Quantitative refrigerant adding device

Abstract

The utility model relates to a refrigerant quantitative adding device which comprises a cabinet body, the cabinet body is provided with a front door, windows are arranged on the upper portions of the two transverse side walls of the cabinet body, shutters are hinged to the windows, an installation column is fixedly connected to the bottom wall of the cabinet body, a refrigerant storage tank is fixedly connected to the rear side of the upper section of the installation column, the refrigerant storage tank is in a cylinder shape and is arranged in the transverse direction, and the installation column is fixedly connected with the installation column. The refrigerant storage tank is located between the two windows, the two ends of the refrigerant storage tank face the two windows respectively, an air inlet valve and an air outlet valve are arranged on the top wall of the refrigerant storage tank and distributed in the transverse direction, a barometer is arranged at the position of the air outlet valve, and a drying tank is fixedly connected to the lower section of the mounting column and is in a cylinder shape. And the drying tank is vertically arranged. The refrigerant adding device can accurately control the adding amount of refrigerants.

Description

Technical Field

[0001] This utility model relates to the field of refrigerant addition technology, specifically to a refrigerant metering device. Background Technology

[0002] When an air conditioner is in cooling mode, low-temperature, low-pressure refrigerant gas is drawn into the compressor and pressurized into high-temperature, high-pressure refrigerant gas. This high-temperature, high-pressure refrigerant gas then releases heat in the outdoor heat exchanger after passing through the condenser, becoming a medium-temperature, high-pressure liquid. This medium-temperature, high-pressure liquid then expands and decreases in pressure through the capillary tube, becoming a low-temperature, low-pressure liquid. This low-temperature, low-pressure liquid refrigerant then absorbs heat and evaporates in the evaporator, becoming a low-temperature, low-pressure gas. This low-temperature, low-pressure refrigerant gas is then drawn into the compressor again, and the cycle continues.

[0003] The most common working media in traditional industry and daily life are partially halogenated hydrocarbons (especially chlorofluorocarbons), but they are gradually being phased out because they contribute to ozone layer depletion. Ammonia is currently the most widely used medium-pressure, medium-temperature refrigerant. Ammonia has a freezing point of -77.7℃ and a standard evaporation temperature of -33.3℃. Its condensation pressure at room temperature is typically 1.1–1.3 MPa, and even when the cooling water temperature reaches 30℃ in summer, it will never exceed 1.5 MPa. The standard volumetric refrigeration capacity of ammonia is approximately 520 kcal / m³.

[0004] The amount of refrigerant in an air conditioning system is strictly controlled. Insufficient or excessive refrigerant will affect the cooling performance of the system. Therefore, the process of adding refrigerant requires precise control of the amount added. Currently, refrigerant is typically added to the air conditioning system by filling containers. This method requires workers to use pressure gauges and flow meters, and rely on their personal experience to control the amount added, which has limited accuracy. Utility Model Content

[0005] The purpose of this invention is to provide a refrigerant metering device that can accurately control the amount of refrigerant added.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A refrigerant metering device includes a cabinet with a front door. Windows are located above the upper sides of both transverse side walls of the cabinet, and these windows are hinged with louvers. A mounting column is fixed to the bottom wall of the cabinet. A refrigerant storage tank, cylindrical in shape, is fixed to the upper rear side of the mounting column. The refrigerant storage tank is positioned transversely between the two windows, with its two ends facing the windows respectively. An inlet valve and an outlet valve are located on the top wall of the refrigerant storage tank, distributed transversely. A pressure gauge is located at the outlet valve. A drying tank, also cylindrical and vertically oriented, is fixed to the lower section of the mounting column. The outlet valve is connected to the drying tank... The top is connected by a pipe. A flow control valve is fixed to the front side of the upper section of the mounting column. The flow control valve is set vertically and has a flow adjustment screw at the top. The flow control valve is equipped with a flow meter. A touch screen is installed on the outer wall of the front door, and a control system is installed on the inner wall of the front door. The barometer, flow control valve and touch screen are all connected to the control system. An inflation connector is installed through the front door. The inner end of the inflation connector is connected to the air outlet of the flow control valve through a pipe. A mounting bracket is fixed to the inner side of the window frame of one of the louvers. Multiple exhaust fan modules are fixed to the mounting bracket. A gas concentration sensor is installed on the top wall of the cabinet cavity. The gas concentration sensor and the exhaust fan modules are both connected to the control system.

[0008] Specifically, a flange is fixed to the bottom of the mounting column, and the flange is fixed to the bottom wall of the cabinet cavity by screws.

[0009] Specifically, the top wall of the refrigerant storage tank is provided with a slag removal port, and a sealing cover is threadedly connected to the slag removal port.

