CN115654787A - Humidity control method of refrigeration equipment - Google Patents
Humidity control method of refrigeration equipment Download PDFInfo
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- CN115654787A CN115654787A CN202211319750.6A CN202211319750A CN115654787A CN 115654787 A CN115654787 A CN 115654787A CN 202211319750 A CN202211319750 A CN 202211319750A CN 115654787 A CN115654787 A CN 115654787A
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- humidity
- capillary tube
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- evaporation fan
- duty ratio
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000001704 evaporation Methods 0.000 claims abstract description 48
- 230000008020 evaporation Effects 0.000 claims abstract description 48
- 239000003507 refrigerant Substances 0.000 claims abstract description 18
- 230000000694 effects Effects 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 17
- 238000010586 diagram Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The invention provides a humidity control method of refrigeration equipment, the refrigeration equipment comprises an evaporation fan, and a compressor, a condenser, a filter, a capillary tube and an evaporator which are sequentially connected, an electromagnetic valve for controlling the flow direction of a refrigerant is connected between the capillary tube and the filter, the capillary tube comprises a first capillary tube and a second capillary tube which are arranged in parallel, the flow rate of the first capillary tube is greater than that of the second capillary tube, and the humidity control method comprises the following steps: acquiring a value of set humidity RH; if the set humidity RH is more than or equal to 75%, controlling the electromagnetic valve to open a switch on one side of the first capillary tube and close a switch on one side of the second capillary tube; and if the set humidity RH is less than 75%, controlling the electromagnetic valve to open the switch on one side of the second capillary tube and close the switch on one side of the first capillary tube. According to the invention, the flow direction of the refrigerant is controlled according to the set humidity RH by arranging the capillary tube with one large capillary tube and one small capillary tube, so that the humidity control is carried out, the cost is saved, and the humidity control effect is good.
Description
Technical Field
The invention relates to the technical field of refrigeration equipment, in particular to a humidity control method of refrigeration equipment.
Background
At present, for humidity control of a refrigeration chamber, a variable frequency compressor is generally adopted, starting and stopping time of the compressor is changed by changing the running frequency of the compressor, or delay time of an evaporation fan and closing of an air door are adopted, so that the aim of humidity control is fulfilled.
The humidity in the refrigerating room is controlled by the variable frequency compressor, so that the cost of the whole machine is high; when the humidity control in a refrigerating room is realized through a fixed-frequency compressor, in order to achieve the balance between the humidity and the temperature, in the case of high humidity, in order to improve the humidity as much as possible, starting is carried out for a plurality of times between the starting point temperature and the stopping point temperature of the compressor, so that the temperature in a box is step-shaped; and the temperature fluctuation in the box is large when the humidity is low.
Therefore, there is a need for a method of humidity control that is low in cost and can also provide both temperature and humidity.
Disclosure of Invention
The invention aims to provide a humidity control method of refrigeration equipment, wherein a capillary tube of the refrigeration equipment is divided into a first capillary tube with larger flow and a second capillary tube with smaller flow, a refrigerant flows to the first capillary tube with larger flow or the second capillary tube with smaller flow through an electromagnetic valve according to the set humidity, so as to control the humidity in a refrigeration chamber, the refrigeration equipment is only additionally provided with the electromagnetic valve, a tee joint and the capillary tube, the structure is simple, the humidity control effect is obvious, and the problem that the cost is high or the temperature and the humidity cannot be considered during the humidity control in the prior art is solved.
In order to achieve one of the above objects, an embodiment of the present invention provides a humidity control method for a refrigeration apparatus, where the refrigeration apparatus includes an evaporation fan, and a compressor, a condenser, a filter, a capillary tube, and an evaporator connected in sequence, where an electromagnetic valve for controlling a flow direction of a refrigerant is connected between the capillary tube and the filter, the capillary tube includes a first capillary tube and a second capillary tube arranged in parallel, a flow rate of the first capillary tube is greater than a flow rate of the second capillary tube, and the humidity control method includes:
acquiring a value of set humidity RH;
if the set humidity RH is more than or equal to 75%, controlling the electromagnetic valve to open a switch on one side of the first capillary tube and close a switch on one side of the second capillary tube; and if the set humidity RH is less than 75%, controlling the electromagnetic valve to open the switch on one side of the second capillary tube and close the switch on one side of the first capillary tube.
