CN103411357B - Air-condition bidirectional throttle valve with three-time throttling and vibration damping function - Google Patents

Abstract

The invention discloses an air-condition bidirectional throttle valve with a three-time throttling and vibration damping function. A sealed steel ball is installed in a central hole of an upper membrane cover which is located at the top end of the valve; a membrane is installed between the upper membrane cover and a lower membrane cover; a transmission block is installed below the membrane and is fixed to the valve body through a transmission block positioning round plate; a transmission rod, the upper end of which penetrates the transmission block positioning round plate and is connected to a groove of the transmission block, is installed at the central position of the valve body; the lower end of the transmission rod penetrates a liquid outlet and is connected to a tapered valve core; an adjusting spring is connected below the tapered valve core; a ball pad is connected below the adjusting spring; the ball pad is connected to an adjusting seat through three steel balls which are distributed uniformly at left and right. The air-condition bidirectional throttle valve with the three-time throttling and vibration damping function overcomes the problem that the refrigeration capability is balanced difficultly during the bidirectional flow by adding each single-throttling channel at the two ends of the valve opening of the throttle valve, reduces resonant interaction by changing partial structure of the valve core, and overcomes the problems of blockage of an air flow channel, reduced flow area and insufficient temperature induction of an air box head when the valve works in a state of relatively big open degree by changing partial structure of the transmission block.

Description

Air conditioner two-way throttle valve with triple throttling and vibration damping functions

technical field

The invention relates to an air-conditioning refrigerant throttling control valve, in particular to an air-conditioning two-way throttling valve with three throttling and damping functions.

Background technique

In the refrigeration system, the throttling mechanism, the compressor, the condenser, and the evaporator are called the "four major parts" of the refrigeration system. They are one of the essential components in the refrigeration system. Controls the flow rate of the evaporator refrigerant and the superheat of the evaporator outlet. The existing throttling mechanism has only one or two throttling during use, and it is difficult to achieve a balance of refrigeration capacity during two-way flow. After adjustment, the flow fluctuates greatly, and the anti-interference ability is weak. For phenomena such as "howling" caused by resonance, once the valve is opened a lot during the adjustment process, the contact between the transmission block and the lower membrane cover will cause the flow channel to be reduced or even cut off, and the diaphragm cannot feel the temperature of the backflow gas in time. Therefore, it is an effective way to meet the continuous improvement of the refrigeration system by designing and inventing a throttling throttling of the liquid channel, improving the structure of the transmission block to ensure the gas flow area, and having a certain vibration reduction function.

Contents of the invention

In order to improve the throttling effect and structural stability of the air conditioner refrigerant throttle valve, the object of the present invention is to provide an air conditioner two-way throttle valve with thrice throttling and vibration damping functions.

The technical scheme adopted in the present invention is:

A sealing steel ball is installed in the center hole of the upper membrane cover at the top of the valve, a diaphragm is installed between the upper membrane cover and the lower membrane cover, and a transmission block is installed under the diaphragm, and the transmission block is connected in the lower membrane cover through the positioning circular plate of the transmission block. The first gap is formed between the bottom surface of the large end of the transmission block and the shoulder of the lower membrane cover, and the second gap is formed between the bottom surface of the small end of the transmission block and the positioning circular plate of the transmission block. The height of the second gap must be smaller than the first gap. The lower bottom surface of the block positioning circular plate is supported on the annular inner flange of the valve body. There is a liquid inlet, and a positioning hole is opened between the air outlet and the liquid inlet on the right side of the valve body. The first O-ring is installed between the upper part of the valve body and the lower port of the lower membrane cover, and the transmission rod is installed at the center of the valve body. The upper end of the transmission rod passes through the positioning circular plate of the transmission block and connects to the transmission block. The transmission rod is connected to the baffle below the position close to the air inlet and the air outlet. The second O-ring is installed under the baffle. The lower end of the transmission rod passes through the liquid outlet and is connected to In the notch of the conical spool, the adjustment spring is connected under the conical spool, and the circular ball pad is connected under the adjustment spring. The ball pad is connected to the adjustment seat through three steel balls evenly distributed on the left and right. The adjustment seat is located at the bottom of the valve body. below.

The first orifice is between the liquid outlet and the transmission rod. The channel formed by the conical valve core through the conical surface and the conical valve port of the valve body is the second orifice with adjustable opening. The liquid inlet There is a third throttle hole between the tapered spool.

