CN219127504U - Transesophageal ultrasonic probe sterilizer - Google Patents

Abstract

The utility model relates to the technical field of medical equipment, in particular to a transesophageal ultrasonic probe sterilizer, which comprises a box main body, a box cover and a sterilization assembly, wherein a first accommodating space is arranged in the box main body; the box cover is arranged on the box main body, and a second accommodating space is arranged in the box cover; the sterilizing component comprises a groove part and a cover part, the groove part is arranged in the first accommodating space, the cover part is arranged in the second accommodating space, and the cover part and the groove part are enclosed to form a sterilizing cavity; a first ventilation cavity is formed between the groove part and the wall surface of the box main body, and a first air duct is formed in the first ventilation cavity and used for radiating heat generated by the groove part to the external environment; a second ventilation cavity is formed between the cover part and the wall surface of the box cover, and a second air duct is formed in the second ventilation cavity and used for radiating heat generated by the cover part to the external environment. The technical scheme of the utility model aims to discharge heat generated by the ultraviolet lamp out of the sterilizer, so as to avoid damage to the transesophageal ultrasonic probe.

Description

Transesophageal ultrasonic probe sterilizer

Technical Field

The utility model relates to the technical field of medical equipment, in particular to a transesophageal ultrasonic probe sterilizer.

Background

Transesophageal ultrasonic probes generally include an insertion tube portion that contacts the human body and a connection tube body that connects the insertion tube portion with the apparatus main body, and in order to prevent cross infection during the inspection, at least the insertion tube portion that contacts the human body needs to be cleaned and sterilized at a high level after use during observation, diagnosis, treatment, and the like.

In the related art, when the transesophageal ultrasonic probe is sterilized, the transesophageal ultrasonic probe is usually placed in a sterilizing cavity of a sterilizer, and is sterilized by irradiation of ultraviolet lamps, a plurality of ultraviolet lamps are usually arranged in the sterilizing cavity in order to improve sterilizing efficiency and enhance sterilizing effect, however, a plurality of ultraviolet lamps work simultaneously to generate a large amount of heat, and if the temperature is too high, damage is caused to the transesophageal ultrasonic probe.

Disclosure of Invention

The utility model mainly aims to provide a transesophageal ultrasonic probe sterilizer, which aims to discharge heat generated by an ultraviolet lamp out of the sterilizer and avoid damage to the transesophageal ultrasonic probe.

In order to achieve the above object, the transesophageal ultrasonic probe sterilizer provided by the present utility model comprises a case main body, wherein a first accommodating space is provided in the case main body;

the box cover is covered on the box main body, and a second accommodating space is formed in the box cover; and

the disinfection assembly comprises a groove part and a cover part, the groove part is arranged in the first accommodating space, the cover part is arranged in the second accommodating space, and the cover part and the groove part are enclosed to form a disinfection cavity;

a first ventilation cavity is formed between the groove part and the wall surface of the box main body, and a first air duct is formed in the first ventilation cavity and used for radiating heat generated by the groove part to the external environment;

a second ventilation cavity is formed between the cover part and the wall surface of the box cover, and a second air duct is formed in the second ventilation cavity and used for radiating heat generated by the cover part to the external environment.

In an embodiment of the present application, the first air duct includes:

the first air inlet channel is arranged between the bottom wall of the groove part and the bottom wall of the box main body, and is provided with a plurality of first air inlets which are sequentially arranged at intervals along the circumferential direction of the box main body and used for sucking air into the first ventilation cavity; and

the first air outlet channel, first air outlet channel set up in between the lateral wall of slot part with the lateral wall of case main part, first air outlet channel is provided with a plurality of first air outlets, and is a plurality of first air outlets are followed the circumference of case main part is interval set gradually for with the heat is discharged first ventilation chamber.

In an embodiment of the present application, an air inlet fan is disposed at each first air inlet;

and each first air outlet is provided with an air outlet fan.

