Circulating water vacuum pump and rotary evaporation device for preparing cosmetic raw materials

Abstract

The utility model relates to a circulating water vacuum pump and a rotary evaporation device for preparing cosmetic raw materials, the circulating water vacuum pump comprises a vacuum pump assembly and a water tank assembly, the water tank assembly comprises a first box body located below the vacuum pump assembly and a second box body located outside the first box body, and cold liquid is stored in the second box body; the first box body and the second box body are connected through a first pipeline, a first valve and a first liquid conveying pump are arranged in the first pipeline, a first liquid outlet is formed in one side of the first box body, and a first liquid inlet is formed in one side of the second box body; the control assembly comprises a first temperature sensor and a first liquid level sensor which are located in the first box body, a second temperature sensor and a second liquid level sensor which are located in the second box body, and a controller located on the outer wall of the second box body. Compared with the prior art, the vacuum degree in the rotary evaporation process is kept stable, the heat transfer efficiency and the evaporation speed of rotary evaporation are effectively improved, and the energy consumption is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of reaction devices, in particular to a circulating water vacuum pump and a rotary evaporation device for preparing cosmetic raw materials. Background Art

[0002] In the process of preparing raw materials for cosmetics, a rotary evaporation device is often used for rotary evaporation. During the rotary evaporation process, a circulating water vacuum pump is needed to maintain the vacuum degree during the reaction. However, when the circulating water vacuum pump needs to operate continuously for a long time, the water temperature in the water tank will rise, thereby affecting the vacuum degree of the water pump. As the water temperature rises, the vacuum degree of the circulating water vacuum pump decreases, which in turn leads to a decrease in heat transfer efficiency and evaporation rate, as well as an increase in energy consumption during the rotary evaporation process. During the current experimental process, operators often manually detect the water temperature in the water tank of the circulating water vacuum pump and then manually replace the water in the water tank to keep the water temperature in the water tank stable. However, this process requires the operator to concentrate at all times, which can easily lead to untimely replacement, and the operation is cumbersome, time-consuming and labor-intensive.

[0003] Patent publication number CN221568838U discloses a circulating water vacuum pump. Equipped with a controller, temperature sensor, and other structures, the pump can sense and automatically stabilize the water temperature in a water tank, ensuring the water temperature in the tank remains stable and does not affect the vacuum level of the pump. However, after a period of use, the circulating water vacuum pump is prone to over-adding or over-discharging water during the water addition or draining process. This results in excessive water in the water tank being too late to drain, or too little water being drained and too late to be replenished, thus affecting the normal operation of the circulating water vacuum pump. Utility Model Content

[0004] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and to provide a circulating water vacuum pump and a rotary evaporation device for the preparation of cosmetic raw materials, so that the vacuum degree of the rotary evaporation process can be kept stable, and the heat transfer efficiency and evaporation rate of the rotary evaporation can be effectively improved, and the energy consumption can be reduced, thereby improving the efficiency of the preparation of cosmetic raw materials and reducing costs.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] In one aspect, the present invention provides a circulating water vacuum pump for preparing cosmetic raw materials, comprising:

[0007] Vacuum pump components

[0008] a water tank assembly comprising a first tank body located below the vacuum pump assembly and a second tank body located outside the first tank body, wherein the second tank body stores cold liquid, the first tank body and the second tank body are connected by a first pipe, a first valve and a first liquid delivery pump are provided in the first pipe, a first liquid outlet is provided on one side of the first tank body, a first liquid inlet is provided on one side of the second tank body, a second valve and a second liquid delivery pump are provided in the first liquid outlet, and a third valve and a third liquid delivery pump are provided in the first liquid inlet;

[0009] And a control component located on the water tank assembly, which includes a first temperature sensor and a first liquid level sensor located in the first tank body, a second temperature sensor and a second liquid level sensor located in the second tank body, and a controller located on the outer wall of the second tank body, and the controller is electrically connected to the first valve, the second valve, the third valve, the first liquid delivery pump, the second liquid delivery pump, the third liquid delivery pump, the first temperature sensor, the second temperature sensor, the first liquid level sensor, and the second liquid level sensor.

[0010] Furthermore, since the second box is located outside the first box, the water temperature thereof will not be affected by the operation of the vacuum pump assembly.

[0011] Furthermore, a heat insulation layer is provided on the four side walls of the second box body to further avoid the influence of the temperature of the liquid in the first box body.

[0012] Furthermore, the first pipe is located at the upper part of the side wall of the first box to facilitate the mixing of hot liquid and cold liquid in the first box; and is located at the lower part of the side wall of the second box to allow the liquid in the second box to flow out under the action of pressure, thereby reducing the power of the first liquid delivery pump.

[0013] Furthermore, the first liquid outlet is located at the lower part of the side wall of the first box body. Since the heat loss in this part is relatively small, when setting the controller, the amount of cold liquid discharged from the first liquid outlet is ignored, and it is assumed that all the liquid flowing out is hot liquid.

[0014] The first liquid inlet is located at the upper portion of the side wall of the second box body.

[0015] Furthermore, the first box body and the second box body are cubic structures or cylindrical structures, so that the cross-sectional areas at different heights in the first box body and the second box body are the same, and the volume of liquid flowing out or in can be detected by the first liquid level sensor and the second liquid level sensor.

