CN221257121U - Scroll compressor having a rotor with a rotor shaft having a rotor shaft with a - Google Patents

Abstract

The embodiment of the application provides a scroll compressor. The scroll compressor includes: a housing; a fixed scroll disposed within the housing and forming a discharge chamber of the scroll compressor with a space between the housing, the fixed scroll including an end plate and a fixed scroll wrap protruding from the end plate; the movable vortex disc is arranged in the shell and is provided with a movable vortex roll, and the movable vortex roll and the fixed vortex roll are matched to form a compression cavity for compressing a refrigerant; and an exhaust port formed at the center of the end plate of the fixed scroll for exhausting the refrigerant compressed in the compression chamber; the scroll compressor further includes a cooling device for reducing the temperature of the refrigerant at the discharge port.

Description

Scroll compressor having a rotor with a rotor shaft having a rotor shaft with a

Technical Field

The application relates to the technical field of compressors, in particular to a vortex compressor.

Background

During operation of a scroll compressor, under-compression occurs when the pressure of the gas discharged from the compression chamber is less than the pressure of the discharge chamber (also referred to as the high pressure chamber) of the compressor, resulting in backflow of a medium such as a refrigerant into the compression chamber. Part of the refrigerant gas flowing back is repeatedly compressed in the compression chamber, resulting in an increase in gas temperature, thereby making the discharge temperature of the compressor discharge chamber higher than a theoretical value. Meanwhile, an increase in temperature in the compression chamber due to an increase in temperature of the refrigerant gas may cause irreversible damage to the compressor.

Disclosure of utility model

The present application provides a scroll compressor, comprising: a housing; a fixed scroll disposed within the housing and forming a discharge chamber of the scroll compressor with a space between the housing, the fixed scroll including an end plate and a fixed scroll wrap protruding from the end plate; the movable vortex disc is arranged in the shell and is provided with a movable vortex roll, and the movable vortex roll and the fixed vortex roll are matched to form a compression cavity for compressing a refrigerant; and an exhaust port formed at the center of the end plate of the fixed scroll for exhausting the refrigerant compressed in the compression chamber; the scroll compressor further includes a cooling device for reducing the temperature of the refrigerant at the discharge port.

Optionally, the cooling device includes: a heat exchange unit disposed inside the case for absorbing heat of the refrigerant by a cooling medium flowing through the heat exchange unit; and the external unit is arranged outside the shell, forms a closed loop with the heat exchange unit and is used for cooling the cooling medium flowing through the external unit.

Optionally, the heat exchange unit is located in the discharge chamber of the scroll compressor and includes a heat exchange tube disposed proximate the discharge port.

Optionally, the heat exchange tube is a spiral coil disposed along an inner surface of the exhaust port.

Optionally, the exhaust port is a step hole, and comprises a first through hole close to the static vortex coil and a second through hole communicated with the first through hole, wherein the diameter of the second through hole is larger than that of the first through hole; the spiral coil is arranged along the inner surface of the second through hole.

Optionally, the external unit comprises a water tank or a cooling coil.

Optionally, the cooling device further comprises: the connecting pipeline is used for connecting the heat exchange unit and the external unit; and the sealing unit is arranged between the connecting pipeline and the shell and is used for sealing a gap between the connecting pipeline and the shell.

Optionally, the external unit further includes: and the circulating pump is used for driving the cooling medium to circulate between the heat exchange unit and the water tank or the cooling coil.

Optionally, the cooling medium is air, water or oil.

Optionally, the connecting pipeline and the heat exchange unit are integrally formed, and the external unit is detachably connected with the connecting pipeline.

In the scroll compressor provided by the embodiment of the application, by arranging the cooling device, when the scroll compressor works in the under-compression state, the temperature of the compressed medium in the discharge cavity of the compressor is not too high, so that the compressor can still maintain normal work in the state, and the operation application range of the compressor is enlarged.

Drawings

Fig. 1 is a schematic structural view of a scroll compressor provided in an embodiment of the present application.

Fig. 2 is a schematic illustration of the mating of the fixed and orbiting scroll wraps of fig. 1.

Fig. 3 is a partially enlarged view of fig. 1.

Fig. 4 is a partial isometric view of fig. 3.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better illustration of the application. It will be understood by those skilled in the art that the present application may be practiced without some of these specific details. In some instances, well known methods and means have not been described in detail in order to not obscure the present application.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

Furthermore, the terms "first," "second," and the like, if any, are used merely for distinguishing between descriptions and not for indicating or implying a relative importance.

