Sliding valve assembly and compressor for reducing compressor energy efficiency degradation problem

Abstract

The present invention provides a sliding valve assembly and a compressor for reducing the problem of energy efficiency degradation of a compressor. The sliding valve assembly includes a valve body and a partition, which are arranged in the air replenishment chamber, and the partition divides the air replenishment chamber into a relatively sealed first air replenishment chamber and a second air replenishment chamber. When the compressor is in a second load condition, the sliding valve assembly is in a second state in which the second air replenishment chamber replenishes air to the compressor. The sliding valve assembly and the compressor for reducing the problem of energy efficiency degradation of the compressor provided by the present invention are provided with a first air replenishment chamber and a second air replenishment chamber to replenish air to the compressor under different working conditions of the compressor, so that under the condition of ensuring that the compressor is normally replenished under the first load condition, the air replenishment can be used to overcome the problem of energy efficiency degradation of the compressor caused by bypass when the compressor is partially loaded, thereby effectively improving the energy efficiency of the compressor under the second load condition.

Description

Technical Field

[0001] The invention relates to the technical field of compression equipment, and in particular to a slide valve assembly and a compressor that reduce the problem of energy efficiency attenuation of a compressor. Background Art

[0002] The compressor air replenishment technology replenishes air to the compressor during operation to increase the mass flow rate of the refrigerant during the compression process, so that the compressor can achieve a compression process close to two-stage compression. At the same time, the heat exchanger in the system is used through the economizer to increase the enthalpy difference of the system, which effectively improves the refrigeration effect within a certain range. However, when the compressor operates in the second load condition of IPLV (integrated part load performance coefficient), the connection between the bypass port and the suction side will cause serious energy efficiency attenuation. Summary of the invention

[0003] In order to solve the technical problem in the prior art that the compressor has serious energy efficiency degradation under the second load condition, a sliding valve assembly and a compressor are provided for providing corresponding air replenishment for different working conditions of the compressor to reduce the problem of energy efficiency degradation of the compressor.

[0004] A sliding valve assembly, comprising:

[0005] A valve body, wherein the valve body is provided with an air supply cavity;

[0006] A partition is disposed in the air-injection cavity, and the partition divides the air-injection cavity into a relatively sealed first air-injection cavity and a second air-injection cavity;

[0007] The sliding valve assembly is applied to a compressor, and when the compressor is in a first load condition, the sliding valve assembly is in a first state in which the first air replenishing chamber replenishes air to the compressor, and when the compressor is in a second load condition, the sliding valve assembly is in a second state in which the second air replenishing chamber replenishes air to the compressor, and the load of the first load condition is greater than the load of the second load condition.

[0008] The first air-injection cavity has a first air-injection channel and a first air-injection hole communicated with the air-injection structure, and the second air-injection cavity has a second air-injection channel and a second air-injection hole communicated with the air-injection structure;

[0009] And in the first state, the air supply structure is connected to the compressor through the first air supply channel, the first air supply cavity and the first air supply hole;

[0010] In the second state, the air supply structure is connected to the compressor through the second air supply channel, the second air supply cavity and the second air supply hole.

[0011] The compressor includes a rotor pair, and along the direction from the intake side of the rotor pair to the exhaust side of the rotor pair, the rotor pair is sequentially provided with a first tooth groove, a second tooth groove, a third tooth groove and a fourth tooth groove. In the first state, the air supply structure is connected to the second tooth groove through the first air supply hole, and in the second state, the air supply structure is connected to the fourth tooth groove through the second air supply hole.

[0012] The compressor also includes a bypass port. In the first state, the valve body closes the bypass port. In the second state, the first tooth groove, the second tooth groove and the third tooth groove are all connected to the bypass port, and the bypass port is connected to the suction side of the rotor pair.

[0013] The rotor pair includes a male rotor and a female rotor meshing with each other. The number of the first air supply holes is plural, and some of the first air supply holes point to the male rotor, while the remaining first air supply holes point to the female rotor.

[0014] The rotor pair includes a male rotor and a female rotor meshing with each other. The number of the second air supply holes is plural, and some of the second air supply holes point to the male rotor, while the remaining second air supply holes point to the female rotor.

[0015] The compressor includes a shell, on which a first connecting pipeline and a second connecting pipeline are arranged. When the sliding valve assembly is in the first state, the first air supplement channel is connected to the first connecting pipeline. When the sliding valve assembly is in the second state, the second air supplement channel is connected to the second connecting pipeline.

