Liquid storage device and mold temperature controller

Abstract

The utility model discloses a liquid storage device and a mold temperature controller. The liquid storage device comprises a liquid storage tank, a first liquid level sensor, a second liquid level sensor, a drainage pipe, a pressure relief electromagnetic valve, a water supplementing pipe and a water supplementing electromagnetic valve. The first liquid level sensor is arranged on the liquid storage tank and located at the first height position of the liquid storage tank. The second liquid level sensor is arranged on the liquid storage tank and located at a third height position of the liquid storage tank, and the third height position is lower than the first height position; one end of the drainage pipe is connected to a second height position of the liquid storage tank and communicated with the interior of the liquid storage tank, and the second height position is higher than the third height position and lower than the first height position; the pressure relief electromagnetic valve is arranged on the drainage pipe and is electrically connected with the first liquid level sensor; one end of the water supplementing pipe is connected to the liquid storage tank and is communicated with the interior of the liquid storage tank; the water supplementing electromagnetic valve is arranged on the water supplementing pipe and electrically connected with the second liquid level sensor.

Description

Technical Field

[0001] This application relates to the technical field of temperature control equipment, and particularly to a liquid storage device and a mold temperature controller. Background Art

[0002] In the injection molding industry, in order to pursue the product quality of injection molded products, a mold temperature controller is generally used to control the temperature of the production mold. The mold temperature controller is connected to the pipeline inside the mold. The mold temperature controller transmits the medium to the pipeline inside the mold to adjust the temperature of the mold. In the related art, a liquid storage tank for storing the medium is arranged in front of the pump of the mold temperature controller to ensure that the pump sucks in only liquid medium, ensure the stability of the operation of the mold temperature controller, and can play a protective role for the pump. However, as the temperature of the medium increases, the volume of the medium will increase. If the liquid storage tank is full of the medium or there is a large amount of the medium stored, there is no space for the medium to expand. When the medium expands, the internal pressure of the liquid storage tank will increase rapidly, which is likely to cause damage to the mold temperature controller. Summary of the Utility Model

[0003] This application aims to at least solve one of the technical problems existing in the prior art. For this purpose, this application provides a liquid storage device that can detect the volume of the medium in the liquid storage tank and adjust the volume of the medium in the liquid storage tank in a timely manner.

[0004] This application also provides a mold temperature controller with the above-mentioned liquid storage device.

[0005] The liquid storage device according to the first aspect embodiment of this application includes: a liquid storage tank, a first liquid level sensor, a second liquid level sensor, a drain pipe, a pressure relief solenoid valve, a water supply pipe, and a water supply solenoid valve.

[0006] The liquid storage tank is used for storing the medium; the first liquid level sensor is arranged in the liquid storage tank and is located at the first height position of the liquid storage tank. The first liquid level sensor is used to sense the state at the first height position in the liquid storage tank; the second liquid level sensor is arranged in the liquid storage tank and is located at the third height position of the liquid storage tank. The second liquid level sensor is used to sense the state at the third height position in the liquid storage tank. The third height position is lower than the first height position; one end of the drain pipe is connected to the second height position of the liquid storage tank and is communicated with the inside of the liquid storage tank. The second height position is higher than the third height position and lower than the first height position; the pressure relief solenoid valve is arranged on the drain pipe. The pressure relief solenoid valve is electrically connected to the first liquid level sensor and is used to control the opening and closing of the drain pipe; one end of the water supply pipe is connected to the liquid storage tank and is communicated with the inside of the liquid storage tank; the water supply solenoid valve is arranged on the water supply pipe. The water supply solenoid valve is electrically connected to the second liquid level sensor and is used to control the opening and closing of the water supply pipe.

