CN219473996U - Refrigerating system capable of adjusting flow of refrigerant and refrigerator - Google Patents
Refrigerating system capable of adjusting flow of refrigerant and refrigerator Download PDFInfo
- Publication number
- CN219473996U CN219473996U CN202320250935.XU CN202320250935U CN219473996U CN 219473996 U CN219473996 U CN 219473996U CN 202320250935 U CN202320250935 U CN 202320250935U CN 219473996 U CN219473996 U CN 219473996U
- Authority
- CN
- China
- Prior art keywords
- temperature sensor
- evaporator
- flow valve
- outlet
- inlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
Landscapes
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The application provides a refrigerating system and refrigerator of adjustable refrigerant flow, refrigerating system includes: the device comprises a compressor, a condenser, a capillary tube, an evaporator, an electronic flow valve, a first temperature sensor, a second temperature sensor and a controller; the compressor is provided with an exhaust pipe and an air return pipe, the exhaust pipe is connected with an inlet of the condenser, and an outlet of the condenser is connected with an inlet of the electronic flow valve; the outlet of the electronic flow valve is connected with the inlet of the capillary tube, and the outlet of the capillary tube is connected with the inlet of the evaporator; the outlet of the evaporator is connected with an air return pipe; the first temperature sensor is arranged at the inlet of the evaporator, the second temperature sensor is arranged at the outlet of the evaporator, and the first temperature sensor and the second temperature sensor are respectively connected with the controller; the controller is connected with the electronic flow valve. The refrigerating system detects the inlet and outlet temperatures of the evaporator through the controller and controls the electronic flow valve so as to solve the problems of low working efficiency and higher energy consumption of the refrigerator refrigerating system in the operation process.
Description
Technical Field
The application relates to the technical field of refrigerator refrigeration, in particular to a refrigeration system capable of adjusting flow of a refrigerant and a refrigerator.
Background
A refrigerator is a type of refrigerating apparatus that maintains a constant low temperature. Also a product for keeping food or other articles in a constant low temperature cold state, a refrigerator for storing food in a fresh state. The refrigerator mainly realizes refrigeration through a refrigerating system.
The refrigerator refrigerating system mainly uses the capillary tube as the throttling element, the capillary tube adopts fixed flow when in design, can not be matched with the refrigerating running state of the refrigerator, and can not timely adjust the flow of the refrigerant flowing into the evaporator from the capillary tube along with the change of the working state of the refrigerator, so that the refrigerator adopting the capillary tube can not keep the high-efficiency running of the refrigerating system in the running process of the refrigerating system, and the energy consumption of the refrigerator is increased.
Disclosure of Invention
The application provides a refrigerating system and refrigerator with adjustable refrigerant flow to solve the problem that refrigerator refrigerating system work efficiency is low in the operation in-process, and the energy consumption is higher.
In a first aspect, the present application provides a refrigeration system with adjustable refrigerant flow, the refrigeration system comprising: the device comprises a compressor, a condenser, a capillary tube, an evaporator, an electronic flow valve, a first temperature sensor, a second temperature sensor and a controller;
the compressor is provided with an exhaust pipe and an air return pipe, the exhaust pipe is connected with the inlet of the condenser, and the outlet of the condenser is connected with the inlet of the electronic flow valve; the outlet of the electronic flow valve is connected with the inlet of the capillary tube, and the outlet of the capillary tube is connected with the inlet of the evaporator; the outlet of the evaporator is connected with the air return pipe;
the first temperature sensor is arranged at the inlet of the evaporator, the second temperature sensor is arranged at the outlet of the evaporator, and the first temperature sensor and the second temperature sensor are respectively connected with the controller; the controller is connected with the electronic flow valve.
The first temperature sensor and the second temperature sensor are used for detecting the temperatures of the inlet and the outlet of the evaporator, and the controller controls the opening of the electronic flow valve according to the temperatures of the inlet and the outlet of the evaporator so as to improve the running efficiency of the refrigerating system.
