Refrigeration apparatus

Abstract

Provided is a refrigeration apparatus capable of reducing power consumption during operation of a lock device. The refrigeration apparatus comprises: a lock device that electronically opens and closes a door that blocks a storage chamber; and a control unit that controls the lock device and a control target implement. The control unit stops the operation of the control target implement during operation of the lock device.

Description

Refrigeration equipment

[0001] The present disclosure relates to refrigeration devices.

[0002] Conventionally, there has been known a refrigeration unit having a box body with a storage compartment, in which a locking device is attached to a door that opens and closes the opening of the storage compartment (see, for example, Patent Document 1). Locking devices include manual types that are manually locked and unlocked by the user, and electronic types that are electronically locked and unlocked. Of these, electronic locking devices can be locked and unlocked by the user operating an operation panel or the like.

[0003] Electronic locking devices require a relatively large amount of power to operate, so refrigeration systems use AC / DC converters with a relatively large capacity to supply power, taking into consideration the total amount of power required by the refrigeration system when the locking device is operating.

[0004] Japanese Patent Application Laid-Open No. 2010-261303

[0005] Recently, for the purpose of reducing design costs, it has become desirable to make AC / DC converters common to a variety of devices.

[0006] When using a common AC / DC converter, it is necessary to be able to appropriately supply the necessary power to devices with low total power consumption as well as devices with high total power consumption, so it is generally considered to use a common large-capacity AC / DC converter.

[0007] However, using a common high-capacity AC / DC converter would result in excessive specifications for devices that can operate with low-capacity AC / DC converters. Also, because the size of an AC / DC converter is determined by its capacity, using a high-capacity AC / DC converter makes it difficult to miniaturize the device.

[0008] On the other hand, if a low-capacity AC / DC converter is used in common, devices with a large total amount of power will not be supplied with the power necessary for operation, and the devices will not be able to operate properly.

[0009] An object of the present disclosure is to provide a refrigeration device that can reduce power consumption when a lock device is activated.

[0010] The refrigeration device according to the present disclosure comprises a locking device that electronically opens and closes a door that closes a storage room, and a control unit that controls the locking device and controlled equipment, and the control unit stops the operation of the controlled equipment when the locking device is activated.

[0011] According to the present disclosure, it is possible to reduce power consumption when the lock device is activated.

[0012] Fig. 1 is a perspective view showing an example of the configuration of a refrigeration device according to the present embodiment. Fig. 2 is a schematic diagram showing an example of the configuration of a cooling device. Fig. 3 is a block diagram for explaining the power path of the refrigeration device according to the present embodiment. Fig. 4 is a flowchart showing an example of the flow of power supply control processing according to the present embodiment. Fig. 5 is a timing chart for explaining the power supply control processing by the control unit.

[0013] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. The present disclosure is not limited to the following embodiments, and various modifications are possible without departing from the spirit of the present disclosure. In addition, in each drawing, the same reference numerals are used to denote the same or equivalent parts, and this is common throughout the entire specification.

[0014] [Configuration of Refrigeration Device 1] Fig. 1 is a perspective view showing an example of the configuration of a refrigeration device 1 according to this embodiment. The refrigeration device 1 is, for example, an ultra-low temperature freezer. An ultra-low temperature freezer is one that cools the interior of a freezer to an ultra-low temperature (for example, about -80°C). The refrigeration device 1 may also be a medicine refrigerator, a blood refrigerator, or an incubator.

[0015] In the following, when describing the structure of the refrigeration device 1 and each component that constitutes the refrigeration device 1, the Cartesian coordinate system (X, Y, Z) shown in each figure may be used. The X direction corresponds to the front-to-rear direction of the refrigeration device. More specifically, the positive side of the X direction corresponds to the front side of the refrigeration device 1. The negative side of the X direction corresponds to the rear side of the refrigeration device 1.

[0016] Furthermore, the Y direction coincides with the left-right direction and width direction of the refrigeration device 1. More specifically, the + side of the Y direction coincides with the left side when viewing the refrigeration device 1 from the front. The - side of the Y direction coincides with the right side when viewing the refrigeration device 1 from the front. The Z direction coincides with the up-down direction of the refrigeration device 1. More specifically, the + side of the Z direction coincides with the top side of the refrigeration device 1. The - side of the Z direction coincides with the bottom side of the refrigeration device 1.

