Engine oil preheating device for water chilling unit and water chilling unit

Abstract

The utility model provides an engine oil preheating device for a water chilling unit and the water chilling unit, the engine oil preheating device comprises a base plate containing sealing threads, a barrel body connected with the base plate in a sealing mode and a top cover connected with the top end of the barrel body, a boss is arranged on the base plate, and a heating ring is wound on the boss; the barrel body is communicated with a liquid level device, an oil inlet pipe is arranged on the top cover, and a filter is arranged at the lower position of the barrel body and connected with an oil outlet pump outside the barrel body through an oil outlet pipe. In addition, the water chilling unit comprising the independent engine oil preheating device is provided, the oil quality is improved, the flowability of the oil is improved, the viscosity of the oil is reduced, the blockage of an oil outlet path of an oil-liquid separator in the unit is avoided, the oil leakage phenomenon of the water chilling unit is improved, and the practicability of the engine oil preheating device and the water chilling unit is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water chiller, in particular to a water chiller oil preheating device and water chiller. BACKGROUND

[0002] The refrigeration unit generally includes a compressor, a condenser and an oil separator, the compressor compresses the low-temperature and low-pressure gas refrigerant into high-temperature and high-pressure gas, the oil is separated out by the oil separator and returned to the compressor, the refrigerant enters the condenser to be cooled and becomes high-pressure liquid, and then enters the evaporator to be heated and evaporated after being throttled and depressurized by the expansion valve, and then returns to the compressor, and the cycle process realizes efficient refrigeration. However, in use, the lubricating oil may not return to the compressor normally, and the reason may be that the oil cannot enter the compressor normally due to the blockage of the oil separator, or the refrigerant flow is insufficient, or the oil return channel is not smooth, etc. Based on the foregoing reasons, the oil does not enter the compressor normally, but enters the evaporator or the condenser, which is called "oil running" or "oil running".

[0003] It can be seen that the foregoing oil running or oil running phenomenon is caused in part by the blockage of the oil separator, and the reason for the blockage of the oil separator is generally the change of the oil quality, such as the increase of the oil viscosity, and in some application environments, the refrigerant can be miscible with the refrigeration oil, which causes the viscosity of the refrigeration oil to increase at low temperature, which easily causes the oil channel to be blocked, and therefore it is often necessary to preheat the refrigeration oil before starting. The general preheating method is to provide a heating unit in the oil separator, but this heating method not only occupies the internal volume of the oil separator, but also the oil adsorbed on the surface of the heating unit affects heat dissipation, that is, affects the preheating efficiency. Therefore, the present application provides a water chiller oil preheating device and water chiller. Utility model content

[0004] The embodiment of the present application provides a water chiller oil preheating device and water chiller, which optimizes the structure of the oil preheating device, improves the preheating efficiency and quality of the oil, avoids the blockage of the oil separator, and indirectly solves the problem of oil running of the unit caused by the blockage of the oil separator.

[0005] In a first aspect, the present application provides a water chiller oil preheating device, which is arranged between the oil separator and the compressor in the water chiller, and comprises a bottom disc comprising a sealed thread, a barrel body in sealed connection with the bottom disc, and a top cover connected with the top end of the barrel body, wherein a boss is arranged on the bottom disc, and a heating ring is arranged around the boss; a liquid level indicator is communicated with the barrel body; an oil inlet pipe is arranged on the top cover; a filter is arranged at a lower position of the barrel body; and the filter is connected with an oil outlet pump outside the barrel body through an oil outlet pipe.

[0006] Optionally, the top cover further comprises a cylinder, and a piston rod end side of the cylinder is provided with an oil mixing device.

[0007] Optionally, the oil mixing device comprises a bottom plate and a blade, the blade is in a spiral shape, and opposite surfaces of the bottom plate are connected with the piston rod of the cylinder and the blade respectively.

[0008] Optionally, the rotating radius of the blade is in a gradient structure.

[0009] Optionally, the bottom plate is provided with a sealing groove and a sealing strip mounted in the sealing groove.

[0010] Optionally, the filter is provided with a first filter membrane and a second filter membrane, the first filter membrane and the second filter membrane are fixed through a first hoop membrane plate and a second hoop membrane plate respectively, and the first hoop membrane plate is screwed with the second hoop membrane plate.

[0011] Optionally, the oil outlet valve is arranged at the rear end of the filter, the detection end of the thermometer is arranged in the barrel, and the observation end of the thermometer is arranged on the top cover.

