Oxygen bomb calorimeter and liquid path thereof

Abstract

The utility model relates to the technical field of calorific value detection, and particularly discloses an oxygen bomb calorimeter and a liquid path thereof.The liquid path of the oxygen bomb calorimeter comprises a liquid storage tank, a first pump, a refrigerator, an outer barrel, a second pump, a heater, a first valve, an inner barrel and a second valve, and the first pump and the refrigerator are connected between an outlet and an inlet of the liquid storage tank; the second pump and the heater are connected between the inlet and the outlet of the outer barrel, the first valve is connected between the first pump and the inlet of the outer barrel and used for connecting or disconnecting the first pump and the outer barrel, and the second valve is connected between the first pump and the inlet of the inner barrel and used for connecting or disconnecting the first pump and the inner barrel. According to the oxygen bomb calorimeter and the liquid path, the outer barrel and the liquid storage tank of the oxygen bomb calorimeter provided by the invention, self-circulation temperature control can be realized, and different target temperatures can be respectively controlled. During testing, the outer barrel does not participate in the liquid storage tank and the inner barrel, and the testing efficiency is improved. And the liquid path is simple in structure and few in parts.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat quantity detection, and more particularly to an oxygen bomb calorimeter and a liquid circuit thereof. BACKGROUND

[0002] The oxygen bomb calorimeter is an instrument for measuring the heat of combustion of a substance that can be completely burned in high-pressure oxygen. It mainly includes full-automatic oxygen bomb calorimeter, oxygen bomb calorimeter, and oxygen bomb calorimeter, etc. Its characteristic is to use oxygen as a combustion-supporting agent, and to measure the heat released by the complete combustion of a substance in high-pressure oxygen to evaluate the heat of the substance.

[0003] The common oxygen bomb calorimeter includes a water storage tank, an inner barrel and an outer barrel in a sleeve, and uses water as a medium, and an oxygen bomb (a high-temperature, high-pressure, and high-corrosion sealed container) is immersed therein. The oxygen bomb calorimeter is an instrument for measuring the heat of combustion of a substance that can be completely burned in high-pressure oxygen. It mainly includes full-automatic oxygen bomb calorimeter, oxygen bomb calorimeter, and oxygen bomb calorimeter, etc. Its characteristic is to use oxygen as a combustion-supporting agent, and to measure the heat released by the complete combustion of a substance in high-pressure oxygen to evaluate the heat of the substance.

[0004] The water storage tank is a water storage unit of the oxygen bomb calorimeter, which is generally connected with the atmosphere. Since the inner barrel needs to be replaced with water every time, and the temperature of the inner barrel water rises after each test, in order to make the test speed and efficiency higher, the water tank needs to be provided with a self-circulation and heating and refrigeration temperature control function. In addition, the water tank can be connected with the outer barrel through corresponding water pipes, water pumps and valves to realize the water inlet function of the outer barrel; the water tank can also be connected with the inner barrel through corresponding water pipes, water pumps and valves to realize the functions of water inlet, water outlet and water quantity of the inner barrel.

[0005] In the process of implementing the present application, the inventors have found that at least the following problems exist in the prior art:

[0006] The outer barrel water of the common oxygen bomb calorimeter is not completely isolated, and during the test, the outer barrel water enters the inner barrel, or after the test, the inner barrel water enters the water tank and the outer barrel, so that the outer barrel is difficult to recover to the original temperature and stabilize in a short time, which has a certain negative impact on the constant temperature performance of the outer barrel and the test efficiency. Practical new type content

[0007] Therefore, the purpose of the present application is to provide an oxygen bomb calorimeter and a liquid circuit thereof, which can effectively solve the problem that the outer barrel and the inner barrel of the oxygen bomb calorimeter are not completely isolated and thus affect the test.

[0008] In order to achieve the above object, the present application provides the following technical solutions:

[0009] A liquid circuit of an oxygen bomb calorimeter comprises:

[0010] A self-circulation loop of a liquid storage tank comprises the liquid storage tank, a first pump and a refrigerator, the first pump and the refrigerator are connected between an outlet and an inlet of the liquid storage tank, and the refrigerator is used to cool the liquid in the liquid storage tank to below room temperature.

[0011] A self-circulation loop of an outer drum comprises the outer drum, a second pump and a heater, the second pump and the heater are connected between an inlet and an outlet of the outer drum, and the heater is used to heat the liquid in the outer drum to above room temperature.

[0012] An inlet liquid circuit of the outer drum comprises the first pump and a first valve connected between the first pump and the inlet of the outer drum, the first valve is used to connect or disconnect the first pump and the outer drum, and when the first pump and the outer drum are connected, the first pump is used to pump the liquid in the liquid storage tank to the outer drum.

