A double bag feeding nutrition pump

Abstract

The present invention discloses a double-bag feeding nutrient pump, comprising: an infusion pipeline mechanism, an infusion transmission mechanism, and a pipeline control mechanism. Among them, the infusion transmission mechanism comprises a stepper motor and a turntable structure; the turntable structure comprises: an infusion turntable, a cleaning turntable, and an extrusion vibration ring. The middle connecting pipeline surrounds the infusion turntable, the extrusion vibration ring is sleeved on the outer periphery of the infusion turntable, and the middle connecting pipeline passes through the channel between the infusion turntable and the extrusion vibration ring; the stepper motor rotates forward, thereby driving the infusion turntable to rotate forward; the stepper motor rotates reversely, thereby driving the infusion turntable and the cleaning turntable to rotate in the opposite direction, and the cleaning turntable prompts the extrusion vibration ring to squeeze and vibrate the middle connecting pipeline. A double-bag feeding nutrient pump of the present invention, especially the structure of the infusion transmission mechanism is improved, which can more effectively rinse the viscous nutrient solution remaining in the pipeline.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, in particular to a double-bag feeding nutrient pump. Background Art

[0002] The prior art (2022109966873) discloses a double-bag feeding nutrient pump with automatic flushing function, whose infusion pipeline mechanism includes: a flushing pipeline, a nutrient pipeline, an intermediate connecting pipeline, and an output pipeline. The flushing pipeline, the nutrient pipeline, and the intermediate connecting pipeline are connected by a tee, and the intermediate connecting pipeline and the output pipeline are connected by a two-way piece. The flushing pipeline, the intermediate connecting pipeline and the output pipeline are connected to form a flushing channel, and the nutrient pipeline, the intermediate connecting pipeline and the output pipeline are connected to form a feeding channel.

[0003] The working principle of the above-mentioned double bag feeding nutrition pump with automatic flushing function is as follows:

[0004] One end of the flushing line is connected to the flushing bag, and one end of the nutrition line is connected to the nutrition bag. The flushing bag is filled with flushing liquid, and the nutrition bag is filled with nutrient solution. The flushing liquid in the flushing bag is circulated through the flushing channel formed by the flushing line, the intermediate connecting line and the output line to flush the line. The nutrient solution in the nutrition bag is circulated through the feeding channel formed by the nutrition line, the intermediate connecting line and the output line to feed the patient. When turning on the equipment, the nutrition infuser is correctly installed. At this time, under the control of the line control mechanism, the flushing line and the nutrition line are closed at the same time. The infusion parameters, such as flow rate, preset volume, flushing volume and flushing interval, are set, and the infusion is started. At this time, under the control of the line control mechanism, Under the condition of nutrition infusion, when the infusion time reaches the interval time of flushing, the machine will close the nutrition pipeline and open the flushing pipeline channel under the control of the pipeline control mechanism, and start to infuse the flushing liquid under the action of the infusion transmission mechanism; the equipment infuses the flushing liquid according to the setting, and when the flushing volume reaches the set value, the machine will close the flushing pipeline and open the nutrition pipeline under the control of the pipeline control mechanism, and restart the infusion of the nutrition liquid under the action of the infusion transmission mechanism, thus completing an automatic flushing process; the machine repeats the above steps according to the parameter settings to complete the automatic flushing task of the entire infusion process.

[0005] The above-mentioned double-bag feeding nutrition pump with automatic flushing function has an automatic flushing function, which can automatically complete the flushing function of the pipeline and the patient's intestines, thereby greatly reducing the workload of medical staff and improving treatment efficiency and nursing effects.

[0006] The above-mentioned double-bag feeding nutrient pump with automatic flushing function has an infusion transmission mechanism including a stepper motor and a turntable provided at the output end of the stepper motor. The intermediate connecting pipeline surrounds the turntable, and the infusion transmission mechanism is used for the infusion of flushing liquid and nutrient solution. Through the precise control of the stepper motor, the turntable is driven to roll, thereby squeezing the intermediate connecting pipeline to achieve accurate infusion of nutrient solution and flushing liquid.

