阅读说明：本技术 一种螺杆真空泵的泵壳 (Pump case of screw vacuum pump ) 是由 张晶晶 于 2019-11-29 设计创作，主要内容包括：本发明一种螺杆真空泵的泵壳,包括：壳体,所述壳体内设置有泵腔,所述泵腔内平行设置有第一螺杆和第二螺杆,所述壳体内设置有冷却管,所述壳体底端设置进气管,所述壳体顶端设置有排气管。本发明的目的在于提供一种散热效率高的螺杆真空泵的泵壳。(The invention relates to a pump shell of a screw vacuum pump, which comprises: the cooling device comprises a shell, wherein a pump cavity is arranged in the shell, a first screw and a second screw are arranged in the pump cavity in parallel, a cooling pipe is arranged in the shell, an air inlet pipe is arranged at the bottom end of the shell, and an exhaust pipe is arranged at the top end of the shell. The invention aims to provide a pump shell of a screw vacuum pump with high heat dissipation efficiency.)

1. A pump casing for a screw vacuum pump, comprising: the improved cooling device comprises a shell (1), wherein a pump cavity (2) is arranged in the shell (1), a first screw (3) and a second screw (4) are arranged in the pump cavity (2) in parallel, a cooling pipe (5) is arranged in the shell (1), an air inlet pipe (6) is arranged at the bottom end of the shell (1), and an exhaust pipe (7) is arranged at the top end of the shell (1).

2. Pump casing of a screw vacuum pump according to claim 1, characterized in that a drive device is arranged on the casing (1), which drive device comprises:

a first groove body (8) arranged on the outer wall of the shell (1), the first groove body (8) wraps the left ends of the first screw rod (3) and the second screw rod (4), a motor (9) is arranged on the inner wall of the first groove body (8), an output shaft (10) of the motor (9) is connected with the left end of the first screw rod (3),

a first gear (11) arranged at the left end of the first screw (3), the first gear (11) being outside the housing (1),

and the second gear (12) is arranged at the right end of the second screw rod (4), the second gear (12) is positioned outside the shell (1), and the first gear (11) is meshed with the second gear (12).

3. A pump casing of a screw vacuum pump according to claim 2, characterized in that a second groove body (13) is arranged on the outer wall of the casing (1), and the second groove body (13) wraps the first gear (11) and the second gear (12).

4. Pump housing of a screw vacuum pump according to claim 1, characterized in that a base (14) is arranged below the housing (1), and the bottom end of the housing (1) is connected with the base (14) through a support rod (15).

5. A pump casing of a screw vacuum pump according to claim 3, further comprising a circulation heat sink, the circulation heat sink comprising:

the transmission case (16) is arranged on the outer wall of the second groove body (13), a supporting plate (17) is arranged in the transmission case (16), a first through hole (18) is formed in the supporting plate (17), a rotating shaft (19) is arranged in the first through hole (18), one end of the rotating shaft (19) is fixedly connected with a first chain wheel (20), a second chain wheel (21) is arranged at the right end of the second screw rod (4), the first chain wheel (20) is connected with the second chain wheel (21) through a chain (22), and the chain (22) penetrates through the wall surface of the transmission case (16);

one end of the rotating rod (23) is fixedly connected with one end, far away from the first chain wheel (20), of the rotating shaft (19), a sliding column (29) is arranged at the other end of the rotating rod (23), the rotating rod (23) is perpendicular to the rotating shaft (19), a first sliding groove (24) in the horizontal direction is formed in the upper end of the supporting plate (17), a sliding rod (25) is arranged in the first sliding groove (24), and the sliding rod (25) can reciprocate left and right in the first sliding groove (24);

one end of the first connecting rod (26) is hinged with the right end of the sliding rod (25), the other end of the first connecting rod (26) is hinged with one end of a second connecting rod (27), the other end of the second connecting rod (27) is hinged with the bottom end of the supporting plate (17), a second sliding groove (28) is formed in the second connecting rod (27), and the sliding column (29) can reciprocate in the second sliding groove (28);

the cylinder body (30) is arranged above the shell (1), a piston (31) is arranged in the cylinder body (30), the piston (31) can reciprocate in the cylinder body (30), a second through hole (32) is formed in the right end of the cylinder body (30), and the left end of the sliding rod (25) penetrates through the second through hole (32) to be connected with the piston (31);

water tank (33), set up cylinder body (30) top, first connecting pipe (34) one end with cylinder body (30) left end intercommunication, first connecting pipe (34) other end with water tank (33) intercommunication, second connecting pipe (35) one end with cylinder body (30) left end intercommunication, second connecting pipe (35) other end with the entrance point intercommunication of cooling tube (5), wet return (36) one end with the exit end intercommunication of cooling tube (5), wet return (36) other end with water tank (33) intercommunication.

