CN111189300B

CN111189300B - High-low temperature all-in-one machine

Info

Publication number: CN111189300B
Application number: CN202010028081.1A
Authority: CN
Inventors: 徐国德
Original assignee: Taizhou Letter Power Electronic Equipment Co ltd
Current assignee: Zhejiang Dexinli Intelligent Technology Co ltd
Priority date: 2020-01-10
Filing date: 2020-01-10
Publication date: 2021-08-17
Anticipated expiration: 2040-01-10
Also published as: CN111189300A

Abstract

The invention discloses a high-low temperature all-in-one machine, relates to heat exchange equipment, and adopts the technical scheme that: the medium heating device comprises a box body, a medium inlet pipe, a medium outlet pipe, a compressor for refrigeration and a heating device for heating, wherein the compressor and the heating device are connected with an inner heat exchanger for heat exchange; the exhaust pipe is provided with an exhaust valve for controlling the on-off of the exhaust pipe. Even if the closing of the exhaust valve is delayed, the medium of the high-low temperature all-in-one machine cannot be discharged out of the circulating system to cause potential safety hazards; through setting up the kickboard, the medium in the exhaust pipe can not get into in the medium inlet pipe, has prevented scurrying each other of cold and hot medium.

Description

High-low temperature all-in-one machine

Technical Field

The invention relates to heat exchange equipment, in particular to a high-low temperature all-in-one machine.

Background

The high-low temperature all-in-one machine is heat exchange equipment integrating two functions of refrigeration and heating, the working principle of the high-low temperature all-in-one machine is similar to that of an air conditioner, but the range of refrigeration and heating is far larger than that of the air conditioner. The high-low temperature all-in-one machine is suitable for equipment which is connected with a reaction kettle for refrigeration and heating reaction in pharmaceutical, chemical and laboratory industries. The common refrigerants used for the high-temperature and low-temperature integrated machine comprise circulating water, water with the temperature of 7-20 ℃, saline water with the temperature of below 0 ℃, refrigerants with the temperature of below-40 ℃ and the like, and the common heating media comprise hot water, heat conducting oil and the like. The cooling medium and the heating medium can be collectively called as media.

The utility model discloses a chinese utility model patent that current grant bulletin number is CN208952527U discloses a high low temperature all-in-one, which comprises a housin, the refrigerant jar, compressor and evaporimeter, the compressor sets up the right side at the refrigerant jar, the upper right side of compressor is provided with the condenser, the condenser includes first box, thin aluminum pipe and a servo motor, the diapire of first box is passed to the right-hand member of thin aluminum pipe, and link to each other with the capillary, the capillary sets up in the sealed can, sealed can and first box all link to each other with the mechanism of heating through the heat collecting pipe, the mechanism of heating sets up the upper right side at the condenser, the mechanism of heating includes second box, heating wire, pressure sensor and second servo motor, the inlet of evaporimeter passes through the pipeline and links to each other with the lower extreme of capillary, and the exhaust hole through the recovery.

All-in-one of high low temperature all has media inlet tube, media outlet pipe, and the medium is at the integrative built-in heat exchange transition temperature of high low temperature. When the high-temperature and low-temperature integrated machine is installed, or after the medium is discharged due to equipment disassembly and inspection, the medium needs to be injected into the system again. In the process of injecting the medium, air exists in the medium outlet pipe; in order to not affect the normal operation of the subsequent reaction kettle or other equipment, the air in the medium outlet pipe needs to be discharged.

If direct outer wall top at the medium outlet pipe sets up blast pipe, discharge valve closes the time late, leads to the medium in the medium outlet pipe to spill over outside blast pipe, the discharge circulation system easily, and the hourglass of some medium has the potential safety hazard.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a high-low temperature all-in-one machine, and even if the closing of an exhaust valve is delayed, a medium cannot be discharged out of a circulating system to cause potential safety hazards.

