JPS63131964A - Engine drive type air-conditioning hot-water supply device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The invention of B relates to a heat pump-type air-conditioning, heating, and hot-water supply system that uses an engine as a driving source, and is particularly useful for detecting abnormalities caused by failures in the transmission system between a compressor and an engine. The present invention relates to an engine-driven air-conditioning, heating, and hot-water supply system that simplifies the process.

[Conventional technology]

In recent years, with the diversification of energy, for example, natural gas,
2. Description of the Related Art Various engine-driven beat pump type air-conditioning, heating and hot-water supply systems using gasoline, light oil, etc. as fuel have been proposed, including Japanese Patent Laid-Open Nos. 58-164970 and 1987-179781.

FIG. 5 is a system configuration diagram of this kind of conventional engine-driven heat pump type air-conditioning/heating/hot-water supply apparatus in which three units are connected as indoor units. Hereinafter, the configuration and simple operation of a conventional beat pump type air-conditioning/heating/hot-water supply system will be explained based on FIG. 5.

First, the compressor 2 of the refrigerant circuit driven by the engine 1
The engine 1 and the clutch 3 are connected to each other. The indoor units 4, 5.6 each consist of a heat exchanger 7, 8, 9 and an indoor controller 10.11.12, and each indoor unit 4, 5.6 is connected to an outdoor system through a communication line 13, 14.15. It is designed to be able to communicate with the controller 16. The outdoor unit is equipped with a throttle device 17 such as an expansion valve. An outdoor heat exchanger 18 and the like are provided, and these are sequentially connected by refrigerant piping to form a refrigerant circuit constituting a refrigeration cycle. The refrigerant circuit is switched indoors using the switching valve 19.

Cooling or heating is performed by using the external heat exchange lid as a condenser for heat radiation or an evaporator for heat absorption.

Also, the solenoid valves 20°21, 22.2 installed on the outdoor side:
By controlling the flow of refrigerant using 1, 24 and 25, each indoor unit 4, 5, and 6 is turned on and off for air conditioning operation, and the solenoid valve 26 is opened and closed, and the heat exchanger 27 is used to perform heat pump hot water supply operation. .

In addition to the above configuration, a hot water storage tank 28 is provided separately.
A water supply pipe 29 is connected to the lower part thereof, and a hot water supply pipe 30 is drawn out from the upper part, so that hot water can be appropriately supplied from the hot water supply port 31. In this hot water tank 28, cooling water is circulated and supplied to a heat exchanger 32 for exhaust heat recovery attached to the exhaust pipe side of the engine 1, thereby cooling the engine 1 (exhaust heat is recovered). Cooling water @
A heat exchanger @133 for storing hot water, which constitutes a part of the main body, is provided. This cooling water circuit includes a reservoir tank 34. It is equipped with a cooling water circulation pump 35 and is configured to heat water in the hot water storage tank 28 with heat generated as the engine 1 operates, thereby supplying hot water.

At the same time, by switching the solenoid valve 36 and operating the refrigerant heating pump 37, the refrigerant is circulated and heated through the refrigerant heating heat exchange J# 38 disposed in the cooling water circuit for exhaust heat recovery of the engine 1, thereby heating the refrigerant. This allows for refrigerant heating operation at any time.

Furthermore, a display device 3 that displays the temperature of the hot water storage tank 28 is provided.
9. A central remote control 41 comprising an operation mode switch 40 and the like for inputting the operation mode of the entire system is connected to the system controller 16 by a communication line M442, and data is transmitted and received through this communication line 42.

The operation mode signal of the system controller 16, Ffl control 41, and the indoor unit? , 8 and 9, and the operation is carried out. Temperature information necessary for operation control is detected by temperature sensors 43, 44, and 45 to ensure optimal system operation. Also, signal line 4
6.47.48 connects between the temperature sensors 43, 44, 45 and the system controller 16, and signal lines 49.50.5
1.52.5B and 54.55.5B are for sending control signals from the system controller 16 to the solenoid valves 2B and 20.21.22.23.24.25.36, respectively, and furthermore, the cooling water circulation pump 35 is connected to the system controller 16 by a signal line 57, and the refrigerant heating pump 37 and the system controller 16 are connected by a signal IJ5g.

FIG. 6 is a diagram showing a case where a clutch and a V-belt are used in the power transmission section between the engine 1 and the compressor 2.

The rotation speed of the engine 1 is determined by the iron piece 81 attached to a part of the engine pulley 60 and the coil 62 provided opposite to it.
The voltage detected by the engine 1 and induced in the coil 62 is waveform-shaped at the rotation speed detection time $63, so that a signal proportional to the rotation speed of the engine 1 is output. Also, the rotation of the engine pulley is controlled by the pressure ms pulley B5 through the V belt 64.
When the clutch 3 is turned on, the compressor 2 is driven. Mayu, the rotation of engine 1 is engine pulley 60→
The rotation is transmitted through a V-belt 64→compressor pulley 65 system, and the rotation transmission to the compressor 2 is controlled by the ON10FF of the clutch 3.

