JP6812698B2 - Heating device - Google Patents

Description

The present invention relates to a heating device, and more particularly to a heating device that heats a liquid bag.

Conventionally, a device including a heating means for heating and maintaining the peritoneal dialysate in the dialysate bag at a predetermined temperature in a chamber for accommodating the dialysate bag has been proposed (for example,). Japanese Patent Application Laid-Open No. 9-108340 (Patent Document 1)).

Japanese Unexamined Patent Publication No. 9-108340

In dialysis treatment, the patient feels uncomfortable when the temperature of the liquid supplied to the patient, such as dialysate or fluid replacement, is low. Therefore, it is necessary to bring the liquid supplied to the patient close to the patient's body temperature. Patent Document 1 proposes a device for heating a liquid bag by a heater plate that contacts the lower surface of the liquid bag. However, since the liquid bag is installed sideways, the installation space for the heating device is large. Become.

An object of the present invention is to provide a heating device that can reduce the installation space.

The heating device of the present invention is a heating device that heats a liquid bag that stores a liquid inside. The liquid bag has a liquid outflow portion through which the liquid flows out. The heating device includes a housing and a heater. The housing houses the liquid bag. The housing includes a bottom portion and a side wall portion extending upward from the bottom portion. A through hole is formed in the bottom through which the liquid outflow portion penetrates. The liquid bag housed in the housing is arranged so as to extend along the side wall portion of the housing. The heater heats the inside of the housing.

According to the above-mentioned heating device, since the liquid bag can be heated in a state of being arranged so as to extend along the side wall portion of the housing, the installation space of the heating device can be reduced.

In the above heating device, a first slit connected to a through hole is formed at the bottom of the housing. The side wall portion has a slit forming portion. The slit forming portion is formed with a second slit which is connected to the first slit and extends to the upper end of the side wall portion. As a result, the liquid bag can be easily stored in the housing.

The above-mentioned heating device further includes a pressing plate that reciprocates in the housing. The pressing plate sandwiches the liquid bag together with the side wall portion. As a result, the liquid bag is sandwiched between the side wall portion and the pressing plate, and the contact area between the heater and the liquid bag is increased. Therefore, the liquid bag can be heated efficiently.

In the above heating device, the heater is provided on the pressing plate. As a result, the liquid bag can be heated by the heater provided on the pressing plate.

In the above heating device, the heater is provided on the side wall portion. As a result, the liquid bag can be heated by the heater provided on the side wall portion.

The heating device described above further includes an urging portion. The urging portion urges the pressing plate together with the pressing plate toward the side wall portion that sandwiches the liquid bag. In this way, the liquid bag can be reliably sandwiched between the pressing plate and the side wall portion, and the liquid bag can be efficiently heated.

The heating device further includes an actuator that moves the pressing plate together with the pressing plate toward the side wall portion that sandwiches the liquid bag. By doing so, the liquid bag can be reliably sandwiched between the pressing plate and the side wall portion and can be heated efficiently.

The heating device further includes a pressing plate and a guide rail extending perpendicular to the side wall portion sandwiching the liquid bag. As a result, the pressing plate can be moved along the guide rail.

The heating device further includes a pressing plate fixing portion that regulates the movement of the pressing plate. When the liquid bag is housed in the housing, the liquid bag can be easily housed by restricting the movement of the pressing plate with the pressing plate fixing portion.

The above heating device further includes a hook for suspending the liquid bag inside the housing. This allows the liquid bag to maintain a shape that is supported by the hook and extends along the side wall.

According to the present invention, the installation space of the heating device can be reduced.

It is a circuit diagram which shows the structure of the blood purification apparatus. It is a perspective view which shows the schematic structure of the heating device. It is a top view of the heating device shown in FIG. It is sectional drawing of the heating device along the IV-IV line shown in FIG. It is a perspective view which houses the liquid bag which connected with the infusion pipe in a housing. It is sectional drawing which shows the heating device which accommodated the liquid bag. It is a reference cross-sectional view which shows the state in which the liquid bag is housed in the housing of the heating device which does not have a guide rail. It is a perspective view which shows the pressing plate which moves along a guide rail. It is sectional drawing which shows the schematic structure of the heating device of Embodiment 2.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following drawings, the same or corresponding parts are given the same reference numbers, and the description thereof will not be repeated.

