CN215256729U

CN215256729U - Effective volume adjusting device of compressor cylinder

Info

Publication number: CN215256729U
Application number: CN202120602918.9U
Authority: CN
Inventors: 张勤建; 武守飞; 周锐; 张兵; 许钧
Original assignee: Jiaxipera Compressor Co Ltd
Current assignee: Jiaxipera Compressor Co Ltd
Priority date: 2021-03-24
Filing date: 2021-03-24
Publication date: 2021-12-21
Anticipated expiration: 2031-03-24

Abstract

The utility model discloses an effective volume adjusting device of compressor cylinder locates on the cylinder, is equipped with the cylinder hole on the cylinder, and this little motor adjusting device of compressor displacement still includes rotary switch and micromotor, and little motor is fixed on the cylinder, and little motor output is connected with rotary switch, still is equipped with the discharge orifice on the cylinder, and rotary switch is located the cylinder and can cut the connected state between cylinder hole and discharge orifice. The utility model discloses a micromotor drives rotary switch and realizes the intercommunication of cylinder hole and discharge orifice and block, realizes the regulation of refrigerating output through the gaseous output quantity of control refrigerant, is different from the refrigerating output regulation mode of variable speed compressor, can not receive the restriction of compressor motor rotational speed low limit, but the lower refrigerating output of refrigerating output under the minimum rotational speed of exportable ratio variable speed compressor, consequently has bigger refrigerating output control range.

Description

Effective volume adjusting device of compressor cylinder

Technical Field

The utility model relates to a refrigeration compressor, more specifically say, it relates to an effective volume adjusting device of compressor cylinder.

Background

With the development of national economy, the living standard of people is gradually improved. Consumers have increasingly high requirements on energy conservation, moisture preservation, fresh keeping and the like of refrigerators and freezers. The compressor is used as a core component of a refrigerator and a freezer and is the key for improving the quality of various items of refrigeration appliances. As shown in fig. 1, inside the compressor, one of the main working parts of the cylinder. According to the technical characteristics of the refrigerating system, the refrigerating appliance has great difference on the refrigerating capacity of the compressor under different ambient temperatures. For example, the heat load of the refrigerator at the ring temperature of 16 ℃ is only about half of the heat load of the refrigerator at the ring temperature of 32 ℃, which is objectively required, and the compressor at the ring temperature of 16 ℃ provides smaller refrigerating output to ensure the efficient operation of the refrigerator system; meanwhile, the small refrigerating output of the compressor at the ring temperature of 16 ℃ can reduce the temperature fluctuation in the box caused by the overlarge refrigerating output of the compressor. Therefore, in order to meet the demand difference of the refrigerating capacity when the refrigerator operates at different ambient temperatures and ensure the efficient operation of the refrigerating system, the wide-refrigerating-capacity efficient compressor is an objective demand. At present, the variable-speed compressor in the industry can realize wide refrigerating output, and meet the high-efficiency refrigerating requirements of the refrigerating appliance at different ring temperatures to a greater extent. However, in recent years, with the increasing demand for efficiency of the refrigeration system, higher demand is put on the width range of the refrigerating capacity of the compressor, and it is particularly desirable that the variable-speed compressor can provide smaller refrigerating capacity output to meet the requirement of the high-efficiency operation of the refrigeration system at low ring temperature, so as to further reduce the power consumption of the refrigeration system at the low ring temperature. The existing variable-speed compressor adjusts the refrigerating output through the change of the rotating speed, and is limited by characteristics of a lubricating system, a vibration reduction system and the like, the lowest rotating speed is designed to be about 1000rpm, and the difficulty of further reducing the rotating speed is high. The output of the air cylinder displacement of the constant-speed compressor is constant, and when the constant-speed compressor is used in a refrigerating system, the average refrigerating capacity output within a period of time is controlled by adjusting the running time and the on-time rate of the constant-speed compressor, so that the refrigerating capacity requirements of the refrigerating system under different environment temperatures are met. However, the refrigeration capacity adjusting mode has slightly poor efficiency compared with a variable-speed compressor; and the refrigerating output of the compressor at low ring temperature is far larger than the refrigerating output requirement of the system, the running efficiency of the system is low, and the control precision of the temperature in the box is slightly poor. Therefore, it is necessary to design a compressor displacement adjusting device different from a variable rotation speed adjusting mode, which can realize that the refrigeration compressor generates different displacement and refrigeration capacity at the same rotation speed, so that the constant rotation speed compressor can realize variable refrigeration capacity output, and is a better auxiliary refrigeration capacity adjusting structure for the variable rotation speed compressor. The invention with the publication number of CN108317072A is specially beneficial to 2018, 7 and 24, and discloses a linear compressor with an adjustable cylinder volume, which comprises a shell, a stator, a piston and a cylinder, wherein the stator, the piston and the cylinder are arranged in the shell, the head of the piston is slidably arranged in the cylinder, and the cylinder is adjustably mounted on the stator along the axial direction of the cylinder. But this utility model discloses a compressor cylinder volumetric regulation only can go on when dispatching from the factory to can not go on when the user uses, therefore can not adjust the refrigerating output according to the refrigerating output demand difference when different ambient temperature moves down, reduces refrigerating system and synthesizes power consumption.

