JPH0317447A - Heat pump cooling, heating and ventilation system - Google Patents

Abstract

PURPOSE:To prevent a cooled air or a heated air from being flowed out into an adjoining room and provide an efficient cooling, heating and ventilation system by a method wherein means for controlling an amount of air at a discharging air blower of a heat taking out device and a suction air blower is provided, and an odor sensing means is provided between a discharging air inlet port of the heat retrieval device and a full heat exchanger. CONSTITUTION:Due to supplying a hot air discharged from an interior part 1 to a suction duct 19 of a heat source device 6 through branch ducts 21, 22 and a communicating duct 23, a temperature of air passing through a heat exchanger 17 becomes higher than a surrounding air temperature and a thermal efficiency of the heat source device 6 is increased. For example, the branch duct 21 is arranged near a heat retrieving device 5, the branch duct 22 is arranged near the heat source device 6, a length of the communication duct 23 is arranged in a short length. It a duct size is made as large as possible to reduce an air flow resistance, almost all the hot discharged air can be supplied from the interior as the suction air of the heat source device 6 and then a heating capability is increased. Also in case of cooling operation, a low temperature air discharged from the interior 1 is supplied to the heat source device 6 in quite the same manner at that of the heating operation.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a heat pump air conditioning/heating/ventilation system that uses a heat pump to perform all outside air cooling and heating, and also performs ventilation with a heat extraction side unit. (Conventional technique fr) In recent years, heating and cooling systems using heat pumps have introduced indoor/outdoor units that are installed on the ceiling of a building to increase the effective indoor space and improve the aesthetics of the room.
Furthermore, heating and cooling ventilation systems that have ventilation functions in addition to cooling and heating functions are being put into practical use. FIG. 6 is a configuration diagram of an embodiment of a conventional heat pump air conditioning/heating/ventilation system. In the figure, 1 indicates the space to be cooled and heated inside the building (hereinafter referred to as indoor space), 2 indicates the inside of the ceiling partitioned by the ceiling wall 3, and 4 indicates the outer wall of the building. As shown in the figure, a heat extraction side unit (so-called indoor unit) 5 and a heat source side unit (so-called outdoor unit) 6 of the heat bomb are arranged inside a building.

The refrigerant circuit of the heat pump is a well-known circuit, and its explanation will be omitted. Since the heat extraction side unit 5 has a ventilation function, it is equipped with an intake air blower a7 and an exhaust air blower 8, and performs heat exchange between intake and exhaust air via a total heat exchanger 9 to recover indoor exhaust heat.

10 is a refrigerant heat exchanger that cools or heats intake air. In such a configuration, outdoor air is sucked by the blower 7 from the duct 1l of the extraction side unit 5, passes through the duct 12, and is supplied into the room from the outlet 13.

Indoor air passes through the duct 15 from the suction port 14, is sucked by the air blower 8, and is drawn into the duct 15! 6 and is exhausted outdoors.

Therefore, even during cooling/heating operation, fresh outdoor air is always available.
It passes through the total heat exchanger 9 and is supplied to the room 1 while recovering indoor exhaust heat.

On the other hand, the heat source side unit 6 is composed of a heat source side refrigerant heat exchanger 17, an air blower 18, etc., and a duct 19 supplies heat! ! The structure is such that outdoor air is sucked into the side unit 6 and exhausted to the outdoors again through the duct 2o.

In such a system, the intake and exhaust of both units are connected by ducts, which requires a large external static pressure.
Further, in the heat extraction side unit 5, the intake blower 7 is also used as an indoor blower during heat bomb operation.

In the ventilation operation when the heating and cooling operation is stopped, the compressor is stopped and the blower 7.8 of the heat extraction side unit 5 is operated.

Due to this configuration, fresh outdoor air is always available,
The indoor side can be cooled and heated, exhaust heat can be recovered while the indoor side is being exhausted, and at the same time, the indoor air can be ventilated while the heating and cooling are stopped.