As a further improvement of an embodiment of the present invention, the set humidity RH needs to satisfy: RH is between 60% and 90%.
As a further improvement of an embodiment of the present invention, the set humidity RH adjusts the duty ratio of the evaporation fan with a humidity gradient of 5%, and the duty ratio of the evaporation fan increases with the increase of the set humidity RH.
As a further improvement of an embodiment of the present invention, when the set humidity RH is 75% RH or more and 90% RH or less, the duty ratio of the evaporation fan is controlled to increase with the increase of the set humidity RH.
As a further improvement of an embodiment of the present invention,
when the set humidity RH is more than or equal to 75% and less than 80%, controlling the duty ratio of the evaporation fan to be 50%;
when the set humidity RH is more than or equal to 80% and less than 85%, controlling the duty ratio of the evaporation fan to be 70%;
when the set humidity RH is more than or equal to 85% and less than 90%, the duty ratio of the evaporation fan is controlled to be 100%.
As a further improvement of an embodiment of the present invention, when the set humidity RH is 60% RH < 75%, the duty ratio of the evaporation fan is controlled to increase with the increase of the set humidity RH.
As a further improvement of an embodiment of the present invention,
when the set humidity RH is more than or equal to 70% and RH is less than 75%, controlling the duty ratio of the evaporation fan to be 100%;
when the set humidity RH is more than or equal to 65% and less than 70% RH, controlling the duty ratio of the evaporation fan to be 70%;
when the set humidity RH is more than or equal to 60% and less than 65%, the duty ratio of the evaporation fan is controlled to be 50%.
As a further improvement of the embodiment of the present invention, two evaporators are provided in parallel, and the two evaporators are respectively a first evaporator and a second evaporator, the first evaporator is connected to the first capillary, and the second evaporator is connected to the second capillary.
In a further improvement of an embodiment of the present invention, the flow rate of the first capillary is 8L/min, and the flow rate of the second capillary is 5L/min.
As a further improvement of an embodiment of the present invention, the evaporator, the first capillary tube, and the second capillary tube are connected by a tee.
One or more technical schemes provided by the invention at least have the following technical effects or advantages:
in the humidity control method of the refrigeration equipment, one capillary tube is replaced by two capillary tubes with one flow rate being larger and one flow rate being smaller in a refrigeration system of the refrigeration equipment, an electromagnetic valve is connected to a drying filter, and then the electromagnetic valve controls a refrigerant to flow to a first capillary tube with the larger flow rate or a second capillary tube with the smaller flow rate. When the set humidity RH is larger, the control electromagnetic valve is communicated with the electromagnetic valve with larger flow, the flow of the refrigerant flowing through the capillary tube in unit time is larger, more heat in the refrigerating chamber is absorbed, and the water vapor in the refrigerating chamber is quickly condensed into water drops on the evaporator; when the set humidity RH is smaller, the control electromagnetic valve is communicated with the electromagnetic valve with smaller flow, the flow of the refrigerant flowing through the capillary tube in unit time is smaller, the heat absorbed in the refrigerating chamber is less, the working time of the compressor is prolonged, namely the refrigerating time is increased, so that the time for condensing the water vapor in the refrigerating chamber into water drops on the evaporator is increased, and the more water drops are adsorbed on the evaporator in one working period of the compressor. The improved refrigeration equipment has a simple improved structure, and the improved refrigeration equipment has an obvious humidity control effect.
Drawings
Fig. 1 is a schematic structural diagram of a refrigeration apparatus in an embodiment of the present invention.
Fig. 2 is a schematic diagram of a refrigeration apparatus refrigeration system in an embodiment of the present invention.
Fig. 3 is a flow chart of a humidity control method of a refrigeration apparatus in an embodiment of the present invention.