[Problem that the invention seeks to solve]

However, in the conventional engine-driven cooling/heating/water heating system configured as described above, the device that transmits the rotation of the engine 1 to the compressor 2 or controls it may not be able to perform its function normally due to failure or damage. If not, compressor 2
The refrigerant gas suction and discharge cycles were not working, causing problems with cooling, heating, and hot water supply operations.
Since there is no means to easily detect damage, there is a problem in that it requires a great deal of effort, time, and equipment to determine if there is a problem within the entire system.

This invention was made to solve these problems, and provides an engine-driven air-conditioning/heating/water heating system that can easily detect failures or damage to the rotation transmission part from the engine to the compressor body at low cost. The purpose is to

[Means for solving problems]

The engine-driven air conditioning/heating and hot water supply system according to the present invention includes a state detection means for detecting the state of the compressor, and whether or not an abnormality has occurred in the power transmission means from the engine to the compressor based on an output signal from the state detection means. The apparatus is equipped with means for determining whether or not the present invention is true, and means for displaying the determination result of the determination means.

[For production]

In this invention, when the state of the compressor detected by the state detection means, that is, the rotation information of the compressor or the discharge gas temperature information is input to the determination means, the determination means processes the input information to determine whether it is normal. When it is determined that the rotation speed or discharge gas temperature is not at the normal rotation speed or discharge gas humidity, it is assumed that an abnormality has occurred in the power transmission means, and this is displayed on the display means. . This simplifies the detection of abnormalities in the power transmission means and makes it possible to improve the efficiency of maintenance work.

〔Example〕

An embodiment of the invention of B will be described below with reference to FIGS. 1 and 2.

FIG. 1 shows a schematic configuration diagram of a power transmission mechanism between an engine and a compressor and a rotation detecting means of an engine-driven air-conditioning/heating/hot-water supply apparatus according to the present invention.

In this figure, the same reference numerals as in FIG. 5 indicate the same or corresponding parts. Further, 66 is a rotation detector for detecting the rotation of the compressor 2, which includes a magnet piece 67a attached to the driven side of the clutch 3 of the compressor 2, and a coil provided on the fixed side opposite to this magnet piece 67a. 67b, and the magnet piece 6
When the magnetic flux of 7a cuts the coil 67b, the coil 67
The voltage induced in b is supplied to a wave-shaped circuit 68 and is converted into a compressor rotation signal (pulse). The output signal from the waveform shaping circuit 68 is input to a system controller 69.

The system controller 69 is composed of a one-chip microcomputer as shown in FIG. 2, and includes an interrupt controller 70 that controls interrupts generated externally and internally, and a clock signal from an external oscillator 71 that is divided a timer 72 that controls time; a ROM 73 that stores a system program; a decoder 74 that decodes instructions read from the ROM 73; ALU
) 75, a RAM 76 that stores the calculation results of the ALU 75 and other data, and an input/output coupler 7 that transfers input/output to/from the outside. Circuit 68 and transmission system abnormality indicator 7
8 are connected.

In the engine-driven air-conditioning/heating/water supply system of this embodiment configured as described above, when the system is operated for cooling/heating and hot water supply, the engine 1 is started and the clutch 3 is turned off.
When N is applied, the rotation of the engine 1 is as follows:
The power is transmitted to the compressor 2 through the power transmission system of 64-pulley 65-clutch 3, and the compressor 2 is driven to perform respective operations according to the operation mode. At this time, the rotation of the pulley 65 is detected by the rotation detector 66, and the voltage induced in the coil 67b is converted into a pulse waveform by the waveform shaping circuit 68 and input to the system controller 69. The system controller 69 counts the pulse signals input thereto, calculates the rotation speed of the compressor 2 using the timer 72, and determines whether or not there is an abnormality in the rotation transmission system from this calculated value. . That is,
After starting the engine 1, turn the clutch 3 ON, but if the rotation of the compressor 2 cannot be detected or the calculated value does not reach the specified rotation speed range, It is determined that there is an abnormality. When such a determination is made, the system controller 69 sends a signal to the display 78 through the input/output coupler door 7, and lights up the signal to notify that an abnormality has occurred in the rotation transmission system.

Therefore, users of the air-conditioning, heating, and hot-water supply system should check the abnormality indicator 7.
By visually confirming the lighting of No. 8, abnormalities in the rotation transmission system can be immediately recognized, and failure analysis during system maintenance can be easily and quickly performed, and system maintenance work can be carried out more efficiently. You can expect it.

3 and 4 show ■Belt 64. This shows another embodiment of the invention in which an abnormality in the rotation transmission system such as the clutch 3 can be detected using the discharge gas temperature detection sensor 44 of the compressor 2.

