JP2019082308A - Ventilator - Google Patents

Abstract

To provide a ventilator that enables humidification and dehumidification even in extremely cold season and extremely hot season, can control a temperature of outside air to take the air into a room and has comfort in the room and energy saving performance.SOLUTION: A ventilator (100) includes a first air flow passage (12), a second air flow passage (13), outdoor temperature detection means (23), outdoor humidity detection means (24), rotary moisture adsorption means (8), a refrigerant circuit (90) and a control section (31) for performing control. The ventilator (100) has a dehumidification mode (II), a humidification mode (III), a cooling mode (IV), a warming mode (V), a total heat exchange mode (VI) and a purge mode (I). The control section (31) performs operation in any mode in accordance with outdoor detection humidity (Ho) and an outdoor detection temperature (To).SELECTED DRAWING: Figure 7

Description

  TECHNICAL FIELD The present invention relates to a ventilating apparatus used in a house or the like.

  In recent homes, 24-hour ventilation is required as the air tightness increases. From the viewpoint of comfort and energy saving, it is desirable that a 24-hour ventilation system for ventilating indoors and outdoors has a dehumidifying function and a humidifying function.

  The invention described in Patent Document 1 is an air conditioning control device including an external air conditioner (first air conditioner) and an air conditioner (second air conditioner). The first air conditioner is a desiccant-type external air conditioner that carries a refrigerant circuit and an adsorbent, and performs humidification operation or dehumidification operation. A 2nd air conditioner is an air conditioner which connects an indoor unit and an outdoor unit by refrigerant | coolant piping, and performs temperature control of indoor space.

  In detail, the temperature and humidity of the outside air to be taken in are measured, and the operation mode of the first air conditioner and the second air conditioner is determined based on the measured values, and the operation is performed. In the first air conditioner, the modes of dehumidifying ventilation, humidifying ventilation, and ventilation are switched, and in the second air conditioner, modes of heating, cooling, and air blowing are switched. Therefore, the first air conditioner and the second air conditioner are connected by the communication means, and the air conditioning controller determines and executes each mode.

JP 2012-83086

  In the above air conditioning control device, for example, in the extremely cold season of winter, low temperature and low humidity outside air is taken into the first air conditioner, but the desiccant rotor can not obtain a sufficient humidifying function, and further low temperature air enters the room. (2) The heating load of the air conditioner will be increased, and the room comfort and energy saving will be impaired. Furthermore, since the functions of dehumidification, humidification, heating, cooling, and ventilation are shared between the first air conditioner and the second air conditioner and functioned, a control device and communication means are required to control the functions.

  Therefore, an object of the present invention is to provide a ventilating apparatus capable of humidifying and dehumidifying even in extremely cold season or extremely hot season, controlling the outside air temperature and taking it into the room, and having the comfort and the energy saving property of the room.

  Furthermore, when the room becomes the target environment, it is to provide a ventilation system with excellent energy saving while maintaining the ventilation function.

In order to achieve the above object, the present invention relates to a first air flow path for supplying outdoor air into the room, a second air flow path for exhausting indoor air to the room, and an inlet of the first air flow path. An outdoor temperature detection means for detecting an outdoor temperature, an outdoor humidity detection means for detecting an absolute humidity, and the first air flow path disposed across the first air flow path and the second air flow path And rotary water adsorption means for adsorbing the moisture of the air flowing through one of the second air flow passages and releasing the moisture to the air flowing through the other flow passage, the first air flow passage, and the first air flow passage A ventilator comprising a refrigerant circuit for heating air flowing in one of the second air flow paths and cooling the air flowing in the other, and a control unit for performing control, wherein the water adsorption means is rotated, A dehumidifying mode for operating the refrigerant circuit to cool the first air flow path; Means for rotating the refrigerant circuit to operate the refrigerant circuit to heat the first air flow path, and stopping the moisture adsorption means to operate the refrigerant circuit to operate the first air flow path. A cooling mode for cooling, a heating mode for stopping the water adsorption means and operating the refrigerant circuit to heat the first air flow path, and a high speed rotation of the water adsorption means for the refrigerant circuit A total heat exchange mode in which total heat exchange is performed between the first air flow path and the second air flow path, and a purge mode in which the water adsorption means and the refrigerant circuit are stopped and only ventilation is performed. The control unit is a humidity set value h1, h2, h3, h4, where (h1 <h2 <h3 <h4) and a temperature set value t1, t2, where The value which is <t2) is predetermined and obtained from the outdoor humidity detection means A detected humidity _{H 0} value, the detected temperature _{T 0} values obtained from the outdoor temperature detecting means, _{H 0} is the case of less than h1, select Zen'netsu交mode, _{H 0,} of less than h1 than h2, T ₀ is, if it is less than t2, selects the humidification mode, _{H 0,} of less than h1 above h3, is _{T 0,} in the case of more than t2, selects the cooling mode, _{H 0} is less than h2 or h3 in, _{T 0} is, if it is less than t1, to select the heating mode, the _{H 0,} of less than h2 or h3, _{T 0} is, if it is less than t1 or more t2, selects the purge mode, the _{H 0} , if it is less than h3 than h4, select the dehumidification mode, are H _0, is not less than h4, it is possible to select Zen'netsu交mode, operating in either mode the selected.

Since the ventilating apparatus according to the present invention combines the refrigerant circuit and the desiccant rotor, it is excellent in energy saving and can be operated independently without being synchronized with the indoor air conditioner, so that the implementation is also easy.
Furthermore, in the total heat exchange mode, it is possible to prevent the capacity of the refrigerant circuit from being reduced and to overload the indoor air conditioner.