[0016] Furthermore, the first temperature sensor is located in the middle area of ​​the bottom of the first box body and is not in contact with the vacuum pump assembly;

[0017] The second temperature sensor is located in the middle area of ​​the bottom of the second box.

[0018] Furthermore, the first liquid level sensor is inserted into the first box body and is located at the side wall of the first box body, without contacting the first pipe and the first liquid outlet;

[0019] The second liquid level sensor is inserted into the second box body and is located at the side wall of the second box body, and is not adjacent to the first pipe and the first liquid inlet.

[0020] Furthermore, the vacuum pump assembly includes:

[0021] a protective shell located above the first box;

[0022] A motor and a filtration structure located inside the protective shell;

[0023] And a control panel is located on one side of the outer surface of the protective shell, and a vacuum meter, an air extraction nozzle, a power switch and a power indicator light are arranged on one side of the outer surface of the control panel.

[0024] Furthermore, a heat dissipation window is provided on the outer surface of the protective shell, and the position of the heat dissipation window is opposite to the position of the control board.

[0025] Furthermore, the circulating water vacuum pump further comprises a liquid storage chamber having one end connected to the first liquid outlet via a second pipe and the other end connected to the first liquid inlet via a third pipe. A fourth valve is provided on the second pipe, and a fifth valve is provided on the third pipe.

[0026] Since the temperature of the hot liquid in the first box body is not too high in actual process, the hot liquid entering the liquid storage chamber contacts with the outside air and can be cooled naturally.

[0027] On the other hand, the utility model also provides a rotary evaporation device for preparing cosmetic raw materials, which includes the circulating water vacuum pump.

[0028] Furthermore, the rotary evaporation device further comprises:

[0029] Water bath;

[0030] A rotating bottle with a portion of the bottle body placed in the water bath;

[0031] A machine head connected to one end of the rotating bottle;

[0032] an intermediate bottle connected to the other end of the machine head;

[0033] A condenser connected to the upper end of the intermediate bottle has a vacuum pumping port provided on its side wall, and the circulating water vacuum pump is connected to the vacuum pumping port;

[0034] A collecting bottle connected to the lower end of the intermediate bottle and connected to the rest of the vacuum pumping ports;

[0035] and a feeding pipe connected to one end of the middle bottle away from the machine head, wherein the feeding pipe is located inside the middle bottle and the other end extends into the rotating bottle.

[0036] Furthermore, the vacuum exhaust port is connected to the exhaust nozzle of the circulating water vacuum pump through a hose.

[0037] The working principle of the circulating water vacuum pump provided by the utility model is:

[0038] It is known that the bottom area of ​​the first box is A1, and the bottom area of ​​the second box is A2;

[0039] The initial liquid level height in the first tank is detected by the first liquid level sensor as H1, so it can be known that the initial liquid volume in the first tank is V1=A1H1;

[0040] The initial liquid level height in the second tank detected by the second liquid level sensor is H2. It can be known that the initial liquid volume in the second tank is V2 = A2H2. The liquid level height in the second tank after the cold liquid flows into the first tank is recorded as H2', and the volume of the cold liquid flowing from the second tank into the first tank is recorded as V. Then V = A2(H2-H2');

[0041] A critical temperature Xa is set, and the first temperature sensor can detect the temperature of the liquid in the first box. The hot liquid temperature greater than Xa is recorded as X1, and the liquid temperature after the hot liquid flows out and the cold liquid flows in is recorded as X1';

[0042] The second temperature sensor detects that the temperature of the coolant in the second box is X2;

[0043] In order to effectively control the amount of hot liquid flowing out of the first tank and the amount of cold liquid flowing into the first tank from the second tank, and to prevent the first tank from having too much or too little liquid, the liquid level of the first tank is set to H1 after both the cold liquid and the hot liquid flow out. Then, the volume of the cold liquid flowing into the first tank and the volume of the hot liquid flowing out of the first tank are the same, namely V.

[0044] The standard temperature of the liquid after hot liquid flows out and cold liquid flows into the first box is set to Xb, X1>Xa>Xb>X2;

[0045] Then the liquid in the first tank always satisfies X1(V1-V)+X2V=XbV1, that is, V=V1(Xb-X1) / (X2-X1). Since V1, Xb, X1, and X2 are all known, the volume V of the cold liquid flowing from the second tank into the first tank can be known. Further, through V=A2(H2-H2'), it can be known that H2'=H2-V1(Xb-X1) / [(X2-X1)A2].

[0046] Therefore, the controller in the present invention can adopt PIC control, and its control process and principle are as follows:

[0047] When the first temperature sensor detects that X1 is greater than Xa, the controller controls the first valve and the second valve to open, and the first liquid delivery pump and the second liquid delivery pump to start. When the second liquid level sensor detects that the height of the liquid in the second box after it drops satisfies H2'=H2-V1(Xb-X1) / [(X2-X1)A2], the controller controls the first valve and the first liquid delivery pump to close. After the first valve and the first liquid delivery pump are closed, and when the first liquid level sensor detects that the liquid height in the first box is H1, the controller controls the second valve and the second liquid delivery pump to close. At this time, the third valve and the third liquid delivery pump are opened. When the second liquid level sensor detects that the liquid level is H2, the third valve and the third liquid delivery pump are closed. At this time, the first temperature sensor detects the temperature in the first box again, and X1'≈Xb.

