CN210612926U

CN210612926U - Condensation distillation instrument with water cooler

Info

Publication number: CN210612926U
Application number: CN201920841228.1U
Authority: CN
Inventors: 陈长权; 康士全; 胡志远; 张永祯
Original assignee: Changsha Yonglekang Instrument And Device Co ltd
Current assignee: Changsha Yonglekang Instrument And Device Co ltd
Priority date: 2019-06-04
Filing date: 2019-06-04
Publication date: 2020-05-26
Anticipated expiration: 2029-06-04

Abstract

The utility model discloses a condensation distiller with a water cooler, which relates to the technical field of laboratory analysis and detection equipment and comprises a distillation heating system, a distillation collecting system, a shell 11 and a control system; the distillation heating system is arranged at the rear upper part of the shell 11, the distillation collecting system is arranged at the middle lower part of the shell 11, the distillation heating system is communicated with the distillation collecting system through a steam connecting pipe 30, the control system is arranged at the front lower part of the shell 11 and is communicated with each system through a control line; the distillation collection system comprises more than one group of distillation collection components and cooling components which are arranged in parallel; the cooling component comprises a water cooler 17, a cooling water return pipe 4, a cooling water input pipe 36 and a circulating water pump; the device has the characteristics of convenient transportation and use, long service life, high condensation efficiency, low production cost and the like, and is suitable for the separation and purification test of liquid mixture samples in laboratories of tobacco, food, medicine, chemical industry and other industries.

Description

Condensation distillation instrument with water cooler

Technical Field

The utility model relates to a laboratory analysis check out test set technical field, especially a take condensation distillation appearance of cold water ware.

Background

In the prior art, when laboratories in multiple industries such as tobacco, food, medicine, chemical industry and the like perform analysis and detection, liquid mixture samples are often separated and purified by adopting a distillation mode. Although the traditional distillation device can realize the basic distillation function, the traditional distillation device also has a plurality of defects, such as safety in use, single-furnace single-sample distillation, waste of cooling water, uncontrollable distillation end point, no suck-back prevention function and the like. In recent years, some distillation apparatuses with anti-back suction assemblies have appeared, but the anti-back suction assemblies are usually arranged at the front ends of the condensation pipes, so that the anti-back suction assemblies are corroded by corrosive steam in the anti-back suction process, the service life of the distillation apparatus is shortened, and the cost of an analysis test is increased. In addition, these suck back prevention assemblies are disposed at the upper portion of the distillation flask, thus resulting in an increased size and height of the distillation apparatus, which is not advantageous for transportation nor use. Some distillation equipment is provided with a condensing device for cooling water, but the condensing device is an air cooling device, and a cooling water tank is arranged in the distillation equipment, so that the condensing effect for the cooling water is poor, and the condensing efficiency for distillation is reduced.

The integrated steam distillation instrument disclosed in the Chinese patent (patent application number 201720605532.7) comprises 3 groups of distillation units, each group of distillation units comprises a heating device, a steam distillation device, a cooling device, a terminal control device, an anti-suck-back device and a pressure release device, and each group of distillation units works singly or simultaneously and can distill a plurality of samples simultaneously.

The other Chinese patent (patent application number is 201310092691.8) discloses a 'distiller' which comprises a distiller bottle, a condenser bottle and a reflux bottle; the device also comprises a heating device corresponding to the distillation flask, a condensing system corresponding to the condensing flask, a control device and a shell; the condensing bottle is provided with a distilled gas inlet, a distilled liquid outlet, a condensate inlet and a condensate outlet; the distillation flask is provided with three bottle openings which are respectively marked as a first bottle opening, a second bottle opening and a third bottle opening; the distillation bottle is communicated with the distillation gas inlet of the condensation bottle through the first bottle mouth; the distillation flask is communicated with a nitrogen blowing device through the second bottle opening; the distillation flask is communicated with a sample adding device and a reverse suction prevention air supply device through the third bottle opening.

Also "integrated general purpose distillation appearance" that chinese patent (patent application number is 201310483784.3) disclosed, including heating device, cooling device, casing and support, heating device is equipped with a plurality of independent heating unit, the ceramic electric heater is installed on the kitchen frame of heating box, furnace mantle and retort are located ceramic electric heater's higher authority, the retort is installed in the furnace mantle, be equipped with a plurality of heating control button corresponding with heating unit on the casing, heating state pilot lamp, function control button and LCD screen, cooling device is connected to the heating unit, the condensation bottle is connected to the retort, the water tank is connected to the condensation bottle, cooling device connection control system, the below of cooling device's condensation bottle is equipped with the volumetric flask.