[0013] An inlet liquid circuit of the inner drum is used to add a certain amount of liquid in the liquid storage tank to the inner drum, and the inlet liquid circuit of the inner drum comprises the inner drum, the first pump, and a second valve connected between the first pump and the inlet of the inner drum, the second valve is used to connect or disconnect the first pump and the inner drum, and when the first pump and the inner drum are connected, the first pump is used to pump the liquid in the liquid storage tank to the inner drum.

[0014] Optionally, in the liquid circuit of the oxygen bomb calorimeter, the inlet liquid circuit of the inner drum further comprises a third valve and a measuring cup, the third valve and the measuring cup are connected between the first pump and the second valve in sequence.

[0015] When the second valve disconnects the measuring cup and the inner drum, and the third valve connects the first pump and the measuring cup, the first pump is used to pump the liquid in the liquid storage tank to the measuring cup, and the measuring cup is used to measure a certain amount of the liquid to be added to the inner drum.

[0016] Optionally, in the liquid circuit of the oxygen bomb calorimeter, the height of the measuring cup is higher than the height of the inner drum, so that when the second valve connects the measuring cup and the inner drum, the certain amount of the liquid in the measuring cup flows into the inner drum.

[0017] Optionally, in the liquid circuit of the oxygen bomb calorimeter, the measuring cup is provided with an overflow port, and the overflow port of the measuring cup is connected with the liquid storage tank.

[0018] Optionally, the liquid circuit of the oxygen bomb calorimeter comprises a liquid level detection device arranged in the inner barrel, the liquid level detection device is configured to detect the liquid level in the inner barrel, and the second valve is configured to disconnect the first pump from the inner barrel when the liquid level detection device detects that the liquid level in the inner barrel reaches a preset liquid level.

[0019] Optionally, the liquid circuit of the oxygen bomb calorimeter comprises an overflow port arranged in the outer barrel, and the overflow port of the outer barrel is in communication with the liquid storage tank.

[0020] Optionally, the liquid circuit of the oxygen bomb calorimeter comprises a liquid discharge valve arranged in the inner barrel, the liquid discharge valve is in communication with the liquid storage tank through a liquid discharge pump, the liquid discharge valve is configured to connect or disconnect the inner barrel from the liquid discharge pump, and the liquid discharge pump is configured to pump the liquid in the inner barrel to the liquid storage tank when the liquid discharge valve is opened.

[0021] Optionally, the first valve and the second valve are both normally closed two-position two-way electromagnetic valves.

[0022] Optionally, the first pump and the second pump are both magnetic circulation pumps.

[0023] The oxygen bomb calorimeter and the liquid circuit thereof provided in the present application can realize independent temperature control of the outer barrel and the liquid storage tank through the temperature control liquid circuit, that is, the two can be independently controlled at different target temperatures. During the test, the first valve disconnects the connection between the first pump and the outer barrel, that is, the outer barrel is completely isolated from the inner barrel, and the outer barrel does not participate in the liquid storage tank and the inner barrel, thereby realizing the liquid circuit isolation and independent temperature control of the outer barrel, and thus the test is not affected. After the test, the liquid with the increased temperature of the inner barrel only returns to the liquid storage tank, which does not affect the temperature control of the outer barrel, and the test efficiency is improved. Moreover, the liquid circuit structure is simple, and only one refrigerator and one heater are needed to realize the independent temperature control of the outer barrel and the liquid storage tank. The cooperation of the first valve and the second valve can realize the isolation of the outer barrel, the number of parts is small, the connection structure is simple, and thus the preparation and maintenance costs are reduced. In addition, the low-temperature liquid in the liquid storage tank can be supplemented into the outer barrel or the liquid with a higher temperature in the outer barrel can be supplemented into the liquid storage tank through the start and stop of the first valve combined with the first pump, so as to supplement the temperature control capacity of the outer barrel and the liquid storage tank.

[0024] In order to achieve the above-mentioned purpose, the present application also provides an oxygen bomb calorimeter comprising any one of the above-mentioned liquid circuits. Since the above-mentioned liquid circuit has the above-mentioned technical effects, the oxygen bomb calorimeter with the liquid circuit should also have corresponding technical effects. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below only illustrate some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0026] Figure 1 It is a schematic diagram of a liquid circuit of a calorimeter in the prior art.

[0027] Figure 2 It is a schematic diagram of another liquid circuit of a calorimeter in the prior art.

[0028] Figure 3 It is a schematic diagram of a liquid circuit of an oxygen bomb calorimeter in one embodiment of the present application.

[0029] Figure 4 It is a schematic diagram of a liquid circuit of an oxygen bomb calorimeter in another embodiment of the present application.

