CN219974808U - Capacity adjustment device and variable capacity scroll compressor - Google Patents

Abstract

The utility model discloses a capacity adjusting device and a variable capacity scroll compressor, wherein the capacity adjusting device comprises: the device comprises a fixed scroll, a capacity regulating valve and a control assembly; at least one gas unloading exhaust port and at least one gas discharging exhaust port are arranged on the connecting end face of the fixed scroll, wherein: the gas unloading exhaust port is communicated with an unloading hole in the vortex inner ring area of the fixed vortex disc through an internal channel of the fixed vortex disc, and the gas discharging exhaust port is communicated with a total discharging outlet of the fixed vortex disc through another internal channel of the fixed vortex disc; the capacity control valve is installed in the terminal surface of fixing vortex dish, includes: the capacity adjusting valve seat and the capacity adjusting valve plate form an adjusting cavity between the capacity adjusting valve seat and the connecting end face of the fixed scroll, and the capacity adjusting valve plate is arranged in the adjusting cavity and can be moved and switched between a sealing position and a releasing position. The utility model has simple structure, low cost and convenient assembly, and can change the discharge capacity of the vortex compressor without changing the rotating speed.

Description

Capacity adjustment device and variable capacity scroll compressor

Technical field

The utility model belongs to the technical field of scroll compressors, and specifically relates to a capacity adjustment device and a variable-capacity scroll compressor.

Background technique

The capacity adjustment technology of scroll compressors is generally used in scroll compressors with a fixed speed, which allows the compressor to change its displacement without changing the speed, that is, to change its cooling or heating output capacity, thereby better It can adapt to changes in environmental load, reduce the frequency of startup and shutdown of the unit, and achieve the purpose of improving the energy efficiency of the unit. In air conditioning applications, capacity adjustment technology can more accurately control room temperature and improve comfort. Capacity adjustment technology makes up for the shortcomings of fixed displacement of traditional fixed-speed compressors and achieves the effect of grading output capabilities. At the same time, it is less expensive than variable-frequency scroll compressors and can replace variable-frequency solutions when the cost budget is limited.

Existing compressors with capacity adjustment functions generally have defects such as complex structures and high costs. Some capacity adjustment mechanisms contain many sealing rings and copper pipes, which greatly reduces the reliability of the compressor.

Utility model content

In order to solve the above technical problems, the present utility model proposes a capacity adjustment device and a variable capacity scroll compressor.

In order to achieve the above objects, the technical solutions of the present invention are as follows:

On the one hand, the utility model discloses a capacity adjustment device, which includes:

The fixed scroll is provided with at least one gas unloading exhaust port and at least one gas leakage exhaust port on the connecting end surface of the fixed scroll, wherein: the gas unloading exhaust port passes through the internal channel of the fixed scroll and is connected to the vortex At least one unloading hole in the inner ring area is connected, and the unloading hole is connected with the compression chamber of the scroll compressor. The gas discharge exhaust port is connected with at least one general discharge port of the fixed scroll through another internal channel of the fixed scroll, and the gas is discharged. The exhaust port is connected to the low-pressure chamber of the scroll compressor;

The capacity adjustment valve is installed on the connection end face of the fixed scroll, and includes: a capacity adjustment valve seat and a capacity adjustment valve plate. An adjustment chamber is formed between the capacity adjustment valve seat and the connection end face of the fixed scroll, and the capacity adjustment valve The valve plate is placed in the adjustment chamber and can move and switch between the sealing position and the release position;

When the capacity regulating valve plate is in the sealing position, it can completely cover all gas unloading and exhaust ports and all gas leakage and exhaust ports on the connection end face;

When the capacity adjustment valve plate is in the release position, it does not cover the gas unloading exhaust port and the gas leakage exhaust port, and the gas unloading exhaust port is connected with the gas leakage exhaust port;

The control component is connected to the capacity adjustment valve seat and is used to control the movement and switching of the capacity adjustment valve plate between the sealing position and the release position.

The utility model discloses a capacity adjustment device. The gas unloading exhaust port and the gas leakage exhaust port are arranged on the same connection end surface of the fixed scroll plate, and a capacity adjustment valve is used to adjust the gas unloading exhaust port and the gas leakage exhaust port. The conduction status of the air port is controlled.

When the capacity regulating valve plate is in the sealing position, it can completely cover all gas unloading exhaust ports and all gas leakage exhaust ports on the connection end surface, preventing the gas in the vortex inner ring area from being discharged from the total exhaust port.

When the capacity adjustment valve is in the release position, it does not cover the gas unloading exhaust port and the gas leakage exhaust port. The gas unloading exhaust port is connected with the gas leakage exhaust port, and the gas in the vortex inner ring area is discharged from Discharge from the total discharge port.

