CN216975229U

CN216975229U - Scroll compressor refrigerant sprays structure, scroll compressor and thermoregulation device

Info

Publication number: CN216975229U
Application number: CN202123456256.8U
Authority: CN
Inventors: 伍圣念; 冯旭伟; 相玲玲; 李文华; 凡沁
Original assignee: Wanbao Group Compressor Co ltd; Shijiazhuang Guoxiang Transportation Equipment Co Ltd
Current assignee: Wanbao Group Compressor Co ltd; Shijiazhuang Guoxiang Transportation Equipment Co Ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-07-15
Anticipated expiration: 2031-12-31

Abstract

The utility model discloses a refrigerant injection structure of a scroll compressor, the scroll compressor and temperature adjusting equipment, which comprise a fixed scroll and a moving scroll, wherein the fixed scroll and the moving scroll are mutually meshed and define a compression cavity inside, and a refrigerant injection hole is formed in the fixed scroll; automatic injection valve, including the connecting seat, case and elastomeric element, fixed vortex dish is equipped with the mounting groove, the connecting seat is connected with the mounting groove to inject the valve pocket inside the mounting groove, the connecting seat is equipped with the connecting seat hole with the valve pocket intercommunication, the refrigerant filling hole is connected between compression chamber and valve pocket, the connecting seat hole, valve pocket and refrigerant filling hole form the refrigerant and spray the route, the case sets up in the valve pocket, elastomeric element is connected with the case, the case controls the injection volume of refrigerant injection route under elastomeric element's elasticity and the effect of the pressure difference of both sides. The injection quantity can be automatically adjusted, the fault rate of the compressor can be effectively reduced, the reliability of the compressor is improved, and the service life of the compressor is prolonged.

Description

Scroll compressor refrigerant sprays structure, scroll compressor and thermoregulation device

Technical Field

The utility model is used in the field of compressors, and particularly relates to a refrigerant injection structure of a scroll compressor, the scroll compressor and temperature adjusting equipment.

Background

The scroll compressor is applied in harsh environment, and particularly for freezing and refrigerating purposes and heat pump purposes, the problem that the exhaust temperature is too high is easily caused due to the ultrahigh compressor ratio (more than 10), so that the air conditioning system needs to be provided with a refrigerant injection circuit and is solved by a refrigerant injection method (liquid, gas or gas-liquid mixture). At present, a refrigerant injection loop mainly adjusts the injection quantity through exhaust temperature signal feedback, but the injection effect is not ideal because the temperature response is not timely, and the cost is higher.

At present, the most common control logic of the refrigerant injection circuit mainly controls the opening of the electronic expansion valve of the injection circuit by collecting the exhaust temperature (the shell temperature or the exhaust pipe temperature), and when the exhaust temperature is higher, the opening of the electronic expansion valve is larger. This type of system is complex and costly.

The second common refrigerant injection loop control logic mainly controls the opening degree of an injection loop by acquiring the exhaust temperature and using a thermostatic expansion valve, wherein the opening degree of the thermostatic expansion valve is larger when the exhaust temperature is higher. The control precision of the system is poor, and the system response is slow.

The third kind of refrigerant jetting loop control logic is that the jetting loop is provided with thermosensitive bimetal sheet to sense exhaust temperature, and when the exhaust temperature exceeds the set temperature, the bimetal sheet is opened and the refrigerant jetting loop is opened immediately. This system has poor control accuracy and limited lifetime of the bimetal, and thus is not widely used.

SUMMERY OF THE UTILITY MODEL

The utility model aims to at least solve one of the technical problems in the prior art, and provides a refrigerant injection structure of a scroll compressor, the scroll compressor and a temperature regulating device, which can automatically regulate the injection amount, have simple and reliable structure and quick response, are very easy to realize, can effectively reduce the failure rate of the compressor, and improve the reliability and the service life of the compressor.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

in a first aspect, a refrigerant injection structure of a scroll compressor includes:

the scroll comprises a fixed scroll and a moving scroll, wherein the fixed scroll and the moving scroll are meshed with each other and define a compression cavity inside, and a refrigerant injection hole is formed in the fixed scroll;

the automatic injection valve comprises a connecting seat, a valve core and an elastic component, wherein the fixed scroll is provided with a mounting groove, the connecting seat is connected with the mounting groove, a valve cavity is limited in the mounting groove, the connecting seat is provided with a connecting seat hole communicated with the valve cavity, a refrigerant injection hole is connected between the compression cavity and the valve cavity, the connecting seat hole, the valve cavity and the refrigerant injection hole form a refrigerant injection path, the valve core is arranged in the valve cavity, the elastic component is connected with the valve core, and the valve core controls the injection amount of the refrigerant injection path under the action of the elastic force of the elastic component and the pressure difference between two sides.

