description section which follows, and in part will become apparent from the following description, or may be learned by practice of the application.

Description of drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily understood from the following description of embodiments in conjunction with the accompanying drawings, wherein:

Fig. 1 shows the structural schematic diagram of the air-conditioning unit in the prior art;

2 shows a schematic structural diagram of an air-conditioning unit according to an embodiment of the present application;

FIG. 3 shows a schematic structural diagram of an air conditioning unit according to another embodiment of the present application.

Among them, the corresponding relationship between the reference numerals and the component names in Fig. 1, Fig. 2 and Fig. 3 is:

100' gas-liquid separator, 200' compressor.

100 gas-liquid separator, 102 oil outlet, 200 compressor, 201 intake end, 202 exhaust end, 300 solenoid valve, 400 oil pumping assembly, 401 oil pumping pipe, 402 venturi tube, 4021 connecting part, 403 third Connecting pipe, 404 pump body, 405 fourth connecting pipe, 500 first connecting pipe, 600 second connecting pipe, 700 fifth connecting pipe.

detailed description

In order to more clearly understand the above objects, features and advantages of the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments may be combined with each other in the case of no conflict.

Many specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific implementation disclosed below. example limitations.

An air conditioning unit provided according to some embodiments of the present application will be described below with reference to FIGS. 2 and 3 .

Example 1:

As shown in FIG. 2 , the air-conditioning unit provided in this embodiment includes: a gas-liquid separator 100, and the gas-liquid separator 100 is provided with an oil discharge port 102; an oil-pumping assembly 400 is connected to the gas-liquid separator 100, and the oil-pumping assembly 400 An oil sucking channel is provided, the oil sucking channel communicates with the oil discharge port 102, and the oil sucking assembly 400 provides suction force.

The air-conditioning unit provided by the present application is provided with an oil discharge port 102 on the gas-liquid separator 100, and further includes an oil suction assembly 400 connected to the gas-liquid separator 100, and the oil suction channel of the oil suction assembly 400 is connected to the oil discharge port 102, The oil suction assembly 400 provides a suction force, so that the oil inside the gas-liquid separator 100 can flow out from the oil discharge port 102 smoothly. The oil can be extracted from the oil discharge port 102 to avoid blockage of the gas-liquid separator 100. At the same time, this part of the oil is returned to the compressor 200 to avoid the continuous reduction of the oil volume of the compressor 200 and ensure the normal operation of the entire air conditioning unit.

Embodiment 2:

As shown in FIG. 2 , in a specific embodiment of the first embodiment, the air conditioning unit further includes: a compressor 200 , the compressor 200 has an intake end 201 , and the oil suction passage communicates with the intake end 201 .

In this embodiment, the oil pumping channel transports the oil extracted from the gas-liquid separator 100 to the compressor 200, so as to supply the compressor 200 with the oil required for its normal operation, so that the oil enters the system for circulation and avoids the waste of oil.

Embodiment three:

As shown in FIG. 2 , in the above embodiment, the oil sucking assembly 400 includes: an oil sucking pipe 401, the first end of which is connected to the oil discharge port 102; , the oil sucking channel is provided with an air inlet and an exhaust port, the venturi pipe 402 is also provided with a connecting part 4021, the connecting part 4021 is provided with an oil sucking port that communicates with the oil sucking channel, and the second end of the oil sucking pipe 401 is connected to the oil sucking mouth.

In this embodiment, according to the principle of the Venturi effect, where the flow rate is fast, the pressure is low, and the pressure in the gas-liquid separator 100 is greater than the pressure at the connection part 4021 of the oil-suction passage, and the pressure between the gas-liquid separator 100 and the oil-suction passage A pressure difference is formed, the first end of the oil suction pipe 401 is connected to the oil discharge port 102, and the second end of the oil suction pipe 401 is connected to the oil suction port. Due to the existence of the pressure difference, the Venturi pipe 402 smoothly removes the oil from the gas-liquid separator 100. draw out.

Embodiment 4:

As shown in FIG. 2, in the above-mentioned embodiment, the compressor 200 further has an exhaust end 202; the air conditioning unit further includes: a first connection pipe 500, the first end of the first connection pipe 500 is connected to the exhaust end 202, the first The second end of the connecting pipe 500 is connected to the air inlet; the first end of the second connecting pipe 600 is connected to the exhaust port, and the second end of the second connecting pipe 600 is connected to the air inlet 201 .