[0030] Reference signs:

[0031] 011-outer barrel; 012-inner barrel; 013-liquid storage tank; 014-total liquid inlet valve; 015-inner barrel liquid inlet valve; 016-backflow valve; 017-in-line pump; 018-circulating pump; 019-refrigerator; 020-heater;

[0032] 11-liquid storage tank; 12-first pump; 13-refrigerator; 14-outer barrel; 15-second pump; 16-heater; 17-first valve; 18-inner barrel; 19-second valve; 20-third valve; 21-measuring cup; 22-drainage pump. DETAILED DESCRIPTION

[0033] The embodiments of the present application disclose an oxygen bomb calorimeter and a liquid circuit thereof, so as to realize complete isolation between an outer barrel and an inner barrel through a simple structure and improve detection efficiency.

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0035] Figure 1The liquid circuit of the calorimeter is shown. Two normally open electromagnetic valves are arranged on the pipeline connecting the liquid storage tank 013 and the outer barrel 011. The liquid storage tank 013 has a self-circulation temperature control function to make the water temperature of the outer barrel 011 consistent with that of the liquid storage tank 013. During testing, the total liquid inlet valve 014 and the inner barrel liquid inlet valve 015 are opened, and the backflow valve 016 is closed (opened). The liquid in the liquid storage tank 013 enters the inner barrel 012 through the in-line pump 017 and the inner barrel liquid inlet valve 015. When the liquid volume in the inner barrel 012 reaches a predetermined amount, the inner barrel liquid inlet valve 015 is closed, and the backflow valve 016 is opened (closed) to restore the water circulation between the outer barrel 011 and the liquid storage tank 013. After the test is completed, the total liquid inlet valve 014 is closed (opened), the in-line pump 017 and the inner barrel liquid inlet valve 015 are opened, and the liquid in the inner barrel 012 returns to the liquid storage tank 013. After completion, the liquid circulation between the outer barrel 011 and the liquid storage tank 013 is restored.

[0036] However, this scheme has the following disadvantages: the outer barrel 011 and the liquid storage tank 013 are connected in circulation for most of the time, and the temperature is controlled synchronously. The liquid in the outer barrel 011 participates in the inner barrel 012 during each test, so the liquid circuit of the outer barrel 011 is not independent. During testing, the liquid (high-temperature liquid) in the inner barrel 012 enters the liquid storage tank 013 and the outer barrel 011, making it difficult for the outer barrel 011 to restore the original temperature and stabilize in a short time, which has a certain negative impact on the constant temperature performance of the outer barrel 011 and the test efficiency.

[0037] Figure 2 Another liquid circuit of the calorimeter is shown. The liquid storage tank 013 is provided with a circulating pump 018 for self-circulation temperature control, and is connected with a heater 020 and a cooler 019. The outer barrel 011 is also provided with a circulating pump 018 for independent self-circulation temperature control, and is also connected with a heater 020 and a cooler 019. When the outer barrel 011 is filled with water, the water inlet pump and the outer barrel valve are opened to realize water filling of the outer barrel 011. During testing, the water inlet pump and the inner barrel valve are opened. When the liquid volume in the inner barrel 012 reaches a predetermined amount, the inner barrel valve is closed. After the test is completed, the liquid in the inner barrel 012 is discharged back to the liquid storage tank 013 through the inner barrel drain valve and the diaphragm pump. During the test, the outer barrel 011 of the liquid circuit does not exchange with the liquid in the inner barrel 012 or the liquid storage tank 013, and the liquid circuit of the outer barrel 011 is completely isolated from the liquid circuit of the liquid storage tank 013.

[0038] However, this scheme has the following disadvantages: the outer barrel 011 and the liquid storage tank 013 are connected with a heater 020 and a cooler 019 for temperature control, respectively, and a large number of electromagnetic valves and liquid pumps are used. That is, the liquid circuit uses a large number of components, is complex, and has a high cost.

[0039] In order to at least partially solve the above-mentioned defects, the present application provides a liquid circuit of an oxygen bomb calorimeter. The preferred embodiments of the present application are described below. Figure 3 and Figure 4 The preferred embodiments of the present application are described below.