[0017] As shown in FIG. 1, the refrigeration device 1 includes a main body 2 and a machine housing section 3 provided below the main body 2.

[0018] (Main Body 2) The main body 2 has a box 21, a door 22, and a handle 23.

[0019] The box 21 is formed of, for example, a metal plate and / or a rigid resin plate. The box 21 is configured as a box-shaped member that forms a storage chamber (not shown) with an open front. The box 21 may have a double structure configured of an inner box and an outer box that covers the inner box.

[0020] The door 22 is provided at the opening of the storage chamber of the box body 21 and opens and closes the opening. In this example, the door 22 is connected to the box body 21 via a hinge (not shown) located on the right side. That is, the door 22 is a right-opening door. The door 22 also has an operation display panel 24 that enables the user to operate the refrigeration apparatus 1. The door 22 also has a negative pressure port (not shown). The negative pressure port is provided to release negative pressure that occurs due to the difference between the outside air pressure and the pressure inside the storage chamber.

[0021] The handle 23 is attached, for example, to the left side surface of the door 22. The handle 23 is a component for facilitating opening and closing of the door 22, and is operated by the user when opening or closing the door 22. When the handle 23 is operated when the door 22 is in a closed state, it restricts and allows the door 22 to change from the closed state to the open state. The handle 23 includes a grip portion 230 that is gripped by the user when operating the handle 23.

[0022] The locking device 10 (see FIG. 3) is housed inside the handle 23. The locking device 10 restricts and allows the operation of the handle 23. The operation of the handle 23 restricted and allowed by the locking device 10 is the operation of the user moving the grip portion 230 from the closed position to the open position.

[0023] When the locking device 10 is locked, operation of the handle 23 is restricted. That is, when the locking device 10 is locked, the user cannot move the grip 230 from the closed position to the open position. On the other hand, when the locking device 10 is unlocked, operation of the handle 23 is permitted. That is, when the locking device 10 is unlocked, the user can move the grip 230 from the closed position to the open position.

[0024] Generally, there are two types of locking devices: manual locking devices that are manually locked and unlocked by the user, and electronic locking devices that are electronically locked and unlocked. The handle 23 accommodates a locking device that corresponds to either or both of these types. The handle 23 according to this embodiment accommodates at least an electronic locking device. The following description will be given taking the case where the locking device 10 is an electronic type as an example.

[0025] The locking device 10 according to this embodiment has an electromagnetic actuator using a self-holding solenoid, and locks or unlocks the door in response to a user's operation on an operation display panel 24, which will be described later.

[0026] The operation display panel 24 is configured, for example, by a liquid crystal display (LCD) with a touch panel, and functions as a display unit and an operation unit. When functioning as a display unit, the operation display panel 24 displays various operation screens, image status displays, and the operating status of each function. When functioning as an operation unit, the operation display panel 24 has various operation keys, accepts various input operations by the user, and outputs operation signals to the control unit 7, which will be described later.

[0027] In this embodiment, the operation display panel 24 is an example of an operation display unit, and when a user performs an operation to lock or unlock the locking device 10, it outputs an electronic lock operation command to the control unit 7 indicating instructions corresponding to the operation.

[0028] (Machinery housing section 3) The machinery housing section 3 is disposed, for example, directly below the main body section 2. Some of the multiple elements constituting the cooling device 4 (see FIG. 2 ), which will be described later, are disposed in the machinery housing section 3. Specifically, of the multiple elements constituting the cooling device 4, for example, a left compressor 500, a left pressure reducer 502, a right compressor 600, and a right pressure reducer 602, which will be described later, are disposed in the machinery housing section 3.

[0029] (Cooling device 4) Fig. 2 is a schematic diagram showing an example of the configuration of the cooling device 4. The cooling device 4 is composed of multiple elements that are capable of cooling the storage chamber to a predetermined temperature below -80°C, for example. As shown in Fig. 2, in this embodiment, the cooling device 4 has a left cooling device 5, a right cooling device 6, a control unit 7, and an anti-freeze heater 8. The left cooling device 5 and the right cooling device 6 are independent cooling devices.

[0030] The left cooling device 5 cools the storage compartment and includes a left refrigeration circuit 50, a left blower 51, and a left heater 52.

[0031] The left refrigeration circuit 50 generates air for cooling the storage compartment and includes a left compressor 500, a left condenser 501, a left pressure reducer 502, and a left evaporator 503.

