CN106696810A - Refrigerator car - Google Patents

Abstract

The invention discloses a refrigerator car, which comprises a refrigerator car body (1), wherein a horizontally arranged cargo bracket (2) is arranged on the left end of the refrigerator car body (1); a hollow refrigerator car tank body (3) is fixedly arranged on the top part of the cargo bracket (2); a refrigerating system is arranged on the refrigerator car body (1), and is communicated with the refrigerator car tank body (3); the refrigerating system is used for cooling external air so as to convey the cooled air to the refrigerator car tank body (3). According to the refrigerator car disclosed by the invention, an air cooler for refrigerating can be automatically defrosted, so that the refrigerating effect of the air cooler is ensured, the service life of the air cooler is prolonged, meanwhile, extra expenditure of a user due to unnecessary electric energy loss is reduced, and the refrigerator car is promoted to be widely popularized and applied, and has an important production practice significance.

Description

a refrigerated truck

technical field

The invention relates to the technical field of refrigerated vehicles, in particular to a refrigerated vehicle.

Background technique

At present, a refrigerated truck is a transport vehicle used to transport frozen or fresh goods. It is a special refrigerated transport vehicle equipped with a refrigeration system of a refrigeration unit and a polyurethane insulated compartment.

For the refrigeration system of refrigerated vehicles, one of the necessary components is the air cooler, which is prone to frost after long-term use, which reduces the ability of the air cooler to absorb external heat loads and reduces the cooling effect of the air cooler. As a result, the overall refrigeration efficiency of the refrigeration system is reduced, resulting in unnecessary power loss.

In order to defrost the air cooler, the defrosting operation of the air cooler is generally manually controlled by people at present. The defrosting operation is generally to start the electric heating wire provided inside the air cooler, so as to realize the heating and defrosting of the air cooler. However, because people often forget to start the defrosting operation due to busy work and life, it is easy to cause the air cooler to not defrost for a long time, which seriously affects the cooling effect of the air cooler, brings unnecessary power loss, and causes additional user costs. economic expenditure.

Therefore, there is an urgent need to develop a refrigerated vehicle, which can automatically defrost the air cooler used for refrigeration, ensure the cooling effect of the air cooler, prolong the service life of the air cooler, and reduce the user's unnecessary power loss. resulting in additional economic expenditures.

Contents of the invention

In view of this, the object of the present invention is to provide a refrigerated vehicle, which can automatically defrost the air cooler used for refrigeration, ensure the cooling effect of the air cooler, prolong the service life of the air cooler, and reduce the unnecessary The additional economic expenditure brought about by the loss of electric energy is conducive to promoting the widespread application of refrigerated vehicles, which has great practical significance in production.

To this end, the present invention provides a refrigerated vehicle, comprising a refrigerated vehicle body, the left end of the refrigerated vehicle body has a cargo bracket placed horizontally, and a hollow refrigerated vehicle box body is fixedly installed on the top of the cargo bracket ;

The body of the refrigerated truck is provided with a refrigeration system, the refrigeration system communicates with the box body of the refrigerated truck, and the refrigeration system is used for cooling the external air and then transporting it to the box body of the refrigerated truck.

Wherein, the inner wall of the box body of the refrigerated vehicle is covered with at least one thermal insulation layer.

Wherein, the refrigeration system includes a compressor, a condenser, a throttle valve and a cooling fan;

Wherein, the refrigerant outlet of the compressor is connected with the refrigerant inlet of the condenser, and the refrigerant outlet of the condenser is connected with the refrigerant inlet of the cooling fan through the throttle valve, and the The refrigerant outlet of the air cooler communicates with the refrigerant inlet of the compressor;

At least one electric heating wire is arranged inside the air cooler;

The refrigeration system also includes a defrosting control unit, the defrosting control unit is respectively connected with the electric heating wire inside the compressor and the air cooler, and is used to control the heating of the electric heating wire to the air cooler. Perform defrosting operation.

Wherein, the air cooler is installed inside the box of the refrigerated truck, the compressor is installed at the lower right outside the box of the refrigerated truck, and the condenser is installed at the upper right side of the box of the refrigerated truck, The throttle valve is located between the compressor and the condenser.

Wherein, the defrosting control unit is configured to detect the running time of the compressor in each preset cycle, and when the length of the running time of the compressor is greater than or equal to a preset critical value, send a start A control signal is sent to the electric heating wire, and the electric heating wire is controlled to be turned on, so as to perform a defrosting operation on the air cooler.

