JP5098346B2 - Ventilation air conditioner - Google Patents

Description

  The present invention relates to a ventilation air conditioner that performs ventilation air conditioning of a bathroom or the like using a heat pump.

  Conventionally, ventilation air conditioners for bathrooms using this type of heat pump are used in bathrooms or washrooms, and are equipped with a refrigeration cycle evaporator, condenser, and compressor in the circulation air path, and are cooled and dehumidified by the evaporator. Then, the air heated by the condenser is blown to dry the bathroom, and since the compressor is provided in the circulation air passage, the air that has passed through the condenser adds heat obtained from the compressor. In some cases, the blow-off drying performance is improved (see, for example, Patent Document 1).

  In addition, as a ventilation air conditioner such as a bathroom using another heat pump, one heat exchanger of the heat pump radiates (or absorbs heat) to air taken from outside the bathroom, and blows the air into the bathroom The other heat exchanger of the heat pump heats (or dissipates) heat from the air discharged from the bathroom to the outside, thereby air-conditioning the bathroom (for example, see Patent Document 2).

Japanese Patent Laid-Open No. 2003-343892 JP 2005-180712 A

  In the conventional bathroom air conditioner as exemplified in Patent Document 1, since the air blown to the compressor is heated air after condensation, the temperature of the compressor becomes high, and the deterioration of the bearings is accelerated to deteriorate the durability. was there.

  Further, in the conventional bathroom air conditioner as exemplified in Patent Document 2, heat is collected from the air exhausted from the bathroom to the outside, and the bathroom is air-conditioned. However, the heat exchanger collects all the heat of the exhaust air. Because it is impossible to do so, some of the heat (cold heat) that conditioned the bathroom leaks to the outside, causing heat loss, resulting in poor thermal efficiency, and problems with heat exchangers in the cold environment of winter Since a heater is used as suppression of frost formation or as an auxiliary to heating, there is a problem of consuming a lot of electric power for heating.

The present invention solves such a conventional problem, and it is possible to improve the durability by cooling the compressor with the intake air and keeping the temperature of the compressor low, and generating heat from the compressor and the like. An object of the present invention is to provide a ventilation air conditioner that uses air warmed by heat generation and heat dissipation of the body, improves thermal efficiency by heat recovery , and can save energy.

Ventilating air-conditioning system of the present invention includes a main body and, a circulation air duct having a circulating fan for blowing air from a first air outlet which opens into the bathroom space sucks air from the suction port opened to the bathroom space, another room a ventilating air duct having a ventilation fan to ventilate by discharging outdoors draws in air from the air suction port which is open to the space, a compressor for compressing a refrigerant, the air and the refrigerant that is blown by the circulating fan a first heat exchanger for exchanging heat, an expansion mechanism for expanding the refrigerant, the ventilation and heat recovery means for the air and the refrigerant is heat exchanged blown by the fan, the first heat exchanger following next to the compressor And a control circuit for controlling the ventilation fan, the circulation fan, and the compressor so as to circulate the refrigerant in the order of the expansion mechanism and then the heat recovery means, and a heat generated from the control means. Radiate heat The compressor and the heat radiating plate disposed on the ventilating air passage, in the heat recovery unit, air sucked from the further chamber space is the heated heated by the heat generated from the compressor and the heat radiating plate air wherein the refrigerant absorbs heat in the first heat exchanger, the refrigerant in the air blown out from the first outlet by the circulation fan is sucked from the suction port to heat the bathroom space by radiating from And

  Further, the heating element arranged in the ventilation air passage is arranged so that the surface having a large projected area is not perpendicular to the direction of the air flowing in the ventilation air passage.

  In addition, an opening / closing plate is provided in the air passage to the heating element.

