Novel refrigerating unit

Abstract

The utility model discloses a novel refrigerating unit, which relates to the technical field of refrigerating units and comprises a condenser, an evaporator, a compressor, an oil separator and a pressure maintaining valve. The condenser and the evaporator are both fixedly installed on the fixing frame. The condenser communicates with the evaporator through a heat exchange assembly. The compressor is communicated with the evaporator through a pipeline IV; an oil separator is fixedly mounted on the outer surface of the evaporator through a supporting plate; the oil separator is communicated with the compressor through a pipeline I; a pressure maintaining valve is fixedly mounted on the oil separator; the influence on the resistance value of the piezoresistor is achieved through the pressure in the upper cavity of the pressure maintaining valve, then the repulsive force of the electromagnet on the magnet block is affected, the distance between the cooling hose and the oil inlet pipe is affected through displacement of the magnet block, the influence on the oil temperature of circulating oil is achieved, and the problem that when the temperature of the low-pressure side is high is solved. And high and low pressure difference cannot be quickly established by the device, so that the compressor cannot be started.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration units, in particular to a new type of refrigeration unit. Background Art

[0002] A refrigeration unit is an important industrial equipment, which is mainly used to compress the vapor of low-temperature refrigerant into high-temperature and high-pressure refrigerant to achieve the purpose of refrigeration, cold storage, freezing, etc.

[0003] In the existing refrigeration unit system, the compressor is a vital component, which is responsible for driving the refrigerant to switch between high-pressure and low-pressure states in the refrigeration cycle. In a normal refrigeration cycle, a certain pressure difference is required for the normal operation of the compressor, because it helps the compressor overcome the resistance in the system and pump the refrigerant from the low-pressure end to the high-pressure end. The heat recovery heat pump unit with a pressure maintaining valve disclosed in Chinese patent CN202993664U includes a shell and tube evaporator, a shell and tube condenser, a heat recovery condenser, a throttling device, and a compressor connected to a refrigerant circulation loop, and is characterized in that: a pressure maintaining valve is installed in the refrigerant circulation loop, and the pressure maintaining valve is connected to an external pressure balance interface connected to the low-pressure side of the unit.

[0004] However, the above-mentioned prior art still has the following problems when in use: the above-mentioned prior art can quickly establish a sufficient high and low pressure difference in a short time by setting a pressure maintaining valve, thereby ensuring the normal start-up of the compressor. However, when the working environment temperature rises, the internal pressure of the pressure maintaining valve will also increase after the temperature rises, resulting in a decrease in the pressure difference, and then the pressure difference for the normal operation of the compressor cannot be reached, making it impossible to start the compressor, affecting the normal operation of the refrigeration unit.

[0005] In order to solve the above problems, the utility model proposes a novel refrigeration unit. Utility Model Content

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a new type of refrigeration unit, including a condenser, an evaporator, a compressor, an oil separator, and a pressure maintaining valve; the condenser and the evaporator are fixedly mounted on a fixed frame; the condenser and the evaporator are connected through a heat exchange component; the compressor and the evaporator are connected through a pipeline four; an oil separator is fixedly mounted on the outer surface of the evaporator through a support plate; the oil separator is connected to the compressor through a pipeline one; a pressure maintaining valve is fixedly mounted on the oil separator; an air outlet pipe is integrally formed on the side wall of the pressure maintaining valve; the air outlet pipe is connected to the condenser through a pipeline two; an air inlet pipe is opened at the bottom end of the pressure maintaining valve; the air inlet pipe is connected to the inside of the oil separator; a pressure regulating component is arranged on the pressure maintaining valve;

[0007] The pressure regulating assembly includes a rear detection tube; the rear detection tube is fixedly connected to one side of the outer surface of the pressure maintaining valve; a piston rod is elastically arranged inside the rear detection tube; a slide plate is fixedly installed on the fixed frame at the position corresponding to the rear detection tube; the end of the slide plate facing away from the fixed frame is fixedly connected to the side wall of the pressure maintaining valve; an electromagnetic assembly is arranged on the slide plate; the piston rod is in contact with the electromagnetic assembly; an oil tank is fixedly installed on the fixed frame through two support plates; a mounting plate is fixedly installed on the oil tank; an oil return assembly is arranged on the mounting plate; the oil return assembly passes through the interior of the pressure maintaining valve; the heat exchange assembly is slidably matched with the slide plate and the oil tank.