[0007] The liquid storage device according to the embodiment of the first aspect of the present application has at least the following beneficial effects: By the first liquid level sensor sensing the liquid level state at the first height position of the liquid storage tank, when the liquid level height of the medium in the liquid storage tank reaches the first height position, the first liquid level sensor cooperates with the drain pipe and the pressure relief solenoid valve to discharge a certain amount of the medium in the liquid storage tank, so as to ensure that there is enough space in the liquid storage tank for the medium to expand, so as to avoid damage to the liquid storage tank caused by the rapid expansion of the medium. In addition, the drain pipe is connected to the second height position of the liquid storage tank, and the second height position is higher than the third height position and lower than the first height position, ensuring that the volume of the medium will not be lower than the third height position, so as to ensure that there is enough medium in the liquid storage tank for the mold temperature machine to operate normally. By the second liquid level sensor sensing the liquid level state at the third height position of the liquid storage tank, when the liquid level height of the medium in the liquid storage tank is lower than the third height position, the second liquid level sensor cooperates with the water replenishing pipe and the water replenishing solenoid valve to replenish a certain amount of medium into the liquid storage tank, so as to ensure that there is sufficient medium in the liquid storage tank for the mold temperature machine using the liquid storage device of the present application to operate normally.

[0008] According to some embodiments of the present application, it further includes a buffer structure, and the buffer structure is communicated with the liquid storage tank, and the buffer structure is used for temporarily storing the medium.

[0009] According to some embodiments of the present application, the buffer structure includes a housing and an airbag, the airbag is arranged in the housing, a sealed chamber is formed between the outer wall of the airbag and the inner wall of the housing, nitrogen gas is used to fill the sealed chamber, and the airbag is communicated with the liquid storage tank.

[0010] According to some embodiments of the present application, the bottom of the liquid storage tank is communicated with the airbag.

[0011] According to some embodiments of the present application, the buffer structure is connected to the fourth height position of the liquid storage tank, and the fourth height position is lower than the third height position.

[0012] According to some embodiments of the present application, one end of the water replenishing pipe is connected to the bottom of the liquid storage tank.

[0013] According to some embodiments of the present application, the liquid storage tank is provided with a water outlet and a water inlet, the water outlet is located at the fifth height position of the liquid storage tank, the water inlet is located at the sixth height position of the liquid storage tank, and the fifth height position is lower than the sixth height position.

[0014] According to some embodiments of the present application, both the fifth height position and the sixth height position are lower than the third height position.

[0015] The mold temperature machine according to the embodiment of the second aspect of the present application includes the liquid storage device of the embodiment of the first aspect.

[0016] The mold temperature controller according to the embodiment of the second aspect of the present application has at least the following beneficial effects: It includes all the beneficial effects of the liquid storage device in the embodiment of the first aspect, which will not be elaborated here.

[0017] According to some embodiments of the present application, it further includes a heat exchange device and a water storage device. The heat exchange device includes a first heat exchange pipeline and a second heat exchange pipeline. The water inlet end of the first heat exchange pipeline is used to communicate with the mold, and the water outlet end of the first heat exchange pipeline is communicated with the liquid storage tank. And the water inlet end of the second heat exchange pipeline is communicated with the water outlet end of the water storage device, the water outlet end of the second heat exchange pipeline is communicated with the other end of the drain pipe, and they are both communicated with the water inlet end of the water storage device.

[0018] The additional aspects and advantages of the present application will be partially given in the following description, partially become apparent from the following description, or be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The following further describes the present application with reference to the drawings and embodiments, where:

[0020] Figure 1 is a schematic structural diagram of the mold temperature controller according to the embodiment of the second aspect of the present application;

[0021] Figure 2 is a schematic structural diagram of the mold temperature controller according to the embodiment of the second aspect of the present application in another direction;

[0022] Figure 3 is Figure 1 a cross-sectional view of a partial structure diagram of the mold temperature controller in;

[0023] Figure 4 is Figure 1 a cross-sectional view of the buffer structure in.

[0024] Reference numerals:

[0025] Liquid storage tank 100, water outlet 110, water inlet 120;

[0026] First liquid level sensor 200;

[0027] Second liquid level sensor 300;

[0028] Drain pipe 400;

[0029] Pressure relief solenoid valve 500;

[0030] Make-up water pipe 600;

[0031] Make-up water solenoid valve 700;

[0032] Buffer structure 800, housing 810, airbag 820, sealed chamber 830;

[0033] Liquid storage device 1000, heat exchange device 2000, and pump 3000. Specific implementation mode

[0034] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application and should not be construed as a limitation of the present application.