A body according to the present invention, the air circulation duct having a circulating fan for blowing air from a first air outlet which opens into the bathroom space sucks air from the suction port opened to the bathroom space, opening into another indoor space ventilation and ventilating air path having a fan, a compressor for compressing a refrigerant, to exchange heat with air and the refrigerant that is blown by the circulating fan to ventilate by discharging from the air intake port outdoors draw in air a first heat exchanger, and an expansion mechanism for expanding the refrigerant, the expansion of the air and the refrigerant that is blown by the ventilation fan and the heat recovery unit for heat exchange, next to the first heat exchanger following said compressor Next, a refrigerant circuit connected by piping so that the refrigerant circulates in the order of the heat recovery means, and a control means for controlling the ventilation fan, the circulation fan and the compressor, and radiates heat generated from the control means. With heat sink Arranged serial compressor ventilation air duct, in the heat recovery unit, the refrigerant from the further air sucked from the room space is heated by the heat generated from the compressor and the heat radiating plate that heated air There absorbs heat in the first heat exchanger, the circulating fan by that the refrigerant in the air blown from the first air outlet is sucked from the suction port to heat the bathroom space by radiating an internal body It is possible to provide a ventilation air conditioner that can recycle the generated heat and can save energy because the heat efficiency is improved by the reuse.

  In addition, by sucking the air in the ventilation air passage from the air intake opening that opens into another indoor space, by using the heat in another room and the heat generated inside the main body, it improves the thermal efficiency, thus saving energy, It is possible to provide a ventilation air conditioner that is effective in preventing the heat of the indoor space in which the main body is installed from being discharged to the outdoors.

  In addition, by arranging the compressor in the ventilation air passage as a heat source as a heat source for heat generated inside the main body, the heat generated from the compressor is recovered and reused, improving the thermal efficiency and saving energy. In addition, the compressor can be efficiently cooled by the air sucked from the suction port, and the durability of the compressor can be improved by keeping the temperature of the compressor low.

In addition, the main body is provided with a control means for controlling the compressor and the fan, and the control means is arranged in the ventilation air passage as a heat source for the heat generated inside the main body, so that the heat generated from the control means is generated. by recovering and reuse, since improving the thermal efficiency can efficiently cooled by air sucked control unit from the suction port together with saving energy, miniaturization of components, Ru can be reduced in cost.

  In addition, it is possible to reduce the ventilation resistance by arranging so that the large projected area of the heating element placed in the ventilation air passage is not perpendicular to the direction of the air flowing through the ventilation air passage. Thus, the ventilation load of the ventilation fan can be reduced, energy saving can be achieved, and the ventilation air conditioner can be provided which has the effect of reducing the noise generated when the blower collides with the heating element.

  In addition, by providing an opening / closing plate in the air passage to the heating element, it is possible to suppress the promotion of an overload state of the heat exchange cycle when heat supplementation from the heating element is unnecessary, and the blower collides with the heating element. Therefore, it is possible to provide a ventilation air conditioner that is effective in suppressing noise generated when it is performed.

1 is a schematic cross-sectional view showing a ventilation air-conditioning apparatus according to Premise Example 1 of the present invention ((a) a schematic cross-sectional view showing a ventilation air-conditioning apparatus in which the opening / closing plate is closed), (b) a ventilation air-conditioning apparatus in which the opening / closing plate is in an open state; Schematic sectional view) The figure which shows an example of the same control means, and a mounting state ((a) The figure which shows the structure using the same printed wiring board, (b) The surface where the same projection area is wide is perpendicular | vertical with respect to the direction of the ventilation which flows in the ventilation air path (Figure showing that it is arranged horizontally so as not to become) Schematic sectional view showing a ventilation air-conditioning apparatus according to Embodiment 1 of the present invention The figure which shows an example and mounting state of the same heat sink ((a) The figure which shows the structure using the same fin shape, (b) The wide surface of the same projection area is perpendicular | vertical with respect to the direction of the ventilation which flows in the ventilation air path Figure showing that it is arranged horizontally so as not to become) Schematic sectional view showing a ventilation air conditioner described in Reference Example 1 of the present invention ((a) Schematic sectional view showing a ventilation air conditioner in which the opening and closing plate is closed, (b) A ventilation air conditioning device in which the opening and closing plate is in an open state Schematic sectional view)