In this embodiment, the first end of the first connecting pipe 500 is connected to the exhaust end 202, the second end of the first connecting pipe 500 is connected to the air inlet, the compressor 200 sends the exhaust gas into the air inlet, and the air conditioning unit Usually includes a compressor 200, the air conditioning unit of the present application does not require an external air source, and the venturi 402 is provided with flowing gas through the gas circulation of the compressor. In addition, the first end of the second connecting pipe 600 is connected to the exhaust port, and the second The second end of the connecting pipe 600 is connected to the intake end 201 , so that the oil discharged from the exhaust port can be returned to the compressor 200 to ensure the normal operation of the compressor 200 .

Specifically, the present application draws on the principle of ejecting oil from the evaporator. By adding a Venturi tube 402, the Venturi ejection principle is used to provide the power to drain oil, which can ensure smooth oil return no matter how small the pressure difference is. The principle of Venturi ejection: the inflow of high-pressure gas from the power side of the venturi tube 402 will cause a local negative pressure to be formed on the ejected side, thereby driving the liquid on the ejected side to flow into the venturi tube 402 and mix with the high-pressure gas from the venturi. Tube 402 exits.

In the above embodiment, the Venturi tube 402 effect occurs when the gas flows through the oil suction channel, that is, a low pressure area is generated near the gas flowing at a high speed, and a pressure difference is formed between the air inlet and the connecting part 4021, so that the Venturi tube 402 has a pumping effect. Suction, the oil is smoothly pumped out of the gas-liquid separator 100.

Embodiment 5:

As shown in FIG. 2 , in the above embodiment, the air conditioning unit further includes: a solenoid valve 300 , which is arranged on the oil pumping pipe 401 .

In this embodiment, the solenoid valve 300 is provided on the oil pumping pipe 401, and can be changed according to the working conditions, such as changes in water temperature, ambient temperature, load of the compressor 200, etc., through the on-off of the solenoid valve 300 or the opening size of the solenoid valve 300, Controlling the oil discharge amount of the oil discharge port 102 will not cause too much refrigerant to return to the compressor 200 together with the oil, so as to ensure the normal operation of the compressor 200 and even the entire air conditioning unit. The existence of the solenoid valve 300 can monitor the parameters of the compressor 200 to control the on-off of the solenoid valve 300, which ensures the adjustability of the oil return amount.

Embodiment 6:

2 and 3, in another specific embodiment of the first embodiment, the oil sucking assembly 400 includes: a third connecting pipe 403, the first end of the third connecting pipe 403 is connected to the oil discharge port 102; the pump body 404, The pump body 404 has a suction part, the second end of the third connecting pipe 403 is connected to the suction part, and the pump body provides suction force; the pump body provides suction force to extract oil from the gas-liquid separator 100 .

Further, the pump body 404 also has an exhaust part; the oil pumping assembly 400 further includes: a fourth connection pipe 405, the first end of the fourth connection pipe 405 is connected to the exhaust part, and the second end of the fourth connection pipe 405 is connected to the inlet Gas end 201.

After the pump body 404 extracts the oil, it is transported to the compressor 200 for the normal operation of the compressor 200, so that the oil can be circulated in the system and the waste of oil is avoided.

Embodiment 7:

As shown in FIG. 2 , in the above embodiment, the oil discharge port 102 is provided at the lowest position of the gas-liquid separator 100 along the vertical line direction.

In this embodiment, the air-conditioning unit is in the direction of the vertical line, and the oil discharge port 102 is set at the lowest position of the gas-liquid separator 100, and the oil in the gas-liquid separator 100 converges to the oil discharge port 102, which speeds up the oil discharge. High efficiency, so that the oil can be smoothly discharged from the gas-liquid separator 100, and the waste of oil can be avoided.

Embodiment 8:

As shown in FIG. 2 , in the above embodiment, the first wall surface of the gas-liquid separator 100 is configured as a curved surface, and the first wall surface is provided with an oil discharge port 102; The lowest wall in the line direction.

In this embodiment, the first wall surface is the lowest wall surface of the gas-liquid separator 100 along the vertical line, the first wall surface of the gas-liquid separator 100 is a curved surface, and an oil discharge port 102 is provided on the curved surface to separate the gas and liquid. The oil in the gas-liquid separator 100 is collected more quickly and quickly to the oil discharge port 102, which speeds up the efficiency of oil discharge, enables the oil to be discharged from the gas-liquid separator 100 smoothly, and avoids waste of oil.

