Anesthesia apparatus and veterinary anesthesia apparatus

Abstract

The application discloses an anesthetizer and a veterinary anesthetizer. The anesthetizer comprises a driving gas branch, a fresh gas branch and a breathing circuit. The fresh gas branch is used for sending fresh gas with anesthetic gas into the breathing circuit. The driving gas branch is used for pushing the fresh gas in the breathing circuit to a patient. The driving gas branch comprises a fan assembly. The fan assembly comprises a casing, a fan and a first heat dissipation member. The casing comprises a first inner cavity, a first air inlet communicating with the first inner cavity and a first air outlet communicating with the first inner cavity. The fan is arranged in the first inner cavity. The fan is used for driving air to enter the first inner cavity from the first air inlet and blow out from the first air outlet. The fan comprises a volute, an impeller and a motor. The impeller is rotatably arranged in the volute. The motor is arranged on the volute and connected with the impeller. The surface of the motor opposite to the first air inlet is a projection surface. The orthographic projection of the first air inlet and the surface of the motor at least partially overlap.

Description

Technical Field

[0001] This application relates to the field of medical devices, and in particular to anesthesia machines and veterinary anesthesia machines. Background Technology

[0002] Existing anesthesia machines use radiators or heat pipes to conduct the heat generated by the motor to the outside, and use cooling fans for forced cooling. This cooling structure is complex and costly. Summary of the Invention

[0003] In view of this, this application proposes an anesthesia machine and a veterinary anesthesia machine.

[0004] The first aspect of this application discloses an anesthesia machine, including a driving gas branch, a fresh gas branch, and a breathing circuit. The fresh gas branch is used to deliver fresh gas containing anesthetic gas into the breathing circuit. The driving gas branch is used to push the fresh gas in the breathing circuit to the patient. The driving gas branch includes a fan assembly, which includes a housing, a fan, and a first heat sink. The housing includes a first inner cavity, a first air inlet communicating with the first inner cavity, and a first air outlet communicating with the first inner cavity. The fan is disposed within the first inner cavity and is used to drive air into the first inner cavity from the first air inlet and out from the first air outlet. The fan includes:

[0005] Snail shell;

[0006] The impeller is rotatably installed inside the volute.

[0007] An electric motor, mounted in the volute and connected to the impeller, is used to drive the impeller to rotate;

[0008] The first heat sink is installed on the motor and connected to the housing, and the first heat sink is used to conduct the heat generated by the motor to the housing.

[0009] A second aspect of this application provides an anesthesia machine, including a driving gas branch, a fresh gas branch, and a breathing circuit. The fresh gas branch is used to deliver fresh gas containing anesthetic gas into the breathing circuit. The driving gas branch is used to push the fresh gas in the breathing circuit to the patient. The driving gas branch includes a fan assembly, which includes a housing and a fan. The housing includes a first inner cavity, a first air inlet communicating with the first inner cavity, and a first air outlet communicating with the first inner cavity. The fan is disposed within the first inner cavity and is used to drive air from the first air inlet into the first inner cavity and blow it out from the first air outlet. The fan includes:

[0010] Snail shell;

[0011] The impeller is rotatably installed inside the volute.

[0012] An electric motor, mounted in the volute and connected to the impeller, is used to drive the impeller to rotate;

[0013] The first air inlet is opposite to the motor, so that most of the gas entering the first inner cavity from the first air inlet can flow over the surface of the motor to carry away the heat generated when the motor is running.

[0014] A third aspect of this application discloses a veterinary anesthesia machine, comprising a driving gas branch, a fresh gas branch, and a breathing circuit. The fresh gas branch is used to deliver fresh gas containing anesthetic gas into the breathing circuit. The driving gas branch is used to push the fresh gas in the breathing circuit to a target object. The driving gas branch includes a fan assembly, which includes a housing and a fan. The housing includes a first inner cavity, a first air inlet communicating with the first inner cavity, and a first air outlet communicating with the first inner cavity. The fan is disposed within the first inner cavity and is used to drive air into the first inner cavity from the first air inlet and out from the first air outlet. The fan includes:

[0015] Snail shell;

[0016] The impeller is rotatably installed inside the volute.