The invention of claim 1, wherein the present invention includes a main body and, a circulation air duct having a circulating fan for blowing air from a first air outlet that opens through the suction port opened to the bathroom space to the bathroom space to inhale air, a ventilating air duct having a ventilation fan to ventilate by discharging outdoors draws in air from the air suction port which is open to another indoor space, a compressor for compressing a refrigerant, the air blown by the circulation fan and the first heat exchanger the refrigerant is heat exchanged, and an expansion mechanism for expanding the refrigerant, and the heat recovery unit for the air and the refrigerant that is blown by the ventilation fan heat exchanger, the first heat following said compressor comprising a refrigerant circuit the refrigerant in the order of the heat recovery means exchanger next to the expansion mechanism following are connected by piping so as to circulate, and control means for controlling the ventilating fan and the circulating fan and the compressor, from the control unit Heat generated The compressor and heat radiating plate disposed on the ventilation air duct, in the heat recovery means, said further air sucked from the room space is heated by the heat generated from the compressor and the radiator plate is the heated It said refrigerant absorbs heat from the air in the first heat exchanger, that the refrigerant in the air blown from the first outlet by the circulation fan is sucked from the suction port to heat the bathroom space by radiating The heat generated in the control means and compressor inside the main body and the heat generated inside the main body are absorbed by the refrigerant in the ventilation air passage, and the refrigerant radiates heat to the circulating air circulating in the main body and the indoor space. The heat generated in the main body is recovered in the circulating air together with the heat in another room and the heat generated in the main body, thereby improving the heat efficiency.

  Further, the heating element arranged in the ventilation air passage is arranged so that the surface with a large projected area is not perpendicular to the direction of the air flowing in the ventilation air passage. It has the effect | action that resistance can be reduced.

  In addition, it is characterized in that an opening / closing plate is provided in the air passage to the heating element, and the amount of heat replenished to the heat recovery means can be adjusted by varying the amount of air blowing to the heating element. Has an effect.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

( Assumption example 1)
A ventilation air conditioner according to Premise Example 1 of the present invention will be described with reference to FIGS. 1 and 2.

  As shown in FIG. 1 and FIG. 2, the ventilation air conditioner of the present invention is installed behind the ceiling and sucks air from the main body 1 and a suction port 2 opened in an indoor space (for example, a bathroom) to open the first into the indoor space. A circulation air passage 5 provided with a circulation fan 4 that blows out air from the air outlet 3, a ventilation air passage 7 provided with a ventilation fan 6 that performs ventilation by sucking air from the suction port 2 and discharging it to the outside, and a refrigerant The compressor 8 for compression, the first heat exchanger 9 for exchanging heat between the air blown by the circulation fan 4 and the refrigerant, the expansion mechanism 10 for expanding the refrigerant, and the air and refrigerant blown by the ventilation fan 6 are heated. The refrigerant circulates in the order of the heat recovery means 11 to be exchanged, the compressor 8, the first heat exchanger 9, the first heat exchanger 9, the expansion mechanism 10, the expansion mechanism 10, and then the heat recovery means 11. Refrigerant circuit 12 connected by piping and ventilation A heating element serving as a heat source for heat generated inside the main body is provided with an opening / closing plate 13 for switching the air path in the passage 7, a control unit 14 for controlling the compressor 8, the circulation fan 4, the ventilation fan 6, and the opening / closing plate 13. The compressor 8 and the control means 14 are arranged in the ventilation air passage 7, and the overload detection means for detecting the overload state is a temperature detection means 15 for detecting the temperature of the control means 14. The humidity detecting means 16 for detecting the humidity is provided.

  The control means 14 only needs to be able to control the compressor 8, the circulation fan 4, the ventilation fan 6, and the opening / closing plate 13, and examples thereof include a circuit configuration using a relay, a printed wiring board, and a control board.