[0048] Compared with the prior art, the utility model has the following advantages:

[0049] (1) The utility model provides a circulating water vacuum pump with a water tank disposed within a first housing and a second housing connected by a first pipe. Cold liquid is stored in the second housing, and the temperature of the cold liquid in the second housing is not affected by the water temperature in the first housing and the vacuum pump assembly. When the water temperature in the first housing is too high, cold liquid is introduced from the second housing. This avoids the need for the faucet to be constantly open, thereby increasing safety, compared to directly introducing cold liquid from an external faucet into the first housing.

[0050] (2) The utility model sets the water tank of the circulating water vacuum pump into a first box body and a second box body connected by a first pipe, stores cold liquid in the second box body, sets a first valve and a first liquid delivery pump in the first pipe, sets a first temperature sensor and a first liquid level sensor in the first box body, sets a second temperature sensor and a second liquid level sensor in the second box body, and sets a controller on the outer wall of the second box body. During operation, the first valve, the first liquid delivery pump, the second valve and the second liquid delivery pump can be controlled to be opened by measuring the temperature in the first box body, so that the hot liquid in the first box body flows out and the cold liquid in the second box body flows into the first box body, and the hot liquid outflow volume and the cold liquid inflow volume can be determined by measuring the liquid level height in the first box body and the second box body, and then the first valve, the first liquid delivery pump, the second valve and the second liquid delivery pump can be controlled to be closed, and the third valve and the third liquid delivery pump can be controlled to be opened or closed by measuring the liquid level height in the second box body. The water temperature and volume in the first chamber can be effectively controlled, maintaining a stable water temperature without affecting the vacuum level of the circulating water vacuum pump. Furthermore, the water volume in the first chamber can be kept stable, preventing the problem of excessive water addition or removal during the water addition or removal process after a period of use, which could cause the circulating water vacuum pump to malfunction and disrupt its normal operation, thereby affecting the vacuum level during the rotary evaporation process. This effectively improves the heat transfer efficiency and evaporation rate of the rotary evaporation process, while reducing energy consumption, thereby improving the efficiency of cosmetic raw material preparation and reducing costs.

[0051] (3) The utility model connects a liquid storage chamber between the first liquid outlet and the first liquid inlet, and uses the liquid storage chamber to receive the hot liquid discharged from the first box body, and transmits it to the second box body after cooling, so as to be circulated and used by the circulating water vacuum pump, so as to avoid wasting water resources and effectively save water resources.

[0052] (3) The utility model is provided with a heat dissipation window. When the air pump component is working, the temperature will continue to rise. The heat dissipation window is opened on the side wall of the protective shell to enable uniform heat dissipation. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 This is a schematic structural diagram of the circulating water vacuum pump shown in Example 1;

[0054] Figure 2 This is a schematic structural diagram of the circulating water vacuum pump shown in Example 2;

[0055] Figure 3 This is a schematic diagram of the position of the heat dissipation window shown in Example 2;

[0056] Figure 4 This is a schematic structural diagram of the circulating water vacuum pump shown in Example 3;

[0057] Figure 5 Schematic diagram of the structure of the rotary evaporation device (without a circulating water vacuum pump) shown in Examples 4 to 6.

[0058] Description of the marks in the figure:

[0059] 1-water tank assembly, 11-first tank body, 111-first liquid outlet, 112-second valve, 113-second liquid delivery pump, 12-second tank body, 121-first liquid inlet, 122-third valve, 123-third liquid delivery pump, 124-insulation layer, 13-first pipeline, 14-first valve, 15-first liquid delivery pump;

[0060] 2-vacuum pump assembly, 21-protective shell, 22-control panel, 221-vacuum gauge, 222-exhaust nozzle, 223-power switch, 224-power indicator light, 23-heat dissipation window;

[0061] 3-control component, 31-first temperature sensor, 32-controller, 33-first liquid level sensor, 34-second liquid level sensor, 35-second temperature sensor;

[0062] 4-liquid storage chamber, 41-second pipeline, 42-third pipeline, 43-fourth valve, 44-fifth valve;

[0063] 51-water bath, 52-rotating bottle, 53-machine head, 54-intermediate bottle, 55-condenser, 551-vacuum exhaust port, 56-collecting bottle, 57-feeding tube. DETAILED DESCRIPTION

[0064] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. The embodiments are based on the technical solution of the present invention and provide detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments. In the following embodiments or examples, unless otherwise specified, functional components or structures are conventional components or structures used in the art to achieve the corresponding functions.

[0065] It should be noted that in the description of this utility model, the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0066] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0067] In the following embodiments, the first temperature sensor 31 and the second temperature sensor 35 are thermocouples, model WRE-203S; the first liquid level sensor 33 and the second liquid level sensor 34 are capacitive liquid level sensors, model FST700-204; the first liquid delivery pump 15, the second liquid delivery pump 113, and the third liquid delivery pump 123 are circulation pumps, and the first valve 14, the second valve 112, and the third valve 122 are electric valves.

