CN219494582U - Device for forming shallow low temperature and device for shallow low temperature experiment - Google Patents

Abstract

The utility model provides a device for forming shallow low temperature and a device for shallow low temperature experiments, wherein the device for forming shallow low temperature comprises a first chamber, a second chamber and a cooling device, the second chamber is insulated from the first chamber, the temperature of the first chamber is lower than that of the second chamber, the cooling device cools the second chamber, the temperature of the cooling device is increased and screwed into the first chamber, and the first chamber cools the cooling device. The cooling device can rotate between the first chamber and the second chamber, can be screwed into the first chamber to cool after the second chamber is cooled and heated by the cooling device, is screwed into the second chamber after cooling, can realize the circulating cooling of the second chamber and the cooling device, and can be reused.

Description

Device for forming shallow low temperature and device for shallow low temperature experiment

Technical Field

The utility model relates to the technical field of medical equipment, in particular to a device for forming shallow low temperature and a device for shallow low temperature experiments.

Background

In the technical field of shallow low-temperature treatment, before the shallow low-temperature treatment, a clinical test is required to be performed by adopting a white rat and the like, after the temperature of the room is reduced by adding ice in an ice room in the prior art, the ice is changed into water to be discharged, a large amount of ice is required to be consumed in the clinical test of long time or/and low temperature, and the ice cannot be recycled.

In the prior art, in order to verify the treatment effect of the shallow low temperature, clinical tests are required to be carried out on the shallow low temperature and the normal temperature and even the temperature higher than the normal temperature, clinical tests are carried out on the shallow low temperature by adopting an ice chamber, clinical tests are carried out on the normal temperature and even the temperature higher than the normal temperature by adopting infrared irradiation, the influence of the irradiation cannot be abandoned, and the temperature is uneven.

Disclosure of Invention

In view of one or more of the problems in the prior art, the utility model provides a device for forming shallow low temperature, which comprises a first chamber, a second chamber and a cooling device, wherein the second chamber is insulated from the first chamber, the temperature of the first chamber is lower than that of the second chamber, the cooling device cools the second chamber, the temperature of the cooling device is increased and screwed into the first chamber, and the first chamber cools the cooling device.

According to one aspect of the utility model, the cooling device further comprises a position sensor, a door is arranged on the second chamber, the position sensor is used for sensing the relative position of the cooling device and the door, the cooling device reaches the set relative position of the door, the door is opened, and the cooling device is screwed into the second chamber through the door.

According to one aspect of the utility model, the cooling device further comprises a rotating shaft, wherein the rotating shaft is arranged in the first chamber, and the cooling device is rotatably connected to the rotating shaft.

According to one aspect of the utility model, the cooling device is provided in a plurality of parts, which are screwed into and out of the second chamber in turn.

According to one aspect of the utility model, the cooling device includes an ice bin containing a cooling medium.

According to one aspect of the utility model, the cooling device further comprises a suction fan, a suction inlet of the suction fan is positioned outside the cooling device, and an air outlet of the suction fan is positioned in the cooling device and blows air towards the ice box.

According to one aspect of the utility model, the cooling device further comprises a third chamber, the second chamber surrounds the third chamber, and a cooling channel is arranged between the second chamber and the third chamber.

According to an aspect of the present utility model, a plurality of through holes for communicating the second chamber with the third chamber are further included.

According to one aspect of the utility model, the first chamber is disposed on one or more sides of the second chamber.

According to a second aspect of the present utility model, there is provided an apparatus for shallow cryogenic experiments, comprising an ice chamber, a heat exchanger and a heating chamber, the ice chamber having a cooling passage, the heating chamber having a warming passage, the heat exchanger comprising a refrigerant passage and a heat medium passage, the cooling passage passing through the refrigerant passage of the heat exchanger, the warming passage passing through the heat medium passage of the heat exchanger, the cooling passage cooling a refrigerant passing through the heat exchanger after the cooling temperature of the ice chamber is raised, the temperature of the heating chamber is lowered after the heating chamber is raised, and the temperature is raised by the heating passage through the heat medium in the heat exchanger;

preferably, the ice chamber comprises a second chamber, a third chamber and a cooling device, the second chamber surrounds the third chamber, a cooling channel is arranged between the second chamber and the third chamber, and the cooling device is arranged in the cooling channel; the heating chamber comprises a fourth chamber, a fifth chamber and a heater, wherein the fourth chamber is insulated from the second chamber, the fourth chamber surrounds the fifth chamber, and a heating channel is arranged between the fourth chamber and the fifth chamber.

