JP2010151380A - Air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner and a control method for the air conditioner, improving COP (coefficient of performance) and reducing power consumption by reducing the pressure of a compressor. <P>SOLUTION: The air conditioner 200 maintaining the temperature and humidity of an indoor space to a predetermined temperature and a predetermined humidity, is provided with: a heat pump 220 producing hot water using heat which a refrigerant obtains by heat exchange with outside air; a plurality of heaters 210 (210a, 210b) heating air using the hot water as a heat source; a humidifier 112 humidifying the air; a blower 114 blowing the air having passed the heaters and humidifier, into the indoor space; and a control section 240 controlling the temperature of the hot water produced by the heat pump, based on the predetermined temperature. The plurality of heaters are juxtaposed in the traveling direction of air, and are supplied with hot water of different temperatures, respectively. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an air conditioner that maintains the temperature and humidity of an indoor space at a predetermined temperature and a predetermined humidity.

  In a clean room, factory production line, etc., an air conditioner (an air conditioner that processes only the outside air and blows air is sometimes referred to as an outside air conditioner) in order to keep the temperature and humidity of the indoor space at a predetermined temperature and a predetermined humidity. (Hereinafter referred to as “air conditioner”). Then, the temperature and humidity of the air (outside air) supplied to the air conditioner are adjusted to a predetermined temperature and a predetermined humidity in the air conditioner, and the adjusted air (processed air) is sent to the indoor space. The temperature and humidity are maintained at a predetermined temperature and a predetermined humidity.

  The air conditioner is provided with a humidifier in order to adjust the humidity of the indoor space to a predetermined humidity. Such humidifiers are roughly classified into vaporizing humidifiers, steam humidifiers, and water spray humidifiers. The vaporization type humidifier performs humidification by evaporating normal temperature water, and is generally configured to evaporate sensible heat of warmed air instead of latent heat of water. The steam humidifier is a method of humidifying using steam, for example, directly spraying steam generated by a boiler. The water spray type humidifier is a method of humidifying by discharging water at normal temperature into fine water droplets. For example, water droplets of several tens of microns (micro order) or less are generated and ejected by spraying or ultrasonic waves.

  However, since steam humidifiers use fire in boilers, there is a risk of fire in facilities that may use organic solvents, such as factory production lines. Therefore, in such a facility, it is necessary to install a boiler outside and to extend the steam pipe from the boiler to the indoor space. Further, the water spray type humidifier has a problem that the efficiency is poor because the humidification efficiency is as low as about 30%. For this reason, vaporizer humidifiers with a wide range of facilities that can be installed are most often introduced into air conditioners.

  As an air conditioner equipped with a vaporizing humidifier, for example, Patent Document 1 discloses a natural vaporizing humidifier that can humidify while cooling the introduced outside air, and the humidity of the indoor space when performing a cooling operation. An air conditioner comprising a control means for operating the humidifier if lower than the value is disclosed. According to this, when the cooling operation is performed at a time when the humidity of the outside air is low as in winter, the outside air is humidified by the natural vaporizing humidifier, so that the outside air is cooled and humidified at the same time. It can be achieved at the same time.

  By the way, the air conditioner is also referred to as a heater (also referred to as “heating coil”) as means for warming air in order to evaporate water in the vaporizing humidifier and to adjust the temperature of the indoor space to a predetermined temperature. .) Is provided. Hot water is supplied to the heater, and the air supplied to the air conditioner is heated using the heat of the hot water as a heat source. There are various devices such as boilers that generate hot water as a heat source, but in recent years heat pumps have become mainstream.

  The heat pump uses a heat exchange cycle. Specifically, a refrigerant circulates inside the heat pump, and the refrigerant absorbs heat in the atmosphere. By compressing the heat-absorbed refrigerant using electric power in the compressor in the heat pump, the refrigerant becomes a high pressure state and becomes a high temperature. And in the heat exchanger in a heat pump, warm water used as the heat source of a heater is produced | generated by heating water with a high temperature refrigerant | coolant.

Therefore, by using a heat pump that uses the heat of the atmosphere as a heat source for generating hot water, compared with the case where a combustion type device such as a boiler is used, about 30% energy saving and about 50% carbon dioxide emission. The amount can be reduced. Thereby, effective use of energy and reduction of the emission amount of carbon dioxide, which is a greenhouse gas, can be promoted.
JP-A-6-337151

  As described above, in an air conditioner, the temperature of air is adjusted to a predetermined temperature using a heater. And in order to perform this adjustment, in the air conditioner, the amount of warm water sent to the heater from a device that generates warm water such as a heat pump and a boiler, that is, the flow rate of warm water is controlled. Thereby, the air conditioner can appropriately adjust the temperature and humidity of the air.

  However, in the method of controlling the flow rate of the warm water, the temperature of the warm water is always constant, and the temperature is set according to the case where the predetermined temperature is the highest. Therefore, there is no problem when the predetermined temperature is high, but when the predetermined temperature is low, high-temperature hot water is wastefully generated and supplied to the heater even though high-temperature hot water is unnecessary. . As a result, when generating high-temperature hot water, energy is wasted in an apparatus that generates such hot water, which is inefficient and not preferable from the viewpoint of energy saving.

  In particular, when a heat pump is used as an apparatus for generating hot water, it is necessary to increase the pressure of the compressor as the temperature of the generated hot water, that is, the tapping temperature of the heat pump increases. Along with this, the COP (Coefficient Of Performance) of the compressor is accelerated. In addition, power consumption for operating the compressor also increases. COP is an index indicating energy efficiency, and is also referred to as an operation coefficient. COP can be calculated as operating capacity (kW) / power consumption (kW).

  Therefore, if the method for controlling the flow rate of the warm water is used, the pressure of the compressor cannot be reduced because all the water is heated in the heat pump until it becomes hot hot water. Therefore, it is impossible to improve COP and reduce power consumption.

  In view of such problems, an object of the present invention is to provide an air conditioner control method capable of improving COP and reducing power consumption by reducing the pressure of a compressor.

  In order to solve the above problems, a typical configuration of an air conditioner according to the present invention is an air conditioner that maintains the temperature and humidity of an indoor space at a predetermined temperature and a predetermined humidity, and the refrigerant is exchanged by heat exchange with outside air. A heat pump that generates hot water using the heat obtained by the heater, a plurality of heaters that heat the air using the hot water as a heat source, a humidifier that humidifies the air, and the air that has passed through the heater and the humidifier And a control unit that controls the temperature of the hot water generated by the heat pump based on a predetermined temperature, and the plurality of heaters are juxtaposed in the air traveling direction, The hot water having different temperatures is supplied.

  In the said structure, a control part controls the temperature of the hot water which a heat pump produces | generates, ie, the tapping temperature of a heat pump, based on the predetermined temperature set to the said air conditioner, and the temperature of external air. For example, according to the control of the control unit, the heat pump generates high-temperature hot water when the predetermined temperature is high and the outside air temperature is low, and low-temperature hot water when the predetermined temperature is low and the outside air temperature is high. In this way, by operating the heat pump so as to give an appropriate amount of heat according to the temperature, it is possible to improve the COP of the heat pump and reduce the power consumption.

