88 results about "Outside air temperature" patented technology

The invention discloses an efficient and energy-saving production workshop ventilation system and method, and relates to the technical field of production workshop ventilation, the workshop ventilation system comprises an environment detection module, a quality evaluation module, a ventilation heat exchange module and an energy-saving regulation and control module, the environment detection module comprises an acquisition unit, the acquisition unit is used for acquiring air multi-dimensional detection data in the workshop main body and air temperature outside the workshop main body; the invention also discloses a workshop ventilation method, and the method comprises the steps: obtaining the air quality indexes and the temperature and humidity indexes of different regions in the workshop main body through separately monitoring the different regions of the workshop; and when the air quality index or the temperature and humidity index of a certain area reaches a critical value, an optimal ventilation and heat exchange regulation and control scheme with the highest ventilation and heat exchange efficiency and the least energy consumption is formulated for the area, so that the effect of improving the ventilation and heat exchange response rate and the energy utilization rate is achieved under the condition that the workshop air quality and the environment comfort degree are maintained. And the effects of saving energy and reducing the maintenance cost are achieved.

In a refrigerant circuit in which an indoor unit is connected to an outdoor unit by a refrigerant pipe, a predetermined amount of refrigerant is filled, the outdoor unit has a compressor, an outdoor heat exchanger, and an expansion valve, and the indoor unit has an indoor heat exchanger. The air conditioner has a calculation model that calculates an amount of refrigerant remaining in the refrigerant circuit using at least a rotational speed of the compressor, a refrigerant discharge temperature of the compressor, a heat exchanger temperature, an opening degree of the expansion valve, and an outside air temperature, which are amounts indicating an operating state at the time of operation. The indoor heat exchanger has a sensor for detecting a temperature of refrigerant flowing through an indoor heat exchanger intermediate portion that connects a first indoor heat exchanger port portion and a second indoor heat exchanger port portion. The outdoor heat exchanger has an outdoor heat exchanger intermediate portion that connects a first outdoor heat exchanger port portion and a second outdoor heat exchanger port portion, and a sensor provided in the second outdoor heat exchanger port portion for detecting a temperature of refrigerant flowing from an outdoor heat exchanger outlet of the second outdoor heat exchanger port portion at the time of refrigeration operation. The present invention provides an air conditioner that can calculate the amount of refrigerant remaining even when only limited sensors are provided.

An embodiment oil temperature control system for an electric vehicle includes a heat exchange unit that performs heat exchange between an oil for cooling a driving motor and a coolant, a temperature sensor including an oil temperature sensor or an outside air temperature sensor, a controller that receives a signal from the temperature sensor to determine whether a heat generation mode entry condition to cause a power electronic part to generate heat is satisfied and operates the power electronic part in a heat generation mode when the heat generation mode entry condition is satisfied, and a cooling system that allows the coolant used to cool the power electronic part operating in the heat generation mode to circulate through a passage penetrating the heat exchange unit so that the coolant exchanges heat with the oil in the heat exchange unit.

