Refrigerator motor junction box protection device

Abstract

The utility model belongs to a refrigerator motor junction box protection device in the technical field of refrigerators. Comprising a junction box body (1), the top of the junction box body (1) is communicated with the lower end of an air inlet pipeline (2), the bottom of the junction box body (1) is communicated with one end of an exhaust pipeline (3), the upper end of the air inlet pipeline (2) is communicated with a nitrogen supply component (4), and the other end of the exhaust pipeline (3) is communicated with a nitrogen recovery component (5). According to the refrigerator motor junction box protection device, the condensation phenomenon in the junction box is avoided, the explosion risk caused by the short circuit of the outgoing line insulating sleeve is avoided, the failure rate is reduced, the equipment safety is improved, the replacement cost caused by the short circuit fault of the motor junction box is saved, and the cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of refrigerators, and more specifically relates to a protective device for a refrigerator motor junction box. Background Art

[0002] The purpose of dehumidification blasting is to remove moisture from the blast furnace blast, reduce the humidity of the air entering the blast furnace blower to the value required for optimal operation, and maintain a stable technology. The process flow includes three major system processes: gas circuit, cold water, and cooling water. Among them, the cooling water system: the cooling water is sent to the refrigerator by the external centralized circulating cooling water system, and then returns to the external centralized circulating cooling water system after the condenser is heated up for recycling. When the refrigerator is running, the cold air is transmitted to the insulating sleeve of the motor lead wire. The gaseous water in the air condenses into water when it is cold and adheres to the insulating sleeve in the junction box. Once the condensation generated is less than the creepage distance between the charged body, a short circuit explosion will occur. At present, the way to discharge dew from the refrigerator motor is to open a hole at the bottom of the motor junction box to let the condensed dew flow out. This method cannot eliminate the condensation short circuit phenomenon of the insulating sleeve. The operation risk is high and equipment accidents are prone to occur.

[0003] There is a technology named "intelligent liquid nitrogen freezer" and publication number "CN203928543U" in the prior art, which discloses an intelligent liquid nitrogen freezer, including a freezing pipe and a cold source control box, the cold source control box includes a cold source control box housing, a controller and a gas-liquid mixing chamber, a temperature sensor for detecting the temperature of the gas-liquid mixing chamber is provided on the cold source control box housing, the controller controls the liquid nitrogen and nitrogen input of the gas-liquid mixing chamber according to the temperature, and the gas outlet pipe of the gas-liquid mixing chamber is connected to the cold source medium interlayer outside the inner tube. The intelligent liquid nitrogen freezer described in the utility model adopts cold source media with two different temperatures of input liquid nitrogen and nitrogen, and obtains nitrogen with a temperature lower than that of general nitrogen but higher than that of liquid nitrogen through the gas-liquid mixing chamber. Under the premise of meeting the requirements of low-temperature freezing, nitrogen with a higher pressure and more uniform distribution than liquid nitrogen is used to contact the surface of the frozen object, so that the surface temperature of each part of the frozen object is uniform, and the nitrogen has sufficient permeability, which improves the freezing effect and the quality of the finished product of the frozen object.

[0004] However, this technology does not involve the technical problems and technical solutions of the present application. Utility Model Content

[0005] The technical problem to be solved by the utility model is: in view of the deficiencies in the prior art, a protective device for a motor junction box of a refrigerator is provided which has a simple structure, avoids condensation in the junction box, avoids the risk of explosion caused by a short circuit of the insulating sleeve of the lead wire, reduces the failure rate, improves the safety of the equipment, saves the replacement cost caused by a short circuit failure of the motor junction box, and reduces the cost.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the utility model is:

[0007] The utility model discloses a protection device for a motor junction box of a refrigerator, comprising a junction box body, wherein the top of the junction box body is connected to the lower end of an air intake pipe, the bottom of the junction box body is connected to one end of an exhaust pipe, the upper end of the air intake pipe is connected to a nitrogen supply component, and the other end of the exhaust pipe is connected to a nitrogen recovery component.

[0008] An air intake pipeline control valve is arranged on the air intake pipeline, and an exhaust pipeline control valve is arranged on the exhaust pipeline.

[0009] The junction box body is connected with a pressure sensor.

[0010] The intake pipe control valve and the exhaust pipe control valve are both electronic valves.

[0011] The air intake pipe control valve, the exhaust pipe control valve and the pressure sensor are respectively connected to the control components.

[0012] The nitrogen supply component is a nitrogen supply pipeline or a nitrogen tank.

[0013] The junction box body is installed on the installation vertical beam.

[0014] The air intake duct is a structure made of metal pipe fittings.

[0015] The exhaust pipe is a structure made of metal pipe fittings.