[0010] Specifically, a protective mesh cover is fixed to the outside of the louver frame.

[0011] Specifically, the refrigerant storage tank is fixedly connected to a tank mounting plate, which is then installed on the mounting column by means of hoops.

[0012] Specifically, there are eight exhaust fan modules, which are arranged in an array.

[0013] Specifically, the mounting bracket has eight mounting holes, and the exhaust fan module is fixed to the edge of the mounting holes.

[0014] Specifically, the flow control valve is mounted to the mounting column by means of a clamp.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] Ammonia refrigerant flowing from the drying tank enters the flow control valve via a pipeline. The outlet of the flow control valve is connected to the inner end of the charging connector via a pipeline. The flow meter installed in the flow control valve accurately measures the output ammonia refrigerant flow rate. When the flow rate reaches the amount preset on the screen, the control system closes the flow control valve, stopping the refrigerant output. By pre-setting the refrigerant addition amount on the touchscreen and controlling the opening and closing of the flow control valve via the controller, the amount of refrigerant added can be accurately controlled. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 External view of the refrigerant metering device;

[0019] Figure 2 Internal view of the refrigerant metering device;

[0020] Figure 3 Internal view of the refrigerant metering device;

[0021] Figure 4 for Figure 3 A partial view.

[0022] In the picture:

[0023] 1. Front door; 11. Touch screen; 12. Inflation connector;

[0024] 2. Venetian blinds; 21. Mounting bracket; 22. Exhaust fan module; 23. Protective mesh cover;

[0025] 3. Install the column;

[0026] 4. Refrigerant storage tank; 41. Inlet valve; 42. Outlet valve; 421. Pressure gauge; 43. Sealing cover; 44. Storage tank mounting plate;

[0027] 5. Drying container;

[0028] 6. Flow control valve; 61. Flow regulating screw; 62. Flow meter. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0030] See Figures 1 to 4 A refrigerant metering device includes a cabinet with a front door 1. Windows are located on the upper part of both horizontal side walls of the cabinet, and each window is hinged with louvers 2. A mounting column 3 is fixed to the bottom wall of the cabinet. A refrigerant storage tank 4 is fixed to the rear side of the upper section of the mounting column 3. The refrigerant storage tank 4 is cylindrical and positioned horizontally between the two windows, with its two ends facing the two windows respectively.

[0031] The top wall of the refrigerant storage tank 4 is equipped with an inlet valve 41 and an outlet valve 42, which are distributed laterally. A pressure gauge 421 is installed at the outlet valve 42. A drying tank 5 is fixedly connected to the lower section of the mounting column 3. The drying tank 5 is cylindrical and vertically arranged. The outlet valve 42 is connected to the top of the drying tank 5 through a pipe.

[0032] A flow control valve 6 is fixedly connected to the upper front side of the mounting column 3. The flow control valve 6 is vertically arranged, and a flow regulating screw 61 is provided at the top of the flow control valve 6. The flow control valve 6 is equipped with a flow meter 62, and a touch screen 11 is provided on the outer wall of the front door 1. A control system is provided on the inner wall of the front door 1, and the barometer 421, the flow control valve 6, and the touch screen 11 are all connected to the control system. An inflation connector 12 is provided through the front door 1, and the inner end of the inflation connector 12 is connected to the air outlet of the flow control valve 6 through a pipe.

[0033] One of the blinds 2 has a mounting bracket 21 fixed to the inside of its frame. Multiple exhaust fan modules 22 are fixed to the mounting bracket 21. A gas concentration sensor is installed on the top wall of the cabinet cavity. Both the gas concentration sensor (not shown in the figure) and the exhaust fan modules 22 are connected to the control system.

[0034] Specifically, a flange is fixed to the bottom of the mounting column 3, and the flange is fixed to the bottom wall of the cabinet cavity by screws.

[0035] Specifically, the top wall of the refrigerant storage tank 4 is provided with a slag removal port, and a sealing cover 43 is threadedly connected to the slag removal port.

[0036] Specifically, a protective mesh cover 23 is fixed to the outside of the window frame of the louver 2.

[0037] Specifically, the refrigerant storage tank 4 is fixedly connected to a storage tank mounting plate 44, which is installed on the mounting column 3 by means of a clamp.

[0038] Specifically, there are eight exhaust fan modules 22, which are arranged in an array.

[0039] Specifically, the mounting bracket 21 has eight mounting holes, and the exhaust fan module 22 is fixed to the edge of the mounting holes.

[0040] Specifically, the flow control valve 6 is installed on the mounting column 3 by means of a clamp.