[0008] Preferably, the heat exchange component includes metal tube 2, condensing hose, metal tube 1, economizer and pipe 3; metal tube 2, condensing hose, metal tube 1, economizer and pipe 3 are connected in sequence; metal tube 2 is fixedly connected to the condenser; a T-shaped groove is provided on the side wall of the mounting plate; a slider is slidably installed inside the T-shaped groove; a long rod is fixedly connected to the slider; the long rod is slidably connected to the outer side of the condensing hose; pipe 3 is fixedly connected to the evaporator; and the economizer is slidably set on the slide.

[0009] Preferably, a front detection pipe is connected to the inner wall of the air intake pipe; and a front detection meter head is fixedly connected to one end of the front detection pipe away from the pressure maintaining valve.

[0010] Preferably, a piston stopper is slidably installed inside the pressure maintaining valve, and the piston stopper corresponds to the position of the air outlet pipe; a second spring is fixedly connected to the top end of the piston stopper; and the other end of the second spring is fixedly installed at the top end of the pressure maintaining valve.

[0011] Preferably, one end of the piston rod located inside the rear detection tube is fixedly connected to a third spring; the other end of the third spring is fixedly connected to the inner wall of the rear detection tube; and a rear detection meter head is fixedly connected to the rear detection tube.

[0012] Preferably, the electromagnetic assembly includes an electrical box, on the side wall of which a varistor is fixedly mounted; the varistor is in contact with the end of the piston rod facing away from the pressure maintaining valve; an electromagnet is fixedly mounted on the other side of the electrical box; a slide groove is provided on the upper end surface of the slide plate; a magnet block is slidably mounted inside the slide groove; the magnetic poles of the magnet block and the opposite end of the electromagnet are the same; the magnet block is fixedly connected to the economizer; a first spring is fixedly connected to the side of the slide groove away from the pressure maintaining valve; the other end of the first spring is fixedly connected to the bottom end of the magnet block.

[0013] Preferably, the oil return assembly includes an electromagnetic oil pump, which is fixedly mounted on the side wall of the mounting plate; the input end of the electromagnetic oil pump is connected to the interior of the oil tank; the output end of the electromagnetic oil pump is fixedly connected to an oil inlet pipe; the condensation hose is sleeved on the outside of the oil inlet pipe; the bottom side of the side wall of the oil tank is fixedly connected to an oil return pipe; the ends of the oil inlet pipe and the oil return pipe facing away from the oil tank both extend to the interior of the pressure maintaining valve; the oil inlet pipe and the oil return pipe form a loop inside the pressure maintaining valve.

[0014] Beneficial Effects

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] (1) The new refrigeration unit affects the resistance of the varistor by maintaining the pressure in the upper chamber of the valve, thereby affecting the repulsive force of the electromagnet on the magnet block. The displacement of the magnet block affects the distance of the cooling hose close to the oil inlet pipe, thereby affecting the temperature of the circulating oil, thereby solving the problem that when the temperature on the low-pressure side is high, the device cannot quickly establish a high-low pressure difference, and the compressor cannot be started.

[0017] (2) This new refrigeration unit takes advantage of the small specific heat capacity of oil and uses an electromagnetic oil pump in conjunction with a condensing hose to cool the circulating oil and thereby reduce the pressure to maintain the temperature in the upper chamber of the valve. This allows the device to quickly establish a high and low pressure difference even when the ambient temperature rises, allowing the compressor to start quickly and perform refrigeration work. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is an internal cross-sectional view of the pressure maintaining valve of the utility model;

[0021] Figure 3 For this utility model Figure 1 A magnified schematic diagram of the middle part;

[0022] Figure 4 For this utility model Figure 1 The enlarged schematic diagram of the middle B part;

[0023] Figure 5 For this utility model Figure 1 Enlarged schematic diagram of middle C part;

[0024] Figure 6 This is a simplified diagram of the connection relationship of the utility model.