  Moreover, in the said structure, a some heater is arranged in parallel by the advancing direction of the air in the said air conditioner, and warm water from which temperature differs each is supplied to a some heater. Thereby, for example, when two heaters are arranged side by side, low-temperature or medium-temperature hot water is supplied to the heater provided on the upstream side in the air traveling direction, and the air is preheated in such a heater. The temperature can be raised to some extent. Then, hot water is supplied to a heater provided on the downstream side, and in this heater, the air preheated by the upstream heater is heated, and the preheated amount is reached, that is, reaches a desired temperature. Therefore, it is possible to supplement the amount of heat for increasing the air temperature. Therefore, the two (plurality) heaters can be a heater that performs preheating and a heater that performs additional heating. Therefore, it is not necessary to completely heat the air in one heater, and the amount of work conventionally provided by one heater can be shared by the two heaters.

  In order to solve the above problems, another configuration of the air conditioner according to the present invention is an air conditioner that maintains the temperature and humidity of an indoor space at a predetermined temperature and a predetermined humidity, wherein the refrigerant is exchanged by heat exchange with outside air. A heat pump that generates hot water using the obtained heat, a heater that heats air using hot water as a heat source, a humidifier that humidifies air, and air that has passed through the heater and humidifier is sent to the indoor space. A blower and a controller that controls the temperature of the hot water generated by the heat pump based on a predetermined temperature, and the heater has a plurality of pipes through which the hot water circulates, and each of the pipes has a different temperature. It is characterized by circulating hot water.

  As described above, the control unit controls the temperature of the hot water generated by the heat pump based on the predetermined temperature set in the air conditioner, that is, the tapping temperature of the heat pump. The COP of the heat pump can be improved and the power consumption can be reduced.

  In the above configuration, the heater has a plurality of pipes through which hot water flows, and hot water having different temperatures flows through the pipes, that is, a plurality of hot waters having different temperatures are supplied to one heater.

  When only high-temperature hot water is supplied to the heater as in the past, the air absorbs the heat from the hot water, but considering the heat transfer efficiency from the hot water to the air, all the heat of the hot water is Can not absorb heat. Therefore, the amount of heat that the air in the high-temperature hot water could not absorb has been exhausted to the outside of the heater as it passes through the high-temperature hot water heater without being used for heating the air. It becomes. Therefore, it is inefficient to supply only hot hot water to the heater.

  Therefore, as in the above configuration, the heater has a plurality of, for example, three pipes, so that the hot water having a low temperature is supplied to the pipe that is the most upstream side in the air traveling direction, and the medium temperature is supplied to the pipe that is the downstream side of the pipe. Hot water can be circulated through the most downstream pipe. Thus, when air passes through the heater, it is gradually heated from the upstream piping to the downstream piping. As a result, heat loss can be reduced as compared with the case where only high-temperature hot water is supplied.

  The predetermined temperature is a value at the dry bulb temperature, and the predetermined humidity is a value at the relative humidity. However, the present invention is not limited to this, and the predetermined temperature may be a value at the wet bulb temperature, or the predetermined humidity may be a value at the absolute humidity.

  It is preferable that a plurality of the above heaters are provided, the plurality of heaters are arranged in parallel in the cross-sectional direction of the air flow path, and the hot water having different temperatures can be supplied to the plurality of heaters.

  By providing a plurality of heaters in the air conditioner as in the above configuration, it is possible to perform finer temperature control. In addition, when a plurality of heaters are arranged in parallel in the air traveling direction, the size of the air conditioner increases in the traveling direction, but by arranging a plurality of heaters in the cross-sectional direction of the air flow path, The size of the air conditioner does not increase in the direction of air travel. Therefore, according to the above configuration, even if a plurality of heaters are provided in the air conditioner, since the size of the air conditioner in the air traveling direction does not change, an increase in the installation area of the air conditioner can be prevented. .

  A plurality of the heat pumps are provided, and hot water having different temperatures may be supplied from different heat pumps among the heat pumps.

  According to the said structure, the warm water from which temperature differs is produced | generated in a different heat pump. Moreover, since each heat pump produces | generates the warm water of a different temperature based on the temperature setting by a control part as mentioned above, it becomes possible to supply the warm water of a different temperature to a heater easily.

  Moreover, when high temperature hot water is produced | generated in one heat pump like the past, COP will fall remarkably. However, when a plurality of heat pumps are provided as in the above configuration, for example, two heat pumps are provided, and hot water is generated with one heat pump, and hot water with low temperature is generated with the other heat pump. The COP of the heat pump is the same as the COP of the conventional heat pump. However, since the heat pump that generates low-temperature hot water can reduce the pressure of the compressor, its COP is improved. Therefore, since the total COP (average value) of the COPs of the two heat pumps is improved as compared with the case where one heat pump is used, the COP as the entire heat pump can be improved.

  Assuming that the above specific numerical values are, for example, COP when the heat pump generates hot water of high temperature (45 ° C) is 3.5, and COP when hot water of low temperature (25 ° C) is generated is 5.5. When high temperature hot water is generated using one heat pump, the COP of the heat pump is naturally 3.5. However, if two heat pumps are used to generate hot hot water with one heat pump, the COP is 3.5, and if cold water is generated with the other heat pump, the COP is 5.5. Then, the total COP of the entire heat pump when two heat pumps are used is calculated to be about 4.27 from the formula “(1 / 3.5 + 1 / 5.5) × 2”. Therefore, it can be seen that COP is improved as compared with the case of using one heat pump. In addition, said numerical value is an illustration as assumption and is not limited to this.

  Said heat pump has a heat storage tank which stores the hot water which the said heat pump produced | generated, and it is good to take hot water from which the temperature differs from a different position of a heat storage tank.

  The hot water produced | generated in the heat pump is supplied above the thermal storage tank which the said heat pump has. For this reason, temperature distribution is generated in the hot water stored in the heat storage tank, and hot water is stored as hot water (or water) as it goes upward and hot water (or water) as it goes down. It becomes. Accordingly, by taking hot water from different positions of the heat storage tank, for example, from above and below, it is possible to obtain hot water (or water) at different temperatures, for example, high temperature and low temperature, using one heat pump. Thereby, it becomes possible to supply warm water of different temperature to a heater, without installing a plurality of heat pumps in the air conditioner.

  The humidifier may be a vaporizing humidifier.

  The vaporizing humidifier performs humidification by evaporating normal temperature water by replacing the sensible heat of air with the latent heat of water. Therefore, since the vaporization type heater does not use fire, there is no fear of fire and high humidification efficiency can be obtained. For this reason, the air conditioner provided with the vaporization type heater can be installed in a facility using an organic solvent such as a factory, and the range of facilities that can be installed is wide. Therefore, a vaporizing humidifier is most suitable as a humidifier to be introduced into an air conditioner.

  Said air is good in the collection | recovery air from outside air and indoor space.

  The air conditioner adjusts the temperature and humidity of air to a predetermined temperature and a predetermined humidity, and sends them to the indoor space. Therefore, the temperature and humidity of the recovered air from the indoor space are extremely close to the predetermined temperature and the predetermined humidity. Therefore, as the air supplied to the air conditioner, by using not only the outside air but also the air collected from the indoor space as in the above configuration, the temperature and humidity of the supplied air are compared with the case where only the outside air is used. The amount of adjustment to the predetermined temperature and predetermined humidity can be reduced, that is, the amount of heat used for heating and humidifying the air can be reduced. Thereby, the tapping temperature of the heat pump can be lowered, and COP can be improved and power consumption can be reduced.

