JP2015135923A - Temperature adjustment device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to preferably execute prescribed cold time processing while reducing a manufacturing cost.SOLUTION: A temperature adjustment device having a configuration capable of executing temperature adjustment processing of adjusting a temperature of a supply target by supplying a heat medium liquid whose temperature is adjusted by a thermoregulator to the supply target by using pressure-feeding force of a pump comprises: a fan arranged so as to be capable of cooling a condenser by air newly introduced inside a frame by discharging air inside the frame from an outlet provided on a top plate of the frame; and a control unit for executing, as cold time processing, snow coverage prevention processing 40 for rotating the fan to prevent snow coverage on the top plate after determining that a cold time processing start condition is satisfied when refrigerant pressure in refrigerant piping for mutually connecting the condenser and a compressor, in a state of not executing the temperature adjustment processing, becomes equal to or lower than prescribed pressure (step 22), and freezing prevention processing 50 for preventing freezing of the heat medium liquid by rotating the pump to press and feed the heat medium liquid.

Description

  The present invention relates to a temperature adjustment device configured to be able to adjust the temperature of a supply object by supplying a heat medium liquid whose temperature has been adjusted by a temperature regulator to the supply object.

  As this type of temperature adjusting device, the applicant discloses a cooling device configured to supply a cooling liquid to an object to be cooled such as a machine tool so that the object to be cooled can be cooled. The cooling device includes a water tank capable of storing a cooling liquid, a pressure feeding pump that pumps the cooling liquid, a refrigeration cycle that cools the cooling liquid, and a power supply unit that supplies power to the pressure feeding pump and the refrigeration cycle, and a cooling apparatus The switchboard is provided with a control section for controlling each of these components, and these are housed in the apparatus casing and formed in a rectangular parallelepiped shape as a whole. Further, in this cooling device, a blower fan for cooling the condenser is housed in the device casing together with the condenser, and new air is discharged from the device case by discharging the air in the device case out of the device case by the blower fan. The structure which introduce | transduces into a body and cools a condenser is employ | adopted.

  In this case, in this cooling device, the internal space of the device housing is partitioned vertically by the horizontal partition plate. In the lower compartment, a refrigeration cycle cooler (evaporator), a compressor, a pressure feed pump, a water tank, and the like are installed. Furthermore, in the upper section, a section in which a switchboard is disposed and a section in which a condenser, a blower fan, and the like are accommodated are provided. In addition, the top plate (ceiling surface: ceiling plate) of the device housing is provided with an air outlet for discharging the air inside the device housing (in the upper compartment) by air blowing by a blower fan, and the front plate ( The front surface (front plate) is provided with an air inlet for introducing new air into the apparatus housing (in the upper compartment) and supplying it to the condenser. As a result, in this cooling device, an L-shaped condenser cooling air flow path is formed from the air inlet port to the air outlet port as viewed from the left side.

  When cooling the object to be cooled by the cooling device, a high-temperature and high-pressure refrigerant compressed by the compressor is condensed in the condenser by operating the refrigeration cycle, and then passes through the expansion valve to cool the evaporator (evaporator). Thus, the coolant is cooled by heat exchange between the coolant in the cooler and the coolant. At this time, the air in the apparatus housing is discharged from the air outlet by blowing air from the blower fan, and new air is introduced into the apparatus casing from the air inlet, and the condenser is cooled by the introduced air. Condensation of the refrigerant in the condenser is promoted.

  In this case, as described above, in the cooling device disclosed by the applicant, the air outlet for discharging the air in the device housing is provided on the top plate of the device housing. Therefore, it is possible to smoothly discharge high-temperature air whose temperature has risen due to cooling of the condenser or the like (air that generates a force that tends to rise due to a higher temperature than the surrounding air) out of the apparatus housing. It is possible. Moreover, the cooling liquid cooled in the cooler is supplied to the object to be cooled by operating the pressure pump in parallel with the cooling process of the cooling liquid by the refrigeration cycle. Thus, the object to be cooled is cooled by heat exchange with the low-temperature coolant.

Japanese Patent Laying-Open No. 2010-29974 (page 5-7, FIG. 1-3)

  However, the cooling device disclosed by the applicant in Patent Document 1 has the following problems to be improved. That is, in the cooling device disclosed by the applicant, an air outlet is provided on the top plate of the device housing in order to smoothly discharge the air in the device housing whose temperature has risen due to cooling of the condenser.

  In this case, this type of device may be installed outdoors, and when installed outdoors in a snowfall area, snow accumulation may occur on the housing when the cooling process of the object to be cooled is not performed. is there. In such a state, since the air outlet is blocked by snow accumulation, the air in the device casing cannot be discharged when the cooling process of the object to be cooled is started, and new air is not discharged into the device casing. It may be difficult to sufficiently cool the condenser because it cannot be introduced into the condenser. In addition, when industrial distilled water or tap water is used as the coolant, the coolant in the aquarium or piping freezes regardless of the installation location during the winter period when the ambient temperature is below freezing. There is a fear.

  Therefore, the applicant has developed a cooling device that can be operated in a snow accumulation freezing prevention mode that prevents snow from being produced or cooling fluid from freezing when the cooling process of the object to be cooled is not performed. Yes. Specifically, in the cooling device developed by the applicant, it is set to execute the operation in the snow freezing prevention mode, so that when the cooling process is not executed, every predetermined time. The blower fan and the pressure pump are operated for a very short time, and the air in the device casing is discharged from the air outlets to prevent snow accumulation on the top plate of the device casing, and the coolant in the water tank and piping is removed. A configuration is employed in which the coolant is circulated to prevent the coolant from freezing. By adopting such a configuration, it is suitable for objects to be cooled when moving from the operation in the snow freezing prevention mode to the cooling processing mode, even outdoors in snowy areas or in an environment where the ambient temperature is below freezing. It becomes possible to cool it.

  However, when the cooling device developed by the applicant is set to execute the operation in the snow freezing prevention mode even in an environment where there is no risk of snow accumulation or freezing of the coolant. When the cooling process is not being performed, the blower fan and the pressure feed pump are operated every predetermined time. For this reason, for example, when the spring season has come to be set to execute the operation in the snow freezing prevention mode in the winter period, and forgetting to set the operation in the snow freezing prevention mode not to be executed, etc. When the cooling process is not being executed, the operation in the snow freezing prevention mode is executed, and the blower fan and the pressure pump are operated unnecessarily. As a result, unnecessary energy may be consumed when the cooling process is not performed.