In an embodiment of the present application, a side of each side wall of the groove facing away from the disinfection cavity is connected with a plurality of first heat dissipation fins, which are used for transferring heat generated by the side wall of the groove;

and one side of the bottom wall of the groove part, which is away from the disinfection cavity, is connected with a plurality of second radiating fins for transferring heat generated by the bottom wall of the groove part.

In an embodiment of the present application, a plurality of first exhaust fans are disposed on a side of the plurality of first heat dissipation fins facing away from the groove, and the plurality of first exhaust fans are arranged on a side of the plurality of second heat dissipation fins in an array manner;

the air flowing in from the first air inlet is blown to the first radiating fins through the first exhaust fan, flows into the first air outlet channel after passing through the first radiating fins, and flows out from the first air outlet after passing through the second radiating fins.

In an embodiment of the present application, the second air duct includes a second air inlet channel and a second air outlet channel, the second air inlet channel is provided with two, two the second air inlet channel is located respectively the both sides of second ventilation chamber, the second air outlet channel is located two between the second air inlet channel.

In an embodiment of the present application, a side of the cover facing away from the disinfection cavity is connected with a plurality of third heat dissipation fins, which are used for transferring heat generated by the cover.

In an embodiment of the present application, each of the third heat dissipating fins is disposed to extend along a length direction of the case cover.

In an embodiment of the present application, a plurality of second exhaust fans are disposed on a side of the plurality of third heat dissipation fins facing away from the cover portion, and the plurality of second exhaust fans are arranged on a side of the plurality of third heat dissipation fins in an array manner;

the air flowing in from the two second air inlet channels is blown to the third radiating fins through the second exhaust fans, and the two air flows in the second air outlet channels after passing through the third radiating fins and flows out from the second air outlet channels.

In an embodiment of the present application, a fourth heat dissipation fin is further disposed in the second ventilation cavity, and the fourth heat dissipation fin is disposed in the second air inlet channel and extends along a width direction of the case cover.

The technical scheme of the utility model is that a first ventilation cavity is arranged between a groove part of a disinfection assembly and the wall surface of a box main body, and a first air duct is arranged in the first ventilation cavity and used for radiating heat generated by the groove part to the external environment; and a second air duct is arranged between the cover part and the wall surface of the box cover and is used for radiating heat generated by the cover part to the external environment. It is possible to avoid damage to the transesophageal ultrasound probe due to excessive temperatures of the cover portion and the groove portion.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of the structure of an embodiment of a transesophageal ultrasound probe sterilizer of the present utility model;

FIG. 2 is a back view of an embodiment of a transesophageal ultrasound probe sterilizer of the present utility model;

FIG. 3 is a cross-sectional view at A-A in FIG. 2;

FIG. 4 is a cross-sectional view at B-B in FIG. 2;

FIG. 5 is a top view of the transesophageal ultrasound probe sterilizer of the present utility model;

fig. 6 is a cross-sectional view at C-C in fig. 5.

Reference numerals illustrate:

the achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout is meant to include three side-by-side schemes, for example, "a and/or B", including a scheme, or B scheme, or a scheme that is satisfied by both a and B. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

In the related art, when the transesophageal ultrasonic probe is sterilized, the transesophageal ultrasonic probe is usually placed in a sterilizing cavity of a sterilizer, and is sterilized by irradiation of ultraviolet lamps, a plurality of ultraviolet lamps are usually arranged in the sterilizing cavity in order to improve sterilizing efficiency and enhance sterilizing effect, however, a plurality of ultraviolet lamps work simultaneously to generate a large amount of heat, and if the temperature is too high, damage is caused to the transesophageal ultrasonic probe.