[0040] In some examples, the application provides a liquid circuit of an oxygen bomb calorimeter, which includes a self-circulation loop of a liquid storage tank 11, a self-circulation loop of an outer barrel 14, a liquid inlet circuit of the outer barrel 14, and a liquid inlet circuit of an inner barrel. The self-circulation loop of the liquid storage tank 11 includes the liquid storage tank 11, a first pump 12, and a refrigerator 13. The first pump 12 and the refrigerator 13 are connected between the outlet and the inlet of the liquid storage tank 11. The refrigerator 13 is used to cool the liquid in the liquid storage tank 11 to below room temperature. Specifically, the liquid storage tank 11, the first pump 12, and the refrigerator 13 can be connected by a pipeline. For example, the first pump 12 and the refrigerator 13 are connected in sequence between the outlet and the inlet of the liquid storage tank 11. When the first pump 12 is started, the liquid in the liquid storage tank 11 can be discharged through the outlet of the liquid storage tank 11, cooled by the refrigerator 13, and then flowed back to the liquid storage tank 11 through the inlet of the liquid storage tank 11. In this way, the circulation of the liquid in the self-circulation loop of the liquid storage tank 11 is realized, so as to cool the liquid in the self-circulation loop of the liquid storage tank 11, thereby achieving temperature control of the liquid in the liquid storage tank 11. The liquid in the liquid storage tank 11 is cooled to below room temperature by the refrigerator 13, i.e., the target set temperature of the liquid storage tank 11 is lower than room temperature, so that the temperature control process does not need to be heated. In some cases, if it is necessary to heat the liquid in the liquid storage tank 11, the first valve 17 can be opened, and the first pump 12 is started to pump the liquid with a higher temperature in the outer barrel 14 into the liquid storage tank 11, so as to increase the temperature of the liquid in the liquid storage tank 11.

[0041] The self-circulation loop of the outer barrel 14 includes the outer barrel 14, a second pump 15, and a heater 16. The second pump 15 and the heater 16 are connected between the inlet and the outlet of the outer barrel 14. The heater 16 is used to heat the liquid in the outer barrel 14 to above room temperature. Specifically, the outer barrel 14, the second pump 15, and the heater 16 can be connected by a pipeline. For example, the second pump 15 and the heater 16 are connected in sequence between the outlet and the inlet of the outer barrel 14. When the second pump 15 is started, the liquid in the outer barrel 14 can be discharged through the outlet of the outer barrel 14, cooled by the heater 16, and then flowed back to the outer barrel 14 through the inlet of the outer barrel 14. In this way, the circulation of the liquid in the self-circulation loop of the outer barrel 14 is realized, so as to heat the liquid in the self-circulation loop of the outer barrel 14, thereby achieving temperature control of the liquid in the outer barrel 14.

[0042] The liquid inlet path of the outer barrel includes the first pump 12 and the first valve 17 connected between the first pump 12 and the inlet of the outer barrel 14. The first valve 17 is used to connect or disconnect the first pump 12 and the outer barrel 14. When the first pump 12 is in communication with the outer barrel 14, the first pump 12 is used to pump the liquid in the liquid storage tank 11 into the outer barrel 14. The liquid inlet path of the outer barrel is used to inject liquid into the outer barrel 14, which shares the first pump 12 with the self-circulation loop of the liquid storage tank 11. Specifically, the outlet of the liquid storage tank 11 is in communication with one end of the first pump 12, and the other end of the first pump 12 is in communication with the inlet of the first valve 17 and the inlet of the refrigerator 13, respectively. When the first pump 12 is started and the first valve 17 is opened, the liquid in the liquid storage tank 11 can enter the outer barrel 14 through the first pump 12. After the water in the outer barrel 14 is filled, the first valve 17 is closed, and the liquid in the outer barrel 14 is isolated from the liquid in the liquid storage tank 11. At this time, the second pump 15 and the heater 16 can be opened, and the outer barrel 14 is self-circulated to control the temperature, so that the temperature of the liquid in the outer barrel 14 is heated to be higher than the room temperature, that is, the set temperature of the outer barrel 14 is higher than the room temperature, so that the outer barrel 14 does not need to be cooled by the refrigerator. In some cases, if the outer barrel 14 needs to be cooled, the first valve 17 can be opened, and the first pump 12 is started to pump the liquid with a lower temperature in the liquid storage tank 11 into the outer barrel 14 to reduce the temperature of the liquid in the outer barrel 14.

[0043] The liquid inlet path of the inner barrel is used to add a certain amount of liquid in the liquid storage tank 11 into the inner barrel 18. The liquid inlet path of the inner barrel includes the first pump 12 and the second valve 19 connected between the first pump 12 and the inlet of the inner barrel 18. The second valve 19 is used to connect or disconnect the first pump 12 and the inner barrel 18. When the first pump 12 is in communication with the inner barrel 18, the first pump 12 is used to pump the liquid in the liquid storage tank 11 into the inner barrel 18. The liquid inlet path of the inner barrel is used to inject a certain amount of liquid into the inner barrel 18, which shares the first pump 12 with the self-circulation loop of the liquid storage tank 11. Specifically, the outlet of the liquid storage tank 11 is in communication with one end of the first pump 12, and the other end of the first pump 12 is in communication with the inlet of the first valve 17, the inlet of the second valve 19 and the inlet of the refrigerator 13, respectively. During testing, the first pump 12 is started, and the second valve 19 is opened. The liquid in the liquid storage tank 11 can enter the inner barrel 18 through the first pump 12. After the water in the inner barrel 18 is filled, the second valve 19 is closed. After the test is completed, the liquid in the inner barrel 18 can be discharged, and the liquid can be recharged for the next measurement.

