CN210090996U - Cooling device capable of quickly forming temperature gradient - Google Patents
Cooling device capable of quickly forming temperature gradient Download PDFInfo
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- CN210090996U CN210090996U CN201920999988.5U CN201920999988U CN210090996U CN 210090996 U CN210090996 U CN 210090996U CN 201920999988 U CN201920999988 U CN 201920999988U CN 210090996 U CN210090996 U CN 210090996U
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Abstract
The utility model relates to a cooling device for quickly forming temperature gradient, which comprises a cooling box body, a cooling liquid storage barrel, a solid-liquid separator, a circulating pump, a device controller, a cooling liquid heater and a cooling liquid cooler, wherein the side wall of the upper part of the cooling box body is provided with a cooling liquid overflow port, the side wall of the cooling box body close to the lower part of the cooling liquid overflow port is provided with a high-temperature cooling liquid inlet, and a plurality of temperature sensors are arranged inside the cooling box body along the height direction; the export of coolant liquid containing bucket passes through coolant liquid circulating pipe and connects circulating pump one end, and the circulating pump other end divides behind circulating pump outlet valve to be two branches, and a branch road links to each other with coolant liquid heater one end through coolant liquid heater front end valve, and a branch road links to each other with coolant liquid cooler one end through coolant liquid cooler front end valve. The device simple structure can form corresponding temperature gradient according to the technology demand of difference fast, has solved the problem that present cooling device can't form required temperature field fast.
Description
Technical Field
The utility model relates to a cooling arrangement in some production links especially relates to a cooling device who forms temperature gradient fast.
Background
In some production processes, liquid drops of a certain material are required to be cooled and solidified into a pill-shaped solid, the cooling method comprises the steps of firstly changing raw material liquid into liquid drops, then dripping the liquid drops into a cooling device containing cooling liquid (immiscible with the raw material liquid), arranging a solid-liquid separation device at a cooling liquid outlet, separating the required pill-shaped solid, and cooling the cooling liquid and then re-entering the cooling device.
In some production processes, the roundness and yield of the resulting pelletized solids are closely related to the temperature distribution of the cooling liquid in the cooling apparatus and the length of time the feedstock droplets are cooled. The initial temperature of the cooling liquid in the traditional production process is uniform and constant, the currently used equipment only has cooling circulation and is used for taking away heat brought by upper hot liquid drops, the production can gradually reach a suitable production condition after a period of production, and the cooling liquid in the cooling device can form a temperature gradient of up-heating and down-cooling for a long time. The traditional cooling device is characterized in that a cooling box is additionally arranged outside a condenser for cooling as in the Chinese patent with the application number of 201620678583.8, the outer surface of the condenser is completely wrapped in the cooling box, cooling water is circularly cooled on the surface of the condenser, the heat exchange efficiency of the cooling mode is low, the uniformity and stability of a temperature field in the cross section direction cannot be guaranteed, and the longitudinal temperature gradient distribution cannot be realized, so that the qualification rate of products is influenced.
SUMMERY OF THE UTILITY MODEL
According to the deficiency of the existing equipment, the technical problem to be solved by the utility model is to design a cooling device which can quickly form the temperature gradient. The device simple structure easily makes, can form corresponding temperature gradient according to the technology demand of difference fast, has solved the problem that present cooling device can't form required temperature field fast.
In order to solve the technical problem, the technical scheme of the utility model is that:
a cooling device capable of quickly forming temperature gradient comprises a cooling box body, a cooling liquid storage barrel, a solid-liquid separator, a circulating pump and a device controller, wherein a cooling liquid overflow port is formed in the side wall of the upper part of the cooling box body; the cooling liquid overflow port is connected with the cooling liquid storage barrel through a cooling liquid overflow pipeline; the solid-liquid separator is arranged at the upper part of the cooling liquid storage barrel, and the inlet of the solid-liquid separator is connected with the cooling liquid outlet of the cooling liquid box body through a cooling liquid outlet valve; the method is characterized in that:
the side wall of the cooling box body close to the lower part of the cooling liquid overflow port is provided with a high-temperature cooling liquid inlet, the device also comprises a cooling liquid heater and a cooling liquid cooler, and a plurality of temperature sensors are arranged in the cooling box body along the height direction; the outlet of the cooling liquid storage barrel is connected with one end of a circulating pump through a cooling liquid circulating pipe, the other end of the circulating pump is divided into two branches after passing through an outlet valve of the circulating pump, one branch is connected with one end of a cooling liquid heater through a front valve of the cooling liquid heater, and the other branch is connected with one end of a cooling liquid cooler through a front valve of the cooling liquid cooler;
the other end of the cooling liquid heater is connected with a high-temperature cooling liquid inlet through a high-temperature cooling liquid pipeline; the other end of the cooling liquid cooler is connected with a low-temperature cooling liquid inlet through a low-temperature cooling liquid pipeline;
the temperature sensors, the front end valve of the cooling liquid cooler, the front end valve of the cooling liquid heater, the circulating pump, the outlet valve of the circulating pump, the cooling liquid heater, the cooling liquid cooler and the cooling liquid outlet valve are connected with the device controller.