In order to solve the above-mentioned technical problems, referring to fig. 1 to 6, the present utility model proposes a sterilizer for a transesophageal ultrasonic probe 100, which comprises a case body 10, a case cover 30 and a sterilization assembly 50, wherein a first accommodating space is provided in the case body 10; the case cover 30 is covered on the case main body 10, and a second accommodating space is arranged in the case cover 30; the sterilizing unit 50 comprises a groove part 51 and a cover part 53, wherein the groove part 51 is arranged in the first accommodating space, the cover part 53 is arranged in the second accommodating space, and the cover part 53 and the groove part 51 are enclosed to form a sterilizing cavity; a first ventilation chamber 11 is formed between the groove 51 and the wall surface of the tank body 10, and a first air duct 110 is formed in the first ventilation chamber 11 for radiating heat generated by the groove 51 to the external environment; a second ventilation chamber 31 is formed between the cover 53 and the wall surface of the case cover 30, and a second air duct 310 is formed in the second ventilation chamber 31 for radiating heat generated from the cover 53 to the external environment.

As can be appreciated, transesophageal ultrasound is to place a dedicated transesophageal ultrasound probe 100 transorally into the esophagus of a subject, scan forward from behind the subject's heart, and probe the subject's heart structure closely. The insertion tube of the transesophageal ultrasound probe 100 is long and is typically suspended in a vertical sterilization case for adequate sterilization. That is, the transesophageal ultrasonic probe 100 is fixed to the top of the vertical sterilizer by the bracket such that the insertion tube is suspended in the sterilization chamber, and the transesophageal ultrasonic probe 100 is sufficiently sterilized by the ultraviolet lamp in the sterilization chamber. Because the insertion tube is longer, the height of hanging is higher, and it is very inconvenient for the nurse of shorter stature to take. The horizontal sterilizer can avoid the problems, the horizontal sterilizer passing through the esophagus ultrasonic probe 100 can comprise a box main body 10, a box cover 30 and a sterilizing component 50, the box main body 10 can be cuboid, one surface with a large area is used as the bottom, the surface can be placed on a desktop, the space is saved, the interior of the box main body 10 can be enclosed by four side walls and the bottom wall to form a first accommodating space, a power supply, a heat dissipation structure, a part of sterilizing component 50 and the like can be installed in the first accommodating space, the box main body 10 is covered by the box cover 30, a second accommodating space is arranged in the box cover 30, a heat dissipation structure, a part of sterilizing component 50 and the like can be installed, and a closed cavity is formed after the box cover 30 and the box body are covered. The disinfection assembly 50 may include a groove portion 51 and a cover portion 53, the groove portion 51 may be disposed in a first volume space, side walls and bottom walls of the groove portion 51 may be provided with heat dissipation structures, such as heat dissipation fins, and may support and fix the groove portion 51, where the volume of the groove portion 51 is smaller than that of the first volume space, and is equivalent to that of the liner structure, the groove portion 51 may be fixedly installed on an open edge of the first volume hole member by fixing a mounting frame to start a notch in the center of the mounting frame, so that the groove portion 51 is disposed through the notch, and the edge of the groove portion 51 is fixedly installed on the notch of the mounting frame by screws, and is fixedly supported in cooperation with the heat dissipation fins, so that the groove portion 51 is kept stable in the first volume space. The cover 53 is mounted and fixed in the second volume in the same manner, and the cover 53 and the groove 51 of the sterilizing unit 50 form a closed sterilizing chamber when the cover 30 and the box body 10 are closed.

It should be explained that the transesophageal ultrasonic probe 100 may be coiled at the bottom wall of the disinfection cavity, and a supporting block may be disposed at the bottom wall of the disinfection cavity to support and fix the transesophageal ultrasonic probe 100; a probe cover can also be arranged, the probe cover can be composed of an upper cover body and a lower cover body which are mutually covered, a fixing groove is concavely arranged in the probe cover, the fixing groove can be spirally coiled to the edge of the center of the probe cover, and the transesophageal ultrasonic probe 100 is placed in the fixing groove for disinfection. It should be noted that the probe cover may be made of a light-transmitting material, such as quartz glass, or may be provided with a plurality of light holes.