(Embodiment 1)
First, a blood purification device provided with a heating device to which the idea of the present invention can be applied will be described.

FIG. 1 is a circuit diagram showing a configuration of a blood purification device. As shown in FIG. 1, the blood purification device 100 includes a blood purifier 120, a drainage pipe line 130, a dialysate pipe line 142, a replacement liquid pipe line 152, a first pump 160, and a second pump 161. , A third pump 162, a first valve 179, a first evacuation pipe 134, and a scale 139 are provided.

The blood purifier 120 contains, for example, a semipermeable membrane made of a hollow fiber membrane. The blood purifier 120 has a blood inlet 121 and a blood outlet 122. An upstream blood duct 110 is connected to the blood inlet 121. A downstream blood duct 116 is connected to the blood outlet 122.

A blood pump 111 that pumps blood is provided in the upstream blood duct 110. An arterial drip chamber 112 is provided in the middle of the upstream blood vessel 110. The arterial drip chamber 112 is provided with an upstream pressure measuring device 113 for measuring blood pressure. The blood collected from the patient's artery flows into the blood purifier 120 from the blood inlet 121 after the pressure is measured as it passes through the arterial drip chamber 112 on the way through the upstream blood line 110.

A venous drip chamber 114 is provided in the middle of the downstream blood vessel 116. The venous drip chamber 114 is provided with a downstream pressure measuring device 115 for measuring blood pressure. The blood purified by the blood purifier 120 is returned to the patient's vein after the pressure is measured as it passes through the venous drip chamber 114 on the way through the downstream blood duct 116. As described above, the blood purifier 120 is incorporated in the blood circuit. The venous drip chamber 114 is connected to the replacement fluid line 152. The replacement fluid line 152 may be connected to the arterial drip chamber 112 instead of the venous drip chamber 114.

The blood purifier 120 further includes a dialysate inlet 124 and a drainage outlet 123. A dialysate conduit 142 is connected to the dialysate inlet 124. A drainage pipe line 130 is connected to the drainage outlet 123.

The upstream end of the dialysate conduit 142 is connected to the dialysate supply unit 140 that supplies the dialysate 141. A first pump 160 that delivers the dialysate 141 at a set flow rate Qd is connected to the dialysate pipeline 142.

The first pump 160 is a roller type pump and includes a rotor connected to a motor and three rollers attached to the rotor. The tube constituting the dialysate line 142 is wound around the rotor of the first pump 160. As the rotor rotates, the roller closes the tube and sends out the dialysate 141 in the tube as the rotor rotates. The dialysate 141 that has flowed through the dialysate line 142 is supplied into the blood purifier 120. Thus, the dialysate line 142 is incorporated into the blood circuit.

The upstream end of the replacement fluid line 152 is connected to the replacement fluid supply unit 150 that supplies the replacement fluid 151. A second pump 161 that delivers the replacement fluid 151 at a set flow rate Qs is connected to the replacement fluid line 152.

The second pump 161 is a roller type pump and includes a rotor connected to a motor and three rollers attached to the rotor. The tube constituting the replacement fluid line 152 is wound around the rotor of the second pump 161. As the rotor rotates, the roller presses and closes the tube and sends out the replacement fluid 151 in the tube as the rotor rotates.

The replacement fluid 151 flowing through the replacement fluid line 152 is supplied into the venous drip chamber 114. That is, the replacement fluid line 152 supplies the replacement fluid 151 to the downstream side of the blood circuit from the blood purifier 120. When the replacement fluid line 152 is connected to the arterial side drip chamber 112, the replacement fluid line 152 supplies the replacement fluid 151 to the upstream side of the blood circuit from the blood purifier 120. As described above, the replacement fluid line 152 is incorporated in the blood circuit.

The drainage pipe line 130 includes a first branch line 131, a second branch line 132, and a third branch line 133 that divide and flow the drainage 138 discharged from the blood purifier 120 into three parts. As described above, the drainage pipe line 130 is incorporated in the blood circuit.

A first pump 160 that sends out the drainage 138 at a set flow rate Qd is connected to the first branch path 131. That is, the first pump 160 sends out the drainage 138 flowing through the first branch passage 131 and the dialysate 141 flowing through the dialysate pipe line 142 at equal flow rates.

The tube constituting the first branch path 131 is wound around the rotor of the first pump 160. As the rotor rotates, the roller closes the tube and sends out the drainage 138 in the tube as the rotor rotates. The drainage 138 flowing through the first branch path 131 is discharged into the drainage container 137.