  ADVANTAGE OF THE INVENTION According to this invention, the pressure of a compressor can be reduced by controlling the tapping temperature of a heat pump based on predetermined temperature, and the improvement of COP and the reduction of power consumption can be aimed at.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

  In the following description, after describing the flow of air conditioning in an indoor space using the air conditioner according to the present embodiment, the configuration of the air conditioner will be described in detail.

  FIG. 1 is a diagram illustrating air conditioning in an indoor space using an air conditioner 100 according to the present embodiment (hereinafter referred to as “air conditioner 100”). When supplying only the outside air to the air conditioner 100, first, outside air (OA: Out side Air), that is, air is supplied to the air conditioner 100 from the outside air duct. The supplied air is adjusted in temperature and humidity to a predetermined temperature and predetermined humidity in the air conditioner 100, and is supplied as processing air, that is, supply air (SA) from the supply duct to the indoor space at a predetermined flow rate. The supply air supplied to the indoor space is exhausted to the outside through an exhaust duct as exhaust air (EA) at a predetermined flow rate.

  When supplying the outside air and the recovered air from the indoor space to the air conditioner 100, first, the outside air is supplied from the outside air duct, and the air in the indoor space, that is, the recovered air (RA: Return Air) is supplied from the recovery duct to the air conditioner 100. Is done. The supplied outside air and recovered air are treated air (supply air) in the air conditioner 100 as described above, and are supplied to the indoor space. A part of the supply air supplied to the indoor space is supplied to the air conditioner 100 as recovery air through the recovery duct, and the rest is exhausted outside the room as exhaust air through the exhaust duct.

  As described above, the recovered air is air that has already been adjusted to the predetermined temperature and predetermined humidity by the air conditioner 100 and supplied to the indoor space. Accordingly, since the temperature and humidity of the recovered air are very close to the predetermined temperature and predetermined humidity, only the outside air is supplied to the air conditioner 100 by supplying the recovered air from the indoor space to the air conditioner 100 together with the outside air. The amount of adjustment of the air temperature and humidity to the predetermined temperature and predetermined humidity is reduced. Thereby, the tapping temperature of the heat pump is lowered, and it is possible to improve COP and reduce power consumption.

  The predetermined temperature is a value at the dry bulb temperature, and the predetermined humidity is a value at the relative humidity. However, the present invention is not limited to this, and the predetermined temperature may be a value at the wet bulb temperature. Humidity may be a value in absolute humidity.

  Moreover, also in the air conditioner 200 to be described later, air conditioning in the indoor space can be performed in the same manner as the air conditioner 100 described above.

(First embodiment)
FIG. 2 is a diagram illustrating a configuration of the air conditioner 100 according to the first embodiment. In FIG. 2, a thick white arrow indicates the flow of air, a thin white arrow indicates the flow of water or warm water, a black solid line arrow indicates the flow of refrigerant, and a black broken line indicates the connection relationship of the control units.

  As shown in FIG. 2, the air conditioner 100 includes a sensor 102, a pre-filter 104, a medium performance filter 106, a cooler 108, a heater 110, a humidifier 112, a blower 114, a heat pump 120, And a control unit 140.

  The sensor 102a detects the temperature and humidity of the air supplied to the air conditioner 100. The sensor 102b detects the temperature and humidity of the air supplied from the air conditioner 100 to the room. Based on the detected temperature and humidity, the control unit 140 described later controls the operation of the air conditioner 100.

  The pre-filter 104 is a filter provided on the most upstream side of the air flow in the air conditioner 100, and captures dust having a large particle size, that is, coarse dust. Thereby, coarse dust contained in the air supplied to the air conditioner 100 can be removed from the air.

  The medium performance filter 106 is a filter provided on the downstream side of the pre-filter 104, and captures small dust, that is, fine dust that has passed through the pre-filter 104. Thereby, it is possible to remove fine dust contained in the air supplied to the air conditioner 100 from the air.

  The cooler 108 is supplied with cold water through a cold water pipe, and cools the air using the cold water. Thereby, the temperature of the air supplied to the air conditioner 100 can be lowered, and the temperature of the air can be adjusted to a predetermined temperature. Further, by reducing the temperature of the air, it is possible to reduce the absolute humidity of the air, dehumidify the air, and adjust the humidity of the air to a predetermined humidity.

  The heater 110 is supplied with warm water from a heat pump 120 described later through a warm water pipe, and heats the air using the warm water as a heat source. Thereby, the temperature of the air supplied to the air conditioner 100 can be raised, and the temperature of the air can be adjusted to a predetermined temperature. Moreover, since the heat (sensible heat) contained in the air increases by increasing the temperature of the air, the humidifying water can be evaporated with high efficiency when the air passes through the humidifier 112 described later. Humidification efficiency is improved.

  In the first embodiment, the heater 110 has a plurality of hot water pipes that are pipes through which hot water flows. The plurality of hot water pipes are constituted by hot water pipes 110a, 110b, 110c, and hot water having different temperatures is supplied from the heat pump 120 to the hot water pipes 110a, 110b, 110c. The temperature of the circulating hot water becomes higher in the order of the hot water pipes 110a, 110b, and 110c. Therefore, the hot water pipe 110a that is the most upstream side in the air traveling direction has low temperature hot water, the hot water pipe 110b that is downstream of the hot water pipe 110a, the medium temperature hot water, and the hot water pipe 110c that is the most downstream side. Hot water will circulate in the area.

  With the above configuration, it is possible to gradually heat the air passing through the heater 110 from the upstream hot water pipe 110a to the downstream hot water pipe 110c using a plurality of temperature hot water in one heater 110. . Therefore, when only high-temperature hot water is supplied to the heater 110 as in the prior art, the heat that could not be absorbed by the air in the high-temperature hot water is heated with the passage of the high-temperature hot water heater 110. Since the heat loss is increased because the heat is discharged to the outside of the vessel 110, it is possible to reduce the heat loss by supplying low-temperature and medium-temperature hot water to the hot water pipes 110a and 110b as in this embodiment.

  In the present embodiment, the air conditioner 100 includes one heater 110. However, the present invention is not limited to this, and two or more (a plurality of) heaters 110 may be provided. The hot water 110 having different temperatures may be supplied to the plurality of heaters 110. As a result, finer temperature control can be performed.

  Further, when a plurality of heaters 110 are provided, the plurality of heaters 110 may be arranged in parallel in the cross-sectional direction of the air flow path. According to this, even if a plurality of heaters 110 are provided in the air conditioner 100, the size of the air conditioner 100 does not increase in the air traveling direction, thereby preventing an increase in the installation area of the air conditioner 100. be able to.

  Note that the temperature of the hot water supplied to the heater 110 is controlled by the control unit 140 described later. The control of the temperature of the hot water by the control unit 140 will be described in detail later.

  The humidifier 112 is supplied with humidifying water through a humidifying water pipe, and the air supplied to the air conditioner 100 passes through the humidifier 112 so that the sensible heat of the air is replaced with the latent heat of the water to evaporate the humidifying water. , Humidify the air. In the present embodiment, a vaporizing humidifier is used as the humidifier 112. Thereby, the range of facilities where the air conditioner 100 can be installed can be expanded.

  In this embodiment, a vaporizing humidifier is illustrated as the humidifier 112, but the humidifier is not limited to this, and a humidifier using a method other than the vaporizing method such as a steam humidifier or a water spray humidifier is used. It is also possible to use it.

