Electronic refrigerant scale

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.

Description

A refrigerant electronic scale Technical Field

[0001] This utility model relates to an electronic scale, and more particularly to a refrigerant electronic scale. Background Technology

[0002] 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.

[0003] 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

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a practical refrigerant electronic scale.

[0005] 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.

[0006] 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:

[0007] 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.

[0008] 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.

[0009] 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.

[0010] 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.

[0011] 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, the lower end of the refrigerant bottle is inserted into the cavity and connected to the valve stem. This reduces the protruding length of the valve stem in the actual design, thus reducing the space occupied by the electronic scale.

[0012] In the aforementioned refrigerant electronic scale, two connecting blocks are fixed inside the outer casing, and valve stems two and three are respectively fixed to the two connecting blocks. The connecting blocks have strip-shaped flow channels, and valve stems two and three are connected to a tee fitting via corresponding strip-shaped flow channels. This design offers advantages such as simple structure and convenient installation.

[0013] In the aforementioned refrigerant electronic scale, valve stem two and valve stem three are positioned side by side to facilitate the arrangement of tee fittings.

[0014] Compared with existing technologies, this refrigerant electronic scale has the following advantages:

[0015] 1. 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.

[0016] 2. The valve stem is positioned close to the edge of the weighing pan. This effectively reduces the area occupied by the valve stem in the middle of the weighing pan while meeting the weighing requirements. This allows for stable accommodation of a large tank of refrigerant without changing the size of the weighing pan, keeping the electronic scale compact. Attached Figure Description

[0017] Figure 1 is a three-dimensional schematic diagram of a refrigerant electronic scale.

[0018] Figure 2 is a schematic diagram of the internal structure of the refrigerant electronic scale.

[0019] Figure 3 is a schematic diagram of the installation of valve stem three.

[0020] In the diagram, 1 is the outer casing; 2 is the weighing pan; 2a is the clearance hole; 2a1 is the concave cavity; 2a2 is the through hole; 3 is the solenoid valve; 4 is the valve one; 5 is the valve two; 6 is the load cell; 7 is the connecting pipe; 8 is the valve three; 9 is the tee fitting; 10 is the connecting block; 10a is the strip flow channel; and 11 is the rubber pad. Detailed Implementation

[0021] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0022] The main improvement of this refrigerant electronic scale lies in the change of the refrigerant delivery structure; other aspects are similar to existing technologies and will not be elaborated here.

[0023] Specifically

[0024] As shown in Figures 1 and 2, this refrigerant electronic scale includes a housing 1 and a weighing pan 2 horizontally arranged on the housing 1. The housing 1 is equipped with a solenoid valve 3, a valve stem 4, a valve stem 5, and a load cell 6. The weighing pan 2 is connected to the load cell 6 by screws.

[0025] in,

[0026] As shown in Figures 2 and 3, valve stem 4 and valve stem 5 are both vertically positioned, with their upper ends extending out of the housing 1. The solenoid valve 3 has two ends; the lower end of valve stem 4 is connected to one end of the solenoid valve 3, and in the actual product, the lower end of valve stem 4 is connected to one end of the solenoid valve 3 through a connecting pipe 7; the housing 1 also contains valve stem 8 and a three-way fitting 9; valve stem 8 is vertically positioned, and the weighing pan 2 has a clearance hole 2a for the upper end of valve stem 8 to extend out; one end of the three-way fitting 9 is connected to the other end of the solenoid valve 3, and the other two ends of the three-way fitting 9 are connected to the lower ends of valve stem 5 and valve stem 8, respectively.

[0027] 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:

[0028] When using a large tank of refrigerant, the refrigerant tank is placed on the weighing pan 2 and connected to the valve 2 5 through a pipe fitting. The refrigerant enters the equipment to be injected through the valve 2 5, the three-way fitting 9, the solenoid valve 3, and the valve 4. The weight of the refrigerant tank is detected 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 3 is closed to cut off the refrigerant delivery, thus realizing the quantitative delivery of refrigerant.