  Therefore, the applicant arranges a temperature sensor (outside air temperature sensor) for detecting the temperature outside the housing, and the temperature (outside air temperature) detected by the temperature sensor when the cooling process is not executed is preset. The cooling system has been improved so that the operation in the snow freezing prevention mode is automatically executed when the temperature falls below the specified temperature. As a result, since the operation in the snow freezing prevention mode is not executed in an environment where there is no possibility of snow accumulation or cooling liquid freezing, it is possible to avoid the consumption of energy unnecessary for the blower fan and the pressure pump.

  However, in the cooling device improved by the applicant, due to the fact that the temperature sensor is arranged outside the device housing only to determine whether or not to perform the operation in the snow freeze prevention mode, It is difficult to reduce manufacturing costs. In particular, when used in an environment where there is no risk of freezing snow or cooling fluid throughout the year (for example, in a warm area), it is not necessary to operate in the snow freezing prevention mode. There is a current situation in which a temperature sensor disposed for determining whether or not to perform a proper operation is wasted. For this reason, it is preferable to improve this point.

  The present invention has been made in view of such problems to be improved, and it is a main object of the present invention to provide a temperature adjustment device capable of suitably executing a predetermined cold / cold treatment while reducing the manufacturing cost. And

  In order to achieve the above-mentioned object, the temperature adjusting device according to claim 1 is configured such that a pump for pumping the heat medium liquid to a supply target and a temperature for adjusting the temperature of the heat medium liquid configured to be able to pass the heat medium liquid. A refrigeration cycle having a regulator, a compressor, a condenser, an expansion valve, an evaporator and a fan, the evaporator being configured in the temperature regulator, and the compressor and the condenser in the refrigeration cycle. A pressure sensor for detecting a refrigerant pressure in the refrigerant pipes connected to each other and outputting a first sensor signal; and controlling the fan according to the refrigerant pressure specified based on the first sensor signal, The amount of air passing through the condenser is adjusted to adjust the amount of refrigerant condensed in the condenser, and a controller that controls the pump to pump the heat transfer fluid is housed in the housing, By temperature regulator A temperature adjustment device configured to perform a temperature adjustment process for adjusting the temperature of the supply target by supplying the heat medium liquid adjusted in temperature to the supply target by the pumping force of the pump, The plate is provided with a discharge port through which the air in the housing can be discharged by the fan, and the fan newly introduces air into the housing by discharging the air in the housing from the discharge port. The condenser is arranged so that it can be cooled, and the control unit determines that the refrigerant pressure specified based on the first sensor signal in a state where the temperature adjustment process is not performed is equal to or lower than a predetermined pressure. When the cold start process start condition is satisfied, the fan is rotated to prevent snow accumulation on the top plate, and the pump is rotated to pump the heat transfer liquid. At least one of the freeze prevention processing for preventing the freezing of the heat transfer fluid to run as Hiyasamu time processing in the.

  The temperature adjustment device according to claim 2 is the temperature adjustment device according to claim 1, wherein the control unit performs the snow accumulation prevention process and the freeze prevention process when the cold start treatment start condition is satisfied. Both are executed as the cold process.

  Furthermore, the temperature adjusting device according to claim 3 is the temperature adjusting device according to claim 1 or 2, further comprising a temperature sensor that detects a temperature in the housing and outputs a second sensor signal, and the control unit includes: The temperature specified in advance when the temperature rise processing start condition is met such that the temperature specified based on the second sensor signal is equal to or higher than the first temperature specified in advance during execution of the temperature adjustment processing. When the temperature inside the casing specified based on the second sensor signal is equal to or lower than the second temperature specified in advance in a state where the temperature adjustment process is not executed while the temperature adjustment process is not executed The cold time processing is executed on the assumption that the cold time processing start condition is satisfied.

  According to a fourth aspect of the present invention, there is provided the temperature adjusting device according to the third aspect, wherein the temperature sensor is disposed on the switchboard so as to detect the temperature of the switchboard disposed in the housing. .

  Furthermore, the temperature adjustment device according to claim 5 is the temperature adjustment device according to any one of claims 1 to 4, wherein the control unit does not execute the temperature adjustment processing for a predetermined time. In the state, when the cold start process start condition is satisfied, a lubrication process for operating the compressor and supplying lubricating oil to the movable part of the compressor is at least one of the snow accumulation prevention process and the freeze prevention process At the same time, the process is executed as the cold process.

  In the temperature adjustment device according to claim 1, when the refrigerant pressure specified based on the first sensor signal is equal to or lower than a predetermined pressure in a state where the control unit is not executing the temperature adjustment process, If the cold processing start condition is satisfied, at least one of the snow accumulation prevention processing and the freeze prevention processing is executed as the cold processing. In the temperature control apparatus according to claim 2, when the cold start process start condition is satisfied, both the snow cover prevention process and the freeze prevention process are executed as the cold process.

  Therefore, according to the temperature adjustment device of claim 1 or 2, compared with a configuration provided with a dedicated temperature sensor or the like for determining whether or not to execute snow accumulation prevention processing or anti-freezing processing, the supply target A pressure sensor necessary for specifying the operating state of the refrigeration cycle in order to supply the heat transfer fluid at the set temperature to the supply target during the cooling process for cooling the object, and snow accumulation based on the first sensor signal By adopting a configuration that determines the necessity of execution of prevention processing and anti-freezing processing, etc., it is possible to accurately execute snow accumulation prevention processing and anti-freezing processing when the outside air temperature is low without causing an increase in manufacturing cost. The occurrence of snow accumulation and freezing can be preferably avoided. In addition, the outside air temperature is low by determining whether or not the snow accumulation prevention process or the freeze prevention process is necessary based on the refrigerant pressure in the vicinity of the condenser that is brought into contact with the outside air and can be changed to a temperature similar to the outside air temperature. Sometimes, it is possible to reliably execute the snow cover prevention process and the freeze prevention process, thereby reliably preventing the occurrence of snow cover and freezing.

  Furthermore, according to the temperature adjusting device of the third aspect, the control unit determines the temperature inside the housing specified based on the second sensor signal in a state where the temperature adjusting process is not being executed. When the cold start processing condition is satisfied when the temperature is lower than the temperature, by performing the cold processing, when the outside air temperature is low, the temperature in the housing drops in a relatively short time. The refrigerant temperature between the compressor and the condenser is high due to the fact that the refrigeration cycle was operated in a high load state just before the end of the cooling process, so that it takes some time for the refrigerant pressure to drop. Even in such a state, it is possible to reliably execute the snow accumulation prevention process and the freeze prevention process in accordance with the temperature drop in the casing, and thus it is possible to more reliably avoid the occurrence of snow accumulation and freezing.

  In addition, according to the temperature adjustment device of the fourth aspect, by adopting a configuration that uses the temperature sensor disposed in the switchboard so that the temperature of the switchboard disposed in the housing can be detected, various power supply units, A temperature sensor necessary for stopping the operation of the temperature adjusting device when abnormal heat is generated, such as a control unit, is used, and it is determined whether or not it is necessary to execute a snow accumulation prevention process or a freeze prevention process based on the second sensor signal. By adopting the configuration, an increase in manufacturing cost can be avoided.

  Further, according to the temperature adjusting device of claim 5, the lubrication process is performed when the cold start processing condition is satisfied in a state where the control unit has not performed the temperature adjusting process for a predetermined time. As a cold / cold process, the refrigerant in the liquefied state increases due to the low outside air temperature. By operating and lubricating the compressor, it is possible to suitably avoid a situation in which a malfunction such as dragging or seizing occurs in the compressor.

It is a lineblock diagram of temperature control device 1 concerning an embodiment of the invention. It is a flowchart of the process 20 at the time of standby mode performed by the control part 9 of the temperature control apparatus 1 which concerns on embodiment of this invention. It is a flowchart of the lubrication process 30 performed by the control part 9 of the temperature control apparatus 1 which concerns on embodiment of this invention. It is a flowchart of the snow cover prevention process 40 performed by the control part 9 of the temperature control apparatus 1 which concerns on embodiment of this invention. It is a flowchart of the freeze prevention process 50 performed by the control part 9 of the temperature control apparatus 1 which concerns on embodiment of this invention.

  Hereinafter, an embodiment of a temperature adjustment device will be described with reference to the accompanying drawings.

  A temperature adjusting device 1 shown in FIG. 1 is a circulation type temperature adjusting device (chiller) that is an example of a “temperature adjusting device”, and includes a liquid storage tank 2, a refrigeration cycle 3, a pump 4, a heat exchanger 5, and a pressure. A sensor 6, a temperature sensor 7, a touch panel 8, a control unit 9, and a temperature sensor 10 are provided. These are accommodated in a housing (not shown), and cooling water W whose temperature is adjusted by a heat exchanger 5 as described later is pumped 4. The cooling process for adjusting the temperature of the supply target X (an example of “temperature adjustment process”) can be executed by supplying the supply target X with the pumping force. In addition, in the temperature control apparatus 1 of this example, although it is comprised so that industrial distilled water can be supplied to the supply object X as the cooling water W which is an example of a "heat-medium liquid", it replaces with industrial distilled water, It is also possible to adopt a configuration in which various liquids such as tap water and ethylene glycol are supplied as “heat medium liquid”.

  As an example, the liquid storage tank 2 is formed in a box shape capable of storing the cooling water W by bending a plate material such as stainless steel. In this case, in the temperature control apparatus 1 of this example, the pump 4 is attached on the liquid storage tank 2 as an example, and the pump 4 pumps up the cooling water W in the liquid storage tank 2 through the water absorption pipe P0. A configuration (an example in which a “supply pipe” for supplying cooling water W to the supply target X in combination with the water absorption pipe P0 and the pipe P1 is configured) is used to pump (supply) the supply target X through the pipe P1. ing. The liquid storage tank 2 is connected to a pipe P2 for collecting and storing the cooling water W supplied to the supply target X (“recovery pipe” for recovering the cooling water W from the supply target X). Yes. The liquid storage tank 2 is provided with a water absorption pipe for absorbing new cooling water W, a float valve for opening and closing the water absorption pipe according to the amount of liquid storage, and the like. In order to facilitate understanding of the configuration, the illustration and description thereof are omitted.

  The refrigeration cycle 3 includes a compressor 11, a condenser 12, an expansion valve 13, an evaporator 14, and a fan 15. In this case, the compressor 11 may include a motor (rotational speed variable type motor) that rotates at a rotational speed corresponding to the frequency of the electric power supplied from the inverter unit 11a as a power source to change the compression capacity of the refrigerant. It is configured to be able to. Although not shown, in the temperature control apparatus 1 (refrigeration cycle 3) of this example, an air inlet for introducing air into the casing is provided on the side of the casing, and the air in the casing is stored in the casing. An air exhaust port (an example of an “exhaust port”) that discharges to the outside of the body is provided on the top plate of the housing, and a condenser 12 is disposed so as to cover the air introduction port. The fan 15 is fixed to the top plate so that the air can be discharged.

  Thereby, in this temperature control apparatus 1, the air around a housing | casing is introduce | transduced in the housing | casing from an air inlet port by discharging | emitting the air in a housing | casing from an air discharge port with the fan 15, In this case, it was introduced Air is passed through the condenser 12 to cool the condenser 12 (the refrigerant in the condenser 12). In this case, the fan 15 is an example of a “fan”, and includes a motor (rotational speed variable type motor) that rotates at a rotational speed corresponding to the frequency of the electric power supplied from the inverter unit 15a as a power source. The cooling capacity of the condenser 12 (that is, the refrigerant condensing capacity of the condenser 12) can be changed.

  Further, the refrigeration cycle 3 of the present example detects the refrigerant pressure (refrigerant discharge pressure of the refrigerant from the compressor 11) in the refrigerant pipe that connects the compressor 11 and the condenser 12 to each other, and detects the sensor signal S16 ("first" The pressure sensor 16 (an example of a “pressure sensor”) that outputs an “an example of a sensor signal” of the sensor 15, and the operation of the fan 15 according to the refrigerant pressure specified by the control unit 9 based on the sensor signal S 16, as described later. The structure which cools the condenser 12 by controlling is employ | adopted. Furthermore, in this refrigeration cycle 3, the expansion valve 13 is comprised with the electronic expansion valve as an example. Moreover, in this refrigeration cycle 3, the evaporator 14 is comprised in the heat exchanger 5 so that it may mention later. In order to facilitate understanding of the operating principle of the refrigeration cycle 3, illustrations and detailed descriptions of the components other than the above-described components in the refrigeration cycle 3 are omitted.

  The pump 4 pumps the cooling water W in the liquid storage tank 2 to the supply target X as described above. In this case, in the temperature control apparatus 1 of this example in which the liquid storage tank 2 is connected to the supply target X via the water absorption pipe P0 and the pipes P1 and P2, the pump 4 supplies the cooling water to the supply target X via the pipe P1. The cooling water W is recovered from the supply target X to the liquid storage tank 2 through the pipe P2 by the pressure for supplying W.