The capacity adjusting device of the utility model has a simple structure, low cost and is easy to assemble.

On the basis of the above technical solutions, the following improvements can be made:

As a preferred solution, the connection end surface of the fixed scroll is on the side area of the fixed scroll, and the capacity regulating valve is installed on the side of the fixed scroll.

Using the above preferred solution, on the one hand, the installation of the capacity regulating valve is more convenient, on the other hand, the capacity regulating valve can quickly switch between the sealing position and the release position without adding additional elastic return parts or seals, which greatly improves the performance of the capacity regulating valve. Longevity and reliability.

As a preferred solution, a guide hole is also provided on the connecting end surface of the fixed scroll, and a guide part is provided on the capacity adjustment valve plate. The guide part can shuttle in the guide hole. The guide part and the guide hole are used to adjust the capacity adjustment valve plate. guide the direction of movement.

Using the above-mentioned preferred solution, the capacity adjustment valve plate can be switched between the sealing position and the release position more stably, and the capacity adjustment valve plate will not shift.

As a preferred solution, all gas unloading exhaust ports on the connecting end face can be connected to each other;

and / or;

All gas discharge vents on the connecting end face can be connected to each other.

The above preferred solution is adopted to increase the area of the gas discharge flow channel.

As a preferred solution, the fixed scroll includes: a lower half of the fixed scroll with a scroll profile and an upper half of the fixed scroll with a connecting end face; the lower half of the fixed scroll is fixedly connected to the upper half of the fixed scroll ;

A number of unloading holes are provided in the scroll inner ring area of the scroll profile, and an unloading channel is provided in the lower half of the fixed scroll to connect the unloading holes and the gas unloading exhaust port.

Using the above preferred solution, the fixed scroll is divided into an upper half of the fixed scroll and a lower half of the fixed scroll, and the structure of the fixed scroll is reasonable.

As a preferred solution, the connecting end of the connecting pipe has a spherical shape, and is provided with a notch for placing the sealing member close to the connecting end.

Using the above-mentioned preferred solution, the connecting pipe has an ingenious structure. The spherical connecting end extends into the connecting port and can freely float axially without generating additional stress. The sealing element is further used for sealing, so that no air leakage occurs.

As a preferred solution, the capacity adjustment valve seat is provided with a first connection port and a second connection port. The first connection port is connected to the high-pressure pressure port or the high-pressure chamber area of the fixed scroll, and the second connection port is connected to the adjustment chamber. connected;

Among them: the high-pressure pressure tapping port is also provided on the connecting end surface of the fixed scroll, and is connected to the high-pressure chamber area through its internal channel to induce high pressure.

Using the above preferred solution, the capacity adjustment valve seat has a simple structure and is easy to install.

As a preferred solution, the control component includes: a solenoid valve seat and a solenoid valve body connected to the solenoid valve seat. The solenoid valve seat is provided with a third connection port, a fourth connection port and a low-pressure pressure port. The connecting port and the fourth connecting port are respectively connected to the first connecting port and the second connecting port of the capacity regulating valve seat through connecting pipes;

The solenoid valve body is used to control the second connection port to switch between communicating with the low-pressure pressure port and communicating with the first connection port.

Using the above preferred solution, the control component has a simple structure and can realize rapid control of the capacity regulating valve.

As a preferred solution, the solenoid valve seat is also provided with mutually independent interface A, interface B, and interface C. The solenoid valve body is provided with interface a, interface one-to-one corresponding to interface A, interface B, and interface C. b. Interface c;

Interface A is connected to the low-pressure pressure port, interface B is connected to the third connection port, and interface C is connected to the fourth connection port;

When the solenoid valve body is energized, interface c is connected to interface b, and interface c is not connected to interface a;

When the solenoid valve body is in a power-off state, interface c is connected to interface a, and interface c is not connected to interface b.

Using the above preferred solution, the solenoid valve seat and the solenoid valve body have simple structures.

In addition, on the other hand, the utility model also discloses a variable-capacity scroll compressor, including: any one of the above-mentioned capacity adjustment devices.

The scroll compressor disclosed in the utility model can change its displacement without changing the rotation speed, that is, change its cooling or heating output capacity, thereby better adapting to changes in environmental loads and reducing the frequency of startup and shutdown of the unit. To achieve the purpose of improving the energy efficiency of the unit.

Description of the drawings

In order to explain the technical solutions of the embodiments of the present utility model more clearly, the drawings required in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the utility model. Therefore, it should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without exerting creative efforts.

Figure 1 is an exploded view of a fixed scroll provided by an embodiment of the present invention.

