CN108759206A - The purification method for controlling oil return of handpiece Water Chilling Units and handpiece Water Chilling Units - Google Patents
The purification method for controlling oil return of handpiece Water Chilling Units and handpiece Water Chilling Units Download PDFInfo
- Publication number
- CN108759206A CN108759206A CN201810618647.9A CN201810618647A CN108759206A CN 108759206 A CN108759206 A CN 108759206A CN 201810618647 A CN201810618647 A CN 201810618647A CN 108759206 A CN108759206 A CN 108759206A
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- China
- Prior art keywords
- refrigerant
- oil return
- temperature
- water chilling
- chilling units
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/006—Accumulators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/02—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
Abstract
The invention discloses the purification method for controlling oil return of a kind of handpiece Water Chilling Units and handpiece Water Chilling Units, wherein, handpiece Water Chilling Units include compressor, condenser, evaporator, refrigerant purifier, injector, oil return valve and fuel tank, the refrigerant inlet of injector is connected with the second refrigerant exit of condenser, the oiler of injector is connected with the oil outlet of refrigerant purifier, the oil outlet of injector is connected with fuel tank, and purification method for controlling oil return includes the following steps：Detect liquid level, the condensation temperature of handpiece Water Chilling Units and the evaporating temperature of evaporator；Obtain the temperature gap between condensation temperature and evaporating temperature；Oil return valve is controlled according to liquid level and temperature gap.Thereby, it is possible to effectively avoid the situation that oil-free is desirable during oil return, the reliability, high efficiency and stability of oil return are improved, improves the ability efficiency of handpiece Water Chilling Units, and method is simple and practicable.
Description
Technical field
The present invention relates to refrigeration technology field, more particularly to the purification method for controlling oil return and one kind of a kind of handpiece Water Chilling Units are cold
Water dispenser group.
Background technology
For handpiece Water Chilling Units (e.g., centrifugal chiller), refrigeration oil is usually there will be in operation process with Machinery Ministry
In part sealing leak to coolant circulating system.For the problem, conventional way is suitable cold by injector selection one
Matchmaker's system trapped fuel position, refrigeration oil is recovered in handpiece Water Chilling Units oil circulating system.
And it takes oily mode mainly to take oil return line by periodically switching correlation and carries out taking oil.However, this take oily mode
Can not judge to take well oil it is suitable whether, it is desirable often to will appear oil-free, causes unnecessary refrigerant to bypass, greatly drop
The low ability efficiency of handpiece Water Chilling Units, while also causing oil circulating system unstable because retriing excessive refrigerant.
Invention content
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, the present invention
First purpose be to propose a kind of purification method for controlling oil return of handpiece Water Chilling Units, and oil-free can during capable of effectively avoiding oil return
The case where taking improves the reliability, high efficiency and stability of oil return, improves the ability efficiency of handpiece Water Chilling Units, and method is simply easy
Row.
Second object of the present invention is to propose a kind of non-transitorycomputer readable storage medium.
Third object of the present invention is to propose a kind of handpiece Water Chilling Units.
In order to achieve the above objectives, first aspect present invention embodiment proposes a kind of purification oil return controlling party of handpiece Water Chilling Units
Method, the handpiece Water Chilling Units include compressor, condenser, evaporator, refrigerant purifier, injector, oil return valve and fuel tank, the pressure
The air entry of contracting machine is connected with the first refrigerant exit of the evaporator, and the exhaust outlet of the compressor is cold with the condenser
Matchmaker's entrance is connected, and the first refrigerant exit of the condenser is connected with the first refrigerant inlet of the refrigerant purifier, described cold
First refrigerant exit of matchmaker's purifier is connected with the refrigerant inlet of the evaporator, the second refrigerant exit of the evaporator and institute
The second refrigerant inlet for stating refrigerant purifier is connected, the second refrigerant exit of the refrigerant inlet of the injector and the condenser
Be connected, the oiler of the injector is connected with the oil outlet of the refrigerant purifier, the oil outlet of the injector with it is described
Fuel tank be connected, refrigerant inlet/oiler/oil outlet in the injector is arranged in the oil return valve, the method includes with
Lower step：Detect the liquid level of the evaporator, the condensation temperature and evaporating temperature of the handpiece Water Chilling Units；Obtain the condensation temperature
With the temperature gap between the evaporating temperature；The oil return valve is controlled according to the liquid level and the temperature gap.