[0016] The distance between the first communicating pipeline and the second communicating pipeline is greater than the distance between the first supplementary air channel and the second supplementary air channel.

[0017] The sliding valve assembly further includes a driving mechanism. When the sliding valve assembly switches between the first state and the second state, the valve body slides along a set direction driven by the driving mechanism.

[0018] The compressor is applied to a refrigerant heat exchange cycle, the refrigerant heat exchange cycle includes an economizer, and the economizer constitutes the air replenishment structure.

[0019] A compressor comprises the above-mentioned sliding valve assembly.

[0020] The sliding valve assembly and compressor for reducing the problem of energy efficiency degradation of the compressor provided by the present invention are provided with a first air replenishing chamber and a second air replenishing chamber to replenish air to the compressor under different working conditions of the compressor, thereby ensuring that the compressor is normally replenished under the first load condition. When the compressor is partially loaded, the air replenishment can be used to overcome the problem of energy efficiency degradation caused by bypass of the compressor, thereby effectively improving the energy efficiency of the compressor under the second load condition, and further improving the IPLV of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic structural diagram of a slide valve assembly for reducing the energy efficiency degradation problem of a compressor and a slide valve assembly of an embodiment of a compressor provided by the present invention;

[0022] Figure 2 A cross-sectional view of a slide valve assembly of an embodiment of a compressor and a slide valve assembly for reducing the energy efficiency degradation problem of a compressor provided by the present invention;

[0023] Figure 3 A diagram showing the matching state of the slide valve assembly and the rotor pair of the compressor under the first load condition in an embodiment of the slide valve assembly and the compressor for reducing the energy efficiency degradation problem of the compressor provided by the present invention;

[0024] Figure 4 A diagram showing the matching state of the slide valve assembly and the rotor pair of the compressor under the second load condition in an embodiment of the slide valve assembly and the compressor for reducing the energy efficiency degradation problem of the compressor provided by the present invention;

[0025] Figure 5 A flow direction diagram of a compressor under a first load condition, which is an embodiment of a slide valve assembly and a compressor for reducing the energy efficiency degradation problem of a compressor provided by the present invention;

[0026] Figure 6 A flow direction diagram of the compressor of an embodiment of a slide valve assembly and a compressor for reducing the energy efficiency degradation problem of a compressor provided by the present invention under a second load condition;

[0027] In the figure:

[0028] 1. Valve body; 2. Partition; 11. First air-injection cavity; 12. Second air-injection cavity; 31. First air-injection channel; 32. First air-injection hole; 41. Second air-injection channel; 42. Second air-injection hole; 51. First tooth groove; 52. Second tooth groove; 53. Third tooth groove; 54. Fourth tooth groove; 55. Bypass port; 61. Male rotor; 62. Female rotor; 71. First connecting pipeline; 72. Second connecting pipeline. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] The compressor in the prior art generally replenishes air to the compressor under the first load condition (full load condition) of the compressor, thereby improving the compression performance of the compressor under the first load condition. However, when the compressor is in the second load condition (partial load condition), the bypass port of the compressor is opened, and part of the suction air of the rotor pair is returned to the suction side, and the air replenishment port of the slide valve is directly connected to the bypass port through the tooth groove of the rotor pair, causing the slide valve to be unable to perform normal air replenishment, causing the compressor to have a serious problem of energy efficiency attenuation. Therefore, the present application provides the following Figures 1 to 6 The slide valve assembly shown includes: a valve body 1, on which an air replenishing cavity is provided; a partition 2, which is provided in the air replenishing cavity, and the partition 2 divides the air replenishing cavity into a relatively sealed first air replenishing cavity 11 and a second air replenishing cavity 12; the slide valve assembly is applied to a compressor, and when the compressor is in a first load condition, the slide valve assembly is in a first state in which the first air replenishing cavity 11 replenishes air to the compressor, and when the compressor is in a second load condition, the slide valve assembly is in a second state in which the second air replenishing cavity 12 replenishes air to the compressor, and the load of the first load condition is greater than the load of the second load condition, so that the slide valve assembly can meet the condition that the compressor can be normally replenished with air under the first load condition, and the compressor can also be replenished with air under the second load condition, thereby reducing the serious problem of energy efficiency attenuation in the compressor and effectively improving the performance of the compressor.

