CN204478643U - For the refrigeration system of refrigeration plant - Google Patents

Abstract

The utility model discloses a refrigeration system used for refrigeration equipment. The refrigeration system includes: a compressor, an evaporator and a temperature controller, and the temperature controller includes: a temperature sensing package; an evaporator temperature sensing tube; It is installed on the evaporator and used to sense the temperature of the evaporator. The temperature sensing tube of the evaporator is connected to the temperature sensing package; the external temperature sensing tube is used to sense the external ambient temperature of the refrigeration equipment. The external temperature sensing tube is connected to the temperature sensing tube The temperature sensing package is connected to the contact piece, and the temperature sensing package drives the contact piece to conduct or disconnect the compressor power supply circuit of the compressor through thermal expansion and contraction. According to the refrigerating system for refrigerating equipment in the embodiment of the present invention, the refrigerating system for refrigerating equipment does not need control buttons and manual adjustments, and the temperature control of the refrigerator is completely automatic. By setting an external temperature-sensing tube, it has a compensating effect on ambient temperature changes , can realize the precise temperature control of the refrigerator indoor temperature, and avoid the temperature deviation caused by manual adjustment.

Description

Refrigeration systems for refrigeration equipment

technical field

The utility model relates to the technical field of refrigeration, in particular to a refrigeration system for refrigeration equipment.

Background technique

At present, there are two types of temperature control in the refrigerator: mechanical temperature control and electronic temperature control. The electronic temperature control is automatic control with high control accuracy, but the system is complex and the reliability is low; the mechanical temperature control is manual adjustment control with simple structure and high reliability. High, but the control accuracy is low. Electronic temperature control is commonly used in high-end air-cooled refrigerators, while mechanical temperature control is mostly used in ordinary direct-cooling refrigerators.

Generally, when the refrigerator leaves the factory, the temperature control knob is set to the middle gear (MID), and the ambient temperature is about 25°C. When the user actually uses the refrigerator, the temperature control knob can be adjusted according to the local climate and the temperature in the room. When the ambient temperature becomes high, the knob is turned to the strong gear (MAX); when the ambient temperature becomes low, the knob is turned to the weak gear (MIN). ) direction rotation. However, manual adjustment of the knob often results in too large or too small an adjustment range, causing the temperature in the refrigerator to be too high or too low; and when the ambient temperature changes and the user forgets to adjust the knob, the temperature in the refrigerator will also be high or low.

Utility model content

The utility model aims to solve one of the above-mentioned technical problems in the prior art at least to a certain extent. Therefore, an object of the present utility model is to provide a refrigeration system for refrigeration equipment, which has a simple structure, can realize complete automation, and can avoid temperature deviation caused by manual adjustment.

The refrigeration system for refrigeration equipment according to the embodiment of the present invention includes: a compressor, an evaporator, and a temperature controller, and the temperature controller includes: a temperature sensing package; a temperature sensing tube of the evaporator, and the temperature sensing tube of the evaporator The tube is arranged on the evaporator and is used for sensing the temperature of the evaporator, and the temperature sensing tube of the evaporator is connected with the temperature sensing package; the external temperature sensing tube is used for sensing the temperature of the refrigeration The temperature of the external environment of the device, the external temperature sensing tube is connected with the temperature sensing package; and the contact sheet, the temperature sensing package is connected with the contact sheet, and the temperature sensing package drives the The contact strip conducts or disconnects the compressor power supply circuit of the compressor.

According to the refrigeration system used for refrigeration equipment in the embodiment of the utility model, by setting an external temperature sensing tube, the external temperature sensing tube senses the temperature of the external environment, and the contraction and expansion of the external temperature sensing tube can affect the contraction and expansion of the evaporator temperature sensing tube. Thus affecting the time for the contact piece to switch on and off the compressor. When the external ambient temperature is high, the compressor start-up time is prolonged and the downtime is shortened. When the external ambient temperature is low, the compressor startup time is shortened and the shutdown time is prolonged. The refrigerating system used for refrigerating equipment in the embodiment of the utility model does not need manual adjustment, can realize precise control of temperature, and avoids temperature deviation caused by manual adjustment.

