Condensing pressure regulating valve and refrigerating system applying same

Abstract

The utility model discloses a condensing pressure regulating valve and a refrigerating system with the condensing pressure regulating valve, and belongs to the field of refrigeration. The condensing pressure regulating valve comprises a valve body and a valve needle assembly. The valve body is provided with a valve body valve port and a valve body upper cavity above the valve body valve port. And a valve port peripheral bulge is arranged on the top surface of the valve port of the valve body. And the valve needle assembly is arranged in the upper cavity of the valve body. The valve needle assembly is provided with a valve needle vertical shaft, a valve needle sealing gasket and a valve needle pressing gasket. The valve needle sealing gasket has the advantages that before the condensing pressure of a refrigerating medium reaches the opening pressure of the valve port, the valve needle sealing gasket closes the valve port of the valve body, internal leakage is controlled within the required range, the condensing pressure of the refrigerating medium reaches the opening pressure of the valve port more quickly, and the efficiency of a refrigerating system is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of refrigeration, especially a condensing pressure regulating valve and a refrigeration system using the same. BACKGROUND

[0002] In a refrigeration system, the condensing pressure regulating valve plays a crucial role. The main function of the condensing pressure regulating valve is to ensure that the condensing pressure is always maintained within a set normal range. Excessively high condensing pressure can cause damage to the refrigeration equipment and increase energy consumption, while excessively low condensing pressure can interfere with the liquefaction process of the refrigerant, affect the operation of the expansion valve, and thus cause a significant decrease in the efficiency of the refrigeration system.

[0003] The technical solution of Chinese patent CN219062478U "A condensing pressure regulating valve" includes a valve seat, a valve stem, and a valve core. The valve core directly seals the valve port of the valve seat. The disadvantage of the above technical solution is that the valve core structure is simple and cannot seal the valve port of the valve seat well, resulting in serious internal leakage. SUMMARY

[0004] The technical problem to be solved by the utility model is that the condensing pressure regulating valve has serious internal leakage. The utility model provides a condensing pressure regulating valve and a refrigeration system using the same.

[0005] To solve the above technical problem, the utility model provides a technical solution: a condensing pressure regulating valve, which includes a valve body and a valve needle assembly. The valve body has a valve body valve port and a valve body upper chamber above the valve body valve port. The top surface of the valve body valve port has a valve port peripheral protrusion. The valve needle assembly is inside the valve body upper chamber. The valve needle assembly has a valve needle vertical shaft, a valve needle sealing pad, and a valve needle compression pad. The valve needle vertical shaft has a vertical shaft maximum diameter section, a vertical shaft second maximum diameter section, a vertical shaft second minimum diameter section, and a vertical shaft minimum diameter section arranged in order from top to bottom. The vertical shaft second minimum diameter section is surrounded by the valve needle sealing pad. The vertical shaft minimum diameter section is surrounded by the valve needle compression pad. The top surface of the valve needle sealing pad abuts against the bottom surface of the vertical shaft second maximum diameter section, the inner edge position of the bottom surface of the valve needle sealing pad abuts against the outer edge position of the top surface of the valve needle compression pad, and the outer edge position of the bottom surface of the valve needle sealing pad is above the valve port peripheral protrusion. Before the condensing pressure of the refrigerant reaches the valve port opening pressure, the outer edge position of the bottom surface of the valve needle sealing pad abuts against the top surface of the valve port peripheral protrusion to ensure that the valve body valve port is closed. The beneficial effect is at least that before the condensing pressure of the refrigerant reaches the valve port opening pressure, the valve needle sealing pad closes the valve body valve port, controls the internal leakage within the required range, more quickly establishes that the condensing pressure of the refrigerant reaches the valve port opening pressure, and further improves the efficiency of the refrigeration system.

[0006] As the preferred scheme of the condensing pressure regulating valve, the vertical axis of the valve needle and the valve port of the valve body have a common axis, the maximum diameter section of the vertical axis is in axial hole cooperation with the upper chamber of the valve body, and the maximum diameter section of the vertical axis is displaced up and down along the upper chamber of the valve body. The beneficial effect at least lies in: ensuring smooth displacement of the vertical axis of the valve needle.