The use process of the device is as follows:
firstly, a cooling box with a temperature gradient is constructed: setting an upper limit temperature and a lower limit temperature in a device controller, setting the time required for finishing the leading-in, and then starting the process, wherein the device controller opens a front end valve of a cooling liquid heater and an outlet valve of a circulating pump, closes the front end valve of the cooling liquid cooler and a cooling liquid outlet valve of a valve, injects normal-temperature cooling liquid into a cooling liquid storage barrel, starts the circulating pump and injects the cooling liquid into the cooling liquid heater from the cooling liquid storage barrel, wherein the flow rate is controlled by setting the power of the circulating pump and the opening of the front end valve of the cooling liquid heater by the device controller, the cooling liquid is heated to the lower limit temperature after entering the cooling liquid heater and then begins to be injected into the cooling tank, the power of the cooling liquid heater is changed by the device controller at the moment, the temperature of the cooling liquid flowing through the cooling liquid heater is required to be gradually increased, and the temperature increase, continuously carrying out the process until the injection with the required height is completed;
when different temperature gradients are needed, inputting corresponding upper temperature limit and lower temperature limit into the device controller, and automatically controlling the power of the cooling liquid heater to meet different conditions; if different lead-in time is needed, the change is carried out by controlling a circulating pump and a front end valve of a cooling liquid heater;
after production begins, a front end valve of the cooling liquid heater is closed, a front end valve of the valve cooling liquid cooler, an outlet valve of the circulating pump and a cooling liquid outlet valve are opened, namely cooling circulation of the equipment is started, the flow rate of cooling liquid entering the cooling box body is larger than the flow rate of cooling liquid leaving the cooling box body through an outlet controlled by the cooling liquid outlet valve by controlling the opening degrees of the front end valve of the valve cooling liquid cooler and the cooling liquid outlet valve and the power of the circulating pump, so that overflow is formed on the upper part of the cooling box, wherein the size of the overflow amount is controlled by the device controller, and the required temperature gradient of production can be maintained in the overflow process.
Compare with traditional cooling device, the beneficial effects of the utility model are that:
1. through setting up the leading-in function of high temperature coolant liquid, can form required coolant liquid temperature field before the production process begins fast, can reach optimum production condition in advance before the production begins fast, construct the temperature gradient that suits in the cooler bin, just form suitable coolant liquid temperature field in a long period of time after beginning with traditional production and compare, can reduce the raw materials liquid that preheats the part and consume to utilize this utility model device can keep higher production efficiency when the preparation begins.
2. The realization of the circulation of the newly added high-temperature cooling liquid does not need to separately arrange a circulating pump, but shares a circulating pump with the cooling liquid cooling circulation, so that the equipment cost is relatively low, the pipeline connection is simple and convenient, the circulation resistance is small, and the energy consumption is reduced as far as possible on the premise of realizing the product function.
3. By adding the device controller, the temperature distribution in the cooling box can be monitored in real time, and the normal operation and fault monitoring of equipment are facilitated. Under different production process requirements, the required temperature range can be flexibly input into the device controller, the formation of cooling liquid with different temperature gradients can be conveniently and quickly completed, and automatic control is realized. To sum up, the utility model discloses a direct leading-in high temperature coolant liquid in the middle part of cooler bin body, the cooperation is at the leading-in low temperature coolant liquid in the lower part of cooler bin to form the required temperature gradient of production fast in the cooler bin, the detection shows that the highest just rounding of the pill solid qualification rate of producing is better when the coolant liquid possesses the temperature gradient of cold under the heat.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the cooling device for rapidly forming a temperature gradient according to the present invention.
