Electric Air Pump for Inflatable Body
An electric air pump for pumping air into an inflatable body includes a housing having an air inlet and an air outlet, an impeller disposed in the housing, a motor configured to drive the impeller, an air passage connecting the air inlet and the air outlet, a first chamber receiving the motor and including a ventilation inlet and ventilation outlet, and a heat dissipation impeller configured to be driven by the motor so that air flows into the first chamber through the ventilation inlet and flows out of the first chamber through the ventilation outlet for heat dissipation of the motor.
This application claims priority of China Patent Application No. 201410600331.9, filed on Oct. 31, 2014, the entirety of which is incorporated by reference herein.
BACKGROUND OF THE INVENTION1. Field of the Invention
The invention relates to an electric air pump, and more particularly to an electric air pump for pumping air into inflatable bodies and provided with heat dissipation function.
2. Description of the Related Art
Electric air pumps are used for pumping air into inflatable bodies such as inflatable boats, inflatable beds, inflatable parks and inflatable arches. Referring to
To address the shortcomings discussed, the invention provides an electric air pump capable of operating stably for a long period and having a long service life.
The invention provides an electric air pump. The electric air pump for pumping air into at least one inflatable body in accordance with an exemplary embodiment of the invention includes a housing having an air inlet and an air outlet, an impeller disposed in the housing, a motor configured to drive the impeller, an air passage connecting the air inlet and the air outlet, a first chamber receiving the motor and including a ventilation inlet and ventilation outlet, and a heat dissipation impeller configured to be driven by the motor so that air flows into the first chamber through the ventilation inlet and flows out of the first chamber through the ventilation outlet for heat dissipation of the motor.
In another exemplary embodiment, the ventilation inlet and the ventilation outlet are disposed on two sides of the first chamber.
In yet another exemplary embodiment, the electric air pump further includes a switching mechanism and a trigger switch, wherein the switching mechanism is disposed in the housing to pump air into the air passage, discharging air from the air passage, or closing the air passage, and the trigger switch is connected to the switching mechanism for starting or shutting down the motor.
In another exemplary embodiment, the electric air pump further includes a second chamber and a spacing plate. The switching mechanism includes a knob disposed on a surface of the housing, a transmission rod configured to be rotated with the knob, and a switching element disposed in the second chamber and configured to be driven by the transmission rod to change air flow direction. The second chamber is disposed in the housing and includes a right partition plate and a left partition plate. The right partition plate partitions the switching element and the impeller and has an upper through hole and a lower through hole. The left partition plate is disposed near the air outlet and has a left through hole connected to the air outlet. The spacing plate is disposed between the motor and the impeller to form an upper space connected to the upper through hole and a lower space connected to the lower through hole.
In yet another exemplary embodiment, the electric air pump further includes a rib disposed on the transmission rod, a transmission shaft movably extending through a through hole formed on the left partition plate, and a channel switching button fixed to the transmission shaft and including a transmission portion connected to the rib disposed on the transmission rod. The switching element includes a channel inclined between the left partition plate and the right partition plate, and a sliding plate disposed on an inner wall of the left partition plate and adjacent to the channel. A width of the channel is less than a distance between the upper through hole and the lower through hole and less than a height of the left through hole. The sliding plate is larger than the left through hole. The transmission rod is configured to drive the channel switching button to rotate about the transmission shaft through the rib and the transmission portion so as to rotate the switching element at a predetermined angle to connect the channel to the left through hole and the lower through hole.
In another exemplary embodiment, the transmission rod includes a protrusion configured to contact the trigger switch disposed near the protrusion.
In yet another exemplary embodiment, the electric air pump further includes a valve set disposed between the left through hole and the air outlet, a pressing plate disposed on the air outlet and covered by the valve set, a push rod disposed on a center of the pressing plate and extending towards the transmission rod, an elastic element disposed around the push rod to push the pressing plate to cover the air outlet, and two bosses disposed on the transmission rod, wherein the bosses push the push rod to open or close the air inlet through rotation of the transmission rod.
In another exemplary embodiment, the housing is hermetically connected to the inflatable body, and the electric air pump further includes a manual pressure relief valve disposed on an outer wall of the electric air pump and configured to discharge air from the inflatable body.
In yet another exemplary embodiment, the manual pressure relief valve includes a body fixed to the outer surface of the electric air pump. The body includes a vent, a valve deck plate covering the vent, a vertical rod disposed on a center of the valve deck plate and extending through the vent to protrude from the body, and a returning elastic element disposed around the vertical rod to push the valve deck plate to cover the vent.