  The heat exchanger 5 is an example of a “temperature regulator”, and as described above, the evaporator 14 of the refrigeration cycle 3 is configured therein, and the cooling water W is allowed to pass therethrough and is piped. It is arranged at P1. In this case, in the temperature control apparatus 1 of this example, the heat exchanger 5 is disposed between the pump 4 and the supply target X in the pipe P1. This heat exchanger 5 exchanges heat between the refrigerant that is passed through the expansion valve 13 of the refrigeration cycle 3 and discharged into the evaporator 14 and the cooling water W that is pumped by the pump 4, thereby adjusting the temperature adjustment device. The temperature of the cooling water W pumped from 1 to the supply target X is adjusted (cooling water W is cooled). Moreover, in the temperature control apparatus 1 of this example, the heat exchanger 5 is accommodated in the liquid storage tank 2 so as to be buried in the cooling water W stored in the liquid storage tank 2.

  The pressure sensor 6 is disposed in the pipe P1 (between the heat exchanger 5 and the supply target X in the pipe P1) and the pressure of the cooling water W pumped by the pump 4 toward the supply target X in the pipe P1. It detects and outputs sensor signal S6. The temperature sensor 7 is disposed in the pipe P1 (between the heat exchanger 5 and the supply target X in the pipe P1) and measures the temperature of the cooling water W that is pumped by the pump 4 toward the supply target X in the pipe P1. It detects and outputs sensor signal S7. The touch panel 8 is arranged on a control panel (not shown) and configured to display an operation condition setting screen for setting the operation condition of the temperature adjustment device 1 and an operation state display screen for displaying the operation state of the temperature adjustment device 1. In addition, the operation condition setting operation can be performed by touching the pseudo operation switch displayed on the operation condition setting screen.

  The control unit 9 controls the temperature adjustment device 1 as a whole. Specifically, the control unit 9 outputs a control signal S11 to the inverter unit 11a in the cooling process for cooling the supply target X (the supply process of the cooling water W to the supply target X), thereby causing the compressor 11 to The power is supplied to cause the refrigerant to be compressed, and the inverter unit 15a outputs a control signal S15 to supply power to the fan 15 to cool the condenser 12, thereby condensing the required amount of refrigerant, and By outputting the control signal S13 to the expansion valve 13, the required amount of refrigerant is discharged to the evaporator 14, and the control signal S4 is output to the pump 4 to pump the cooling water W.

  At this time, as an example, the control unit 9 specifies the temperature of the cooling water W in the pipe P1 based on the sensor signal S7 from the temperature sensor 7, and the compressor 11 sets the specified temperature to the set temperature. Feedback control is performed to adjust the rotational speed (compression capacity of the compressor 11: the amount of refrigerant compressed by the compressor 11), the opening of the expansion valve 13 (flow rate of refrigerant discharged into the evaporator 14), and the like. Further, the control unit 9 passes through the condenser 12 by controlling the inverter unit 15a in accordance with the refrigerant pressure specified based on the sensor signal S16 from the pressure sensor 16 and rotating the fan 15 at an arbitrary rotational speed. The amount of air to be adjusted is adjusted to adjust the amount of refrigerant condensed in the condenser 12.

  In this case, the temperature adjustment apparatus 1 of this example includes a switchboard (not shown) in which the touch panel 8 and the control unit 9 and the inverter units 11a and 15a are arranged, and generates heat in response to these operations. The temperature sensor 10 is disposed on the switchboard so that the temperature in the casing (temperature of the switchboard) that changes due to the temperature can be detected. The temperature sensor 10 is an example of a “temperature sensor”, and is configured to detect a temperature in the casing (temperature of the switchboard) and output a sensor signal S10 (an example of a “second sensor signal”). Yes.

  In addition, the control unit 9 specifies based on the sensor signal S10 from the temperature sensor 10 due to abnormal heat generation of each component arranged in the switchboard during the cooling process for cooling the supply target X When the measured temperature becomes equal to or higher than a pre-defined temperature (an example of “first temperature”: 50 ° C. as an example) (an example of “when the temperature rise processing start condition is satisfied”), A message that abnormal heat is generated is displayed on the touch panel 8 together with an output of a warning sound (an example of “temperature rise processing”), and then the temperature in the housing decreases when a predetermined time has elapsed. If not, the temperature adjusting device 1 is urgently stopped (another example of “temperature rise processing”).

  Furthermore, as an example, the control unit 9 specifies the pressure of the cooling water W in the pipe P1 based on the sensor signal S6 from the pressure sensor 6, and adjusts the temperature at a flow rate set by the user according to the specified pressure. The operation of the pump 4 is feedback-controlled so that the cooling water W is pumped from the apparatus 1 to the supply target X. Moreover, the control part 9 displays the pressure (pressure of the cooling water W in the piping P1) specified based on sensor signal S6 on the touch panel 8 with a numerical value, and notifies.

  Further, when the supply of the cooling water W to the supply target X is stopped (when the “cooling process” is not executed: when the control unit 9 shifts to a “standby mode” to be described later), the control unit 9 performs FIG. In the environment where there is a possibility of snow accumulation on the housing or freezing of the cooling water W as will be described later, the lubrication process 30, the snow accumulation prevention process 40, and the anti-freezing process 50 are performed. (Example of “Process during cold”: see FIGS. 3 to 5). The specific contents of the standby mode process 20 (the lubrication process 30, the snow accumulation prevention process 40, and the freeze prevention process 50) will be described in detail later.

  When the temperature adjustment device 1 cools the supply target X (supply of the cooling water W to the supply target X), after the power switch (not shown) is turned on, the touch panel 8 is touched to instruct the start of the cooling process (“ Instruction to start operation in “Cooling mode”). At this time, the controller 9 outputs a control signal S4 to the pump 4 to start pumping the cooling water W. Further, the control unit 9 outputs a control signal S11 to the inverter unit 11a to start compression of the refrigerant by the compressor 11, and outputs a control signal S15 to the inverter unit 15a to start blowing by the fan 15 to condense. The evaporator 12 is cooled, and a control signal S13 is output to the expansion valve 13 to discharge a necessary amount of refrigerant into the evaporator 14.

  Thereby, after the refrigerant compressed by the compressor 11 is condensed in the condenser 12, the refrigerant passes through the expansion valve 13 and is discharged into the evaporator 14 (in the heat exchanger 5). In the heat exchanger 5, the pump 4 The cooling water W pressure-fed by the refrigerant and the refrigerant in the evaporator 14 are subjected to heat exchange, and the cooling water W is cooled to a set temperature, and then is pumped to the supply target X via the pipe P1. As a result, the supply target X is cooled by the low-temperature cooling water W cooled in the heat exchanger 5. Further, the cooling water W whose temperature has been raised by cooling the supply target X is collected and stored in the liquid storage tank 2 via the pipe P2. In this case, in the temperature adjusting device 1 of this example, as described above, the control unit 9 monitors the pressure and temperature of the cooling water W in the pipe P1 when supplying the cooling water W to the supply target X, thereby refrigerating cycle 3. And feedback control of the pump 4.

  Specifically, the control unit 9 specifies the pressure (supply pressure) of the cooling water W being pumped toward the supply target X in the pipe P1 based on the sensor signal S6 from the pressure sensor 6. Next, the control unit 9 displays the specified pressure on the touch panel 8 as a numerical value. Thereby, the pressure of the cooling water W supplied to the supply target X from the temperature adjusting device 1 can be easily grasped. Subsequently, the control unit 9 maintains the flow rate set by the user (the amount of the cooling water W to be supplied from the temperature adjustment device 1 to the supply target X per unit time) according to the specified pressure. Finely adjust the rotational speed of the pump 4. Thereby, the cooling water W of the flow volume set to the supply object X from the temperature control apparatus 1 is supplied continuously.

  Further, the control unit 9 specifies the temperature of the cooling water W being pumped toward the supply target X in the pipe P1 based on the sensor signal S7 from the temperature sensor 7, and the sensor signal S16 from the pressure sensor 16. Based on the above, the refrigerant pressure between the compressor 11 and the condenser 12 (the refrigerant discharge pressure from the compressor 11) is specified. Next, the control unit 9 displays the specified temperature of the cooling water W on the touch panel 8 as a numerical value. Subsequently, the control unit 9 performs the refrigeration cycle in order to maintain the temperature set by the user (the temperature of the cooling water W to be supplied from the temperature adjustment device 1 to the supply target X) according to the specified temperature and pressure. 3 parts are controlled.

  At this time, when the temperature of the cooling water W specified based on the sensor signal S7 is lower than the set temperature (when the cooling water W is cooled to a temperature lower than the set temperature), the control is performed by the inverter unit 11a. Control to reduce the compression amount of the refrigerant by outputting the signal S11 to reduce the rotation speed of the compressor 11, and output the control signal S13 to the expansion valve 13 to reduce the discharge amount of the refrigerant into the evaporator 14 Control (control to reduce the amount of cooling heat of the cooling water W in the heat exchanger 5) is executed. Further, when the temperature of the cooling water W decreases and the rotation speed of the compressor 11 decreases, the refrigerant pressure specified based on the sensor signal S16 from the pressure sensor 16 decreases. The control signal S15 is output to the unit 15a to reduce the number of revolutions of the fan 15, thereby reducing the amount of cooling heat of the condenser 12 and reducing the amount of refrigerant condensed in the condenser 12. Thereby, the cooling water W of the temperature set to the supply target X from the temperature control apparatus 1 is supplied continuously.

  On the other hand, when the temperature of the cooling water W specified based on the sensor signal S7 is higher than the set temperature (when the cooling water W is not cooled to the set temperature), the control signal S11 is sent to the inverter unit 11a. Control to increase the amount of refrigerant compression by increasing the rotational speed of the compressor 11 and control to increase the refrigerant discharge amount into the evaporator 14 by outputting a control signal S13 to the expansion valve 13 ( Control for increasing the amount of cooling heat of the cooling water W in the heat exchanger 5 is executed. Further, when the temperature of the cooling water W rises and the rotational speed of the compressor 11 is increased, the refrigerant pressure specified based on the sensor signal S16 from the pressure sensor 16 rises. The control signal S15 is output to the unit 15a to increase the rotational speed of the fan 15, thereby increasing the amount of cooling heat of the condenser 12 and increasing the amount of refrigerant condensed in the condenser 12. Thereby, the cooling water W of the temperature set to the supply target X from the temperature control apparatus 1 is supplied continuously.

  In this case, as described above, in the temperature adjusting device 1 of this example, the temperature sensor 10 for detecting abnormal heating of the switchboard is disposed on the switchboard. Therefore, the switchboard generates heat due to the failure of the inverter units 11a and 15a and overload on these, and the temperature (temperature in the housing) specified based on the sensor signal S10 from the temperature sensor 10 is equal to or higher than the specified temperature. When this happens, the control unit 9 displays a message on the touch panel 8 indicating that the switchboard is abnormally heated, and outputs a warning sound from a speaker (not shown). In addition, when the temperature specified based on the sensor signal S10 does not fall below the specified temperature at the time when the specified time has elapsed from the message display and the warning sound output, the control unit 9 urgently stops the temperature adjustment device 1 Let As a result, it is possible to reliably avoid the occurrence of serious damage that is difficult to repair or the occurrence of a fire due to abnormal heat generation.

  On the other hand, when the supply of the cooling water W to the supply target X becomes unnecessary (when the “cooling process” is terminated), the touch panel 8 is operated to replace the operation in the “cooling process mode” with “ The operation in the “standby mode” is started. At this time, the control unit 9 starts the standby mode time process 20 shown in FIG. In this case, in the temperature control apparatus 1 of this example, when the condition described later is satisfied in the state of shifting to the “standby mode”, the “cold process” such as the lubrication process 30, the snow accumulation prevention process 40, and the freeze prevention process 50 are performed. The user can arbitrarily set whether or not to execute “.”. Therefore, the control unit 9 first determines whether or not the “cold process” is set to be executed (step 21), and if not set, an instruction (set) for executing the “cold process” is set. Wait until the operation is performed.

  Further, when the “cold process” is set to be executed (or when the setting operation for executing the “cold process” is performed: Step 21), the control unit 9 starts from the pressure sensor 16. It is determined whether or not the refrigerant pressure specified based on the sensor signal S16 is equal to or lower than a specified pressure (as an example, 1.05 MPa or lower) (step 22). In this case, in the temperature control apparatus 1 of this example, the pressure sensor 16 detects the refrigerant pressure at a portion close to the condenser 12 in the refrigerant pipe that connects the compressor 11 and the condenser 12 to each other, that is, in the refrigerant flow path. It is arranged at a possible position. Further, in the temperature adjustment device 1 in which the condenser 12 is disposed so as to cover the air inlet so that it can be cooled by the air introduced from the outside of the housing, when the “cooling process” is not executed (from the compressor 11) When the high-temperature and high-pressure refrigerant is not discharged), the condenser 12 has the same temperature as the outside air.

