阅读说明：本技术 一种双向型制冷系统节流阀 (Two-way type refrigerating system choke valve ) 是由 赵密升 徐子超 刘振乐 于 2020-07-23 设计创作，主要内容包括：本发明公开了一种双向型制冷系统节流阀,阀体内壳固定于阀体外壳的内部,所述双向喷嘴滑块位于阀体内壳的内部,双向喷嘴滑块的两侧设有左限位弹簧和右限位弹簧；所述阀体内壳的左侧设有左泄压槽口,所述阀体内壳的右侧设有右泄压槽口；双向喷嘴滑块位于阀体内壳中间位置时,双向喷嘴滑块盖住左泄压槽口和右泄压槽口,没有制冷剂从左泄压槽口和右泄压槽口流出,双向喷嘴滑块发生移动,左泄压槽口或右泄压槽口暴露,冷剂从左泄压槽口或右泄压槽口流出。本发明采用沙漏状喷嘴结构达到膨胀节流目的,同时通过双向喷嘴滑块两端的压差克服弹簧张力,实现滑块的左右移动,部分制冷剂从分流到泄压槽口节流,卸除高压侧过高的压力,从而实现机组稳定运行。(The invention discloses a two-way type refrigerating system throttle valve, wherein a valve body inner shell is fixed inside a valve body outer shell, a two-way nozzle sliding block is positioned inside the valve body inner shell, and a left limiting spring and a right limiting spring are arranged on two sides of the two-way nozzle sliding block; the left side of the valve body inner shell is provided with a left pressure relief notch, and the right side of the valve body inner shell is provided with a right pressure relief notch; when the two-way nozzle slider is located valve body inner shell intermediate position, the two-way nozzle slider covers left pressure release notch and right pressure release notch, does not have the refrigerant to flow from left pressure release notch and right pressure release notch, and the two-way nozzle slider takes place to remove, and left pressure release notch or right pressure release notch expose, and the refrigerant flows from left pressure release notch or right pressure release notch. The invention adopts the hourglass-shaped nozzle structure to achieve the purpose of expansion and throttling, overcomes the tension of a spring through the pressure difference at the two ends of the bidirectional nozzle sliding block, realizes the left and right movement of the sliding block, throttles part of refrigerant from a shunt to a pressure relief notch, and relieves the overhigh pressure at the high-pressure side, thereby realizing the stable operation of the unit.)

1. A bidirectional throttling valve for a refrigeration system is characterized by comprising a valve body outer shell (1), a valve body inner shell (2), a left limiting spring (4), a bidirectional nozzle sliding block (5), a right limiting spring (6) and a partition structure (11); the valve body inner shell (2) is fixed inside the valve body outer shell (1), the bidirectional nozzle sliding block (5) is located inside the valve body inner shell (2), and a left limiting spring (4) and a right limiting spring (6) are respectively arranged on two sides of the bidirectional nozzle sliding block (5); the partition structure (11) is positioned at the periphery of the valve body inner shell (2), a left pressure relief notch (9) is formed in the left side of the valve body inner shell (2), and a right pressure relief notch (13) is formed in the right side of the valve body inner shell (2); when two-way nozzle slider (5) were located valve body inner shell (2) intermediate position, two-way nozzle slider (5) covered left pressure release notch (9) and right pressure release notch (13), did not have the refrigerant to flow from left pressure release notch (9) and right pressure release notch (13), when two-way nozzle slider (5) took place to remove, left pressure release notch (9) or right pressure release notch (13) leaked, the refrigerant flowed from left pressure release notch (9) or right pressure release notch (13).

2. The two-way type refrigerant system throttling valve according to claim 1, wherein a support portion (16) is provided inside the valve body outer housing (1), and the valve body inner housing (2) is fixed inside the valve body outer housing (1) by the support portion (16).

3. The throttling valve for the bidirectional refrigeration system according to claim 1, wherein a right pressure relief channel is connected to the left pressure relief notch (9), and the right pressure relief channel passes through the other end of the partition structure (11) and is communicated with the right port (18).

4. The throttling valve for the bidirectional refrigeration system according to claim 1, wherein a left pressure relief channel is connected to the right pressure relief notch (13), and the left pressure relief channel passes through the other end of the partition structure (11) and is communicated with the left port (17).