[0007] It can be seen that the middle connecting pipeline will be deformed by the squeezing of the turntable, and the deformed middle connecting pipeline will further squeeze the nutrient solution in the pipeline, so that part of the nutrient solution is firmly adhered to the pipe wall, causing difficulties in subsequent flushing. During the flushing process, the pipeline is simply flushed by infusing flushing liquid, and the flushing pressure of the flushing liquid is limited, making it difficult to flush the viscous nutrient solution remaining in the pipe wall. Therefore, how to further optimize and improve the structure of the above-mentioned double-bag feeding nutrient pump on the basis of the existing technology, so as to more effectively flush the residual nutrient solution in the pipeline, this is a technical problem that needs to be solved. Summary of the invention

[0008] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a double-bag feeding nutrient pump that can more effectively flush out the viscous nutrient solution remaining in the pipeline.

[0009] The objective of the present invention is achieved through the following technical solutions:

[0010] A double-bag feeding nutrient pump, comprising: an infusion pipeline mechanism, an infusion transmission mechanism, and a pipeline control mechanism;

[0011] The infusion pipeline mechanism comprises: a flushing pipeline, a nutrition pipeline, an intermediate connecting pipeline, and an output pipeline; the flushing pipeline, the nutrition pipeline, and the intermediate connecting pipeline are connected by a tee, and the intermediate connecting pipeline and the output pipeline are connected by a two-way piece; the flushing pipeline, the intermediate connecting pipeline, and the output pipeline are connected to form a flushing channel; the nutrition pipeline, the intermediate connecting pipeline, and the output pipeline are connected to form a feeding channel;

[0012] The infusion transmission mechanism is used to provide infusion power for the infusion pipeline mechanism; the pipeline control mechanism controls the opening and closing of the flushing channel and the feeding channel;

[0013] The infusion transmission mechanism includes a stepping motor and a turntable structure; the turntable structure includes: an infusion turntable, a cleaning turntable, and an extrusion vibration ring;

[0014] The intermediate connecting pipeline surrounds the infusion turntable, the extrusion vibration ring is sleeved on the outer periphery of the infusion turntable, and the intermediate connecting pipeline passes through the channel between the infusion turntable and the extrusion vibration ring;

[0015] The stepper motor rotates forward, thereby driving the infusion turntable to rotate forward; the stepper motor rotates reversely, thereby driving the infusion turntable and the cleaning turntable to rotate in the opposite direction, and the cleaning turntable prompts the extrusion vibration ring to squeeze and vibrate the intermediate connecting pipeline.

[0016] In one embodiment,

[0017] The edge of the cleaning turntable is provided with a concave-convex guide ring groove;

[0018] A plurality of extrusion vibration rods are distributed in a circular array at the edge of the extrusion vibration ring. The extrusion vibration rods have a fixed end and a movable end. The fixed end is hinged to the edge of the extrusion vibration ring, and the movable end is inserted into the concave-convex guide ring groove.

[0019] In one of the embodiments, the output end of the stepper motor is connected to the cleaning turntable via a one-way driving module.

[0020] In one embodiment, the one-way driving module comprises: a one-way driving shaft, a movable ball;

[0021] A receiving cavity is provided at the center of the cleaning turntable, the one-way drive shaft is received in the receiving cavity, a movable groove is formed between the edge of the one-way drive shaft and the cavity wall of the receiving cavity, the movable ball is received in the movable groove, and the movable groove has a narrow end and a wide end;

[0022] The output end of the stepper motor is drivingly connected to the unidirectional driving shaft.

[0023] In one embodiment, the pipeline control mechanism includes: a control motor and a cam connected to the output end of the control motor; the cam is used to squeeze or disconnect the flushing pipeline, and the cam is used to squeeze or disconnect the nutrition pipeline.

[0024] In one of the embodiments, a temperature sensor is provided on the outer wall of the output pipeline, and the temperature sensor determines whether the pipeline is blocked by temperature changes.