Optionally, the electronic flow valve further comprises an electronic expansion coil, and the electronic flow valve is connected with the controller through the electronic expansion coil. The controller can control the rotation of the rotor part in the electronic flow valve by sending a pulse signal to the electronic expansion coil, so as to adjust the opening degree of the electronic flow valve.
Optionally, the electronic flow valve is an electronic expansion valve. The electronic expansion valve has a relatively high response speed, and only takes a few seconds from a closed state to a fully opened state. In addition, the electronic expansion valve is suitable for low-temperature environments, and when the environment temperature is low, the medium in the electronic expansion valve cannot be affected by the temperature, so that the flow of the refrigerant can be well regulated.
Optionally, the first temperature sensor and the second temperature sensor are thermistor sensors. The thermistor sensor has the advantages of higher measurement accuracy and convenience in use in automatic measurement.
Optionally, the controller includes a temperature detector, and the first temperature sensor and the second temperature sensor are respectively connected with the temperature detector. The controller can acquire temperature information of the first temperature sensor and the second temperature sensor through the temperature detector, and control the opening of the electronic flow valve according to the acquired temperature information.
Optionally, a dry filter is further included, the dry filter being disposed between the condenser and the electronic flow valve. The drying filter is arranged between the condenser and the electronic flow valve, so that on one hand, the drying filter can adsorb redundant moisture in a pipeline, ice blockage faults are prevented, and corrosion of the moisture to a refrigeration pipeline is reduced; on the other hand, the dry filter can filter impurities in the refrigerating pipeline, such as dust, metal scraps and various oxides, so as to prevent the impurities from entering the compressor to cause faults.
Optionally, the filter further comprises a condensation preventing pipe, and the condensation preventing pipe is arranged between the dry filter and the condenser. The anti-condensation pipe is arranged between the drying filter and the condenser, and the high-temperature and high-pressure refrigerant flowing out of the condenser flows to the anti-condensation pipe, so that condensation is prevented from being generated around the door body of the refrigerator to a certain extent.
Optionally, the air-liquid separator is further included, and the air-liquid separator is arranged between the compressor and the evaporator. The gas-liquid separator can separate the gas and the liquid of the refrigerant wet steam flowing out of the evaporator, the liquid does not directly enter the air return pipe of the compressor, the separated liquid refrigerant slowly flows into the air return pipe of the compressor through small hole throttling, and then flows into the compressor, so that the phenomenon of liquid impact caused by that a large amount of wet steam returns to the compressor in a refrigerating system is reduced.
In a second aspect, the present application also provides a refrigerator, comprising: the refrigerating system with adjustable refrigerant flow rate according to the first aspect comprises a refrigerating chamber, a freezing chamber, a damper and an evaporator of the refrigerating system, wherein the evaporator of the refrigerating system is installed in the freezing chamber, and the freezing chamber exchanges cold air with the refrigerating chamber through the damper.
According to the technical scheme, the application provides a refrigerating system capable of adjusting flow of refrigerant and a refrigerator, wherein the refrigerating system comprises: the device comprises a compressor, a condenser, a capillary tube, an evaporator, an electronic flow valve, a first temperature sensor, a second temperature sensor and a controller; the compressor is provided with an exhaust pipe and an air return pipe, the exhaust pipe is connected with the inlet of the condenser, and the outlet of the condenser is connected with the inlet of the electronic flow valve; the outlet of the electronic flow valve is connected with the inlet of the capillary tube, and the outlet of the capillary tube is connected with the inlet of the evaporator; the outlet of the evaporator is connected with the air return pipe; the first temperature sensor is arranged at the inlet of the evaporator, the second temperature sensor is arranged at the outlet of the evaporator, and the first temperature sensor and the second temperature sensor are respectively connected with the controller; the controller is connected with the electronic flow valve. The refrigerating system detects the inlet and outlet temperatures of the evaporator through the controller and controls the electronic flow valve so as to solve the problems of low working efficiency and higher energy consumption of the refrigerator refrigerating system in the operation process.