5. The bi-directional refrigerant system throttling valve according to claim 1, wherein said left and right pressure relief notches (9, 13) are one-way flow through.

6. The two-way type refrigerant system throttling valve according to claim 1, wherein both ends of the valve body inner shell (2) are respectively provided with a left spring limiting structure (7) and a right spring limiting structure (15); the left spring limiting structure (7) is blocked on the left side of the left limiting spring (4), and the right spring limiting structure (15) is blocked on the right side of the right limiting spring (6).

7. The throttling valve of the bidirectional refrigeration system according to claim 1, wherein the bidirectional nozzle slider (5) has a thin middle and thick two ends, and has an elastic hourglass-shaped structure, the two ends of the bidirectional nozzle slider are fixedly connected with the left slider (19) and the right slider (20), and the middle of the bidirectional nozzle slider is provided with the nozzle structure.

8. The two-way type refrigerant system throttling valve of claim 7, wherein the inner cavity of the valve body inner shell (2) is provided with a left slider limiting structure A (8) and a left slider limiting structure B (10), and the left slider (19) is positioned between the left slider limiting structure A (8) and the left slider limiting structure B (10).

9. The two-way type refrigerant system throttling valve according to claim 1, wherein the inner cavity of the valve body inner shell (2) is provided with a right slider limiting structure B (12) and a right slider limiting structure A (14), and the right slider (20) is positioned between the right slider limiting structure B (12) and the right slider limiting structure A (14).

10. The two-way type refrigerant system throttling valve according to claim 7, further comprising a rubber sealing ring (3), wherein the rubber sealing ring (3) is sleeved on the outer side of the left sliding block (19) and the right sliding block (20).

Technical Field

The invention relates to the technical field of throttling components in refrigeration, air-conditioning and heat pump industries, in particular to a bidirectional throttling valve for a refrigeration system.

Background

The throttling component of the traditional refrigeration heat pump industry generally adopts an electronic expansion valve/a thermal expansion valve/a capillary tube to realize the throttling of the system. The electronic expansion valve has the disadvantages of complex structure, high processing cost, increased unit control cost, poor stability of electronic equipment and easy out-of-control. The thermal expansion valve has a relatively complex structure, high processing cost and low control precision, and can not respond to valve opening in time according to pressure. And the capillary structure is single, can not adjust, leads to easily that the system appears high pressure trouble under the high load high pressure operating mode of adaptation.

The present invention has been made to solve these problems.

Disclosure of Invention

The invention aims to provide a two-way type refrigerating system throttling valve, which adopts an hourglass-shaped nozzle structure to replace capillary throttling so as to achieve the purpose of expansion throttling, overcomes the tension of a spring through the pressure difference at two ends of a nozzle sliding block, realizes the left and right movement of the sliding block, throttles part of refrigerant from a branch opening, and relieves the overhigh pressure at a high-pressure side, thereby realizing the stable operation of a unit under the working condition of high pressure and high load.

The purpose of the invention can be realized by the following technical scheme:

a bidirectional throttling valve for a refrigeration system comprises a valve body outer shell, a valve body inner shell, a left limiting spring, a bidirectional nozzle sliding block, a right limiting spring and a partition structure; the two-way nozzle sliding block is positioned in the valve body inner shell, and a left limiting spring and a right limiting spring are respectively arranged on two sides of the two-way nozzle sliding block; the partition structure is positioned at the periphery of the valve body inner shell and used for preventing the refrigerant from flowing left and right in the external space of the valve body inner shell, a left pressure relief notch is formed in the left side of the valve body inner shell, and a right pressure relief notch is formed in the right side of the valve body inner shell; when the two-way nozzle slider is located valve body inner shell intermediate position, the two-way nozzle slider covers left pressure release notch and right pressure release notch, does not have the refrigerant to flow from left pressure release notch and right pressure release notch, and when the two-way nozzle slider took place to remove, left pressure release notch or right pressure release notch leaked, and the refrigerant flowed from left pressure release notch or right pressure release notch.

Preferably, the inside of valve body outer casing is equipped with the supporting part, the valve body inner shell is fixed in the inside of valve body outer casing through the supporting part.