Disclosure of Invention

The utility model aims to solve the technical problem that a distillation plant is provided with convenient transportation and use, longer service life, high condensation efficiency and lower production cost.

In order to solve the problem, the utility model discloses the technical scheme who takes designs a condensation distillation appearance of taking the cold water ware: comprises a distillation heating system, a distillation collecting system, a shell 11 and a control system; the distillation heating system is arranged at the rear upper part of the shell 11, the distillation collecting system is arranged at the middle lower part of the shell 11, the distillation heating system is communicated with the distillation collecting system through a steam connecting pipe 30, the control system is arranged at the front lower part of the shell 11 and is communicated with each system through a control line; the distillation collection system comprises more than one group of distillation collection components and cooling components which are arranged in parallel; the cooling assembly comprises a water cooler 17, a cooling water return pipe 4, a cooling water input pipe 36 and a circulating water pump, the water cooler 17 is independently arranged on one side of the shell 11, the circulating water pump is arranged in the water cooler 17, the output end of the circulating water pump is communicated with the cooling water inlet end of the condenser in the distillation collection assembly through the cooling water input pipe 36, and the cooling water outlet end of the condenser is communicated with the water cooler 17 through the cooling water return pipe 4.

The distillation heating system comprises more than one group of distillation heating components which are arranged in parallel, each distillation heating component comprises a distillation flask 1, a distillation flask plug 2, a heating table 27, a heating plate 12 and a heat insulation cover 9, the heating table 27 is arranged at the rear upper part of the shell 11, the heating plate 12 and the heat insulation cover 9 are sequentially arranged on the heating table 27, the distillation flasks 1 are arranged on the heating plate 12 in the heat insulation cover 9, and the distillation flask plugs 2 are arranged at the upper ports of the distillation flasks 1; a branch fork pipe arranged at the upper part of the distillation flask 1 is communicated with a condenser in a distillation collection assembly in a distillation collection system through a steam connecting pipe 30.

The distillation heating system also comprises a temperature controller 18, and the temperature controller 18 is arranged at the lower rear part of the heating table 27 and the upper rear part of the shell 11.

The distillation collection assembly comprises a condenser 3, a condensate collection bottle 6 and a condenser fixing clamp 10; the condenser 3 is vertically arranged at the front part of the heating platform 27 and is clamped by a clamping opening of a condenser fixing clamp 10 fixed in front of the heating platform 27 by a clamping seat; a spiral condensing pipe 33 is arranged in the inner cavity of the condenser 3, an upper end inlet 31 of the spiral condensing pipe 33 is communicated with a branch pipe at the upper part of the distillation flask 1 through a steam connecting pipe 30, and a lower end outlet 29 of the spiral condensing pipe 33 is arranged at the upper part of an upper end bottle mouth of the condensate collecting bottle 6; the cooling water outlet end 32 at the upper part of the condenser 3 and the cooling water inlet end 35 at the lower part of the condenser are respectively communicated with the water cooler 17 through a cooling water return pipe 4 and a cooling water input pipe 36; the condensate collecting bottle 6 is arranged at the front middle lower part of the shell 11.

The distillation collection system also comprises a weighing device consisting of a weighing tray 14 and a pressure sensor 15, wherein the pressure sensor 15 is arranged at the front middle lower part of the shell 11, and the weighing tray 14 and the condensate collection bottle 6 are sequentially arranged on the pressure sensor 15.

The distillation collection assembly also comprises a back suction prevention device consisting of a back suction prevention electromagnetic valve 13, a back suction prevention connecting pipe 5 and a condenser back suction prevention port 34; the condenser anti-suck-back port 34 is arranged at the lower part of the condenser 3, slightly inclines upwards and is communicated with the lower end outlet 29 of the spiral condensing pipe 33; the anti-suck-back electromagnetic valve 13 is arranged at the lower part of the heating table 27 and the rear middle upper part of the shell 11, and two ends of the anti-suck-back connecting pipe 5 are respectively communicated with the anti-suck-back port 34 of the condenser and the anti-suck-back electromagnetic valve 13.