  The heat recovery means 11 only needs to be able to exchange heat between the refrigerant and air. For example, the heat recovery means 11 has a configuration using pipes and fins arranged vertically and horizontally, and the material is mainly made of copper or aluminum having good heat conductivity. is there.

  The temperature detecting means only needs to be able to detect the temperature. For example, there are a positive characteristic thermistor and a negative characteristic thermistor.

  The humidity detection means only needs to be able to detect humidity. For example, a polymer film humidity sensor that detects the relative humidity of the atmosphere from a change in dielectric constant accompanying absorption and release of moisture in the polymer film, and a porous film that easily adsorbs water vapor. There are a ceramic humidity sensor in which a wet and dry material is composed of a ceramic sintered body using a porous ceramic, an electrolyte humidity sensor using lithium chloride, and the like.

  In the above configuration, when the ventilation air conditioner is in operation, the compressor 8, the circulation fan 4 and the ventilation fan 6 are operated by a signal from the control means 14, so that the refrigerant becomes the compressor 8 and the first heat exchanger 9. The expansion mechanism 10 and the heat recovery means 11 flow in this order. In the heat recovery means 11, the refrigerant absorbs heat from the air sucked from the suction port 2 and discharged to the outside, and the air circulating in the indoor space in the first heat exchanger 9 When the refrigerant radiates heat, the indoor space is heated.

  At this time, when the opening / closing plate 13 of FIG. 1A is in a closed state, the air sucked from the suction port 2 is discharged outside through the heat recovery means 11 without passing through the compressor 8 and the control means 14. Is done.

  In addition, when the opening / closing plate 13 in FIG. 1B is in an open state, the air sucked from the suction port 2 is warmed by passing through the compressor 8 and the control means 14, so that the heat recovery means 11 The heat absorbed can be absorbed by adding heat generated in the main body 1 including heat generated from the compressor 8 and the control means 14 to the heat of the air sucked from the suction port 2 to improve heat efficiency and save energy. In addition, the compressor 8 can be efficiently cooled by the air sucked from the suction port 2, and the temperature of the compressor 8 can be kept low to improve durability.

  Moreover, since the control means 14 can also be cooled at the same time, the control means 14 can be reduced in size and cost.

  In addition, since the air warmed by the compressor 8 and the control means 14 is blown to the heat recovery means 11, frost formation on the heat recovery means 11 that occurs at low temperatures can be suppressed without using a heater or the like. it can.

  Further, the amount of air blown to the air passage communicating with the compressor 8 and the control means 14 can be varied by the opening degree of the opening / closing plate 13, and the temperature of the indoor space is high (for example, 30 ° C. or more) and the compressor 8 is controlled. When heat replenishment from the means 14 is unnecessary, it is possible to prevent the overload state of the heat exchange cycle from being accelerated by adjusting the opening of the opening / closing plate 13 in the closing direction. The generated noise can also be suppressed.

  Further, the control means 14 has a configuration using the printed wiring board shown in FIG. 2A, and a surface with a large projected area is directed in the direction of the air flowing through the ventilation air passage 7 as shown in FIG. Since it is arranged horizontally so as not to be vertical, the load current of the ventilation fan 6 is reduced by reducing the ventilation resistance, energy saving is achieved, and noise generated when the control means 14 collides with air blow is reduced. be able to.

  Further, the control means 14 has been described as a configuration using a printed wiring board as an example. However, the control means 14 may be arranged separately for each component. In this case, a surface with a large projected area of each component is in the ventilation air passage 7. The same action and effect can be obtained by arranging it so as not to be perpendicular to the direction of the air flowing through.

  When the value detected by the humidity detection means 16 is out of an arbitrary range (for example, when the relative humidity is 85% or more), the control means 14 controls the opening / closing plate 13 in the closing direction, and the control means 14 Since the air flow to the compressor 8 can be varied or the air blow can be stopped, the control means 14 and the compressor 8 are prevented from being placed in a high humidity environment, and the occurrence of condensation and rust is suppressed. Can do.