The purification method for controlling oil return of handpiece Water Chilling Units according to the ... of the embodiment of the present invention detects the liquid level, cold of evaporator first
The condensation temperature and evaporating temperature of water dispenser group, and the temperature gap between condensation temperature and evaporating temperature is obtained, then according to liquid
Position and temperature gap control oil return valve, thus, it is possible to effectively avoid the situation that oil-free is desirable during oil return, improve back
Reliability, high efficiency and the stability of oil, improve the ability efficiency of handpiece Water Chilling Units, and method is simple and practicable.
In one embodiment of the invention, described that the oil return valve is carried out according to the liquid level and the temperature gap
Control, including：Judge whether the liquid level is more than or equal to default level threshold and whether the temperature gap is more than or equal to default
Temperature gap threshold value；If the liquid level is more than or equal to the default level threshold and the temperature gap is more than or equal to described pre-
If temperature gap threshold value, then controls the oil return valve every the first preset time and open the second preset time.
In one embodiment of the invention, if the liquid level is less than the default level threshold or the temperature difference
Value is less than the preset temperature difference threshold, then when first preset time controls the oil return valve unlatching third and presets
Between, wherein the third preset time is less than second preset time.
In one embodiment of the invention, the value range of first preset time be 150~600s, described second
The value range of preset time is 20~60s, and the value range of the third preset time is 10~30s.
In order to achieve the above objectives, second aspect of the present invention embodiment proposes a kind of non-transitory computer-readable storage medium
Matter is stored thereon with computer program, which realizes the purification oil return control of above-mentioned handpiece Water Chilling Units when being executed by processor
Method.
Non-transitorycomputer readable storage medium according to the ... of the embodiment of the present invention, by executing above-mentioned handpiece Water Chilling Units
Method for controlling oil return is purified, the situation that oil-free is desirable during oil return can be effectively avoided, improve reliability, the high efficiency of oil return
And stability, the ability efficiency of handpiece Water Chilling Units is improved, and method is simple and practicable.
In order to achieve the above objectives, third aspect present invention embodiment proposes a kind of handpiece Water Chilling Units, including：Compressor；It is cold
Condenser and evaporator, the air entry of the compressor are connected with the first refrigerant exit of the evaporator, the row of the compressor
Gas port is connected with the refrigerant inlet of the condenser；Refrigerant purifier, the first refrigerant exit and the refrigerant of the condenser
First refrigerant inlet of purifier is connected, the first refrigerant exit of the refrigerant purifier and the refrigerant inlet phase of the evaporator
Even, the second refrigerant exit of the evaporator is connected with the second refrigerant inlet of the refrigerant purifier；Injector and fuel tank, institute
The refrigerant inlet for stating injector is connected with the second refrigerant exit of the condenser, the oiler of the injector and the refrigerant
The oil outlet of purifier is connected, and the oil outlet of the injector is connected with the fuel tank；Oil return valve, the oil return valve are arranged in institute
State refrigerant inlet/oiler/oil outlet of injector；Control device, for the liquid level for detecting the evaporator, the cold water
The condensation temperature and evaporating temperature of unit, and the temperature gap between the condensation temperature and the evaporating temperature is obtained, and
The oil return valve is controlled according to the liquid level and the temperature gap.
Handpiece Water Chilling Units according to the ... of the embodiment of the present invention, by control device detect the liquid level of evaporator, handpiece Water Chilling Units it is cold
Solidifying temperature and evaporating temperature, and the temperature gap between condensation temperature and evaporating temperature is obtained, and according to liquid level and temperature difference
Value controls oil return valve, thus, it is possible to effectively avoid the situation that oil-free is desirable during oil return, improves the reliable of oil return
Property, high efficiency and stability, improve the ability efficiency of handpiece Water Chilling Units, and method is simple and practicable.
In one embodiment of the invention, the control device according to the liquid level and the temperature gap to described time
When fuel tap is controlled, wherein the control device judges whether the liquid level is more than or equal to default level threshold and the temperature
Spend whether difference is more than or equal to preset temperature difference threshold, if the liquid level is more than or equal to the default level threshold and described
Temperature gap is more than or equal to the preset temperature difference threshold, and the control device is then every described time of the first preset time control
Fuel tap opens the second preset time.
