Peristaltic pump

Abstract

The utility model discloses a peristaltic pump which comprises a motor, a roller disc assembly, a rear cover, a hose, a liquid inlet channel, an air inlet channel and a check valve. The liquid inlet channel is used for leading out liquid in the liquid storage bag, one end of the hose is connected with the liquid inlet channel, and the other end of the hose is used for discharging the liquid; the roller disc assembly and the hose are both located in the rear cover, the motor drives the roller disc assembly to rotate, and the roller disc assembly is matched with the inner wall of the side face of the rear cover to extrude the hose. The air inlet channel is used for inflating the liquid storage bag, and the check valve is arranged in the air inlet channel. According to the peristaltic pump, the liquid storage bag is inflated while liquid is pumped, and residual liquid in the liquid storage bag can still be fully pumped along with reduction of the liquid in the liquid storage bag.

Description

TECHNICAL FIELD

[0001] The utility model relates to a peristaltic pump and belongs to the technical field of household appliances. BACKGROUND

[0002] With the development of science and technology and the progress of the times, more and more intelligent appliances have entered people's lives, and dishwashers are one of them. The use of dishwashers greatly facilitates people's dining life and saves a lot of manpower and time. At present, there are many specifications and types of dishwashers on the market, mainly including table type, independent type, embedded type, sink type and integrated type. In terms of adding detergent, manual addition is the main method. In order to pursue a high-quality life and save time, the automatic detergent addition method will gradually replace the manual detergent addition method. The peristaltic pump liquid adding system is a common one in the automatic detergent addition method.

[0003] However, in the existing peristaltic pump technical scheme, after the peristaltic pump works for a long time, as the liquid in the liquid storage bag decreases, the internal pressure of the liquid storage bag increases, which makes it difficult for the peristaltic pump to suck liquid, and the residual liquid in the liquid storage bag cannot be utilized, causing waste. UTILITY MODEL CONTENTS

[0004] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide a peristaltic pump that inflates the liquid storage bag while pumping liquid. As the liquid in the liquid storage bag decreases, the peristaltic pump can still fully extract the residual liquid in the liquid storage bag.

[0005] To solve the above technical problems, the technical scheme of the utility model is as follows:

[0006] A peristaltic pump, comprising a motor, a roller disc assembly, a rear cover, a hose, a liquid inlet channel, an air inlet channel and a check valve;

[0007] The liquid inlet channel is used to guide the liquid in the liquid storage bag out, one end of the hose is connected to the liquid inlet channel, and the other end of the hose is used to discharge liquid;

[0008] The roller disc assembly and the hose are both located in the rear cover, the motor drives the roller disc assembly to rotate, and the roller disc assembly cooperates with the inner wall of the side surface of the rear cover to extrude the hose;

[0009] The air inlet channel is used to inflate the liquid storage bag, and the check valve is arranged in the air inlet channel.

[0010] Further, a front cover is further included, buckles are arranged on the rear cover, and the rear cover and the front cover are connected through the buckles.

[0011] Further, the liquid inlet channel and the air inlet channel are arranged on the front cover, and the top of the liquid inlet channel and the air inlet channel is respectively provided with a needle.

[0012] Further, one end of the hose is provided with a liquid inlet, and the liquid inlet is inserted into the liquid inlet channel.

[0013] Further, the connection part of the liquid inlet and the liquid inlet channel is provided with a sealing ring.

[0014] Further, the bottom of the front cover is provided with an upper groove for fixing the liquid inlet and the liquid outlet, and the inner wall of the bottom of the rear cover is provided with a lower groove for fixing the liquid inlet and the liquid outlet.

[0015] Further, the check valve is a duckbill valve.

[0016] Further, the bottom of the air inlet channel abuts against the top of the air inlet, the check valve is arranged in the air inlet channel, the bottom of the check valve is provided with a gasket, and the gasket abuts against the top of the air inlet.

[0017] Further, the radial outer periphery of the gasket is provided with a semicircular protrusion, and the inner wall of the bottom of the air inlet channel is provided with a fitting groove matched with the semicircular protrusion.

[0018] Further, the top surface of the gasket is provided with a triangular protrusion for sealing the connection part of the gasket and the air inlet channel.