Furthermore, the left pressure relief notch is connected with a right pressure relief channel, and the right pressure relief channel penetrates through the other end of the partition structure and is communicated with the right port.

Preferably, the right pressure relief notch is connected with a left pressure relief channel, and the left pressure relief channel penetrates through the other end of the partition structure and is communicated with the left port.

Preferably, the left pressure relief notch and the right pressure relief notch both have one-way flow.

Preferably, a left spring limiting structure and a right spring limiting structure are respectively arranged at two ends of the valve body inner shell; the left spring limiting structure is blocked on the left side of the left limiting spring, and the right spring limiting structure is blocked on the right side of the right limiting spring.

Preferably, the bidirectional nozzle sliding block is of an elastic hourglass-shaped structure with a thin middle part and thick two ends, the two ends of the bidirectional nozzle sliding block are fixedly connected with the left sliding block and the right sliding block, and the middle part of the bidirectional nozzle sliding block is of a nozzle structure.

Preferably, the inner cavity of the valve body inner shell is provided with a left slider limiting structure A and a left slider limiting structure B, and the left slider is positioned between the left slider limiting structure A and the left slider limiting structure B.

Preferably, the inner cavity of the valve body inner shell is provided with a right sliding block limiting structure B and a right sliding block limiting structure A, and the right sliding block is located between the right sliding block limiting structure B and the right sliding block limiting structure A.

Preferably, the rubber sealing ring is sleeved on the outer sides of the left sliding block and the right sliding block.

The invention has the beneficial effects that:

the invention adopts the hourglass-shaped nozzle structure to replace capillary throttling so as to achieve the purpose of expansion throttling, overcomes the tension of a spring through the pressure difference at the two ends of the bidirectional nozzle sliding block, realizes the left-right movement of the sliding block, throttles part of refrigerant from a shunt to a pressure relief notch, and relieves the overhigh pressure at the high-pressure side, thereby realizing the stable operation of the unit under the high-pressure and high-load working condition; compared with an electronic expansion valve, the invention has simpler structure, can realize the operation of all working conditions of refrigeration/heating, is convenient to install, has stable automatic pressure relief control, and does not need to independently increase the control cost of the unit.

Drawings

The invention will be further described with reference to the accompanying drawings.

FIG. 1 is a schematic top view cross-sectional view of a bi-directional refrigerant system throttle valve of the present invention in its normal operating condition.

Fig. 2 is a schematic top sectional view of the throttle high pressure section of the bi-directional refrigeration system of the present invention.

FIG. 3 is a schematic view of the forward view of the throttle valve of the bi-directional refrigeration system of the present invention in its normal operating condition.

Fig. 4 is a schematic front view of the high pressure section of the throttle valve of the bi-directional refrigeration system of the present invention.

Reference numerals:

1-a valve body housing; 2-valve body inner shell; 3-a rubber sealing ring; 4-a left limit spring; 5-bidirectional nozzle slide block; 6-right limit spring; 7-a left spring limit structure; 8-a left slider limiting structure A; 9-left relief notch; 10-a left slider limiting structure B; 11-a partition structure; 12-a right slider limiting structure B; 13-right relief notch; 14-right slider limit structure A; 15-right spring limit structure; 16-a support portion; 17-left port; 18-right port; 19-left slider; 20-right slider.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, a two-way type throttle valve for a refrigeration system includes a valve body outer shell 1, a valve body inner shell 2, a left limit spring 4, a two-way nozzle slider 5, a right limit spring 6, and a partition structure 11; the valve body inner shell 2 is fixed inside the valve body outer shell 1, the bidirectional nozzle sliding block 5 is positioned inside the valve body inner shell 2, and a left limiting spring 4 and a right limiting spring 6 are respectively arranged on two sides of the bidirectional nozzle sliding block 5; the partition structure 11 is positioned at the periphery of the valve body inner shell 2 and prevents a refrigerant from flowing left and right in the external space of the valve body inner shell 2, a left pressure relief notch 9 is formed in the left side of the valve body inner shell 2, and a right pressure relief notch 13 is formed in the right side of the valve body inner shell 2; when two-way nozzle slider 5 was located 2 intermediate positions of valve body inner shell, two-way nozzle slider 5 sheltered from left pressure release notch 9 and right pressure release notch 13, did not have the refrigerant to flow from left pressure release notch 9 and right pressure release notch 13, and two-way nozzle slider 5 takes place to remove the back, and left pressure release notch 9 or right pressure release notch 13 spill, and the refrigerant flows from left pressure release notch 9 or right pressure release notch 13.