In the figure, 1, a cooling box body, 2, a low-temperature cooling liquid pipeline, 3, a high-temperature cooling liquid pipeline, 4, a cooling liquid overflow pipeline, 5, a cooling liquid circulation pipeline, 6, a circulating pump, 7, a device controller, 8, a cooling liquid cooler, 9, a cooling liquid heater, 10, a solid-liquid separator, 11, a cooling liquid containing barrel, 12, a temperature sensor, 13, a front end valve of the cooling liquid heater, 14, a front end valve of the cooling liquid cooler, 15, an outlet valve of the circulation pump, and 16, an outlet valve of the cooling liquid.
Detailed Description
The present invention will be further explained with reference to the following examples and drawings, but the scope of the present invention is not limited thereto.
The cooling device for quickly forming the temperature gradient comprises a cooling box body 1, a cooling liquid storage barrel 11, a solid-liquid separator 10, a circulating pump 6 and a device controller 7, wherein the side wall of the upper part of the cooling box body is provided with a cooling liquid overflow port, the side wall of the lower part of the cooling box body is provided with a low-temperature cooling liquid inlet, and the bottom of the cooling box body is provided with a cooling liquid outlet; the cooling liquid overflow port is connected with the cooling liquid storage barrel through a cooling liquid overflow pipeline 4; the solid-liquid separator 10 is arranged at the upper part of the cooling liquid accommodating barrel 11, and the inlet of the solid-liquid separator 10 is connected with the cooling liquid outlet of the cooling liquid box body 1 through a cooling liquid outlet valve 16; a high-temperature cooling liquid inlet is arranged on the side wall of the cooling box body close to the lower part of the cooling liquid overflow port;
the device also comprises a cooling liquid heater 9 and a cooling liquid cooler 8, wherein a plurality of temperature sensors 12 are arranged in the cooling box body along the height direction; the outlet of the cooling liquid storage barrel 11 is connected with one end of a circulating pump 6 through a cooling liquid circulating pipe 5, the other end of the circulating pump is divided into two branches through a circulating pump outlet valve 15, one branch is connected with one end of a cooling liquid heater 9 through a cooling liquid heater front end valve 13, and the other branch is connected with one end of a cooling liquid cooler 8 through a cooling liquid cooler front end valve 14;
the other end of the cooling liquid heater 9 is connected with a high-temperature cooling liquid inlet through a high-temperature cooling liquid pipeline 3; the other end of the cooling liquid cooler 8 is connected with a low-temperature cooling liquid inlet through a low-temperature cooling liquid pipeline 2;
the temperature sensors, the front end valve 14 of the cooling liquid cooler, the front end valve 13 of the cooling liquid heater, the circulating pump 6, the outlet valve 15 of the circulating pump, the cooling liquid heater 9, the cooling liquid cooler 8 and the cooling liquid outlet valve 16 are connected with the device controller.
In the utility model, the cooling liquid heater 9 can heat the cooling liquid to the set temperature by adopting the ways of heat tracing band, heating coil and the like; the cooling liquid cooler 8 can adopt various heat exchangers such as a sleeve type heat exchanger, a shell-and-tube type heat exchanger, a plate type heat exchanger and a spiral plate type heat exchanger, and the cooling liquid is cooled by tap water or chilled water.
A number of temperature sensors are arranged at equal intervals within the cooling box body. The number and location of the temperature sensors may be varied as desired. For example, the height of the rectangular parallelepiped part of the cooling box is divided into five equal parts, and temperature sensors are arranged at four equal parts from the bottom to the top to detect the liquid level temperatures at different heights, and the liquid level temperatures are transmitted to the device controller 7 to be used as the reference of a user.
The number of low temperature coolant inlets and high temperature coolant inlets is a plurality, preferably an even number, such as 2, 4, 6. In the figure, inlets are symmetrically arranged on two sides of the cooling box body respectively, so that the inflow is more uniform and stable, and the arrangement of the inlets can be selected according to actual requirements; the orifice at the uppermost part is an overflow port and is used as a cooling liquid overflow outlet; a high-temperature cooling liquid inlet is arranged below the uppermost part and used for introducing heated cooling liquid; the bottom of the cooling box body is provided with a low-temperature cooling liquid inlet which is used for introducing cooling liquid after being cooled; the lower part of the conical groove is a cooling liquid circulating outlet.
