Electronic expansion valve module for fluorine air conditioner

Abstract

The utility model discloses an electronic expansion valve module for a fluorine machine air conditioner, which belongs to the technical field of air conditioners and comprises a plate heat exchanger, an electronic expansion valve, a first one-way valve, a second one-way valve, a third one-way valve, a fourth one-way valve and a bypass pipeline. The other end of the electronic expansion valve is connected to a node A through a pipeline, the first one-way valve, the second one-way valve, the third one-way valve and the fourth one-way valve are connected in series, the first one-way valve and the second one-way valve are consistent in conduction direction, and the third one-way valve and the fourth one-way valve are consistent in conduction direction. The bypass pipeline is connected in parallel with a pipeline which is formed by connecting the first one-way valve, the second one-way valve, the third one-way valve and the fourth one-way valve in series, the node C is connected with the pipeline to be connected into an air conditioner liquid pipe, and a node D is arranged between the first one-way valve and the second one-way valve and connected with the pipeline to be connected into an air conditioner.

Description

Technical Field

[0001] The utility model belongs to the technical field of air conditioners, and in particular relates to an electronic expansion valve module for a fluorine machine air conditioner. Background Art

[0002] For existing fluorine air conditioners, the compressor compresses the refrigerant and then discharges the high-temperature and high-pressure gas to the condenser for condensation, which is then throttled through a capillary tube or an electronic expansion valve and enters the evaporator for evaporation. The evaporated gaseous refrigerant returns to the suction side of the compressor, thus completing a refrigeration cycle. When the indoor unit is installed 50-90m higher than the outdoor unit, there are problems such as high system pressure drop, affected cooling and heating effects, and refrigerant flow noise affecting user experience. Utility Model Content

[0003] In order to solve the problems raised in the above background technology, the utility model provides an electronic expansion valve module for a fluorine machine air conditioner.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an electronic expansion valve module for a fluorine machine air conditioner, comprising a plate heat exchanger, an electronic expansion valve, a first one-way valve, a second one-way valve, a third one-way valve, a fourth one-way valve, and a bypass pipeline, wherein the first port of the plate heat exchanger is connected to the gas-liquid separator of the air conditioner through a pipeline, the second port is connected to the electronic expansion valve through a pipeline, the other end of the electronic expansion valve is connected to a node A between the second one-way valve and the third one-way valve through a pipeline, the first one-way valve, the second one-way valve, the third one-way valve, and the fourth one-way valve are connected in series, and the first one-way valve and The conduction direction of the second one-way valve is consistent, and the conduction directions of the third one-way valve and the fourth one-way valve are consistent. The bypass pipeline is connected in parallel with the pipeline connected in series with the first one-way valve, the second one-way valve, the third one-way valve, and the fourth one-way valve and has a node B. The third port of the plate heat exchanger is connected to the node B, and the fourth port of the plate heat exchanger is connected to the node A. There is a node C between the third one-way valve and the fourth one-way valve, and the connecting pipeline at the node C is connected to the air conditioner liquid pipe. There is a node D between the first one-way valve and the second one-way valve, and the connecting pipeline at the node D is connected to the outdoor heat exchanger and the gas-liquid separator of the air conditioner.

[0005] Preferably, it also includes a temperature sensor THO-SC, which is arranged on the pipeline between the node C and the air conditioner liquid pipe.

[0006] Preferably, it also includes a temperature sensor THO-H, which is arranged on the pipeline at the outlet of the first port of the plate heat exchanger.

[0007] Preferably, it further comprises a first filter, wherein the first filter is arranged between the node C and the liquid pipe.

[0008] Preferably, the device further comprises a second filter, wherein the second filter is arranged between the electronic expansion valve and the node A.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] First, when the indoor unit is installed 50-90m higher than the outdoor unit, in cooling and heating modes, the structure of the present invention can cool the refrigerant that has been overcooled from the condenser again at the same compressor frequency due to the plate heat exchanger, and increase the overcooling degree of the refrigerant input to the evaporation side again, thereby reducing the system pressure drop and improving the mass flow of the entire refrigeration cycle system, thereby ensuring the cooling and heating effects;

[0011] Second, for multi-split air conditioning systems, when cooling, the indoor unit is prone to refrigerant flow noise, which affects the customer's use effect. By supercooling the refrigerant flowing out of the outdoor heat exchanger again, it can be ensured that under the same mass flow, the amount of flash gas refrigerant generated after the throttling of the indoor unit's electronic expansion valve is small. The density of the refrigerant after supercooling increases, and the volume is small under the same mass flow, avoiding various refrigerant noises caused by the sudden expansion of the gaseous refrigerant volume;