The large end of the transmission block has more than the small end part of the ring, and two circles are opened inside and outside, and each circle is respectively opened with 6 evenly distributed holes. The diameter of the small end of the transmission block is smaller than the diameter of the inner hole of the lower membrane cover. 1/2, the center of the small end has a first groove for positioning the transmission rod, and a second groove is opened below the first groove, the diameter of the first groove is smaller than the second groove, and the center position of the transmission block positioning disc is The through hole of the transmission rod, the transmission rod passes through the through hole of the transmission rod and is connected with the first groove, and the same circumference of the positioning circular plate of the transmission block is provided with six circulation holes evenly distributed.

The beneficial effects that the present invention has are:

1) In the present invention, a throttling channel is added at both ends of the adjustable valve port of the liquid channel to realize three times of throttling, so that the valve port works in a low-pressure differential environment, and when used for two-way flow regulation, both forward and reverse The difference in pressure difference at the valve port is small, which overcomes the problem of difficult to achieve the balance of refrigeration capacity when the two-way flow is difficult, so this throttle valve is suitable for occasions that require two-way flow of refrigerant.

2) The structure of the spool is improved, and steel balls are added to fix it, reducing the spring friction during adjustment, which is beneficial to the working stability of the entire valve and reduces resonance interference.

3) The structure of the transmission block is improved. The diameter of the small end of the transmission block is less than 1/2 of the inner diameter of the lower membrane cover, and the diameter of the large end of the transmission block is also less than 1/2 of the diameter of the diaphragm. Due to the difference between the first gap and the second gap exists, and the height of the second gap is smaller than the first gap, so the small end of the maximum valve opening is in contact with the positioning circular plate of the transmission block, but not with the upper membrane cover, and how much is opened between the transmission block and the positioning circular plate of the transmission block A flow hole, which is beneficial to expand the flow area of the gas to the diaphragm, to ensure that the temperature of the diaphragm is more sufficient.

Description of drawings

Fig. 1 is a schematic diagram of the internal structure of the present invention.

Fig. 2 is a schematic diagram of the throttling throttling structure of the present invention.

Fig. 3 is a top view of the transmission block of the present invention.

Fig. 4 is a sectional view of the transmission block of the present invention.

Fig. 5 is a top view of the transmission block positioning circular plate of the present invention.

Fig. 6 is a structural schematic diagram of the steel ball of the adjustment seat of the present invention.

In the figure: 1. Sealing steel ball, 2. Upper membrane cover, 3. Lower membrane cover, 4. Diaphragm, 5. Transmission block, 6. Transmission block positioning circular plate, 7. First O-ring, 8. Valve Body, 9. Air inlet, 10. Air outlet, 11. Liquid outlet, 12. Liquid inlet, 13. Positioning hole, 14. Transmission rod, 15. Baffle, 16. Second O-ring, 17. Tapered spool, 18. Adjusting spring, 19. Ball pad, 20. Steel ball, 21. Adjusting seat, 22. The third O-ring, 23. The first orifice, 24, The second orifice, 25 .Third throttle hole, 26. Transmission rod through hole, 27. Flow hole, 28. First clearance, 29. Second clearance, 30. Big end, 31. Small end, 32. First groove, 33. Second groove, 34. hole, 35. annular inner flanging.

Detailed ways

The present invention will be further described below in conjunction with drawings and embodiments.

As shown in Figure 1 and Figure 6, a sealing steel ball 1 is installed in the center hole of the upper membrane cover 2 at the top of the valve in the present invention, a diaphragm 4 is installed between the upper membrane cover 2 and the lower membrane cover 3, and the diaphragm 4 is installed below The transmission block 5, the transmission block 5 is connected in the lower membrane cover 3 through the transmission block positioning circular plate 6, the first gap 28 is formed between the bottom surface of the big end 30 of the transmission block 5 and the shoulder of the lower membrane cover 3, the small end of the transmission block 5 The second gap 29 is formed between the bottom surface of 31 and the transmission block positioning disc 6, the height of the second gap 29 needs to be smaller than the first gap 28, and the lower bottom surface of the transmission block positioning disc 6 is supported on the annular inner flange 35 of the valve body 8 , the upper left side of the valve body 8 has an air inlet 9, the lower left side of the valve body 8 has a liquid outlet 11, the upper right side of the valve body 8 has an air outlet 10, and the lower right side of the valve body 8 has a liquid inlet 12, the valve There is a positioning hole 13 on the right side of the body 8 between the gas outlet (10) and the liquid inlet 12, the first O-ring 7 is installed between the upper part of the valve body 8 and the lower port of the lower membrane cover 3, and the center of the valve body 8 is installed The transmission rod 14, the upper end of the transmission rod 14 passes through the transmission block positioning circular plate 6 and is connected to the transmission block 5, the transmission rod 14 is connected to the baffle 15 below the position close to the air inlet 9 and the air outlet 10, and the second O-shaped is installed under the baffle 15 Ring 16, the lower end of the transmission rod 14 passes through the liquid outlet 11 and is connected to the notch of the conical spool 17, the lower end of the conical spool 17 is connected to the adjustment spring 18, and the lower end of the adjustment spring 18 is connected to the circular ball pad 19, the ball pad 19 The adjustment seat 21 is connected to the adjustment seat 21 through three steel balls 20 evenly distributed on the left and right sides, and the adjustment seat 21 is located at the bottom of the valve body 8 .