The scroll compressor is a positive displacement compressor with unidirectional continuous compression process, has the characteristics of high volume rate and high reliability, and is widely applied to the fields of heat pumps and air conditioners. The working principle of the vortex compressor is that the movable vortex disk does non-rotary translational motion around the base circle center of the static vortex disk, and the volume of a compression cavity formed by the joint of the movable vortex disk and the static vortex disk is gradually reduced, so that the purpose of compressing gas is achieved. The compressed medium in the compression chamber is discharged to a discharge chamber (also called a high-pressure chamber) in the compressor housing through an exhaust hole in the center of the fixed scroll, and then discharged through a discharge port of the discharge chamber.

Scroll compressors are typically of a constant internal volume ratio, i.e., constant compression, due to their own structural characteristics. When the working condition of the compressor changes, under-compression can occur, and the pressure of gas discharged from the compression cavity is lower than the pressure of the discharge cavity, so that mediums such as refrigerant and the like flow back into the compression cavity; part of the refrigerant gas flowing back is repeatedly compressed in the compression cavity, so that the temperature of the gas in the compression cavity is higher; in this case, the compressor may be caused to operate in an abnormal state, possibly causing irreversible damage to the compressor.

In general, spray or wet spray may be employed, i.e., spraying the refrigerant in the heat pump or air conditioning cycle into the compression chamber in an attempt to reduce the temperature of the refrigerant at the discharge port. But this approach increases the power consumption and refrigerant charge of the system as well as the complexity of the system.

Therefore, how to reduce the discharge temperature of the compressor under the under-compression condition is a problem to be solved.

In view of the foregoing, embodiments of the present application provide a scroll compressor, and the following describes the scroll compressor according to the embodiments of the present application in detail with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of a scroll compressor 10 provided in an embodiment of the present application, fig. 3 is a partially enlarged view of fig. 1, and fig. 4 is a partial isometric view of a fixed scroll and a cooling device; it should be noted that, for convenience of the following description, fig. 3 and 4 simplify the structure of the scroll compressor, the related structure of the discharge valve is hidden in fig. 3, and fig. 4 only shows the partial structures of the fixed scroll and the cooling device.

As shown in fig. 1, the scroll compressor 10 provided in the embodiment of the present application includes a housing 11, a fixed scroll 12, an orbiting scroll 13, and a cooling device 14, in addition to other components. The housing 11 is cylindrical for forming a cylindrical closed space of the scroll compressor 10 to accommodate various components therein.

In some embodiments, the housing 11 may include an upper housing, a lower housing, and a middle housing, and the portions of the housing 11 may be connected by welding. The upper and lower cases may be formed of a metal plate by pressing or the like, and the intermediate case may be formed of a metal plate by winding and welding.

In some embodiments, the housing 11 is provided with an intake port and an exhaust port, each in communication with a compression chamber inside the scroll compressor via a conduit. The medium waiting for compression of the refrigerant enters the compression cavity through the air inlet port, and is discharged from the air outlet port after being compressed.

The fixed scroll 12 is fixedly provided in the inner cavity of the housing 11, and includes an end plate 121 and a fixed scroll 122 protruding from one surface of the end plate. The space between the end plate of the fixed scroll 12 and the housing 11 forms a discharge chamber 15 of the scroll compressor for discharging the compressed gas such as the refrigerant to the outside of the compressor through a discharge port.

The orbiting scroll 13 is disposed in an inner cavity of the housing 11 and rotatably supported on the frame, and the orbiting scroll 13 is engaged with the fixed scroll 12 to form a compression chamber.

The orbiting scroll 13 includes a disk-shaped base plate 131 and an orbiting scroll 132 projected from one surface of the disk-shaped base plate 131. Orbiting scroll wrap 132 and non-orbiting scroll wrap 122 are engaged with each other as shown in FIG. 2 to form a series of crescent-shaped compression pockets.

An exhaust port 1211 is formed in the center of the end plate 121 of the fixed scroll 12, and the exhaust port 1211 penetrates the end plate 121 in the axial direction of the end plate 121.

In some embodiments, the exhaust port 1211 is a stepped bore including a first through bore 1211A proximate to the fixed scroll 122 and a second through bore 1211B in communication with the first through bore 1211A. The second through hole 1211B has a diameter larger than that of the first through hole 1211A.