[0017] An electric motor, mounted in the volute and connected to the impeller, is used to drive the impeller to rotate;

[0018] The first air inlet is opposite to the motor, so that most of the gas entering the first inner cavity from the first air inlet can flow over the surface of the motor to carry away the heat generated when the motor is running.

[0019] As can be seen from the above technical solution, the anesthesia machine proposed in the first aspect of this application conducts the heat generated by the motor to the machine casing by setting a first heat sink, and dissipates it from the machine casing, thereby achieving a heat dissipation effect on the motor. This heat dissipation structure is simple and low in cost. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a block diagram of a partial structure of the anesthesia machine proposed in an embodiment of this application;

[0022] Figure 2 This is a schematic diagram showing the connection of the driving gas branch, the fresh gas branch, and the breathing circuit of the anesthesia machine proposed in the embodiments of this application.

[0023] Figure 3 This is a schematic diagram of the structure of the wind turbine assembly proposed in the embodiments of this application;

[0024] Figure 4 This is a first-view exploded view of the wind turbine assembly proposed in an embodiment of this application;

[0025] Figure 5 This is a second-view exploded view of the wind turbine assembly proposed in an embodiment of this application;

[0026] Figure 6 This is a schematic diagram of the structure of the first heat sink proposed in the embodiments of this application;

[0027] Figure 7 This is a schematic diagram of the structure of the first elastic support member proposed in the embodiments of this application;

[0028] Figure 8 This is a schematic diagram of the structure of the second elastic support member proposed in the embodiments of this application. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0031] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0032] like Figures 1 to 5As shown, an embodiment of this application proposes an anesthesia machine, including a driving gas branch 100, a fresh gas branch 200, and a breathing circuit 300. The fresh gas branch 200 is used to deliver fresh gas containing anesthetic gas into the breathing circuit 300. The driving gas branch 100 is used to push the fresh gas in the breathing circuit 300 to the patient. The driving gas branch 100 includes a fan assembly 10, which includes a housing 11 and a fan 12. The housing 11 includes a first inner cavity 111, a first air inlet 112 communicating with the first inner cavity 111, and a first air outlet 11 communicating with the first inner cavity 111. 3. The fan 12 is located in the first inner cavity 111. The fan 12 is used to drive air into the first inner cavity 111 from the first air inlet 112 and blow it out from the first air outlet 113. The fan 12 includes a volute 121, an impeller (not shown) and a motor 123. The impeller is rotatably installed in the volute 121. The motor 123 is installed in the volute 121 and connected to the impeller to drive the impeller to rotate. The first air inlet 112 is close to the motor 123 so that most of the air entering the first inner cavity 111 from the first air inlet 112 can flow over the surface of the motor 123 to carry away the heat generated when the motor 123 is running.

[0033] Optionally, the first air inlet 112 is opposite to the motor 123. The opposite not only includes the first air inlet 112 and the motor 123 being directly opposite each other in the air intake direction of the first air inlet 112, but also includes the first air inlet 112 and the motor 123 partially overlapping in the air intake direction of the first air inlet 112, as long as the airflow entering the first inner cavity 111 from the first air inlet 112 can reach the motor 123.

[0034] For example, Figure 2This illustration shows the connection relationship between the drive gas branch 100, the fresh gas branch 200, and the breathing circuit 300 in one embodiment. The breathing circuit 300 includes a machine-controlled drive assembly 301, a main pipe 302, an inspiratory check valve 303, a supply gas pipe 304, an expiratory check valve 305, a return gas pipe 306, and a carbon dioxide absorption tank 307. The supply gas pipe 304 is connected to one end of the main pipe 302, and the inspiratory check valve 303 and the carbon dioxide absorption tank 307 are installed in the supply gas pipe 304. The return gas pipe 306 connects the supply gas pipe 304 and the main pipe 302, and the expiratory check valve 305 is installed in the return gas pipe 306. The machine-controlled drive assembly 301 includes a bellows 3011 and a folded airbag 3012, with the folded airbag 3012 connected to the other end of the main pipe 302. The drive gas branch 100 communicates with the cavity formed by the bellows 3011 and the folded airbag 3012. The fresh gas branch 200 is connected between the inhalation check valve 303 and the carbon dioxide absorption canister 307. During operation, the patient's exhaled gas enters the folded airbag 3012 through the exhalation check valve 305 and the main pipe 302. The driving gas branch 100 provides driving gas into the cavity formed by the bellows 3011 and the folded airbag 3012. The driving gas compresses the folded airbag 3012, thereby delivering the patient's exhaled gas to the carbon dioxide absorption canister 307 through the main pipe 302. The carbon dioxide absorption canister 307 absorbs the carbon dioxide in the exhaled gas. The gas coming out of the carbon dioxide absorption canister 307 mixes with the fresh gas supplied by the fresh gas branch 200 and is delivered to the patient through the gas supply pipe 304.

[0035] The anesthesia machine proposed in this embodiment, by setting the first air inlet 112 opposite to the motor 123, allows the airflow entering the first inner cavity 111 from the first air inlet 112 to blow towards the motor 123, which can carry away the heat generated by the motor 123 during operation and achieve a heat dissipation effect on the motor 123. This embodiment cleverly utilizes the structural design of the fan assembly 10 itself, and the heat dissipation structure is simple and low in cost.

[0036] Optionally, the volute 121 includes a second inner cavity 1211, a second air inlet 1212 communicating with the second inner cavity 1211, and a second air outlet 1213 communicating with the second inner cavity 1211. The impeller is disposed in the second inner cavity 1211, and the second air outlet 1213 is communicating with the first air outlet 113. The second air inlet 1212 is disposed opposite to the first air inlet 112.

[0037] By setting the second air inlet 1212 to face away from the first air inlet 112, the air entering the first inner cavity 111 from the first air inlet 112 passes through the motor 123 and before entering the second air inlet 1212. The airflow then passes through the outer wall of the volute 121, thus carrying away the heat transferred from the motor 123 to the volute 121, further cooling the motor 123. Of course, the second air inlet 1212 is not limited to being located on the side facing away from the first air inlet 112; it can be located in other positions on the volute 121, depending on the actual design requirements.

[0038] like Figure 4 and Figure 6 As shown, optionally, the fan assembly 10 also includes a first heat sink 13 mounted on the motor 123. The first heat sink 13 can accelerate the heat dissipation of the motor 123, and has a simple structure and low cost.

[0039] Optionally, the first heat sink 13 includes a connecting portion 131 and a heat sink 132. The connecting portion 131 is connected to the motor 123, and the heat sink 132 is connected to the connecting portion 131 to increase the heat dissipation area. Of course, the first heat sink 13 may also omit the heat sink 132.

[0040] Alternatively, the connector 131 and the heat sink 132 are integrally formed, for example, by casting.

[0041] Optionally, the first heat sink 13 is made of copper-based or aluminum-based metal material. Copper-based or aluminum-based metal material has good thermal conductivity, which can provide good heat dissipation for the motor 123 and has low cost.

[0042] Optionally, the connecting part 131 is annular and is sleeved on the motor 123. The number of heat sinks 132 is multiple, and the multiple heat sinks 132 are arranged at intervals around the outer side wall of the connecting part 131.

[0043] By providing a connecting part 131 that is fitted onto the motor 123, the motor 123 can be cooled evenly and effectively. Of course, the connecting part 131 is not limited to being ring-shaped; it can also be other shapes, as long as the connecting part 131 connects the motor 123 and the heat sink 132 to achieve a cooling effect on the motor 123.

[0044] Optionally, at least one heat sink 132 includes a fixing part 1321 and two sub-heat sinks 1322. One end of the fixing part 1321 is connected to the connecting part 131, and the other end of the fixing part 1321 is connected to the two sub-heat sinks 1322. This embodiment can further expand the heat dissipation area and accelerate the heat dissipation of the motor 123.

[0045] Optionally, the fan assembly 10 further includes a second heat sink 14, which is disposed between the first heat sink 13 and the housing 11. The second heat sink 14 is used to conduct heat from the first heat sink 13 to the housing 11 and diffuse it out through the housing 11.

[0046] Optionally, the second heat sink 14 can be a flexible material, such as thermal paste, thermal adhesive, thermal pad, or liquid metal. Preferably, the second heat sink 14 is made of a flexible material, for example, a flexible thermal pad. The flexible thermal pad can reduce the vibration of the motor 123 transmitted to the housing 11 via the first heat sink 13, thus reducing noise generation. Furthermore, the first heat sink 13 can also be a flexible material, which can effectively prevent the vibration of the motor 123 from being transmitted to the housing 11.

[0047] Optionally, the housing 11 is made of metal. Metal has good thermal conductivity, allowing heat generated by the motor 123 to be quickly conducted to the housing 11 and then dissipated through it. Suitable metal materials include copper-based or aluminum-based metals. Of course, the housing 11 is not limited to metal; for example, it can also be made of thermally conductive plastic. Suitable thermally conductive plastics include PP (polypropylene), ABS (Acrylonitrile Butadiene Styrene plastic), PC (Polycarbonate), PA (Nylon Polyamide), LCP (Liquid Crystal Polymer), PPS (Phenylenesulfide), and PEEK (Peek materials).

[0048] It should be noted that the housing 11 does not necessarily need to be made entirely of metal or thermally conductive plastic. In some embodiments, only part of the first heat sink 13 contacts the housing 11 through the second heat sink 14. In this embodiment, it is also possible to set the housing 11 so that only the side wall in contact with the second heat sink 14 is made of metal or thermally conductive plastic.

[0049] Optionally, the heat sink 132 includes a first end 1323 and a second end 1324. The first end 1323 is connected to the connecting part 131. At least a portion of the second end 1324 of the heat sink 132 is provided with a contact part 1325 that is angled to the heat sink 132. Multiple contact parts 1325 are arranged on the same plane, or multiple contact parts 1325 are connected to form a contact plate. The second heat sink 14 is sandwiched between the contact part 1325 and the housing 11.

[0050] By setting contact portions 1325 and setting multiple contact portions 1325 on the same plane or connecting them into a contact plate, it is convenient to connect the heat sink 132 and the housing 11. At the same time, it can increase the contact area between the heat sink 132 and the housing 11 and accelerate the heat transfer from the heat sink 132 to the housing 11.

[0051] like Figures 4 to 5 , Figures 7 to 8 As shown, optionally, the fan assembly 10 further includes a first elastic support 15 and a second elastic support 16. The housing 11 includes a top plate 114 and a bottom plate 115 opposite to the top plate 114. The first elastic support 15 is sandwiched between the top plate 114 and the top of the fan 123, and the second elastic support 16 is sandwiched between the bottom plate 115 and the bottom of the fan 123. The first elastic support 15 and the second elastic support 16 can play a role in shock absorption, preventing the vibration of the fan 123 during operation from being directly transmitted to the housing 11 and causing noise.

[0052] Optionally, the first elastic support 15 and the second elastic support 16 are made of silicone.

[0053] Optionally, the top plate 114 of the housing 11 has a mounting portion 116 protruding towards the first inner cavity 111, and the first elastic support member 15 has a mounting groove 151 that matches the shape of the mounting portion 116. The first elastic support member 15 is mounted on the top plate 114 by means of the mounting portion 116 being embedded in the mounting groove 151, and the top of the fan 123 abuts against the first elastic support member 15.

[0054] For example, there are four mounting parts 116, which are distributed circumferentially at equal intervals. The first elastic support member 15 includes a body 152 and four petals 153 that are distributed circumferentially around the body 152 at equal intervals. Each petal 153 is provided with a mounting groove 151, and the four mounting parts 116 are respectively embedded in the four petals 153.

[0055] Optionally, the second elastic support 16 is arranged around the second air inlet 1212, and the side wall of the second elastic support 16 has a notch 161 communicating with the second air inlet 1212. Gas enters the second air inlet 1212 through the notch 161 and then enters the second inner cavity 1211 from the second air inlet 1212. In some other embodiments, the side wall of the second elastic support 16 may not have a notch 161. For example, the second elastic support 16 can be configured to be spaced apart from the base plate 115, and gas enters the second air inlet 1212 from the side of the second elastic support 16 facing the base plate 115.

[0056] Optionally, the base plate 115 of the housing 11 has protruding mounting posts 117, and the bottom of the second elastic support 16 has mounting holes 162. The second elastic support 16 is mounted to the base plate 115 by means of mounting posts 117 being embedded in mounting holes 162, and the bottom of the fan 123 abuts against the second elastic support 16. For example, there are three mounting posts 117 and three mounting holes 162, with the three mounting posts 117 respectively embedded in the three mounting holes 162.

[0057] Optionally, the inner sidewall of the second elastic support member 16 is provided with a plurality of spaced support ribs 163, and the bottom of the fan 123 abuts against the support ribs 163. The support ribs 163 can reduce the contact area between the fan 123 and the second elastic support member 16, and reduce the vibration of the fan 123 transmitted to the base plate 115 through the second elastic support member 16.

[0058] Optionally, the anesthesia machine also includes a fan (not shown) located outside the housing 11. The fan is used to generate airflow towards the housing 11. The airflow can carry away the heat of the housing 11, accelerate the heat dissipation of the housing 11, and thus accelerate the heat dissipation of the motor 123.

[0059] like Figures 3 to 5 As shown, optionally, the housing 11 further includes a third inner cavity 118 and a third air inlet 119 communicating with the third inner cavity 118. The third inner cavity 118 is connected to the first inner cavity 111 via a first air inlet 112. The fan assembly 10 also includes a first noise reduction component 17 disposed in the third inner cavity 118, which is used to reduce fan noise discharged from the third air inlet 119.

[0060] By setting the first noise reduction component 17 in the third inner cavity 118 to reduce the fan noise discharged from the third air inlet 119, the impact of noise on the patient can be effectively reduced.

[0061] Optionally, the first noise reduction component 17 is provided with a noise reduction channel 171, one end of which is connected to the first air inlet 112, and the other end of which is connected to the third air inlet 119. On the one hand, the noise reduction channel 171 is used to connect the first air inlet 112 and the third air inlet 119, so that outside air of the fan component 10 can enter the first inner cavity 111 through the third air inlet 119, the noise reduction channel 171 and the first air inlet 112. On the other hand, the noise reduction channel 171 is used to reduce the noise generated by the fan 123 during operation from spreading out through the third air inlet 119.

[0062] Optionally, the noise reduction channel 171 is spiral-shaped. Noise, after circling multiple times within the spiral noise reduction channel 171, can be effectively absorbed by the first noise reduction component 17, thus achieving a good noise reduction effect. Of course, the noise reduction channel 171 is not limited to a spiral shape; for example, it can also be snake-shaped, L-shaped, straight, or honeycomb-shaped, depending on the actual design requirements.

[0063] Optionally, the first noise reduction component 17 includes an upper clamping plate 172, a lower clamping plate 173, and a spiral structural member 174 clamped between the upper clamping plate 172 and the lower clamping plate 173. The upper clamping plate 172, the lower clamping plate 173, and the spiral structural member 174 enclose a noise reduction channel 171. The lower clamping plate 173 has an opening 1731 that connects the noise reduction channel 171 and the first air inlet 112. The first noise reduction component 17, formed by combining the upper clamping plate 172, the lower clamping plate 173, and the spiral structural member 174, is easy to manufacture and assemble.

[0064] Optionally, the first noise reduction component 17 is a first noise reduction component made of porous foam material. For example, the porous foam material can be sound-absorbing sponge, which has good sound absorption effect and low cost.