SUMMERY OF THE UTILITY MODEL

Among the prior art, under the low ring temperature condition, the refrigerating output of deciding the rotational speed compressor is surplus, and variable speed compressor then has the limit to lead to refrigerating output still big partially because of minimum rotational speed, for overcoming this defect, the utility model provides a can make same compressor can realize different air displacement and refrigerating output, and not restricted by compressor motor rotational speed, has bigger refrigerating output control range, the compressor cylinder effective volume adjusting device that energy saving and consumption reduction effect is better.

The technical scheme of the utility model is that: the utility model provides an effective volume adjusting device of compressor cylinder, locates on the cylinder, is equipped with the cylinder hole on the cylinder, and this effective volume adjusting device of compressor cylinder still includes rotary switch and micromotor, and the micromotor is fixed on the cylinder, and the micromotor output is connected with rotary switch, still is equipped with the discharge orifice on the cylinder, and rotary switch is located the intercommunication air flue of cylinder hole and discharge orifice and cuts the connected state between cylinder hole and discharge orifice. The rotary switch can connect the cylinder hole and the drain hole or block the communication between the cylinder hole and the drain hole, so that the compressor has two working modes of full-power working and non-full-power working. As the cylinder hole and the discharge hole can be communicated, a leakage point is artificially arranged in the cylinder hole. In a normal state, the cylinder hole and the discharge hole are not communicated with each other, the compressor is in a full-power working mode, and refrigerant gas entering the cylinder hole is compressed by a piston in the cylinder hole, then is completely output and enters a refrigeration pipeline; if the ambient temperature is lower, the micro motor is started to drive the rotary switch to move, and the rotary switch is connected with the cylinder hole and the drain hole, so that the compressor is in a non-full-power working mode. The compressor in the full power working mode is not different from the common compressor. When the cylinder enters a non-full-power working mode, a part of refrigerant gas entering the cylinder hole enters the drain hole to be discharged in the process of being compressed by the piston, which is equivalent to that the cylinder hole is not a whole cavity capable of implementing gas compression, and in the cylinder hole with a leakage point, only the part from the leakage point to the bottom of the cylinder hole is a closed cavity capable of implementing gas compression, namely the effective volume of the cylinder. Because the refrigerant leaks and runs off midway, the refrigerant gas finally participating in compression and output is less than the refrigerant input quantity initially entering the cylinder hole, and the refrigerating capacity of the refrigerating system mainly depends on the refrigerant output quantity of the compressor, namely the air displacement, so that after the compressor in the non-full-power working mode passes through one working cycle, the refrigerating capacity is less than that of the compressor in the full-power working mode in a normal state. For a variable-speed compressor, the effective volume adjusting device of the compressor cylinder can generate and output refrigerating capacity lower than the minimum refrigerating capacity at the lowest speed; for a compressor with a fixed rotating speed, the effective volume adjusting device of the compressor cylinder can realize the conversion of two working modes after being adopted, obtain the displacement and the refrigerating output of the compressor with different grades, better meet the refrigerating output requirements under different working conditions and produce better energy-saving and consumption-reducing effects.

