Liquid pump

Abstract

This invnetoin provides a fluid pump which has a thin shape preferably applicable to a cooling device for electronic equipment such as a notebook personal computer progressively miniaturized and thinned, and which is excellent in air discharge amount. The fluid pump 1 has a diaphragm 2 and a case body 8 for accommodating the diaphragm 2, wherein the diaphragm 2 is vibratably accommodated inside the case body 8, a pump chamber 3 disposed on one surface 2a of the diaphragm 2 is formed in a part of the case body 8, an intake part 4 and a discharge part 5 communicating with the pump chamber 3 are formed in a position opposed to the diaphragm 2 in the pump chamber 3, the intake part 4 and the discharge part 5 are provided with a check valve type intake valve 6 and a check valve type discharge valve 7 respectively, and the discharge part 5 is arranged closer to the diaphragm 2 than the intake part 4.

Description

technical field [0001] The present invention relates to a fluid pump with a diaphragm-driven structure suitable for cooling small-sized and thin electronic devices such as notebook computers. Background technique [0002] Conventionally, various vibrating membrane vibrator pumps have been proposed in which a piezoelectric element such as PZT is bonded to a thin plate such as a metal plate and integrated to form a vibrating membrane as a vibrator for the purpose of reducing size and weight. Image 6 It is a diagram showing a configuration example of such a vibrating membrane vibrator type fluid pump (see, for example, Patent Document 1). [0003] exist Image 6 In the shown fluid pump A, a plate-shaped piezoelectric vibrator 101 such as PZT is built inside an upper part of a hollow box-shaped case 100, and the hollow part is divided into upper and lower parts. Image 6 In this piezoelectric vibrator 101, a space portion 102 is formed on the lower side, and a pump chamber 103 i...

AI Technical Summary

Problems solved by technology

[0008] For example, when it is desired to make the overall thickness of the fluid pump A thinner, although the lower part of the case 100 located below the piezoelectric vibrator 101 can be made thinner, there is a problem that the upper part of the case 100 cannot be extremely thinned.

For example, although the pump chamber 103 can be thinned, the pump cannot be thinned beyond their height or thickness due to the presence of the check valves 113, 115 and the suction passage 107 and discharge passage 108 on its upper side.

That is, substantially due to the entire thickness, there must be part of the thickness of the piezoelectric vibrator 101, the part of the housing that holds the piezoelectric vibrator 101, the pump chamber 103, the check valves 113, 115, and the part of the thickness of the suction nozzle 105 or the discharge nozzle. 106, the thickness of the partial thickness is added, so there is a problem that the miniaturization of the case cannot be realized thinner than this thickness

[0009] In particular, since the check valves 113, 115, which are approximately umbrella-shaped in cross section, are respectively installed on the partition walls 109, 110 up and down, the heads 113a, 115a of the check valves 113, 115 are arranged on the partition walls 109, 110 respectively. One side of the pump chamber 103 and the opposite side thereof, and the partition walls 109, 110 are arranged at equal distances from the piezoelectric vibrator 101, so the thickness of the housing 100 must be formed to be equivalent to the thickness of the partition walls 109, 110 and the heads 113a, 115a thickness, which has become the biggest obstacle to miniaturization

[0010] Furthermore, if the pump chamber 103 is made thinner, there is also a problem that the discharge volume of the fluid pump A is extremely low.

[0011] Therefore, it is desirable to make the fluid pump as thin as possible when it is desired to effectively use it as a cooling device for notebook computers and portable information devices that are becoming smaller and lighter in weight. Image 6 The conventional fluid pump shown above has the problem that it cannot meet the requirements of these applications.

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