Figure 2 is a schematic structural diagram of the upper half (lower end face side) of the fixed scroll provided by the embodiment of the present invention.

Figure 3 is a schematic structural diagram of the upper half (upper end surface side) of the fixed scroll provided by the embodiment of the present invention.

Figure 4 is a schematic structural diagram of a capacity regulating valve seat provided by an embodiment of the present invention.

Figure 5 is a schematic structural diagram of the capacity regulating valve plate in the sealing position according to the embodiment of the present invention.

Figure 6 is a schematic structural diagram of the capacity regulating valve plate in the release position according to the embodiment of the present invention.

Figure 7 is a schematic structural diagram of the capacity regulating valve plate provided by the embodiment of the present invention when it is a cylindrical valve plate.

Figure 8 is a schematic structural diagram of a connection end surface provided with a communication groove according to an embodiment of the present invention.

Figure 9 is a schematic structural diagram of a fixed scroll (having two Y-shaped gas discharge grooves) provided by an embodiment of the present invention.

Figure 10 is a schematic structural diagram of a connecting pipe provided by an embodiment of the present invention.

Figure 11 is a schematic structural diagram of the solenoid valve seat provided by the embodiment of the present invention.

Figure 12 is a schematic structural diagram of the solenoid valve body provided by the embodiment of the present invention.

Figure 13 is a schematic structural diagram of a scroll compressor provided by an embodiment of the present invention.

Figure 14 is a cross-sectional view of a scroll compressor provided by an embodiment of the present invention.

Figure 15 is a schematic structural diagram of the connection end surface provided with grooves according to the embodiment of the present invention.

Among them: 1-fixed scroll, 10-connecting end face, 101-gas unloading exhaust port, 102-gas leakage exhaust port, 103-guide hole, 104-communication groove, 105-high pressure pressure port, 106- Pin hole, 107-bolt hole, 11-total discharge port, 12-groove, 131-lower half of fixed scroll, 132-upper half of fixed scroll, 14-unloading hole, 15-gas discharge groove, 16- Back pressure hole, 17-circular boss, 18-vortex exhaust port, 19-advance exhaust port, 110-back pressure connection channel, 111-back pressure chamber groove, 112-O-ring groove, 2-capacity Regulating valve, 21-capacity regulating valve seat, 211-first connection port, 212-second connection port, 22-capacity regulating valve plate, 221-guide part, 222-disc-shaped valve plate, 223-cylindrical valve plate , 23-Adjusting chamber, 3-Control component, 31-Solenoid valve seat, 311-Flange end face, 312-Low pressure pressure port, 313-Third connection port, 314-Fourth connection port, 32-Solenoid valve Valve body, 4-connecting pipe, 41-connecting end, 42-notch, 5-copper tube, 61-casing, 62-stator assembly, 63-rotor assembly, 64-moving scroll, 65-main bearing assembly , 66-Bottom bearing assembly, 67-Silent cover assembly, 68-Bottom cover assembly, 69-Top cover assembly, 610-Cross slip ring, 611-Floating sealing disc, 612-O-ring, 71-One-way valve plate, 72-Valve plate.

Detailed ways

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all implementations. example. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present utility model.

The use of the ordinal words "first", "second", "third", etc. to describe ordinary objects merely means that different instances of similar objects are involved, and is not intended to imply that the objects so described must have temporal, spatial, or A given order in terms of sorting or in any other way.

In addition, the expression "comprising" an element is an "open" expression. This "open" expression only refers to the presence of corresponding components or steps and should not be interpreted to exclude additional components or steps.

In order to achieve the purpose of the present utility model, in some embodiments of the capacity adjustment device and the variable capacity scroll compressor, as shown in Figures 1-6 and 14, the capacity adjustment device includes: a fixed scroll 1, a capacity adjustment valve 2 and control components 3.

Two gas unloading exhaust ports 101 and two gas leakage exhaust ports 102 are provided on the connecting end face 10 of the fixed scroll 1 . The gas unloading exhaust ports 101 pass through the internal passage of the fixed scroll 1 and are connected to the fixed scroll 1 . The eight unloading holes 14 in the scroll inner ring area are connected, and the gas discharge exhaust port 102 is connected through another internal channel of the fixed scroll 1 and its one general discharge port 11. The connection end surface 10 of the fixed scroll 1 is flat.

The above-mentioned unloading hole 14 is connected with the compression chamber of the scroll compressor, and the general discharge port 11 is connected with the low-pressure chamber of the scroll compressor.