A second pump 161 that sends out the drainage 138 at a set flow rate Qs is connected to the second branch path 132. That is, the second pump 161 sends out the drainage 138 flowing through the second branch path 132 and the replacement fluid 151 flowing through the replacement fluid line 152 at equal flow rates.

The tube constituting the second branch path 132 is wound around the rotor of the second pump 161. As the rotor rotates, the roller closes the tube and sends out the drainage 138 in the tube as the rotor rotates. The drainage 138 flowing through the second branch path 132 is discharged into the drainage container 137.

A third pump 162 that sends out the drainage 138 flowing through the third branch path 133 at a set flow rate Qu is connected to the third branch path 133. The third pump 162 is a roller type pump. A first valve 179 for opening and closing the third branch path 133 is provided on the downstream side of the third pump 162 in the third branch path 133. A first evacuation pipe 134 through which drainage 138 temporarily flows is connected to a third branch path 133 between the third pump 162 and the first valve 179.

The blood purification device 100 further includes a first liquid storage unit 135 that temporarily stores the drainage 138. The first liquid storage unit 135 is provided in the first evacuation pipe 134. The first liquid storage unit 135 may be formed of a container, or may be formed by partially expanding the diameter of the first evacuation pipe 134.

A first air supply pipe 136 is connected to the upper part of the first liquid storage unit 135. The first air supply pipe 136 is connected to the air pipe 172 in the dialysis machine 170 through the first air filter 175. The end of the air pipe 172 is open. A first air valve 173 for opening and closing the air pipe 172 is provided on the terminal side of the air pipe 172. In the air pipe 172, a pressure gauge 174 for measuring the pressure in the air pipe 172 and an air pump 171 are connected between the first air filter 175 and the first air valve 173.

The scale 139 measures the weight of the drainage 138 discharged from the drainage pipe 130. That is, the weight of the drainage 138 is measured after being discharged into the drainage container 137.

The heating device of the present invention is applied to the replacement fluid supply unit 150.
FIG. 2 is a perspective view showing a schematic configuration of the heating device 1. FIG. 3 is a plan view of the heating device 1 shown in FIG. FIG. 4 is a cross-sectional view of the heating device 1 along the line IV-IV shown in FIG. As shown in FIGS. 2 to 4, the heating device 1 showing the embodiment of the present invention includes a housing 2 and a heater 3.

As shown in FIG. 2, the housing 2 has a hollow substantially rectangular box shape. The housing 2 includes a bottom portion 4 and a side wall portion 5 extending upward from the bottom portion 4. The side wall portion 5 is arranged perpendicular to the bottom portion 4. The bottom portion 4 constitutes the bottom surface of the housing 2. The bottom portion 4 has a rectangular flat plate-shaped outer shape. A through hole 6 that penetrates the bottom portion 4 in the thickness direction is formed in the bottom portion 4. The through hole 6 communicates the internal space of the housing 2 with the outside. Further, a first slit 7 connected to the through hole 6 is formed in the bottom portion 4. The first slit 7 extends from the through hole 6 to one of the short sides of the rectangular bottom 4 in parallel with the long side of the rectangular bottom 4. The width of the first slit 7 is smaller than the diameter of the through hole 6. The width of the first slit 7 may be equal to or less than the radius of the through hole 6.

The side wall portion 5 has a left side wall portion 5a, a front side wall portion 5b, a right side wall portion 5c, and a rear side wall portion 5d. The left side wall portion 5a, the front side wall portion 5b, the right side wall portion 5c, and the rear side wall portion 5d each have a rectangular flat plate-shaped outer shape. The left side wall portion 5a and the right side wall portion 5c are vertically connected to the long side of the rectangular bottom portion 4. The left side wall portion 5a and the right side wall portion 5c are arranged in parallel with a gap. The front side wall portion 5b and the rear side wall portion 5d are vertically connected to the short side of the rectangular bottom portion 4. The front side wall portion 5b and the rear side wall portion 5d are arranged in parallel with a gap.

The left side wall portion 5a is connected to one of the long sides of the rectangular front side wall portion 5b. The right side wall portion 5c is connected to the other side of the long side of the rectangular front side wall portion 5b. The left side wall portion 5a is connected to one of the long sides of the rectangular rear side wall portion 5d. The right side wall portion 5c is connected to the other side of the long side of the rectangular rear side wall portion 5d.