[0035] In the description of the present application, it should be understood that with regard to the orientation description, such as the upper, lower, front, rear, left, right, etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application.

[0036] In the description of the present application, the meaning of several is more than one, and the meaning of multiple is more than two. Understandings such as greater than, less than, exceeding, etc. do not include the present number, and understandings such as above, below, within, etc. include the present number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or the sequence relationship of the indicated technical features.

[0037] In the description of the present application, unless otherwise clearly defined, words such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0038] In the description of the present application, the description referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0039] Referring to Figures 1 to 3 , the liquid storage device 1000 according to the first aspect embodiment of the present application includes: a liquid storage tank 100, a first liquid level sensor 200, a second liquid level sensor 300, a drain pipe 400, a pressure relief solenoid valve 500, a make-up water pipe 600, and a make-up water solenoid valve 700.

[0040] The liquid storage tank 100 is used to store a medium. For example, the medium is water, oil, or the like.

[0041] The first liquid level sensor 200 is disposed in the liquid storage tank 100 and is located at the first height position of the liquid storage tank 100. The first liquid level sensor 200 is used to sense the state at the first height position in the liquid storage tank 100. For example, the first height position is four-fifths of the liquid storage tank 100.

[0042] The second liquid level sensor 300 is disposed in the liquid storage tank 100 and is located at the third height position of the liquid storage tank 100. The second liquid level sensor 300 is used to sense the state at the third height position in the liquid storage tank 100, and the third height position is lower than the first height position. For example, the third height position is one-half of the liquid storage tank 100.

[0043] One end of the drain pipe 400 is connected to the second height position of the liquid storage tank 100 and is in communication with the interior of the liquid storage tank 100. The second height position is higher than the third height position and lower than the first height position. Specifically, the other end of the drain pipe 400 communicates with a water storage device or a drain pipe 400 path to facilitate the discharge of the medium in the liquid storage tank 100. For example, the second height position is two-thirds of the liquid storage tank 100.

[0044] The pressure relief solenoid valve 500 is disposed on the drain pipe 400. The pressure relief solenoid valve 500 is electrically connected to the first liquid level sensor 200 and is used to control the opening and closing of the drain pipe 400.

[0045] One end of the water supply pipe 600 is connected to the liquid storage tank 100 and is in communication with the interior of the liquid storage tank 100. Specifically, the other end of the water supply pipe 600 communicates with a water supply device so that the water supply device can supplement the medium into the liquid storage tank 100 through the water supply pipe 600.

[0046] The water supply solenoid valve 700 is disposed on the water supply pipe 600. The water supply solenoid valve 700 is electrically connected to the second liquid level sensor 300 and is used to control the opening and closing of the water supply pipe 600.

[0047] It can be understood that the liquid storage tank 100 of the present application is used as a mold temperature controller.

[0048] In some operating conditions of the mold temperature controller, the medium in the liquid storage tank 100 will continuously output and enter. As the temperature of the medium rises, the volume of the medium will increase. When the volume of the medium increases, it will cause the liquid level of the medium in the liquid storage tank 100 to rise. When the volume of the medium is higher than the first height position, the first liquid level sensor 200 will sense the medium. At this time, the first liquid level sensor 200 will transmit this signal to the pressure relief solenoid valve 500, and the pressure relief solenoid valve 500 will make the drain pipe 400 conductive, and the medium in the liquid storage tank 100 will be discharged through the drain pipe 400 to reduce the volume of the medium in the liquid storage tank 100, so that the liquid level of the medium is lower than the first height position, to ensure that there is enough space in the liquid storage tank 100 for the medium to expand, and to prevent the liquid storage tank 100 and the mold temperature controller from being damaged due to continuous expansion after the medium fills the liquid storage tank 100. Specifically, after the liquid level of the medium is lower than the first height position, the first liquid level sensor 200 will transmit a signal to the pressure relief solenoid valve 500, and the pressure relief solenoid valve 500 can immediately close the drain pipe 400 to prevent too much medium from flowing out of the liquid storage tank 100. Or, the pressure relief solenoid valve 500 can close the drain pipe 400 after a set time, so that the liquid storage tank 100 discharges more medium, leaving more space in the liquid storage tank 100 for the medium to expand, and can prevent the medium from expanding to the first height position relatively frequently. And, connect the drain pipe 400 to the second height position, making the second height position higher than the first height position and lower than the third height position, to ensure that after the medium is discharged through the drain pipe 400, the volume of the medium will not be lower than the third height position, so as to ensure that there is enough medium in the liquid storage tank 100 for the normal operation of the mold temperature controller.

