JPH11324996A - Pumping installation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a miniaturized and safety pumping installation free from the electric shock by mounting a triode AC switch near a channel of a resin base which receives the flow water cooling effect during the pumping operation. SOLUTION: A channel for guiding the water pressured by a pumping portion to a cock 100 is formed on a resin base 10. A triode AC switch 7 which operates and stops a pumping installation by automatically switching a motor by the gate current from a control portion 21, is mounted near the channel of the resin base which receives the flow water cooling effect during the pumping operation. A temperature near the channel of the resin base 10 is kept at about 10-15 deg.C by the water temperature during the rotation of the motor. Accordingly the triode AC switch 7 is also cooled at about 10-15 deg.C at all times, and the rise of temperature can not be found even in the self-heat generation. As the triode AC switch 7 is mounted on the resin base 20 as an insulating material, the electric shock accident can be prevented even when the triode AC switch 7 is broken and the electricity is leaked.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pump device used for pumping water in a domestic well.

[0002]

2. Description of the Related Art A pump device used for pumping water in a domestic well senses a change in a fluid flow or a pressure that changes with opening and closing of a faucet, and operates by automatically switching an electric motor by a triac. , Stop it.

[0003] By the way, the triac is
Self-heating occurs due to internal resistance during energization. In addition, since the self-heating of the triac increases in proportion to the amount of current, in order to prevent destruction due to self-heating, the triac is fixed to heat-dissipating fins that use air made of aluminum, copper, etc. Cooling is done.

However, when the output of the motor is increased to secure the pump pumping amount, the current value flowing through the triac also increases as described above, and accordingly, the self-heating amount also increases.

Therefore, in order to prevent destruction due to self-heating, as means for increasing the heat dissipation efficiency, the size of the heat dissipation fins is increased, or silicon or the like is applied for the purpose of increasing the adhesion between the triac and the heat dissipation fins. Alternatively, an attempt has been made to lower the ambient temperature of the triac storage section by making the pump cover that covers the pump larger than necessary.

On the other hand, Japanese Unexamined Utility Model Publication No. Hei 2-28587 discloses a technique of mounting a triac near a water suction pipe of a pump device. According to this technique, a triac is provided with a heat radiating means as in the prior art. The cooling effect due to the flow of water can be enjoyed during the operation of the pump without particularly performing the following.

[0007]

However, if the water absorption pipe of the pump device is a metal pipe and the triac is broken for any reason and a short circuit occurs, the leaked current flows from the metal water absorption pipe to the inside. Along the water to the faucet,
There is a risk of causing an electric shock accident.

[0008] An object of the present invention is to reduce the size of the device by not using radiating fins for cooling the triac, and to achieve a quasi-water cooling in which the cooling effect of water flow is enjoyed during operation of the pump. It is an object of the present invention to provide a pump device that ensures safety without causing a risk of electric shock.

[0009]

SUMMARY OF THE INVENTION The object of the present invention is to provide an electric motor in which a rotating shaft passes through a bracket, an impeller is fixed via a shaft sealing device, and the impeller is covered by a casing having a suction port and a discharge port. Attached to the bracket in a watertight manner, the casing is fixed to an upper part of a resin base having a water passage therein, the casing and the resin base are connected via a water pipe, and a fluid that changes with opening and closing of a faucet is provided. In a pump device that senses a change in flow or pressure and automatically switches and operates the electric motor by a triac to operate and stop, the triac is provided with a resin cooling base that enjoys a water cooling effect during pump operation. This is achieved by mounting near the water passage.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

The motor 1 is fixed to the bracket 3 by bolts (not shown), and the rotating shaft 1 penetrates the bracket 3.
The impeller 4 is fixed to a through the shaft sealing device 2.

The casing 5 is fixed to the bracket 3 with bolts (not shown) in a state where the casing 5 is sealed with water by the packing 6 so as to cover the impeller 4, and the pump unit 30 is formed.

The pump section 30 is mounted on the resin base 10 having the water passage 10a, and the casing 5 is fixed and integrated.

The resin base 10 has a pump 30
A water passage 10 a for guiding the water pressurized to the faucet 100 is formed.

Control unit 2 for instructing rotation and stop of electric motor 1
1 is housed in the resin base 10
Mounted and fixed.

The triac 7, which automatically switches the electric motor 1 by the gate current 22a from the control unit 21 to start and stop (turn on / off) the pump device, enjoys the water cooling effect during the pump operation. The resin base 10 is mounted near the water passage 10a.