The left side wall portion 5a, the front side wall portion 5b, the right side wall portion 5c, and the rear side wall portion 5d are formed in a rectangular tubular shape. The side wall portion 5 has a side wall portion upper end 9 forming the upper end of the rectangular cylinder and a side wall portion lower end 10 forming the lower end of the rectangular cylinder. The bottom portion 4 is connected to the lower end 10 of the side wall portion to form a hollow housing 2. The internal space of the housing 2 is surrounded by a side wall portion 5 and a bottom portion 4.

A second slit 8 is formed in the front side wall portion 5b. The second slit 8 extends parallel to the long side of the vertically long rectangular front side wall portion 5b. The second slit 8 is formed from the lower end 10 of the side wall portion to the upper end 9 of the side wall portion in the front side wall portion 5b. The second slit 8 is connected to the first slit 7 at the lower end 10 of the side wall portion. The first slit 7 extends from the through hole 6 to the front side wall portion 5b.

Of the side wall portions 5, the front side wall portion 5b constitutes a slit forming portion in which the second slit 8 is formed. Of the side wall portions 5, the left side wall portion 5a, the right side wall portion 5c, and the rear side wall portion 5d are not formed with slits. The left side wall portion 5a, the right side wall portion 5c, and the rear side wall portion 5d do not form a slit forming portion.

The upper part of the housing 2 is open, and the inside of the housing 2 is open to the outside. As shown in FIG. 2, the housing 2 is configured so that the inside can be seen when viewed from above.

The heater 3 has a rectangular flat plate shape and is arranged in the housing 2. The heater 3 is attached to the entire surface of the left wall portion 5a. The heater 3 heats the inside of the housing 2. The heater 3 is, for example, an electric heater.

The heating device 1 further includes a pressing plate 11, a guide rail 12, an urging portion 13, a pressing plate fixing portion 14a, and a hook 15.

The pressing plate 11 has a rectangular flat plate shape, and is arranged in the housing 2 in parallel with the right side wall portion 5c. The pressing plate 11 has a pressing plate front surface 11a and a pressing plate back surface 11b. The pressing plate 11 reciprocates in the housing 2. It is desirable that both ends of the pressing plate 11 in the long side direction of the rectangular bottom portion 4 are configured so as not to come into contact with the front side wall portion 5b and the rear side wall portion 5d, respectively. This is because when the pressing plate 11 comes into contact with the front side wall portion 5b and the rear side wall portion 5d, the pressing plate 11 becomes difficult to move.

Two guide rails 12 are arranged in the housing 2. The guide rail 12 has a rectangular rod-like shape extending in the short side direction of the rectangular bottom portion 4. The guide rails 12 are attached to the rear side wall portion 5d at regular intervals. The guide rail 12 extends perpendicularly to the left side wall portion 5a. The guide rail 12 extends parallel to the short side of the rectangular bottom portion 4. The longitudinal end of the guide rail 12 is in contact with the surface of the heater 3 and the surface of the right wall 5c. As a result, even if the pressing plate 11 moves to the end of the guide rail 12, it does not come off from the guide rail 12. A stopper may be provided in the middle of the guide rail 12 to restrict the movement of the pressing plate 11.

The urging portion 13 is attached between the pressing plate 11 and the right side wall portion 5c. The urging portion 13 is, for example, a spring. The urging portion 13 is, for example, a coil spring. The urging portions 13 are attached to the upper two places of the pressing plate back surface 11b and the lower two places at regular intervals. The urging portion 13 urges the pressing plate 11 in a direction away from the right side wall portion 5c and approaching the left side wall portion 5a.

As shown in FIG. 3, two pressing plate fixing portions 14a are arranged side by side in the long side direction of the rectangular bottom portion 4. The pressing plate fixing portion 14a is arranged closer to the right side wall portion 5c with respect to the center of the bottom portion 4 in the short side direction of the rectangular bottom portion 4 in FIG. The alternate long and short dash line in FIG. 3 indicates the center line C that bisects the short side direction of the rectangular bottom portion 4. As shown in FIG. 4, the pressing plate fixing portion 14a projects upward from the bottom portion 4. A relief hole 14b capable of accommodating the pressing plate fixing portion 14a is formed in the bottom portion 4. The pressing plate fixing portion 14a comes into contact with the lower portion of the pressing plate surface 11a and hinders the movement of the pressing plate 11 in the direction approaching the left wall portion 5a.