The technical purpose of the invention is realized by the following technical scheme: a high-low temperature integrated machine comprises a box body, a medium inlet pipe, a medium outlet pipe, a compressor for refrigeration and a heating device for heating, wherein the compressor is connected with an inner heat exchanger for heat exchange;

the top end of the medium box is communicated with a medium adding pipe, the medium outlet pipe is positioned below the medium inlet pipe, one end of the exhaust pipe is communicated with the inner top of the medium outlet pipe, and the other end of the exhaust pipe is communicated with the medium inlet pipe or the inner top of the medium box; and the exhaust pipe is provided with an exhaust valve for controlling the on-off of the exhaust pipe.

Through above-mentioned technical scheme, refrigeration during operation, the medium flows along medium inlet tube, medium case, medium outlet pipe, external equipment circulation, and the heat transfer is carried out in heat exchanger department to the medium. When it is necessary to discharge the air of the medium outlet pipe, a person opens the discharge valve, and the air in the medium outlet pipe can spontaneously flow into the inner top of the medium inlet pipe (or medium tank) through the discharge pipe. The medium inlet pipe is used as a return pipe for the medium, the pressure in the pipe is low, the medium generally does not fill the inner head space of the medium inlet pipe, and the air in the exhaust pipe can form communication with the medium box. Since the height of the medium outlet pipe is lower than that of the medium inlet pipe, the air in the medium outlet pipe can be reliably evacuated. The exhausted air is finally exhausted out of the box body through the medium adding pipe.

After the exhaust valve is opened for a long time, personnel ensure that the air in the medium outlet pipe is exhausted, and then close the exhaust valve to reliably stop the exhaust pipe. Even if the closing of the exhaust valve is delayed, a small amount of upwelling medium can enter the medium inlet pipe through the exhaust pipe and then enter the medium box to continue circulation, and the medium cannot be discharged out of the circulation system to cause potential safety hazards.

Preferably, the exhaust pipe includes an upper section having a height higher than the medium inlet pipe.

Through the technical scheme, even if the medium inlet pipe is filled with the medium, the medium inlet pipe communicated with the top in the medium box is difficult to build pressure; by providing the upper section it is further ensured that the medium in the medium inlet pipe does not flow through the exhaust pipe to the medium outlet pipe.

Preferably, the upper end of the medium adding pipe is provided with a middle cylinder, the middle cylinder is positioned outside the box body, the medium adding pipe is communicated with the inner bottom of the middle cylinder, and the top of the middle cylinder is provided with a ventilation opening and an adding opening.

Through above-mentioned technical scheme, this high low temperature all-in-one need add the medium again after the dismouting, and personnel add the medium through the interpolation mouth of middle section of thick bamboo. When the medium is added, the inner space of the intermediate cylinder plays a role of buffering, so that the medium entering the medium box can not be stored in the intermediate cylinder temporarily. When the liquid level in the medium box goes up and down, the air in the medium box and the medium adding pipe goes in and out through the ventilating opening spontaneously, so that the medium can enter the medium box through the medium adding pipe.

Preferably, the intermediate cylinder is rotatably connected with the medium adding pipe, the rotation axis of the intermediate cylinder is vertical, the position of the adding port deviates from the rotation axis of the intermediate cylinder, and the intermediate cylinder and the medium adding pipe establish rotary sealing through a sealing piece arranged between the intermediate cylinder and the medium adding pipe.

Through the technical scheme, personnel can change the position of the adding port by rotating the middle cylinder, and can conveniently avoid obstacles such as walls or align with the input pipeline of media.

Preferably, the compressor is also connected with an outer heat exchanger for heat exchange, and the compressor, the inner heat exchanger and the outer heat exchanger are communicated pairwise to form circulation.

Through the technical scheme, the circulating medium is the refrigerant, the refrigerant is evaporated and absorbs heat at the inner heat exchanger to play a refrigeration role, and the refrigerant is cooled at the outer heat exchanger to reduce the temperature, so that the compressor can conveniently re-compress the refrigerant.

Preferably, the heating device comprises a heating box and an electric heating tube arranged in the heating box, and the medium outlet pipe (3) penetrates through the heating box.

Through the technical scheme, the heating of the all-in-one machine is carried out in an electric heating mode, and the medium can be heated after the electric heating pipe is electrified.

