A low-temperature condensation prevention structure for a terminal block in a compressor

Abstract

This utility model relates to a low-temperature condensation prevention structure for a terminal block in a compressor. The compressor has an intake side and an exhaust side on both sides. From the intake side to the exhaust side, the compressor is divided into a low-temperature zone, a medium-temperature zone, and a high-temperature zone connected sequentially. Both the motor and rotor are installed within the compressor body, with the motor located in the low-temperature zone. The key feature is that a terminal block mounting port is provided on the outer wall of the high-temperature zone of the compressor body, and a motor lead cavity is provided on the inner wall of the high-temperature zone. One end of the motor lead cavity is connected to the terminal block mounting port, and the other end is connected to the tail end of the low-temperature zone. The terminal block mounting port is not connected to the interior of the high-temperature zone of the compressor body. A junction box is fixed to the terminal block mounting port, and the motor leads are located within the motor lead cavity. Both ends of the motor leads are connected to the motor and the junction box, respectively. This utility model has a reasonable structural design, which helps improve the safety and reliability of the compressor.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, and in particular to a low-temperature condensation prevention structure for a wiring board in a compressor. Background Technology

[0002] Based on the temperature gradient during compressor operation, the compressor can be divided into three zones from the suction side to the discharge side: low temperature zone, medium temperature zone, and high temperature zone. Currently, the terminal blocks of commonly used compressors are all located in the low temperature zone or medium temperature zone.

[0003] In practical applications, if the compressor's terminal block is placed in the high-temperature zone, the pressure is higher, the requirements for the terminal block are higher, the cost is increased, and the risk of leakage is increased in long-term use, reducing safety. At the same time, refrigerant and refrigeration oil are miscible, the density of gaseous refrigerant on the high-temperature side is higher, the amount of refrigerant is greater, and the refrigerant carries more refrigeration oil. The wiring inside the terminal block will also come into contact with more oil, which may lead to short circuit risk and reduce safety.

[0004] Currently, compressors with terminal blocks located in the low-temperature or medium-temperature range are prone to frost buildup at the terminal blocks when operating under low-temperature conditions. When the operating conditions or the ambient temperature changes, the frost at the terminal blocks will melt into dew, which can easily lead to leakage or short circuits. This is detrimental to the safety of the compressor and will reduce its reliability. Utility Model Content

[0005] The purpose of this utility model is to overcome the above-mentioned deficiencies in the prior art and to provide a low-temperature condensation prevention structure for the wiring board in a compressor with a reasonable structural design that is conducive to improving the safety and reliability of the compressor.

[0006] The technical solution adopted by this utility model to solve the above problems is as follows: the compressor has a terminal block anti-low temperature condensation structure. The two sides of the compressor are the suction side and the discharge side, respectively. The compressor is divided into a low temperature zone, a medium temperature zone and a high temperature zone connected sequentially from the suction side to the discharge side. The motor and rotor are both installed in the compressor body. The motor is located in the low temperature zone. Its structural features are: a terminal block mounting port is provided on the outer wall of the high temperature zone of the compressor body, and a motor lead cavity is provided on the inner wall of the high temperature zone of the compressor body. One end of the motor lead cavity is connected to the terminal block mounting port, and the other end of the motor lead cavity is connected to the tail of the low temperature zone. The terminal block mounting port is not connected to the interior of the high temperature zone of the compressor body. The junction box is fixed on the terminal block mounting port, and the motor lead is located in the motor lead cavity. The two ends of the motor lead are connected to the motor and the junction box, respectively.

[0007] Preferably, the junction box of this utility model has a terminal block and a terminal board inside. The terminal board is fixed on the terminal board mounting port, and the terminal board and the terminal board mounting port are sealed. The terminal block passes through the terminal board and is fixed on the terminal board. One end of the terminal block is located inside the terminal board mounting port and is connected to one end of the motor lead. The other end of the terminal block is located outside the compressor body and is used to connect to an external power supply line.

[0008] Preferably, the diameter of the other end of the motor lead cavity of this invention is reduced to form a tapered design.

[0009] Preferably, the low-temperature zone described in this invention is the area from the compressor intake port to the motor tail.

[0010] Preferably, the medium-temperature zone described in this invention is the area from the tail of the motor to the tail of the rotor.

[0011] Preferably, the high-temperature zone described in this invention is the area from the tail of the rotor to the compressor exhaust port.