In addition, the refrigeration system for refrigeration equipment according to the embodiment of the present utility model may also have the following additional technical features:

According to some embodiments of the present utility model, the temperature-sensing package includes: a bellows and a temperature-sensing working fluid filled in the bellows. The temperature-sensitive working medium in the bellows shrinks and expands according to the change of the sensed temperature, so that the bellows shrinks or expands, and drives the lever to move, so that the contact piece conducts or disconnects the power supply circuit of the compressor.

According to some embodiments of the present utility model, the bellows is configured in a corrugated shape. When the corrugated membrane box shrinks and expands, the length of the bellows can be significantly shortened and extended, thereby driving the lever to move, thereby controlling the contact or disconnection of the contact piece and the contact switch to control the start and stop of the compressor.

According to some embodiments of the present utility model, the temperature controller further includes: an intermediate driving mechanism, and the intermediate driving mechanism includes: a fulcrum, a lever and a driving rod. The lever is supported on the fulcrum, the first end of the lever is connected to the temperature-sensing envelope, and the temperature-sensing capsule shrinks and expands to push the lever, so that the lever drives the driving rod to move. The driving rod is connected to the second end of the lever, wherein the contact piece is connected to the driving rod. Therefore, the contact piece is in contact with or disconnected from the contact switch, and the on-off of the power supply circuit of the compressor is controlled.

According to some embodiments of the present invention, a contact switch is provided on the power supply circuit of the compressor, and the contact piece can be in contact with or disconnected from the contact switch. When the contact piece is in contact with the electric shock switch, the compressor works normally, and when the contact piece is disconnected from the electric shock switch, the compressor stops working.

According to some embodiments of the present utility model, at least a part of the external temperature sensing tube is exposed outside the refrigeration device. Thus, the external temperature sensing tube is used to sense the ambient temperature outside the refrigeration unit.

According to some embodiments of the present utility model, the temperature-sensing tube of the evaporator and the external temperature-sensing tube are both temperature-sensing capillary tubes. The temperature-sensing capillary has small pore size, high resistance, pressure equalization, and good thermal conductivity.

According to some embodiments of the present invention, the temperature-sensing working medium in the external temperature-sensing tube expands when the sensing temperature exceeds the preset temperature T, and contracts when the sensing temperature is lower than the preset temperature T. When the external ambient temperature is higher than the preset temperature T, the temperature-sensing working medium in the external temperature-sensing tube expands, thereby reducing the shrinkage of the evaporator temperature-sensing tube, increasing the expansion of the evaporator temperature-sensing tube, and compressing The start-up time of the machine is prolonged and the downtime is shortened; when the external ambient temperature is lower than the preset temperature T, the temperature-sensing working medium in the external temperature-sensing tube shrinks, thereby reducing the expansion effect of the evaporator temperature-sensing tube and increasing the evaporation The contraction effect of the temperature sensing tube of the compressor shortens the start-up time of the compressor and prolongs the downtime. Therefore, the external temperature-sensing tube can correct the temperature deviation from the preset temperature T.

According to some preferred embodiments of the present utility model, the preset temperature T is 25°C.

According to some embodiments of the present utility model, the outer temperature sensing tube is covered with a protective sleeve. Thereby protecting the external temperature sensing tube from damage.

Description of drawings

Fig. 1 is a schematic structural diagram of a refrigeration system for refrigeration equipment according to an embodiment of the present invention.

Reference signs:

Refrigeration system 100 for refrigeration equipment;

Compressor 1, contact switch 11;

Evaporator 2;

Thermostat 3, temperature sensing package 31, bellows 311; evaporator temperature sensing tube 32, external temperature sensing tube 33, intermediate driving mechanism 34, fulcrum 341, lever 342, driving rod 343, contact piece 35.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", Orientation indicated by "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation , so it cannot be interpreted as a limitation of the present utility model.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In this utility model, unless otherwise specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrated; it can be mechanically connected, or electrically connected, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components . Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model according to specific situations.