[0068] A circulating water vacuum pump for preparing cosmetic raw materials, comprising:

[0069] Vacuum pump assembly 2

[0070] The water tank assembly 1 includes a first tank body 11 located below the vacuum pump assembly 2, and a second tank body 12 located outside the first tank body 11. The second tank body 12 stores cold liquid. The first tank body 11 and the second tank body 12 are connected by a first pipe 13. A first valve 14 and a first liquid delivery pump 15 are provided in the first pipe 13. A first liquid outlet 111 is provided on one side of the first tank body 11, and a first liquid inlet 121 is provided on one side of the second tank body 12. A second valve 112 and a second liquid delivery pump 113 are provided in the first liquid outlet 111. A third valve 122 and a third liquid delivery pump 123 are provided in the first liquid inlet 121.

[0071] And a control component 3 located on the water tank assembly 1, which includes a first temperature sensor 31 and a first liquid level sensor 33 located in the first box body 11, a second temperature sensor 35 and a second liquid level sensor 34 located in the second box body 11, and a controller 32 located on the outer wall of the second box body 12, and the controller 32 is electrically connected to the first valve 14, the second valve 112, the third valve 122, the first liquid delivery pump 15, the second liquid delivery pump 113, the third liquid delivery pump 123, the first temperature sensor 31, the second temperature sensor 32, the first liquid level sensor 33, and the second liquid level sensor 34.

[0072] In some more specific embodiments, since the second tank 12 is located outside the first tank 11, its water temperature will not be affected by the operation of the vacuum pump assembly 2.

[0073] In some more specific embodiments, the second tank 12 is provided with a heat insulation layer 124 on its four peripheral side walls, to further avoid the influence of the temperature of the liquid in the first tank 11.

[0074] In some more specific embodiments, the first pipe 13 is located at the upper part of the side wall of the first tank 11, to facilitate the mixing of hot liquid and cold liquid in the first tank 11; and is located at the lower part of the side wall of the second tank 12, to cause the liquid in the second tank 12 to flow out under the action of pressure, reducing the power consumption of the first liquid delivery pump 15.

[0075] In some more specific embodiments, the first liquid outlet 111 is located at the lower part of the side wall of the first tank 11, since this part has less heat loss, when the controller 32 is set, the amount of cold liquid discharged from the first liquid outlet 111 is ignored, and it is assumed that all the liquid flowing out is hot liquid.

[0076] The first liquid inlet 121 is located at the upper part of the side wall of the second tank 12.

[0077] In some more specific embodiments, the first tank 11 and the second tank 12 are in a cubic or cylindrical structure, so that the cross-sectional areas at different heights in the first tank and the second tank are the same, and the volume of the liquid flowing out or flowing in can be detected by the first liquid level sensor and the second liquid level sensor.

[0078] In some more specific embodiments, the first temperature sensor 31 is located at the middle area of the bottom of the first tank 11 and does not contact the vacuum pump assembly 2.

[0079] The second temperature sensor 35 is located at the middle area of the bottom of the second tank 12.

[0080] In some more specific embodiments, the first liquid level sensor 33 is inserted into the inside of the first tank 11 and is located at the side wall of the first tank 11 and does not contact the first pipe 13 and the first liquid outlet 111.

[0081] The second liquid level sensor 34 is inserted into the inside of the second tank 12 and is located at the side wall of the second tank 12 and does not contact the first pipe 13 and the first liquid inlet 121.

[0082] In some more specific embodiments, the vacuum pump assembly 2 comprises:

[0083] a protective shell 21 located above the first box body 11;

[0084] The motor and the filtration structure are located inside the protective shell 21;

[0085] A control panel 22 is located on one side of the outer surface of the protective shell 21 , and a vacuum gauge 221 , a vacuum nozzle 222 , a power switch 223 and a power indicator light 224 are provided on one side of the outer surface of the control panel 22 .

[0086] In some more specific embodiments, a heat dissipation window 23 is provided on the outer surface of the protective shell 21 , and the position of the heat dissipation window 23 is opposite to the position of the control board 22 .

[0087] Furthermore, the circulating water vacuum pump includes a liquid storage chamber 4 having one end connected to the first liquid outlet 111 via a second pipe 41 and the other end connected to the first liquid inlet 121 via a third pipe 42. A fourth valve 43 is provided on the second pipe 41, and a fifth valve 44 is provided on the third pipe 42. Since the temperature of the hot liquid in the first housing 11 is typically low, the hot liquid entering the liquid storage chamber 4 is naturally cooled by contact with the outside air.

[0088] A rotary evaporation device for preparing cosmetic raw materials comprises the circulating water vacuum pump.

[0089] In some more specific embodiments, the rotary evaporation device further comprises:

[0090] Water bath 51;

[0091] A rotating bottle 52 with part of the bottle body placed in the water bath 51;

[0092] A machine head 53 connected to one end of the rotating bottle 52;

[0093] an intermediate bottle 54 connected to the other end of the machine head 53;

[0094] The condenser 55 connected to the upper end of the intermediate bottle 54 has a vacuum exhaust port 551 provided on its side wall, and the circulating water vacuum pump is connected to the vacuum exhaust port 551;

[0095] The collecting bottle 56 connected to the lower end of the intermediate bottle 54 is connected to the rest of the vacuum pumping ports 551;

[0096] And a feeding pipe 57 connected to one end of the intermediate bottle 54 away from the machine head 53 , the feeding pipe 57 is located inside the intermediate bottle 54 , and the other end extends into the rotating bottle 52 .

