Matched valve element for automobile air conditioner

Abstract

The utility model discloses a matching valve core for an automobile air conditioner, which comprises a valve body, a diaphragm, a valve core rod, a reset spring and a valve ball, the bottom of the diaphragm is connected with the valve core rod, the bottom of the valve ball is connected with the reset spring, the bottom end of the valve core rod is connected with a piston body, the piston body is divided into an upper part and a lower part, and the upper part is connected with the lower part. The upper portion of the piston body blocks a channel opening entering the evaporator, and the lower portion of the piston body annularly extends to be tightly attached to the outer wall of the channel. The radial size of the upper portion of the piston body is smaller than the diameter of the inner wall of the channel opening. The radial size of the upper portion needs to be slightly smaller than the diameter of the inner wall of the channel opening, the lower portion of the upper portion is sealed into the channel opening of the evaporator to serve as a first seal, the periphery of the first seal is provided with the enclosing body independent of the valve ball and the piston body, and the bottom and the top of the enclosing body are both made of flexible materials. The valve ball is buffered when the reset spring moves upwards along with the piston body and collides with the enclosure body, the caliber of the bottom of the enclosure body is matched with the valve ball, and second sealing is formed when the valve ball is connected with the bottom of the enclosure body.

Description

TECHNICAL FIELD

[0001] The utility model relates to automobile air conditioning spare parts technical field, concretely is a kind of automobile air conditioning matched valve core. BACKGROUND

[0002] Valve core for automobile air conditioning is an important component in automobile air conditioning system, mainly used to control the flow and pressure of refrigerant. Common valve core types in automobile air conditioning system include expansion valve core, charging valve core and bypass solenoid valve core, etc. As for the current valve core, the integral structure of connecting part and sealing part is usually adopted, and the valve core of this integral structure belongs to rigid structure, which requires high machining precision and assembly precision. However, the valve core of rigid structure will impact the sealing element when subjected to pressure during use, and long-term use will cause wear and affect the sealing effect.

[0003] To solve the above problems, the present case arises. INVENTION CONTENTS

[0004] (I) technical problem solved

[0005] In view of the deficiencies of the prior art, the utility model provides a kind of matched valve core for automobile air conditioning, solve the problem raised in the above background technology.

[0006] (II) technical scheme

[0007] To achieve the above purpose, the utility model is realized by the following technical scheme: a kind of matched valve core for automobile air conditioning, including valve body, diaphragm, valve core rod, reset spring and valve ball, the bottom of the diaphragm is linked with valve core rod, the bottom of the valve ball is connected with reset spring, the bottom end of the valve core rod is connected with piston body, the piston body is divided into upper part and lower part, the upper part blocks the channel mouth into evaporator, the lower part extends around and closely adheres to the outer wall of channel, the radial dimension of the upper part of the piston body is less than the diameter of the inner wall of channel mouth, and the lower part of the piston body is the first seal, and the lower end of the piston body is connected with the valve ball.

[0008] Preferably, the material of the piston body is flexible pad or silica gel material.

[0009] Preferably, the outer periphery of the piston body and at the outer wall of the channel are provided with a circumferential enclosure, and the enclosure is independent of the valve ball and the piston body, and is supported by the side edge connecting the support rod of the inner wall of the valve core, and the upper part of the enclosure is abutted at the outer wall of the channel in normal state.

[0010] Preferably, the bottom and top of the enclosure are made of flexible material, and the middle is made of rigid material to connect the two.

[0011] Preferably, the caliber of the bottom of the enclosure is matched with the valve ball, and the valve ball and the bottom of the enclosure are connected to form the second seal.

[0012] Preferably, the bottom of the valve body is split into an independent extended sealing seat and is movably mounted by a flange and bolts.

[0013] (III) Beneficial Effects

[0014] Compared with the prior art, the automobile air conditioner matching valve core has the following advantages: the upper radial dimension of the automobile air conditioner matching valve core is slightly smaller than the diameter of the inner wall of the passage opening, the lower part of the automobile air conditioner matching valve core seals the passage opening into the evaporator as the first sealing, the automobile air conditioner matching valve core is provided with a surrounding body independent of the valve ball and the piston body, the bottom and the top of the surrounding body are made of flexible materials, the valve ball is buffered when the valve ball moves upward and hits the surrounding body with the help of the return spring and the piston body, the diameter of the bottom of the surrounding body is matched with the valve ball, the valve ball and the bottom of the surrounding body are connected to form the second sealing, and neither wear nor influence on the sealing effect occurs. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a cross-sectional schematic view of a conventional valve of the utility model;

[0016] Figure 2 It is a cross-sectional schematic view of the utility model;

[0017] Figure 3 It is a cross-sectional schematic view of the utility model Figure 2 It is an enlarged schematic view of the local structure at A of the utility model;

[0018] Figure 4 It is a cross-sectional schematic view of the utility model after improvement.

[0019] In the figure: 1, valve body; 2, diaphragm; 3, valve ball; 4, return spring; 5, flange; 6, valve core rod; 7, sealing seat; 8, piston body; 9, support rod; 10, abutting plate; 11, external base; 12, extended sealing seat. DETAILED DESCRIPTION

[0020] The utility model will be further described in detail below by means of the drawings and examples.