[0041] The working principle of this utility model is as follows:

[0042] Compressed liquid ammonia gas is fed into refrigerant storage tank 4 via inlet valve 41. When ammonia refrigerant needs to be added to the air conditioner, a pipe is used to connect the air conditioner refrigerant inlet (not shown in the figure) to the outer end of the charging connector 12 (see figure). Figure 1 Connect the device, then set the refrigerant addition amount on the touchscreen 11 and press the start button.

[0043] Subsequently, the ammonia refrigerant flows out through the outlet valve 42 and then into the drying tank 5 via pipe A. Ammonia has excellent hygroscopic properties; even at low temperatures, water will not precipitate from the ammonia liquid and freeze, thus preventing "ice blockage" in the system. Ammonia does not corrode steel, but the presence of moisture in the ammonia liquid can corrode copper and copper alloys, and slightly increase the evaporation temperature. Therefore, the water content in ammonia is specified to be no more than 0.2%. The ammonia refrigerant passes through the drying tank 5, which removes the moisture.

[0044] The ammonia refrigerant flowing out of the drying tank 5 flows into the flow control valve 6 through pipeline B. The outlet of the flow control valve 6 ( Figure 4 (at point C) and the inner end of the inflation connector 12 (see...) Figure 2 The flow control valve 6 is connected via a pipe (not shown in the figure). The flow meter 62 installed in the flow control valve 6 accurately measures the output ammonia refrigerant flow rate. When the flow rate reaches the amount set on the screen, the control system controls the flow control valve 6 to close, stopping the refrigerant output. By pre-setting the refrigerant addition amount on the touch screen 11 and controlling the opening and closing of the flow control valve 6 through the controller, the amount of refrigerant added can be accurately controlled.

[0045] The barometer 421 is used to sense the pressure inside the refrigerant tank 4 in order to sense the remaining amount of refrigerant in the refrigerant tank 4. If the remaining amount is insufficient, a prompt will be displayed on the touch screen 11.

[0046] A gas concentration sensor (not shown in the figure) is installed on the top wall of the cabinet cavity. If the gas concentration sensor detects that the ammonia concentration at the top of the cabinet cavity is too high, it will feed back to the control system. The control system will then control the exhaust fan module 22 to turn on and promptly extract the leaked ammonia.

[0047] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A refrigerant metering device, characterized in that: The system includes a cabinet with a front door. Windows are located above the upper sides of both horizontal walls of the cabinet, and these windows are hinged with louvers. A mounting column is fixed to the bottom wall of the cabinet. A refrigerant tank, cylindrical in shape, is fixed to the upper rear side of the mounting column. The refrigerant tank is positioned horizontally between the two windows, with its two ends facing the windows respectively. An inlet valve and an outlet valve are located on the top wall of the refrigerant tank, distributed horizontally. A pressure gauge is located at the outlet valve. A dryer, also cylindrical and vertically positioned, is fixed to the lower section of the mounting column. The outlet valve is connected to the top of the dryer via a pipe. The system is connected to the upper front section of the mounting column, where a flow control valve is fixedly attached. The flow control valve is vertically positioned and has a flow adjustment screw at its top. The flow control valve is equipped with a flow meter. A touch screen is located on the outer wall of the front door, and a control system is located on the inner wall of the front door. The barometer, flow control valve, and touch screen are all connected to the control system. An inflation connector is installed through the front door, and the inner end of the inflation connector is connected to the air outlet of the flow control valve via a pipe. A mounting bracket is fixedly attached to the inner side of the frame of one of the louvers, and multiple exhaust fan modules are fixedly attached to the mounting bracket. A gas concentration sensor is located on the top wall of the cabinet's inner cavity, and both the gas concentration sensor and the exhaust fan modules are connected to the control system.

2. The refrigerant metering device according to claim 1, characterized in that: A flange is fixed to the bottom of the mounting column, and the flange is fixed to the bottom wall of the cabinet cavity by screws.

3. The refrigerant metering device according to claim 1, characterized in that: The top wall of the refrigerant storage tank is equipped with a slag removal port, and a sealing cover is threaded onto the slag removal port.

4. The refrigerant metering device according to claim 1, characterized in that: The window frame of the louver is fixed with a protective mesh cover.

5. The refrigerant metering device according to claim 1, characterized in that: The refrigerant storage tank is fixedly connected to a tank mounting plate, which is then installed on the mounting column by clamps.

6. The refrigerant metering device according to claim 1, characterized in that: There are eight exhaust fan modules, which are arranged in an array.

7. The refrigerant metering device according to claim 6, characterized in that: The mounting bracket has eight mounting holes, and the exhaust fan module is fixed to the edge of the mounting holes.

8. The refrigerant metering device according to claim 1, characterized in that: The flow control valve is mounted to the mounting column by means of a clamp.

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