[0097] In some more specific embodiments, the vacuum exhaust port 551 is connected to the exhaust nozzle 222 of the circulating water vacuum pump through a hose.

[0098] The working principle of the circulating water vacuum pump provided by the utility model is:

[0099] It is known that the bottom area of ​​the first box 11 is A1, and the bottom area of ​​the second box 12 is A2;

[0100] The first liquid level sensor 33 detects that the initial liquid level in the first tank 11 is H1, so it can be known that the initial liquid volume in the first tank 11 is V1=A1H1;

[0101] The second liquid level sensor 34 detects that the initial liquid level in the second tank 12 is H2. Therefore, the initial liquid volume in the second tank 12 is V2=A2H2. The liquid level in the second tank 12 after the cold liquid flows into the first tank 11 is recorded as H2', and the volume of the cold liquid flowing from the second tank 12 into the first tank 11 is recorded as V. Therefore, V=A2(H2-H2').

[0102] A critical temperature Xa is set, and the first temperature sensor 31 can detect the temperature of the liquid in the first box 11. The hot liquid temperature greater than Xa is recorded as X1, and the liquid temperature after the hot liquid flows out and the cold liquid flows in is recorded as X1';

[0103] The second temperature sensor 35 detects that the temperature of the coolant in the second box 12 is X2;

[0104] In order to effectively control the amount of hot liquid flowing out of the first tank 11 and the amount of cold liquid flowing into the first tank 11 from the second tank 12, and to prevent the first tank 11 from having too much or too little liquid, the liquid level of the first tank 11 is set to H1 after both cold liquid and hot liquid flow out. In this way, the volume of cold liquid flowing into the first tank 11 and the volume of hot liquid flowing out of the first tank 11 are the same, both being V.

[0105] Assuming that the standard temperature of the liquid after hot liquid flows out and cold liquid flows into the first box 11 is Xb, the liquid in the first box 11 always satisfies X1(V1-V)+X2V=XbV1, that is, V=V1(Xb-X1) / (X2-X1). Since V1, Xb, X1, and X2 are all known, the volume V of the cold liquid flowing from the second box 12 into the first box 11 can be known. Further, through V=A2(H2-H2'), it can be known that H2'=H2-V1(Xb-X1) / [(X2-X1)A2].

[0106] Therefore, the controller (32) in the present invention can adopt PIC control, and its control process and principle are as follows:

[0107] When the first temperature sensor 31 detects that X1 is greater than Xa, the controller 32 controls the first valve 14, the first liquid delivery pump 15, the second valve 112, and the second liquid delivery pump 113 to open. When the second liquid level sensor 34 detects that the height of the liquid in the second tank 12 has dropped to meet H2'=H2-V1(Xb-X1) / [(X2-X1)A2], the controller 32 controls the first valve 14 and the first liquid delivery pump 15 to close. When the first valve 14 and the first liquid delivery pump 15 are closed and the first liquid level sensor 34 detects that the liquid height in the first tank 11 is H1, the controller 32 controls the second valve 112 and the second liquid delivery pump 113 to close. At this time, the third valve 122 and the third liquid delivery pump 123 are opened. When the second liquid level sensor 34 detects that the liquid level is H2, the third valve 122 and the third liquid delivery pump 123 are closed. At this time, the first temperature sensor 31 detects the temperature in the first tank 11 again, and X1'≈Xb.

[0108] Example 1

[0109] A circulating water vacuum pump for the preparation of cosmetic raw materials, such as Figure 1 Shown, including:

[0110] Vacuum pump assembly 2

[0111] The water tank assembly 1 includes a first tank body 11 located below the vacuum pump assembly 2, and a second tank body 12 located outside the first tank body 11. The second tank body 12 stores cold liquid. The first tank body 11 and the second tank body 12 are connected by a first pipe 13. A first valve 14 and a first liquid delivery pump 15 are provided in the first pipe 13. A first liquid outlet 111 is provided on one side of the first tank body 11, and a first liquid inlet 121 is provided on one side of the second tank body 12. A second valve 112 and a second liquid delivery pump 113 are provided in the first liquid outlet 111. A third valve 122 and a third liquid delivery pump 123 are provided in the first liquid inlet 121.

[0112] And a control component 3 located on the water tank assembly 1, which includes a first temperature sensor 31 and a first liquid level sensor 33 located in the first box body 11, a second temperature sensor 35 and a second liquid level sensor 34 located in the second box body 11, and a controller 32 located on the outer wall of the second box body 12, and the controller 32 is electrically connected to the first valve 14, the second valve 112, the third valve 122, the first liquid delivery pump 15, the second liquid delivery pump 113, the third liquid delivery pump 123, the first temperature sensor 31, the second temperature sensor 32, the first liquid level sensor 33, and the second liquid level sensor 34.

[0113] In this embodiment, there are two first valves 14 and one first delivery pump 15 .

[0114] The working principle of the circulating water vacuum pump provided by the utility model is:

[0115] It is known that the bottom area of ​​the first box 11 is A1, and the bottom area of ​​the second box 12 is A2;

[0116] The first liquid level sensor 33 detects that the initial liquid level in the first tank 11 is H1, so it can be known that the initial liquid volume in the first tank 11 is V1=A1H1;

[0117] The second liquid level sensor 34 detects that the initial liquid level in the second tank 12 is H2. Therefore, the initial liquid volume in the second tank 12 is V2=A2H2. The liquid level in the second tank 12 after the cold liquid flows into the first tank 11 is recorded as H2', and the volume of the cold liquid flowing from the second tank 12 into the first tank 11 is recorded as V. Therefore, V=A2(H2-H2').

[0118] A critical temperature Xa is set, and the first temperature sensor 31 can detect the temperature of the liquid in the first box 11. The hot liquid temperature greater than Xa is recorded as X1, and the liquid temperature after the hot liquid flows out and the cold liquid flows in is recorded as X1';

[0119] The second temperature sensor 35 detects that the temperature of the coolant in the second box 12 is X2;

[0120] In order to effectively control the amount of hot liquid flowing out of the first tank 11 and the amount of cold liquid flowing into the first tank 11 from the second tank 12, and to prevent the first tank 11 from having too much or too little liquid, the liquid level of the first tank 11 is set to H1 after both cold liquid and hot liquid flow out. In this way, the volume of cold liquid flowing into the first tank 11 and the volume of hot liquid flowing out of the first tank 11 are the same, both being V.

[0121] Assuming that the standard temperature of the liquid after hot liquid flows out and cold liquid flows into the first box 11 is Xb, the liquid in the first box 11 always satisfies X1(V1-V)+X2V=XbV1, that is, V=V1(Xb-X1) / (X2-X1). Since V1, Xb, X1, and X2 are all known, the volume V of the cold liquid flowing from the second box 12 into the first box 11 can be known. Further, through V=A2(H2-H2'), it can be known that H2'=H2-V1(Xb-X1) / [(X2-X1)A2].

[0122] Therefore, the controller (32) can adopt PIC control, and a control process and principle thereof are as follows:

[0123] When the first temperature sensor 31 detects that X1 is greater than Xa, the first valve 14, the first liquid delivery pump 15, the second valve 112 and the second liquid delivery pump 113 are controlled to be opened by the controller 32; when the second liquid level sensor 34 detects that the height of liquid in the second tank 12 after falling satisfies H2'=H2-V1(Xb-X1) / [(X2-X1)A2], the first valve 14 and the first liquid delivery pump 15 are controlled to be closed by the controller 32; when the first valve 14 and the first liquid delivery pump 15 are closed, and when the first liquid level sensor 34 detects that the height of liquid in the first tank 11 is H1, the second valve 112 and the second liquid delivery pump 113 are controlled to be closed by the controller 32; at this time, the third valve 122 and the third liquid delivery pump 123 are opened; when the second liquid level sensor 34 detects that the height of liquid is H2, the third valve 122 and the third liquid delivery pump 123 are closed; at this time, the temperature in the first tank 11 is detected again by the first temperature sensor 31, and X1'≈Xb.

[0124] Embodiment 2

[0125] A circulating water vacuum pump for preparing cosmetic raw materials, as shown in Figure 2 and 3 comprises:

[0126] a vacuum pump assembly 2

[0127] a water tank assembly 1 comprising a first tank 11 located below the vacuum pump assembly 2, a second tank 12 located outside the first tank 11, the second tank 12 storing cold liquid, the first tank 11 being connected with the second tank 12 through a first pipeline 13, the first pipeline 13 being provided with a first valve 14 and a first liquid delivery pump 15, one side of the first tank 11 being provided with a first liquid outlet 111, one side of the second tank 12 being provided with a first liquid inlet 121, the first liquid outlet 111 being provided with a second valve 112 and a second liquid delivery pump 113, and the first liquid inlet 121 being provided with a third valve 122 and a third liquid delivery pump 123;

[0128] And a control component 3 located on the water tank assembly 1, which includes a first temperature sensor 31 and a first liquid level sensor 33 located in the first box body 11, a second temperature sensor 35 and a second liquid level sensor 34 located in the second box body 11, and a controller 32 located on the outer wall of the second box body 12, and the controller 32 is electrically connected to the first valve 14, the second valve 112, the third valve 122, the first liquid delivery pump 15, the second liquid delivery pump 113, the third liquid delivery pump 123, the first temperature sensor 31, the second temperature sensor 32, the first liquid level sensor 33, and the second liquid level sensor 34.

[0129] In this embodiment, there are two first valves 14 and one first delivery pump 15 .

[0130] In this embodiment, since the second box body 12 is located outside the first box body 11 , the water temperature thereof will not be affected by the operation of the vacuum pump assembly 2 .

[0131] In this embodiment, a heat insulating layer 124 is provided on the four side walls of the second box body 12 to further avoid the influence of the temperature of the liquid in the first box body 11 .

[0132] In this embodiment, the first pipe 13 is located at the upper part of the side wall of the first box body 11 to facilitate the mixing of hot liquid and cold liquid in the first box body 11; it is located at the lower part of the side wall of the second box body 12 to allow the liquid in the second box body 12 to flow out under the action of pressure, thereby reducing the power of the first liquid delivery pump 15.

[0133] In this embodiment, the first liquid outlet 111 is located at the lower portion of the side wall of the first box body 11. Since heat loss in this portion is relatively small, when setting the controller 32, the amount of cold liquid discharged from the first liquid outlet 111 is ignored, and it is assumed that all liquid discharged is hot liquid.