[0012] Compared with existing technologies, this invention has the following advantages and effects: The junction box is located in the high-temperature zone on the exhaust side, where the temperature is high, effectively preventing condensation and thus avoiding leakage and short circuits caused by condensation, improving the safety and reliability of the compressor. The junction box is fixed to the mounting port of the wiring board and is not connected to the interior of the high-temperature zone of the compressor body. The junction box is connected to the tail end of the low-temperature zone through the motor lead cavity, resulting in lower pressure on the wiring board and higher safety. A tapered design is incorporated at the end of the motor lead cavity near the motor, making the wiring space within the motor lead cavity relatively narrow and long, effectively reducing the amount of refrigerant oil reaching the wiring board. Simultaneously, the lowest point of the motor lead cavity near the motor allows any accumulated oil to drain out, effectively preventing oil buildup. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model and / or the prior art, the drawings used in the description of the embodiments and / 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.

[0014] Figure 1 This is a schematic diagram of the main structure of the compressor according to an embodiment of the present invention.

[0015] Figure 2 yes Figure 1 A schematic diagram of the cross-sectional structure at point AA.

[0016] Figure 3 yes Figure 1A schematic diagram of the structure viewed from below.

[0017] Figure 4 This is a structural schematic diagram of the compressor from another perspective of an embodiment of the present invention.

[0018] In the diagram: 1-Intake side; 2-Low temperature zone; 3-Medium temperature zone; 4-High temperature zone; 5-Exhaust side; 6-Gunnel box; 7-Motor; 8-Rotor; 9-Motor lead; 10-Motor lead cavity; 11-Terminal; 12-Terminal board. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and through embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0020] Example

[0021] See Figures 1 to 4 In this embodiment, the compressor has a low-temperature condensation prevention structure on the wiring board. The compressor has a suction side 1 and a discharge side 5 on its two sides. The suction side 1 is the side of the compressor closest to the suction port, and the discharge side 5 is the side of the compressor closest to the discharge port. The compressor is divided into a low-temperature zone 2, a medium-temperature zone 3, and a high-temperature zone 4 connected in sequence from the suction side 1 to the discharge side 5. The motor 7 and the rotor 8 are both installed in the compressor body. The motor 7 is located in the low-temperature zone 2. The motor 7 is the power unit of the compressor and is responsible for converting external electrical energy into power to make the rotor 8 rotate. The rotor 8 is a pair of screw-shaped rotors that rotate and mesh in the compressor body to compress the working fluid.

[0022] In this embodiment, a terminal block mounting port 13 is provided on the outer wall of the high-temperature zone 4 of the compressor body, and a motor lead cavity 10 is provided on the inner wall of the high-temperature zone 4 of the compressor body. One end of the motor lead cavity 10 is connected to the terminal block mounting port 13, and the other end of the motor lead cavity 10 is connected to the tail end of the low-temperature zone 2. The port diameter of the other end of the motor lead cavity 10 is reduced to form a constricted design. The motor lead cavity 10 is a cavity provided on the compressor body, which spans from the tail end of the low-temperature zone 2 to the high-temperature zone 4. However, the motor lead cavity 10 is connected to the tail end of the low-temperature zone 2, but not to the interior of the high-temperature zone 4, serving as space for arranging the motor leads 9. Furthermore, a constricted design is made at the inlet of the motor leads 9 to prevent the medium-temperature working fluid from exchanging heat with the high-temperature zone through the motor lead cavity 10 and causing adverse effects.

[0023] Junction box 6 is fixed on junction box mounting port 13. Junction box mounting port 13 is not connected to the interior of high temperature zone 4 of compressor body. The air pressure in junction box mounting port 13 is equal to the pressure at the tail of low temperature zone 2. The pressure at junction box mounting port 13 is much lower than the pressure in high temperature zone 4, which improves the safety of junction box 6.

[0024] In this embodiment, the motor lead 9 is located inside the motor lead cavity 10, and its two ends are connected to the motor 7 and the junction box 6, respectively. The motor lead 9 is a wire that is led out from the motor 7 and then connected to the junction box 6. The motor lead 9 is arranged inside the motor lead cavity 10.