[0019] By adopting the above technical scheme, the inflation structure is added in the existing peristaltic pump structure, when the liquid is drawn from the liquid storage bag, the air inlet channel can be used to inflate the liquid storage bag, so that the air pressure balance in the liquid storage bag is adjusted, the liquid can be better drawn from the liquid storage bag, and as the liquid in the liquid storage bag is continuously reduced, the residual liquid in the liquid storage bag can still be fully drawn. The check valve is arranged in the air inlet channel, and the liquid can be effectively prevented from leaking from the air inlet channel. The structure is simple and practical, and the liquid drawing effect is better. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a front view of the peristaltic pump of the utility model;

[0021] Figure 2 It is an exploded view of Figure 1

[0022] Figure 3 It is a structure schematic view of the buckle of the utility model;

[0023] Figure 4 It is a structure schematic view of the upper groove of the utility model;​

[0024] Figure 5 The cooperation schematic view of the soft tube and the front cover of the utility model;

[0025] Figure 6 The structure schematic view of the lower groove of the utility model;

[0026] Figure 7 The cooperation schematic view of the soft tube and the rear cover of the utility model;

[0027] Figure 8 The internal structure schematic view of the peristaltic pump of the utility model;

[0028] Figure 9 The A part of the utility model is enlarged view; Figure 8

[0029] Figure 10 The exploded schematic view of the front cover, duckbill valve and gasket of the utility model;

[0030] Figure 11 The flow direction schematic view of the gas and liquid of the utility model;

[0031] Figure 12 The structure schematic view of the roller disc assembly of the utility model. DETAILED DESCRIPTION

[0032] In order to make the content of the utility model more easily be clearly understood, the utility model is further explained in detail below according to specific embodiments and in conjunction with the drawings.

[0033] As shown in Figure 1 , 2 , 11, the embodiment provides a peristaltic pump, which comprises a rear cover 61, a front cover 62, a motor 71, a roller disc assembly 72, a soft tube 1, a liquid inlet channel 2, a gas inlet channel 3 and a check valve 4. The rear cover 61 and the front cover 62 constitute a pump body, the liquid inlet channel 2 and the gas inlet channel 3 are installed on the front cover 62, the top of the liquid inlet channel 2 and the gas inlet channel 3 is respectively provided with a needle 8, and the liquid inlet channel 2 and the gas inlet channel 3 are communicated with a liquid storage bag 5 through the needle 8. The liquid inlet channel 2 is used for guiding the liquid in the liquid storage bag 5 out, the soft tube 1 is installed in the rear cover 61, one end of the soft tube 1 is connected with the liquid inlet channel 2, and the other end of the soft tube 1 is used for discharging the liquid. The motor 71 drives the roller disc assembly 72 to rotate and extrude the soft tube 1, so that a pressure difference is formed to realize liquid suction and discharge. The gas inlet channel 3 is used for inflating the liquid storage bag 5, the check valve 4 is installed in the gas inlet channel 3, when the liquid in the liquid storage bag 5 is extracted, the liquid storage bag 5 can be inflated through the gas inlet 612 at the bottom of the pump body, the gas enters the liquid storage bag 5 through the check valve 4 after passing through the gas inlet channel 3, the gas pressure balance in the liquid storage bag 5 is adjusted, the liquid can be better transported, and the residual liquid in the liquid storage bag 5 can be fully extracted along with the continuous reduction of the liquid. ​

[0034] As Figure 3 shown, the liquid inlet channel 2 and the air inlet channel 3 of the embodiment are arranged on the front cover 62. The front cover 62 and the rear cover 61 are connected by a detachable structure. A pair of buckles 6111 are arranged on the rear cover 61, and the rear cover 61 is connected and fixed with the front cover 62 by the buckles 6111.

[0035] As Figure 2 , 12 shown, the roller disc assembly 72 of the embodiment is located in the rear cover 61. The roller disc assembly 72 includes a roller shaft 723, a roller 721 and a roller disc 722. The roller shaft 723 is smeared with a certain amount of lubricating grease, which is inserted into the roller 721, and then clamped into the roller disc 722. The roller disc 722 is connected with the motor shaft 71 of the motor 71. The motor 71 is fixed on the front cover 62 by self-tapping screws. The motor 71 is used to drive the rotation of the roller disc assembly 72. When the roller disc assembly 72 rotates, the roller 721 cooperates with the inner wall of the side of the rear cover 61 to extrude the hose 1.

[0036] As Figure 2 shown, one end of the hose 1 of the embodiment is provided with a liquid inlet 11, which is inserted into the liquid inlet channel 2. A sealing ring 111 is arranged at the connection between the liquid inlet 11 and the liquid inlet channel 2. The other end of the hose 1 is provided with a liquid outlet 12.

[0037] As Figures 4 to 7 shown, the bottom of the front cover 62 of the embodiment is provided with an upper groove 621 for fixing the liquid inlet 11 and the liquid outlet 12. The inner wall of the bottom of the rear cover 61 is provided with a lower groove 611 for fixing the liquid inlet 11 and the liquid outlet 12. After the front cover 62 and the rear cover 61 are assembled in place, the liquid inlet 11 and the liquid outlet 12 can be clamped between the upper groove 621 and the lower groove 611, respectively. The liquid inlet 11 is provided with a first protruding ring 112, which is clamped between the gaps of the two sets of upper and lower grooves, and limits the liquid inlet 11 in the horizontal direction. The liquid outlet 12 is provided with a second protruding ring 121, which is also clamped between the gaps of the two sets of upper and lower grooves, and limits the liquid outlet 12 in the horizontal direction.