As shown in Figure 2, the first orifice 23 is between the liquid outlet 11 and the transmission rod 14, and the passage formed by the conical valve core 17 through the conical surface and the conical valve port of the valve body 8 is adjustable in opening degree. Adjusted second orifice 24, there is a third orifice 25 between the liquid inlet 12 and the tapered valve core 17, passing through the first orifice 23, the second orifice 24, the third orifice 25 Three throttling holes perform throttling multiple times to meet throttling and vibration reduction requirements.

As shown in Fig. 3, Fig. 4, and Fig. 5, the circular ring of the large end 30 of the transmission block 5 with more than the small end 31 is opened two circles inside and outside, and each circle is respectively opened with 6 holes evenly distributed. 34, providing a backflow gas channel for the diaphragm 4, the diameter of the small end 31 of the transmission block 5 is less than 1/2 of the diameter of the inner hole of the lower membrane cover 3, and the center of the small end 31 has a first groove 32 for positioning the transmission rod 14, The second groove 33 is arranged below the first groove 32, and the diameter of the first groove 32 is smaller than the second groove 33. The central position of the transmission block positioning circular plate 6 is the transmission rod through hole 26, and the transmission rod 14 passes through the transmission rod through hole. The hole 26 is connected to the first groove 32, and six circulation holes 27 are evenly distributed on the same circumference of the transmission block positioning circular plate 6, and the six circulation holes 27 ensure that the return gas can flow to the transmission block.

The working principle of the present invention is as follows:

When the valve works normally, the liquid refrigerant flows from the liquid inlet 12 to the liquid outlet 11, and the liquid outlet 11 is connected to the air conditioner evaporator, and the refrigerant returns to the air inlet 9 through the evaporator, and the air inlet 9 and The air outlet 10 is connected, and the air outlet 10 is connected to the air conditioner compressor. The refrigerant returns to the liquid inlet 12 after passing through the compressor and the condenser. In this way, after the refrigerant flows into the liquid inlet 12, it passes through the third orifice 25 After the first throttling effect, it enters the cavity where the conical valve core 17 is located, and then performs the second throttling from the second throttling hole 24, and the second throttling effect can be adjusted through the adjustment seat 21 at the bottom of the valve body 8 to adjust the size of the throttling effect, followed by throttling for the third time through the first throttling hole 23. After throttling throttling, the refrigerant flow in the entire cycle tends to be stable without obvious fluctuations. After throttling, the refrigerant flows out of the liquid outlet 11 into the air conditioner evaporator, and the refrigerant coming in from the air inlet 9 enters the air box head through the circulation hole 27 of the positioning circular plate 6 of the transmission block, and acts on the diaphragm 4, the air box head itself will generate a downward force due to the influence of the external environment temperature. This downward force interacts with the upward force generated by the refrigerant entering the air inlet 9. The pressure difference between the two forces will eventually be Downward, this downward force acts on the transmission block 5 through the diaphragm 4, and the transmission block 5 transmits the force to the transmission rod 14, and the transmission rod 14 finally acts on the cone valve core 17, and the cone valve The core 17 changes the size of the second throttle hole 24 to adjust the flow of refrigerant. The lower part of the conical valve core 17 is under the force of the adjustment spring 18. Three steel balls 20 evenly distributed on the left and right are installed on the ball pad 19 and the adjustment seat. 21, when the adjustment seat 21 is adjusted, it will rotate and drive the adjustment spring 18 to rotate. When the steel ball 20 is not installed, the adjustment spring 18 will deform clockwise or counterclockwise while the steel ball 20 is not installed. After installing three steel balls 20 , the friction force between the adjustment seat 21 and the adjustment spring 18 is transferred to the steel ball 20, and the steel ball 20 can rotate to offset the friction force between the adjustment seat 21 and the adjustment spring 18, and the adjustment spring 18 will not move smoothly when it deforms up and down. Clockwise or counterclockwise deformation, in addition, in the whole working process, because of the designed size of the transmission block positioning circular plate 6, even if the valve port is fully opened, the transmission block positioning circular plate 6 will not touch the lower membrane cover 3. The problem that the valve port cannot be fully opened under high temperature environment, in addition, there are many small holes on the positioning disc 6 of the transmission block and the transmission block 5, which can ensure the smooth circulation of the refrigerant, and the air pressure can fully act on the diaphragm 4.