[0032] The elements constituting the left refrigeration circuit 50 are connected to each other by piping through which the refrigerant circulates. The refrigerant in the piping changes state and flows through the left refrigeration circuit 50 as indicated by arrow A in FIG. １ The storage chamber is cooled by circulating in the direction indicated by .

[0033] The left compressor 500 operates under the control of the control unit 7, which will be described later, to draw in the refrigerant circulating in the piping, compress the drawn refrigerant, and discharge it. The refrigerant (also referred to as the first refrigerant) discharged from the left compressor 500 passes through each element constituting the left refrigeration circuit 50, and returns to the left compressor 500. In the left refrigeration circuit 50, the first refrigerant is discharged in the direction indicated by arrow A in FIG. １ It flows in the direction indicated.

[0034] The left condenser 501 exchanges heat between the first refrigerant and the air supplied by the left blower 51, and dissipates the heat of the first refrigerant to the supplied air, thereby condensing the refrigerant.

[0035] The left pressure reducer 502 reduces the pressure of the first refrigerant to expand it. The left pressure reducer 502 is configured with, for example, a capillary tube or a valve whose opening degree can be controlled, such as an electronic expansion valve. When the left pressure reducer 502 is configured with an electronic expansion valve, the opening degree of the left pressure reducer 502 is controlled by the control unit 7.

[0036] The left evaporator 503 exchanges heat between the air in contact with the left evaporator 503 and the first refrigerant, evaporating the first refrigerant and cooling the air. The cooled air (cold air) is blown into the storage chamber by a blower (not shown) disposed inside the storage chamber. As a result, the storage chamber is cooled.

[0037] The left-side blower 51 supplies air to the left-side condenser 501. The left-side blower 51 is, for example, a fan that can change the amount of air blown depending on the rotation speed, and a plurality of left-side blowers 51 (for example, three) are provided. The driving and stopping of the left-side blowers 51, as well as the rotation speed, are controlled by the control unit 7.

[0038] The left-side blower 51 is not limited to this example, and may be configured to supply air to the left-side compressor 500 so as to cool the left-side compressor 500. Depending on the arrangement of the elements of the left-side refrigeration circuit 50 in the machinery housing section 3, the left-side blower 51 may be configured to supply air to both the left-side compressor 500 and the left-side condenser 501.

[0039] The left heater 52 is disposed around the left evaporator 503. The left heater 52 is driven during defrosting control to remove frost from the left evaporator 503. The control unit 7 controls whether the left heater 52 is driven or stopped.

[0040] The right cooling device 6 cools the storage compartment and includes a right refrigeration circuit 60, a right blower 61, and a right heater 62.

[0041] The right-side refrigeration circuit 60 generates air for cooling the storage compartment. The right-side refrigeration circuit 60 has a right-side compressor 600, a right-side condenser 601, a right-side pressure reducer 602, and a right-side evaporator 603. The right-side refrigeration circuit 60 has the same configuration (in other words, the same cooling performance) as the left-side refrigeration circuit 50. The right-side refrigeration circuit 60 is a separate refrigeration circuit from the left-side refrigeration circuit 50.

[0042] The elements constituting the right refrigeration circuit 60 are connected to each other by piping through which the refrigerant circulates. The refrigerant in the piping changes state and flows through the right refrigeration circuit 60 as indicated by arrow A in FIG. ２ The storage chamber is cooled by circulating in the direction indicated by .

[0043] The right compressor 600 operates under the control of the control unit 7, which will be described later, to draw in the refrigerant circulating in the piping, compress the drawn refrigerant, and discharge it. The refrigerant (also referred to as the second refrigerant) discharged from the right compressor 600 passes through each element constituting the right refrigeration circuit 60 and returns to the right compressor 600. In the right refrigeration circuit 60, the second refrigerant is supplied to the right compressor 600 in the direction indicated by arrow A in FIG. 2. ２ It flows in the direction indicated.

[0044] The right condenser 601 exchanges heat between the second refrigerant and the air supplied by the right blower 61, and radiates heat from the second refrigerant to the supplied air, thereby condensing the second refrigerant.

[0045] The right-side pressure reducer 602 reduces the pressure of the second refrigerant to expand it. The right-side pressure reducer 602 is configured with, for example, a capillary tube or a valve whose opening degree can be controlled, such as an electronic expansion valve. When the right-side pressure reducer 602 is configured with an electronic expansion valve, the opening degree of the right-side pressure reducer 602 is controlled by the control unit 7.