The control system comprises a control panel 28, a display screen 7, a heating button 8, a circulating water pump switch 21, a main power switch 22, an emergency button 24 and an electric appliance control panel 23; the control panel 28 is arranged at the front lower part of the shell 11, the display screen 7, the heating button 8, the circulating water pump switch 21 and the emergency button 24 are respectively arranged on the control panel 28, and the electric appliance control panel 23 and the main power switch 22 are arranged in the inner cavity of the front lower part of the shell 11.

A cooling water inlet and outlet joint fixing plate 26 is further arranged at the lower part of the left side or the right side of the shell 11 and is respectively communicated with the inner cavity of the water cooler 17 through a water inlet valve and a water outlet valve which are arranged on the cooling water inlet and outlet joint fixing plate; the control panel 28 is also provided with a water inlet switch 19 and a water outlet switch 20.

The condensation distiller with the water cooler of the utility model independently arranges the cooling water tank on the left side of the shell 11 and adopts the water cooler with a refrigerating (compression refrigeration or electronic refrigeration) device, thereby cooling the cooling water for condensation in time and having higher condensation efficiency; meanwhile, the anti-suck-back device is arranged below the condenser, and the steam is condensed into liquid before reaching the position, so that the steam is basically not available, and the adopted anti-suck-back electromagnetic valve cannot be corroded, so that the service life of the anti-suck-back electromagnetic valve is prolonged; meanwhile, a corrosion-resistant suck-back prevention electromagnetic valve with higher cost is not needed, so that the production cost is reduced. In addition, a bracket for fixing the anti-suck-back device is abandoned, so that the structure is more compact, the height is reduced, transportation and placement in a laboratory are facilitated, and the use is more convenient.

Drawings

Fig. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic left sectional view along the A-A axis of the present invention;

fig. 3 is a rear view schematic diagram of the present invention;

fig. 4 is a schematic top view of the present invention;

FIG. 5 is a left cross-sectional view along the B-B axis of the present invention;

fig. 6 is an enlarged schematic view of the condenser of the present invention.

In the figure:

1 is a distillation flask, 2 is a distillation bottle stopper, 3 is a condenser, 4 is a cooling water return pipe, 5 is an anti-suck-back connecting pipe, 6 is a condensate collecting bottle, 7 is a display screen, 8 is a heating button, 9 is a heat insulation cover, 10 is a condenser fixing clamp, 11 is a shell, 12 is a heating plate, 13 is an anti-suck-back electromagnetic valve, 14 is a weighing tray, 15 is a pressure sensor, 16 is a back plate, 17 is a water cooler, 18 is a temperature controller, 19 is a water inlet switch, 20 is a water outlet switch, 21 is a circulating water pump switch, 22 is a main power switch, 23 is an electric appliance control panel, 24 is an emergency button, 25 is a side baffle, 26 is a discharge connector fixing plate, 27 is a heating table, 28 is a control panel, 29 is a lower end outlet, 30 is a steam connecting pipe, 31 is an upper end inlet, 32 is a cooling water outlet, 33 is a spiral condensing pipe, 34 is an anti-suck-back port, 35 is a cooling water inlet port, and 36 is a cooling water inlet pipe.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples. The following description is given by way of example, but the scope of the invention should not be limited thereto.

Example 1:

the condensation distiller with the water cooler of the embodiment is composed of a distillation heating system, a distillation collecting system, a shell 11 and a control system.

The case 11 is a plate-and-frame type case, and has a plurality of heat radiating holes formed in the rear portions of the left and right sides thereof, side guards 25 formed in the front portions of the left and right sides thereof, and a plurality of heat radiating holes formed in the upper portion of the rear back plate 16 formed in the rear side thereof.

The distillation heating system is arranged at the rear upper part of the shell 11 and consists of six groups (six groups are adopted in the embodiment, and other numbers of groups can be adopted) of distillation heating components arranged in parallel.

