Motor-driven four-way reversing valve

Abstract

The invention provides a motor-driven energy-saving four-way reversing valve with a compact structure and lower production cost. The motor-driven energy-saving four-way reversing valve comprises a synchronous motor and a cam piece driven by the synchronous motor; a first location switch and a second location switch are arranged close to the cam piece; the cam piece is provided with a cam which makes the on-off state of the first location switch always opposite to that of the second location switch and making the on-off states of the first location switch and the second location switch simultaneously changed once when the cam piece rotates 1 / 4 cycle; a contact at one end of the first location switch is electrically connected with a heating supply line; a contact at one end of the second location switch is electrically connected with a refrigerating supply line; a contact at the other end of the first location switch and a contact at the other end of the second location switch are electrically connected with one electrode of the synchronous motor; and the other electrode of the synchronous motor is electrically connected with a common line. The motor-driven energy-saving four-way reversing valve has the advantages of short power-on time, high action reliability, simple structure, simplified assembling process, low cost and the like.

Description

technical field [0001] The invention relates to a four-way reversing valve for heating and cooling air conditioners. Background technique [0002] Such as figure 1 , figure 2 As shown, the heating and cooling air conditioner uses a traditional electromagnetic four-way reversing valve to change the flow direction of the refrigerant during the mutual conversion of cooling and heating. The shortcomings of the traditional electromagnetic four-way reversing valve are: [0003] 1) After the conversion from cooling to heating is completed, the electromagnetic coil is still energized, which does not save energy, and at the same time, it is easy to burn out due to the long power-on time; [0004] 2) The electromagnetic pilot valve is used to control the pressure difference on both sides of the spool valve to achieve reversing. There are many intermediate links, and the spool valve is easy to get stuck without reversing; [0005] 3) In addition to the electromagnetic coil, the nu...

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Problems solved by technology

[0005] 3) In addition to the electromagnetic coil, the number of other parts reaches more than 35, with many parts and complex structure;

[0006] 4) The assembly process is complicated, especially there are more than 16 welding parts, the requirements for welding equipment are high, and the quality is difficult to control;

[0007] 5) High material and processing costs

However, this patent document only discloses the structure of a four-way valve driven by a servo motor, but does not disclose the structure of a four-way valve driven by a motor with other characteristics

According to the structure of the four-way valve defined in the technical solution, those skilled in the art can also directly judge that the technical solution can only be driven by a servo motor. If a motor with other characteristics is used such as a synchronous motor to drive, There will be problems that the action timing, time and rotation angle of the reversing rotor cannot be controlled.

In addition, those skilled in the art also know that the driving and control of the servo motor requires a relatively complicated control circuit, which makes such a four-way valve not actually cost-effective

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