  Further, when the value detected by the temperature detecting means 15 is out of an arbitrary range (for example, 80 ° C. or more), the control means 14 controls the opening / closing plate 13 in the opening direction to compress the control means 14 and the compression means 14. Since the amount of air blown to the machine 8 can be varied and cooled, the parts of the control means 14 can be reduced in size and cost, and the temperature of the electronic parts used in the control means 14 can be reduced by keeping the temperature of the control means 14 constant. The characteristic tolerance can be reduced, and the performance of the apparatus can be stably obtained.

(Embodiment 1 )
The ventilation air conditioner of Embodiment 1 of this invention is demonstrated referring FIG. 3 and FIG.

In the description of the first embodiment, the same components that have already been described in the first example are assigned the same reference numerals, and detailed descriptions thereof are omitted.

  As shown in FIGS. 3 and 4, a ventilation air passage 18 provided with an intake port 17 for sucking air from another indoor space (for example, a toilet, a dressing room, a living room, etc.) other than the indoor space in which the main body 1 is installed; The overload detection means is the current detection means 19 for detecting the current supplied to the control means 14, and the heat dissipation plate 20 for radiating heat is provided in the control means 14, and the control means 14 is arranged other than the ventilation air passage 18, The heat radiating plate 20 as a heating element is configured to protrude into the ventilation air passage 18.

  The current detecting means 19 only needs to be able to detect the amount of current. For example, the current detecting means 19 includes a means for detecting a voltage generated at both ends of the resistor and a means using a current transformer.

  In the above configuration, when the ventilation air conditioner is in an operating state, the air sucked from another indoor space is sucked into the ventilation air passage 18 from the intake port 17 by the action of the ventilation fan 6 and passes through the heat radiating plate 20. Since it is warmed, the heat absorbed by the heat recovery means 11 can be absorbed by adding heat generated inside the main body 1 including heat generated from the heat radiating plate 20 to heat of air sucked from the air inlet 17. Since the heat efficiency is improved, it is possible to save energy and prevent the heat of the indoor space in which the main body 1 is installed from being discharged to the outdoors.

  Further, since the control means 14 can be efficiently cooled through the heat radiating plate 20 without being arranged in the ventilation air passage 18, it is not necessary to consider the volume of dust to the control means 14, Since air heated by the heat radiating plate 20 is blown to the heat recovery means 11, frost formation on the heat recovery means 11 that occurs at low temperatures can be suppressed without using a heater or the like.

  Further, the heat radiating plate 20 has a configuration using the fin shape shown in FIG. 4 (a), and a surface with a large projected area as shown in FIG. In order to reduce the ventilation resistance, the load current of the ventilation fan 6 is reduced, energy saving is achieved, and noise generated when the fan 20 collides with the heat sink 20 is reduced. Can do.

  Further, when the value detected by the current detection means 19 is out of an arbitrary range (for example, when the value exceeds the rated current of the apparatus), the rotation speed of the ventilation fan 6 is increased by the control means 14, and the heat sink 20 Since the amount of air blown can be varied and cooled, the parts of the control means 14 can be reduced in size and cost, and the temperature of the electronic parts used in the control means 14 can be kept constant by keeping the temperature of the control means 14 constant. Can be reduced, and the performance of the apparatus can be stably obtained.

( Reference Example 1 )
A ventilation air conditioner according to Reference Example 1 of the present invention will be described with reference to FIG. FIG. 5 is a schematic cross-sectional view showing the ventilation air-conditioning apparatus described in Reference Example 1 of the present invention, and FIG. 5 (a) is a schematic cross-sectional view showing the ventilation air-conditioning apparatus with the opening / closing plate in a closed state. b) is a schematic cross-sectional view showing a ventilation air conditioner with the opening and closing plate open.

