Abstract:
An ultrasound diagnostic apparatus includes an apparatus for heating a coupling medium, wherein the apparatus includes an external heat conductive unit, including a base for positioning a container storing the coupling medium, and an internal heat sink unit for absorbing heat from the heat generating unit of the ultrasound diagnostic apparatus. The external heat conductive unit and the internal heat sink unit are configured as separate assembly structures such that, in the state of assembly, the heat of the heat generating unit is transferred to the container through them.

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application claims the benefit of Chinese Patent Application No. 200910206776.8 filed Dec. 30, 2009, which is hereby incorporated by reference in its entirety. 
     BACKGROUND OF THE INVENTION 
     This invention relates to an ultrasound imaging apparatus, in particular relates to a method and apparatus for heating a coupling medium and an ultrasound diagnostic apparatus including the apparatus for heating a coupling medium. 
     Ultrasound diagnostic professionals use a kind of substance called a “coupling medium” to enhance transmission of the ultrasound waves between transducer and examined patient. This medium is usually an aqueous gel stored in a container and is applied liberally to the skin area of the examined patient where the transducer will be in contact. For the patient to feel comfortable, the temperature of the gel should be close to the body temperature. Thus, heating apparatus can be used to heat the gel in the container. 
     U.S. Pat. No. 6,575,906 discloses a rapid-heating ultrasound gel warmer. An ultrasonic imaging system carries a holder that holds a container for storing a gel. The container includes a metallic cap including a heat exchanger in good thermal contact with the gel of the container, and the holder includes a heating element in good thermal contact with the metallic cap. When the ultrasound system is powered on, the power is applied to the heating element, thereby heating the gel in the container. 
     However, the prior heating methods consume certain power, although this is not a problem for cart type ultrasound imaging system because it is powered by AC power. But for portable ultrasound medical diagnostic imaging apparatus powered by batteries, the impact by heating the gel on energy consumption becomes remarkable. 
     It would be desirable then to provide a method and apparatus for heating a coupling medium that energy consumption required for heating can be saved and an ultrasound diagnostic apparatus including the apparatus for heating a coupling medium. 
     BRIEF DESCRIPTION OF THE INVENTION 
     It is an object of the present invention to provide a method and apparatus for heating a coupling medium and an ultrasound diagnostic apparatus which can notably save energy consumption required for heating. 
     In accordance with another aspect of the present invention, the apparatus for heating a coupling medium includes an external heat conductive unit, including a base for placing a container storing the coupling medium, and an internal heat sink unit for absorbing heat from the heat generating unit of the ultrasound diagnostic apparatus, wherein the external heat conductive unit and the internal heat sink unit are configured as separate assembly structures and, in the state of assembly, the heat of the heat generating unit is transferred to the container through them. 
     According to yet another aspect of the present invention, the ultrasound diagnostic apparatus includes an apparatus for heating a coupling medium including an external heat conductive unit, including a base for placing a container storing the coupling medium, and an internal heat sink unit for absorbing heat from the heat generating unit of the ultrasound diagnostic apparatus, wherein the external heat conductive unit and the internal heat sink unit are configured as separate assembly structures and, in the state of assembly, the heat of the heat generating unit is transferred to the container through them. 
     According to the preferred embodiments of this invention, since the heat generated during the operating process of the ultrasound diagnostic apparatus is utilized for heating the coupling medium, no extra energy can be consumed. On the other hand, the heat generated by the ultrasound diagnostic apparatus can be transferred to the coupling medium, the heat dissipation need of the ultrasound diagnostic apparatus can be satisfied. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Reference is made to the following description of best embodiments in conjunction with the drawings, so as to a better understanding of the disclosure of the present invention. 
         FIGS. 1 and 2  are schematic views of a gel heating apparatus according to a preferred embodiment of the present invention, wherein  FIG. 1  is an exploded view and  FIG. 2  is a view of the assembly apparatus. 
         FIG. 3  is a schematic view of the ultrasound diagnostic apparatus according to another preferred embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Reference is made to some specific embodiments of the present invention in detail below which include the modes regarded by the inventor as best embodiments for carrying out the invention. These particular embodiments will be illustrated in the drawings. When the present invention is described in combination with the particular embodiments, it is understood that it is not intended to limit the present invention to the described embodiments. Instead, it is intended to cover the replacements, modifications and variations that can be included within the spirit and scope of the invention as defined in the claims. 
     It should be noted in the following descriptions that the connection between two units does not mean that it must be direct. Unless specially explained, the term also covers the cases of the indirect connections through other units. For the word “contact”, it includes both the cases of the direct contact between the respective portions of two units and the cases of the indirect contact formed through other units, unless otherwise explained. 
       FIGS. 1 and 2  are schematic views of an apparatus for heating a coupling medium according to a preferred embodiment of the present invention. A gel heating apparatus  100  as shown in  FIGS. 1 and 2  includes a case  101 , a base  102 , a first heat conductive pipe  103 , a heat conductor  104 , a second heat conductive pipe  105  and a fan  106 . 