The device controller of the utility model is connected with the temperature sensor in the cooling box body and receives the detected temperature signal; the device controller is connected with a front-end valve 14 of the cooling liquid cooler, a front-end valve 13 of the cooling liquid heater, the circulating pump 6, an outlet valve 15 of the circulating pump and a cooling liquid outlet valve 16, and can control the flow of each pipe section; the device controller is also connected with the cooling liquid cooler and the cooling liquid heater and is used for controlling the temperature of the entering cooling liquid. The device controller can monitor the temperature of the cooling liquid with different height levels in real time on one hand, and can control the forming process of the initial temperature gradient and the circulating process in normal production on the other hand.
The use process of the device is as follows:
firstly, a cooling box with a temperature gradient is constructed: setting an upper limit temperature and a lower limit temperature in an apparatus controller 7, setting a time required for finishing the introduction, and then starting the operation, wherein the apparatus controller opens a front end valve 13 of a cooling liquid heater, a circulating pump outlet valve 15, closes a front end valve 14 of the cooling liquid cooler and a cooling liquid outlet valve 16, injects a normal temperature cooling liquid into a cooling liquid storage barrel 11, pumps the cooling liquid into the cooling liquid heater 9 from the cooling liquid storage barrel 11 after starting a circulating pump 6, wherein the flow rate is controlled by setting the power of the circulating pump 6 and the opening degree of the front end valve 13 of the cooling liquid heater by the apparatus controller 7, the cooling liquid is heated to the lower limit temperature after entering the cooling liquid heater 9, and then starts to be injected into the cooling tank, the power of the cooling liquid heater 9 is changed by the apparatus controller 7 at the time when the temperature of the cooling liquid flowing through the cooling liquid heater 9 is required to be gradually increased, and the temperature increase rate is (upper limit, continuously carrying out the process until the injection with the required height is completed;
when different temperature gradients are required, corresponding upper temperature limits and lower temperature limits are input into the device controller 7, and different conditions can be met by automatically controlling the power of the cooling liquid heater 9; if different introduction times are required, the change is made by controlling the circulation pump 6 and the coolant heater front end valve 13;
after production starts, the front end valve 13 of the cooling liquid heater is closed, the front end valve 14 of the valve cooling liquid cooler, the outlet valve 15 of the circulating pump and the outlet valve 16 of the cooling liquid are opened, namely, cooling circulation of the equipment is started, the flow of the cooling liquid entering the cooling box body is larger than the flow of the cooling liquid leaving the cooling box body through an outlet controlled by the outlet valve 16 by controlling the opening degree of the front end valve 14 of the valve cooling liquid cooler and the opening degree of the cooling liquid outlet valve 16 and the power of the circulating pump 6, and overflow is formed at the upper part of the cooling box, wherein the overflow amount is controlled by the device controller 7, and the temperature gradient required by production can be maintained in the overflow process.
The realization principle is that a cooling box with a certain volume is assumed, the cooling liquid is required to be added to the production height within 20min, and a temperature gradient of 30-60 ℃ is formed from bottom to top. First, the average inlet flow X m may be determined by the volume to time ratio3S, so that the plant controller needs to control the valve opening so that the inlet average flow is Xm3S; then the power of the heating equipment (cooling liquid heater) is regulated and controlled by the device controller, so that the cooling liquid flowing through the heating equipment can be uniformly heated from 30 ℃ to 60 ℃ within 20 min; due to the sequence of injection from cold to hot into the cooling box body, a desired temperature gradient is formed in the cooling box body.