[The problem that the invention attempts to solve! ! ! ]

However, in conventional all-outside air heating and cooling ventilation systems,
During both cooling and heating, outdoor air is heated or cooled by the heat exchanger 10 of the direct heat extraction side unit 5 and then supplied to the indoor room 1. Since the exhaust heat is directly released outdoors, the heat load is inevitably greater than that of a regular heat pump air conditioner that recycles indoor air.

Furthermore, since this system is required not to impair the effective space inside the room, the installation location is restricted, and it is often installed in the ceiling where the space is small. Therefore, the space for passing the duct is limited, and the duct will have to be made smaller. In order to satisfy this requirement, the reality is that the necessary air volume must be secured by increasing the external static pressure of the blower or by installing an auxiliary blower. In this case, not only does the running cost naturally increase, but installation of the auxiliary blower also makes construction difficult, increasing the amount of duct work and increasing the overall construction cost.

In addition to this, if there is an opening on the border with the next room, install doors or partitions to prevent cooled or heated air or air with odors from flowing into the next room. Alternatively, it is necessary to install an exhaust duct for deodorizing ventilation in the adjacent room, which not only increases costs, but also to compensate for the lack of deodorizing effect in deodorizing ventilation operation.
There were problems such as increasing the external static pressure of the exhaust blower, which increased the capacity of the blower drive motor.

This invention was made in order to solve the problems of the conventional example as described above, and by effectively utilizing the exhaust heat held by the exhaust from the room and reusing it as intake air for the heat source side unit, The objective is to obtain an efficient heating and cooling ventilation system that can increase heating and cooling efficiency, improve the space factor, and prevent odors generated indoors and cooled or heated air from flowing into adjacent rooms.

(Means for Solving the Problems) Therefore, the heat pump heating and cooling ventilation system according to the present invention is composed of a heat source side unit and a heat extraction side unit, and a total heat exchanger is installed inside the heat extraction side unit. , and the air supplied to each unit is connected by a duct, and all outside air is cooled and heated by a heat pump, and all air is cooled by an exhaust blower installed in the heat extraction side unit, both during cooling and heating and when cooling and heating is stopped. In a heat pump heating and cooling ventilation system that performs heat exchange ventilation, connect the unit outlet side exhaust duct of the heat extraction side unit to the unit intake side duct of the heat source side unit, and control the air volume of the exhaust blower and intake blower of the heat extraction side unit. The above objective is achieved by providing a means for detecting an odor between the exhaust side inlet of the heat extraction side unit and the gold heat exchanger.

[Effect]

In the heat bomb air conditioning/heating ventilation system according to the present invention configured as described above, all or part of the exhaust air from the room exhausted from the heat extraction side unit is passed through the air intake duct of the heat source side unit by the communication duct. , is supplied to the heat source side unit, and is controlled by means for controlling the exhaust amount by the exhaust air blower of the heat extraction side unit to be larger than the intake air amount of the intake air blower, and when the odor detection means detects the odor, the odor is detected. Based on the output of the signal, the exhaust air volume of the exhaust air blower of the heat extraction side unit is controlled by the control means, and the deodorizing ventilation operation is efficiently performed.

(Example) This example will be explained below based on the figures. (Configuration) FIG. 1 is a configuration diagram of a heat bomb air-conditioning/ventilation system that is an embodiment of the present invention. Note that the same or equivalent parts as in the conventional example are represented by the same reference numerals.

In FIG. 1, 21 is a branch duct provided in the middle of the outlet side exhaust duct 16 of the heat extraction side unit 5, 22 is a branch duct provided in the middle of the intake duct l9 of the heat source side unit 6, and 23 is a branch duct provided in the middle of the air intake duct 19 of the heat source side unit 6. This is a communication duct that connects the branch ducts 21 and 22. Thereby, the exhaust gas from the heat extraction side unit 5 is configured to reach the air intake duct 19 of the heat source side unit 6 from the duct 16 through the communication duct 23, and to be sucked into the heat source side unit 6.

(Operation) In such a configuration, in the heating and cooling operation using the heat bomb, the blower 7 of the heat extraction side unit 5 and the blower 18 of the heat source side unit 6 are operated to cool or heat the room 1. Further, when the blower 8 of the heat extraction side unit 5 is operated, the indoor air is sucked in by the blower 8 and has a ventilation function to be exhausted.