1. A compressor; 2. a condenser; 3. a filter; 4. an electromagnetic valve; 51. a first capillary tube; 52. a second capillary; 6. an evaporator; 7. and a tee joint.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As used herein, terms such as "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, denote the relative position in space, and are used for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. The spatially relative positional terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Also, it should be understood that, although the terms first, second, etc. may be used herein to describe various elements or structures, these described elements should not be limited by these terms. These terms are only used to distinguish these descriptive objects from one another. For example, the first capillary may be referred to as the second capillary, and similarly the second capillary may also be referred to as the first capillary, without departing from the scope of the present application.
The first embodiment of the present invention provides a humidity control method for a refrigeration device, as shown in fig. 1, the refrigeration device includes an evaporation fan, a refrigeration system of the refrigeration device includes a compressor 1, a condenser 2, a filter 3, a capillary tube and an evaporator 6, which are sequentially connected, in addition, an electromagnetic valve 4 is connected between the capillary tube and the filter 3, the capillary tube includes a first capillary tube 51 and a second capillary tube 52, which are arranged in parallel, a flow rate of the first capillary tube 51 is greater than a flow rate of the second capillary tube 52, a refrigerant in the refrigeration system flows in an arrow direction shown in fig. 1, and the electromagnetic valve 4 can control the refrigerant in the refrigeration system to flow to the first capillary tube 51 with a greater flow rate or the first capillary tube 51 with a smaller flow rate. In this embodiment, the first capillary tube 51, the second capillary tube 52, and the evaporator 6 are connected by the tee joint 7, that is, the refrigerant flows through the first capillary tube 51 or the second capillary tube 52, and then flows to the evaporator 6 through the tee joint 7.
The humidity control method of the refrigeration equipment is based on the structure and comprises the following steps:
acquiring a value of set humidity RH;
if the set humidity RH is more than or equal to 75%, controlling the electromagnetic valve 4 to open a switch at one side of the first capillary 51 and close a switch at one side of the second capillary 52; if the set humidity RH is less than 75%, the solenoid valve 4 is controlled to open the switch on the second capillary 52 side and close the switch on the first capillary 51 side.
When the refrigerant in the refrigeration system flows to the first capillary 51 with larger flow through the electromagnetic valve 4, the refrigeration capacity generated in unit time is larger due to the larger flow of the first capillary 51, and more heat in the refrigeration chamber can be absorbed; under the same temperature difference, the required refrigeration time is shorter, so that the time for the water vapor in the refrigeration chamber to circulate in the refrigeration chamber and the air duct is shortened, the time for the water vapor in the refrigeration chamber to flow through the evaporator 6 is shortened, the water vapor in the refrigeration chamber is less attached to the low-temperature evaporator 6, and the humidity in the refrigeration chamber is less reduced in the starting time of the compressor 1. After the compressor 1 is stopped, a small amount of water drops or frost on the evaporator 6 is evaporated again into water vapor and blown to the refrigerating chamber under the drive of the evaporation fan, so that the refrigerant in the refrigerating system is suitable for the condition of high humidity (the set humidity RH is more than or equal to 75%) when flowing through the first capillary tube 51.
When the refrigerant in the refrigeration system flows to the second capillary tube 52 with smaller flow through the electromagnetic valve 4, the amount of cold generated in unit time is less because the flow of the second capillary tube 52 is smaller, and the amount of heat absorbed in the refrigeration chamber is less; under the same temperature difference, the required refrigeration time is longer, so that the time for the water vapor in the refrigeration chamber to circulate in the refrigeration chamber and the air duct is increased, the time for the water vapor in the refrigeration chamber to flow through the evaporator 6 is increased, a large amount of water vapor in the refrigeration chamber is attached to the low-temperature evaporator 6 and is condensed into water drops or frost, and the humidity in the refrigeration chamber is greatly reduced in the starting time of the compressor 1. When the compressor 1 is stopped, the air of the evaporation fan cannot completely evaporate and blow the condensed water drops or frost on the evaporator 6 to the refrigeration compartment, so that the humidity cannot be completely raised, and therefore, the refrigerant in the refrigeration system is suitable for the low humidity (the set humidity RH is less than 75%) condition when flowing through the second capillary tube 52.