[0134] The first liquid inlet 121 is located on the upper side wall of the second box body 12 .

[0135] In this embodiment, the first box body 11 and the second box body 12 are cubic structures or cylindrical structures, so that the cross-sectional areas at different heights in the first box body and the second box body are the same, and the volume of liquid flowing out or in can be detected by the first liquid level sensor and the second liquid level sensor.

[0136] In this embodiment, the first temperature sensor 31 is located in the middle area of ​​the bottom of the first box 11 and does not contact the vacuum pump assembly 2;

[0137] The second temperature sensor 35 is located in the middle area of ​​the bottom of the second box 12 .

[0138] In this embodiment, the first liquid level sensor 33 is inserted into the first box body 11 and is located at the side wall of the first box body 11 and does not contact the first pipe 13 or the first liquid outlet 111;

[0139] The second liquid level sensor 34 is inserted into the second box body 12 and is located at the side wall of the second box body 12 , and does not contact the first pipe 13 or the first liquid inlet 121 .

[0140] In this embodiment, the vacuum pump assembly 2 includes:

[0141] a protective shell 21 located above the first box body 11;

[0142] The motor and the filtration structure are located inside the protective shell 21;

[0143] A control panel 22 is located on one side of the outer surface of the protective shell 21 , and a vacuum gauge 221 , a vacuum nozzle 222 , a power switch 223 and a power indicator light 224 are provided on one side of the outer surface of the control panel 22 .

[0144] In this embodiment, a heat dissipation window 23 is provided on the outer surface of the protective shell 21 , and the position of the heat dissipation window 23 is opposite to the position of the control board 22 .

[0145] Example 3

[0146] like Figure 4 As shown, compared with Example 2, most aspects are the same, except that the circulating water vacuum pump also includes a liquid storage chamber 4, one end of which is connected to the first liquid outlet 111 via a second pipe 41 and the other end is connected to the first liquid inlet 121 via a third pipe 42. A fourth valve 43 is provided on the second pipe 41, and a fifth valve 44 is provided on the third pipe 42. Because the temperature of the hot liquid in the first housing 11 is not excessively high in practice, the hot liquid entering the liquid storage chamber 4 comes into contact with the outside air, achieving natural cooling.

[0147] Example 4

[0148] A rotary evaporation device for preparing cosmetic raw materials, such as Figure 5 As shown, it includes the circulating water vacuum pump described in Example 1, which includes:

[0149] Water bath 51;

[0150] A rotating bottle 52 with part of the bottle body placed in the water bath 51;

[0151] A machine head 53 connected to one end of the rotating bottle 52;

[0152] an intermediate bottle 54 connected to the other end of the machine head 53;

[0153] The condenser 55 connected to the upper end of the intermediate bottle 54 has a vacuum exhaust port 551 provided on its side wall, and the circulating water vacuum pump is connected to the vacuum exhaust port 551;

[0154] The collecting bottle 56 connected to the lower end of the intermediate bottle 54 is connected to the rest of the vacuum pumping ports 551;

[0155] And a feeding pipe 57 connected to one end of the intermediate bottle 54 away from the machine head 53 , the feeding pipe 57 is located inside the intermediate bottle 54 , and the other end extends into the rotating bottle 52 .

[0156] In this embodiment, the vacuum exhaust port 551 is connected to the exhaust nozzle 222 of the circulating water vacuum pump through a hose.

[0157] Example 5

[0158] A rotary evaporation device for preparing cosmetic raw materials, such as Figure 5 As shown, it includes the circulating water vacuum pump described in Example 2, which includes:

[0159] Water bath 51;

[0160] A rotating bottle 52 with part of the bottle body placed in the water bath 51;

[0161] A machine head 53 connected to one end of the rotating bottle 52;

[0162] an intermediate bottle 54 connected to the other end of the machine head 53;

[0163] The condenser 55 connected to the upper end of the intermediate bottle 54 has a vacuum exhaust port 551 provided on its side wall, and the circulating water vacuum pump is connected to the vacuum exhaust port 551;

[0164] The collecting bottle 56 connected to the lower end of the intermediate bottle 54 is connected to the rest of the vacuum pumping ports 551;

[0165] And a feeding pipe 57 connected to one end of the intermediate bottle 54 away from the machine head 53 , the feeding pipe 57 is located inside the intermediate bottle 54 , and the other end extends into the rotating bottle 52 .

[0166] In this embodiment, the vacuum exhaust port 551 is connected to the exhaust nozzle 222 of the circulating water vacuum pump through a hose.

[0167] Example 6

[0168] A rotary evaporation device for preparing cosmetic raw materials, such as Figure 5 As shown, it includes the circulating water vacuum pump described in Example 3, which includes:

[0169] Water bath 51;

[0170] A rotating bottle 52 with part of the bottle body placed in the water bath 51;

[0171] A machine head 53 connected to one end of the rotating bottle 52;

[0172] an intermediate bottle 54 connected to the other end of the machine head 53;

[0173] The condenser 55 connected to the upper end of the intermediate bottle 54 has a vacuum exhaust port 551 provided on its side wall, and the circulating water vacuum pump is connected to the vacuum exhaust port 551;

[0174] The collecting bottle 56 connected to the lower end of the intermediate bottle 54 is connected to the rest of the vacuum pumping ports 551;

[0175] And a feeding pipe 57 connected to one end of the intermediate bottle 54 away from the machine head 53 , the feeding pipe 57 is located inside the intermediate bottle 54 , and the other end extends into the rotating bottle 52 .