Claims (3)

1. An air-conditioning two-way throttle valve with three throttling and vibration reduction functions, characterized in that: a sealing steel ball (1) is installed in the center hole of the upper membrane cover (2) at the top of the valve, and the upper membrane cover (2) A diaphragm (4) is installed between the lower membrane cover (3), and a transmission block (5) is installed under the diaphragm (4). The transmission block (5) is connected to the lower membrane cover (3) through the transmission block positioning disc (6). ), the first gap (28) is formed between the bottom surface of the big end (30) of the transmission block (5) and the shoulder of the lower membrane cover (3), and the bottom surface of the small end (31) of the transmission block (5) is positioned with the transmission block A second gap (29) is formed between the circular plates (6), the height of the second gap (29) must be smaller than the first gap (28), and the bottom surface of the transmission block positioning circular plate (6) is supported on the valve body (8). On the annular inner flange (35), there is an air inlet (9) on the upper left side of the valve body (8), a liquid outlet (11) on the lower left side of the valve body (8), and a liquid outlet (11) on the upper right side of the valve body (8). The air outlet (10), the lower right side of the valve body (8) has a liquid inlet (12), and the right side of the valve body (8) has a positioning hole between the air outlet (10) and the liquid inlet (12) ( 13), the first O-ring (7) is installed between the upper part of the valve body (8) and the lower port of the lower membrane cover (3), and the transmission rod (14) is installed at the center of the valve body (8), and the upper end of the transmission rod (14) Pass through the transmission block positioning circular plate (6) and connect to the transmission block (5), the transmission rod (14) is close to the position of the air inlet (9) and the air outlet (10) and connects to the baffle (15), the baffle (15) The second O-ring (16) is installed below, the lower end of the transmission rod (14) passes through the liquid outlet (11) and is connected to the notch of the conical spool (17), and the lower end of the conical spool (17) is connected to the adjustment spring ( 18), the circular ball cushion (19) is connected under the adjustment spring (18), the ball cushion (19) is connected to the adjustment seat (21) through three evenly distributed steel balls (20), and the adjustment seat (21) is located on The bottom of the valve body (8). 2. An air-conditioning two-way throttle valve with three throttling and vibration damping functions according to claim 1, characterized in that: between the liquid outlet (11) and the transmission rod (14) is a first The orifice (23), the channel formed by the conical valve core (17) through the conical surface and the conical valve port of the valve body (8) is the second orifice (24) with adjustable opening, and the liquid inlet (12 ) and the cone spool (17) have a third throttle hole (25). 3. An air-conditioning two-way throttle valve with three throttling and vibration damping functions according to claim 1, characterized in that: the big end (30) of the transmission block (5) has more than the small end (31 ) part of the ring is opened with two inner and outer circles, and each circle is respectively opened with 6 evenly distributed holes (34), the diameter of the small end (31) of the transmission block (5) is smaller than the diameter of the inner hole of the lower membrane cover (3) 1/2, the center of the small end (31) has a first groove (32) for positioning the transmission rod (14), and a second groove (33) is opened below the first groove (32). The diameter of the groove (32) is smaller than that of the second groove (33), and the center position of the transmission block positioning disc (6) is the transmission rod through hole (26), and the transmission rod (14) passes through the transmission rod through hole (26) and the The first groove (32) is connected with the first groove (32), and six circulation holes (27) evenly distributed are opened on the same circumference of the transmission block positioning circular plate (6).