The capacity adjustment valve 2 is installed on the connection end face 10 of the fixed scroll 1 and includes: a capacity adjustment valve seat 21 and a capacity adjustment valve plate 22. An adjustment cavity is formed between the capacity adjustment valve seat 21 and the connection end face 10 of the fixed scroll 1. Chamber 23, the capacity adjustment valve plate 22 is placed in the adjustment chamber 23, and can move and switch between the sealing position and the release position;

When the capacity adjustment valve plate 22 is in the sealing position, it can completely cover all the gas unloading exhaust ports 101 and all the gas leakage exhaust ports 102 on the connection end face 10;

When the capacity adjustment valve plate 22 is in the release position, it does not cover the gas unloading exhaust port 101 and the gas leakage exhaust port 102, and the gas unloading exhaust port 101 is connected with the gas leakage exhaust port 102.

The control component 3 is connected to the capacity regulating valve seat 21 through the connecting pipe 4 to control the movement and switching of the capacity regulating valve plate 22 between the sealing position and the release position.

The utility model discloses a capacity adjustment device. The gas unloading exhaust port 101 and the gas leakage exhaust port 102 are arranged on the same connection end face 10 of the fixed scroll 1, and the capacity adjustment valve 2 is used to unload the gas exhaust port. 101 and the gas leakage exhaust port 102 to control the conduction state.

When the capacity adjustment valve plate 22 is in the sealing position, it can completely cover all the gas unloading exhaust ports 101 and all the gas leakage exhaust ports 102 on the connection end face 10, preventing the gas in the vortex inner ring area from flowing out of the total. The discharge port 11 discharges.

When the capacity adjustment valve plate 22 is in the release position, it does not cover the gas unloading exhaust port 101 and the gas leakage exhaust port 102. The gas unloading exhaust port 101 is connected with the gas leakage exhaust port 102, and the vortex inner ring The gas in the area is discharged from the general discharge port 11.

The above-mentioned capacity regulating valve plate 22 is a metal valve plate without non-metallic seals such as O-rings, which greatly improves the life and reliability of the capacity regulating valve 2 .

The capacity adjusting device of the utility model has a simple structure, low cost and is easy to assemble.

It is worth noting that the fixed scroll 1 in the above embodiment has one connecting end surface 10 and one capacity regulating valve 2. However, the number of connecting end surfaces 10 is not limited to one, and can also be two, three, etc. etc., install the corresponding capacity regulating valve 2 at each connection end face 10. Furthermore, when there are multiple capacity regulating valves 2 , connecting pipes can be used to connect the regulating chambers 23 of all capacity regulating valves 2 to facilitate subsequent simultaneous control of multiple capacity regulating valves 2 .

In other embodiments, the capacity adjustment valve seat 21 and the connection end surface 10 of the fixed scroll 1 are sealed by a sealing gasket.

In some other embodiments, a groove 12 is provided on the connection end surface 10 of the fixed scroll 1 , and the groove 12 covers all gas unloading exhaust ports 101 and all gas leakage exhaust ports 102 to form an adjustment cavity. Chamber 23, as shown in Figure 15.

In order to further optimize the implementation effect of the present invention, in other embodiments, the remaining feature technologies are the same, except that the connection end surface 10 of the fixed scroll 1 is on the side area of the fixed scroll 1, and the capacity The regulating valve 2 is installed horizontally on the side of the fixed scroll 1 .

Using the above preferred solution, on the one hand, the capacity adjustment valve 2 is more convenient to install, and on the other hand, the capacity adjustment valve 2 can quickly switch between the sealing position and the release position without adding additional elastic return parts or seals, which greatly improves the capacity adjustment. Valve 2 life and reliability.

In order to further optimize the implementation effect of the present invention, in other embodiments, the remaining feature technologies are the same, except that the connection end surface 10 of the fixed scroll 1 is also provided with a guide hole 103 and a capacity adjustment valve plate. 22 is provided with a guide portion 221, which can shuttle in the guide hole 103. The guide portion 221 and the guide hole 103 are used to guide the movement direction of the capacity regulating valve plate 22.

Using the above preferred solution, the capacity adjustment valve plate 22 switches between the sealing position and the release position more stably, and the capacity adjustment valve plate 22 will not shift. Among them, the capacity adjustment valve plate 22 is a T-shaped valve plate, specifically including: a disc-shaped valve plate 222 and a guide portion 221. The T-shaped valve plate can be processed as a whole or in the form of split connection. It is made of a circular disc with a hole and a guide rod riveted or interference pressed.

Of course, in other embodiments, the guide hole 103 on the fixed scroll 1 can be eliminated, and the own structure of the capacity adjustment valve plate 22 is used for guidance. For example, the capacity adjustment valve plate 22 is a thicker cylindrical valve plate. 223, as shown in Figure 7.

