CN113895210A - Compressor protection method, protection device and refrigeration equipment - Google Patents
Compressor protection method, protection device and refrigeration equipment Download PDFInfo
- Publication number
- CN113895210A CN113895210A CN202111137779.8A CN202111137779A CN113895210A CN 113895210 A CN113895210 A CN 113895210A CN 202111137779 A CN202111137779 A CN 202111137779A CN 113895210 A CN113895210 A CN 113895210A
- Authority
- CN
- China
- Prior art keywords
- compressor
- tilting
- preset
- protection
- inclination angle
- 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.)
- Granted
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/32—Cooling devices
- B60H1/3204—Cooling devices using compression
- B60H1/3225—Cooling devices using compression characterised by safety arrangements, e.g. compressor anti-seizure means or by signalling devices
Abstract
The invention discloses a compressor protection method, a protection device and refrigeration equipment, wherein the compressor protection method comprises the following steps: detecting the inclination angle of the compressor and accumulating the times T that the inclination angle exceeds the preset limit valueTilting(ii) a Number of times of willTiltingComparing with the preset times; if the number of times TTiltingIf the number of times is more than the preset number of times, starting the compressor to stop the protection, and if the number of times is TTiltingAnd if the number of times is less than or equal to the preset number, the compressor does not start the shutdown protection. Every time a preset time T passes is a period, and the number of times T when each period starts isTiltingAnd (6) clearing. The invention accumulates the times T that the inclination angle exceeds the preset limit valueTiltingWhether the compressor is in a shaking state for a long time is reflected, whether the compressor is started to stop the machine for protection is selected according to a comparison result, damage caused by frequent starting and stopping of the compressor can be avoided, and energy consumption can be reduced.
Description
Technical Field
The invention relates to the technical field of refrigeration equipment, in particular to a compressor protection method, a protection device and refrigeration equipment.
Background
The compressor is used as a power source for refrigeration of the heart of the refrigeration system, and the compressor is required to be incapable of inclining and energized only by standing after being carried, so that the problem that the compressor is easy to damage or oil blockage of the refrigeration system is caused by operation of the compressor when engine oil of the compressor shakes is solved. In addition, if the automobile runs on a rugged road or brakes suddenly, the engine oil of the compressor can shake violently due to inertia of vehicle-mounted refrigeration equipment such as a refrigerator, an air conditioner and the like, and at the moment, if the compressor still continues to run, the refrigeration effect can be influenced, and even the cylinder collision damage can be caused.
The scheme that can protect the compressor through detecting the inclination angle of the compressor has appeared among the prior art, and the inclination angle is compared with a preset value to judge whether the inclination angle of the compressor is too large, and then whether the compressor is started is determined, so that the compressor of the vehicle air conditioner is effectively protected. However, when the vehicle is driven on a rough road, the compressor may be frequently started and stopped, not only reducing the life of the compressor but also increasing energy consumption.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a compressor protection method, a protection device and refrigeration equipmentTiltingWhether the compressor is in a shaking state for a long time is reflected, whether the compressor is started to stop the machine for protection is selected according to a comparison result, damage caused by frequent starting and stopping of the compressor can be avoided, and energy consumption can be reduced.
The technical scheme adopted by the invention is that a compressor protection method is designed, and comprises the following steps:
detecting the inclination angle of the compressor and accumulating the times T that the inclination angle exceeds the preset limit valueTilting；
Number of times of willTiltingComparing with the preset times;
and selecting whether the compressor starts shutdown protection or not according to the comparison result.
Further, selecting whether the compressor starts shutdown protection according to the comparison result comprises:
when number of times TTiltingIf the number of times is more than the preset number, starting the compressor to stop for protection;
when number of times TTiltingWhen the number of times is less than or equal to the preset number, the compressor does not start the shutdown protection.
Furthermore, each preset time T is a period, and the time T is the beginning of each periodTiltingAnd (6) clearing.