  Therefore, when there is a possibility that the outside air temperature is lowered and the snow cover or the cooling water W is frozen, the temperature of the condenser 12 is lowered to the same level as the outside air temperature, and piping in the condenser 12 and in the vicinity of the condenser 12 The refrigerant temperature in the interior decreases and the refrigerant pressure decreases. As a result, the refrigerant pressure specified on the basis of the sensor signal S16 from the pressure sensor 16 is in a state equal to or lower than the specified pressure (an example of a state in which “the cold start processing condition is satisfied”: step 22). The control unit 9 executes processing from step 24 onward, which will be described later.

  On the other hand, when the outside air temperature is high and there is no risk of snow accumulation or freezing of the cooling water W, the temperature of the condenser 12 decreases only to the same level as the outside air temperature (somewhat high temperature). In addition, the refrigerant temperature in the pipe near the condenser 12 is also maintained at the same level as the outside air temperature, and the refrigerant pressure is maintained at a certain level. As a result, the refrigerant pressure specified based on the sensor signal S16 from the pressure sensor 16 exceeds the specified pressure (step 22). At this time, the control unit 9 determines whether or not the temperature (temperature in the housing) specified based on the sensor signal S10 from the temperature sensor 10 is equal to or lower than a specified temperature (12 ° C. as an example) (step). 23).

  In this case, as an example, when the refrigeration cycle 3 is operated in a high load state during the operation in the “cooling process mode” immediately before the transition to the “standby mode”, the compressor 11 and the condenser 12 become high temperature. In this state, since the operation is shifted to the “standby mode” and the blowing by the fan 15 is stopped, it may take a long time for the refrigerant pressure that can be detected by the pressure sensor 16 to decrease even if the outside air temperature is low. On the other hand, the temperature of the air in the housing (for example, the temperature around the switchboard) decreases from the point of transition to the “standby mode”, and can be detected by the pressure sensor 16 as described above when the outside air temperature is low. Even in a state where the refrigerant pressure is maintained at a relatively high pressure, the refrigerant pressure is reduced to a temperature similar to the outside air temperature in a relatively short time.

  Therefore, in the temperature adjusting device 1 of this example, when the refrigerant pressure is not less than or equal to the specified pressure in step 22, the temperature specified in step 23 (temperature in the housing: in this example, the temperature near the switchboard) Is determined to be equal to or lower than a predetermined temperature (an example of “second temperature: 12 ° C. as an example”). In another example of the state, a configuration in which the processing after step 24 described later is executed is employed.

  When the outside air temperature is high, it is determined in step 22 that the refrigerant pressure is higher than the specified pressure, and then in step 23, it is determined that the temperature in the housing is higher than the specified temperature. The unit 9 returns to step 21 described above, determines that the “cold process” is set to be executed, and executes the determination process of step 22 and the process of step 23 again. Therefore, when the outside air temperature is low, a certain amount of time has passed after the transition to the “standby mode”, and the refrigerant pressure detected by the pressure sensor 16 becomes equal to or lower than the specified pressure, or is detected by the temperature sensor 10. When the temperature in the housing becomes equal to or lower than the specified temperature, the processing from step 24 is executed as described above.

  Specifically, when it is determined in the determination process of step 22 that the refrigerant pressure is equal to or lower than the specified pressure, or in the determination process of step 23, when it is determined that the temperature in the housing is equal to or lower than the specified temperature, the control unit 9 determines whether or not it is set to execute a lubrication process 30 to be described later (step 24). In this case, in the temperature adjustment apparatus 1 of this example, when the “cold cold processing start condition” is satisfied, the lubrication processing 30 is executed together with the snow accumulation prevention processing 40 and the freeze prevention processing 50 described later, or the lubrication processing 30 It is configured so that it is possible to set in advance whether to execute only the snow cover prevention process 40 and the freeze prevention process 50 without executing the above.

  At this time, when the control unit 9 is set to execute the lubrication process 30, the control unit 9 executes the three processes of the lubrication process 30, the snow cover prevention process 40, and the freeze prevention process 50 as "cold cold process". When the lubrication process 30 is set not to be executed, the two processes of the snow cover prevention process 40 and the freeze prevention process 50 are executed as “cold cold process”. In addition, in the temperature control apparatus 1 of the present example, a configuration in which the above three processes or two processes are executed in parallel is adopted, but in order to facilitate understanding of the processing contents of each process, Specific steps of these processes will be described individually.

  First, when the lubrication process 30 is executed, the control unit 9 determines whether or not the stop period of the refrigeration cycle 3 (compressor 11) exceeds a predetermined period (for example, 72 hours) as shown in FIG. Is determined (step 31). In this case, when the refrigeration cycle 3 mounted on this type of apparatus is stopped for a long period of time, the lubricating oil flows down in the compressor 11 and the oil film is likely to be cut off. When the operation of the refrigeration cycle 3 is started, there is a possibility that dragging or seizing may occur in the movable part in the compressor 11.

  Therefore, in the temperature control apparatus 1 of the present example, the “cold treatment start condition” is satisfied and the refrigeration cycle 3 (in the state where the lubrication treatment 30 is set to be executed as one of the “cold treatment”. When the stop period of the compressor 11) exceeds 72 hours (an example of a state in which the temperature adjustment process is not performed for a predetermined time), the control unit 9 controls the inverter unit 11a. The low-speed operation of the compressor 11 is started by outputting the signal S11 and supplying power to the compressor 11 (step 32). Thereby, lubricating oil is supplied to the movable part in the compressor 11, and it is sufficiently lubricated so that the oil film does not break.

  Next, after starting the operation of the compressor 11, the control unit 9 continues the operation of the compressor 11 until a predetermined time (for example, 10 minutes) elapses. (Step 33) The compressor 11 is stopped by outputting the control signal S11 to the inverter unit 11a and stopping the supply of power to the compressor 11 (Step 34). Thereafter, the control unit 9 ends the lubrication process 30 and returns to the standby mode process 20 to determine whether or not other necessary processes (snow accumulation prevention process 40 and freeze prevention process 50) have been completed ( Step 25). At this time, when all the processes are not completed, the process waits until the processes are completed. When all the necessary processes are completed, the process returns to step 21 described above, and the processes after step 22 are sequentially executed.

  Further, when the snow cover prevention process 40 is executed, the control unit 9 starts the operation of the fan 15 by outputting a control signal S15 to the inverter unit 15a and supplying power to the fan 15 as shown in FIG. Step 41). At this time, as a result of the air in the housing being discharged from the air discharge port by the fan 15, when the outside air temperature is low and there is snowfall, the snow on the housing is blown off by the air discharged from the air discharge port, and New snow accumulation is avoided. As a result, even if a small amount of snow has been generated on the housing before the operation of the fan 15 is started in step 41, a large amount of snow is removed from the housing as a result. Situations where snow has occurred are avoided.

  Next, after starting the operation of the fan 15, the control unit 9 continues the operation of the fan 15 until a predetermined time (for example, 3 minutes) elapses. 42) The fan 15 is stopped by outputting the control signal S15 to the inverter unit 15a and stopping the supply of power to the fan 15 (step 43). Subsequently, the control unit 9 stops the fan 15 and waits until a predetermined time (for example, 27 minutes) elapses. When the predetermined time elapses (step 44), this snow accumulation prevention is performed. After the process 40 is completed, the process returns to the standby mode process 20 to determine whether or not other processes (such as the freeze prevention process 50) have been completed (step 25). At this time, when all the processes are not completed, the process waits until the processes are completed. When all the necessary processes are completed, the process returns to step 21 described above, and the processes after step 22 are sequentially executed.

  Furthermore, when the freeze prevention process 50 is executed, the control unit 9 outputs a control signal S4 to the pump 4 to start operation as shown in FIG. 5 (starts pumping of the cooling water W: step 51). At this time, the cooling water W in the liquid storage tank 2 is pumped up by the pump 4 through the water absorption pipe P0 and is pumped to the supply target X through the pipe P1, so that the liquid storage tank 2 is supplied from the supply target X. The cooling water W is recovered via the pipe P2. Therefore, even when the outside air temperature is low and the cooling water W may freeze, the cooling water W in the liquid storage tank 2, the water absorption pipe P0, and the pipes P1 and P2 is cooled by the operation of the pump 4. As a result of moving the W flow path (the flow path recovered from the liquid storage tank 2 of the temperature adjustment apparatus 1 through the supply target X to the liquid storage tank 2 of the temperature adjustment apparatus 1), the situation where the cooling water W freezes is avoided. Is done. Further, when the pump 4 is operated, the pump 4 generates heat slightly, and the temperature of the cooling water W slightly rises due to this, so that freezing of the cooling water W is more preferably avoided.

  Next, the control unit 9 continues the operation of the pump 4 until a predetermined time (for example, 2 minutes) elapses from the start of the operation of the pump 4 in step 51, and when the specified time elapses (step 52). ), The control signal S4 is output to the pump 4 to stop the operation (step 53). Subsequently, the control unit 9 waits until a predetermined time (for example, 28 minutes) elapses after the pump 4 is stopped, and when the predetermined time elapses (step 54), the freeze prevention is performed. The process 50 is terminated, the process returns to the standby mode process 20, and it is determined whether or not other processes (snow accumulation prevention process 40, etc.) have been completed (step 25). At this time, when all the processes are not completed, the process waits until the processes are completed. When all the necessary processes are completed, the process returns to step 21 described above, and the processes after step 22 are sequentially executed.

  In this case, the compressor 11 is operated for 10 minutes in the lubrication process 30, the fan 15 is operated for 3 minutes in the snow cover prevention process 40, and then waits for 27 minutes in the stopped state, and the pump 4 is operated for 2 minutes in the freeze prevention process 50. In the temperature control apparatus 1 of the present example that waits for 28 minutes in the stopped state after being stopped, as an example, when it is determined that the lubrication process 30 is set to be executed in step 24 of the standby mode process 20, the lubrication process is performed. The process 30, the snow cover prevention process 40, and the freeze prevention process 50 are started simultaneously, and all the processes 30, 40, 50 are completed when 30 minutes have elapsed. Therefore, in an environment where the outside air temperature is low and snow or freezing may occur, when 30 minutes have elapsed since the start of each process 30, 40, 50, each of these processes 30, 40, 50 is performed. Is started again, and each process 30, 40, 50 is repeated at a cycle of once every 30 minutes as long as the outside air temperature is low and a low temperature state in which snow and freezing may occur continues.

  Thereby, in the temperature control apparatus 1 of this example, there is an instruction to start an operation in the “cooling process mode” (an instruction to end an operation in the “standby mode”), or there is no possibility that snow or freezing will occur. The fan 15 and the pump 4 are operated at a cycle of once every 30 minutes until the outside air temperature becomes high. In addition, about the lubrication process 30, it determines with the stop period not having exceeded the prescribed | regulated period after the 2nd time (step 31), and is complete | finished substantially without performing.

  As described above, according to the temperature adjustment device 1, the control unit 9 is specified based on the sensor signal S <b> 16 from the pressure sensor 16 in a state where the cooling process (temperature adjustment process) for cooling the supply target X is not performed. When the refrigerant pressure is equal to or lower than a predetermined pressure, it is determined that “the cold start processing start condition” is satisfied, and at least one of the snow accumulation prevention process 40 and the freeze prevention process 50 (both in this example) is “ By performing the process as “cold cold process”, the supply target X is cooled as compared with a configuration provided with a dedicated temperature sensor or the like for determining whether or not the snow accumulation prevention process 40 or the freeze prevention process 50 is necessary. The pressure sensor 16 necessary for specifying the operating state of the refrigeration cycle 3 in order to supply the cooling water W at the set temperature to the supply target X during the “cooling process” is performed, and its sensor signal S1 By adopting a configuration for determining whether or not the snow cover prevention process 40 or the freeze prevention process 50 is necessary based on the above, the snow cover prevention process 40 or the freezing process can be performed when the outside air temperature is low without causing an increase in manufacturing cost. The prevention process 50 can be accurately executed to suitably avoid the occurrence of snow accumulation and freezing. Further, it is determined whether or not the snow accumulation prevention process 40 or the freeze prevention process 50 is necessary based on the refrigerant pressure in the vicinity of the condenser 12 that is brought into contact with the outside air and is changed in temperature to the same level as the outside air temperature. When the temperature is low, the snow cover prevention process 40 and the freeze prevention process 50 can be reliably executed, and thus it is possible to reliably avoid the occurrence of snow cover and freezing.

  Furthermore, according to the temperature adjusting device 1, the temperature in the housing specified based on the sensor signal S10 from the temperature sensor 10 in a state where the control unit 9 is not performing the cooling process is a predetermined temperature (first step). 2), when the “cold cold treatment start condition” is satisfied and the “cold cold treatment start condition” is executed, when the outside air temperature is low, the temperature in the housing is relatively short. For example, the refrigerant temperature between the compressor 11 and the condenser 12 is high due to the fact that the refrigeration cycle 3 was operated in a high load state immediately before the end of the cooling process. Even if it takes a certain amount of time to decrease, it is possible to reliably execute the snow cover prevention process 40 and the freeze prevention process 50 in accordance with the temperature drop in the housing. More accurate occurrence It can be avoided to.