Preferably, the exhaust pipe comprises a middle section, the length direction of the middle section is along the vertical direction, a floating plate is arranged in the middle section in a sliding mode along the vertical direction, the floating plate is located below the exhaust valve, a gap for air circulation is reserved between the floating plate and the inner wall of the middle section, and a sealing step surface is arranged in the middle section above the floating plate; when the floating plate rises along with the rise of the liquid level of the medium in the exhaust pipe, the floating plate can abut against the sealing step surface to separate the middle section.

Through above-mentioned technical scheme, the kickboard is used for floating on the medium surface, and after the kickboard riseed along with the liquid level height of medium in the blast pipe, thereby the kickboard can butt sealed step face and cut off the middle section. By means of the arrangement, even if the exhaust valve is closed in a delayed mode, the medium in the exhaust pipe cannot penetrate through the control valve to enter the medium inlet pipe, and the cold and hot media are prevented from escaping.

Preferably, the middle section includes dismantled and assembled installation section, the both ends and the middle section threaded connection of installation section, kickboard, sealed step face all are located the installation section.

Through the technical scheme, the floating plate and the sealing step surface are convenient to arrange by arranging the detachable installation section.

Preferably, the exhaust valve is a ball valve, the exhaust valve comprises a valve seat, a spherical valve core and a handle positioned outside the valve seat, the handle is used for driving the valve core to rotate, and the valve core is provided with a communicating port for liquid to pass through in a penetrating manner; the valve seat is fixed on the middle section, a sliding rod is fixed at the top of the floating plate and is in sliding connection with the middle section, an abutting block is arranged at the upper end of the sliding rod, and an inclined guide surface is arranged on the top surface of the abutting block; when the exhaust valve is in a fully opened state, the sliding rod can enable the abutting block to partially enter the valve seat through sliding, and the floating plate abuts against the sealing step surface; when the valve core rotates, the valve core is abutted to the guide surface through the edge of the opening part of the communication opening, and then the abutting block is driven to move downwards to be separated from the communication opening.

Through above-mentioned technical scheme, when personnel rotated the handle and closed discharge valve, the oral area edge butt spigot surface of intercommunication mouth can be ordered about in the rotation of case, and then orders about the butt piece and move down and break away from the intercommunication mouth, and the kickboard breaks away from sealed step face this moment, and the kickboard can not lead to the fact the circulation of air in the exhaust pipe and block. The floating plate is arranged to overcome the adhesion force of the floating plate and the sealing step surface after soaking media, so that the floating plate can be reliably separated from the sealing step surface; when the exhaust valve is opened next time, the exhaust function of the exhaust pipe can be normally operated.

In summary, compared with the prior art, the beneficial effects of the invention are as follows:

1. even if the closing of the exhaust valve is delayed, the medium can not be discharged out of the circulating system to cause potential safety hazard;

2. the exhaust of the medium box and the injection of the medium into the medium box are more convenient;

3. through setting up the kickboard, the medium in the exhaust pipe can not get into in the medium inlet pipe, has prevented scurrying each other of cold and hot medium.

Drawings

FIG. 1 is a schematic diagram of a high-low temperature all-in-one machine according to a first embodiment;

FIG. 2 is an enlarged view of FIG. 1 at A;

fig. 3 is a partial view of a high-low temperature all-in-one machine according to a second embodiment.

In the figure, 1, a box body; 2. a medium inlet pipe; 3. a medium outlet pipe; 4. a compressor; 40. a heating device; 41. an inner heat exchanger; 42. an external heat exchanger; 43. an oil separator; 5. a medium box; 51. a circulation pipe; 511. a circulation pump; 6. a medium addition pipe; 61. an intermediate barrel; 611. a ventilation opening; 612. an addition port; 62. a seal member; 621. a seal ring; 622. a retaining ring; 7. an exhaust pipe; 71. an upper section; 72. a middle section; 8. an exhaust valve; 81. a valve seat; 82. a valve core; 83. a handle; 821. a communication port; 73. an installation section; 731. a support frame; 74. a floating plate; 75. a slide bar; 76. a butting block; 761. a guide surface; 732. and sealing the step surface.