With reference to the first aspect, in certain implementations of the first aspect, the elastic component includes a compression spring disposed in the valve cavity, and the valve element abuts against an end surface of the connection seat under the action of the compression spring and covers the connection seat hole.

With reference to the first aspect and the foregoing implementation manners, in some implementation manners of the first aspect, the connection base has a connection flange, and the connection base is connected to the fixed scroll by a fastening member provided on the connection flange.

With reference to the first aspect and the foregoing implementation manners, in some implementation manners of the first aspect, the connection seat has a boss embedded in the installation groove, and a first sealing ring is disposed between the boss and a groove wall of the installation groove.

With reference to the first aspect and the foregoing implementation manners, in some implementation manners of the first aspect, the connection device further includes a spray pipe, and an outlet end of the spray pipe is connected to the connection seat and is connected to the connection seat hole.

With reference to the first aspect and the foregoing implementation manners, in some implementation manners of the first aspect, a jack is disposed on a back side of the connection seat, the injection pipe is inserted into the jack, and a second sealing ring is disposed between the injection pipe and the jack.

In a second aspect, a scroll compressor includes the refrigerant injection structure of a scroll compressor according to any one of the implementations of the first aspect.

In a third aspect, a temperature adjusting device comprises an evaporator, a throttling element, a condenser and the scroll compressor of any implementation manner of the second aspect, wherein the scroll compressor, the condenser, the throttling element and the evaporator are connected through refrigerant pipelines to form a working circuit, and the inlet end of the injection pipe is connected to the working circuit between the condenser and the throttling element.

With reference to the third aspect, in certain implementations of the third aspect, a capillary tube is provided on the ejector tube.

With reference to the third aspect and the foregoing implementation manners, in certain implementation manners of the third aspect, an oil separator is disposed on the working circuit between the scroll compressor and the condenser, a subcooler and a dryer are disposed on the working circuit between the condenser and the throttling element, and a gas-liquid separator is disposed on the working circuit between the evaporator and the scroll compressor.

One of the above technical solutions has at least one of the following advantages or beneficial effects: the refrigerant injection structure of the scroll compressor has the working principle that when the injection pressure is greater than the sum of the pressure in the compression cavity and the pressure of the spring, the automatic injection valve is automatically opened to realize injection. The larger the pressure difference between two sides of the valve core is, the larger the injection quantity is, and the better the exhaust temperature cooling effect of the compressor is.

By adopting the refrigerant injection structure, the refrigerant injection amount can be automatically adjusted without exhaust temperature feedback. When the operating pressure ratio (the ratio of the exhaust pressure to the suction pressure) and the exhaust pressure of the air conditioning system deviate from the set injection boundary line of the compressor, the injection quantity is larger, so that the automatic injection function is realized according to the built-in control logic of the compressor. Because pressure control is shorter than temperature control, response time is shorter, so system control is more timely and accurate, and the exhaust temperature of the compressor can be effectively avoided from being too high, thereby ensuring the reliability of the compressor and the system.

The refrigerant injection structure of the utility model has the advantages that the automatic injection valve is arranged in the compressor, and the injection loop does not need temperature sensing parts and structures such as an electronic expansion valve, a thermal expansion valve, a thermosensitive bimetallic strip and the like, so the system is simpler and more reliable and has low cost.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic structural view of one embodiment of the scroll compressor of the present invention;

FIG. 2 is a schematic diagram of a refrigerant injection structure of the scroll compressor of FIG. 1 in accordance with one embodiment;

FIG. 3 is a schematic diagram of the working circuit configuration of one embodiment of the tempering apparatus of the present invention;

FIG. 4 is a schematic diagram of the injection logic of the refrigerant injection structure of the scroll compressor of the embodiment shown in FIG. 2.

Detailed Description

Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.

In the utility model, the meaning of "a plurality" is one or more, the meaning of "a plurality" is more than two, and the terms of "more than", "less than", "more than" and the like are understood to exclude the number; the terms "above", "below", "within" and the like are understood to include the instant numbers. In the description of the present invention, if there is description of "first" and "second" only for the purpose of distinguishing technical features, it is not to be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.

In the present invention, unless otherwise specifically limited, the terms "disposed," "mounted," "connected," and the like are to be understood in a broad sense, and for example, may be directly connected or indirectly connected through an intermediate; can be fixedly connected, can also be detachably connected and can also be integrally formed; may be mechanically coupled, may be electrically coupled or may be capable of communicating with each other; either as communication within the two elements or as an interactive relationship of the two elements. The specific meaning of the above-mentioned words in the present invention can be reasonably determined by those skilled in the art in combination with the detailed contents of the technical solutions.