Air conditioning system for a vehicle with an idle-stop function, comprising: an indoor / outdoor air ratio control device (21a, 21b, 28) for controlling an introduction ratio between indoor and outdoor air, wherein the indoor / outdoor air ratio control device (21a, 21b, 28) is installed in a vehicle with an idle-stop function of an engine (11) and has an indoor / outdoor air flap (21a) for switching indoor and outdoor air, which is arranged in an air conditioning duct, which introduces outdoor air from outside a vehicle interior via an outdoor air inlet (21i) and indoor air from inside the vehicle interior via an indoor air inlet (21j) and discharges the outdoor and indoor air into the vehicle interior via a nozzle (21k),wherein the indoor / outdoor air flap (21a) is arranged downstream of the indoor and outdoor air inlet and comprises an indoor / outdoor air flap actuator (21b) for actuating the indoor / outdoor air flap (21a); ​​an air flow rate control device (21c, 28) arranged downstream of the indoor / outdoor air ratio control device in the air conditioning duct and which controls an air flow rate of the air to be introduced; a temperature control device (21d, 28) arranged downstream of the air flow rate control device in the air conditioning duct and which controls the temperature of the introduced air in response to activation of the motor; an air conditioning operating section (29) configured for setting the air flow rate, a temperature, and an indoor / outdoor air mode for air conditioning; and an outdoor air temperature sensing device (31) for sensing the outdoor air temperature, characterized in thatthat the air conditioning system has an air conditioning control unit (28), A / C ECU (28), for performing general control of the air conditioning system, wherein the air conditioning control unit (28) is configured, while the vehicle is in an idle-stop state and the outside air mode is set by the air conditioning operating section (29), to adjust the opening degree of the inside / outside air flap (21a) to a first predetermined opening degree (Θ1) by means of the inside / outside air flap actuator (21b), thereby causing the proportion of outside air to be higher than that of inside air when the outside air temperature (Ta) detected by the outside air temperature sensing device (31) is lower than a first predetermined temperature (T1); to adjust the opening degree of the inside / outside air flap (21a) to a second predetermined opening degree (Θ2) to cause the proportion of inside air to be higher than that of outside air,when the outside air temperature (Ta) is greater than or equal to a second preset temperature (T2), and to adjust the opening degree of the inside / outside air flap (21a) according to the outside air temperature (Ta) to a value between the first preset opening degree (Θ1) and the second preset opening degree (Θ2), when the outside air temperature (Ta) is greater than or equal to the first preset temperature (T1) and lower than the second preset temperature (T2), and the air conditioning control (28) is further configured, while the vehicle is in the idle-stop state, for the air flow control device (21c, 28) to set a blower stage of a blower unit (21c) to a preset blower stage (Lo2) when the blower stage is greater than or equal to the preset blower stage (Lo2), and to maintain the blower stage of the blower unit (21c) at the current stage when the The fan speed is lower than the specified speed (Lo2).

To provide a refrigerator that can prevent freezing (malfunction) of dampers and other components, as well as condensation inside the refrigerator compartment, even when the outside temperature is close to the target temperature of the refrigerator compartment. [Solution] The refrigerator 1 comprises a refrigerator compartment 21, an outside air temperature sensor 101, a control unit 130, a door 21X that opens and closes the opening of the refrigerator compartment 21, and a condensation prevention heater 210 provided in the partition separating the inside and outside of the door 21X. The control unit 130 temporarily activates the heater 210 when the outside air temperature measured by the outside air temperature sensor 101 is below a predetermined threshold.

The present invention provides a work machine capable of operating in the same manner as with an operation state in a normal environment even when used in a low-temperature environment where the outside air temperature is low.　The present invention comprises a battery (6), an electrical device (5) that is supplied with electric power from the battery (6), and a control device (8) that controls charging of the battery (6). The control device (8) has at least a low-temperature environment mode (Mc1) in which charging control of the battery (6) is performed in a low-temperature environment, and a normal environment mode (Mc2) in which charging control of the battery (6) is performed in a normal environment at a higher temperature than the low-temperature environment. A first full-charge amount value that is for use in a normal environment, and a second full-charge amount value that is for use in a low-temperature environment and is set to a higher value than the first full-charge amount value, are set as full-charge amount values for the battery (6). In the normal environment mode (Mc2), the battery (6) is charged to the first full-charge amount value, and in the low-temperature environment mode (Mc1), the battery (6) is charged to the second full-charge amount value.

The invention provides a road surface drawing apparatus for a vehicle. The present invention addresses the problem of suppressing glare to people due to reflection of pattern light from a road surface drawing device on an icy road surface. A road surface drawing device of a vehicle includes a road surface drawing lamp that emits pattern light, and a controller that controls the road surface drawing lamp. The controller determines a plurality of conditions including a first condition, a second condition, and a third condition every time the vehicle travels a fixed distance (Dc). The first condition is that the outside air temperature of the vehicle is equal to or less than a predetermined temperature (Tth). The second condition is that the brightness of the reflected light in the irradiation area of the headlamp of the vehicle is equal to or less than the predetermined brightness (BRth). The third condition is that at least one of the ABS, the ESC, and the TRC is operated during the travel of the vehicle at the most recent predetermined distance (Dp). When the plurality of conditions are satisfied, the controller executes glare reduction control for stopping irradiation of at least a portion of the pattern light, reducing the amount of light, or changing the form of the pattern light.

A power amount control device (10) has a storage unit (180) that stores situation information as training data (550). The power amount control device (10) also comprises a training data reuse unit (161) that, if new situation information including an unencountered outside air temperature range that is not stored as the training data (550) is generated in an operation stage, identifies situation information having the same in-room initial temperature level, load arrangement pattern, and air-conditioning control level in an outside air temperature range closest to the outside air temperature of the unencountered outside air temperature range, reuses an air-conditioning power function and a temperature function indicated by the identified situation information, and sets the air-conditioning control level indicated by the identified situation information to the new situation information after a prescribed adjustment process has been carried out.