[0012] Third, in the heating mode, the structure of the present invention can also ensure the subcooling degree of the refrigerant entering the outdoor heat exchange, thereby improving the diversion effect at the distributor of the outdoor heat exchange and improving the heat exchange capacity of the outdoor heat exchange;

[0013] Fourth, because the structural form of the present invention connects the high and low pressure sides of the refrigerant system, this structure also has the effect of reducing the high pressure of the system and increasing the low pressure of the system, thereby avoiding the refrigerant system from shutting down due to high pressure protection during high-temperature cooling, and avoiding damage to the compressor due to low pressure during low-temperature heating of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural diagram of the electronic expansion valve module of the utility model;

[0015] Figure 2 This is a schematic diagram of the application of the electronic expansion valve module of the utility model.

[0016] In the figure: plate heat exchanger 1, electronic expansion valve 2, first one-way valve 3, second one-way valve 4, third one-way valve 5, fourth one-way valve 6, bypass line 7, temperature sensor THO-SC8, temperature sensor THO-H9, first filter 10, second filter 11. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1-2 The utility model provides the following technical solutions: an electronic expansion valve module for a fluorine machine air conditioner, comprising a plate heat exchanger 1, an electronic expansion valve 2, a first one-way valve 3, a second one-way valve 4, a third one-way valve 5, a fourth one-way valve 6, and a bypass pipeline 7, wherein the first port of the plate heat exchanger 1 is connected to the gas-liquid separator of the air conditioner through a pipeline, the second port is connected to the electronic expansion valve 2 through a pipeline, the other end of the electronic expansion valve 2 is connected to a node A between the second one-way valve 4 and the third one-way valve 5 through a pipeline, the first one-way valve 3, the second one-way valve 4, the third one-way valve 5, and the fourth one-way valve 6 are connected in series, and the first one-way valve 3 and the second one-way valve 4 are connected in series. The conduction directions of the one-way valves 4 are consistent, and the conduction directions of the third one-way valve 5 and the fourth one-way valve 6 are consistent. The bypass pipeline 7 is connected in parallel with the pipeline in series with the first one-way valve 3, the second one-way valve 4, the third one-way valve 5, and the fourth one-way valve 6 and has a node B. The third port of the plate heat exchanger 1 is connected to the node B, and the fourth port of the plate heat exchanger 1 is connected to the node A. There is a node C between the third one-way valve 5 and the fourth one-way valve 6, and the connecting pipeline at the node C is connected to the air conditioner liquid pipe. There is a node D between the first one-way valve 3 and the second one-way valve 4, and the connecting pipeline at the node D is connected to the outdoor heat exchanger and the gas-liquid separator of the air conditioner. The flow path between the third port and the fourth port of the plate heat exchanger 1 is the main flow path, and the flow path between the first port and the second port is the bypass flow path. The bypass flow path is used to exchange heat with the main flow refrigerant to increase the supercooling of the main flow. The electronic expansion valve 2 is used for throttling the bypass flow path. After throttling the high-pressure and medium-temperature refrigerant in the bypass flow path, it becomes a low-temperature and low-pressure refrigerant, and then exchanges heat with the main flow refrigerant to increase the supercooling of the main flow refrigerant. The electronic expansion valve 2 is an electronic expansion valve with a valve diameter of 1.5-2.4mm and an adjustable valve step number of 0-470 steps. The plate heat exchanger 1 is a heat exchanger with a heat exchange capacity of 16KW when the main circulation flow rate is 0.5kg / s and the bypass flow rate is 0.1kg / s during the refrigeration cycle.

[0019] As a preferred implementation of this embodiment, a temperature sensor THO-SC8 is further included, and the temperature sensor THO-SC8 is arranged on the pipeline between the node C and the air conditioner liquid pipe. The temperature sensor THO-SC8 is used for adjusting the number of steps of other electronic expansion valves in the system.

[0020] As a preferred implementation of this embodiment, a temperature sensor THO-H9 is further included, and the temperature sensor THO-H9 is arranged on the pipeline at the outlet of the first port of the plate heat exchanger 1. The temperature sensor THO-H9 is used to indirectly detect the temperature of the refrigerant in the copper tube as a parameter for adjusting the number of steps of the electronic expansion valve 2.

[0021] As a preferred implementation of this embodiment, it also includes a first filter 10, which is arranged between node C and the liquid pipe. It also includes a second filter 11, which is arranged between the electronic expansion valve 2 and node A. The second filter 11 and the first filter 10 are used to filter the refrigerant passing through the plate heat exchanger 1 and the electronic expansion valve 2, respectively, to avoid the refrigerant system from failing to work properly due to blockage, wherein the first filter 10 has an outer diameter of 30 mm, a wall thickness of 1.2 mm, a constriction at both ends, and a copper tube with a mesh size of 100. The second filter 11 has an outer diameter of 19.05 mm, a wall thickness of 1.0 mm, and a copper tube with a mesh size of 100.

[0022] The pipes used for connecting the plate heat exchanger 1, the electronic expansion valve 2, the first one-way valve 3, the second one-way valve 4, the third one-way valve 5, the fourth one-way valve 6, etc. mentioned in this embodiment are all copper pipes with an outer diameter of 6.35-12.7 mm and a wall thickness of 0.8 mm.

[0023] In the cooling and heating cycle, the flow path of the electronic expansion valve 2 is shown in detail. Figure 2 , because there are 4 one-way valve components, the main circulation direction of the electronic expansion valve 2 can be the same, the refrigeration cycle process is shown as a solid arrow line, and the heating cycle is shown as a dotted arrow line. During the heating cycle, the refrigerant enters the electronic expansion valve module of this embodiment from the indoor unit through the liquid pipe, and the refrigerant flows through the first filter 10, the fourth one-way valve 6, the bypass pipeline 7, the plate heat exchanger 1, the second one-way valve 4, and the first one-way valve 3 and then enters the outdoor unit. At the same time, the refrigerant of the gas-liquid separator in the outdoor unit enters the bypass flow path of the plate heat exchanger 1 and exchanges heat with the main flow refrigerant. During the refrigeration cycle, the refrigerant enters the indoor unit from the outdoor unit through the first one-way valve 3, the plate heat exchanger 1, the third one-way valve 5, the first filter 10, and the liquid pipe. At the same time, the refrigerant of the gas-liquid separator enters the plate heat exchanger 1 to exchange heat with the main flow, and the refrigerant after heat exchange enters the indoor unit together with the main flow refrigerant.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electronic expansion valve module for a fluorine machine air conditioner, characterized in that: The invention comprises a plate heat exchanger, an electronic expansion valve, a first one-way valve, a second one-way valve, a third one-way valve, a fourth one-way valve, and a bypass pipeline, wherein the first port of the plate heat exchanger is connected to the gas-liquid separator of the air conditioner through a pipeline, the second port is connected to the electronic expansion valve through a pipeline, the other end of the electronic expansion valve is connected to the node A between the second one-way valve and the third one-way valve through a pipeline, the first one-way valve, the second one-way valve, the third one-way valve, and the fourth one-way valve are connected in series, and the conduction directions of the first one-way valve and the second one-way valve are consistent, and the third one-way valve and The conduction direction of the fourth one-way valve is consistent. The bypass pipeline is connected in parallel with the pipeline connected in series with the first one-way valve, the second one-way valve, the third one-way valve, and the fourth one-way valve and has a node B. The third port of the plate heat exchanger is connected to the node B, and the fourth port of the plate heat exchanger is connected to the node A. There is a node C between the third one-way valve and the fourth one-way valve. The connecting pipeline at the node C is connected to the liquid pipe of the air conditioner. There is a node D between the first one-way valve and the second one-way valve. The connecting pipeline at the node D is connected to the outdoor heat exchanger and the gas-liquid separator of the air conditioner.

2. The electronic expansion valve module for fluorine machine air conditioner according to claim 1, characterized in that: It also includes a temperature sensor THO-SC, which is arranged on the pipeline between the node C and the air conditioner liquid pipe.

3. The electronic expansion valve module for fluorine machine air conditioner according to claim 1, characterized in that: It also includes a temperature sensor THO-H, which is arranged on the pipeline at the outlet of the first port of the plate heat exchanger.

4. The electronic expansion valve module for fluorine machine air conditioner according to claim 1, characterized in that: The system further includes a first filter, wherein the first filter is disposed between the node C and the liquid pipe.

5. The electronic expansion valve module for fluorine machine air conditioner according to claim 1, characterized in that: The system further includes a second filter, wherein the second filter is disposed between the electronic expansion valve and the node A.

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