In order to further optimize the implementation effect of the present invention, in other embodiments, the remaining feature technologies are the same, except that all gas unloading exhaust ports 101 on the connecting end face 10 can be connected to each other through the communication groove 104; and All gas leakage vents 102 on the connecting end face 10 can communicate with each other through the communication grooves 104 .

The above preferred solution is adopted to increase the area of the gas discharge flow channel. And in this embodiment, the communication groove 104 is a C-shaped groove, as shown in FIG. 8 .

In order to further optimize the implementation effect of the present invention, in other embodiments, the remaining feature technologies are the same, except that the fixed scroll 1 includes: a fixed scroll lower half 131 with a scroll profile and a The fixed scroll upper half 132 is connected to the end surface 10, and the fixed scroll lower half 131 is fixedly connected to the fixed scroll upper half 132;

Eight symmetrically distributed unloading holes 14 are provided in the scroll inner ring area of the scroll profile, and an unloading channel is provided in the lower half 131 of the fixed scroll to connect the unloading holes 14 and the gas unloading exhaust port 101 .

Using the above preferred solution, the fixed scroll 1 is divided into a fixed scroll upper half 132 and a fixed scroll lower half 131. The structure of the fixed scroll 1 is reasonable.

Furthermore, two gas unloading exhaust ports 101 are arranged side by side on the upper half of the fixed scroll 132 near its lower end surface, and two gas leakage exhaust ports 102 are arranged side by side above the two gas unloading exhaust ports 101. , the total discharge port 11 is provided on the upper end surface of the fixed scroll upper half 132 .

The fixed scroll lower half 131 is provided with a scroll profile, and the fixed scroll lower half 131 is provided with eight symmetrically arranged unloading holes 14, which are located in the scroll inner ring area. The function of the unloading hole 14 is to discharge the gas in the inner ring area of the scroll in time when the scroll compressor is working, so that the partial profile of the outermost ring of the scroll does not produce a compression effect, resulting in a reduction in the scroll displacement, reaching The purpose of capacity adjustment.

Among them, the upper half of the fixed scroll 132 has an annular structure, and two gas discharge grooves 15 (i.e., unloading channels) are provided on its lower end surface, and their positions just cover the eight unloading holes 14 of the lower half of the positioning scroll, so that The unloading holes 14 on both sides are connected with the gas discharge grooves 15 respectively.

In other embodiments, the number of unloading holes 14 can also be 4, 6, 10, 12, etc., and its diameter and position can also be adjusted within a certain range, depending on the capacity adjustment ratio. The smaller the adjustment ratio, the more unloading holes 14 are needed and the larger the diameter.

In some other embodiments, as shown in Figure 9, the number of unloading holes 14 is increased to 2 pairs of unloading holes 14; the upper half of the fixed scroll 132 is provided with 2 Y-shaped gas discharge grooves 15, corresponding to 2 pairs of unloading holes. Hole 14 improves capacity adjustment capability.

In order to further optimize the implementation effect of the present invention, in other embodiments, the remaining feature technologies are the same, except that, as shown in Figure 10, the connecting end 41 of the connecting pipe 4 is in a spherical shape, and is close to the connecting end. The position 41 is provided with a notch 42 for placing the seal.

Using the above-mentioned preferred solution, the connecting pipe 4 has an ingenious structure. The spherical connecting end 41 extends into the connecting port and can freely float axially without generating additional stress, and is further sealed by a seal to prevent air leakage. At the same time, a certain assembly error can be allowed between the capacity adjustment valve seat 21 and the solenoid valve seat 31 during assembly, that is, the two are not aligned. The connecting pipe 4 may be a flexible connecting pipe 4 .

Specifically, the connecting pipe 4 can be arranged transversely or longitudinally, as shown in Figure 13.

In order to further optimize the implementation effect of the present invention, in other embodiments, the remaining feature technologies are the same, except that, as shown in Figure 4, the capacity adjustment valve seat 21 is provided with a first connection port 211 and a second connection port 211. Connection port 212, the first connection port 211 is connected to the high-pressure pressure port 105 of the fixed scroll 1 through its pressure port 213, and the second connection port 212 is connected to the adjustment chamber 23;

Among them: the high-pressure pressure port 105 is also provided on the connection end surface 10 of the fixed scroll 1, and is connected to the high-pressure chamber area (such as the scroll exhaust port 18) through its internal channel to induce high pressure.

Using the above preferred solution, the capacity adjustment valve seat 21 has a simple structure and is easy to install. In some other embodiments, the valve seat of the capacity regulating valve 2 includes: a first valve seat and a second valve seat that are independent of each other; the first connection port 211 is provided on the first valve seat, and the second connection port 212 is provided on the second valve seat. on the valve seat. In other embodiments, the first connection port 211 may be directly connected to the high-pressure chamber area of the fixed scroll 1 .

