Refrigerant electronic scale

Abstract

The utility model provides a refrigerant electronic scale, which solves the problem that the existing electronic scale is poor in practicability. The refrigerant electronic scale comprises a shell and a scale pan horizontally arranged on the shell, an electromagnetic valve, a first inflating valve and a second inflating valve are arranged in the shell, the first inflating valve and the second inflating valve are vertically arranged, the upper ends of the first inflating valve and the second inflating valve extend out of the shell, the lower end of the first inflating valve is communicated with one end of the electromagnetic valve, and a third inflating valve and a three-way pipe fitting are further arranged in the shell; the third inflating valve is vertically arranged, and a receding hole for the upper end of the third inflating valve to extend out is formed in the scale pan. And the other two ends of the three-way pipe fitting are respectively communicated with the lower end of the inflating valve II and the lower end of the inflating valve III. The refrigerant electronic scale is relatively practical.

Description

Technical Field

[0001] The utility model relates to an electronic scale, in particular to a refrigerant electronic scale. Background Art

[0002] The refrigerant electronic scale is an electronic scale specifically used for quantitative filling and recycling of refrigerants (refrigerants). Its structure is similar to a refrigerant quantitative filler disclosed in the China Patent Library (application number: 200910074376.6), including a scale chassis, a weighing pan, a weighing sensor, a bistable solenoid valve, a battery, a single-chip microcomputer and its control circuit board, a first connector, a second connector, a display screen and an operating button. The first connector and the second connector are respectively connected to the inlet and outlet of the bistable solenoid valve, the single-chip microcomputer and its control circuit board are respectively connected to the weighing sensor, the bistable solenoid valve, the display screen, the battery and the operating button. A rotary compressor is added, and its air intake is connected to a filter, a pressure gauge and a third connector in sequence, and its air outlet is connected to an oil separator, a condenser, a pressure gauge and a fourth connector respectively.

[0003] When using the above-mentioned filler, the refrigerant can is placed on the scale plate and connected to the first connector via a pipe. Since the scale plate and the first connector are staggered, this method is only suitable for canned refrigerant and cannot be adapted for bottled refrigerant that can be directly screwed in. Utility Model Content

[0004] The purpose of the utility model is to solve the above problems in the existing technology and to provide a refrigerant electronic scale with good practicality.

[0005] The purpose of the utility model can be achieved through the following technical solutions: a refrigerant electronic scale, comprising a shell and a weighing pan horizontally arranged on the shell, a solenoid valve, valve nozzle 1 and valve nozzle 2 are provided in the shell, valve nozzle 1 and valve nozzle 2 are both vertically arranged and the upper ends of both extend out of the shell, the lower end of valve nozzle 1 is connected to one end of the solenoid valve, and it is characterized in that valve nozzle 3 and a three-way pipe fitting are also provided in the shell; valve nozzle 3 is vertically arranged, and a makeshift hole extending from the upper end of valve nozzle 3 is provided on the weighing pan; one end of the three-way pipe fitting is connected to the other end of the solenoid valve, and the other two ends of the three-way pipe fitting are respectively connected to the lower end of valve nozzle 2 and the lower end of valve nozzle 3.

[0006] This electronic scale can be used for quantitative refrigerant filling or quantitative recovery. The following describes the use of this electronic scale in quantitative filling mode:

[0007] When a large tank of refrigerant is used, the refrigerant tank is placed on the scale and connected to valve nozzle 2 through a pipe fitting. The refrigerant enters the equipment to be injected with refrigerant through valve nozzle 2, tee pipe fitting, solenoid valve, and valve nozzle 1. The weight of the refrigerant tank is detected by weighing to determine the refrigerant filling amount. When the set refrigerant filling amount is reached, the solenoid valve closes and cuts off the refrigerant delivery, realizing quantitative refrigerant delivery.

[0008] When a small bottle of refrigerant is used, the refrigerant bottle is directly screwed onto valve nozzle 3 and pressed onto the scale pan. The refrigerant enters the equipment to be injected with refrigerant through valve nozzle 3, tee pipe fitting, solenoid valve, and valve nozzle 1. The weight of the refrigerant bottle is detected by weighing to determine the refrigerant filling amount. When the set refrigerant filling amount is reached, the solenoid valve closes and cuts off the refrigerant delivery, realizing quantitative refrigerant delivery.