[0044] The liquid path of the oxygen bomb calorimeter provided in the application can realize self-circulation temperature control of the outer barrel 14 and the liquid storage tank 11 through the temperature control liquid path, that is, the two can realize independent temperature control and can be controlled at different target temperatures. During the test, the first valve 17 disconnects the connection between the first pump 12 and the outer barrel 14, that is, the outer barrel 14 is completely isolated from the inner barrel 18, and the outer barrel 14 does not participate in the liquid storage tank 11 and the inner barrel 18, realizing the liquid path isolation and independent temperature control of the outer barrel 14, so as not to affect the test. After the test is completed, the liquid with the temperature of the inner barrel 18 rising only returns to the liquid storage tank 11, which does not affect the temperature control of the outer barrel 14, thereby improving the test efficiency. Moreover, the liquid path structure is simple, and only one refrigerator 13 and one heater 16 are needed to realize the independent temperature control of the outer barrel 14 and the liquid storage tank 11. The first valve 17 and the second valve 19 cooperate to realize the isolation of the outer barrel 14, the number of parts is small, the connection structure is simple, and the preparation and maintenance costs are reduced. In addition, the first valve 17 can be started and stopped in combination with the first pump 12 to supplement the low-temperature liquid in the liquid storage tank 11 into the outer barrel 14, or to supplement the liquid with a higher temperature in the outer barrel 14 into the liquid storage tank 11, so as to supplement the temperature control capacity of the outer barrel 14 and the liquid storage tank 11.

[0045] Specifically, the target temperature of the outer barrel 14 temperature control can be set slightly higher than the ambient temperature according to the standard requirements, and the temperature control is realized through the heater 16 connected in series in the self-circulation loop of the outer barrel 14. When the temperature control is higher than the target temperature of the outer barrel 14, the first valve 17 is started and stopped to control the water inflow of the liquid storage tank 11 into the outer barrel 14, so that the temperature control of the outer barrel 14 returns to the target temperature. The target temperature of the liquid storage tank 11 temperature control can be set slightly lower than or equal to the ambient temperature according to the standard requirements, and the temperature control is realized through the refrigerator 13 connected in series in the self-circulation loop of the liquid storage tank 11. When the temperature control is lower than the target temperature of the liquid storage tank 11, the first valve 17 is started and stopped to control the water inflow of the outer barrel 14 back to the liquid storage tank 11, so that the temperature control of the liquid storage tank 11 returns to the target temperature.

[0046] When the inner barrel 18 is filled with liquid, the amount of liquid in the inner barrel 18 needs to be controlled, that is, the inner barrel 18 is quantitatively filled with liquid. Specifically, the quantitatively filled liquid can be realized by the way of the measuring cup 21 or by the way of setting a liquid level detection device in the inner barrel 18. In the way of using the measuring cup 21, the above-mentioned liquid filling of the inner barrel 18 can be that the liquid in the liquid storage tank 11 is filled into the inner barrel 18 through the measuring cup 21. In the way of using the liquid level detection device, the above-mentioned liquid filling of the inner barrel 18 can be that the liquid in the liquid storage tank 11 is directly filled into the inner barrel 18. The following will be described by taking two embodiments as examples.

[0047] Please refer to Figure 3In one embodiment, the liquid is quantitatively fed by the way of the measuring cup 21. The liquid feeding path of the inner tub further comprises the third valve 20 and the measuring cup 21, which are connected in sequence between the first pump 12 and the second valve 19. The third valve 20 and the measuring cup 21 are further arranged in the pipeline of the specific liquid feeding path of the inner tub. The third valve 20 is connected between the outlet of the first pump 12 and the inlet of the measuring cup 21, and the outlet of the measuring cup 21 is connected to the inner tub 18. The first pump 12 is used to pump the liquid in the liquid tank 11 to the measuring cup 21 when the second valve 19 disconnects the measuring cup 21 from the inner tub 18 and the third valve 20 connects the first pump 12 and the measuring cup 21. The measuring cup 21 is used to measure the liquid to be added to the inner tub 18. Specifically, during the test, the first pump 12 and the third valve 20 are first opened, the first pump 12 pumps the liquid in the liquid tank 11 to the measuring cup 21, i.e. the measuring cup 21 is filled with liquid, and the measuring cup 21 is used to measure the liquid to be added to the inner tub 18, i.e. the third valve 20 is closed when the liquid in the measuring cup 21 reaches the target amount, the second valve 19 is opened, and the liquid in the measuring cup 21 flows into the inner tub 18. The measuring cup 21 can be used to conveniently measure the liquid in a specific amount, and the specific amount can be controlled according to the scale of the measuring cup 21, or different measuring cups 21 with different volumes can be replaced to adjust the amount.