6. Pump housing of a screw vacuum pump according to claim 5, characterized in that a first non-return valve (37) is arranged on the first connecting pipe (34) and a second non-return valve (38) is arranged on the second connecting pipe (35).

7. Pump housing of a screw vacuum pump according to claim 5, characterized in that a stop block (39) is arranged on the end of the slide column (29) remote from the rotary lever (23).

8. Pump housing for a screw vacuum pump according to claim 5, characterized in that the water tank (33) is provided with a water inlet pipe (40).

9. A pump casing of a screw vacuum pump according to claim 8, characterized in that the inlet pipe (40) is provided with a sealing cover (41), and the sealing cover (41) is in threaded connection with the outer wall of the inlet pipe (40).

10. The pump shell of the screw vacuum pump, as recited in claim 5, characterized in that a third groove body (42) is arranged on the outer wall of the water tank (33), a temperature sensor (43) is arranged on the inner wall of the water tank (33), a processor (44) is arranged in the third groove body (42), a display (45) is arranged on the outer wall of the third groove body (42), the temperature sensor (43) is electrically connected with the processor (44), the processor (44) is electrically connected with the display (45), a control circuit is arranged in the processor (44),

the control circuit includes: a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a diode D1, a diode D2, a transistor Q, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, an operational amplifier U1 and an operational amplifier U2;

the output end of the temperature sensor (43) is connected with one end of the resistor R1, the other end of the resistor R1 is connected with one end of the resistor R3, the other end of the resistor R3 is connected with the anode of the diode D2, the cathode of the diode D2 is connected with the non-inverting input end of the operational amplifier U1, and the capacitor C1 is connected in parallel at two ends of the resistor R3;

one end of the resistor R2 is connected with the output end of the temperature sensor (43), the other end of the resistor R2 is respectively connected with the anode of the diode D1 and one end of the resistor R5, the cathode of the diode D1 is grounded, the other end of the resistor R5 is connected with the inverting input end of the operational amplifier U1, and the two ends of the resistor R5 are connected with the capacitor C3 in parallel;

one end of the resistor R4 is connected with the anode of the diode D2, the other end of the resistor R4 is connected with the collector end of the transistor Q, one end of the resistor R6 is connected with the signal output end of the operational amplifier U1, the other end of the resistor R6 is connected with the base end of the transistor Q, the emitter end of the transistor Q is connected with one end of the resistor R7, the other end of the resistor R7 is connected with the inverting input end of the operational amplifier U2, one end of the resistor R8 is connected with the signal output end of the operational amplifier U1, the other end of the resistor R8 is connected with the inverting input end of the operational amplifier U2, the signal output end of the operational amplifier U2 is connected with the input end of the display (45), and the two ends of the resistor R8 are connected in parallel with the capacitor C4.

Technical Field

The invention belongs to the technical field of vacuum pumps, and particularly relates to a pump shell of a screw vacuum pump.

Background

The screw vacuum pump is an air pumping device which utilizes a pair of screws to synchronously rotate in a high speed and reverse direction in a pump shell to generate air suction and exhaust functions, is a renewal product of an oil seal type vacuum pump, can pump out gas occasions containing a large amount of water vapor and a small amount of dust, and is widely applied to the fields of enterprises with higher requirements on clean vacuum, such as domestic pharmacy, chemical industry, semiconductors and the like. Because a large amount of heat is still in the steam, and meanwhile, the high-speed rotation of the screw rod can generate heat, the temperature in the pump is increased, the heat dissipation efficiency of the conventional screw pump vacuum pump is low, and the normal work of the screw pump vacuum pump is influenced.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the problem of low heat dissipation efficiency of the screw vacuum pump in the prior art.

Therefore, the technical scheme is that the pump shell of the screw vacuum pump comprises: the cooling device comprises a shell, wherein a pump cavity is arranged in the shell, a first screw and a second screw are arranged in the pump cavity in parallel, a cooling pipe is arranged in the shell, an air inlet pipe is arranged at the bottom end of the shell, and an exhaust pipe is arranged at the top end of the shell.