[0049] In some operating conditions of the mold temperature controller, when the pressure of the mold temperature controller is relatively high, pressure relief will be carried out through the pressure relief valve. During the pressure relief process of the pressure relief valve, a certain amount of medium will be discharged, reducing the volume of the medium in the liquid storage tank 100. When the liquid level of the volume of the medium in the liquid storage tank 100 is lower than the third height position, the second liquid level sensor 300 will transmit the signal of the liquid level state at the third height position to the water replenishing solenoid valve 700, and the water replenishing solenoid valve 700 will make the water replenishing pipe 600 conductive, and the water replenishing pipe 600 will replenish the medium into the liquid storage tank 100 to increase the medium in the liquid storage tank 100, so that the volume of the medium in the liquid storage tank 100 increases until the liquid level of the medium is higher than the third height position. Then, the second liquid level sensor 300 senses that the liquid level of the medium reaches or is higher than the third height position, and transmits this signal to the water replenishing solenoid valve 700. The water replenishing solenoid valve 700 can immediately close the water replenishing pipe 600 to prevent too much medium from being stored in the liquid storage tank 100. Or, the water replenishing solenoid valve 700 can close the water replenishing pipe 600 after a set time, so that the liquid storage tank 100 replenishes enough medium, and can prevent the medium from being lower than the third height position relatively frequently.

[0050] When the mold temperature controller is not running and the liquid storage tank 100 is empty, that is, when there is no medium in the liquid storage tank 100, it is necessary to inject enough medium into the liquid storage tank 100. According to the model of the mold temperature controller and the capacity of the liquid storage tank 100, inject the corresponding volume of medium. After injecting the corresponding medium, if the second liquid level sensor 300 can sense the medium and the first liquid level sensor 200 cannot sense the medium, it means that there is no leakage in the liquid storage tank 100 and the mold temperature controller, and the liquid level of the medium is between the first height position and the third height position. At this time, the volume of the medium is good, so that there is enough medium in the liquid storage tank 100 to ensure the normal operation of the mold temperature controller, and at the same time, there is enough space in the liquid storage tank 100 for the medium to expand, so as to avoid the problem that the medium in the liquid storage tank 100 expands rapidly and causes damage to the liquid storage tank 100 and the mold temperature controller. If the second liquid level sensor 300 still cannot sense the medium after injecting a certain volume of medium, it means that there is a leakage in the liquid storage tank 100 or the mold temperature controller.

[0051] In summary, by the first liquid level sensor 200 sensing the liquid level state at the first height position of the liquid storage tank 100, when the liquid level height of the medium in the liquid storage tank 100 reaches the first height position, the first liquid level sensor 200 cooperates with the drain pipe 400 and the pressure relief solenoid valve 500 to discharge a certain amount of the medium in the liquid storage tank 100, so as to ensure that there is enough space in the liquid storage tank 100 for the medium to expand, so as to avoid damage to the liquid storage tank 100 caused by the rapid expansion of the medium. In addition, the drain pipe 400 is connected to the second height position of the liquid storage tank 100, and the second height position is higher than the third height position and lower than the first height position, ensuring that the volume of the medium will not be lower than the third height position, so as to ensure that there is enough medium in the liquid storage tank 100 for the normal operation of the mold temperature controller. By the second liquid level sensor 300 sensing the liquid level state at the third height position of the liquid storage tank 100, when the liquid level height of the medium in the liquid storage tank 100 is lower than the third height position, the second liquid level sensor 300 cooperates with the water supply pipe 600 and the water supply solenoid valve 700 to replenish a certain amount of medium into the liquid storage tank 100, so as to ensure that there is enough medium in the liquid storage tank 100 for the normal operation of the mold temperature controller using the liquid storage device 1000 of the present application.

[0052] Referring to Figure 1 、 Figure 3 and Figure 4 According to some embodiments of the present application, it further includes a buffer structure 800, and the buffer structure 800 is communicated with the liquid storage tank 100, and the buffer structure 800 is used for temporarily storing the medium.

[0053] It can be understood that when the volume of the medium in the liquid storage tank 100 suddenly increases, the pressure in the liquid storage tank 100 increases, and the medium in the liquid storage tank 100 can enter the buffer structure 800. The buffer structure 800 temporarily stores the medium to reduce the pressure in the liquid storage tank 100 and avoid excessive sharp increase in the pressure of the liquid storage tank 100, which may cause damage to the liquid storage tank 100 and the mold temperature controller. When the pressure in the liquid storage tank 100 decreases to the normal range, the medium temporarily stored in the buffer structure 800 will return to the liquid storage tank 100.

[0054] Referring to Figure 4 , according to some embodiments of the present application, the buffer structure 800 includes a housing 810 and an airbag 820. The airbag 820 is disposed inside the housing 810. A sealed chamber 830 is formed between the outer wall of the airbag 820 and the inner wall of the housing 810. The sealed chamber 830 is used to fill nitrogen, and the airbag 820 is communicated with the liquid storage tank 100.

[0055] It can be understood that when the volume of the medium in the liquid storage tank 100 suddenly increases, the medium in the liquid storage tank 100 will enter the airbag 820, and the airbag 820 temporarily stores the medium. The airbag 820 is made of a plastic material. When the medium continuously enters the airbag 820, the volume of the airbag 820 continuously increases and expands, reducing the volume of the sealed chamber 830, so that the air pressure in the sealed chamber 830 increases. When the air pressure in the sealed chamber 830 is the same as the air pressure in the liquid storage tank 100, the medium will stop entering the airbag 820 to prevent the airbag 820 from being burst due to continuous entry of the medium. After the pressure in the liquid storage tank 100 is relieved, the air pressure in the sealed chamber 830 is greater than the air pressure in the liquid storage tank 100. Thus, the sealed chamber 830 will squeeze the airbag 820, causing the airbag 820 to contract. The airbag 820 will squeeze the medium inside it back into the liquid storage tank 100 to ensure that there is enough medium in the liquid storage tank 100 without the need for refilling.

[0056] Referring to Figure 1 and Figure 4 , according to some embodiments of the present application, the liquid storage tank 100 is communicated with the bottom of the airbag 820.

[0057] It can be understood that the opening of the airbag 820 for the entry and exit of the medium faces downward. Thus, it is difficult for the medium in the liquid storage tank 100 to enter the airbag 820, so that the medium can be squeezed into the airbag 820 only when the air pressure in the liquid storage tank 100 is relatively high, avoiding insufficient medium in the liquid storage tank 100 due to excessive inhalation of the medium by the airbag 820 under normal operating conditions. And after the air pressure in the liquid storage tank 100 returns to normal, the medium in the airbag 820 can easily return to the liquid storage tank 100, and it can be ensured that all the medium in the airbag 820 can be discharged.

[0058] Referring to Figure 1 and Figure 3, according to some embodiments of the present application, the buffer structure 800 is connected to the fourth height position of the liquid storage tank 100, and the fourth height position is lower than the third height position.

[0059] It can be understood that through the cooperation of the second liquid level sensor 300, the water supply pipe 600, and the water supply solenoid valve 700, the liquid level of the medium in the liquid storage tank 100 can be made higher than the third height position. Connecting the buffer structure 800 to the fourth height position on the liquid storage tank 100 that is lower than the third height position can ensure that the medium in the liquid storage tank 100 can enter the buffer structure 800.

[0060] Refer to Figure 1 and Figure 3 , according to some embodiments of the present application, one end of the water supply pipe 600 is connected to the bottom of the liquid storage tank 100.