In another exemplary embodiment, the electric air pump further includes a manual exhausting handle, a power switch configured to start the motor, a venting hole formed on the manual exhausting handle and connected to the inflatable body through a hose, a regulating plate configured to cover the venting hole and including a pressing rod which extends through the manual exhausting handle to protrude from an outer surface of the manual exhausting handle, and a returning elastic element disposed around the pressing rod to push the regulating plate to cover the venting hole.
In yet another exemplary embodiment, the first chamber and the air passage are separated.
In another exemplary embodiment, the first chamber is connected to the air passage.
In yet another exemplary embodiment, the ventilation outlet and the air outlet are separated.
The electric air pump of the invention can dissipate heat generated by the motor, whereby the motor can operate for a long time without any unstable, aged or safety problems. The electric air pump of the invention controls air inflation and discharge to depressurize the inflatable body manually when the inflatable body is over-pressurized and power inflate air into the inflatable body when the inflatable body is under-pressurized.
A detailed description is given in the following embodiments with reference to the accompanying drawings.
The invention can be more fully understood by reading the subsequent detailed description and examples with references made to the accompanying drawings, wherein:
The following description is of the best-contemplated mode of carrying out the invention. This description is made for the purpose of illustrating the general principles of the invention and should not be taken in a limiting sense. The scope of the invention is best determined by reference to the appended claims.
The First EmbodimentReferring to
In this embodiment, as long as the electric air pump operates, the motors 2 is continuously cooled by air flow even when air pressure in the inflatable body is equal to or higher than air pressure generated by the electric air pump, and air stops entering the inflatable body. The motor 2 is prevented from overheating so that reliability and service life of the electric air pump are increased.
The Second EmbodimentReferring to
Referring to
Referring to
A switching mechanism 6 is disposed in the air passage 4 to manually control air inflation, air discharge or closing of the air passage 4. The switching mechanism 6 is connected to a trigger switch 21 which is configured to start or shut down the motor 2. The switching mechanism 6 includes a knob 61 disposed on an outer surface of the housing 1, a transmission rod 62 rotated simultaneously with the knob 61 and a switching element 63 driven by the transmission rod 62 to control air flow directions. The knob 61 has three modes which are air inflation, air discharge and stop (as shown in
When the knob 61 is rotated to the air inflation mode, the protrusion 622 on the transmission rod 62 contacts the trigger 21 to start the motor 2. At the same time, the bosses 623 on the transmission rod 62 push the push rod 72 to open the air outlet 12, and the transmission rod 62 rotates the channel switching button 634 and the switching element 63 to a predetermined angular displacement downwards through the rib 621, whereby air flow which enters the air passage 4 from the air inlet 11 flows through the upper through hole 651, the upper space 671, the lower space 672, the lower through hole 652, the channel 631, the left through hole 661, and the air outlet 12 into the inflatable body A. When the knob 61 is rotated to the air discharge mode, the protrusion 622 on the transmission rod 62 contacts the trigger switch 21 to start the motor 2. At the same time, the bosses 623 on the transmission rod 62 push the push rod 72 to open the air outlet 12, and the transmission rod 62 rotates the channel switching button 634 and the switching element 63 to a predetermined angular displacement upwards through the rib 621, whereby air in the inflatable body A flows through the left through hole 661, the channel 631, the upper space 671, the lower space 672 and the lower through hole 652 and discharges through the air inlet 11. When the knob 61 is rotated to the stop mode, the protrusion 622 is detached from the trigger switch 21 to shut down the motor 2, and the bosses 623 have no contact with the push rod 72, whereby the pressing plate 71 covers the air outlet 12 to close the air outlet 12.
A manual pressure relief valve 8 is disposed on the housing 1 to regulate the pressure in the inflatable body.
Referring to
In the above embodiments, gas sealing between elements is necessary, and conventional means for gas sealing may be used. Thus, the description of means for gas sealing is omitted.
The first chamber 5 and the air passage 4 are separated in the above embodiments. However, it is understood that a connection between the first chamber 5 and the air passage 4 is feasible when heat generated by the electric air pump is not too much and does not affect the use of the inflatable body A. The first chamber 5 and the air passage 4 can be connected in different manners. For example, the first chamber 5 and the air passage 4 have no separating element provided therebetween. For another example, the first chamber 5 and the air passage 4 has a separating element provided therebetween. However, the separating element has a through hole to connect the first chamber 5 and the air passage 4.
While the invention has been described by way of example and in terms of preferred embodiment, it is to be understood that the invention is not limited thereto. To the contrary, it is intended to cover various modifications and similar arrangements (as would be apparent to those skilled in the art). Therefore, the scope of the appended claims should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements.