Detailed Description

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

The first embodiment is as follows:

referring to fig. 1, the high and low temperature all-in-one machine disclosed by the invention comprises a box body 1, a medium inlet pipe 2, a medium outlet pipe 3, a compressor 4 for refrigeration and a heating device 40 for heating are arranged in the box body 1, a medium box 5 for storing media is also arranged in the box body 1, and the medium of the embodiment is heat conduction oil. The compressor 4 is connected with an inner heat exchanger 41 for heat exchange and an outer heat exchanger 42 for heat exchange, the heating device 40 of the embodiment includes a heating box, and an electric heating tube disposed in the heating box, and the medium outlet pipe 3 passes through the heating box. One end of the medium inlet pipe 2 and one end of the medium outlet pipe 3 are positioned inside the box body 1, and the other end of the medium inlet pipe and the other end of the medium outlet pipe penetrate out of the box body 1 and are used for communicating with subsequent equipment to use media.

The end of the medium inlet pipe 2 in the case 1 is connected to the inner top of the medium box 5, and the medium inlet pipe 2 and the medium box 5 are both located above the medium outlet pipe 3. The inner heat exchanger 41 is a hollow container, the inner heat exchanger 41 has an inlet and an outlet, the inner bottom of the medium tank 5 is communicated with the inner heat exchanger 41 through a circulation pipe 51 arranged therebetween, the circulation pipe 51 is connected with a circulation pump 511, and the circulation pump 511 is used for driving the medium to flow. The medium inlet pipe 2 is communicated with the inlet of the inner heat exchanger 41 through the medium box 5 and the circulating pipe 51 in sequence; the end of the medium outlet pipe 3 located inside the tank 1 communicates with the outlet of the inner heat exchanger 41.

The compressor 4, the inner heat exchanger 41 and the outer heat exchanger 42 are communicated with each other two by two to form circulation, and the circulating medium is a refrigerant; an oil separator 43 is connected to the refrigerant pipe between the compressor 4 and the external heat exchanger 42, and the oil separator 43 is used to remove oil in the refrigerant mixed with the lubricating oil of the compressor 4 when the refrigerant circulates. During cooling, the refrigerant circulates along the compressor 4, the outer heat exchanger 42, and the inner heat exchanger 41, and the refrigerant flows through the hollow cavity of the inner heat exchanger 41 by passing through a copper pipe. The external heat exchanger 42 exchanges heat with the refrigerant by external cooling water or water cooling. The refrigeration process is accompanied by the gaseous state and liquid state conversion of the refrigerant, and the refrigeration principle of the high-temperature all-in-one machine is the same as that of the air conditioner, which is not described herein again. When heating, the heating device 40 heats the medium through the electric heating pipe; the electric heating tube is internally provided with an electric heating wire which is insulated with the electric heating tube. The compressor 4 and the heating device 40 can only select one of them to operate to cool or heat the medium.

Referring to fig. 1 and 2, the top end of the medium box 5 is communicated with a medium adding pipe 6, and the other end of the medium adding pipe 6 penetrates out of the box body 1 and extends upwards. The medium adding pipe 6 has an intermediate cylinder 61 at the upper end thereof, the intermediate cylinder 61 is located outside the case 1, the medium adding pipe 6 is communicated with the inner bottom of the intermediate cylinder 61, and the top of the intermediate cylinder 61 is provided with a ventilation port 611 and an adding port 612. The intermediate cylinder 61 is axially vertically arranged, the intermediate cylinder 61 is rotatably connected to the medium adding pipe 6 with its rotation axis vertically arranged, and the position of the adding port 612 is offset from the rotation axis of the intermediate cylinder 61. The middle cylinder 61 and the medium adding pipe 6 are provided with flanges at the mutual contact positions, the middle cylinder 61 and the medium adding pipe 6 establish rotary seal through the sealing element 62 arranged between the middle cylinder 61 and the medium adding pipe 6, the sealing element 62 comprises a sealing ring 621 and a retaining ring 622, the sealing ring 621 is positioned between the contact surfaces of the flanges at the end parts of the middle cylinder 61 and the medium adding pipe 6, the retaining ring 622 compresses the flanges at the end parts where the middle cylinder 61 and the medium adding pipe 6 are connected, so that the sealing ring 621 is kept in a compressed state, and the rotary seal of the middle cylinder 61 and the medium adding pipe 6 is realized.