The cooling device for forming the shallow low-temperature device can rotate between the first chamber and the second chamber, can be screwed into the first chamber to cool after the second chamber is cooled and heated by the cooling device, is screwed into the second chamber again after cooling, can realize the circulating cooling of the second chamber and the cooling device, and can be reused.

The device that forms shallow cryogenic temperature can include a plurality of heat sink part (one or more) heat sinks and be located the second room, and another part (one or more) heat sinks are located first room, and a part heat sinks screw in first room of screw in after the second room cooling settlement time and cool down simultaneously one or more screw in second room in another part heat sinks and cool down the second room, when can guarantee the temperature of second room to invariable temperature, heat sinks can cyclic utilization.

According to the device for shallow low-temperature experiments, the temperature of the heating chamber can be increased while the temperature of the ice chamber is reduced through the heat exchanger, clinical experiments at different temperatures can be simultaneously carried out, and the influence of illumination is abandoned, so that the temperature is increased uniformly.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:

FIG. 1 is a schematic view of one embodiment of an apparatus for forming shallow cryogenic temperatures according to the present utility model;

FIG. 2 is a schematic view of a second embodiment of the apparatus for forming shallow low temperature according to the present utility model;

FIG. 3 is a schematic view of a third embodiment of the apparatus for forming shallow low temperature according to the present utility model;

FIG. 4 is a schematic view of one embodiment of an apparatus for shallow cryogenic experiments according to the present utility model;

FIG. 5 is a schematic view of a second embodiment of the apparatus for shallow cryogenic experiments of the present utility model;

in the figure:

1-a first chamber, 2-a second chamber, 2-4-a cooling channel; 3-cooling device, 31-ice box, 32-suction fan, 33-rotation axis, 4-third room, 5-heat exchanger, 6-fourth room, 6-7-heating channel, 7-fifth room, 8-heater.

Detailed Description

Hereinafter, only certain exemplary embodiments are briefly described. As will be recognized by those of skill in the pertinent art, the described embodiments may be modified in various different ways without departing from the spirit or scope of the present utility model. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive.

The following disclosure provides many different embodiments, or examples, for implementing different features of the utility model. They are, of course, merely examples and are not intended to limit the utility model.

The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present utility model only, and are not intended to limit the present utility model.

Fig. 1 is a physical diagram of an embodiment of the device for forming shallow low temperature according to the present utility model, as shown in fig. 1, the device for forming shallow low temperature includes a first chamber 1, a second chamber 2 and a cooling device 3, the second chamber 2 is insulated from the first chamber 1, the temperature of the first chamber 1 is lower than that of the second chamber 2, the cooling device 3 cools the second chamber 2, the temperature of the cooling device 3 is increased and screwed into the first chamber 1, the first chamber 1 cools the cooling device 3, and the cooling device 3 rotates in the second chamber 2 and the first chamber 1 to realize cyclic cooling of the second chamber 2 and the cooling device 3.

When a shallow cryogenic clinical trial is performed, an animal (e.g., a rat) may be placed in the second chamber 2, and the cooling device 3 may be recycled while the second chamber 2 is maintained at a constant temperature (e.g., 33±5 ℃) by circulating cooling of the second chamber 2 and the cooling device 3. When the treatment is performed at a low temperature, the bed can be arranged in the second chamber, and the patient can lie on the bed to perform the treatment at a constant temperature at a low temperature in the second chamber.

In one embodiment, as shown in fig. 1, the cooling device further includes a rotating shaft 33, the rotating shaft 33 is disposed in the first chamber 1, the cooling device 3 is rotatably connected to the rotating shaft 33, the rotating shaft 33 may be driven by a motor to rotate, in addition, the rotating shaft 33 may further include a transverse shaft connected to the first chamber 1 and a longitudinal shaft connected to the cooling device 3, the transverse shaft may be fixed to rotate, and the longitudinal shaft may also be fixed to rotate, and the cooling device 3 may be screwed into the second chamber 2 after cooling for a first set time, so that the cooling device 3 may be recycled.