The humidity setting of the humidity control method is between 60% and 90%, and the humidity control method is divided into a high humidity interval and a low humidity interval by taking 75% as a limit. However, if only the refrigerant in the refrigeration system is controlled to flow to the first capillary tube 51 or the second capillary tube 52, after the flow direction of the refrigerant is determined, in one working cycle of the compressor 1, since the flow rate of the refrigerant is determined, the humidity change in the refrigeration compartment is also determined, after a plurality of working cycles of the compressor 1, the humidity in the refrigeration compartment tends to be stable, the difference between the maximum humidity and the minimum humidity of the high humidity region and the low humidity region is 15%, the humidity difference range is large, and the error between the humidity in the refrigeration compartment and the set temperature RH is large.
In order to solve the above problem, the present embodiment adjusts the duty ratio of the evaporation fan, and gradually increases the duty ratio of the evaporation fan with the increase of the set humidity RH.
When the compressor 1 is started, the refrigeration equipment refrigerates, and the humidity in the refrigeration chamber is reduced; when the compressor 1 is stopped, when the duty ratio of the evaporation fan is larger, in the working period of the evaporation fan, the working time of the evaporation fan is longer, namely, the cold air circulation time in the refrigerating chamber is longer, because the air speed can promote evaporation, frost on fins of the evaporator 6 is easier to be sublimated into water vapor to enter the refrigerating chamber along with the cold air again under the flowing of the cold air for a longer time, and the humidity value of the refrigerating chamber is improved.
On the contrary, when the duty ratio of the evaporation fan is smaller, in the working period of the evaporation fan, the working time of the evaporation fan is shorter, that is, the time of the cold air circulation in the refrigeration compartment is shorter, that is, the time of the cold air flowing through the fins of the evaporator 6 is shorter, the frost on the evaporator 6 is more difficult to be sublimated into water vapor, and the frost enters the refrigeration compartment again along with the cold air, and the humidity value of the refrigeration compartment is improved less.
Further, the set humidity RH takes 5% as a humidity gradient to adjust the duty ratio of the evaporation fan.
Specifically, when the set humidity RH belongs to a high humidity condition (75% or more and 90% or less of the set humidity RH), the duty ratio of the evaporation fan corresponding to each humidity gradient is set as follows:
when the set humidity RH is more than or equal to 75% and less than 80%, controlling the duty ratio of the evaporation fan to be 50%;
when the set humidity RH is more than or equal to 80% and less than 85%, controlling the duty ratio of the evaporation fan to be 70%;
when the set humidity RH is more than or equal to 85% and less than or equal to 90%, the duty ratio of the evaporation fan is controlled to be 100%.
When the set humidity RH belongs to a low humidity condition (60% is less than or equal to the set humidity RH less than 75%), the duty ratio of the evaporation fan corresponding to each humidity gradient is set as follows:
when the set humidity RH is more than or equal to 70% and RH is less than 75%, controlling the duty ratio of the evaporation fan to be 100%;
when the set humidity RH is more than or equal to 65% and less than 70% RH, controlling the duty ratio of the evaporation fan to be 70%;
when the set humidity RH is more than or equal to 60% and less than 65%, the duty ratio of the evaporation fan is controlled to be 50%.
After determining whether the control electromagnetic valve 4 flows to the first capillary 51 with larger flow or the second capillary 52 with smaller flow according to the set humidity RH, the duty ratio of the evaporation fan is adjusted according to the interval of the set humidity RH. After the flow rate of the capillary tube and the duty ratio of the evaporation fan are determined, the difference value between the maximum value and the minimum value of the humidity in the refrigerating chamber is basically fixed in one working period of the compressor 1, and after a plurality of working periods of the compressor 1, the humidity in the refrigerating chamber is changed in a basically stable temperature interval. The duty ratio of the evaporation fan is determined according to the interval where the set humidity RH is located, so that the humidity in the refrigerating chamber fluctuates near the set humidity RH.