Here, due to the configuration of the duct air path, the exhaust duct l6 of the heat extraction side unit 5 is on the pressure side of the blower 8, so the pressure is higher than atmospheric pressure, and the air intake duct l9 of the heat source side unit 6 is the air blower @ 18 on the suction side, the pressure is lower than atmospheric pressure.

Therefore, the air sucked from the room 1 by the blower 8 is
It forms an air path that branches off at the branch duct 2l, passes through the communication duct 23, reaches the branch duct 22, and enters the heat source side unit 6 via the heat source side intake duct 19.

In such a configuration, for example, during heating, the air temperature in the room 1 is normally maintained at about 22°C, and if the outdoor air temperature is 0°C, the heat exchange efficiency of the total heat exchanger 9 is usually about 80%, so the air exhausted from room 1 is the duct! It is about 17℃ within 6 degrees.

By the way, in the conventional heat bomb air conditioning/heating/ventilation system described above, this 17° C. exhaust gas is directly released outdoors. However, in the heat bomb air conditioning/heating ventilation system according to this embodiment, in order to supply high-temperature air discharged from the room 1 to the intake duct 19 of the heat source side unit 6 through the branch ducts 21 and 22 and the communication duct 23,
The temperature of the air passing through the heat exchanger 17 of the heat source side unit 6 becomes higher than the outside air temperature, and therefore the thermal efficiency of the heat source side unit 6 increases. In this case, the smaller the flow path resistance of the duct, the higher the thermal efficiency of the heat source side unit 6 becomes. For example, the branch duct 21 is provided near the heat extraction side unit 5, the branch duct 22 is provided near the heat extraction side unit 6, and the length of the communication duct 23 is shortened. By making the duct size as large as possible to reduce the air flow resistance, most of the high temperature exhaust air from the room 1 can be supplied as intake air to the heat source unit 6. The heating efficiency of heat bombs has improved, and the heating capacity has increased by 1
It increases by about 0-30%. During cooling, the process is exactly the same; low-temperature air exhausted from the room 1 is sent to the heat source side unit 6.
The cooling capacity of the heat pump increases,
The power consumption of the compressor under the same load can be reduced.

Normally, when the thermostat is turned off during cooling/heating operation or when heating/cooling is not required, the blower 18 of the heat source side unit 6 is also stopped at the same time as the compressor is stopped. However, when only ventilation is performed, the heat extraction side unit Operate blowers 7 and 8 of 5. In this case, it passes through the duct 11 as in the conventional example,
Fresh air is supplied to the room 1, and ventilation air is
An air path that passes through the branch duct 21 and is exhausted to the outdoors from the exhaust duct 16, and an air path that passes through the communication duct 23, the ducts 19 and 20, and is exhausted to the outdoors are configured.

FIG. 2 shows a second embodiment of the heat bomb air conditioning and ventilation system of the present invention.

In this embodiment, the exhaust duct 1 of the heat extraction side unit 5
6 is directly connected to the branch duct 22 of the intake duct 19 of the heat source side unit 6, and the entire amount of exhaust gas from the heat extraction side unit 5 is supplied as intake air to the heat source side unit 6. In this case, during ventilation operation, the exhaust from the room 1 is routed through the outlet side exhaust duct l6 of the heat extraction side unit 5.
The air then reaches the branch duct 22, passes through the heat source side unit 6, and is exhausted outdoors from the exhaust duct 19 of the heat source side unit 6.

Therefore, the exhaust duct 16 of the heat extraction side unit 5 does not need to be installed all the way to the outer wall of the building, making it possible to shorten the length of the duct and eliminating the need to provide exhaust holes on the outer wall of the building, reducing construction time and construction costs. It is possible to improve the aesthetic appearance of the shrine and the building's outer wall.

FIG. 3 further shows a third embodiment according to the present invention,
In the duct configuration explained in Fig. 2, the blower 8 for exhausting indoor air in the heat extraction side unit 5 is omitted, and the air flow in the duct during both cooling/heating and ventilation is as shown in Fig. 2. The flow is similar to that described. That is, it is natural that the blowers 7 and 18 in both units are operated during cooling and heating, but also during ventilation, the blower 18 of the heat source side unit 6 is operated and indoor air is sucked by the blower 18. It exhausts the air outdoors.