The medium box 5 is also provided with a liquid level meter (not shown in the figure) for displaying the liquid level of the medium box, the medium can be lost in the long-term use process of the high-low temperature all-in-one machine, the medium needs to be added again after the high-low temperature all-in-one machine is disassembled and assembled, and the medium is added through the adding port 612 of the middle barrel 61 by personnel. When the medium is added, the inner space of the intermediate cylinder 61 plays a role of buffering so that the medium having entered the medium tank 5 is not stored in the intermediate cylinder 61 temporarily. When the liquid level in the medium box 5 rises, the air in the medium box 5 and the medium adding pipe 6 automatically enters and exits through the ventilation port 611, so that the medium can enter the medium box 5 through the medium adding pipe 6. Personnel can change the position of the adding port 612 by rotating the middle barrel 61, and the device is convenient to avoid obstacles such as walls or align with the input pipeline of the medium.

Referring to fig. 1, an exhaust pipe 7 is further arranged in the box body 1, one end of the exhaust pipe 7 is communicated with the inner top of the medium outlet pipe 3, the other end of the exhaust pipe 7 is communicated with the inner top of the medium inlet pipe 2 (also can be communicated with the inner top of the medium box 5), and an exhaust valve 8 for controlling the on-off of the exhaust pipe 7 is arranged on the exhaust pipe 7. The exhaust pipe 7 comprises an upper section 71 and a middle section 72 which are directly communicated, the length direction of the middle section 72 is along the vertical direction, and the exhaust valve 8 is positioned in the middle section 72; the upper section 71 is higher than the medium inlet pipe 2, the upper section 71 is bent in an inverted U shape, and the end of the upper section 71 departing from the middle section 72 is communicated with the inner top of the medium inlet pipe 2.

The working conditions of the high-temperature and low-temperature integrated machine are as follows: in normal operation, the medium circulates along the medium inlet pipe 2, the medium box 5, the medium outlet pipe 3, and the external equipment, and the medium exchanges heat at the internal heat exchanger 41. If the medium outlet pipe 3 outputs the high-temperature medium, the inner heat exchanger 41 plays a role of heating the medium; if the medium outlet pipe 3 outputs a low-temperature medium, the inner heat exchanger 41 functions to cool the medium, and the replacement of the cooling and heating functions of the inner heat exchanger 41 is manually controlled.

When it is desired to discharge the air in the medium outlet pipe 3, a person opens the discharge valve 8, and the air in the medium outlet pipe 3 can spontaneously enter the inner top of the medium inlet pipe 2 through the discharge pipe 7. The medium inlet pipe 2 serves as a return pipe for the medium, the pressure in the pipe is low, the medium is generally not filled in the inner head space of the medium inlet pipe 2, and the air in the exhaust pipe 7 can be communicated with the medium tank 5 through the inner head space of the medium inlet pipe 2. Since the height of the medium outlet pipe 3 is lower than that of the medium inlet pipe 2, the air in the medium outlet pipe 3 can be reliably evacuated.

Even if the medium inlet pipe 2 is filled with the medium, it is difficult to build a pressure in the medium inlet pipe 2 communicating with the top in the medium tank 5, and the medium in the medium inlet pipe 2 does not flow to the medium outlet pipe 3 through the exhaust pipe 7 by providing the upper section 71. After the exhaust valve 8 is opened for a long time, personnel can judge that the air in the medium outlet pipe 3 is exhausted according to the detected flow and flow speed conditions, can also judge according to experience, and then close the exhaust valve 8 to reliably stop the exhaust pipe 7.

Even if the closing of the exhaust valve 8 is delayed, a small amount of upwelling medium can enter the medium inlet pipe 2 through the exhaust pipe 7 and then enter the medium box 5 for continuous circulation, and the medium cannot be discharged out of the circulation system to cause potential safety hazards.

The circulation pipe 51, the compressor 4, the inner heat exchanger 41, the outer heat exchanger 42, the medium inlet pipe 2, the medium outlet pipe 3, the exhaust pipe 7 and the exhaust valve 8 may be arranged in a plurality of sets in parallel, and different compressors 4 may be operated in different working conditions to output media of different temperatures.

