CN112145399A

CN112145399A - Compressor and refrigeration equipment

Info

Publication number: CN112145399A
Application number: CN201910578786.8A
Authority: CN
Inventors: 朱万朋; 宋斌; 韩聪; 高山; 吴远刚
Original assignee: Qingdao Haier Smart Technology R&D Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Smart Technology R&D Co Ltd; Haier Smart Home Co Ltd
Priority date: 2019-06-28
Filing date: 2019-06-28
Publication date: 2020-12-29
Anticipated expiration: 2039-06-28
Also published as: CN112145399B

Abstract

The application relates to a compressor and refrigeration equipment. The compressor includes: the compression assembly is configured to controllably reciprocate along the axial direction of the cylinder so as to suck and compress working media in the cylinder; and the displacement detection assembly comprises more than one photoelectric module which is arranged close to the compression assembly and sequentially arranged along the axial direction, and the photoelectric modules are configured to trigger generation and output of photoelectric signals when the compression assembly moves to the corresponding position along the axial direction. In the embodiment of the disclosure, the displacement detection assembly composed of the photoelectric module is arranged in the compressor, and the photoelectric trigger module can be used for triggering and generating a corresponding photoelectric signal in the running process of the compressor, so that refrigeration equipment and the like can control the compressor according to the photoelectric signal; compared with the mode of controlling the compressor according to the electrical parameters such as working current and voltage in the related art, the method and the device can effectively improve the control precision of the operation of the compressor.

Description

Compressor and refrigeration equipment

Technical Field

The present application relates to the field of compression devices, and for example, to a compressor and a refrigeration apparatus.

Background

The compressor is a core power part of common refrigeration equipment such as a refrigerator, an air conditioner and the like at present, and can compress working media such as refrigerants and the like into a high-temperature and high-pressure state through reciprocating compression motion of the piston in the cylinder so as to meet the heat exchange requirement of the refrigeration equipment; here, the actual compression stroke of the piston or mover thereof during the operation of the compressor can directly affect the compression performance of the compressor. Therefore, in order to improve the control accuracy of the compressor in the related art, the compression stroke of the compressor is generally calculated according to the value of the detected electrical parameter (such as the operating current or voltage of the compressor).

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

because of the change of factors such as the internal temperature in the running process of the compressor, the detected electric parameters can fluctuate, meanwhile, the current theoretical model for calculating the stroke based on the electric parameters has the condition of unreasonableness and accuracy, and all the problems are easy to cause the calculation of the compression stroke to generate deviation, thereby reducing the control precision of the compressor; therefore, the related art adopts the above-mentioned type of electrical parameters to perform the precision control of the compressor, which has disadvantages and is difficult to meet the precision control requirement of the compressor.

Disclosure of Invention

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.

The embodiment of the disclosure provides a compressor and refrigeration equipment, and aims to solve the technical problem that errors easily exist in a mode of controlling the compressor according to electrical parameters such as working current and voltage in the related art.

In some embodiments, the compressor comprises:

the compression assembly is configured to controllably reciprocate along the axial direction of the cylinder so as to suck and compress working media in the cylinder;

and the displacement detection assembly comprises more than one photoelectric module which is arranged close to the compression assembly and sequentially arranged along the axial direction, and the photoelectric modules are configured to trigger generation and output of photoelectric signals when the compression assembly moves to the corresponding position along the axial direction.

In some embodiments, the refrigeration appliance comprises the compressor of the above embodiments; and

a first control module electrically connected to the displacement detection assembly and configured to:

determining a stroke parameter of the compression assembly according to the photoelectric signal output by the photoelectric module;

and controlling the operation of the compressor according to the stroke parameter.

The compressor and the refrigeration equipment provided by the embodiment of the disclosure can realize the following technical effects:

in the embodiment of the disclosure, the displacement detection assembly composed of the photoelectric module is arranged in the compressor, and the photoelectric trigger module can be used for triggering and generating a corresponding photoelectric signal in the running process of the compressor, so that refrigeration equipment and the like can control the compressor according to the photoelectric signal; compared with the mode of controlling the compressor according to the electrical parameters such as working current and voltage in the related art, the method and the device can effectively improve the control precision of the operation of the compressor.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:

fig. 1 is a schematic cross-sectional view of a compressor according to an embodiment of the present disclosure;

FIG. 2 is a schematic view of the relative positions of the detection shaft and the reflector in an idle state according to an embodiment of the disclosure;

FIG. 3 is a schematic view of the relative positions of the sensing shaft and the reflector in an operational state corresponding to FIG. 2;

FIG. 4 is a schematic view of the relative positions of the detection shaft and the reflector in a shutdown state according to yet another embodiment of the disclosure;

FIG. 5 is a schematic view of the structure of the view in the direction A of FIG. 1;

FIG. 6 is a schematic structural diagram of a control device provided in an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of a refrigeration device provided by the embodiment of the disclosure.

Reference numerals:

in fig. 1 to 5: 10. an outer housing; 11. an outer cover of the cylinder; 21. a mover; 22. a stator member; 31. a first mover spring; 32. a second mover spring; 41. a spring baffle; 42. a stator pressing plate; 51. a cylinder; 52. an exhaust valve plate; 61. a piston rod; 62. a piston head; 71. a photovoltaic module; 72. detecting a shaft lever; 80. a reflector;

in fig. 6: 600. a control device; 610. a journey parameter determination module; 620. operating the control module;

in fig. 7: 700. a refrigeration device; 710. a compressor; 711. a photovoltaic module; 720. and a control device.

Detailed Description

So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.

Fig. 1 is a schematic cross-sectional structure diagram of a compressor provided in an embodiment of the present disclosure.

As shown in fig. 1, the present embodiment provides a compressor including an outer shell 1, a cylinder 51, and a compression assembly.

Wherein the outer case 1 defines an inner space for accommodating a compression assembly, the compression assembly and the cylinder 51 being disposed in the inner space of the outer case 1; a compression space for accommodating working medium is formed inside the cylinder 51; the compression assembly is configured to controllably reciprocate in the axial direction of the cylinder 51 to perform suction and compression operations on the working fluid in the cylinder 51.

In an alternative embodiment, the compressor further comprises a cylinder cover 11, the cylinder cover 11 defining an inner space in which the cylinder 51 and the compression assembly can be housed. Here, the cylinder head 11 is a rigid structure made of a material having a high strength so as to be able to withstand an impact force of high-pressure gas compressed during the reciprocating motion of the compression assembly, a vibration force of other components, and the like.

The cylinder outer cover 11 is a semi-closed structure, and is provided with ports for installing or connecting an oil pipeline, an exhaust pipeline, an air inlet pipeline and the like.

Optionally, the cylinder outer cover 11 includes a middle cover body and end covers mounted at one or both longitudinal ends of the middle cover body; here, the longitudinal direction of the middle cover body is parallel to the axial direction of the cylinder 51.

The split structure may facilitate the installation of other components of the compressor in the inner space of the cylinder head 11 or the removal of the components from the inner space.

In an alternative embodiment, the cylinder 51 is formed with a compression space therein for receiving the working medium and for the piston assembly to move, and the piston assembly of the compression assembly compresses the working medium in the compression space.

An exhaust valve plate 52 is provided at an outer end of the cylinder 51, and the compressed working medium can be discharged out of the cylinder 51 through the exhaust valve plate 52.

In an alternative embodiment, the main components of the compression assembly include a drive assembly, a resilient member, a piston assembly, and the like.

Here, the driving assembly mainly includes a moving member 21, a stator member 22, and the like, and is used to drive the piston assembly to reciprocate in the cylinder 51.

The stator part 22 is electrically connected with a power supply circuit of the compressor, and the stator part is used for generating electromagnetic acting force by using a coil and the like and driving the rotor part 21 to move through the electromagnetic acting force; here, the moving part 21 is connected with the piston rod 61 of the piston assembly, so that the piston rod 61 can be synchronously driven to move in the moving process of the moving part 21; in the embodiment of the present disclosure, by periodically changing the direction of the electromagnetic force, the driver component 21 can be driven to move between two opposite directions, so that the purpose of driving the piston assembly to reciprocate can be achieved by this way.

In the embodiment, the moving element 21 is driven by electromagnetic force to reciprocate along a linear direction parallel to the axis of the cylinder 51, so that the piston rod 61 driven by the moving element can reciprocate inside the cylinder 51 to suck and compress the working medium to be compressed in the cylinder 51.

In an alternative embodiment, the elastic member includes a first mover spring 31 and a second mover spring 32.

The first movable spring 31 is disposed between the movable member 21 and the spring retainer 41 adjacent thereto, and both ends of the first movable spring 31 are elastically connected to the movable member 21 and the spring retainer 41, respectively, where the first movable spring 31 can be used to provide an elastic force to buffer when the movable member 21 moves toward the spring retainer 41, so as to prevent the movable member 21 and the spring retainer 41 from colliding with each other.

Here, the spring retainer 41 is disposed perpendicular to the axial direction of the cylinder 51, so that the spring retainer 41 and the first mover spring 31 can contact with a maximum force-receiving area during the expansion and contraction of the first mover spring 31 in the axial direction of the cylinder 51, which is beneficial to the dispersion of the elastic pressure.

The second mover spring 32 is disposed between the stator member 22 and the mover member 21, the stator member 22 has a stator pressing plate 42 disposed perpendicular to the axial direction of the cylinder 51, and two elastic ends of the second mover spring 32 are respectively elastically connected to the stator pressing plate 42 and the mover member 21, where the second mover spring 32 can be used to provide an elastic force for buffering when the mover member 21 moves towards the stator member 22, so as to avoid the collision between the two members.

Here, each of the first and second mover springs 31 and 32 is plural and is disposed along a circumferential line having an axis of the first cylinder 51 as a center; the first and second mover springs 31 and 32 are positioned in one-to-one correspondence. This kind of arrangement is favorable to guaranteeing the balanced atress between active component 21, stator 22 and the cylinder enclosing cover 11, prevents to be in the active component 21 in the middle because of the uneven problem that the slope appears of atress.

In an alternative embodiment, the piston assembly comprises a piston rod 61 and a piston head 62.

Wherein, the piston rod 61 is a rod-shaped structure and is arranged along the axial direction of the cylinder 51; the head end of the piston rod 61 is used for mounting the piston head 62, and the tail end is used for connecting with the moving part 21, so that the piston rod 61 drives the piston head 62 to reciprocate in the cylinder 51 under the driving of the moving part 21.

In an optional embodiment, in order to better control the operation of the compressor, the compressor of the present application further includes a displacement detection assembly, where the displacement detection assembly includes more than one optoelectronic module 71 disposed adjacent to the compression assembly and sequentially arranged along the axial direction, and the optoelectronic modules 71 are configured to trigger generation and output of an optoelectronic signal when the compression assembly moves to its corresponding position along the axial direction.

In the embodiment of the disclosure, the displacement detection assembly composed of the photoelectric module 71 is arranged in the compressor, and the photoelectric trigger module can be used for triggering and generating a corresponding photoelectric signal in the running process of the compressor, so that devices such as refrigeration equipment and test equipment can control and test the compressor according to the photoelectric signal; compared with the mode of controlling the compressor according to the electrical parameters such as working current and voltage in the related art, the method and the device can effectively improve the control precision of the operation of the compressor.

Optionally, the displacement detecting assembly further comprises a detecting shaft 72, wherein the detecting shaft 72 is a rod-shaped structure, and is formed along an axial direction parallel to the cylinder 51; one end of the detection shaft 72 is fixed to the spring retainer 41, and the other end is a free end that passes through the mover 21 and faces the cylinder 51.

Each detection shaft 72 is provided with a group of photoelectric modules 71, and each group of photoelectric modules 71 comprises more than one photoelectric modules 71 which are sequentially arranged along the axial direction of the detection shaft 72. The more than one photoelectric modules 71 can be respectively connected to external devices through data lines so as to output photoelectric signals generated by triggering the photoelectric modules. Here, the detection shaft 72 is internally defined with a routing channel in which the data line is disposed.

Here, each set of the optoelectronic modules disposed on each of the detecting shafts 72 includes a reference optoelectronic module and a first optoelectronic module, wherein the reference optoelectronic module is disposed at an interval from the free end of the detecting shaft 72; the first photoelectric module comprises one or more photoelectric modules which are sequentially arranged between the reference photoelectric module and the free end, and the first photoelectric module comprises a tail photoelectric module which is arranged at the free end.

For example, 10 photoelectric modules 71 are arranged on one detection shaft 72 shown in fig. 2, wherein the number 9 of the last photoelectric module arranged at the rightmost free end is the number 8, 7, … …, 1, 0 (reference photoelectric module) in sequence; here, the photoelectric modules 71 numbered 1 to 9 are arranged at equal intervals, and the interval between the number 0 and the number 1 is larger than the interval between the photoelectric modules 71 numbered 1 to 9, because: the application has higher precision requirement on the stroke control of the compressor piston, generally between 0.02 mm and 0.2mm, so the embodiment of the disclosure sets the photoelectric module in an effective test range, mainly uses the distance between the photoelectric modules corresponding to the numbers 1 to 9 as the test range, and can be used for calculating parameters such as the position of a piston head, the retreating amount and the like of a compression assembly in a compression process or a compression return stroke and judging the compression state of the compressor.

Here, the pitch between the photoelectric modules numbered 1 to 9 is 0.1 mm.

In some alternative embodiments, each set of optoelectronic modules disposed on each of the detection shafts 72 further includes a second optoelectronic module, which includes one or more optoelectronic modules sequentially arranged from the reference optoelectronic module back to the free end.

For example, a reference optoelectronic module, a first optoelectronic module and a second optoelectronic module are respectively disposed on one detection shaft 72 shown in fig. 4, wherein the manner of disposing the first optoelectronic module is the same as that of the previous embodiment, and is not described herein again; as for the plurality of photoelectric modules of the second photoelectric module, starting from the reference photoelectric module, the numbers of the photoelectric modules are 0 (reference photoelectric module), 1 ', 2', … …, 17 ', 18' (the number of the middle photoelectric module is not shown), and the photoelectric modules 71 numbered 1 'to 18' are arranged at equal intervals; here, the pitch between the photovoltaic modules numbered 1 'to 18' is 0.1 mm.

In an embodiment, a distance S between the number 0 and the optoelectronic module with the number 1' in the second optoelectronic module is equal to a distance S between the number 0 and the last optoelectronic module with the number 9 in the first optoelectronic module; in this embodiment, the second optoelectronic module can be used to calculate parameters such as the retraction amount of the piston head when the compression element is under an over-compression state.

In the embodiment of the disclosure, the movable part 21 and the piston assembly move synchronously, and the stroke displacement distances of the movable part 21 and the piston assembly are the same, in the application, the photoelectric module 71 detects the real-time moving position of the movable part 21 to trigger a corresponding photoelectric signal, so that information such as the stroke of the piston assembly can be acquired; therefore, the detection shaft 72 may be disposed at one side of the mover 21.

Optionally, the distance between the reference photoelectric module and the last photoelectric module in the more than one photoelectric modules 71 on the detection shaft 72 is equal to the distance between the forward stop position and the equilibrium position of the shutdown state in the reciprocating movement of the compression assembly;

here, the movement of the mover 21 corresponds to a simple harmonic movement of the mover spring, and there are three main positions of the movement states: a forward dead center position, a reverse dead center position and a middle balance position; for the linear compressor model, the position of a forward dead center and the balance position of a shutdown state (under the condition that the backward movement amount does not occur under the pressure of a working medium) are determined; however, due to the influence of factors such as a difference in the retreat amount caused by different working medium pressures, after the movable member 21 drives the piston assembly to start moving, uncertainty exists in the equilibrium position and the retreat stop position in the working state, and therefore, it is considered that the distance between the reference photoelectric module and the last photoelectric module is set as the distance between the advance stop position and the equilibrium position in the shutdown state.

Here, the process of the mover driving the piston assembly to move towards the direction of the forward dead center position is defined as a compression process in a compression period; the process that the movable element drives the piston assembly to move towards the direction of the backward stopping point is defined as the compression return stroke in the compression period; one compression cycle comprises a compression process and a compression backhaul which are continuous in process.

The forward dead center position is the maximum forward position which can be reached by forward movement of the piston assembly towards the direction of the exhaust valve plate 52 when the piston assembly compresses the working medium, and the backward dead center position is the maximum backward position which can be reached by backward movement of the piston assembly back to the direction of the exhaust valve plate 52 after the piston assembly compresses the working medium; the equilibrium position is located at a central position between the maximum forward position and the maximum backward position; in the embodiment of the present disclosure, when the distance between the reference photoelectric module and the last photoelectric module in the one or more photoelectric modules 71 on the detection shaft 72 is equal to the distance between the forward stop position and the equilibrium position in the stopped state in the reciprocating movement of the compression assembly, the photoelectric module 71 can cover the movement range to the half-way (from the equilibrium position to the forward stop position) of the reciprocating movement of the mover 21, and the parameters such as the stroke and the backward movement amount of the piston assembly can be determined based on the photoelectric signal triggered in the movement range.

Here, when the mover 21 starts to drive the piston assembly to reciprocate, the pressure change in the cylinder 51 breaks the equilibrium state formed between the mover 21 and the mover spring in the stopped state, so that the mover 21 drives the piston assembly to retreat by a certain distance, which is the retreat amount, first, and the position reached by the retreat is the equilibrium position in the operating state.

Thus, the free end of the detection shaft 72 extends at least to the position where the photoelectric sensor can be triggered by the follower 21 to generate a photoelectric signal when the piston head 62 reaches the forward dead center position in the cylinder 51.

Here, the number of the detection shafts 72 provided for the same compressor may be one; alternatively, the number of the detecting shafts 72 provided in the same compressor may be more than one, such as 2, 4, etc., and the more than one detecting shafts 72 may be provided to not only trigger and detect the stroke of the compressor, but also detect the perpendicularity of the rotor 21 of the compressor, and so on.

The positions of the photoelectric sensors on more than one detection shaft 72 are arranged in a one-to-one correspondence manner. For example, for a compressor provided with two detection shafts 72, the positions of the optoelectronic modules 71 numbered 0 to 9 on the two detection shafts 72 are correspondingly set, such as number 0 corresponding to number 0, number 1 corresponding to number 1, and so on; the connecting line between the two corresponding photoelectric modules with the same number is perpendicular to the axis of the cylinder 51, so that when the moving part 21 moves to a position corresponding to a certain number, the signals of the two photoelectric modules 71 with the same number can be simultaneously triggered, the triggering induction accuracy in the moving process of the moving part 21 is improved, and the problem that the detection cannot be triggered due to the problems that the photoelectric modules 71 on the individual detection shaft are failed and the like can be avoided.

Here, as shown in fig. 5, the axes of the one or more detection shafts 72 are located on the same circumferential line, and the center of the circumferential line is coaxial with the axis of the cylinder 51. Therefore, the vertical straight-line distance from the photoelectric module 71 on each detection shaft 72 to the axis of the cylinder 51 is equal, and the vertical straight-line distance from the photoelectric module 71 on each detection shaft to the moving part 21 is also equal; so as to ensure that the photoelectric sensors with the same number can receive the reflected light of the moving part 21 with the same light intensity, and avoid the problem that the photoelectric signal is not normally triggered due to the fact that the individual photoelectric modules 71 are too far away and the received reflected light is weak.

In the embodiment of the present disclosure illustrated in fig. 2, the optoelectronic module 71 is a reflective photosensor. In order to improve the triggering accuracy of the photoelectric signal of the photoelectric module 71, in the embodiment of the present disclosure, the displacement detecting assembly further includes a reflecting element 80, the reflecting element 80 is located on the moving element 21 (only the reflecting element 80 is shown in fig. 2, and the moving element 21 is omitted from illustration) and is disposed corresponding to the photoelectric sensor, and the reflecting element 80 is configured to reflect the emergent light emitted by the photoelectric module 71 back to the photoelectric module 71, so that the photoelectric module 71 triggers to generate the photoelectric signal.

The relative positions of the reflector 80 and the sensing shaft 72 are shown in fig. 2 when the compressor reaches an equilibrium state at shutdown. The number of the reflecting members 80 is two (reflecting member a and reflecting member b), and the two reflecting members 80 are arranged on the compressing assembly at intervals; the distance between the two reflectors 80 is the distance between the reference photoelectric module and the last photoelectric module in the more than one photoelectric module 71 on the detection shaft 72, and at this time, the light-sensitive sensors with the numbers 0 and 9 can be triggered to generate and output photoelectric signals; during the reciprocating movement of the reflector 80 and the follower sub-member 21, the corresponding optoelectronic module 71 can be triggered when the reflector moves to the corresponding position numbered 0 to 9.

