JPS63282438A - Air conditioner - Google Patents

Abstract

PURPOSE:To minimize the opportunity of the OFF-operation of a compressor and reduce the change in room temp. by installing a means for computing space cooling and heating capacity which is equipped with a timer device and determines the space cooling and heating capacity by the output from a temp. detecting means. CONSTITUTION:When an air conditioner is started again after the conditioner is brought in off condition during space cooling/heating operation, a compressor 5 is operated in its revolving speed as slower as possible on the basis of such changing condition in room temp. as the compressor 5 is brought in off condition at the minimum revolving speed and its suction temp. after the elapse of a fixed time is found out by a temp. detector 2. Thereby, an operation which minimizes the change in the room temp. and is economical can be carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an air conditioner, and particularly to an air conditioner that provides a comfortable environment for residents at all times.

(Prior art) Figure 4 shows, for example, a catalog of inverter room air conditioners (product name Kimigamine) manufactured by Sanni Denki Co., Ltd.
FIG. 8 is a block diagram of the A8 system of a conventional air conditioner as shown in Reference numeral 1 denotes a heating and cooling capacity generating device, which includes a compressor 5 whose rotation speed can be varied. 2
is a suction air temperature (room temperature) detector, 6 is a human power unit for setting the set temperature, etc., and both are a heating and cooling capacity variable device 3.
is connected to the input circuit 7 of. This calculation means 3 includes a central processing unit 8, a storage device 9, an input circuit 7, and an output circuit 1.
0, the capacity is calculated based on the input data from the temperature detector 2 and the manual human power unit 6, and the capacity value to be generated is instructed from the output circuit IO to the heating and cooling capacity variable device 4.

Next, the operation of the air conditioner will be described in the case of heating operation using the operation sequence flowchart shown in FIG.

When a power switch (not shown) is turned on, the flowchart shown in FIG. 5 starts. In step S1, a predetermined set temperature Ts is set. In step S2, the room temperature (=intake air temperature) Tr manually input from the temperature sensor 2 is input. Next, in step S3, the temperature difference (dT) is calculated from the set temperature Ts and the suction air temperature Tr, and in step S4, if the suction air temperature T' does not exceed the set temperature Ts,
In step S5, when the room temperature is approaching the set temperature based on the temperature difference (dT), the heating capacity is gradually reduced, and the room temperature T
The heating capacity is calculated so that the heating capacity is increased by 1 when r becomes lower than a certain range centered on the set temperature Ts.

According to the calculated heating capacity, the cooling/heating unit 1 capacity variable device 4 changes the capacity in step S6, controls the rotational speed of the compressor 5 in step S7, and operates to change the capacity of the cooling capacity generating device 1. .

However, in step S4, the room temperature Tr changes to the set temperature Ts.
If the temperature is higher, the compressor 5 is turned off and the heating operation is stopped. Then, when the room temperature Tr falls below the set temperature Ts again, the heating operation is restarted. In this way, control is performed so that the room temperature Tr is maintained approximately near the set temperature Ts.

[Problem that the invention seeks to solve]

FIG. 6 shows a control characteristic diagram of heating capacity when heating operation is performed in the conventional example.

Conventional air conditioners constantly detect the room temperature Tr and use the difference between the room temperature Tr and the set temperature Ts to increase the heating and cooling capacity if the difference is large, and to reduce the heating and cooling capacity if the difference is small. By calculating the heating and cooling capacity and changing the capacity using the heating and cooling capacity variable device 4, heating and cooling operation is performed so that the room temperature Tr is always maintained near the set temperature Ts while changing the rotational speed of the compressor 5. Because of this, the start-up is generally slower.

In addition, for example, in the case of heating operation, the room temperature Tr is the set temperature Ts
When the temperature becomes higher, the compressor 5 is turned off and the heating operation is stopped regardless of the heating capacity at that time. However, there is a mechanical constraint that once the cooling/heating operation is stopped, it takes time to start the cooling/heating operation again, so in the case of the above control, as shown in FIG. As a result, the temperature inside the room changes greatly, and residents feel cold in the shaded area in the diagram. Similarly, a phenomenon similar to the above occurs also in cooling operation.

In addition, a relatively large heating and cooling capacity is required when restarting, and compression 4i15 is required from the standpoint of energy saving and equipment life.
There was a problem in that turning on and off is not desirable.

This invention was made in order to solve the above-mentioned problems of the conventional method.It minimizes the chances of the compressor turning off, reduces indoor temperature changes, and creates a comfortable environment for the occupants. The purpose of the present invention is to provide an air conditioner that is both energy efficient and energy efficient.

[Means for solving problems]

For this reason, the present invention provides a heating and cooling system equipped with a heating and cooling capacity generating device that can vary the heating and cooling capacity, a temperature detecting means for detecting the intake air temperature, and a timer mechanism that determines the heating and cooling capacity based on the output of the detecting means. The above object is achieved by configuring the heating and cooling capacity generator to change the capacity of the heating and cooling capacity generating device using a heating and cooling capacity variable means based on the output of the calculating unit.

(Function) With the above configuration, this air conditioner turns off the compressor at the lowest rotational speed when restarting after the air conditioner is turned off during cooling/heating, and the suction temperature after a certain period of time is is detected and the engine is operated at the lowest possible rotational speed depending on the state of the room temperature change, so that fluctuations in indoor temperature are small and economical operation is possible.

(Example〕 The present invention will be described above based on examples.

(Structure) FIG. 1 shows an embodiment of the air conditioner according to the present invention (
It is a block diagram of Z system.

In the figure, 1 is a heating and cooling capacity generating device that generates heating and cooling capacity and can change the capacity, 2 is a suction air temperature (room temperature) detector, 3 is a heating and cooling capacity calculation means, and 4 is a heating and cooling capacity q.
The variable means 5 is a compressor that can change the rotation speed, and 6 is a manual power section. Inside the heating and cooling capacity calculation means 3, a timer 11 is provided, which is composed of an input circuit 7, a central processing unit 8, a storage device 9, and an output circuit 10, and is capable of setting a predetermined elapsed time. The input circuit 7 receives the intake air temperature detected by the human input unit 6 and the temperature detector 2 for setting the set temperature and the like. Based on the output from the output circuit 10, the heating and cooling capacity variable device 4 changes the rotational speed of the compressor 5 in the heating and cooling capacity generating apparatus 1, thereby changing the capacity of the heating and cooling capacity generating apparatus 1.

(Operation) Next, regarding the operation of the above embodiment in heating operation,
This will be explained based on FIG. 2.3. FIG. 2 is an operation sequence flowchart of the control algorithm stored in the heating and cooling capacity operator stage 3, and FIG. 3 is a control characteristic diagram thereof.

First, when the power is turned on, the flowchart shown in FIG. 2 starts. A set temperature A is set in step S1. When the air conditioner is turned on during heating operation in step S2, the suction air temperature Ttl and the set lower limit temperature B are compared in step S3, and the suction air temperature Tri is the set lower limit temperature B.
If the temperature is higher, the process returns to step S2 and continues in that state. If the room temperature, that is, the intake air temperature Tri, falls below the set lower limit temperature B, this temperature Tri is stored in step S4, and the heating and cooling capacity variable device M1 is changed in step S5. The minimum rotational speed is set in step S6, the compressor 5 is operated at the minimum rotational speed in step S6, and after the predetermined time To set in advance by the timer 11 has elapsed in step S7, the room temperature, that is, the suction temperature Tr2 is newly set in step S8. If it is detected and Tr2 is lower than Tri, the heating and cooling capacity variable system is installed! At t4, the rotation speed is set to increase, and at step 311, the compressor 5 is operated at the newly set rotation speed. Also, in step S9, T
If r2 is higher than Tri or there is no change, the air conditioner continues to be turned on at the lowest rotational speed.

Fig. 3 is a control characteristic diagram when heating operation is performed based on this embodiment. The temperature Tri gradually decreases and reaches the set lower limit temperature B.

At this time, the heating and cooling capacity variable device 4 is set to the lowest rotational speed, and the air conditioner is turned on. From this, the timer 11 operates at the minimum rotational speed if the intake air temperature Tr2 detected by the temperature detector 2 remains unchanged or increases after a predetermined time has elapsed. On the other hand, if the suction air temperature Tr2 is further lower than the set lower limit temperature B, the rotational speed is reset to a higher value and the engine is operated at this rotational speed. In this way, it operates economically at as low a rotational speed as possible.

The above description has been made regarding the heating operation, but the same applies to the cooling operation and the same applies to the above, so a detailed explanation will be omitted.

〔Effect of the invention〕

As explained above, according to the present invention, when the air conditioner is restarted after being turned off during cooling or heating, it is turned on at the lowest rotational speed, and the intake air temperature is detected after a predetermined period of time. Since the system is configured to operate at the lowest possible rotational speed depending on changes in room temperature, efficient and economical operation can now be achieved.

[Brief explanation of drawings]

FIG. 1 is a signal system block diagram showing an embodiment of an air conditioner according to the present invention, FIG. 2 is a sequence flowchart showing the operation of FIG. 1, and FIG. 3 is a control characteristic diagram thereof.
Figure 4 is a signal system blow diagram of a conventional air conditioner.
FIG. 5 is a sequence flowchart showing the operations of FIGS. and 4, and FIG. 6 is a control characteristic diagram thereof. In each figure, the same reference numerals indicate the same or equivalent components. 1... Air conditioning capacity generator 2... Temperature detector 3... Cooling/heating usage calculation means 4... Air conditioning capacity variable device 5... Compressor 11... Timer

Claims (1)

[Scope of Claims] 1) A heating and cooling capacity generating device that generates heating and cooling capacity and can vary the capacity, a temperature detection means for detecting the temperature of the intake air, and an output of the temperature detection means to increase the heating and cooling capacity. A heating and cooling capacity calculating means including a timer means for determining the heating and cooling capacity, and an output from the heating and cooling capacity calculating means to change the rotational speed of the compressor of the heating and cooling capacity generating device to change the capacity of the heating and cooling capacity generating device. An air conditioner characterized by comprising: a cooling/heating capacity variable means configured as shown in FIG. 2) The heating and cooling capacity calculation means sets the heating and cooling capacity generation device to the minimum capacity by the heating and cooling capacity variable means when the air conditioner is turned off and the intake air temperature reaches the set lower limit temperature during heating operation. If the intake air temperature remains unchanged or increases after a predetermined period of time, the air conditioner continues to be turned on with the same capacity, and if the temperature decreases, the heating and cooling capacity variable means The air conditioner according to claim 1, wherein the air conditioner is configured to gradually increase the capacity of the heating capacity generating device. 3) The heating and cooling capacity calculating means sets the capacity of the cooling capacity generating device to the minimum capacity by the heating and cooling capacity variable means when the air conditioner is turned off and the intake air temperature reaches the set upper limit temperature A during cooling operation. and then turn it on after the specified time.
If the intake air temperature remains unchanged or is decreasing, the air conditioner is continued to be turned on at the same capacity, and if the temperature is rising, the capacity of the cooling capacity generating device is gradually increased by the cooling/heating capacity variable means. The air conditioner according to claim 1, wherein the air conditioner is configured to be raised.