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WO-2026090821-A1 - ELECTRONIC REFRIGERANT SCALE

WO2026090821A1WO 2026090821 A1WO2026090821 A1WO 2026090821A1WO-2026090821-A1

Abstract

An electronic refrigerant scale, comprising a housing (1) and a weighing platform (2) horizontally arranged on the housing (1). A solenoid valve (3), a first charging valve (4), and a second charging valve (5) are disposed within the housing (1). The first charging valve (4) and the second charging valve (5) are both vertically arranged, upper ends of the two valves both extend out of the housing (1), a lower end of the first charging valve (4) is in communication with one end of the solenoid valve (3), and a third charging valve (8) and a three-way pipe fitting (9) are further disposed within the housing (1). The third charging valve (8) is vertically arranged, and the weighing platform (2) is provided with a clearance hole (2a) for an upper end of the third charging valve (8) to extend out. One end of the three-way pipe fitting (9) is in communication with the other end of the solenoid valve (3), and the other two ends of the three-way pipe fitting (9) are in communication with a lower end of the second charging valve (5) and a lower end of the third charging valve (8), respectively. Thus, the problem of poor practicability of existing electronic scales is solved.

Inventors

  • GUO, Dingyun

Dates

Publication Date
20260507
Application Date
20241029
Priority Date
20241028

Claims (5)

  1. A refrigerant electronic scale includes a housing (1) and a weighing pan (2) horizontally arranged on the housing (1). The housing (1) is provided with a solenoid valve (3), a valve one (4) and a valve two (5). The valve one (4) and the valve two (5) are both vertically arranged and their upper ends extend out of the housing (1). The lower end of the valve one (4) is connected to one end of the solenoid valve (3). The characteristic feature is that the housing (1) is also provided with a valve three (8) and a three-way pipe (9). The valve three (8) is vertically arranged and the weighing pan (2) is provided with a clearance hole (2a) for the upper end of the valve three (8) to extend out. One end of the three-way pipe (9) is connected to the other end of the solenoid valve (3), and the other two ends of the three-way pipe (9) are respectively connected to the lower end of the valve two (5) and the lower end of the valve three (8).
  2. According to claim 1, the refrigerant electronic scale is characterized in that the above-mentioned valve three (8) is arranged near the edge of the weighing pan (2).
  3. According to claim 2, the refrigerant electronic scale is characterized in that the top wall of the weighing pan (2) extends downward to form a concave cavity (2a1), and a through hole (2a2) is vertically penetrating the bottom wall of the concave cavity (2a1). The concave cavity (2a1) and the through hole (2a2) together constitute the above-mentioned clearance hole (2a), and there is an annular gap between the inner wall of the concave cavity (2a1) and the outer wall of the valve nozzle (5).
  4. According to claim 1, 2 or 3, the refrigerant electronic scale is characterized in that two connecting blocks (10) are fixed inside the outer shell (1), and valve two (5) and valve three (8) are respectively fixed on the two connecting blocks (10). The connecting blocks (10) are provided with strip-shaped flow channels, and valve two (5) and valve three (8) are respectively connected to the three-way pipe fitting (9) through the corresponding strip-shaped flow channels (10a).
  5. According to claim 4, the refrigerant electronic scale is characterized in that valve stem two (5) and valve stem three (8) are arranged side by side.

Description

A refrigerant electronic scale Technical Field This utility model relates to an electronic scale, and more particularly to a refrigerant electronic scale. Background Technology A refrigerant electronic scale is a type of electronic scale specifically used for the quantitative addition and recovery of refrigerant. Its structure is similar to that of a refrigerant quantitative adder disclosed in the Chinese Patent Database (application number: 200910074376.6), including a weighing chassis, a weighing pan, a load cell, a bistable solenoid valve, a battery, a microcontroller and its control circuit board, a first connector, a second connector, a display screen, and operation buttons. The first and second connectors are respectively connected to the inlet and outlet of the bistable solenoid valve. The microcontroller and its control circuit board are respectively connected to the load cell, the bistable solenoid valve, the display screen, the battery, and the operation buttons. A rotary compressor is added, with its suction port connected in sequence to a filter, a pressure gauge, and a third connector, and its outlet connected in sequence to an oil separator, a condenser, a pressure gauge, and a fourth connector. When using the above-mentioned refrigerant dispenser, the refrigerant tank is placed on the weighing pan and connected to the first connector via a pipe fitting. Because the weighing pan and the first connector are staggered, this method is only suitable for canned refrigerant and cannot be used with bottled refrigerant that can be directly screwed on. Utility Model Content The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a practical refrigerant electronic scale. The objective of this utility model can be achieved through the following technical solution: A refrigerant electronic scale includes a housing and a weighing pan horizontally arranged on the housing. The housing contains a solenoid valve, valve stem one, and valve stem two. Both valve stem one and valve stem two are vertically arranged and their upper ends extend out of the housing. The lower end of valve stem one is connected to one end of the solenoid valve. The housing also contains valve stem three and a three-way fitting. Valve stem three is vertically arranged, and the weighing pan has a clearance hole for the upper end of valve stem three to extend out. One end of the three-way fitting is connected to the other end of the solenoid valve, and the other two ends of the three-way fitting are respectively connected to the lower ends of valve stem two and valve stem three. This electronic scale can be used for quantitative refrigerant filling or recovery. The following describes the usage process of this electronic scale using the quantitative filling method: When using a large tank of refrigerant, the refrigerant tank is placed on a weighing pan and connected to valve two through a pipe. The refrigerant enters the equipment to be injected through valve two, a three-way pipe, a solenoid valve, and valve one. The weight of the refrigerant tank is measured by weighing to determine the amount of refrigerant to be added. When the set amount of refrigerant to be added is reached, the solenoid valve closes to cut off the refrigerant delivery, thus achieving quantitative refrigerant delivery. When using small bottles of refrigerant, the refrigerant bottle is screwed directly onto valve three and pressed onto the weighing pan. The refrigerant enters the equipment to be injected through valve three, the three-way fitting, the solenoid valve, and valve one. The weight of the refrigerant bottle is used to determine the amount of refrigerant to be added. When the set amount of refrigerant to be added is reached, the solenoid valve closes to cut off the refrigerant delivery, thus achieving quantitative refrigerant delivery. With the cooperation of components such as valve stem 2, valve stem 3, and tee fittings, this electronic scale can be used with both large and small refrigerant tanks, effectively expanding its application range and offering advantages such as ease of use and high practicality. In the aforementioned refrigerant electronic scale, the valve three is positioned near the edge of the weighing pan. While meeting the weighing requirements, this effectively reduces the area occupied by the valve three in the middle of the weighing pan, allowing for stable accommodation of large tanks of refrigerant without changing the size of the weighing pan, thus keeping the electronic scale compact. In the aforementioned refrigerant electronic scale, the top wall of the weighing pan extends downward to form a concave cavity. A through hole runs vertically through the bottom wall of the cavity. The cavity and the through hole together constitute the aforementioned clearance hole, and there is an annular gap between the inner wall of the cavity and the outer wall of the valve stem. In actual use,