JP7030172B1 - Heat pump type air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a heat pump type air conditioner having improved comfort and energy saving. An air heat source heat pump (1) having a heat supply heat exchanger (6) and a heat source heat exchanger (7) is provided. An air supply heat exchanger (6) shared by a plurality of heat pumps (1) is arranged in the air supply block (11), and a heat source heat exchanger (7) is arranged in each heat source block (12). Air conditioning in which the control device (5) performs a first operation pattern in which the heat pump (1) is started and stopped according to an increase or decrease in the air conditioning load, and a second operation pattern in which the output of the heat pump (1) is increased or decreased. A control unit (15) is provided. [Selection diagram] FIG. 4

Description

The present invention relates to a heat pump type air conditioner.

As an air conditioner provided with a plurality of heat pumps, the one of Patent Document 1 is known. This was a structure in which the heat exchanger for the heat source of the heat pump was shared and the refrigerant was connected to the heat exchanger for air supply by piping so that the refrigerant circulated. With such a structure, the heat pump unnecessary for the air conditioning operation could not be completely stopped, and the minimum limit output of the heat pump had to be increased.

Japanese Unexamined Patent Publication No. 2006-52881

Therefore, when the air-conditioning load is low, such as in the middle period, the air-conditioning capacity cannot be controlled to match the air-conditioning capacity, and the air-conditioning may be too effective or ineffective, resulting in impaired comfort and energy saving.

In order to solve the above problems, the present invention has an air heat source heat pump having an air supply heat exchanger and a heat source heat exchanger, an air supply block through which air conditioning air passes, and a plurality of heat sources through which heat source air passes. A casing having a block for air supply and a control device are provided, and the heat exchanger for air supply, which is shared by a plurality of heat pumps and exchanges heat for air for air conditioning, is arranged in the air supply block. A first operation pattern in which the heat source heat exchanger for heat exchange of the heat source air is arranged for each heat source block, and the control device starts and stops the heat pump according to an increase or decrease in the air conditioning load, and the above. The most important feature is that it is equipped with an air conditioning control unit that performs a second operation pattern for adjusting the output of the heat pump.

According to the first aspect of the present invention, the heat pump unnecessary for the air conditioning operation can be completely stopped, the heating / cooling capacity can be controlled to match the low air conditioning load, wasteful energy consumption is eliminated, and comfort and energy saving are improved. Even if one heat pump should break down, the remaining heat pumps can be used for emergency air conditioning operation. Since the compressor of the heat pump and the fan for the heat source are stopped at the same time, energy saving is achieved and the noise reduction effect at night is excellent. It is possible to suppress the decrease in heating capacity by defrosting by rotation without stopping all multiple heat pumps at the same time during heating operation, and it is possible to extend the life of the equipment . Since the casing is constructed by stacking blocks vertically , the floor area is small and there are few restrictions on the installation location.
According to the invention of claim 2 , the ventilation resistance is small, the pressure loss is reduced, and the contact area (heat transfer area) between the heat exchanger and the ventilation air is increased, so that the heat exchange efficiency is further improved and energy saving is achieved. Is improved.

It is a front view which shows one Example of this invention. It is a plan view of FIG. FIG. 2 is a cross-sectional view taken along the line AA of FIG. It is explanatory drawing which shows the whole structure.

1 to 4 show an embodiment of the heat pump type air conditioner of the present invention. This heat pump type air conditioner is an integrated type equipped with a heat pump 1, a casing 2, an air supply fan 3, a heat source fan 4, and a control device 5 for a plurality of air heat sources, and is used for cooling operation by cold air and heating operation by hot air. It can be switched. The thick dotted arrow in each figure indicates the direction of air flow.

The heat pump 1 repeats the steps of compression, condensation, expansion, and evaporation of the refrigerant, and absorbs heat in the refrigerant evaporation step and dissipates heat in the refrigerant condensation step for the air that exchanges heat with the refrigerant. The heat pump 1 expands the refrigerant heat exchanger 6 and the heat source heat exchanger 7, the compressor 8 that compresses and conveys the refrigerant, and the refrigerant, which are the steps of evaporating and condensing the refrigerant and are different from each other. It is provided with at least a pressure reducing mechanism 9 such as an expansion valve for causing air supply, and a switching mechanism 10 such as a valve for switching between the evaporation process and the condensation process of the air supply heat exchanger 6 and the heat source heat exchanger 7, and the refrigerant circulates therein. It consists of connecting pipes.

