Positive pressure type anti-explosion refrigeration structure

Abstract

The utility model relates to the technical field of air conditioners, in particular to a positive pressure type anti-explosion refrigeration structure which comprises a machine body, the machine body comprises a compressor, the surface of the compressor is fixedly connected with a condenser through a pipeline, and the surface of the condenser is connected with a filter. When the system operates, refrigerant gas can stably flow in the pipeline, the high pressure and the low pressure in front of and behind the compressor can be detected respectively through the arrangement of the low-pressure protection switch and the high-pressure protection switch, and then it can be guaranteed that the system operates within a reasonable pressure range; meanwhile, the low-voltage protection switches and the high-voltage protection switches are arranged in two groups, so that the two groups of high-voltage protection switches and the two groups of high-voltage protection switches can be mutually standby, and when one of the low-voltage protection switches or the high-voltage protection switches breaks down, the system pressure detection is not influenced, so that the internal pressure of the system is higher than the external pressure of the system; and positive pressure in the structure can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning, in particular to a positive pressure explosion-proof refrigeration structure. Background Art

[0002] An air conditioning and refrigeration system uses external energy to transfer heat from a lower-temperature substance (or environment) to a higher-temperature substance (or environment). This system primarily consists of a refrigerant and four major components: a compressor, evaporator, expansion valve, and condenser. 1 These components are connected by pipes to form a closed system. The refrigerant circulates within the system, exchanging heat with the outside world through processes such as compression, condensation, throttling, and evaporation, thereby achieving cooling. A positive-pressure system involves the condenser, evaporator, compressor, expansion valve, and high- and low-pressure switches. The system uses an inert or non-flammable gas. During operation, the refrigerant gas circulates, maintaining an internal pressure higher than the external pressure. This creates a positive-pressure explosion-proof system, ensuring electrical safety in flammable and explosive environments.

[0003] In the prior art, when the positive pressure system is operating, the refrigerant gas will flow steadily in the pipeline. In order to ensure the pressure of the system, high and low pressure switches are usually set on the system to detect the high and low pressures before and after the compressor through the high and low pressure switches. However, due to long-term use, the high and low pressure switches may malfunction, and the malfunction will affect the system pressure detection, and it is impossible to ensure that the system operates within a reasonable pressure range. Therefore, in order to solve the above problems, a positive pressure explosion-proof refrigeration structure is proposed. Utility Model Content

[0004] The purpose of the present utility model is to provide a positive pressure explosion-proof refrigeration structure to solve the problem mentioned in the above background technology that the high and low pressure switches may malfunction during long-term use, and the malfunction will affect the system pressure detection, and it is impossible to ensure that the system operates within a reasonable pressure range.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a positive pressure explosion-proof refrigeration structure, comprising a body, the body comprising a compressor, a condenser fixedly connected to the surface of the compressor via a pipe, a filter connected to the surface of the condenser, a liquid reservoir connected to the surface of the filter, an evaporator connected to the surface of the liquid reservoir, and a gas-liquid separator connected to the surface of the evaporator;

[0006] An expansion valve is provided on the surface of the liquid storage device, a low-pressure protection switch is installed on the pipeline, and a high-pressure protection switch is installed on the pipeline.

[0007] Preferably, the end of the condenser away from the compressor is fixedly connected to the filter through a pipe, the end of the filter away from the condenser is fixedly connected to the liquid reservoir through a pipe, and the end of the liquid reservoir away from the filter is fixedly connected to the evaporator through a pipe.

[0008] Preferably, one end of the evaporator away from the liquid reservoir is fixedly connected to the gas-liquid separator through a pipeline, and one end of the gas-liquid separator away from the evaporator is fixedly connected to the compressor through a pipeline.

[0009] Preferably, the expansion valve is fixedly mounted on a pipeline, and the expansion valve is connected to the liquid reservoir and the evaporator through the pipeline.

[0010] Preferably, the low-pressure protection switches are fixedly installed on the pipeline in two groups, and both are connected to the gas-liquid separator and the compressor through the pipeline.

[0011] Preferably, the high-pressure protection switches are fixedly installed on the pipeline in two groups, and the two groups of high-pressure protection switches are connected to the compressor and the condenser through the pipeline.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] When the system is running, the refrigerant gas will flow steadily in the pipeline. Through the setting of the low-pressure protection switch and the high-pressure protection switch, the high and low pressures before and after the compressor can be detected respectively, thereby ensuring that the system operates within a reasonable pressure range. At the same time, the low-pressure protection switch and the high-pressure protection switch are set in pairs, so that the two groups of high-pressure protection switches and high-pressure protection switches can serve as backup for each other. When one of the low-pressure protection switches or the high-pressure protection switches fails, it will not affect the system pressure detection, thereby ensuring that the internal pressure of the system is higher than the external pressure of the system, and achieving positive pressure inside the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure flow of the utility model;

[0015] In the figure: 1. Compressor; 11. Condenser; 12. Filter; 13. Liquid receiver; 14. Evaporator; 15. Gas-liquid separator; 16. Expansion valve; 17. Low-pressure protection switch; 18. High-pressure protection switch. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] See also Figure 1 , an embodiment provided by the utility model:

[0018] A positive pressure explosion-proof refrigeration structure includes a body, which includes a compressor 1. The surface of the compressor 1 is fixedly connected to a condenser 11 through a pipeline. The surface of the condenser 11 is connected to a filter 12. The surface of the filter 12 is connected to a liquid reservoir 13. The surface of the liquid reservoir 13 is connected to an evaporator 14. The surface of the evaporator 14 is connected to a gas-liquid separator 15. When the system is running, the refrigerant gas will flow stably in the pipeline, keeping the internal pressure of the system higher than the external pressure, which can achieve a positive pressure explosion-proof effect, thereby ensuring electrical operation safety in flammable and explosive places. The system operation process is: compressor 1-condenser 11-filter 12-liquid reservoir 13-expansion valve 16-evaporator 14-gas-liquid separator 15-compressor 1;

[0019] An expansion valve 16 is provided on the surface of the liquid storage tank 13, a low-pressure protection switch 17 is installed on the pipeline, and a high-pressure protection switch 18 is installed on the pipeline. Through the setting of the low-pressure protection switch 17 and the high-pressure protection switch 18, the high and low pressures before and after the compressor 1 can be detected respectively.

[0020] Furthermore, the end of the condenser 11 away from the compressor 1 is fixedly connected to the filter 12 through a pipe, the end of the filter 12 away from the condenser 11 is fixedly connected to the liquid reservoir 13 through a pipe, and the end of the liquid reservoir 13 away from the filter 12 is fixedly connected to the evaporator 14 through a pipe. The setting of the filter 12 can remove impurities and moisture in the refrigerant, prevent these impurities from clogging the system, ensure the purity of the refrigerant, and thus maintain the normal operation of the system.

[0021] Furthermore, one end of the evaporator 14 away from the liquid reservoir 13 is fixedly connected to the gas-liquid separator 15 through a pipeline, and one end of the gas-liquid separator 15 away from the evaporator 14 is fixedly connected to the compressor 1 through a pipeline. The gas-liquid separator 15 can separate the high-pressure liquid refrigerant coming out of the evaporator 14 and the gas that may be accompanied by it, ensuring that the liquid refrigerant enters the liquid reservoir 13 and the gas returns to the compressor 1, which can prevent the liquid from entering the compressor 1 and causing liquid hammer.

[0022] Furthermore, the expansion valve 16 is fixedly installed on the pipeline, and the expansion valve 16 is connected to the liquid reservoir 13 and the evaporator 14 through the pipeline. Through the setting of the expansion valve 16, the pressure can be throttled and the refrigerant flow can be adjusted, which can ensure that the refrigerant evaporates at a suitable pressure and temperature in the condenser 11 to achieve a cooling effect.

[0023] Furthermore, the low-pressure protection switch 17 is fixedly installed on the pipeline in two groups, and both are connected to the gas-liquid separator 15 and the compressor 1 through the pipeline. Through the setting of the low-pressure protection switch 17, the problem of inconsistent pressure detection before and after can be avoided. At the same time, they can still serve as backup for each other, thereby ensuring the reasonable pressure of the system, achieving the internal pressure of the system higher than the external pressure of the system, and achieving positive pressure inside the structure.

[0024] Furthermore, the high-pressure protection switch 18 is fixedly installed on the pipeline in two groups. Both groups of high-pressure protection switches 18 are connected to the compressor 1 and the condenser 11 through pipelines. Through the setting of the high-pressure protection switch 18, the pressure after the compressor 1 can be detected, thereby ensuring that the system operates within a reasonable pressure range.

[0025] Working principle: When in use and the system is running, the refrigerant gas will flow steadily in the pipeline. The operation process is: compressor 1-condenser 11-filter 12-liquid reservoir 13-expansion valve 16-evaporator 14-gas-liquid separator 15-compressor 1. The low-pressure protection switch 17 and the high-pressure protection switch 18 respectively detect the high pressure and low pressure before and after the compressor 1. Dual low-pressure protection switches 17 and dual high-pressure protection switches 18 are used. The two sets of low-pressure protection switches 17 and high-pressure protection switches 18 can serve as backup for each other. When one of the low-pressure protection switches 17 or the high-pressure protection switch 18 fails, it will not affect the system pressure detection, and can ensure that the system operates within a reasonable pressure range, thereby ensuring that the internal pressure of the system is higher than the external pressure of the system, and realizing positive pressure inside the structure.

[0026] The above are only preferred embodiments of the present invention and do not constitute any form of limitation to the present invention. Any ordinary technician in this industry can smoothly implement the present invention as shown in the drawings and above. However, any equivalent changes, modifications and evolutions made by technicians familiar with this profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the scope of protection of the technical solution of the present invention.

Claims

1. A positive pressure explosion-proof refrigeration structure, comprising a body, the body comprising a compressor (1), the surface of the compressor (1) being fixedly connected to a condenser (11) via a pipe, the surface of the condenser (11) being connected to a filter (12), the surface of the filter (12) being connected to a liquid reservoir (13), the surface of the liquid reservoir (13) being connected to an evaporator (14), and the surface of the evaporator (14) being connected to a gas-liquid separator (15); It is characterized in that An expansion valve (16) is provided on the surface of the liquid storage container (13), a low-pressure protection switch (17) is installed on the pipeline, and a high-pressure protection switch (18) is installed on the pipeline.

2. A positive pressure explosion-proof refrigeration structure according to claim 1, characterized in that: One end of the condenser (11) away from the compressor (1) is fixedly connected to the filter (12) via a pipe, one end of the filter (12) away from the condenser (11) is fixedly connected to the liquid reservoir (13) via a pipe, and one end of the liquid reservoir (13) away from the filter (12) is fixedly connected to the evaporator (14) via a pipe.

3. The positive pressure explosion-proof refrigeration structure according to claim 1, characterized in that: One end of the evaporator (14) away from the liquid storage device (13) is fixedly connected to the gas-liquid separator (15) via a pipeline, and one end of the gas-liquid separator (15) away from the evaporator (14) is fixedly connected to the compressor (1) via a pipeline.

4. The positive pressure explosion-proof refrigeration structure according to claim 1, characterized in that: The expansion valve (16) is fixedly mounted on the pipeline, and the expansion valve (16) is connected to the liquid reservoir (13) and the evaporator (14) through the pipeline.

5. The positive pressure explosion-proof refrigeration structure according to claim 1, characterized in that: The low-pressure protection switches (17) are fixedly installed on the pipeline in two groups, and are both connected to the gas-liquid separator (15) and the compressor (1) through the pipeline.

6. The positive pressure explosion-proof refrigeration structure according to claim 1, characterized in that: The high-pressure protection switches (18) are fixedly installed on the pipeline in two groups, and the two groups of high-pressure protection switches (18) are connected to the compressor (1) and the condenser (11) through the pipeline.

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