In one embodiment of the invention, if the liquid level is less than the default level threshold or the temperature difference
Value is less than the preset temperature difference threshold, and the control device then controls the oil return valve every first preset time and opens
Open third preset time, wherein the third preset time is less than second preset time.
In one embodiment of the invention, the value range of first preset time be 150~600s, described second
The value range of preset time is 20~60s, and the value range of the third preset time is 10~30s.
The additional aspect of the present invention and advantage will be set forth in part in the description, and will partly become from the following description
Obviously, or practice through the invention is recognized.
Description of the drawings
Above-mentioned and/or additional aspect and advantage of the invention will become from the following description of the accompanying drawings of embodiments
Obviously and it is readily appreciated that, wherein：
Fig. 1 is the flow chart according to the purification method for controlling oil return of the handpiece Water Chilling Units of the embodiment of the present invention；
Fig. 2 is the structural schematic diagram according to the handpiece Water Chilling Units of one embodiment of the invention；
Fig. 3 is the schematic view of the mounting position according to the oil return valve of one embodiment of the invention；
Fig. 4 is the flow chart according to the purification method for controlling oil return of the handpiece Water Chilling Units of one embodiment of the invention.
Specific implementation mode
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
The purification method for controlling oil return, non-of the handpiece Water Chilling Units proposed according to embodiments of the present invention described with reference to the accompanying drawings
Provisional computer readable storage medium and handpiece Water Chilling Units.
Fig. 1 is the flow chart of the purification method for controlling oil return of handpiece Water Chilling Units according to the ... of the embodiment of the present invention.
In an embodiment of the present invention, as shown in Fig. 2, handpiece Water Chilling Units may include：Compressor 1, condenser 2, evaporator 3,
Refrigerant purifier 4, injector 5, oil return valve 6 and fuel tank 7.
Wherein, the air entry of compressor 1 is connected with the first refrigerant exit of evaporator 3, the exhaust outlet of compressor 1 and condensation
The refrigerant inlet of device 2 is connected, and the first refrigerant exit of condenser 2 is connected with the first refrigerant inlet of refrigerant purifier 4, and refrigerant carries
First refrigerant exit of pure device 4 is connected with the refrigerant inlet of evaporator 3, the second refrigerant exit and the refrigerant purifier 4 of evaporator 3
The second refrigerant inlet be connected, the refrigerant inlet of injector 5 is connected with the second refrigerant exit of condenser 2, and injector 5 enters oil
Mouth is connected with the oil outlet of refrigerant purifier 4, and the oil outlet of injector 5 is connected with fuel tank 7.Oil return valve 6 is arranged in injector 5
Refrigerant inlet/oiler/oil outlet, specific as shown in Figure 3a, oil return valve 6 may be provided at the oil outlet of injector 5；Such as Fig. 3 b
Shown, oil return valve 6 may be provided at the refrigerant inlet of injector 5；As shown in Figure 3c, what oil return valve 6 may be provided at injector 5 enters oil
Mouthful, specific installation position can select according to actual needs.
With continued reference to Fig. 2, the refrigerant exit of refrigerant purifier 4 is also connected with the air entry of compressor 1, the refrigerant of fuel tank 7
Outlet be also connected with the air entry of compressor 1, the oil outlet of fuel tank 7 is connected with the oiler of compressor 1, compressor 1 it is fuel-displaced
Mouth is also connected with fuel tank 7.In addition, being additionally provided with oil pump 8 between the oil outlet and the oiler of compressor 1 of fuel tank 7.In addition,
It is additionally provided with throttle part 9 between the first refrigerant exit and the refrigerant inlet of evaporator 3 of refrigerant purifier 4.