In one embodiment, the cooling devices 3 are multiple and screwed into and out of the second chamber 2 in turn, that is, a part (one or more) of the cooling devices 3 are located in the second chamber 2, another part (one or more) of the cooling devices 3 are located in the first chamber 1, after the cooling device 3 cools the second chamber 2 for a set time, the cooling device 3 is screwed into the first chamber 1 to cool the second chamber 2, and one or more of the cooling devices 3 is screwed into the second chamber 2 to cool the second chamber 2, so that the cooling device 3 can be recycled while ensuring constant temperature cooling of the second chamber 2.

In one embodiment, the cooling device 3 includes an ice bin 31, where the ice bin 31 contains a cooling medium, and the cooling medium may be ice cubes or a refrigerant.

Preferably, the cooling device 3 may further include a weight sensor (not shown) provided on the ice bin for sensing a change in weight of the ice bin, and the ice bin is screwed into the first chamber for cooling when the weight of the ice bin becomes smaller to a set threshold value.

In one embodiment, the cooling device 3 further includes a suction fan 32, an air suction inlet of the suction fan 32 is located outside the cooling device 3, and an air outlet of the suction fan 32 is located inside the cooling device 3 and blows air toward the ice bin 31.

In one embodiment, the device for forming a shallow low temperature further comprises a position sensor (not shown) provided on the second chamber 2 for sensing the relative position of the cooling device 3 to the door, the cooling device 3 reaching a set relative position of the door, the door being opened, the cooling device 3 being screwed into the second chamber 2 through the door, for example, the position sensor being a proximity sensor provided on the door, the door being opened when the cooling device 3 reaches a position where it can pass through the door.

In the above embodiments, the first chamber 1 is provided on one or more sides of the second chamber 2.

In the above embodiments, the apparatus for forming a shallow low temperature may further include a controller (not shown) that may control the rotation of the cooling device 3 according to a time setting, and may further control the opening and closing of the second chamber door according to a rotation time of the cooling device 3, so that the cooling device 3 is pre-introduced into the second chamber, the door is opened, and the door is closed after the introduction into the second chamber.

Preferably, the controller is also connected with the position sensor in a wired or wireless manner and is used for receiving signals of the position sensor and controlling the opening and closing of the second chamber door.

Preferably, the controller may also be connected to the weight sensor by wire or wirelessly, for receiving the signal from the weight sensor and controlling the rotation of the cooling device 3.

In the above embodiments, the first chamber may have the same structure as the refrigerator in the related art.

Fig. 2 is a schematic diagram of a second embodiment of the device for forming a shallow low temperature according to the present utility model, as shown in fig. 2, the device for forming a shallow low temperature includes a first chamber 1, a cooling device 3, a second chamber 2 and a third chamber 4, the second chamber 2 surrounds the third chamber 4, a cooling channel 2-4 is disposed between the second chamber 2 and the third chamber 4, the cooling device 3 is screwed into the cooling channel 2-4, and the cooling channel 2-4 cools the third chamber 4, which is beneficial to uniformity of cooling.

In one embodiment, a plurality of through holes are further included for communicating the second chamber 2 with the third chamber 4.

In one embodiment, as shown in fig. 2, the first chamber 1 is disposed above the second chamber 2, the top surface of the third chamber 4 is provided with a plurality of through holes 41, the cooling device 3 includes an ice box 31 and a suction fan 32, when the cooling device 3 is located in the cooling channels 2-4 of the second chamber 2 and the third chamber 4, the suction inlet of the suction fan 32 is located in the cooling channels 2-4, the air outlet of the suction fan 32 is located above the ice box 31, the suction fan 32 sucks cold air of the cooling channels 2-4, and after the ice box 31 is cooled further, the cold air enters the third chamber 4 through the through holes 41 to cool and cools the third chamber 4 through the cooling channels 2-4.