Embodiment 9:

As shown in FIG. 2, in a specific embodiment of the first embodiment, the gas-liquid separator 100 is provided with an air outlet; the air-conditioning unit further includes: a fifth connecting pipe 700, the first end of which is connected to the air outlet , the second end of the fifth connecting pipe 700 is connected to the intake end 201 .

In this embodiment, the first end of the fifth connection pipe 700 is connected to the air outlet, the second end of the fifth connection pipe 700 is connected to the air inlet end 201 , and the oil in the gas-liquid separator 100 can be discharged from the oil discharge port 102 . The separated gas is sent to the compressor 200 through the fifth connecting pipe 700 .

When the air-conditioning unit of the present application returns oil normally, the oil return process is: the oil-liquid mixture or oil in the gas-liquid separator 100 flows through the solenoid valve 300 and the Venturi tube 402, and finally returns to the compressor 200; or the gas-liquid separation The oil-liquid mixture or oil in the compressor 100 flows through the solenoid valve 300 and the pump body 404, and finally returns to the compressor 200, wherein the Venturi tube 402 and the pump body 404 provide suction force, so that the oil is removed from the gas-liquid separator 100 Return to the compressor 200 . When the compressor 200 does not need to return oil, the solenoid valve 300 is powered off, and the oil-liquid mixture or oil remains in the gas-liquid separator 100 .

In this application, the term "plurality" refers to two or more, unless expressly defined otherwise. The terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be It is directly connected or indirectly connected through an intermediary. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiment", etc. means that a particular feature, structure, material or characteristic described in connection with the embodiment or example is included in this application at least one embodiment or example of . In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or instance. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims

An air conditioning unit, comprising:

a gas-liquid separator, the gas-liquid separator is provided with an oil discharge port;

An oil sucking assembly is connected to the gas-liquid separator and the gas-liquid separator, the oil sucking assembly is provided with an oil sucking channel, the oil sucking channel is connected with the oil discharge port, and the oil sucking assembly provides a suction force.
The air-conditioning unit according to claim 1, wherein the air-conditioning unit further comprises:

The compressor has an intake end, and the oil suction passage communicates with the intake end.
The air conditioning unit of claim 2, wherein the oil extraction assembly comprises:

an oil sucking pipe, the first end of the oil sucking pipe is connected to the oil discharge port;

The Venturi tube is provided with the oil sucking channel, the oil sucking channel is provided with an air inlet and an exhaust port, the Venturi tube is also provided with a connecting part, and the connecting part is provided with The oil sucking port is communicated with the oil sucking channel, and the second end of the oil sucking pipe is connected to the oil sucking port.
The air conditioning unit of claim 3, wherein the compressor further has a discharge end;

The air-conditioning unit also includes:

a first connecting pipe, the first end of the first connecting pipe is connected to the exhaust end, and the second end of the first connecting pipe is connected to the air inlet;

A second connecting pipe, the first end of the second connecting pipe is connected to the exhaust port, and the second end of the second connecting pipe is connected to the intake end.
The air-conditioning unit according to claim 3, wherein the air-conditioning unit further comprises:

The solenoid valve is arranged on the oil sucking pipe.
The air conditioning unit of claim 2, wherein the oil extraction assembly comprises:

a third connecting pipe, the first end of the third connecting pipe is connected to the oil discharge port;

A pump body, the pump body has a suction part, the second end of the third connecting pipe is connected to the suction part, and the pump body provides suction force.
The air conditioning unit according to claim 6, wherein the pump body further has an exhaust part;

The oil sucking assembly also includes:

a fourth connection pipe, the first end of the fourth connection pipe is connected to the exhaust part, and the second end of the fourth connection pipe is connected to the intake end.
The air-conditioning unit according to any one of claims 1 to 7, wherein the oil discharge port is provided at the lowest position of the gas-liquid separator along the direction of the vertical line.
The air conditioning unit according to claim 8, wherein the first wall surface of the gas-liquid separator is configured as a curved surface, and the oil discharge port is provided on the first wall surface;

The first wall surface is the lowest wall surface of the gas-liquid separator along the vertical line direction.
The air-conditioning unit according to any one of claims 2 to 7, wherein the gas-liquid separator is provided with an air outlet;

The air-conditioning unit also includes:

A fifth connecting pipe, the first end of the fifth connecting pipe is connected to the air outlet, and the second end of the fifth connecting pipe is connected to the air inlet end.