The distillation heating assembly consists of a distillation flask 1, a distillation flask plug 2, a heating platform 27, a heating plate 12, a heat insulation cover 9 and a temperature controller 18, wherein the heating platform 27 is arranged at the upper rear part of the shell 11; a heating plate 12 (six heating plates are arranged in parallel) and a heat shield 9 (six heat shields 9 are combined into a whole) are sequentially arranged at the middle upper part of the inner cavity of the heating table 27 (six heating tables 27 are combined into a whole); the heat shield 9 is a rectangular thin-wall box without bottom, the periphery of the box is provided with a plurality of heat dissipation holes, the upper surface of the box is provided with six holes for placing the distillation bottles 1, and the distillation bottles 1 are arranged on a heating plate 12 in the heat shield 9 through the holes. The upper port (namely, the bottle mouth) of the distillation bottle 1 is sealed by a distillation bottle plug 2; a branch pipe is also arranged at the upper part of the distillation flask 1 and is communicated with a distillation collection system through a steam connecting pipe 30. The temperature controller 18 is disposed at the lower rear part of the heating stage 27 and the upper rear part of the housing 11, and its control line is connected to the control system together with the control line of the heating plate 12.

The distillation collection system consists of six groups of distillation collection components and cooling components which are arranged in parallel, wherein the distillation collection components are arranged in the front middle part of the shell 11, and the cooling components are independently arranged on the left side of the shell 11.

The distillation collection assembly consists of a condenser 3, a condensate collection bottle 6, a condenser fixing clamp 10, a weighing tray 14 and a pressure sensor 15.

The condenser 3 is a hollow pipe, is vertically arranged at the front part of the heating platform 27 and is clamped by a clamping opening of a condenser fixing clamp 10 fixed in front of the heating platform 27 by a clamping seat; a spiral condensing pipe 33 is arranged in the inner cavity of the condenser 3, the upper port of the condenser 3 is the upper inlet 31 of the spiral condensing pipe 33, and the lower port of the condenser 3 is the lower outlet 29 of the spiral condensing pipe 33; the cavity of the condenser 3 is used for introducing cooling water, and a cooling water outlet end 32 at the upper part of the condenser 3 and a cooling water inlet end 35 at the lower part of the condenser are respectively communicated with the return end and the output end of the cooling component through a cooling water return pipe 4 and a cooling water input pipe 36; one end of the steam connecting pipe 30 is communicated with a branch pipe at the upper part of the distillation flask 1, and the other end is communicated with an upper end inlet 31 of a spiral condensing pipe 33; the lower outlet 29 of the spiral condensation pipe 33 is arranged at the upper part of the upper mouth of the condensate collecting bottle 6. A pressure sensor 15 is provided at the front, middle and lower portion of the housing 11, on which a weighing tray 14 and a condensate collection bottle 6 are sequentially mounted. The control line of the pressure sensor 15 is connected to the control system.

In order to simplify the piping of the cooling water return pipe 4, the cooling water return pipes 4 in each three distillation collection assemblies may also be formed as series-connected piping, that is: the upper cooling water outlet port 32 of the condenser 3 in the first distillation collection unit group (the middle two distillation collection unit groups starting to the left and right in fig. 1, respectively) is connected to the lower cooling water inlet port 35 of the condenser 3 in the second distillation collection unit group by the cooling water return pipe 4, and so on.

The cooling assembly is composed of a water cooler 17, a cooling water input pipe 36, a cooling water return pipe 4, a water inlet valve, a water discharge valve and a circulating water pump (the water inlet valve, the water discharge valve and the circulating water pump are not shown in the attached drawings), and the water cooler 17 (comprising a water storage tank body and a refrigerating device which can be used for compression refrigeration or electronic refrigeration) is independently arranged on the left side of the shell 11; the circulating water pump is arranged in the water cooler 17, the output end of the circulating water pump is communicated with a cooling water inlet end 35 at the lower part of the condenser 3 through a cooling water input pipe 36, and a cooling water outlet end 32 at the upper part of the condenser 3 is communicated with the return end of the water cooler 17 through a cooling water return pipe 4; a cooling water inlet and outlet joint fixing plate 26 is further provided at the left or right lower portion of the housing 11, and a water inlet valve and a water outlet valve are respectively provided on the cooling water inlet and outlet joint fixing plate 26, and are respectively communicated with the cooling water inlet pipe 36 and the cooling water return pipe 4, and further communicated with the inner cavity of the water cooler 17.

The control system is composed of a control panel 28, a display screen 7, a heating button 8, a water inlet switch 19, a water discharge switch 20, a circulating water pump switch 21, a main power switch 22, an emergency button 24 and an electric appliance control panel 23. The control panel 28 is arranged at the front lower part of the shell 11, and is respectively provided with a display screen 7, a heating button 8, a water inlet switch 19, a water discharge switch 20, a circulating water pump switch 21 and an emergency button 24; the electric appliance control panel 23 and the main power switch 22 are arranged in the inner cavity of the front lower part of the shell 11; and is connected with each electric control component through a control line.