Preferably, a driving device is disposed on the housing, and the driving device includes:

a first groove body arranged on the outer wall of the shell, the first groove body wraps the left ends of the first screw rod and the second screw rod, a motor is arranged on the inner wall of the first groove body, an output shaft of the motor is connected with the left end of the first screw rod,

a first gear disposed at a left end of the first screw, the first gear being outside the housing,

the second gear is arranged at the right end of the second screw rod, the second gear is positioned outside the shell, and the first gear is meshed with the second gear.

Preferably, a second groove body is arranged on the outer wall of the shell, and the first gear and the second gear are wrapped by the second groove body.

Preferably, a base is arranged below the shell, and the bottom end of the shell is connected with the base through a support rod.

Preferably, the heat radiator further comprises a circulating heat radiator, and the circulating heat radiator comprises:

the transmission case is arranged on the outer wall of the second groove body, a supporting plate is arranged in the transmission case, a first through hole is formed in the supporting plate, a rotating shaft is arranged in the first through hole, one end of the rotating shaft is fixedly connected with a first chain wheel, a second chain wheel is arranged at the right end of the second screw rod, the first chain wheel is connected with the second chain wheel through a chain, and the chain penetrates through the wall surface of the transmission case;

one end of the rotating rod is fixedly connected with one end of the rotating shaft, which is far away from the first chain wheel, the other end of the rotating rod is provided with a sliding column, the rotating rod is vertical to the rotating shaft, the upper end of the supporting plate is provided with a first sliding groove in the horizontal direction, a sliding rod is arranged in the first sliding groove, and the sliding rod can reciprocate left and right in the first sliding groove;

one end of the first connecting rod is hinged with the right end of the sliding rod, the other end of the first connecting rod is hinged with one end of the second connecting rod, the other end of the second connecting rod is hinged with the bottom end of the supporting plate, a second sliding groove is formed in the second connecting rod, and the sliding column can reciprocate in the second sliding groove;

the cylinder body is arranged above the shell, a piston is arranged in the cylinder body and can reciprocate in the cylinder body, a second through hole is formed in the right end of the cylinder body, and the left end of the sliding rod penetrates through the second through hole and is connected with the piston;

the water tank sets up the cylinder body top, first connecting pipe one end with the cylinder body left end intercommunication, the first connecting pipe other end with the water tank intercommunication, second connecting pipe one end with the cylinder body left end intercommunication, the second connecting pipe other end with the entrance point intercommunication of cooling tube, wet return one end with the exit end intercommunication of cooling tube, the wet return other end with the water tank intercommunication.

Preferably, a first one-way valve is arranged on the first connecting pipe, and a second one-way valve is arranged on the second connecting pipe.

Preferably, one end of the sliding column, which is far away from the rotating rod, is provided with a limiting block.

Preferably, the water tank is provided with a water inlet pipe.

Preferably, a sealing cover is arranged on the water inlet pipe and is in threaded connection with the outer wall of the water inlet pipe.

Preferably, a third groove body is arranged on the outer wall of the water tank, a temperature sensor is arranged on the inner wall of the water tank, a processor is arranged in the third groove body, a display is arranged on the outer wall of the third groove body, the temperature sensor is electrically connected with the processor, the processor is electrically connected with the display, a control circuit is arranged in the processor,

the control circuit includes: a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a diode D1, a diode D2, a transistor Q, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, an operational amplifier U1 and an operational amplifier U2;

the output end of the temperature sensor is connected with one end of the resistor R1, the other end of the resistor R1 is connected with one end of the resistor R3, the other end of the resistor R3 is connected with the anode of the diode D2, the cathode of the diode D2 is connected with the non-inverting input end of the operational amplifier U1, and the two ends of the resistor R3 are connected with the capacitor C1 in parallel;

one end of the resistor R2 is connected with the output end of the temperature sensor, the other end of the resistor R2 is respectively connected with the anode of the diode D1 and one end of the resistor R5, the cathode of the diode D1 is grounded, the other end of the resistor R5 is connected with the inverting input end of the operational amplifier U1, and the two ends of the resistor R5 are connected with the capacitor C3 in parallel;

one end of the resistor R4 is connected to the anode of the diode D2, the other end of the resistor R4 is connected to the collector of the transistor Q, one end of the resistor R6 is connected to the signal output end of the operational amplifier U1, the other end of the resistor R6 is connected to the base of the transistor Q, the emitter of the transistor Q is connected to one end of the resistor R7, the other end of the resistor R7 is connected to the inverting input end of the operational amplifier U2, one end of the resistor R8 is connected to the signal output end of the operational amplifier U1, the other end of the resistor R8 is connected to the inverting input end of the operational amplifier U2, the signal output end of the operational amplifier U2 is connected to the input end of the display, and the two ends of the resistor R8 are connected in parallel to the capacitor C4.

