TW202117247A - Refrigeration device and operation method of refrigeration device which can dry the inner wall surface of a vehicle compartment by vaporizing moisture frosted or condensed on the inner wall surface of the vehicle compartment - Google Patents

Abstract

The subject of the invention is to dry the inner wall surface of a vehicle compartment by vaporizing moisture frosted or condensed on the inner wall surface of the vehicle compartment. To achieve the subject, the invention utilizes a heat-pump refrigeration device to alternately perform heating and cooling operations. After vaporizing the moisture frosted or condensed on the inner wall surface of the vehicle compartment, the condensed water is condensed in the heat exchanger inside the vehicle compartment and discharged out of the vehicle compartment. The refrigeration device of the invention includes a compressor for compressing refrigerant, an external heat exchanger for performing heat exchange with the air outside the vehicle compartment, an external air blower corresponding to the external heat exchanger, an internal heat exchanger for performing heat exchange with the air inside the vehicle compartment, an internal air blower corresponding to the internal heat exchanger, a first temperature detector for detecting the air temperature in the vehicle compartment, a second temperature detector disposed on or near the internal heat exchanger, and a control device for controlling and switching the cooling operation and the heating operation. In a defrosting mode, the refrigeration device executes the cooling operation and/or the heating operation until reaching a defrosting end time so that the detected temperature of the first temperature detector is a first set temperature. In a dehumidification mode, the cooling operation is executed until first reaching any one of the following times, that is, the time that the detected temperature of the second temperature detector reaches the second set temperature configured to be lower than the first set temperature, and the dehumidification end time. In a drying mode, the drying operation is executed until reaching a predetermined drying time. The drying operation is provided to alternately repeat the defrosting mode and the dehumidification mode.

Description

Refrigeration device and operation method of refrigeration device

Field of invention

The present invention relates to a freezing device and an operating method of the freezing device, in particular to a freezing device capable of selectively performing cooling operation and heating operation, and an operating method of the freezing device.

Background of the invention

As a refrigerated car used in constant temperature distribution, the refrigerated car is equipped with a refrigerating device that can selectively heat and cool the compartment in order to keep the cargo loaded in the compartment at the optimum temperature without being affected by the outside temperature. It is put into practical use and can be used in a wide set temperature range suitable for the loaded cargo, such as -25℃～-18℃, 0℃～5℃, 5℃～12℃, etc. In a refrigerated vehicle capable of changing the temperature in the vehicle compartment, if the temperature in the compartment is changed to perform constant temperature delivery of goods with different storage temperatures, the operating rate of the vehicle will increase. Furthermore, a refrigerated vehicle that divides the interior of the vehicle into two sections and can change the temperature of each section can deliver goods with different storage temperatures at the same time, so the transportation efficiency is improved. However, a refrigerated vehicle carrying cargo in a compartment that has been cooled to a low temperature has the following situation: Since the door of the compartment is opened and closed when loading and unloading the cargo, the outside air containing moisture flows into the compartment, and the moisture contained in the outside air is on the inner wall of the compartment. And the heat exchanger is frosted or condensed.

Patent Document 1 describes a transport refrigeration unit that performs a defrosting operation on the outdoor heat exchanger when the vehicle engine is stopped and/or the door is opened, or when the operation of the refrigeration unit 1 is stopped. In addition, Patent Document 2 describes a vehicle refrigerating loop system that performs a dehumidification operation to cool the cargo compartment at an evaporation temperature higher than the temperature at which frost forms in the evaporator. [Background Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2015-117889 [Patent Document 2] Japanese Patent Laid-Open No. 2014-088970

[The problem to be solved by the invention]

However, in a refrigerated car equipped with a refrigerating device that can selectively perform cooling operation and heating operation, when goods with a storage temperature of low temperature are delivered and then goods with a storage temperature of room temperature are delivered, the temperature in the compartment that has been cooled before is After the temperature rises to the vicinity of the outside air temperature, cargoes stored at room temperature are loaded and delivered.

However, if the cabin door is opened while the cabin is still at a low temperature without preventing the inflow of outside air, then due to the difference in temperature and humidity between the cabin and the outside air, there may be moisture in the outside air flowing into the cabin on the inner wall of the cabin. There is a concern that the top wall, side wall, floor, etc. of frost or dew may wet the cargo, so there is a problem that it is impossible to load cargo with a storage temperature of room temperature immediately.

In the transport refrigeration unit as described above, although the heat exchanger can be defrosted, it is difficult to vaporize the frosted or dew-condensed moisture on the inner wall surface of the vehicle compartment and then condense and discharge it out of the vehicle compartment. In addition, since there is a difference in heat capacity between the wall constituting the vehicle compartment and the air in the vehicle compartment, the surface temperature of the inner wall surface of the vehicle compartment changes later than the temperature of the air in the vehicle compartment. Therefore, in the refrigerated loop system for a vehicle that stops the dehumidification operation after the temperature in the cargo compartment reaches a predetermined temperature, it is difficult to vaporize the frosted or dew-condensed moisture on the inner wall surface of the vehicle cabin to dry the inner wall surface of the vehicle cabin.