When the shallow low temperature clinical test is performed, animals (such as rats) can be placed in the third chamber 4, the ice box 31 cools not only the third chamber 4 but also the gas of the cooling channel 2-4, the cooling channel 2-4 cools the peripheral circulation, the cooling rate of the third chamber 4 is improved, and the uniformity for cooling is improved.

When the patient carries out the shallow low-temperature treatment room in the third room 4, the bed can be placed in the third room 4, and the patient is not directly cooled through the cooling device 3, so that the experience of the patient is improved.

Fig. 3 is a schematic view of a third embodiment of the apparatus for forming a shallow low temperature according to the present utility model, and as shown in fig. 3, the apparatus for forming a shallow low temperature includes a first chamber 1, a second chamber 2, a third chamber 4, and a cooling device 3, and the first chamber 1 is disposed at a side of the second chamber 2.

In one embodiment, the third chamber 4 is provided with a plurality of through holes towards the first chamber 1, and the plurality of through holes can be symmetrically arranged to form convection and accelerate circulation of cold air.

Preferably, the number of through holes on the side close to the bottom surface of the third chamber 4 is greater than that of other parts, and the amount of cold air entering the bottom is increased, so that animals or patients on the bottom surface can quickly reach a shallow low temperature.

In one embodiment, the cooling device 3 includes an ice box 31 and a suction fan 32, the ice box 31 and the suction fan 32 are located in a housing, the suction inlet of the suction fan 32 is located in the cooling channel 2-4, the air outlet of the air cooler faces the ice box 31, and the cooling channel 2-4 around the third chamber 4 can be formed by the air direction of the air outlet of the suction fan 32.

In one embodiment, the cooling device 3 includes a plurality of ice boxes 31 and a suction fan 32, the suction fan 32 is disposed above the ice boxes 31 on one side, and the air suction opening and the air outlet of the suction fan 32 are both located in the cooling channel 2-4, and the cooling channel 2-4 around the third chamber 4 can be formed by the air direction of the air outlet of the suction fan 32.

Fig. 4 is a schematic view of an embodiment of the apparatus for shallow low temperature experiments according to the present utility model, as shown in fig. 4, the apparatus for forming shallow low temperature includes an ice chamber having a temperature lowering channel 2-4, a heat exchanger 5 having a temperature raising channel 6-7, and a heating chamber having a refrigerant channel and a heat medium channel, the temperature lowering channel 2-4 passing through the refrigerant channel of the heat exchanger 5, the temperature raising channel 6-7 passing through the heat medium channel of the heat exchanger 5, the temperature lowering channel 2-4 lowering the temperature of the refrigerant passing through the heat exchanger 5 after the temperature lowering temperature of the ice chamber increases, the temperature raising channel 6-7 lowering the temperature after the temperature raising of the heating chamber, and raising the temperature by the heat medium in the heat exchanger 5.

FIG. 5 is a schematic diagram of a second embodiment of the utility model for shallow low temperature experiment, as shown in FIG. 5, the device for forming shallow low temperature comprises an ice chamber, a heat exchanger 5 and a heating chamber, the ice chamber comprises a second chamber 2, a third chamber 4 and a cooling device 3, the second chamber 2 surrounds the third chamber 4, a cooling channel 2-4 is arranged between the second chamber 2 and the third chamber 4, the cooling device 3 is arranged in the cooling channel 2-4, the cold air generated by the cooling device 3 is cooled down the third chamber 4, the temperature is raised into a refrigerant channel of the heat exchanger 5 to be cooled down, and then discharged to the cooling channel 2-4 again, the cooling channel 2-4 is cooled down the third chamber 4 and the cooling device, and the heat exchanger 5 is cooled down the cooling channel 2-4 and simultaneously cooled down the cooling device 3; the heating chamber comprises a fourth chamber 6, a fifth chamber 7 and a heater 8, wherein the fourth chamber 6 is insulated from the second chamber 2, the fourth chamber 6 surrounds the fifth chamber 7, a heating channel 6-7 is arranged between the fourth chamber 6 and the fifth chamber 7, after the temperature of the hot air generated by the heater 8 is raised to the fifth chamber 7, the hot air is reduced, after being heated, enters a heating medium channel of the heat exchanger 5, and is discharged to the heating channel 6-7 again, and the temperature of the fifth chamber 7 is raised by the heating channel 6-7.