  The blower 114 sends air that has been cooled by the cooler 108 or heated by the heater 110 and passed through the humidifier 112, that is, air that has reached a predetermined temperature and humidity in the air conditioner 100 (process air) to the indoor space. .

  In the heat pump 120, a refrigerant circulates inside, and the refrigerant generates hot water using heat obtained by heat exchange with the outside air. The heat pump 120 includes an evaporator 122, a compressor 124, a radiator 126, an expansion unit 128, a pump 130, and a heat storage tank 132.

  The evaporator 122 performs heat exchange between the refrigerant circulating in the heat pump 120 and the outside air. Thereby, a refrigerant | coolant absorbs the heat of external air (in the air | atmosphere), and can obtain the heat | fever for heating water in the heat radiator 126 mentioned later.

  The compressor 124 compresses the refrigerant that has absorbed the heat of the outside air using electric power. Thereby, a refrigerant | coolant will be in a high temperature / high pressure state, and it will become possible to heat water in the heat radiator 126 mentioned later using this high temperature refrigerant | coolant.

  As the temperature of the hot water generated by the heat pump 120, that is, the tapping temperature of the heat pump 120 increases, the amount of heat required to make the water hot water increases. Therefore, in order to obtain a large amount of heat from the refrigerant, the pressure of the compressor 124 must be increased. As a result, the COP of the compressor 124 and thus the COP of the heat pump 120 are reduced at an accelerated rate, and the power consumption for operating the compressor 124 is also increased.

  The radiator 126 performs heat exchange between the refrigerant having a high temperature due to the compression in the compressor 124 and water supplied from the heat storage tank 132 described later. Thereby, water can be heated using the heat | fever of a refrigerant | coolant and hot water can be produced | generated.

  The expansion means 128 expands and cools the refrigerant after heating the water in the radiator 126 to a reduced pressure state. Thereby, it becomes possible for this refrigerant | coolant to absorb the heat of outside air again, and a refrigerant | coolant can be reused. In this embodiment, an expansion valve is used as the expansion means 128. However, the present invention is not limited to this, and any expansion valve can be used as long as the refrigerant can be decompressed and cooled.

  The pump 130 circulates water from the heat storage tank 132 to the radiator 126.

  The heat storage tank 132 stores hot water generated by heat exchange with the refrigerant in the radiator 126. And the hot water stored hot water is supplied to the heater 110 through the hot water piping 110a, 110b, 110c.

  In the present embodiment, the heat storage tank 132 includes water intake ports 132 a, 132 b, and 132 c at different positions (heights) in the vertical direction of the heat storage tank 132. The intake port 132a is connected to the hot water pipe 110a, the intake port 132b is connected to the hot water pipe 110b, and the intake port 132c is connected to the hot water pipe 110c.

  Since the hot water generated in the heat pump 120 is supplied above the heat storage tank 132, there is a temperature distribution in the hot water stored in the heat storage tank 132. As it is, hot water (or water) at a low temperature is stored (or stored). Therefore, according to the above configuration, the hot water of low-temperature hot water (or water) stored in the heat storage tank 132 is heated from the water intake port 132a through the hot water piping 110a, and the medium temperature hot water is supplied from the water intake port 132b through the hot water piping 110b. Hot water can be supplied to each heater 110 from the water intake port 132c through the hot water pipe 110c. Thus, different temperatures, for example, high temperature, medium temperature, and low temperature hot water (or water) can be obtained using one heat pump 120, and hot water having different temperatures can be obtained without installing a plurality of heat pumps in the air conditioner 100. Can be supplied to the heater 110.

  Note that the positions of the water intakes 132a, 132b, and 132c and the number of water intakes shown in FIG. 2 are merely examples, and the present invention is not limited thereto. For example, the number of water intakes may be two, and the installation position of the water intakes may be moved up and down in the heat storage tank 132.

  As described above, the heat pump 120 having the above-described configuration allows the heater 110 to heat the air using the hot water generated by the heat pump 120 as a heat source.

  Further, by using the heat pump 120 as a device for generating hot water used as a heat source in the heater 110, compared with the case where a combustion type device such as a boiler is used, energy saving of about 30% and about 50% of dioxide dioxide are obtained. It is possible to reduce carbon emissions. Therefore, effective use of energy and reduction of greenhouse gas emissions can be promoted.

  The control unit 140 controls the operation of the air conditioner 100 based on the air temperature and humidity detected by the sensor 102. Moreover, in this embodiment, the control part 140 controls the temperature of the warm water (heat pump hot water temperature) which the heat pump 120 produces | generates based on the predetermined temperature of the indoor space set to the air conditioner 100. FIG. Thereby, the heat pump 120 can generate hot water having an appropriate temperature with respect to the predetermined temperature in accordance with the control of the control unit 140. Therefore, when the predetermined temperature is low, the pressure of the compressor 124 can be reduced, the COP of the heat pump 120 can be improved, and the power consumption can be reduced.

  Below, control of the tapping temperature of the heat pump 120 based on a predetermined temperature by the control unit 140 will be described using an air diagram. In the following description, “temperature” means dry bulb temperature and “humidity” means relative humidity unless otherwise specified.

  FIG. 3 is an air diagram showing changes in temperature and humidity when the predetermined temperature is 20 ° C. and the predetermined humidity is 80%. In FIG. 3, the point at which the predetermined temperature (20 ° C.) and the predetermined humidity (80%) are reached is S1, and the point illustrating the case where the temperature of the air supplied to the air conditioner 100 is higher than the predetermined temperature, such as summer, is A1, winter The point which illustrates the case where the temperature of the air supplied to the air conditioner 100 is lower than a predetermined temperature is set to B1. In addition, the temperature and humidity in S1, A1, and B1 are examples, and are not limited thereto.

  As shown in FIG. 3, the case where the temperature of the air supplied to the air conditioner 100 is higher than a predetermined temperature, such as in summer, for example, the case where the temperature of the supplied air is 30 ° C. and the humidity is 70% (A1) will be described. . In order to adjust the temperature and humidity to the predetermined temperature and the predetermined humidity, that is, to reach S1 from A1, air supplied to the air conditioner 100 is first cooled in the cooler 108. In this cooling, the temperature of the air is reduced to 24 ° C. At this time, since the water vapor amount (absolute humidity) of air does not change, the water vapor amount in the air reaches the saturated water vapor amount at 24 ° C., and the air humidity becomes 100% relative humidity.

  And by further cooling air, the temperature of air falls along the curve (saturated water vapor curve) of 100% relative humidity. As the temperature drops, the amount of water vapor that exceeds the amount of saturated water vapor in the air, that is, water vapor that can no longer be saturated in the air becomes liquid, condensation occurs, and the absolute humidity of the air decreases (the amount of water vapor in the air decreases). Decrease). As a result, the amount of water vapor (absolute humidity) in the air is adjusted, and the cooling is terminated when the absolute humidity of the air becomes substantially equal to the absolute humidity of the air having a predetermined temperature and a predetermined humidity. As a result, due to the cooling in the cooler 108, the temperature of the air is about 17 ° C. and the humidity is 100%.

  Next, the cooled air is heated in the heater 110. Thereby, the temperature of air rises and temperature becomes predetermined temperature (20 degreeC). At this time, since the water vapor amount (absolute humidity) of air does not change, the humidity of air changes from 100% relative humidity at about 17 ° C. to 80% relative humidity (predetermined humidity) at a predetermined temperature (20 ° C.). In this way, the temperature (30 ° C.) and humidity (70%) of the air supplied to the air conditioner 100 are adjusted to the predetermined temperature (20 ° C.) and the predetermined humidity (80%).

