JPS6284246A - Air conditioner with auxiliary heater-attached heat pump - Google Patents

Abstract

PURPOSE:To improve the space heating rise-up time characteristic by setting the difference in the temperature between the room temperature and the set temperature in a plurality of zones so that the room temperature can quickly reach the set temperature when space heating has been started, and emitting a space heating operation instruction in accordance with these zones. CONSTITUTION:An air conditioner comprises a temperature difference detector 15 for setting a difference between a temperature detecting a room temperature sensor 13 and a temperature set by a temperature setter 14 in a plurality of zones, and for detecting the temperature difference between these zones, and a space heating condition detector 16 for detecting the operational condition immediately after starting of the space heating operation or the ordinary operational condition. Immediately after starting of the space heating operation, the apparatus is caused to rapidly reach the set temperature by a combined operation of an auxiliary heater 19 and a compressor 18 up to a set temperature, and rapid lowering of the room temperature is prevented by the operation of only the auxiliary heater or the compressor 18 up to a predetermined temperature exceeding the set temperature. When the air conditioning load is large, the auxiliary heater or the compressor is forcibly operated for a predetermined period of time exceeding the set temperature to prevent the lowering of the room temperature, and during the normal operation, only the compressor is operated up to the set temperature to obtain a comfortable space heating.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a heat pump type air conditioner.

BACKGROUND OF THE INVENTION In recent years, it has become a major issue to improve the heating start-up characteristics of heat pump air conditioners at the start of heating operation, to quickly reach the set temperature, and to improve comfort.

The conventional heat pump type air conditioner with an auxiliary heater as described above will be described below with reference to the drawings.

FIG. 4 shows a block diagram of a conventional heat pump type air conditioner with an auxiliary heater.

1 is a power supply, and 2 is a rectifier circuit that rectifies AC power into DC power. 3 is a room temperature sensor that detects the indoor temperature, 47M
(7) Temperature setting device for setting temperature, 5 is room temperature sensor 3
This is a temperature difference detection device that detects the temperature difference between the temperature setting device 4 and the temperature setting device 4. A control device 6 performs heating control in response to a signal from the temperature difference detection device 6, and is composed of a compressor 7 and an auxiliary heater 8, which operate in response to an operation command signal from the control device 6.

The operation of the heat pump type air conditioner with auxiliary heater configured as described above will be explained below.

First, immediately after the heating operation starts, the room temperature is detected by the room temperature sensor 3, and the temperature difference detection device 5 compares the temperature difference between the detected temperature of the room temperature sensor 3 and the temperature setting device 4, and the temperature difference is determined to a predetermined value. When the temperature difference reaches the predetermined value, a signal indicating that the temperature difference has reached the predetermined value is given to the control device 6. Immediately after receiving the temperature difference predetermined value arrival signal, the control device 6 determines that the room temperature sensor 3 is close to the set temperature, and
A command signal to continue operation is issued to the compressor 7, and a stop command signal is issued to the auxiliary heater 8.Problems to be Solved by the InventionHowever, with the above configuration, immediately after the heating operation starts, the temperature distribution throughout the room is still not uniform. Since the auxiliary heater is stopped when the temperature is lower than the set temperature and the temperature is not uniform, it takes a considerable amount of time to reach the set temperature when only the compressor is operated. However, the room temperature does not reach the set temperature even after a long period of time, resulting in poor warming and discomfort.

In view of the above drawbacks, the present invention sets the temperature difference between the room temperature and the set temperature in multiple zones and issues a heating operation command according to the zone so that the room temperature can quickly reach the set temperature when heating operation starts. The present invention provides a heat pump type air conditioner with an auxiliary heater that is characterized by improved heating start-up characteristics.

Means for Solving the Problems In order to solve the above problems, the heat pump type air conditioner with an auxiliary heater of the present invention sets the temperature difference between the room temperature sensor and the temperature setting device in a plurality of zones. The device is comprised of a temperature difference detection device that detects a temperature difference between the two, and a heating operation state detection device that detects immediately after the start of heating operation or the normal operation state.

Effect The present invention has the above-described configuration, so that immediately after the heating operation starts,
By operating the auxiliary heater and compressor together until the set temperature is reached, the set temperature is quickly reached, and only the auxiliary heater or compressor is operated until the set temperature is exceeded and the predetermined temperature is reached, thereby preventing a sudden drop in room temperature. In addition, when the air conditioning load is large, the auxiliary heater or compressor is forcibly operated for a predetermined period of time above the set temperature to prevent the room temperature from dropping, and during normal operation, only the compressor is operated up to the set temperature. , comfortable heating can be obtained.

EXAMPLE Hereinafter, a heat pump type air conditioner with an auxiliary heater according to an example of the present invention will be described with reference to the drawings.

FIG. 1 shows a block diagram of a heat pump type air conditioner with an auxiliary heater in an embodiment of the present invention.