It is a block diagram which shows typically the air flow path of the ventilator concerning the embodiment of the present invention. It is an explanatory view showing composition of a refrigerant circuit of a ventilation device concerning an embodiment of the present invention. It is a block diagram which shows the electrical connection of the main-control part of the ventilator concerning embodiment of this invention. It is a flowchart which shows the flow of the refrigerant | coolant of a refrigerant circuit at the time of dehumidification mode or cooling mode of the ventilator concerning embodiment of this invention. It is a flowchart which shows the flow of the refrigerant | coolant of a refrigerant circuit at the time of humidification mode or heating mode of the ventilator concerning embodiment of this invention. It is a table | surface which shows control of the main-control part in each operation mode of the ventilator concerning embodiment of this invention. It is an air line figure showing the operation mode by the conditions of the temperature of outdoor air, and humidity according to the embodiment of the present invention. It is an air line figure showing the operation mode by the conditions of the temperature of indoor air, and humidity according to the embodiment of the present invention. It is a flowchart of the process which determines the operation mode of the main-control part of the ventilator concerning embodiment of this invention. It is a flowchart of the process which determines the operation mode of the main-control part of the ventilator concerning embodiment of this invention. It is a flowchart of the process which transfers to total heat exchange mode during driving | operation of the main-control part of the ventilator concerning embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described based on the drawings.

[Configuration of air flow path]
FIG. 1 is a block diagram schematically showing an air flow path of a ventilating apparatus 100 according to an embodiment of the present invention. As shown in FIG. 1, the ventilator 100 includes a first air flow passage 12 directed from the outside to the room and a second air flow passage 13 directed from the room to the outside, for the room to be subjected to air conditioning control. ing.

  The first air flow passage 12 is a flow passage for supplying outdoor air (OA; Out Air) to the room by the SA (Supply Air) fan 10 provided on the downstream side, and the first heat exchanger 5 The outdoor air is supplied to the room via the rotary desiccant rotor 8 (water adsorption means), the second heat exchanger 7 and the SA fan 10. The desiccant rotor 8 is disposed straddling the first air flow passage 12 and the second air flow passage 13 and can be rotated by a motor 20 described later to exchange the humidity of the air flow passages with each other.

  The second air flow path 13 is a flow path for discharging indoor air (RA; Return Air) to the outside by an EA (Exhaust Air) fan 9 provided downstream thereof, and the third heat exchanger 4, The indoor air is discharged to the outside through the desiccant rotor 8, the fourth heat exchanger 6 and the EA fan 9.

[Configuration of desiccant rotor]
The desiccant rotor 8 according to the present invention is a rotary desiccant, and rotates the desiccant rotor 8 by the rotation of the motor 20 (not shown), so that sensible heat and latent heat in the air flowing through the first air passage 12 and the second air passage 13 It is possible to replace. The rotation speed of the motor 20 functions as a conventional rotary desiccant when rotated at a normal speed, but when rotated at high speed (for example, 10 times the normal rotation speed), the function equivalent to a total heat exchanger Have. That is, although water (humidity) in the air is mainly exchanged at a normal rotation speed, total heat exchange of both latent heat and sensible heat becomes possible when rotating at high speed.

[Configuration of refrigerant circuit]
Next, with reference to FIG. 2, the configuration of the refrigerant circuit 90 provided in the ventilation device 100 according to the present embodiment will be described.

  As shown in FIG. 2, the ventilating apparatus 100 according to the present embodiment is a heat pump device, and includes a refrigerant circuit 90 for circulating a refrigerant, a desiccant rotor 8, an SA fan 10, and an EA fan 9. The refrigerant circuit 90 includes a compressor 1 that compresses and outputs a refrigerant, an accumulator 2 that is provided at a front stage of the compressor 1 and temporarily accumulates the refrigerant supplied to the compressor 1, and a compression that is delivered from the compressor 1 A four-way valve 3 (output switching means) is provided to switch the refrigerant to be output to the heat exchanger on either the first air flow passage 12 side or the second air flow passage 13 side. Furthermore, the refrigerant circuit 90 includes a first heat exchanger 5 provided on the upstream side of the desiccant rotor 8 of the first air flow passage 12, a second heat exchanger 7 provided downstream of the desiccant rotor 8, and a second air flow. A third heat exchanger 4 provided upstream of the desiccant rotor 8 in the passage 13 and a fourth heat exchanger 6 provided downstream of the desiccant rotor 8 are provided.

  Further, the refrigerant circuit 90 includes a first expansion valve 18, a second expansion valve 19, an outdoor temperature sensor 23 for detecting the temperature of air flowing through the first air flow path 12, and an absolute value of air flowing through the first air flow path 12. An outdoor humidity sensor 24 for detecting humidity is provided. The outdoor temperature sensor 23 and the outdoor humidity sensor 24 are disposed in front of the first heat exchanger 5, that is, on the air intake side. Therefore, the temperature and absolute humidity of air entering the ventilator 100 from outside are detected.

  The refrigerant circuit 90 further includes an indoor temperature sensor 25 that detects the temperature of the air flowing through the second air flow path 13 and an indoor humidity sensor 26 that detects the absolute humidity of the air flowing through the second air flow path. The indoor temperature sensor 25 and the indoor humidity sensor 26 are disposed in front of the third heat exchanger 4, that is, on the air intake side. Therefore, the temperature and absolute humidity of air entering the ventilator 100 from the room are detected.