It should be explained that the volume of the sterilizer can be reduced after the transesophageal ultrasonic probe 100 is wound in the sterilization chamber, and the sterilizer can be configured as a horizontal sterilizer for easy taking, but the density of the sterilizing lamps in the sterilization chamber needs to be increased, so that the sterilization efficiency is not affected due to the winding of the transesophageal ultrasonic probe 100. In order to avoid damaging the transesophageal ultrasonic probe 100 while sterilizing, a first ventilation chamber 11 may be provided between the groove 51 and the wall surface of the tank body 10, and a first air duct 110 may be provided in the first ventilation chamber 11 to radiate heat generated by the groove 51 to the external environment. A second ventilation chamber 31 is formed between the cover 53 and the wall surface of the case cover 30, and a second air duct 310 is provided in the second ventilation chamber 31 to radiate heat generated from the cover 53 to the outside environment.

Further, the first air duct 110 includes a first air inlet channel 1101 and a first air outlet channel 1103, the first air inlet channel 1101 is disposed between the bottom wall of the slot portion 51 and the bottom wall of the box main body 10, the first air inlet channel 1101 is provided with a plurality of first air inlets 1101a, and the plurality of first air inlets 1101a are sequentially disposed at intervals along the circumferential direction of the box main body 10, for sucking air into the first ventilation cavity 11; the first air outlet channel 1103 is disposed between the side wall of the slot 51 and the side wall of the box body 10, the first air outlet channel 1103 is provided with a plurality of first air outlets 1103a, and the plurality of first air outlets 1103a are sequentially disposed at intervals along the circumferential direction of the box body 10 for discharging heat out of the first ventilation chamber 11.

It will be appreciated that a first air intake duct may be provided between the bottom wall of the groove portion 51 and the bottom wall of the box main body 10, a plurality of first air inlets 1101a may be provided along the first air intake duct circumference, may be provided on the rear side and both side walls of the box main body 10, and a mesh cover may be provided on the first air inlets 1101a, and dust may be prevented from entering. A first air outlet channel 1103 is provided between the side wall of the tank portion 51 and the side wall of the box main body 10, and after the air enters the first air inlet channel 1101, the air enters the first air outlet channel 1103 along the side wall of the tank portion 51, and the heat generated at the bottom of the tank portion 51 and the side wall of the tank portion 51 is taken away and discharged to the external environment.

Further, an air inlet fan is disposed at each first air inlet 1101 a; an outlet fan is disposed at each first air outlet 1103 a. It will be appreciated that, in order to accelerate the ventilation, an intake fan may be provided at the first air inlet 1101a, cool air from the outside may be sucked into the first ventilation chamber 11, and an exhaust fan may be provided at each air outlet, so that heat may be accelerated to the outside.

Further, a plurality of first heat dissipation fins 511 are connected to a side of each side wall of the groove 51 facing away from the disinfection chamber, for transferring heat generated by the side wall of the groove 51; a plurality of second heat dissipation fins 513 are connected to a side of the bottom wall of the groove 51 facing away from the sterilizing chamber, and are used for transferring heat generated by the bottom wall of the groove 51.

It can be appreciated that a plurality of first heat dissipation fins 511 may be thermally coupled to each side wall of the slot 51, so that heat of the slot 51 can be transferred to the first heat dissipation fins 511 and carried away through the first air outlet channel 1103.

Further, a plurality of first exhaust fans 113 are disposed on a side of the plurality of first heat dissipation fins 511 away from the groove 51, and the plurality of first exhaust fans 113 are arranged on a side of the plurality of second heat dissipation fins 513 in an array manner; the air flowing in from the first air inlet 1101a is blown to the first heat dissipating fins 511 by the first exhaust fan 113, flows into the first air outlet channel 1103 after passing through the first heat dissipating fins 511, and flows out from the first air outlet 1103a after passing through the second heat dissipating fins 513.