[0029] When using small bottles of refrigerant, the refrigerant bottle is directly screwed onto valve 38 and pressed onto weighing pan 2. The refrigerant enters the equipment to be injected through valve 38, three-way fitting 9, solenoid valve 3, and valve 4. 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, solenoid valve 3 closes to cut off the refrigerant delivery, thus achieving quantitative refrigerant delivery.

[0030] With the cooperation of components such as valve stem 25, valve stem 38, and tee fitting 9, 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.

[0031] To further explain, the valve stem 38 is positioned close to the edge of the weighing pan 2. While meeting the weighing requirements, this effectively reduces the area occupied by the valve stem 38 in the middle of the weighing pan 2, allowing it to stably accommodate a large tank of refrigerant without changing the size of the weighing pan 2, thus keeping the electronic scale compact.

[0032] In this embodiment,

[0033] As shown in Figures 1 and 3, the clearance hole 2a is formed as follows: the top wall of the weighing pan 2 extends downward to form a concave cavity 2a1. A through hole 2a2 vertically penetrates the bottom wall of the concave cavity 2a1. The concave cavity 2a1 and the through hole 2a2 together constitute the aforementioned clearance hole 2a. There is an annular gap between the inner wall of the concave cavity 2a1 and the outer wall of the valve stem 2 5, and the annular gap and the valve stem 3 8 are coaxially arranged. In actual use, the lower end of the refrigerant bottle is inserted into the concave cavity 2a1 and connected to the valve stem 3 8. This reduces the protruding length of the valve stem 3 8 in the actual design, thus reducing the space occupied by the electronic scale.

[0034] As shown in Figures 2 and 3, the connection method between the tee fitting 9 and valves 2 and 3 is as follows: Two connecting blocks 10 are fixed inside the outer casing 1, and valves 2 and 3 are respectively fixed on the two connecting blocks 10. Each connecting block 10 has a strip-shaped flow channel 10a, through which valves 2 and 3 connect to the tee fitting 9. This design has the advantages of simple structure and convenient installation. Preferably, valves 2 and 3 are arranged side-by-side to facilitate the arrangement of the tee fitting 9.

[0035] In the actual product, a rubber pad 11 is also laid flat on the weighing pan 2. The rubber pad 11 has a vertical insertion hole that is set directly opposite the cavity 2a1, and the diameter of the insertion hole is larger than the diameter of the cavity 2a1.

[0036] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A refrigerant electronic scale, comprising a housing (1) and a weighing pan (2) horizontally disposed on the housing (1), wherein a solenoid valve (3), a valve stem one (4), and a valve stem two (5) are disposed inside the housing (1), the valve stem one (4) and the valve stem two (5) are both vertically disposed and their upper ends extend out of the housing (1), and the lower end of the valve stem one (4) is connected to one end of the solenoid valve (3), characterized in that, The outer casing (1) is also provided with valve three (8) and three-way fitting (9); valve three (8) is set vertically, and the weighing pan (2) is provided with a clearance hole (2a) for the upper end of valve three (8) to extend; one end of the three-way fitting (9) is connected to the other end of the solenoid valve (3), and the other two ends of the three-way fitting (9) are connected to the lower end of valve two (5) and the lower end of valve three (8) respectively.

2. The refrigerant electronic scale according to claim 1, characterized in that, The above-mentioned valve stem three (8) is set near the edge of the weighing pan (2).

3. The refrigerant electronic scale according to claim 2, characterized in that, The top wall of the weighing pan (2) extends downward to form a concave cavity (2a1). 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 aforementioned clearance hole (2a). There is an annular gap between the inner wall of the concave cavity (2a1) and the outer wall of the valve stem (5).

4. The refrigerant electronic scale according to claim 1, 2, or 3, characterized in that, Two connecting blocks (10) are fixed inside the outer casing (1), and valve two (5) and valve three (8) are fixed on the two connecting blocks (10) respectively. The connecting blocks (10) are provided with strip-shaped flow channels. Valve two (5) and valve three (8) are connected to the tee fitting (9) through the corresponding strip-shaped flow channels (10a) respectively.

5. The refrigerant electronic scale according to claim 4, characterized in that, The valve stem 2 (5) and valve stem 3 (8) are positioned side by side.

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