  The first expansion valve 18 is provided between the pipes connecting the first heat exchanger 5 and the third heat exchanger 4 and reduces the pressure of the refrigerant flowing between the first and third heat exchangers 5 and 4. Adjust the refrigerant flow rate. The second expansion valve 19 is provided between the pipes connecting the second heat exchanger 7 and the fourth heat exchanger 6 and reduces the pressure of the refrigerant flowing between the second and fourth heat exchangers 7 and 6. Adjust the refrigerant flow rate. In addition, the flow direction of the refrigerant | coolant of the 1st expansion valve 18 and the 2nd expansion valve 19 shall be adjustable by which direction.

  Furthermore, the ventilator 100 acquires the detection signals of the respective sensors 23, 24, 25 and 26 described above, determines the operation mode based on the acquired detection signals, and determines the compressor 1, the four-way valve 3, and the first expansion. The main control unit 31 that controls the valve 18 and the second expansion valve 19 is provided. Further, the main control unit 31 also performs the operation or stop operation of the EA fan 9 and the SA fan 10 shown in FIG. 1, the operation or stop operation of the motor 20 for rotating the desiccant rotor 8, and the rotational speed of normal rotation or high speed rotation. Control.

[Configuration of main control unit]
FIG. 3 is a block diagram showing an electrical connection of the main control unit 31 of the present invention. Here, the main control unit 31 can be configured as, for example, an integrated computer including storage means such as a central processing unit (CPU), a RAM, a ROM, and a hard disk. As shown in FIG. 3, the main control unit 31 has a sensor input unit 31 a for inputting detection signals of the sensors 23, 24, 25, 26, an EA fan 9, an SA fan 10, a motor 20, a four-way valve 3, and compression. And an operation unit 31 b for controlling the opening degree of the first expansion valve 18 and the second expansion valve 19.

[Description of each operation mode]
The ventilating apparatus 100 of the present invention has the configurations as described above, (I) purge mode, (II) dehumidification mode, (III) humidification mode, (IV) cooling mode, (V) heating mode, (VI) all The six heat exchange modes are operated while switching as appropriate.
Each mode will be described in detail below.

(I) [purge mode]
The purge mode is a mode in which the air in the target chamber is simply exhausted to supply the outside air into the room. Therefore, the desiccant rotor 8 does not rotate, and the motor 20 does not operate. Furthermore, the refrigerant circuit 90 also stops without operating. Only the EA fan 9 and the SA fan 10 operate to exhaust and supply air. The purge mode is mainly an intermediate mode, i.e., an operation mode in which only ventilation in the room is required as the ventilation system does not require any of dehumidification, humidification, cooling and heating.

(II) [dehumidification mode]
The dehumidification mode is a mode in which outside air is dehumidified and supplied into the room. That is, the OA is allowed to pass through the first heat exchanger 5, the desiccant rotor 8, and the second heat exchanger 7 in this order in the first air flow path 12 to reduce the humidity in the OA, and the SA fan 10 indoors. Supply air to Furthermore, the RA is allowed to pass through the third heat exchanger 4, the desiccant rotor 8, and the fourth heat exchanger 6 in the second air flow path 13 in order, and the exhaust heat generated by the operation of the refrigerant circuit 90 in the EA. Include and discharge. Further, in the dehumidifying mode, the desiccant rotor 8 is normally rotated to move moisture in the air flowing through the first air passage 12 to the air flowing through the second air passage 13 and discharge it.

The detailed operation state of the refrigerant circuit 90 at this time will be described with reference to FIG.
FIG. 4 is a flowchart showing the flow of the refrigerant in the refrigerant circuit 90 in the dehumidifying mode and in the cooling mode described later. In the dehumidifying mode, the first heat exchanger 5 and the second heat exchanger 7 in the first air flow passage 12 become evaporators, the refrigerant evaporates to lower the air temperature, and the heat exchanger causes dew condensation to cause humidity. Lower. The third heat exchanger 4 and the fourth heat exchanger 6 of the second air flow passage 13 function as a condenser and discharge the heat removed from the first air flow passage 12.

  Describing in detail, under the control of the main control unit 31, the discharge side of the compressor 1 is directed to the third heat exchanger 4 and the fourth heat exchanger 6 as indicated by the flow arrow in FIG. Connected to the piping. That is, the refrigerant output from the compressor 1 is branched into two systems, one branch is introduced into the third heat exchanger 4, and the other branch is introduced into the fourth heat exchanger 6.

  In the dehumidifying mode, since the compressed refrigerant output from the compressor 1 is at high temperature and high pressure, the second air is introduced by being introduced into the third heat exchanger 4 and the fourth heat exchanger 6 acting as a condenser. It exchanges heat with air passing through the flow path 13. Therefore, the temperature of the air flowing through the second air flow passage 13 is increased. That is, the refrigerant leaving the heat exchangers 4 and 6 becomes a high pressure liquid refrigerant. Thereafter, the refrigerant output from the third heat exchanger 4 is decompressed and expanded by passing through the first expansion valve 18, and becomes a low-temperature low-pressure gas-liquid mixed refrigerant. This refrigerant is introduced into the first heat exchanger 5.

  Similarly, the refrigerant output from the fourth heat exchanger 6 is also decompressed and expanded by passing through the second expansion valve 19 to become a low-temperature low-pressure gas-liquid mixed refrigerant, and is introduced into the second heat exchanger 7 Ru.

  The refrigerant introduced into the first heat exchanger 5 reduces the temperature of the air (air temperature upstream of the desiccant rotor 8) taken from the outside of the room with evaporation and flowing through the first air flow path 12 to change the phase to gas Do. The refrigerant leaving the first heat exchanger 5 is returned to the accumulator 2 via the four-way valve 3. At this time, the temperature of the air flowing through the first air flow passage 12 is lowered due to the evaporation of the refrigerant, and when dew condensation occurs, the humidity in the air is lowered.