Example two:

the second embodiment of the high-temperature and low-temperature integrated machine is different from the first embodiment in that:

referring to fig. 1 and 3, the exhaust valve 8 is a ball valve, the exhaust valve 8 includes a valve seat 81, a spherical valve core 82, and a handle 83 located outside the valve seat 81, the handle 83 is used for driving the valve core 82 to rotate, and the valve core 82 is provided with a communication port 821 through which liquid passes. The valve seat 81 is a straight-through type, the valve seat 81 is fixed on the middle section 72, and the connecting line of the inlet and outlet ends of the valve seat 81 is along the vertical direction.

The middle section 72 includes a removable mounting section 73, the mounting section 73 being located below the vent valve 8 and abutting against the valve seat 81, the mounting section 73 conducting the middle section 72. The mounting section 73 is cylindrical, two ends of the mounting section 73 are in threaded connection with the middle section 72, and the axis of the mounting section 73 is vertical. A support 731 is fixed in the installation section 73, a floating plate 74 is arranged in the installation section 73 in a sliding manner along the length direction of the installation section, and a gap for air circulation is reserved between the floating plate 74 and the inner wall of the installation section 73. A sliding rod 75 is fixed on the top of the floating plate 74, the sliding rod 75 passes through a supporting frame 731 and is in sliding contact with the supporting frame 731, and the supporting frame 731 has a hole for air to pass through. An abutting block 76 is fixed to the upper end of the sliding rod 75, and an inclined guide surface 761 is provided on the top surface of the abutting block 76, so that the top of the abutting block 76 is tapered upward.

The installation section 73 is further provided with a sealing step surface 732, the sealing step surface 732 is located below the support frame 731, the sealing step surface 732 surrounds the sliding rod 75 in a circular ring shape, and a gap for air to pass through is reserved between the outer wall of the sliding rod 75 and the sealing step surface 732. The sealing step face 732 is used to abut the top surface of the floating plate 74 and establish a seal, thereby blocking the internal passage of the middle section 72.

The floating plate 74 is made of foam or plastic, the floating plate 74 is used for floating on the surface of the medium, and when the floating plate 74 rises along with the rise of the liquid level of the medium in the exhaust pipe 7, the floating plate 74 can abut against the sealing step surface 732 to separate the middle section 72. Thus, even if the exhaust valve 8 is closed with a delay, the medium in the exhaust pipe 7 does not pass through the control valve into the medium inlet pipe 2, preventing the hot and cold medium from being mixed.

When the exhaust valve 8 is in the fully open state, the communication port 821 opens the valve seat 81 in the vertical direction, the slide rod 75 moves in accordance with the movement of the floating plate 74, and when the floating plate 74 abuts against the seal step surface 732, the slide rod 75 slides to cause the abutting block 76 to partially enter the valve seat 81, and the guide surface 761 faces the opening position of the communication port 821.

With this arrangement, when the person turns the handle 83 to close the exhaust valve 8, the rotation of the valve body 82 urges the edge of the opening of the communication port 821 to abut against the guide surface 761, and further urges the abutting block 76 to move downward and separate from the communication port 821, and at this time, the floating plate 74 separates from the seal stepped surface 732, and the floating plate 74 does not block the air flow in the exhaust pipe 7. The arrangement is such that the adhesion force after the floating plate 74 and the seal step face 732 are soaked with the medium is overcome, so that the floating plate 74 and the seal step face 732 can be reliably separated; when the exhaust valve 8 is opened next time, the exhaust function of the exhaust pipe 7 can be normally operated.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. The utility model provides a high low temperature all-in-one, includes box (1), media inlet tube (2), media outlet pipe (3), is used for refrigerated compressor (4), is used for heating device (40), compressor (4) even have interior heat exchanger (41) that are used for the heat transfer, media inlet tube (2), media outlet pipe (3) communicate respectively the exit both ends of interior heat exchanger (41), characterized by: the medium heat exchanger is characterized by further comprising a medium box (5) and an exhaust pipe (7), wherein the inner bottom of the medium box (5) is communicated with the inner heat exchanger (41) through a circulating pipe (51) arranged between the medium box and the inner heat exchanger, and the medium inlet pipe (2) is communicated with an inlet of the inner heat exchanger (41) sequentially through the medium box (5) and the circulating pipe (51);