Further, the flow rate of the first capillary 51 was 8L/min, and the flow rate of the second capillary 52 was 5L/min. The evaporators 6 may be arranged in parallel, and are respectively a first evaporator and a second evaporator, the first evaporator is connected to the first capillary 51, the second evaporator is connected to the second capillary 52, and only one evaporator is taken as an example in the embodiment.
It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.
Claims (10)
1. The utility model provides a wet method of accuse of refrigeration plant, refrigeration plant includes evaporation fan and the compressor, condenser, filter, capillary and the evaporimeter that connect gradually, its characterized in that, the capillary with be connected with the solenoid valve of control refrigerant flow direction between the filter, the capillary includes parallelly connected first capillary and the second capillary that sets up, the flow of first capillary is greater than the flow of second capillary, wet method of accuse includes:
acquiring a value of set humidity RH;
if the set humidity RH is more than or equal to 75%, controlling the electromagnetic valve to open a switch on one side of the first capillary tube and close a switch on one side of the second capillary tube; and if the set humidity RH is less than 75%, controlling the electromagnetic valve to open the switch on one side of the second capillary tube and close the switch on one side of the first capillary tube.
2. A method for controlling humidity in a refrigeration apparatus as set forth in claim 1, wherein the set humidity RH is set to satisfy: RH is between 60% and 90%.
3. The humidity control method of a refrigerating apparatus as claimed in claim 2, wherein the set humidity RH adjusts the duty ratio of the evaporation fan with a humidity gradient of 5%, and the duty ratio of the evaporation fan increases with the increase of the set humidity RH.
4. The humidity control method of a refrigerating apparatus as claimed in claim 2, wherein when the set humidity RH is 75% RH 90%, the duty ratio of the evaporation fan is controlled to increase with the increase of the set humidity RH.
5. The humidity control method of a refrigerating apparatus as set forth in claim 4,
when the set humidity RH is more than or equal to 75% and less than 80%, controlling the duty ratio of the evaporation fan to be 50%;
when the set humidity RH is more than or equal to 80% and less than 85%, controlling the duty ratio of the evaporation fan to be 70%;
when the set humidity RH is more than or equal to 85% and less than or equal to 90%, the duty ratio of the evaporation fan is controlled to be 100%.
6. The humidity control method of a refrigerating device as recited in claim 2, wherein when the set humidity RH is 60% RH < 75%, the duty ratio of the evaporation fan is controlled to increase with the increase of the set humidity RH.
7. The humidity control method of a refrigerating apparatus as set forth in claim 6,
when the set humidity RH is more than or equal to 70% and RH is less than 75%, controlling the duty ratio of the evaporation fan to be 100%;
when the set humidity RH is more than or equal to 65% and less than 70% RH, controlling the duty ratio of the evaporation fan to be 70%;
when the humidity RH is set to be more than or equal to 60% and less than 65%, the duty ratio of the evaporation fan is controlled to be 50%.
8. The humidity control method of a refrigerating apparatus as claimed in claim 1, wherein two evaporators are provided in parallel, respectively a first evaporator and a second evaporator, the first evaporator is connected to the first capillary tube, and the second evaporator is connected to the second capillary tube.
9. The humidity control method of a refrigerating apparatus as claimed in claim 1, wherein the flow rate of the first capillary tube is 8L/min and the flow rate of the second capillary tube is 5L/min.
10. The humidity control method of a refrigerating apparatus as recited in claim 1, wherein the evaporator, the first capillary tube and the second capillary tube are connected by a tee.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211319750.6A CN115654787A (en) | 2022-10-26 | 2022-10-26 | Humidity control method of refrigeration equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211319750.6A CN115654787A (en) | 2022-10-26 | 2022-10-26 | Humidity control method of refrigeration equipment |
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| Publication Number | Publication Date |
|---|---|
| CN115654787A true CN115654787A (en) | 2023-01-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211319750.6A Pending CN115654787A (en) | 2022-10-26 | 2022-10-26 | Humidity control method of refrigeration equipment |
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| Country | Link |
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| CN (1) | CN115654787A (en) |
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- 2022-10-26 CN CN202211319750.6A patent/CN115654787A/en active Pending
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