Drawings
For a clearer description of the technical solutions of the present application, the drawings that are required to be used in the embodiments will be briefly described, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without the inventive effort.
Fig. 1 is a schematic view of a refrigerating system of a refrigerator;
fig. 2 is a schematic structural diagram of a refrigeration system according to an embodiment of the present application.
Reference numerals:
1-a compressor; a 2-condenser; 3-capillary; 4-an evaporator; 5-electronic flow valve; 61-a first temperature sensor; 62-a second temperature sensor; 7-a controller;
Detailed Description
In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.
As shown in fig. 1, a schematic structure of a refrigeration system of a refrigerator is shown. Refrigeration in a refrigerator is an energy conversion process in which a compressor sucks low-temperature, low-pressure refrigerant vapor in a refrigerating chamber evaporator to compress, the refrigerant becomes liquid, and after liquefaction, a large amount of heat is released, and the heat is dissipated into the air through a condenser. After the liquefied refrigerant dissipates heat, the temperature is reduced, the water and dust in the refrigerant are absorbed through a drying filter, the refrigerant enters a freezing chamber evaporator and a refrigerating chamber evaporator through capillary vessels, the refrigerant evaporates and absorbs a large amount of heat in the evaporator, the temperature around the evaporator is rapidly reduced, and then the refrigerant enters a compressor, so that the refrigeration of the refrigerator is realized.
However, the capillary tube adopts fixed flow when in design, cannot be matched with the refrigerating operation state of the refrigerator, and cannot timely adjust the flow of the refrigerant flowing into the evaporator from the capillary tube along with the change of the working state of the refrigerator, so that the refrigerator adopting the capillary tube cannot keep the high-efficiency operation of the refrigerating system in the operation process of the refrigerating system, and the energy consumption of the refrigerator is increased.
In order to solve the problem that the refrigerating system cannot be kept to operate at high efficiency in the operation process of the refrigerating system in the refrigerator, and the refrigerator is high in energy consumption, some embodiments of the application provide a refrigerating system capable of adjusting the flow of a refrigerant. Referring to fig. 2, a schematic structural diagram of a refrigeration system according to an embodiment of the present application is provided.
The refrigeration system includes: a compressor 1, a condenser 2, a capillary tube 3, an evaporator 4, an electronic flow valve 5, a first temperature sensor 61, a second temperature sensor 62, and a controller 7.
The compressor 1 is provided with an exhaust pipe and an air return pipe, the exhaust pipe is connected with an inlet of the condenser 2, and an outlet of the condenser 2 is connected with an inlet of the electronic flow valve 5; the outlet of the electronic flow valve 5 is connected with the inlet of the capillary tube 3, and the outlet of the capillary tube 3 is connected with the inlet of the evaporator 4; the outlet of the evaporator 4 is connected with an air return pipe; the first temperature sensor 61 is arranged at the inlet of the evaporator 4, the second temperature sensor 62 is arranged at the outlet of the evaporator 4, and the first temperature sensor 61 and the second temperature sensor 62 are respectively connected with the controller 7; the controller 7 is connected to the electronic flow valve 5.
The temperatures of the inlet and outlet of the evaporator 4 are detected by the first temperature sensor 61 and the second temperature sensor 62, and the controller 7 controls the opening degree of the electronic flow valve 5 according to the inlet and outlet temperatures of the evaporator 4 to improve the operation efficiency of the refrigeration system.
In some embodiments, the electronic flow valve 5 further comprises an electronic expansion coil, through which the electronic flow valve 5 is connected to the controller 7. The controller 7 may control the rotation of the rotor portion within the electronic flow valve 5 by sending a pulse signal to the electronic expansion coil, thereby adjusting the opening degree of the electronic flow valve 5. The opening degree of the electronic flow valve 5 is 0% -100%, wherein the opening degree of 0% corresponds to the closed state, the opening degree of 100% corresponds to the fully opened state, and the initial opening degree of the electronic flow valve 5 is set to be 40% -60%.