  On the other hand, the refrigerant introduced into the second heat exchanger 7 lowers the temperature of the air (air temperature downstream of the desiccant rotor 8) leaving the desiccant rotor 8 of the first air flow passage 12 with evaporation, thereby causing the gas Phase change. The refrigerant leaving the second heat exchanger 7 joins the refrigerant leaving the first heat exchanger 5 and is returned to the compressor 1 via the four-way valve 3 and the accumulator 2. At this time, the temperature of the air flowing through the first air flow passage 12 is lowered due to the evaporation of the refrigerant, and when dew condensation occurs, the humidity in the air is lowered.

  That is, in the dehumidifying mode, the refrigerant output from the compressor 1 is returned to the compressor 1 via the third heat exchanger 4, the first expansion valve 18, and the first heat exchanger 5, and the fourth Two parallel flow paths are formed of the flow paths that return to the compressor 1 via the heat exchanger 6, the second expansion valve 19, and the second heat exchanger 7.

  Furthermore, in the desiccant rotor 8 of the first air flow passage 12, the air whose temperature has been lowered by the first heat exchanger 5, that is, the air whose relative humidity has risen is adsorbed by the adsorbent held by the elements of the desiccant rotor 8. Moisture in the air is reduced. At this time, the adsorbent of the desiccant rotor 8 causes an exothermic reaction by the hygroscopic action to heat the air. However, the air temperature is lowered again by the second heat exchanger 7 disposed downstream of the desiccant rotor 8. Then, the air is supplied into the room by the SA fan 10.

  In the desiccant rotor 8 of the second air flow passage 13, the air whose temperature has been increased by the third heat exchanger 4, that is, the air whose relative humidity has decreased is released by the adsorbent held by the elements of the desiccant rotor 8. Moisture in the air rises. At this time, the adsorbent of the desiccant rotor 8 causes an endothermic reaction by the moisture releasing action to cool the air. However, the air temperature rises again by the fourth heat exchanger 6 disposed downstream of the desiccant rotor 8. Then, the air is exhausted to the outside by the EA fan 9.

  As described above, in the dehumidifying mode of the present invention, the first air flow path 12 can supply the room air in which the latent heat and sensible heat of the ventilated air are lowered by the action of the refrigerant circuit 90 and the action of the desiccant rotor 8. It is possible.

(III) [humidification mode]
The humidification mode is a mode in which the outside air is humidified and supplied into the room. That is, the OA is allowed to pass through the first heat exchanger 5, the desiccant rotor 8, and the second heat exchanger 7 in this order in the first air flow path 12 to raise the water content in the OA, and the SA fan 10 indoors. Supply air to Furthermore, the RA is allowed to pass through the third heat exchanger 4, the desiccant rotor 8, and the fourth heat exchanger 6 in the second air flow path 13 in order, and the cold heat generated by the operation of the refrigerant circuit 90 is released into the RA. Do. Furthermore, in the humidification mode, the desiccant rotor 8 is normally rotated to move the moisture of the air flowing through the second air flow passage 13 to the air flowing through the first air flow passage 12 and supply the air into the room.

The detailed operation state of the refrigerant circuit 90 at this time will be described with reference to FIG.
FIG. 5 is a flowchart showing the flow of the refrigerant in the refrigerant circuit 90 in the humidification mode and the heating mode described later. In the humidification mode, the first heat exchanger 5 and the second heat exchanger 7 in the first air flow passage 12 become condensers and the refrigerant condenses to raise the air temperature. The third heat exchanger 4 and the fourth heat exchanger 6 of the second air flow passage 13 move the heat to the first air flow passage 12 and thus function as an evaporator to absorb heat and lower the air temperature.

  Describing in detail, under the control of the main control unit 31, the four-way valve 3 is a pipe in which the discharge side of the compressor 1 is directed to the first heat exchanger 5 and the second heat exchanger 7 as shown by the arrows in FIG. Connected to That is, the refrigerant output by the compressor 1 is branched into two systems, one branch is introduced into the first heat exchanger 5, and the other branch is introduced into the second heat exchanger 7.

  In the humidification mode, since the high temperature and high pressure refrigerant is introduced into the first heat exchanger 5 and the second heat exchanger 7 acting as a condenser, the air passing through the first air flow path 12 is heated. Thereafter, the refrigerant output from the first heat exchanger 5 is decompressed and expanded by passing through the first expansion valve 18, and becomes a low-temperature low-pressure gas-liquid mixed refrigerant. This refrigerant is introduced into the third heat exchanger 4. Similarly, the refrigerant output from the second heat exchanger 7 is decompressed and expanded by passing through the second expansion valve 19 to become a low-temperature low-pressure gas-liquid mixed refrigerant, and is introduced into the fourth heat exchanger 6 .

  The refrigerant introduced into the third heat exchanger 4 lowers the temperature of the RA (air temperature upstream of the desiccant rotor 8) flowing through the second air flow path 13 returned from the room with evaporation, thereby causing a gas phase Change. The refrigerant leaving the third heat exchanger 4 is returned to the accumulator 2 via the four-way valve 3. At this time, the temperature of the air flowing through the second air flow path 13 is lowered by the evaporation of the refrigerant.