In this case, compared to the embodiments shown in FIGS. 1 and 2, the exhaust air pressure is reduced by omitting the exhaust air blower 8 of the heat extraction side unit 5, so the air blower 18 of the heat source side unit 6 is
In this case, a blower that has high external static pressure and can secure the necessary air volume may be used.

As a result, the number of blowers in the heat extraction side unit 5 can be reduced to one, so that in addition to the above-mentioned effects, the cost can be reduced as the heat extraction side unit 5 is made smaller and lighter.

FIG. 4 shows a fourth embodiment of the present invention, and FIG. 5 is a table showing the operation modes and wind mode of the intake blower 7 and exhaust blower 8 of the heat extraction side unit 5 in this embodiment. .

In FIG. 4, 2l is an adjacent room, 22 is a passage, 23 is a partition wall with the adjacent room, and 24 is an odor detection means provided between the exhaust side of the heat extraction side unit 5 and the total heat exchanger 9. It is a sensor, and 25 is a controller which is means for controlling the air volume of the intake air blower 7 and the exhaust air blower 8 of the heat extraction side unit 5.

Next, the operation in this embodiment will be explained.

In this embodiment, air flow during cooling/heating and ventilation operations by the heat pump is exactly the same as in the first embodiment, so detailed explanation will be omitted.

Here, the intake air blower 7 and exhaust air blower 8 of the heat extraction side unit 5 are controlled by the controller 25 according to the operation mode shown in FIG. That is, during ventilation operation, the air volume mode of the exhaust blower 8 is strong, and the air volume mode of the intake air blower 7 is medium, so the exhaust volume > intake air volume, and the air pressure in the room 1 is lower than the air pressure (atmospheric pressure) in the adjacent room 21. The odor from room 1 above is from the adjoining room 2.
The flow of air inside the building is in the direction of arrow A.

In addition, during cooling/heating operation, at the start of operation with a high cooling/heating load, the air volume mode of the intake blower 7 is set to strong to ensure cooling/heating capacity, and the exhaust volume and intake air volume are equal, but since the proportion of time in actual operation is small. Not a problem.

Further, when the air volume mode of the intake air blower 7 becomes medium, the air volume mode of the exhaust air blower 8 becomes strong, and when the air volume mode of the intake air blower 7 becomes weak, the air volume mode of the exhaust air blower 8 becomes medium. In other words, the air pressure in the room 1 becomes lower than the air pressure (atmospheric pressure) in the adjacent room 2L, as in the case of ventilation, because the amount of exhaust air is greater than the amount of intake air, so the odor and cooled or heated air in the room 1 flows into the adjacent room 21. There is no outflow, and the air flow inside the building is in the direction of arrow A.

During this time, when the odor sensor 24 detects the odor of the exhaust gas flowing around the odor sensor 24, the controller 25 uses this detection signal to set the air volume mode of the exhaust blower 8 to high to perform deodorizing ventilation. When the odor disappears, the air volume mode of the exhaust blower 8 is returned to the normal operation mode, and the intake/exhaust heat exchange efficiency in the total heat exchanger 9 is drastically reduced. Able to operate heating and cooling ventilation systems including deodorizing ventilation.

As a result, odor-laden air, cooled or heated air flows from room 1 to neighboring room 2! Since it is possible to prevent air from leaking into the air, the coefficient of performance of the system is improved and a comfortable air-conditioned space free from odor pollution can be realized. As a result, it is no longer necessary to provide a door or partition in the passage 22 to prevent the outflow of odors and cooled or heated indoor air as in the past, or to provide an exhaust duct for deodorizing ventilation (not shown) in the adjacent room 2l. This can greatly reduce the amount of work required.