[0007] As the preferred scheme of the condensing pressure regulating valve, the inner edge of the top surface of the valve needle compression pad is located against the bottom surface of the sub-minor diameter section of the vertical axis, the lower end of the minimum diameter section of the vertical axis is formed with a necking flange, and the inner edge of the bottom surface of the valve needle compression pad is located against the top surface of the necking flange. The beneficial effect at least lies in: realizing positioning of the valve needle compression pad.

[0008] As the preferred scheme of the condensing pressure regulating valve, the valve needle assembly further has a valve needle compression spring, the valve needle compression spring has a spring upper end and a spring lower end, the spring upper end is wrapped outside the sub-major diameter section of the vertical axis, the end surface of the spring upper end is located against the bottom surface of the maximum diameter section of the vertical axis, the spring lower end is wrapped outside the peripheral protrusion of the valve port, and the end surface of the spring lower end is located against the top surface of the valve port of the valve body. The valve needle compression spring always provides an upward force to the vertical axis of the valve needle. The beneficial effect at least lies in: realizing positioning of the valve needle compression spring and preventing radial deformation of the valve needle compression spring.

[0009] As the preferred scheme of the condensing pressure regulating valve, further comprising: an adjusting assembly, the adjusting assembly has an adjusting block above the maximum diameter section of the vertical axis, and the bottom surface of the adjusting block is located against the top surface of the maximum diameter section of the vertical axis, and the valve port opening pressure is set by the adjusting block.

[0010] As the preferred scheme of the condensing pressure regulating valve, the upper chamber of the valve body has a valve body medium inlet, and the valve body medium inlet is located at the side of the upper chamber of the valve body; and the lower chamber of the valve body has a valve body medium outlet, and the valve body medium outlet is located at the bottom or side of the lower chamber of the valve body. The beneficial effect at least lies in: the valve body medium inlet and the valve body medium outlet at different positions can be applied to different installation environments.

[0011] Another technical scheme provided by the utility model provides a refrigerating system applying the condensing pressure regulating valve. The beneficial effect at least lies in: before the condensing pressure of the refrigerating medium reaches the valve port opening pressure, the valve needle sealing pad closes the valve port of the valve body, controls the internal leakage within the required range, more quickly establishes the condensing pressure of the refrigerating medium to reach the valve port opening pressure, and further improves the efficiency of the refrigerating system.

[0012] In addition to the technical problems solved by the present application, the technical features of the technical solutions and the beneficial effects brought by these technical features, the other technical problems solved by the present application, the other technical features included in the technical solutions and the beneficial effects brought by these technical features will be further described in detail in combination with the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a structural schematic view of the condensing pressure regulating valve of the present application.

[0014] Figure 2 is a structural schematic view of the valve needle assembly of the present application.

[0015] Figure 3 is a structural schematic view of the refrigeration system of the present application. DETAILED DESCRIPTION

[0016] The present application will be further described in detail in combination with the drawings through specific embodiments. It should be noted that the description of these embodiments is used to help understand the present application, but does not constitute a limitation on the present application. In addition, the technical features involved in each embodiment of the present application described below can be combined with each other as long as there is no conflict between them.

[0017] Referring to Figure 1 , a condensing pressure regulating valve is shown in the figure. The condensing pressure regulating valve is an important element of a refrigeration system. The condensing pressure regulating valve is used to regulate the condensing pressure of a refrigeration medium.

[0018] The condensing pressure regulating valve comprises a valve body 1, a valve needle assembly 2, an adjusting assembly 3 and the like.

[0019] The valve body 1 has a valve body valve port 11, a valve body upper chamber 12 located above the valve body valve port 11 and a valve body lower chamber 13 located below the valve body valve port 11. The valve body valve port 11 is in communication with the valve body upper chamber 12 and the valve body lower chamber 13 respectively. The valve body upper chamber 12 has a valve body medium inlet 120. The valve body lower chamber 13 has a valve body medium outlet 130. The specific flow direction of the refrigeration medium is as follows: first, the refrigeration medium flows into the valve body upper chamber 12 through the valve body medium inlet 120, then enters the valve body lower chamber 13 from the valve body upper chamber 12 through the valve body valve port 11, and finally flows out of the valve body lower chamber 13 through the valve body medium outlet 130.