On the other hand, the refrigerant introduced into the fourth heat exchanger 6 lowers the temperature of the air leaving the desiccant rotor 8 of the second air flow path 13 with evaporation (the temperature of the air downstream of the desiccant rotor 8), Phase change to gas. The refrigerant leaving the fourth heat exchanger 6 merges with the refrigerant leaving the third heat exchanger 4 and is returned to the compressor 1 via the four-way valve 3 and the accumulator 2. At this time, the temperature of the air flowing through the second air flow path 13 is lowered by the evaporation of the refrigerant.
That is, in the humidification mode, the refrigerant output from the compressor 1 is returned to the compressor 1 via the first heat exchanger 5, the first expansion valve 18, and the third heat exchanger 4, and the second Two parallel flow paths are formed of the flow paths that return to the compressor 1 via the heat exchanger 7, the second expansion valve 19, and the fourth heat exchanger 6.

  Furthermore, in the desiccant rotor 8 of the second air flow path 13, the air whose temperature is lowered by the third heat exchanger 4, that is, the air whose relative humidity is raised is adsorbed by the adsorbent held by the elements of the desiccant rotor 8. Moisture in the air is reduced. At this time, the adsorbent of the desiccant rotor 8 causes an exothermic reaction by the hygroscopic action to heat the air. However, the air temperature is lowered again by the fourth heat exchanger 6 disposed downstream of the desiccant rotor 8. Then, the air is exhausted to the outside by the EA fan 9.

  In the desiccant rotor 8 of the first air flow passage 12, the air whose temperature has been increased by the first heat exchanger 5, that is, the air whose relative humidity has decreased is released by the adsorbent held by the elements of the desiccant rotor 8. Moisture in the air rises. At this time, the adsorbent of the desiccant rotor 8 causes an endothermic reaction by the moisture releasing action to cool the air. However, the air temperature rises again by the second heat exchanger 7 disposed downstream of the desiccant rotor 8. Then, the air is supplied into the room by the SA fan 10.

  As described above, in the humidification mode of the present invention, the first air flow passage 12 can supply the air having the increased humidity of the ventilation air into the room by the action of the refrigerant circuit 90 and the action of the desiccant rotor 8 It is.

(IV) [cooling mode]
The cooling mode is a mode in which the load of the air conditioner in the room increases when the outside air is supplied as it is at a high temperature and the refrigerant circuit 90 is operated to lower the air temperature and supply the room with air.

  The refrigerant circuit 90 operates in the same manner as the dehumidifying mode described above. That is, the first heat exchanger 5 and the second heat exchanger 7 of the first air flow passage 12 function as an evaporator and cool the OA to lower the temperature. The third heat exchanger 4 and the fourth heat exchanger 6 of the second air flow passage 13 function as a condenser, and the refrigerant circuit 90 discharges and exhausts the heat in the RA. Therefore, the flow of the refrigerant in the refrigerant circuit 90 is the same as in FIG.

  At this time, the desiccant rotor 8 does not rotate, and the exchange of water is not performed. That is, in the cooling mode, dehumidification due to dew condensation of the heat exchanger functioning as the evaporator of the first air flow passage 12 is eliminated, and only the temperature decrease in air is aimed.

(V) [warming mode]
The heating mode is a mode in which the load of the air conditioner in the room increases when the outside air is supplied as it is at a low temperature and the refrigerant circuit 90 is operated to raise the air temperature and supply the room.

  The refrigerant circuit 90 operates in the same manner as the humidification mode described above. That is, the first heat exchanger 5 and the second heat exchanger 7 of the first air flow passage 12 function as a condenser and heat the OA to raise the temperature. The third heat exchanger 4 and the fourth heat exchanger 6 of the second air flow passage 13 function as an evaporator, and the refrigerant circuit 90 recovers and exhausts the heat in the RA. Therefore, the flow of the refrigerant in the refrigerant circuit 90 is the same as in FIG.

  At this time, the desiccant rotor 8 does not rotate, and the exchange of water is not performed. That is, in the heating mode, only the temperature rise in the air of the first air flow passage 12 is aimed.

(VI) [total heat exchange mode]
When the outdoor humidity is extremely high or extremely low, the efficiency of the refrigerant circuit 90 is reduced in the dehumidifying mode, the humidifying mode, etc. in the ventilating apparatus 100 in which the refrigerant circuit 90 and the desiccant rotor 8 are combined. There is. On the contrary, the total heat exchanger has a characteristic that the amount of humidity exchange increases as the relative humidity difference increases. Therefore, in the case of such high humidity or low humidity, the total heat exchange mode is performed.

  Furthermore, when the indoor environment reaches the target value, the all heat exchange mode is implemented to improve energy saving. That is, in the total heat exchange mode, the refrigerant circuit is stopped as compared with the other modes, so energy saving is achieved.

  The total heat exchange mode is a mode in which ventilation is performed by exchanging sensible heat and latent heat with the total heat exchanger inside and outside the room. That is, the ventilator 100 does not have a total heat exchanger, but the same function as the total heat exchanger can be obtained by rotating the desiccant rotor 8 at high speed. By rotating the desiccant rotor 8 at a high speed, not only the exchange of water by the adsorbent but also the desiccant rotor 8 repeats heat accumulation and heat radiation of sensible heat, whereby sensible heat exchange in air can be performed.

  That is, in the total heat exchange mode, the main control unit 31 stops the refrigerant circuit 90. Furthermore, the main control unit 31 rotates the motor 20 of the desiccant rotor 8 at high speed.

[Summary of each operation mode]
The table | surface which put together the control state of the main-control part 31 of each above mode (I-VI) is shown in FIG. As shown in FIG. 6, when the operation mode is switched, the motor 20, the compressor 1, and the four-way valve 3 are switched to the states shown in the table. During that time, the EA fan 9 and the SA fan 10 continue to operate at all times to continue blowing air.