[0012] In the second aspect, the utility model provides a kind of water chiller, including condenser, evaporator, compressor, oil separator, throttling valve, further including any one of the oil preheating device described above, and the oil outlet of the compressor is connected with the oil outlet pump of the oil preheating device by oil pipe, and the oil inlet pipe of the oil preheating device is connected with the oil outlet of the oil separator;The water outlet of the oil separator is connected with the condenser, and the throttling valve is arranged between the condenser and the evaporator, the liquid outlet of the evaporator is connected with the compressor, and the liquid outlet of the compressor is connected with the liquid inlet of the oil separator.

[0013] Optionally, further comprising a one-way electronic control valve, the one-way electronic control valve is arranged in the pipeline of the water chiller.

[0014] The utility model has the advantages of:

[0015] The oil preheating device provided by the utility model is applied to a water chiller unit, is arranged between an oil separator and a compressor, and preheats the separated oil before the oil enters the compressor, so that the oil quality is improved, the oil flowability is improved, the oil viscosity is reduced, the oil outlet of the oil separator in the unit is prevented from being blocked, and the oil running phenomenon of the water chiller unit is improved. The preheating device is arranged independently of other devices of the water chiller unit, a heating ring is arranged at the bottom end of the preheating device and is used for uniform heating, a filter is arranged to remove impurities in the oil and purify the oil quality, and a visible liquid level indicator is arranged to check the oil amount in the preheating device. That is, the utility model realizes independent preheating of oil, purifies the oil, improves the preheating efficiency, prevents the oil separator from being blocked, optimizes the water chiller unit as a whole, and indirectly solves the oil running problem of the water chiller unit. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 Fig. 1 is a front view and a partially cutaway schematic view of an oil preheating device for a water chiller unit according to the utility model;

[0017] Figure 2 Fig. 4 is a front view of a mixing device in the embodiment;

[0018] Figure 3 Fig. 5 is a three-dimensional axial view of a filter in the embodiment;

[0019] Figure 4 Fig. 6 is a schematic view of a component structure of a water chiller unit according to the utility model.

[0020] In the drawings:

[0021] 1: base plate; 11: boss; 12: heating ring; 13: sealing strip; 2: barrel body; 21: filter; 210: first filter membrane; 212: first hoop membrane plate; 213: second hoop membrane plate; 22: oil outlet pipe; 3: top cover; 31: oil inlet pipe; 4: mixing device; 41: bottom plate; 42: blade; 5: condenser; 6: evaporator; 7: compressor; 8: oil separator. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments. In addition, "in an embodiment" or "in an embodiment" appearing at various places in the specification does not necessarily mean the same embodiment. In addition, these specific features, structures or characteristics can be combined in any suitable manner in one or more embodiments.

[0023] It is also important to note that the terms "first" and "second" and the like are used herein merely to distinguish one element from another, and are not necessarily intended to or should be construed to refer to a chronological or sequential order. Furthermore, the terms "comprise", "include", and the like are intended to mean "consisting of" or "consisting essentially of" unless otherwise noted. Stated in other words, the terms "comprise", "include", and the like are intended to be used as a non-exclusive inclusion, such that items not explicitly listed are also included.

[0024] In the case of long-term shutdown of the water chiller unit, the refrigerant will migrate into the refrigeration oil and be miscible with the refrigeration oil due to changes in the ambient temperature. The refrigeration oil needs to be preheated before the unit is started to separate the refrigerant and the refrigeration oil, improve the viscosity of the refrigeration oil, and prevent oil leakage when the unit is started. However, the existing preheating method is to provide a heating unit in the oil separator, but this heating method not only occupies the internal volume of the oil separator, but also the oil adsorbed on the surface of the heating unit will affect heat dissipation, that is, the efficiency of preheating. Therefore, the utility model provides a kind of oil preheating device for water chiller unit and water chiller unit.

[0025] The oil preheating device for water chiller unit provided by the utility model improves the efficiency and quality of oil preheating by optimizing the structure of the oil preheating device, avoids the blockage of the oil separator, and indirectly solves the problem of oil leakage caused by the blockage of the oil separator.

[0026] The utility model will be described in detail below with reference to the drawings.