[0048] In some embodiments, the height of the measuring cup 21 is higher than the height of the inner tub 18, so that when the second valve 19 connects the measuring cup 21 and the inner tub 18, the liquid in the measuring cup 21 flows into the inner tub 18. By arranging the measuring cup 21 above the inner tub 18, when the second valve 19 is opened to connect the measuring cup 21 and the inner tub 18, the liquid in the measuring cup 21 can automatically flow into the inner tub 18 under the action of its own gravity. As arranged above, the liquid in the measuring cup 21 can be injected into the inner tub 18 without the need for a power component. In other embodiments, a liquid pump can also be arranged between the measuring cup 21 and the inner tub 18 to pump the liquid in the measuring cup 21 to the inner tub 18.

[0049] In some embodiments, the measuring cup 21 is provided with an overflow port, and the overflow port of the measuring cup 21 is connected to the liquid tank 11. During the test, the third valve 20 is opened, the liquid in the liquid tank 11 enters the measuring cup 21 until the measuring cup 21 is full, and the excess liquid overflows back to the liquid tank 11. At the same time, the first valve 17 can be controlled to be opened to allow the liquid in the liquid tank 11 to enter the outer tub 14, keeping the outer tub 14 full. By arranging the overflow port in the measuring cup 21, the liquid can be directly controlled by the overflow corresponding to the amount of liquid in the measuring cup 21 during the liquid filling process.

[0050] Please refer to Figure 4In another embodiment, the liquid is quantitatively added by setting a liquid level detection device in the inner barrel 18. This embodiment is different from the above-mentioned embodiment of adding liquid quantitatively by the measuring cup 21. In this embodiment, the measuring cup 21 is not arranged in the liquid inlet path of the inner barrel, but a liquid level detection device is arranged in the inner barrel 18 to detect the liquid level in the inner barrel 18, and the second valve 19 is arranged to be closed when the liquid level detection device detects that the liquid level in the inner barrel 18 reaches a preset liquid level. That is, by arranging the liquid level detection device, the liquid level in the inner barrel 18 can be detected, so that when the liquid level reaches the preset liquid level, it indicates that the amount of liquid in the inner barrel 18 reaches the corresponding amount, and the second valve 19 can be closed to stop adding liquid. By arranging the liquid level detection device, the structure of the liquid inlet path of the inner barrel is further simplified. The liquid level detection device can be a probe.

[0051] In some embodiments, referring to Figure 3 and Figure 4 , the outer barrel 14 is provided with an overflow port, and the overflow port of the outer barrel 14 is in communication with the liquid storage tank 11. Specifically, the overflow port of the outer barrel 14 is in communication with the liquid storage tank 11 through an overflow pipe. By arranging the overflow port on the outer barrel 14, when the outer barrel 14 is filled with liquid, the liquid in the liquid storage tank 11 is pumped to the outer barrel 14 by the first pump 12, and then overflowed back to the liquid storage tank 11 when the outer barrel 14 is full. As described above, the liquid can be directly added to the outer barrel 14 to fill the outer barrel 14. Specifically, the first valve 17 is used for adding liquid to the outer barrel 14, and the liquid in the outer barrel 14 is returned to the liquid storage tank 11 through the overflow pipe of the outer barrel 14 when the outer barrel 14 is full, and no other valve is arranged for adding water to the outer barrel 14.

[0052] In some embodiments, the inner barrel 18 is provided with a liquid discharge valve, and the liquid discharge valve is in communication with the liquid storage tank 11 through a liquid discharge pump 22. The liquid discharge valve is used to communicate or disconnect the inner barrel 18 and the liquid discharge pump 22, and the liquid discharge pump 22 is used to pump the liquid in the inner barrel 18 to the liquid storage tank 11 when the liquid discharge valve is opened. By arranging the liquid discharge valve on the inner barrel 18 and cooperating with the liquid discharge pump 22, the liquid in the inner barrel 18 can be discharged after the test is completed. The liquid discharge pump 22 is started to pump the liquid in the inner barrel 18 back to the liquid storage tank 11. The liquid in the liquid storage tank 11 can be controlled in temperature by a self-circulation loop of the liquid storage tank to meet the requirements of the next test. Specifically, the liquid discharge pump 22 can be a diaphragm pump, that is, the liquid cannot flow when the diaphragm pump is not started, and the liquid can flow from the inner barrel 18 to the liquid storage tank 11 when the diaphragm pump is started.