Furthermore, as another embodiment, in order to make the exhaust air volume from the room larger than the intake air volume, the cross-sectional area of the exhaust ducts 15 and 16 of the heat extraction side unit 5 is made larger than the cross-sectional area of the intake ducts 11 and 12. Or, by making the length of the exhaust duct 15 shorter than the length of the intake duct 11, the exhaust duct 15.16
The pressure loss of the air intake duct 11.
By making the capacity of the airflow larger than the capacity of the intake air supply fiJl7, the volume of exhaust air from the room l can be made larger than the volume of intake air, and the heating and cooling ventilation system, including deodorizing ventilation, can be operated efficiently.

〔Effect of the invention〕

As explained above, according to the present invention, the outlet side exhaust duct of the heat extraction side unit is connected to the air intake duct of the heat source side unit, so that the temperature of the intake air to the heat exchanger of the heat source side unit can be adjusted. During cooling, the temperature can be lowered than the outdoor air temperature, and during heating, it can be raised higher, improving the heating and cooling capacity of the heat pump and reducing the power consumption of the compressor.

Further, when the cooling and heating capacity is the same as that of the conventional example, the external static pressure of the blower of the heat source side unit can be reduced, so the blower can be made smaller and have a lower capacity.

Furthermore, when it is necessary to lengthen the intake and exhaust ducts of the heat source side unit due to constraints on the installation location of the system, conventionally,
The present invention eliminates the need for an auxiliary blower in the middle of the intake or exhaust duct, thereby shortening the construction period and reducing construction costs.

In addition, since the exhaust air volume of the exhaust fan of the heat extraction side unit is controlled to be greater than the intake air volume of the intake fan, it is possible to not only efficiently exhaust odors in each mode of cooling/heating and exhaust operation, but also to It is possible to prevent air from flowing into adjacent rooms and improve the coefficient of performance of the heat pump air conditioning/heating/ventilation system. Furthermore, by controlling the exhaust air volume based on the detection signal of the odor detection means, it is possible to create a comfortable air-conditioned space without odor pollution, prevent insufficient deodorization and excessive ventilation, and create an efficient deodorizing ventilation and heating/cooling ventilation system. Able to drive.

Therefore, it is no longer necessary to install doors or partitions that were conventionally provided to prevent odor-contaminated air from flowing into adjacent rooms, or to install exhaust ducts for deodorizing ventilation into adjacent rooms.
The construction costs required for this can also be reduced.

[Brief explanation of drawings]

Fig. 1 is a block diagram of a heat pump air conditioning/heating/ventilation system according to an embodiment of the present invention, Fig. 2 is a block diagram of a heat pump air conditioning/heating/ventilation system according to a second embodiment of the invention, and Fig. 3 is a block diagram of a heat bomb air conditioning/heating/ventilation system according to a second embodiment of the invention. Fig. 4 is a block diagram of a heat pump air conditioning/heating/ventilation system according to an example; Fig. 4 is a block diagram of a heat pump air conditioning/heating/ventilation system according to a fourth embodiment; Fig. 5 shows indoor air intake and exhaust air volume motes in each operation mode of the above system. FIG. 6 is a configuration diagram of a conventional heat pump air conditioning/heating/ventilation system. 11 is a heat extraction side unit intake duct, 16 is a heat extraction side unit exhaust duct, 19 is a heat source side unit intake duct, 20 is a heat source side unit exhaust duct, 21.22 is a branch duct, 23 is a communication duct, and 24 is an odor sensor. , 25
is a control device. In addition, in the figures, the same or corresponding parts are represented by the same reference numerals.

Claims (2)

[Claims] (1) Consisting of a heat source side unit and a heat extraction side unit, a total heat exchanger is installed inside the heat extraction side unit,
The air supplied to each unit is connected by a duct, and all outside air is cooled and heated by a heat pump, and all of the heat is removed by an exhaust blower installed in the heat extraction side unit, both during cooling and heating and when cooling and heating is stopped. In a heat pump heating and cooling ventilation system that performs exchange ventilation, the exhaust duct on the exit side of the heat extraction side unit is
A heat pump heating and cooling ventilation system characterized by being connected to a unit intake side duct of a heat source side unit. (2) Means for controlling the air volume of the exhaust air blower and intake air blower of the heat extraction side unit is provided, and odor detection means is provided between the exhaust side inlet of the heat extraction side unit and the total heat exchanger. The heat pump heating and cooling ventilation system according to claim 1.