[0025] Figure numerals: 1. condenser; 2. evaporator; 3. compressor; 4. oil separator; 5. pressure maintaining valve; 6. oil inlet pipe; 7. oil return pipe; 8. condensing hose; 9. long rod; 10. metal tube one; 11. pipeline one; 12. pipeline two; 13. pipeline three; 14. pipeline four; 15. first spring; 16. slide plate; 17. oil tank; 18. support plate; 19. varistor; 20. electrical box; 21. electromagnet; 22. economizer; 23. magnet block; 24. electromagnetic oil pump; 25. slider; 26. mounting plate; 27. air outlet pipe; 28. air inlet pipe; 29. ​​front detection pipe; 30. piston stopper; 31. piston rod; 32. second spring; 33. third spring; 34. rear detection meter head; 35. front detection meter head; 36. rear detection pipe; 37. metal tube two. DETAILED DESCRIPTION

[0026] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0027] See also Figure 1-Figure 6 The utility model provides a technical solution: a novel refrigeration unit, including a condenser 1, an evaporator 2, a compressor 3, an oil separator 4, and a pressure maintaining valve 5. The condenser 1 and the evaporator 2 are both fixedly mounted on a fixing frame.

[0028] The condenser 1 is connected to the evaporator 2 via a heat exchange component.

[0029] The heat exchange assembly includes a second metal tube 37, a condensing hose 8, a first metal tube 10, an economizer 22, and a third pipe 13. The second metal tube 37, the condensing hose 8, the first metal tube 10, the economizer 22, and the third pipe 13 are connected in sequence. The second metal tube 37 is fixedly connected to the condenser 1. The third pipe 13 is fixedly connected to the evaporator 2.

[0030] The compressor 3 is connected to the evaporator 2 through a pipeline 14. The outer surface of the evaporator 2 is fixedly mounted with an oil separator 4 through a support plate. The oil separator 4 is connected to the compressor 3 through a pipeline 11.

[0031] A pressure maintaining valve 5 is fixedly mounted on the oil separator 4. An air outlet pipe 27 is integrally formed on the side wall of the pressure maintaining valve 5. The air outlet pipe 27 is connected to the condenser 1 through the pipe 2 12. A piston stopper 30 is slidably mounted inside the pressure maintaining valve 5, and the position of the piston stopper 30 corresponds to that of the air outlet pipe 27. A second spring 32 is fixedly connected to the top end of the piston stopper 30. The other end of the second spring 32 is fixedly mounted on the top end of the pressure maintaining valve 5.

[0032] The bottom end of the pressure maintaining valve 5 is provided with an air intake pipe 28. The air intake pipe 28 is connected to the inside of the oil separator 4. The inner wall of the air intake pipe 28 is connected with a front detection pipe 29. The end of the front detection pipe 29 away from the pressure maintaining valve 5 is fixedly connected with a front detection meter head 35.

[0033] The pressure maintaining valve 5 is provided with a pressure regulating component.

[0034] The pressure regulating assembly includes a rear detection tube 36. The rear detection tube 36 is fixedly connected to one side of the outer surface of the pressure maintaining valve 5. A piston rod 31 is elastically arranged inside the rear detection tube 36. One end of the piston rod 31 located inside the rear detection tube 36 is fixedly connected to a third spring 33. The other end of the third spring 33 is fixedly connected to the inner wall of the rear detection tube 36. A rear detection meter head 34 is fixedly connected to the rear detection tube 36.

[0035] A slide plate 16 is fixedly mounted on the fixed frame at a position corresponding to the rear detection tube 36. One end of the slide plate 16 facing away from the fixed frame is fixedly connected to the side wall of the pressure maintaining valve 5. An electromagnetic component is arranged on the slide plate 16. The piston rod 31 contacts and cooperates with the electromagnetic component.