In the present invention, unless otherwise clearly specified and limited, a first feature being "on" or "below" a second feature may include direct contact between the first and second features, and may also include the first and second features being in direct contact with each other. The features are not in direct contact but through another feature between them. Moreover, the first feature being "above", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "beneath" and "under" the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

The following describes a refrigeration system 100 for refrigeration equipment according to an embodiment of the present invention with reference to FIG. 1 . The refrigeration system 100 for refrigeration equipment can be used in refrigerators to ensure that the indoor temperature of the refrigerator is within a set temperature range.

A refrigeration system 100 for refrigeration equipment according to an embodiment of the present utility model may include: a compressor 1 , an evaporator 2 and a temperature controller 3 .

Compressor 1 is the power of the refrigeration cycle. It can be driven by the motor to rotate continuously. In addition to timely extracting the steam in the evaporator to maintain low temperature and low pressure, it can also increase the pressure and temperature of the refrigerant vapor through compression, creating The conditions under which the heat of the refrigerant vapor is transferred to the external environment. That is, the low-temperature and low-pressure refrigerant vapor is compressed to a high-temperature and high-pressure state, so that the refrigerant vapor can be condensed by using normal temperature air or water as the cooling medium.

Evaporator 2 is a heat exchange device. The throttling low-temperature and low-pressure refrigerant liquid evaporates (boils) into steam, absorbs the heat of the cooled substance, and lowers the temperature of the substance to achieve the purpose of freezing and refrigerating food.

The temperature controller 3 can be used to control the temperature in the refrigerator within a certain range. According to the refrigerating system 100 for refrigerating equipment according to the embodiment of the present invention, the temperature controller 3 may include: a temperature sensing package 31 , an evaporator temperature sensing tube 32 , an external temperature sensing tube 33 and a contact piece 35 .

As shown in FIG. 1 , the temperature sensing package 31 can be connected with the evaporator temperature sensing tube 32 , the external temperature sensing tube 33 and the lever 342 . The temperature sensing package 31 can drive the lever 342 through thermal expansion and contraction, and then control the contact piece 35 to conduct or disconnect the compressor power supply circuit of the compressor.

The evaporator temperature sensing tube 32 can be arranged on the evaporator 2 and used for sensing the surface temperature of the evaporator 2 , in other words, the evaporator temperature sensing tube 32 is connected between the temperature sensing package 31 and the evaporator 2 . The external temperature-sensing tube 33 can be used to sense the external ambient temperature of the refrigeration equipment, and the external temperature-sensing tube 33 can be connected with the temperature-sensing package 31 .

When the ambient temperature of the refrigerator is the preset temperature and remains constant, the external temperature sensing tube 33 does not work, and only the evaporator temperature sensing tube 32 controls the start and stop of the compressor 1 according to the temperature change on the surface of the evaporator 2 .

When the ambient temperature of the refrigerator deviates from the preset temperature and changes with time, the evaporator temperature-sensing tube 32 and the external temperature-sensing tube 33 can simultaneously drive the compressor 1 to start and stop, wherein the evaporator temperature-sensing tube 32 plays a main role, and the external temperature sensing tube 33 plays an auxiliary role.

For example, when the ambient temperature is higher than the preset temperature, the refrigerator is turned on for cooling, and the surface temperature of the evaporator 2 drops. The contraction of the working medium in the tube 32 causes the refrigerator to continue cooling for a period of time before shutting down; when the refrigerator is shut down and the surface temperature of the evaporator 2 rises, due to the expansion of the working medium in the external temperature-sensing tube 33, the temperature of the evaporator increases. The expansion of the working fluid in the tube 32 causes the compressor 1 to be started in advance before the surface temperature of the evaporator 2 reaches the start-up point.