Referring to fig. 1, an embodiment of the present invention provides a scroll compressor, which includes a casing 1, a fixed scroll 2, a moving scroll 3, an anti-rotation slip ring 4, a frame 5, a crankshaft 6, and a motor 7, wherein the casing 1 is provided with an air suction pipe 11 and an air discharge pipe 12. The fixed scroll 2 and the moving scroll 3 are meshed with each other, a compression cavity is defined in the fixed scroll, the motor 7 drives the moving scroll 3 to rotate through the crankshaft 6 and is meshed with the fixed scroll 2, and the working medium is continuously sucked into the air suction pipe 11 and compressed and then is discharged through the exhaust pipe 12.

Referring to fig. 1 and 2, the scroll compressor has a refrigerant injection structure of the scroll compressor, and the refrigerant injection structure of the scroll compressor solves the problem of overhigh exhaust temperature of the scroll compressor by a refrigerant injection method. The refrigerant injection structure of the spinning compressor comprises a scroll plate and an automatic injection valve, wherein a refrigerant injection hole 21 is formed in the fixed scroll plate 2, and the automatic injection valve is used for controlling the amount of refrigerant injected into a compression cavity through the refrigerant injection hole 21. The automatic injection valve comprises a connecting seat 81, a valve core 82 and an elastic component 83, wherein the fixed scroll 2 is provided with a mounting groove, the connecting seat 81 is connected with the mounting groove, a valve cavity 84 is defined in the mounting groove, the connecting seat 81 is provided with a connecting seat hole 85 communicated with the valve cavity 84, a refrigerant injection hole 21 is connected between the compression cavity and the valve cavity 84, the refrigerant injection hole 21 forms an opening at the bottom corner position or the side or the bottom position of the mounting groove, the connecting seat hole 85, the valve cavity 84 and the refrigerant injection hole 21 form a refrigerant injection path, the valve core 82 is movably arranged in the valve cavity 84, the elastic component 83 is connected with the valve core 82, and the valve core 82 controls the injection amount of the refrigerant injection path under the action of the elasticity of the elastic component 83 and the pressure difference between two sides.

The working principle of the refrigerant injection structure of the scroll compressor is as follows: in the initial state, the valve body 82 blocks the refrigerant injection path by the elastic member 83. When the scroll compressor works, the connecting seat hole 85 of the connecting seat 81 is communicated with a refrigerant in a working loop of the scroll compressor, and when the injection pressure is greater than the sum of the pressure in the compression cavity and the spring pressure, the automatic injection valve is automatically opened to realize injection. Moreover, the larger the pressure difference between the two sides of the valve core 82 is, the larger the opening degree of the valve core 82 is, the more refrigerants flow through the refrigerant injection path, the larger the injection amount is, and the better the cooling effect of the exhaust temperature of the compressor is, so that automatic control and adjustment are realized.

Referring to fig. 4, by design calculation, an injection boundary line is set, injection is performed in the upper left region of the operating range (when the exhaust temperature is high), and the farther from the injection boundary line (the higher the exhaust temperature), the larger the injection amount.

The elastic member 83 is used for providing an acting force for resetting the valve core 82 to block the injection path, and when the opening degree of the valve core 82 is larger, the resetting acting force provided for the valve core 82 is larger, and the elastic member 83 may be an elastic sheet, a compression spring or a tension spring, for example, in some embodiments, referring to fig. 2, the elastic member 83 includes a compression spring disposed in the valve cavity 84, and the valve core 82 abuts against the end surface of the connection seat 81 under the action of the compression spring and shields the connection seat hole 85.

The groove bottom of the mounting groove is provided with a groove 86, the end part of the compression spring is embedded in the groove 86, and the other end of the compression spring is connected with the valve core 82. The installation position of the compression spring is limited by the groove 86, and the stability of the structure is ensured.

Connecting seat 81 may be connected to fixed scroll 2 by welding, screwing, clamping, etc. for example, in some embodiments, referring to fig. 2, connecting seat 81 has a connecting flange 87, connecting flange 87 forms a flange structure, connecting seat 81 is connected to fixed scroll 2 by a fastening member 88 disposed on connecting flange 87, and a plurality of fastening members are circumferentially distributed around connecting seat 81 to realize stable connection of connecting seat 81.