Provided is an air conditioner. The air conditioner includes a compressor, a power module configured to drive the compressor, a power module temperature sensor configured to detect the temperature of the power module, a memory configured to store one or more computer programs, and one or more processors communicatively coupled to the compressor, the power module, the power module temperature sensor, and the memory, wherein the one or more computer programs include computer-executable instructions that, when executed individually or collectively by the one or more processors, cause the air conditioner to: determine whether a current of the compressor corresponding to a target frequency of the compressor is greater than or equal to an upper limit current corresponding to the outside air temperature, and, on the basis of determining that the current of the compressor is greater than or equal to the upper limit current corresponding to the outside air temperature, limit the current applied to the compressor to a value less than the upper limit current corresponding to the outside air temperature when the outside air temperature is less than a reference temperature, and increase the current applied to the compressor to a value greater than or equal to the upper limit current on the basis of the detected temperature of the power module when the outside air temperature is greater than or equal to the reference temperature.

Method for controlling a hybrid powertrain system (20) comprising an internal combustion engine (40), wherein the method comprises controlling the operation of the hybrid powertrain system (20) in response to a trajectory of a preferred minimum coolant temperature for the internal combustion engine (40), wherein controlling the operation of the hybrid powertrain system (20) comprises performing a control of the hybrid powertrain system (20) in response to the trajectory of the preferred minimum coolant temperature for the internal combustion engine (40) and in response to an engine coolant temperature, characterized in that several trajectories (312, 314, 316, 318, 320) of the preferred minimum coolant temperature comprise minimum coolant temperatures related to a vehicle running time (310) that are associated with an initial warm-up phase of operation and a stabilized phase of operation, An outside air temperature, the vehicle running time (310) and a vehicle warm-up time are used to select the trajectory of the preferred minimum coolant temperature from the several trajectories (312, 314, 316, 318, 320), and The execution of the control of the hybrid powertrain system (20) includes: a basic characteristic map of an engine heat dissipation response for the internal combustion engine (40) is adapted with a scalar multiplier, which is determined with reference to a difference between the trajectory of the preferred minimum coolant temperature for the internal combustion engine (40) and the engine coolant temperature, wherein the basic characteristic map of the engine heat dissipation response includes basic operating costs (430) for heat dissipation, which are determined with reference to engine operating points defined by an engine speed (420) and an engine torque (410) for the internal combustion engine (40), and wherein the scalar multiplier is adjusted to minimize the operation of the internal combustion engine (40) associated with achieving the preferred minimum coolant temperature; and The operation of the internal combustion engine (40) is controlled to generate heat in order to ensure that the coolant temperature follows the trajectory of the preferred minimum coolant temperature.

Disclosed is a vehicle-mounted air-conditioning system capable of quickly cooling the interior of a vehicle with high energy efficiency. This vehicle-mounted air conditioning system is provided with: an air conditioning device that is mounted on a vehicle and that can be switched between an inside air circulation mode and an outside air introduction mode; and a controller that, during a cooling operation, causes the air conditioning device to perform a cooling operation in the outside air introduction mode when an in-vehicle temperature is higher than an outside air temperature, and causes the air conditioning device to perform a cooling operation in the outside air introduction mode when a temperature difference between the in-vehicle temperature and the outside air temperature is equal to or less than a predetermined reference value even if the in-vehicle temperature is higher than the outside air temperature. And the air conditioning device is also switched into the internal air circulation mode.

Method for evaluating the accuracy of a monitoring system for a motor vehicle battery cooling system; Method for evaluating the accuracy of an outside air temperature measurement of a motor vehicle, comprising: • a step of collecting observational data including: o a date and time of measurement of an outside temperature, o a temperature measured by a temperature sensor fitted to the vehicle, o a geographical position of the vehicle at the date and time of measurement determined by a vehicle geolocation system; • a step of acquiring a reference temperature provided by a meteorological service provision system, the reference temperature being determined based on the geographical position of the observational data and based on the date and time of the observational data; • then,a step comparing the difference between the temperature of the observed data and the reference temperature to a predefined threshold. Figure for the abstract: 1,

A cooling control apparatus for an electric vehicle includes a processor. The processor is configured to control a cooler. The cooler is configured to cool a battery that is configured to supply electric power to a traveling motor of the electric vehicle. The processor is configured to limit an operation of the cooler when: an outside air temperature outside the electric vehicle is equal to or lower than a predetermined temperature; and the electric power of the battery is expected to be equal to or less than a predetermined amount.