In FIG. 1, 11 is a power supply, 12 is a rectifier circuit that converts AC voltage into DC, 13 is a room temperature sensor that detects indoor temperature, 14 is a temperature setting device that sets the indoor temperature, 1
6 is a temperature difference detection device that sets the temperature difference between the room temperature sensor 13 and the temperature setting device 14 in a plurality of zones, and detects the temperature difference between the zones. Reference numeral 16 indicates a heating operation state detection device for detecting the heating operation of a heat pump type air conditioner with an auxiliary heater (not shown) or the normal operation state, and 17 indicates a post-heating operation state upon receiving a signal from the temperature difference detection device 16. This is a control device that grasps the signal from the detection device 16 and performs heating control according to its operating state, and is composed of a compressor 18 and an auxiliary heater 19 that operate in response to an operation command signal from the control device 17. .

Regarding the heating control of the heat pump type air conditioner with an auxiliary heater configured as described above, an example of the correspondence between the operating status of the compressor and the auxiliary heater and the control characteristics for the set temperature and indoor temperature is shown below, as well as a description of the operation. Explaining the status 0 First, the temperature difference between the set temperature and the room temperature is divided into six zones. That is, the range where the room temperature is 1° C. or more higher than the set temperature is defined as the H zone, the range that is 0° C. or more and 2° C. or more and less than 4° C. lower is the D zone, and the range that is 4° C. or more lower is the E zone. Table 1 shows the ranges and temperature differences of these five zones.

Table 1 In addition, Table 2 provides commands to start and stop the compressor and auxiliary heater depending on the heating operation status within these six zones.
Correspond as follows.

Table 2 That is, if the room temperature is in zone B immediately after the start of heating operation, the temperature difference detection device 15 determines that the room temperature has reached the set temperature, and provides the control device 17 with an arrival signal. This means that the control device 17 receives this arrival signal, stops the operation of the compressor 18, and issues a command to operate only the auxiliary heater 19. Also, if it is in the A zone, the control device 1
7, a signal indicating that a predetermined temperature exceeding the set temperature has been reached is given. This means that the control device 17 determines that sufficient heating start-up capability has been obtained and gives a stop command to the auxiliary heater 19.

In addition, during normal operation after the indoor temperature reaches the set temperature, if the room temperature is in zone B, the control device 17 determines that sufficient heating capacity has been obtained and the set temperature has been reached, and the compressor 18
This means that the auxiliary heater 19 is stopped. If the air conditioner is in the C zone, the control device 17 determines that the air conditioning load has become slightly larger and gives an operation command to the compressor 18. In addition, in zone B immediately after heating starts,
The maximum operating time of the auxiliary heater is 6 minutes.

As described above, by dividing the temperature difference between the set temperature and the indoor temperature into multiple zones and making the range of these zones correspond to the heating operation status, the heating start-up characteristics immediately after heating starts are improved, and the set temperature is reached. During normal operation, the comfort of heating can be easily achieved by performing appropriate heating control.

Effects of the Invention As described above, the present invention divides the temperature difference between the set temperature and the room temperature into multiple zones, sets the temperature difference, and also allows the compressor and auxiliary heater to be operated together or to adjust the set temperature in correspondence with the heating operation state. By operating only the auxiliary heater or compressor in consideration of a predetermined temperature value or predetermined time, heating control can be performed with an appropriate understanding of the heating load, improving heating start-up characteristics and improving comfort. obtained, and its practical effects are great.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a heat pump type air conditioner with an auxiliary heater according to the present invention, FIG. 2 is a flowchart showing the operation of a specific example of the present invention, and FIG. 3 is an operational diagram of a specific example of the present invention. FIG. 4 is a block diagram of a conventional example. 13... Room temperature sensor, 14... Temperature setting device, 1510. ,...Temperature difference detection device, 16...
...Heating operation state detection device, 17...Control device, 18..., Compressor, 19...Auxiliary heater. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 Unexpected luck

Claims (1)

[Claims] A compressor, an auxiliary heater, a room temperature sensor that detects the indoor temperature, a temperature setting device that sets the indoor temperature, and temperature differences between the room temperature sensor and the temperature setting device are set in multiple zones, and the temperature difference between the room temperature sensor and the temperature setting device is set in multiple zones. a temperature difference detection device that detects a temperature difference between the heating operation state and the heating operation state detection device that detects the temperature difference immediately after the start of the heating operation or the normal operation state; It consists of a control device that outputs start/stop commands to the compressor and auxiliary heater.
The compressor and auxiliary heater will be operated together, and only the auxiliary heater or compressor will be operated until the set temperature is exceeded and the set temperature is reached or for a specified time, and then during normal heating operation, when the set temperature is approached, the auxiliary heater will be operated. The heater stopped and only the compressor
A heat pump type air conditioner with an auxiliary heater is characterized in that the auxiliary heater is operated if the room temperature continues to drop to a predetermined temperature even though the compressor is operating.