[0009] With the cooperation of valve nozzle 2, valve nozzle 3, tee pipe fitting and other components, this electronic scale can be used with both large tanks of refrigerant and small bottles of refrigerant, thereby effectively expanding the scope of use of this electronic scale. It has the advantages of ease of use and good practicality.

[0010] In the above-mentioned refrigerant electronic scale, the above-mentioned valve nozzle three is arranged close to the edge of the scale plate. Under the premise of meeting the weighing requirements, the area occupied by the valve nozzle three in the middle position of the scale plate can be effectively reduced, so as to stably accommodate large tanks of refrigerant without changing the size of the scale plate, so that the size of the electronic scale remains small.

[0011] In the aforementioned electronic refrigerant scale, the top wall of the scale pan extends downward to form a concave cavity, the bottom wall of which is vertically penetrated by a through-hole. Together, the concave cavity and the through-hole constitute the aforementioned clearance hole, and an annular gap exists between the inner wall of the concave cavity and the outer wall of valve stem 2. In actual use, the lower end of the refrigerant bottle is inserted into the concave cavity and connected to valve stem 3. This reduces the protruding length of valve stem 3 in the actual design, reducing the space occupied by the electronic scale.

[0012] In the aforementioned electronic refrigerant scale, two connecting blocks are fixed within the housing, and valves 2 and 3 are respectively fixed to the two connecting blocks. Strip-shaped flow channels are provided within the connecting blocks, and valves 2 and 3 are connected to the tee pipe fitting via corresponding strip-shaped flow channels. This design has the advantages of simple structure and easy installation.

[0013] In the above-mentioned refrigerant electronic scale, the second valve and the third valve are arranged in parallel to facilitate the arrangement of the three-way pipe.

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

[0015] 1. With the cooperation of valve nozzle 2, valve nozzle 3, tee pipe fittings and other components, this electronic scale can be used with both large tanks of refrigerant and small bottles of refrigerant, which effectively expands the scope of use of this electronic scale and has the advantages of ease of use and good practicality.

[0016] 2. The valve nozzle 3 is set close to the edge of the scale plate. Under the premise of meeting the weighing requirements, it can effectively reduce the area occupied by the valve nozzle 3 in the middle of the scale plate, so as to stably accommodate large tanks of refrigerant without changing the size of the scale plate, keeping the size of the electronic scale small. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0019] Figure 3 This is the installation diagram of valve nozzle three.

[0020] In the figure, 1. outer shell; 2. weighing pan; 2a. clearance hole; 2a1. concave cavity; 2a2. through hole; 3. solenoid valve; 4. valve stem 1; 5. valve stem 2; 6. weighing sensor; 7. connecting pipe; 8. valve stem 3; 9. three-way pipe fitting; 10. connecting block; 10a. strip flow channel; 11. rubber pad. DETAILED DESCRIPTION

[0021] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but 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 conveying structure. Other aspects are similar to the existing technology and will not be explained in detail here.

[0023] Specifically,

[0024] like Figure 1 and Figure 2 As shown, the refrigerant electronic scale includes a shell 1 and a weighing pan 2 horizontally arranged on the shell 1, and a solenoid valve 3, a valve nozzle 1 4, a valve nozzle 2 5 and a weighing sensor 6 are arranged in the shell 1, and the weighing pan 2 is connected to the weighing sensor 6 by screws.

[0025] in,

[0026] like Figure 2 and Figure 3 As shown, valve 1 4 and valve 2 5 are both arranged vertically, and their upper ends extend out of the housing 1. The solenoid valve 3 has two ends; the lower end of valve 1 4 is connected to one end of the solenoid valve 3, and in the actual product, the lower end of valve 1 4 is connected to one end of the solenoid valve 3 via a connecting pipe 7. The housing 1 also contains valve 3 8 and a three-way pipe 9. Valve 3 8 is arranged vertically, and the scale pan 2 is provided with a clearance hole 2a for the upper end of valve 3 8 to extend. 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 connected to the lower ends of valve 2 5 and valve 3 8, respectively.

[0027] This electronic scale can be used for quantitative refrigerant filling or quantitative recovery. The following describes the use of this electronic scale in quantitative filling mode:

[0028] When a large tank of refrigerant is used, the refrigerant tank is placed on the scale plate 2 and connected to the valve nozzle 2 5 through a pipe fitting. The refrigerant enters the device to be injected with refrigerant through the valve nozzle 2 5, the three-way pipe fitting 9, the solenoid valve 3, and the valve nozzle 1 4. The weight of the refrigerant tank is detected by weighing to determine the refrigerant filling amount. When the set refrigerant filling amount is reached, the solenoid valve 3 is closed to cut off the refrigerant delivery, thereby realizing the quantitative delivery of refrigerant.