Therefore, the object of the subject of the present invention is to vaporize and condense moisture in the outside air that flows into the vehicle cabin and is frosted or condensed on the inner wall surface of the vehicle cabin and discharges the moisture to the outside of the vehicle cabin to dry the inner wall surface of the vehicle cabin. [Means to solve the problem]

In order to achieve the above-mentioned object, the present invention has the following configuration. (1) A refrigeration device capable of switching between a cooling operation for cooling the interior of a compartment framed in a vehicle and a warming operation for heating the interior of the vehicle, characterized by: Compressor, compressed refrigerant; External heat exchanger, heat exchange with the air outside the compartment; The outside air blower corresponds to the outside heat exchanger; In-compartment heat exchanger for heat exchange with the air in the aforementioned compartment; The inside air blower corresponds to the inside heat exchanger; The first temperature detector detects the air temperature in the aforementioned compartment; The second temperature detector is located at or near the aforementioned indoor heat exchanger; and The control device controls the switching of the aforementioned cooling operation and the aforementioned heating operation; And the aforementioned refrigeration device has the following functions: The function of the defrost mode is to execute the aforementioned cooling operation and/or the aforementioned heating operation until the defrost end time is reached, so that the detected temperature of the aforementioned first temperature detector is the first set temperature; The function of the dehumidification mode, executes the aforementioned cooling operation until one of the following times is reached first: the time until the detection temperature of the aforementioned second temperature detector reaches the second set temperature set below the aforementioned first set temperature, or the dehumidification end time ;and The function of the drying mode is to perform a drying operation until a predetermined drying time is reached, and the drying operation is to alternately repeat the defrosting mode and the dehumidifying mode.

(2) A refrigeration device capable of switching between the following three types of operations performed on a compartment framed in a vehicle and divided into two parts: Cooling operation, cooling at least one part of the compartment; Warming operation, heating at least one part of the compartment; and Cold heating operation, cooling one of the compartments, and heating the other compartment; The aforementioned refrigeration device is characterized by: Compressor, compressed refrigerant; External heat exchanger, heat exchange with the air outside the compartment; The outside air blower corresponds to the aforementioned outside heat exchanger; and A control device that controls the switching of the aforementioned cooling operation, the aforementioned heating operation, and the aforementioned cold heating operation; In each of the aforementioned compartments, there are: (A) In-compartment heat exchanger to exchange heat with the air in the aforementioned compartment; (B) Air blower in the compartment, corresponding to the heat exchanger in the compartment; (C) The first temperature detector detects the air temperature in the aforementioned compartment; and (D) The second temperature detector is located at or near the aforementioned indoor heat exchanger; And the aforementioned refrigeration device has the following functions: The function of the defrost mode is to execute the aforementioned cooling operation and/or the aforementioned heating operation until the defrost end time is reached, so that the detected temperature of the aforementioned first temperature detector is the first set temperature; The function of the dehumidification mode, executes the aforementioned cooling operation until one of the following times is reached first: the time until the detection temperature of the aforementioned second temperature detector reaches the second set temperature set below the aforementioned first set temperature, or the dehumidification end time ;and The function of the drying mode is to perform a drying operation until a predetermined drying time is reached, and the drying operation is to alternately repeat the defrosting mode and the dehumidifying mode.

(3) The refrigeration device according to (1) or (2), which has the function of switching from the drying mode to the temperature adjustment mode when the drying operation reaches the drying time, and to perform the heating operation and/ Or the temperature control operation is performed by the cooling operation so that the detected temperature of the first temperature detector becomes the set temperature in the cabin.

(4) The refrigerating device according to any one of (1) to (3), which has a function of continuously or intermittently performing the operation of the aforementioned indoor air blower.

(5) The refrigeration system according to any one of (1) to (4), wherein the first temperature detector detects the temperature of the air flowing into the indoor heat exchanger, and the second temperature detector detects the following temperature At least one of: the temperature of the refrigerant piping through which the refrigerant that has passed through the indoor heat exchanger circulates, the temperature of the refrigerant piping inside the indoor heat exchanger, the temperature of the fins of the indoor heat exchanger, and the temperature of the fins that pass through the indoor heat exchanger The saturation temperature obtained by conversion of the pressure of the refrigerant of the cooling medium, and the temperature of the refrigerant obtained by measuring the temperature of the refrigerant in the refrigerant piping.

(6) A method of operating a refrigerating device, wherein the refrigerating device can switch between a cooling operation for cooling the interior of a compartment rack mounted on a vehicle and a warming operation for heating the interior of the vehicle, characterized in that the refrigerating device have: Compressor, compressed refrigerant; External heat exchanger, heat exchange with the air outside the compartment; The outside air blower corresponds to the outside heat exchanger; In-compartment heat exchanger for heat exchange with the air in the aforementioned compartment; The inside air blower corresponds to the inside heat exchanger; The first temperature detector detects the air temperature in the aforementioned compartment; The second temperature detector is located at or near the aforementioned indoor heat exchanger; and The control device controls the switching of the aforementioned cooling operation and the aforementioned heating operation; And the operation method of the aforementioned refrigeration device includes the following steps: In the defrosting step, the cooling operation or the heating operation is performed until the defrosting end time is reached, so that the detected temperature of the first temperature detector is the first set temperature; In the dehumidification step, the cooling operation is performed until any one of the following times is reached first: that is, the time until the detection temperature of the second temperature detector reaches the second set temperature set to be lower than the first set temperature, or the dehumidification end time; and In the drying step, a drying operation is performed until the drying time is reached, and the drying operation is to alternately repeat the defrosting step and the dehumidifying step.

(7) A method of operating a refrigerating device, wherein the aforementioned refrigerating device can switch between the following three types of operations performed on a compartment framed on a vehicle and divided into two compartments: Cooling operation, cooling at least one part of the compartment; Warming operation, heating at least one part of the compartment; and Cold heating operation, cooling one of the compartments, and heating the other compartment; The operating method of the aforementioned refrigerating device is characterized in that the aforementioned refrigerating device includes: Compressor, compressed refrigerant; External heat exchanger, heat exchange with the air outside the compartment; The outside air blower corresponds to the outside heat exchanger; and A control device that controls the switching of the aforementioned cooling operation, the aforementioned heating operation, and the aforementioned cold heating operation; In each of the aforementioned compartments, there are: (A) In-compartment heat exchanger to exchange heat with the air in the aforementioned compartment; (B) In-car air blower, corresponding to the aforementioned in-car heat exchanger; (C) The first temperature detector detects the air temperature in the aforementioned compartment; and (D) The second temperature detector is located at or near the aforementioned indoor heat exchanger; The compartment drying operation of the aforementioned compartment drying includes the following steps: In the defrosting step, the cooling operation or the heating operation is performed until the defrosting end time is reached, so that the detected temperature of the first temperature detector is the first set temperature; In the dehumidification step, the cooling operation is performed until any one of the following times is reached first: that is, the time until the detection temperature of the second temperature detector reaches the second set temperature set to be lower than the first set temperature, or the dehumidification end time; and In the drying step, a drying operation is performed until the drying time is reached, and the drying operation is to alternately repeat the defrosting step and the dehumidifying step.

(8) The operating method of the refrigeration device according to (6) or (7), which includes a temperature adjustment step, and when the drying step reaches the drying time, the drying step is changed to the temperature adjustment step, and the aforementioned heating step is performed. The temperature control operation is performed by the warm operation and/or the cooling operation so that the detected temperature of the first temperature detector becomes the set temperature in the cabin.

(9) The operation method of the refrigeration device according to any one of (6) to (8), which has the step of continuously or intermittently performing the operation of the aforementioned indoor air blower. Invention effect

According to the present invention, in the drying mode in which the defrosting mode and the dehumidifying mode are repeated before the predetermined drying time is reached, the heating operation and the cooling operation are repeatedly performed based on the detected temperatures of the first temperature detector and the second temperature detector, so The cabin temperature of the cabin is controlled in the following manner: it repeatedly rises between the temperature suitable for vaporizing the moisture that has formed on the inner wall surface of the cabin and the temperature suitable for condensing the vaporized moisture in the indoor heat exchanger. And drop. Thereby, the vaporization of the moisture on the inner wall surface of the vehicle cabin and the condensation in the indoor heat exchanger can be alternately performed to effectively discharge the condensed water outside the vehicle cabin, and the time required for drying the inner wall surface of the vehicle cabin can be shortened.

Furthermore, in the defrosting mode, the cooling operation and/or the heating operation are performed until the predetermined defrosting end time is reached, so that the detected temperature of the first temperature detector is the first set temperature, so that the temperature change rate is accelerated The vaporization of frost or dew on the inner wall surface of the passenger compartment slower than the air in the passenger compartment can shorten the time required for the drying of the inner wall surface of the passenger compartment.

In addition, because in the dehumidification mode, the cooling operation is performed until one of the following times is reached first: that is, the time until the detection temperature of the second temperature detector reaches the second set temperature that is set below the first set temperature, or the dehumidification end time Therefore, the vaporized moisture in the cabin can be condensed in the indoor heat exchanger and the condensed water can be discharged outside the cabin. Furthermore, since the dehumidification mode is switched to the defrosting mode to execute the warming operation immediately after the cooling operation is completed, the temperature of the inner wall surface of the vehicle cabin can be rapidly increased.

In addition, in a refrigerated vehicle that divides the interior of the vehicle into two compartments, the delivery efficiency is improved by drying the interior of one of the vehicles in which the delivered goods have been emptied before the other.

In addition, since the heating of the cabin and the condensation of vaporized moisture are performed in the indoor heat exchanger, there is no need to install a heat exchanger or an electric heater for heating the cabin, and the refrigeration device can be lightened.

When using the defrost mode to warm the cabin, the heat energy in the outside air recovered in the outdoor heat exchanger is used for heating in the cabin because the heat in the exterior heat exchanger is used to heat the cabin. Therefore, the refrigerant is heated by the compressor and the cabin. Circulation between the exchangers, compared with the heating method in which only the heat energy of the gas discharged from the compressor is radiated by the heat exchanger in the cabin, the heating capacity for heating the cabin is higher, and the temperature of the inner wall surface of the cabin can be quickly increased. rise.

Because the first temperature detector detects the temperature of the air flowing into the indoor heat exchanger and detects the temperature of the air stirred in the cabin by the air blower in the cabin when it flows into the indoor heat exchanger, it reflects the temperature of the air in the cabin and is very important for the cabin. The response delay to the change of the internal air temperature is less. In addition, because the second temperature detector detects at least one of the following temperatures: the temperature of the refrigerant piping through which the refrigerant flowing out of the indoor heat exchanger circulates, the temperature of the refrigerant piping of the indoor heat exchanger, and the fins of the indoor heat exchanger The temperature, the saturation temperature obtained by converting the pressure of the refrigerant passing through the indoor heat exchanger, and the refrigerant temperature obtained by measuring the temperature of the refrigerant passing through the refrigerant piping, can quickly detect that the vaporized moisture has been in the indoor heat exchanger Condensation.

Furthermore, because the first temperature detector can also be used as a temperature sensor for detecting the temperature of the air flowing into the indoor heat exchanger, which becomes the representative temperature in the vehicle cabin, the second temperature detector can also be used as a temperature sensor for detecting the refrigerant flowing out of the indoor heat exchanger. A defrost sensor that detects the temperature of the circulating refrigerant piping and detects the frosting state. Therefore, it is possible to construct a refrigeration device that does not add a temperature sensor, and makes it flow into the vehicle compartment to form frost or dew on the inner wall of the vehicle compartment. The moisture in the outside air vaporizes and condenses and drains the condensed water out of the vehicle compartment to dry the inner wall of the vehicle compartment.

If the operation of the indoor air blower is performed continuously, the air blown by the indoor air blower promotes the vaporization of frost or dew on the inner wall surface of the vehicle cabin and the condensation of moisture in the indoor heat exchanger. In addition, if the operation of the indoor air blower is performed intermittently, it is possible to prevent the water that has condensed in the indoor heat exchanger from scattering and quickly discharge the condensed water outside the vehicle cabin. By continuously or intermittently operating the indoor air blower, it is possible to selectively promote condensation of moisture in the indoor heat exchanger and prevent scattering.

This is because when the elapsed time reaches the predetermined drying time, it changes from the drying mode to the temperature adjustment mode, and executes the heating operation and/or cooling operation so that the detected temperature of the first temperature detector becomes the first setting in the temperature adjustment mode The temperature control operation is performed by the temperature method, so before the drying operation starts, the first set temperature suitable for the newly loaded cargo can be set in advance, so that the interior of the vehicle can be set to the storage temperature suitable for the new cargo. In addition, when the first set temperature in the temperature adjustment mode is not set, the refrigeration device stops when the predetermined drying time ends.

[Illustration brief description]

The form used to implement the invention

Hereinafter, the refrigeration system according to the embodiment of the present invention will be described with reference to the drawings.

(1) Embodiment 1 The refrigerating vehicle 1 equipped with the refrigerating apparatus according to Embodiment 1 of the present invention will be described with reference to the drawings. As shown in Fig. 1, the refrigerating vehicle 1 includes: a vehicle compartment 2, an interior 21 of the vehicle compartment, a compressor 3 constituting a refrigerating device, an outdoor heat exchanger 4, an outdoor blower 5, and an indoor heat exchanger 6 corresponding to the vehicle compartment 2. , The cabin air blower 7, the first temperature detector TR that detects the air temperature in the cabin, the second temperature detector TH provided near the cabin heat exchanger, the control device 8, the drain pan 9, and the drain pipe 10.

As shown in Fig. 2, by connecting the equipment constituting the refrigerating device via a refrigerant pipe, a cooling loop and a heat pump heating loop are formed as known.