  Further, a case where the temperature of the air supplied to the air conditioner 100 is lower than a predetermined temperature, such as in winter, for example, the case where the temperature of the supplied air is 10 ° C. and the humidity is 30% (B1) will be described. In order to adjust the temperature and humidity to a predetermined temperature and a predetermined humidity, that is, to reach S1 from B1, air supplied to the air conditioner 100 is first heated in the heater 110. In this heating, the temperature of the air is raised to about 44 ° C. At this time, since the amount of water vapor in the air does not change, the humidity changes from 30% relative humidity at 10 ° C. to about 5% relative humidity at about 44 ° C.

  In the above heating, the air is heated until the temperature reaches about 44 ° C., which is significantly higher than the predetermined temperature (20 ° C.). This is because in the humidification by the humidifier 112 performed after the heating by the heater 110, when the air passes through the humidifier 112 and evaporates the humidifying water supplied to the humidifier 112, the sensible heat of the air becomes the humidifying water. This is because the heat of the air is taken away by the humidifying water and the temperature of the air is lowered. In other words, by heating the air temperature (10 ° C.) to a temperature (about 44 ° C.) significantly higher than the predetermined temperature (20 ° C.), the air temperature after humidification by the humidifier 112 is set to the predetermined temperature. Because it can be. Therefore, when humidification is performed by the humidifier 112, the temperature of the air must be heated to a temperature higher than a predetermined temperature in consideration of heat loss of air when passing through the humidifier 112.

  After the air is heated by the heater 110, the heated air is humidified by passing through the humidifier 112. Thereby, the sensible heat of air is used for evaporation of humidification water, the temperature of air falls, and the amount of water vapor of air increases (absolute humidity rises). As a result, the air temperature decreases from about 44 ° C. to a predetermined temperature (20 ° C.), and the air humidity changes from about 5% relative humidity at about 44 ° C. to 80% relative humidity at the predetermined temperature (20 ° C.). . In this way, the temperature (10 ° C.) and humidity (30%) of the air supplied to the air conditioner 100 are adjusted to the predetermined temperature (20 ° C.) and the predetermined humidity (80%).

  FIG. 4 is an air diagram showing changes in temperature and humidity when the predetermined temperature is 15 ° C. and the predetermined humidity is 80%. In FIG. 4, the point at which the predetermined temperature (15 ° C.) and the predetermined humidity (80%) are reached is S2, and A1 and B1 are the same conditions as A1 and B1 in FIG. In addition, the temperature and humidity in S2, A1, and B1 are examples, and are not limited thereto.

  As shown in FIG. 4, the case where the temperature of the air supplied to the air conditioner is higher than a predetermined temperature such as in summer, for example, the case where the temperature of the supplied air is 30 ° C. and the humidity is 70% (A1) will be described. In order to adjust the temperature and humidity to the predetermined temperature and the predetermined humidity (reaching from A1 to S2), first, the supplied air is cooled in the cooler 108, and the temperature of the air is lowered to 24 ° C. At this time, since the water vapor amount (absolute humidity) of the air does not change, the water vapor amount in the air reaches the saturated water vapor amount at 24 ° C. (the air has a relative humidity of 100%).

  As the air continues to cool, the air temperature decreases along a 100% relative humidity curve (saturated water vapor curve). As the temperature drops, the water vapor that can no longer be saturated in the air becomes liquid, causing condensation and reducing the amount of water vapor in the air (decreasing the absolute humidity of the air). Then, when the absolute humidity of the air becomes substantially equal to the absolute humidity of the air having the predetermined temperature and the predetermined humidity, the cooling is finished. As a result, the amount of water vapor (absolute humidity) in the air is adjusted, and the air has a temperature of about 12 ° C. and a humidity of 100%.

  Next, the air after cooling is heated in the heater 110 so that the temperature of the air becomes a predetermined temperature (20 ° C.). At this time, since the amount of water vapor (absolute humidity) of air does not change, the humidity of air changes from 100% relative humidity at about 12 ° C. to 80% relative humidity (predetermined humidity) at a predetermined temperature (20 ° C.). In this way, the temperature (30 ° C.) and humidity (70%) of the air supplied to the air conditioner 100 are adjusted to the predetermined temperature (15 ° C.) and the predetermined humidity (80%).

  Further, a case where the temperature of the air supplied to the air conditioner is lower than a predetermined temperature, such as in winter, for example, the case where the temperature of the supplied air is 10 ° C. and the humidity is 30% (B1) will be described. In order to adjust the temperature and humidity to a predetermined temperature and a predetermined humidity (from S1 to B2), first, the air supplied to the air conditioner 100 is heated in the heater 110, and the temperature of the air is increased to about 30 ° C. Raise. At this time, since the amount of water vapor in the air does not change, the humidity of the air is changed from 30% relative humidity at 10 ° C. to about 10% relative humidity at about 30 ° C.

  In this heating, the heating was performed until the temperature of the air reached about 30 ° C., which is significantly higher than the predetermined temperature (15 ° C.), after the heating by the heater 110 as described in detail in the explanation of FIG. In the humidification performed by the humidifier 112, the heat loss of air when passing through the humidifier 112 is taken into consideration.

  Next, the heated air is humidified by passing through the humidifier 112. Thereby, the sensible heat of air is used for evaporation of humidification water, the temperature of air falls, and the amount of water vapor of air increases. As a result, the air temperature decreases from about 30 ° C. to 15 ° C. (predetermined temperature), and the air humidity ranges from about 10% relative humidity at about 30 ° C. to 80% relative humidity at the predetermined temperature (15 ° C.). Become. In this way, the temperature (10 ° C.) and humidity (30%) of the air supplied to the air conditioner 100 are adjusted to the predetermined temperature (15 ° C.) and the predetermined humidity (80%).

  As described above, when the predetermined temperature is 20 ° C., the predetermined humidity is 80%, the temperature of the supplied air is 10 ° C., and the humidity is 30%, the air temperature and humidity are adjusted to the predetermined temperature and the predetermined humidity. In order to do (from S1 to B1), the air must be heated until the air temperature reaches about 44 ° C. (heating temperature). Therefore, in consideration of heat loss in heat conduction from the heater 110 to water, conventionally, the heat pump 120 generates hot water having a temperature about 5 to 10 ° C. higher than the heating temperature (about 44 ° C.), that is, about 49 to 54 ° C. , Was supplied to the heater 110.

  When the predetermined temperature is 15 ° C., the predetermined humidity is 80%, the temperature of the supplied air is 10 ° C. and the humidity is 30%, the air temperature and humidity are adjusted to the predetermined temperature and the predetermined humidity (from B1). In order to reach (S2), heating may be performed until the temperature of the air reaches approximately 30 ° C. (heating temperature). Therefore, conventionally, in the heat pump 120, hot water having the same temperature as that required when the predetermined temperature is high, for example, hot water having a temperature of about 49 to 54 ° C. is generated as in the case where the predetermined temperature is 20 ° C. By reducing (controlling) the supply amount to the air, the heater 110 was heated so that the temperature of the air was about 30 ° C.

  However, since the heating temperature when the predetermined temperature is 15 ° C. is about 30 ° C., the temperature of the required hot water is about 35 to 45 ° C. even if heat loss in heat conduction is taken into consideration. Therefore, as described above, in the conventional method in which the temperature of the hot water generated by the heat pump 120 is constant at the temperature required when the predetermined temperature is high and the flow rate of the hot water to the heater 110 is controlled, the predetermined temperature is When the temperature is low, excessively heated hot water is supplied to the heater 110. Then, the heat pump 120 generates wasteful hot water (heats water unnecessarily), and the compressor 124 wastefully uses power to generate hot hot water. Will be raised. Moreover, COP will also fall remarkably by the pressure rise of the compressor 124. FIG.

  Therefore, the control unit 140 according to the present embodiment controls the temperature of the hot water generated by the heat pump 120 (the hot water temperature) based on the predetermined temperature set in the air conditioner 100. As a result, the heat pump 120 can generate high-temperature hot water when the predetermined temperature is high and low-temperature hot water when the predetermined temperature is low according to the control of the control unit 140. For example, when the predetermined temperature is 20 ° C., about 5 to 10 ° C. higher than about 44 ° C. (heating temperature), that is, about 49 to 54 ° C. hot water is used, and when the predetermined temperature is 15 ° C., about 30 The controller 140 controls the hot water temperature of the heat pump 120 so as to generate hot water having a temperature about 5 to 10 ° C. higher than the temperature (heating temperature), that is, about 35 to 45 ° C.

  For example, when the predetermined temperature is 15 ° C., the hot water generated by the heat pump 120 by the control of the control unit 140 is stored in the heat storage tank 132, and the hottest water, that is, hot water of about 35 to 45 ° C. is the uppermost. The water is supplied from the water intake port 132c to the heater 110 through the hot water pipe 110c. Medium temperature warm water having a temperature lower than about 35 to 45 ° C. is supplied to the heater 110 from the intermediate water intake port 132b through the warm water pipe 110b. And the low temperature warm water whose temperature is lower than medium temperature warm water is supplied to the heater 110 from the lower intake port 132a through the warm water piping 110a. This makes it possible to reduce heat that has not been transferred from the hot water to the air, that is, heat loss.

  As described above, according to the air conditioner 100 according to the first embodiment, the hot water temperature of the heat pump 120 is lowered when the predetermined temperature is low, so the compressor 124 for compressing the refrigerant circulating in the heat pump 120. The pressure can be reduced. Thereby, the COP of the heat pump 120 can be improved and the power consumption can be reduced.

  In addition, the heater 110 has a plurality of pipes (hot water pipes 110a, 110b, 110c), and by supplying hot water having different temperatures to the pipes, the single heater 110 uses the hot water having a plurality of temperatures. Can be heated. Thereby, it becomes possible to reduce heat loss compared with the case where only the hot water of high temperature is supplied to the heater 110 like the past.

  Furthermore, by providing a plurality of water intakes (water intakes 132a, 132b, 132c) in the heat storage tank 132 of the heat pump 120 and connecting the water intakes to a plurality of pipes (hot water pipes 110a, 110b, 110c) of the heater 110. , Hot water having different temperatures can be supplied from one heat pump 120 to the heater 110.

  In the first embodiment, a plurality of hot waters generated by one heat pump 120 and stored in the heat storage tank 132 are taken from a plurality of water intakes (water intakes 132a, 132b, 132c) of the heat storage tank 132. Although hot water having different temperatures to be circulated through the pipes (hot water pipes 110a, 110b, 110c) is obtained, the present invention is not limited to this. For example, it is also possible to provide a plurality of heat pumps 120 in the air conditioner 100 and supply hot water from the plurality of heat pumps 120 to each of the plurality of pipes as in a second embodiment described later.

(Second Embodiment)
FIG. 5 is a diagram illustrating a configuration of an air conditioner 200 according to the second embodiment. As in FIG. 2, in FIG. 5, the thick white arrows indicate the flow of air, the thin white arrows indicate the flow of water or warm water, the black solid line arrows indicate the flow of refrigerant, and the black broken lines indicate the connection relationship of the control units. Indicates. Moreover, in the following description, about the element and structure similar to 1st Embodiment, description is abbreviate | omitted in order to avoid duplication.

  As shown in FIG. 5, the air conditioner 200 includes a sensor 102, a pre-filter 104, a medium performance filter 106, a cooler 108, a heater 210 (210a, 210b), a humidifier 112, and a blower 114. The heat pump 220 (220a, 220b) and the control unit 240 are included.

  The air conditioner 200 according to the second embodiment includes a plurality of heaters 210 (210a and 210b). The plurality of heaters 210a and 210b are juxtaposed in the air traveling direction, the heater 210a is provided on the upstream side of the air flow path, and the heater 210b is provided on the downstream side of the air flow path. The heater 210a is supplied with hot water from a heat pump 220a, which will be described later, through a hot water pipe 212a, and the heater 210b is supplied with heat water from a heat pump 220b, which will be described later, through a hot water pipe 212b. Thereby, the temperature of the air supplied to the air conditioner 200 can be raised, and the temperature of the air can be adjusted to a predetermined temperature. Moreover, since the heat (sensible heat) contained in the air increases by increasing the temperature of the air, the humidifying water can be evaporated with high efficiency when the air passes through the humidifier 112 described later. Humidification efficiency is improved.

  Hot water having different temperatures is supplied to the heater 210a and the heater 210b. Thereby, low temperature or medium temperature hot water is supplied to the heater 210a provided on the upstream side in the air traveling direction, and the air is preheated in the heater 210a, so that the temperature of the air can be raised to some extent. Then, high-temperature hot water is supplied to the heater 210b provided on the downstream side, and the heater 210b heats the air after preheating by the heater 210a, compensates for the amount of heat shortage due to preheating, and adjusts the temperature of the air. It can be further raised. Therefore, the plurality of heaters 210 can be a heater 210a that performs preheating and a heater 210b that performs additional heating, and the work that was conventionally provided by one heater 210 is shared by two heaters. Can be made.

  In the above description, the heater 210a is supplied with low-temperature or medium-temperature hot water, and the heater 210b is supplied with high-temperature hot water. However, the present invention is not limited to this, and the heater 210a and the heater 210b are different. It is sufficient that hot water having a temperature is supplied. Preferably, the hot water supplied to the heater 210b has a higher temperature than the hot water supplied to the heater 210a. This is because it is possible to preheat the air in the heater 210a and perform additional heating of the air in the heater 210b. Therefore, for example, low temperature hot water may be supplied to the heater 210a, and medium temperature hot water may be supplied to the heater 210b.

  The air conditioner 200 according to the second embodiment includes a plurality of heat pumps 220 (220a and 220b). The heat pump 220a supplies the generated hot water to the heater 210a through the hot water pipe 212a, and the heat pump 220b supplies the generated hot water to the heater 210b through the hot water pipe 212b.

  In the heat pump 220a, a refrigerant circulates inside, and the refrigerant generates hot water using heat obtained by heat exchange with the outside air. The heat pump 220 a includes an evaporator 122, a compressor 124, a radiator 126, expansion means 128, and a pump 230.

  Pump 230 circulates water (or hot water) from radiator 126 to heating coils 210a and 210b.

  In addition, although the heat pump 220 (220a and 220b) has a slightly different configuration from the heat pump 120 according to the first embodiment, its function is substantially the same, and thus detailed description other than the configuration is omitted. Further, since the configuration and function of the heat pump 220b are the same as those of the heat pump 220a, the description of the heat pump 220b is used as the description of the heat pump 220a, and the detailed description and illustration are omitted.