As shown in Fig. 2, compressor 1, condenser 2, evaporator 3 and throttle part 9 constitute the refrigerant circulation of handpiece Water Chilling Units
System, wherein throttle part 9 for realizing refrigerant circulation control；Refrigerant purifier 4, injector 5, oil return valve 6,7 and of fuel tank
Oil pump 8 constitutes the oil system of handpiece Water Chilling Units, wherein refrigerant purifier 4 is used for by going out from the first refrigerant exit of condenser 2
The high-temperature liquid state refrigerant come carries out heating purification to the low temperature liquid refrigerant come out from the second refrigerant exit of evaporator 3 so that
Refrigeration oil is deposited on the bottom of refrigerant purifier 4；Injector 5 is used for from the second refrigerant exit of condenser 2 (e.g., condenser 2
On top exit or equivalent gas exhaust piping) high-pressure gaseous refrigerant (high pressure refrigerant origin) is taken, drawn by high-pressure gaseous refrigerant
The refrigeration oil for penetrating 2 bottom of refrigerant purifier returns to fuel tank 7, on the one hand can solve the limitation on height and position, another party in this way
Face can preferably control the injection volume of refrigeration oil by injector 5；Oil return valve 6 controls for realizing oil return；Oil pump 8 is used for will
Refrigeration oil in fuel tank 7 is pumped into compressor 1, to be lubricated to compressor 1.
It should be noted that when the refrigeration oil by 5 injection refrigerant purifier of injector, 2 bottom returns to fuel tank 7, can incite somebody to action
Refrigerant is brought into fuel tank 7, but due in fuel tank 7 refrigeration oil and refrigerant mixture can be because of the electric heater unit work in fuel tank 7
Make and generate separation, and the gaseous coolant separated can by the air entry of the refrigerant exit of fuel tank 7 and compressor 1 it
Between pipeline (refrigerant balance pipeline) return in compressor 1, and then return in coolant system, deposited because in the fuel tank 7 without caused by
Enter refrigerant.
As shown in Figure 1, the purification method for controlling oil return of the handpiece Water Chilling Units of the embodiment of the present invention may include following steps：
S1 detects the liquid level of evaporator, the condensation temperature of handpiece Water Chilling Units and evaporating temperature.
Specifically, the liquid level of evaporator can be detected by liquid level sensor, wherein liquid level sensor is a kind of measurement liquid
The pressure sensor of position spreads silicon based on the surveyed fluid pressure principle proportional to the height of the liquid using isolated form
Sensing element or ceramic capacitive pressure sensitive sensor, electric signal is converted to by static pressure, is corrected with linear using temperature-compensating,
It is converted to standard electric signal.
The condensation temperature of handpiece Water Chilling Units is the corresponding saturation temperature of condensing pressure, i.e., temperature when refrigerant liquefies within the condenser
Degree；Evaporating temperature is the corresponding saturation temperature of evaporating pressure, i.e., temperature when refrigerant vaporizes in evaporator, therefore, Ke Yitong
Excess temperature sensor detects the condensation temperature and evaporating temperature of handpiece Water Chilling Units respectively.
S2 obtains the temperature gap between condensation temperature and evaporating temperature.
Specifically, the temperature gap between condensation temperature and evaporating temperature can be obtained directly by temperature sensor measurement
Result obtain.
S3 controls oil return valve according to liquid level and temperature gap.
Specifically, the liquid taking port (refrigerant inlet) due to refrigerant purifier is derived from evaporator, and under normal conditions, steam
Refrigerant purifier can be higher than by sending out the physical height of device, so, the potential energy of difference in height can be relied on so that base of evaporator is mixed with cold
The refrigerant of frozen oil is flowed into refrigerant purifier.When the liquid level of evaporator is higher and the condensation temperature and evaporating temperature of handpiece Water Chilling Units
When differing larger, takes liquid fully at this time and refrigerant refining effect is stronger, the freezing Chuck Steak in refrigerant purifier, so at this time may be used
To increase the opening time of oil return valve, to strengthen oil return effect；Conversely, the opening time of oil return valve can be shortened.Thus, it is possible to
The situation that oil-free is desirable during oil return is effectively avoided, effectively improves the reliability and high efficiency of oil return, and method is simple and practicable.
According to one embodiment of present invention, as shown in figure 4, controlled oil return valve according to liquid level and temperature gap can
Including：
S401 judges whether liquid level is more than or equal to default level threshold and whether temperature gap is poor more than or equal to preset temperature
It is worth threshold value.
Wherein, presetting level threshold and preset temperature difference threshold can be demarcated according to actual conditions.For example, default temperature
The value range for spending difference threshold can be 10~20 DEG C, generally take 15 DEG C.