Wherein, the defrosting control unit is also used to send the start control signal to The electric heating wire is controlled to turn on the electric heating wire to perform a defrosting operation on the air cooler.

Wherein, the defrosting control unit is also connected with the compressor, and is used to calculate and obtain the Each running time of the compressor is then accumulated in real time to finally obtain the running time of the compressor within the preset cycle period.

Wherein, the defrosting control unit is also connected with at least one temperature sensor, the temperature sensor is located in the box of the refrigerated truck, and the temperature sensor is used to detect the temperature value in the box of the refrigerated truck in real time and send to said defrost control unit;

Correspondingly, the defrosting control unit is configured to receive the temperature value sent by the temperature sensor in real time and record the receiving time in real time in each preset cycle period. When there is a cooling time interval in which the temperature value continues to decrease, Each cooling time interval is accumulated in real time, and finally all the cooling time intervals in the preset cycle period are obtained and defined as the running time of the compressor in the preset cycle period.

Wherein, the defrosting control unit is also connected to a power supply module in the compressor, and the power supply module is used to provide working power for the compressor;

Correspondingly, the defrosting control unit is also used to detect in real time the change of the current output value of the power supply module in the compressor and record the detection moment in real time during each preset cycle period. When increasing the current increase time interval, each current increase time interval is accumulated in real time, and finally all the current increase time intervals in the preset cycle period are obtained and defined as the running time of the compressor in the preset cycle period.

Wherein, an electric heating switch is connected to the electric heating wire;

The defrosting control unit is further configured to send a shutdown signal to the electric heating switch connected to the electric heating wire within a preset period of time after controlling to turn on the electric heating wire to defrost the air cooler , control to turn off the electric heating wire.

It can be seen from the above technical solutions provided by the present invention that, compared with the prior art, the present invention provides a refrigerated truck, which can automatically defrost the air cooler used for refrigeration, so as to ensure the cooling effect of the air cooler and prolong the cooling time of the cold air. The service life of the refrigerated truck can be extended, and the additional economic expenditure caused by the unnecessary power consumption of the user can be reduced.

Description of drawings

Fig. 1 is a schematic diagram of the appearance structure of a refrigerated vehicle provided by the present invention;

Fig. 2 is a structural block diagram of an embodiment of a refrigerated vehicle provided by the present invention;

In the figure, 1 is the body of the refrigerated truck, 2 is the cargo bracket, 3 is the box body of the refrigerated truck, 4 is the compressor, 5 is the condenser, 6 is the throttle valve, 7 is the air cooler, 8 is the electric heating wire, 10 is a defrosting control unit.

detailed description

In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

Referring to FIG. 1 and FIG. 2 , the present invention provides a refrigerated truck, which can freely move goods to a user's desired destination after preservation or freezing. The refrigerated truck includes a freely movable refrigerated truck body 1 . The body of the refrigerated truck has the performance of being convenient and light to move.

In the present invention, the left end of the refrigerated vehicle body 1 has a cargo bracket 2 placed horizontally, and a hollow refrigerated vehicle box 3 is fixedly installed on the top of the cargo bracket 2, and the refrigerated vehicle box 3 is used for It is used to store goods that need to be refrigerated for transportation.

In terms of specific implementation, the inner wall of the refrigerated vehicle box 3 is preferably covered with at least one thermal insulation layer, so that the refrigerated vehicle box 3 becomes a box body with a thermal insulation function.

In terms of specific implementation, the refrigerated truck body 1 is preferably a closed van transport vehicle, of course, it can also be any other motor vehicle that can be installed with a refrigerated truck box.

In terms of specific implementation, in order to enhance the thermal insulation effect of the box body 3 of the refrigerated vehicle, the thermal insulation layer is preferably a thermal insulation layer made of polyurethane material.

In the present invention, in order to cool and refrigerate the goods placed in the refrigerated truck body 1, a refrigeration system is provided on the refrigerated truck body 1, and the refrigeration system communicates with the refrigerated truck body 3, The refrigerating system is used to cool down the external air and deliver it to the box body 3 of the refrigerated vehicle.

In the present invention, specifically, the refrigeration system includes a compressor 4, a condenser 5, a throttle valve 6 and a cooling fan 7;

Wherein, the refrigerant outlet of the compressor 4 is connected with the refrigerant inlet of the condenser 5, and the refrigerant outlet of the condenser 2 is connected with the refrigerant inlet of the air cooler 7 through the throttle valve 6. The refrigerant outlet of the cooling fan 7 is connected with the refrigerant inlet of the compressor 4 .

Specifically, the power source of the compressor 4 can be the generator in the refrigerated vehicle body 1 (that is, the internal power source) or any external power source that can provide the driving voltage, and it can be between these two power sources Switch freely.

In terms of specific implementation, at least one electric heating wire 8 is arranged inside the air cooler 7 , and the electric heating wire 8 will dissipate heat to the outside after being energized, thereby heating the air cooler 7 to realize defrosting treatment.

Referring to FIG. 1 , in terms of specific implementation, the air cooler 7 is installed inside the box body 3 of the refrigerated vehicle, preferably at the upper right corner inside the box body 3 of the refrigerated vehicle.

In terms of specific implementation, the compressor 4 is installed on the lower right outside of the refrigerated truck box 3, the condenser 5 is installed on the upper right side of the refrigerated truck box 3, and the throttle valve 6 is located on the right side of the refrigerated truck box 3. The position between the compressor 4 and the condenser 5 can effectively save the required connecting pipe length, reduce the overall production cost of the refrigeration system, and help make the overall volume of the refrigeration system of the refrigerated truck of the present invention compact and more beautiful.

It should be noted that the compressor 4 is used to compress the low-temperature and low-pressure refrigerant into a high-temperature and high-pressure refrigerant. Evaporation is carried out in the refrigerated vehicle, so as to realize the cooling of the inside of the refrigerated vehicle box 3 and realize the refrigeration cycle.

In the present invention, it should also be noted that the gaseous refrigerant formed after being evaporated in the air cooler 7 continues to circulate into the compressor 4, realizing the recycling of the refrigerant.

Specifically, the throttle valve 6 is used to control the refrigerant flow rate between the condenser 5 and the cooling fan 7 . In terms of specific implementation, the throttle valve 6 may be a thermal expansion valve or an electromagnetic expansion valve.

In the present invention, referring to FIG. 2 , in order to automatically defrost the air cooler 7, the refrigeration system further includes a defrosting control unit 10, which is connected to the compressor respectively. The machine 10 is connected with the electric heating wire 8 inside the air cooler 7, and is used to detect the running time of the compressor 4 in each preset cycle, when the running time of the compressor 4 is longer than Or when it is equal to the preset critical value, send a start control signal to the electric heating wire 8 to control the opening of the electric heating wire 8, so as to perform a defrosting operation on the air cooler 7, that is, the defrosting control unit 10 uses To control the electric heating wire 8 to defrost the air cooler 7 .

It should be noted that each preset cycle period may be a time period set by the user for cyclic execution, for example, it may be every day, every hour, or every 3 hours, and of course it may be any other time period. The preset critical value can be pre-set arbitrarily according to the needs of the user, for example, it can be half a day (12 hours). If the preset critical value is not reached, no defrosting operation will be performed.

In the present invention, in specific implementation, in order to detect the running time of the compressor 4 in each preset cycle, the defrosting control unit 10 is also used to , by recording in real time the starting time and stopping time of each operation of the compressor 4, calculating and obtaining each running time of the compressor 4, and then accumulating in real time, and finally obtaining all The running time of the above-mentioned compressor (that is, the running time of the compressor after multiple runs is summed up).

It should be noted that the defrosting control unit 10 can read the start-up signal and the stop-run signal in the compressor 4 and record obtained at the corresponding moment.

In the present invention, in specific implementation, in order to detect the running time of the compressor 4 in each preset cycle, the defrosting control unit can also be connected with at least one temperature sensor, and the temperature sensor is located at the In the refrigerated vehicle box 3, the temperature sensor is used to detect the temperature value in the refrigerated vehicle box 3 in real time and send it to the defrosting control unit 10;

Correspondingly, the defrosting control unit 10 is configured to receive the temperature value sent by the temperature sensor in real time and record the receiving time in real time in each preset cycle period, when there is a cooling time interval in which the temperature value continues to decrease , real-time accumulation of each cooling time interval, and finally obtain all the cooling time intervals in the preset cycle period and define it as the running time of the compressor in the preset cycle period (that is, the compressor 4 makes refrigeration after operation) time with cooling effect in the system).

In the present invention, in specific implementation, in order to detect the running time of the compressor 4 in each preset cycle, the defrosting control unit 10 can also be connected with the power supply module in the compressor 4 , the power supply module is used to provide working power for the compressor 4 (for example, it can be a transformer connected to an external AC power supply);

Correspondingly, the defrosting control unit 10 is also used to detect in real time the change of the current output value of the power supply module in the compressor 4 and record the detection time in real time during each preset cycle period. When there is a current output When the value continues to increase in the current increase time interval, each current increase time interval is accumulated in real time, and finally all the current increase time intervals in the preset cycle are obtained and defined as the running time of the compressor in the preset cycle (i.e. the time the compressor needs to consume electricity after running).

In the present invention, in order to carry out the defrosting operation in the low-frequency use time period or the non-use time period of the compressor 4, the effect of defrosting the air cooler 7 is improved, and the defrosting operation of the air cooler is avoided. The conventional operation of the cooling fan for evaporative cooling and cooling required by the system does not conflict, that is to say, when the compressor is in cooling operation, the electric heating wire does not operate and does not perform defrosting operation. For this reason, the defrosting control unit 10 is also used to resend the startup control during the non-use time interval in each preset cycle when the running time of the compressor is greater than or equal to the preset critical value. The signal is sent to the electric heating wire 8, and the control turns on the electric heating wire 8 to perform the defrosting operation on the air cooler 7;

In terms of specific implementation, the non-use time interval in each preset cycle is specifically: in each preset cycle, other time intervals other than the running time of the compressor. In specific implementation, the non-use time interval in each preset cycle period can be: in each preset cycle period, according to the start-up time and stop operation time of each operation of the compressor 4 recorded in real time Moment, other time intervals other than each running time interval of the compressor 4 obtained; or: in each preset cycle period, other time intervals other than the cooling time interval each time: or: In each preset cycle period, each time the current increases other time intervals than the time interval.

It should be noted that, the non-use time interval of the compressor 4 can be obtained by elimination method. For example, after recording, 8:00 am to 10:00 am and 2:00 pm to 4:00 pm are the time intervals of each operation of the compressor 4, and then other time intervals are the time intervals of the compressor 4 in the preset cycle. Non-use time interval.

In the present invention, specifically, an electric heating switch is connected to the electric heating wire 8, and the electric heating switch can be a solenoid valve, so that the defrosting control unit 10 can send a start control signal to the The electric heating switch controls to turn on the electric heating wire 8 , of course, it can also send an off signal to the electric heating switch to control to turn off the electric heating wire 8 .

In the present invention, specifically, the defrosting control unit 10 is further configured to control and turn on the electric heating wire 8 to perform the defrosting operation on the air cooler 7 within a preset period of time (for example, 10 minutes) to send a closing signal to the electric heating switch connected to the electric heating wire 8 to control and close the electric heating wire 8, so as to ensure the defrosting effect of the air cooler and control the time for defrosting operation, Avoid defrosting operation for too long, so as to avoid unnecessary power loss.

In the present invention, in specific implementation, the defrosting control unit 10 may be a central processing unit CPU, a digital signal processor DSP or a single-chip microcomputer MCU.

Therefore, for a refrigerated vehicle provided by the present invention, it can dynamically adjust The cycle of defrosting is adjusted to the low-peak operation time period of the refrigeration system (that is, the non-use time period of the compressor), so that people's work and life can be facilitated, and there is no need to greatly increase the purchase cost of hardware.

To sum up, compared with the prior art, the refrigerated vehicle provided by the present invention can automatically defrost the air cooler used for refrigeration, so as to ensure the cooling effect of the air cooler and prolong the service life of the air cooler. At the same time, it reduces the additional economic expenditure caused by unnecessary power loss of users, which is conducive to promoting the widespread application of refrigerated vehicles, and has great practical significance in production.

In addition, the refrigerated vehicle provided by the present invention can avoid manual intervention in the defrosting operation, and has flexible design and strong operability.

The above is only a preferred embodiment of the present invention, and it should be pointed out that for those of ordinary skill in the art, some improvements and modifications can be made without departing from the principle of the present invention. It should be regarded as the protection scope of the present invention.

Claims (10)

1. a kind of refrigerator car, it is characterised in that including refrigerator car car body (1), the left end of the refrigerator car car body (1) has level The goods bracket (2) of placement, is installed with hollow refrigerator car casing (3) at the top of the goods bracket (2)；

The refrigerator car car body (1)) on be provided with a refrigeration system, the refrigeration system and refrigerator car casing (3) phase Connection, the refrigeration system is used to be conveyed to the refrigerator car casing (3) after carrying out cooling treatment to outside air.