Alternatively, for the layout structure of more than one detection shaft 72 located on the same circumference line in the foregoing, the reflection member 80 of the present application is designed as an annular structure, and the annular structure and the circumference line where the detection shaft 72 is located are concentric circles, so that the distances from the reflection member 80 to each detection shaft 72 are equal.

Fig. 6 is a schematic structural diagram of a control device provided in the embodiment of the present disclosure.

As shown in fig. 6, the embodiment of the present disclosure also provides a control device, which can apply control to the compressor shown in the above embodiments.

Here, the control device 600 includes:

a stroke parameter determination module 610 configured to determine a stroke parameter of the compression assembly according to the photoelectric trigger parameter output by the displacement detection assembly;

an operation control module 620 configured to control operation of the compressor according to the stroke parameter.

In the embodiment of the disclosure, the control device controls the compressor according to the photoelectric triggering parameter; compared with the mode of controlling the compressor according to the electrical parameters such as working current and voltage in the related art, the method and the device can effectively improve the control precision of the operation of the compressor.

Here, the photoelectric triggering parameter includes a triggering number or a triggering order of the photoelectric module to generate the photoelectric signal.

Thus, in an alternative embodiment, the trip parameter determination module 610 is configured to: acquiring the triggering times or the triggering sequence of the photoelectric module for generating the photoelectric signal in a single compression period; and determining the stroke parameters of the compression assembly according to the triggering times or the triggering sequence of the photoelectric module for generating the photoelectric signal.

After the moving element drives the piston assembly to start moving, the position of the piston head may occur in three ways: firstly, the piston head moves to a position exceeding the exhaust valve plate to form an abnormal state of over-compression; secondly, the piston head just moves to the position of a forward dead center, and the condition is the normal compression state of the compressor; thirdly, the piston head does not move to the forward dead center position, which is the most likely situation when the compressor is operating and can cause severe degradation of the performance of the compressor.

In an alternative embodiment, the stroke parameter determining module 610, for a stroke parameter of a compressor of the compressor, is configured to: after the compression process of a single compression period is completed, searching and obtaining the compression state of the corresponding compression assembly from the first association relation according to the triggering times of the photoelectric signal generated by the last photoelectric module; the first incidence relation comprises one or more than one corresponding relation between the triggering times and the compression state.

In the first association relationship, when the triggering frequency of the last photoelectric module for generating the photoelectric signal is 2 times, the compression state of the corresponding compression component is an under-compression state; when the triggering frequency of the last photoelectric module for generating the photoelectric signal is 3 times, the compression state of the corresponding compression assembly is a normal compression state; when the triggering times of the last photoelectric module for generating the photoelectric signal are 4 times, the compression state of the corresponding compression assembly is an over-compression state.

Fig. 3 shows a schematic view of the relative positions of the detection shaft and the reflection element in a certain operating state, where the mover in fig. 3 is retracted by a distance Xm compared to the relative positions of the two in the rest state in fig. 2; with reference to fig. 3, the following describes the detection and determination process of three position states, i.e., an over-compression state, a normal compression state, and a pre-compression state, respectively:

for the first case: in the process of moving from the balance position to the forward dead center position, the reflecting piece a sequentially triggers the photoelectric modules with the numbers of 0 to 9, the reflecting piece b sequentially triggers the photoelectric modules with the numbers of X to 9 corresponding to the positions of the backward movement, and if the backward movement is 0.2mm, the reflecting piece triggers the photoelectric modules with the numbers of 7 to 9; when the piston head is driven by the active component to retreat, the photoelectric modules with the numbers of 9 to 0 are sequentially triggered by the reflecting component a, the photoelectric modules with the numbers of 9 to 7 are sequentially triggered by the reflecting component b, and the photoelectric modules with the numbers of 9 trigger 4 photoelectric signals in the whole process; therefore, in this case, whether the compressor is in the over-compression state can be determined according to the number of the photoelectric signals generated by the number 9 triggered in the working process, for example, in one compression period, when the number of the photoelectric signals generated by the number 9 triggered by the photoelectric module is equal to 4 (that is, when the number of triggering times of the last photoelectric module is 4), the compressor is determined to be in the over-compression state.

Therefore, when the compressor is determined to be in the over-compression state, the operation of the compressor may be further controlled, for example, the compressor may be controlled by adjusting the duration of the input voltage, for example, the duration of the input voltage during the movement from the equilibrium position to the forward dead center position may be shortened, so as to reduce the stroke during the movement from the equilibrium position to the forward dead center position, thereby achieving the purpose of protecting the exhaust valve sheet.

In the second case: in the process from the balance position to the forward dead center position, the reflecting piece a sequentially triggers the photoelectric modules with the numbers from 0 to 9, and the reflecting piece b sequentially triggers the photoelectric modules with the numbers from X to 9 corresponding to the positions of the backward movement; when the mover part drives the piston head to retreat, the reflector part a leaves from the position corresponding to the photoelectric module with the number 9, the triggering of the photoelectric module with the number 9 in the advancing process is finished, the photoelectric modules with the numbers from 8 to 0 are sequentially triggered in the retreating process, the reflector part b sequentially triggers the photoelectric modules with the numbers from 9 to X, and the photoelectric modules with the numbers from 9 in the whole process are triggered to generate 3 photoelectric signals; therefore, in this case, whether the compressor is in the normal compression state can be determined according to the number of the photoelectric signals generated by the photoelectric module with the number 9 triggered in the working process, for example, in one compression period, when the number of the photoelectric signals generated by the photoelectric module with the number 9 triggered is equal to 3 (that is, when the number of triggering times of the last photoelectric module is 3 times), the compressor is determined to be in the normal compression state, and the current operation state is maintained; or, when the number of the photoelectric signals generated by triggering of the photoelectric module numbered 9 is not equal to 3, it is determined that the compressor is in an abnormal compression state, and the type of the abnormal state may be further determined according to the number of the photoelectric signals triggered by the number 9, for example, when the number of the photoelectric signals is 4 in the previous embodiment, the determined type of the abnormal state is in an over-compression state.