[Determination of operation mode I]
Next, the switching conditions of each mode in the main control unit 31 will be described with reference to the conditions of the air chart (temperature and humidity of the outside air) shown in FIG.

  FIG. 7 is a diagram for determining in which mode the ventilator 100 is operated from the outdoor temperature and humidity, that is, the outdoor temperature data To and the outdoor humidity data Ho obtained from the outdoor temperature sensor 23 and the outdoor humidity sensor 24.

  More specifically, the sensor input unit 31a of the main control unit 31 receives the outdoor temperature data To from the outdoor temperature sensor 23 and the outdoor humidity data Ho from the outdoor humidity sensor 24 disposed in the first air flow passage 12, and performs main control It is held in a memory (not shown) in the unit 31. Next, any one of the preset temperature set values t1 and t2, where t1 <t2 and the preset humidity set values h1, h2, h3, h4, where h1 <h2 <h3 <h4 are compared Decide the operation mode of

[All heat exchange mode (at low humidity)]
When the outdoor humidity data Ho is less than 0.0027 (kg / kg) (h1), that is, when (Ho <0.0027 (h1)), the total heat exchange mode is selected and operation is performed.

[Humidification mode]
The outdoor humidity data Ho is not less than 0.0027 (kg / kg) (h1) and less than 0.0066 (kg / kg) (h2), and the outdoor temperature data To is 27.0 (° C.) (t2) If less than (ie, when (0.027 ≦ Ho <0.0066 and To <27.0)), the humidification mode is selected and the operation is performed.

[Cooling mode]
The outdoor humidity data Ho is not less than 0.0027 (kg / kg) (h1) and less than 0.0111 (kg / kg) (h3), and the outdoor temperature data To is 27.0 (° C.) (t2) In the above case, that is, (0.027 ≦ Ho <0.0111 and 27.0 ≦ To), the cooling mode is selected and operation is performed.

[Heating mode]
The outdoor humidity data Ho is 0.0066 (kg / kg) (h2) or more and less than 0.0111 (kg / kg) (h3), and the outdoor temperature data To is 18.0 (° C.) (t1) In the case of less than 1, that is, (0.0066 ≦ Ho <0.0111 and To <18.0), the heating mode is selected and the operation is performed.

[Purge mode]
The outdoor humidity data Ho is 0.0066 (kg / kg) (h2) or more and less than 0.0111 (kg / kg) (h3), and the outdoor temperature data To is 18.0 (° C.) (t1) Above, in the case of less than 27.0 (° C.) (t2), that is, (0.0066 ≦ Ho <0.0111 and 18.0 ≦ To <27.0), the purge mode is selected and the operation is performed. .

[Dehumidification mode]
When the outdoor humidity data Ho is 0.0111 (kg / kg) (h3) or more and less than 0.0180 (kg / kg) (h4), that is, (0.0111 ≦ Ho <0.0180), Select the dehumidification mode and operate.

[All heat exchange mode (at high humidity)]
When the outdoor humidity data Ho is 0.0180 (kg / kg) (h4) or more, that is, when (0.0180 ≦ Ho), the total heat exchange mode is selected and operation is performed.

[Judgment of operation mode II]
As described above, the ventilator 100 determines the operation mode from the temperature and the absolute humidity of the OA from the outdoor temperature sensor 23 and the outdoor humidity sensor 24, and operates. However, in the dehumidifying mode, the humidifying mode, the cooling mode, and the heating mode, since the heat pump device shown in the refrigerant circuit 90 is operated, energy consumption is larger than in the other modes. During the above four modes of operation, in particular, the indoor environment is in an ideal state, for example, the indoor temperature and humidity indicated by the broken line (absolute humidity is 0. 0) indicated by the broken line in the air diagram (interior temperature and humidity) of FIG. If the temperature is within the range of 18.0 (° C.) to less than 27.0 (° C.) and the operation is continued in this state, the operation is continued at a temperature of not less than (kg / kg) and less than 0.0111 (kg / kg). Then, there is a possibility that the room will be in the state of excessive dehumidification or excessive humidification. That is, it deviates from the purpose of the present invention. In the first place, it is contradictory from the viewpoint of energy saving that the outside air is treated purposely and taken into the room.

Therefore, control of the main control unit 31 in the case as described above will be described with reference to an air graph shown in FIG.
FIG. 8 is a diagram showing the conditions under which the ventilator 100 shifts to the total heat exchange mode from the room temperature and the absolute humidity while operating in any of the dehumidifying mode, the humidifying mode, the cooling mode, and the heating mode. It is.

  If the sensor input unit 31a of the main control unit 31 is operating in any of the above-described dehumidification mode, humidification mode, cooling mode, and heating mode, the indoor temperature sensor 25 disposed in the second air flow path 13 Further, the indoor humidity data Hi is taken in from the indoor temperature data Ti and the indoor humidity sensor 26, and is stored in the memory in the main control unit 31. Next, while comparing preset temperature set values t3 and t4, where t3 <t4, and preset humidity set values h5 and h6, but h5 <h6, under the following conditions, total heat exchange Transition to mode

[Indoor target environment total heat exchange mode]
The indoor humidity data Hi is 0.0066 (kg / kg) (h5) or more and less than 0.0111 (kg / kg) (h6), and the outdoor temperature data Ti is 18.0 (° C.) (t3) As described above, in the case of less than 27.0 (° C.) (t4), that is, (0.0066 ≦ Hi <0.0111 and 18.0 ≦ Ti <27.0), the total heat exchange mode is selected and the operation is performed. I do.