[0029] When a small bottle of refrigerant is used, the refrigerant bottle is directly screwed onto valve nozzle 3 8 and pressed onto the weighing pan 2. The refrigerant enters the equipment to be injected with refrigerant through valve nozzle 3 8, three-way pipe fitting 9, solenoid valve 3, and valve nozzle 1 4. The weight of the refrigerant bottle is detected by weighing to determine the refrigerant filling amount. When the set refrigerant filling amount is reached, the solenoid valve 3 is closed to cut off the refrigerant delivery, thereby realizing quantitative delivery of the refrigerant.

[0030] With the cooperation of the second valve mouth 5, the third valve mouth 8, the three-way pipe fitting 9 and other components, the electronic scale can be used with both large tanks of refrigerant and small bottles of refrigerant, thereby effectively expanding the scope of use of the electronic scale. The electronic scale has the advantages of being easy to use and having good practicality.

[0031] It is further explained that the valve nozzle 3 8 is set close to the edge of the scale pan 2. Under the premise of meeting the weighing requirements, the area occupied by the valve nozzle 3 8 in the middle position of the scale pan 2 can be effectively reduced, so as to stably accommodate large tanks of refrigerant without changing the size of the scale pan 2, so that the size of the electronic scale remains small.

[0032] In this embodiment,

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

[0034] like Figure 2 and Figure 3 As shown, the connection between the tee pipe fitting 9 and the second and third valves is as follows: Two connecting blocks 10 are fixed within the housing 1, and the second and third valves 5 and 8 are respectively fixed to the two connecting blocks 10. The connecting blocks 10 are provided with strip-shaped flow channels 10a. The second and third valves 5 and 8 respectively communicate with the tee pipe fitting 9 through corresponding strip-shaped flow channels 10a. This design has the advantages of simple structure and easy installation. Preferably, the second and third valves 5 and 8 are positioned side by side to facilitate the arrangement of the tee pipe fitting 9.

[0035] In the actual product, a rubber pad 11 is laid flat on the scale pan 2 , and an insertion hole is vertically passed through the rubber pad 11 and arranged opposite to the concave cavity 2 a 1 , and the diameter of the insertion hole is larger than the diameter of the concave cavity 2 a 1 .

[0036] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Claims

1. A refrigerant electronic scale, comprising a housing (1) and a scale plate (2) arranged horizontally on the housing (1), wherein a solenoid valve (3), a valve nozzle 1 (4) and a valve nozzle 2 (5) are arranged in the housing (1), the valve nozzle 1 (4) and the valve nozzle 2 (5) are both arranged vertically and the upper ends of both extend out of the housing (1), the lower end of the valve nozzle 1 (4) is connected to one end of the solenoid valve (3), and the invention is characterized in that: The housing (1) is further provided with a valve nozzle 3 (8) and a three-way pipe fitting (9); the valve nozzle 3 (8) is vertically arranged, and a clearance hole (2a) extending from the upper end of the valve nozzle 3 (8) is provided on the scale plate (2); one end of the three-way pipe fitting (9) is connected to the other end of the solenoid valve (3), and the other two ends of the three-way pipe fitting (9) are respectively connected to the lower end of the valve nozzle 2 (5) and the lower end of the valve nozzle 3 (8).

2. The refrigerant electronic scale according to claim 1, characterized in that: The above-mentioned valve nozzle three (8) is set close to 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), and 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 above-mentioned clearance hole (2a), and an annular gap exists between the inner wall of the concave cavity (2a1) and the outer wall of the second valve (5).

4. The refrigerant electronic scale according to claim 1, 2 or 3, characterized in that: Two connecting blocks (10) are fixed in the housing (1), and the second valve (5) and the third valve (8) are fixed on the two connecting blocks (10), respectively. A strip flow channel is provided in the connecting block (10), and the second valve (5) and the third valve (8) are connected to the three-way pipe fitting (9) by using the corresponding strip flow channel (10a).

5. The refrigerant electronic scale according to claim 4, characterized in that: The second valve (5) and the third valve (8) are arranged in parallel.

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