The electric component case 20 and the pump section 3
0 is covered with a pump cover 25.

Next, the operation will be described.

When the faucet 100 is opened, the resin base 1 is opened.
The pressure sensor 15 fixed to 0 detects a pressure drop inside the pump, and sends a signal 15 a to the control unit 21. Signal 15a
When the control unit 21 receives the signal and sends a gate current 22a to the triac 7 to enter the electric motor 1, the electric motor 1 and the triac 7 are energized, and the electric motor 1 rotates.

With the rotation of the electric motor 1, the water pumped and pressurized by the impeller 4 via the jet unit 150 installed in the well is sent into the casing 5 from the suction port 5 a via the resin base 10. The water is then led from the discharge port 5b to the faucet 100 through the water passage 10a via the water pipe 8. When the faucet 100 is closed, the pump stops detecting the rise in pressure inside the pump.

In the pump device configured as described above, since the triac 7 is a semiconductor element, self-heating occurs due to the internal resistance (W) during the passage of current as shown in FIG. Furthermore, when the output of the electric motor 1 is increased, the current is increased, and the internal resistance (W) of the triac 7 is also increased.

However, while the motor 1 is rotating, the well water is pumped up, and the temperature near the water passage 10a of the resin base 10 is maintained at about 10 to 15 ° C. by the well water temperature. As a result, the triac 7 mounted near the water passage 10a of the resin base 10 is also constantly cooled to about 10 to 15 ° C., so that even if self-heating occurs, the temperature does not increase, and the triac 7 does not rise. Since the temperature of the nearby air does not rise, the elements of other electronic components are not destroyed by heat.

According to the present invention, the triac 7 is mounted on the resin base 10, which is an insulating material. Therefore, as in the case where the water absorption pipe of the pump device is a metal pipe,
The current leaked when the triac was broken and leaked reached the faucet through the internal water from the metal water absorption pipe,
There is no danger of electric shock, and it is possible to obtain a pump device that enjoys the cooling effect by passing water during the operation of the pump and that has no danger of electric shock when sub-cooling is used and that ensures safety.

By making the base 10 made of resin, it is possible to achieve light weight and rust prevention.

Further, since the triac 7 is mounted on the wetted parts, there is no need to form a radiating fin in the control unit 21.
Can be miniaturized. That is, the size of the pump device itself can be reduced.

Although the above embodiment has exemplified the case where the present invention is applied to a pump device having a jet part, the same applies to the case where the present invention is applied to a pump without a jet part, a so-called shallow well pump. The effect is obtained.

[0027]

As described above, according to the present invention, a triac for automatically switching an electric motor by sensing a change in a fluid flow or a pressure that changes with opening and closing of a faucet, and enjoys a water-flow cooling effect during pump operation. According to the present invention, the apparatus is miniaturized by not using a radiating fin for cooling the triac, and is mounted near the water passage of the resin base. It is possible to obtain a pump device that enjoys a cooling effect and has no risk of electric shock even in the case of quasi-water cooling and ensures safety.

[Brief description of the drawings]

FIG. 1 is a partial longitudinal sectional view showing an internal structure of a pump device.

FIG. 2 is a plan view of FIG.

FIG. 3 is a perspective view showing a pumping / water supply system of the pump device.

FIG. 4 is a diagram showing a positional relationship between a water passage 10a of a resin base 10 and a triac 7;

FIG. 5 is a circuit diagram showing an electric system of the pump device.

FIG. 6 is a diagram showing a current distribution characteristic of a triac.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Electric motor, 1a ... Rotating shaft, 2 ... Shaft sealing device, 3 ... Bracket, 4 ... Impeller, 5 ... Casing, 5a ... Suction port, 5
b: outlet, 7: triac, 8: water pipe, 10: resin base, 10a: water passage, 100: faucet.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI H02P 7/622 301 H02P 7/622 301Z

Claims (1)

[Claims] 1. A rotating shaft of an electric motor penetrates a bracket,
An impeller is fixed via a shaft sealing device, the impeller is covered with a casing having a suction port and a discharge port, and mounted on the bracket in a watertight manner, and the casing is fixed to an upper portion of a resin base having a water passage therein. The casing and the resin base are connected to each other through a water pipe, and the motor is automatically switched by a triac to sense a change in fluid flow or pressure that changes with opening and closing of the faucet. A pump device for stopping the pump, wherein the triac is mounted near a water passage of the resin base, which enjoys a water-flow cooling effect during operation of the pump.