Claims
1. An electric air pump for pumping air into an inflatable body, comprising:
- a housing comprising an air inlet and an air outlet;
- an impeller disposed in the housing;
- a motor configured to drive the impeller;
- an air passage connecting the air inlet and the air outlet;
- a first chamber receiving the motor and comprising a ventilation inlet and a ventilation outlet; and
- a heat dissipation impeller configured to be driven by the motor so that air flows into the first chamber through the ventilation inlet and flows out of the first chamber through the ventilation outlet for heat dissipation of the motor.
2. The electric air pump as claimed in claim 1, wherein the ventilation inlet and the ventilation outlet are disposed on two sides of the first chamber.
3. The electric air pump as claimed in claim 2, further comprising a switching mechanism and a trigger switch, wherein the switching mechanism is disposed in the housing to pump air into the air passage, discharging air from the air passage, or closing the air passage, and the trigger switch is connected to the switching mechanism for starting or shutting down the motor.
4. The electric air pump as claimed in claim 3, further comprising a second chamber and a spacing plate, wherein the switching mechanism comprises a knob disposed on a surface of the housing, a transmission rod configured to be rotated with the knob, and a switching element disposed in the second chamber and configured to be driven by the transmission rod to change air flow direction, the second chamber is disposed in the housing and comprises a right partition plate and a left partition plate, the right partition plate partitions the switching element and the impeller and has an upper through hole and a lower through hole, the left partition plate is disposed near the air outlet and has a left through hole connected to the air outlet, and the spacing plate is disposed between the motor and the impeller to form an upper space connected to the upper through hole and a lower space connected to the lower through hole.
5. The electric air pump as claimed in claim 4, further comprising a rib disposed on the transmission rod, a transmission shaft movably extending through a through hole formed on the left partition plate, and a channel switching button fixed to the transmission shaft and comprising a transmission portion connected to the rib disposed on the transmission rod, wherein the switching element comprises a channel inclined between the left partition plate and the right partition plate, and a sliding plate disposed on an inner wall of the left partition plate and adjacent to the channel, a width of the channel is less than a distance between the upper through hole and the lower through hole and less than a height of the left through hole, the sliding plate is larger than the left through hole, the transmission rod is configured to drive the channel switching button to rotate about the transmission shaft through the rib and the transmission portion so as to rotate the switching element at a predetermined angle to connect the channel to the left through hole and the lower through hole.
6. The electric air pump as claimed in claim 5, wherein the transmission rod comprises a protrusion configured to contact the trigger switch disposed near the protrusion.
7. The electric air pump as claimed in claim 5 further comprising a valve set disposed between the left through hole and the air outlet, a pressing plate disposed on the air outlet and covered by the valve set, a push rod disposed on a center of the pressing plate and extending towards the transmission rod, an elastic element disposed around the push rod to push the pressing plate to cover the air outlet, and two bosses disposed on the transmission rod, wherein the bosses push the push rod to open or close the air inlet through rotation of the transmission rod.
8. The electric air pump as claimed in claim 1, wherein the housing is hermetically connected to the inflatable body, and the electric air pump further comprises a manual pressure relief valve disposed on an outer wall of the electric air pump and configured to discharge air from the inflatable body.
9. The electric air pump as claimed in claim 8, wherein the manual pressure relief valve comprises a body fixed to the outer surface of the electric air pump, and the body comprises a vent, a valve deck plate covering the vent, a vertical rod disposed on a center of the valve deck plate and extending through the vent to protrude from the body, and a returning elastic element disposed around the vertical rod to push the valve deck plate to cover the vent.
10. The electric air pump as claimed in claim 1, further comprising a manual exhausting handle, a power switch configured to start the motor, a venting hole formed on the manual exhausting handle and connected to the inflatable body through a hose, a regulating plate configured to cover the venting hole and comprising a pressing rod which extends through the manual exhausting handle to protrude from an outer surface of the manual exhausting handle, and a returning elastic element disposed around the pressing rod to push the regulating plate to cover the venting hole.
11. The electric air pump as claimed in claim 1, wherein the first chamber and the air passage are separated.
12. The electric air pump as claimed in claim 1, wherein the first chamber is connected to the air passage.
13. The electric air pump as claimed in claim 1, wherein the ventilation outlet and the air outlet are separated.
Type: Application
Filed: Oct 29, 2015
Publication Date: May 5, 2016
Inventors: Cheng-Chung Wang (Taipei City), Chien-Hua Wang (Taipei City)
Application Number: 14/927,450