     As shown in the figures, the case  101  encloses the base  102  and the first heat conductive  103  to prevent operators from careless burns. The base  102  includes an inside recess region  102   a  for holding the container storing the gel (e.g. in the form of a bottle, not shown). The side of the base  102  is configured with at least one set of fins  102   b  for performing sufficient heat exchange with the heat conductor  104 . One end of the first heat conductive pipe  103  includes an arc segment  103   a , which at least partially encircles the bottom of the inside recess region  102   a . When the base  102  is attached to the native machine of the ultrasound diagnostic apparatus, the other end of the first heat conductive pipe  103  may be in contact with the outside surface of the second heat conductive pipe  105  (for example, the other end of the first heat conductive pipe  103  is superimposed on the second heat conductive pipe  105 ) to transmit heat into the base  102 . Especially, air in the first heat conductive pipe  103  may be pumped out and a certain amount of mediums may be injected, and then the pipe housing is sealed. In this way, the heat from the second heat conductive pipe  103  is inputted from the contact region to evaporate the mediums by absorbing heat into vapor, and the vapor flows to the arc segment  103   a  of the first heat conductive pipe  103 , then condenses to release vapourization latent heat, and then flows back to the contact region. By such circulation, continuous heating of the container can be achieved. When used, the container can be located in the inside recess region  102   a  at an inverted position so as to make the gel near the container opening closer to the arc segment  103   a  of the first heat conductive pipe  103 , thereby increasing the heating efficiency. 
     According to the preferred embodiment of this invention, the case  101 , the base  102  and the first heat conductive pipe  103  are located outside the native machine of the ultrasound diagnostic apparatus (not shown), while the heat conductor  104 , the second heat conductive pipe  105  and the fan  106  are mounted inside the ultrasound diagnostic apparatus. The specific positions of the heat conductor  104 , the second heat conductive pipe  105  and the fan  106  may be determined dependent on the positions of the heat source or heat generating unit within the ultrasound diagnostic apparatus. For example, for a portable ultrasound medical imaging apparatus, the heat source thereof includes the elements with great heat generation like the processor chip, the image display chip and the display screen and so on. Thus, as shown in  FIGS. 1 and 2 , the heat conductor  104  is mounted adjacent to an electric unit  202  generating heat (e.g. a printed circuit board), preferably in contact with the elements with great heat generation like a chip on the electric unit  202 . In this way, the heat generated when the elements are on operation can be highly efficiently transferred to the heat conductor  104 . As illustrated by  FIG. 2 , a protrusion portion  104   a  is arranged at a position where the surface of the heat conductor  104  corresponds to the elements with great heat generation, to form the contact with the heat source. It is worth noting that the heat conductor  104  may be either in contact with the heat source or in a certain distance therefrom. These variations all fall within the protection scope of the present invention. The second heat conductive pipe  105  may be directly in contact with the heat source, or near the heat source. Preferably, as shown in  FIG. 2 , the second heat conductive pipe  105  is in contact with the protrusion portion  104   a  on the heat conductor  104 . In another aspect, as mentioned above, when the base  102  is attached to the native machine of the ultrasound diagnostic apparatus, the second heat conductive pipe  105  and the first heat conductive pipe  103  form a face-contact to lead heat out of the ultrasound diagnostic apparatus so as to provide a high heat conducting efficiency. For the second heat conductive pipe  105 , the same working principle can be utilized as the first heat conductive pipe  103 . 
     With reference to  FIGS. 1 and 2 , the side of the heat conductor  104  is configured with an upper portion fin set  104   b  and a lower portion fin set (not drawn). The upper portion fin set  104   b  mates with the fin set  102   b  of the base  102  and they are in rather close contact. That is, one fin of one of the fin sets is between the two fins of the other fin set. Therefore, the heat exchange area between the base  102  and the heat conductor  104  are remarkably increased so that the heating effect is enhanced. Additionally, preferably, the side of the housing of the ultrasound diagnostic apparatus is provided with an opening, and the base  102 , through the mating of the fin set  102   b  with the upper portion fin set  104   b , is mounted at the opening in a detachable way. In this way, the base  102  can be detached from the host machine of the apparatus when there is no need to heat the gel, so that the portability and normal work of the apparatus are ensured. 
     It is worth noting that the heat transfer between the base  102  and the heat conductor  104  may be performed by other means. For example, the sides of the two are both flat so as to form the face-contact. 
     Under the high temperature ambient (e.g. 40° C.), the gel possibly requires no heating, i.e. can be directly applied. At this time, for solving the heat dissipation problem of the ultrasound diagnostic apparatus, the fan  106  can be mounted internally which transfers the heat of the heat source to the outside of the ultrasound diagnostic apparatus by air circulation. For instance, as shown in  FIG. 1 , the fan  106  is located at the bottom of the heat conductor  104 , and the air flow produced thereby blows the heat generated by the heat source to the opening of the housing. Since there are spaces between the lower portion fins of the base  102  and which are not in contact with the fin set  102   b , the air flow can still pass the lower portion fins and the opening of the housing so as to carry heat to the outside of the ultrasound diagnostic apparatus. 
       FIG. 3  is a schematic view of the ultrasound diagnostic apparatus according to one preferred embodiment of the present invention. An ultrasound diagnostic apparatus  200  is added with the gel heating apparatus  100  as shown in  FIGS. 1 and 2  to the host machine thereof. The host machine herein refers to, e.g. units performing the ultrasound diagnostic function. Spatially, they are usually mounted inside a housing, e.g. a housing represented by reference number  201  in  FIG. 3 . As shown in  FIG. 3 , the base  102  and the first heat conductive pipe  103  are mounted in the case  101  and separate from the native machine  201  of the ultrasound diagnostic apparatus, while the other components of the gel heating apparatus  100  (such as the heat conductor  104 , the second heat conductive pipe  105  and the fan  106 ) are located in the native machine  201  of the ultrasound diagnostic apparatus. If the gel in a container  300  requires heating, the base  102  can be plugged into the opening at the side of the native machine  201  of the ultrasound diagnostic apparatus and the container  300  is placed in the inside recess region  102   a  of the base  102 . 
     Though the aforesaid invention is described in detail for the purpose of clear understanding, it is obvious that some variations and modifications may be made within the scope sought for protection by the appended claims. Thus, the embodiments are just illustrative, not limitative. Moreover, this invention is not limited by the given details, but can be modified with the equivalents within the scope of the appended claims.