[0061] It can be understood that by connecting one end of the water supply pipe 600 to the bottom of the liquid storage tank 100, during the liquid filling process, the replenished medium can directly intersect with the medium in the storage tank, so that the medium in the storage tank slowly and stably increases, avoiding the position of the liquid filling pipe connection being too high, resulting in the replenished medium falling from a high place into the original medium in the liquid storage tank 100 during the liquid filling process, causing the medium to generate water splashes and turbulence, and affecting the normal operation of the mold temperature controller using the liquid storage tank 100 of the present application.

[0062] Refer to Figure 3 , according to some embodiments of the present application, the liquid storage tank 100 is provided with a water outlet 110 and a water inlet 120. The water outlet 110 is located at the fifth height position of the liquid storage tank 100, and the water inlet 120 is located at the sixth height position of the liquid storage tank 100. The fifth height position is lower than the sixth height position.

[0063] It can be understood that the liquid storage tank 100 of the present application is applied to a mold temperature controller. The medium in the liquid storage tank 100 is output to the pump 3000 of the mold temperature controller through the water outlet 110. The pump 3000 outputs the medium to the pipeline inside the mold and exchanges heat with the mold to heat the medium and cool the mold to control the temperature of the mold. The medium that has undergone heat exchange will return to the heat exchange device 2000 in the mold temperature controller, and the medium exchanges heat with air or other media through the heat exchange device 2000 to cool down. Subsequently, the medium will return to the liquid storage tank 100 through the water inlet 120 of the liquid storage tank 100. Since the sixth height position is higher than the fifth height position, setting the water inlet 120 higher than the water outlet 110 and staggering the water inlet 120 and the water outlet 110 is beneficial to the flow of the medium in the liquid storage tank 100.

[0064] Refer to Figure 3 , according to some embodiments of the present application, both the fifth height position and the sixth height position are lower than the third height position.

[0065] It is understandable that the setting height of the water outlet 110 is lower than the height of the second liquid level sensor 300 to ensure that there is a medium flowing out of the water outlet 110. Moreover, the setting height of the water inlet 120 is lower than the height of the second liquid level sensor 300 to ensure that when the medium is replenished into the liquid storage tank 100 through the water inlet 120, the replenished medium can be directly injected into the original medium in the liquid storage tank 100 to avoid the medium generating splashes or turbulence and enable the medium to flow in stably.

[0066] Refer to Figures 1 to 3 , the mold temperature controller according to the second aspect embodiment of the present application includes the liquid storage device 1000 of the first aspect embodiment.

[0067] The mold temperature controller according to the second aspect embodiment of the present application has at least the following beneficial effects: including all the beneficial effects of the liquid storage device 1000 of the first aspect embodiment, which will not be elaborated here.

[0068] Refer to Figure 2 , according to some embodiments of the present application, it further includes a heat exchange device 2000 and a water storage device. The heat exchange device 2000 includes a first heat exchange pipeline and a second heat exchange pipeline. The water inlet end of the first heat exchange pipeline is used to communicate with the mold, and the water outlet end of the first heat exchange pipeline communicates with the liquid storage tank 100; and the water inlet end of the second heat exchange pipeline communicates with the water outlet end of the water storage device, and the water outlet end of the second heat exchange pipeline communicates with the other end of the drain pipe 400 and together communicates with the water inlet end of the water storage device.

[0069] It is understandable that the heat exchange device 2000 communicates with the water inlet 120 of the liquid storage tank 100, and the heat exchange device 2000 is used to heat exchange the medium flowing back from the mold and input the heat-exchanged medium back into the liquid storage tank 100. Specifically, the medium flowing back from the mold enters the first heat exchange pipeline, and the medium in the first heat exchange pipeline exchanges heat with the medium in the second heat exchange pipeline. Then, the medium in the first heat exchange pipeline is transported to the liquid storage tank 100. Further, the medium in the liquid storage tank 100 can be transported to the pump 3000 of the mold temperature controller through its water outlet 110, and the medium is transported to the mold through the pump 3000 to exchange heat with the mold and the plastic products produced by the mold to adjust the temperature of the mold and realize the circulation of the medium. In addition, the medium in the water storage device can be transported into the second heat exchange pipeline, and after exchanging heat with the medium in the first heat exchange pipeline at the heat exchange device 2000, it returns to the water storage device to complete the circulation. Specifically, the water storage device can cool the medium, for example, by using a refrigeration device to reduce the temperature of the medium.