[0046] The right-side evaporator 603 exchanges heat between the air in contact with the right-side evaporator 603 and the second refrigerant, evaporating the second refrigerant and cooling the air. The cooled air (cold air) is blown into the storage chamber by a blower (not shown) located inside the storage chamber. As a result, the storage chamber is cooled.

[0047] The right-side blower 61 supplies air to the right-side condenser 601. The right-side blower 61 is, for example, a fan that can change the amount of air blown depending on the rotation speed, and multiple right-side blowers 61 (for example, three) are provided. The control unit 7 controls the driving and stopping of the right-side blowers 61 and the rotation speed.

[0048] The right-side blower 61 is not limited to this example, and may be configured to supply air to the right-side compressor 600 so as to cool the right-side compressor 600. Furthermore, depending on the arrangement of the elements of the right-side refrigeration circuit 60 in the machinery housing section 3, the right-side blower 61 may be configured to supply air to both the right-side compressor 600 and the right-side condenser 601.

[0049] The right heater 62 is disposed around the right evaporator 603. The right heater 62 is driven during defrosting control to remove frost from the right evaporator 603. The control unit 7 controls the driving and stopping of the right heater 62.

[0050] The anti-freeze heater 8 is disposed around the negative pressure port disposed in the door 22. The anti-freeze heater 8 heats the negative pressure port to prevent the negative pressure port from freezing. The control unit 7 controls the driving and stopping of the anti-freeze heater 8.

[0051] The control unit 7 controls the entire refrigeration apparatus 1. In particular, in this embodiment, the control unit 7 performs a power supply control process to stop the operation of controlled devices including the left blower 51 and the right blower 61 when operating the lock device 10. The power supply control process will be described in detail later.

[0052] The controlled devices are devices that operate when supplied with power. In the present embodiment, the controlled devices include, for example, the left compressor 500, the left blower 51, the left heater 52, the right compressor 600, the right blower 61, the right heater 62, and the antifreeze heater 8. The left heater 52, the right heater 62, and the antifreeze heater 8 correspond to the "heater" in this disclosure, and in the following description, they may be collectively referred to simply as the "heater." In this case, the heater heats a predetermined portion of the refrigeration device 1.

[0053] The control unit 7 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), etc. (none of which are shown). The CPU reads a program corresponding to the processing content from the ROM, loads it into the RAM, and works with the loaded program to centrally control the operation of the refrigeration device 1. The control unit 7 is disposed in the machine storage unit 3, for example.

[0054] In this example, the cooling device 4 has been described as having two cooling devices (left cooling device 5 and right cooling device 6), but is not limited to this configuration. For example, the cooling device 4 may be configured with one cooling device or three or more cooling devices. Furthermore, the cooling device 4 may be configured with a dual cascade refrigeration circuit in which a condenser or an evaporator heat exchanger is shared between two independent refrigeration circuits.

[0055] Furthermore, in some refrigeration devices 1, defrost control is not required for the left evaporator 503 and the right evaporator 603 in the left refrigeration circuit 50 and the right refrigeration circuit 60. In such cases, the left cooling device 5 and the right cooling device 6 may not be provided with the left heater 52 and the right heater 62, respectively.

[0056] Next, the power paths to each part of the refrigeration system 1 according to this embodiment will be described. Fig. 3 is a block diagram for explaining the power paths of the refrigeration system 1 according to this embodiment. As shown in Fig. 3, the refrigeration system 1 includes an AC / DC converter 70 connected to an external power supply 100. The power supply 100 is also connected to the cooling device 4.

[0057] AC / DC converter 70 is an example of a power supply unit, and is connected to external power supply 100 and control unit 7. AC / DC converter 70 converts AC power supplied from power supply 100 into predetermined DC power and outputs it to control unit 7. In this embodiment, AC / DC converter 70 has a capacity smaller than the total amount of power required when all of the controlled devices are operated.

[0058] The control unit 7 is connected to various devices that require power to operate in the refrigeration device 1. The control unit 7 converts the DC power converted by the AC / DC converter 70 into predetermined DC power required for the operation of the various devices and outputs the converted power.

[0059] In this example, the control unit 7 is connected to the left blower 51, the right blower 61, the locking device 10, and the heater 80. Here, the heater 80 is a collective term for the left heater 52, the right heater 62, and the antifreeze heater 8. The control unit 7 converts the DC power supplied from the AC / DC converter 70 into DC power required for the operation of the left blower 51, the right blower 61, the locking device 10, and the heater 80, and outputs the converted power. Note that the heater 80 is not limited to this example, and may be supplied with power directly from an external power source 100.

[0060] In this example, the refrigeration device 1 is described as including an AC / DC converter 70 that converts AC power supplied from an external source into DC power, but this is not limiting, and for example, the refrigeration device 1 may be directly supplied with DC power from an external source. In this case, the refrigeration device 1 does not need to be equipped with the AC / DC converter 70.

[0061] Furthermore, the refrigeration device 1 may include a DC / DC converter that converts externally supplied DC power into predetermined DC power. In this case, the DC / DC converter corresponds to an example of a power supply unit.

[0062] [Power Supply Control Process] Next, a description will be given of the power supply control process in the refrigeration system 1 having the above configuration. Generally, when an electronic locking device is operated, a relatively large amount of power needs to be supplied to the locking device. Therefore, a relatively large capacity AC / DC converter is used in the refrigeration system, taking into consideration the total amount of power required in the refrigeration system when the locking device is operated.

[0063] On the other hand, recently, for the purpose of reducing design costs, it has become desirable to make AC / DC converters common to a variety of devices.

[0064] However, as mentioned above, refrigeration systems equipped with electronic locking devices require a relatively large-capacity AC / DC converter. Therefore, if such a large-capacity AC / DC converter were used for all systems, it would be excessively large for devices that can operate with a low-capacity AC / DC converter. Furthermore, since the size of an AC / DC converter is determined by its capacity, using a large-capacity AC / DC converter makes it difficult to miniaturize the system.

[0065] Therefore, in this embodiment, even when a relatively low-capacity AC / DC converter is used, a power supply control process is performed to supply power to each component so that power can be appropriately supplied to each component within the device without exceeding the capacity of the AC / DC converter. Specifically, in the refrigeration device 1 according to this embodiment, when the electronic lock device 10 is activated, the power supply to the left blower 51 and the right blower 61 is temporarily stopped.

[0066] 4 is a flowchart showing an example of the flow of a power supply control process according to this embodiment. In the following description, the left-side fan 51 and the right-side fan 61 may be simply referred to as the "fans" unless there is a need to distinguish between them.

[0067] First, when the user operates the operation display panel 24 to lock or unlock the lock device 10, an electronic lock activation command is output from the operation display panel 24. At this time, in step S1, the control unit 7 acquires the electronic lock activation command output from the operation display panel 24.

[0068] When the control unit 7 receives the electronic lock activation command, in step S2, it stops the supply of power to the left-side fan 51 and the right-side fan 61. At this time, the control unit 7 may stop the supply of power to all of the left-side fan 51 and the right-side fan 61, or may stop the supply of power to some of the left-side fan 51 and the right-side fan 61. The number of fans to be stopped is set in advance.

[0069] Next, in step S3, the control unit 7 waits for a predetermined time (for example, about 20 msec) after stopping the power supply to the blower. This is because, due to the characteristics of the elements used in the blower control circuit in the control unit 7, it is necessary to take into account the time from when the control unit 7 outputs a power stop instruction to the blower until the power is actually input to the blower.

[0070] After the waiting time in step S3 has elapsed, in step S4, the control unit 7 starts supplying power to the lock device 10. This causes the lock device 10 to operate based on the electronic lock operation command, and lock or unlock the door.

[0071] When the time required for the locking device 10 to lock or unlock has elapsed, the control unit 7 stops the power supply to the locking device 10 in step S5.

[0072] Next, in step S6, the control unit 7 performs back electromotive force suppression control. Back electromotive force suppression control is a control for suppressing back electromotive force generated when the drive circuit using an inductive load such as a coil is stopped. Back electromotive force is generated as a large surge voltage instantaneously when the power supply to the lock device 10 is stopped.

[0073] When the back electromotive force suppression control is completed, the control unit 7 waits for a predetermined time in step S7, similar to step S3. After the waiting time in step S7 has elapsed, the control unit 7 resumes the supply of power to the left fan 51 and the right fan 61 in step S8.

[0074] 5 is a timing chart for explaining the power supply control process by the control unit 7. Here, the state of power (voltage) supply to the blower and the lock device 10 during the power supply control process is shown.

[0075] First, in the refrigeration apparatus 1, it is assumed that power of voltage V1 is supplied to the blower until an electronic lock activation command is output from the operation display panel 24. At the time T １ At time T １ Time T when a predetermined time (standby time) has elapsed since ２ In this state, power of voltage V2 is supplied to the lock device 10 under the control of the control unit 7.

[0076] Next, at the time T ３ At time T, the power supply to the lock device 10 is stopped and the back electromotive force suppression control is performed. ４ Time T when a predetermined time (standby time) has elapsed since ５ At this time, the power supply to the blower is resumed under the control of the control unit 7 .

[0077] As described above, in the refrigeration system 1 according to the present embodiment, when the locking device 10 is activated, the power supply to the left-side blower 51 and the right-side blower 61 is stopped, and the operation of the left-side blower 51 and the right-side blower 61 is stopped. This reduces the total amount of power consumed by the entire system when the locking device 10 is activated, thereby reducing the power consumption when the locking device is activated. As a result, the capacity of the AC / DC converter 70 can be reduced, allowing the AC / DC converter 70 to be made smaller.

[0078] Furthermore, because the AC / DC converter 70 used in the refrigeration device 1 can be made smaller, the AC / DC converter 70 can be used in devices that are smaller in size than the refrigeration device 1. In other words, the AC / DC converter can be used in a variety of devices in common.

[0079] Although the present embodiment has been described above, the present disclosure is not limited to the above embodiment, and various modifications and applications are possible within the scope of the present disclosure. For example, during the power supply control process, instead of the left fan 51 and the right fan 61, the drive of other control target devices such as the left heater 52 and the right heater 62 may be stopped.

[0080] Furthermore, during the power supply control process, even if the left-side fan 51 and the right-side fan 61 are stopped, if the amount of power exceeds the capacity of the AC / DC converter 70, various heaters, such as the antifreeze heater 8, the left-side heater 52, and the right-side heater 62, in addition to the left-side fan 51 and the right-side fan 61, may also be stopped.

[0081] The disclosures of the specification, drawings and abstract contained in Japanese Patent Application No. 2024-033001, filed March 5, 2024, are incorporated herein by reference in their entirety.

[0082] The refrigeration device according to the present disclosure can be applied to various refrigeration devices.

[0083] REFRIGERATION SYSTEM 1 Refrigeration unit 2 Main body 3 Machine storage section 4 Cooling unit 5 Left cooling unit 6 Right cooling unit 7 Control unit 8 Anti-freeze heater 10 Locking device 21 Box 22 Door 23 Handle 24 Operation display panel 50 Left refrigeration circuit 51 Left blower 52 Left heater 60 Right refrigeration circuit 61 Right blower 62 Right heater 70 AC / DC converter 80 Heater 100 Power supply 230 Grip 500 Left compressor 501 Left condenser 502 Left pressure reducer 503 Left evaporator 600 Right compressor 601 Right condenser 602 Right pressure reducer 603 Right evaporator

Claims

1. A refrigeration system comprising: a locking device that electronically opens and closes a door that closes a storage room; and a control unit that controls the locking device and controlled equipment, wherein the control unit stops the operation of the controlled equipment when the locking device is activated.

2. A refrigeration device as described in claim 1, further comprising an operation display unit that outputs an electronic lock activation command based on operation input by a user, and the control unit controls the controlled equipment to stop operation when the electronic lock activation command is obtained.

3. The refrigeration device according to claim 1, wherein the controlled equipment includes a blower that blows air into a refrigeration circuit that generates air for cooling the storage room, and the control unit stops operation of the blower when the locking device is activated.

4. The refrigeration system according to claim 3, further comprising a condenser that performs heat exchange between air and a refrigerant, and the blower supplies air to the condenser.

5. The refrigeration device according to claim 3, further comprising a compressor that compresses a refrigerant, and the blower supplies air to the compressor.

6. The refrigeration device according to claim 1, further comprising a heater for heating a predetermined portion, wherein the control unit stops operation of the heater when the locking device is activated.

7. A refrigeration device as described in claim 1, further comprising a power supply unit that supplies power to each of the locking device and the controlled equipment, and wherein the control unit stops the power supply unit from supplying power to the controlled equipment when the locking device is activated.

8. The refrigeration apparatus according to claim 7, wherein the power supply unit has a capacity smaller than the total amount of power required when all of the controlled devices are operated.

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