In some embodiments, the electronic flow valve 5 is an electronic expansion valve, which is a throttling element that can be programmed to throttle the flow of refrigerant into the refrigeration system. The electronic expansion valve generates a magnetic field by the coil through current and acts on a valve needle in the electronic expansion valve to drive the valve needle to rotate, and when the positive and negative power supply voltages and signals of the coil are changed, the electronic expansion valve is opened and closed or the opening and closing gap is changed, so that the flow rate and the refrigerating capacity of the refrigerating system are achieved. The smaller the valve core is opened, the smaller the refrigerant flow rate and the smaller the refrigerating capacity.
The electronic expansion valve responds faster, taking only a few seconds from the closed state to the fully open state. In addition, the electronic expansion valve is suitable for low-temperature environment, and when the environment temperature is low, the medium in the electronic expansion valve cannot be affected by the temperature, so that the flow of the refrigerant can be well regulated.
In some embodiments, the first temperature sensor 61 and the second temperature sensor 62 are thermistor sensors. Thermistor sensors are manufactured using the principle that the resistivity of a conductor or semiconductor changes with temperature. The thermosensitive electronic sensor has higher measurement precision, and can more accurately detect the inlet temperature and the outlet temperature of the evaporator 4. Secondly, the thermosensitive electronic sensor is easy to use in automatic measurement, the controller 7 can accurately detect the inlet temperature and the outlet temperature of the evaporator 4 through the first temperature sensor 61 and the second temperature sensor 62, and further control the opening of the electronic flow valve 5, so as to control the refrigerating system and improve the refrigerating efficiency
In some embodiments, the controller 7 includes a temperature detector to which the first temperature sensor 61 and the second temperature sensor 62 are connected, respectively. Wherein, the controller 7 can obtain the sizes of the first temperature sensor 61 and the second temperature sensor 62 through the temperature detector, and control the opening of the electronic flow valve 5 according to the obtained temperature information.
For example, after the refrigerator compressor 1 is operated, the controller 7 controls the electronic flow valve 5 such that the electronic flow valve 5 is operated for a certain time, and after that, the controller 7 controls the first temperature sensor 61 and the second temperature sensor 62. Detecting an inlet temperature and an outlet temperature of the evaporator 4, and if a difference between the outlet temperature and the inlet temperature of the evaporator 4 is greater than a set temperature difference, the controller 7 controls the electronic flow valve 5, increases an opening of the electronic flow valve 5,
in some embodiments, the refrigeration system further comprises a dry filter disposed between the condenser 2 and the electronic flow valve 5.
The high-temperature and high-pressure superheated steam is discharged from the exhaust port of the compressor 1, cooled by the condenser 2 and enters the capillary tube 3 for throttling and depressurization. Since the inner diameter of the capillary tube 3 is small, clogging is easily caused if moisture and impurities exist in the system, so that the refrigerant cannot circulate. If these impurities once enter the compressor 1, wear of parts such as pistons, cylinders, bearings and the like may be increased, and performance and service life of the compressor 1 may be affected. Therefore, a dry filter is required to be arranged between the condenser 2 and the capillary tube 3, on one hand, the dry filter can adsorb redundant moisture in a pipeline, reduce the probability of ice blockage faults, and reduce the corrosion of the moisture to a refrigeration pipeline; on the other hand, the drier-filter can filter impurities such as dust, metal chips and various oxides in the refrigerating line to prevent the impurities from entering the compressor 1 to cause malfunction.
In some embodiments, the refrigeration system further comprises a condensation preventing tube disposed between the dry filter and the condenser 2. Thus, the high-temperature and high-pressure refrigerant flowing out of the condenser 2 flows into the condensation preventing pipe, thereby preventing condensation from occurring around the door of the refrigerator to some extent.