[0070] It can be understood that one end of the drain pipe 400 away from the liquid storage tank 100 is communicated with the water outlet end of the second heat exchange pipeline. Specifically, it is also communicated with the water inlet end of the water storage device together. Thus, when the medium is discharged from the liquid storage tank 100 through the drain pipe 400, the medium can be transported into another cycle, avoiding waste of the medium and improving the utilization rate of resources.

[0071] The embodiments of the present application have been described in detail above with reference to the accompanying drawings. However, the present application is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the purpose of the present application. In addition, the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

Claims

1. A liquid storage device, characterized in that: include: A storage tank for storing the medium; A first liquid level sensor is disposed in the liquid storage tank and is located at a first height position of the liquid storage tank, and the first liquid level sensor is used to sense the liquid level state at the first height position in the liquid storage tank; a second liquid level sensor, disposed in the liquid storage tank and located at a third height position of the liquid storage tank, the second liquid level sensor being used to sense a liquid level state at a third height position in the liquid storage tank, the third height position being lower than the first height position; a drain pipe, one end of which is connected to a second height position of the liquid storage tank and communicates with the interior of the liquid storage tank, wherein the second height position is higher than the third height position and lower than the first height position; A pressure relief solenoid valve is arranged on the drain pipe, the pressure relief solenoid valve is electrically connected to the first liquid level sensor, and is used to control the opening and closing of the drain pipe; A water supply pipe, one end of which is connected to the liquid storage tank and communicates with the interior of the liquid storage tank; A water replenishment solenoid valve is arranged on the water replenishment pipe. The water replenishment solenoid valve is electrically connected to the second liquid level sensor and is used to control the opening and closing of the water replenishment pipe.

2. The liquid storage device according to claim 1, characterized in that: It also includes a buffer structure, which is communicated with the liquid storage tank and is used for temporarily storing the medium.

3. The liquid storage device according to claim 2, characterized in that: The buffer structure includes an outer shell and an airbag, wherein the airbag is arranged in the outer shell, and a sealed chamber is formed between the outer wall of the airbag and the inner wall of the outer shell, wherein the sealed chamber is used for filling nitrogen, and the airbag is connected to the liquid storage tank.

4. The liquid storage device according to claim 3, characterized in that: The liquid storage tank is communicated with the bottom of the airbag.

5. The liquid storage device according to claim 2, characterized in that: The buffer structure is connected to a fourth height position of the liquid storage tank, and the fourth height position is lower than the third height position.

6. The liquid storage device according to claim 1, characterized in that: One end of the water supply pipe is connected to the bottom of the liquid storage tank.

7. The liquid storage device according to claim 1, characterized in that: The liquid storage tank is provided with a water outlet and a water inlet, the water outlet is located at a fifth height position of the liquid storage tank, the water inlet is located at a sixth height position of the liquid storage tank, and the fifth height position is lower than the sixth height position.

8. The liquid storage device according to claim 7, characterized in that: The fifth height position and the sixth height position are both lower than the third height position.

9. Mould temperature controller, characterized in that: Comprising the liquid storage device as claimed in any one of claims 1 to 8.

10. The mold temperature controller according to claim 9, characterized in that: It also includes a heat exchange device and a water storage device, the heat exchange device includes a first heat exchange pipeline and a second heat exchange pipeline, the water inlet end of the first heat exchange pipeline is used to communicate with the mold, and the water outlet end of the first heat exchange pipeline is connected to the liquid storage tank; and the water inlet end of the second heat exchange pipeline is connected to the water outlet end of the water storage device, and the water outlet end of the second heat exchange pipeline is connected to the other end of the drain pipe, and together with the water inlet end of the water storage device.

Images