[0025] The double-bag feeding nutrient pump of the present invention improves the structure of the infusion transmission mechanism, and can more effectively flush out the viscous nutrient solution remaining in the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 This is an overall structural diagram of a double-bag feeding nutrient pump according to an embodiment of the present invention;

[0028] Figure 2 for Figure 1 The internal structure diagram of the double bag feeding nutrient pump shown;

[0029] Figure 3 for Figure 2 Front view of the double bag feeding nutrition pump shown;

[0030] Figure 4 for Figure 2 The rear view of the double bag feeding nutrition pump shown;

[0031] Figure 5 for Figure 2 An exploded view of a double bag feeding nutrient pump is shown;

[0032] Figure 6 for Figure 5 The local structure diagram of

[0033] Figure 7 for Figure 6 The structural diagram of the two-way piece shown;

[0034] Figure 8 for Figure 2 An exploded view of the infusion drive mechanism shown;

[0035] Fig. 9 for Figure 8 A partial view of the infusion transmission mechanism shown;

[0036] Fig.10 for Fig. 9 A partial cross-sectional view of the extrusion vibration ring shown;

[0037] Fig.11 It is a structural diagram of the connection between the output end of the stepper motor and the cleaning turntable through a one-way drive module;

[0038] Fig.12 for Fig.11 The structural diagram of the unidirectional drive module shown;

[0039] Fig.13 This is a structural diagram of a temperature sensor installed on the outer wall of the output pipeline. DETAILED DESCRIPTION

[0040] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0041] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0043] like Figure 1 , Figure 2 and Figure 3 As shown, the present invention discloses a double-bag feeding nutrient pump 10, comprising: an infusion pipeline mechanism 100, an infusion transmission mechanism 200, and a pipeline control mechanism 300 (such as Figure 5 as shown).

[0044] like Figure 5 As shown, the infusion pipeline mechanism 100 includes: a flushing pipeline 110, a nutrition pipeline 120, an intermediate connecting pipeline 130, and an output pipeline 140. The flushing pipeline 110, the nutrition pipeline 120, and the intermediate connecting pipeline 130 are connected by a tee 150, and the intermediate connecting pipeline 130 and the output pipeline 140 are connected by a two-way piece 160. The flushing pipeline 110, the intermediate connecting pipeline 130, and the output pipeline 140 are connected to form a flushing channel; the nutrition pipeline 120, the intermediate connecting pipeline 130, and the output pipeline 140 are connected to form a feeding channel.

[0045] The infusion transmission mechanism 200 is used to provide infusion power for the infusion pipeline mechanism 100 .

[0046] The pipeline control mechanism 300 controls the on-off of the flushing channel and the feeding channel. In the present invention, the pipeline control mechanism 300 includes: a control motor 301 (such as Figure 4) and a cam 310 (as shown) connected to the output end of the control motor 301 Figure 5 As shown); the cam 310 is used to squeeze or disconnect the flushing line 110, and the cam 310 is used to squeeze or disconnect the nutrition line 120.

[0047] like Figure 8 and Fig. 9 As shown, the infusion transmission mechanism 200 includes a stepper motor 201 (such as Figure 4 The turntable structure includes: an infusion turntable 210, a cleaning turntable 220, and an extrusion vibration ring 230.

[0048] like Figure 8 As shown, the intermediate connecting pipeline 130 surrounds the infusion turntable 210 , the extrusion vibration ring 230 is sleeved on the outer periphery of the infusion turntable 210 , and the intermediate connecting pipeline 130 passes through the channel between the infusion turntable 210 and the extrusion vibration ring 230 .

[0049] The stepper motor rotates forward, thereby driving the infusion turntable 210 to rotate forward; the stepper motor rotates reversely, thereby driving the infusion turntable 210 and the cleaning turntable 220 to rotate in the opposite direction, and the cleaning turntable 220 prompts the extrusion vibration ring 230 to squeeze and vibrate the intermediate connecting pipeline 130.

