A variable frequency rotary compressor

Abstract

This utility model discloses a variable frequency rotor compressor, including a variable frequency compressor housing. A variable frequency rotor body is disposed on the inner surface of the housing, and an impeller is disposed at the upper end of the rotor body. An air intake is disposed on the outer surface of the housing, and an air outlet is disposed on the upper surface of the housing. A threaded adapter is threadedly connected to the outer surface of the air outlet. A convex tube head is clamped and fixed between the air outlet and the threaded adapter. A spring is sleeved on the outer surface of the lower end of the convex tube head, and a conical block is fixedly connected to the lower surface of the spring. An inner ring protrusion is disposed on the inner surface of the air outlet. By using a mechanism that clamps and fixes the convex tube head, spring, and conical block at the air outlet, the three-dimensional conical block structure provides a good seal and is not easily deformed. The valve body structure can be disassembled by removing the threaded adapter, making it easy to install, disassemble, and replace.

Description

Technical Field

[0001] This utility model relates to the field of variable frequency rotary compressors, and more specifically, to a variable frequency rotary compressor. Background Technology

[0002] A variable frequency compressor, as opposed to a compressor with a constant speed, continuously adjusts its speed within a certain range through a control method or means, thus continuously changing its output energy. The compressor's speed changes with the power supply frequency. Unlike a fixed-speed compressor, the motor coil resistance is constant. A variable frequency compressor can be divided into two parts: a variable frequency controller (also known as a frequency converter) and the compressor itself. The principle of the variable frequency controller is to convert the alternating current from the power grid into square wave pulses. By adjusting the frequency of the square wave pulses (i.e., adjusting the duty cycle), the speed of the motor driving the compressor can be controlled. The higher the frequency, the higher the speed. Another advantage of the variable frequency controller is that the starting current of the drive motor is small, minimizing the impact on the power grid.

[0003] In existing technologies, variable frequency rotary compressors require a check valve assembly when discharging gas at the top. The check valve in existing variable frequency rotary compressors generally adopts a flexible sealing valve structure, which has a simple valve mechanism. When the compressor is in use, it generates high temperature heat, and when the refrigerant is cold when discharging gas, the check valve plate is prone to deformation, affecting its use. Moreover, the check valve of the compressor is mostly a one-piece finished structure, which is easy to be damaged and inconvenient to install, disassemble and replace. Utility Model Content

[0004] To address the problems existing in the prior art, the purpose of this utility model is to provide a variable frequency rotor compressor. By adopting a mechanism that clamps and fixes a convex tube head and a spring and a conical plug at the outlet, the three-dimensional conical plug structure provides a good seal and is not easily deformed. The valve body structure can be disassembled by removing the threaded adapter, making it easy to install, disassemble, and replace.

[0005] To solve the above problems, the present invention adopts the following technical solution.

[0006] A variable frequency rotor compressor includes a variable frequency compressor housing. A variable frequency rotor body is disposed on the inner surface of the housing. An impeller is disposed at the upper end of the rotor body. An air intake is disposed on the outer surface of the housing. An air outlet is disposed on the upper surface of the housing. A threaded adapter is threadedly connected to the outer surface of the air outlet. A convex tube head is clamped and fixed between the air outlet and the threaded adapter. A spring is sleeved on the outer surface of the lower end of the convex tube head. A conical block is fixedly connected to the lower surface of the spring. An inner ring protrusion is disposed on the inner surface of the air outlet. The outer surface of the conical block is slidably engaged with the inner surface of the inner ring protrusion. By using a mechanism that clamps and fixes the convex tube head, spring, and conical block at the air outlet, the three-dimensional conical block structure provides a good seal, making it resistant to deformation. The valve body structure can be disassembled by removing the threaded adapter, making it easy to install, disassemble, and replace.

[0007] Furthermore, an inner ring groove is provided at the upper end of the air outlet, and an inner ring groove is provided on the lower end surface of the threaded adapter. The convex tube head is clamped and fixed at the inner surface of the air outlet and the inner ring groove of the threaded adapter.

[0008] Furthermore, the inner surface of the inner ring protrusion is provided with a tapered hole, and the outer surface of the tapered block is tightly fitted to the inner surface of the tapered hole.

[0009] Furthermore, the conical block extends downwards with an inner ring protrusion, and the outer surface of the conical block is covered with a rubber layer.

[0010] Furthermore, the upper outer surface of the threaded adapter is provided with an external thread, and the outer surface of the threaded adapter is provided with a hexagonal protrusion.

[0011] Furthermore, a support foot is fixed to the lower surface of the variable frequency compressor housing. Three sets of support feet are distributed on the outer surface of the variable frequency compressor housing, and mounting holes are provided on the surface of the support feet.