Before the test, the distillation flask 1 filled with the solution to be distilled is placed on the heating plate 12 (in the heat insulation cover 9), then the distillation flask plug 2 is plugged on the bottle mouth of the distillation flask 1, then the branch pipe of the distillation flask 1 is communicated with the upper end inlet 31 of the condenser 3 by the steam connecting pipe 30, and the condensate collecting bottle 6 is placed on the weighing tray 14. Then, a temperature control value of the temperature controller 18, a weighing value of the pressure sensor 15 or a heating time value of the heating plate 12 are set on the display 7. At this point, the test can be started, the heating plate 12 is started to heat, and the circulating water pump is started to circulate the cooling water. After the heating plate 12 is heated, the steam generated in the distillation flask 1 is introduced into the spiral condensing tube 33 in the condenser 3 through the steam connecting tube 30, is condensed into liquid by cooling water in the inner cavity of the condenser 3, and flows out from the lower end outlet 29 of the spiral condensing tube 33 to enter the condensate collecting flask 6. When the weighing value weighed by the pressure sensor 15 reaches a set value or the heating time of the heating plate 12 reaches the set time, the control system can automatically stop heating the heating plate 12 and stop the circulating water pump to work, and the whole test is finished.

In the test process, when the temperature value detected by the temperature controller 18 reaches the set temperature control value, the heating of the heating plate 12 is also automatically stopped, so that the automatic protection function is realized.

In the test process, cooling water in the water cooler 17 is conveyed to a cooling water input pipe 36 through a circulating water pump, and then enters the inner cavity of the condenser 3 from a cooling water inlet end 35 at the lower part of the condenser 3 to condense steam in the spiral condensing pipe 33; thereafter, the cooling water is sent from the cooling water outlet port 32 of the upper part of the condenser 3 to the water cooler 17 through the cooling water return pipe 4 to be cooled.

Example 2:

this embodiment is substantially the same as embodiment 1 except that: in the distillation collection assembly, a back suction prevention device is also arranged, and the back suction prevention device is composed of a back suction prevention electromagnetic valve 13, a back suction prevention connecting pipe 5 and a condenser back suction prevention port 34. The condenser suck-back prevention port 34 is arranged at the lower part of the condenser 3, slightly inclines upwards and is communicated with the lower end outlet 29 of the spiral condenser pipe 33; the suck-back prevention electromagnetic valve 13 is arranged at the lower part of the heating table 27 and the rear middle upper part of the shell 11; the two ends of the anti-suck-back connecting pipe 5 are respectively communicated with the anti-suck-back port 34 of the condenser and the anti-suck-back electromagnetic valve 13.

Before the test, the lower outlet 29 of the spiral condenser pipe 33 is inserted into the condensate collecting bottle 6 at the lower part thereof through a connecting pipe (not shown in the drawing); the subsequent test procedure was substantially the same as in example 1, except that at the end of the test, the suck back prevention solenoid valve 13 was activated in time to allow the lower end outlet 29 of the spiral condenser tube 33 together with the connecting tube inserted into the condensate collection bottle 6 to communicate with the atmosphere (in this case, the lower end opening of the connecting tube is placed in the condensate of the condensate collection bottle 6), thereby preventing the condensate of the condensate collection bottle 6 from being sucked back.

The utility model discloses a take condensation distillation appearance of cold water ware is applicable to the laboratory of trades such as tobacco, food, medicine, chemical industry and is experimental to separation and purification of liquid mixture sample.

Claims

1. A condensation distiller with a water cooler comprises a distillation heating system, a distillation collecting system, a shell (11) and a control system; the distillation heating system is arranged at the rear upper part of the shell (11), the distillation collecting system is arranged at the middle lower part of the shell (11), the distillation heating system is communicated with the distillation collecting system through a steam connecting pipe (30), the control system is arranged at the front lower part of the shell (11), and each system is communicated through a control line; the method is characterized in that: the distillation collection system comprises more than one group of distillation collection components and cooling components which are arranged in parallel; the cooling component comprises a water cooler (17), a cooling water return pipe (4), a cooling water input pipe (36) and a circulating water pump; the water cooler (17) is independently arranged on one side of the shell (11) and comprises a water storage tank body and a refrigerating device, and the refrigerating device is used for compression refrigeration or electronic refrigeration; the circulating water pump is arranged in the water cooler (17), the output end of the circulating water pump is communicated with the cooling water inlet end of the condenser in the distillation collection assembly through a cooling water input pipe (36), and the cooling water outlet end of the condenser is communicated with the water cooler (17) through a cooling water return pipe (4).