[0176] In this embodiment, the vacuum exhaust port 551 is connected to the exhaust nozzle 222 of the circulating water vacuum pump through a hose.

[0177] The above description of the embodiments is intended to facilitate understanding and use of the utility model by those skilled in the art. Those skilled in the art will readily be able to make various modifications to these embodiments and apply the general principles described herein to other embodiments without requiring inventive effort. Therefore, the utility model is not limited to the above-described embodiments. Improvements and modifications made by those skilled in the art based on the disclosure of this utility model without departing from the scope of this utility model should be within the scope of protection of this utility model.

Claims

1. A circulating water vacuum pump for the preparation of cosmetic raw materials, characterized in that: include: Vacuum pump components (2) A water tank assembly (1) comprises a first tank body (11) located below the vacuum pump assembly (2) and a second tank body (12) located outside the first tank body (11); cold liquid is stored in the second tank body (12); the first tank body (11) and the second tank body (12) are connected via a first pipe (13); a first valve (14) and a first liquid delivery pump (15) are provided in the first pipe (13); a first liquid outlet (111) is provided on one side of the first tank body (11); a first liquid inlet (121) is provided on one side of the second tank body (12); a second valve (112) and a second liquid delivery pump (113) are provided in the first liquid outlet (111); and a third valve (122) and a third liquid delivery pump (123) are provided in the first liquid inlet (121); And a control component (3) located on the water tank component (1), comprising a first temperature sensor (31) and a first liquid level sensor (33) located in the first tank body (11), a second temperature sensor (35) and a second liquid level sensor (34) located in the second tank body (12), and a controller (32) located on the outer wall of the second tank body (12), wherein the controller (32) is electrically connected to the first valve (14), the second valve (112), the third valve (122), the first liquid delivery pump (15), the second liquid delivery pump (113), the third liquid delivery pump (123), the first temperature sensor (31), the second temperature sensor (35), the first liquid level sensor (33), and the second liquid level sensor (34).

2. A circulating water vacuum pump for preparing cosmetic raw materials according to claim 1, characterized in that: The first pipe (13) is located at the upper part of the side wall of the first box body (11) and at the lower part of the side wall of the second box body (12).

3. A circulating water vacuum pump for preparing cosmetic raw materials according to claim 1, characterized in that: The first liquid outlet (111) is located at the lower part of the side wall of the first box body (11); The first liquid inlet (121) is located on the upper side wall of the second box body (12).

4. A circulating water vacuum pump for preparing cosmetic raw materials according to claim 1, characterized in that: The first box (11) and the second box (12) are cubic structures or cylindrical structures.

5. A circulating water vacuum pump for preparing cosmetic raw materials according to claim 1, characterized in that: The first temperature sensor (31) is located in the middle area of ​​the bottom of the first box (11); The second temperature sensor (35) is located in the middle area of ​​the bottom of the second box (12).

6. A circulating water vacuum pump for preparing cosmetic raw materials according to claim 1, characterized in that: The first liquid level sensor (33) is inserted into the first box (11) and is located at the side wall of the first box (11); The second liquid level sensor (34) is inserted into the second box (12) and is located at the side wall of the second box (12).

7. A circulating water vacuum pump for preparing cosmetic raw materials according to claim 1, characterized in that: The vacuum pump assembly (2) comprises: a protective shell (21) located above the first box (11); A motor and a filtration structure located inside the protective shell (21); and a control panel (22) located on one side of the outer surface of the protective shell (21), wherein the outer surface of the control panel (22) is provided with a vacuum gauge (221), an air extraction nozzle (222), a power switch (223) and a power indicator light (224).

8. A circulating water vacuum pump for preparing cosmetic raw materials according to claim 1, characterized in that: The circulating water vacuum pump further comprises a liquid storage chamber (4) having one end connected to the first liquid outlet (111) via a second pipe (41) and the other end connected to the first liquid inlet (121) via a third pipe (42).

9. A rotary evaporation device for preparing cosmetic raw materials, characterized in that: It comprises the circulating water vacuum pump according to any one of claims 1 to 8.

10. A rotary evaporation device for preparing cosmetic raw materials according to claim 9, characterized in that: The rotary evaporation device also includes: Water bath (51); A rotating bottle (52) with a portion of the bottle body placed in the water bath (51); a machine head (53) connected to one end of the rotating bottle (52); an intermediate bottle (54) connected to the other end of the machine head (53); A condenser (55) connected to the upper end of the intermediate bottle (54) has a vacuum pumping port (551) provided on its side wall, and the circulating water vacuum pump is connected to the vacuum pumping port (551); A collecting bottle (56) connected to the lower end of the intermediate bottle (54) and connected to the remaining vacuum pumping ports (551); and a feeding pipe (57) connected to one end of the middle bottle (54) away from the machine head (53), wherein the feeding pipe (57) is located inside the middle bottle (54) and the other end extends into the rotating bottle (52).

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