The utility model relates to the technical field of loaders, in particular to a loader cab based on indoor pressure regulation. In the application, an air control pressure regulating system is constructed through an air inlet fan and an air exhaust fan which are correspondingly provided with ventilation pipelines, and a three-stage filtering system is arranged on the inner side of the outer connecting end of each ventilation pipeline; the air pressure sensor is combined, operation of the air inlet fan and the air exhaust fan is adjusted in real time through the air control adjuster, it is ensured that the air pressure range in the cab is positive pressure, external filtered air is actively driven to conduct cab air inside and outside flowing circulation, and based on the difference between the internal air pressure and the external air pressure, external unfiltered air is effectively prevented from entering the cab. In addition, the temperature regulator is combined with the temperature sensor, the air temperature in the cab can be regulated based on the outside air temperature, and the indoor comfort is improved; the oxygen increasing device is combined with the oxygen concentration sensor, the oxygen content in the cab can be adjusted based on the outside air oxygen content, and the indoor comfort degree is improved.

To provide an air conditioner control device, an air conditioning system, an air conditioner control method and a program capable of making a target region, which is a target to be air-conditioned, an environment comfortable for a user.SOLUTION: A cloud server 1 comprises: a location acquisition unit 111 that acquires location information indicating a user's location; a travel distance calculation unit 114 that calculates a travel distance from the user's location where the user is present outside a building to the building based on the location information; an outside air temperature information acquisition unit 113 that acquires outside air temperature information indicating an outside air temperature along the user's travel path to the building; a perceived temperature estimation unit 115 that estimates the user's perceived temperature when the user returns to the building based on the travel distance and the outside air temperature; an air conditioning setting unit 116 that performs operation settings of the air conditioner 4 that conditions the air inside the building based on the estimated perceived temperature; and a device control unit 117 that controls the air conditioner 4 with the operation settings.SELECTED DRAWING: Figure 3

This information presentation device presents an operation stage of an in-operation constant-temperature device provided with an accommodation chamber and a compressor. The information presentation device comprises: a storage unit that stores a threshold value set for determining the operation stage; an acquisition unit that acquires device information including information of the internal temperature of the accommodation chamber, information of the temperature of air outside the constant-temperature device, and information of an operation parameter of the compressor; and a control unit that acquires the operation stage on the basis of the device information and the threshold value set, and presents the acquired operation stage.

Provided are a method and an apparatus for generating a quick charge map. The method for generating a quick charge map, according to the present invention, comprises the steps of: obtaining a plurality of charging-test results each associated with a plurality of charging conditions that are combinations of a plurality of current rates and a plurality of outside air temperatures; analyzing the plurality of charging-test results to determine a plurality of charging-characteristic profiles each associated with an outside air temperature; and analyzing the plurality of charging-characteristic profiles to determine a plurality of charging-control profiles individually associated with a plurality of temperatures of interest, wherein the quick charge map is a set of the plurality of charging-control profiles.

The utility model discloses a kind of over-temperature dehumidification heat pump unit of heat preservation dew condensation supercooling bridge structure swimming, including dehumidification heat pump machine main body and the cabinet for containing dehumidification heat pump machine main body, cabinet includes several plate bodies and door body;Plate body and door body are all provided with thermostatic regulating system, thermostatic regulating system is used for plate body and door body and outside air temperature temperature dynamic keeping consistent, using the effect that thermostatic regulating system makes plate body and door body and outside air temperature temperature dynamic keeping consistent, prevent the surface of cabinet from dew condensation caused by temperature difference, avoid dew water to cause corrosion and damage to equipment, improve heat preservation effect simultaneously, avoid its damage to internal dehumidification heat pump machine main body.

Provided is a heat pump device with which it is possible to maintain a high-low pressure difference of a refrigerant circulating in a refrigerant circuit at a prescribed value or greater. In a warming mode in which a water heat exchanger (7) is operated as a condenser and an outdoor heat exchanger (15) is operated as an evaporator, and when the outside air temperature is equal to or higher than a first threshold value, the degree of superheating of low-pressure refrigerant suctioned into a compressor is controlled to a prescribed value by a second expansion valve (13), and the high-pressure refrigerant flowing through the water heat exchanger (7) is controlled so as to be equal to or higher than a prescribed value by a first expansion valve (9).