Specifically, in order to enable taking the time of oil more reasonable, and oil-free during taking oil is effectively avoided to can use, caused
Refrigerant bypasses in vain and excessive refrigerant is inhaled into oil system, and prevents from taking oily time interval long, causes handpiece Water Chilling Units
The generation of the undesirable harm of oil return, can first judge whether the liquid level of evaporator is more than or equal to default level threshold, and judge to condense
Whether the temperature gap between temperature and evaporating temperature is more than or equal to preset temperature difference threshold.S402, if liquid level be more than etc.
In default level threshold and temperature gap is more than or equal to preset temperature difference threshold, then controls oil return valve every the first preset time
Open the second preset time.
Wherein, the first preset time and the second preset time can be demarcated according to actual conditions.For example, first it is default when
Between value range can be 150~600s, generally take 180s, the value range of the second preset time can be 20~60s, one
As take 30s.
Specifically, if the liquid level of the evaporator detected by liquid level sensor is in high liquid level state, i.e. evaporator
Liquid level be more than or equal to default level threshold, and the temperature gap between condensation temperature and evaporating temperature is more than or equal to default temperature
Difference threshold is spent, then when illustrating the freezing Chuck Steak in refrigerant purifier at this time, therefore can suitably increase the unlatching of oil return valve
Between, to strengthen oil return effect.
Specifically, being more than or equal to default level threshold, and condensation temperature and evaporating temperature in the liquid level for meeting evaporator
Between temperature gap be more than or equal to preset temperature difference threshold when, can control oil return valve every 180s open 30s time,
To strengthen oil return effect.
S403, if liquid level is less than default level threshold or temperature gap is less than preset temperature difference threshold, every
First preset time controls oil return valve and opens third preset time, wherein third preset time is less than the second preset time.
Wherein, third preset time can be demarcated according to actual conditions, for example, the value range of third preset time can
Think 10~30s, generally takes 10s.
Specifically, if the liquid level of the evaporator detected by liquid level sensor is in low liquid level state, i.e. evaporator
Liquid level be less than default level threshold, alternatively, the temperature gap between condensation temperature and evaporating temperature is less than preset temperature difference
Threshold value then illustrates that the refrigeration oil in refrigerant purifier at this time is less, therefore can suitably shorten the opening time of oil return valve.
Specifically, the liquid level for meeting evaporator be less than default level threshold or condensation temperature and evaporating temperature it
Between temperature gap be less than preset temperature difference threshold when, can control oil return valve every 180s open 10s time, with reduction
Oil return effect.
As a result, by the judgement of the temperature gap between the liquid level and condensation temperature and evaporating temperature to evaporator to returning
The opening time of fuel tap is suitably chosen, and can make handpiece Water Chilling Units takes oily opportunity more reasonable, avoids and takes oily mistake
Oil-free is desirable in journey, causes that refrigerant bypasses in vain and excessive refrigerant is inhaled into the harm of oil system, it is also possible to prevent from taking
Oily time interval is long, causes the undesirable harm of handpiece Water Chilling Units oil return so that entire oil return is relatively reliable, efficient and stable.
In conclusion the purification method for controlling oil return of the handpiece Water Chilling Units proposed according to embodiments of the present invention, is steamed by detecting
Liquid level, the condensation temperature of handpiece Water Chilling Units and the evaporating temperature of device are sent out, and obtains the temperature difference between condensation temperature and evaporating temperature
Value, and oil return valve is controlled according to liquid level and temperature gap, it is possible to prevente effectively from the desirable feelings of oil-free during oil return
Condition improves the reliability, high efficiency and stability of oil return, effectively improves the ability efficiency of handpiece Water Chilling Units, and method is simple and practicable.
In addition, the embodiment of the present invention also proposed a kind of non-transitorycomputer readable storage medium, it is stored thereon with
Computer program, the program realize the purification method for controlling oil return of above-mentioned handpiece Water Chilling Units when being executed by processor.
The non-transitorycomputer readable storage medium proposed according to embodiments of the present invention, by executing above-mentioned cooling-water machine
The purification method for controlling oil return of group carries out oil return according to the temperature gap of the liquid level of evaporator and condensation temperature and evaporating temperature
Control effectively avoids the situation that oil-free is desirable during oil return, improves the reliability, high efficiency and stability of oil return, effectively carry
The ability efficiency of high handpiece Water Chilling Units, and method is simple and practicable.