As shown in FIGS. 2 and 3, when the control device 8 controls the valve of the piping unit 30 to cool the cabin 21 of the cabin 2, the refrigerant discharged from the compressor 3 is condensed in the outdoor heat exchanger 4. , And the refrigerant flows so as to evaporate in the indoor heat exchanger 6, and the cabin 21 of the cabin 2 is cooled. At this time, when the temperature of the fins of the indoor heat exchanger 6 is below the dew point temperature and is not frozen, the air sent by the indoor blower 7 is used to cause the moisture contained in the air in the cabin 21 of the cabin 2 to remain in the cabin. The surface of the fins of the internal heat exchanger 6 is condensed and discharged out of the vehicle cabin through the drain pan 9 and the drain pipe 10.

In addition, in the case of heating the cabin 21 of the cabin 2, the refrigerant discharged from the compressor 3 is condensed in the indoor heat exchanger 6 and evaporated in the outdoor heat exchanger 4 to flow the refrigerant. The cabin 21 of the cabin 2 is heated. At this time, before heating the cabin 21 of the cabin 2, frost or dew on the top walls, side walls, and floors constituting the inner wall surface 40 of the cabin 2 vaporizes as the temperature of the cabin 21 of the cabin 2 rises. And until the defrosting end time is reached, the vaporization is promoted by maintaining the first set temperature.

Here, the operating state based on the setting example is shown with reference to FIG. 4, FIG. 5, FIG. 6, and FIG. (Setting example: (1) During drying operation, the first set temperature (TRS, defrost set temperature) = 30°C, the second set temperature (THS, dehumidification set temperature) = 3°C, drying time (DTS) = 1.5hr , (2) The set temperature of the cabin after the drying operation (temperature control operation) = 5°C) When the cabin 2 is set to the set temperature of -25°C and the temperature adjustment operation is performed, if the first set temperature TRS=30°C, the second set temperature THS=3°C, and the drying time DTS=1.5 during the drying operation are input to the control device 8. hr. The set temperature of the compartment after the drying operation is completed = 5°C, and an instruction to start the drying operation is input to the control device 8. As shown in Fig. 4, (a) the detection of the first temperature detector TR by the control device 8 The temperature (TRM) -25°C and the first set temperature (TRS) 30°C are compared. Because the detection temperature (TRM) -25°C in the cabin is lower than the first set temperature (TRS) 30°C, the piping unit 30 is Control to perform a warming operation on the compartment 2. As a result, the heating operation of the cabin 2 is started. (b) If the car 2 is heated and the detection temperature (TRM) of the first temperature detector TR reaches the first set temperature of 30°C, the control device 8 stops the heating operation, and the defrost end time (FES In the case of ), the first set temperature is maintained until the defrost retention time (FtS) is reached, and when the defrost retention time (FtS) is reached, output is output to the piping unit 30 to execute the cooling operation. (c) If the cabin 21 of the cabin 2 is cooled and the detection temperature (THM) of the second temperature detector TH reaches 3°C, the control device 8 stops the cooling operation and outputs to the piping unit 30 to perform heating Running. (d) The control device 8 outputs the piping unit 30 to repeat the heating operation, the first set temperature maintenance, and the cooling operation on the cabin 2 until the specified drying time (DTS) 1.5hr is reached, and when the specified drying time is reached (DTS) For 1.5 hours, the temperature adjustment operation is executed, and the detection temperature (TRM) of the first temperature detector TR is maintained at the first set temperature 5°C after the drying time is reached.

Because the installation position of the first temperature detector TR is installed at a position that detects the temperature of the air sucked into the indoor heat exchanger 6 from the cabin 21 of the cabin 2, the detected temperature is higher than the average temperature in the cabin temperature distribution of the cabin 2. Closer to the air temperature outside the car.

By setting the second set temperature to be lower than the first set temperature and higher than the temperature at which frost forms in the indoor heat exchanger 6, it is possible to efficiently dehumidify.

The first temperature detector TR may be substituted by a sensor that detects the representative temperature in the cabin when the temperature in the cabin 21 of the cabin 2 is controlled, and the second temperature detector TH may be substituted by a sensor that detects the end of defrosting. According to this configuration, it is possible to configure a refrigeration device that does not newly provide a temperature detector and can efficiently dry the inner wall surface of the vehicle cabin.

(2) Embodiment 2 A refrigerated vehicle 1A equipped with a refrigerating system according to Embodiment 2 of the present invention will be described with reference to the drawings. As shown in FIG. 8, the refrigerating vehicle 1A includes: compartments 2A1, 2A2, which are divided into two front and rear compartments by dividing the compartment 2A by a partition wall 20A, a compressor 3A constituting a refrigerating device, an external heat exchanger 4A, and an external blower 5A , Corresponding to the cabin 2A1, 2A2 indoor heat exchanger 6A1, 6A2, cabin air blower 7A1, 7A2, the first temperature detector TR1 that detects the air temperature in the cabin 2A1, the first temperature that detects the air temperature in the cabin 2A2 Detector TR2, a second temperature detector TH1 located near the indoor heat exchanger 6A1 in the cabin 2A1, a second temperature detector TH2 located near the indoor heat exchanger 6A2 in the cabin 2A2, a control device 8A, and a drain pan 9A1, 9A2, drain pipe 10A1, 10A2.

When cooling any one or both of the cabins 2A1 and 2A2, the control device 8A performs a cooling operation and controls the valve in the piping unit 30A to cool the interior of the cabin 2A1 or 2A2.

When heating one or both of the cabins 2A1 and 2A2, the control device 8A performs a heating operation and controls the valve in the piping unit 30A to heat the interior of the cabin 2A1 or 2A2.

When cooling one of the compartments 2A1 and 2A2 and heating the other compartment, the refrigerant discharged from the compressor flows through the piping unit 30A, the indoor heat exchanger of the compartment to be heated, and the The receiver (not shown) of the piping unit 30A, the expansion valve (not shown), and the interior heat exchanger of the cabin to be cooled perform cold heating operation, and use the outside heat exchange when the heat balance of the cabins 2A1 and 2A2 needs to be compensated.器4A.

The operating status based on the setting example is shown here. (Setting example: (1) During drying operation, the first set temperature (TRS, defrost set temperature) = 30°C, the second set temperature (THS, dehumidification set temperature) = 3°C, drying time (DTS) = 1.5hr , (2) The set temperature of the cabin 2A1 after the drying operation (temperature adjustment operation) = 5°C, and the set temperature of the cabin 2A2 20°C) When the compartments 2A1 and 2A2 are set to the first set temperature of -25°C and the cooling operation is performed, if the first set temperature TRS=30°C, the second set temperature THS=3°C, and the drying operation are input to the control device 8A Time DTS=1.5hr, the first set temperature of the cabin 2A1 after the completion of the drying operation is 5°C, the first set temperature of the cabin 2A2 is 20°C, and the instruction to start the drying operation is input to the control device 8A, then (a) control The device 8A compares the detected temperatures of the first temperature detectors TR1 and TR2 (TRM1, TRM2) -25°C and the first set temperature 30°C, because the detected temperatures (TRM1, TRM2) in the vehicle compartment -25°C are lower than the first temperature detectors TR1 and TR2. The set temperature is 30°C, so the piping unit 30A is controlled to perform a heating operation on the cars 2A1 and 2A2. Thereby, the heating operation of the compartments 2A1 and 2A2 is started. (b) If the compartments 2A1 and 2A2 are heated, and the detected temperatures (TRM1, TRM2) of the first temperature detectors TR1 and TR2 reach the first set temperature of 30°C, the control device 8A stops the heating operation, and the temperature is not reached. In the case of the defrost end time (FES), the first set temperature is maintained until the defrost retention time (FtS) is reached, and when the defrost retention time (FtS) is reached, the output is output to the piping unit 30A to execute the cooling operation. (c) If the cars 2A1 and 2A2 are cooled and the detected temperatures (THM1, THM2) of the second temperature detectors TH1 and TH2 reach 3°C, the control device 8A stops the cooling operation and outputs to the piping unit 30A to execute Warming operation. (d) The control device 8A outputs the piping unit 30A to repeat the heating operation, the first set temperature maintenance and the cooling operation for the compartments 2A1 and 2A2 until the specified drying time (DTS) 1.5hr is reached, and once the specified drying time (DTS) reaches 1.5hr. After the drying time (DTS) is 1.5hr, the temperature adjustment operation is executed to maintain the detected temperatures (TRM1, TRM2) of the first temperature detectors TR1 and TR2 at the first set temperature of the cabin 2A1 after the drying time is 5°C, and the cabin 2A2 The set temperature is 20°C.

Because the installation positions of the first temperature detectors TR1 and TR2 are installed to detect the temperature of the air sucked into the indoor heat exchangers 6A1 and 6A2 from the cabins 2A1 and 2A2, the detected temperatures are in the cabin temperature distribution of the cabins 2A1 and 2A2 , Which is closer than the average temperature to the air temperature outside the cabin.

By setting the second set temperature to be lower than the first set temperature and higher than the temperature at which frost is formed in the indoor heat exchangers 6A1 and 6A2, it is possible to efficiently dehumidify.

The first temperature detectors TR1 and TR2 can be replaced by sensors that detect the representative temperature in the cabin when controlling the temperature of the cabins 2A1 and 2A2, and the second temperature detectors TH1 and TH2 can be replaced by sensors that detect the end of defrosting. Alternatively, according to this configuration, it is possible to configure a refrigeration device in which a temperature detector is not newly installed, and the inner wall surface of the vehicle compartment can be dried efficiently.

[Symbol Description]

1,1A: Freezer truck; Freezer unit 2, 2A, 2A1,2A2: carriage 3,3A: Compressor 4,4A: External heat exchanger 5,5A: External blower 6, 6A, 6A1, 6A2: indoor heat exchanger 7,7A1,7A2: inside air blower 8, 8A: Control device 9, 9A1, 9A2: drain pan 10, 10A1, 10A2: drain pipe 20A: Partition wall 21: Inside the carriage 30, 30A: Piping unit 40: The inner wall of the carriage TR, TR1, TR2, TRS: 1st temperature detector TH, TH1, TH2, THS: 2nd temperature detector TRS: Defrost set temperature THS: Dehumidification set temperature FES: Defrost end time (set value) FtS: Defrost holding time (set value) DTS: Drying time (set value) TRM, TRM1, TRM2: the detection temperature of the first temperature detector TR THM, THM1, THM2: the detection temperature of the second temperature detector TH

Fig. 1 is a schematic view showing a refrigerating vehicle equipped with a refrigerating apparatus according to Embodiment 1 of the present invention. Fig. 2 is a block diagram showing the configuration of the refrigeration system according to the first embodiment of the present invention. Fig. 3 is a block diagram showing the periphery of the control device of the refrigeration system according to Embodiment 1 of the present invention. 4 is a flowchart showing processing executed by the control device according to Embodiment 1 of the present invention. 5 is a flowchart showing a power switch interruption process executed by the control device according to Embodiment 1 of the present invention. 6 is a flowchart showing an ignition key switch interruption process executed by the control device according to Embodiment 1 of the present invention. Fig. 7 is a conceptual diagram showing a change in the cabin temperature during drying performed by the control device according to the first embodiment of the present invention. Fig. 8 is a schematic diagram showing a refrigerating vehicle equipped with a refrigerating apparatus according to Embodiment 2 of the present invention. Fig. 9 is a block diagram showing the configuration of a refrigeration system according to Embodiment 2 of the present invention. Fig. 10 is a block diagram showing the periphery of the control device of the refrigeration system according to Embodiment 2 of the present invention.

1: Freezer car

2: carriage

3: Compressor

4: External heat exchanger

5: External blower

6: In-car heat exchanger

7: In-car blower

8: Control device

9: Drain pan

10: Drain pipe

21: Inside the carriage

40: The inner wall of the carriage

TR: 1st temperature detector

TH: 2nd temperature detector

Claims (9)

A refrigeration device capable of switching between a cooling operation for cooling the interior of a compartment framed in a vehicle and a warming operation for heating the interior of the vehicle, characterized by being provided with: Compressor, compressed refrigerant; External heat exchanger, heat exchange with the air outside the compartment; The outside air blower corresponds to the outside heat exchanger; In-compartment heat exchanger for heat exchange with the air in the aforementioned compartment; The inside air blower corresponds to the inside heat exchanger; The first temperature detector detects the air temperature in the aforementioned compartment; The second temperature detector is located at or near the aforementioned indoor heat exchanger; and The control device controls the switching of the aforementioned cooling operation and the aforementioned heating operation; And the aforementioned refrigeration device has the following functions: The function of the defrost mode is to execute the aforementioned cooling operation and/or the aforementioned heating operation until the defrost end time is reached, so that the detected temperature of the aforementioned first temperature detector is the first set temperature; The function of the dehumidification mode, executes the aforementioned cooling operation until one of the following times is reached first: the time until the detection temperature of the aforementioned second temperature detector reaches the second set temperature set below the aforementioned first set temperature, or the dehumidification end time ;and The function of the drying mode is to perform a drying operation until a predetermined drying time is reached, and the drying operation is to alternately repeat the defrosting mode and the dehumidifying mode. A refrigeration device that can switch between the following three types of operations performed on a compartment framed on a vehicle and divided into two parts: Cooling operation, cooling at least one part of the compartment; Warming operation, heating at least one part of the compartment; and Cold heating operation, cooling one of the compartments, and heating the other compartment; The aforementioned refrigeration device is characterized by: Compressor, compressed refrigerant; External heat exchanger, heat exchange with the air outside the compartment; The outside air blower corresponds to the aforementioned outside heat exchanger; and A control device that controls the switching of the aforementioned cooling operation, the aforementioned heating operation, and the aforementioned cold heating operation; In each of the aforementioned compartments, there are: (A) In-compartment heat exchanger to exchange heat with the air in the aforementioned compartment; (B) Air blower in the compartment, corresponding to the heat exchanger in the compartment; (C) The first temperature detector detects the air temperature in the aforementioned compartment; and (D) The second temperature detector is located at or near the aforementioned indoor heat exchanger; And the aforementioned refrigeration device has the following functions: The function of the defrost mode is to execute the aforementioned cooling operation and/or the aforementioned heating operation until the defrost end time is reached, so that the detected temperature of the aforementioned first temperature detector is the first set temperature; The function of the dehumidification mode, executes the aforementioned cooling operation until one of the following times is reached first: the time until the detection temperature of the aforementioned second temperature detector reaches the second set temperature set below the aforementioned first set temperature, or the dehumidification end time ;and The function of the drying mode is to perform a drying operation until a predetermined drying time is reached, and the drying operation is to alternately repeat the defrosting mode and the dehumidifying mode. Such as the refrigeration device of claim 1 or 2, which has the following function: when the drying operation reaches the drying time, it switches from the drying mode to the temperature adjustment mode, and performs the heating operation and/or the cooling operation to make the The temperature control operation is performed so that the detected temperature of the first temperature detector becomes the set temperature in the cabin. For example, the refrigeration device of any one of claims 1 to 3 has the following function: continuously or intermittently performing the operation of the aforementioned indoor air blower. For example, the refrigeration device of any one of claims 1 to 4, wherein the first temperature detector detects the temperature of the air flowing into the indoor heat exchanger, and the second temperature detector detects at least one of the following temperatures: That is, the temperature of the refrigerant piping through which the refrigerant that has passed through the indoor heat exchanger circulates, the temperature of the refrigerant piping inside the indoor heat exchanger, the fin temperature of the indoor heat exchanger, and the pressure of the refrigerant passing through the indoor heat exchanger are converted from it. The obtained saturation temperature is the refrigerant temperature obtained by measuring the temperature of the refrigerant in the refrigerant pipe. A method for operating a refrigerating device, wherein the refrigerating device can switch between a cooling operation for cooling the interior of a compartment framed in a vehicle and a warming operation for heating the interior of the vehicle, characterized in that the refrigerating device includes: Compressor, compressed refrigerant; External heat exchanger, heat exchange with the air outside the compartment; The outside air blower corresponds to the outside heat exchanger; In-compartment heat exchanger for heat exchange with the air in the aforementioned compartment; The inside air blower corresponds to the inside heat exchanger; The first temperature detector detects the air temperature in the aforementioned compartment; The second temperature detector is located at or near the aforementioned indoor heat exchanger; and The control device controls the switching of the aforementioned cooling operation and the aforementioned heating operation; And the operation method of the aforementioned refrigeration device includes the following steps: In the defrosting step, the cooling operation or the heating operation is performed until the defrosting end time is reached, so that the detected temperature of the first temperature detector is the first set temperature; In the dehumidification step, the cooling operation is performed until any one of the following times is reached first: that is, the time until the detection temperature of the second temperature detector reaches the second set temperature set to be lower than the first set temperature, or the dehumidification end time; and In the drying step, a drying operation is performed until the drying time is reached, and the drying operation is to alternately repeat the defrosting step and the dehumidifying step. A method for operating a refrigerating device. The aforementioned refrigerating device can switch between the following three types of operations performed on a compartment framed in a vehicle and divided into two parts: Cooling operation, cooling at least one part of the compartment; Warming operation, heating at least one part of the compartment; and Cold heating operation, cooling one of the compartments, and heating the other compartment; The operating method of the aforementioned refrigerating device is characterized in that the aforementioned refrigerating device includes: Compressor, compressed refrigerant; External heat exchanger, heat exchange with the air outside the compartment; The outside air blower corresponds to the aforementioned outside heat exchanger; and A control device that controls the switching of the aforementioned cooling operation, the aforementioned heating operation, and the aforementioned cold heating operation; In each of the aforementioned compartments, there are: (A) In-compartment heat exchanger to exchange heat with the air in the aforementioned compartment; (B) Air blower in the compartment, corresponding to the heat exchanger in the compartment; (C) The first temperature detector detects the air temperature in the aforementioned compartment; and (D) The second temperature detector is located at or near the aforementioned indoor heat exchanger; And the operation method of the aforementioned refrigeration device includes the following steps: In the defrosting step, the cooling operation or the heating operation is performed until the defrosting end time is reached, so that the detected temperature of the first temperature detector is the first set temperature; In the dehumidification step, the cooling operation is performed until any one of the following times is reached first: that is, the time until the detection temperature of the second temperature detector reaches the second set temperature set to be lower than the first set temperature, or the dehumidification end time; and In the drying step, a drying operation is performed until the drying time is reached, and the drying operation is to alternately repeat the defrosting step and the dehumidifying step. For example, the operation method of a refrigeration device of claim 6 or 7, which includes a temperature adjustment step, and when the drying step reaches the drying time, the drying step is changed to the temperature adjustment step, and the heating operation and/or the cooling are performed The temperature adjustment operation is performed so that the detected temperature of the first temperature detector becomes the set temperature in the cabin. For example, the operation method of the refrigerating device in any one of claims 6 to 8 has the following steps: continuously or intermittently performing the operation of the aforementioned indoor air blower.

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