When the ambient temperature is lower than the preset temperature, the refrigerator is turned on for cooling, and the surface temperature of the evaporator 2 drops. Due to the shrinkage of the working medium in the external temperature-sensing tube 33, the contraction of the working medium in the evaporator temperature-sensing tube 32 is increased, resulting in The refrigerator shuts down early before the surface temperature of the evaporator 2 reaches the shutdown point. When the refrigerator is shut down and the surface temperature of the evaporator 2 rises, due to the contraction of the working medium in the external temperature-sensing tube 33, the expansion of the working medium in the evaporator temperature-sensing tube 33 is reduced, causing the refrigerator to continue to shut down for a period of time before starting .

To sum up, according to the refrigeration system 100 for refrigeration equipment according to the embodiment of the present utility model, when the ambient temperature is higher than the preset temperature, the startup time of the refrigerator is prolonged and the shutdown time is shortened. When the ambient temperature is lower than the preset temperature, the start-up time of the refrigerator will be shortened and the downtime will be prolonged. The refrigeration system 100 for refrigeration equipment does not need control buttons and manual adjustments, and the temperature control of the refrigerator is fully automated. By setting the external temperature sensing tube 33, it has a compensating effect on ambient temperature changes, and can realize accurate temperature control of the refrigerator indoor temperature, avoiding manual operation. Temperature deviation caused by regulation.

According to some embodiments of the present invention, the temperature-sensing package 31 may include a bellows 311 and a temperature-sensing working medium filled in the bellows 311 . The temperature-sensitive working medium filled in the bellows 311 can have good expansion and contraction performance, large heat capacity and good stability, and is safe and reliable with little environmental pollution. Therefore, when the temperature sensing tube senses a temperature change, it can have a significant contraction and expansion effect.

Preferably, the bellows 311 can be configured in a corrugated shape. When the temperature-sensitive working medium filled in the bellows 311 shrinks, the length direction of the corrugated bellows 311 can be significantly shortened. When the temperature-sensitive working fluid filled in the bellows 311 When the mass expands, the length direction of the bellows 311 can be obviously elongated, so that the lever 342 can be pushed to move to control the on-off of the power supply circuit of the compressor.

According to some embodiments of the present utility model, the thermostat 3 may further include an intermediate driving mechanism 34 , wherein the intermediate driving mechanism 34 may include: a fulcrum 341 , a lever 342 and a driving rod 343 . As shown in Figure 1, the lever 342 is supported on the fulcrum 341 and the first end (for example, the upper right end among Fig. Left lower end) links to each other with driving rod 343, and contact piece 35 can be connected on the driving rod 343.

As a preferred embodiment, a contact switch 11 may be provided on the power supply circuit of the compressor, and the contact piece 35 may be in contact with or disconnected from the contact switch 11, thereby controlling the on-off of the power supply circuit of the compressor.

When the refrigerator is turned on for cooling, the surface temperature of the evaporator 2 drops, the working fluid in the bellows 311 shrinks, the length of the bellows 311 shortens, and the lever 342 is pushed to move, and the lever 342 drives the driving rod 343 at the same time, and the contact piece 35 is disconnected from the contact switch 11 , the power supply circuit of the compressor is disconnected, and the compressor 1 stops working. When the compressor 1 stops, the temperature of the evaporator 2 rises, the working medium in the capsule 311 expands, the length of the capsule 311 is lengthened, and the contact piece 35 is connected to the contact switch 11 , the power supply circuit of the compressor is turned on, and the compressor 1 starts up.

According to some embodiments of the present invention, at least a part of the external temperature sensing tube 33 may be exposed outside the refrigeration device. Thus, the external temperature-sensing tube 33 can sense the temperature of the external environment, and expand and contract according to the height of the external environment.

As a preferred embodiment, the temperature-sensing working fluid in the external temperature-sensing tube 33 can expand when the sensing temperature exceeds the preset temperature T, and can contract when the sensing temperature is lower than the preset temperature T. Therefore, when the external ambient temperature is the preset temperature T, the external temperature sensing tube 33 does not work. When the external ambient temperature deviates from the preset temperature T, the working medium in the external temperature sensing tube 33 expands according to the external ambient temperature being higher than the preset temperature T, thereby prolonging the start-up time of the compressor 1 and shortening the shutdown time; When the temperature is lower than the preset temperature T, the working medium in the external temperature-sensing tube 33 shrinks, so that the compressor 1 starts up for a shorter period of time and prolongs the downtime for the compressor 1 .