The technical scheme of the invention has the following advantages: the invention relates to a pump shell of a screw vacuum pump, which comprises: the cooling device comprises a shell, wherein a pump cavity is arranged in the shell, a first screw and a second screw are arranged in the pump cavity in parallel, a cooling pipe is arranged in the shell, an air inlet pipe is arranged at the bottom end of the shell, and an exhaust pipe is arranged at the top end of the shell. The first screw rod and the second screw rod in the shell rotate reversely at high speed, water vapor is sucked from the air inlet pipe and enters the pump cavity, cooling water is injected into the cooling pipe through the exhaust pipe, and cooling water can cool the shell, so that the temperature in the pump cavity is reduced, the heat dissipation efficiency is improved, and the screw vacuum pump can work at normal temperature.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an internal cross-sectional view of the present invention.

FIG. 3 is a schematic view showing the internal structure of the transmission case of the present invention.

Fig. 4 is a schematic structural diagram of the circulation heat dissipation device of the present invention.

Fig. 5 is a schematic structural diagram of the temperature monitoring device of the present invention.

FIG. 6 is a schematic diagram of a control circuit according to the present invention.

The drawings are numbered as follows: 1-shell, 2-pump cavity, 3-first screw, 4-second screw, 5-cooling pipe, 6-air inlet pipe, 7-exhaust pipe, 8-first groove body, 9-motor, 10-output shaft, 11-first gear, 12-second gear, 13-second groove body, 14-base, 15-support rod, 16-transmission box, 17-support plate, 18-first through hole, 19-rotating shaft, 20-first chain wheel, 21-second chain wheel, 22-chain, 23-rotating rod, 24-first sliding groove, 25-sliding rod, 26-first connecting rod, 27-second connecting rod, 28-second sliding groove, 29-sliding column, 30-cylinder body, 31-piston, 32-second through hole, 33-a water tank, 34-a first connecting pipe, 35-a second connecting pipe, 36-a water return pipe, 37-a first one-way valve, 38-a second one-way valve, 39-a limiting block, 40-a water inlet pipe, 41-a sealing cover, 42-a third groove body, 43-a temperature sensor, 44-a processor and 45-a display.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

An embodiment of the present invention provides a pump casing of a screw vacuum pump, as shown in fig. 1-2, including: the improved cooling device comprises a shell 1, wherein a pump cavity 2 is arranged in the shell 1, a first screw rod 3 and a second screw rod 4 are arranged in the pump cavity 2 in parallel, a cooling pipe 5 is arranged in the shell 1, an air inlet pipe 6 is arranged at the bottom end of the shell 1, and an exhaust pipe 7 is arranged at the top end of the shell 1.

The working principle and the beneficial technical effects of the technical scheme are as follows: high-speed reverse rotation of first screw rod 3 and second screw rod 4 in the casing 1 is in the pump chamber 2 with vapor from the intake pipe 6 inspiration, discharges through blast pipe 7, injects the cooling water in the cooling tube 5, and the cooling water can cool down casing 1 to reduce the temperature in the pump chamber 2, improved the radiating efficiency, make screw vacuum pump can work under normal temperature.

In one embodiment, a driving device is disposed on the housing 1, and the driving device includes:

a first groove body 8 arranged on the outer wall of the shell 1, the first groove body 8 wraps the left ends of the first screw rod 3 and the second screw rod 4, a motor 9 is arranged on the inner wall of the first groove body 8, an output shaft 10 of the motor 9 is connected with the left end of the first screw rod 3,

a first gear 11 arranged at the left end of the first screw rod 3, the first gear 11 being outside the housing 1,

and the second gear 12 is arranged at the right end of the second screw rod 4, the second gear 12 is positioned outside the shell 1, and the first gear 11 is meshed with the second gear 12.

The working principle and the beneficial technical effects of the technical scheme are as follows: the motor 9 in the first groove body 8 is started to drive the output shaft 10 to rotate, the output shaft 10 drives the first screw rod 3 to rotate, the first screw rod 3 drives the first gear 11 to rotate, the second screw rod 4 is driven to rotate reversely through the meshing of the first gear 11 and the second gear 12, and water vapor is sucked into the pump cavity 2 from the air inlet pipe 6 and discharged through the exhaust pipe 7 through the high-speed reverse rotation of the first screw rod 3 and the second screw rod 4. The gear meshing transmission has high precision and stability, and can realize transmission of a gear ratio.

In one embodiment, a second groove body 13 is disposed on the outer wall of the housing 1, and the second groove body 13 wraps the first gear 11 and the second gear 12.

The working principle and the beneficial technical effects of the technical scheme are as follows: the second groove body 13 serves to protect the first gear 11 and the second gear 12.

In one embodiment, a base 14 is disposed below the housing 1, and the bottom end of the housing 1 is connected to the base 14 through a support rod 15.

The working principle and the beneficial technical effects of the technical scheme are as follows: the base 14 is provided with a mounting threaded hole, so that the screw vacuum pump can be conveniently fixed on equipment and also can be conveniently detached, and the support rod 15 plays a role in supporting the shell 1.

In one embodiment, as shown in fig. 3-4, further comprising a circulating heat sink, the circulating heat sink comprising:

the transmission case 16 is arranged on the outer wall of the second groove body 13, a support plate 17 is arranged in the transmission case 16, a first through hole 18 is formed in the support plate 17, a rotating shaft 19 is arranged in the first through hole 18, one end of the rotating shaft 19 is fixedly connected with a first chain wheel 20, a second chain wheel 21 is arranged at the right end of the second screw rod 4, the first chain wheel 20 is connected with the second chain wheel 21 through a chain 22, and the chain 22 penetrates through the wall surface of the transmission case 16;

one end of the rotating rod 23 is fixedly connected with one end of the rotating shaft 19 far away from the first chain wheel 20, a sliding column 29 is arranged at the other end of the rotating rod 23, the rotating rod 23 is perpendicular to the rotating shaft 19, a first sliding groove 24 in the horizontal direction is arranged at the upper end of the supporting plate 17, a sliding rod 25 is arranged in the first sliding groove 24, and the sliding rod 25 can reciprocate left and right in the first sliding groove 24;

one end of the first connecting rod 26 is hinged with the right end of the sliding rod 25, the other end of the first connecting rod 26 is hinged with one end of a second connecting rod 27, the other end of the second connecting rod 27 is hinged with the bottom end of the supporting plate 17, a second sliding groove 28 is arranged on the second connecting rod 27, and the sliding column 29 can reciprocate in the second sliding groove 28;

the cylinder body 30 is arranged above the shell 1, a piston 31 is arranged in the cylinder body 30, the piston 31 can reciprocate in the cylinder body 30, a second through hole 32 is formed in the right end of the cylinder body 30, and the left end of the sliding rod 25 penetrates through the second through hole 32 to be connected with the piston 31;

the water tank 33 is arranged on the top end of the cylinder body 30, one end of the first connecting pipe 34 is communicated with the left end of the cylinder body 30, the other end of the first connecting pipe 34 is communicated with the water tank 33, one end of the second connecting pipe 35 is communicated with the left end of the cylinder body 30, the other end of the second connecting pipe 35 is communicated with the inlet end of the cooling pipe 5, one end of the water return pipe 36 is communicated with the outlet end of the cooling pipe 5, and the other end of the water return pipe 36 is communicated with the water tank 33.

The technical scheme has the advantages that: when the vacuum pump is started, the second screw rod 4 rotates at a high speed to drive the second chain wheel 21 to rotate, the first chain wheel 20 is driven to rotate through the transmission of the chain 22, the first chain wheel 20 drives the rotating rod 23 to rotate on the plane of the supporting plate 17, the sliding column 29 is driven to slide in the second sliding groove 28, so that the second connecting rod 27 swings left and right to drive the first connecting rod 26 to move, the first connecting rod 26 drives the sliding rod 25 to move left and right along the first sliding groove 24, the sliding rod 25 passes through the second through hole 32 to drive the piston 31 to reciprocate left and right in the cylinder body 30, when the piston 31 moves left, the cooling water in the cylinder body 30 is pressed into the second connecting pipe 35 and then enters the cooling pipe 5 to cool and dissipate heat the shell, then the cooling water in the cooling pipe 5 flows back into the water tank 33 through the water return pipe 36, when the piston 32 moves right, the cylinder body 30 is at a negative pressure, and the water in the water tank 33 is sucked into the cylinder body 30, thereby forming a complete cooling circulation system. After the screw pump is started, the cooling circulation system is started at the same time, the screw pump stops running, the cooling circulation system also stops working, the waste of energy is reduced, the screw pump and the cooling circulation system can be driven by one motor, and the utilization efficiency of energy is improved; in addition, when the output power of the screw pump is increased, the rotating speed of the screw rod is accelerated, the heat in the screw rod is increased, and at the moment, the flowing speed of the cooling circulating liquid is also accelerated correspondingly, so that the heat dissipation capacity of the cooling circulating system is improved, a large amount of heat in the screw rod is taken away, when the output power of the screw rod is reduced, the rotating speed of the screw rod is reduced, the heat in the screw rod is also reduced, at the moment, the flowing speed of the cooling circulating liquid is also reduced correspondingly, the heat dissipation capacity of the cooling circulating system is reduced, the consumption of electric energy is reduced, and intelligent heat dissipation of the screw rod pump is realized.

In one embodiment, a first check valve 37 is disposed on the first connection pipe 34, and a second check valve 38 is disposed on the second connection pipe 35.

The technical scheme has the advantages that: the first check valve 37 allows the cooling water to flow only from the water tank 33 into the cylinder 30, and the second check valve 38 allows the cooling water to flow only from the cylinder 30 into the cooling pipe 5, thereby preventing the reverse flow of the cooling water.

In one embodiment, a stop block 39 is disposed on an end of the strut 29 remote from the rotating rod 23.

The technical scheme has the advantages that: the stopper 39 prevents the spool 29 from moving out of the second slide groove 28.

In one embodiment, the water tank 33 is provided with a water inlet pipe 40.

The technical scheme has the advantages that: the water tank 33 can be replenished with new cooling water through the water inlet pipe 40.

In one embodiment, the inlet tube 40 is provided with a sealing cover 41.

The technical scheme has the advantages that: the sealing cover 41 prevents dust or foreign substances from entering the water tank 33.

In one embodiment, the sealing cap 41 is screwed to the outer wall of the inlet pipe 40.

The technical scheme has the advantages that: the sealing cover 41 is in threaded connection with the outer wall of the water inlet pipe 40, so that the sealing cover is convenient to detach and mount.

In one embodiment, as shown in fig. 5 to 6, a third groove body 42 is disposed on an outer wall of the water tank 33, a temperature sensor 43 is disposed on an inner wall of the water tank 33, a processor 44 is disposed in the third groove body 42, a display 45 is disposed on an outer wall of the third groove body 42, the temperature sensor 43 is electrically connected to the processor 44, the processor 44 is electrically connected to the display 45, a control circuit is disposed in the processor 44,

the control circuit includes: a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a diode D1, a diode D2, a transistor Q, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, an operational amplifier U1 and an operational amplifier U2;

the output end of the temperature sensor 43 is connected to one end of the resistor R1, the other end of the resistor R1 is connected to one end of the resistor R3, the other end of the resistor R3 is connected to the anode of the diode D2, the cathode of the diode D2 is connected to the non-inverting input end of the operational amplifier U1, and the capacitor C1 is connected in parallel to two ends of the resistor R3;

one end of the resistor R2 is connected with the output end of the temperature sensor 43, the other end of the resistor R2 is respectively connected with the anode of the diode D1 and one end of the resistor R5, the cathode of the diode D1 is grounded, the other end of the resistor R5 is connected with the inverting input end of the operational amplifier U1, and the two ends of the resistor R5 are connected with the capacitor C3 in parallel;

one end of the resistor R4 is connected to the anode of the diode D2, the other end of the resistor R4 is connected to the collector of the transistor Q, one end of the resistor R6 is connected to the signal output end of the operational amplifier U1, the other end of the resistor R6 is connected to the base of the transistor Q, the emitter of the transistor Q is connected to one end of the resistor R7, the other end of the resistor R7 is connected to the inverting input end of the operational amplifier U2, one end of the resistor R8 is connected to the signal output end of the operational amplifier U1, the other end of the resistor R8 is connected to the inverting input end of the operational amplifier U2, the signal output end of the operational amplifier U2 is connected to the input end of the display 45, and the two ends of the resistor R8 are connected in parallel to the capacitor C4.

The working principle and the beneficial technical effects of the technical scheme are as follows: the temperature sensor 43 can detect the water temperature value in the water tank 33 and transmit the water temperature value to the processor 44, the processor 44 displays the temperature value through the display 45 after digital processing for the staff to watch, and when the water temperature in the water tank is too high, the staff can replace the cooling water in the water tank 33 in time; the control circuit in the processor has the advantages of simple structure, high sensitivity, easy implementation and high reliability.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.