In one embodiment, as shown in fig. 5, the cooling device 3 is disposed above the third chamber 4, the heating device is disposed below the fifth chamber 7 or/and the side surface of the fifth chamber 7 away from the exchanger, the cold air moves downward, the hot air moves upward, the cooling device 3 and the cooling channels 2-4 are circularly cooled while conforming to aerodynamic movement, the heating device and the heating channels 6-7 are circularly heated, the shallow low temperature effect can be quickly achieved by adopting lower cooling power, and the heating constant temperature can be quickly achieved by adopting lower heating power.

In the embodiments of the apparatus for shallow cryogenic experiments described above, the number of ice chambers may be one or more, and the number of heating chambers may be one or more.

In one embodiment of the present utility model, a shallow hypothermia clinical trial was performed using the shallow hypothermia-forming device of fig. 3 of the present utility model to investigate the effect of shallow hypothermia on myocardial ischemia-reperfusion (I/R) injury combined with sepsis, in particular:

5 healthy male SD rats are selected, the weight of the healthy male SD rats is 400-600 g, and all animals are purchased from Experimental animal technology limited company in Beijing Vetong. Rat clean diet was given before the experiment, and no abnormal reaction was observed for 7 d;

drawing out nylon wires after about 30min before ligation in the process of constructing a myocardial I/R injury model to recanalize blood vessels and establish an ischemia reperfusion injury model, drawing out nylon wires, simultaneously injecting 15mg/kg of endotoxin (LPS, O111B4, sigma company, U.S.) into a rat body to establish a sepsis model, reducing the basal left ventricular systolic pressure of the rat to about 60-70% of a basal value (about 60-80 mmHg) after about 15min and maintaining for more than 1h, taking the sample as a sampling sample of the myocardial I/R injury combined sepsis model, injecting LPS, simultaneously placing the rat into a device for forming shallow low temperature for cooling, detecting the anal temperature once every 5min, reducing the basal left ventricular systolic pressure of the rat to a target temperature (33.0+/-0.5) DEG C for 15min, and then maintaining for 2h; venous blood was withdrawn and the dead rats were heart-sampled; venous blood and heart data are collected to construct a shallow cryogenic data set.

By analyzing the shallow low temperature data set of the shallow low temperature clinical test, the shallow low temperature is obtained, and the shallow low temperature proves that the composition can improve the systolic and diastolic functions of cardiac muscle, reduce myocardial infarction area, lighten myocardial injury and also has the functions of resisting myocardial oxidative stress, apoptosis and inflammatory reaction.

In another embodiment of the present utility model, a comparative clinical trial of hypothermia, normothermia and sham surgery was performed using the apparatus for the hypothermia trial of the present utility model shown in fig. 5, specifically:

the device for shallow low-temperature experiments comprises an ice chamber and two heating chambers, wherein the two heating chambers are respectively positioned on two side surfaces of the ice chamber;

15 healthy male SD rats are selected, the weight of the healthy male SD rats is 400-600 g, and all animals are purchased from Experimental animal technology limited company in Beijing Vetong. The rats were cleaned before the experiment, observed for 7d, no abnormal reaction, and 15 rats were randomly divided into three groups;

the shallow low temperature set is the same as the previous embodiment;

the normothermic group is: drawing out nylon wires after the ligature is carried out for about 30min before the ligation in the process of constructing a myocardial I/R injury model to lead blood vessels to be recanalized and establish an ischemia reperfusion injury model, drawing out nylon wires, simultaneously injecting 15mg/kg of endotoxin (LPS, O111B4, sigma company, U.S.) into a rat body to establish a sepsis model, reducing the basal left ventricular systolic pressure of the rat to about 60-70% of the basal value (about 60-80 mmHg) after about 15min and maintaining for more than 1h, and injecting LPS while heating the rat in a heating chamber to maintain the anal temperature of the rat injected with LPS at (37.0+/-0.5) ℃ for 2h; venous blood was withdrawn and the dead rats were heart-sampled; collecting venous blood and heart data to construct normothermic data;

