Energy-saving air conditioning system and control device

Abstract

The utility model discloses an energy-saving air-conditioning system and a control device, and relates to the field of energy-saving air-conditioning systems, the energy-saving air-conditioning system comprises an evaporation box, a capillary main pipe and an expansion valve, the capillary main pipe is connected with the expansion valve, the expansion valve is connected with the evaporation box, and one end of the capillary main pipe far away from the expansion valve is connected to an outlet of the evaporation box. The capillary main pipe comprises a built-in capillary tube, a heat preservation cotton layer and a metal layer, the heat preservation cotton layer is wound and fixed to the outer ring of the built-in capillary tube, and the metal layer is fixedly arranged on the outer ring of the heat preservation cotton layer in a sleeving mode; based on the arrangement of the auxiliary capillary tube, the main capillary tube, the first cavity, the auxiliary capillary tube, the fourth cavity, the third cavity and the evaporation box form a relatively closed-loop refrigerant circulating system, so that a refrigerant at an outlet of the evaporation box can enter the first cavity through the main capillary tube in time, and the phenomenon of control delay is avoided.

Description

Technical Field

[0001] This utility model relates to the field of energy-saving air conditioning system technology, specifically to an energy-saving air conditioning system and control device. Background Technology

[0002] The expansion valve in the existing air conditioning system has certain defects in use. Because the original first chamber is only connected to the capillary tube, which is a relatively sealed chamber, the refrigerant at the evaporator outlet is not easy to actively flow into the first chamber through the capillary tube in a timely manner, regardless of whether the temperature is too low or too high. Therefore, the air conditioning system controlled by this expansion valve has a control delay problem and limited energy saving effect. To solve this problem, we provide an energy-saving air conditioning system and control device. Utility Model Content

[0003] To address the problems existing in the prior art, this utility model provides an energy-saving air conditioning system and control device. Based on the setting of the auxiliary capillary tube, the capillary tube, the first chamber, the auxiliary capillary tube, the fourth chamber, the third chamber, and the evaporator form a relatively closed-loop refrigerant circulation system. In this way, the refrigerant at the outlet of the evaporator can enter the first chamber in a timely manner through the capillary tube without any control delay.

[0004] To achieve the above objectives, this utility model employs an energy-saving air conditioning system, comprising an evaporator, a capillary tube, and an expansion valve. The capillary tube is connected to the expansion valve, and the expansion valve is connected to the evaporator. The end of the capillary tube furthest from the expansion valve is connected to the outlet of the evaporator. The capillary tube includes an internal capillary tube, a thermal insulation layer, and a metal layer. The thermal insulation layer is wound and fixed around the outer ring of the internal capillary tube, and the metal layer is fixedly sleeved on the outer ring of the thermal insulation layer.

[0005] This utility model also discloses a control device for an energy-saving air conditioning system, applicable to the energy-saving air conditioning system described in the claims. The expansion valve includes an upper expansion valve housing and a lower expansion valve housing. The lower expansion valve housing is integrally disposed below the upper expansion valve housing. A partition is fixedly disposed inside the upper expansion valve housing. A rectangular groove is disposed in the middle of the partition. The partition divides the interior of the upper expansion valve housing into a first chamber and a second chamber distributed vertically. One end of the capillary tube is connected to the upper end of the first chamber, and the other end of the capillary tube is connected to the outlet of the evaporator. A diaphragm is disposed above the rectangular groove, and a fixed part is disposed at the bottom of the diaphragm. A spring is supported on the bottom surface of the second chamber. A valve stem is fixedly connected to the middle of the lower surface of the diaphragm. The valve stem extends movably into the interior of the lower housing of the expansion valve. A stop is fixedly installed in the middle of the interior of the lower housing of the expansion valve. A circular hole is provided in the middle of the stop for the lower end of the valve stem to pass through. The stop divides the interior of the lower housing of the expansion valve into a third chamber and a fourth chamber distributed vertically. The bottom surface of the stop is a circular groove structure with an upward convex shape. A valve core is fixedly installed at the end of the valve stem that extends into the interior of the fourth chamber. A refrigerant inlet pipe is connected to the lower end of the fourth chamber. The inlet of the evaporator is connected to one side of the third chamber.

[0006] As a further optimization of the above solution, the diaphragm has elastic deformation capability.

[0007] As a further optimization of the above scheme, an auxiliary capillary tube is provided on one side of the upper housing of the expansion valve, and the end of the auxiliary capillary tube away from the upper housing of the expansion valve is connected to the interior of the fourth chamber.

[0008] As a further optimization of the above scheme, a one-way valve is also provided on the auxiliary capillary tube, which controls the refrigerant to flow unidirectionally into the fourth chamber through the auxiliary capillary tube.

[0009] The energy-saving air conditioning system and control device of this utility model have the following beneficial effects:

[0010] This utility model discloses an energy-saving air conditioning system and control device. Based on the setting of the auxiliary capillary tube, the capillary tube, the first chamber, the auxiliary capillary tube, the fourth chamber, the third chamber, and the evaporator form a relatively closed-loop refrigerant circulation system. In this way, the refrigerant at the outlet of the evaporator can enter the first chamber in time through the capillary tube without the phenomenon of control delay.

[0011] This utility model provides an energy-saving air conditioning system and control device, and based on the setting of a one-way valve, the refrigerant in the auxiliary capillary tube flows unidirectionally into the fourth chamber, and there will be no backflow of refrigerant entering the fourth chamber.

[0012] This utility model discloses an energy-saving air conditioning system and control device. Both the main capillary tube and the auxiliary capillary tube include an internal capillary tube, an insulation cotton layer, and a metal layer. The insulation cotton layer is wound and fixed around the outer ring of the internal capillary tube, and the metal layer is fixedly sleeved on the outer ring of the insulation cotton layer. The insulation cotton layer has a heat preservation effect and also a buffering effect, thus avoiding the phenomenon that the external temperature affects the refrigerant temperature in the main capillary tube or the auxiliary capillary tube.

[0013] Referring to the following description and accompanying drawings, specific embodiments of the present invention are disclosed in detail, indicating how the principles of the present invention can be adopted. It should be understood that the embodiments of the present invention are not limited in scope as a result, and within the spirit and scope of the appended claims, the embodiments of the present invention include many changes, modifications and equivalents. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the control device structure of the energy-saving air conditioning system of this utility model;

[0015] Figure 2 This is a schematic diagram of the capillary structure of this utility model.

[0016] In the diagram: 1. Evaporator; 2. Capillary tube; 3. Upper housing of expansion valve; 4. Rectangular groove; 5. Valve stem; 6. Third chamber; 7. Baffle; 8. Fourth chamber; 9. First chamber; 10. Diaphragm; 11. Spring; 12. Second chamber; 13. Auxiliary capillary tube; 14. Round hole; 15. Valve core; 16. Lower housing of expansion valve; 17. Check valve; 18. Refrigerant inlet pipe; 201. Built-in capillary tube; 202. Insulation layer; 203. Metal layer. Detailed Implementation

[0017] Please refer to the instruction manual appendix. Figure 1-2This utility model provides a technical solution: an energy-saving air conditioning system, including an expansion valve and an evaporator 1. The expansion valve is connected to the evaporator and is used to control the amount of refrigerant entering the evaporator. Existing expansion valve control devices typically include a capillary tube 2, an upper expansion valve housing 3, and a lower expansion valve housing 16. The lower expansion valve housing 16 is integrally disposed below the upper expansion valve housing 3. A partition is fixedly disposed inside the upper expansion valve housing 3, and a rectangular groove 4 is provided in the middle of the partition. The partition divides the interior of the upper expansion valve housing 3 into a first chamber 9 and a second chamber 12 distributed vertically. One end of the capillary tube 2 is connected to the upper end of the first chamber 9, and the other end of the capillary tube 2 is connected to the outlet of the evaporator 1. An elastically deformable [feature / structure] is provided above the rectangular groove 4. A diaphragm 10 is provided, and a spring 11 is fixedly installed at the bottom of the diaphragm 10. The spring 11 is supported on the bottom surface of the second chamber 12. A valve stem 5 is also fixedly connected to the middle of the lower surface of the diaphragm 10. The valve stem 5 extends into the interior of the lower housing 16 of the expansion valve. A stop block 7 is fixedly installed in the middle of the interior of the lower housing 16 of the expansion valve. A circular hole 14 is provided in the middle of the stop block 7 for the lower end of the valve stem 5 to pass through. The stop block 7 divides the interior of the lower housing 16 of the expansion valve into a third chamber 6 and a fourth chamber 8 distributed vertically. The bottom surface of the stop block 7 is a circular groove structure with an upward protrusion. A valve core 15 is fixedly installed at one end of the valve stem 5 that extends into the interior of the fourth chamber 8. A refrigerant inlet pipe 18 is connected to the lower end of the fourth chamber 8. The inlet of the evaporator 1 is connected to one side of the third chamber 6.

[0018] During operation, the refrigerant enters the fourth chamber 8 through the refrigerant inlet pipe 18. The refrigerant in the fourth chamber 8 enters the interior of the third chamber 6 through the opening between the valve core 15 and the bottom surface of the baffle 7 and the round hole 14. The refrigerant in the third chamber 6 enters the evaporator 1, and the external heat dissipation device blows on the surface of the evaporator 1, thereby achieving cooling.

[0019] If the refrigerant temperature at the outlet of evaporator 1 is too low, the refrigerant with a lower temperature will enter the interior of the first chamber 9 through the capillary tube 2, resulting in an overall low temperature of the refrigerant in the first chamber 9. At this time, the interior of the first chamber 9 is in a low-pressure state. The diaphragm 10 rises due to the supporting force of the spring 11, thereby driving the valve stem 5 and the valve core 15 to rise. When the valve core 15 rises, the opening between the valve core 15 and the bottom surface of the baffle 7 becomes smaller, resulting in a smaller flow rate of refrigerant through this opening, achieving the purpose of throttling and preventing a large amount of refrigerant from flowing into the evaporator 1 when the refrigerant temperature at the outlet of evaporator 1 is too low.

[0020] Similarly, when the refrigerant temperature at the outlet of the evaporator 1 is too high, the refrigerant with a higher temperature enters the interior of the first chamber 9 through the capillary tube 2, causing the overall temperature of the refrigerant in the first chamber 9 to be too high. At this time, the interior of the first chamber 9 is under high pressure. The diaphragm 10 is pushed down by the refrigerant under high pressure, thereby compressing the spring 11, causing the valve stem 5 and the valve core 15 to descend. When the valve core 15 descends, the opening between the valve core 15 and the bottom surface of the baffle 7 becomes larger, resulting in a larger flow rate of refrigerant through this opening, thereby increasing the amount of refrigerant entering the evaporator 1 and thus enhancing the cooling effect.

[0021] However, this expansion valve has certain defects in use. Because the original first chamber 9 is only connected to the capillary tube 2, which is a relatively sealed chamber, the refrigerant at the outlet of the evaporator 1 is not easy to actively flow into the first chamber 9 in a timely manner through the capillary tube 2, regardless of whether the temperature is too low or too high. Therefore, the air conditioning system controlled by this expansion valve has a control delay problem and the energy saving effect is limited.

[0022] Therefore, this utility model improves the expansion valve. Specifically, an auxiliary capillary tube 13 is provided on one side of the upper housing 3 of the expansion valve. The end of the auxiliary capillary tube 13 away from the upper housing 3 of the expansion valve is connected to the interior of the fourth chamber 8. A one-way valve 17 is also provided on the auxiliary capillary tube 13. The one-way valve 17 controls the refrigerant flowing unidirectionally into the fourth chamber 8 through the auxiliary capillary tube 13. Based on the setting of the auxiliary capillary tube 13, the capillary tube 2, the first chamber 9, the auxiliary capillary tube 13, the fourth chamber 8, the third chamber 6, and the evaporator 1 form a relatively closed-loop refrigerant circulation system. In this way, the refrigerant at the outlet of the evaporator 1 can enter the first chamber 9 in time through the capillary tube 2 without any control delay.

[0023] Furthermore, based on the setting of the one-way valve 17, the refrigerant in the auxiliary capillary tube 13 flows unidirectionally into the fourth chamber 8, and there will be no backflow of refrigerant into the fourth chamber 8.

[0024] It should be noted that since the diameters of the main capillary tube 2 and the auxiliary capillary tube 13 are both small, allowing only a small amount of refrigerant to pass through, their impact on the cooling effect of the evaporator 1 is negligible, making them highly practical.

[0025] Considering that the use of capillary tube 2 in the control device of the existing energy-saving air conditioning system still has the following problems:

[0026] Because the capillary tube 2 has a small diameter and is relatively fragile, when the compressor in the air conditioning system vibrates during operation, it also causes the capillary tube 2 to vibrate. Under prolonged vibration, the capillary tube 2 is easily damaged. In addition, the capillary tube 2 has a small structure and is not easy to repair. Usually, the expansion valve can only be replaced as a whole, which results in high operating costs and easy damage.

[0027] Therefore, this utility model also sets the capillary tube 2 and the auxiliary capillary tube 13 as capillary tube assemblies with armored structures. Specifically, both the capillary tube 2 and the auxiliary capillary tube 13 include an inner capillary tube 201, a thermal insulation layer 202, and a metal layer 203. The thermal insulation layer 202 is wound and fixed around the outer ring of the inner capillary tube 201, and the metal layer 203 is fixedly sleeved on the outer ring of the thermal insulation layer 202. The thermal insulation layer 202 has a thermal insulation effect and also has a buffering effect, thus avoiding the phenomenon that the external temperature affects the refrigerant temperature in the capillary tube 2 or the auxiliary capillary tube 13.

[0028] Furthermore, the metal layer 203 can be made of stainless steel or other materials, and its diameter and thickness are larger than those of the built-in capillary tube 201. It has higher overall strength and better protection, which can prevent the built-in capillary tube 201 from being damaged due to working environment issues, and has a longer overall service life.

Claims

1. An energy-saving air conditioning system, comprising an evaporator (1), a capillary tube (2), and an expansion valve, wherein the capillary tube (2) is connected to the expansion valve, the expansion valve is connected to the evaporator (1), and one end of the capillary tube (2) away from the expansion valve is connected to the outlet of the evaporator (1), characterized in that, The capillary tube (2) includes an internal capillary tube (201), a thermal insulation layer (202), and a metal layer (203). The thermal insulation layer (202) is wrapped and fixed around the outer ring of the internal capillary tube (201), and the metal layer (203) is fixedly sleeved on the outer ring of the thermal insulation layer (202).

2. A control device for an energy-saving air conditioning system, characterized in that: The energy-saving air conditioning system according to claim 1, wherein the expansion valve includes an upper expansion valve housing (3) and a lower expansion valve housing (16), the lower expansion valve housing (16) being integrally disposed below the upper expansion valve housing (3), a partition is fixedly disposed inside the upper expansion valve housing (3), a rectangular groove (4) is disposed in the middle of the partition, the partition dividing the interior of the upper expansion valve housing (3) into a first chamber (9) and a second chamber (12) distributed vertically, one end of a capillary tube (2) being connected to the upper end of the first chamber (9), and the other end of the capillary tube (2) being connected to the outlet of the evaporator (1), a diaphragm (10) being disposed above the rectangular groove (4), a spring (11) being fixedly disposed at the bottom of the diaphragm (10), and the lower part of the spring (11) being supported in the second chamber (12). The bottom surface of the diaphragm (10) is fixedly connected to the middle of the lower surface of the diaphragm (10). The valve stem (5) extends into the interior of the lower housing (16) of the expansion valve. A stop block (7) is fixedly provided in the middle of the interior of the lower housing (16). A round hole (14) is provided in the middle of the stop block (7) for the lower end of the valve stem (5) to pass through. The stop block (7) divides the interior of the lower housing (16) of the expansion valve into a third chamber (6) and a fourth chamber (8) distributed vertically. The bottom surface of the stop block (7) is a circular groove structure that bulges upward. A valve core (15) is fixedly provided at one end of the valve stem (5) that extends into the interior of the fourth chamber (8). A refrigerant inlet pipe (18) is connected to the lower end of the fourth chamber (8). The inlet of the evaporator (1) is connected to one side of the third chamber (6).

3. The control device for an energy-saving air conditioning system according to claim 2, characterized in that: The diaphragm (10) has elastic deformation capability.

4. The control device for an energy-saving air conditioning system according to claim 2, characterized in that: An auxiliary capillary tube (13) is provided on one side of the upper housing (3) of the expansion valve. The end of the auxiliary capillary tube (13) away from the upper housing (3) of the expansion valve is connected to the interior of the fourth chamber (8).

5. The control device for an energy-saving air conditioning system according to claim 4, characterized in that: The auxiliary capillary tube (13) is also equipped with a one-way valve (17), which controls the refrigerant flowing unidirectionally from the auxiliary capillary tube (13) into the fourth chamber (8).

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