In the third case: in the process from the balance position to the forward dead center, the reflecting piece a can sequentially trigger photoelectric modules numbered from 0 to Y (1< Y <9, the position corresponding to the photoelectric module numbered with Y is the maximum forward position actually reached in the forward process), and the reflecting piece b can sequentially trigger the photoelectric modules numbered from X to 9 corresponding to the position of the backward amount; when the rotor part drives the piston head to retreat, the reflector part a leaves from the position corresponding to the photoelectric module numbered Y, the triggering of the photoelectric module numbered Y in the advancing process is finished, the photoelectric modules numbered Y-1 to 0 are sequentially triggered, the reflector part b sequentially triggers the photoelectric modules numbered 9 to X, and the photoelectric modules numbered 9 are triggered together to generate 2 photoelectric signals in the whole process; in this case, it can be determined whether the under-compressed state is achieved solely according to the number of the photo signals generated by the photo module numbered 9 triggered during the operation, for example, in a compression period, when the number of the photo signals generated by the photo module numbered 9 triggered is equal to 2 (i.e. when the number of triggering times of the last photo module is 2), it can be determined that the compression is the under-compressed state.

Therefore, when the compressor is determined to be in the low-pressure state, the operation of the compressor may be further controlled, for example, the compressor may be controlled by adjusting the duration of the input voltage, for example, increasing the duration of the input voltage in the process of moving from the equilibrium position to the forward dead center position may increase the stroke of the equilibrium position in the process of moving to the forward dead center position, so that the piston head may reach the set forward dead center position, and the compression performance of the compressor may be ensured.

Here, the stroke parameter to be adjusted can be determined by determining the corresponding position of the photoelectric module with the number Y, and the time compensation amount of the duration of the input voltage can be determined according to the stroke parameter; for example, when the number Y is 6, the corresponding time compensation amount is T1; when the number Y is 8, the corresponding time compensation amount is T2; the smaller the value of the number Y, the further the piston head is away from the forward dead center position, and therefore the larger the time compensation amount.

In an alternative embodiment, the stroke parameter includes a current stroke position of the piston head.

Accordingly, the trip parameter determination module 610 is configured to: determining a photoelectric module corresponding to the photoelectric signal of the last sequence based on the triggering sequence of the photoelectric modules for generating the photoelectric signals; according to the photoelectric module corresponding to the last-order photoelectric signal, searching the position corresponding to the photoelectric module from the second incidence relation, and taking the position as the current stroke position of the piston head;

the second association relationship is used for representing the corresponding relationship between each photoelectric module and a preset position.

After the movable element drives the piston head to move towards the direction of the forward dead center on the right side, the two reflecting elements follow the movable element towards the right side, and in the process, the reflecting element a triggers the photoelectric modules with the

numbers

0, 1, 2, … … and 9; here, when the reflection member triggers each photoelectric sensor, the corresponding position of the piston head may be determined in advance by means of measurement or the like, and a corresponding relationship between the number of the photoelectric sensor and the corresponding position of the piston head, that is, a second association relationship is established; therefore, after the photoelectric signal is acquired, the corresponding position of the piston head can be found from the second association relation according to the number of the photoelectric module generating the photoelectric signal, and the corresponding position can be used as the current stroke position of the piston head in the stroke parameter.

For example, the second association includes: the piston head position corresponding to the number 1 is S1, the piston head position corresponding to the number 2 is S2, … …, and the piston head position corresponding to the number 9 is S9;

when the optoelectronic module numbered 6 outputs the optoelectronic signal, the current stroke position of the piston head can be determined to be the S6 position according to the second correlation.

In yet another alternative embodiment, the stroke parameter includes a first amount of retraction of the piston head.

Accordingly, the trip parameter determination module 610 is configured to: in a compression return stroke of a single compression period, determining a photoelectric module with the minimum number for generating a photoelectric signal after a last photoelectric module triggers and generates a second photoelectric signal; the second photoelectric signal is a next photoelectric signal of the last photoelectric module which is triggered to generate the photoelectric signal for the first time; searching the positions of the corresponding last photoelectric module and the photoelectric module with the minimum number from the second incidence relation; and calculating the difference between the position distances of the last photoelectric module and the photoelectric module with the minimum number, and taking the difference as the first backward quantity of the piston head.

