Outdoor unit safety device of air conditioning system

Abstract

The utility model relates to the technical field of refrigerating systems, and provides an outdoor unit safety device of an air conditioning system.The outdoor unit safety device comprises a low-pressure barrel, a connecting pipe, a pump, a liquid discharging pipe and a flow valve, the low-pressure barrel communicates with the pump through the connecting pipe, one end of the connecting pipe is connected with the liquid inlet end of the pump, and the other end of the connecting pipe is connected with the liquid discharging pipe; the liquid discharging pipe is connected to the liquid outlet end of the pump and used for discharging Freon to an outdoor unit for refrigeration. The flow valve is arranged on the liquid discharge pipe and is used for adjusting the flow of the liquid discharge pipe; the device further comprises a backflow pipe and a control valve, one end of the backflow pipe is connected with the low-pressure barrel, the other end of the backflow pipe is communicated with the liquid discharging pipe, the end, connected with the liquid discharging pipe, of the backflow pipe is located between the flow valve and the liquid outlet end of the pump, and the control valve is connected to the backflow pipe and used for controlling the flow of the backflow pipe. The utility model has the effect of improving the safety of the pump in the use process.

Description

Technical Field

[0001] The present application relates to the technical field of refrigeration systems, and particularly to an outdoor unit safety device for an air conditioning system. Background Art

[0002] A cold storage refers to a device that uses artificial means to create an environment with a temperature or humidity different from that outdoors, and is also a constant temperature and humidity storage device for items such as food, liquids, chemicals, pharmaceuticals, vaccines, and scientific experiments. Cold storages are usually located near transportation ports or the place of origin. Compared with refrigerators, cold storages have a larger refrigeration area and the same refrigeration principle.

[0003] Generally, most cold storages are refrigerated by screw refrigeration units, using liquids with very low vaporization temperatures (ammonia or freon) as coolants, allowing them to evaporate under low pressure and mechanical control conditions, absorbing the heat in the storage warehouse, thereby achieving the purpose of cooling and temperature reduction.

[0004] A cold storage mainly includes an outdoor unit and an indoor unit. The indoor unit is installed inside the cold storage, and the outdoor unit is installed inside the control room. When the indoor unit (evaporator) operates, it will discharge low-temperature and low-pressure dry saturated freon vapor. The low-temperature and low-pressure dry saturated freon vapor will be reconverted into high-pressure and normal-temperature freon liquid through the outdoor unit, and the high-pressure and normal-temperature freon liquid will re-enter the indoor unit for heat exchange, thereby achieving the effect of refrigerating the cold storage.

[0005] Among them, a low-pressure barrel is provided on the outdoor unit. The liquid in the low-pressure barrel needs to be pumped out by a pump and transported to the end of the outdoor unit. The pump and the outdoor unit are connected by a pipeline.

[0006] In view of the above related technologies, a flow valve will be set on the pipeline connecting the end of the pump. If the flow valve is accidentally closed and the staff does not discover it in time, it may cause the pump to run idly for a long time. When the pump runs idly for a long time, it will generate high temperature, which may burn out the pump, presenting certain safety hazards, so it needs to be improved. Utility Model Content

[0007] In order to improve the safety of the pump during use, the present application provides an outdoor unit safety device for an air conditioning system.

[0008] An outdoor unit safety device for an air conditioning system provided by the present application adopts the following technical solutions:

[0009] An outdoor unit safety device for an air conditioning system includes a low-pressure barrel, a connecting pipe, a pump, a liquid discharge pipe, and a flow valve. The low-pressure barrel is communicated with the pump through the connecting pipe. One end of the connecting pipe is connected to the liquid inlet end of the pump. The liquid discharge pipe is connected to the liquid outlet end of the pump, and the liquid discharge pipe is used to discharge freon for outdoor unit refrigeration. The flow valve is arranged on the liquid discharge pipe and is used to adjust the flow rate of the liquid discharge pipe.

[0010] It further includes a return pipe and a control valve. One end of the return pipe is connected to the low-pressure barrel, and the other end is communicated with the drain pipe. The end of the return pipe connected to the drain pipe is located between the flow valve and the liquid outlet end of the pump. The control valve is connected to the return pipe and is used to control the flow rate of the return pipe.

[0011] By adopting the above technical solution, when the drain pipe is closed, the liquid outlet end of the pump can be circularly communicated with the low-pressure barrel, so that the Freon liquid can continuously cool the pump, reducing the possibility of the pump temperature rising and improving the use safety.

[0012] Preferably, it further includes a filter. The filter is arranged on the connecting pipe and is used to filter impurities.

[0013] By adopting the above technical solution, the filter can filter out impurities in the Freon, reducing the possibility of the pipeline being blocked by impurities.

[0014] Preferably, it further includes a flow pipe. One end of the flow pipe is communicated with the low-pressure barrel, and the other end is communicated with the drain pipe. The flow pipe and the return pipe are arranged in sequence along the fluid transportation direction of the drain pipe, and the diameter of the flow pipe is smaller than that of the drain pipe.

[0015] By adopting the above technical solution, when the return pipe is also blocked, the liquid outlet end of the pump can still communicate with the low-pressure barrel through the flow pipe to realize the cooling of the pump.

[0016] Preferably, it further includes a regulating valve. The regulating valve is arranged on the connecting pipe and is used to regulate the flow rate in the connecting pipe.

[0017] By adopting the above technical solution, the staff can reasonably control the flow rate of Freon in the connecting pipe through the regulating valve.

[0018] Preferably, anti-corrosion layers are provided on the inner walls of the connecting pipe and the drain pipe.

[0019] By adopting the above technical solution, the anti-corrosion layers can increase the corrosion resistance of the connecting pipe and the drain pipe and extend the service life.

[0020] Preferably, it further includes a support frame and a support plate. The support plate is connected to the support frame and is provided with an arc-shaped groove. The arc-shaped groove is adapted to the outer wall of the low-pressure barrel, and the low-pressure barrel is connected to the support frame.

[0021] By adopting the above technical solution, the support frame, as a carrier, is fixedly installed on the ground, and the support plate can support the low-pressure barrel. At the same time, the arc-shaped groove can be well fitted with the low-pressure barrel to increase the contact area and improve the stability of the low-pressure barrel.

[0022] Preferably, a plurality of the support plates are arranged in parallel, and the support plates together are used to support the low-pressure barrel.

[0023] By adopting the above technical solution, multiple support plates can support the low-pressure barrel at multiple points, further improving the connection stability of the low-pressure barrel.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] (1) By providing a return pipe and a control valve, when the drain pipe is closed, the liquid outlet end of the pump can be cyclically communicated with the low-pressure barrel, so that the Freon liquid can continuously cool the pump, reducing the possibility of the pump temperature rising.

[0026] (2) By providing a filter, the filter can filter out impurities in the Freon, reducing the possibility of the pipeline being blocked by impurities.

[0027] (3) By providing a flow pipe, when the return pipe is also blocked, the liquid outlet end of the pump can also communicate with the low-pressure barrel through the flow pipe to complete the cooling of the pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural diagram of the safety device in the embodiment of the present application;

[0029] Figure 2 is a schematic structural diagram of a part of the safety device in the embodiment of the present application;

[0030] Figure 3 is a schematic structural diagram of the safety device in another embodiment of the present application.

[0031] Reference numerals: 1, support frame; 2, support plate; 3, low-pressure barrel; 4, connecting pipe; 5, pump; 6, drain pipe; 7, flow valve; 8, arc groove; 9, regulating valve; 10, return pipe; 11, control valve; 12, filter; 13, flow pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] Next, the technical solutions of the present application will be described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can be embodied in many different forms and is not limited to the embodiments described herein.

[0033] In the description of the present application, the expressions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics represented in connection with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials, or characteristics represented can be combined in a suitable manner in any one or more embodiments or examples.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the description and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0035] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection; it can also be a detachable connection; or integrated; it can also be a mechanical connection. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0036] The following will describe in detail some embodiments of the present application with reference to the accompanying drawings. Without conflict, those skilled in the art can combine and combine the different embodiments or examples represented in the present application and the features of different embodiments or examples.

[0037] The embodiments of the present application disclose an outdoor unit safety device for an air conditioning system. Referring to Figure 1 and Figure 2 , the safety device includes a support frame 1, a support plate 2, a low-pressure barrel 3, a connecting pipe 4, a pump 5, a drain pipe 6, and a flow valve 7. The support frame 1 serves as a carrier and is fixedly installed on the ground. The support plate 2 is fixedly connected to the support frame 1 and is provided with an arc-shaped groove 8, and the arc-shaped groove 8 is adapted to the outer side wall of the low-pressure barrel 3. The arc-shaped groove 8 can fit well with the low-pressure barrel 3, increasing the contact area between the support plate 2 and the low-pressure barrel 3 and improving the stability of the low-pressure barrel 3. As shown in the figure, a plurality of support plates 2 are arranged in parallel, and each support plate 2 is jointly used to support the low-pressure barrel 3. Multiple support plates 2 can achieve multi-point support for the low-pressure barrel 3, further improving the connection stability of the low-pressure barrel 3.

[0038] The low-pressure barrel 3 is connected to the pump 5 through the connecting pipe 4. One end of the connecting pipe 4 is connected to the liquid inlet end of the pump 5. A regulating valve 9 is also installed on the connecting pipe 4, and the regulating valve 9 is used to adjust the flow rate in the connecting pipe 4. The drain pipe 6 is connected to the liquid outlet end of the pump 5, and the drain pipe 6 is used to discharge the refrigerant to the outdoor unit for refrigeration. A flow valve 7 is installed on the drain pipe 6 and is used to adjust the flow rate of the drain pipe 6. As shown in the figure, in this embodiment, several groups of connecting pipes 4, pumps 5, and drain pipes 6 are provided. Among them, anti-corrosion layers are provided on the inner walls of the connecting pipe 4 and the drain pipe 6, and the anti-corrosion layers are coated with epoxy resin paint. The anti-corrosion layer can increase the corrosion resistance of the connecting pipe 4 and the drain pipe 6 and extend the service life.