Furthermore, when the inclination angle exceeds a preset limit value, the compressor is started to be in power-off protection, and the compressor is delayed to be electrified again.
In some embodiments, the inclination angle of the compressor is detected and the number T of times the inclination angle exceeds a preset limit value is accumulatedTiltingThe method comprises the following steps:
detecting inclination angles of at least two different directions of the compressor;
accumulating the times T 'that the inclination angle in the single direction exceeds the preset limit value'Tilting；
The times T 'of all directions'TiltingAdd to obtain the number of times TTiltingNumber of times T 'of all directions at the beginning of each period'TiltingAnd (6) clearing.
The invention also proposes a compressor protection device comprising:
at least one detecting device for detecting the inclination angle of the compressor;
a counting module for accumulating the times T of the inclination angle exceeding the preset limit valueTilting；
A control module for counting the number of times TTiltingAnd comparing with the preset times, and selecting whether the compressor starts shutdown protection or not according to the comparison result.
Further, the control module is used for the time TTiltingWhen the number of times is larger than the preset number of times, the compressor is controlled to start and stop to protect, and the control module controls the compressor to start and stop to protect when the number of times is TTiltingAnd controlling the compressor not to start shutdown protection when the number of times is less than or equal to the preset number.
Further, the compressor protection device further includes: the counting module is cleared when each period begins, and the timer is cleared when each period ends.
In some embodiments, the compressor protection device has at least two detection devices for detecting inclination angles of the compressor in different directions, and the counting module includes: counters corresponding to the detection devices one by one, and each counter accumulates the times T 'that the inclination angle of the corresponding detection device exceeds a preset limit value'TiltingCounting module counts the times T 'of all counters'TiltingAdd to obtain the number of times TTilting。
Furthermore, the detection devices are connected with the compressor in parallel and then are connected with a power supply through the overload protector, any detection device is connected with a branch where the detection device is located when detecting that the inclination angle exceeds a preset limit value so as to trigger the overload protector to be disconnected, and the overload protector is connected in a delayed manner after being disconnected.
In some embodiments, the detection device adopts a U-shaped horizontal liquid level instrument, and the end part of the U-shaped horizontal liquid level instrument is provided with a ventilation micropore.
The invention also proposes a refrigeration device comprising: the compressor protection method comprises a compressor and a control module, wherein the control module executes the compressor protection method.
The invention also provides refrigeration equipment adopting the compressor protection device, and the refrigeration equipment is a vehicle-mounted refrigerator or a vehicle-mounted air conditioner.
In some embodiments, two adjacent sides of the refrigeration equipment are provided with the detection device.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the number T of times that the inclination angle exceeds the preset limit valueTiltingIntelligently evaluating whether the compressor is in a shaking state for a long time or not, if the time T isTiltingIf the frequency is more than the preset frequency, the compressor is in a shaking state for a long time, and the compressor is started and stopped for protection, so that the compressor is prevented from being damaged by frequent starting and stopping; if the number of times TTiltingIf the frequency is less than or equal to the preset frequency, the compressor shakes accidentally, the compressor does not start shutdown protection, the compressor can be started to operate according to refrigeration needs, and the situation that the temperature of a refrigerator compartment or an indoor environment is not too high due to the delay of refrigeration time is ensured under the condition that the compressor is protected; if the compressor has started the shutdown protection, the number of times T of the next period is determinedTiltingIf not, the compressor is in a shaking state for a long time, and the compressor maintains the shutdown protection;
2. when the inclination angle of the compressor exceeds a preset limit value, the compressor is started to be protected from power failure, and the compressor is prevented from being damaged;
3. the inclination angles of the compressor in at least two different directions are detected so as to accurately reflect the inclination condition of the compressor and improve the detection sensitivity and accuracy.
Drawings
The invention is described in detail below with reference to examples and figures, in which:
FIG. 1 is a schematic flow diagram of a compressor protection method of the present invention;
FIG. 2 is a schematic circuit diagram of the compressor protection arrangement of the present invention;
FIG. 3 is a schematic partial cross-sectional view of a U-shaped level gauge according to the present invention;
FIG. 4 is a schematic side view of a U-shaped level gauge according to the present invention;
fig. 5 is a schematic view showing the installation of the U-shaped horizontal level gauge of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The principles of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.
As shown in fig. 1, the compressor protection method provided by the present invention is suitable for a refrigeration device, especially a vehicle-mounted refrigeration device, such as a vehicle-mounted refrigerator or a vehicle-mounted air conditioner. The refrigeration apparatus includes: the compressor protection method comprises a compressor and a control module, wherein the control module executes the compressor protection method, and the protection method comprises the following steps.
In order to improve the judgment accuracy, the compressor protection method of the invention periodically detects the inclination angle of the compressor, each preset time T is a period, and the time T is the number of times when each period startsTiltingZero clearing, and counting the times T at the end of each periodTiltingAnd comparing with the preset times. By judging the number of times T in unit time-preset time TTiltingAnd judging whether the compressor frequently shakes within the time. If the number of times T of the current periodTiltingThe number of times is less than or equal to the preset number, the compressor is occasionally shaken, the shutdown protection is not started, and the refrigeration requirement is met. If the number of times T of the current periodTiltingIf the number of times is more than the preset number, the compressor is in a bumpy and sloshing state continuously, and the compressor starts to stop for protection; judging the number T of the next period after the compressor starts the shutdown protectionTiltingAnd if not, the compressor is still in a shaking state for a long time, and the compressor maintains the shutdown protection. In order to better protect the compressor, when the inclination angle exceeds a preset limit value, the compressor is enabled to start power-off protection, and the preset delay time is delayed to enable the compressor to be electrified again.
In a preferred embodiment, the inclination angle of the compressor is detected and the number of times T that the inclination angle exceeds a preset limit value is accumulatedTiltingThe method comprises the following steps:
detecting the inclination angles of the compressor in at least two different directions so as to accurately reflect the inclination condition of the compressor and improve the detection sensitivity and accuracy;
accumulating the times T 'that the inclination angle in the single direction exceeds the preset limit value'Tilting；
The times T 'of all directions'TiltingAdd to obtain the number of times TTiltingNumber of times T 'of all directions at the beginning of each period'TiltingAnd (6) clearing.
It should be noted that the preset limit value, the preset number of times, the preset time t, and the preset delay time are all designed according to actual needs, and in an embodiment of the present invention, the inclination angles of the compressor in two different directions are detected, the preset number of times is 5 times, the preset time t is 5 minutes, and the preset delay time is 30 seconds.
The invention also proposes a compressor protection device comprising: the device comprises a control module, a counting module and at least one detection device, wherein the detection device detects the inclination angle of the compressor, when the detection device is more than two, each detection device is used for detecting the inclination angle of the compressor in different directions, and the counting module accumulates the times T that the inclination angle exceeds a preset limit valueTiltingThe control module compares the times TTiltingComparing with the preset times at the time TTiltingWhen the number of times is more than the preset number of times, the compressor is controlled to start and stop to protect so as to avoid frequent start and stop of the compressor, and the number T of timesTiltingAnd when the frequency is less than or equal to the preset frequency, controlling the compressor not to start shutdown protection so as to ensure the refrigeration effect of the refrigeration equipment.
In order to improve the judgment accuracy, the compressor protection device further comprises: the counting module is cleared when each period begins, and the timer is cleared when each period ends. By judging the times T in the preset time TTiltingAnd judging whether the compressor frequently shakes within the time, if so, indicating that the compressor is continuously in a jolting and shaking state and needs shutdown protection, otherwise, indicating that the compressor accidentally shakes and does not start the shutdown protection, and timely meeting the refrigeration requirement.
In a preferred embodiment of the present invention, as shown in fig. 2, the compressor protection device has a first detection device 5 and a second detection device 6 for detecting the inclination angles of the compressor in different directions, and the counting module comprises: a first counter 3 corresponding to the first detecting device 5, and a second counter 4 corresponding to the second detecting device 6, each of which counts the number of times T 'that the inclination angle of the corresponding detecting device exceeds a preset limit value'TiltingCounting module counts the times T 'of all counters'TiltingAdd to obtain the number of times TTiltingNumber of times T 'of all counters at the beginning of each cycle'TiltingAre all cleared.
In order to protect the compressor better, the detection device is connected with the compressor 7 in parallel and then connected with the overload protector 2 in series to be connected with the power supply 1, namely, different detection devices are in parallel connection, the detection device is also in parallel connection with the compressor 7, the detection device and the compressor 7 are connected in series on the overload protector 2, any detection device is connected with a branch where the detection device is located when detecting that the inclination angle exceeds a preset limit value, the branch is in a short circuit state, the current passing through the overload protector 2 is overlarge, the overload protector 2 is further triggered to be disconnected, the compressor 7 is enabled to enter a power-off protection state, the overload protector 2 is reset after delaying a preset delay time, and the compressor 7 is powered on again.
As shown in fig. 3 and 4, in some embodiments, the detection device is a U-shaped level gauge 8, and the U-shaped level gauge 8 includes: u type pipe 84, rubber buffer 82, positive terminal 81, negative terminal 85 and electrolyte 86 that can conduct, the opening of U type pipe 84 sets up upwards, and the top of the upright part of opening both sides is equipped with positive terminal 81, and rubber buffer 82 is used for sealing the junction between positive terminal 81 and the upright part, prevents that electrolyte 86 from leaking. The bent portion at the bottom of the opening is provided with a negative terminal 85, and the inside of the U-shaped tube 84 is hollow to contain an electrolyte 86. When the U-shaped horizontal liquid level meter 8 is in a stable state, the positive electrode and the negative electrode are not connected, the branch where the U-shaped horizontal liquid level meter 8 is located is in an off state, when the U-shaped horizontal liquid level meter 8 is in an unstable state, the electrolyte 86 can shake due to inertia to connect the positive electrode and the negative electrode, and the branch where the U-shaped horizontal liquid level meter 8 is located is in an on state. Meanwhile, the vertical part is also provided with a ventilation micropore 83, so that the pressure difference on two sides can be balanced, and on the other hand, the electrolyte 86 can be injected into or pumped out of the U-shaped pipe 84 through the ventilation micropore 83 to adjust and check the sensitivity of the U-shaped pipe. The pore diameter of the gas-permeable micro-pores 83 is less than 1 mm to prevent the electrolyte 86 from leaking out of the gas-permeable micro-pores 83.
The invention also provides refrigeration equipment adopting the compressor protection device, and the refrigeration equipment is a vehicle-mounted refrigerator or a vehicle-mounted air conditioner. As shown in fig. 5, in some embodiments, two adjacent side surfaces of the refrigeration equipment are respectively provided with the first detection device 5 and the second detection device 6, that is, two adjacent side surfaces of four side surfaces of the refrigeration equipment are respectively provided with one detection device, which respectively reflects unstable or unbalanced conditions of the front and back direction and the left and right direction of the compressor, so as to avoid insufficient detection sensitivity in a single direction and poor protection effect. When the detection device adopts the U-shaped horizontal liquid level instrument, the detection device is fixed with the box body 9 of the refrigeration equipment through the fixing buckle 10, fine adjustment can be carried out before fixation, and the U-shaped horizontal liquid level instrument 8 is checked.
It should be understood that the detecting device of the present invention is used for detecting the inclination angle of the compressor, and the installation position thereof is not particularly limited, and the detecting device may be installed on the refrigeration equipment, or may be installed on another component moving synchronously with the compressor, as long as the inclination state of the compressor can be reflected.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (16)
1. A method of protecting a compressor, comprising:
detecting the inclination angle of the compressor and accumulating the number T of times that the inclination angle exceeds a preset limit valueTilting；
The number of times TTiltingComparing with the preset times;
and selecting whether the compressor starts shutdown protection or not according to the comparison result.
2. The compressor protection method of claim 1, wherein selecting whether to initiate shutdown protection for the compressor based on the comparison comprises:
when the number of times T isTiltingIf the preset times are more than the preset times, starting shutdown protection of the compressor;
when the number of times T isTiltingAnd when the preset times are less than or equal to the preset times, the compressor does not start shutdown protection.
3. Method for protecting a compressor as claimed in claim 1, characterized in that the inclination angle of the compressor is detected and the number of times T that said inclination angle exceeds a preset limit value is accumulatedTiltingThe method comprises the following steps:
detecting inclination angles of the compressor in at least two different directions;
accumulating the times T 'that the inclination angle in the single direction exceeds the preset limit value'Tilting；
The times T 'of all directions'TiltingAdding to obtain the number of times TTilting。
4. A method for protecting a compressor as claimed in any one of claims 1 to 3, wherein each predetermined time T elapsed is a period, and the number of times T is said at the beginning of each periodTiltingAnd (6) clearing.
5. The method according to claim 1, wherein when the inclination angle exceeds a preset limit value, the compressor is enabled to start power-off protection, and power supply of the compressor is resumed in a delayed manner.
6. Compressor protection device, characterized by, includes:
at least one detecting device for detecting the inclination angle of the compressor;
a counting module for accumulating the times T of the inclination angle exceeding the preset limit valueTilting；
A control module for counting the number of times TTiltingAnd comparing with the preset times, and selecting whether the compressor starts shutdown protection or not according to the comparison result.
7. The compressor protection device of claim 6, wherein the control module is configured to determine the number T of timesTiltingWhen the frequency is greater than the preset frequency, the compressor is controlled to start and stop protection, and the control module controls the frequency T to beTiltingAnd when the number of times is less than or equal to the preset number, controlling the compressor not to start shutdown protection.
8. The compressor protection device of claim 6, wherein the compressor protection device has at least two detection devices for detecting inclination angles of the compressor in different directions, and the counting module comprises: counters corresponding to the detection devices one by one, and each counter accumulates the times T 'that the inclination angle of the corresponding detection device exceeds a preset limit value'TiltingThe counting module counts the times T 'of all the counters'TiltingAdding to obtain the number of times TTilting。
9. The compressor protection device of any one of claims 6 to 8, further comprising: the counting module is cleared when each period starts, and the timer is cleared when each period ends.
10. A compressor protection device according to any one of claims 6 to 8, wherein the detection means is connected in parallel with the compressor and then to a power supply via an overload protector, any one of the detection means switching on its branch when detecting that the angle of inclination exceeds a predetermined limit value to trigger the overload protector to switch off, the overload protector switching on with a delay after switching off.
11. A compressor protection device according to any one of claims 6 to 8, wherein the detection means employs a U-shaped level gauge.
12. The compressor protection device of claim 11, wherein the opening of the U-shaped horizontal level gauge is arranged upward, and the end of the U-shaped horizontal level gauge is provided with a ventilation micropore.
13. A refrigeration appliance comprising: compressor and control module, characterized in that said control module performs the compressor protection method according to any one of claims 1 to 5.
14. Refrigeration appliance, characterized in that it employs a compressor protection device according to any one of claims 6 to 12.
15. A cold appliance according to claim 14, wherein the detection means are provided on both sides of the cold appliance which are located adjacent to each other.
16. The refrigeration appliance according to claim 14, wherein the refrigeration appliance is an on-board refrigerator or an on-board air conditioner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111137779.8A CN113895210B (en) | 2021-09-27 | 2021-09-27 | Compressor protection method, protection device and refrigeration equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111137779.8A CN113895210B (en) | 2021-09-27 | 2021-09-27 | Compressor protection method, protection device and refrigeration equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113895210A true CN113895210A (en) | 2022-01-07 |
| CN113895210B CN113895210B (en) | 2023-07-25 |
Family
ID=79029749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111137779.8A Active CN113895210B (en) | 2021-09-27 | 2021-09-27 | Compressor protection method, protection device and refrigeration equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113895210B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110978947A (en) * | 2019-11-29 | 2020-04-10 | 青岛海尔空调器有限总公司 | Control method for vehicle air conditioner, vehicle air conditioner and vehicle |
| CN111002783A (en) * | 2019-11-29 | 2020-04-14 | 青岛海尔空调器有限总公司 | Control method for vehicle air conditioner, vehicle air conditioner and vehicle |
| JP2020118073A (en) * | 2019-01-23 | 2020-08-06 | 株式会社マキタ | Air compressor |
| CN112937256A (en) * | 2021-03-19 | 2021-06-11 | 海信（山东）空调有限公司 | Compressor oil return control method and device, parking air conditioner and storage medium |
-
2021
- 2021-09-27 CN CN202111137779.8A patent/CN113895210B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020118073A (en) * | 2019-01-23 | 2020-08-06 | 株式会社マキタ | Air compressor |
| CN110978947A (en) * | 2019-11-29 | 2020-04-10 | 青岛海尔空调器有限总公司 | Control method for vehicle air conditioner, vehicle air conditioner and vehicle |
| CN111002783A (en) * | 2019-11-29 | 2020-04-14 | 青岛海尔空调器有限总公司 | Control method for vehicle air conditioner, vehicle air conditioner and vehicle |
| CN112937256A (en) * | 2021-03-19 | 2021-06-11 | 海信（山东）空调有限公司 | Compressor oil return control method and device, parking air conditioner and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113895210B (en) | 2023-07-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102410701B (en) | Compartment temperature control method of refrigerator | |
| CN104896711A (en) | Automatic cleaning system, air conditioner and control method | |
| CA2410872A1 (en) | Refrigerant monitoring apparatus and method | |
| US20060256497A1 (en) | Method of diagnosing main relay by use of electronic control unit and electronic control unit | |
| CN109210679B (en) | Control method and device of air conditioner, storage medium and air conditioner | |
| JP2008220043A (en) | Motor overcurrent supply protection system, refrigeration-cycle system, refrigeration-cycle system control method | |
| KR20160093053A (en) | Compressor system and method for operating the compressor system in dependence on the current situation of the rail vehicle | |
| CN108255215A (en) | A kind of electronic cooling anti-condensation system and its anti-condensation method | |
| CN110978947A (en) | Control method for vehicle air conditioner, vehicle air conditioner and vehicle | |
| JPH07218057A (en) | Monitoring method of refrigerant filling level in cooling facility | |
| EP4012250A1 (en) | Pneumatic control method and apparatus, and computer-readable storage medium and vehicle | |
| CN110758052B (en) | Drive control method and device, air conditioning equipment, vehicle and storage medium | |
| US6446505B1 (en) | Method for monitoring the refrigerant filling level in refrigerating system | |
| CN101761472B (en) | Method and device for detecting fault and efficiency of an air compressor | |
| CN113895210A (en) | Compressor protection method, protection device and refrigeration equipment | |
| KR101219378B1 (en) | Anti-fogging device for wind-shield glass of automobile and method thereof | |
| JP2010197294A (en) | Charge amount monitoring device | |
| US10023169B2 (en) | Sleep mode for an air dryer | |
| CN109028453B (en) | Air conditioner and air conditioner control method | |
| KR101428103B1 (en) | Apparatus for discharging leakage hydrogen of engine room for full cell bus | |
| JPH0222614Y2 (en) | ||
| KR101259323B1 (en) | Apparatus and method for control of wipers in car | |
| CN110671752B (en) | Water fullness control method and device of mobile air conditioner | |
| CN113587418A (en) | Rack type precise air conditioner for data center | |
| EP1186840B1 (en) | A method and a system for monitoring the state of filling of a motor-vehicle air-conditioning system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |