CN113895210B - Compressor protection method, protection device and refrigeration equipment - Google Patents
Compressor protection method, protection device and refrigeration equipment Download PDFInfo
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- CN113895210B CN113895210B CN202111137779.8A CN202111137779A CN113895210B CN 113895210 B CN113895210 B CN 113895210B CN 202111137779 A CN202111137779 A CN 202111137779A CN 113895210 B CN113895210 B CN 113895210B
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- compressor
- tilting
- preset
- protection
- inclination angle
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- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Positive-Displacement Pumps (AREA)
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 of exceeding the preset limit value Tilting The method comprises the steps of carrying out a first treatment on the surface of the Number of times T Tilting And preset timesComparing; if times T Tilting If the number of times is greater than the preset number of times, starting and stopping protection of the compressor, and if the number of times is T Tilting And if the number of times is less than or equal to the preset number of times, the compressor is not started to stop for protection. Every time a preset time T is passed, every period is started for a number of times T Tilting And (5) zero clearing. The invention adds up the times T of the inclination angle exceeding the preset limit value Tilting Whether the compressor is in a shaking state for a long time is reflected, whether the compressor is started to stop 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 heart of the compressor as a refrigerating system is a refrigerating power source, and the compressor is required to be inclined and kept still for power on after being carried, so that the purpose of avoiding the phenomenon that the compressor is easily damaged or blocked by the operation of the compressor when engine oil of the compressor shakes is achieved. In addition, if the automobile runs on a rugged road or brakes suddenly, the engine oil of the compressor can shake severely due to inertia of the vehicle-mounted refrigeration equipment such as a refrigerator, an air conditioner and the like, and at the moment, the compressor can influence the refrigeration effect and even cause cylinder collision damage if still running.
In the prior art, a scheme capable of protecting the compressor by detecting the inclination angle of the compressor has appeared, and comparing the inclination angle with a preset value to judge whether the inclination angle of the compressor is overlarge or not and then determine whether to start the compressor or not, so that the compressor of the vehicle air conditioner is effectively protected. However, when the vehicle is traveling on a rough road, the compressor may frequently start and stop, not only reducing the life of the compressor but also increasing the power consumption.
Disclosure of Invention
In order to solve the defects existing in the prior art, the invention provides a compressor protection method, a protection device and a refrigeration device, wherein the compressor protection method is implemented by accumulating the times T of the inclination angle exceeding a preset limit value Tilting Whether the compressor is in a shaking state for a long time is reflected, whether the compressor is started to stop 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 the method for protecting the compressor comprises the following steps:
detecting the inclination angle of the compressor and accumulating the times T of exceeding the preset limit value Tilting ；
Number of times T Tilting Comparing with preset times;
and selecting whether the compressor starts shutdown protection according to the comparison result.
Further, selecting whether the compressor starts the shutdown protection according to the comparison result includes:
when times T Tilting When the number of times is more than preset, starting and stopping the compressor for protection;
when times T Tilting And when the number of times is less than or equal to the preset number of times, the compressor is not started to stop for protection.
Further, each time a preset time T is passed, the number of times T of starting each cycle Tilting And (5) zero clearing.
Further, when the inclination angle exceeds a preset limit value, the compressor is started to be in power-off protection, and the power on of the compressor is recovered in a delayed mode.
In some embodiments, the inclination angle of the compressor is detected and the number of times T that the inclination angle exceeds a preset limit value is counted Tilting Comprising the following steps:
detecting inclination angles of at least two different directions of the compressor;
accumulating the times T 'that the inclination angle of the single direction exceeds a preset limit value' Tilting ；
The times T 'of all directions' Tilting The times T are obtained by adding Tilting Number of times T 'in all directions at the beginning of each cycle' Tilting And (5) zero clearing.
The invention also proposes a compressor protection device comprising:
at least one detecting device for detecting an inclination angle of the compressor;
a counting module for accumulating the times T of the inclination angle exceeding a preset limit value Tilting ；
A control module for counting the times T Tilting And comparing the comparison result with the preset times, and selecting whether the compressor starts shutdown protection or not according to the comparison result.
Further, the control module counts the time T Tilting When the number of times is greater than a preset number, the control module controls the compressor to start and stop for protection, and the control module controls the compressor to stop for protection in the number of times T Tilting And when the number of times is less than or equal to the preset number of times, controlling the compressor not to start shutdown protection.
Further, the compressor protection device further includes: and the timer finishes a period when the timing time of the timer reaches the preset time t, the counting module is cleared when each period starts, and the timer is cleared when each period finishes.
In some embodiments, the compressor protection device has at least two detection devices for detecting inclination angles of different directions of the compressor, and the counting module includes: counter corresponding to the detection device one by one, each counter accumulates the times T 'that the inclination angle of the corresponding detection device exceeds the preset limit value' Tilting The counting module counts the times T 'of all the counters' Tilting The times T are obtained by adding Tilting 。
Further, the detection device is connected with the power supply through the overload protector after being connected in parallel with the compressor, and any one 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 mode after being disconnected.
In some embodiments, the detection device adopts a U-shaped horizontal liquid level meter, and the end part of the U-shaped horizontal liquid level meter is provided with ventilation micropores.
The invention also proposes a refrigeration device comprising: 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, detection devices are provided on both sides of the refrigeration equipment that are adjacent to each other.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the times T of the inclination angle exceeding a preset limit value Tilting Intelligent evaluation whether the compressor is in a shaking state for a long time, if the number of times T Tilting If the number of times is larger than the preset number of times, the compressor is in a shaking state for a long time, and the compressor is started to stop for protection, so that the compressor is prevented from being damaged due to frequent start and stop; if times T Tilting If the number of times is smaller than or equal to the preset number of times, the compressor is prevented from shaking accidentally, the compressor is not started to stop for protection, the compressor can be started to operate according to refrigeration requirements, and the refrigerator compartment or indoor environment is prevented from being excessively high due to refrigeration time lag under the condition of protecting the compressor; if the compressor has started the shutdown protection, the number T of the next period is judged Tilting If the frequency is less than or equal to the preset frequency, the compressor is in a normal state or is accidentally rocked, the compressor is relieved of shutdown protection, if the frequency is less than or equal to the preset frequency, the compressor is in a rocked state for a long time, and the compressor is kept in shutdown protection;
2. when the inclination angle of the compressor exceeds a preset limit value, the compressor is started to perform power-off protection, so that the compressor is prevented from being damaged;
3. and detecting the inclination angles of at least two different directions of the compressor 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, wherein:
FIG. 1 is a schematic flow chart of a compressor protection method of the present invention;
FIG. 2 is a schematic circuit diagram of a compressor protector according to the present invention;
FIG. 3 is a schematic partial cross-sectional view of a U-shaped level gauge of the present invention;
FIG. 4 is a schematic side view of a U-shaped level gauge of the present invention;
FIG. 5 is a schematic view of the installation of the U-shaped level gauge of the present invention.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the 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 for purposes of illustration only and are not intended to limit the scope of the invention.
The principles of the present invention are described in detail below with reference to the drawings and examples.
As shown in fig. 1, the compressor protection method provided by the invention is suitable for refrigeration equipment, especially vehicle-mounted refrigeration equipment, such as a vehicle-mounted refrigerator or a vehicle-mounted air conditioner. The refrigeration equipment comprises: the compressor and the control module execute the compressor protection method, and the protection method comprises the following steps.
Step 1, detecting the inclination angle of the compressor and accumulating the times T of the inclination angle exceeding a preset limit value Tilting ；
Step 2, the times T Tilting Comparing with preset times;
step 3, selecting whether the compressor starts the shutdown protection according to the comparison result, if so, the number T Tilting The compressor is prevented from starting to stop for protection if the shaking is caused by accident, such as sudden braking in the running process of the vehicle, and the compressor can be started to run according to the refrigerating requirement, so that the refrigerating effect of the refrigerating equipment is ensured. If times T Tilting The preset times are more than the preset times, the compressor is in a shaking state for a long time, and the compressor is started to stop for protection so as to avoid frequent starting and stopping of the compressor; if the compressor has started shutdown protection, the number of times T is re-monitored Tilting Determine whether the times T Tilting And if the number of times is less than or equal to the preset number of times, the compressor is in a normal state or is accidentally rocked, the compressor is relieved of shutdown protection, and if the number of times is not less than the preset number of times, the compressor is still in a rocked state for a long time, and the compressor is kept in shutdown protection.
In order to improve judgment accuracy, the compressor protection method of the invention periodically detects the inclination angle of the compressor, wherein each preset time T is a period, and the number of times T is the beginning of each period Tilting Zero clearing, and at the end of each period, setting the times T Tilting And comparing with the preset times. By judging the unitTime-times T within preset time T Tilting It is determined whether the compressor is frequently shaken during the time. If the number of the current period is T Tilting And the preset times are not more than or equal to the preset times, the condition that the compressor accidentally shakes, the shutdown protection is not started, and the refrigeration requirement is timely met is indicated. If the number of the current period is T Tilting The preset times are more than the preset times, the compressor is continuously in a jolt and shake state, and the compressor is started to stop for protection; after the compressor starts to stop protecting, the number T of the next period is judged Tilting If the frequency is smaller than or equal to the preset frequency, the compressor is in a normal state or is accidentally rocked, the compressor is relieved of shutdown protection, and if the frequency is not smaller than the preset frequency, the compressor is still in a rocked state for a long time, and the compressor is kept in shutdown protection. In order to better protect the compressor, the compressor is started to be in power-off protection whenever the inclination angle exceeds a preset limit value, and the power-on of the compressor is restored by delaying for a preset delay time.
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 counted Tilting Comprising the following steps:
detecting inclination angles of at least two different directions of the compressor 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 of the single direction exceeds a preset limit value' Tilting ；
The times T 'of all directions' Tilting The times T are obtained by adding Tilting Number of times T 'in all directions at the beginning of each cycle' Tilting And (5) zero clearing.
It should be noted that, the preset limit value, the preset times, the preset time t and the preset delay time are all designed according to actual needs, in an embodiment of the present invention, the inclination angles of the two different directions of the compressor are detected, the preset times are 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: control module, counting module and at least one detection device, detection device detects inclination of compressorWhen the detection devices are provided with more than two detection devices, each detection device is used for detecting the inclination angles of the compressor in different directions, and the counting module accumulates the times T of the inclination angles exceeding a preset limit value Tilting The control module outputs the times T Tilting Comparing with preset times, at times T Tilting When the number of times is greater than the preset number of times, the start and stop protection of the compressor is controlled to avoid frequent start and stop of the compressor, and the number of times T is controlled Tilting And when the number of times is less than or equal to the preset number of times, 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: and the timer finishes a period when the timing time of the timer reaches the preset time t, the counting module is cleared when each period starts, and the timer is cleared when each period finishes. By judging the times T within a preset time T Tilting Judging whether the compressor frequently shakes in the time, if so, indicating that the compressor is continuously in a jolt and shake state, and needing shutdown protection, if not, indicating that the compressor accidentally shakes, and not starting the shutdown protection, thereby meeting the refrigeration requirement in time.
As shown in fig. 2, in a preferred embodiment of the present invention, the compressor protecting means has a first detecting means 5 and a second detecting means 6 for detecting inclination angles of the compressor in different directions, and the counting module includes: a first counter 3 corresponding to the first detection means 5, a second counter 4 corresponding to the second detection means 6, each counter accumulating the number T 'of times the inclination angle of its corresponding detection means exceeds a preset limit value' Tilting The counting module counts the times T 'of all the counters' Tilting The times T are obtained by adding Tilting The number of times T 'of all the counters at the beginning of each cycle' Tilting And (5) zero clearing.
In order to better protect the compressor, the detection device is connected with the compressor 7 in parallel and then connected with the power supply 1 in series by an overload protector 2, namely, different detection devices are connected in parallel, the detection device is connected with the compressor 7 in parallel, the detection device and the compressor 7 are connected with the overload protector 2 in series, when any detection device detects that the inclination angle exceeds a preset limit value, the branch is connected with the branch, the branch is in a short circuit state, the current passing through the overload protector 2 is overlarge, the overload protector 2 is triggered to be disconnected, the compressor 7 enters a power-off protection state, the overload protector 2 is reset after a preset delay time, and the compressor 7 is electrified.
As shown in fig. 3 and 4, in some embodiments, the detection device employs a U-shaped level gauge 8,U type level gauge 8 comprising: u-shaped pipe 84, rubber buffer 82, anodal terminal 81, negative pole terminal 85, but the opening of U-shaped pipe 84 sets up, and the top of the upright portion of opening both sides is equipped with anodal terminal 81, and rubber buffer 82 is used for sealing the junction between anodal terminal 81 and the upright portion, prevents that electrolyte 86 from leaking. The bent portion of the open bottom is provided with a negative terminal 85, and the inside of the u-shaped tube 84 is hollow to hold an electrolyte 86. When the U-shaped horizontal liquid level meter 8 is in a stable state, the anode and the cathode are not connected, the branch circuit of the U-shaped horizontal liquid level meter 8 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, the anode and the cathode are connected, and the branch circuit of the U-shaped horizontal liquid level meter 8 is in an on state. Meanwhile, the upright part is also provided with ventilation micropores 83, so that on one hand, the pressure difference on two sides can be balanced, and on the other hand, the sensitivity of the U-shaped tube 84 can be adjusted and checked by injecting or extracting electrolyte 86 through the ventilation micropores 83. The pore size 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 on the refrigeration device are respectively provided with a first detection device 5 and a second detection device 6, that is, two adjacent side surfaces in front, back, left and right sides of the refrigeration device are respectively provided with a detection device, which respectively reflect the unstable or unbalanced condition of the front, back, left and right directions of the compressor, so that the defects of insufficient detection sensitivity and poor protection effect in a single direction are avoided. When the detection device adopts the U-shaped horizontal liquid level meter, the detection device is fixed with the box body 9 of the refrigeration equipment through the fixing buckle 10, and fine adjustment can be performed before the fixing, so that the U-shaped horizontal liquid level meter 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 may be installed on the refrigeration apparatus or other components moving in synchronization with the compressor, as long as it reflects the inclination state of the compressor.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (8)
1. Compressor protection device, characterized in that includes:
at least one detecting device for detecting the inclination angle of the compressor, wherein the detecting device is arranged on the refrigerating equipment where the compressor is positioned or on other parts which move synchronously with the compressor;
a counting module for accumulating the times T of the inclination angle exceeding a preset limit value Tilting ；
A control module for counting the times T Tilting Comparing the comparison result with preset times, and selecting whether the compressor starts shutdown protection or not according to the comparison result;
the detection device adopts a U-shaped horizontal liquid level instrument, and the U-shaped horizontal liquid level instrument comprises: the U-shaped tube is provided with an upward opening, the positive electrode binding posts are arranged at the top ends of the upright parts at the two sides of the opening, the rubber plug is used for sealing the joint between the positive electrode binding posts and the upright parts, the negative electrode binding posts are arranged at the bending part at the bottom of the opening, the inside of the U-shaped tube is hollow for containing electrolyte, and the upright parts are also provided with ventilation micropores;
when the U-shaped horizontal liquid level instrument is in a stable state, the anode and the cathode are not connected, the branch circuit of the U-shaped horizontal liquid level instrument (8) is in an off state, when the U-shaped horizontal liquid level instrument is in an unstable state, the electrolyte can shake due to inertia and is connected with the anode and the cathode, and the branch circuit of the U-shaped horizontal liquid level instrument is in an on state.
2. The compressor protection device of claim 1, wherein the control module is configured to control the compressor protection device at the number T of times Tilting When the number of times is larger than the preset number of times, the control module controls the compressor to start and stop for protection, and the control module controls the compressor to start and stop for protection when the number of times T is larger than the preset number of times Tilting And when the number of times is smaller than or equal to the preset number of times, controlling the compressor not to start shutdown protection.
3. The compressor protector according to claim 1, wherein the compressor protector has at least two detection means for detecting inclination angles of the compressors in different directions, the counting module includes: the counters are in one-to-one correspondence with the detection devices, and each counter accumulates the times T 'that the inclination angle of the corresponding detection device exceeds a preset limit value' Tilting The counting module counts the times T 'of all the counters' Tilting Adding the times T Tilting 。
4. A compressor protection device according to any one of claims 1 to 3, further comprising: the counting module clears the timer when each period starts, and clears the timer when each period ends.
5. A compressor protection device according to any one of claims 1 to 3, wherein the detection means is connected in parallel with the compressor and is connected to a power supply via an overload protector, any one of the detection means being connected to its branch when detecting that the inclination exceeds a preset limit value, so as to trigger the overload protector to be disconnected, the overload protector being connected with a delay after disconnection.
6. Refrigeration apparatus employing a compressor protection device according to any one of claims 1 to 5.
7. The refrigeration unit as recited in claim 6 wherein said detection means is provided on each of two adjacent sides of said refrigeration unit.
8. The refrigeration appliance of claim 7 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 |
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| Publication Number | Publication Date |
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| CN113895210A CN113895210A (en) | 2022-01-07 |
| CN113895210B true CN113895210B (en) | 2023-07-25 |
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| CN202111137779.8A Active CN113895210B (en) | 2021-09-27 | 2021-09-27 | Compressor protection method, protection device and refrigeration equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP7181104B2 (en) * | 2019-01-23 | 2022-11-30 | 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 |
| CN112937256B (en) * | 2021-03-19 | 2022-12-06 | 海信空调有限公司 | Compressor oil return control method and device, parking air conditioner and storage medium |
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