[0016] The technical solution of the utility model is adopted, and the working principle and beneficial effects are as follows:

[0017] The utility model discloses a protective device for the junction box of a refrigerator motor. The chemical stability and dryness of nitrogen are utilized to continuously fill low-pressure nitrogen with a water content of less than 15 ppm into the junction box of the refrigerator motor from the top of the junction box in a small flow form, and an exhaust pipeline is installed at the bottom of the junction box. The nitrogen in the junction box is kept in a slightly positive pressure state. The dry nitrogen in the slightly positive pressure state maintains the dryness in the motor junction box, eliminates the generation of condensation, and avoids the short circuit of the insulation sleeve of the motor lead wire. During the protection process, nitrogen is supplied to the junction box body through the air intake pipe, and the exhaust pipeline is used for the discharge of nitrogen. In this way, nitrogen is supplied and the nitrogen in the junction box body is kept in a slightly positive pressure state. When the cold energy generated by the operation of the refrigerator is transmitted to the insulation sleeve of the motor lead wire, since the surrounding environment inside the junction box body is full of dry nitrogen, water will not condense, the condensation phenomenon is eliminated, and the insulation sleeve of the motor lead wire is avoided to be short-circuited, thus eliminating the risk of explosion caused by short circuit, thereby improving the safety of the junction box and the entire equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following is a brief description of the contents and symbols in the drawings of this specification:

[0019] Figure 1 This is a schematic diagram of the structure of the refrigerator motor junction box protection device of the utility model;

[0020] The markings in the attached drawings are: 1. Junction box body; 2. Air intake pipe; 3. Exhaust pipe; 4. Nitrogen supply component; 5. Nitrogen recovery component; 6. Air intake pipe control valve; 7. Pressure sensor. DETAILED DESCRIPTION

[0021] The following is a detailed description of the embodiments of the present invention, such as the shapes, structures, positions and connection relationships of the components involved, the functions and working principles of the components, etc., by referring to the accompanying drawings:

[0022] As attached Figure 1 As shown, the utility model is a refrigerator motor junction box protection device, including a junction box body 1, the top of the junction box body 1 is connected to the lower end of the air intake pipe 2, the bottom of the junction box body 1 is connected to one end of the exhaust pipe 3, the upper end of the air intake pipe 2 is connected to the nitrogen supply component 4, and the other end of the exhaust pipe 3 is connected to the nitrogen recovery component 5. The above structure proposes an improved technical solution to the deficiencies in the prior art. The technical improvement idea is: using the chemical stability and dryness of nitrogen, low-pressure nitrogen with a water content of less than 15ppm is continuously filled into the junction box body of the refrigerator motor from the top of the junction box body 1 in a small flow form, and an exhaust pipeline is installed at the bottom of the junction box body. Maintain a slightly positive pressure state of nitrogen in the junction box. The dry nitrogen in the slightly positive pressure state maintains the dryness of the motor junction box, eliminates the generation of condensation, and avoids short circuit of the insulation sleeve of the motor lead wire. During the protection process, nitrogen is supplied to the junction box body 1 through the air intake pipe 3, and the exhaust pipe 3 is used to discharge nitrogen. In this way, nitrogen is supplied and the nitrogen in the junction box body 1 is kept in a slightly positive pressure state. In this way, when the cold energy generated by the operation of the refrigerator is transmitted to the insulating sleeve of the motor lead wire, since the surrounding environment inside the junction box body 1 is full of dry nitrogen (water content is less than 15ppm), water will not condense, thereby eliminating condensation, avoiding short circuit of the insulating sleeve of the motor lead wire, and eliminating the risk of explosion caused by short circuit, thereby improving the safety of the junction box and the entire equipment. The refrigerator motor junction box protection device described in the utility model has a simple structure, avoids condensation in the junction box, avoids the risk of explosion caused by short circuit of the lead wire insulating sleeve, reduces the failure rate, improves the safety of the equipment, saves the replacement cost of the motor junction box caused by short circuit failure, and reduces costs.

[0023] The intake pipe control valve 6 is provided on the intake pipe 2. The exhaust pipe control valve 8 is provided on the exhaust pipe 3. In the above structure, the on-off and opening size of the intake pipe 2 are controlled by the intake pipe control valve 6. The on-off and opening size of the exhaust pipe 3 are controlled by the exhaust pipe control valve 8. Under normal circumstances, after the intake pipe 2 supplies nitrogen, when the nitrogen pressure in the junction box body is within the set range, the intake pipe control valve 6 and the exhaust pipe control valve 8 are both in a completely closed state. When the pressure in the junction box exceeds the upper pressure limit, the exhaust pipe control valve 8 opens to release a certain amount of nitrogen, and closes again after reaching the set pressure range. When the pressure in the junction box body 1 is lower than the lower pressure limit, the intake pipe control valve 6 opens to supplement a certain amount of nitrogen, and closes again after reaching the set pressure range. In this way, it is reliably ensured that the pressure range in the junction box body 1 is always within the set optimal range.