Further, as shown in Figures 11-12, the control component 3 includes: a solenoid valve seat 31 and a solenoid valve body 32 connected to the solenoid valve seat 31. The solenoid valve body 32 is installed on the flange of the solenoid valve seat 31. On the end face 311, the solenoid valve seat 31 is provided with a third connection port 313, a fourth connection port 314 and a low-pressure pressure port 312. The third connection port 313 and the fourth connection port 314 are connected to the capacity regulating valve through the connecting pipe 4 respectively. The first connection port 211 and the second connection port 212 of the base 21 are connected;

The solenoid valve body 32 is used to control the second connection port 212 to switch between communicating with the low-pressure pressure port 312 and communicating with the first connection port 211 .

Using the above preferred solution, the control component 3 has a simple structure and can realize rapid control of the capacity regulating valve 2 . Among them, the solenoid valve seat 31 is fixed to the casing 61 of the scroll compressor by welding or other methods.

Furthermore, the solenoid valve seat 31 is also provided with mutually independent interfaces A, B, and C, and the solenoid valve body 32 is provided with interfaces A and B corresponding to interfaces A, B, and C. , interface c;

Interface A is connected to the low-pressure pressure port 312, interface B is connected to the third connection port 313, and interface C is connected to the fourth connection port 314;

When the solenoid valve body 32 is powered on, interface c is connected to interface b, and interface c is not connected to interface a;

When the solenoid valve body 32 is in a power-off state, the interface c is connected to the interface a, and the interface c is not connected to the interface b.

Using the above preferred solution, the solenoid valve seat 31 and the solenoid valve body 32 have simple structures.

In some embodiments, the solenoid valve seat 31 and the solenoid valve body 32 may be connected through a copper pipe 5, as shown in Figure 13.

The solenoid valve body 32 is a two-position three-way solenoid valve, which includes a valve body and a coil. It is connected to the scroll compressor through a flange, and the flange is sealed with a sealing gasket.

In addition, an embodiment of the present invention also discloses a variable-capacity scroll compressor, including: the capacity adjustment device disclosed in any of the above embodiments.

As shown in Figure 14, the scroll compressor is introduced in detail below, which includes: casing 61, stator assembly 62, rotor assembly 63, orbiting scroll 64, main bearing assembly 65, bottom bearing assembly 66, silencer cover assembly 67 , bottom cover assembly 68 and top cover assembly 69, the orbiting scroll 64 meshes with the fixed scroll 1 to form a series of symmetrical compression chambers.

Among them, the fixed scroll 1 includes: a fixed scroll upper half 132 and a fixed scroll lower half 131 connected by fixing bolts.

Furthermore, the fixed scroll lower half 131 is provided with a scroll profile, and the fixed scroll lower half 131 is provided with eight symmetrically arranged unloading holes 14, which are located in the scroll inner ring area.

Furthermore, the fixed scroll lower half 131 is provided with a back pressure hole 16 extending through the axial direction thereof. A circular boss 17 is provided on the upper end surface of the fixed scroll lower half 131. A scroll exhaust port 18 and two advance exhaust ports 19 are provided on the circular boss 17. The advance exhaust port 19 is provided with There is a one-way valve plate 71 and a valve plate 72. The function of the advanced exhaust port 19 is that when the compression ratio of the scroll is greater than the pressure ratio of the external exhaust and suction, the valve plate of the advanced exhaust port 19 opens, allowing the compression chamber to Exhaust when compressing to advance exhaust port 19 to avoid over-compression of the vortex and improve the energy efficiency of the vortex.

Furthermore, keyways for connecting the Oldham slip ring 610 are provided on both sides of the fixed scroll lower half 131 .

The upper half of the fixed scroll 132 has an annular structure, and is provided with two gas discharge grooves 15 (i.e., unloading channels) on its lower end face. Its position just covers the eight unloading holes 14 of the lower half of the positioning scroll, so that the gas discharge grooves 15 on both sides are The unloading holes 14 are respectively connected with the gas discharge grooves 15.

Furthermore, a back pressure connection channel 110 connected to the back pressure hole 16 is also provided on the fixed scroll upper half 132 . The upper end surface of the upper half of the fixed scroll 132 is provided with a back pressure cavity groove 111, and the back pressure cavity groove 111 is connected with the back pressure connection channel 110. The back pressure cavity groove 111 and the floating seal disk 611 form a back pressure cavity, which provides axial pressure for the fixed scroll 1 to compress it with the movable scroll 64 to avoid axial leakage.

Furthermore, the back-pressure connection channel 110 of the fixed scroll upper half 132 is provided with a step hole to prevent the back-pressure connection channel 110 and the back-pressure hole 16 from being inconcentric due to assembly errors and affecting the communication effect between the two.