[0038] As Figure 8 , 9 shown, the check valve 4 of the embodiment adopts a duckbill valve. The bottom inner wall of the rear cover 61 is provided with an air inlet 612, which adopts a cylindrical stepped structure. On the one hand, it is convenient for the inflator to inflate. On the other hand, it prevents the gasket 9 from falling off and supports the gasket 9. After the front cover 62 and the rear cover 61 are assembled in place, the bottom of the air inlet channel 3 abuts against the top of the air inlet 612. The check valve 4 is arranged in the air inlet channel 3. The bottom of the check valve 4 is provided with a gasket 9, which abuts against the top of the air inlet 612.

[0039] AsFigure 10 As shown, the gasket 9 in this embodiment has a semi-circular protrusion 91 on its radial outer periphery, and an assembly groove 31 is provided on the bottom inner wall of the air intake channel 3. The gasket 9 is fixed by the cooperation between the semi-circular protrusion 91 of the gasket 9 and the assembly groove 31 of the air intake channel 3.

[0040] like Figure 10 As shown, the top surface of the gasket 9 in this embodiment is provided with a triangular protrusion 92 for sealing the connection between the gasket 9 and the air inlet channel 3. The triangular protrusion 92 of the gasket 9 partially squeezes the check valve 4 to seal the air inlet channel 3, preventing the liquid in the liquid storage bag 5 from leaking out from the air inlet 612.

[0041] The specific embodiments described above further illustrate the technical problems, technical solutions, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A peristaltic pump characterized by: It includes motor (71), roller disc assembly (72), rear cover (61), hose (1), liquid inlet channel (2), air inlet channel (3) and check valve (4); The liquid inlet channel (2) is used for guiding the liquid in the liquid storage bag (5), one end of the hose (1) is connected with the liquid inlet channel (2), and the other end of the hose (1) is used for discharging the liquid; The roller disc assembly (72) and the hose (1) are located in the rear cover (61), the motor (71) drives the roller disc assembly (72) to rotate, and the roller disc assembly (72) cooperates with the side inner wall of the rear cover (61) to extrude the hose (1); The air inlet channel (3) is used for inflating the liquid storage bag (5), and the check valve (4) is arranged in the air inlet channel (3).

2. The peristaltic pump of claim 1, wherein: It also includes a front cover (62), the rear cover (61) is provided with a buckle (6111), and the rear cover (61) is connected with the front cover (62) through the buckle (6111).

3. The peristaltic pump of claim 2, wherein: The liquid inlet channel (2) and the air inlet channel (3) are arranged on the front cover (62), the top of the liquid inlet channel (2) and the air inlet channel (3) is respectively provided with a needle (8), and the liquid inlet channel (2) and the air inlet channel (3) are communicated with the liquid storage bag (5) through the needle (8).

4. The peristaltic pump of claim 3, wherein: One end of the hose (1) is provided with a liquid inlet (11), the liquid inlet (11) is inserted into the liquid inlet channel (2), and the other end of the hose (1) is provided with a liquid outlet (12).

5. The peristaltic pump of claim 4, wherein: The connection between the liquid inlet (11) and the liquid inlet channel (2) is provided with a sealing ring (111).

6. The peristaltic pump of claim 4, wherein: The bottom of the front cover (62) is provided with an upper groove (621) for fixing the liquid inlet (11) and the liquid outlet (12), and the inner wall of the bottom of the rear cover (61) is provided with a lower groove (611) for fixing the liquid inlet (11) and the liquid outlet (12).

7. The peristaltic pump of claim 1, wherein: The check valve (4) is a duckbill valve.

8. The peristaltic pump of claim 2, wherein: The bottom inner wall of the rear cover (61) is provided with an air inlet (612), the bottom of the air inlet channel (3) abuts against the top of the air inlet (612), the check valve (4) is arranged in the air inlet channel (3), the bottom of the check valve (4) is provided with a gasket (9), and the gasket (9) abuts against the top of the air inlet (612).

9. The peristaltic pump of claim 8, wherein: The radial outer periphery of the gasket (9) is provided with a semicircular protrusion (91), and the bottom inner wall of the air inlet channel (3) is provided with a fitting groove (31) matched with the semicircular protrusion (91).

10. The peristaltic pump of claim 8, wherein: The top surface of the gasket (9) is provided with a triangular protrusion (92) for sealing the connection between the gasket (9) and the air inlet channel (3).

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