Liquid distributor and compressor

Abstract

The present invention discloses a liquid distributor and a compressor, wherein the liquid distributor comprises a cylinder and an elastic tube, wherein an expansion and contraction cavity is formed in the elastic tube, and the expansion and contraction cavity and the cylinder inner cavity are interconnected, so that when the pressure in the cylinder changes, the elastic tube undergoes elastic deformation along with the pressure in the cylinder to adjust the volume of the expansion and contraction cavity. The liquid distributor of the present invention automatically adjusts the gas specific volume of the compressor through the elastic tube, maintains a stable refrigerant flow rate delivered by the compressor, ensures a constant pressure ratio of the compressor, and thereby maintains a stable volumetric efficiency of the compressor.

Description

Technical Field

[0001] The invention belongs to the field of refrigeration, and in particular relates to a liquid distributor and a compressor. Background Art

[0002] In low-pressure cavity rotor compressors, the refrigerant is compressed by the compressor pump body and then discharged directly from the compressor through the pipeline and enters the condenser in the refrigeration or heating system. However, the following two problems often occur during system testing and compressor operation:

[0003] 1. The situation where the energy efficiency of the compressor is reduced due to unstable suction and exhaust pressure: When the pressure difference in the liquid distributor is large, the pressure drop on the suction side of the compressor will increase during operation, which will increase the specific volume of the gas returning to the compressor, causing the refrigerant flow rate delivered by the compressor to decrease, resulting in a decrease in cooling capacity and efficiency; selecting a liquid distributor that is too large will increase the cost of the compressor.

[0004] 2. The design of the dispenser bracket also causes the dispenser body and the entire machine to vibrate more obviously, resulting in increased vibration of the compressor as a whole, which is inconsistent with the original intention of reducing vibration in the compressor design.

[0005] Therefore, how to prevent the compressor from being affected by system pressure fluctuations during operation and reduce the vibration generated by the compressor during operation has become a technical problem that needs to be urgently solved by technical personnel in this field. Summary of the invention

[0006] The object of the present invention is to provide a liquid distributor and a compressor, which can ensure that the pressure drop difference of the compressor is constant.

[0007] To achieve the above object, the specific technical solution of the liquid dispenser of the present invention is as follows:

[0008] A liquid distributor comprises a cylinder and an elastic tube. An expansion and contraction cavity is formed in the elastic tube. The expansion and contraction cavity and the inner cavity of the cylinder are connected to each other. When the pressure in the cylinder changes, the elastic tube undergoes elastic deformation along with the pressure in the cylinder to adjust the volume of the expansion and contraction cavity.

[0009] Furthermore, the total volume of the cylinder and the elastic tube in the elastic tube is 1-1.3 times the total volume of the cylinder and the elastic tube before the elastic deformation of the elastic tube.

[0010] Furthermore, the elastic tube is arranged outside the cylinder, and a through hole is opened at the connection between the cylinder and the elastic tube, and the through hole connects the inner cavity of the cylinder and the elastic tube.

[0011] Furthermore, the elastic tube is formed with an opening on one side in contact with the cylinder, and the edges on both sides of the opening are fixedly connected and sealed to the cylinder.

[0012] Furthermore, an air intake pipe is provided at the top of the cylinder, and the air intake pipe is provided with a control valve.

[0013] Furthermore, the control valve includes a sealing cover and an adjusting rod, and a sealing hole is opened on the sealing cover; the adjusting rod is movably connected to the suction pipe, and the sealing hole is closed by moving the end of the adjusting rod.

[0014] Furthermore, the adjusting rod is threadedly connected to the air intake pipe.

[0015] The present invention also provides a compressor, and the specific scheme is as follows:

[0016] A compressor comprises a compressor body and the above-mentioned liquid distributor.

[0017] Furthermore, the outer side of the elastic tube is in contact with the compressor body and is fixedly connected to the compressor body.

[0018] The liquid distributor and compressor of the present invention have the following advantages:

[0019] 1. Automatically adjust the gas specific volume of the compressor through the elastic tube to keep the refrigerant flow delivered by the compressor stable, ensure the constant pressure ratio of the compressor, and thus maintain the stable volumetric efficiency of the compressor.

[0020] 2. By adjusting the size of the control valve, the refrigerant flow of the compressor is controlled, and then the specific volume of the gas inside the compressor is controlled to ensure that the pressure drop difference of the compressor is constant, thereby improving the compressor capacity and energy efficiency.