2. refrigerator car as claimed in claim 1, it is characterised in that the inwall of the refrigerator car casing (3) is coated with least Layer heat-insulation layer.

3. refrigerator car as claimed in claim 1, it is characterised in that the refrigeration system include compressor (4), condenser (5), Choke valve 6 and air-cooler (7)；

Wherein, the refrigerant outlet of the compressor 4 is connected with the refrigerant inlet of the condenser (5), the condenser (2 refrigerant outlet is connected by the choke valve (6) with the refrigerant inlet of the air-cooler (7), the air-cooler (7) refrigerant outlet is connected with the refrigerant inlet of the compressor (4)；

The air-cooler (7) is internally provided with least one electrical heating wire (8)；

The refrigeration system also include one defrosting control unit (10), it is described defrosting control unit (10) respectively with the compression Machine (10) electrical heating wire (8) internal with the air-cooler (7) is connected, for controlling the electrical heating wire (8) to described cold Blower fan (7) carries out defrosting operation.

4. refrigerator car as claimed in claim 3, it is characterised in that the air-cooler (7) is installed on the refrigerator car casing (3) Inside, the compressor (4) is installed on the outside lower right-hand side of the refrigerator car casing (3), and the condenser (5) is installed on described The outside right side top of refrigerator car casing (3), position of the choke valve (6) between the compressor (4) and condenser (5) Put.

5. the refrigerator car as described in claim 3 or 4, it is characterised in that the defrosting control unit (10), for pre- at each If in cycle period, detecting the run time of the compressor, be more than when the time span of the run time of the compressor or During equal to preset critical, send startup control signal and give the electrical heating wire (8), the electrical heating wire (8) is opened in control, from And defrosting operation is carried out to the air-cooler (7).

6. the refrigerator car as described in claim 3 or 4, it is characterised in that the defrosting control unit (10) is additionally operable to when the pressure When the time span of the run time of contracting machine is more than or equal to preset critical, the non-usage in each preset loop cycles Startup control signal is retransmited in time interval to the electrical heating wire (8), control opens the electrical heating wire (8) to described cold Blower fan (7) carries out defrosting operation.

7. the refrigerator car as described in claim 3 or 4, it is characterised in that the defrosting control unit (10) also with the compression Machine (4) is connected, in each preset loop cycles, opening during by compressor described in real time record (4) each run The dynamic time of running and moment out of service, each run time for obtaining the compressor (4) is calculated, it is then real-time accumulated, most The run time of the compressor in the preset loop cycles is obtained eventually.

8. the refrigerator car as described in claim 3 or 4, it is characterised in that the defrosting control unit (10) is also with least one Temperature sensor is connected, and the temperature sensor is located in the refrigerator car casing (3), and the temperature sensor is used for real-time Detect the temperature value in the refrigerator car casing (3) and be sent to defrosting control unit (10)；

Accordingly, defrosting control unit (10), in each preset loop cycles, TEMP described in real-time reception It is temperature value that device is sent and the real time record time of reception, tired in real time when there is temperature fall time that temperature value persistently reduces and be interval The each temperature fall time of meter is interval, finally obtains the interval of the whole temperature fall times in the preset loop cycles and is defined as this and presets The run time of the compressor in cycle period.

9. the refrigerator car as described in claim 3 or 4, it is characterised in that the defrosting control unit (10) also with the compression The power supply module having in machine (4) is connected, and the power supply module is used to provide work electricity consumption for the compressor；

Accordingly, defrosting control unit (10) is additionally operable in each preset loop cycles, compressor described in real-time detection (4) the current output value situation of change and real time record detection moment of the power supply module having in, hold when there is current output value It is real-time accumulated to increase time interval per primary current when continuous increased electric current increases time interval, finally obtain preset loop week Whole electric currents in phase increase the run time of time interval and the compressor being defined as in the preset loop cycles.

10. the refrigerator car as described in claim 3 or 4, it is characterised in that be connected with an electricity on the electrical heating wire (8) and add Thermal switch；

Defrosting control unit (10), is additionally operable to remove the air-cooler (7) in the control unlatching electrical heating wire (8) After frost operation, the electrical heating switch that shutdown signal is connected to the electrical heating wire (8), control are sent in predetermined time period Close the electrical heating wire (8).