[0027] First, the utility model provides an oil preheating device for water chiller unit, which is arranged between the oil separator and the compressor in the water chiller unit, as shown in Figure 1 The bottom plate 1 is provided with a boss 11, and a heating ring 12 is arranged around the boss 11. The barrel body 2 is provided with a liquid level gauge, and the top cover 3 is provided with an oil inlet pipe 31. A filter 21 is arranged at a lower position of the barrel body 2, and the filter 21 is connected to an oil outlet pump outside the barrel body 2 through an oil outlet pipe 22.

[0028] As described above, the preheating device is independent of other devices of the water cooling unit, a heating ring 12 is arranged at the bottom end of the preheating device, the heating ring 12 is arranged on the boss 11 inside the bottom disc 1, the boss 11 is used to form a temperature gradient in the barrel 2, so that the oil temperature in the barrel 2 spreads from the center to both sides within a certain height range, which is beneficial to rapid heating. Compared with the existing rod-shaped heating element, the heating efficiency of the heating structure is fast. At the same time, a filter 21 is arranged to remove impurities in the oil and purify the oil quality. In addition, an external visual liquid level detector is arranged by using the principle of communicating vessels, which is used to check the oil amount in the preheating device. Compared with the plug-in type liquid level detection device, the liquid level detection in the embodiment not only realizes visualization, but also does not need to insert the detection device into the barrel 2, which increases the effective space of the engine oil in the barrel 2.

[0029] Among them, the aforementioned heating ring 12 can be a circular ring composed of a heating element directly powered to generate heat, or a circular pipe can be arranged to pass the heating liquid from the outside into the circular pipe, and the oil in the barrel 2 is heated by indirect heating.

[0030] It should be noted that the bottom disc 1 is provided with a sealing groove and a sealing strip 13 mounted in the sealing groove, and the sealing strip 13 is used to seal the bottom disc 1 and the barrel 2. In addition, an oil outlet valve and a thermometer are also included, the oil outlet valve is arranged at the rear end of the filter 21, the detection end of the thermometer is arranged in the barrel 2, and the observation end of the thermometer is arranged on the top cover 3.

[0031] In addition, the top cover 3 of the engine oil preheating device in the embodiment further includes a gas cylinder, and a piston rod end side of the gas cylinder is provided with an oil mixer 4. The oil mixer 4 includes a bottom plate 41 and a blade 42, the blade 42 is in a spiral shape, and opposite surfaces of the bottom plate 41 are connected with the piston rod of the gas cylinder and the blade 42 respectively.

[0032] As shown in Figure 2 The oil mixer 4 is used to uniformly mix the oil at different depths in the barrel 2. The gas cylinder drives the oil mixer 4, and the blade 42 of the oil mixer 4 applies a force to the oil, which pushes the deep oil to the surface layer and pushes the surface oil into the deep layer, so as to promote the uniform heating of the heating ring 12.

[0033] In some embodiments, the rotating radius of the blade 42 of the aforementioned oil mixer 4 is a gradually changing structure. The spiral structure can increase the turbulence of the engine oil in the barrel 2 during movement, which is beneficial to promote the heat exchange of the engine oil. The gradually changing spiral structure can improve the turbulence of the engine oil in the barrel 2, and at the same time, it can also reduce the output thrust of the gas cylinder, thereby saving electric energy.

[0034] In some embodiments, as shown in Figure 3As shown, the filter 21 is provided with a first filter membrane 210 and a second filter membrane, the first filter membrane 210 and the second filter membrane are fixed by a first hoop membrane plate 212 and a second hoop membrane plate 213 respectively, and the first hoop membrane plate 212 is screwed with the second hoop membrane plate 213.

[0035] When the preheating device and the oil of the water chiller set flow out of the barrel body 2, the oil first passes through the first filter membrane 210 and then passes through the second filter membrane to filter the floating matter and other impurities in the oil. The first hoop membrane plate 212 and the second hoop membrane plate 213 are fixing devices for fixing the first filter membrane 210 and the second filter membrane respectively, and the two are screwed together, which facilitates the removal of the first filter membrane 210 or the second filter membrane during maintenance and facilitates the adjustment of the distance between the first filter membrane 210 and the second filter membrane.