In some embodiments, the refrigeration system further comprises a gas-liquid separator disposed between the compressor 1 and the evaporator 4. The gas-liquid separator mainly utilizes the inertia of gas and liquid to realize gas-liquid separation, the gas inertia is smaller, the gas can enter the muffler of the compressor 1 from the outlet of the evaporator 4 in a turning way, the liquid inertia is larger, and then enters the gas-liquid separator from the outlet of the evaporator 4, so that the gas and the liquid of the wet steam of the refrigerant flowing out of the evaporator 4 are separated, the liquid does not directly enter the muffler of the compressor 1, the separated liquid refrigerant slowly flows into the muffler of the compressor 1 through orifice throttling, enters the compressor 1, and the phenomenon of 'liquid impact' caused by a large amount of wet steam of the refrigerating system returning to the compressor 1 is reduced.
Based on the adjustable refrigerant flow refrigerating system provided in the above embodiments, some embodiments of the present application further provide a refrigerator, including: the refrigerating system with adjustable refrigerant flow provided by the embodiment comprises a refrigerating chamber, a freezing chamber, a damper and an evaporator 4 of the refrigerating system, wherein the evaporator 4 of the refrigerating system is arranged in the freezing chamber, and the freezing chamber exchanges cold air with the refrigerating chamber through the damper.
According to the above technical scheme, the application provides a refrigerating system and refrigerator with adjustable refrigerant flow, the refrigerating system includes: a compressor 1, a condenser 2, a capillary tube 3, an evaporator 4, an electronic flow valve 5, a first temperature sensor 61, a second temperature sensor 62, and a controller 7; the compressor 1 is provided with an exhaust pipe and an air return pipe, the exhaust pipe is connected with the inlet of the condenser 2, and the outlet of the condenser 2 is connected with the inlet of the electronic flow valve 5; the outlet of the electronic flow valve 5 is connected with the inlet of the capillary tube 3, and the outlet of the capillary tube 3 is connected with the inlet of the evaporator 4; the outlet of the evaporator 4 is connected with an air return pipe; the first temperature sensor 61 is arranged at the inlet of the evaporator 4, the second temperature sensor 62 is arranged at the outlet of the evaporator 4, and the first temperature sensor 61 and the second temperature sensor 62 are respectively connected with the controller 7; the controller 7 is connected to the electronic flow valve 5. The temperature of the inlet and the outlet of the evaporator 4 is detected by the controller 7, and the electronic flow valve 5 is controlled, so that the problems of low working efficiency and higher energy consumption of the refrigerator refrigerating system in the running process are solved.
The foregoing detailed description of the embodiments is merely illustrative of the general principles of the present application and should not be taken in any way as limiting the scope of the utility model. Any other embodiments developed in accordance with the present application without inventive effort are within the scope of the present application for those skilled in the art.
Claims (9)
1. A refrigerant system with adjustable refrigerant flow, comprising: a compressor (1), a condenser (2), a capillary tube (3), an evaporator (4), an electronic flow valve (5), a first temperature sensor (61), a second temperature sensor (62) and a controller (7);
the compressor (1) is provided with an exhaust pipe and an air return pipe, the exhaust pipe is connected with the inlet of the condenser (2), and the outlet of the condenser (2) is connected with the inlet of the electronic flow valve (5); the outlet of the electronic flow valve (5) is connected with the inlet of the capillary tube (3), and the outlet of the capillary tube (3) is connected with the inlet of the evaporator (4); the outlet of the evaporator (4) is connected with the air return pipe;
the first temperature sensor (61) is arranged at the inlet of the evaporator (4), the second temperature sensor (62) is arranged at the outlet of the evaporator (4), and the first temperature sensor (61) and the second temperature sensor (62) are respectively connected with the controller (7); the controller (7) is connected with the electronic flow valve (5).
