WO2023098321A1

WO2023098321A1 - Therapeutic handpiece

Info

Publication number: WO2023098321A1
Application number: PCT/CN2022/125879
Authority: WO
Inventors: 姜明尧
Original assignee: 上海微创惟美医疗科技(集团)有限公司
Priority date: 2021-12-03
Filing date: 2022-10-18
Publication date: 2023-06-08
Also published as: CN116211439A

Abstract

A therapeutic handpiece, comprising a semiconductor refrigeration sheet (10), a heat exchanger (20) and a cold conduction bottom plate (30), wherein the heat exchanger (20) covers one side of the semiconductor refrigeration sheet (10), and the cold conduction bottom plate (30) is arranged on the other side of the semiconductor refrigeration sheet (10); and the heat exchanger (20) has a hollow chamber and comprises an inlet (203) and an outlet (204), the inlet (203) being in communication with the outlet (204) to form a flow channel, in which several protrusions (206) are provided in a staggered manner.

Description

Healing tools

related application

This application claims the priority of the Chinese patent application with application number 2021114686083 and titled therapeutic handpiece filed on December 3, 2021, which is hereby incorporated by reference in its entirety.

technical field

The present application relates to the technical field of medical devices, in particular to a therapeutic hand tool.

Background technique

With the rapid development of my country's national economy, while the material living standard is improving day by day, the phenomenon of obesity in the crowd is also increasing. We all know that obesity is very easy to cause various diseases. Therefore, in order to overcome the obesity problem, more and more medical devices for weight loss and body shaping have appeared on the market. Among them, the cryolipolysis technology is especially favored by consumers due to its non-invasive characteristics.

The traditional cryolipolysis technology refers to placing the treatment hand on the surface of the human skin to cool the local subcutaneous tissue to a lower target temperature. At the target temperature, the fat cells age in advance and undergo apoptosis successively, and are excreted to the body through metabolism. In vitro, so as to achieve the effect of weight loss. The traditional therapeutic hand tool is generally shown in Figure 1, comprising a semiconductor cooling chip 10 for refrigeration, the semiconductor cooling chip 10 has a relative cold end and a hot end, and a device is provided to help the semiconductor cooling chip 10 dissipate heat corresponding to the hot end. Corresponding to the cold end of the heat exchanger 20, a cold conduction bottom plate 30 for transferring the cold generated by the peltier refrigerating sheet 10 is provided. However, due to the direct use of commercially available general-purpose heat exchangers in this traditional treatment handpiece, the heat at the hot end of the semiconductor cooling chip cannot be dissipated quickly. According to the refrigeration principle of the semiconductor cooling chip, the high temperature at the hot end further affects the The cooling effect of the semiconductor cooling sheet 10 will eventually have a negative impact on the therapeutic effect of the therapeutic handpiece.

Contents of the invention

According to various embodiments of the present application, a therapeutic handpiece is provided.

A treatment hand, comprising a semiconductor cooling sheet, a heat exchanger, and a cold conduction bottom plate, the heat exchanger is covered on one side of the semiconductor cooling sheet, and the cold conduction bottom plate is arranged on the other side of the semiconductor cooling sheet On the side, wherein, the heat exchanger has a hollow cavity, including an inlet and an outlet, the inlet and the outlet communicate to form a flow channel, and several protrusions arranged in a staggered manner are arranged in the flow channel.

In one of the embodiments, the protrusion cooperates with the chamber wall of the heat exchanger to form a circuit.

In one embodiment, the protrusions cooperate to form a loop.

In one of the embodiments, the circuit includes at least one of a bifurcated circuit and a serpentine circuit.

In one of the embodiments, the heat exchanger is provided with a slope structure, the slope structure is facing the inlet, and the angle between the slope structure and the axis of the inlet is about 25°-70° .

In one embodiment, the projection in the axial direction of the inlet is located on the slope structure, and the area of the slope structure is about 1.44 times to 4 times the area of the inlet.

