JPS6152538A - Ventilator - Google Patents

Abstract

PURPOSE:To make it possible to carry out a heat recovery ventilation by the low output operation of a heat pump due to the natural ventilation at night-time where the ventilation load is small by providing a condenser at a lower conducting port and an evaporator at an upper conducting port respectively, and enabling the changeover of the heat pump to the low output operation. CONSTITUTION:Conducting ports which communicate the indoor side and the outdoor side with each other are provided at the upper part and the lower part. A condenser 4 is provided in the lower conducting port 12, and an evaporator 2 in the upper conducting port 18. Further, on at least one of these conducting ports is provided a blower 7. The condenser 4 and the evaporator 2 are connected to each other by means of a coolant pipeline of a heat pump including a compressor 1 and an expansion valve 3. When the blower comes to a stop, a natural convention occurs due to the relation between the room temperature and the external air temperature to enable the heat recovery ventilation in such a natural ventilation. Therefore, a bypass valve 5 is opened to reduce the turn-down quantity of the coolant. When the ventilator is used in a case where the ventilation load is small such s during sleeping, the blower is stopped and the heat pump is changed over to the low output operation, whereby the ventilation of high efficiency can be carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a heat recovery type ventilation system used in houses and the like.

[Background technology]

In general, indoor ventilation uses ventilation Luro or heat recovery ventilation fans built into the walls or windows of the house, and with regard to dehumidification,
A floor-standing dehumidifier using a near conditioner or heat pump was used.

Therefore, each function has its own VC, so ventilation,
In order to satisfy all functions such as dehumidification and circulation, there were problems such as expanding the installation space and increasing the price. Therefore, there is a problem that the heat recovery efficiency is limited to about 70%, and furthermore, in cold regions, there is a problem that the heat exchange efficiency is significantly reduced due to dew condensation and freezing on the heat exchange element.

[Purpose of the invention]

The purpose of this invention is to provide ventilation, dehumidification, and circulation functions, to save space in the device, to reduce the cost, and to enable operation according to the ventilation load. C [Representation of the Invention] The ventilation device of the present invention is provided with a conduction port for communicating between the indoor and outdoor areas in the upper T, and the upper conduction port. A condenser is installed at the top, an evaporator is installed at the upper opening, and a blower is installed at at least one of these openings. In addition, the condenser and evaporator are connected by a heat pump refrigerant pipe including a compressor and an expansion valve, and a means for switching between steady capacity operation and low capacity operation according to the ventilation load of the heat pump is provided. That is.

An embodiment of the present invention will be described based on FIGS. 1 and 2. FIG. 1 is an explanatory diagram showing the ventilation state in this embodiment, and FIG. 2 is an explanatory diagram showing the dehumidification or circulation state B.

In FIG. 1, 20 is the heat recovery type ventilation device with dehumidification function of this embodiment, which is attached to the outer wall or window 16.
23 indicates indoors, and 24 indicates outdoors. In addition, 1 is the compressor of the heat pump, 2 is the evaporator built in the upper communication port 18, and 3 is the cavity valve (expansion valve).
, 411″1: A condenser built in the lower communication port 19. 5 is a bypass valve of the capillary tube,
It opens during low capacity operation of the heat pump to reduce the amount of refrigerant throttling. From condenser 4 to cavillary chi
The refrigerant pipe 6 of the refrigerant tube 30 is discharged from the bottom of the condenser 4. This is because the liquid refrigerant liquefied in the condenser 4 is sent to the cavity tube 3 or the bypass valve 5 to cause the heat pump to operate normally. That is,
This is because if the refrigerant is piped to the upper gold cavillary tube 3 of the condenser 4 and sent to the evaporator 2 as vapor, the heat transfer ability will decrease, whereas if it is sent as a liquid, the heat transfer ability will increase. .

7.7' is the direction of air flow when switching between forward and reverse rotation? Air blower that can be changed, 8 is heat pump refrigerant piping, 9
and 10 are a condensation water tray and a drain pipe, 11 and 13 are intake and exhaust ports on the outdoor side, and 12 and 14 are intake and exhaust ports on the indoor side. Dampers 15 and 15' open and close the dehumidification circuit duct 17 connecting the upper conduction port 18 and the lower conduction port 19.

Next, the operation of this embodiment will be explained.

When the ventilation load is large during heating, outside air is brought into the room by the air flow from the outdoor exhaust port 13 to the lower conductor 19 to the blower 7' to the indoor exhaust port 14 as shown by arrow A.
Is the indoor air flowing through the indoor air outlet 12 - the blower 7 - + the upper conductor 18 -> the outdoor air outlet 11? Discharge.