Preferably, the preset temperature T may be 25°C. Normal temperature or room temperature is generally defined as 25°C, that is, under normal conditions, the difference between the external ambient temperature of the refrigeration system 100 used for refrigeration equipment and 25°C is small, thereby reducing the large deviation between the external ambient temperature and the preset temperature. unnecessary consumption.

According to some embodiments of the present invention, both the evaporator temperature-sensing tube 32 and the external temperature-sensing tube 33 can be temperature-sensing capillary tubes. The temperature-sensing capillary has good thermal conductivity, thereby accurately sensing the surface temperature of the evaporator 2 and the temperature of the external environment, so that the working medium in the evaporator temperature-sensing tube 32 and the external temperature-sensing tube 33 shrinks and expands according to the temperature change.

According to some preferred embodiments of the present invention, a protective sheath can be sheathed on the external temperature sensing tube 33 . The external temperature sensing tube 33 can be partially exposed on the outside of the refrigeration equipment to sense the external ambient temperature, and the protective cover can be used to protect the external temperature sensing tube to prevent the external temperature sensing tube from being damaged by the external environment, thereby prolonging the service life of the temperature sensing tube and reducing the external temperature. The replacement of the temperature sensing tube 33 saves cost.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structures, materials or features are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and should not be construed as limitations of the present invention, and those skilled in the art are within the scope of the present invention. Variations, modifications, substitutions and variations can be made to the above-described embodiments.

Claims (10)

1. A refrigeration system for refrigeration equipment, characterized in that, the refrigeration system comprises: a compressor, an evaporator and a thermostat, and the thermostat comprises: Temperature sensor package; An evaporator temperature-sensing tube, the evaporator temperature-sensing tube is arranged on the evaporator and used to sense the temperature of the evaporator, and the evaporator temperature-sensing tube is connected to the temperature-sensing package; An external temperature sensing tube, the external temperature sensing tube is used to sense the external ambient temperature of the refrigeration equipment, and the external temperature sensing tube is connected to the temperature sensing package; and The contact piece, the temperature-sensing package is connected with the contact piece, and the temperature-sensing package drives the contact piece to conduct or disconnect the compressor power supply circuit of the compressor through thermal expansion and contraction. 2 . The refrigeration system for refrigeration equipment according to claim 1 , wherein the temperature-sensing package comprises: a bellows and a temperature-sensing working medium filled in the bellows. 3 . 3. The refrigerating system for refrigerating equipment according to claim 2, wherein the bellows is configured in a corrugated shape. 4. The refrigeration system for refrigeration equipment according to claim 1, wherein the thermostat further comprises: The intermediate drive mechanism, the intermediate drive mechanism includes: fulcrum; a lever, the lever is supported on the fulcrum, and the first end of the lever is connected to the temperature sensing package; a driving rod, the driving rod is connected to the second end of the lever, wherein the contact piece is connected to the driving rod. 5 . The refrigeration system for refrigeration equipment according to claim 4 , wherein a contact switch is provided on the power supply circuit of the compressor, and the contact piece can be in contact with or disconnected from the contact switch. 6 . 6 . The refrigeration system for refrigeration equipment according to claim 1 , wherein at least a part of the external temperature sensing tube is exposed outside the refrigeration equipment. 7 . 7 . The refrigeration system for refrigeration equipment according to claim 1 , wherein the evaporator temperature-sensing tube and the external temperature-sensing tube are both temperature-sensing capillary tubes. 8. The refrigerating system for refrigerating equipment according to claim 1, characterized in that, the sensing temperature of the temperature-sensing working medium in the external temperature-sensing tube expands after exceeding the preset temperature T, and is lower than the preset temperature T back contraction. 9. The refrigeration system for refrigeration equipment according to claim 8, wherein the preset temperature T is 25°C. 10. The refrigerating system for refrigerating equipment according to claim 1, characterized in that a protective sleeve is placed on the external temperature sensing tube.