[0031] The first air replenishing chamber 11 has a first air replenishing channel 31 and a first air replenishing hole 32 connected to the air replenishing structure, and the second air replenishing chamber 12 has a second air replenishing channel 41 and a second air replenishing hole 42 connected to the air replenishing structure; and in the first state, the air replenishing structure is connected to the compressor through the first air replenishing channel 31, the first air replenishing chamber 11 and the first air replenishing hole 32; in the second state, the air replenishing structure is connected to the compressor through the second air replenishing channel 41, the second air replenishing chamber 12 and the second air replenishing hole 42, that is, when the compressor is in different working conditions, the air replenishing structure is replenished into the compressor through the corresponding channels, cavities and air replenishing holes, thereby overcoming the problem of energy efficiency attenuation of the compressor under the second load condition.

[0032] The compressor includes a rotor pair, and along the direction from the suction side of the rotor pair to the exhaust side of the rotor pair, the rotor pair is sequentially provided with a first tooth groove 51, a second tooth groove 52, a third tooth groove 53 and a fourth tooth groove 54, such as Figure 3In the first state, the compressor is operating in the first load condition, and the air supply structure is connected with the second tooth groove 52 through the first air supply hole 32, so that the air supply can flow through the first air supply channel 31, the first air supply cavity 11 and the first air supply hole 32 in sequence to the second tooth groove 52 of the rotor pair of the compressor, thereby completing the air supply to the compressor. Figure 4 In the second state, the compressor is in the second load condition. At this time, the first tooth slot 51, the second tooth slot 52 and the third tooth slot 53 on the rotor pair are all connected to the suction side of the rotor pair. Therefore, the air replenishment to the first tooth slot 51, the second tooth slot 52 and the third tooth slot 53 has no effect on the actual suction volume and cooling capacity of the compressor. Therefore, the present application connects the air replenishment of the air replenishment structure with the fourth tooth slot 54 through the second air replenishment hole 42, so that the air replenishment in the air replenishment structure flows through the second air replenishment cavity 12 and the second air replenishment hole 42 in turn to the fourth tooth slot 54 of the rotor pair of the compressor, thereby achieving the purpose of increasing the efficiency of the compressor.

[0033] The compressor also includes a bypass port 55. In the first state, the valve body 1 closes the bypass port 55 to ensure that the compressor can perform compression normally, and the supplementary air cannot flow out of the compressor from the bypass port 55, which effectively increases the energy efficiency of the compressor. In the second state, the first tooth groove 51, the second tooth groove 52 and the third tooth groove 53 are all connected to the bypass port 55, and the bypass port 55 is connected to the suction side of the rotor pair, so that the compressor can switch to the second load condition.

[0034] The rotor pair includes a male rotor 61 and a female rotor 62 that are meshed with each other. The number of the first air supply holes 32 is multiple, and some of the first air supply holes 32 point to the male rotor 61, and the remaining first air supply holes 32 point to the female rotor 62, that is, the first air supply holes 32 are arranged in strips corresponding to the tooth grooves, and the number of strips is at least one.

[0035] The rotor pair includes a male rotor 61 and a female rotor 62 that are meshed with each other. The number of the second air supply holes 42 is multiple, and some of the second air supply holes 42 point to the male rotor 61, and the remaining second air supply holes 42 point to the female rotor 62, that is, the second air supply holes 42 are arranged in strips corresponding to the tooth grooves, and the number of strips is at least one.

[0036] The compressor includes a shell, on which a first connecting pipe 71 and a second connecting pipe 72 are provided. When the sliding valve assembly is in the first state, the first air supply channel 31 is connected to the first connecting pipe 71. When the sliding valve assembly is in the second state, the second air supply channel 41 is connected to the second connecting pipe 72. According to the connection state of the first connecting pipe 71 and the second connecting pipe 72, it is possible to switch the first air supply chamber 11 to be connected to the air supply structure or the second air supply chamber 12 to be connected to the air supply structure.

[0037] The distance between the first connecting pipeline 71 and the second connecting pipeline 72 is greater than the distance between the first air supply channel 31 and the second air supply channel 41, so that the switching of the first air supply chamber 11 and the air supply structure or the second air supply chamber 12 and the air supply structure can be achieved by moving the position of the sliding valve, thereby minimizing the structural complexity of the sliding valve assembly.