[0021] 3. It is connected to the compressor housing and the liquid distributor through an elastic tube. Because the elastic tube is made of flexible material, it can effectively reduce the vibration between the compressor liquid distributor and its bracket, and reduce the vibration of the compressor as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the compressor of the present invention;

[0023] Figure 2 It is a schematic diagram of the control valve structure of the present invention.

[0024] Description of the markings in the figure:

[0025] 1. Compressor body; 2. Cylinder; 21. Through hole; 3. Elastic tube; 31. Expansion and contraction chamber; 32. Opening; 4. Control valve; 41. Cover; 411. Upper baffle; 412. Partition; 413. Lower baffle; 42. Adjustment rod; 5. Intake pipe; 6. Exhaust pipe. DETAILED DESCRIPTION

[0026] In order to better understand the purpose, structure and function of the present invention, a liquid distributor and a compressor of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0027] like Figure 1As shown, the compressor of the present invention comprises a compressor body 1 and a liquid distributor which are connected to each other. The air outlet pipe 6 of the liquid distributor is installed on the air inlet of the compressor body 1, so that the liquid distributor and the compressor body 1 are connected and fixed to each other.

[0028] In order to stabilize the pressure of suction and exhaust, the liquid distributor includes a cylinder 2 and an elastic tube 3. An expansion and contraction cavity 31 is formed in the elastic tube 3, and the expansion and contraction cavity 31 and the inner cavity of the cylinder 2 are connected to each other, so that when the pressure in the cylinder 2 changes, the elastic tube 3 elastically deforms with the pressure in the cylinder 2, and adjusts the volume of the expansion and contraction cavity 31 to keep the pressure drop difference of the compressor constant.

[0029] The theoretical basis is as follows:

[0030] Compressor refrigeration capacity:

[0031] η v is the theoretical capacity of the compressor; q vt is the theoretical volumetric gas delivery of the compressor, in m 3 / h;q om V is the unit cooling capacity of the refrigerant under customized cooling conditions, in KJ / Kg; so The specific volume of refrigerant in the suction state, unit: m 3 / Kg.

[0032] For the same compressor, vt is a fixed value,

[0033] And because the compressor volumetric efficiency: η v =λ v ·λ p ·λ T ·λ L ·λ h ,

[0034] Leakage coefficient λ L , suction pressure loss λ p , reflux coefficient λ h ,, volume coefficient λ v , temperature coefficient λ T .

[0035] For the same compressor, the leakage coefficient λ L is a constant value. For the rotary compressor, there is no suction valve and the suction pressure loss can be ignored. Therefore, p Approximately 1, the compressor rotates at a small angle and the volume changes little, so λ h Approximately 1,;

[0036] For the same compressor, we can get: Q = A·λ T ·q om / Vso , A is a constant.

[0037] The present invention also defines the optimal volume of the effective volume of the liquid distributor, and theoretical analysis shows that:

[0038] V 容 =V0+A1·V0

[0039] V 容 is the effective volume of the dispenser, V0 is the volume of the fixed part of the dispenser (when the elastic tube is not expanded), A1 is a constant and (0≤A1≤0.3).

[0040] It can be seen from this that when the pressure difference inside the liquid distributor is large, the pressure drop on the suction side of the compressor will increase, and its gas specific volume V so At the same time, the increase in pressure ratio leads to a decrease in the volumetric efficiency of the compressor. For this solution, when the pressure on the suction side is high, the elastic tube installed on the upper part of the liquid distributor can expand adaptively to increase the effective volume inside the liquid distributor, keep the pressure ratio constant, and reduce the specific volume of the gas, thereby enhancing the refrigeration capacity of the compressor and improving energy efficiency.

[0041] In order to facilitate the gas flow in the inner cavity of the cylinder 2 and the expansion and contraction cavity 31, the elastic tube 3 is arranged outside the cylinder 2, and a through hole 21 is formed at the connection between the cylinder 2 and the elastic tube 3, and the through hole 21 connects the inner cavity of the cylinder 2 and the elastic tube 3. The elastic tube 3 is formed with an opening 32 on the side that is in contact with the cylinder 2, and the edges on both sides of the opening 32 are bonded to the cylinder 2, so that the elastic tube 3 is fixed to the cylinder 2.

[0042] The outer side of the elastic tube 3 is fitted with the compressor body 1 and bonded to the compressor body 1. Thus, the elastic tube 3 acts as a flexible connection to assist in fixing the compressor body 1 and the liquid distributor. In this way, the elastic tube 3 replaces the bracket to fix the liquid distributor, which can effectively reduce the vibration between the compressor liquid distributor and its bracket, and reduce the vibration of the compressor as a whole.

[0043] Combination Figure 2 As shown, in order to ensure the reasonable effective volume inside the liquid distributor, the suction pipe 5 at the top of the cylinder 2 is provided with a control valve 4. The refrigerant flow of the compressor is controlled by adjusting the valve size. The control valve 4 includes a cover 41 and an adjusting rod 42. The cover 41 closes the suction pipe 5, and the cover 41 includes an upper baffle 411, a partition 412 and a lower baffle 413. The upper baffle 411 is higher than the lower baffle 413. The two sides of the partition 412 are respectively connected to the upper baffle 411 and the lower baffle 413 as a whole. The partition 412 is provided with a sealing hole closed by an adjusting rod 42, and the adjusting rod 42 is threadedly connected to the air inlet pipe. Therefore, when the internal pressure of the liquid distributor is relatively large, the refrigerant intake amount is reduced by adjusting the adjusting rod 42 outward, thereby reducing the specific volume of the gas inside the compressor, and ensuring that the pressure drop difference of the compressor is constant.

[0044] In this way, the liquid distributor of the present invention can automatically adjust the gas specific volume of the compressor through the elastic tube 3 when the internal pressure difference is large, so as to keep the refrigerant flow rate delivered by the compressor stable, ensure the constant pressure ratio of the compressor, and thus maintain the stable volumetric efficiency of the compressor. The design of the control valve 4 can control the refrigerant flow rate of the compressor by adjusting the valve size at the air inlet of the compressor, thereby controlling the gas specific volume inside the compressor and ensuring the constant pressure drop difference of the compressor.

[0045] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A liquid dispenser, characterized in that: The invention comprises a cylinder (2) and an elastic tube (3), wherein an expansion and contraction cavity (31) is formed in the elastic tube (3), and the expansion and contraction cavity (31) and the inner cavity of the cylinder (2) are connected to each other, so that when the pressure in the cylinder (2) changes, the elastic tube (3) elastically deforms along with the pressure in the cylinder (2), and the volume of the expansion and contraction cavity (31) is adjusted to make the pressure drop difference of the compressor constant. The outer side of the elastic tube (3) is fitted with the compressor body (1) and is bonded to the compressor body (1) to fix the liquid distributor. The top of the cylinder (2) is provided with an air intake pipe (5), and the air intake pipe (5) is provided with a control valve (4).

2. The liquid dispenser according to claim 1, characterized in that: The total volume of the cylinder (2) and the elastic tube (3) is 1 to 1.3 times the total volume of the cylinder (2) and the elastic tube (3) before the elastic tube (3) is elastically deformed.

3. The liquid dispenser according to claim 1, characterized in that: The elastic tube (3) is arranged outside the cylinder (2), and a through hole (21) is formed in the cylinder (2) at the junction with the elastic tube (3). The through hole (21) enables the inner cavity of the cylinder (2) and the elastic tube (3) to be connected.

4. The liquid dispenser according to claim 3, characterized in that: The elastic tube (3) is formed with an opening (32) on one side in contact with the cylinder (2), and the edges on both sides of the opening (32) are fixedly connected and sealed to the cylinder (2).

5. The liquid dispenser according to claim 1, characterized in that: The control valve (4) comprises a sealing cover (41) and an adjusting rod (42). The sealing cover (41) is provided with a sealing hole. The adjusting rod (42) is movably connected to the air intake pipe (5), and the sealing hole is closed by moving the end of the adjusting rod (42).

6. The liquid dispenser according to claim 1, characterized in that: The adjusting rod (42) is threadedly connected to the air inlet pipe.

7. A compressor, characterized in that: It comprises a compressor body (1), and a liquid distributor as claimed in any one of claims 1 to 6.

8. The compressor according to claim 7, characterized in that The outer side of the elastic tube (3) is in contact with the compressor body (1) and is fixedly connected to the compressor body (1).

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