As shown in FIG. 3, the discharge gas temperature sensor 44 attached to the compressor 2 was conventionally used only to monitor the temperature of the discharge gas in order to protect the compressor, as is clear from FIG. However, this system can also be used to detect abnormalities in the rotation transmission system, and the temperature signal from the discharge gas temperature sensor 44 is input to the system controller 69. , clutch 3
The controller has a function of monitoring the temperature of the gas discharged from the compressor 2 within a predetermined period of time after the controller is turned on, and determining whether or not the gas humidity has increased.

FIG. 4 is a flowchart showing a rotation transmission system abnormality determination program, and this program is used by being called as a subroutine on the main routine of the entire system.

Next, the operation of this embodiment will be explained based on the free chart of FIG.

When the subroutine for transmission system abnormality determination is called and the program shown in FIG. 4 starts, first, step S
1, it is determined whether or not a clutch ON signal is output after engine starting is completed.

Here, when it is determined that the clutch ON signal is not output, the subroutine returns, and when it is determined that the clutch ON signal is output, the next step S
2, it is checked whether the clutch ON signal has been output for 5 minutes or more, and it is determined whether the compressor 2 has been rotationally driven after the clutch has been turned ON. Here, "O
If the judgment is “N”, return the subroutine,
In the case of "YES", after the time has elapsed during which the compressor 2 would have been sufficiently rotated by the 5-minute timer over process, it is determined in the next step S3 whether or not the refrigerant temperature on the discharge side has increased. If the rotation is transmitted to the compressor 2 and it is operating normally, the temperature of the gas discharged from the compressor 2 will rise, so the gas temperature will be detected by the temperature sensor 44 and input to the system controller 69. It is determined that the discharge gas temperature has increased. Thereafter, the process proceeds to step 84, where normal processing of the transmission device is executed and the subroutine is returned.

In addition, if the determination result in step S3 is that the temperature of the discharged gas does not rise, the process moves to step S5 to execute abnormality processing for the rotation transmission device, turn on the abnormality indicator 78, and turn on the belt, clutch, etc. Notify the user, etc. that an abnormality has occurred in the rotation transmission system.

In the above embodiment, although the input parameters for abnormality determination are different, the same effects as in the case of FIG. 1 can be obtained.

〔Effect of the invention〕

As described above, according to the present invention, the compressor driven by the engine via the rotation transmission system is provided with a sensor that detects the rotation or the state such as the discharge gas temperature, and the output signal from the state sensor Since we have provided a means to determine whether or not an abnormality has occurred in the rotation transmission system based on this, it is possible to detect failures and abnormalities in the system that transmits rotation from the engine to the compressor at low cost.
Moreover, it can be easily detected, and by adding an abnormality indicator means, abnormalities in the rotation transmission system can be immediately identified, so failure analysis during system maintenance can be carried out quickly and reliably, and it can also be done more efficiently. The effect is that good maintenance work can be expected.

[Brief explanation of the drawing]

FIG. 1 is a system configuration diagram showing an embodiment of an engine-driven air-conditioning/heating and hot water supply device according to the present invention, and FIG. 2 is a block diagram showing details of the system controller section in FIG. 1.
FIG. 3 is a system configuration diagram showing another embodiment of the present invention;
Fig. 4 is a flowchart showing its operation, Fig. 5 is a system configuration diagram showing the entire conventional engine-driven air conditioning/heating and hot water supply system, and Fig. 7 is a schematic configuration diagram showing the rotation transmission system of the engine and compressor. . 1 ・Engine, 2. Compressor, 3...Clutch, 4°5.6 ・Indoor unit, 7, 8, 9 ・Heat exchanger,
10.11, 12 - Indoor controller, 28 Hot water storage tank, 41 Centralized remote control, 44 - Temperature sensor (state detection means), 66 Rotation detector (state detection means), 6
7a... Magnet piece, 67b... Coil, 64 V belt,
60, 65 ・Pulley, 68 ・Waveform shaping circuit, 69
System controller, 78/Error indicator. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (3)

[Claims] (1) A cooling water circuit in which a compressor of a refrigerant circuit is driven by an engine, exhaust heat from the engine is recovered by a cooling water circulation pump and stored in a hot water storage tank, a plurality of indoor units each having a heat exchanger, and a plurality of indoor units having a heat exchanger, from the engine to the compressor. In the engine-driven air-conditioning, heating, and hot water supply system, the system includes a state detection means for detecting the state of the compressor, and whether or not an abnormality has occurred in the power transmission means based on an output signal from the state detection means. What is claimed is: 1. An engine-driven air-conditioning, heating, and hot-water supply system, characterized in that it is provided with means for determining and means for displaying the determination result of the determining means. (2) The engine-driven air-conditioning/heating/water supply system according to claim 1, wherein the state detection means comprises a rotation detector that detects rotation of the compressor. (3) The engine-driven air-conditioning/heating/water supply system according to claim 1, wherein the state detection means is comprised of a temperature sensor that detects the temperature of the gas discharged from the compressor.