[0053] In some embodiments, the first valve 17 and the second valve 19 are both two-position two-way electromagnetic valves, and specifically can be normally closed two-position two-way electromagnetic valves. Taking the first valve 17 as an example, the two ports of the first valve 17 are connected with the first pump 12 and the outer barrel 14 respectively, when the first valve 17 is in the first position, the two ports of the first valve 17 are disconnected, so that the first pump 12 and the outer barrel 14 are disconnected; when the first valve 17 is in the second position, the two ports of the first valve 17 are connected, so that the first pump 12 and the outer barrel 14 are connected. The connection of the second valve 19 is similar to that of the first valve 17, which will not be described here. The two-position two-way electromagnetic valve has a simple structure, and one electromagnetic valve can realize on-off control. In addition, the electromagnetic valve can be connected with the controller to facilitate automatic control. In other embodiments, the first valve 17 and the second valve 19 can also use an electromagnetic valve group equivalent to the two-position two-way electromagnetic valve.

[0054] In some embodiments, the first pump 12 and the second pump 15 are both magnetic circulation pumps. The magnetic circulation pump can flow bidirectionally when it is not turned on.

[0055] Based on the liquid path provided in the above embodiments, the application also provides an oxygen bomb calorimeter, which comprises any one of the liquid paths in the above embodiments. Since the oxygen bomb calorimeter adopts the liquid path in the above embodiments, the beneficial effects of the oxygen bomb calorimeter refer to the above embodiments.

[0056] The oxygen bomb calorimeter provided by the application has the following temperature control of the liquid path when in use:

[0057] The first pump and the refrigerator are turned on to circulate the liquid in the liquid storage tank in the liquid storage tank self-circulation loop and cool the liquid to a first set temperature, wherein the first set temperature is lower than the room temperature;

[0058] The first valve connects the first pump and the outer barrel, the first pump is turned on to pump the liquid in the liquid storage tank to the outer barrel, and when the liquid in the outer barrel reaches a preset amount, the first valve disconnects the first pump and the outer barrel to isolate the outer barrel from the liquid storage tank;

[0059] The heater and the second pump are turned on to circulate the liquid in the outer barrel in the outer barrel self-circulation loop and heat the liquid to a second set temperature, wherein the second set temperature is higher than the room temperature;

[0060] The first pump is turned on, the first valve disconnects the first pump and the outer barrel, the second valve connects the first pump and the inner barrel, and the first pump pumps the liquid in the liquid storage tank to the inner barrel.

[0061] The liquid circuit control method, before testing, when the liquid in the liquid storage tank needs to be cooled, the refrigerator is turned on, and the liquid storage tank self-circulation loop realizes temperature control of the liquid in the liquid storage tank, so that the liquid is reduced to a first set temperature, which is lower than the room temperature, and the specific value can be set according to the needs, which is not limited here. Of course, when the temperature of the liquid storage tank meets the first set temperature, the above temperature control step is not needed. After the temperature of the liquid storage tank reaches the first set temperature, the first valve connects the liquid storage tank and the outer tub, and the liquid in the liquid storage tank is pumped to the outer tub by the first pump. When the liquid in the outer tub reaches a preset amount, the first valve disconnects the first pump and the outer tub, so that the liquid storage tank and the outer tub are disconnected. The liquid in the outer tub reaching the preset amount can be the amount of liquid in the outer tub corresponding to the height of the overflow port of the outer tub, that is, the excess liquid in the outer tub flows back to the liquid storage tank through the overflow port, so that the amount of liquid in the outer tub is quantified. After the liquid is filled into the outer tub, when the liquid in the outer tub needs to be heated, the heater is turned on, and the outer tub self-circulation loop realizes temperature control of the liquid in the outer tub, so that the liquid rises to a second set temperature, which is higher than the room temperature, and the specific value can be set according to the needs, which is not limited here.

[0062] After the liquid is filled into the outer tub or at the same time, the liquid can be filled into the inner tub, that is, the second valve connects the liquid storage tank and the inner tub, and the liquid in the liquid storage tank is pumped to the inner tub by the first pump. The liquid level sensor arranged in the inner tub or the measuring cup cooperated with the inner tub is used to realize the quantitative liquid filling of the inner tub. After the liquid is filled into the inner tub, the corresponding test can be performed.