[0036] The electromagnetic assembly includes an electrical box 20, on the side wall of which a varistor 19 is fixedly mounted. The varistor 19 contacts the end of the piston rod 31 away from the pressure maintaining valve 5. An electromagnet 21 is fixedly mounted on the other side of the electrical box 20. A slide groove is provided on the upper end surface of the slide plate 16. A magnet block 23 is slidably mounted inside the slide groove. The magnet block 23 has the same magnetic pole as the opposite end of the electromagnet 21. The magnet block 23 is fixedly connected to the economizer 22. A first spring 15 is fixedly connected to the side of the slide groove away from the pressure maintaining valve 5. The other end of the first spring 15 is fixedly connected to the bottom end of the magnet block 23.

[0037] It should be noted that the varistor 19 is connected in series in the circuit in the electric box 20. The greater the pressure of the varistor 19, the smaller the resistance of the varistor 19, the greater the current in the circuit, and the stronger the magnetic field of the electromagnet 21.

[0038] The oil tank 17 is fixedly mounted on the fixing frame through two support plates 18. A mounting plate 26 is fixedly mounted on the oil tank 17. A T-shaped slide groove is provided on the side wall of the mounting plate 26. A slider 25 is slidably mounted inside the T-shaped slide groove. A long rod 9 is fixedly connected to the slider 25. The long rod 9 is slidably connected to the outer side of the condensation hose 8. It should be noted that each section of the condensation hose 8 is slidably connected to the bottom side of the long rod 9, thereby realizing the stretching and contraction of the condensation hose 8 on the bottom side of the long rod 9.

[0039] An oil return assembly is provided on the mounting plate 26. The oil return assembly passes through the interior of the pressure maintaining valve 5.

[0040] The oil return assembly includes an electromagnetic oil pump 24, which is fixedly mounted on the side wall of the mounting plate 26. The input end of the electromagnetic oil pump 24 is connected to the inside of the oil tank 17. The output end of the electromagnetic oil pump 24 is fixedly connected to the oil inlet pipe 6. The condensation hose 8 is sleeved on the outside of the oil inlet pipe 6. The oil return pipe 7 is fixedly connected to the bottom side of the side wall of the oil tank 17. The ends of the oil inlet pipe 6 and the oil return pipe 7 facing away from the oil tank 17 both extend to the inside of the pressure maintaining valve 5. The oil inlet pipe 6 and the oil return pipe 7 form a loop inside the pressure maintaining valve 5.

[0041] Working principle:

[0042] During operation, the compressor 3 sucks the low-temperature and low-pressure refrigerant vapor from the evaporator 2, and converts the vapor into high-temperature and high-pressure superheated vapor after work compression. Then the high-pressure and high-temperature refrigerant vapor enters the oil separator 4 through the pipeline 11, which is used to remove the oil and gas in the high-temperature and high-pressure vapor flowing out of the compressor 3, and then the high-temperature and high-pressure vapor after the oil and gas are removed enters the lower cavity of the pressure maintaining valve 5 through the air inlet pipe 28 of the pressure maintaining valve 5. Due to the pressure difference between the upper and lower cavities of the pressure maintaining valve 5, the high-temperature and high-pressure vapor can push the piston stopper 30 to make the high-temperature and high-pressure vapor enter the condenser 1 from the air outlet pipe 27 of the pressure maintaining valve 5, so that the gaseous refrigerant condenses into a high-pressure and low-temperature liquid. The high-pressure and low-temperature liquid passes through the metal pipe 2 37 to reach the condensation hose 8, and enters the economizer 22 through the metal pipe 1 10. After the pressure is reduced, it becomes a gas-liquid two-phase mixture with low temperature and low pressure and high liquid content. These gas-liquid two-phase mixtures enter the evaporator 2. In the evaporator 2, the low-temperature and low-pressure refrigerant will exchange heat with the relatively high temperature chilled water, and the refrigerant liquid will be vaporized and become steam after absorbing the heat of the chilled water, thereby reducing the temperature of the chilled water to achieve the purpose of refrigeration. The vaporized refrigerant vapor will be sucked into the compressor 3, and the cycle will be repeated.