In one embodiment, the distance from the inlet to the slope structure along its axis is about 1/3-1/2 of the distance from the inlet to the chamber wall of the heat exchanger along its axis.

In one of the embodiments, the treatment handpiece further includes a heat-insulating connecting piece, and the heat exchanger is connected to the cold-conducting bottom plate through the heat-insulating connecting piece.

In one of the embodiments, the treatment handpiece further includes a connecting piece and a thermal insulation pad, the heat exchanger is connected to the cold conducting bottom plate through the connecting piece, and the connecting piece forms a connection portion with the cold conducting bottom plate, The heat insulating pad is arranged on the connection part.

In one of the embodiments, the treatment hand tool further includes a thermal insulation receiving part, which connects the heat exchanger and the cold conduction bottom plate, and the thermal insulation receiving part is provided with a connecting structure for connecting other components .

In one of the embodiments, there is more than one cold conduction bottom plate, and several of the cold conduction bottom plates are rotatably connected by a rotary connection.

In one of the embodiments, the rotary connector includes a first leaflet and a second leaflet respectively arranged on adjacent cooling bottom plates, and a positioning pin, and an arc-shaped stroke limiter is provided on the first leaflet slot, and the positioning pin passes through the travel limiting slot and is fixed with the second hinge.

In one of the embodiments, at least one heat exchanger is provided on each of the cold conduction bottom plates, and several heat exchangers communicate with each other.

The details of one or more embodiments of the invention are set forth in the accompanying drawings and the description below. Other features, objects and advantages of the invention will be apparent from the description, drawings and claims.

Description of drawings

In order to better describe and illustrate embodiments and/or examples of the inventions disclosed herein, reference may be made to one or more of the accompanying drawings. Additional details or examples used to describe the drawings should not be considered limitations on the scope of any of the disclosed inventions, the presently described embodiments and/or examples, and the best mode of these inventions currently understood.

Fig. 1 is the schematic diagram of treatment handpiece in the traditional technology;

Fig. 2 is an exploded schematic diagram of the therapeutic handpiece of the present application in some embodiments;

Fig. 3 is a schematic diagram of the heat exchanger of the therapeutic handpiece of the present application in some embodiments;

Fig. 4 is another schematic diagram of the heat exchanger of the therapeutic handpiece of the present application in some embodiments;

Fig. 5 is a schematic diagram when there are multiple cold-conducting bottom plates of the therapeutic handpiece of the present application in some embodiments;

Fig. 6 is a schematic diagram of the rotating connector of the therapeutic handpiece of the present application in some embodiments;

Fig. 7 is a schematic diagram of the configuration of the heat exchanger when there are multiple cold-conducting bottom plates of the therapeutic handpiece of the present application in some embodiments;

Among them, 10 is a semiconductor cooling plate, 20 is a heat exchanger, 21 is a thermal insulation receiving part, 23 is a thermal insulation connector, 24 is a thermal insulation pad, 201 is an upper shell, 202 is a lower shell, 203 is an inlet, and 204 is an outlet , 205 is a slope structure, 206 is a protrusion, 208 is a circuit, 2081 is a bifurcated circuit, 2082 is a serpentine circuit, 30 is a cooling bottom plate, 40 is a shell, 50 is a rotating connector, 51 is a first hinge , 52 is the second loose-leaf, 53 is a positioning pin, 511 is a travel limit groove, and 521 is a positioning hole.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial" , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the application and simplifying the description, rather than indicating or implying the referred device or Elements must have certain orientations, be constructed and operate in certain orientations, and thus should not be construed as limiting the application.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In this application, terms such as "installation", "connection", "connection" and "fixation" should be interpreted in a broad sense, for example, it can be a fixed connection or a detachable connection, unless otherwise clearly specified and limited. , or integrated; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise specified limit. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

In the present application, unless otherwise clearly specified and limited, a first feature being "on" or "under" a second feature may mean that the first and second features are in direct contact, or that the first and second features are indirect through an intermediary. touch. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions are for the purpose of illustration only and are not intended to represent the only embodiments.