Fig. 2 is the structural schematic diagram of the handpiece Water Chilling Units of one embodiment of the invention.
As shown in Fig. 2, the handpiece Water Chilling Units may include：Compressor 1, condenser 2, evaporator 3, refrigerant purifier 4, injector
5, oil return valve 6, fuel tank 7 and control device (not specifically illustrated in figure).
Wherein, the air entry of compressor 1 is connected with the first refrigerant exit of evaporator 3, the exhaust outlet of compressor 1 and condensation
The refrigerant inlet of device 2 is connected.First refrigerant exit of condenser 2 is connected with the first refrigerant inlet of refrigerant purifier 4, and refrigerant carries
First refrigerant exit of pure device 4 is connected with the refrigerant inlet of evaporator 3, the second refrigerant exit and the refrigerant purifier 4 of evaporator 3
The second refrigerant inlet be connected；The refrigerant inlet of injector 5 is connected with the second refrigerant exit of condenser 2, and injector 5 enters oil
Mouth is connected with the oil outlet of refrigerant purifier 4, and the oil outlet of injector 5 is connected with fuel tank 7.Oil return valve 6 can be arranged in injection
Refrigerant inlet/oiler/oil outlet of device 5.Control device is used to detect liquid level, the condensation temperature of handpiece Water Chilling Units of evaporator 3
Degree and evaporating temperature, and the temperature gap between condensation temperature and evaporating temperature is obtained, and according to liquid level and temperature gap pair
Oil return valve 6 is controlled.
In one embodiment of the invention, control device can control oil return valve 6 according to liquid level and temperature gap
When processed, wherein control device may determine that whether liquid level is more than or equal to default level threshold and whether temperature gap is more than or equal to
Preset temperature difference threshold, if liquid level is more than or equal to default level threshold and temperature gap is more than or equal to preset temperature difference threshold
Value, control device then open the second preset time every the first preset time control oil return valve.
In one embodiment of the invention, if liquid level is less than default level threshold or temperature gap is less than default temperature
Difference threshold is spent, control device then opens third preset time every the first preset time control oil return valve, wherein third is default
Time is less than the second preset time.
In one embodiment of the invention, the value range of the first preset time is 150~600s, the second preset time
Value range be 20~60s, the value range of third preset time is 10~30s.
It should be noted that the explanation of the aforementioned purification method for controlling oil return embodiment to handpiece Water Chilling Units is also applied for
The handpiece Water Chilling Units of the embodiment, details are not described herein again.
The handpiece Water Chilling Units proposed according to embodiments of the present invention detect liquid level, the handpiece Water Chilling Units of evaporator by control device
Condensation temperature and evaporating temperature, and obtain the temperature gap between condensation temperature and evaporating temperature, and according to liquid level and temperature
Degree difference controls oil return valve, it is possible to prevente effectively from the desirable situation of oil-free during oil return, improve oil return reliability,
High efficiency and stability effectively improve the ability efficiency of handpiece Water Chilling Units, and method is simple and practicable.
In the description of the present invention, it is to be understood that, term "center", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on ... shown in the drawings or
Position relationship is merely for convenience of description of the present invention and simplification of the description, and does not indicate or imply the indicated device or element must
There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；Can be that machinery connects
It connects, can also be electrical connection；It can be directly connected, can also can be indirectly connected through an intermediary in two elements
The interaction relationship of the connection in portion or two elements, unless otherwise restricted clearly.For those of ordinary skill in the art
For, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature can be with "above" or "below" second feature
It is that the first and second features are in direct contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is directly under or diagonally below the second feature, or is merely representative of fisrt feature level height and is less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiments or example.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (9)
1. a kind of purification method for controlling oil return of handpiece Water Chilling Units, which is characterized in that the handpiece Water Chilling Units include compressor, condensation
Device, evaporator, refrigerant purifier, injector, oil return valve and fuel tank, the air entry of the compressor and the first of the evaporator
Refrigerant exit is connected, and the exhaust outlet of the compressor is connected with the refrigerant inlet of the condenser, and the first of the condenser is cold
Matchmaker outlet is connected with the first refrigerant inlet of the refrigerant purifier, the first refrigerant exit and the steaming of the refrigerant purifier
The refrigerant inlet for sending out device is connected, the second refrigerant inlet phase of the second refrigerant exit of the evaporator and the refrigerant purifier
Even, the refrigerant inlet of the injector is connected with the second refrigerant exit of the condenser, the oiler of the injector and institute
The oil outlet for stating refrigerant purifier is connected, and the oil outlet of the injector is connected with the fuel tank, and the oil return valve is arranged in institute
Refrigerant inlet/oiler/the oil outlet for stating injector, the described method comprises the following steps：
Detect the liquid level of the evaporator, the condensation temperature and evaporating temperature of the handpiece Water Chilling Units；
Obtain the temperature gap between the condensation temperature and the evaporating temperature；And
The oil return valve is controlled according to the liquid level and the temperature gap.