For example, for the retreating amount of the piston head when the compressor starts, the sub-element drives the piston head to retreat, in the process, the two reflecting elements move to the left along with the sub-element, at this time, the reflecting element a may sequentially trigger the optoelectronic modules according to the sequence of the number 9, the number 8 and the number … … until the sub-element stays at the position where the stress balance is achieved, and at this time, the distance between the position of the piston head and the forward dead center position is the retreating amount of the piston head. Therefore, after the photoelectric module with the number of 9 is triggered to generate the photoelectric signal, the photoelectric signal received subsequently is detected continuously, and the current stroke position of the piston head is determined according to the number W (1< W <9) of the photoelectric module corresponding to the last photoelectric signal.

Here, the manner of determining the current position of the piston head may also be determined by looking up the second correlation in the previous embodiment; thus, the distance between the number of the photoelectric module corresponding to the current position of the piston and the number 9 corresponding to the position of the forward dead center is the backward amount of the piston head; for example, if the number of the optoelectronic module corresponding to the last optoelectronic signal is 7 and the distance between two adjacent numbers is 0.1mm, the first retraction amount of the piston head can be calculated to be 0.2 mm.

In the embodiment of the disclosure, the compressor changes the direction of the electromagnetic force generated by the stator component by applying voltages in different directions, so as to change the moving direction of the stator component, for example, when a voltage in a first direction is applied, the rotor component drives the piston head to move from a back dead center position to a front dead center position, and when a voltage in a second direction is applied, the rotor component drives the piston head to move from the front dead center position to the back dead center position; here, the mover member moves the piston from the forward-stop position to the backward-stop position, and also causes the reflector a to sequentially trigger the optoelectronic modules in the order of number 9, number 8, and number … …, so in order to improve the detection accuracy, the step of determining the backward movement amount of the piston head in the above embodiment is performed without switching the voltage to the voltage in the second direction.

In an alternative embodiment, the stroke parameter includes a second amount of retraction of the piston head when the compressor is over-compressed, for a condition when the compressor is over-compressed.

A trip parameter determination module 610 configured to: in a compression return stroke of a single compression period, determining a photoelectric module with the maximum number for generating a photoelectric signal after a reference photoelectric module triggers generation of a second photoelectric signal; searching the positions of the photoelectric module with the maximum number corresponding to the reference photoelectric module from the second incidence relation; and calculating the difference between the position distances of the reference photoelectric module and the photoelectric module with the maximum number, and taking the difference as the second backward movement of the piston head when the compressor is in an over-compression state.

In the embodiment of the present disclosure, the photoelectric signal generated after the reference photoelectric module triggers to generate the second photoelectric signal is the photoelectric signal triggered to be generated by the photoelectric module of the second photoelectric module; the second photoelectric signal is the next photoelectric signal of the reference photoelectric module which is triggered to generate the photoelectric signal for the first time, in the compression return stroke of the single compression period, the photoelectric mode which is triggered to generate the reference photoelectric module for the first time is triggered by the reflector a, and the second photoelectric signal is triggered to generate when the reflector b moves to the position of the reference photoelectric module.

In addition, when the discharge pressure in the cylinder changes in the normal operation state of the compressor, the retraction amount of the piston head also changes, and the change in the equilibrium position in the operation state is concentrated, and there is a possibility that the retraction amount does not change, the retraction amount increases, or the retraction amount decreases.

For the condition that the retreating amount is increased, the movable element drives the piston head to retreat again from the balance position of the previous working state, namely the piston head possibly cannot reach the position of a forward dead center when moving forward next time, so that the problem of under-compression is caused; at this time, the reflector a can trigger the photoelectric module with the number 9 from the normal compression state to the photoelectric module with the number Z (1< Z <9) which can only trigger the photoelectric module with the number 9 at the left side of the sensor, and the increased retreating amount is the distance from the photoelectric module with the number Z to the number 9.

Therefore, in the process of backing, after the optoelectronic module numbered 9 is triggered to generate the optoelectronic signal, the subsequently received optoelectronic signal is continuously detected, and the distance between the optoelectronic module numbered 9 and the optoelectronic module numbered Z corresponding to the last optoelectronic signal (1< Z <9) is determined as the increased backing amount.

For the situation that the retreating amount is reduced, the movable element drives the piston head to move forwards from the balance position of the previous working state, namely the piston head can exceed the position of the exhaust valve plate during the next forward movement, so that the problem of over-compression is caused; at the moment, the number of photoelectric signals generated by the photoelectric module of the trigger number 9 of the reflection piece a in a normal compression state is changed from 1 to 2, and the piston head exceeds the exhaust valve by the reduced backward movement.

Thus, for a state in which the compressor is over-compressed, the stroke parameter may be applied to the displacement detection assembly shown in fig. 4 for determination; when the retreating amount of the piston head is reduced, the piston head is driven by the movable element to move forwards from the balance position of the previous working state, namely the piston head can exceed the position of the air release valve plate during the next forward movement, so that the problem of over-compression is caused; at this time, considering that the movement of the piston is symmetrical (in fig. 4, the position of the reference photoelectric module is the symmetrical center of the piston stroke), when the piston moves backwards towards the back dead point, the piston stops before the back dead point in the previous working state, that is, the back dead point is at a position corresponding to one of the photoelectric modules numbered from 1 'to 18', and a distance difference between a position corresponding to the last photoelectric module triggered by the reflecting member and a position corresponding to the last photoelectric module triggered by the reflecting member in the previous state is a reduced back-moving amount, that is, a distance that the piston head exceeds the exhaust valve.