[0043] When the temperature inside the unit rises, the air at the upper end of the piston stopper 30 in the cavity of the pressure maintaining valve 5 expands, the pressure increases, and then pushes the piston rod 31 in the rear detection tube 36 to squeeze the varistor 19. When the varistor 19 is under pressure, a passage is formed in the electrical box 20, causing the electromagnet 21 to generate a magnetic field. The greater the pressure in the upper cavity of the pressure maintaining valve 5, the greater the pressure of the piston rod 31 acting on the varistor 19, the smaller the resistance of the varistor 19, the greater the current in the circuit, the stronger the magnetic field of the electromagnet 21, and the electromagnet 21 has the same magnetic pole as the opposite end of the magnet. The principle of like charges repel each other causes the magnet block 23 to slide in the groove in the slide plate 16, thereby driving the economizer 22 to slide. The economizer 22 drives the condensation hose 8 to slide on the long rod 9 by pulling the metal tube 10. Each section of the condensation hose 8 slides on the long rod 9, and then approaches the oil inlet pipe 6. The condensation hose After being stretched, the circle diameter of 8 becomes smaller; then the long rod 9 is pulled downward; the slider 25 slides downward along the slide groove in the mounting plate 26, so that the condensation hose 8 approaches the oil inlet pipe 6 to cool the oil. Under the action of the electromagnetic oil pump 24, the oil in the oil tank 17 is extracted through the oil inlet pipe 6 and flows through the circuit in the cavity of the pressure maintaining valve 5, and then flows back to the oil tank 17 from the return oil pipe 7 to form a circulating oil circuit, in which the condensation hose 8 cools the oil in the oil inlet pipe 6, and the cooled oil flows through the circuit in the upper cavity of the pressure maintaining valve 5 and flows back to the oil tank 17 from the return oil pipe 7, so as to cool the gas in the upper cavity of the pressure maintaining valve 5, so as to reduce the pressure in the cavity, so that the pressure at the air inlet pipe 28 is higher than the pressure at the air outlet pipe 27, and then the piston stopper 30 in the pressure maintaining valve 5 is pushed upward by the gas in the air inlet pipe 28, thereby releasing the restriction of the piston stopper 30 on the air outlet pipe 27. The specific heat capacity of oil is small and the heat absorption rate is high, so the gas in the upper chamber of the pressure maintaining valve 5 can be cooled more quickly, so that the device can quickly establish a high and low pressure difference, and then start the compressor 3 more quickly. The pressure in the upper chamber of the pressure maintaining valve 5 is used to affect the resistance value of the varistor 19, and then the repulsive force of the electromagnet 21 on the magnet block 23 is affected. The displacement of the magnet block 23 affects the distance between the cooling hose and the oil inlet pipe 6, and the circulating oil temperature is affected, thereby solving the problem that when the temperature on the low-pressure side is high, the device cannot quickly establish a high and low pressure difference, and the compressor 3 cannot be started.

[0044] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A novel refrigeration unit, comprising a condenser (1), an evaporator (2), a compressor (3), an oil separator (4), and a pressure maintaining valve (5); characterized in that: The condenser (1) and the evaporator (2) are both fixedly mounted on a fixed frame; the condenser (1) and the evaporator (2) are connected via a heat exchange component; the compressor (3) and the evaporator (2) are connected via a fourth pipeline (14); an oil separator (4) is fixedly mounted on the outer surface of the evaporator (2) via a support plate; the oil separator (4) and the compressor (3) are connected via a first pipeline (11); a pressure maintaining valve (5) is fixedly mounted on the oil separator (4); an air outlet pipe (27) is integrally formed on the side wall of the pressure maintaining valve (5); the air outlet pipe (27) is connected to the condenser (1) via a second pipeline (12); an air inlet pipe (28) is provided at the bottom end of the pressure maintaining valve (5); the air inlet pipe (28) is connected to the inside of the oil separator (4); a pressure regulating component is provided on the pressure maintaining valve (5); The pressure regulating assembly comprises a rear detection tube (36); the rear detection tube (36) is fixedly connected to one side of the outer surface of the pressure maintaining valve (5); a piston rod (31) is elastically arranged inside the rear detection tube (36); a slide plate (16) is fixedly installed at a position of the fixing frame corresponding to the rear detection tube (36); one end of the slide plate (16) away from the fixing frame is fixedly connected to the side wall of the pressure maintaining valve (5); an electromagnetic assembly is arranged on the slide plate (16); the piston rod (31) contacts and cooperates with the electromagnetic assembly; an oil tank (17) is fixedly installed on the fixing frame through two support plates (18); a mounting plate (26) is fixedly installed on the oil tank (17); an oil return assembly is arranged on the mounting plate (26); the oil return assembly passes through the interior of the pressure maintaining valve (5); and the heat exchange assembly is slidably matched with the slide plate (16) and the oil tank (17).