Examples
The cooling device capable of quickly forming the temperature gradient comprises a cooling box body 1, a circulating pump 6, a cooling liquid heater 9, a cooling liquid cooler 8, a temperature sensor 12, a device controller 7, a high-temperature cooling liquid pipeline 3, a low-temperature cooling liquid pipeline 2, a cooling liquid overflow pipeline 4, a cooling liquid circulating pipeline 5, a cooling liquid storage barrel 11 and a solid-liquid separator 10, wherein a cooling liquid overflow port is formed in the side wall of the upper part of the cooling box body;
the temperature sensor 12 is arranged on the rear wall of the cooling box body, and the other end of the temperature sensor is connected with the device controller 7; one end of the device controller 7 is connected with a temperature sensor, and the other end of the device controller is connected with a front-end valve 14 of the cooling liquid cooler and a front-end valve 13 of the cooling liquid heater to control the flow of the pipeline; the solid-liquid separator 10 is arranged at the upper part of the cooling liquid containing barrel 11 and is used for separating the cooling liquid from the pill-shaped solid;
one end of the cooling liquid overflow pipeline 4 is connected with the cooling liquid overflow port, and the other end of the cooling liquid overflow pipeline is connected with the cooling liquid storage barrel 11; one end of the high-temperature cooling liquid pipeline 3 is connected with a high-temperature cooling liquid inlet, and the other end of the high-temperature cooling liquid pipeline is connected with a cooling liquid heater 9; one end of the low-temperature cooling liquid pipeline 2 is connected with a low-temperature cooling liquid inlet, and the other end of the low-temperature cooling liquid pipeline is connected with a cooling liquid cooler 8; the cooling liquid circulating pipe 5 is connected with one end of the circulating pump 6 from the cooling liquid storage barrel 11, and then is divided into two branches after being connected with the other end of the circulating pump, one branch is connected with one end of the cooling liquid heater 9 through the front end valve 13 of the cooling liquid heater, and the other branch is connected with one end of the cooling liquid cooler 8 through the front end valve 14 of the cooling liquid cooler.
The method comprises the following specific operations: first, a cooling box having a temperature gradient is constructed. Setting an upper limit temperature and a lower limit temperature in an apparatus controller 7, setting a time required for finishing the introduction for 20min, and then starting the operation, wherein the apparatus controller opens a front end valve 13 of a cooling liquid heater, a circulating pump outlet valve 15, closes a front end valve 14 of the cooling liquid cooler and a cooling liquid outlet valve 16, injects a normal temperature cooling liquid into a cooling liquid storage barrel 11, starts a circulating pump 6, and pumps the cooling liquid into the cooling liquid heater 9 from the cooling liquid storage barrel 11, wherein the flow rate is controlled by setting the power of the circulating pump 6 and the opening degree of the front end valve 13 of the cooling liquid heater by the apparatus controller 7, the cooling liquid enters the cooling liquid heater 9, is heated to the lower limit temperature, and then starts to be injected into the cooling tank, the power of the heater 9 is changed by the apparatus controller 7 at the time, the temperature of the cooling liquid flowing through the cooling liquid heater 9 is required to be gradually increased, and the temperature increase rate is (upper limit temperature-lower, this process is continued until the desired height of implant is achieved.
When different temperature gradients are required, the device controller 7 inputs corresponding upper and lower temperature limits, and the power of the coolant heater 9 can be automatically controlled to meet different conditions. When a different introduction time is required, the circulation pump 6 and the coolant heater front end valve 13 are controlled to change the introduction time.
After production begins, the front end valve 13 of the cooling liquid heater is closed, the front end valve 14 of the valve cooling liquid cooler, the outlet valve 15 of the circulating pump and the outlet valve 16 of the cooling liquid are opened, namely, the cooling circulation of the equipment is started, the flow of the cooling liquid entering the cooling tank is larger than the flow of the cooling liquid leaving the cooling tank through an outlet controlled by the outlet valve 16 by controlling the opening degree of the front end valve 14 of the valve cooling liquid cooler and the opening degree of the outlet valve 16 of the cooling liquid and the power of the circulating pump 6, so that overflow is formed on the upper part of the cooling tank, wherein the overflow quantity is controlled by the device controller 7, and the overflow process can effectively enable the injected low-temperature cooling liquid to balance the heat brought by the hot liquid drops dripped on the upper part, and maintain the temperature.
The temperature sensor in this embodiment can be selected from: the armored PT100 temperature sensor has, for example, the model number kz.p0.685.m2014. The valve can be selected from: the Hanteng CPVC electric butterfly valve, the CPVC electric ball valve, the resultant electric PVC butterfly valve LQ1-10 and the like. The circulating pump can be selected as follows: an IS50-32-160A circulating pump and a coal-moistening YGRY type circulating pump. The cooling liquid heater can be selected from: the model of the liquid heater BLGD-5 of the middle rubbing is oil bath heating or water bath heating. The cooling liquid cooler can be selected from: double pipe heat exchanger, plate heat exchanger. The device controller may be selected from: an electric control cabinet or a Taida PLC control cabinet and the like of a new Jazz company with the model number of XJK 2.5.5-2-S.