Therefore, through the acquired stroke parameters in the embodiment, the refrigeration equipment can better adjust the running state of the compressor, so that the refrigeration equipment can meet the working requirement of the current working condition.

In yet another embodiment of the present disclosure, for compressors provided with more than one detection shaft, the stroke parameter further comprises the perpendicularity of the moving parts of the compression assembly.

Accordingly, the trip parameter determination module 610 is configured to: when the photoelectric module is triggered, acquiring the quantity of output photoelectric signals; and when the number of the photoelectric signals does not meet the set number condition, determining that the verticality of the movable component of the compression assembly is abnormal.

In an embodiment, the optoelectronic signal is an optoelectronic signal generated from one or more optoelectronic modules in the same corresponding position of one or more detection shafts; the set quantity condition comprises that the quantity of the photoelectric signals is equal to the quantity of the photoelectric modules at the same corresponding position.

For example, when the perpendicularity of the mover of the compressor has an abnormal problem, the mover is generally in a state of deflection, dislocation and the like, and the reflecting ring mounted on the mover also has a problem of deflection or dislocation, at which time, the central axis of the reflecting member of the annular structure does not coincide with the central axis of the circumferential line where the detection shaft is located; if the reflecting piece follow-up sub piece moves to the corresponding position of the photoelectric module with a certain number, if the photoelectric modules with the numbers on the two detection shaft rods are all triggered to generate photoelectric signals, the verticality of the moving sub piece is normal; and if only one photoelectric module with the number on the detection shaft lever triggers to generate a photoelectric signal, or 0 photoelectric module triggers to generate a photoelectric signal, the verticality of the moving part is abnormal.

Here, the number condition is set to be equal to the number of the photovoltaic modules at the same corresponding position; for example, a certain compressor is provided with 3 detection shaft rods, and the number and the positions of the photoelectric modules arranged on each detection shaft rod correspond to one another; the number of the photovoltaic modules in the number setting condition in this case is 3.

Therefore, through the judgment of the triggering number of the photoelectric sensors in the embodiment, the refrigeration equipment can find the abnormal operation state of the rotor part of the compressor in time, so that the compressor can be maintained as early as possible, and the stability and the service life of the operation of the compressor are effectively guaranteed.

As shown in fig. 7, the embodiment of the present disclosure further provides a refrigeration apparatus 700, which has a compressor 710 and a control device 720 as shown in the above embodiments, and the control device 720 is electrically connected to the one or more photovoltaic modules 711 in the compressor 710. The refrigeration equipment adopting the result can effectively improve the control precision of the operation of the compressor through the control device, and further improve the overall working performance of the refrigeration equipment.

It is to be understood that the present invention is not limited to the procedures and structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims

1. A compressor, comprising:

2. The compressor of claim 1, wherein the displacement sensing assembly further comprises:

one or more detection shafts, which are formed along the axial direction parallel to the cylinder; one end of the detection shaft lever facing the cylinder is a free end;

each detection shaft rod is provided with a group of photoelectric modules, and each group of photoelectric modules comprises more than one photoelectric module which are sequentially distributed along the axial direction of the detection shaft rod.

3. The compressor of claim 2, wherein each set of photovoltaic modules comprises:

the reference photoelectric module is arranged at intervals at the free end of the detection shaft lever;

the first photoelectric module comprises one or more photoelectric modules which are sequentially arranged between the reference photoelectric module and the free end.

4. The compressor of claim 3, wherein the first photovoltaic module comprises a last photovoltaic module disposed at the free end;

the distance between the reference photoelectric module and the last photoelectric module is equal to the distance between the position of a front dead center and the balance position of a shutdown state in the reciprocating movement of the compression assembly.

5. The compressor of claim 4,

the compression assembly comprises a stator piece, a moving piece and a spring baffle; the stator piece is provided with a stator pressing plate which is perpendicular to the axial direction of the cylinder; the rotor part is elastically connected with the spring baffle through a first rotor spring and is elastically connected with the stator pressing plate through a second rotor spring; the spring baffle is perpendicular to the axial direction of the cylinder;

one end of the detection shaft lever is connected with the spring baffle, and the other end of the detection shaft lever is the free end penetrating through the rotor.

6. The compressor of claim 5, wherein the displacement sensing assembly further comprises:

the reflection piece is located on the moving piece and corresponds the photoelectric sensor sets up, the reflection piece is set up to be with emergent light that the photovoltaic module sent reflects back the photovoltaic module, so that the photovoltaic module triggers and generates photoelectric signal.

7. The compressor of claim 6, wherein the number of the reflection members is two, and the two reflection members are spaced apart from each other on the compression assembly;

the distance between the two reflectors is the distance between a reference photoelectric module and a last photoelectric module in more than one photoelectric module on the detection shaft rod.

8. The compressor of any one of claims 3 to 7, wherein each set of photovoltaic modules further comprises:

and the second photoelectric module comprises one or more photoelectric modules which are sequentially arranged from the reference photoelectric module to the free end.

9. The compressor of claim 2, wherein the positions of the photoelectric sensors on the more than one detection shafts are arranged in a one-to-one correspondence.

10. The compressor of claim 2, wherein the axes of the one or more sensing shafts are located on a same circumferential line, the center of the circumferential line being coaxial with the axis of the cylinder.

11. A refrigeration appliance, characterized in that it comprises a compressor as claimed in any one of claims 1 to 10.