2. the purification method for controlling oil return of handpiece Water Chilling Units as described in claim 1, which is characterized in that described according to the liquid level
The oil return valve is controlled with the temperature gap, including：
Judge whether the liquid level is more than or equal to default level threshold and whether the temperature gap is poor more than or equal to preset temperature
It is worth threshold value；
If the liquid level is more than or equal to the default level threshold and the temperature gap is poor more than or equal to the preset temperature
It is worth threshold value, then controlling the oil return valve every the first preset time opens the second preset time.
3. the purification method for controlling oil return of handpiece Water Chilling Units as claimed in claim 2, which is characterized in that if the liquid level is less than
The default level threshold or the temperature gap are less than the preset temperature difference threshold, then when described first is default
Between control the oil return valve and open third preset time, wherein the third preset time is less than second preset time.
4. the purification method for controlling oil return of handpiece Water Chilling Units as claimed in claim 3, which is characterized in that first preset time
Value range be 150~600s, the value range of second preset time is 20~60s, the third preset time
Value range is 10~30s.
5. a kind of non-transitorycomputer readable storage medium, is stored thereon with computer program, which is characterized in that the program quilt
The purification method for controlling oil return of the handpiece Water Chilling Units as described in any in claim 1-4 is realized when processor executes.
6. a kind of handpiece Water Chilling Units, which is characterized in that including：
Compressor；
Condenser and evaporator, the air entry of the compressor are connected with the first refrigerant exit of the evaporator, the compression
The exhaust outlet of machine is connected with the refrigerant inlet of the condenser；
Refrigerant purifier, the first refrigerant exit of the condenser are connected with the first refrigerant inlet of the refrigerant purifier, institute
The first refrigerant exit for stating refrigerant purifier is connected with the refrigerant inlet of the evaporator, the second refrigerant exit of the evaporator
It is connected with the second refrigerant inlet of the refrigerant purifier；
Injector and fuel tank, the refrigerant inlet of the injector are connected with the second refrigerant exit of the condenser, the injection
The oiler of device is connected with the oil outlet of the refrigerant purifier, and the oil outlet of the injector is connected with the fuel tank；
Refrigerant inlet/oiler/oil outlet in the injector is arranged in oil return valve, the oil return valve；
Control device for detecting the liquid level of the evaporator, the condensation temperature and evaporating temperature of the handpiece Water Chilling Units, and obtains
Temperature gap between the condensation temperature and the evaporating temperature, and according to the liquid level and the temperature gap to described
Oil return valve is controlled.
7. handpiece Water Chilling Units as claimed in claim 6, which is characterized in that the control device is according to the liquid level and the temperature
When difference controls the oil return valve, wherein
The control device judges whether the liquid level is more than or equal to default level threshold and whether the temperature gap is more than etc.
In preset temperature difference threshold, if the liquid level is more than or equal to the default level threshold and the temperature gap is more than or equal to
The preset temperature difference threshold, it is default that the control device then controls the oil return valve unlatching second every the first preset time
Time.
8. handpiece Water Chilling Units as claimed in claim 7, which is characterized in that if the liquid level be less than the default level threshold or
Temperature gap described in person is less than the preset temperature difference threshold, and the control device is then controlled every first preset time
The oil return valve opens third preset time, wherein the third preset time is less than second preset time.
9. handpiece Water Chilling Units as claimed in claim 8, which is characterized in that the value range of first preset time be 150~
The value range of 600s, second preset time are 20~60s, and the value range of the third preset time is 10~30s.
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