[0038] The sliding valve assembly further includes a driving mechanism. When the sliding valve assembly switches between the first state and the second state, the valve body 1 slides along a set direction driven by the driving mechanism, so that the movement of the sliding valve assembly can be controlled to switch as needed.

[0039] The compressor is applied to a refrigerant heat exchange cycle, which includes an economizer, and the economizer constitutes the air replenishment structure, thereby increasing the enthalpy difference of the system and effectively improving the refrigeration effect within a certain range.

[0040] A compressor comprises the above-mentioned sliding valve assembly.

[0041] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A sliding valve assembly, characterized in that: include: A valve body (1), wherein the valve body (1) is provided with an air supply cavity; A partition (2) is arranged in the air-replenishing cavity, and the partition (2) divides the air-replenishing cavity into a first air-replenishing cavity (11) and a second air-replenishing cavity (12) which are relatively sealed; The slide valve assembly is applied to a compressor, and when the compressor is in a first load condition, the slide valve assembly is in a first state in which the first air replenishing chamber (11) replenishes air to the compressor, and when the compressor is in a second load condition, the slide valve assembly is in a second state in which the second air replenishing chamber (12) replenishes air to the compressor, and the load of the first load condition is greater than the load of the second load condition.

2. The sliding valve assembly according to claim 1, characterized in that: The first air-injection cavity (11) has a first air-injection channel (31) and a first air-injection hole (32) in communication with the air-injection structure, and the second air-injection cavity (12) has a second air-injection channel (41) and a second air-injection hole (42) in communication with the air-injection structure; And in the first state, the air supply structure is connected to the compressor through the first air supply channel (31), the first air supply cavity (11) and the first air supply hole (32); In the second state, the air supply structure is in communication with the compressor via the second air supply channel (41), the second air supply cavity (12) and the second air supply hole (42).

3. The sliding valve assembly according to claim 2, characterized in that: The compressor comprises a rotor pair, and along the direction from the intake side of the rotor pair to the exhaust side of the rotor pair, the rotor pair is provided with a first tooth groove (51), a second tooth groove (52), a third tooth groove (53) and a fourth tooth groove (54) in sequence. In the first state, the air supply structure is connected to the second tooth groove (52) through the first air supply hole (32), and in the second state, the air supply structure is connected to the fourth tooth groove (54) through the second air supply hole (42).

4. The sliding valve assembly according to claim 3, characterized in that: The compressor further comprises a bypass port (55). In the first state, the valve body (1) closes the bypass port (55). In the second state, the first tooth groove (51), the second tooth groove (52) and the third tooth groove (53) are all connected to the bypass port (55), and the bypass port (55) is connected to the suction side of the rotor pair.

5. The sliding valve assembly according to claim 3, characterized in that: The rotor pair comprises a male rotor (61) and a female rotor (62) meshing with each other, the number of the first air supply holes (32) is multiple, and some of the first air supply holes (32) point to the male rotor (61), and the remaining first air supply holes (32) point to the female rotor (62).

6. The sliding valve assembly according to claim 3, characterized in that: The rotor pair comprises a male rotor (61) and a female rotor (62) meshing with each other, the number of the second air supply holes (42) is plural, and some of the second air supply holes (42) point to the male rotor (61), and the remaining part of the second air supply holes (42) point to the female rotor (62).

7. The sliding valve assembly according to claim 2, characterized in that: The compressor comprises a shell, on which a first connecting pipeline (71) and a second connecting pipeline (72) are arranged; when the slide valve assembly is in the first state, the first air supply channel (31) is connected to the first connecting pipeline (71); when the slide valve assembly is in the second state, the second air supply channel (41) is connected to the second connecting pipeline (72).

8. The sliding valve assembly according to claim 7, characterized in that: The distance between the first connecting pipeline (71) and the second connecting pipeline (72) is greater than the distance between the first air supplement channel (31) and the second air supplement channel (41).

9. The sliding valve assembly according to claim 8, characterized in that: The slide valve assembly further comprises a driving mechanism, and when the slide valve assembly switches between the first state and the second state, the valve body (1) slides along a set direction driven by the driving mechanism.

10. The sliding valve assembly according to claim 2, characterized in that: The compressor is applied to a refrigerant heat exchange cycle, the refrigerant heat exchange cycle includes an economizer, and the economizer constitutes the air replenishing structure.

11. A compressor comprising the sliding valve assembly according to any one of claims 1 to 10.

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