  In addition, according to the temperature adjusting device 1, by adopting the configuration using the temperature sensor 10 disposed on the switchboard so that the temperature of the switchboard disposed in the casing can be detected, the inverter units 11a and 15a and the control unit are controlled. The temperature sensor 10 necessary for stopping the operation of the temperature adjusting device 1 when the unit 9 or the like generates abnormal heat is used, and whether or not the snow accumulation prevention process 40 or the freeze prevention process 50 is necessary is determined based on the sensor signal S10. By adopting the configuration for discrimination, it is possible to avoid an increase in manufacturing cost.

  Furthermore, according to the temperature adjusting device 1, the lubrication process 30 is performed when the control unit 9 does not perform the cooling process for a predetermined time and the “cold process start condition” is satisfied. Is executed as a `` cold cold process '', the refrigerant in the liquefied state increases due to the low outside air temperature, and compression is performed at specified times even in an environment where poor lubrication is likely to occur due to this. By causing the machine 11 to operate and lubricate, it is possible to suitably avoid a situation in which malfunction such as dragging or seizure occurs in the compressor 11.

  The configuration of the “temperature adjusting device” is not limited to the configuration of the temperature adjusting device 1 described above. For example, the temperature adjustment device 1 configured to be able to execute three processes of a lubrication process 30, a snow cover prevention process 40, and a freeze prevention process 50 when the “cold cold process start condition” is satisfied will be described as an example. However, the configuration of the “temperature adjustment device” is not limited to this, and a configuration is adopted in which at least one of the snow accumulation prevention process 40 and the freeze prevention process 50 is executed when the “cold cold processing start condition” is satisfied. can do. In addition, the temperature adjustment device 1 having the configuration in which the sensor signal S10 from the temperature sensor 10 disposed on the switchboard is used as the “second sensor signal” has been described as an example. In order to detect abnormal heating of the compressor 4 and the compressor 11, a configuration in which a sensor signal from a temperature sensor (not shown) disposed in the housing is used as a “second sensor signal” may be employed. .

  Furthermore, as an example of the temperature adjustment, the temperature adjustment apparatus 1 that executes the process of cooling the cooling water W as the “heat medium liquid” has been described as an example. In addition to such a configuration, It is also possible to adopt a configuration in which the temperature is adjusted by heating. In this case, as a configuration for heating the “heating medium liquid”, a “temperature adjusting device” including a heat source such as an electric heater can be adopted to configure the “temperature adjusting device”. Further, although the circulation type temperature adjusting device 1 that collects the cooling water W from the supply target X via the pipe P2 has been described as an example, the configuration of the “temperature adjustment device” is not limited to this, "Temperature adjustment device" (a configuration that does not collect the "heat medium liquid") that only supplies "heat medium liquid" to the "thermal medium liquid" can also be configured to perform various "cold cold treatment" . In addition, when adopting a configuration that does not collect the “heat transfer fluid”, the “storage tank” (the component for storing the “heat transfer fluid” that is pumped to the “supply target”) is not required. You can also.

DESCRIPTION OF SYMBOLS 1 Temperature control device 3 Refrigerating cycle 4 Pump 5 Heat exchanger 9 Control part 10 Temperature sensor 11 Compressor 11a, 15a Inverter unit 12 Condenser 15 Fan 16 Pressure sensor 20 Process in standby mode 30 Lubrication process 40 Snow prevention process 50 Freezing prevention Process P0 Water absorption pipe P1, P2 Piping S4 Control signal S10, S16 Sensor signal S11, S15 Control signal W Cooling water X Supply target

Claims (5)

A pump for pumping the heat transfer fluid to the supply target;
A temperature regulator configured to allow passage of the heat transfer fluid and adjust the temperature of the heat transfer fluid; and
A refrigeration cycle having a compressor, a condenser, an expansion valve, an evaporator and a fan, wherein the evaporator is configured in the temperature regulator;
A pressure sensor that detects a refrigerant pressure in a refrigerant pipe that interconnects the compressor and the condenser in the refrigeration cycle and outputs a first sensor signal;
While adjusting the amount of air passing through the condenser by controlling the fan according to the refrigerant pressure specified based on the first sensor signal, and adjusting the amount of refrigerant condensed in the condenser, A control unit that controls the pump to pump the heat transfer fluid is housed in a housing,
A temperature adjustment device configured to be able to execute a temperature adjustment process for adjusting the temperature of the supply target by supplying the heat medium liquid temperature adjusted by the temperature adjuster to the supply target by the pumping force of the pump,
The top plate of the housing is provided with a discharge port through which the air in the housing can be discharged by the fan.
The fan is disposed so that the condenser can be cooled by air newly introduced into the casing by discharging the air in the casing from the outlet.
When the refrigerant pressure specified based on the first sensor signal is equal to or lower than a predetermined pressure in a state where the temperature adjustment process is not performed, the control unit determines that the cold start process start condition is As it is satisfied, the snow is prevented from being accumulated on the top board by rotating the fan, and the heat medium liquid is prevented from freezing by rotating the pump and pumping the heat medium liquid. A temperature control device that executes at least one of the freeze prevention process as a cold process.   The temperature control device according to claim 1, wherein the control unit executes both the snow accumulation prevention process and the freeze prevention process as the cold time process when the cold start process start condition is satisfied. A temperature sensor that detects a temperature in the housing and outputs a second sensor signal;
When the temperature rise processing start condition is satisfied, the control unit determines in advance that the temperature specified based on the second sensor signal during the temperature adjustment processing is equal to or higher than the first temperature specified in advance. The temperature inside the casing specified based on the second sensor signal in a state in which the specified temperature rise processing is executed and the temperature adjustment processing is not executed is equal to or lower than a predetermined second temperature. The temperature adjustment device according to claim 1 or 2, wherein the cold-time processing is executed when the cold-temperature processing start condition is satisfied.   The temperature control device according to claim 3, wherein the temperature sensor is disposed on the switchboard so that the temperature of the switchboard disposed in the housing can be detected.   The control unit operates the compressor to move the compressor when the cold start processing condition is satisfied in a state where the temperature adjustment processing is not executed for a predetermined time. The temperature control apparatus according to any one of claims 1 to 4, wherein a lubrication process for supplying lubricating oil to a section is performed as the cold process together with at least one of the snow accumulation prevention process and the freeze prevention process.

Images