[0065] Optionally, one of the first noise reduction component 17 and the top plate 114 is provided with a foolproof hole 1732, and the other of the first noise reduction component 17 and the top plate 114 is provided with a foolproof post (not shown), which passes through the foolproof hole 1732. By providing the cooperation of the foolproof post and the foolproof hole 1732, the assembly of the first noise reduction component 17 is facilitated, and the situation where the first noise reduction component 17 blocks the first air inlet 112 and the third air inlet 119 due to incorrect installation of the first noise reduction component 17 can be effectively avoided.

[0066] Optionally, the housing 11 also includes a fourth inner cavity 11a and a third air outlet 11b communicating with the fourth inner cavity 11a. The fourth inner cavity 11a is connected to the first inner cavity 111 through a first air outlet 113.

[0067] Optionally, a second noise reduction component is provided in the fourth inner cavity 11a. The second noise reduction component is used to reduce the fan noise discharged from the third air outlet 11b. The setting method of the second noise reduction component can refer to the first noise reduction component 17, and will not be described in detail here.

[0068] Optionally, the inner wall of the first inner cavity 111 is provided with noise-reducing sponge, which further reduces the noise of the operation of the fan 123.

[0069] like Figures 1 to 5As shown, embodiments of this application also propose a veterinary anesthesia machine, including a driving gas branch 100, a fresh gas branch 200, and a breathing circuit 300. The fresh gas branch 200 is used to deliver fresh gas containing anesthetic gas into the breathing circuit 300. The driving gas branch 100 is used to push the fresh gas in the breathing circuit 300 to the patient. The driving gas branch 100 includes a fan assembly 10, which includes a housing 11, a fan 12, and a first heat sink 13. The housing 11 includes a first inner cavity 111, a first air inlet 112 communicating with the first inner cavity 111, and a connecting... The first air outlet 113 of the first inner cavity 111, the fan 12 is disposed in the first inner cavity 111, the fan 12 is used to drive air into the first inner cavity 111 from the first air inlet 112 and blow it out from the first air outlet 113. The fan 12 includes a volute 121, an impeller (not shown) and a motor 123. The impeller is rotatably installed in the volute 121. The motor 123 is installed in the volute 121 and connected to the impeller, and is used to drive the impeller to rotate. The first heat sink 13 is installed in the motor 123 and connected to the housing 11. The first heat sink 13 is used to conduct the heat generated by the motor 123 to the housing 11.

[0070] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An anesthesia machine, characterized in that, The device includes a driving gas branch, a fresh gas branch, and a breathing circuit. The fresh gas branch delivers fresh gas containing anesthetic gas into the breathing circuit. The driving gas branch pushes the fresh gas in the breathing circuit to the patient. The driving gas branch includes a fan assembly, which includes a housing, a fan, and a second elastic support. The housing includes a first inner cavity, a first air inlet communicating with the first inner cavity, and a first air outlet communicating with the first inner cavity. The fan is disposed within the first inner cavity and drives air to enter the first inner cavity from the first air inlet and exit from the first air outlet. The housing includes a top plate and a bottom plate opposite to the top plate. The second elastic support is sandwiched between the bottom plate and the bottom of the fan. The fan includes: The volute, including the second air inlet; The impeller is rotatably mounted inside the volute. An electric motor, mounted in the volute and connected to the impeller, is used to drive the impeller to rotate; The first air inlet is opposite to the motor so that most of the gas entering the first inner cavity from the first air inlet can flow over the surface of the motor to carry away the heat generated when the motor is running. The second air inlet of the volute is arranged opposite to the first air inlet.

2. The anesthesia machine as described in claim 1, characterized in that, The fan assembly further includes a first heat sink, which is mounted on the motor and connected to the housing. The first heat sink is used to conduct the heat generated by the motor to the housing.

3. The anesthesia machine as described in claim 2, characterized in that, The first heat sink includes: The connecting part is connected to the motor; A heat sink is connected to the connecting part to increase the heat dissipation area.

4. The anesthesia machine as described in claim 3, characterized in that, The connecting part is ring-shaped and is sleeved on the motor. There are multiple heat sinks, which are spaced apart around the outer wall of the connecting part.