Preferably, the rotary switch is rotatably connected to the cylinder, an axial hole is formed in the rotary switch, a radial hole is formed in the circumferential surface of the rotary switch, and the radial hole is communicated with the axial hole. The rotary switch with the structure has a communication function, when the air cylinder is designed and processed, the air cylinder hole and the discharge hole are connected through an air circuit, the rotary switch is arranged on a communication air circuit node between the air cylinder hole and the discharge hole, and when the rotary switch is driven by a micro motor to rotate, the radial hole and the axial hole are respectively aligned with the air cylinder hole and the discharge hole, so that the communication between the air cylinder hole and the discharge hole can be realized; on the contrary, when the radial hole and the axial hole are staggered with the cylinder hole and the drain hole, the communication between the cylinder hole and the drain hole is blocked. Therefore, when the rotary switch rotates to different positions, different compressor working modes can be selected to obtain different air displacement.

Preferably, the cylinder is provided with a circular groove with an opening on the side surface of the cylinder, the circular groove is communicated with a cylinder hole, the rotary switch is embedded into the circular groove in a matching manner, the drainage hole is intersected with the axis of the circular groove, the axial hole is communicated with the cylinder hole, the inlet of the drainage hole is positioned on the inner wall of the circular groove, and the rotary switch is driven by the micromotor to switch between an overlapped state and a staggered state between a radial hole and the inlet of the drainage hole. The circular groove is used for placing the rotary switch to realize the rotary connection of the rotary switch on the cylinder, and simultaneously, the cavity of the circular groove forms a connecting air path between the discharge hole and the air cylinder hole, the rotary switch rotates in the circular groove under the driving of the micro motor, when the radial hole is overlapped with the inlet of the discharge hole, the discharge hole is communicated with the cylinder hole through the radial hole and the axial hole, at the moment, the compressor enters a non-full-power working mode, when the piston of the cylinder compresses refrigerant gas, before the piston crosses the position corresponding to the circular groove, part of refrigerant gas is extruded into the rotary switch, enters the discharge hole through the radial hole and is finally discharged, the quantity of refrigerant gas which is compressed and output in the piston and the closed end of the cylinder hole is less than that of the refrigerant gas sucked into the cylinder hole initially, and the refrigerant gas between the piston and the closed end of the cylinder hole is not reduced after the piston passes over the position corresponding to the circular groove; when the inlets of the radial hole and the discharge hole are staggered, the air path between the discharge hole and the cylinder hole is blocked by the rotary switch, and at the moment, the compressor enters a full-power working mode, refrigerant gas sucked into the cylinder hole is not lost, and the refrigerant gas completely participates in compression and output.

Preferably, the depth of the circular groove is smaller than the distance from the side surface of the cylinder to the cylinder hole, the inner end of the circular groove is provided with a vent hole with the diameter smaller than that of the circular groove, and the vent hole is communicated with the circular groove and the cylinder hole. The diameter difference exists between the circular groove and the vent hole, so that the circular groove is not directly communicated with the cylinder hole, the inner end of the circular groove can still form axial positioning for the rotary switch, and the reliable connection between the rotary switch and the micro motor is ensured.

Preferably, the vent holes are straight holes. The resistance of the straight hole is small, so that refrigerant gas can smoothly enter and leak through the vent hole.

Preferably, the rotary switch is connected with the output end of the micromotor in a key mode. The key connection mode has simple structure and high transmission efficiency.

Alternatively, the rotary switch is riveted to the micromotor output. The riveting mode has simple structure and reliable connection.

The utility model has the advantages that:

the refrigerating output adjusting range is wider. The utility model discloses a micromotor drives rotary switch and realizes the intercommunication of cylinder hole and discharge orifice and block, realizes the regulation of refrigerating output through the gaseous output quantity of control refrigerant, is different from the refrigerating output regulation mode of variable speed compressor, can not receive the restriction of compressor motor rotational speed low limit, but the lower refrigerating output of refrigerating output under the minimum rotational speed of exportable ratio variable speed compressor, consequently has bigger refrigerating output control range.

Better adapt to different working conditions and have better energy-saving and consumption-reducing effects. The utility model discloses a micromotor is to rotary switch's control, can realize the conversion of two kinds of mode, obtains the compressor displacement and the refrigerating output of different grades, satisfies the refrigerating output demand under the different operating modes better, produces better energy saving and consumption reduction effect.

Drawings

Fig. 1 is a schematic view of a disassembled structure of the present invention;

fig. 2 is a schematic structural diagram of a rotary switch according to the present invention;

fig. 3 is a side view of the present invention;

fig. 4 is a top view of the present invention;

FIG. 5 is a schematic view of a partial structure of the vent hole of the present invention communicating with the cylinder bore;

fig. 6 is a schematic view of a local structure of the middle drain hole when it is blocked by the cylinder hole.

In the figure, 1-cylinder, 1 a-vent hole, 1 b-circular groove, 1 c-discharge hole, 1 d-cylinder hole, 2-rotary switch, 2 a-axial hole, 2 b-radial hole, 3-micromotor and 4-crankcase.

Detailed Description

The present invention will be further described with reference to the following detailed description of the embodiments.

Example 1:

as shown in fig. 1 to 6, a micro-motor adjusting device for the displacement of a compressor is arranged on a cylinder 1, the cylinder 1 is installed on a crankcase 4, the cylinder 1 and the crankcase 4 are integrally arranged in a closed shell, a cylinder hole 1d is arranged on the cylinder 1, and a crankshaft on the crankcase 4 drives a piston to reciprocate in the cylinder hole 1d through a connecting rod to compress refrigerant gas. The micromotor adjusting device for the air displacement of the compressor further comprises a rotary switch 2 and a micromotor 3, wherein the micromotor 3 is fixed on the cylinder 1, and a rotating shaft at the output end of the micromotor 3 is connected with the rotary switch 2 through a key. The cylinder 1 is provided with a circular groove 1b opened on the side surface of the cylinder 1, the depth of the circular groove 1b is smaller than the distance from the side surface of the cylinder 1 to a cylinder hole 1d, the inner end of the circular groove 1b is provided with a vent hole 1a which is coaxial with the circular groove 1b and an axial hole 2a and has a diameter smaller than that of the circular groove 1b, the vent hole 1a is communicated with the circular groove 1b and the cylinder hole 1d, and the vent hole 1a is a straight hole. The rotary switch 2 is cylindrical and is embedded into the circular groove 1b in a matching manner, an axial hole 2a with one open end is arranged in the rotary switch 2, the axial hole 2a is always connected with a cylinder hole 1d, a radial hole 2b is further arranged on the circumferential surface of the rotary switch 2, and the radial hole 2b is communicated with the axial hole 2 a. The cylinder 1 is also provided with a discharge hole 1c, the discharge hole 1c is vertically intersected with the circular groove 1b, the axis of the discharge hole 1c is parallel to the axis of the cylinder hole 1d, the inlet of the discharge hole 1c is positioned on the inner wall of the circular groove 1b, the outlet of the discharge hole 1c and the inlet of the cylinder hole 1d are positioned at the same end of the cylinder 1 and are positioned on one surface facing the piston driving shaft. The micromotor 3 is electrically connected with a controller, and the input end of the controller is connected with an annular temperature sensor for monitoring the external environment temperature of the refrigeration equipment. The rotary switch 2 is driven by the micromotor 3, and the inlets of the radial holes 2b and the drain holes 1c can be switched between an overlapped state and a staggered state.

The effective volume adjusting device of the compressor cylinder is applied to a refrigerator, and the rotary switch 2 is in a closed state under a normal state, namely, the communication between the cylinder hole 1d and the drain hole 1c is blocked, namely, the default working mode of the compressor is a full-power working mode.