the sham operation group is as follows: drawing out nylon wires after the ligature is carried out for about 30min before the ligation in the process of constructing the myocardial I/R injury model so that blood vessels are recanalized, constructing an ischemia reperfusion injury model, drawing out the nylon wires, and simultaneously injecting 15mg/kg of physiological saline into a rat body in an intraperitoneal mode; placing the rat injected with physiological saline into another heating chamber, and maintaining the anal temperature at (37.0+ -0.5) deg.C for 2 hr; venous blood was withdrawn and the dead rats were heart-sampled; collecting venous blood and heart data to construct a prosthetic operation data set;

the clinical experiments of contrast of superficial hypothermia, normal body temperature and false operation body temperature show that the superficial hypothermia has better protection effect on the myocardial of myocardial I/R injury combined sepsis than the normal body temperature and the false operation, and provides animal research basis for the treatment of critical patients of clinical myocardial I/R injury combined sepsis.

From the above two embodiments, it can be seen that the device for forming a shallow low temperature of the present utility model can maintain animals in the device at a precise temperature, and the device for shallow low temperature experiment of the present utility model can maintain animals placed in different animals at different temperatures at the same time, so as to facilitate comparison of clinical experiments.

The above embodiments according to the present utility model are illustrative, and various changes and modifications may be made by the person skilled in the art without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the contents of the specification, and must be determined according to the scope of the claims.

The foregoing is a preferred embodiment of the present utility model, and although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (11)

1. The utility model provides a device for forming shallow low temperature, its characterized in that includes first room, second room and heat sink, the second room with adiabatic between the first room, the temperature of first room is less than the temperature of second room, the heat sink cools down the second room, and heat sink temperature rise screw in first room, first room cools down the heat sink.

2. The apparatus for forming a shallow low temperature according to claim 1, further comprising a position sensor provided with a door on the second chamber, the position sensor being adapted to sense a relative position of the cooling device to the door, the cooling device reaching a set relative position of the door, the door being opened, the cooling device being screwed into the second chamber through the door.

3. The apparatus for forming a shallow cryogenic temperature according to claim 1, further comprising a rotating shaft disposed in the first chamber, the cooling device being rotatably coupled to the rotating shaft.

4. The apparatus of claim 1, wherein the plurality of cooling means are sequentially screwed into and out of the second chamber.

5. The apparatus for forming a shallow low temperature according to claim 1, wherein the cooling apparatus comprises an ice bin containing a cooling medium.

6. The apparatus of claim 5, wherein the cooling device further comprises a suction fan, an air suction inlet of the suction fan is positioned outside the cooling device, and an air outlet of the suction fan is positioned inside the cooling device and blows air toward the ice bin.

7. The apparatus of claim 1, further comprising a third chamber, wherein the second chamber surrounds the third chamber, and wherein a cooling channel is provided between the second chamber and the third chamber.

8. The apparatus of claim 7, further comprising a plurality of through holes for communicating the second chamber with a third chamber.

9. The apparatus of any one of claims 1-8, wherein the first chamber is disposed on one or more sides of the second chamber.

10. The device for shallow low-temperature experiments is characterized by comprising an ice chamber, a heat exchanger and a heating chamber, wherein the ice chamber is provided with a cooling channel, the heating chamber is provided with a heating channel, the heat exchanger comprises a refrigerant channel and a heating medium channel, the cooling channel penetrates through the refrigerant channel of the heat exchanger, the heating channel penetrates through the heating medium channel of the heat exchanger, the cooling channel cools the refrigerant passing through the heat exchanger after the cooling temperature of the ice chamber is raised, the temperature of the heating chamber is lowered after the temperature of the heating chamber is raised, and the temperature of the heating chamber is raised through the heating medium in the heat exchanger.

11. The apparatus for shallow cryogenic experiments according to claim 10, wherein the ice chamber comprises a second chamber, a third chamber and a cooling device, the second chamber surrounding the third chamber, a cooling channel being provided between the second chamber and the third chamber, the cooling device being provided in the cooling channel; the heating chamber comprises a fourth chamber, a fifth chamber and a heater, wherein the fourth chamber is insulated from the second chamber, the fourth chamber surrounds the fifth chamber, and a heating channel is arranged between the fourth chamber and the fifth chamber.