[0025] In this embodiment, the junction box 6 is used for connecting the motor 7 to an external power source via the motor lead 9. The junction box 6 contains a terminal block 11 and a terminal board 12. The terminal board 12 is fixed on the terminal board mounting port 13, and the terminal board 12 and the terminal board mounting port 13 are sealed together. The terminal block 11 passes through the terminal board 12 and is fixed on the terminal board 12. One end of the terminal block 11 is located inside the terminal board mounting port 13 and is connected to one end of the motor lead 9. The other end of the terminal block 11 is located outside the compressor body and is used to connect to an external power supply.

[0026] In this embodiment, the low-temperature zone 2 is the area from the compressor intake port to the tail of the motor 7. The temperature of the working fluid in this area is close to the intake temperature, so the temperature in this area is low. The medium-temperature zone 3 is the area from the tail of the motor 7 to the tail of the rotor 8. The working fluid is gradually compressed by the rotor 8 in this area, and the temperature rises, so the temperature in this area also rises. The high-temperature zone 4 is the area from the tail of the rotor 8 to the compressor exhaust port. The working fluid has been fully compressed by the rotor 8 in this area, and the temperature rises to its highest point, so the temperature in this area also rises to its highest point.

[0027] When the compressor is running, the internal temperature gradually increases from the suction side 1 to the discharge side 5, and is divided into three areas: low temperature zone 2, medium temperature zone 3, and high temperature zone 4. The junction box 6 is located in the high temperature zone 4. When the compressor is running, the high temperature zone 4 always maintains a high temperature, which can prevent condensation at the junction box 6, thereby avoiding leakage and short circuit at the junction box 6 and improving the safety and reliability of the compressor.

[0028] Furthermore, it should be noted that the specific embodiments described in this specification may differ in the shape and name of their components. The above description is merely illustrative of the structure of this utility model. All equivalent or simple variations made based on the structure, features, and principles described in this utility model patent concept are included within the protection scope of this utility model patent. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not deviate from the structure of this utility model or exceed the scope defined in these claims, all of which should fall within the protection scope of this utility model.

Claims

1. A low-temperature condensation prevention structure for a wiring board in a compressor, wherein the compressor has an intake side (1) and an exhaust side (5) on both sides, and the compressor is divided into a low-temperature zone (2), a medium-temperature zone (3), and a high-temperature zone (4) connected sequentially from the intake side (1) to the exhaust side (5), wherein a motor (7) and a rotor (8) are both installed in the compressor body, and the motor (7) is located in the low-temperature zone (2), characterized in that: A terminal block mounting port (13) is provided on the outer wall of the high-temperature zone (4) of the compressor body, and a motor lead cavity (10) is provided on the inner wall of the high-temperature zone (4) of the compressor body. One end of the motor lead cavity (10) is connected to the terminal block mounting port (13), and the other end of the motor lead cavity (10) is connected to the tail of the low-temperature zone (2). The terminal block mounting port (13) is not connected to the interior of the high-temperature zone (4) of the compressor body. The junction box (6) is fixed on the terminal block mounting port (13), and the motor lead (9) is located in the motor lead cavity (10). The two ends of the motor lead (9) are connected to the motor (7) and the junction box (6) respectively.

2. The anti-low-temperature condensation structure for the wiring board in a compressor according to claim 1, characterized in that: The junction box (6) contains a terminal block (11) and a terminal block (12). The terminal block (12) is fixed on the terminal block mounting port (13). The terminal block (12) and the terminal block mounting port (13) are sealed together. The terminal block (11) passes through the terminal block (12) and is fixed on the terminal block (12). One end of the terminal block (11) is located inside the terminal block mounting port (13) and is connected to one end of the motor lead (9). The other end of the terminal block (11) is located outside the compressor body and is used to connect to the external power supply line.

3. The anti-low-temperature condensation structure for the wiring board in a compressor according to claim 1, characterized in that: The port diameter at the other end of the motor lead cavity (10) is reduced to form a tapered design.

4. The anti-low-temperature condensation structure for the wiring board in a compressor according to claim 1, characterized in that: The low-temperature zone (2) is the area from the compressor intake port to the tail of the motor (7).

5. The anti-low-temperature condensation structure for the wiring board in a compressor according to claim 1, characterized in that: The medium temperature zone (3) is the area from the tail of the motor (7) to the tail of the rotor (8).

6. The anti-low-temperature condensation structure for the terminal block in a compressor according to claim 1, characterized in that: The high-temperature zone (4) is the area from the tail of the rotor (8) to the compressor exhaust port.

Images