  That is, as shown in FIGS. 4 and 5, the refrigerant circuit 90 which has been in operation is stopped, and the rotation of the desiccant rotor 8 is changed from the normal rotation to the high rotation.

[Specific control description]
The processing procedure of the main control unit 31 of the ventilation device 100 as described above will be described with reference to the flowcharts shown in FIGS.

  FIG.9 and FIG.10 is a flowchart which shows the process sequence which determines each operation mode shown in FIG. 7, and drive | operates. First, in step S1 of FIG. 9, the main control unit 31 operates the EA fan 9 and the SA fan 10.

  In step S2, the main control unit 31 detects the outdoor temperature To from the outdoor temperature sensor 23 by the sensor input unit 31a, and holds the value in the memory in the main control unit 31. Further, the outdoor humidity Ho is detected from the outdoor humidity sensor 24, and the value is held in the memory in the main control unit 31.

  In step S3, the main control unit 31 compares the outdoor humidity data Ho with h1 in the preset humidity setting values h1 to h4. If Ho <h1 (YES in step S3), the process proceeds to step S4. If Ho <h1 (NO in step S3), the process proceeds to step S5.

  In step S4, the main control unit 31 selects the total heat exchange mode and performs operation. Thereafter, the process proceeds to step S16 of FIG. 10 through the connection point C2.

  In step S5, the main control unit 31 compares the outdoor humidity data Ho with the humidity setting value h2. Further, the outdoor temperature data To is compared with t2 which is a preset temperature set value t1 and t2. If Ho <h2 and To <t2 (YES in step S5), the process proceeds to step S6. If Ho <h2 and To <t2 are not satisfied (NO in step S5), the process proceeds to step S7.

  In step S6, the main control unit 31 selects the humidification mode and performs operation. Thereafter, the process proceeds to step S16.

  In step S7, the main control unit 31 compares the outdoor humidity data Ho with the humidity setting value h3. Further, the outdoor temperature data To and the temperature set value t2 are compared. When Ho <h3 and t2 ≦ To (YES in step S7), the process proceeds to step S8. If Ho <h3 and t2 ≦ To (NO in step S7), the process proceeds to step S9.

  In step S8, the main control unit 31 selects the cooling mode and performs operation. Thereafter, the process proceeds to step S16.

  In step S9, the main control unit 31 compares the outdoor humidity data Ho with the humidity setting value h3. Further, the outdoor temperature data To and the temperature set value t1 are compared. When Ho <h3 and To <t1 (YES in step S9), the process proceeds to step S10. If Ho <h3 and To <t1 are not satisfied (NO in step S9), the process proceeds to step S11 in FIG. 10 via the connection point C1.

  In step S10, the main control unit 31 selects the heating mode and performs operation. Thereafter, the process proceeds to step S16.

  In step S11 of FIG. 10, the main control unit 31 compares the outdoor humidity data Ho with the humidity setting value h3. When Ho <h3 (YES in step S11), the process proceeds to step S12. If Ho <h3 (NO in step S11), the process proceeds to step S13.

  In step S12, the main control unit 31 selects the purge mode and performs operation. Thereafter, the process proceeds to step S16.

  In step 13, the main control unit 31 compares the outdoor humidity data Ho with the humidity setting value h4. When Ho <h4 (YES in step S13), the process proceeds to step S14. If Ho <h 4 (NO in step S 13), the process proceeds to step S 15.

  In step S14, the main control unit 31 selects the dehumidification mode and performs operation. Thereafter, the process proceeds to step S16.

  In step S15, the main control unit 31 selects the total heat exchange mode and performs operation. Thereafter, the process proceeds to step S16.

In step S16, the main control unit 31 determines the indoor environment, and performs processing when the target environment is achieved. Details will be described with reference to the flowchart of FIG.

  After the process of step S16 is completed, the process returns to step S2 of FIG. 9 through the connection point C3 and is executed.

Next, the detailed process of step S16 of FIG. 10 will be described with reference to FIG.
The process of step S16 of FIG. 10 first performs step S20.

  In step S20, the main control unit 31 determines whether the current operation mode is the dehumidification mode, the humidification mode, the cooling mode, or the heating mode. Then, in the case of the mode other than them (NO in step S20), the process ends and returns to the connection point C3 in FIG. In the case of any of the above modes (YES in step S20), the process proceeds to step S21.

  In step S21, the main control unit 31 detects the indoor temperature Ti from the indoor temperature sensor 25 by the sensor input unit 31a, and holds the value in the memory in the main control unit 31. Further, the indoor humidity Hi is detected by the indoor sensor 26, and the value is held in the memory in the main control unit 31. Next, the process proceeds to step S22.

  In step S22, the main control unit 31 compares the indoor humidity data Hi with the preset humidity setting values h5 and h6. Further, the indoor temperature data Ti is compared with preset temperature setting times t3 and t4. If h5 ≦ Hi <h6 and t3 ≦ Ti <t4 (YES in step S22), the process proceeds to step S23. If h5 ≦ Hi <h6 and t3 ≦ Ti <t4 (NO in step S22), the process ends and the process proceeds to connection point C3 in FIG.

  In step 23, the main control unit 31 selects the total heat exchange mode and performs operation. Thereafter, the process proceeds to step S21 of FIG.