Further, referring to fig. 2, the connection seat 81 has a boss embedded in the mounting groove, and a first sealing ring 89 is disposed between the boss and a wall of the mounting groove to prevent the refrigerant in the valve chamber 84 from leaking.

In some embodiments, referring to fig. 2, the scroll compressor refrigerant injection structure further includes an injection pipe 810, an outlet end of the injection pipe 810 is connected to the connection seat 81 and connected to the connection seat hole 85, for introducing the refrigerant in the scroll compressor operation circuit into the refrigerant injection structure.

Referring to fig. 2, the back side of the connection seat 81 is provided with a plug hole, the injection pipe 810 is plugged into the plug hole, and a second sealing ring 811 is disposed between the injection pipe 810 and the plug hole to realize the tight transition connection between the injection pipe 810 and the connection seat 81.

Referring to fig. 3, the embodiment of the present invention further provides a temperature adjustment device, which includes an evaporator 91, a throttling element 92, a condenser 93 and the scroll compressor 90 in any of the above embodiments, wherein the scroll compressor 90, the condenser 93, the throttling element 92 and the evaporator 91 are connected by a refrigerant pipeline to form a working circuit, and an inlet end of an injection pipe 810 is connected to the working circuit between the condenser 93 and the throttling element 92.

The refrigerant is led out from the condenser 93 (or a subcooler, the refrigerant is liquid) of the temperature adjusting device and flows back to the injection port of the compressor through the injection pipe 810, and meanwhile, the injection quantity of the refrigerant is automatically adjusted through an automatic injection valve arranged in the compressor. The scroll compressor of the temperature regulating device is internally provided with the automatic injection valve for automatically regulating the injection quantity, and the scroll compressor is simple and reliable in structure, quick in response and very easy to realize. The system injection loop can perform automatic injection according to the injection boundary line set by the compressor, and has faster response time than a temperature control mode, so that the fault rate of the compressor can be effectively reduced, and the reliability and the service life of the compressor are improved. The system is easy to popularize because of simple and reliable control logic and low cost.

In some embodiments, referring to fig. 3, a capillary tube 94 is provided on the ejector tube 810.

In some embodiments, an oil separator 95 is provided in the working circuit between the scroll compressor and the condenser 93, a subcooler 96 and a drier 97 are provided in the working circuit between the condenser 93 and the throttling element 92, and a gas-liquid separator 98 is provided in the working circuit between the evaporator 91 and the scroll compressor.

In the description herein, references to "an example," "an embodiment," or "some embodiments," etc., mean 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 utility model. In this specification, the schematic representations of the terms used above do not necessarily refer 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.

The utility model is not limited to the above embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the utility model, and such equivalent modifications or substitutions are included in the scope of the claims of the present application.

Claims

1. A refrigerant injection structure of a scroll compressor is characterized by comprising:

2. The refrigerant injection structure of a scroll compressor according to claim 1, wherein the resilient member comprises a compression spring disposed in the valve chamber, and the valve element abuts against an end surface of the connection seat under the action of the compression spring and shields the connection seat hole.

3. The refrigerant injection structure of scroll compressor as claimed in claim 1, wherein said connection seat has a connection flange, and said connection seat is connected to said fixed scroll by a fastening member provided to said connection flange.

4. The refrigerant injection structure of a scroll compressor according to claim 3, wherein said connection seat has a boss inserted into said mounting groove, and a first sealing ring is provided between said boss and a wall of said mounting groove.

5. The refrigerant injection structure of a scroll compressor according to any one of claims 1 to 4, further comprising an injection pipe, wherein an outlet end of the injection pipe is connected to the connection seat and connected to the connection seat hole.

6. The refrigerant injection structure of a scroll compressor according to claim 5, wherein an insertion hole is formed at a back side of the connection base, the injection pipe is inserted into the insertion hole, and a second sealing ring is disposed between the injection pipe and the insertion hole.

7. A scroll compressor comprising the scroll compressor refrigerant injection structure of claim 5 or 6.

8. A temperature adjusting apparatus, comprising an evaporator, a throttling element, a condenser and a scroll compressor as claimed in claim 7, wherein the scroll compressor, the condenser, the throttling element and the evaporator are connected by a refrigerant pipeline to form a working circuit, and an inlet end of the injection pipe is connected to the working circuit between the condenser and the throttling element.

9. Tempering device according to claim 8, characterized in that the ejector tube is provided with a capillary tube.

10. The thermostat apparatus of claim 8, wherein an oil separator is provided on the working circuit between the scroll compressor and the condenser, a subcooler and a dryer are provided on the working circuit between the condenser and the throttling element, and a gas-liquid separator is provided on the working circuit between the evaporator and the scroll compressor.