[0050] like Fig. 9 and Fig.10 As shown, specifically, a concave-convex guide ring groove 221 is opened on the edge of the cleaning turntable 220; a plurality of extrusion vibration rods 231 are distributed in a circular array on the edge of the extrusion vibration ring 230, and the extrusion vibration rod 231 has a fixed end 232 and a movable end 233, the fixed end 232 is hinged to the edge of the extrusion vibration ring 231, and the movable end 233 is inserted into the concave-convex guide ring groove 221.

[0051] like Fig.11 As shown, the output end of the stepper motor is connected to the cleaning turntable 220 via a one-way driving module 240.

[0052] Next, the working principle of the double bag feeding nutrient pump 10 of the above structure is described:

[0053] The double-bag feeding nutrient pump of the present invention needs to be used in conjunction with a nutrient infusion device, which includes a flushing bag and a nutrient bag;

[0054] One end of the flushing line 110 is connected to the flushing bag, and one end of the nutrition line 120 is connected to the nutrition bag. The flushing bag is filled with flushing liquid, and the nutrition bag is filled with nutrition liquid.

[0055] The flushing liquid in the flushing bag is circulated through the flushing channel formed by the flushing pipeline 110, the intermediate connecting pipeline 130 and the output pipeline 140 to flush the pipeline;

[0056] The nutrient solution in the nutrient bag is circulated through the feeding channel formed by the nutrient pipeline 120, the intermediate connecting pipeline 130 and the output pipeline 140 to feed the patient;

[0057] When the device is turned on, the nutrition infusion device is correctly installed; at this time, under the control of the pipeline control mechanism 300, the flushing pipeline 110 and the nutrition pipeline 120 are closed at the same time;

[0058] Set infusion parameters, such as flow rate, preset volume, flushing volume and flushing interval, and start infusion; at this time, under the control of the pipeline control mechanism 300, the machine will close the flushing pipeline 110, open the nutrition pipeline 120, and start infusing the nutrient solution under the action of the infusion transmission mechanism 200 (stepping motor forward rotation);

[0059] In the state of nutrition infusion, when the infusion time reaches the flushing interval time, under the control of the pipeline control mechanism 300, the nutrition pipeline 120 is closed, and the flushing pipeline 110 is opened to infuse the flushing liquid. When the flushing channel has a certain amount of flushing liquid, the nutrition pipeline 120 and the flushing pipeline 110 are closed at the same time;

[0060] Then, the stepper motor reverses, thereby driving the infusion turntable 210 and the cleaning turntable 220 to rotate in the opposite direction at the same time (the cleaning turntable 220 is reversed under the action of the one-way driving module 240). During the reverse rotation of the cleaning turntable 220, the cleaning turntable 220 will prompt the extrusion vibration ring 230 to squeeze and vibrate the intermediate connecting pipe 130; specifically, the concave-convex guide ring groove 221 provided on the edge of the cleaning turntable 220 will actuate the movable end 233 of the extrusion vibration rod 231, thereby causing the extrusion vibration rod 231 to bounce back and forth around the fixed end 232, and the reciprocating extrusion vibration rod 231 will reciprocate and squeeze the intermediate connecting pipe 130, thereby better squeezing and removing the viscous nutrient solution remaining on the inner wall of the intermediate connecting pipe 130;

[0061] It should be noted that, since the nutrition line 120 and the flushing line 110 have been closed, the flushing liquid will not flow back into the flushing bag and the nutrition bag;

[0062] After the preset time is reached, the stepper motor rotates forward again, and at the same time, under the control of the pipeline control mechanism 300, the nutrition pipeline 120 is closed, the flushing pipeline 110 is opened, and the flushing liquid flows through the flushing channel to clean the pipeline in a normal mode;

[0063] When the cleaning reaches the designated time, under the control of the pipeline control mechanism 300, the flushing pipeline 110 is closed, the nutrition pipeline 120 is opened, the stepper motor still rotates forward, and the infusion of nutrient solution is restarted. At this point, an automatic flushing process is completed.