Referring to FIG. 2, FIG. 2 shows an exploded schematic view of a treatment handpiece in an embodiment of the present application, the treatment handpiece includes a heat exchanger 20, a semiconductor refrigeration sheet 10, and a cold conduction bottom plate 30 stacked in sequence. The heat exchanger 20 is connected and covered on one side of the semiconductor refrigerating sheet 10, and is used to take away the heat of the semiconductor refrigerating sheet 10. The cooling effect of the semiconductor cooling chip 10 is transmitted to the outside. The heat exchanger 20 is a hollow cavity as shown in FIG. 3, including an inlet 203 and an outlet 204. The inlet 203 and the outlet 204 are connected to form a flow channel, and a plurality of staggered protrusions are arranged in the flow channel. from 206.

The treatment handpiece of the present application improves the heat exchanger 20 by setting dispersed staggered protrusions 206 in the flow channel. 206 blocking and shunting to both sides of the protrusions 206, and because several protrusions 206 are arranged in a staggered manner, the shunt flow formed by the coolant bypassing each protrusion 206 will interfere with each other, and will be separated by mutual impact. Therefore, the flow form of the cooling liquid is converted into turbulent flow, which promotes the cooling liquid to mix evenly and flow through the entire area of the flow channel at a uniform and stable flow rate. There is no flow dead zone, and local overheating of the heat exchanger 20 is avoided. Cold or localized overheating conditions.

In particular, it should be pointed out that since there are various use scenarios of the therapeutic handpiece, the flow direction of the cooling liquid in the heat exchanger 20 will change continuously, for example, between the vertical direction and the horizontal direction. If the protrusion 206 is not provided, the cooling liquid will The flow rate of the flow rate will vary greatly due to the different use scenarios of the therapeutic handpiece, resulting in a significant difference in the time it takes for the cooling liquid to pass through the flow channel of the heat exchanger 20, and too long or too short a time is not conducive to the heat exchange of the heat exchanger 20. Ultimately, there are significant differences in the heat dissipation effect of the heat exchanger 20 on the peltier refrigerating sheet 10 under different usage scenarios, which seriously affects the therapeutic effect of the therapeutic handpiece. However, the heat exchanger 20 of the therapeutic handpiece of the present application is provided with a plurality of staggered protrusions 206 in the flow channel, on the one hand, the flow distance of the cooling liquid in the heat exchanger 20 is significantly increased compared with the traditional technology, This makes even though the flow rate of the cooling liquid changes due to different use scenarios of the therapeutic handpiece, the passage time of the faster flow rate cooling liquid is not much different from the passage time of the slower flow rate cooling liquid after the flow distance is significantly increased; on the other hand , the setting of the protrusion 206 makes the cooling liquid have a suitable flow resistance during the flow process. According to the fluid characteristics, the flow resistance of the cooling liquid is positively related to the flow rate, so even if the flow rate of the cooling liquid increases due to different usage scenarios of the therapeutic handpiece, Since the flow resistance increases correspondingly, the flow rate of the cooling liquid will not be significantly different in fact, that is, the flow rate of the cooling liquid will not change significantly in the same time, and the flow rate of the cooling liquid in the heat exchanger 20 may be Control, and finally make the cooling liquid flow through the heat exchanger the same length of time. To sum up, the present application ensures a relatively stable cooling effect of the heat exchanger 20 by setting several staggered protrusions 206 in the flow channel of the heat exchanger, so that the treatment handpiece can be used in different usage scenarios. The effect tends to be consistent.