The utility model discloses the nothing is mentioned the part and is applicable to prior art.
Claims (4)
1. A cooling device capable of quickly forming temperature gradient comprises a cooling box body, a cooling liquid storage barrel, a solid-liquid separator, a circulating pump and a device controller, wherein a cooling liquid overflow port is formed in the side wall of the upper part of the cooling box body; the cooling liquid overflow port is connected with the cooling liquid storage barrel through a cooling liquid overflow pipeline; the solid-liquid separator is arranged at the upper part of the cooling liquid storage barrel, and the inlet of the solid-liquid separator is connected with the cooling liquid outlet of the cooling liquid box body through a cooling liquid outlet valve; the method is characterized in that:
the side wall of the cooling box body close to the lower part of the cooling liquid overflow port is provided with a high-temperature cooling liquid inlet, the device also comprises a cooling liquid heater and a cooling liquid cooler, and a plurality of temperature sensors are arranged in the cooling box body along the height direction; the outlet of the cooling liquid storage barrel is connected with one end of a circulating pump through a cooling liquid circulating pipe, the other end of the circulating pump is divided into two branches after passing through an outlet valve of the circulating pump, one branch is connected with one end of a cooling liquid heater through a front valve of the cooling liquid heater, and the other branch is connected with one end of a cooling liquid cooler through a front valve of the cooling liquid cooler;
the other end of the cooling liquid heater is connected with a high-temperature cooling liquid inlet through a high-temperature cooling liquid pipeline; the other end of the cooling liquid cooler is connected with a low-temperature cooling liquid inlet through a low-temperature cooling liquid pipeline;
the temperature sensors, the front end valve of the cooling liquid cooler, the front end valve of the cooling liquid heater, the circulating pump, the outlet valve of the circulating pump, the cooling liquid heater, the cooling liquid cooler and the cooling liquid outlet valve are connected with the device controller.
2. The cooling device for rapidly forming a temperature gradient according to claim 1, wherein the cooling liquid heater adopts a heat tracing band or a heating coil; the cooling liquid cooler adopts a sleeve pipe type, shell-and-tube type, plate type or spiral plate type heat exchanger.
3. The cooling device for rapidly forming a temperature gradient according to claim 1, wherein a plurality of temperature sensors are arranged at equal intervals in the cooling box body.
4. The cooling device for rapidly forming a temperature gradient according to claim 1, wherein the number of the low-temperature coolant inlets and the high-temperature coolant inlets is an even number.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920999988.5U CN210090996U (en) | 2019-07-01 | 2019-07-01 | Cooling device capable of quickly forming temperature gradient |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920999988.5U CN210090996U (en) | 2019-07-01 | 2019-07-01 | Cooling device capable of quickly forming temperature gradient |
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| CN210090996U true CN210090996U (en) | 2020-02-18 |
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| CN201920999988.5U Active CN210090996U (en) | 2019-07-01 | 2019-07-01 | Cooling device capable of quickly forming temperature gradient |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110209225A (en) * | 2019-07-01 | 2019-09-06 | 天津中新药业集团股份有限公司第六中药厂 | A kind of cooling device of quick formation temperature gradient |
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2019
- 2019-07-01 CN CN201920999988.5U patent/CN210090996U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110209225A (en) * | 2019-07-01 | 2019-09-06 | 天津中新药业集团股份有限公司第六中药厂 | A kind of cooling device of quick formation temperature gradient |
| CN110209225B (en) * | 2019-07-01 | 2024-04-02 | 津药达仁堂集团股份有限公司第六中药厂 | Cooling device capable of rapidly forming temperature gradient |
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Address after: 300401 Tianjin city Beichen District North Light Patentee after: Jinyao Darentang Group Co.,Ltd. No 6 Chinese Medicine Factory Address before: 300401 Tianjin city Beichen District North Light Patentee before: No. 6 Traditional Chinese Medicine Factory of Tianjin Zhongxin Pharmaceutical Group Co.,Ltd. |
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