[0064] Next, the specific structure of the unidirectional driving module 240 is described:

[0065] like Fig.12 As shown, specifically, the one-way driving module 240 includes: a one-way driving shaft 241, and a movable ball 242. The central position of the cleaning turntable 220 is provided with a receiving cavity 222 (such as Fig. 9 As shown in FIG. 2 , the one-way drive shaft 241 is received in the receiving cavity 222, and a movable groove 223 is formed between the edge of the one-way drive shaft 241 and the cavity wall of the receiving cavity 222. The movable ball 242 is received in the movable groove 223, and the movable groove 223 has a narrow end 2231 and a wide end 2232. The output end of the stepper motor is drivingly connected to the one-way drive shaft 241.

[0066] When the stepper motor drives the one-way driving shaft 241 to rotate clockwise, the narrow end 2231 will squeeze the movable ball 242, and the squeezed movable ball 242 will then drive the cleaning turntable 220 to rotate clockwise; when the stepper motor drives the one-way driving shaft 241 to rotate counterclockwise, the wide end 2232 will push the movable ball 242. Since the movable ball 242 has enough space to move, the movable ball 242 will not drive the cleaning turntable 220 to rotate counterclockwise; it can be seen that the entire one-way driving module 240 has the characteristic of one-way rotation.

[0067] It can be seen that when the stepper motor rotates in the forward direction, the one-way drive module 240 will not trigger the cleaning turntable 220 to rotate, and the entire double-bag feeding nutrient pump can be normally flushed or fed; when the stepper motor rotates in the reverse direction, it will trigger the cleaning turntable 220 to rotate through the one-way drive module 240, thereby squeezing and vibrating the viscous nutrient solution remaining on the inner wall of the middle connecting pipe 130, making the subsequent normal flushing process smoother.

[0068] In addition, the structure of the one-way drive module 240 of the present invention is silent, and does not use a ratchet pawl like a traditional one-way drive structure. When a traditional ratchet pawl structure is used, a "clicking" sound will be emitted regardless of forward or reverse rotation, which is very noisy and has a poor effect.

[0069] like Figure 5 and Figure 6 As shown, in the present invention, a pressure sensor 170 is also provided at the position corresponding to the output pipeline 140, and a Hall sensor 180 is provided near the intermediate connecting pipeline 130 of the two-way piece 160. The Hall sensor 180 is used to detect whether the pipeline is installed in place. The design of the entire pipeline reflects the role of a dedicated pipe. A pressure block 410 is provided at the compartment door 400 of the nutrition pump, and a convex point 161 (such as Figure 7As shown in the figure, when the door 400 is closed, its pressing block 410 will be pressed on the two-way piece 160, and the two-way piece 160 will hold the output pipeline 140 on the pressure sensor 170 through the convex point 161. When the pipeline is blocked, the tube will expand and then transmit to the pressure sensor 170. The pressure sensor 170 senses the pressure holding signal. The convex point 161 ensures that the pipeline and the pressure sensor are in close contact and the pressure data is accurate, otherwise the machine cannot be started. In addition, the design of the two-way piece 160 ensures that the convex point 161 can be aligned with the pressure sensor 170. Without this convex point 161, the pipeline cannot contact the pressure sensor 170 and the machine cannot be started.

[0070] The pressure sensor at the output pipeline 140 is mainly used to detect whether the pipeline is blocked. The detection principle is: the pressure sensor is pressed against the outer wall of the output pipeline. When the pipeline is blocked, the pipeline will swell, and the bulging pipeline will trigger the pressure sensor to generate an alarm. However, in practice, the above technical solution of setting a pressure sensor is very prone to misjudgment. When the pipeline is pulled by external force, it will trigger the pressure sensor and cause misjudgment. The pressure of the liquid transported in the pipeline is sometimes unstable and will also trigger the pressure sensor and cause misjudgment.

[0071] The inventors found that the nutrient solution has a certain temperature (for example, between 30°C and 40°C). When the pipeline is blocked, the nutrient solution will not flow smoothly, so the temperature at the output pipeline 140 will drop to room temperature (for example, around 22°C). For this reason, the inventors specially set a temperature sensor 141 (for example, a temperature sensor 142) on the outer wall of the output pipeline 140. Fig.13 As shown in FIG. 1 ), the temperature sensor 141 determines whether the pipeline is blocked by temperature changes. Moreover, the temperature sensor 141 only needs to be set at the output port of the output pipeline 140 to detect the entire pipeline. On the other hand, when the pressure sensor is blocked at the intermediate connecting pipeline 130, for example, it will only expand in the pipeline before the intermediate connecting pipeline 130, and the entire pipeline will not expand, so the pressure sensor cannot accurately detect it. Moreover, the expansion of the pipeline also requires a large delivery pressure, which is not easy to achieve.

[0072] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A double bag feeding nutrient pump, comprising: Infusion pipeline mechanism, infusion transmission mechanism, pipeline control mechanism; The infusion pipeline mechanism comprises: a flushing pipeline, a nutrition pipeline, an intermediate connecting pipeline, and an output pipeline; the flushing pipeline, the nutrition pipeline, and the intermediate connecting pipeline are connected by a tee, and the intermediate connecting pipeline and the output pipeline are connected by a two-way piece; the flushing pipeline, the intermediate connecting pipeline, and the output pipeline are connected to form a flushing channel; the nutrition pipeline, the intermediate connecting pipeline, and the output pipeline are connected to form a feeding channel; The infusion transmission mechanism is used to provide infusion power for the infusion pipeline mechanism; the pipeline control mechanism controls the opening and closing of the flushing channel and the feeding channel; It is characterized in that The infusion transmission mechanism includes a stepping motor and a turntable structure; the turntable structure includes: an infusion turntable, a cleaning turntable, and an extrusion vibration ring; The intermediate connecting pipeline surrounds the infusion turntable, the extrusion vibration ring is sleeved on the outer periphery of the infusion turntable, and the intermediate connecting pipeline passes through the channel between the infusion turntable and the extrusion vibration ring; The stepper motor rotates forward, thereby driving the infusion turntable to rotate forward; the stepper motor rotates reversely, thereby driving the infusion turntable and the cleaning turntable to rotate in the opposite direction, and the cleaning turntable causes the extrusion vibration ring to squeeze and vibrate the intermediate connecting pipeline; The edge of the cleaning turntable is provided with a concave-convex guide ring groove; A plurality of extrusion vibration rods are distributed in a circular array at the edge of the extrusion vibration ring. The extrusion vibration rods have a fixed end and a movable end. The fixed end is hinged to the edge of the extrusion vibration ring, and the movable end is inserted into the concave-convex guide ring groove.

2. The double bag feeding nutrient pump according to claim 1, characterized in that: The output end of the stepper motor is connected to the cleaning turntable via a one-way driving module.

3. The double bag feeding nutrient pump according to claim 2, characterized in that: The one-way driving module comprises: a one-way driving shaft and a movable ball; A receiving cavity is provided at the center of the cleaning turntable, the one-way drive shaft is received in the receiving cavity, a movable groove is formed between the edge of the one-way drive shaft and the cavity wall of the receiving cavity, the movable ball is received in the movable groove, and the movable groove has a narrow end and a wide end; The output end of the stepper motor is drivingly connected to the unidirectional driving shaft.

4. The double bag feeding nutrient pump according to claim 1, characterized in that: The pipeline control mechanism includes: a control motor and a cam connected to the output end of the control motor; the cam is used to squeeze or disconnect the flushing pipeline, and the cam is used to squeeze or disconnect the nutrition pipeline.

5. The double bag feeding nutrient pump according to claim 1, characterized in that: A temperature sensor is provided on the outer wall of the output pipeline, and the temperature sensor determines whether the pipeline is blocked by temperature changes.

Images