[0024] The junction box body 1 is connected to a pressure sensor 7. The intake duct control valve 6 and the exhaust duct control valve are both electronic valves. The intake duct control valve 6, the exhaust duct control valve 8, and the pressure sensor 7 are respectively connected to the control component. In the above structure, the pressure sensor monitors the pressure value in the junction box body in real time, and feeds back to the control component in real time. The control component controls the on-off and opening size of the intake duct control valve 6 and the exhaust duct control valve 8 according to the fed-back pressure value, thereby realizing pressure control in the junction box body.

[0025] The nitrogen supply component 4 is a nitrogen supply pipeline or a nitrogen tank. The junction box body 1 is installed on the mounting vertical beam. In the above structure, the junction box body is reliably connected, and when connected, the top of the junction box body 1 needs to be connected to the lower end of the air intake pipe 2, and the bottom of the junction box body 1 needs to be connected to one end of the exhaust pipe 3, so that the nitrogen supply in the junction box body can be reliably met.

[0026] The air intake pipe 2 is a structure made of metal pipes. The exhaust pipe 3 is a structure made of metal pipes. With the above structure, the air intake pipe 2 and the exhaust pipe have a long service life.

[0027] The technical improvement idea of ​​the refrigerator motor junction box protection device described in the utility model is: using the chemical stability and dryness of nitrogen, low-pressure nitrogen with a water content of less than 15ppm is continuously filled into the inside of the junction box body of the refrigerator motor from the top of the junction box body 1 in a small flow rate, and an exhaust pipeline is installed at the bottom of the junction box body. Maintain a slightly positive pressure state of nitrogen in the junction box. The dry nitrogen in a slightly positive pressure state maintains dryness in the motor junction box, eliminates the generation of condensation, and avoids short circuits in the insulating sleeves of the motor lead wires. During the protection process, nitrogen is supplied to the junction box body 1 through the air intake pipe 3, and the exhaust pipe 3 is used to discharge nitrogen. In this way, nitrogen is supplied and the nitrogen in the junction box body 1 is kept in a slightly positive pressure state. In this way, when the cold energy generated by the operation of the refrigerator is transmitted to the insulating sleeve of the motor lead wire, since the surrounding environment inside the junction box body 1 is full of dry nitrogen (water content is less than 15ppm), water will not condense, thereby eliminating condensation, avoiding short circuit of the insulating sleeve of the motor lead wire, and eliminating the risk of explosion caused by short circuit, thereby improving the safety of the junction box and the entire equipment.

[0028] The above is an exemplary description of the utility model in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A refrigerator motor junction box protection device, characterized in that: The invention comprises a junction box body (1), wherein the top of the junction box body (1) is connected to the lower end of an air intake pipe (2), the bottom of the junction box body (1) is connected to one end of an air exhaust pipe (3), the upper end of the air intake pipe (2) is connected to a nitrogen supply component (4), and the other end of the air exhaust pipe (3) is connected to a nitrogen recovery component (5).

2. The refrigerator motor junction box protection device according to claim 1, characterized in that: An air intake pipeline control valve (6) is provided on the air intake pipeline (2), and an exhaust pipeline control valve (8) is provided on the exhaust pipeline (3).

3. The refrigerator motor junction box protection device according to claim 2, characterized in that: The junction box body (1) is connected to a pressure sensor (7).

4. The refrigerator motor junction box protection device according to claim 3, characterized in that: The air intake pipe control valve (6) and the exhaust pipe control valve (8) are both electronic valves.

5. The refrigerator motor junction box protection device according to claim 4, characterized in that: The air intake pipe control valve (6), the exhaust pipe control valve (8) and the pressure sensor (7) are respectively connected to the control components.

6. The refrigerator motor junction box protection device according to claim 1, characterized in that: The nitrogen supply component (4) is a nitrogen supply pipeline or a nitrogen tank.

7. The refrigerator motor junction box protection device according to claim 1 or 2, characterized in that: The junction box body (1) is installed on a mounting vertical beam.

8. The refrigerator motor junction box protection device according to claim 1 or 2, characterized in that: The air intake pipe (2) is a structure made of metal pipe fittings.

9. The refrigerator motor junction box protection device according to claim 8, characterized in that: The exhaust pipe (3) is a structure made of metal pipe fittings.

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