2. The cold water condenser/distiller of claim 1 wherein: the distillation heating system comprises more than one group of distillation heating components which are arranged in parallel, each distillation heating component comprises a distillation flask (1), a distillation flask plug (2), a heating table (27), a heating plate (12) and a heat insulation cover (9), the heating table (27) is arranged on the rear upper part of a shell (11), the heating plate (12) and the heat insulation cover (9) are sequentially arranged on the heating table (27), the distillation flasks (1) are arranged on the heating plate (12) in the heat insulation cover (9), and the distillation flask plugs (2) are arranged at the upper end openings of the distillation flasks (1); and a branch fork pipe arranged at the upper part of the distillation flask (1) is communicated with a condenser in a distillation collection assembly in a distillation collection system through a steam connecting pipe (30).

3. A cold water condenser/distiller as defined in claim 2 wherein: the distillation heating system also comprises a temperature control instrument (18), wherein the temperature control instrument (18) is arranged at the rear lower part of the heating table (27) and the rear upper part of the shell (11).

4. A cold water condenser/distiller as defined in claim 3 wherein: the distillation collection assembly comprises a condenser (3), a condensate collection bottle (6) and a condenser fixing clamp (10); the condenser (3) is vertically arranged at the front part of the heating table (27) and is clamped by a clamping opening of a condenser fixing clamp (10) fixed in front of the heating table (27) through a clamping seat; a spiral condenser pipe (33) is arranged in an inner cavity of the condenser (3), an upper end inlet (31) of the spiral condenser pipe (33) is communicated with a branch pipe at the upper part of the distillation flask (1) through a steam connecting pipe (30), and a lower end outlet (29) of the spiral condenser pipe (33) is arranged at the upper part of an upper end bottle mouth of the condensate collecting bottle (6); a cooling water outlet end (32) at the upper part of the condenser (3) and a cooling water inlet end (35) at the lower part of the condenser are respectively communicated with the water cooler (17) through a cooling water return pipe (4) and a cooling water input pipe (36); the condensate collecting bottle (6) is arranged at the front middle lower part of the shell (11).

5. The cold water chiller according to claim 4 wherein: the distillation collection system also comprises a weighing device consisting of a weighing tray (14) and a pressure sensor (15), wherein the pressure sensor (15) is arranged at the front middle lower part of the shell (11), and the weighing tray (14) and the condensate collection bottle (6) are sequentially arranged on the pressure sensor.

6. The cold water chiller according to claim 5 wherein: the distillation collection assembly also comprises a back suction prevention device consisting of a back suction prevention electromagnetic valve (13), a back suction prevention connecting pipe (5) and a condenser back suction prevention port (34); the anti-suck-back port (34) of the condenser is arranged at the lower part of the condenser (3), slightly inclines upwards and is communicated with the lower end outlet (29) of the spiral condensing pipe (33); the anti-suck-back electromagnetic valve (13) is arranged on the lower portion of the heating table (27) and the rear middle upper portion of the shell (11), and two ends of the anti-suck-back connecting pipe (5) are respectively communicated with the anti-suck-back port (34) of the condenser and the anti-suck-back electromagnetic valve (13).

7. The cold water chiller according to claim 6 wherein: the control system comprises a control panel (28), a display screen (7), a heating button (8), a circulating water pump switch (21), a main power switch (22), an emergency button (24) and an electric appliance control panel (23); the control panel (28) is arranged at the front lower part of the shell (11), a display screen (7), a heating button (8), a circulating water pump switch (21) and an emergency button (24) are respectively arranged on the control panel, and the electric appliance control panel (23) and the main power switch (22) are arranged in an inner cavity at the front lower part of the shell (11).

8. A cold water chiller according to claim 7 wherein: a cooling water inlet and outlet joint fixing plate (26) is further arranged at the lower part of the left side or the right side of the shell (11), and is respectively communicated with the inner cavity of the water cooler (17) through a water inlet valve and a water outlet valve which are arranged on the cooling water inlet and outlet joint fixing plate; the control panel (28) is also provided with a water inlet switch (19) and a water outlet switch (20).