It can be understood that the protrusion 206 can be in various shapes. As shown in FIG. 3 , in some embodiments, the protrusion 206 may be a cylindrical protrusion. Or, in some embodiments as shown in FIG. 4 , the protrusion 206 cooperates with the cavity wall of the heat exchanger 20 or other protrusions 206 to form a loop 208, so that the original flow channel can be re-divided, so that The length of each new flow channel is appropriate, and the flow resistance meets the design requirements. Not only that, during the flow of the cooling liquid, it will generate a boundary layer near the wall of the flow channel, and the temperature of the boundary layer is higher than that of the liquid inside the boundary layer. But because the circuit 208 is set, the boundary layer of the cooling liquid is constantly peeled off during the flow process, and the boundary layer of the cooling liquid is constantly mixed with the liquid inside, so as to fully exert the heat exchange capacity of the cooling liquid and prevent the liquid inside the cooling liquid from being depleted. The low temperature is still maintained in contact with the heat source, resulting in insufficient heat exchange by the heat exchanger 20 .

Specifically, in the embodiment shown by the middle arrow in FIG. 4 , the circuit 208 includes a bifurcated circuit 2081 . In this part of the embodiment, protrusions 206 are further set on the loops 208, so that each loop 208 is separated by the protrusions 206 again to form several sub-loops, and even the protrusions 206 can be further set in the sub-loops to separate the sub-loops. Continue to subdivide, thus forming a bifurcated loop 2081 . In some other embodiments, as shown by the right arrow in FIG. 4 , the loop 208 may also include a serpentine loop 2082 , that is, part of the loop 208 is meandering to form a serpentine shape. By setting the bifurcated circuit 2081 and the serpentine circuit 2082, the flow distance of the cooling liquid can be significantly increased, and the flow resistance can be increased.

It can be understood that the specific positions of the inlet 203 and the outlet 204 of the heat exchanger 20 in the present application are not limited. In some embodiments, as shown in Fig. 2 and Fig. 3, the heat exchanger 20 of the present application includes an upper shell 201 and a lower shell 202. In order to facilitate the rational arrangement of the internal parts of the therapeutic handpiece of the present application, The inlet 203 is arranged vertically on the upper casing 201, and the outlet 204 is arranged horizontally. In this part of the embodiment, the distance between the inlet 203 and the cavity wall of the heat exchanger 20 facing it is too close, that is, the distance between the inlet 203 and the cavity wall of the lower housing 202 is too close. After the liquid enters the heat exchanger 20 from the inlet 203, it will immediately collide with the cavity wall, resulting in an unacceptably large pressure loss. For this reason, in some embodiments shown in FIG. 3 and FIG. 4 , a slope structure 205 is provided inside the heat exchanger 20, and the slope structure 205 faces the inlet 203. The slope structure The included angle between the axis of 205 and the inlet 203 is 25-70°. In this way, after the cooling liquid enters the heat exchanger 20 from the inlet 203 , the cooling liquid will contact the slope structure 205 and turn around, thereby reducing its pressure loss.

In some embodiments, the projection on the axial direction of the inlet 203 is located on the slope structure 205, and the area of the slope structure 205 is 1.44-4 times the area of the inlet 203. In some other embodiments, the distance from the inlet 203 to the slope structure 205 along its axis is 1/3-1/3 of the distance from the inlet 203 to the cavity wall of the heat exchanger 20 along its axis. 2. By setting the slope structure 205 configured in this way, it can ensure that the coolant enters the flow channel of the heat exchanger 20 with a reasonable flow pressure, and cooperates with the aforementioned protrusion 206, so that the coolant enters the heat exchanger 20 from the inlet 203 and The pressure loss between discharge from outlet 204 is more suitable.

In some embodiments, the slope structure 205 is concave arc-shaped. Compared with the straight line or upward convex arc slope structure 205 , this slope structure 205 can conveniently adjust the flow rate and pressure of the cooling liquid entering the heat exchanger 20 from the inlet 203 .