The hook 15 has a J-shape in which one end of a straight line is curved. The hook 15 is mounted inside the housing 2. The hook 15 is attached to the upper part of the heater 3.

FIG. 5 is a perspective view of accommodating the liquid bag 17 to which the infusion pipe 16 is connected in the housing 2. The infusion pipe 16 constitutes a part of the fluid replacement pipe line 152 in FIG. A replacement fluid is stored inside the liquid bag 17. The replacement fluid is an example of the liquid stored inside the liquid bag 17. A hook hole 19 is formed in the upper part of the liquid bag 17. The liquid bag 17 has a liquid outflow portion 18 through which the liquid flows out. A liquid outflow portion 18 is provided at the lower part of the liquid bag 17. An infusion pipe 16 is connected to the liquid outflow portion 18. The infusion pipe 16 connected to the liquid bag 17 can pass through the second slit 8 formed in the front side wall portion 5b, the first slit 7 formed in the bottom portion 4, and the through hole 6 in this order.

FIG. 6 is a cross-sectional view showing a heating device 1 containing the liquid bag 17. The cross section of the housing 2 shown in FIG. 6 is a cross section along the VI-VI line shown in FIG. The liquid bag 17 housed in the housing 2 is arranged so as to extend along the left side wall portion 5a. The liquid outflow portion 18 penetrates the through hole 6 and is arranged over the internal space and the outside of the housing 2. The hook hole 19 is hung on the hook 15. The liquid bag 17 is suspended from the hook 15. As a result, the liquid bag 17 is supported by the hook 15.

The pressing plate fixing portion 14a is housed in the escape hole 14b. The pressing plate 11 urged by the urging portion 13 can move in the direction approaching the left wall portion 5a without being hindered by the pressing plate fixing portion 14a.

The pressing plate 11 moves along the guide rail 12 in a direction approaching the left side wall portion 5a. The pressing plate 11 presses the liquid bag 17 against the heater 3 and sandwiches the liquid bag 17 together with the heater 3. The heater 3 pressed against the liquid bag 17 heats the replacement fluid inside the liquid bag 17.

The temperature sensor 20 is attached to the lower part of the heater 3. The temperature sensor 20 detects the temperature of the liquid bag 17. The emergency stop function of the heater may be set based on the detection result of the temperature sensor 20.

The configuration and the action and effect of the heating device 1 according to the embodiment will be summarized as follows. A reference number is added to the configuration of the embodiment, which is an example.

As shown in FIG. 6, the heating device 1 of the present embodiment is a device for heating the liquid bag 17, and includes a housing 2 and a heater 3. The housing 2 includes a bottom portion 4 and a side wall portion 5 extending upward from the bottom portion 4. A through hole 6 through which the liquid outflow portion 18 penetrates is formed in the bottom portion 4. The liquid bag 17 is housed in the housing 2 so as to extend along the left wall portion 5a. The heater 3 heats the inside of the housing 2. As a result, the liquid bag 17 can be heated in a state of being arranged so as to extend along the left side wall portion 5a of the housing 2, and therefore, as compared with the conventional heating device in which the liquid bag is installed sideways, The installation space of the heating device can be reduced.

As shown in FIG. 5, a first slit 7 connected to the through hole 6 is formed in the bottom portion 4 of the housing 2. The side wall portion 5 has a front side wall portion 5b. The front side wall portion 5b is formed with a second slit 8 that is connected to the first slit 7 and extends from the lower end portion 10 of the side wall portion to the upper end 9 of the side wall portion. As shown in FIG. 5, an infusion pipe 16 is connected to the liquid outflow portion 18 of the liquid bag 17. The infusion pipe 16 connected to the liquid bag 17 can pass through the second slit 8 formed in the front side wall portion 5b, the first slit 7 formed in the bottom portion 4, and the through hole 6 in this order. As a result, the liquid bag 17 can be easily housed in the housing 2 in a state where the infusion pipe 16 is connected to the liquid bag 17, and the man-hours for work on site can be reduced.