A discharge valve 16 is further provided between the discharge port 1211 and the discharge chamber 15, the discharge valve 16 being a check valve, when the pressure of the refrigerant in the compression chamber is greater than the opening pressure of the discharge valve 16, the valve plate of the discharge valve 16 is opened, at this time, the compression chamber is communicated with the discharge chamber 15, and the compressed refrigerant is discharged from the compression chamber to the discharge chamber 15 through the discharge port 1211 and the discharge valve 16, and is discharged to the outside of the compressor through the discharge port 151 of the discharge chamber 15.

With continued reference to fig. 1, the scroll compressor 10 further includes a cooling device 14 for reducing the temperature of the refrigerant at the discharge port 1211, the cooling device 14 including a heat exchange unit 141 disposed within the housing 11, preferably within the discharge chamber 15 of the scroll compressor. When the cooling medium flows through the heat exchange unit 141, the heat exchange unit 141 can absorb heat of the surrounding refrigerant through the cooling medium. The heat exchanging unit 141 may be, for example, a heat exchanging copper tube, and the cooling medium may be any flowing substance capable of lowering the temperature of the object, for example, a medium such as air, water or oil. In this case, when the heat exchange copper pipe is operated, the cooling medium flows in the hollow copper pipe, and heat of the refrigerant at the discharge port 1211 is transferred to the cooling medium through the copper pipe and is taken away by the flowing cooling medium.

In some embodiments, the cooling medium is water. Because the vaporization latent heat of the water is larger (the vaporization latent heat of the water is 2260kJ/kg under the working condition of 100 ℃/0.1 Mpa), and the water is used as a cooling medium, the system can be filled with a small amount of water, and a good heat exchange effect can be realized.

The cooling device 14 further includes an external unit 142, where the external unit 142 is disposed outside the housing and forms a closed loop with the heat exchange unit 141, for cooling the cooling medium flowing through the external unit 142. After the cooling medium flowing through the heat exchange unit 141 exchanges heat with the high temperature refrigerant at the exhaust port 1211, the temperature rises, and after passing through the external unit, the heat carried by the cooling medium is transferred away, so that the cooling medium is cooled again and flows back to the heat exchange unit 141.

In some embodiments, the external unit 142 is a water tank or a cooling coil. When the external unit 142 is a water tank, the water flowing through the heat exchange unit 141 is heated up by heat absorption, and is mixed with water at normal temperature in the water tank after passing through the water tank, so that the temperature of the water is reduced; the heat carried by the water can be transferred through the evaporation of the water in the water tank, or measures such as forced heat dissipation can be adopted for the water tank so as to reduce the temperature of the water in the water tank. When the external unit 142 is a cooling coil, heat exchange with air can be performed by providing cooling fins or the like on the cooling coil, thereby reducing the temperature of the cooling medium flowing through the cooling coil.

In the cooling device 14, the heat exchange unit 141 is an evaporator, the external unit 142 is a condenser, and the cooling medium absorbs heat from the discharge chamber 15 when flowing through the heat exchange unit, and then releases the heat to the environment through the external unit 142, which realizes recycling of the cooling medium.

By providing the cooling device 14 in the scroll compressor, the temperature of the compressed medium in the discharge chamber 15 is not too high when the scroll compressor 10 is operated in the under-compression state, so that the compressor can still maintain normal operation in the state, and the operation application range of the compressor is enlarged.

In some embodiments, the heat exchange unit 141 includes heat exchange tubes disposed proximate to the exhaust port 1211. The speed at which the exhaust temperature decreases can be increased by disposing the heat exchange pipe at a position close to the exhaust port 1211.

In some embodiments, the heat exchange tube is made of metal with good heat conducting performance, such as copper or aluminum.

The arrangement of the heat exchange tube according to the embodiment of the present application is not particularly limited, and as a preferred embodiment, the heat exchange tube is a spiral coil as shown in fig. 3 and 4, the spiral coil is disposed inside the exhaust port around the exhaust port 1211, and the center of the spiral line of the spiral coil coincides with the axis of the exhaust port 1211. Through setting up the heat exchange tube into helical coil, can increase the area of contact of heat exchange tube and refrigerant to improve heat exchange efficiency.

In some embodiments, as described above, the exhaust port 1211 is a stepped hole formed by the first through hole 1211A and the second through hole 1211B, and the spiral coil is disposed next to the inner surface of the second through hole 1211B, so that the exhaust port 1211 is not covered or blocked, and the compressed refrigerant and other mediums can be smoothly discharged from the exhaust port 1211.

In some embodiments, the external unit 142 further includes a circulation pump for driving the cooling medium to circulate between the heat exchange unit 141 and the external unit 142.