[0039] Specifically, a return pipe 10 is also connected to the drain pipe 6. Both ends of the return pipe 10 are respectively connected to the low-pressure barrel 3 and the drain pipe 6, and the end of the return pipe 10 connected to the drain pipe 6 is located between the flow valve 7 and the liquid outlet end of the pump 5. Among them, a control valve 11 is also connected to the return pipe 10, and the control valve 11 is used to control the flow rate of the return pipe 10. When the flow valve 7 on the drain pipe 6 is closed, the liquid outlet end of the pump 5 can be connected to the low-pressure barrel 3 in a cycle, so that the refrigerant liquid can continuously cool the pump 5, reducing the possibility of the temperature of the pump 5 rising and improving the use safety.

[0040] In addition, a filter 12 is installed between the low-pressure barrel 3 and the pump 5. The filter 12 is arranged on the connecting pipe 4 and is used to filter the refrigerant liquid in the connecting pipe 4. By filtering out the impurities in the refrigerant liquid, the filter 12 reduces the possibility of the pipeline being blocked by impurities.

[0041] In some embodiments, please refer to Figure 3 , a flow pipe 13 is also connected to the drain pipe 6. One end of the flow pipe 13 is connected to the low-pressure barrel 3, and the other end is connected to the drain pipe 6. The flow pipe 13 and the return pipe 10 are arranged in sequence along the fluid transportation direction of the drain pipe 6, and the diameter of the flow pipe 13 is smaller than that of the drain pipe 6. When the return pipe 10 is also blocked, the liquid outlet end of the pump 5 can still communicate with the low-pressure barrel 3 through the flow pipe 13 to achieve the cooling of the pump 5.

[0042] The implementation principle of the outdoor unit safety device of an air-conditioning system in this application embodiment is as follows: The refrigerant liquid in the low-pressure barrel 3 flows along the connecting pipe 4 to the drain pipe 6 under the action of the pump 5 and is transported to the end of the outdoor unit for refrigeration. When the flow valve 7 on the drain pipe 6 is closed, the liquid outlet end of the pump 5 can be connected to the low-pressure barrel 3 in a cycle, so that the refrigerant liquid can continuously cool the pump 5, reducing the possibility of the temperature of the pump 5 rising and improving the use safety.

[0043] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. An outdoor unit safety device for an air conditioning system, characterized in that: The invention comprises a low-pressure barrel (3), a connecting pipe (4), a pump (5), a discharge pipe (6) and a flow valve (7), wherein the low-pressure barrel (3) is connected to the pump (5) via the connecting pipe (4), one end of the connecting pipe (4) is connected to the liquid inlet end of the pump (5), the discharge pipe (6) is connected to the liquid outlet end of the pump (5), and the discharge pipe (6) is used to discharge Freon to an external refrigeration machine; the flow valve (7) is arranged on the discharge pipe (6) and is used to adjust the flow of the discharge pipe (6); It also includes a return pipe (10) and a control valve (11), one end of the return pipe (10) is connected to the low-pressure barrel (3), and the other end is communicated with the discharge pipe (6), the end of the return pipe (10) connected to the discharge pipe (6) is located between the flow valve (7) and the liquid outlet end of the pump (5), and the control valve (11) is connected to the return pipe (10) and is used to control the flow of the return pipe (10).

2. The outdoor unit safety device of an air conditioning system according to claim 1, characterized in that: It also comprises a filter (12), wherein the filter (12) is arranged on the connecting pipe (4) and is used to filter impurities.

3. The outdoor unit safety device of an air conditioning system according to claim 1, characterized in that: It also comprises a flow tube (13), one end of which is connected to the low-pressure barrel (3), and the other end of which is connected to the drainage pipe (6); the flow tube (13) and the return pipe (10) are arranged in sequence along the fluid conveying direction of the drainage pipe (6), and the diameter of the flow tube (13) is smaller than the diameter of the drainage pipe (6).

4. The outdoor unit safety device of an air conditioning system according to claim 1, characterized in that: It also comprises a regulating valve (9), which is arranged on the connecting pipe (4) and is used to regulate the flow rate in the connecting pipe (4).

5. The outdoor unit safety device of an air conditioning system according to claim 1, characterized in that: The connecting pipe (4), the pump (5) and the drainage pipe (6) are each provided with a plurality of them.

6. The outdoor unit safety device of an air conditioning system according to claim 1, characterized in that: The inner walls of the connecting pipe (4) and the drain pipe (6) are both provided with an anti-corrosion layer.

7. The outdoor unit safety device of an air conditioning system according to claim 1, characterized in that: It also includes a support frame (1) and a support plate (2), wherein the support plate (2) is connected to the support frame (1) and is provided with an arc-shaped groove (8), wherein the arc-shaped groove (8) is adapted to the outer wall of the low-pressure barrel (3), and the low-pressure barrel (3) is connected to the support frame (1).

8. The outdoor unit safety device of an air conditioning system according to claim 7, characterized in that: A plurality of the support plates (2) are arranged in parallel, and each of the support plates (2) is used to support the low-pressure barrel (3).

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