5. The anesthesia machine as described in claim 4, characterized in that, The fan assembly further includes a second heat sink, which is disposed between the first heat sink and the housing, and is used to direct the heat from the first heat sink to the housing.

6. The anesthesia machine as described in claim 5, characterized in that, The heat sink includes a first end and a second end. The first end is connected to the connecting part. At least a portion of the second end of the heat sink is provided with a contact part that is angled to the heat sink. Multiple contact parts are arranged on the same plane, or multiple contact parts are connected to form a contact plate. The second heat sink is sandwiched between the contact part and the housing.

7. The anesthesia machine as described in claim 5, characterized in that, The first heat sink and / or the second heat sink are made of flexible material.

8. The anesthesia machine as described in claim 5, characterized in that, It also includes a fan located outside the housing, the fan being used to generate airflow toward the housing.

9. The anesthesia machine as described in claim 5, characterized in that, The housing is made of metal or thermally conductive plastic, or the sidewall of the housing that contacts the second heat sink is made of metal or thermally conductive plastic.

10. The anesthesia machine as described in claim 1, characterized in that, The volute also includes a second inner cavity and a second air outlet. The second air inlet and the second air outlet are connected to the second inner cavity. The impeller is disposed in the second inner cavity, and the second air outlet is connected to the first air outlet.

11. The anesthesia machine as described in claim 1, characterized in that, The wind turbine assembly also includes a first elastic support member, which is sandwiched between the top plate and the top of the wind turbine.

12. The anesthesia machine as described in claim 11, characterized in that, The second elastic support is arranged around the second air inlet, and the side wall of the second elastic support is provided with a notch that connects to the second air inlet.

13. The anesthesia machine as described in claim 12, characterized in that, The projection profile of the second elastic support member on the base plate is C-shaped.

14. The anesthesia machine as described in claim 1, characterized in that, The inner wall of the second elastic support member is provided with a number of spaced-apart support ribs, and the bottom of the fan abuts against the support ribs.

15. The anesthesia machine as described in claim 1, characterized in that, The second elastic support is arranged around the second air inlet, and the second elastic support is spaced apart from the base plate, so that gas enters the second air inlet from the side of the second elastic support toward the base plate.

16. The anesthesia machine as described in claim 1, characterized in that, The second elastic support member has a recessed portion on the side facing the fan, and the side of the volute with the second air inlet is embedded in the recessed portion and abuts against the second elastic support member.

17. The anesthesia machine as described in claim 1, characterized in that, The bottom plate of the housing has a protruding mounting post, and the bottom of the second elastic support member has a mounting hole. The second elastic support member is installed on the bottom plate by means of the mounting post being embedded in the mounting hole, and the bottom of the fan abuts against the second elastic support member.

18. The anesthesia machine as described in claim 17, characterized in that, The number of mounting posts is three, and the number of mounting holes is three, with the three mounting posts respectively embedded in the three mounting holes.

19. A veterinary anesthesia machine, characterized in that, The device includes a driving gas branch, a fresh gas branch, and a breathing circuit. The fresh gas branch delivers fresh gas containing anesthetic gas into the breathing circuit. The driving gas branch propels the fresh gas in the breathing circuit to the target object. The driving gas branch includes a fan assembly, which comprises a housing, a fan, and a second elastic support. The housing includes a first inner cavity, a first air inlet communicating with the first inner cavity, and a first air outlet communicating with the first inner cavity. The fan is disposed within the first inner cavity and drives air to enter the first inner cavity from the first air inlet and exit from the first air outlet. The housing includes a top plate and a bottom plate opposite to the top plate. The second elastic support is sandwiched between the bottom plate and the bottom of the fan. The fan includes: The volute, including the second air inlet; The impeller is rotatably mounted inside the volute. An electric motor, mounted in the volute and connected to the impeller, is used to drive the impeller to rotate; The first air inlet is opposite to the motor so that most of the gas entering the first inner cavity from the first air inlet can flow over the surface of the motor to carry away the heat generated when the motor is running. The second air inlet is positioned opposite to the first air inlet.

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