Furthermore, the inner ring part of the fixed scroll upper half 132 is provided with an O-ring groove 112 for placing the O-ring 612 to improve the tight connection between the fixed scroll upper half 132 and the fixed scroll lower half 131. properties to prevent the high-pressure gas in the exhaust part of the scroll from leaking between the upper and lower halves of the fixed scroll. Of course, the fixed scroll upper half 132 and the fixed scroll lower half 131 can also be sealed by a sealing gasket to prevent high-pressure gas from leaking at the connection surface between the upper and lower parts.

The connection end face 10 is provided on the upper half of the fixed scroll 132. There are 2 gas unloading exhaust ports 101, 2 gas leakage exhaust ports 102, 1 high-pressure pressure port 105, One guide hole 103, several pin holes 106 and several bolt holes 107. The pin holes 106 are used to place pins to position the capacity adjustment valve seat 21; the bolt holes 107 are used to fix the capacity adjustment valve seat 21.

Furthermore, the above-mentioned high-pressure pressure port 105 can also be connected to the back-pressure chamber, and the non-vortex exhaust port 18 can also achieve the same effect.

The capacity adjustment principle of the scroll compressor of this utility model is introduced below. The scroll compressor has two modes: full load mode and half load mode.

Full load mode: During the operation of the scroll compressor, the unit control panel controls the solenoid valve 32 to be energized, the solenoid valve 32 interface c is connected to the interface b, and the high-pressure gas connected to the high-pressure pressure port 105 passes through the following route: first connection port 211 - Connecting pipe 4 - Third connecting port 313 - Interface B - Solenoid valve 32 interface b - Solenoid valve 32 interface c - Fourth connecting port 314 - Connecting pipe 4 - Second connecting port 212, enter the regulating chamber of capacity regulating valve 2 Room 23.

Since the inside of the capacity adjustment valve plate 22 is at medium and low pressure and the outside is at high pressure, the valve plate moves to the sealing position under the action of the pressure difference, and all the gas unloading and exhaust ports 101 and all the gas leakage and exhaust ports 102 are fully covered and compressed. , forming a seal so that they cannot communicate with each other. At this time, the unloading hole 14 cannot discharge the gas in the compression chamber from the scroll, and the scroll displacement is maintained at 100%. At this time, the compressor operates at 100% capacity.

Half-load mode: During the operation of the scroll compressor, the unit control panel controls the solenoid valve 32 to be powered off, the solenoid valve 32 interface c is connected to the interface a, and the low-pressure gas in the shell 61 connected to the low-pressure pressure port 312 passes through the following route : Low-pressure pressure port 312 - interface A - solenoid valve 32 interface a - solenoid valve 32 interface c - fourth connection port 314 - connecting pipe 4 - second connection port 212, entering the adjustment chamber 23 of the capacity adjustment valve 2.

Since the inside of the capacity adjustment valve plate 22 is at medium and low pressure and the outside is at low pressure, the valve plate moves to the release position under the action of the pressure difference and air flow. The gas unloading exhaust port 101 and the gas leakage exhaust port 102 are connected to each other. At this time, the unloading hole 14 passes the gas in the compression chamber through the following route: unloading channel - gas unloading exhaust port 101 - gas leakage exhaust port 102 - general exhaust port 11, and discharges the vortex, causing the vortex to absorb air on the profile line Ineffective compression is formed in the initial range, the scroll effective profile length is shortened, and the displacement is reduced to about 65%. At this time, the compressor operates at 65% capacity.

The scroll compressor disclosed in the utility model can change its displacement without changing the rotation speed, that is, change its cooling or heating output capacity, thereby better adapting to changes in environmental loads and reducing the frequency of starting and stopping the unit. , to achieve the purpose of improving the energy efficiency of the unit.

In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", " The orientations or positional relationships indicated by "top", "inner", "front", "center", "both ends", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. , rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention.

In this utility model, unless otherwise expressly stipulated and limited, the terms "installation", "setting", "connection", "fixing", "rotating" and other terms should be understood in a broad sense. For example, it can be a fixed connection, It can also be detachably connected, or integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction of two elements relationship, unless otherwise explicitly limited, those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific circumstances.

The basic principles and main features of the present utility model and the advantages of the present utility model have been shown and described above. Those skilled in the industry should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and instructions is only for illustration. The principle of the present utility model, without departing from the spirit and scope of the utility model, there will be various changes and improvements in the utility model. These changes and improvements all fall within the scope of the claimed utility model. The utility model The scope of protection claimed is defined by the appended claims and their equivalents.