By setting the above configuration, when the heat exchanger 20 is a cuboid with a length of 80mm-100mm, a width of 40mm-70mm, and a height of 8mm-15mm, the length and width of the protrusion 206 provided in the heat exchanger 20 1.5mm-3mm, the distance between adjacent protrusions 206 is 3mm-5mm, the inlet 203 of the heat exchanger 20 is arranged in the height direction of the heat exchanger 20, and the distance between it and the slope structure 205 When it is 3mm-7mm, if the flow rate of the coolant is 0.5L/min-1.5L/min, the pressure loss of the heat exchanger 20 is about 2kPa-5kPa. Compared with similar products, the pressure loss of the heat exchanger 20 of the therapeutic handpiece of the present application is reduced by 10-30%; the difference between the maximum and minimum temperature on the surface of the heat exchanger 20 is reduced from 0.6-0.9°C to 0.2-0.4°C , help to improve the cooling effect of the cold end of the semiconductor refrigeration chip 10.

It should be noted that due to the direct connection between the heat exchanger 20 and the cold conduction base plate 30, this will cause the heat exchanger 20 to transfer the heat from the hot end of the semiconductor refrigeration sheet 10 to the cold conduction base plate 30, and the cold conduction base plate 30 cannot reach ideal target temperature. Moreover, the two ends of the semiconductor refrigeration sheet, that is, the cold-conducting bottom plate at the cold end and the heat exchanger at the hot end, need to be fixed by a connection mechanism so that the above-mentioned parts can have better connection strength. Therefore, a reliable connection is required while minimizing heat transfer between the hot and cold ends.

The treatment handpiece of the present application, in some embodiments, further includes a heat insulating connecting piece 23, the heat insulating connecting piece 23 has good heat insulation, and the heat exchanger 20 communicates with the cold conduction through the heat insulating connecting piece 23. The bottom plate 30 is connected. In this way, the heat exchanger 20 and the cold conduction bottom plate 30 are indirectly connected through the heat-insulating connecting piece 23, so as to block the heat of the heat exchanger 20 from being transferred to the cold conduction bottom plate 30 as much as possible, so as to prevent the treatment of the treatment handpiece described in this application. The effect is adversely affected.

It can be understood that the heat insulating connecting member 23 has various implementation forms. As shown in FIG. 2 , in some embodiments, the heat insulating connecting member 23 may be a bolt made of heat insulating material. Since the heat exchanger 20 and the cold conduction bottom plate 30 are only connected by bolts, the heat transfer is basically blocked, so that the heat of the heat exchanger 20 and the cold conduction bottom plate 30 will not be transferred to each other. In some other embodiments, the heat-insulating connecting piece 23 may also be a clamping piece made of heat-insulating material, so that the heat exchanger 20 and the cold-conducting bottom plate 30 form a clamping connection. Apparently, the heat insulating connector 23 can also be in other forms, and those skilled in the art can choose the specific form of the heat insulating connector 23 according to actual needs, and details will not be repeated here. It can be understood that the thermal insulation material described in this application can be a common material with good thermal insulation and easy processing in the market, such as high-density polyethylene (HDPE) or polyoxymethylene (POM) or nylon (PA).

In some embodiments, as shown in FIG. 2 , the therapeutic handpiece of the present application may also include a thermal insulation pad 24, and the heat exchanger 20 is connected to the cold-conducting bottom plate 30 through a conventional connecting piece, such as a metal bolt. connection, the heat insulating pad 24 is arranged at the mechanical connection part, such as the screw connection part. In this way, the heat insulating pad 24 blocks the heat transfer between the metal bolts and the cold conduction base plate 30, and also increases the resistance on the heat conduction path between the heat exchanger 20 and the cold conduction base plate 30, so as to ensure the temperature of the cold conduction base plate 30 as much as possible. relatively independent.