Incidentally, already assumes Example 1, is applied to the detailed description of the same reference numerals for the same parts described in the first embodiment is omitted in the description of Example 1.

  As shown in FIG. 5, the overload detection means is arranged as the non-contact temperature detection means 21 so as to detect the charging part temperature of the compressor 8 and the ventilation air temperature detection means for detecting the air temperature to the heat recovery means. 22 is provided.

  Further, the non-contact temperature detecting means only needs to be able to detect the temperature without contacting the temperature detecting portion, and for example, there is one using infrared rays.

  Further, the ventilation air temperature detecting means is only required to be able to detect, for example, a positive characteristic thermistor and a negative characteristic thermistor.

  In the above configuration, when the value detected by the non-contact temperature detecting means 21 is out of an arbitrary range (for example, 80 ° C. or more), the control means 14 increases the rotational speed of the ventilation fan 6 to increase the compressor Since the air flow to 8 can be varied and cooled, the temperature detection of the charging unit can be easily electrically insulated.

  Further, when the value detected by the ventilation air temperature detection means 22 deviates from an arbitrary range (for example, 30 ° C. or more), the control means 14 controls the opening / closing plate 13 in the closing direction, and the control means 14 The amount of air blown to the compressor 8 can be varied, or the air blow can be stopped, and the amount of heat replenished to the heat recovery means 11 can be arbitrarily varied, thus reducing the overload state of the refrigeration cycle. The load state can be adjusted.

  The ventilation air conditioner of the present invention is characterized in that it uses air warmed by heat obtained while cooling components that generate heat, and suppresses frost formation and improves heat efficiency by heat recovery to save energy. Therefore, the present invention can be applied not only to ventilation air conditioning in a bathroom but also to ventilation air conditioning equipment in a living room, bedroom, kitchen, or washroom.

DESCRIPTION OF SYMBOLS 1 Main body 2 Suction port 3 1st blower outlet 4 Circulation fan 5 Circulation air path 6 Ventilation fan 7 Ventilation air path 8 Compressor 9 1st heat exchanger 10 Expansion mechanism 11 Heat recovery means 12 Refrigerant circuit 13 Opening and closing plate 14 Control means 15 Temperature detection means 16 Humidity detection means 17 Inlet 18 Ventilation air passage 19 Current detection means 20 Heat sink 21 Non-contact temperature detection means 22 Ventilation air temperature detection means

Claims (3)

Body and the air circulation duct having a circulating fan for blowing air from a first air outlet which opens into the bathroom space sucks air from the suction port opened to the bathroom space, from air intake port that opens into another indoor space a ventilating air duct having a ventilation fan to ventilate by discharging outdoors draws in air, a compressor for compressing a refrigerant, a first heat exchanger for the air and the refrigerant that is blown by the circulating fan heat exchanger If, and an expansion mechanism for expanding the refrigerant, the heat of the air and the refrigerant that is blown by the ventilation fan and the heat recovery unit for heat exchange, the expansion mechanism next next to the first heat exchanger following said compressor A refrigerant circuit piped so that the refrigerant circulates in the order of the recovery means; and a control means for controlling the ventilation fan, the circulation fan and the compressor, and a heat radiating plate for radiating heat generated from the control means and the compression Change machine Placed in the wind path in the heat recovery unit, said another of said coolant from the heated air heated by the heat air drawn occurs from the compressor and the radiator plate from the indoor space absorbs heat, the third in Ichinetsu exchanger, the circulating fan by ventilating air-conditioning system, characterized by heating the bathroom space by the refrigerant releases heat to the air blown from the first air outlet is sucked from the suction port. The ventilation air conditioner according to claim 1 , wherein the ventilation air conditioner is disposed in a ventilation air passage so that a surface with a large projected area of the heating element is not perpendicular to a direction of air flowing in the ventilation air passage. . The ventilation air conditioner according to claim 1 or 2 , wherein an opening / closing plate is provided in an air passage to the heating element.

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