A liquid droplet ejecting apparatus is provided. The liquid droplet ejecting apparatus includes a head that ejects liquid droplets toward a medium, a heater that heats the medium on which the liquid droplets are ejected from the head, a supply fan that blows outside air from outside of a frame that houses the head and the heater toward the inside, a temperature sensor that detects a temperature of the outside air blown by the supply fan, and a control unit that changes a set temperature of the heater to a lower temperature than a predetermined temperature when the temperature of the outside air detected by the temperature sensor is lower than the predetermined temperature.

The objective is to provide a refrigeration cycle system that can achieve improved warm-up and heating performance even under low ambient temperature conditions. [Solution] The refrigeration cycle device comprises a compressor, a condenser that performs heat exchange with a unit to be warmed, an expansion valve, an evaporator that vaporizes a refrigerant, and a control unit that controls the dryness of the refrigerant drawn into the compressor. When the unit to be warmed by the refrigeration cycle device is determined to be in an environment with an outside air temperature lower than a predetermined temperature based on the outside air temperature detected by the outside air temperature detection unit, and a warming request is made for the unit to be warmed, the control unit adjusts the opening of the expansion valve to reduce the dryness, which is estimated based on the discharge temperature, condensation temperature, discharge pressure, and compression ratio of the refrigerant, to a range of dryness that enhances the warming function of the refrigeration cycle device, thereby improving the intake density of the refrigerant.

Disclosed are an electronic device and a control method for controlling the temperature of a speaker. The electronic device comprises: a sensor for sensing the outside air temperature; a speaker for outputting sound; and at least one processor. The at least one processor predicts the energy of the sound. The at least one processor uses a thermal model to predict a temperature increase or decrease amount of the speaker from the predicted energy of the sound. The at least one processor predicts the temperature of the speaker on the basis of the outside air temperature and the temperature increase or decrease amount of the speaker. The at least one processor maintains the temperature of the speaker at or below a threshold temperature on the basis of the predicted temperature and the threshold temperature of the speaker.

This utility model discloses a ventilation and air exchange device for an explosion-proof analytical cabin. The structure includes a cabin body, a mounting box fixed to the cabin body by screws, a first motor mounted on the mounting box, a ventilation fan connected to the output end of the first motor, a clamp and a rubber ring mounted on the inner wall of the mounting box, and a first filter plate detachably connected inside the clamp; and an air exchange unit including a mixing chamber. In use, the air inside the cabin body is filtered by a second filter plate and then enters a transition chamber. When the external air temperature is low, a one-way solenoid valve is opened, allowing a portion of the indoor air to enter the exhaust chamber through a second pipe and be discharged through a vent. Another portion of the indoor air enters the mixing chamber through the first pipe, mixing with the external cold air to raise its temperature before entering the cabin body. This utilizes waste heat to heat the air, preventing condensation of the external cold air inside the cabin and thus preventing moisture damage to the equipment.

A control device for an air conditioning device comprises: a reception unit that receives an operation stop command; a reading unit that reads an outside air temperature, an enclosed refrigerant amount, and a predetermined refrigerant amount threshold when the operation stop command is received; a refrigerant amount acquisition unit that acquires an indoor-side refrigerant amount for each elapsed time on the basis of a table including a time from a predetermined operation stop and a ratio of a predicted value of the indoor-side refrigerant amount when the time elapses; a comparison unit that compares the indoor-side refrigerant amount with the refrigerant amount threshold; and a determination unit that determines whether to perform a cooling operation for transferring the refrigerant remaining on the indoor heat exchanger side to the outdoor heat exchanger side on the basis of a result of comparison performed by the comparison unit.

The purpose of the present invention is to suppress glare to people due to reflection of pattern light from a road surface drawing device on an icy road surface. A road surface drawing device for a vehicle is provided with: a road surface drawing lamp for irradiating pattern light; and a controller for controlling the road surface drawing lamp. The controller determines a plurality of conditions including a first condition, a second condition, and a third condition. The first condition is that the illuminance outside the vehicle is equal to or less than a predetermined illuminance ILth. The second condition is that the outside air temperature of the vehicle is equal to or less than the predetermined temperature Tth. The third condition is that the traction control TRC operates a predetermined number of times N1th or more within the predetermined time t1th, and the lateral slip suppression control ESC operates a predetermined number of times N2th or more within the predetermined time t1th. When the plurality of conditions are satisfied, the controller executes glare reduction control for stopping irradiation of at least a portion of the pattern light, reducing the amount of light, or changing the manner.