  The heat pump 220a and the heat pump 220b generate hot water having different temperatures. Here, as described in the description of the heater 210, the heater 210a provided on the upstream side of the air flow path in the air conditioner 200 performs preheating of the air using low-temperature or medium-temperature hot water as a heat source. The heater 210b provided on the downstream side performs additional heating of air using high-temperature hot water as a heat source, so the heat pump 220a generates low-temperature or medium-temperature hot water, and the heat pump 220b generates high-temperature hot water.

  As in the above configuration, the air conditioner 200 includes two (plural) heat pumps 220, and generates low-temperature hot water using the heat pump 220a and high-temperature hot water using the heat pump 220b. Compared with the case where high-temperature hot water is generated, COP can be improved.

  Specifically, since the heat pump 220b generates high-temperature hot water, its COP is similar to the conventional one, but since the heat pump 220a generates low-temperature hot water, the pressure of the compressor 124 can be reduced. COP is improved as compared with the prior art. Therefore, the COP of the heat pump 220a and the average COP (total COP) of the heat pump 220b are improved as compared with the case where high temperature hot water is generated in one heat pump 220.

  In the above description, the heat pump 220a generates low-temperature or medium-temperature hot water, and the heat pump 220b generates high-temperature hot water. However, the present invention is not limited to this, and the heat pump 220 is required for heating the air in the heater 210. What is necessary is just to produce | generate warm water of the temperature which is. Moreover, since the temperature of the hot water which the heat pump 220 produces | generates is controlled by the control part 240 mentioned later, the heat pump 220 should just produce | generate the hot water of the temperature which the control part 240 determined according to the control.

  The controller 240 controls the operation of the air conditioner 200 based on the air temperature and humidity detected by the sensor 102. Moreover, in 2nd Embodiment, the control part 240 controls the temperature of the hot water which the heat pumps 220a and 220b generate | occur | produce (the tapping temperature of the heat pumps 220a and 220b) based on the predetermined temperature of the indoor space set to the air conditioner 200. To do. Thus, the heat pumps 220a and 220b can generate hot water having an appropriate temperature with respect to the predetermined temperature in accordance with the control of the control unit 240. Therefore, when the predetermined temperature is low, the pressure of the compressor 124 can be reduced, the COP of the heat pump 220 can be improved, and the power consumption can be reduced.

  Below, control of the tapping temperature of the heat pump 220 based on a predetermined temperature by the control unit 240 will be described using an air diagram. In the following description, “temperature” means dry bulb temperature and “humidity” means relative humidity unless otherwise specified.

  FIG. 6 is an air diagram showing changes in air temperature and humidity in the air conditioner 200 according to the second embodiment. In FIG. 6, S1, S2, A1, and B1 have the same conditions as the points in FIGS. Moreover, the temperature and humidity in S1, S2, A1, and B1 are examples, and are not limited thereto. In FIG. 6, a broken line is a locus of changes in air temperature and humidity when the predetermined temperature is high, and a solid line is a locus of changes in air temperature and humidity when the predetermined temperature is low.

  Here, when the temperature of the air supplied to the air conditioner 200 is higher than a predetermined temperature, such as in summer, for example, when the temperature of the supplied air is 30 ° C. and the humidity is 70% (A1), the predetermined temperature and the predetermined humidity ( In the adjustment to S1 or S2), the air conditioner 100 according to the first embodiment described with reference to FIGS. 3 and 4 and the air conditioner 200 according to the second embodiment differ in the number of heaters used. Substantially the operation (control) is almost the same. That is, in the air conditioner 100 according to the first embodiment, one heater 110 is used, and in the air conditioner 200 according to the second embodiment, two heaters 210 (210a and 210b) are used. Do. Therefore, the adjustment from A1 to S1 or S2 in FIGS. 3 and 4 is described as the adjustment from A1 to S1 or S2 in FIG. 6, and detailed description thereof is omitted here.

  In the adjustment from A1 to S1 or S2 in the air conditioner 200, the heating after cooling the air may be performed using either the heater 210a or the heater 210b. This is because the temperature of the hot water required for heating the air is 25 ° C. to 30 ° C. when the temperature is 20 ° C., and 20 ° C. to 35 ° C. when the temperature is 15 ° C. This is because since the temperature is low, the temperature of the hot pump 220 can be lowered and the COP can be sufficiently improved.

  When the temperature of the air supplied to the air conditioner 200 is lower than a predetermined temperature, such as in winter, for example, when the temperature of the supplied air is 10 ° C. and the humidity is 30% (B1), adjustment to the predetermined temperature and the predetermined humidity explain.

  When the predetermined temperature is set to 20 ° C. and the predetermined humidity is set to 80%, the temperature of the air supplied to the air conditioner 200 is 10 ° C. and the humidity is 30%, that is, the predetermined temperature is high, and the temperature of the supplied air Is lower than the predetermined temperature, the temperature and humidity of the air are adjusted, and B1 is reached from S1. In this case, in humidification after heating by the heater 210 (210a, 210b), in order to adjust the temperature and humidity of the air to the predetermined temperature and the predetermined humidity in consideration of the heat loss of the air when passing through the humidifier 112 Must be heated until the air temperature is about 44 ° C. (heating temperature). Therefore, the control unit first sets the temperature of the hot pump 220b to about 49 to 54 ° C, and sets the temperature of the hot pump 220a to a temperature lower than the temperature of the heat pump 220b, for example 35 to 40 ° C. The heat pumps 220a and 220b generate hot water having a set temperature, and supply the hot water to the heaters 210a and 210b.

  Next, the air supplied to the air conditioner 200 is preheated in a heater 210 a provided on the upstream side of the air flow path of the air conditioner 200. By this preheating, the temperature of the air rises along the broken line and reaches about 30 ° C. When the preheated air is additionally heated in the heater 210b, the temperature of the air further increases along the broken line and reaches 44 ° C. At this time, since the amount of water vapor in the air does not change, the humidity changes from 30% relative humidity at 10 ° C. to about 5% relative humidity at about 44 ° C.

  The air heated by the heater 210b is humidified by passing through the humidifier 112. Thereby, the sensible heat of air is used for evaporation of humidification water, the temperature of air falls, and the amount of water vapor of air increases (absolute humidity rises). As a result, the air temperature decreases from about 44 ° C. to a predetermined temperature (20 ° C.), and the air humidity changes from about 5% relative humidity at about 44 ° C. to 80% relative humidity at the predetermined temperature (20 ° C.). .

  When the predetermined temperature is set to 15 ° C. and the predetermined humidity is set to 80%, the temperature of the air supplied to the air conditioner 200 is 10 ° C. and the humidity is 30%, that is, the predetermined temperature is low, and the temperature of the supplied air If the temperature is lower than the predetermined temperature, the temperature and humidity of the air are adjusted to reach S2 from B1. In this case, in consideration of heat loss of air when passing through the humidifier 112, the air must be heated until the temperature of the air reaches about 30 ° C. (heating temperature). Therefore, the controller first sets the temperature of the hot pump 220b to about 35-40 ° C., and sets the temperature of the hot pump 220a to a temperature lower than the temperature of the heat pump 220b, for example 25-30 ° C. The heat pumps 220a and 220b generate hot water having a set temperature, and supply the hot water to the heaters 210a and 210b.