As shown in FIG. 6, the heating device 1 further includes a pressing plate 11. The pressing plate 11 reciprocates in the housing 2. The pressing plate 11 sandwiches the liquid bag 17 together with the left side wall portion 5a. The liquid bag 17 is sandwiched between the left side wall portion 5a and the pressing plate 11, and the contact area between the heater 3 and the liquid bag 17 becomes large. As a result, the replacement fluid in the liquid bag 17 can be efficiently heated. The pressing plate 11 may be configured as a heater in place of or in addition to the heater 3. By providing the heater 3 on the left side wall portion 5a and configuring the pressing plate 11 as a heater, the replacement fluid in the liquid bag 17 can be further efficiently heated.

The heating device 1 further includes an urging unit 13. The urging portion 13 urges the pressing plate 11 together with the pressing plate 11 toward the left side wall portion 5a sandwiching the liquid bag 17. As a result, the liquid bag 17 can be sandwiched between the pressing plate 11 and the left side wall portion 5a, and the liquid bag 17 can be reliably brought into contact with the heater 3 to efficiently heat the liquid bag 17.

As shown in FIG. 2, the heating device 1 further includes a guide rail 12 extending perpendicularly to the left side wall portion 5a. Two guide rails 12 are attached side by side to the rear side wall portion 5d.

FIG. 7 is a reference cross-sectional view showing a state in which the liquid bag 17 is housed in the housing 2 of the heating device 1 not provided with the guide rail 12. As shown in FIG. 7, the replacement fluid in the liquid bag 17 moves downward in the bag due to the action of gravity, and the lower portion of the liquid bag 17 has a bulging shape. The lower portion of the pressing plate 11 that tends to move in the direction approaching the left side wall portion 5a is hindered by the replacement fluid in the liquid bag 17, and the pressing plate 11 tilts obliquely with respect to the bottom portion 4. As a result, the amount of heat transferred from the heater 3 to the replacement fluid in the liquid bag 17 is reduced, so that the heating efficiency is lowered.

On the other hand, by providing the heating device 1 with the guide rail 12, the pressing plate 11 can move in parallel along the guide rail 12. FIG. 8 is a perspective view showing a pressing plate 11 moving along the guide rail 12. By providing the guide rail 12 in the heating device 1, the pressing plate 11 is not hindered by the replacement fluid in the liquid bag 17 and is not tilted obliquely with respect to the bottom 4. The pressing plate 11 can sandwich the liquid bag 17 together with the left wall portion 5a in a state where the left wall portion 5a and the pressing plate 11 are parallel to each other. As a result, the amount of heat transferred from the heater 3 to the replacement fluid in the liquid bag 17 is increased, so that the heating efficiency can be increased.

As shown in FIG. 4, the heating device 1 further includes a pressing plate fixing portion 14a. The pressing plate fixing portion 14a comes into contact with the lower portion of the pressing plate surface 11a of the pressing plate 11 and hinders the movement of the pressing plate 11 in the direction approaching the left wall portion 5a. As a result, a space for accommodating the liquid bag 17 is secured between the left side wall portion 5a and the pressing plate 11. Therefore, the liquid bag 17 can be easily housed in the housing 2. As shown in FIG. 6, after the liquid bag 17 is housed in the housing 2, the pressing plate fixing portion 14a is housed in the escape hole 14b. As a result, the pressing plate 11 urged by the urging portion 13 can move in the direction approaching the left wall portion 5a without being hindered by the pressing plate fixing portion 14a. The pressing plate fixing portion 14a may have a structure in which the liquid bag 17 is housed in the housing 2 by a sensor, and the liquid bag 17 is housed in the escape hole 14b based on the detection result of the sensor.

The heating device 1 further includes a hook 15 for suspending the liquid bag 17 in the housing 2. The liquid bag 17 is formed with a hook hole 19. The hook hole 19 is hung on the hook 15. The liquid bag 17 is suspended from the hook 15. As a result, the liquid bag 17 is supported by the hook 15. Therefore, even if the liquid bag 17 is sandwiched between the left side wall portion 5a and the pressing plate 11, the shape in which the liquid bag 17 extends along the left side wall portion 5a can be maintained.