A detection system 1 comprises: a thermoelectric conversion element 2 that generates an electromotive force due to a temperature difference; and a processing device 6. The processing device 6 executes: an acquisition step for acquiring the value of the electromotive force generated in the thermoelectric conversion element 2 (S1); and a correction step for correcting the value of the electromotive force acquired in the acquisition step (S1) using a correction formula (1) (S3) if the temperature difference increases due to an increase in the outside air temperature (S2: YES) and correcting the value of the electromotive force acquired in the acquisition step (S1) using a correction formula (2) (S4) if the temperature difference decreases due to an increase in the outside air temperature (S2: NO).　Collection formula (1): V2 = V1 - S × (TA - TA0) Collection formula (2): V2 = V1 + S × (TA - TA0) (In the correction formula (1) and the correction formula (2), V1 represents the value of the electromotive force before correction. V2 represents the value of the electromotive force after correction. S represents the value of the electromotive force per temperature difference of 1°C of the thermoelectric conversion element 2. TA represents the actually measured value of the outside air temperature. TA0 represents a reference value for the outside air temperature.)

To provide a heat sink that is less susceptible to the influence of outside air temperature and can appropriately control the temperature of a battery.SOLUTION: A heat sink 10, which cools or heats a battery, includes an upper plate and a lower plate 10a disposed opposite the upper plate. The heat sink 10 is composed of the upper plate and the lower plate 10a and has a first internal space 10b through which a cooling fluid flows. The lower plate 10a defines a plurality of individually separated branch flow passage portions 16, and the first internal spaces 10b of the plurality of branch flow passage portions 16 are all connected to the second internal space 10c of the main flow passage portion 12 via communication portions 16d and 16e. The plurality of branch flow passage portions 16 are made of resin.SELECTED DRAWING: Figure 4

A switching range control device (40) mounted on a vehicle for switching a switching range by controlling a drive actuation of a motor (10), wherein the switching range control device (40) comprises: a feedback control device (60) which performs feedback control based on an actual angle (Cen) of the motor (10) and a motor speed (Msp) corresponding to a rotational speed of the motor (10); a feedback value setting unit (63) which sets a feedback value of the motor speed based on the motor speed (Msp) to advance an excitation phase; a current sensor (81, 82) which detects a motor current (Im) flowing through the motor (10);and a current correction unit (84) which corrects a target motor speed (Msp*) corresponding to a target motor speed (10) determined based on a demand switching range, wherein: a temperature of a coolant used in the vehicle is defined as a coolant temperature (Hc); a temperature of an oil used in the vehicle is defined as an oil temperature (Ho); an outside air temperature is defined as an outside air temperature (Ha); the motor current (Im), which is set based on a preset temperature (Hs), is defined as a normalized motor current (Im_N);The current correction unit (84) corrects the motor current (Im) to match the normalized motor current (Im_N) when at least one quantity from the coolant temperature (Hc) and the oil temperature (Ho) and the outside air temperature (Ha) coincides with the set temperature (Hs), and the current correction unit (84) estimates a temperature of the motor (10) based on the motor current (Im) and the normalized motor current (Im_N).

A system and method for monitoring a filter state of an HVAC system in a vehicle, the system including: a blower configured to intake and blow vehicle exterior air; an exterior air temperature sensor configured to determine a temperature of the vehicle exterior air intaken by the blower; an evaporator temperature sensor configured to determine a temperature of an evaporator; and a controller configured to: control an operation of the blower; analyze and determine the filter state based on temperature information determined by the exterior air temperature sensor and the evaporator temperature sensor in a state in which the vehicle exterior air intaken by the blower passes through the filter and the evaporator in sequence; and determine a filter replacement time based on the filter state.

The present invention provides a heat pump device that can ensure a high-low pressure difference of the refrigerant circulating in the refrigerant circuit is greater than or equal to a predetermined value. [Solution] In a heating mode in which the water heat exchanger 7 operates as a condenser and the outdoor heat exchanger 15 operates as an evaporator, and when the outside air temperature is set to a first threshold or higher, the second expansion valve 13 controls the degree of superheating of the low-pressure refrigerant drawn into the compressor to a predetermined value, and the first expansion valve 9 controls the high-pressure refrigerant flowing through the water heat exchanger 7 to be set to a predetermined value or higher.