[Description of effect]
As described above, in the ventilating apparatus 100 according to the present embodiment, the dehumidifying mode, the humidifying mode, the cooling mode, the heating mode, the total heat exchange mode, and the purge mode are appropriately selected according to the outdoor temperature and humidity. By doing this, the load on the air conditioner in the room can be reduced, and a ventilation system with excellent comfort environment and energy saving can be obtained.

  Furthermore, the ventilation device 100 does not have communication means with the indoor air conditioner, and can operate independently and can be easily implemented.

  Furthermore, when the room becomes a target environment during operation in any of the dehumidification mode, humidification mode, cooling mode, and heating mode, the ventilator 100 changes to the total heat exchange mode and operates. In addition, energy saving is further enhanced.

  Furthermore, the efficiency of the refrigerant circuit 90 may decrease and the dehumidifying ability may decrease when the outdoor is particularly humid, in which case the refrigerant circuit 90 is stopped and the desiccant rotor 80 is rotated at high speed. Sensible heat exchange becomes possible, and even in high humidity, exchange of sensible heat and latent heat becomes possible.

  As mentioned above, although the ventilating apparatus of this invention was demonstrated based on embodiment, this invention is not limited to this, The structure of each part can be substituted to the arbitrary structure which has the same function. In particular, numerical values shown as specific values in the embodiment can be implemented by being appropriately changed according to the implementation situation.

8 desiccant rotor (moisture adsorption means)
12 first air flow path 13 second air flow path 23 outdoor temperature detection means 24 outdoor temperature detection means 31 control unit 90 refrigerant circuit 100 ventilation device I purge mode II dehumidification mode III humidification mode IV cooling mode V heating mode VI total heat Exchange mode Ho outdoor detection humidity To outdoor detection temperature

Claims (3)

A first air flow passage for supplying air outside the room into the room;
A second air flow path for exhausting indoor air to the outside of the room;
An outdoor temperature detection means for detecting an outdoor temperature and an outdoor humidity detection means for detecting an absolute humidity at an inlet of the first air flow path;
It is disposed straddling the first air flow passage and the second air flow passage, and adsorbs the moisture of the air flowing in one of the first air flow passage and the second air flow passage, Rotary moisture adsorbing means for releasing moisture to air flowing in the flow path;
A refrigerant circuit that heats the air flowing through one of the first air flow passage and the second air flow passage and cools the air flowing through the other;
A control unit that performs control;
A dehumidifying mode in which the water adsorption means is rotated and the refrigerant circuit is operated to cool the first air flow path;
A humidification mode in which the water adsorption means is rotated and the refrigerant circuit is operated to heat the first air flow path;
A cooling mode in which the water adsorption means is stopped and the refrigerant circuit is operated to cool the first air flow path;
A heating mode for stopping the water adsorption means and operating the refrigerant circuit to heat the first air flow path;
A total heat exchange mode in which the water adsorption means is rotated at high speed, the refrigerant circuit is stopped, and total heat exchange is performed between the first air flow path and the second air flow path;
The water adsorption means and a purge mode in which the refrigerant circuit is stopped and only ventilation is performed,
The control unit
Humidity set values h1, h2, h3 and h4, where (h1 <h2 <h3 <h4), and
The temperature set values t1 and t2, where (t1 <t2), are set in advance,
From the detected humidity Ho value obtained from the outdoor humidity detecting means and the detected temperature To value obtained from the outdoor temperature detecting means,
If Ho is less than h1, select the total heat exchange mode,
If Ho is h1 or more and less than h2, To is less than t2, select the humidification mode,
When Ho is h1 or more and less than h3, To is t2, or more, select the cooling mode,
If Ho is more than h2 and less than h3 and To is less than t1, select the heating mode,
If Ho is h2 or more and less than h3, To is t1 or more and less than t2, select the purge mode,
If Ho is more than h3 and less than h4, select the dehumidification mode,
If Ho is h4 or more, select the total heat exchange mode,
Operating in any of the selected modes,
Ventilator characterized by. The ventilating apparatus includes an indoor temperature detection means for detecting a temperature in the room and an indoor humidity detection means for detecting an absolute humidity at an inlet of the second air flow path.
The control unit
Humidity set values h5 and h6, where (h5 <h6) and
The temperature set values t3 and t4, where (t3 <t4) are set in advance,
While operating in any of the humidification mode, the cooling mode, the heating mode, and the dehumidification mode,
And, according to the detected humidity Hi value obtained from the indoor humidity detecting means and the detected temperature Ti value obtained from the indoor temperature detecting means,
2. The ventilator according to claim 1, wherein the total heat exchange mode is selected and operated when Hi is h5 or more and less than h6 and Ti is t3 or more and less than t4. A first air flow passage for supplying air outside the room into the room;
A second air flow path for exhausting indoor air to the outside of the room;
Outdoor humidity detection means for detecting absolute humidity outside the room at the inlet of the first air flow path;
It is disposed straddling the first air flow passage and the second air flow passage, and adsorbs the moisture of the air flowing in one of the first air flow passage and the second air flow passage, Rotary moisture adsorbing means for releasing moisture to air flowing in the flow path;
A refrigerant circuit which cools the air flowing through the first air flow passage and heats the air flowing through the second air flow passage;
A control unit that performs control;
The control unit
At least, the moisture adsorption means is rotated, and the refrigerant circuit is operated to operate in the dehumidifying mode for cooling the first air flow path,
When the detected humidity obtained from the outdoor humidity detection means exceeds a predetermined value, the water adsorption means is rotated at high speed to stop the refrigerant circuit, and the first air flow path and the second air flow path are stopped. Transitioning to full heat exchange mode between all the heat exchange modes, and operating
Ventilator characterized by.

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