The casing 2 includes a supply air block 11 through which air conditioning air passes and a plurality of heat source blocks 12 through which heat source air such as outside air passes, and a plurality of blocks 12 arranged in parallel on the air supply block 11. It is configured so that the heat source blocks 12 are stacked. The air supply block 11 is provided with an air inlet / outlet for air conditioning, and is shared by a plurality of heat pumps 1 and 1 (two in the figure), and heat exchange for air conditioning is performed to cool or heat the air for air conditioning. The device 6, the air supply fan 3 that allows the air conditioning air to pass through the air supply heat exchanger 6 to make cold air or hot air and supply it to the air-conditioned space, and the humidifier 13 that humidifies the air conditioning air. Deploy.

The heat source block 12 is provided with an inlet / outlet for heat source air, and a heat source heat exchanger 7 for exchanging heat with the heat source air and a heat source for passing the heat source air through the heat source heat exchanger 7 and exhausting the heat source to the outside or the like. The fan 4 and the compressor 8 of the heat pump 1 are paired and arranged for each heat source block 12. A plate 14 is provided at the inlet of the heat source air of the heat source block 12 so as to allow air to pass through.

Although not shown, the air supply heat exchanger 6 and the heat source heat exchanger 7 are similar to a known plate fin coil, and have a large number of plate-shaped heat transfer plates through which air passes and a heat transfer plate group. A group of heat transfer tubes for flow of a large number of refrigerants connected to the heat transfer tube. The refrigerant flowing in the heat transfer tube group and the passing air exchange heat via the heat transfer tube group and the heat transfer plate group. The air supply heat exchanger 6 is shared so that the refrigerants of different heat pumps 1 do not mix and flow independently. The heat transfer tube is preferably formed of an elliptical tube, but may be a circular tube.

The control device 5 includes an air conditioning control unit 15 and an alternation control unit 16, and is composed of a microprocessor, various sensors, and the like. The air conditioning control unit 15 simultaneously starts and stops the pair of heat source fans 4 of the heat source block 12 and the compressor 8 of one heat pump 1 having the heat source heat exchanger 7 according to the increase or decrease of the air conditioning load. The first operation pattern and the second operation pattern for increasing / decreasing the output of the compressor 8 of the heat pump 1 are switched or combined.

Since the heating / cooling capacity required for one air conditioner is distributed by the plurality of heat pumps 1 in this way, the minimum limit output of the entire air conditioner can be suppressed to one heat pump. Further, since the compressor 8 of the heat pump 1 and the fan 4 for the heat source are stopped at the same time, energy saving is achieved and the noise reduction effect at night is excellent.

The alternation control unit 16 rotates the heat pump 1 to perform the first operation pattern according to one or both of the increase / decrease in the air conditioning load and the necessity of defrosting the heat exchanger 7 for the heat source. The increase / decrease in the air conditioning load and the necessity of defrosting are detected by sensors and the like. The heat pump 1 to be rotated may be random, but it is preferable to select the heat pump 1 so that the operating time of the compressor 8 is averaged from the viewpoint of equipment life.

The present invention is not limited to the above-mentioned examples. For example, the number of heat pumps 1 may be 2 or more, and the equipment of the heat pump 1 other than the air supply heat exchanger 6 and the heat source heat exchanger 7 can be installed in either the air supply block 11 or the heat source block 12. It may be provided. The number of heat source heat exchangers 7 arranged in one heat source block 12 can be freely increased or decreased.

1 Heat pump 2 Casing 5 Control device 6 Heat supply heat exchanger 7 Heat source heat exchanger 11 Air supply block 12 Heat source block 15 Air conditioning control unit 16 Alternate control unit

Claims (2)

An integrated heat pump type air conditioner including a heat pump (1) for a plurality of air heat sources, a casing (2), a heat source fan (4), and a control device (5).
The casing (2) includes a plurality of heat sources having a supply air block (11) through which air conditioning air passes and a plurality of heat source blocks (12) through which outside air passes as heat source air. The block (12) is configured to be stacked on the air supply block (11).
The heat pump (1) is arranged in the air supply heat exchanger (6) arranged in the air supply block (11) to exchange heat with the air conditioning air, and arranged in the heat source block (12). A heat source heat exchanger (7) for heat exchange of the heat source air and a compressor (8) are provided.
For each heat source block (12), the compressor (8) of the heat pump (1) and the heat source air are passed through the heat source heat exchanger (7) and exhausted to the outside. (4) and are arranged in pairs,
The control device (5) includes the compressor (8) of the heat pump (1), which is unnecessary for the air conditioning operation among the plurality of heat pumps (1) according to the air conditioning load, and the pair of the heat source fan. An air conditioning control unit (15) that simultaneously stops (4) and a replacement control unit (16) that rotates a plurality of the heat pumps (1) to defrost the heat source heat exchanger (7). A heat pump type air conditioner characterized by being equipped. The heat pump type air conditioner according to claim 1, wherein the heat transfer tubes of the air supply heat exchanger (6) and the heat source heat exchanger (7) are formed of an elliptical tube .

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