In some embodiments, the cooling device 14 further includes a connection pipe 143, referring to fig. 3 and 4, where the connection pipe 143 includes a first pipe 143A and a second pipe 143B, and the first pipe 143A connects the liquid inlet of the heat exchange unit 141 and the liquid outlet of the external unit 142, and the second pipe 143B connects the liquid outlet of the heat exchange unit 141 and the liquid inlet of the external unit 142.

In some embodiments, the first pipe 143A and the second pipe 143B are integrally formed with the heat exchanging unit 141.

With continued reference to fig. 3, in the scroll compressor provided by the embodiment of the present application, the external unit 142 of the cooling device 14 is disposed outside the housing 11, and the external unit is connected to the heat exchange unit through the connection pipe 143. Thus, to facilitate the routing of the tubing, in some embodiments, a mounting hole may be provided in the top of the upper housing of housing 11 to allow connection tubing 143 to pass through the mounting hole. In the example of fig. 3, two through holes 111A and 111B are formed in the housing 11, and the first pipe 143A and the second pipe 143B pass through the two mounting holes, respectively.

It should be further noted that, the upper casing in the casing 11 and the fixed scroll 12 together define the discharge chamber 15 of the scroll compressor 10, and the opening of the through holes 111A and 111B in the upper casing may cause a problem that the discharge chamber 15 is not tightly sealed.

Accordingly, in some embodiments, a sealing unit 144 is also provided in the cooling device 14, the sealing unit 144 comprising a first seal 144A and a second seal 144B. The first sealing member 144A is disposed between the first pipe 143A and the through hole 111A, and the second sealing member 144B is disposed between the second pipe 143B and the through hole 111B to seal a gap between the two pipes and the corresponding through holes, thereby preventing the discharge chamber 15 from leaking air.

In some embodiments, the first seal 144A and the second seal 144B may be made of a material resistant to high temperatures, such as a material resistant to high temperatures, e.g., rubber.

In some embodiments, the connection pipe 143 is detachably connected to the external unit 142. The embodiment of the present application is not limited to the specific manner of the detachable connection, for example, threads may be formed at the end of the connection pipe 143, so that the connection pipe 143 is connected to the external unit 142 through threads.

In the description of the present application, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.

Claims (9)

1. A scroll compressor comprising:

A housing;

A fixed scroll disposed within the housing and forming a discharge chamber of the scroll compressor with a space between the housing, the fixed scroll including an end plate and a fixed scroll wrap protruding from the end plate;

The movable vortex disc is arranged in the shell and is provided with a movable vortex roll, and the movable vortex roll and the fixed vortex roll are matched to form a compression cavity for compressing a refrigerant; and

A discharge port formed at the center of the end plate of the fixed scroll for discharging the refrigerant compressed in the compression chamber;

Wherein the scroll compressor further comprises a cooling device for reducing the temperature of the refrigerant at the discharge port, the cooling device comprising:

And a heat exchange unit disposed inside the housing and in the discharge chamber of the scroll compressor, for absorbing heat of the refrigerant by a cooling medium flowing through the heat exchange unit, the heat exchange unit including a heat exchange pipe disposed near the discharge port.

2. The scroll compressor of claim 1, wherein the cooling device further comprises:

And the external unit is arranged outside the shell, forms a closed loop with the heat exchange unit and is used for cooling the cooling medium flowing through the external unit.

3. The scroll compressor of claim 1, wherein the heat exchange tube is a spiral coil disposed along an inner surface of the discharge port.

4. A scroll compressor according to claim 3, wherein the discharge port is a stepped bore comprising a first through bore adjacent the non-orbiting scroll and a second through bore in communication with the first through bore, the second through bore having a diameter greater than the diameter of the first through bore;

the spiral coil is arranged along the inner surface of the second through hole.

5. The scroll compressor of claim 2, wherein the external unit comprises a water tank or a cooling coil.

6. The scroll compressor of claim 2 or 5, wherein the cooling device further comprises:

The connecting pipeline is used for connecting the heat exchange unit and the external unit;

And the sealing unit is arranged between the connecting pipeline and the shell and is used for sealing a gap between the connecting pipeline and the shell.

7. The scroll compressor of claim 5, wherein the external unit further comprises:

And the circulating pump is used for driving the cooling medium to circulate between the heat exchange unit and the water tank or the cooling coil.

8. The scroll compressor of any one of claims 2-5, wherein the cooling medium is air, water, or oil.

9. The scroll compressor of claim 6, wherein the connection line is integrally formed with the heat exchange unit, and the external unit is detachably connected to the connection line.