2. The novel refrigeration unit according to claim 1 is characterized in that: The heat exchange component comprises a second metal tube (37), a condensing hose (8), a first metal tube (10), an economizer (22) and a third pipe (13); the second metal tube (37), the condensing hose (8), the first metal tube (10), the economizer (22) and the third pipe (13) are connected in sequence; the second metal tube (37) is fixedly connected to the condenser (1); a T-shaped slide groove is provided on the side wall of the mounting plate (26); a slider (25) is slidably installed inside the T-shaped slide groove; a long rod (9) is fixedly connected to the slider (25); the long rod (9) is slidably connected to the outer side of the condensing hose (8); the third pipe (13) is fixedly connected to the evaporator (2); and the economizer (22) is slidably arranged on the slide plate (16).

3. The novel refrigeration unit according to claim 1 is characterized in that: The inner wall of the air intake pipe (28) is connected to a front detection pipe (29); one end of the front detection pipe (29) which faces away from the pressure maintaining valve (5) is fixedly connected to a front detection meter head (35).

4. The novel refrigeration unit according to claim 1 is characterized in that: A piston stopper (30) is slidably mounted inside the pressure maintaining valve (5), and the position of the piston stopper (30) corresponds to the position of the air outlet pipe (27); a second spring (32) is fixedly connected to the top end of the piston stopper (30); and the other end of the second spring (32) is fixedly mounted on the top end of the pressure maintaining valve (5).

5. The novel refrigeration unit according to claim 1 is characterized in that: One end of the piston rod (31) located inside the rear detection tube (36) is fixedly connected to a third spring (33); the other end of the third spring (33) is fixedly connected to the inner wall of the rear detection tube (36); and a rear detection meter head (34) is fixedly connected to the rear detection tube (36).

6. The novel refrigeration unit according to claim 1 is characterized in that: The electromagnetic assembly comprises an electrical box (20), a varistor (19) is fixedly mounted on the side wall of the electrical box (20); the varistor (19) contacts one end of the piston rod (31) away from the pressure maintaining valve (5); an electromagnet (21) is fixedly mounted on the other side of the electrical box (20); a slide groove is provided on the upper end surface of the slide plate (16); a magnet block (23) is slidably mounted inside the slide groove; the magnetic poles of the magnet block (23) and the electromagnet (21) at the opposite ends are the same; the magnet block (23) is fixedly connected to the economizer (22); a first spring (15) is fixedly connected to the side of the slide groove away from the pressure maintaining valve (5); the other end of the first spring (15) is fixedly connected to the bottom end of the magnet block (23).

7. The novel refrigeration unit according to claim 1 is characterized in that: The oil return assembly comprises an electromagnetic oil pump (24), which is fixedly mounted on the side wall of the mounting plate (26); the input end of the electromagnetic oil pump (24) is connected to the interior of the oil tank (17); the output end of the electromagnetic oil pump (24) is fixedly connected to an oil inlet pipe (6); a condensation hose (8) is sleeved on the outside of the oil inlet pipe (6); an oil return pipe (7) is fixedly connected to the bottom side of the side wall of the oil tank (17); the ends of the oil inlet pipe (6) and the oil return pipe (7) facing away from the oil tank (17) both extend to the interior of the pressure maintaining valve (5); the oil inlet pipe (6) and the oil return pipe (7) form a loop inside the pressure maintaining valve (5).

Images