the top end of the medium box (5) is communicated with a medium adding pipe (6), the medium outlet pipe (3) is positioned below the medium inlet pipe (2), one end of the exhaust pipe (7) is communicated with the inner top of the medium outlet pipe (3), and the other end of the exhaust pipe (7) is communicated with the inner top of the medium inlet pipe (2) or the medium box (5); an exhaust valve (8) for controlling the on-off of the exhaust pipe (7) is arranged on the exhaust pipe;

the exhaust pipe (7) comprises a middle section (72), the length direction of the middle section (72) is in the vertical direction, a floating plate (74) is arranged in the middle section (72) in a sliding mode in the vertical direction, the floating plate (74) is located below the exhaust valve (8), a gap for air circulation is reserved between the floating plate (74) and the inner wall of the middle section (72), and a sealing step surface (732) is arranged in the middle section (72) above the floating plate (74); when the floating plate (74) rises along with the rise of the liquid level of the medium in the exhaust pipe (7), the floating plate (74) can abut against the sealing step surface (732) so as to separate the middle section (72);

the exhaust valve (8) is a ball valve, the exhaust valve (8) comprises a valve seat (81), a spherical valve core (82) and a handle (83) positioned outside the valve seat (81), the handle (83) is used for driving the valve core (82) to rotate, and the valve core (82) penetrates through a communication port (821) for liquid to pass through; the valve seat (81) is fixed on the middle section (72), a sliding rod (75) is fixed at the top of the floating plate (74), the sliding rod (75) is connected with the middle section (72) in a sliding mode, a butting block (76) is arranged at the upper end of the sliding rod (75), and an inclined guide surface (761) is arranged on the top surface of the butting block (76); when the exhaust valve (8) is in a fully open state, the sliding rod (75) can enable the abutting block (76) to partially enter the valve seat (81) through sliding, and at the moment, the floating plate (74) abuts against the sealing step surface (732); when the valve core (82) rotates, the valve core (82) abuts against the guide surface (761) through the opening edge of the communication opening (821), and further drives the abutting block (76) to move downwards to be separated from the communication opening (821).

2. A high and low temperature all-in-one machine as claimed in claim 1, wherein: the exhaust pipe (7) comprises an upper section (71), the upper section (71) being higher than the medium inlet pipe (2).

3. A high and low temperature all-in-one machine as claimed in claim 1, wherein: the upper end of the medium adding pipe (6) is provided with a middle cylinder (61), the middle cylinder (61) is positioned outside the box body (1), the medium adding pipe (6) is communicated with the inner bottom of the middle cylinder (61), and the top of the middle cylinder (61) is provided with a ventilation opening (611) and an adding opening (612).

4. A high and low temperature all-in-one machine as claimed in claim 3, wherein: the middle cylinder (61) is rotationally connected with the medium adding pipe (6), the rotating axis of the middle cylinder is vertical, the position of the adding port (612) deviates from the rotating axis of the middle cylinder (61), and the middle cylinder (61) and the medium adding pipe (6) establish rotary sealing through a sealing piece (62) arranged between the middle cylinder and the medium adding pipe.

5. A high and low temperature all-in-one machine as claimed in claim 1, wherein: the compressor (4) is also connected with an outer heat exchanger (42) for heat exchange, and the compressor (4), the inner heat exchanger (41) and the outer heat exchanger (42) are communicated in pairs to form circulation.

6. A high and low temperature all-in-one machine as claimed in claim 1, wherein: the heating device (40) comprises a heating box and an electric heating pipe arranged in the heating box, and the medium outlet pipe (3) penetrates through the heating box.

7. A high and low temperature all-in-one machine as claimed in claim 1, wherein: the middle section (72) comprises a detachable installation section (73), two ends of the installation section (73) are in threaded connection with the middle section (72), and the floating plate (74) and the sealing step surface (732) are located in the installation section (73).