  As described above, when the air supplied to the air conditioner 200 is first preheated in the heater 210a, the temperature of the air rises along a solid line and becomes about 20 ° C. When the preheated air is additionally heated in the heater 210b, the temperature of the air further increases along the solid line and reaches 30 ° C. At this time, the humidity of the air is changed from 30% relative humidity at 10 ° C. to about 10% relative humidity at about 30 ° C. Next, when the heated air passes through the humidifier 112 and is humidified, the temperature of the air decreases from about 30 ° C. to 15 ° C. (predetermined temperature), and the humidity of the air is about 10% relative humidity at about 30 ° C. % To a relative humidity of 80% at a predetermined temperature (15 ° C.).

  Therefore, as in the first embodiment, since the control unit 240 controls the tapping temperature of the heat pumps 220a and 220b based on the predetermined temperature, the COP of the heat pump 220 can be improved particularly when the predetermined temperature is low. Further, as described above, the hot water temperature of the two heat pumps 220 is controlled by the control unit, and the hot water temperature of one heat pump 220b is set to a temperature necessary for the air to reach the heating temperature, that is, a high temperature, and the other heat pump 220a. Since the total COP of the heat pump 220 is improved by making the temperature of the hot water lower than that of the heat pump 220b, the COP of the heat pump 220 as a whole can be further improved.

  As described above, even with the air conditioner 200 according to the second embodiment, the hot water temperature of the heat pump 220 when the predetermined temperature is low by the control of the control unit 240 is reduced, and the pressure of the compressor 124 is reduced. The COP of the heat pump 220 can be improved and the power consumption can be reduced.

  The air conditioner 200 includes a plurality of heaters 210 (210a, 210b) and a plurality of heat pumps 220 (220a, 220b), and can supply hot water having different temperatures from the plurality of heat pumps 220 to the plurality of heaters 210, respectively. From the above, the temperature of the hot water of the heat pump 220b can be made high, the temperature of the hot water of the other heat pump 220a can be made lower than the temperature of the hot water of the heat pump 220b, and the total COP of the heat pump 220 can be improved. The COP can be further improved.

  In the second embodiment, the air conditioner 200 is provided with a plurality of heat pumps 220 (220a, 220b) and heated by supplying hot water from the plurality of heat pumps 220 to the plurality of heaters 210 (210a, 210b), respectively. The vessel 210 obtains hot water having different temperatures, but is not limited to this. For example, as in the first embodiment described above, a heat storage tank is provided in the heat pump 220, and hot water generated by one heat pump 220 and stored in the heat storage tank is taken from a plurality of water intakes of the heat storage tank, It is also possible to distribute hot water having different temperatures to the plurality of heaters 210.

  Furthermore, although the air conditioner 200 according to the second embodiment includes the two heaters 210 and the two heat pumps 220, the number of the heaters 210 and the heat pumps 220 is appropriately changed. Is possible. However, when the hot water of the different temperature supplied to the some heater 210 is obtained from each different heat pump 220, it cannot be overemphasized that the number of the heaters 210 and the heat pumps 220 becomes equal. Further, if the number of heat pumps 220 exceeds the number of heaters 210, there is a heat pump 220 that does not supply hot water to the heaters 210, that is, that is not used, which is not preferable because unnecessary costs and installation areas occur.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the example which concerns. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  In the embodiment described above, the control units 140 and 240 control the hot water temperature of the heat pumps 120 and 220 based on the predetermined temperature of the indoor space set in the air conditioners 100 and 200, but the present invention is not limited to this. Instead of the predetermined temperature, the hot water temperature of the heat pumps 120 and 220 may be controlled based on the predetermined humidity, the temperature of the air flowing into the air conditioners 100 and 200, and the humidity of the air. It is also possible to control based on the difference between the air temperature and the predetermined temperature and the difference between the air humidity and the predetermined humidity.

  Furthermore, in this embodiment, only the temperature of the hot water supplied to the heaters 110 and 210 (the temperature of the hot water discharged from the heat pumps 120 and 220) is controlled. However, the present invention is not limited to this. The amount of hot water supplied to the heaters 110 and 210 may be controlled.

  The present invention can be used as an air conditioner that maintains the temperature and humidity of an indoor space at a predetermined temperature and a predetermined humidity.

It is a figure explaining the air conditioning of the indoor space using the air conditioner concerning this embodiment. It is a figure which shows the structure of the air conditioner concerning 1st Embodiment. It is an air diagram which shows the change of temperature and humidity when predetermined temperature is 20 degreeC and predetermined humidity is 80%. It is an air diagram which shows the change of temperature and humidity when predetermined temperature is 15 degreeC and predetermined humidity is 80%. It is a figure which shows the structure of the air conditioner concerning 2nd Embodiment. It is an air diagram which shows the change of the temperature and humidity of the air in the air conditioner concerning 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100, 200 ... Air conditioner 102 ... Sensor 104 ... Pre filter 106 ... Medium performance filter 108 ... Cooler 110, 210, 210a, 210b ... Heater 110a, 110b, 110c, 212a, 212b ... Hot water piping 112 ... Humidifier 114 ... Blower 120, 220, 220a, 220b ... Heat pump 122 ... Evaporator 124 ... Compressor 126 ... Radiator 128 ... Expansion means 130, 230 ... Pump 132 ... Thermal storage tanks 132a, 132b, 132c ... Intake port 140, 240 ... Control part

Claims (7)

An air conditioner that maintains the temperature and humidity of an indoor space at a predetermined temperature and a predetermined humidity,
A heat pump that generates hot water using heat obtained by the refrigerant by heat exchange with the outside air;
A plurality of heaters for heating air using the hot water as a heat source;
A humidifier for humidifying the air;
A blower for sending air that has passed through the heater and humidifier to the indoor space;
A controller that controls the temperature of the hot water generated by the heat pump based on the predetermined temperature, and
The plurality of heaters are juxtaposed in the air traveling direction,
The air conditioner characterized in that hot water having different temperatures is supplied to the plurality of heaters. An air conditioner that maintains the temperature and humidity of an indoor space at a predetermined temperature and a predetermined humidity,
A heat pump that generates hot water using heat obtained by the refrigerant by heat exchange with the outside air;
A heater for heating air using the hot water as a heat source;
A humidifier for humidifying the air;
A blower for sending air that has passed through the heater and humidifier to the indoor space;
A controller that controls the temperature of the hot water generated by the heat pump based on the predetermined temperature, and
The heater has a plurality of pipes through which the hot water flows,
An air conditioner characterized in that hot water having different temperatures flows through the plurality of pipes. A plurality of the heaters are provided,
The plurality of heaters are juxtaposed in the cross-sectional direction of the air flow path,
The air conditioner according to claim 2, wherein hot water having different temperatures can be supplied to each of the plurality of heaters. A plurality of the heat pumps are provided,
The air conditioner according to claim 1 or 2, wherein the hot water having different temperatures is supplied from different heat pumps among the heat pumps. The heat pump has a heat storage tank for storing hot water generated by the heat pump,
The air conditioner according to claim 1 or 2, wherein the hot water having different temperatures is taken from different positions of the heat storage tank.   The air conditioner according to claim 1 or 2, wherein the humidifier is a vaporizing humidifier.   The air conditioner according to claim 1 or 2, wherein the air is outside air and air collected from the indoor space.

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