[0012] Furthermore, the variable frequency compressor housing is made of stainless steel, and the outer surface of the variable frequency compressor housing is coated with a heat dissipation coating layer.

[0013] Compared with existing technologies, the advantages of this utility model are:

[0014] (1) By using a clamping and fixing mechanism of convex pipe head and spring at the air outlet, the three-dimensional conical block structure is well sealed and not easily deformed. The valve body structure can be disassembled by disassembling the threaded adapter, making it easy to install, disassemble, and replace. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a first cross-sectional view of the overall structure of this utility model;

[0017] Figure 3 This is a second cross-sectional view of the overall structure of this utility model;

[0018] Figure 4 This is an enlarged schematic diagram of point A in this utility model;

[0019] Figure 5 This is an enlarged schematic diagram of section B of this utility model.

[0020] Explanation of the labels in the diagram:

[0021] 1. Variable frequency compressor housing; 2. Variable frequency rotor body; 3. Impeller; 4. Inlet; 5. Outlet; 6. Threaded adapter; 7. Convex tube head; 8. Spring; 9. Conical plug; 10. Inner ring protrusion; 11. Hexagonal protrusion platform; 12. Support foot. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1

[0024] Please see Figure 1-5 A variable frequency rotor compressor includes a variable frequency compressor housing 1, a variable frequency rotor body 2 disposed on the inner surface of the variable frequency compressor housing 1, an impeller 3 disposed at the upper end of the variable frequency rotor body 2, an air intake 4 disposed on the outer surface of the variable frequency compressor housing 1, an air outlet 5 disposed on the upper end surface of the variable frequency compressor housing 1, a threaded adapter 6 connected to the outer surface of the air outlet 5 by a thread, a convex tube head 7 clamped and fixed between the air outlet 5 and the threaded adapter 6, a spring 8 sleeved on the outer surface of the lower end of the convex tube head 7, a conical block 9 fixedly connected to the lower surface of the spring 8, an inner ring protrusion 10 disposed on the inner surface of the air outlet 5, and the outer surface of the conical block 9 slidably engaging with the inner surface of the inner ring protrusion 10; by adopting a mechanism for clamping and fixing the convex tube head, spring, and conical block at the air outlet, the three-dimensional conical block structure provides good sealing and is not easily deformed; the valve body structure can be disassembled by removing the threaded adapter, making it convenient to install, disassemble, and replace;

[0025] An inner ring groove is provided at the upper end of the air outlet 5, and an inner ring groove is provided on the lower end surface of the threaded adapter 6. The inner surfaces of the air outlet 5 and the inner ring groove of the threaded adapter 6 clamp and fix the convex tube head 7. During installation, the convex tube head 7 is inserted into the inner ring groove of the air outlet 5, and the threaded adapter 6 is installed outside the air outlet 5. After installation, the inner ring groove of the threaded adapter 6 can be clamped on the upper end of the convex tube head 7, which can be clamped and fixed firmly, and the installation is convenient and stable.

[0026] The inner surface of the inner ring protrusion 10 is provided with a conical hole, and the outer surface of the conical plug 9 is tightly fitted to the inner surface of the conical hole; the conical plug 9 can be inserted into the conical hole for installation, and it can fit and seal the inner ring protrusion 10. The conical plug 9 adopts a three-dimensional conical structure, which is not easily deformed. The conical plug 9 extends downward from the inner ring protrusion 10, and the outer surface of the conical plug 9 is covered with a rubber layer; thus improving the sealing performance.

[0027] The upper outer surface of the threaded adapter 6 is provided with an external thread, and the outer surface of the threaded adapter 6 is provided with a hexagonal protrusion 11. When in use, the hexagonal protrusion 11 is provided on the outside of the threaded adapter 6. During operation, a wrench can be inserted along the hexagonal protrusion 11 to twist and install the threaded adapter 6 and to twist and disassemble the threaded adapter 6, which is convenient for installation and disassembly.

[0028] The lower surface of the variable frequency compressor housing 1 is fixed with support feet 12. Three sets of support feet 12 are distributed on the outer surface of the variable frequency compressor housing 1, and mounting holes are provided on the surface of the support feet 12. The variable frequency compressor housing 1 is easy to install. The variable frequency compressor housing 1 is made of stainless steel and will not rust. The outer surface of the variable frequency compressor housing 1 is coated with a heat dissipation coating layer (a heat dissipation coating is a special functional coating that improves the heat dissipation efficiency of the surface of an object. After heat is generated inside, it can be conducted to the variable frequency compressor housing 1. The heat can be quickly dissipated through the heat dissipation coating to improve heat dissipation performance).

[0029] When in use, the upper end of the variable frequency rotor body 2 is provided with an impeller 3, the outer surface of the variable frequency compressor housing 1 is provided with an air intake 4, and the upper surface of the variable frequency compressor housing 1 is provided with an air outlet 5. When in use, the variable frequency rotor body 2 rotates, which drives the impeller 3 to rotate, and air is drawn in through the air intake 4 and discharged through the air outlet 5.

[0030] The outer surface of the air outlet 5 is connected to a threaded adapter 6 via a thread. A convex tube head 7 is clamped and fixed between the air outlet 5 and the threaded adapter 6. A spring 8 is sleeved on the outer surface of the lower end of the convex tube head 7. A conical plug 9 is fixedly connected to the lower surface of the spring 8. An inner ring protrusion 10 is provided on the inner surface of the air outlet 5. The outer surface of the conical plug 9 is slidably engaged with the inner surface of the inner ring protrusion 10. A conical hole is provided on the inner surface of the inner ring protrusion 10. The outer surface of the conical plug 9 is tightly fitted to the inner surface of the conical hole. It can be installed by snapping into the conical hole, which can fit and seal the inner ring protrusion 10. The conical block 9 adopts a three-dimensional conical structure, which is not easily deformed. The conical block 9 extends downward from the inner ring protrusion 10, and the outer surface of the conical block 9 is covered with a rubber layer to improve the sealing performance. When the gas is discharged, the gas can push the conical block 9 and rise through the conical block 9 to create a gap with the conical hole of the inner ring protrusion 10. The gas rises and is discharged along the gap. When the variable frequency rotor body 2 stops, it can be lowered by the spring 8, which can pop down the conical block 9 to seal it. The sealing performance is high.

[0031] During installation, the convex tube head 7 is inserted into the inner ring groove of the air outlet 5, and the threaded adapter 6 is installed outside the air outlet 5. After installation, the inner ring groove of the threaded adapter 6 can be clamped on the upper end of the convex tube head 7, which can be clamped and fixed firmly, making installation convenient and stable. The upper outer surface of the threaded adapter 6 is provided with external threads, and an external pipe can be installed on the threaded adapter 6 for easy installation. The outer surface of the threaded adapter 6 is provided with a hexagonal protrusion 11. During use, the hexagonal protrusion 11 on the threaded adapter 6 can be used to twist and install the threaded adapter 6, and to twist and disassemble the threaded adapter 6, so as to remove the built-in convex tube head 7, spring 8 and conical plug 9, which is convenient for assembly and disassembly.

Claims

1. A variable frequency rotary compressor, comprising a variable frequency compressor housing (1), characterized in that: The variable frequency compressor housing (1) has a variable frequency rotor body (2) on its inner surface. The variable frequency rotor body (2) has an impeller (3) on its upper end. The variable frequency compressor housing (1) has an air intake (4) on its outer surface. The variable frequency compressor housing (1) has an air outlet (5) on its upper surface. The outer surface of the air outlet (5) is connected to a threaded adapter (6) by a thread. A convex tube head (7) is clamped and fixed between the air outlet (5) and the threaded adapter (6). A spring (8) is sleeved on the outer surface of the lower end of the convex tube head (7). A conical block (9) is fixedly connected to the lower surface of the spring (8). An inner ring protrusion (10) is provided on the inner surface of the air outlet (5). The outer surface of the conical block (9) is slidably engaged with the inner surface of the inner ring protrusion (10).

2. The variable frequency rotary compressor according to claim 1, characterized in that: The upper end of the air outlet (5) is provided with an inner ring groove, and the lower end surface of the threaded adapter (6) is provided with an inner ring groove. The inner surface of the air outlet (5) and the inner ring groove of the threaded adapter (6) clamps and fixes the convex tube head (7).

3. A variable frequency rotary compressor according to claim 1, characterized in that: The inner surface of the inner ring protrusion (10) is provided with a tapered hole, and the outer surface of the tapered block (9) is tightly attached to the inner surface of the tapered hole.

4. A variable frequency rotary compressor according to claim 1, characterized in that: The conical block (9) extends downward to form an inner ring protrusion (10), and the outer surface of the conical block (9) is covered with a rubber layer.

5. A variable frequency rotary compressor according to claim 1, characterized in that: The upper outer surface of the threaded adapter (6) is provided with an external thread, and the outer surface of the threaded adapter (6) is provided with a hexagonal protrusion (11).

6. A variable frequency rotary compressor according to claim 1, characterized in that: The lower end surface of the variable frequency compressor housing (1) is fixed with a support foot (12). Three sets of support feet (12) are distributed on the outer surface of the variable frequency compressor housing (1), and mounting holes are provided on the surface of the support foot (12).

7. A variable frequency rotary compressor according to claim 1, characterized in that: The variable frequency compressor housing (1) is made of stainless steel, and the outer surface of the variable frequency compressor housing (1) is coated with a heat dissipation coating layer.

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