The control method of this utility model is controlled by manually starting and closing the switch. The wiring diagram of the power components and the supply of the power supply belong to common knowledge in the field, and this utility model is mainly used to protect the mechanical device, so the details of this utility model will not be repeated. Explain controls and wiring arrangements.

Claims (10)

1. Capacity adjustment device, characterized in that it includes: The fixed scroll is provided with at least one gas unloading exhaust port and at least one gas leakage exhaust port on the connecting end surface of the fixed scroll, wherein: the gas unloading exhaust port passes through the fixed scroll The internal channel of the disk is connected to at least one unloading hole in the scroll inner ring area, and the unloading hole is connected to the compression chamber of the scroll compressor. The gas leakage outlet passes through another interior of the fixed scroll. The channel is connected with at least one general discharge port thereof, and the gas discharge outlet is connected with the low-pressure chamber of the scroll compressor; Capacity regulating valve, the capacity regulating valve is installed on the connection end surface of the fixed scroll, and includes: a capacity regulating valve seat and a capacity regulating valve plate. A formation is formed between the capacity regulating valve seat and the connecting end surface of the fixed scroll. An adjustment chamber, the capacity adjustment valve plate is placed in the adjustment chamber and can be moved and switched between the sealing position and the release position; When the capacity regulating valve plate is in the sealing position, it can completely cover all gas unloading exhaust ports and all gas leakage exhaust ports on the connection end face; When the capacity adjustment valve plate is in the release position, it does not cover the gas unloading exhaust port and the gas leakage exhaust port, and the gas unloading exhaust port is connected with the gas leakage exhaust port; A control component, the control component is connected to the capacity adjustment valve seat, and is used to control the movement and switching of the capacity adjustment valve plate between the sealing position and the release position. 2. The capacity adjustment device according to claim 1, wherein the connection end surface of the fixed scroll is on the side area of the fixed scroll, and the capacity adjustment valve is installed on the fixed scroll. The side of the wheel. 3. The capacity adjusting device according to claim 1, wherein a guide hole is provided on the connection end surface of the fixed scroll, and a guide portion is provided on the capacity adjustment valve plate, and the guide portion can The guide part and the guide hole are used to guide the movement direction of the capacity regulating valve plate. 4. The capacity adjustment device according to claim 1, characterized in that all gas unloading exhaust ports on the connecting end surface can be connected to each other; and / or; All gas leakage vents on the connecting end face can be connected to each other. 5. The capacity adjusting device according to claim 1, wherein the fixed scroll includes: a lower half of the fixed scroll with a scroll profile and an upper half of the fixed scroll with a connecting end surface, so The lower half of the fixed scroll is fixedly connected to the upper half of the fixed scroll; A number of unloading holes are provided in the scroll inner ring area of the scroll profile, and an unloading channel is provided in the lower half of the fixed scroll to connect the unloading holes and the gas unloading exhaust port. 6. The capacity adjusting device according to claim 1, characterized in that the control component and the capacity adjusting valve seat are connected through a connecting pipe, the connecting end of the connecting pipe is in a spherical shape, and is located close to the connecting end. Provides slots for seals. 7. The capacity adjusting device according to claim 1, wherein the capacity adjusting valve seat is provided with a first connection port and a second connection port, and the first connection port is connected to the fixed scroll plate. The high-pressure pressure port or the high-pressure chamber area is connected, and the second connection port is connected with the adjustment chamber; Wherein: the high-pressure pressure port is also provided on the connecting end surface of the fixed scroll, and is connected to the high-pressure cavity area through its internal channel to introduce high pressure. 8. The capacity adjustment device according to claim 7, wherein the control component includes: a solenoid valve seat and a solenoid valve body connected to the solenoid valve seat, and the solenoid valve seat is provided with There are a third connection port, a fourth connection port and a low-pressure pressure port, and the third connection port and the fourth connection port are respectively connected to the first connection port and the second connection port of the capacity adjustment valve seat through connecting pipes; The solenoid valve body is used to control the second connection port to switch between communicating with the low-pressure pressure port and communicating with the first connection port. 9. The capacity adjusting device according to claim 8, characterized in that the solenoid valve seat is also provided with mutually independent interfaces A, B and C, and the solenoid valve body is provided with The interface A, interface B, and interface C correspond one-to-one to interface a, interface b, and interface c; The interface A is connected to the low-pressure pressure port, the interface B is connected to the third connection port, and the fourth connection port of interface C is connected; When the solenoid valve body is powered on, interface c is connected to interface b, and interface c is not connected to interface a; When the solenoid valve body is in a power-off state, interface c is connected to interface a, and interface c is not connected to interface b. 10. A variable-capacity scroll compressor, characterized by comprising: the capacity adjusting device according to any one of claims 1-9.