[0020] The valve body medium inlet and the valve body medium outlet in different positions can be suitable for different installation environments. In the embodiment, the valve body medium inlet 120 is located at the side of the upper chamber 12 of the valve body, and the valve body medium outlet 130 is located at the bottom of the lower chamber 13 of the valve body. In other embodiments, the valve body medium inlet is located at the side of the upper chamber of the valve body, and the valve body medium outlet is located at the side of the lower chamber of the valve body.

[0021] The top surface of the valve body valve port 11 has a port peripheral protrusion 111.

[0022] Referring to Figure 2 , the valve needle assembly 2 is inside the upper chamber 12 of the valve body. The valve needle assembly 2 has a valve needle vertical shaft 21, a valve needle sealing pad 22, a valve needle compression pad 23, and a valve needle compression spring 24, etc. The valve needle vertical shaft 21 has a common axis with the valve body valve port 11. The valve needle vertical shaft 21 has a vertical shaft maximum diameter section 211, a vertical shaft sub-maximum diameter section 212, a vertical shaft sub-minimum diameter section 213, and a vertical shaft minimum diameter section 214 arranged in order from top to bottom. Among them, the outer diameter of the vertical shaft sub-maximum diameter section 212 is smaller than the outer diameter of the vertical shaft maximum diameter section 211, the outer diameter of the vertical shaft sub-minimum diameter section 213 is smaller than the outer diameter of the vertical shaft sub-maximum diameter section 212, and the outer diameter of the vertical shaft minimum diameter section 214 is smaller than the outer diameter of the vertical shaft sub-minimum diameter section 213.

[0023] The vertical shaft maximum diameter section 211 is axially matched with the upper chamber 12 of the valve body. The vertical shaft maximum diameter section 211 can be displaced up and down along the upper chamber 12 of the valve body.

[0024] The vertical shaft sub-minimum diameter section 213 is surrounded by the valve needle sealing pad 22. The inner edge position and the outer edge position of the top surface of the valve needle sealing pad 22 are both abutted to the bottom surface of the vertical shaft sub-maximum diameter section 212. The outer edge position of the bottom surface of the valve needle sealing pad 22 is above the port peripheral protrusion 111.

[0025] The vertical shaft minimum diameter section 214 is surrounded by the valve needle compression pad 23. The inner edge position of the top surface of the valve needle compression pad 23 is abutted to the bottom surface of the vertical shaft sub-minimum diameter section 213. The outer edge position of the top surface of the valve needle compression pad 23 is abutted to the inner edge position of the bottom surface of the valve needle sealing pad 22. The lower end of the vertical shaft minimum diameter section 214 is formed with a necking flange 2141. The bottom surface of the valve needle compression pad 23 is abutted to the top surface of the necking flange 2141. In this way, the valve needle compression pad 23 is positioned by the vertical shaft sub-minimum diameter section 213 and the necking flange 2141.

[0026] The valve needle compression spring 24 has a spring upper end and a spring lower end. The spring upper end is wrapped outside the minor diameter section 212 of the vertical shaft. The end face of the spring upper end abuts against the bottom face of the major diameter section 211 of the vertical shaft. The spring lower end is wrapped outside the valve port peripheral protrusion 111. The end face of the spring lower end abuts against the top face of the valve body valve port 11. The valve needle compression spring 24 is always in compression. The valve needle compression spring 24 provides upward force to the vertical shaft 21 of the valve needle.

[0027] The adjusting assembly 3 has an adjusting block 31. The adjusting block 31 is above the major diameter section 211 of the vertical shaft. The bottom face of the adjusting block 31 abuts against the top face of the major diameter section 211 of the vertical shaft. The valve port opening pressure of the valve body valve port 11 is set by the adjusting block 31.

[0028] Before the condensing pressure of the refrigerant reaches the valve port opening pressure, the top face of the valve port peripheral protrusion 111 abuts against the outer edge position of the bottom face of the valve needle sealing gasket 22, so as to ensure that the valve body valve port 11 is closed, control the internal leakage within the required range, and faster establish the condensing pressure of the refrigerant to reach the valve port opening pressure, thereby further improving the efficiency of the refrigeration system. After the condensing pressure of the refrigerant reaches the valve port opening pressure, the resultant force of the medium pressure of the refrigerant and the force of the valve needle compression spring 24 moves the vertical shaft 21 of the valve needle upward, the top face of the valve port peripheral protrusion 111 is away from the outer edge position of the bottom face of the valve needle sealing gasket 22, and the valve body valve port 11 is opened.