(Embodiment 2)
FIG. 9 is a cross-sectional view showing a schematic configuration of the heating device 1 of the second embodiment. In the heating device 1 of the first embodiment, the urging portion 13 is attached between the pressing plate 11 and the right side wall portion 5c, but the present invention is not limited to this configuration. In the heating device 1 of the second embodiment, the actuator 21 is attached between the pressing plate 11 and the right side wall portion 5c instead of the urging portion 13. The actuators 21 are arranged side by side on the upper part and the lower part of the rectangular pressing plate 11. The pressing plate 11 is moved by the actuator 21 in a direction approaching the left wall portion 5a. The pressing plate 11 presses the liquid bag 17 against the left side wall portion 5a and sandwiches the liquid bag 17 together with the left side wall portion 5a. As a result, the liquid bag 17 can be sandwiched between the pressing plate 11 and the left side wall portion 5a, and the liquid bag 17 can be surely brought into contact with the heater 3 to efficiently heat the liquid bag 17.

In the heating device 1 of the second embodiment, the pressing plate 11 can be translated by the actuator 21 even if it is not guided by the guide rail 12. Further, the position of the pressing plate 11 can be arbitrarily adjusted. Therefore, the heating device 1 of the second embodiment does not have to include the pressing plate fixing portion 14a, the escape hole 14b, and the guide rail 12.

In the description so far, the upper part of the housing 2 is open, and the inside of the housing 2 is always open to the outside, but the present invention is not limited to this example. For example, a lid that can be opened and closed may be provided on the upper part of the housing 2. By opening the lid before accommodating the liquid bag 17 and closing the lid after accommodating the liquid bag 17, it is possible to efficiently heat the liquid bag 17.

The shape of the housing 2 is not limited to the rectangular box shape. The side wall portion 5 does not have to be perpendicular to the bottom portion 4 and may be inclined.

The second slit 8 may be formed in a side wall portion 5 other than the front side wall portion 5b.
The liquid in the liquid bag 17 may be dialysate, blood or enteral nutritional supplement instead of replacement fluid.

Although the embodiments of the present invention have been described above, it should be considered that the embodiments disclosed this time are examples in all respects and are not restrictive. The scope of the present invention is shown by the scope of claims rather than the above description, and is intended to include the meaning equivalent to the scope of claims and all modifications within the scope.

1 heating device, 2 housing, 3 heater, 4 bottom, 5 side wall, 5a left side wall, 5b front side wall, 5c right side wall, 5d rear side wall, 6 through hole, 7 first slit, 8th 2 slits, 9 upper end of side wall, 10 lower end of side wall, 11 pressing plate, 11a pressing plate surface, 11b pressing plate back surface, 12 guide rail, 13 urging part, 14a pressing plate fixing part, 14b escape hole, 15 hook, 16 Infusion pipe, 17 liquid bag, 18 liquid outflow part, 19 hook hole, 20 temperature sensor, 21 actuator, 100 blood purification device, 150 fluid replacement unit, 151 fluid replacement, 152 fluid replacement pipeline.

Claims (9)

A heating device that heats a liquid bag having a liquid outflow portion that stores a liquid inside and outflows the liquid.
The housing includes a housing for accommodating the liquid bag, the housing includes a bottom portion and a side wall portion extending upward from the bottom portion, and the bottom portion has a through hole through which the liquid outflow portion penetrates and a first through hole connected to the through hole. A slit is formed, the side wall portion has a slit forming portion, and the slit forming portion is formed with a second slit which is connected to the first slit and extends to the upper end of the side wall portion, and is housed in the housing. The liquid bag is arranged so as to extend along the side wall portion.
Further, a heating device including a heater for heating the inside of the housing. The heating device according to claim 1, further comprising a pressing plate that reciprocates in the housing and sandwiches the liquid bag together with the side wall portion. The heating device according to claim 2 , wherein the heater is provided on the pressing plate. The heating device according to claim 2 or 3 , wherein the heater is provided on the side wall portion. The heating device according to any one of claims 2 to 4 , further comprising an urging portion for urging the pressing plate toward the side wall portion sandwiching the liquid bag together with the pressing plate. The heating device according to any one of claims 2 to 4 , further comprising an actuator for moving the pressing plate toward the side wall portion sandwiching the liquid bag together with the pressing plate. The heating device according to any one of claims 2 to 6 , further comprising a guide rail extending perpendicularly to the side wall portion sandwiching the liquid bag together with the pressing plate. The heating device according to any one of claims 2 to 7 , further comprising a pressing plate fixing portion that restricts the movement of the pressing plate. The heating device according to any one of claims 1 to 8 , further comprising a hook for suspending the liquid bag inside the housing.

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