It can be appreciated that a plurality of first exhaust fans 113 may be installed at one side of the first heat dissipation fins 511 away from the groove 51, the first exhaust fans 113 are fixed on the bottom wall of the groove 51 by screws, and the first exhaust fans 113 may suck cool air into the first heat dissipation fins 511 and take heat of the first heat dissipation fins 511 away from the first air outlet channel 1103 when rotating; part of the cold air in the first air inlet channel 1101 flows through the second heat dissipation fins 513, and takes away the heat of the second heat dissipation fins 513, and is discharged to the outside through the first air outlet 1103 a.

In an embodiment of the present application, the second air duct 310 includes two second air inlet channels 3101 and two second air outlet channels 3103, the two second air inlet channels 3101 are respectively located at two sides of the second air ventilation cavity 31, and the second air outlet channel 3103 is located between the two second air inlet channels 3101.

As can be appreciated, the second air inlet channel 3101 and the second air outlet channel 3103 are formed in the second air cavity 31, two second air inlet channels 3101 may be provided and located at two sides of the second air cavity 31, the second air outlet channel 3103 is disposed between the two second air inlet channels 3101, and air enters the second air cavity 31 from the second air inlet channels 3101 at two sides, flows through the cover 53, and then takes away heat generated by the cover 53 and flows out through the second air outlet channel 3103. The second air outlet channels 3103 may be disposed on two sides of the second air ventilation cavity 31, the second air inlet channel 3101 is disposed between the two second air outlet channels 3103, and cold air is sucked into the second air ventilation cavity 31 through the second air inlet channel 3101 and is carried to the outside through the two second air outlet channels 3103, so as to transfer heat generated by the cover 53 to the outside.

Further, a plurality of third heat dissipation fins 531 are connected to a side of the cover 53 facing away from the sterilization chamber, for transferring heat generated by the cover 53. It can be appreciated that the back surface of the cover 53 is thermally coupled to a plurality of third heat dissipating fins 531, so that heat generated by the cover 53 can be transferred to the third heat dissipating fins 531, and the heat of the third heat dissipating fins 531 can be taken away to the outside through the second air outlet channel 3103.

Further, each third heat dissipation fin 531 is extended along the length direction of the case cover 30.

As can be appreciated, the third heat dissipation fins 531 are arranged on the back surface of the cover 53 in an array, each third heat dissipation fin 531 is extended along the length direction of the case cover 30, and the air entering through the second air intake channel 3101 flows into the second air outlet channel 3103 along the heat dissipation fins, and then the heat is discharged from the second air outlet channel 3103.

Further, a plurality of second exhaust fans 313 are disposed on a side of the third heat dissipation fins 531 away from the cover 53, and the plurality of second exhaust fans 313 are arranged on a side of the third heat dissipation fins 531 in an array manner;

the air flowing in from the two second air inlet channels 3101 is blown to the third heat dissipation fins 531 by the second exhaust fan 313, and the two air flows in the second air outlet channel 3103 after passing through the third heat dissipation fins 531, and flows out from the second air outlet channel 3103.

It can be appreciated that a plurality of second exhaust fans 313 may be arranged in an array on one side of the third heat dissipation fins 531 away from the cover 53, after the air enters the second ventilation cavity 31 from the second air inlet channel 3101, the air is blown to the third heat dissipation fins 531 by the second exhaust fans 313, and the heat of the third heat dissipation fins 531 is taken away, the second air inlet channels 3101 on two sides form negative pressure at the second air outlet channel 3103 through the diversion of the second exhaust fans 313, and then the heat is taken out from the second air outlet channel 3103 to the outside.

Further, a fourth heat dissipation fin 533 is further disposed in the second ventilation cavity 31, and the fourth heat dissipation fin 533 is disposed in the second air intake channel 3101 and extends along the width direction of the case cover 30.