In some embodiments, as shown in FIG. 2 , the therapeutic handpiece of the present application may further include a heat-insulating receiving member 21 made of a heat-insulating material, and one end of the heat-insulating receiving member 21 is used to connect the heat exchanger 20 to the The cold-conducting bottom plate 30 is connected, and the other end thereof is used for connecting other components in the treatment handpiece. For example, in some embodiments as shown in FIG. 2 , one end of the heat-insulating receiving member 21 is provided with a thread, and the other end is provided with a screw hole, and the screw hole is used for threaded connection between other components and the heat-insulating receiving member 21 . The further component can be, for example, the housing 40 of the treatment handpiece. In this way, the shell 40, the heat exchanger 20 and the cold conduction bottom plate 30 are integrated, so that the various components of the therapeutic handpiece of the present application are connected together, and the stability is higher.

As shown in FIG. 5 , in some embodiments, there may be more than one cold-conducting bottom plate 30 of the therapeutic handpiece of the present application, and several cold-conducting bottom plates 30 are connected to each other through a rotating joint 50, so that each cold-conducting base plate The bottom plate 30 can rotate relative to the adjacent cooling bottom plate 30 . In this way, the treatment range of the treatment handpiece will be expanded from the plane to the three-dimensional, and the three-dimensional structure such as the thigh can be treated.

Specifically, as shown in FIG. 6 , in some embodiments, the rotating connector 50 includes a first hinge 51 , a second hinge 52 and a positioning pin 53 installed on the adjacent cooling bottom plate 30 respectively. A leaf 51 is provided with an arc-shaped stroke limiting groove 511 , and the positioning pin 53 passes through the stroke limiting groove 511 and is fixed to the second leaf 52 . It can be seen from the above description that the status of the first hinged leaf 51 and the second hinged leaf 52 are the same, and the installation positions of the first hinged leaf 51 and the second hinged leaf 52 can be exchanged without affecting the realization of the rotating function. 50 does not need to consider the corresponding installation position during installation, and the installation process is easier. Moreover, the positioning pin 53 can connect the first hinged leaf 51 and the second hinged leaf 52, and the relative rotation of the first hinged leaf 51 and the second hinged leaf 52 can be constrained by limiting the sliding range of the positioning pin 53 by the stroke limiting groove 511. angle. Specifically, in some embodiments, the second hinge 52 is provided with a positioning hole 521, and the positioning hole 521 is provided with an internal thread, and the part of the positioning pin 53 corresponding to the stroke limiting groove 511 is The polished rod, the part of the positioning pin 53 corresponding to the positioning hole 521 is provided with an external thread, and the positioning pin 53 is threadedly connected with the positioning hole 521 of the second hinge 52 .

In some embodiments, the aforementioned rotating connector 50 uses materials with good mechanical strength and good cold conductivity. For example, in some embodiments, the rotating connector 50 is made of 304 stainless steel. Since the cold conduction bottom plate 30 is mostly made of aluminum and its alloys, which have good cold conduction properties, and although the cold conduction performance of 304 stainless steel is slightly worse than that of aluminum, its strength is significantly higher than that of aluminum and its alloys. 50 can ensure the uniformity of the cooling capacity of several cooling base plates 30 while taking into account the strength, so as to realize a uniform therapeutic effect.

When there is more than one cold conduction bottom plate 30 in the present application, each cold conduction bottom plate 30 is provided with at least one heat exchanger 20 . In some embodiments, as shown in FIG. 7, several heat exchangers 20 can be connected with each other by using hoses, etc., so that the heat exchange efficiency of several heat exchangers 20 can be ensured to be close, so that each conduction The cooling capacity of the cold bottom plate 30 is close to each other, so as to achieve a uniform therapeutic effect.

To sum up, the therapeutic hand tool of the present application, by improving the heat exchanger 20, can fully take away the heat of the semiconductor cooling chip 10, thereby ensuring that the cooling bottom plate 30 has a good cooling effect, making the The treatment handpiece of the present application can achieve the target treatment effect. On this basis, the heat transfer between the heat exchanger 20 and the cold conduction bottom plate 30 is blocked by adding the heat insulating connector 23 , which further ensures that the cooling effect of the cold conduction bottom plate 30 will not be disturbed. When there are multiple cold-conducting bottom plates 30 of the treatment handpiece, by adding an independent rotating connector 50, the connection strength of adjacent cold-conducting bottom plates 30 is improved, and a certain amount of heat transfer can be carried out between adjacent cold-conducting bottom plates 30. The cold energy is transferred, so as to ensure that the cooling effects of the several cold-conducting bottom plates 30 of the treatment handpiece described in the present application are close to each other, so as to achieve a unified treatment effect.

The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

The above-mentioned embodiments only represent several implementation modes of the present application, and the description thereof is relatively specific and detailed, but it should not be construed as limiting the scope of the patent for the invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of protection of the patent application should be based on the appended claims.

Claims

A treatment hand tool, characterized in that it includes a semiconductor cooling sheet, a heat exchanger and a cold conduction bottom plate, the heat exchanger covers one side of the semiconductor cooling sheet, and the cold conduction bottom plate is arranged on the semiconductor refrigeration sheet the other side of the sheet, where,

The heat exchanger has a hollow cavity, including an inlet and an outlet. The inlet and the outlet are connected to form a flow channel, and a plurality of staggered protrusions are arranged in the flow channel.
The therapeutic handpiece according to claim 1, wherein the protrusion cooperates with the cavity wall of the heat exchanger to form a circuit.
The therapeutic handpiece according to claim 1, wherein the protrusions cooperate to form a loop.
The therapeutic handpiece according to claim 2 or 3, wherein the circuit comprises at least one of a bifurcated circuit and a serpentine circuit.
The therapeutic hand tool according to claim 1, wherein a slope structure is arranged inside the heat exchanger, the slope structure is facing the inlet, and the slope structure is sandwiched between the axis of the inlet. The angle is about 25°-70°.
The therapeutic hand tool according to claim 5, wherein the projection in the axial direction of the inlet is located on the slope structure, and the area of the slope structure is about 1.44 times to 4 times the area of the inlet .
The therapeutic handpiece according to claim 5, wherein the distance from the inlet to the ramp structure along its axis is about 100% of the distance from the inlet to the cavity wall of the heat exchanger along its axis. 1/3-1/2.
The treatment handpiece according to claim 1, characterized in that, the treatment handpiece further comprises a heat-insulating connecting piece, and the heat exchanger is connected to the cold-conducting bottom plate through the heat-insulating connecting piece.
The treatment handpiece according to claim 1, characterized in that, the treatment handpiece further comprises a connecting piece and a thermal insulation pad, the heat exchanger is connected to the cold conduction bottom plate through the connecting piece, and the connecting piece A connection portion is formed with the cold conduction bottom plate, and the heat insulation pad is arranged on the connection portion.
The treatment handpiece according to claim 1, characterized in that, the treatment handpiece further comprises a thermal insulation socket, the heat insulation socket connects the heat exchanger with the cold conduction bottom plate, and the heat insulation socket A connection structure for connecting other components is provided on it.
The therapeutic handpiece according to claim 1, characterized in that there are more than one cold conduction bottom plates, and adjacent cold conduction bottom plates are rotatably connected by a rotary connection.
The therapeutic handpiece according to claim 11, wherein the rotating connecting member comprises a first leaflet and a second leaflet respectively arranged on adjacent cold-conducting bottom plates, and positioning pins, the first The hinge is provided with an arc-shaped stroke limiting slot, and the positioning pin passes through the stroke limiting groove and is fixed to the second hinge.
The therapeutic handpiece according to claim 11, wherein each of the cold conduction bottom plates is provided with at least one heat exchanger, and several heat exchangers communicate with each other.