[0021] As Figure 1 shown: the use principle of the valve body is that the expansion amount of the diaphragm 2 (the built-in temperature sensing element) is transmitted to the valve core rod 6 (the diaphragm 2 expands and pushes downward to make the valve core rod 6 move downward) by detecting the temperature at the outlet of the evaporator, and then the evaporator inlet size is automatically adjusted (i.e. the amount of refrigerant entering is controlled).

[0022] An automobile air conditioner matching valve core, as Figure 1As shown, the valve core includes a valve body 1, a diaphragm 2, a valve core rod 6, a return spring 4 and a valve ball 3, which serves to control the inlet amount of the evaporator, wherein the bottom of the diaphragm 2 is connected with the valve core rod 6, the bottom end of the valve core rod 6 is connected with the valve ball 3, the bottom of the valve ball 3 is connected with the return spring 4, the temperature sensing element in the diaphragm 2 senses the higher temperature at the outlet of the evaporator, the diaphragm 2 drives the valve core rod 6 to move downward by a larger displacement, and at this time the opening of the valve ball 3 is increased.

[0023] After the temperature at the outlet of the evaporator is reduced, the return spring 4 drives the valve ball 3 to hit the outer wall of the channel each time, and long-term use will cause the valve ball 3 made of steel to be worn and the outer wall of the channel to be worn, thereby causing the problem of refrigerant leakage.

[0024] Therefore, improvements are made at this position, as shown in the drawings: Figures 2-3 As shown, a piston body 8 is first connected at the bottom of the valve rod, the piston body 8 is divided into an upper part and a lower part, the upper part blocks the channel opening into the evaporator, and the lower part extends around and closely adheres to the outer wall of the channel. Since the piston body 8 cannot be too tightly fitted with the inner diameter of the channel opening (it is easy to cause the channel to be difficult to press out), the radial dimension of the upper part of the piston body 8 needs to be slightly smaller than the diameter of the inner wall of the channel opening, and the lower part of the piston body 8 serves as the first seal, and then the material of the piston body 8 needs to be a flexible material, such as a flexible pad, silicone, etc., which can reduce the problem of impact and wear with the outer wall of the channel.

[0025] Secondly, the lower end of the piston body 8 is connected with the valve ball 3 matched with the return spring 4, the outer periphery of the piston body 8 and at the outer wall of the channel is provided with a circumferential enclosure, and the upper part thereof normally abuts against the outer wall of the channel.

[0026] The enclosure is independent of the valve ball 3 and the piston body 8, is supported by the support rod 9 connected with the inner wall of the valve core through the side, the bottom and the top of the enclosure are made of a flexible material, the middle is a rigid material connecting the two, so that the valve ball 3 is buffered when it moves upward with the piston body 8 to hit the enclosure by means of the return spring 4, and the caliber of the bottom of the enclosure is matched with the valve ball 3, so that the valve ball 3 and the bottom of the enclosure abut to form the second seal.

[0027] As shown in the drawings, Figure 4 As an improvement, the bottom of the valve body 1 can be split, an extension sealing seat 127 is movably installed by a flange 5 and a bolt, and then a detachable assembly body is formed, which is convenient for regular maintenance and replacement of the internal structure.

[0028] The above description is based on the examples, through the above description, relevant personnel can make various changes and modifications without deviating from the scope of the present invention. The scope of the novel technology used is not limited to the content in the specification, and the scope of protection must be determined according to the scope of claims.

Claims

1. An automobile air conditioning valve core, comprising a valve body, a diaphragm, a valve core stem, a reset spring and a valve ball, the bottom of the diaphragm is connected with the valve core stem, the bottom of the valve ball is connected with the reset spring, characterized in that: The bottom end of the valve core rod is connected with a piston body, which is divided into an upper part and a lower part, the upper part blocks the channel opening into the evaporator, and the lower part extends annularly and closely adheres to the outer wall of the channel, the radial dimension of the upper part of the piston body is smaller than the diameter of the inner wall of the channel opening, and the lower part of the piston body serves as the first seal, and the lower end of the piston body is connected with the valve ball. ​ 2. The valve core for automobile air conditioning according to claim 1, characterized in that: The material of the piston body is flexible pad or silica gel material.

3. The valve core for automobile air conditioning according to claim 1, characterized in that: The outer periphery of the piston body at the outer wall of the channel is provided with an annular enclosure body, the enclosure body is independent of the valve ball and the piston body, and the enclosure body is supported by the support rod connecting the inner wall of the valve core.

4. The automotive air conditioning valve core according to claim 3, characterized in that: The bottom and top of the enclosure body are made of flexible material, and the middle is rigid material connecting the two.

5. The automotive air conditioning valve core according to claim 4, characterized in that: The caliber of the bottom of the enclosure body is matched with the valve ball, and the valve ball and the bottom of the enclosure body form the second seal when they are connected.

6. The valve core for automobile air conditioner according to any one of claims 1-5, characterized in that: The bottom of the valve body is divided into an independent extension seal seat and is movably installed through a flange and a bolt.

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