[0029] Referring to Figure 3 , a refrigeration system using the condensing pressure regulating valve is shown in the figure. The working principle of the refrigeration system is as follows: when the condensing pressure of the refrigerant reaches the valve port opening pressure, the valve body valve port is opened, and the refrigerant flows to the liquid accumulator. At this time, the condensing pressure of the refrigerant gradually decreases. When the condensing pressure of the refrigerant is below the valve port opening pressure, the valve body valve port is closed, and the condensing pressure of the refrigerant gradually rises.

[0030] The above only expresses the embodiments of the present application, and the description is relatively specific and detailed, but it cannot be understood as a limitation on the scope of the utility model patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A condensing pressure regulating valve characterized by, Comprising: a valve body and a valve needle assembly; the valve body has a valve body valve port and a valve body upper chamber above the valve body valve port, a top surface of the valve body valve port has a valve port peripheral protrusion; the valve needle assembly is inside the valve body upper chamber, the valve needle assembly has a valve needle vertical shaft, a valve needle sealing pad and a valve needle compression pad, the valve needle vertical shaft has a vertical shaft maximum diameter section, a vertical shaft sub-maximum diameter section, a vertical shaft sub-minimum diameter section and a vertical shaft minimum diameter section arranged in sequence from top to bottom, the vertical shaft sub-minimum diameter section is surrounded by the valve needle sealing pad, the vertical shaft minimum diameter section is surrounded by the valve needle compression pad, a top surface of the valve needle sealing pad abuts a bottom surface of the vertical shaft sub-maximum diameter section, an inner edge position of a bottom surface of the valve needle sealing pad abuts an outer edge position of a top surface of the valve needle compression pad, an outer edge position of the bottom surface of the valve needle sealing pad is above the valve port peripheral protrusion; before a condensing pressure of a refrigerant reaches a valve port opening pressure, the outer edge position of the bottom surface of the valve needle sealing pad abuts a top surface of the valve port peripheral protrusion to ensure that the valve body valve port is closed.

2. The condensing pressure regulating valve according to claim 1, wherein The valve needle vertical shaft and the valve body valve port have a common axis, the vertical shaft maximum diameter section is in axial hole cooperation with the valve body upper chamber, so that the vertical shaft maximum diameter section is displaced up and down along the valve body upper chamber.

3. The condensing pressure regulating valve according to claim 1, wherein An inner edge position of a top surface of the valve needle compression pad abuts a bottom surface of the vertical shaft sub-minimum diameter section, a lower end of the vertical shaft minimum diameter section is formed with a necking flange, an inner edge position of a bottom surface of the valve needle compression pad abuts a top surface of the necking flange.

4. The condensing pressure regulating valve according to claim 1, wherein The valve needle assembly further has a valve needle compression spring, the valve needle compression spring has a spring upper end and a spring lower end, the spring upper end is surrounded outside the vertical shaft sub-maximum diameter section, an end surface of the spring upper end abuts a bottom surface of the vertical shaft maximum diameter section, the spring lower end is surrounded outside the valve port peripheral protrusion, an end surface of the spring lower end abuts a top surface of the valve body valve port, the valve needle compression spring always provides an upward force to the valve needle vertical shaft.

5. The condensing pressure regulating valve according to claim 1, wherein Further comprising: an adjusting assembly, the adjusting assembly has an adjusting block above the vertical shaft maximum diameter section, a bottom surface of the adjusting block abuts a top surface of the vertical shaft maximum diameter section, the valve port opening pressure is set by the adjusting block.

6. The condensing pressure regulating valve according to claim 1, wherein The valve body upper chamber has a valve body medium inlet, the valve body medium inlet is at a side position of the valve body upper chamber; the valve body lower chamber has a valve body medium outlet, the valve body medium outlet is at a bottom position or a side position of the valve body lower chamber.

7. A refrigeration system using the condensing pressure regulating valve according to any one of claims 1 to 6.

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