[0063] After the test is completed, the liquid in the inner tub can flow back to the liquid storage tank through the liquid discharge valve, and the temperature of the liquid in the liquid storage tank is correspondingly increased. According to the needs, the refrigerator can be turned on, and the liquid storage tank self-circulation loop realizes temperature control of the liquid in the liquid storage tank, so that the liquid is reduced to the first set temperature again for the next test.

[0064] The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts of each embodiment can be referred to each other.

[0065] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A liquid circuit of an oxygen bomb calorimeter, characterized by comprising: The application relates to a liquid supply system for a washing machine, comprising: a storage tank self-circulation loop, which comprises a storage tank (11), a first pump (12) and a refrigerator (13), the first pump (12) and the refrigerator (13) being connected between the outlet and the inlet of the storage tank (11), and the refrigerator (13) being used for cooling the liquid in the storage tank (11) to below room temperature; an outer drum self-circulation loop, which comprises an outer drum (14), a second pump (15) and a heater (16), the second pump (15) and the heater (16) being connected between the inlet and the outlet of the outer drum (14), and the heater (16) being used for heating the liquid in the outer drum (14) to above room temperature; an outer drum liquid inlet liquid path, which comprises the first pump (12) and a first valve (17) connected between the first pump (12) and the inlet of the outer drum (14), the first valve (17) being used for connecting or disconnecting the first pump (12) and the outer drum (14), and when the first pump (12) and the outer drum (14) are connected, the first pump (12) is used for pumping the liquid in the storage tank (11) to the outer drum (14); an inner drum liquid inlet liquid path, which is used for adding a certain amount of liquid in the storage tank (11) to an inner drum (18), and the inner drum liquid inlet liquid path comprises the inner drum (18), the first pump (12), a second valve (19) connected between the first pump (12) and the inlet of the inner drum (18), the second valve (19) being used for connecting or disconnecting the first pump (12) and the inner drum (18), and when the first pump (12) and the inner drum (18) are connected, the first pump (12) is used for pumping the liquid in the storage tank (11) to the inner drum (18).

2. The liquid circuit of the oxygen bomb calorimeter according to claim 1, wherein The inner drum liquid inlet liquid path further comprises a third valve (20) and a measuring cup (21), the third valve (20) and the measuring cup (21) being connected between the first pump (12) and the second valve (19) in sequence; the first pump (12) is used for pumping the liquid in the storage tank (11) to the measuring cup (21) when the second valve (19) disconnects the measuring cup (21) and the inner drum (18), and the third valve (20) connects the first pump (12) and the measuring cup (21), and the measuring cup (21) is used for measuring a certain amount of the liquid to be added to the inner drum (18).

3. The liquid circuit of the oxygen bomb calorimeter according to claim 2, wherein The height of the measuring cup (21) is higher than the height of the inner drum (18), so that when the second valve (19) connects the measuring cup (21) and the inner drum (18), the certain amount of the liquid in the measuring cup (21) flows into the inner drum (18).

4. The liquid circuit of the oxygen bomb calorimeter according to claim 2, wherein The measuring cup (21) is provided with an overflow port, and the overflow port of the measuring cup (21) is connected with the storage tank (11).

5. The liquid circuit of a bomb calorimeter according to claim 1, wherein The inner drum (18) is provided with a liquid level detection device, the liquid level detection device is used for detecting the liquid level in the inner drum (18), and the second valve (19) is used for disconnecting the first pump (12) and the inner drum (18) when the liquid level detection device detects that the liquid level in the inner drum (18) reaches a preset liquid level.

6. The liquid circuit of a bomb calorimeter according to any one of claims 1 to 5, characterized in that The outer drum (14) is provided with an overflow port, and the overflow port of the outer drum (14) is communicated with the liquid storage tank (11).

7. The liquid circuit of a bomb calorimeter according to any one of claims 1 to 5, characterized in that The inner drum (18) is provided with a liquid discharge valve, the liquid discharge valve is communicated with the liquid storage tank (11) through a liquid discharge pump (22), the liquid discharge valve is used for connecting or disconnecting the inner drum (18) and the liquid discharge pump (22), and the liquid discharge pump (22) is used for pumping the liquid in the inner drum (18) to the liquid storage tank (11) when the liquid discharge valve is opened.

8. The liquid circuit of a bomb calorimeter according to claim 1, wherein The first valve (17) and the second valve (19) are both normally closed two-position two-way electromagnetic valves.

9. The liquid circuit of a bomb calorimeter according to claim 1, wherein The first pump and the second pump are both magnetic circulation pumps.

10. An oxygen bomb calorimeter characterized by A liquid circuit comprising a liquid circuit according to any one of claims 1-8.

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