In this case, by constructing a refrigerant circuit of compressor 1 → condenser 4 → cabillary reach knee 3 → evaporator 2 → compressor 1 using a heat pump, indoor heat discharged from the upper communication port 18 is transferred to the evaporator. The outside air collected at 2 and injected through the lower conduction port 19 can be heated by the condenser 4 and sent into the room as warm fresh air.

On the other hand, when the ventilation load is large during cooling, the rotational direction of the blowers 7 and 7' is completely reversed, as shown by arrow B, and the air blows from the outdoor suction hole 11 to the upper heart passage hole 18 to the blower 7 to the blowing chamber. Exit 12
With the air flow, the outside air 71 [-intake, indoor exhaust port 14--to be sent to the machine 7'-lower ventilation port 19-outdoor exhaust port 13
The indoor air ff: is discharged to the outside with the flow of air.

At this time as well, the heat pump forms a refrigerant circuit of compression g31 - condenser 4 -> cavillary cheese 3 - evaporator 2 - compressor 1, and the refrigerant is introduced into the room by the evaporator 2 through the upper communication port 18. By removing heat from the warm outside air and releasing this heat to the indoor air that is released outside by the condenser 4 of the lower conduction port 19, the fresh outside air taken into the room can be cooled.By the way, the blower 7, When blower 7' is stopped, natural convection occurs due to the relationship between indoor temperature and outside temperature, and air flows in the same direction as when air blower 7.7' is operated at each ventilation port 18.19 during both heating and cooling. flows.

In order to enable heat recovery ventilation under such natural ventilation conditions, the evaporator 2. A means for switching the heat pump to low-capacity operation as the air volume in the condenser 4 decreases is required. Tsuma υ,
It is necessary to control the refrigerant cycle of the heat pump by reducing the operating capacity of the compressor 1 or by reducing the discharge gas pressure. Bypass valve 5 is one of the controls.
Open to reduce the amount of refrigerant throttling.

By operating the compressor 1 at a low capacity and adjusting the amount of throttle, the noise is low and the heat recovery efficiency is high. The refrigerant temperature is higher than the air temperature, and the difference in temperature is large, improving efficiency), and running costs can also be lowered. For this reason, it is the best ventilation device to use in bedrooms and other places where the noise of the blower at night and the vibration noise of the compressor motor are a problem9. By stopping 7.7 and switching the heat pump from steady capacity operation to low capacity operation, ventilation can be performed with less noise and high heat recovery efficiency.

FIG. 2 shows the dehumidifying state in this embodiment, in which the dampers I 5 and 15' that were blocking the openings at both ends of the dehumidifying circuit duct 17 are opened, and the outdoor suction port 11 is rotated approximately 90'. and closes with the outdoor exhaust port 13. In this state, the ventilation i? A7.7'e Rotate forward to indoor 23-indoor exhaust port 14-? Lower conduction RO 19 - Dehumidification circuit duct 17 → Upper continuity RO 18 -? Indoor translation 12-p The air circulation circuit 7r of the indoor 23 is constructed. Then, the heat pump is operated normally. In this case, air at room temperature is completely heated in the condenser 4, cooled in the evaporator 2, dew condensed, and dried air is returned to the room temperature in the condenser 4 (3).
Return it within yourself. The condensed water is discharged from the drain pipe 10 to the chamber 1 via the condensed water receiver 9.

In addition, dampers 15 and 15' and blowers 7 + 7'
If the heat pump is started and stopped with the dehumidification circuit as described above, it can be used as a circulator for indoor air.

Note that it is also possible to use an expansion valve with a wide throttle adjustment range in place of the bypass valve 5 to fully open the expansion valve in low capacity operation.

〔Effect of the invention〕

According to this invention, a condenser is installed in the lower ventilation port and an evaporator is installed in the upper ventilation port, making it possible to switch the heat pump to low-capacity operation by 5 or 7 times. Heat recovery ventilation is possible by operating the heat pump at low capacity with natural ventilation.

As a result, we are able to save space and reduce the amount of equipment required.
By operating the pump according to the ventilation load, it is possible to reduce noise and improve heat recovery efficiency.C

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the heat recovery ventilation state in one embodiment of the present invention, and Fig. 2 is an explanatory diagram of the dehumidification state. ... Cavillary cheese (expansion valve), 4... Coagulator, 5... Kui-kusu valve, 7.7'... Blower, 15... Dan/ku, 17 ...Dehumidification circuit duct, 18...Upper conduction port, 19...Lower conduction port Fig. 1

Claims (1)

[Claims] Conduction ports are provided at the top and bottom to connect the indoor and outdoor areas,
A condenser is installed in the lower conduction port, an evaporator is installed in the upper conduction port, and an air blower is provided in at least one of these communication ports, and the condenser and evaporator are connected to a refrigerant of a heat pump including a compressor and an expansion valve. A ventilation system connected by piping and provided with means for switching between steady capacity operation and low capacity operation according to the ventilation load of the heat pump.