As can be appreciated, the second air intake channel 3101 is further provided with a fourth heat dissipation fin 533, the fourth heat dissipation fin 533 is extended along the width direction of the case cover 30, and the air in the second air intake channel 3101 flows out along the fourth heat dissipation fin 533, so that heat of the fourth heat dissipation fin 533 can be taken away.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims (10)

1. A transesophageal ultrasonic probe sterilizer, which is characterized by comprising

The box body is internally provided with a first accommodating space;

the box cover is covered on the box main body, and a second accommodating space is formed in the box cover; and

the disinfection assembly comprises a groove part and a cover part, the groove part is arranged in the first accommodating space, the cover part is arranged in the second accommodating space, and the cover part and the groove part are enclosed to form a disinfection cavity;

a first ventilation cavity is formed between the groove part and the wall surface of the box main body, and a first air duct is formed in the first ventilation cavity and used for radiating heat generated by the groove part to the external environment;

a second ventilation cavity is formed between the cover part and the wall surface of the box cover, and a second air duct is formed in the second ventilation cavity and used for radiating heat generated by the cover part to the external environment.

2. The transesophageal ultrasound probe sterilizer of claim 1, wherein the first air tunnel includes:

the first air inlet channel is arranged between the bottom wall of the groove part and the bottom wall of the box main body, and is provided with a plurality of first air inlets which are sequentially arranged at intervals along the circumferential direction of the box main body and used for sucking air into the first ventilation cavity; and

the first air outlet channel, first air outlet channel set up in between the lateral wall of slot part with the lateral wall of case main part, first air outlet channel is provided with a plurality of first air outlets, and is a plurality of first air outlets are followed the circumference of case main part is interval set gradually for with the heat is discharged first ventilation chamber.

3. The transesophageal ultrasonic probe sterilizer of claim 2, wherein an intake fan is provided at each of the first air intakes;

and each first air outlet is provided with an air outlet fan.

4. The transesophageal ultrasonic probe sterilizer of claim 2, wherein each side wall of the tank portion facing away from the sterilization chamber is connected with a plurality of first heat dissipation fins for transferring heat generated from the side wall of the tank portion;

and one side of the bottom wall of the groove part, which is away from the disinfection cavity, is connected with a plurality of second radiating fins for transferring heat generated by the bottom wall of the groove part.

5. The transesophageal ultrasonic probe sterilizer of claim 4, wherein a plurality of first exhaust fans are arranged on one side of the plurality of first heat radiating fins away from the groove part, and the plurality of first exhaust fans are arranged on one side of the plurality of second heat radiating fins in an array manner;

the air flowing in from the first air inlet is blown to the first radiating fins through the first exhaust fan, flows into the first air outlet channel after passing through the first radiating fins, and flows out from the first air outlet after passing through the second radiating fins.

6. The transesophageal ultrasonic probe sterilizer of claim 1, wherein the second air duct includes a second air inlet channel and a second air outlet channel, the second air inlet channel is provided with two, the two second air inlet channels are respectively located at two sides of the second ventilation cavity, and the second air outlet channel is located between the two second air inlet channels.

7. The transesophageal ultrasound probe sterilizer of claim 6, wherein a side of the cover facing away from the sterilization chamber is connected with a plurality of third heat dissipating fins for transferring heat generated by the cover.

8. The transesophageal ultrasound probe sterilizer of claim 7, wherein each of the third heat fins extends along the length of the tank cover.

9. The transesophageal ultrasonic probe sterilizer of claim 8, wherein a plurality of second exhaust fans are arranged on a side of the third heat radiation fins away from the cover part, and the second exhaust fans are arranged on a side of the third heat radiation fins in an array manner;

the air flowing in from the two second air inlet channels is blown to the third radiating fins through the second exhaust fans, and the two air flows in the second air outlet channels after passing through the third radiating fins and flows out from the second air outlet channels.

10. The transesophageal ultrasonic probe sterilizer of claim 6, wherein a fourth heat dissipating fin is further disposed in the second ventilation chamber, the fourth heat dissipating fin being disposed in the second air intake passage and extending in a width direction of the case cover.

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