When the compressor cylinder effective volume adjusting device works, firstly, a refrigeration equipment designer sets a mode conversion trigger temperature as required through a main control program on a refrigerator, the mode conversion trigger temperature is 16 ℃, when the compressor works at the ring temperature of 16 ℃ or below, the controller outputs a working signal, starts the micro motor 3, drives the rotary switch 2 to rotate until the radial hole 2b is overlapped with the inlet of the drain hole 1c, the compressor enters a non-full power working mode, when a piston of the cylinder 1 compresses refrigerant gas, part of the refrigerant gas is extruded into the axial hole 2a of the rotary switch 2 when the piston crosses the position corresponding to the circular groove 1b, particularly before crossing the vent hole 1a, then enters the drain hole 1c through the radial hole 2b and finally is discharged into the shell, so that the amount of the refrigerant gas involved in the closed end of the piston and the cylinder hole 1d and compressed and output is less than the amount of the gas initially sucked into the cylinder hole 1d, only after the piston passes over the position corresponding to the circular groove 1b, specifically the vent hole 1a, the refrigerant gas between the piston and the closed end of the cylinder hole 1d is not reduced any more; when the compressor works at the temperature of above 16 ℃, the micro motor 3 does not act, the state that the radial hole 2b of the rotary switch 2 is staggered with the inlet of the drain hole 1c is maintained, at the moment, the air path between the drain hole 1c and the cylinder hole 1d is blocked by the rotary switch, the compressor is in a full-power working mode, and refrigerant gas sucked into the cylinder hole 1d is not lost and completely participates in the output of the compressor.

Example 2:

the rotary switch 2 is riveted with the output end of the micro motor 3. The mode transition trigger temperature was 18 ℃. The rest is the same as example 1.

Claims

1. The utility model provides an effective volume adjusting device of compressor cylinder, locate on cylinder (1), be equipped with cylinder hole (1 d) on cylinder (1), a serial communication port, still include rotary switch (2) and micromotor (3), micromotor (3) are fixed on cylinder (1), micromotor (3) output is connected with rotary switch (2), still be equipped with discharge orifice (1 c) on cylinder (1), rotary switch (2) are located cylinder (1) and can switch the intercommunication state between cylinder hole (1 d) and discharge orifice (1 c).

2. The device for adjusting the effective cylinder volume of a compressor as claimed in claim 1, wherein the rotary switch (2) is rotatably connected to the cylinder (1), an axial hole (2 a) is formed in the rotary switch (2), radial holes (2 b) are formed in the circumferential surface of the rotary switch (2), and the radial holes (2 b) are communicated with the axial hole (2 a).

3. The device for adjusting the effective cylinder volume of the compressor as claimed in claim 2, wherein the cylinder (1) is provided with a circular groove (1 b) which is opened on the side surface of the cylinder (1), the circular groove (1 b) is communicated with a cylinder hole (1 d), the rotary switch (2) is adapted to be embedded in the circular groove (1 b), the drain hole (1 c) is intersected with the axis of the circular groove (1 b), the axial hole (2 a) is communicated with the cylinder hole (1 d), the inlet of the drain hole (1 c) is positioned on the inner wall of the circular groove (1 b), and the rotary switch (2) is driven by the micromotor (3), and the inlet of the radial hole (2 b) and the inlet of the drain hole (1 c) are switched between an overlapping state and a dislocation state.

4. The compressor cylinder effective volume adjusting device according to claim 3, wherein the depth of the circular groove (1 b) is smaller than the distance from the side surface of the cylinder (1) to the cylinder bore (1 d), the inner end of the circular groove (1 b) is provided with a vent hole (1 a) having a smaller diameter than the circular groove (1 b), and the vent hole (1 a) communicates the circular groove (1 b) and the cylinder bore (1 d).

5. The compressor cylinder effective volume adjusting device according to claim 4, wherein the vent hole (1 a) is a straight hole.

6. The compressor cylinder effective volume adjusting device according to any one of claims 1 to 5, characterized in that the rotary switch (2) is keyed to the output terminal of the micromotor (3).

7. The compressor cylinder effective volume adjusting device according to any one of claims 1 to 5, characterized in that the rotary switch (2) is riveted with the output of the micromotor (3).