[0036] In the second aspect, as shown, Figure 4 The utility model provides a kind of water chiller set, including condenser 5, evaporimeter 6, compressor, oil separator, throttling valve, further include any described oil preheating device, and the oil preheating device is connected with the oil return port of compressor 7 by oil pipe, and the oil inlet pipe 31 of oil preheating device is connected with the oil outlet of oil separator 8;The water outlet of oil separator 8 is connected with condenser 5, and throttling valve is arranged between condenser 5 and evaporimeter 6, and the liquid outlet of evaporimeter 6 is connected with compressor 7, and the liquid outlet of compressor 7 is connected with the liquid inlet of oil separator 8.In addition, it further includes one-way electronic control valve, and one-way electronic control valve is arranged in the pipeline of water chiller set, to assist control each equipment in water chiller set, realize normal operation.

[0037] Finally, the utility model provides a kind of water chiller set with oil preheating device and water chiller set, which comprises: the bottom disc 1 including sealed screw, the barrel body 2 connected with the bottom disc 1 and the top cover 3 connected with the top end of barrel body 2, the bottom disc 1 is equipped with boss 11, and the boss 11 is wound with heating ring 12;Barrel body 2 is communicated with liquid level gauge, and the top cover 3 is equipped with oil inlet pipe 31, and the filter 21 is arranged at the lower position of barrel body 2, and the filter 21 is connected with the oil pump outside barrel body 2 by oil outlet pipe 22.In addition, a water chiller set comprising an independent oil preheating device is provided, which improves oil quality, improves oil flowability, reduces oil viscosity and avoids blockage of the oil outlet of the oil separator 8 in the unit, thereby improving the oil running phenomenon of the water chiller set and improving the practicality of the oil preheating device and the water chiller set.

[0038] It should be noted that the above embodiments all belong to the same utility model concept, and the description of each embodiment has its own emphasis.

[0039] The above embodiments only express the implementation manners of the utility model, and the description is relatively specific and detailed, but cannot be understood as the limitation of the utility model patent scope. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. An oil preheating device for a chiller unit, wherein the oil preheating device is disposed between the oil separator and the compressor in the chiller unit, characterized in that, include: The container includes a base (1) with sealing threads, a barrel (2) sealed to the base (1), and a top cover (3) connected to the top of the barrel (2). The base (1) has a boss (11) and a heating ring (12) is wound around the boss (11). The barrel (2) is connected to a liquid level gauge. The top cover (3) has an oil inlet pipe (31). The barrel (2) is provided with a filter (21) at a lower position. The filter (21) is connected to an oil pump outside the barrel (2) through an oil outlet pipe (22).

2. The oil preheating device for chiller units according to claim 1, characterized in that, The top cover (3) also includes a cylinder, and the piston rod end of the cylinder is provided with an oil mixer (4).

3. The oil preheating device for chiller units according to claim 2, characterized in that, The mixer (4) includes a base plate (41) and blades (42). The blades (42) are spiral-shaped. The two opposite sides of the base plate (41) are connected to the piston rod of the cylinder and the blades (42), respectively.

4. The oil preheating device for chiller units according to claim 3, characterized in that, The rotation radius of the blade (42) is gradually changing.

5. The oil preheating device for chiller units according to claim 1, characterized in that, The chassis (1) is provided with a sealing groove and a sealing strip (13) installed in the sealing groove.

6. The oil preheating device for chiller units according to claim 1, characterized in that, The filter (21) is provided with a first filter membrane (210) and a second filter membrane. The first filter membrane (210) and the second filter membrane are fixed by a first clamping plate (212) and a second clamping plate (213), respectively. The first clamping plate (212) and the second clamping plate (213) are screwed together.

7. The oil preheating device for chiller units according to claim 1, characterized in that, It also includes an oil outlet valve and a thermometer. The oil outlet valve is located at the rear end of the filter (21), the detection end of the thermometer is inserted inside the barrel (2), and the observation end of the thermometer is located on the top cover (3).

8. A water chiller unit, comprising a condenser (5), an evaporator (6), a compressor (7), an oil separator (8), and a throttle valve, characterized in that, It also includes the oil preheating device according to any one of claims 1 to 7, wherein the oil outlet pump of the oil preheating device is connected to the oil return port of the compressor (7) through an oil pipe, and the oil inlet pipe (31) of the oil preheating device is connected to the oil outlet of the oil separator (8); the water outlet of the oil separator (8) is connected to the condenser (5), the throttle valve is provided between the condenser (5) and the evaporator (6), the liquid outlet of the evaporator (6) is connected to the compressor (7), and the liquid outlet of the compressor (7) is connected to the liquid inlet of the oil separator (8).

9. The chiller unit according to claim 8, characterized in that, It also includes a one-way electronic control valve, which is located in the pipeline of the chiller unit.

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