Referring to fig. 2 and 4, when in use, two ends of the valve body shell of the throttle valve are welded on an intermediate pipeline of an evaporator condenser of a refrigeration system; when the unit operates under a normal working condition, the pressure of the unit fails to reach the limit load pressure, the refrigerant pressure difference at the two ends of the throttle valve cannot overcome the spring tension, and the left limit spring and the right limit spring at the left end and the right end fix the bidirectional nozzle sliding block at the middle position; when the refrigerating system operates in a high-load working condition, the high-pressure side pressure exceeds the limit load pressure, at the moment, the pressure of refrigerant at the high-pressure side overcomes the tension of a spring, the two-way nozzle sliding block is forced to move towards the low-pressure side, and when the pressure is gradually increased, the pressure is gradually leaked out along with the movement of the two-way nozzle sliding block, so that part of refrigerant is throttled from the pressure relief notch. Thereby partial refrigerant has alleviated the nozzle and has throttled under high-pressure operation and leaded to the problem of system inadequately to the pressure release notch throttling, realizes the steady operation of unit under the operating mode.

The valve body inner shell 2 is fixed inside the valve body outer shell 1 through the supporting part 16.

The left pressure relief notch 9 is connected with a right pressure relief channel, the right pressure relief channel penetrates through the other end of the partition structure 11 and is communicated with a right port 18, the right pressure relief notch 13 is connected with a left pressure relief channel, and the left pressure relief channel penetrates through the other end of the partition structure 11 and is communicated with a left port 17; the refrigerant flows out of the throttle valve from the left port 17 or the right port 18.

The left relief notch 9 and the right relief notch 13 are both provided with one-way flow, and in order to prevent the refrigerant from flowing back to the valve body inner shell 2.

The two ends of the valve body inner shell 2 are respectively provided with a left spring limiting structure 7 and a right spring limiting structure 15; the left spring limiting structure 7 is arranged on the left side of the left limiting spring 4 in a blocking mode, and the right spring limiting structure 15 is arranged on the right side of the right limiting spring 6 in a blocking mode. The left spring limiting structure 7 is used for preventing the left limiting spring 4 from popping out of the left end of the valve body inner shell 2, and the right spring limiting structure 15 is used for preventing the right limiting spring 6 from popping out of the right end of the valve body inner shell 2.

The bidirectional nozzle sliding block 5 is of an elastic hourglass-shaped structure with a thin middle part and two thick ends, the two ends are provided with a left sliding block 19 and a right sliding block 20, the middle part is provided with a nozzle structure, and a refrigerant flows out of the nozzle structure.

The inner cavity of the valve body inner shell 2 is provided with a left slide block limiting structure A8 and a left slide block limiting structure B10, and the left slide block 19 is positioned between the left slide block limiting structure A8 and the left slide block limiting structure B10; the left slide block limiting structure A8 and the left slide block limiting structure B10 limit the sliding distance of the left slide block 19, and the operation safety of the bidirectional type refrigerating system throttle valve is ensured.

The inner cavity of the valve body inner shell 2 is provided with a right slide block limiting structure B12 and a right slide block limiting structure A14, and the right slide block 20 is positioned between the right slide block limiting structure B12 and the right slide block limiting structure A14; the right slider limiting structure B12 and the right slider limiting structure A14 are used for limiting the sliding distance of the right slider 20, and the operation safety of the bidirectional refrigeration system throttle valve is ensured.

The sealing structure further comprises a rubber sealing ring 3, wherein the rubber sealing ring 3 is sleeved on the outer sides of the left sliding block 19 and the right sliding block 20 and used for ensuring the sealing performance of the inner surfaces of the left sliding block 19, the right sliding block 20 and the valve body inner shell 2 and preventing refrigerant from flowing out of gaps between the inner surfaces of the left sliding block 19, the right sliding block 20 and the valve body inner shell 2.

While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.