2. A refrigeration system according to claim 1, wherein the electronic flow valve (5) further comprises an electronic expansion coil, through which the electronic flow valve (5) is connected to the controller (7).
3. A refrigeration system according to claim 1, characterized in that the electronic flow valve (5) is an electronic expansion valve.
4. The refrigeration system of claim 1, wherein the first temperature sensor (61) and the second temperature sensor (62) are thermistor sensors.
5. A refrigeration system according to claim 1, characterized in that the controller (7) comprises a temperature detector, to which the first temperature sensor (61) and the second temperature sensor (62) are connected, respectively.
6. A refrigeration system according to claim 1, further comprising a drier-filter arranged between the condenser (2) and the electronic flow valve (5).
7. A refrigeration system according to claim 6, further comprising an anti-condensation tube arranged between the drier filter and the condenser (2).
8. A refrigeration system according to claim 1, further comprising a gas-liquid separator arranged between the compressor (1) and the evaporator (4).
9. A refrigerator, characterized by comprising a refrigerating chamber, a freezing chamber, a damper and the adjustable refrigerant flow refrigerating system of any one of claims 1 to 8, an evaporator (4) of the refrigerating system being installed in the freezing chamber, the freezing chamber being cold-exchanged with the refrigerating chamber through the damper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320250935.XU CN219473996U (en) | 2023-02-08 | 2023-02-08 | Refrigerating system capable of adjusting flow of refrigerant and refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320250935.XU CN219473996U (en) | 2023-02-08 | 2023-02-08 | Refrigerating system capable of adjusting flow of refrigerant and refrigerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219473996U true CN219473996U (en) | 2023-08-04 |
Family
ID=87437662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320250935.XU Active CN219473996U (en) | 2023-02-08 | 2023-02-08 | Refrigerating system capable of adjusting flow of refrigerant and refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219473996U (en) |
-
2023
- 2023-02-08 CN CN202320250935.XU patent/CN219473996U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109682106B (en) | Refrigerant circulation system for slowing down surge of compressor, control method thereof and air conditioner | |
| CN112594824B (en) | Non-stop defrosting multi-online hot water system and control method thereof | |
| US4932221A (en) | Air-cooled cooling apparatus | |
| CZ301186B6 (en) | Vapor compression system and operating mode thereof | |
| CN112856858A (en) | Compressor oil return system, oil return control method and air conditioning system with same | |
| CN210801680U (en) | Cold and warm dual-purpose air source heat pump system | |
| CN112325494A (en) | Refrigerant circulation system and control method thereof | |
| WO2019159826A1 (en) | Refrigerator | |
| CN219473996U (en) | Refrigerating system capable of adjusting flow of refrigerant and refrigerator | |
| US4869074A (en) | Regenerative refrigeration cycle apparatus and control method therefor | |
| CN103673440A (en) | Refrigerated dryer with electronic bypass type energy adjusting function | |
| CN207674639U (en) | A kind of air conditioner heat pump system of temperature control throttling | |
| CN210512224U (en) | Refrigerant circulation system | |
| JP2002364937A (en) | Refrigerator | |
| CN113847748A (en) | Multi-split system, control method thereof and storage medium | |
| JPH04288453A (en) | Freezing cycle device | |
| CN210980414U (en) | Energy-saving refrigerating system of high-low temperature alternating damp-heat test box | |
| JPH06193975A (en) | Refrigerating cycle | |
| CN218764046U (en) | Refrigerating system and refrigerating unit | |
| JP2004061056A (en) | Oil level detecting method and device for compressor | |
| JPS5888559A (en) | Cooling device | |
| CN202747710U (en) | Refrigerated dryer with electronic by-pass energy regulation function | |
| KR0161949B1 (en) | Refrigeration cycle apparatus of refrigerator having two evaporators | |
| JP2004205142A (en) | Refrigerating and air conditioning apparatus and its operation control method | |
| JP2936881B2 (en) | Refrigeration equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |